---
v2: rebase
---
Documentation/arch/powerpc/cxlflash.rst | 433 --
Documentation/arch/powerpc/index.rst | 1 -
.../userspace-api/ioctl/ioctl-number.rst | 2 +-
MAINTAINERS | 9 -
drivers/scsi/Kconfig | 1 -
drivers/scsi/Makefile | 1 -
drivers/scsi/cxlflash/Kconfig | 15 -
drivers/scsi/cxlflash/Makefile | 5 -
drivers/scsi/cxlflash/backend.h | 48 -
drivers/scsi/cxlflash/common.h | 340 --
drivers/scsi/cxlflash/cxl_hw.c | 177 -
drivers/scsi/cxlflash/lunmgt.c | 278 --
drivers/scsi/cxlflash/main.c | 3970 -----------------
drivers/scsi/cxlflash/main.h | 129 -
drivers/scsi/cxlflash/ocxl_hw.c | 1399 ------
drivers/scsi/cxlflash/ocxl_hw.h | 72 -
drivers/scsi/cxlflash/sislite.h | 560 ---
drivers/scsi/cxlflash/superpipe.c | 2218 ---------
drivers/scsi/cxlflash/superpipe.h | 150 -
drivers/scsi/cxlflash/vlun.c | 1336 ------
drivers/scsi/cxlflash/vlun.h | 82 -
include/uapi/scsi/cxlflash_ioctl.h | 276 --
.../filesystems/statmount/statmount_test.c | 13 +-
23 files changed, 7 insertions(+), 11508 deletions(-)
delete mode 100644 Documentation/arch/powerpc/cxlflash.rst
delete mode 100644 drivers/scsi/cxlflash/Kconfig
delete mode 100644 drivers/scsi/cxlflash/Makefile
delete mode 100644 drivers/scsi/cxlflash/backend.h
delete mode 100644 drivers/scsi/cxlflash/common.h
delete mode 100644 drivers/scsi/cxlflash/cxl_hw.c
delete mode 100644 drivers/scsi/cxlflash/lunmgt.c
delete mode 100644 drivers/scsi/cxlflash/main.c
delete mode 100644 drivers/scsi/cxlflash/main.h
delete mode 100644 drivers/scsi/cxlflash/ocxl_hw.c
delete mode 100644 drivers/scsi/cxlflash/ocxl_hw.h
delete mode 100644 drivers/scsi/cxlflash/sislite.h
delete mode 100644 drivers/scsi/cxlflash/superpipe.c
delete mode 100644 drivers/scsi/cxlflash/superpipe.h
delete mode 100644 drivers/scsi/cxlflash/vlun.c
delete mode 100644 drivers/scsi/cxlflash/vlun.h
delete mode 100644 include/uapi/scsi/cxlflash_ioctl.h
diff --git a/Documentation/arch/powerpc/cxlflash.rst b/Documentation/arch/powerpc/cxlflash.rst
deleted file mode 100644
index e8f488acfa41..000000000000
--- a/Documentation/arch/powerpc/cxlflash.rst
+++ /dev/null
@@ -1,433 +0,0 @@
-================================
-Coherent Accelerator (CXL) Flash
-================================
-
-Introduction
-============
-
- The IBM Power architecture provides support for CAPI (Coherent
- Accelerator Power Interface), which is available to certain PCIe slots
- on Power 8 systems. CAPI can be thought of as a special tunneling
- protocol through PCIe that allow PCIe adapters to look like special
- purpose co-processors which can read or write an application's
- memory and generate page faults. As a result, the host interface to
- an adapter running in CAPI mode does not require the data buffers to
- be mapped to the device's memory (IOMMU bypass) nor does it require
- memory to be pinned.
-
- On Linux, Coherent Accelerator (CXL) kernel services present CAPI
- devices as a PCI device by implementing a virtual PCI host bridge.
- This abstraction simplifies the infrastructure and programming
- model, allowing for drivers to look similar to other native PCI
- device drivers.
-
- CXL provides a mechanism by which user space applications can
- directly talk to a device (network or storage) bypassing the typical
- kernel/device driver stack. The CXL Flash Adapter Driver enables a
- user space application direct access to Flash storage.
-
- The CXL Flash Adapter Driver is a kernel module that sits in the
- SCSI stack as a low level device driver (below the SCSI disk and
- protocol drivers) for the IBM CXL Flash Adapter. This driver is
- responsible for the initialization of the adapter, setting up the
- special path for user space access, and performing error recovery. It
- communicates directly the Flash Accelerator Functional Unit (AFU)
- as described in Documentation/arch/powerpc/cxl.rst.
-
- The cxlflash driver supports two, mutually exclusive, modes of
- operation at the device (LUN) level:
-
- - Any flash device (LUN) can be configured to be accessed as a
- regular disk device (i.e.: /dev/sdc). This is the default mode.
-
- - Any flash device (LUN) can be configured to be accessed from
- user space with a special block library. This mode further
- specifies the means of accessing the device and provides for
- either raw access to the entire LUN (referred to as direct
- or physical LUN access) or access to a kernel/AFU-mediated
- partition of the LUN (referred to as virtual LUN access). The
- segmentation of a disk device into virtual LUNs is assisted
- by special translation services provided by the Flash AFU.
-
-Overview
-========
-
- The Coherent Accelerator Interface Architecture (CAIA) introduces a
- concept of a master context. A master typically has special privileges
- granted to it by the kernel or hypervisor allowing it to perform AFU
- wide management and control. The master may or may not be involved
- directly in each user I/O, but at the minimum is involved in the
- initial setup before the user application is allowed to send requests
- directly to the AFU.
-
- The CXL Flash Adapter Driver establishes a master context with the
- AFU. It uses memory mapped I/O (MMIO) for this control and setup. The
- Adapter Problem Space Memory Map looks like this::
-
- +-------------------------------+
- | 512 * 64 KB User MMIO |
- | (per context) |
- | User Accessible |
- +-------------------------------+
- | 512 * 128 B per context |
- | Provisioning and Control |
- | Trusted Process accessible |
- +-------------------------------+
- | 64 KB Global |
- | Trusted Process accessible |
- +-------------------------------+
-
- This driver configures itself into the SCSI software stack as an
- adapter driver. The driver is the only entity that is considered a
- Trusted Process to program the Provisioning and Control and Global
- areas in the MMIO Space shown above. The master context driver
- discovers all LUNs attached to the CXL Flash adapter and instantiates
- scsi block devices (/dev/sdb, /dev/sdc etc.) for each unique LUN
- seen from each path.
-
- Once these scsi block devices are instantiated, an application
- written to a specification provided by the block library may get
- access to the Flash from user space (without requiring a system call).
-
- This master context driver also provides a series of ioctls for this
- block library to enable this user space access. The driver supports
- two modes for accessing the block device.
-
- The first mode is called a virtual mode. In this mode a single scsi
- block device (/dev/sdb) may be carved up into any number of distinct
- virtual LUNs. The virtual LUNs may be resized as long as the sum of
- the sizes of all the virtual LUNs, along with the meta-data associated
- with it does not exceed the physical capacity.
-
- The second mode is called the physical mode. In this mode a single
- block device (/dev/sdb) may be opened directly by the block library
- and the entire space for the LUN is available to the application.
-
- Only the physical mode provides persistence of the data. i.e. The
- data written to the block device will survive application exit and
- restart and also reboot. The virtual LUNs do not persist (i.e. do
- not survive after the application terminates or the system reboots).
-
-
-Block library API
-=================
-
- Applications intending to get access to the CXL Flash from user
- space should use the block library, as it abstracts the details of
- interfacing directly with the cxlflash driver that are necessary for
- performing administrative actions (i.e.: setup, tear down, resize).
- The block library can be thought of as a 'user' of services,
- implemented as IOCTLs, that are provided by the cxlflash driver
- specifically for devices (LUNs) operating in user space access
- mode. While it is not a requirement that applications understand
- the interface between the block library and the cxlflash driver,
- a high-level overview of each supported service (IOCTL) is provided
- below.
-
- The block library can be found on GitHub:
- http://github.com/open-power/capiflash
-
-
-CXL Flash Driver LUN IOCTLs
-===========================
-
- Users, such as the block library, that wish to interface with a flash
- device (LUN) via user space access need to use the services provided
- by the cxlflash driver. As these services are implemented as ioctls,
- a file descriptor handle must first be obtained in order to establish
- the communication channel between a user and the kernel. This file
- descriptor is obtained by opening the device special file associated
- with the scsi disk device (/dev/sdb) that was created during LUN
- discovery. As per the location of the cxlflash driver within the
- SCSI protocol stack, this open is actually not seen by the cxlflash
- driver. Upon successful open, the user receives a file descriptor
- (herein referred to as fd1) that should be used for issuing the
- subsequent ioctls listed below.
-
- The structure definitions for these IOCTLs are available in:
- uapi/scsi/cxlflash_ioctl.h
-
-DK_CXLFLASH_ATTACH
-------------------
-
- This ioctl obtains, initializes, and starts a context using the CXL
- kernel services. These services specify a context id (u16) by which
- to uniquely identify the context and its allocated resources. The
- services additionally provide a second file descriptor (herein
- referred to as fd2) that is used by the block library to initiate
- memory mapped I/O (via mmap()) to the CXL flash device and poll for
- completion events. This file descriptor is intentionally installed by
- this driver and not the CXL kernel services to allow for intermediary
- notification and access in the event of a non-user-initiated close(),
- such as a killed process. This design point is described in further
- detail in the description for the DK_CXLFLASH_DETACH ioctl.
-
- There are a few important aspects regarding the "tokens" (context id
- and fd2) that are provided back to the user:
-
- - These tokens are only valid for the process under which they
- were created. The child of a forked process cannot continue
- to use the context id or file descriptor created by its parent
- (see DK_CXLFLASH_VLUN_CLONE for further details).
-
- - These tokens are only valid for the lifetime of the context and
- the process under which they were created. Once either is
- destroyed, the tokens are to be considered stale and subsequent
- usage will result in errors.
-
- - A valid adapter file descriptor (fd2 >= 0) is only returned on
- the initial attach for a context. Subsequent attaches to an
- existing context (DK_CXLFLASH_ATTACH_REUSE_CONTEXT flag present)
- do not provide the adapter file descriptor as it was previously
- made known to the application.
-
- - When a context is no longer needed, the user shall detach from
- the context via the DK_CXLFLASH_DETACH ioctl. When this ioctl
- returns with a valid adapter file descriptor and the return flag
- DK_CXLFLASH_APP_CLOSE_ADAP_FD is present, the application _must_
- close the adapter file descriptor following a successful detach.
-
- - When this ioctl returns with a valid fd2 and the return flag
- DK_CXLFLASH_APP_CLOSE_ADAP_FD is present, the application _must_
- close fd2 in the following circumstances:
-
- + Following a successful detach of the last user of the context
- + Following a successful recovery on the context's original fd2
- + In the child process of a fork(), following a clone ioctl,
- on the fd2 associated with the source context
-
- - At any time, a close on fd2 will invalidate the tokens. Applications
- should exercise caution to only close fd2 when appropriate (outlined
- in the previous bullet) to avoid premature loss of I/O.
-
-DK_CXLFLASH_USER_DIRECT
------------------------
- This ioctl is responsible for transitioning the LUN to direct
- (physical) mode access and configuring the AFU for direct access from
- user space on a per-context basis. Additionally, the block size and
- last logical block address (LBA) are returned to the user.
-
- As mentioned previously, when operating in user space access mode,
- LUNs may be accessed in whole or in part. Only one mode is allowed
- at a time and if one mode is active (outstanding references exist),
- requests to use the LUN in a different mode are denied.
-
- The AFU is configured for direct access from user space by adding an
- entry to the AFU's resource handle table. The index of the entry is
- treated as a resource handle that is returned to the user. The user
- is then able to use the handle to reference the LUN during I/O.
-
-DK_CXLFLASH_USER_VIRTUAL
-------------------------
- This ioctl is responsible for transitioning the LUN to virtual mode
- of access and configuring the AFU for virtual access from user space
- on a per-context basis. Additionally, the block size and last logical
- block address (LBA) are returned to the user.
-
- As mentioned previously, when operating in user space access mode,
- LUNs may be accessed in whole or in part. Only one mode is allowed
- at a time and if one mode is active (outstanding references exist),
- requests to use the LUN in a different mode are denied.
-
- The AFU is configured for virtual access from user space by adding
- an entry to the AFU's resource handle table. The index of the entry
- is treated as a resource handle that is returned to the user. The
- user is then able to use the handle to reference the LUN during I/O.
-
- By default, the virtual LUN is created with a size of 0. The user
- would need to use the DK_CXLFLASH_VLUN_RESIZE ioctl to adjust the grow
- the virtual LUN to a desired size. To avoid having to perform this
- resize for the initial creation of the virtual LUN, the user has the
- option of specifying a size as part of the DK_CXLFLASH_USER_VIRTUAL
- ioctl, such that when success is returned to the user, the
- resource handle that is provided is already referencing provisioned
- storage. This is reflected by the last LBA being a non-zero value.
-
- When a LUN is accessible from more than one port, this ioctl will
- return with the DK_CXLFLASH_ALL_PORTS_ACTIVE return flag set. This
- provides the user with a hint that I/O can be retried in the event
- of an I/O error as the LUN can be reached over multiple paths.
-
-DK_CXLFLASH_VLUN_RESIZE
------------------------
- This ioctl is responsible for resizing a previously created virtual
- LUN and will fail if invoked upon a LUN that is not in virtual
- mode. Upon success, an updated last LBA is returned to the user
- indicating the new size of the virtual LUN associated with the
- resource handle.
-
- The partitioning of virtual LUNs is jointly mediated by the cxlflash
- driver and the AFU. An allocation table is kept for each LUN that is
- operating in the virtual mode and used to program a LUN translation
- table that the AFU references when provided with a resource handle.
-
- This ioctl can return -EAGAIN if an AFU sync operation takes too long.
- In addition to returning a failure to user, cxlflash will also schedule
- an asynchronous AFU reset. Should the user choose to retry the operation,
- it is expected to succeed. If this ioctl fails with -EAGAIN, the user
- can either retry the operation or treat it as a failure.
-
-DK_CXLFLASH_RELEASE
--------------------
- This ioctl is responsible for releasing a previously obtained
- reference to either a physical or virtual LUN. This can be
- thought of as the inverse of the DK_CXLFLASH_USER_DIRECT or
- DK_CXLFLASH_USER_VIRTUAL ioctls. Upon success, the resource handle
- is no longer valid and the entry in the resource handle table is
- made available to be used again.
-
- As part of the release process for virtual LUNs, the virtual LUN
- is first resized to 0 to clear out and free the translation tables
- associated with the virtual LUN reference.
-
-DK_CXLFLASH_DETACH
-------------------
- This ioctl is responsible for unregistering a context with the
- cxlflash driver and release outstanding resources that were
- not explicitly released via the DK_CXLFLASH_RELEASE ioctl. Upon
- success, all "tokens" which had been provided to the user from the
- DK_CXLFLASH_ATTACH onward are no longer valid.
-
- When the DK_CXLFLASH_APP_CLOSE_ADAP_FD flag was returned on a successful
- attach, the application _must_ close the fd2 associated with the context
- following the detach of the final user of the context.
-
-DK_CXLFLASH_VLUN_CLONE
-----------------------
- This ioctl is responsible for cloning a previously created
- context to a more recently created context. It exists solely to
- support maintaining user space access to storage after a process
- forks. Upon success, the child process (which invoked the ioctl)
- will have access to the same LUNs via the same resource handle(s)
- as the parent, but under a different context.
-
- Context sharing across processes is not supported with CXL and
- therefore each fork must be met with establishing a new context
- for the child process. This ioctl simplifies the state management
- and playback required by a user in such a scenario. When a process
- forks, child process can clone the parents context by first creating
- a context (via DK_CXLFLASH_ATTACH) and then using this ioctl to
- perform the clone from the parent to the child.
-
- The clone itself is fairly simple. The resource handle and lun
- translation tables are copied from the parent context to the child's
- and then synced with the AFU.
-
- When the DK_CXLFLASH_APP_CLOSE_ADAP_FD flag was returned on a successful
- attach, the application _must_ close the fd2 associated with the source
- context (still resident/accessible in the parent process) following the
- clone. This is to avoid a stale entry in the file descriptor table of the
- child process.
-
- This ioctl can return -EAGAIN if an AFU sync operation takes too long.
- In addition to returning a failure to user, cxlflash will also schedule
- an asynchronous AFU reset. Should the user choose to retry the operation,
- it is expected to succeed. If this ioctl fails with -EAGAIN, the user
- can either retry the operation or treat it as a failure.
-
-DK_CXLFLASH_VERIFY
-------------------
- This ioctl is used to detect various changes such as the capacity of
- the disk changing, the number of LUNs visible changing, etc. In cases
- where the changes affect the application (such as a LUN resize), the
- cxlflash driver will report the changed state to the application.
-
- The user calls in when they want to validate that a LUN hasn't been
- changed in response to a check condition. As the user is operating out
- of band from the kernel, they will see these types of events without
- the kernel's knowledge. When encountered, the user's architected
- behavior is to call in to this ioctl, indicating what they want to
- verify and passing along any appropriate information. For now, only
- verifying a LUN change (ie: size different) with sense data is
- supported.
-
-DK_CXLFLASH_RECOVER_AFU
------------------------
- This ioctl is used to drive recovery (if such an action is warranted)
- of a specified user context. Any state associated with the user context
- is re-established upon successful recovery.
-
- User contexts are put into an error condition when the device needs to
- be reset or is terminating. Users are notified of this error condition
- by seeing all 0xF's on an MMIO read. Upon encountering this, the
- architected behavior for a user is to call into this ioctl to recover
- their context. A user may also call into this ioctl at any time to
- check if the device is operating normally. If a failure is returned
- from this ioctl, the user is expected to gracefully clean up their
- context via release/detach ioctls. Until they do, the context they
- hold is not relinquished. The user may also optionally exit the process
- at which time the context/resources they held will be freed as part of
- the release fop.
-
- When the DK_CXLFLASH_APP_CLOSE_ADAP_FD flag was returned on a successful
- attach, the application _must_ unmap and close the fd2 associated with the
- original context following this ioctl returning success and indicating that
- the context was recovered (DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET).
-
-DK_CXLFLASH_MANAGE_LUN
-----------------------
- This ioctl is used to switch a LUN from a mode where it is available
- for file-system access (legacy), to a mode where it is set aside for
- exclusive user space access (superpipe). In case a LUN is visible
- across multiple ports and adapters, this ioctl is used to uniquely
- identify each LUN by its World Wide Node Name (WWNN).
-
-
-CXL Flash Driver Host IOCTLs
-============================
-
- Each host adapter instance that is supported by the cxlflash driver
- has a special character device associated with it to enable a set of
- host management function. These character devices are hosted in a
- class dedicated for cxlflash and can be accessed via `/dev/cxlflash/*`.
-
- Applications can be written to perform various functions using the
- host ioctl APIs below.
-
- The structure definitions for these IOCTLs are available in:
- uapi/scsi/cxlflash_ioctl.h
-
-HT_CXLFLASH_LUN_PROVISION
--------------------------
- This ioctl is used to create and delete persistent LUNs on cxlflash
- devices that lack an external LUN management interface. It is only
- valid when used with AFUs that support the LUN provision capability.
-
- When sufficient space is available, LUNs can be created by specifying
- the target port to host the LUN and a desired size in 4K blocks. Upon
- success, the LUN ID and WWID of the created LUN will be returned and
- the SCSI bus can be scanned to detect the change in LUN topology. Note
- that partial allocations are not supported. Should a creation fail due
- to a space issue, the target port can be queried for its current LUN
- geometry.
-
- To remove a LUN, the device must first be disassociated from the Linux
- SCSI subsystem. The LUN deletion can then be initiated by specifying a
- target port and LUN ID. Upon success, the LUN geometry associated with
- the port will be updated to reflect new number of provisioned LUNs and
- available capacity.
-
- To query the LUN geometry of a port, the target port is specified and
- upon success, the following information is presented:
-
- - Maximum number of provisioned LUNs allowed for the port
- - Current number of provisioned LUNs for the port
- - Maximum total capacity of provisioned LUNs for the port (4K blocks)
- - Current total capacity of provisioned LUNs for the port (4K blocks)
-
- With this information, the number of available LUNs and capacity can be
- can be calculated.
-
-HT_CXLFLASH_AFU_DEBUG
----------------------
- This ioctl is used to debug AFUs by supporting a command pass-through
- interface. It is only valid when used with AFUs that support the AFU
- debug capability.
-
- With exception of buffer management, AFU debug commands are opaque to
- cxlflash and treated as pass-through. For debug commands that do require
- data transfer, the user supplies an adequately sized data buffer and must
- specify the data transfer direction with respect to the host. There is a
- maximum transfer size of 256K imposed. Note that partial read completions
- are not supported - when errors are experienced with a host read data
- transfer, the data buffer is not copied back to the user.
diff --git a/Documentation/arch/powerpc/index.rst b/Documentation/arch/powerpc/index.rst
index 9749f6dc258f..995268530f21 100644
--- a/Documentation/arch/powerpc/index.rst
+++ b/Documentation/arch/powerpc/index.rst
@@ -13,7 +13,6 @@ powerpc
cpu_families
cpu_features
cxl
- cxlflash
dawr-power9
dexcr
dscr
diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst
index 6d1465315df3..efe133c50615 100644
--- a/Documentation/userspace-api/ioctl/ioctl-number.rst
+++ b/Documentation/userspace-api/ioctl/ioctl-number.rst
@@ -373,7 +373,7 @@ Code Seq# Include File Comments
0xC0 00-0F linux/usb/iowarrior.h
0xCA 00-0F uapi/misc/cxl.h
0xCA 10-2F uapi/misc/ocxl.h
-0xCA 80-BF uapi/scsi/cxlflash_ioctl.h
+0xCA 80-BF uapi/scsi/cxlflash_ioctl.h Dead since 6.14
0xCB 00-1F CBM serial IEC bus in development:
<mailto:michael.klein@xxxxxxxxxxxxxxxxxxxx>
0xCC 00-0F drivers/misc/ibmvmc.h pseries VMC driver
diff --git a/MAINTAINERS b/MAINTAINERS
index 896a307fa065..f1171fe71e4e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6318,15 +6318,6 @@ F: drivers/misc/cxl/
F: include/misc/cxl*
F: include/uapi/misc/cxl.h
-CXLFLASH (IBM Coherent Accelerator Processor Interface CAPI Flash) SCSI DRIVER
-M: Manoj N. Kumar <manoj@xxxxxxxxxxxxx>
-M: Uma Krishnan <ukrishn@xxxxxxxxxxxxx>
-L: linux-scsi@xxxxxxxxxxxxxxx
-S: Obsolete
-F: Documentation/arch/powerpc/cxlflash.rst
-F: drivers/scsi/cxlflash/
-F: include/uapi/scsi/cxlflash_ioctl.h
-
CYBERPRO FB DRIVER
M: Russell King <linux@xxxxxxxxxxxxxxx>
L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers)
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 37c24ffea65c..c749d376159a 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -336,7 +336,6 @@ source "drivers/scsi/cxgbi/Kconfig"
source "drivers/scsi/bnx2i/Kconfig"
source "drivers/scsi/bnx2fc/Kconfig"
source "drivers/scsi/be2iscsi/Kconfig"
-source "drivers/scsi/cxlflash/Kconfig"
config SGIWD93_SCSI
tristate "SGI WD93C93 SCSI Driver"
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 1313ddf2fd1a..16de3e41f94c 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -96,7 +96,6 @@ obj-$(CONFIG_SCSI_SYM53C8XX_2) += sym53c8xx_2/
obj-$(CONFIG_SCSI_ZALON) += zalon7xx.o
obj-$(CONFIG_SCSI_DC395x) += dc395x.o
obj-$(CONFIG_SCSI_AM53C974) += esp_scsi.o am53c974.o
-obj-$(CONFIG_CXLFLASH) += cxlflash/
obj-$(CONFIG_MEGARAID_LEGACY) += megaraid.o
obj-$(CONFIG_MEGARAID_NEWGEN) += megaraid/
obj-$(CONFIG_MEGARAID_SAS) += megaraid/
diff --git a/drivers/scsi/cxlflash/Kconfig b/drivers/scsi/cxlflash/Kconfig
deleted file mode 100644
index c424d36e89a6..000000000000
--- a/drivers/scsi/cxlflash/Kconfig
+++ /dev/null
@@ -1,15 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# IBM CXL-attached Flash Accelerator SCSI Driver
-#
-
-config CXLFLASH
- tristate "Support for IBM CAPI Flash (DEPRECATED)"
- depends on PCI && SCSI && (CXL || OCXL) && EEH
- select IRQ_POLL
- help
- The cxlflash driver is deprecated and will be removed in a future
- kernel release.
-
- Allows CAPI Accelerated IO to Flash
- If unsure, say N.
diff --git a/drivers/scsi/cxlflash/Makefile b/drivers/scsi/cxlflash/Makefile
deleted file mode 100644
index fd2f0dd9daf9..000000000000
--- a/drivers/scsi/cxlflash/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_CXLFLASH) += cxlflash.o
-cxlflash-y += main.o superpipe.o lunmgt.o vlun.o
-cxlflash-$(CONFIG_CXL) += cxl_hw.o
-cxlflash-$(CONFIG_OCXL) += ocxl_hw.o
diff --git a/drivers/scsi/cxlflash/backend.h b/drivers/scsi/cxlflash/backend.h
deleted file mode 100644
index 181e0445ed42..000000000000
--- a/drivers/scsi/cxlflash/backend.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Uma Krishnan <ukrishn@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2018 IBM Corporation
- */
-
-#ifndef _CXLFLASH_BACKEND_H
-#define _CXLFLASH_BACKEND_H
-
-extern const struct cxlflash_backend_ops cxlflash_cxl_ops;
-extern const struct cxlflash_backend_ops cxlflash_ocxl_ops;
-
-struct cxlflash_backend_ops {
- struct module *module;
- void __iomem * (*psa_map)(void *ctx_cookie);
- void (*psa_unmap)(void __iomem *addr);
- int (*process_element)(void *ctx_cookie);
- int (*map_afu_irq)(void *ctx_cookie, int num, irq_handler_t handler,
- void *cookie, char *name);
- void (*unmap_afu_irq)(void *ctx_cookie, int num, void *cookie);
- u64 (*get_irq_objhndl)(void *ctx_cookie, int irq);
- int (*start_context)(void *ctx_cookie);
- int (*stop_context)(void *ctx_cookie);
- int (*afu_reset)(void *ctx_cookie);
- void (*set_master)(void *ctx_cookie);
- void * (*get_context)(struct pci_dev *dev, void *afu_cookie);
- void * (*dev_context_init)(struct pci_dev *dev, void *afu_cookie);
- int (*release_context)(void *ctx_cookie);
- void (*perst_reloads_same_image)(void *afu_cookie, bool image);
- ssize_t (*read_adapter_vpd)(struct pci_dev *dev, void *buf,
- size_t count);
- int (*allocate_afu_irqs)(void *ctx_cookie, int num);
- void (*free_afu_irqs)(void *ctx_cookie);
- void * (*create_afu)(struct pci_dev *dev);
- void (*destroy_afu)(void *afu_cookie);
- struct file * (*get_fd)(void *ctx_cookie, struct file_operations *fops,
- int *fd);
- void * (*fops_get_context)(struct file *file);
- int (*start_work)(void *ctx_cookie, u64 irqs);
- int (*fd_mmap)(struct file *file, struct vm_area_struct *vm);
- int (*fd_release)(struct inode *inode, struct file *file);
-};
-
-#endif /* _CXLFLASH_BACKEND_H */
diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h
deleted file mode 100644
index de6229e27b48..000000000000
--- a/drivers/scsi/cxlflash/common.h
+++ /dev/null
@@ -1,340 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#ifndef _CXLFLASH_COMMON_H
-#define _CXLFLASH_COMMON_H
-
-#include <linux/async.h>
-#include <linux/cdev.h>
-#include <linux/irq_poll.h>
-#include <linux/list.h>
-#include <linux/rwsem.h>
-#include <linux/types.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-
-#include "backend.h"
-
-extern const struct file_operations cxlflash_cxl_fops;
-
-#define MAX_CONTEXT CXLFLASH_MAX_CONTEXT /* num contexts per afu */
-#define MAX_FC_PORTS CXLFLASH_MAX_FC_PORTS /* max ports per AFU */
-#define LEGACY_FC_PORTS 2 /* legacy ports per AFU */
-
-#define CHAN2PORTBANK(_x) ((_x) >> ilog2(CXLFLASH_NUM_FC_PORTS_PER_BANK))
-#define CHAN2BANKPORT(_x) ((_x) & (CXLFLASH_NUM_FC_PORTS_PER_BANK - 1))
-
-#define CHAN2PORTMASK(_x) (1 << (_x)) /* channel to port mask */
-#define PORTMASK2CHAN(_x) (ilog2((_x))) /* port mask to channel */
-#define PORTNUM2CHAN(_x) ((_x) - 1) /* port number to channel */
-
-#define CXLFLASH_BLOCK_SIZE 4096 /* 4K blocks */
-#define CXLFLASH_MAX_XFER_SIZE 16777216 /* 16MB transfer */
-#define CXLFLASH_MAX_SECTORS (CXLFLASH_MAX_XFER_SIZE/512) /* SCSI wants
- * max_sectors
- * in units of
- * 512 byte
- * sectors
- */
-
-#define MAX_RHT_PER_CONTEXT (PAGE_SIZE / sizeof(struct sisl_rht_entry))
-
-/* AFU command retry limit */
-#define MC_RETRY_CNT 5 /* Sufficient for SCSI and certain AFU errors */
-
-/* Command management definitions */
-#define CXLFLASH_MAX_CMDS 256
-#define CXLFLASH_MAX_CMDS_PER_LUN CXLFLASH_MAX_CMDS
-
-/* RRQ for master issued cmds */
-#define NUM_RRQ_ENTRY CXLFLASH_MAX_CMDS
-
-/* SQ for master issued cmds */
-#define NUM_SQ_ENTRY CXLFLASH_MAX_CMDS
-
-/* Hardware queue definitions */
-#define CXLFLASH_DEF_HWQS 1
-#define CXLFLASH_MAX_HWQS 8
-#define PRIMARY_HWQ 0
-
-
-static inline void check_sizes(void)
-{
- BUILD_BUG_ON_NOT_POWER_OF_2(CXLFLASH_NUM_FC_PORTS_PER_BANK);
- BUILD_BUG_ON_NOT_POWER_OF_2(CXLFLASH_MAX_CMDS);
-}
-
-/* AFU defines a fixed size of 4K for command buffers (borrow 4K page define) */
-#define CMD_BUFSIZE SIZE_4K
-
-enum cxlflash_lr_state {
- LINK_RESET_INVALID,
- LINK_RESET_REQUIRED,
- LINK_RESET_COMPLETE
-};
-
-enum cxlflash_init_state {
- INIT_STATE_NONE,
- INIT_STATE_PCI,
- INIT_STATE_AFU,
- INIT_STATE_SCSI,
- INIT_STATE_CDEV
-};
-
-enum cxlflash_state {
- STATE_PROBING, /* Initial state during probe */
- STATE_PROBED, /* Temporary state, probe completed but EEH occurred */
- STATE_NORMAL, /* Normal running state, everything good */
- STATE_RESET, /* Reset state, trying to reset/recover */
- STATE_FAILTERM /* Failed/terminating state, error out users/threads */
-};
-
-enum cxlflash_hwq_mode {
- HWQ_MODE_RR, /* Roundrobin (default) */
- HWQ_MODE_TAG, /* Distribute based on block MQ tag */
- HWQ_MODE_CPU, /* CPU affinity */
- MAX_HWQ_MODE
-};
-
-/*
- * Each context has its own set of resource handles that is visible
- * only from that context.
- */
-
-struct cxlflash_cfg {
- struct afu *afu;
-
- const struct cxlflash_backend_ops *ops;
- struct pci_dev *dev;
- struct pci_device_id *dev_id;
- struct Scsi_Host *host;
- int num_fc_ports;
- struct cdev cdev;
- struct device *chardev;
-
- ulong cxlflash_regs_pci;
-
- struct work_struct work_q;
- enum cxlflash_init_state init_state;
- enum cxlflash_lr_state lr_state;
- int lr_port;
- atomic_t scan_host_needed;
-
- void *afu_cookie;
-
- atomic_t recovery_threads;
- struct mutex ctx_recovery_mutex;
- struct mutex ctx_tbl_list_mutex;
- struct rw_semaphore ioctl_rwsem;
- struct ctx_info *ctx_tbl[MAX_CONTEXT];
- struct list_head ctx_err_recovery; /* contexts w/ recovery pending */
- struct file_operations cxl_fops;
-
- /* Parameters that are LUN table related */
- int last_lun_index[MAX_FC_PORTS];
- int promote_lun_index;
- struct list_head lluns; /* list of llun_info structs */
-
- wait_queue_head_t tmf_waitq;
- spinlock_t tmf_slock;
- bool tmf_active;
- bool ws_unmap; /* Write-same unmap supported */
- wait_queue_head_t reset_waitq;
- enum cxlflash_state state;
- async_cookie_t async_reset_cookie;
-};
-
-struct afu_cmd {
- struct sisl_ioarcb rcb; /* IOARCB (cache line aligned) */
- struct sisl_ioasa sa; /* IOASA must follow IOARCB */
- struct afu *parent;
- struct scsi_cmnd *scp;
- struct completion cevent;
- struct list_head queue;
- u32 hwq_index;
-
- u8 cmd_tmf:1,
- cmd_aborted:1;
-
- struct list_head list; /* Pending commands link */
-
- /* As per the SISLITE spec the IOARCB EA has to be 16-byte aligned.
- * However for performance reasons the IOARCB/IOASA should be
- * cache line aligned.
- */
-} __aligned(cache_line_size());
-
-static inline struct afu_cmd *sc_to_afuc(struct scsi_cmnd *sc)
-{
- return PTR_ALIGN(scsi_cmd_priv(sc), __alignof__(struct afu_cmd));
-}
-
-static inline struct afu_cmd *sc_to_afuci(struct scsi_cmnd *sc)
-{
- struct afu_cmd *afuc = sc_to_afuc(sc);
-
- INIT_LIST_HEAD(&afuc->queue);
- return afuc;
-}
-
-static inline struct afu_cmd *sc_to_afucz(struct scsi_cmnd *sc)
-{
- struct afu_cmd *afuc = sc_to_afuc(sc);
-
- memset(afuc, 0, sizeof(*afuc));
- return sc_to_afuci(sc);
-}
-
-struct hwq {
- /* Stuff requiring alignment go first. */
- struct sisl_ioarcb sq[NUM_SQ_ENTRY]; /* 16K SQ */
- u64 rrq_entry[NUM_RRQ_ENTRY]; /* 2K RRQ */
-
- /* Beware of alignment till here. Preferably introduce new
- * fields after this point
- */
- struct afu *afu;
- void *ctx_cookie;
- struct sisl_host_map __iomem *host_map; /* MC host map */
- struct sisl_ctrl_map __iomem *ctrl_map; /* MC control map */
- ctx_hndl_t ctx_hndl; /* master's context handle */
- u32 index; /* Index of this hwq */
- int num_irqs; /* Number of interrupts requested for context */
- struct list_head pending_cmds; /* Commands pending completion */
-
- atomic_t hsq_credits;
- spinlock_t hsq_slock; /* Hardware send queue lock */
- struct sisl_ioarcb *hsq_start;
- struct sisl_ioarcb *hsq_end;
- struct sisl_ioarcb *hsq_curr;
- spinlock_t hrrq_slock;
- u64 *hrrq_start;
- u64 *hrrq_end;
- u64 *hrrq_curr;
- bool toggle;
- bool hrrq_online;
-
- s64 room;
-
- struct irq_poll irqpoll;
-} __aligned(cache_line_size());
-
-struct afu {
- struct hwq hwqs[CXLFLASH_MAX_HWQS];
- int (*send_cmd)(struct afu *afu, struct afu_cmd *cmd);
- int (*context_reset)(struct hwq *hwq);
-
- /* AFU HW */
- struct cxlflash_afu_map __iomem *afu_map; /* entire MMIO map */
-
- atomic_t cmds_active; /* Number of currently active AFU commands */
- struct mutex sync_active; /* Mutex to serialize AFU commands */
- u64 hb;
- u32 internal_lun; /* User-desired LUN mode for this AFU */
-
- u32 num_hwqs; /* Number of hardware queues */
- u32 desired_hwqs; /* Desired h/w queues, effective on AFU reset */
- enum cxlflash_hwq_mode hwq_mode; /* Steering mode for h/w queues */
- u32 hwq_rr_count; /* Count to distribute traffic for roundrobin */
-
- char version[16];
- u64 interface_version;
-
- u32 irqpoll_weight;
- struct cxlflash_cfg *parent; /* Pointer back to parent cxlflash_cfg */
-};
-
-static inline struct hwq *get_hwq(struct afu *afu, u32 index)
-{
- WARN_ON(index >= CXLFLASH_MAX_HWQS);
-
- return &afu->hwqs[index];
-}
-
-static inline bool afu_is_irqpoll_enabled(struct afu *afu)
-{
- return !!afu->irqpoll_weight;
-}
-
-static inline bool afu_has_cap(struct afu *afu, u64 cap)
-{
- u64 afu_cap = afu->interface_version >> SISL_INTVER_CAP_SHIFT;
-
- return afu_cap & cap;
-}
-
-static inline bool afu_is_ocxl_lisn(struct afu *afu)
-{
- return afu_has_cap(afu, SISL_INTVER_CAP_OCXL_LISN);
-}
-
-static inline bool afu_is_afu_debug(struct afu *afu)
-{
- return afu_has_cap(afu, SISL_INTVER_CAP_AFU_DEBUG);
-}
-
-static inline bool afu_is_lun_provision(struct afu *afu)
-{
- return afu_has_cap(afu, SISL_INTVER_CAP_LUN_PROVISION);
-}
-
-static inline bool afu_is_sq_cmd_mode(struct afu *afu)
-{
- return afu_has_cap(afu, SISL_INTVER_CAP_SQ_CMD_MODE);
-}
-
-static inline bool afu_is_ioarrin_cmd_mode(struct afu *afu)
-{
- return afu_has_cap(afu, SISL_INTVER_CAP_IOARRIN_CMD_MODE);
-}
-
-static inline u64 lun_to_lunid(u64 lun)
-{
- __be64 lun_id;
-
- int_to_scsilun(lun, (struct scsi_lun *)&lun_id);
- return be64_to_cpu(lun_id);
-}
-
-static inline struct fc_port_bank __iomem *get_fc_port_bank(
- struct cxlflash_cfg *cfg, int i)
-{
- struct afu *afu = cfg->afu;
-
- return &afu->afu_map->global.bank[CHAN2PORTBANK(i)];
-}
-
-static inline __be64 __iomem *get_fc_port_regs(struct cxlflash_cfg *cfg, int i)
-{
- struct fc_port_bank __iomem *fcpb = get_fc_port_bank(cfg, i);
-
- return &fcpb->fc_port_regs[CHAN2BANKPORT(i)][0];
-}
-
-static inline __be64 __iomem *get_fc_port_luns(struct cxlflash_cfg *cfg, int i)
-{
- struct fc_port_bank __iomem *fcpb = get_fc_port_bank(cfg, i);
-
- return &fcpb->fc_port_luns[CHAN2BANKPORT(i)][0];
-}
-
-int cxlflash_afu_sync(struct afu *afu, ctx_hndl_t c, res_hndl_t r, u8 mode);
-void cxlflash_list_init(void);
-void cxlflash_term_global_luns(void);
-void cxlflash_free_errpage(void);
-int cxlflash_ioctl(struct scsi_device *sdev, unsigned int cmd,
- void __user *arg);
-void cxlflash_stop_term_user_contexts(struct cxlflash_cfg *cfg);
-int cxlflash_mark_contexts_error(struct cxlflash_cfg *cfg);
-void cxlflash_term_local_luns(struct cxlflash_cfg *cfg);
-void cxlflash_restore_luntable(struct cxlflash_cfg *cfg);
-
-#endif /* ifndef _CXLFLASH_COMMON_H */
diff --git a/drivers/scsi/cxlflash/cxl_hw.c b/drivers/scsi/cxlflash/cxl_hw.c
deleted file mode 100644
index b814130f3f5c..000000000000
--- a/drivers/scsi/cxlflash/cxl_hw.c
+++ /dev/null
@@ -1,177 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * CXL Flash Device Driver
- *
- * Written by: Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Uma Krishnan <ukrishn@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2018 IBM Corporation
- */
-
-#include <misc/cxl.h>
-
-#include "backend.h"
-
-/*
- * The following routines map the cxlflash backend operations to existing CXL
- * kernel API function and are largely simple shims that provide an abstraction
- * for converting generic context and AFU cookies into cxl_context or cxl_afu
- * pointers.
- */
-
-static void __iomem *cxlflash_psa_map(void *ctx_cookie)
-{
- return cxl_psa_map(ctx_cookie);
-}
-
-static void cxlflash_psa_unmap(void __iomem *addr)
-{
- cxl_psa_unmap(addr);
-}
-
-static int cxlflash_process_element(void *ctx_cookie)
-{
- return cxl_process_element(ctx_cookie);
-}
-
-static int cxlflash_map_afu_irq(void *ctx_cookie, int num,
- irq_handler_t handler, void *cookie, char *name)
-{
- return cxl_map_afu_irq(ctx_cookie, num, handler, cookie, name);
-}
-
-static void cxlflash_unmap_afu_irq(void *ctx_cookie, int num, void *cookie)
-{
- cxl_unmap_afu_irq(ctx_cookie, num, cookie);
-}
-
-static u64 cxlflash_get_irq_objhndl(void *ctx_cookie, int irq)
-{
- /* Dummy fop for cxl */
- return 0;
-}
-
-static int cxlflash_start_context(void *ctx_cookie)
-{
- return cxl_start_context(ctx_cookie, 0, NULL);
-}
-
-static int cxlflash_stop_context(void *ctx_cookie)
-{
- return cxl_stop_context(ctx_cookie);
-}
-
-static int cxlflash_afu_reset(void *ctx_cookie)
-{
- return cxl_afu_reset(ctx_cookie);
-}
-
-static void cxlflash_set_master(void *ctx_cookie)
-{
- cxl_set_master(ctx_cookie);
-}
-
-static void *cxlflash_get_context(struct pci_dev *dev, void *afu_cookie)
-{
- return cxl_get_context(dev);
-}
-
-static void *cxlflash_dev_context_init(struct pci_dev *dev, void *afu_cookie)
-{
- return cxl_dev_context_init(dev);
-}
-
-static int cxlflash_release_context(void *ctx_cookie)
-{
- return cxl_release_context(ctx_cookie);
-}
-
-static void cxlflash_perst_reloads_same_image(void *afu_cookie, bool image)
-{
- cxl_perst_reloads_same_image(afu_cookie, image);
-}
-
-static ssize_t cxlflash_read_adapter_vpd(struct pci_dev *dev,
- void *buf, size_t count)
-{
- return cxl_read_adapter_vpd(dev, buf, count);
-}
-
-static int cxlflash_allocate_afu_irqs(void *ctx_cookie, int num)
-{
- return cxl_allocate_afu_irqs(ctx_cookie, num);
-}
-
-static void cxlflash_free_afu_irqs(void *ctx_cookie)
-{
- cxl_free_afu_irqs(ctx_cookie);
-}
-
-static void *cxlflash_create_afu(struct pci_dev *dev)
-{
- return cxl_pci_to_afu(dev);
-}
-
-static void cxlflash_destroy_afu(void *afu)
-{
- /* Dummy fop for cxl */
-}
-
-static struct file *cxlflash_get_fd(void *ctx_cookie,
- struct file_operations *fops, int *fd)
-{
- return cxl_get_fd(ctx_cookie, fops, fd);
-}
-
-static void *cxlflash_fops_get_context(struct file *file)
-{
- return cxl_fops_get_context(file);
-}
-
-static int cxlflash_start_work(void *ctx_cookie, u64 irqs)
-{
- struct cxl_ioctl_start_work work = { 0 };
-
- work.num_interrupts = irqs;
- work.flags = CXL_START_WORK_NUM_IRQS;
-
- return cxl_start_work(ctx_cookie, &work);
-}
-
-static int cxlflash_fd_mmap(struct file *file, struct vm_area_struct *vm)
-{
- return cxl_fd_mmap(file, vm);
-}
-
-static int cxlflash_fd_release(struct inode *inode, struct file *file)
-{
- return cxl_fd_release(inode, file);
-}
-
-const struct cxlflash_backend_ops cxlflash_cxl_ops = {
- .module = THIS_MODULE,
- .psa_map = cxlflash_psa_map,
- .psa_unmap = cxlflash_psa_unmap,
- .process_element = cxlflash_process_element,
- .map_afu_irq = cxlflash_map_afu_irq,
- .unmap_afu_irq = cxlflash_unmap_afu_irq,
- .get_irq_objhndl = cxlflash_get_irq_objhndl,
- .start_context = cxlflash_start_context,
- .stop_context = cxlflash_stop_context,
- .afu_reset = cxlflash_afu_reset,
- .set_master = cxlflash_set_master,
- .get_context = cxlflash_get_context,
- .dev_context_init = cxlflash_dev_context_init,
- .release_context = cxlflash_release_context,
- .perst_reloads_same_image = cxlflash_perst_reloads_same_image,
- .read_adapter_vpd = cxlflash_read_adapter_vpd,
- .allocate_afu_irqs = cxlflash_allocate_afu_irqs,
- .free_afu_irqs = cxlflash_free_afu_irqs,
- .create_afu = cxlflash_create_afu,
- .destroy_afu = cxlflash_destroy_afu,
- .get_fd = cxlflash_get_fd,
- .fops_get_context = cxlflash_fops_get_context,
- .start_work = cxlflash_start_work,
- .fd_mmap = cxlflash_fd_mmap,
- .fd_release = cxlflash_fd_release,
-};
diff --git a/drivers/scsi/cxlflash/lunmgt.c b/drivers/scsi/cxlflash/lunmgt.c
deleted file mode 100644
index 962c797fda07..000000000000
--- a/drivers/scsi/cxlflash/lunmgt.c
+++ /dev/null
@@ -1,278 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#include <linux/unaligned.h>
-
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-
-#include <scsi/scsi_host.h>
-#include <uapi/scsi/cxlflash_ioctl.h>
-
-#include "sislite.h"
-#include "common.h"
-#include "vlun.h"
-#include "superpipe.h"
-
-/**
- * create_local() - allocate and initialize a local LUN information structure
- * @sdev: SCSI device associated with LUN.
- * @wwid: World Wide Node Name for LUN.
- *
- * Return: Allocated local llun_info structure on success, NULL on failure
- */
-static struct llun_info *create_local(struct scsi_device *sdev, u8 *wwid)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = NULL;
-
- lli = kzalloc(sizeof(*lli), GFP_KERNEL);
- if (unlikely(!lli)) {
- dev_err(dev, "%s: could not allocate lli\n", __func__);
- goto out;
- }
-
- lli->sdev = sdev;
- lli->host_no = sdev->host->host_no;
- lli->in_table = false;
-
- memcpy(lli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN);
-out:
- return lli;
-}
-
-/**
- * create_global() - allocate and initialize a global LUN information structure
- * @sdev: SCSI device associated with LUN.
- * @wwid: World Wide Node Name for LUN.
- *
- * Return: Allocated global glun_info structure on success, NULL on failure
- */
-static struct glun_info *create_global(struct scsi_device *sdev, u8 *wwid)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct glun_info *gli = NULL;
-
- gli = kzalloc(sizeof(*gli), GFP_KERNEL);
- if (unlikely(!gli)) {
- dev_err(dev, "%s: could not allocate gli\n", __func__);
- goto out;
- }
-
- mutex_init(&gli->mutex);
- memcpy(gli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN);
-out:
- return gli;
-}
-
-/**
- * lookup_local() - find a local LUN information structure by WWID
- * @cfg: Internal structure associated with the host.
- * @wwid: WWID associated with LUN.
- *
- * Return: Found local lun_info structure on success, NULL on failure
- */
-static struct llun_info *lookup_local(struct cxlflash_cfg *cfg, u8 *wwid)
-{
- struct llun_info *lli, *temp;
-
- list_for_each_entry_safe(lli, temp, &cfg->lluns, list)
- if (!memcmp(lli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN))
- return lli;
-
- return NULL;
-}
-
-/**
- * lookup_global() - find a global LUN information structure by WWID
- * @wwid: WWID associated with LUN.
- *
- * Return: Found global lun_info structure on success, NULL on failure
- */
-static struct glun_info *lookup_global(u8 *wwid)
-{
- struct glun_info *gli, *temp;
-
- list_for_each_entry_safe(gli, temp, &global.gluns, list)
- if (!memcmp(gli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN))
- return gli;
-
- return NULL;
-}
-
-/**
- * find_and_create_lun() - find or create a local LUN information structure
- * @sdev: SCSI device associated with LUN.
- * @wwid: WWID associated with LUN.
- *
- * The LUN is kept both in a local list (per adapter) and in a global list
- * (across all adapters). Certain attributes of the LUN are local to the
- * adapter (such as index, port selection mask, etc.).
- *
- * The block allocation map is shared across all adapters (i.e. associated
- * wih the global list). Since different attributes are associated with
- * the per adapter and global entries, allocate two separate structures for each
- * LUN (one local, one global).
- *
- * Keep a pointer back from the local to the global entry.
- *
- * This routine assumes the caller holds the global mutex.
- *
- * Return: Found/Allocated local lun_info structure on success, NULL on failure
- */
-static struct llun_info *find_and_create_lun(struct scsi_device *sdev, u8 *wwid)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = NULL;
- struct glun_info *gli = NULL;
-
- if (unlikely(!wwid))
- goto out;
-
- lli = lookup_local(cfg, wwid);
- if (lli)
- goto out;
-
- lli = create_local(sdev, wwid);
- if (unlikely(!lli))
- goto out;
-
- gli = lookup_global(wwid);
- if (gli) {
- lli->parent = gli;
- list_add(&lli->list, &cfg->lluns);
- goto out;
- }
-
- gli = create_global(sdev, wwid);
- if (unlikely(!gli)) {
- kfree(lli);
- lli = NULL;
- goto out;
- }
-
- lli->parent = gli;
- list_add(&lli->list, &cfg->lluns);
-
- list_add(&gli->list, &global.gluns);
-
-out:
- dev_dbg(dev, "%s: returning lli=%p, gli=%p\n", __func__, lli, gli);
- return lli;
-}
-
-/**
- * cxlflash_term_local_luns() - Delete all entries from local LUN list, free.
- * @cfg: Internal structure associated with the host.
- */
-void cxlflash_term_local_luns(struct cxlflash_cfg *cfg)
-{
- struct llun_info *lli, *temp;
-
- mutex_lock(&global.mutex);
- list_for_each_entry_safe(lli, temp, &cfg->lluns, list) {
- list_del(&lli->list);
- kfree(lli);
- }
- mutex_unlock(&global.mutex);
-}
-
-/**
- * cxlflash_list_init() - initializes the global LUN list
- */
-void cxlflash_list_init(void)
-{
- INIT_LIST_HEAD(&global.gluns);
- mutex_init(&global.mutex);
- global.err_page = NULL;
-}
-
-/**
- * cxlflash_term_global_luns() - frees resources associated with global LUN list
- */
-void cxlflash_term_global_luns(void)
-{
- struct glun_info *gli, *temp;
-
- mutex_lock(&global.mutex);
- list_for_each_entry_safe(gli, temp, &global.gluns, list) {
- list_del(&gli->list);
- cxlflash_ba_terminate(&gli->blka.ba_lun);
- kfree(gli);
- }
- mutex_unlock(&global.mutex);
-}
-
-/**
- * cxlflash_manage_lun() - handles LUN management activities
- * @sdev: SCSI device associated with LUN.
- * @arg: Manage ioctl data structure.
- *
- * This routine is used to notify the driver about a LUN's WWID and associate
- * SCSI devices (sdev) with a global LUN instance. Additionally it serves to
- * change a LUN's operating mode: legacy or superpipe.
- *
- * Return: 0 on success, -errno on failure
- */
-int cxlflash_manage_lun(struct scsi_device *sdev, void *arg)
-{
- struct dk_cxlflash_manage_lun *manage = arg;
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = NULL;
- int rc = 0;
- u64 flags = manage->hdr.flags;
- u32 chan = sdev->channel;
-
- mutex_lock(&global.mutex);
- lli = find_and_create_lun(sdev, manage->wwid);
- dev_dbg(dev, "%s: WWID=%016llx%016llx, flags=%016llx lli=%p\n",
- __func__, get_unaligned_be64(&manage->wwid[0]),
- get_unaligned_be64(&manage->wwid[8]), manage->hdr.flags, lli);
- if (unlikely(!lli)) {
- rc = -ENOMEM;
- goto out;
- }
-
- if (flags & DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE) {
- /*
- * Update port selection mask based upon channel, store off LUN
- * in unpacked, AFU-friendly format, and hang LUN reference in
- * the sdev.
- */
- lli->port_sel |= CHAN2PORTMASK(chan);
- lli->lun_id[chan] = lun_to_lunid(sdev->lun);
- sdev->hostdata = lli;
- } else if (flags & DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE) {
- if (lli->parent->mode != MODE_NONE)
- rc = -EBUSY;
- else {
- /*
- * Clean up local LUN for this port and reset table
- * tracking when no more references exist.
- */
- sdev->hostdata = NULL;
- lli->port_sel &= ~CHAN2PORTMASK(chan);
- if (lli->port_sel == 0U)
- lli->in_table = false;
- }
- }
-
- dev_dbg(dev, "%s: port_sel=%08x chan=%u lun_id=%016llx\n",
- __func__, lli->port_sel, chan, lli->lun_id[chan]);
-
-out:
- mutex_unlock(&global.mutex);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
deleted file mode 100644
index ae626e389c8b..000000000000
--- a/drivers/scsi/cxlflash/main.c
+++ /dev/null
@@ -1,3970 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#include <linux/delay.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-
-#include <linux/unaligned.h>
-
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_host.h>
-#include <uapi/scsi/cxlflash_ioctl.h>
-
-#include "main.h"
-#include "sislite.h"
-#include "common.h"
-
-MODULE_DESCRIPTION(CXLFLASH_ADAPTER_NAME);
-MODULE_AUTHOR("Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>");
-MODULE_AUTHOR("Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>");
-MODULE_LICENSE("GPL");
-
-static char *cxlflash_devnode(const struct device *dev, umode_t *mode);
-static const struct class cxlflash_class = {
- .name = "cxlflash",
- .devnode = cxlflash_devnode,
-};
-
-static u32 cxlflash_major;
-static DECLARE_BITMAP(cxlflash_minor, CXLFLASH_MAX_ADAPTERS);
-
-/**
- * process_cmd_err() - command error handler
- * @cmd: AFU command that experienced the error.
- * @scp: SCSI command associated with the AFU command in error.
- *
- * Translates error bits from AFU command to SCSI command results.
- */
-static void process_cmd_err(struct afu_cmd *cmd, struct scsi_cmnd *scp)
-{
- struct afu *afu = cmd->parent;
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- struct sisl_ioasa *ioasa;
- u32 resid;
-
- ioasa = &(cmd->sa);
-
- if (ioasa->rc.flags & SISL_RC_FLAGS_UNDERRUN) {
- resid = ioasa->resid;
- scsi_set_resid(scp, resid);
- dev_dbg(dev, "%s: cmd underrun cmd = %p scp = %p, resid = %d\n",
- __func__, cmd, scp, resid);
- }
-
- if (ioasa->rc.flags & SISL_RC_FLAGS_OVERRUN) {
- dev_dbg(dev, "%s: cmd underrun cmd = %p scp = %p\n",
- __func__, cmd, scp);
- scp->result = (DID_ERROR << 16);
- }
-
- dev_dbg(dev, "%s: cmd failed afu_rc=%02x scsi_rc=%02x fc_rc=%02x "
- "afu_extra=%02x scsi_extra=%02x fc_extra=%02x\n", __func__,
- ioasa->rc.afu_rc, ioasa->rc.scsi_rc, ioasa->rc.fc_rc,
- ioasa->afu_extra, ioasa->scsi_extra, ioasa->fc_extra);
-
- if (ioasa->rc.scsi_rc) {
- /* We have a SCSI status */
- if (ioasa->rc.flags & SISL_RC_FLAGS_SENSE_VALID) {
- memcpy(scp->sense_buffer, ioasa->sense_data,
- SISL_SENSE_DATA_LEN);
- scp->result = ioasa->rc.scsi_rc;
- } else
- scp->result = ioasa->rc.scsi_rc | (DID_ERROR << 16);
- }
-
- /*
- * We encountered an error. Set scp->result based on nature
- * of error.
- */
- if (ioasa->rc.fc_rc) {
- /* We have an FC status */
- switch (ioasa->rc.fc_rc) {
- case SISL_FC_RC_LINKDOWN:
- scp->result = (DID_REQUEUE << 16);
- break;
- case SISL_FC_RC_RESID:
- /* This indicates an FCP resid underrun */
- if (!(ioasa->rc.flags & SISL_RC_FLAGS_OVERRUN)) {
- /* If the SISL_RC_FLAGS_OVERRUN flag was set,
- * then we will handle this error else where.
- * If not then we must handle it here.
- * This is probably an AFU bug.
- */
- scp->result = (DID_ERROR << 16);
- }
- break;
- case SISL_FC_RC_RESIDERR:
- /* Resid mismatch between adapter and device */
- case SISL_FC_RC_TGTABORT:
- case SISL_FC_RC_ABORTOK:
- case SISL_FC_RC_ABORTFAIL:
- case SISL_FC_RC_NOLOGI:
- case SISL_FC_RC_ABORTPEND:
- case SISL_FC_RC_WRABORTPEND:
- case SISL_FC_RC_NOEXP:
- case SISL_FC_RC_INUSE:
- scp->result = (DID_ERROR << 16);
- break;
- }
- }
-
- if (ioasa->rc.afu_rc) {
- /* We have an AFU error */
- switch (ioasa->rc.afu_rc) {
- case SISL_AFU_RC_NO_CHANNELS:
- scp->result = (DID_NO_CONNECT << 16);
- break;
- case SISL_AFU_RC_DATA_DMA_ERR:
- switch (ioasa->afu_extra) {
- case SISL_AFU_DMA_ERR_PAGE_IN:
- /* Retry */
- scp->result = (DID_IMM_RETRY << 16);
- break;
- case SISL_AFU_DMA_ERR_INVALID_EA:
- default:
- scp->result = (DID_ERROR << 16);
- }
- break;
- case SISL_AFU_RC_OUT_OF_DATA_BUFS:
- /* Retry */
- scp->result = (DID_ERROR << 16);
- break;
- default:
- scp->result = (DID_ERROR << 16);
- }
- }
-}
-
-/**
- * cmd_complete() - command completion handler
- * @cmd: AFU command that has completed.
- *
- * For SCSI commands this routine prepares and submits commands that have
- * either completed or timed out to the SCSI stack. For internal commands
- * (TMF or AFU), this routine simply notifies the originator that the
- * command has completed.
- */
-static void cmd_complete(struct afu_cmd *cmd)
-{
- struct scsi_cmnd *scp;
- ulong lock_flags;
- struct afu *afu = cmd->parent;
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq = get_hwq(afu, cmd->hwq_index);
-
- spin_lock_irqsave(&hwq->hsq_slock, lock_flags);
- list_del(&cmd->list);
- spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
-
- if (cmd->scp) {
- scp = cmd->scp;
- if (unlikely(cmd->sa.ioasc))
- process_cmd_err(cmd, scp);
- else
- scp->result = (DID_OK << 16);
-
- dev_dbg_ratelimited(dev, "%s:scp=%p result=%08x ioasc=%08x\n",
- __func__, scp, scp->result, cmd->sa.ioasc);
- scsi_done(scp);
- } else if (cmd->cmd_tmf) {
- spin_lock_irqsave(&cfg->tmf_slock, lock_flags);
- cfg->tmf_active = false;
- wake_up_all_locked(&cfg->tmf_waitq);
- spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags);
- } else
- complete(&cmd->cevent);
-}
-
-/**
- * flush_pending_cmds() - flush all pending commands on this hardware queue
- * @hwq: Hardware queue to flush.
- *
- * The hardware send queue lock associated with this hardware queue must be
- * held when calling this routine.
- */
-static void flush_pending_cmds(struct hwq *hwq)
-{
- struct cxlflash_cfg *cfg = hwq->afu->parent;
- struct afu_cmd *cmd, *tmp;
- struct scsi_cmnd *scp;
- ulong lock_flags;
-
- list_for_each_entry_safe(cmd, tmp, &hwq->pending_cmds, list) {
- /* Bypass command when on a doneq, cmd_complete() will handle */
- if (!list_empty(&cmd->queue))
- continue;
-
- list_del(&cmd->list);
-
- if (cmd->scp) {
- scp = cmd->scp;
- scp->result = (DID_IMM_RETRY << 16);
- scsi_done(scp);
- } else {
- cmd->cmd_aborted = true;
-
- if (cmd->cmd_tmf) {
- spin_lock_irqsave(&cfg->tmf_slock, lock_flags);
- cfg->tmf_active = false;
- wake_up_all_locked(&cfg->tmf_waitq);
- spin_unlock_irqrestore(&cfg->tmf_slock,
- lock_flags);
- } else
- complete(&cmd->cevent);
- }
- }
-}
-
-/**
- * context_reset() - reset context via specified register
- * @hwq: Hardware queue owning the context to be reset.
- * @reset_reg: MMIO register to perform reset.
- *
- * When the reset is successful, the SISLite specification guarantees that
- * the AFU has aborted all currently pending I/O. Accordingly, these commands
- * must be flushed.
- *
- * Return: 0 on success, -errno on failure
- */
-static int context_reset(struct hwq *hwq, __be64 __iomem *reset_reg)
-{
- struct cxlflash_cfg *cfg = hwq->afu->parent;
- struct device *dev = &cfg->dev->dev;
- int rc = -ETIMEDOUT;
- int nretry = 0;
- u64 val = 0x1;
- ulong lock_flags;
-
- dev_dbg(dev, "%s: hwq=%p\n", __func__, hwq);
-
- spin_lock_irqsave(&hwq->hsq_slock, lock_flags);
-
- writeq_be(val, reset_reg);
- do {
- val = readq_be(reset_reg);
- if ((val & 0x1) == 0x0) {
- rc = 0;
- break;
- }
-
- /* Double delay each time */
- udelay(1 << nretry);
- } while (nretry++ < MC_ROOM_RETRY_CNT);
-
- if (!rc)
- flush_pending_cmds(hwq);
-
- spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
-
- dev_dbg(dev, "%s: returning rc=%d, val=%016llx nretry=%d\n",
- __func__, rc, val, nretry);
- return rc;
-}
-
-/**
- * context_reset_ioarrin() - reset context via IOARRIN register
- * @hwq: Hardware queue owning the context to be reset.
- *
- * Return: 0 on success, -errno on failure
- */
-static int context_reset_ioarrin(struct hwq *hwq)
-{
- return context_reset(hwq, &hwq->host_map->ioarrin);
-}
-
-/**
- * context_reset_sq() - reset context via SQ_CONTEXT_RESET register
- * @hwq: Hardware queue owning the context to be reset.
- *
- * Return: 0 on success, -errno on failure
- */
-static int context_reset_sq(struct hwq *hwq)
-{
- return context_reset(hwq, &hwq->host_map->sq_ctx_reset);
-}
-
-/**
- * send_cmd_ioarrin() - sends an AFU command via IOARRIN register
- * @afu: AFU associated with the host.
- * @cmd: AFU command to send.
- *
- * Return:
- * 0 on success, SCSI_MLQUEUE_HOST_BUSY on failure
- */
-static int send_cmd_ioarrin(struct afu *afu, struct afu_cmd *cmd)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq = get_hwq(afu, cmd->hwq_index);
- int rc = 0;
- s64 room;
- ulong lock_flags;
-
- /*
- * To avoid the performance penalty of MMIO, spread the update of
- * 'room' over multiple commands.
- */
- spin_lock_irqsave(&hwq->hsq_slock, lock_flags);
- if (--hwq->room < 0) {
- room = readq_be(&hwq->host_map->cmd_room);
- if (room <= 0) {
- dev_dbg_ratelimited(dev, "%s: no cmd_room to send "
- "0x%02X, room=0x%016llX\n",
- __func__, cmd->rcb.cdb[0], room);
- hwq->room = 0;
- rc = SCSI_MLQUEUE_HOST_BUSY;
- goto out;
- }
- hwq->room = room - 1;
- }
-
- list_add(&cmd->list, &hwq->pending_cmds);
- writeq_be((u64)&cmd->rcb, &hwq->host_map->ioarrin);
-out:
- spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
- dev_dbg_ratelimited(dev, "%s: cmd=%p len=%u ea=%016llx rc=%d\n",
- __func__, cmd, cmd->rcb.data_len, cmd->rcb.data_ea, rc);
- return rc;
-}
-
-/**
- * send_cmd_sq() - sends an AFU command via SQ ring
- * @afu: AFU associated with the host.
- * @cmd: AFU command to send.
- *
- * Return:
- * 0 on success, SCSI_MLQUEUE_HOST_BUSY on failure
- */
-static int send_cmd_sq(struct afu *afu, struct afu_cmd *cmd)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq = get_hwq(afu, cmd->hwq_index);
- int rc = 0;
- int newval;
- ulong lock_flags;
-
- newval = atomic_dec_if_positive(&hwq->hsq_credits);
- if (newval <= 0) {
- rc = SCSI_MLQUEUE_HOST_BUSY;
- goto out;
- }
-
- cmd->rcb.ioasa = &cmd->sa;
-
- spin_lock_irqsave(&hwq->hsq_slock, lock_flags);
-
- *hwq->hsq_curr = cmd->rcb;
- if (hwq->hsq_curr < hwq->hsq_end)
- hwq->hsq_curr++;
- else
- hwq->hsq_curr = hwq->hsq_start;
-
- list_add(&cmd->list, &hwq->pending_cmds);
- writeq_be((u64)hwq->hsq_curr, &hwq->host_map->sq_tail);
-
- spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
-out:
- dev_dbg(dev, "%s: cmd=%p len=%u ea=%016llx ioasa=%p rc=%d curr=%p "
- "head=%016llx tail=%016llx\n", __func__, cmd, cmd->rcb.data_len,
- cmd->rcb.data_ea, cmd->rcb.ioasa, rc, hwq->hsq_curr,
- readq_be(&hwq->host_map->sq_head),
- readq_be(&hwq->host_map->sq_tail));
- return rc;
-}
-
-/**
- * wait_resp() - polls for a response or timeout to a sent AFU command
- * @afu: AFU associated with the host.
- * @cmd: AFU command that was sent.
- *
- * Return: 0 on success, -errno on failure
- */
-static int wait_resp(struct afu *afu, struct afu_cmd *cmd)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- int rc = 0;
- ulong timeout = msecs_to_jiffies(cmd->rcb.timeout * 2 * 1000);
-
- timeout = wait_for_completion_timeout(&cmd->cevent, timeout);
- if (!timeout)
- rc = -ETIMEDOUT;
-
- if (cmd->cmd_aborted)
- rc = -EAGAIN;
-
- if (unlikely(cmd->sa.ioasc != 0)) {
- dev_err(dev, "%s: cmd %02x failed, ioasc=%08x\n",
- __func__, cmd->rcb.cdb[0], cmd->sa.ioasc);
- rc = -EIO;
- }
-
- return rc;
-}
-
-/**
- * cmd_to_target_hwq() - selects a target hardware queue for a SCSI command
- * @host: SCSI host associated with device.
- * @scp: SCSI command to send.
- * @afu: SCSI command to send.
- *
- * Hashes a command based upon the hardware queue mode.
- *
- * Return: Trusted index of target hardware queue
- */
-static u32 cmd_to_target_hwq(struct Scsi_Host *host, struct scsi_cmnd *scp,
- struct afu *afu)
-{
- u32 tag;
- u32 hwq = 0;
-
- if (afu->num_hwqs == 1)
- return 0;
-
- switch (afu->hwq_mode) {
- case HWQ_MODE_RR:
- hwq = afu->hwq_rr_count++ % afu->num_hwqs;
- break;
- case HWQ_MODE_TAG:
- tag = blk_mq_unique_tag(scsi_cmd_to_rq(scp));
- hwq = blk_mq_unique_tag_to_hwq(tag);
- break;
- case HWQ_MODE_CPU:
- hwq = smp_processor_id() % afu->num_hwqs;
- break;
- default:
- WARN_ON_ONCE(1);
- }
-
- return hwq;
-}
-
-/**
- * send_tmf() - sends a Task Management Function (TMF)
- * @cfg: Internal structure associated with the host.
- * @sdev: SCSI device destined for TMF.
- * @tmfcmd: TMF command to send.
- *
- * Return:
- * 0 on success, SCSI_MLQUEUE_HOST_BUSY or -errno on failure
- */
-static int send_tmf(struct cxlflash_cfg *cfg, struct scsi_device *sdev,
- u64 tmfcmd)
-{
- struct afu *afu = cfg->afu;
- struct afu_cmd *cmd = NULL;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq = get_hwq(afu, PRIMARY_HWQ);
- bool needs_deletion = false;
- char *buf = NULL;
- ulong lock_flags;
- int rc = 0;
- ulong to;
-
- buf = kzalloc(sizeof(*cmd) + __alignof__(*cmd) - 1, GFP_KERNEL);
- if (unlikely(!buf)) {
- dev_err(dev, "%s: no memory for command\n", __func__);
- rc = -ENOMEM;
- goto out;
- }
-
- cmd = (struct afu_cmd *)PTR_ALIGN(buf, __alignof__(*cmd));
- INIT_LIST_HEAD(&cmd->queue);
-
- /* When Task Management Function is active do not send another */
- spin_lock_irqsave(&cfg->tmf_slock, lock_flags);
- if (cfg->tmf_active)
- wait_event_interruptible_lock_irq(cfg->tmf_waitq,
- !cfg->tmf_active,
- cfg->tmf_slock);
- cfg->tmf_active = true;
- spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags);
-
- cmd->parent = afu;
- cmd->cmd_tmf = true;
- cmd->hwq_index = hwq->index;
-
- cmd->rcb.ctx_id = hwq->ctx_hndl;
- cmd->rcb.msi = SISL_MSI_RRQ_UPDATED;
- cmd->rcb.port_sel = CHAN2PORTMASK(sdev->channel);
- cmd->rcb.lun_id = lun_to_lunid(sdev->lun);
- cmd->rcb.req_flags = (SISL_REQ_FLAGS_PORT_LUN_ID |
- SISL_REQ_FLAGS_SUP_UNDERRUN |
- SISL_REQ_FLAGS_TMF_CMD);
- memcpy(cmd->rcb.cdb, &tmfcmd, sizeof(tmfcmd));
-
- rc = afu->send_cmd(afu, cmd);
- if (unlikely(rc)) {
- spin_lock_irqsave(&cfg->tmf_slock, lock_flags);
- cfg->tmf_active = false;
- spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags);
- goto out;
- }
-
- spin_lock_irqsave(&cfg->tmf_slock, lock_flags);
- to = msecs_to_jiffies(5000);
- to = wait_event_interruptible_lock_irq_timeout(cfg->tmf_waitq,
- !cfg->tmf_active,
- cfg->tmf_slock,
- to);
- if (!to) {
- dev_err(dev, "%s: TMF timed out\n", __func__);
- rc = -ETIMEDOUT;
- needs_deletion = true;
- } else if (cmd->cmd_aborted) {
- dev_err(dev, "%s: TMF aborted\n", __func__);
- rc = -EAGAIN;
- } else if (cmd->sa.ioasc) {
- dev_err(dev, "%s: TMF failed ioasc=%08x\n",
- __func__, cmd->sa.ioasc);
- rc = -EIO;
- }
- cfg->tmf_active = false;
- spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags);
-
- if (needs_deletion) {
- spin_lock_irqsave(&hwq->hsq_slock, lock_flags);
- list_del(&cmd->list);
- spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
- }
-out:
- kfree(buf);
- return rc;
-}
-
-/**
- * cxlflash_driver_info() - information handler for this host driver
- * @host: SCSI host associated with device.
- *
- * Return: A string describing the device.
- */
-static const char *cxlflash_driver_info(struct Scsi_Host *host)
-{
- return CXLFLASH_ADAPTER_NAME;
-}
-
-/**
- * cxlflash_queuecommand() - sends a mid-layer request
- * @host: SCSI host associated with device.
- * @scp: SCSI command to send.
- *
- * Return: 0 on success, SCSI_MLQUEUE_HOST_BUSY on failure
- */
-static int cxlflash_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scp)
-{
- struct cxlflash_cfg *cfg = shost_priv(host);
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct afu_cmd *cmd = sc_to_afuci(scp);
- struct scatterlist *sg = scsi_sglist(scp);
- int hwq_index = cmd_to_target_hwq(host, scp, afu);
- struct hwq *hwq = get_hwq(afu, hwq_index);
- u16 req_flags = SISL_REQ_FLAGS_SUP_UNDERRUN;
- ulong lock_flags;
- int rc = 0;
-
- dev_dbg_ratelimited(dev, "%s: (scp=%p) %d/%d/%d/%llu "
- "cdb=(%08x-%08x-%08x-%08x)\n",
- __func__, scp, host->host_no, scp->device->channel,
- scp->device->id, scp->device->lun,
- get_unaligned_be32(&((u32 *)scp->cmnd)[0]),
- get_unaligned_be32(&((u32 *)scp->cmnd)[1]),
- get_unaligned_be32(&((u32 *)scp->cmnd)[2]),
- get_unaligned_be32(&((u32 *)scp->cmnd)[3]));
-
- /*
- * If a Task Management Function is active, wait for it to complete
- * before continuing with regular commands.
- */
- spin_lock_irqsave(&cfg->tmf_slock, lock_flags);
- if (cfg->tmf_active) {
- spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags);
- rc = SCSI_MLQUEUE_HOST_BUSY;
- goto out;
- }
- spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags);
-
- switch (cfg->state) {
- case STATE_PROBING:
- case STATE_PROBED:
- case STATE_RESET:
- dev_dbg_ratelimited(dev, "%s: device is in reset\n", __func__);
- rc = SCSI_MLQUEUE_HOST_BUSY;
- goto out;
- case STATE_FAILTERM:
- dev_dbg_ratelimited(dev, "%s: device has failed\n", __func__);
- scp->result = (DID_NO_CONNECT << 16);
- scsi_done(scp);
- rc = 0;
- goto out;
- default:
- atomic_inc(&afu->cmds_active);
- break;
- }
-
- if (likely(sg)) {
- cmd->rcb.data_len = sg->length;
- cmd->rcb.data_ea = (uintptr_t)sg_virt(sg);
- }
-
- cmd->scp = scp;
- cmd->parent = afu;
- cmd->hwq_index = hwq_index;
-
- cmd->sa.ioasc = 0;
- cmd->rcb.ctx_id = hwq->ctx_hndl;
- cmd->rcb.msi = SISL_MSI_RRQ_UPDATED;
- cmd->rcb.port_sel = CHAN2PORTMASK(scp->device->channel);
- cmd->rcb.lun_id = lun_to_lunid(scp->device->lun);
-
- if (scp->sc_data_direction == DMA_TO_DEVICE)
- req_flags |= SISL_REQ_FLAGS_HOST_WRITE;
-
- cmd->rcb.req_flags = req_flags;
- memcpy(cmd->rcb.cdb, scp->cmnd, sizeof(cmd->rcb.cdb));
-
- rc = afu->send_cmd(afu, cmd);
- atomic_dec(&afu->cmds_active);
-out:
- return rc;
-}
-
-/**
- * cxlflash_wait_for_pci_err_recovery() - wait for error recovery during probe
- * @cfg: Internal structure associated with the host.
- */
-static void cxlflash_wait_for_pci_err_recovery(struct cxlflash_cfg *cfg)
-{
- struct pci_dev *pdev = cfg->dev;
-
- if (pci_channel_offline(pdev))
- wait_event_timeout(cfg->reset_waitq,
- !pci_channel_offline(pdev),
- CXLFLASH_PCI_ERROR_RECOVERY_TIMEOUT);
-}
-
-/**
- * free_mem() - free memory associated with the AFU
- * @cfg: Internal structure associated with the host.
- */
-static void free_mem(struct cxlflash_cfg *cfg)
-{
- struct afu *afu = cfg->afu;
-
- if (cfg->afu) {
- free_pages((ulong)afu, get_order(sizeof(struct afu)));
- cfg->afu = NULL;
- }
-}
-
-/**
- * cxlflash_reset_sync() - synchronizing point for asynchronous resets
- * @cfg: Internal structure associated with the host.
- */
-static void cxlflash_reset_sync(struct cxlflash_cfg *cfg)
-{
- if (cfg->async_reset_cookie == 0)
- return;
-
- /* Wait until all async calls prior to this cookie have completed */
- async_synchronize_cookie(cfg->async_reset_cookie + 1);
- cfg->async_reset_cookie = 0;
-}
-
-/**
- * stop_afu() - stops the AFU command timers and unmaps the MMIO space
- * @cfg: Internal structure associated with the host.
- *
- * Safe to call with AFU in a partially allocated/initialized state.
- *
- * Cancels scheduled worker threads, waits for any active internal AFU
- * commands to timeout, disables IRQ polling and then unmaps the MMIO space.
- */
-static void stop_afu(struct cxlflash_cfg *cfg)
-{
- struct afu *afu = cfg->afu;
- struct hwq *hwq;
- int i;
-
- cancel_work_sync(&cfg->work_q);
- if (!current_is_async())
- cxlflash_reset_sync(cfg);
-
- if (likely(afu)) {
- while (atomic_read(&afu->cmds_active))
- ssleep(1);
-
- if (afu_is_irqpoll_enabled(afu)) {
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
-
- irq_poll_disable(&hwq->irqpoll);
- }
- }
-
- if (likely(afu->afu_map)) {
- cfg->ops->psa_unmap(afu->afu_map);
- afu->afu_map = NULL;
- }
- }
-}
-
-/**
- * term_intr() - disables all AFU interrupts
- * @cfg: Internal structure associated with the host.
- * @level: Depth of allocation, where to begin waterfall tear down.
- * @index: Index of the hardware queue.
- *
- * Safe to call with AFU/MC in partially allocated/initialized state.
- */
-static void term_intr(struct cxlflash_cfg *cfg, enum undo_level level,
- u32 index)
-{
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq;
-
- if (!afu) {
- dev_err(dev, "%s: returning with NULL afu\n", __func__);
- return;
- }
-
- hwq = get_hwq(afu, index);
-
- if (!hwq->ctx_cookie) {
- dev_err(dev, "%s: returning with NULL MC\n", __func__);
- return;
- }
-
- switch (level) {
- case UNMAP_THREE:
- /* SISL_MSI_ASYNC_ERROR is setup only for the primary HWQ */
- if (index == PRIMARY_HWQ)
- cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 3, hwq);
- fallthrough;
- case UNMAP_TWO:
- cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 2, hwq);
- fallthrough;
- case UNMAP_ONE:
- cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 1, hwq);
- fallthrough;
- case FREE_IRQ:
- cfg->ops->free_afu_irqs(hwq->ctx_cookie);
- fallthrough;
- case UNDO_NOOP:
- /* No action required */
- break;
- }
-}
-
-/**
- * term_mc() - terminates the master context
- * @cfg: Internal structure associated with the host.
- * @index: Index of the hardware queue.
- *
- * Safe to call with AFU/MC in partially allocated/initialized state.
- */
-static void term_mc(struct cxlflash_cfg *cfg, u32 index)
-{
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq;
- ulong lock_flags;
-
- if (!afu) {
- dev_err(dev, "%s: returning with NULL afu\n", __func__);
- return;
- }
-
- hwq = get_hwq(afu, index);
-
- if (!hwq->ctx_cookie) {
- dev_err(dev, "%s: returning with NULL MC\n", __func__);
- return;
- }
-
- WARN_ON(cfg->ops->stop_context(hwq->ctx_cookie));
- if (index != PRIMARY_HWQ)
- WARN_ON(cfg->ops->release_context(hwq->ctx_cookie));
- hwq->ctx_cookie = NULL;
-
- spin_lock_irqsave(&hwq->hrrq_slock, lock_flags);
- hwq->hrrq_online = false;
- spin_unlock_irqrestore(&hwq->hrrq_slock, lock_flags);
-
- spin_lock_irqsave(&hwq->hsq_slock, lock_flags);
- flush_pending_cmds(hwq);
- spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
-}
-
-/**
- * term_afu() - terminates the AFU
- * @cfg: Internal structure associated with the host.
- *
- * Safe to call with AFU/MC in partially allocated/initialized state.
- */
-static void term_afu(struct cxlflash_cfg *cfg)
-{
- struct device *dev = &cfg->dev->dev;
- int k;
-
- /*
- * Tear down is carefully orchestrated to ensure
- * no interrupts can come in when the problem state
- * area is unmapped.
- *
- * 1) Disable all AFU interrupts for each master
- * 2) Unmap the problem state area
- * 3) Stop each master context
- */
- for (k = cfg->afu->num_hwqs - 1; k >= 0; k--)
- term_intr(cfg, UNMAP_THREE, k);
-
- stop_afu(cfg);
-
- for (k = cfg->afu->num_hwqs - 1; k >= 0; k--)
- term_mc(cfg, k);
-
- dev_dbg(dev, "%s: returning\n", __func__);
-}
-
-/**
- * notify_shutdown() - notifies device of pending shutdown
- * @cfg: Internal structure associated with the host.
- * @wait: Whether to wait for shutdown processing to complete.
- *
- * This function will notify the AFU that the adapter is being shutdown
- * and will wait for shutdown processing to complete if wait is true.
- * This notification should flush pending I/Os to the device and halt
- * further I/Os until the next AFU reset is issued and device restarted.
- */
-static void notify_shutdown(struct cxlflash_cfg *cfg, bool wait)
-{
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct dev_dependent_vals *ddv;
- __be64 __iomem *fc_port_regs;
- u64 reg, status;
- int i, retry_cnt = 0;
-
- ddv = (struct dev_dependent_vals *)cfg->dev_id->driver_data;
- if (!(ddv->flags & CXLFLASH_NOTIFY_SHUTDOWN))
- return;
-
- if (!afu || !afu->afu_map) {
- dev_dbg(dev, "%s: Problem state area not mapped\n", __func__);
- return;
- }
-
- /* Notify AFU */
- for (i = 0; i < cfg->num_fc_ports; i++) {
- fc_port_regs = get_fc_port_regs(cfg, i);
-
- reg = readq_be(&fc_port_regs[FC_CONFIG2 / 8]);
- reg |= SISL_FC_SHUTDOWN_NORMAL;
- writeq_be(reg, &fc_port_regs[FC_CONFIG2 / 8]);
- }
-
- if (!wait)
- return;
-
- /* Wait up to 1.5 seconds for shutdown processing to complete */
- for (i = 0; i < cfg->num_fc_ports; i++) {
- fc_port_regs = get_fc_port_regs(cfg, i);
- retry_cnt = 0;
-
- while (true) {
- status = readq_be(&fc_port_regs[FC_STATUS / 8]);
- if (status & SISL_STATUS_SHUTDOWN_COMPLETE)
- break;
- if (++retry_cnt >= MC_RETRY_CNT) {
- dev_dbg(dev, "%s: port %d shutdown processing "
- "not yet completed\n", __func__, i);
- break;
- }
- msleep(100 * retry_cnt);
- }
- }
-}
-
-/**
- * cxlflash_get_minor() - gets the first available minor number
- *
- * Return: Unique minor number that can be used to create the character device.
- */
-static int cxlflash_get_minor(void)
-{
- int minor;
- long bit;
-
- bit = find_first_zero_bit(cxlflash_minor, CXLFLASH_MAX_ADAPTERS);
- if (bit >= CXLFLASH_MAX_ADAPTERS)
- return -1;
-
- minor = bit & MINORMASK;
- set_bit(minor, cxlflash_minor);
- return minor;
-}
-
-/**
- * cxlflash_put_minor() - releases the minor number
- * @minor: Minor number that is no longer needed.
- */
-static void cxlflash_put_minor(int minor)
-{
- clear_bit(minor, cxlflash_minor);
-}
-
-/**
- * cxlflash_release_chrdev() - release the character device for the host
- * @cfg: Internal structure associated with the host.
- */
-static void cxlflash_release_chrdev(struct cxlflash_cfg *cfg)
-{
- device_unregister(cfg->chardev);
- cfg->chardev = NULL;
- cdev_del(&cfg->cdev);
- cxlflash_put_minor(MINOR(cfg->cdev.dev));
-}
-
-/**
- * cxlflash_remove() - PCI entry point to tear down host
- * @pdev: PCI device associated with the host.
- *
- * Safe to use as a cleanup in partially allocated/initialized state. Note that
- * the reset_waitq is flushed as part of the stop/termination of user contexts.
- */
-static void cxlflash_remove(struct pci_dev *pdev)
-{
- struct cxlflash_cfg *cfg = pci_get_drvdata(pdev);
- struct device *dev = &pdev->dev;
- ulong lock_flags;
-
- if (!pci_is_enabled(pdev)) {
- dev_dbg(dev, "%s: Device is disabled\n", __func__);
- return;
- }
-
- /* Yield to running recovery threads before continuing with remove */
- wait_event(cfg->reset_waitq, cfg->state != STATE_RESET &&
- cfg->state != STATE_PROBING);
- spin_lock_irqsave(&cfg->tmf_slock, lock_flags);
- if (cfg->tmf_active)
- wait_event_interruptible_lock_irq(cfg->tmf_waitq,
- !cfg->tmf_active,
- cfg->tmf_slock);
- spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags);
-
- /* Notify AFU and wait for shutdown processing to complete */
- notify_shutdown(cfg, true);
-
- cfg->state = STATE_FAILTERM;
- cxlflash_stop_term_user_contexts(cfg);
-
- switch (cfg->init_state) {
- case INIT_STATE_CDEV:
- cxlflash_release_chrdev(cfg);
- fallthrough;
- case INIT_STATE_SCSI:
- cxlflash_term_local_luns(cfg);
- scsi_remove_host(cfg->host);
- fallthrough;
- case INIT_STATE_AFU:
- term_afu(cfg);
- fallthrough;
- case INIT_STATE_PCI:
- cfg->ops->destroy_afu(cfg->afu_cookie);
- pci_disable_device(pdev);
- fallthrough;
- case INIT_STATE_NONE:
- free_mem(cfg);
- scsi_host_put(cfg->host);
- break;
- }
-
- dev_dbg(dev, "%s: returning\n", __func__);
-}
-
-/**
- * alloc_mem() - allocates the AFU and its command pool
- * @cfg: Internal structure associated with the host.
- *
- * A partially allocated state remains on failure.
- *
- * Return:
- * 0 on success
- * -ENOMEM on failure to allocate memory
- */
-static int alloc_mem(struct cxlflash_cfg *cfg)
-{
- int rc = 0;
- struct device *dev = &cfg->dev->dev;
-
- /* AFU is ~28k, i.e. only one 64k page or up to seven 4k pages */
- cfg->afu = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
- get_order(sizeof(struct afu)));
- if (unlikely(!cfg->afu)) {
- dev_err(dev, "%s: cannot get %d free pages\n",
- __func__, get_order(sizeof(struct afu)));
- rc = -ENOMEM;
- goto out;
- }
- cfg->afu->parent = cfg;
- cfg->afu->desired_hwqs = CXLFLASH_DEF_HWQS;
- cfg->afu->afu_map = NULL;
-out:
- return rc;
-}
-
-/**
- * init_pci() - initializes the host as a PCI device
- * @cfg: Internal structure associated with the host.
- *
- * Return: 0 on success, -errno on failure
- */
-static int init_pci(struct cxlflash_cfg *cfg)
-{
- struct pci_dev *pdev = cfg->dev;
- struct device *dev = &cfg->dev->dev;
- int rc = 0;
-
- rc = pci_enable_device(pdev);
- if (rc || pci_channel_offline(pdev)) {
- if (pci_channel_offline(pdev)) {
- cxlflash_wait_for_pci_err_recovery(cfg);
- rc = pci_enable_device(pdev);
- }
-
- if (rc) {
- dev_err(dev, "%s: Cannot enable adapter\n", __func__);
- cxlflash_wait_for_pci_err_recovery(cfg);
- goto out;
- }
- }
-
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * init_scsi() - adds the host to the SCSI stack and kicks off host scan
- * @cfg: Internal structure associated with the host.
- *
- * Return: 0 on success, -errno on failure
- */
-static int init_scsi(struct cxlflash_cfg *cfg)
-{
- struct pci_dev *pdev = cfg->dev;
- struct device *dev = &cfg->dev->dev;
- int rc = 0;
-
- rc = scsi_add_host(cfg->host, &pdev->dev);
- if (rc) {
- dev_err(dev, "%s: scsi_add_host failed rc=%d\n", __func__, rc);
- goto out;
- }
-
- scsi_scan_host(cfg->host);
-
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * set_port_online() - transitions the specified host FC port to online state
- * @fc_regs: Top of MMIO region defined for specified port.
- *
- * The provided MMIO region must be mapped prior to call. Online state means
- * that the FC link layer has synced, completed the handshaking process, and
- * is ready for login to start.
- */
-static void set_port_online(__be64 __iomem *fc_regs)
-{
- u64 cmdcfg;
-
- cmdcfg = readq_be(&fc_regs[FC_MTIP_CMDCONFIG / 8]);
- cmdcfg &= (~FC_MTIP_CMDCONFIG_OFFLINE); /* clear OFF_LINE */
- cmdcfg |= (FC_MTIP_CMDCONFIG_ONLINE); /* set ON_LINE */
- writeq_be(cmdcfg, &fc_regs[FC_MTIP_CMDCONFIG / 8]);
-}
-
-/**
- * set_port_offline() - transitions the specified host FC port to offline state
- * @fc_regs: Top of MMIO region defined for specified port.
- *
- * The provided MMIO region must be mapped prior to call.
- */
-static void set_port_offline(__be64 __iomem *fc_regs)
-{
- u64 cmdcfg;
-
- cmdcfg = readq_be(&fc_regs[FC_MTIP_CMDCONFIG / 8]);
- cmdcfg &= (~FC_MTIP_CMDCONFIG_ONLINE); /* clear ON_LINE */
- cmdcfg |= (FC_MTIP_CMDCONFIG_OFFLINE); /* set OFF_LINE */
- writeq_be(cmdcfg, &fc_regs[FC_MTIP_CMDCONFIG / 8]);
-}
-
-/**
- * wait_port_online() - waits for the specified host FC port come online
- * @fc_regs: Top of MMIO region defined for specified port.
- * @delay_us: Number of microseconds to delay between reading port status.
- * @nretry: Number of cycles to retry reading port status.
- *
- * The provided MMIO region must be mapped prior to call. This will timeout
- * when the cable is not plugged in.
- *
- * Return:
- * TRUE (1) when the specified port is online
- * FALSE (0) when the specified port fails to come online after timeout
- */
-static bool wait_port_online(__be64 __iomem *fc_regs, u32 delay_us, u32 nretry)
-{
- u64 status;
-
- WARN_ON(delay_us < 1000);
-
- do {
- msleep(delay_us / 1000);
- status = readq_be(&fc_regs[FC_MTIP_STATUS / 8]);
- if (status == U64_MAX)
- nretry /= 2;
- } while ((status & FC_MTIP_STATUS_MASK) != FC_MTIP_STATUS_ONLINE &&
- nretry--);
-
- return ((status & FC_MTIP_STATUS_MASK) == FC_MTIP_STATUS_ONLINE);
-}
-
-/**
- * wait_port_offline() - waits for the specified host FC port go offline
- * @fc_regs: Top of MMIO region defined for specified port.
- * @delay_us: Number of microseconds to delay between reading port status.
- * @nretry: Number of cycles to retry reading port status.
- *
- * The provided MMIO region must be mapped prior to call.
- *
- * Return:
- * TRUE (1) when the specified port is offline
- * FALSE (0) when the specified port fails to go offline after timeout
- */
-static bool wait_port_offline(__be64 __iomem *fc_regs, u32 delay_us, u32 nretry)
-{
- u64 status;
-
- WARN_ON(delay_us < 1000);
-
- do {
- msleep(delay_us / 1000);
- status = readq_be(&fc_regs[FC_MTIP_STATUS / 8]);
- if (status == U64_MAX)
- nretry /= 2;
- } while ((status & FC_MTIP_STATUS_MASK) != FC_MTIP_STATUS_OFFLINE &&
- nretry--);
-
- return ((status & FC_MTIP_STATUS_MASK) == FC_MTIP_STATUS_OFFLINE);
-}
-
-/**
- * afu_set_wwpn() - configures the WWPN for the specified host FC port
- * @afu: AFU associated with the host that owns the specified FC port.
- * @port: Port number being configured.
- * @fc_regs: Top of MMIO region defined for specified port.
- * @wwpn: The world-wide-port-number previously discovered for port.
- *
- * The provided MMIO region must be mapped prior to call. As part of the
- * sequence to configure the WWPN, the port is toggled offline and then back
- * online. This toggling action can cause this routine to delay up to a few
- * seconds. When configured to use the internal LUN feature of the AFU, a
- * failure to come online is overridden.
- */
-static void afu_set_wwpn(struct afu *afu, int port, __be64 __iomem *fc_regs,
- u64 wwpn)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
-
- set_port_offline(fc_regs);
- if (!wait_port_offline(fc_regs, FC_PORT_STATUS_RETRY_INTERVAL_US,
- FC_PORT_STATUS_RETRY_CNT)) {
- dev_dbg(dev, "%s: wait on port %d to go offline timed out\n",
- __func__, port);
- }
-
- writeq_be(wwpn, &fc_regs[FC_PNAME / 8]);
-
- set_port_online(fc_regs);
- if (!wait_port_online(fc_regs, FC_PORT_STATUS_RETRY_INTERVAL_US,
- FC_PORT_STATUS_RETRY_CNT)) {
- dev_dbg(dev, "%s: wait on port %d to go online timed out\n",
- __func__, port);
- }
-}
-
-/**
- * afu_link_reset() - resets the specified host FC port
- * @afu: AFU associated with the host that owns the specified FC port.
- * @port: Port number being configured.
- * @fc_regs: Top of MMIO region defined for specified port.
- *
- * The provided MMIO region must be mapped prior to call. The sequence to
- * reset the port involves toggling it offline and then back online. This
- * action can cause this routine to delay up to a few seconds. An effort
- * is made to maintain link with the device by switching to host to use
- * the alternate port exclusively while the reset takes place.
- * failure to come online is overridden.
- */
-static void afu_link_reset(struct afu *afu, int port, __be64 __iomem *fc_regs)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- u64 port_sel;
-
- /* first switch the AFU to the other links, if any */
- port_sel = readq_be(&afu->afu_map->global.regs.afu_port_sel);
- port_sel &= ~(1ULL << port);
- writeq_be(port_sel, &afu->afu_map->global.regs.afu_port_sel);
- cxlflash_afu_sync(afu, 0, 0, AFU_GSYNC);
-
- set_port_offline(fc_regs);
- if (!wait_port_offline(fc_regs, FC_PORT_STATUS_RETRY_INTERVAL_US,
- FC_PORT_STATUS_RETRY_CNT))
- dev_err(dev, "%s: wait on port %d to go offline timed out\n",
- __func__, port);
-
- set_port_online(fc_regs);
- if (!wait_port_online(fc_regs, FC_PORT_STATUS_RETRY_INTERVAL_US,
- FC_PORT_STATUS_RETRY_CNT))
- dev_err(dev, "%s: wait on port %d to go online timed out\n",
- __func__, port);
-
- /* switch back to include this port */
- port_sel |= (1ULL << port);
- writeq_be(port_sel, &afu->afu_map->global.regs.afu_port_sel);
- cxlflash_afu_sync(afu, 0, 0, AFU_GSYNC);
-
- dev_dbg(dev, "%s: returning port_sel=%016llx\n", __func__, port_sel);
-}
-
-/**
- * afu_err_intr_init() - clears and initializes the AFU for error interrupts
- * @afu: AFU associated with the host.
- */
-static void afu_err_intr_init(struct afu *afu)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- __be64 __iomem *fc_port_regs;
- int i;
- struct hwq *hwq = get_hwq(afu, PRIMARY_HWQ);
- u64 reg;
-
- /* global async interrupts: AFU clears afu_ctrl on context exit
- * if async interrupts were sent to that context. This prevents
- * the AFU form sending further async interrupts when
- * there is
- * nobody to receive them.
- */
-
- /* mask all */
- writeq_be(-1ULL, &afu->afu_map->global.regs.aintr_mask);
- /* set LISN# to send and point to primary master context */
- reg = ((u64) (((hwq->ctx_hndl << 8) | SISL_MSI_ASYNC_ERROR)) << 40);
-
- if (afu->internal_lun)
- reg |= 1; /* Bit 63 indicates local lun */
- writeq_be(reg, &afu->afu_map->global.regs.afu_ctrl);
- /* clear all */
- writeq_be(-1ULL, &afu->afu_map->global.regs.aintr_clear);
- /* unmask bits that are of interest */
- /* note: afu can send an interrupt after this step */
- writeq_be(SISL_ASTATUS_MASK, &afu->afu_map->global.regs.aintr_mask);
- /* clear again in case a bit came on after previous clear but before */
- /* unmask */
- writeq_be(-1ULL, &afu->afu_map->global.regs.aintr_clear);
-
- /* Clear/Set internal lun bits */
- fc_port_regs = get_fc_port_regs(cfg, 0);
- reg = readq_be(&fc_port_regs[FC_CONFIG2 / 8]);
- reg &= SISL_FC_INTERNAL_MASK;
- if (afu->internal_lun)
- reg |= ((u64)(afu->internal_lun - 1) << SISL_FC_INTERNAL_SHIFT);
- writeq_be(reg, &fc_port_regs[FC_CONFIG2 / 8]);
-
- /* now clear FC errors */
- for (i = 0; i < cfg->num_fc_ports; i++) {
- fc_port_regs = get_fc_port_regs(cfg, i);
-
- writeq_be(0xFFFFFFFFU, &fc_port_regs[FC_ERROR / 8]);
- writeq_be(0, &fc_port_regs[FC_ERRCAP / 8]);
- }
-
- /* sync interrupts for master's IOARRIN write */
- /* note that unlike asyncs, there can be no pending sync interrupts */
- /* at this time (this is a fresh context and master has not written */
- /* IOARRIN yet), so there is nothing to clear. */
-
- /* set LISN#, it is always sent to the context that wrote IOARRIN */
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
-
- reg = readq_be(&hwq->host_map->ctx_ctrl);
- WARN_ON((reg & SISL_CTX_CTRL_LISN_MASK) != 0);
- reg |= SISL_MSI_SYNC_ERROR;
- writeq_be(reg, &hwq->host_map->ctx_ctrl);
- writeq_be(SISL_ISTATUS_MASK, &hwq->host_map->intr_mask);
- }
-}
-
-/**
- * cxlflash_sync_err_irq() - interrupt handler for synchronous errors
- * @irq: Interrupt number.
- * @data: Private data provided at interrupt registration, the AFU.
- *
- * Return: Always return IRQ_HANDLED.
- */
-static irqreturn_t cxlflash_sync_err_irq(int irq, void *data)
-{
- struct hwq *hwq = (struct hwq *)data;
- struct cxlflash_cfg *cfg = hwq->afu->parent;
- struct device *dev = &cfg->dev->dev;
- u64 reg;
- u64 reg_unmasked;
-
- reg = readq_be(&hwq->host_map->intr_status);
- reg_unmasked = (reg & SISL_ISTATUS_UNMASK);
-
- if (reg_unmasked == 0UL) {
- dev_err(dev, "%s: spurious interrupt, intr_status=%016llx\n",
- __func__, reg);
- goto cxlflash_sync_err_irq_exit;
- }
-
- dev_err(dev, "%s: unexpected interrupt, intr_status=%016llx\n",
- __func__, reg);
-
- writeq_be(reg_unmasked, &hwq->host_map->intr_clear);
-
-cxlflash_sync_err_irq_exit:
- return IRQ_HANDLED;
-}
-
-/**
- * process_hrrq() - process the read-response queue
- * @hwq: HWQ associated with the host.
- * @doneq: Queue of commands harvested from the RRQ.
- * @budget: Threshold of RRQ entries to process.
- *
- * This routine must be called holding the disabled RRQ spin lock.
- *
- * Return: The number of entries processed.
- */
-static int process_hrrq(struct hwq *hwq, struct list_head *doneq, int budget)
-{
- struct afu *afu = hwq->afu;
- struct afu_cmd *cmd;
- struct sisl_ioasa *ioasa;
- struct sisl_ioarcb *ioarcb;
- bool toggle = hwq->toggle;
- int num_hrrq = 0;
- u64 entry,
- *hrrq_start = hwq->hrrq_start,
- *hrrq_end = hwq->hrrq_end,
- *hrrq_curr = hwq->hrrq_curr;
-
- /* Process ready RRQ entries up to the specified budget (if any) */
- while (true) {
- entry = *hrrq_curr;
-
- if ((entry & SISL_RESP_HANDLE_T_BIT) != toggle)
- break;
-
- entry &= ~SISL_RESP_HANDLE_T_BIT;
-
- if (afu_is_sq_cmd_mode(afu)) {
- ioasa = (struct sisl_ioasa *)entry;
- cmd = container_of(ioasa, struct afu_cmd, sa);
- } else {
- ioarcb = (struct sisl_ioarcb *)entry;
- cmd = container_of(ioarcb, struct afu_cmd, rcb);
- }
-
- list_add_tail(&cmd->queue, doneq);
-
- /* Advance to next entry or wrap and flip the toggle bit */
- if (hrrq_curr < hrrq_end)
- hrrq_curr++;
- else {
- hrrq_curr = hrrq_start;
- toggle ^= SISL_RESP_HANDLE_T_BIT;
- }
-
- atomic_inc(&hwq->hsq_credits);
- num_hrrq++;
-
- if (budget > 0 && num_hrrq >= budget)
- break;
- }
-
- hwq->hrrq_curr = hrrq_curr;
- hwq->toggle = toggle;
-
- return num_hrrq;
-}
-
-/**
- * process_cmd_doneq() - process a queue of harvested RRQ commands
- * @doneq: Queue of completed commands.
- *
- * Note that upon return the queue can no longer be trusted.
- */
-static void process_cmd_doneq(struct list_head *doneq)
-{
- struct afu_cmd *cmd, *tmp;
-
- WARN_ON(list_empty(doneq));
-
- list_for_each_entry_safe(cmd, tmp, doneq, queue)
- cmd_complete(cmd);
-}
-
-/**
- * cxlflash_irqpoll() - process a queue of harvested RRQ commands
- * @irqpoll: IRQ poll structure associated with queue to poll.
- * @budget: Threshold of RRQ entries to process per poll.
- *
- * Return: The number of entries processed.
- */
-static int cxlflash_irqpoll(struct irq_poll *irqpoll, int budget)
-{
- struct hwq *hwq = container_of(irqpoll, struct hwq, irqpoll);
- unsigned long hrrq_flags;
- LIST_HEAD(doneq);
- int num_entries = 0;
-
- spin_lock_irqsave(&hwq->hrrq_slock, hrrq_flags);
-
- num_entries = process_hrrq(hwq, &doneq, budget);
- if (num_entries < budget)
- irq_poll_complete(irqpoll);
-
- spin_unlock_irqrestore(&hwq->hrrq_slock, hrrq_flags);
-
- process_cmd_doneq(&doneq);
- return num_entries;
-}
-
-/**
- * cxlflash_rrq_irq() - interrupt handler for read-response queue (normal path)
- * @irq: Interrupt number.
- * @data: Private data provided at interrupt registration, the AFU.
- *
- * Return: IRQ_HANDLED or IRQ_NONE when no ready entries found.
- */
-static irqreturn_t cxlflash_rrq_irq(int irq, void *data)
-{
- struct hwq *hwq = (struct hwq *)data;
- struct afu *afu = hwq->afu;
- unsigned long hrrq_flags;
- LIST_HEAD(doneq);
- int num_entries = 0;
-
- spin_lock_irqsave(&hwq->hrrq_slock, hrrq_flags);
-
- /* Silently drop spurious interrupts when queue is not online */
- if (!hwq->hrrq_online) {
- spin_unlock_irqrestore(&hwq->hrrq_slock, hrrq_flags);
- return IRQ_HANDLED;
- }
-
- if (afu_is_irqpoll_enabled(afu)) {
- irq_poll_sched(&hwq->irqpoll);
- spin_unlock_irqrestore(&hwq->hrrq_slock, hrrq_flags);
- return IRQ_HANDLED;
- }
-
- num_entries = process_hrrq(hwq, &doneq, -1);
- spin_unlock_irqrestore(&hwq->hrrq_slock, hrrq_flags);
-
- if (num_entries == 0)
- return IRQ_NONE;
-
- process_cmd_doneq(&doneq);
- return IRQ_HANDLED;
-}
-
-/*
- * Asynchronous interrupt information table
- *
- * NOTE:
- * - Order matters here as this array is indexed by bit position.
- *
- * - The checkpatch script considers the BUILD_SISL_ASTATUS_FC_PORT macro
- * as complex and complains due to a lack of parentheses/braces.
- */
-#define ASTATUS_FC(_a, _b, _c, _d) \
- { SISL_ASTATUS_FC##_a##_##_b, _c, _a, (_d) }
-
-#define BUILD_SISL_ASTATUS_FC_PORT(_a) \
- ASTATUS_FC(_a, LINK_UP, "link up", 0), \
- ASTATUS_FC(_a, LINK_DN, "link down", 0), \
- ASTATUS_FC(_a, LOGI_S, "login succeeded", SCAN_HOST), \
- ASTATUS_FC(_a, LOGI_F, "login failed", CLR_FC_ERROR), \
- ASTATUS_FC(_a, LOGI_R, "login timed out, retrying", LINK_RESET), \
- ASTATUS_FC(_a, CRC_T, "CRC threshold exceeded", LINK_RESET), \
- ASTATUS_FC(_a, LOGO, "target initiated LOGO", 0), \
- ASTATUS_FC(_a, OTHER, "other error", CLR_FC_ERROR | LINK_RESET)
-
-static const struct asyc_intr_info ainfo[] = {
- BUILD_SISL_ASTATUS_FC_PORT(1),
- BUILD_SISL_ASTATUS_FC_PORT(0),
- BUILD_SISL_ASTATUS_FC_PORT(3),
- BUILD_SISL_ASTATUS_FC_PORT(2)
-};
-
-/**
- * cxlflash_async_err_irq() - interrupt handler for asynchronous errors
- * @irq: Interrupt number.
- * @data: Private data provided at interrupt registration, the AFU.
- *
- * Return: Always return IRQ_HANDLED.
- */
-static irqreturn_t cxlflash_async_err_irq(int irq, void *data)
-{
- struct hwq *hwq = (struct hwq *)data;
- struct afu *afu = hwq->afu;
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- const struct asyc_intr_info *info;
- struct sisl_global_map __iomem *global = &afu->afu_map->global;
- __be64 __iomem *fc_port_regs;
- u64 reg_unmasked;
- u64 reg;
- u64 bit;
- u8 port;
-
- reg = readq_be(&global->regs.aintr_status);
- reg_unmasked = (reg & SISL_ASTATUS_UNMASK);
-
- if (unlikely(reg_unmasked == 0)) {
- dev_err(dev, "%s: spurious interrupt, aintr_status=%016llx\n",
- __func__, reg);
- goto out;
- }
-
- /* FYI, it is 'okay' to clear AFU status before FC_ERROR */
- writeq_be(reg_unmasked, &global->regs.aintr_clear);
-
- /* Check each bit that is on */
- for_each_set_bit(bit, (ulong *)®_unmasked, BITS_PER_LONG) {
- if (unlikely(bit >= ARRAY_SIZE(ainfo))) {
- WARN_ON_ONCE(1);
- continue;
- }
-
- info = &ainfo[bit];
- if (unlikely(info->status != 1ULL << bit)) {
- WARN_ON_ONCE(1);
- continue;
- }
-
- port = info->port;
- fc_port_regs = get_fc_port_regs(cfg, port);
-
- dev_err(dev, "%s: FC Port %d -> %s, fc_status=%016llx\n",
- __func__, port, info->desc,
- readq_be(&fc_port_regs[FC_STATUS / 8]));
-
- /*
- * Do link reset first, some OTHER errors will set FC_ERROR
- * again if cleared before or w/o a reset
- */
- if (info->action & LINK_RESET) {
- dev_err(dev, "%s: FC Port %d: resetting link\n",
- __func__, port);
- cfg->lr_state = LINK_RESET_REQUIRED;
- cfg->lr_port = port;
- schedule_work(&cfg->work_q);
- }
-
- if (info->action & CLR_FC_ERROR) {
- reg = readq_be(&fc_port_regs[FC_ERROR / 8]);
-
- /*
- * Since all errors are unmasked, FC_ERROR and FC_ERRCAP
- * should be the same and tracing one is sufficient.
- */
-
- dev_err(dev, "%s: fc %d: clearing fc_error=%016llx\n",
- __func__, port, reg);
-
- writeq_be(reg, &fc_port_regs[FC_ERROR / 8]);
- writeq_be(0, &fc_port_regs[FC_ERRCAP / 8]);
- }
-
- if (info->action & SCAN_HOST) {
- atomic_inc(&cfg->scan_host_needed);
- schedule_work(&cfg->work_q);
- }
- }
-
-out:
- return IRQ_HANDLED;
-}
-
-/**
- * read_vpd() - obtains the WWPNs from VPD
- * @cfg: Internal structure associated with the host.
- * @wwpn: Array of size MAX_FC_PORTS to pass back WWPNs
- *
- * Return: 0 on success, -errno on failure
- */
-static int read_vpd(struct cxlflash_cfg *cfg, u64 wwpn[])
-{
- struct device *dev = &cfg->dev->dev;
- struct pci_dev *pdev = cfg->dev;
- int i, k, rc = 0;
- unsigned int kw_size;
- ssize_t vpd_size;
- char vpd_data[CXLFLASH_VPD_LEN];
- char tmp_buf[WWPN_BUF_LEN] = { 0 };
- const struct dev_dependent_vals *ddv = (struct dev_dependent_vals *)
- cfg->dev_id->driver_data;
- const bool wwpn_vpd_required = ddv->flags & CXLFLASH_WWPN_VPD_REQUIRED;
- const char *wwpn_vpd_tags[MAX_FC_PORTS] = { "V5", "V6", "V7", "V8" };
-
- /* Get the VPD data from the device */
- vpd_size = cfg->ops->read_adapter_vpd(pdev, vpd_data, sizeof(vpd_data));
- if (unlikely(vpd_size <= 0)) {
- dev_err(dev, "%s: Unable to read VPD (size = %ld)\n",
- __func__, vpd_size);
- rc = -ENODEV;
- goto out;
- }
-
- /*
- * Find the offset of the WWPN tag within the read only
- * VPD data and validate the found field (partials are
- * no good to us). Convert the ASCII data to an integer
- * value. Note that we must copy to a temporary buffer
- * because the conversion service requires that the ASCII
- * string be terminated.
- *
- * Allow for WWPN not being found for all devices, setting
- * the returned WWPN to zero when not found. Notify with a
- * log error for cards that should have had WWPN keywords
- * in the VPD - cards requiring WWPN will not have their
- * ports programmed and operate in an undefined state.
- */
- for (k = 0; k < cfg->num_fc_ports; k++) {
- i = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
- wwpn_vpd_tags[k], &kw_size);
- if (i == -ENOENT) {
- if (wwpn_vpd_required)
- dev_err(dev, "%s: Port %d WWPN not found\n",
- __func__, k);
- wwpn[k] = 0ULL;
- continue;
- }
-
- if (i < 0 || kw_size != WWPN_LEN) {
- dev_err(dev, "%s: Port %d WWPN incomplete or bad VPD\n",
- __func__, k);
- rc = -ENODEV;
- goto out;
- }
-
- memcpy(tmp_buf, &vpd_data[i], WWPN_LEN);
- rc = kstrtoul(tmp_buf, WWPN_LEN, (ulong *)&wwpn[k]);
- if (unlikely(rc)) {
- dev_err(dev, "%s: WWPN conversion failed for port %d\n",
- __func__, k);
- rc = -ENODEV;
- goto out;
- }
-
- dev_dbg(dev, "%s: wwpn%d=%016llx\n", __func__, k, wwpn[k]);
- }
-
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * init_pcr() - initialize the provisioning and control registers
- * @cfg: Internal structure associated with the host.
- *
- * Also sets up fast access to the mapped registers and initializes AFU
- * command fields that never change.
- */
-static void init_pcr(struct cxlflash_cfg *cfg)
-{
- struct afu *afu = cfg->afu;
- struct sisl_ctrl_map __iomem *ctrl_map;
- struct hwq *hwq;
- void *cookie;
- int i;
-
- for (i = 0; i < MAX_CONTEXT; i++) {
- ctrl_map = &afu->afu_map->ctrls[i].ctrl;
- /* Disrupt any clients that could be running */
- /* e.g. clients that survived a master restart */
- writeq_be(0, &ctrl_map->rht_start);
- writeq_be(0, &ctrl_map->rht_cnt_id);
- writeq_be(0, &ctrl_map->ctx_cap);
- }
-
- /* Copy frequently used fields into hwq */
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
- cookie = hwq->ctx_cookie;
-
- hwq->ctx_hndl = (u16) cfg->ops->process_element(cookie);
- hwq->host_map = &afu->afu_map->hosts[hwq->ctx_hndl].host;
- hwq->ctrl_map = &afu->afu_map->ctrls[hwq->ctx_hndl].ctrl;
-
- /* Program the Endian Control for the master context */
- writeq_be(SISL_ENDIAN_CTRL, &hwq->host_map->endian_ctrl);
- }
-}
-
-/**
- * init_global() - initialize AFU global registers
- * @cfg: Internal structure associated with the host.
- */
-static int init_global(struct cxlflash_cfg *cfg)
-{
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq;
- struct sisl_host_map __iomem *hmap;
- __be64 __iomem *fc_port_regs;
- u64 wwpn[MAX_FC_PORTS]; /* wwpn of AFU ports */
- int i = 0, num_ports = 0;
- int rc = 0;
- int j;
- void *ctx;
- u64 reg;
-
- rc = read_vpd(cfg, &wwpn[0]);
- if (rc) {
- dev_err(dev, "%s: could not read vpd rc=%d\n", __func__, rc);
- goto out;
- }
-
- /* Set up RRQ and SQ in HWQ for master issued cmds */
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
- hmap = hwq->host_map;
-
- writeq_be((u64) hwq->hrrq_start, &hmap->rrq_start);
- writeq_be((u64) hwq->hrrq_end, &hmap->rrq_end);
- hwq->hrrq_online = true;
-
- if (afu_is_sq_cmd_mode(afu)) {
- writeq_be((u64)hwq->hsq_start, &hmap->sq_start);
- writeq_be((u64)hwq->hsq_end, &hmap->sq_end);
- }
- }
-
- /* AFU configuration */
- reg = readq_be(&afu->afu_map->global.regs.afu_config);
- reg |= SISL_AFUCONF_AR_ALL|SISL_AFUCONF_ENDIAN;
- /* enable all auto retry options and control endianness */
- /* leave others at default: */
- /* CTX_CAP write protected, mbox_r does not clear on read and */
- /* checker on if dual afu */
- writeq_be(reg, &afu->afu_map->global.regs.afu_config);
-
- /* Global port select: select either port */
- if (afu->internal_lun) {
- /* Only use port 0 */
- writeq_be(PORT0, &afu->afu_map->global.regs.afu_port_sel);
- num_ports = 0;
- } else {
- writeq_be(PORT_MASK(cfg->num_fc_ports),
- &afu->afu_map->global.regs.afu_port_sel);
- num_ports = cfg->num_fc_ports;
- }
-
- for (i = 0; i < num_ports; i++) {
- fc_port_regs = get_fc_port_regs(cfg, i);
-
- /* Unmask all errors (but they are still masked at AFU) */
- writeq_be(0, &fc_port_regs[FC_ERRMSK / 8]);
- /* Clear CRC error cnt & set a threshold */
- (void)readq_be(&fc_port_regs[FC_CNT_CRCERR / 8]);
- writeq_be(MC_CRC_THRESH, &fc_port_regs[FC_CRC_THRESH / 8]);
-
- /* Set WWPNs. If already programmed, wwpn[i] is 0 */
- if (wwpn[i] != 0)
- afu_set_wwpn(afu, i, &fc_port_regs[0], wwpn[i]);
- /* Programming WWPN back to back causes additional
- * offline/online transitions and a PLOGI
- */
- msleep(100);
- }
-
- if (afu_is_ocxl_lisn(afu)) {
- /* Set up the LISN effective address for each master */
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
- ctx = hwq->ctx_cookie;
-
- for (j = 0; j < hwq->num_irqs; j++) {
- reg = cfg->ops->get_irq_objhndl(ctx, j);
- writeq_be(reg, &hwq->ctrl_map->lisn_ea[j]);
- }
-
- reg = hwq->ctx_hndl;
- writeq_be(SISL_LISN_PASID(reg, reg),
- &hwq->ctrl_map->lisn_pasid[0]);
- writeq_be(SISL_LISN_PASID(0UL, reg),
- &hwq->ctrl_map->lisn_pasid[1]);
- }
- }
-
- /* Set up master's own CTX_CAP to allow real mode, host translation */
- /* tables, afu cmds and read/write GSCSI cmds. */
- /* First, unlock ctx_cap write by reading mbox */
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
-
- (void)readq_be(&hwq->ctrl_map->mbox_r); /* unlock ctx_cap */
- writeq_be((SISL_CTX_CAP_REAL_MODE | SISL_CTX_CAP_HOST_XLATE |
- SISL_CTX_CAP_READ_CMD | SISL_CTX_CAP_WRITE_CMD |
- SISL_CTX_CAP_AFU_CMD | SISL_CTX_CAP_GSCSI_CMD),
- &hwq->ctrl_map->ctx_cap);
- }
-
- /*
- * Determine write-same unmap support for host by evaluating the unmap
- * sector support bit of the context control register associated with
- * the primary hardware queue. Note that while this status is reflected
- * in a context register, the outcome can be assumed to be host-wide.
- */
- hwq = get_hwq(afu, PRIMARY_HWQ);
- reg = readq_be(&hwq->host_map->ctx_ctrl);
- if (reg & SISL_CTX_CTRL_UNMAP_SECTOR)
- cfg->ws_unmap = true;
-
- /* Initialize heartbeat */
- afu->hb = readq_be(&afu->afu_map->global.regs.afu_hb);
-out:
- return rc;
-}
-
-/**
- * start_afu() - initializes and starts the AFU
- * @cfg: Internal structure associated with the host.
- */
-static int start_afu(struct cxlflash_cfg *cfg)
-{
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq;
- int rc = 0;
- int i;
-
- init_pcr(cfg);
-
- /* Initialize each HWQ */
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
-
- /* After an AFU reset, RRQ entries are stale, clear them */
- memset(&hwq->rrq_entry, 0, sizeof(hwq->rrq_entry));
-
- /* Initialize RRQ pointers */
- hwq->hrrq_start = &hwq->rrq_entry[0];
- hwq->hrrq_end = &hwq->rrq_entry[NUM_RRQ_ENTRY - 1];
- hwq->hrrq_curr = hwq->hrrq_start;
- hwq->toggle = 1;
-
- /* Initialize spin locks */
- spin_lock_init(&hwq->hrrq_slock);
- spin_lock_init(&hwq->hsq_slock);
-
- /* Initialize SQ */
- if (afu_is_sq_cmd_mode(afu)) {
- memset(&hwq->sq, 0, sizeof(hwq->sq));
- hwq->hsq_start = &hwq->sq[0];
- hwq->hsq_end = &hwq->sq[NUM_SQ_ENTRY - 1];
- hwq->hsq_curr = hwq->hsq_start;
-
- atomic_set(&hwq->hsq_credits, NUM_SQ_ENTRY - 1);
- }
-
- /* Initialize IRQ poll */
- if (afu_is_irqpoll_enabled(afu))
- irq_poll_init(&hwq->irqpoll, afu->irqpoll_weight,
- cxlflash_irqpoll);
-
- }
-
- rc = init_global(cfg);
-
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * init_intr() - setup interrupt handlers for the master context
- * @cfg: Internal structure associated with the host.
- * @hwq: Hardware queue to initialize.
- *
- * Return: 0 on success, -errno on failure
- */
-static enum undo_level init_intr(struct cxlflash_cfg *cfg,
- struct hwq *hwq)
-{
- struct device *dev = &cfg->dev->dev;
- void *ctx = hwq->ctx_cookie;
- int rc = 0;
- enum undo_level level = UNDO_NOOP;
- bool is_primary_hwq = (hwq->index == PRIMARY_HWQ);
- int num_irqs = hwq->num_irqs;
-
- rc = cfg->ops->allocate_afu_irqs(ctx, num_irqs);
- if (unlikely(rc)) {
- dev_err(dev, "%s: allocate_afu_irqs failed rc=%d\n",
- __func__, rc);
- level = UNDO_NOOP;
- goto out;
- }
-
- rc = cfg->ops->map_afu_irq(ctx, 1, cxlflash_sync_err_irq, hwq,
- "SISL_MSI_SYNC_ERROR");
- if (unlikely(rc <= 0)) {
- dev_err(dev, "%s: SISL_MSI_SYNC_ERROR map failed\n", __func__);
- level = FREE_IRQ;
- goto out;
- }
-
- rc = cfg->ops->map_afu_irq(ctx, 2, cxlflash_rrq_irq, hwq,
- "SISL_MSI_RRQ_UPDATED");
- if (unlikely(rc <= 0)) {
- dev_err(dev, "%s: SISL_MSI_RRQ_UPDATED map failed\n", __func__);
- level = UNMAP_ONE;
- goto out;
- }
-
- /* SISL_MSI_ASYNC_ERROR is setup only for the primary HWQ */
- if (!is_primary_hwq)
- goto out;
-
- rc = cfg->ops->map_afu_irq(ctx, 3, cxlflash_async_err_irq, hwq,
- "SISL_MSI_ASYNC_ERROR");
- if (unlikely(rc <= 0)) {
- dev_err(dev, "%s: SISL_MSI_ASYNC_ERROR map failed\n", __func__);
- level = UNMAP_TWO;
- goto out;
- }
-out:
- return level;
-}
-
-/**
- * init_mc() - create and register as the master context
- * @cfg: Internal structure associated with the host.
- * @index: HWQ Index of the master context.
- *
- * Return: 0 on success, -errno on failure
- */
-static int init_mc(struct cxlflash_cfg *cfg, u32 index)
-{
- void *ctx;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq = get_hwq(cfg->afu, index);
- int rc = 0;
- int num_irqs;
- enum undo_level level;
-
- hwq->afu = cfg->afu;
- hwq->index = index;
- INIT_LIST_HEAD(&hwq->pending_cmds);
-
- if (index == PRIMARY_HWQ) {
- ctx = cfg->ops->get_context(cfg->dev, cfg->afu_cookie);
- num_irqs = 3;
- } else {
- ctx = cfg->ops->dev_context_init(cfg->dev, cfg->afu_cookie);
- num_irqs = 2;
- }
- if (IS_ERR_OR_NULL(ctx)) {
- rc = -ENOMEM;
- goto err1;
- }
-
- WARN_ON(hwq->ctx_cookie);
- hwq->ctx_cookie = ctx;
- hwq->num_irqs = num_irqs;
-
- /* Set it up as a master with the CXL */
- cfg->ops->set_master(ctx);
-
- /* Reset AFU when initializing primary context */
- if (index == PRIMARY_HWQ) {
- rc = cfg->ops->afu_reset(ctx);
- if (unlikely(rc)) {
- dev_err(dev, "%s: AFU reset failed rc=%d\n",
- __func__, rc);
- goto err1;
- }
- }
-
- level = init_intr(cfg, hwq);
- if (unlikely(level)) {
- dev_err(dev, "%s: interrupt init failed rc=%d\n", __func__, rc);
- goto err2;
- }
-
- /* Finally, activate the context by starting it */
- rc = cfg->ops->start_context(hwq->ctx_cookie);
- if (unlikely(rc)) {
- dev_err(dev, "%s: start context failed rc=%d\n", __func__, rc);
- level = UNMAP_THREE;
- goto err2;
- }
-
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-err2:
- term_intr(cfg, level, index);
- if (index != PRIMARY_HWQ)
- cfg->ops->release_context(ctx);
-err1:
- hwq->ctx_cookie = NULL;
- goto out;
-}
-
-/**
- * get_num_afu_ports() - determines and configures the number of AFU ports
- * @cfg: Internal structure associated with the host.
- *
- * This routine determines the number of AFU ports by converting the global
- * port selection mask. The converted value is only valid following an AFU
- * reset (explicit or power-on). This routine must be invoked shortly after
- * mapping as other routines are dependent on the number of ports during the
- * initialization sequence.
- *
- * To support legacy AFUs that might not have reflected an initial global
- * port mask (value read is 0), default to the number of ports originally
- * supported by the cxlflash driver (2) before hardware with other port
- * offerings was introduced.
- */
-static void get_num_afu_ports(struct cxlflash_cfg *cfg)
-{
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- u64 port_mask;
- int num_fc_ports = LEGACY_FC_PORTS;
-
- port_mask = readq_be(&afu->afu_map->global.regs.afu_port_sel);
- if (port_mask != 0ULL)
- num_fc_ports = min(ilog2(port_mask) + 1, MAX_FC_PORTS);
-
- dev_dbg(dev, "%s: port_mask=%016llx num_fc_ports=%d\n",
- __func__, port_mask, num_fc_ports);
-
- cfg->num_fc_ports = num_fc_ports;
- cfg->host->max_channel = PORTNUM2CHAN(num_fc_ports);
-}
-
-/**
- * init_afu() - setup as master context and start AFU
- * @cfg: Internal structure associated with the host.
- *
- * This routine is a higher level of control for configuring the
- * AFU on probe and reset paths.
- *
- * Return: 0 on success, -errno on failure
- */
-static int init_afu(struct cxlflash_cfg *cfg)
-{
- u64 reg;
- int rc = 0;
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct hwq *hwq;
- int i;
-
- cfg->ops->perst_reloads_same_image(cfg->afu_cookie, true);
-
- mutex_init(&afu->sync_active);
- afu->num_hwqs = afu->desired_hwqs;
- for (i = 0; i < afu->num_hwqs; i++) {
- rc = init_mc(cfg, i);
- if (rc) {
- dev_err(dev, "%s: init_mc failed rc=%d index=%d\n",
- __func__, rc, i);
- goto err1;
- }
- }
-
- /* Map the entire MMIO space of the AFU using the first context */
- hwq = get_hwq(afu, PRIMARY_HWQ);
- afu->afu_map = cfg->ops->psa_map(hwq->ctx_cookie);
- if (!afu->afu_map) {
- dev_err(dev, "%s: psa_map failed\n", __func__);
- rc = -ENOMEM;
- goto err1;
- }
-
- /* No byte reverse on reading afu_version or string will be backwards */
- reg = readq(&afu->afu_map->global.regs.afu_version);
- memcpy(afu->version, ®, sizeof(reg));
- afu->interface_version =
- readq_be(&afu->afu_map->global.regs.interface_version);
- if ((afu->interface_version + 1) == 0) {
- dev_err(dev, "Back level AFU, please upgrade. AFU version %s "
- "interface version %016llx\n", afu->version,
- afu->interface_version);
- rc = -EINVAL;
- goto err1;
- }
-
- if (afu_is_sq_cmd_mode(afu)) {
- afu->send_cmd = send_cmd_sq;
- afu->context_reset = context_reset_sq;
- } else {
- afu->send_cmd = send_cmd_ioarrin;
- afu->context_reset = context_reset_ioarrin;
- }
-
- dev_dbg(dev, "%s: afu_ver=%s interface_ver=%016llx\n", __func__,
- afu->version, afu->interface_version);
-
- get_num_afu_ports(cfg);
-
- rc = start_afu(cfg);
- if (rc) {
- dev_err(dev, "%s: start_afu failed, rc=%d\n", __func__, rc);
- goto err1;
- }
-
- afu_err_intr_init(cfg->afu);
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
-
- hwq->room = readq_be(&hwq->host_map->cmd_room);
- }
-
- /* Restore the LUN mappings */
- cxlflash_restore_luntable(cfg);
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-
-err1:
- for (i = afu->num_hwqs - 1; i >= 0; i--) {
- term_intr(cfg, UNMAP_THREE, i);
- term_mc(cfg, i);
- }
- goto out;
-}
-
-/**
- * afu_reset() - resets the AFU
- * @cfg: Internal structure associated with the host.
- *
- * Return: 0 on success, -errno on failure
- */
-static int afu_reset(struct cxlflash_cfg *cfg)
-{
- struct device *dev = &cfg->dev->dev;
- int rc = 0;
-
- /* Stop the context before the reset. Since the context is
- * no longer available restart it after the reset is complete
- */
- term_afu(cfg);
-
- rc = init_afu(cfg);
-
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * drain_ioctls() - wait until all currently executing ioctls have completed
- * @cfg: Internal structure associated with the host.
- *
- * Obtain write access to read/write semaphore that wraps ioctl
- * handling to 'drain' ioctls currently executing.
- */
-static void drain_ioctls(struct cxlflash_cfg *cfg)
-{
- down_write(&cfg->ioctl_rwsem);
- up_write(&cfg->ioctl_rwsem);
-}
-
-/**
- * cxlflash_async_reset_host() - asynchronous host reset handler
- * @data: Private data provided while scheduling reset.
- * @cookie: Cookie that can be used for checkpointing.
- */
-static void cxlflash_async_reset_host(void *data, async_cookie_t cookie)
-{
- struct cxlflash_cfg *cfg = data;
- struct device *dev = &cfg->dev->dev;
- int rc = 0;
-
- if (cfg->state != STATE_RESET) {
- dev_dbg(dev, "%s: Not performing a reset, state=%d\n",
- __func__, cfg->state);
- goto out;
- }
-
- drain_ioctls(cfg);
- cxlflash_mark_contexts_error(cfg);
- rc = afu_reset(cfg);
- if (rc)
- cfg->state = STATE_FAILTERM;
- else
- cfg->state = STATE_NORMAL;
- wake_up_all(&cfg->reset_waitq);
-
-out:
- scsi_unblock_requests(cfg->host);
-}
-
-/**
- * cxlflash_schedule_async_reset() - schedule an asynchronous host reset
- * @cfg: Internal structure associated with the host.
- */
-static void cxlflash_schedule_async_reset(struct cxlflash_cfg *cfg)
-{
- struct device *dev = &cfg->dev->dev;
-
- if (cfg->state != STATE_NORMAL) {
- dev_dbg(dev, "%s: Not performing reset state=%d\n",
- __func__, cfg->state);
- return;
- }
-
- cfg->state = STATE_RESET;
- scsi_block_requests(cfg->host);
- cfg->async_reset_cookie = async_schedule(cxlflash_async_reset_host,
- cfg);
-}
-
-/**
- * send_afu_cmd() - builds and sends an internal AFU command
- * @afu: AFU associated with the host.
- * @rcb: Pre-populated IOARCB describing command to send.
- *
- * The AFU can only take one internal AFU command at a time. This limitation is
- * enforced by using a mutex to provide exclusive access to the AFU during the
- * operation. This design point requires calling threads to not be on interrupt
- * context due to the possibility of sleeping during concurrent AFU operations.
- *
- * The command status is optionally passed back to the caller when the caller
- * populates the IOASA field of the IOARCB with a pointer to an IOASA structure.
- *
- * Return:
- * 0 on success, -errno on failure
- */
-static int send_afu_cmd(struct afu *afu, struct sisl_ioarcb *rcb)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- struct afu_cmd *cmd = NULL;
- struct hwq *hwq = get_hwq(afu, PRIMARY_HWQ);
- ulong lock_flags;
- char *buf = NULL;
- int rc = 0;
- int nretry = 0;
-
- if (cfg->state != STATE_NORMAL) {
- dev_dbg(dev, "%s: Sync not required state=%u\n",
- __func__, cfg->state);
- return 0;
- }
-
- mutex_lock(&afu->sync_active);
- atomic_inc(&afu->cmds_active);
- buf = kmalloc(sizeof(*cmd) + __alignof__(*cmd) - 1, GFP_KERNEL);
- if (unlikely(!buf)) {
- dev_err(dev, "%s: no memory for command\n", __func__);
- rc = -ENOMEM;
- goto out;
- }
-
- cmd = (struct afu_cmd *)PTR_ALIGN(buf, __alignof__(*cmd));
-
-retry:
- memset(cmd, 0, sizeof(*cmd));
- memcpy(&cmd->rcb, rcb, sizeof(*rcb));
- INIT_LIST_HEAD(&cmd->queue);
- init_completion(&cmd->cevent);
- cmd->parent = afu;
- cmd->hwq_index = hwq->index;
- cmd->rcb.ctx_id = hwq->ctx_hndl;
-
- dev_dbg(dev, "%s: afu=%p cmd=%p type=%02x nretry=%d\n",
- __func__, afu, cmd, cmd->rcb.cdb[0], nretry);
-
- rc = afu->send_cmd(afu, cmd);
- if (unlikely(rc)) {
- rc = -ENOBUFS;
- goto out;
- }
-
- rc = wait_resp(afu, cmd);
- switch (rc) {
- case -ETIMEDOUT:
- rc = afu->context_reset(hwq);
- if (rc) {
- /* Delete the command from pending_cmds list */
- spin_lock_irqsave(&hwq->hsq_slock, lock_flags);
- list_del(&cmd->list);
- spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
-
- cxlflash_schedule_async_reset(cfg);
- break;
- }
- fallthrough; /* to retry */
- case -EAGAIN:
- if (++nretry < 2)
- goto retry;
- fallthrough; /* to exit */
- default:
- break;
- }
-
- if (rcb->ioasa)
- *rcb->ioasa = cmd->sa;
-out:
- atomic_dec(&afu->cmds_active);
- mutex_unlock(&afu->sync_active);
- kfree(buf);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * cxlflash_afu_sync() - builds and sends an AFU sync command
- * @afu: AFU associated with the host.
- * @ctx: Identifies context requesting sync.
- * @res: Identifies resource requesting sync.
- * @mode: Type of sync to issue (lightweight, heavyweight, global).
- *
- * AFU sync operations are only necessary and allowed when the device is
- * operating normally. When not operating normally, sync requests can occur as
- * part of cleaning up resources associated with an adapter prior to removal.
- * In this scenario, these requests are simply ignored (safe due to the AFU
- * going away).
- *
- * Return:
- * 0 on success, -errno on failure
- */
-int cxlflash_afu_sync(struct afu *afu, ctx_hndl_t ctx, res_hndl_t res, u8 mode)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- struct sisl_ioarcb rcb = { 0 };
-
- dev_dbg(dev, "%s: afu=%p ctx=%u res=%u mode=%u\n",
- __func__, afu, ctx, res, mode);
-
- rcb.req_flags = SISL_REQ_FLAGS_AFU_CMD;
- rcb.msi = SISL_MSI_RRQ_UPDATED;
- rcb.timeout = MC_AFU_SYNC_TIMEOUT;
-
- rcb.cdb[0] = SISL_AFU_CMD_SYNC;
- rcb.cdb[1] = mode;
- put_unaligned_be16(ctx, &rcb.cdb[2]);
- put_unaligned_be32(res, &rcb.cdb[4]);
-
- return send_afu_cmd(afu, &rcb);
-}
-
-/**
- * cxlflash_eh_abort_handler() - abort a SCSI command
- * @scp: SCSI command to abort.
- *
- * CXL Flash devices do not support a single command abort. Reset the context
- * as per SISLite specification. Flush any pending commands in the hardware
- * queue before the reset.
- *
- * Return: SUCCESS/FAILED as defined in scsi/scsi.h
- */
-static int cxlflash_eh_abort_handler(struct scsi_cmnd *scp)
-{
- int rc = FAILED;
- struct Scsi_Host *host = scp->device->host;
- struct cxlflash_cfg *cfg = shost_priv(host);
- struct afu_cmd *cmd = sc_to_afuc(scp);
- struct device *dev = &cfg->dev->dev;
- struct afu *afu = cfg->afu;
- struct hwq *hwq = get_hwq(afu, cmd->hwq_index);
-
- dev_dbg(dev, "%s: (scp=%p) %d/%d/%d/%llu "
- "cdb=(%08x-%08x-%08x-%08x)\n", __func__, scp, host->host_no,
- scp->device->channel, scp->device->id, scp->device->lun,
- get_unaligned_be32(&((u32 *)scp->cmnd)[0]),
- get_unaligned_be32(&((u32 *)scp->cmnd)[1]),
- get_unaligned_be32(&((u32 *)scp->cmnd)[2]),
- get_unaligned_be32(&((u32 *)scp->cmnd)[3]));
-
- /* When the state is not normal, another reset/reload is in progress.
- * Return failed and the mid-layer will invoke host reset handler.
- */
- if (cfg->state != STATE_NORMAL) {
- dev_dbg(dev, "%s: Invalid state for abort, state=%d\n",
- __func__, cfg->state);
- goto out;
- }
-
- rc = afu->context_reset(hwq);
- if (unlikely(rc))
- goto out;
-
- rc = SUCCESS;
-
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * cxlflash_eh_device_reset_handler() - reset a single LUN
- * @scp: SCSI command to send.
- *
- * Return:
- * SUCCESS as defined in scsi/scsi.h
- * FAILED as defined in scsi/scsi.h
- */
-static int cxlflash_eh_device_reset_handler(struct scsi_cmnd *scp)
-{
- int rc = SUCCESS;
- struct scsi_device *sdev = scp->device;
- struct Scsi_Host *host = sdev->host;
- struct cxlflash_cfg *cfg = shost_priv(host);
- struct device *dev = &cfg->dev->dev;
- int rcr = 0;
-
- dev_dbg(dev, "%s: %d/%d/%d/%llu\n", __func__,
- host->host_no, sdev->channel, sdev->id, sdev->lun);
-retry:
- switch (cfg->state) {
- case STATE_NORMAL:
- rcr = send_tmf(cfg, sdev, TMF_LUN_RESET);
- if (unlikely(rcr))
- rc = FAILED;
- break;
- case STATE_RESET:
- wait_event(cfg->reset_waitq, cfg->state != STATE_RESET);
- goto retry;
- default:
- rc = FAILED;
- break;
- }
-
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * cxlflash_eh_host_reset_handler() - reset the host adapter
- * @scp: SCSI command from stack identifying host.
- *
- * Following a reset, the state is evaluated again in case an EEH occurred
- * during the reset. In such a scenario, the host reset will either yield
- * until the EEH recovery is complete or return success or failure based
- * upon the current device state.
- *
- * Return:
- * SUCCESS as defined in scsi/scsi.h
- * FAILED as defined in scsi/scsi.h
- */
-static int cxlflash_eh_host_reset_handler(struct scsi_cmnd *scp)
-{
- int rc = SUCCESS;
- int rcr = 0;
- struct Scsi_Host *host = scp->device->host;
- struct cxlflash_cfg *cfg = shost_priv(host);
- struct device *dev = &cfg->dev->dev;
-
- dev_dbg(dev, "%s: %d\n", __func__, host->host_no);
-
- switch (cfg->state) {
- case STATE_NORMAL:
- cfg->state = STATE_RESET;
- drain_ioctls(cfg);
- cxlflash_mark_contexts_error(cfg);
- rcr = afu_reset(cfg);
- if (rcr) {
- rc = FAILED;
- cfg->state = STATE_FAILTERM;
- } else
- cfg->state = STATE_NORMAL;
- wake_up_all(&cfg->reset_waitq);
- ssleep(1);
- fallthrough;
- case STATE_RESET:
- wait_event(cfg->reset_waitq, cfg->state != STATE_RESET);
- if (cfg->state == STATE_NORMAL)
- break;
- fallthrough;
- default:
- rc = FAILED;
- break;
- }
-
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * cxlflash_change_queue_depth() - change the queue depth for the device
- * @sdev: SCSI device destined for queue depth change.
- * @qdepth: Requested queue depth value to set.
- *
- * The requested queue depth is capped to the maximum supported value.
- *
- * Return: The actual queue depth set.
- */
-static int cxlflash_change_queue_depth(struct scsi_device *sdev, int qdepth)
-{
-
- if (qdepth > CXLFLASH_MAX_CMDS_PER_LUN)
- qdepth = CXLFLASH_MAX_CMDS_PER_LUN;
-
- scsi_change_queue_depth(sdev, qdepth);
- return sdev->queue_depth;
-}
-
-/**
- * cxlflash_show_port_status() - queries and presents the current port status
- * @port: Desired port for status reporting.
- * @cfg: Internal structure associated with the host.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf or -EINVAL.
- */
-static ssize_t cxlflash_show_port_status(u32 port,
- struct cxlflash_cfg *cfg,
- char *buf)
-{
- struct device *dev = &cfg->dev->dev;
- char *disp_status;
- u64 status;
- __be64 __iomem *fc_port_regs;
-
- WARN_ON(port >= MAX_FC_PORTS);
-
- if (port >= cfg->num_fc_ports) {
- dev_info(dev, "%s: Port %d not supported on this card.\n",
- __func__, port);
- return -EINVAL;
- }
-
- fc_port_regs = get_fc_port_regs(cfg, port);
- status = readq_be(&fc_port_regs[FC_MTIP_STATUS / 8]);
- status &= FC_MTIP_STATUS_MASK;
-
- if (status == FC_MTIP_STATUS_ONLINE)
- disp_status = "online";
- else if (status == FC_MTIP_STATUS_OFFLINE)
- disp_status = "offline";
- else
- disp_status = "unknown";
-
- return scnprintf(buf, PAGE_SIZE, "%s\n", disp_status);
-}
-
-/**
- * port0_show() - queries and presents the current status of port 0
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port0_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_status(0, cfg, buf);
-}
-
-/**
- * port1_show() - queries and presents the current status of port 1
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port1_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_status(1, cfg, buf);
-}
-
-/**
- * port2_show() - queries and presents the current status of port 2
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port2_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_status(2, cfg, buf);
-}
-
-/**
- * port3_show() - queries and presents the current status of port 3
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port3_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_status(3, cfg, buf);
-}
-
-/**
- * lun_mode_show() - presents the current LUN mode of the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the LUN mode.
- * @buf: Buffer of length PAGE_SIZE to report back the LUN mode in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t lun_mode_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
- struct afu *afu = cfg->afu;
-
- return scnprintf(buf, PAGE_SIZE, "%u\n", afu->internal_lun);
-}
-
-/**
- * lun_mode_store() - sets the LUN mode of the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the LUN mode.
- * @buf: Buffer of length PAGE_SIZE containing the LUN mode in ASCII.
- * @count: Length of data resizing in @buf.
- *
- * The CXL Flash AFU supports a dummy LUN mode where the external
- * links and storage are not required. Space on the FPGA is used
- * to create 1 or 2 small LUNs which are presented to the system
- * as if they were a normal storage device. This feature is useful
- * during development and also provides manufacturing with a way
- * to test the AFU without an actual device.
- *
- * 0 = external LUN[s] (default)
- * 1 = internal LUN (1 x 64K, 512B blocks, id 0)
- * 2 = internal LUN (1 x 64K, 4K blocks, id 0)
- * 3 = internal LUN (2 x 32K, 512B blocks, ids 0,1)
- * 4 = internal LUN (2 x 32K, 4K blocks, ids 0,1)
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t lun_mode_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct Scsi_Host *shost = class_to_shost(dev);
- struct cxlflash_cfg *cfg = shost_priv(shost);
- struct afu *afu = cfg->afu;
- int rc;
- u32 lun_mode;
-
- rc = kstrtouint(buf, 10, &lun_mode);
- if (!rc && (lun_mode < 5) && (lun_mode != afu->internal_lun)) {
- afu->internal_lun = lun_mode;
-
- /*
- * When configured for internal LUN, there is only one channel,
- * channel number 0, else there will be one less than the number
- * of fc ports for this card.
- */
- if (afu->internal_lun)
- shost->max_channel = 0;
- else
- shost->max_channel = PORTNUM2CHAN(cfg->num_fc_ports);
-
- afu_reset(cfg);
- scsi_scan_host(cfg->host);
- }
-
- return count;
-}
-
-/**
- * ioctl_version_show() - presents the current ioctl version of the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the ioctl version.
- * @buf: Buffer of length PAGE_SIZE to report back the ioctl version.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t ioctl_version_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- ssize_t bytes = 0;
-
- bytes = scnprintf(buf, PAGE_SIZE,
- "disk: %u\n", DK_CXLFLASH_VERSION_0);
- bytes += scnprintf(buf + bytes, PAGE_SIZE - bytes,
- "host: %u\n", HT_CXLFLASH_VERSION_0);
-
- return bytes;
-}
-
-/**
- * cxlflash_show_port_lun_table() - queries and presents the port LUN table
- * @port: Desired port for status reporting.
- * @cfg: Internal structure associated with the host.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf or -EINVAL.
- */
-static ssize_t cxlflash_show_port_lun_table(u32 port,
- struct cxlflash_cfg *cfg,
- char *buf)
-{
- struct device *dev = &cfg->dev->dev;
- __be64 __iomem *fc_port_luns;
- int i;
- ssize_t bytes = 0;
-
- WARN_ON(port >= MAX_FC_PORTS);
-
- if (port >= cfg->num_fc_ports) {
- dev_info(dev, "%s: Port %d not supported on this card.\n",
- __func__, port);
- return -EINVAL;
- }
-
- fc_port_luns = get_fc_port_luns(cfg, port);
-
- for (i = 0; i < CXLFLASH_NUM_VLUNS; i++)
- bytes += scnprintf(buf + bytes, PAGE_SIZE - bytes,
- "%03d: %016llx\n",
- i, readq_be(&fc_port_luns[i]));
- return bytes;
-}
-
-/**
- * port0_lun_table_show() - presents the current LUN table of port 0
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port0_lun_table_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_lun_table(0, cfg, buf);
-}
-
-/**
- * port1_lun_table_show() - presents the current LUN table of port 1
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port1_lun_table_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_lun_table(1, cfg, buf);
-}
-
-/**
- * port2_lun_table_show() - presents the current LUN table of port 2
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port2_lun_table_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_lun_table(2, cfg, buf);
-}
-
-/**
- * port3_lun_table_show() - presents the current LUN table of port 3
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
- * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t port3_lun_table_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
-
- return cxlflash_show_port_lun_table(3, cfg, buf);
-}
-
-/**
- * irqpoll_weight_show() - presents the current IRQ poll weight for the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the IRQ poll weight.
- * @buf: Buffer of length PAGE_SIZE to report back the current IRQ poll
- * weight in ASCII.
- *
- * An IRQ poll weight of 0 indicates polling is disabled.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t irqpoll_weight_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
- struct afu *afu = cfg->afu;
-
- return scnprintf(buf, PAGE_SIZE, "%u\n", afu->irqpoll_weight);
-}
-
-/**
- * irqpoll_weight_store() - sets the current IRQ poll weight for the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the IRQ poll weight.
- * @buf: Buffer of length PAGE_SIZE containing the desired IRQ poll
- * weight in ASCII.
- * @count: Length of data resizing in @buf.
- *
- * An IRQ poll weight of 0 indicates polling is disabled.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t irqpoll_weight_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
- struct device *cfgdev = &cfg->dev->dev;
- struct afu *afu = cfg->afu;
- struct hwq *hwq;
- u32 weight;
- int rc, i;
-
- rc = kstrtouint(buf, 10, &weight);
- if (rc)
- return -EINVAL;
-
- if (weight > 256) {
- dev_info(cfgdev,
- "Invalid IRQ poll weight. It must be 256 or less.\n");
- return -EINVAL;
- }
-
- if (weight == afu->irqpoll_weight) {
- dev_info(cfgdev,
- "Current IRQ poll weight has the same weight.\n");
- return -EINVAL;
- }
-
- if (afu_is_irqpoll_enabled(afu)) {
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
-
- irq_poll_disable(&hwq->irqpoll);
- }
- }
-
- afu->irqpoll_weight = weight;
-
- if (weight > 0) {
- for (i = 0; i < afu->num_hwqs; i++) {
- hwq = get_hwq(afu, i);
-
- irq_poll_init(&hwq->irqpoll, weight, cxlflash_irqpoll);
- }
- }
-
- return count;
-}
-
-/**
- * num_hwqs_show() - presents the number of hardware queues for the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the number of hardware queues.
- * @buf: Buffer of length PAGE_SIZE to report back the number of hardware
- * queues in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t num_hwqs_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
- struct afu *afu = cfg->afu;
-
- return scnprintf(buf, PAGE_SIZE, "%u\n", afu->num_hwqs);
-}
-
-/**
- * num_hwqs_store() - sets the number of hardware queues for the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the number of hardware queues.
- * @buf: Buffer of length PAGE_SIZE containing the number of hardware
- * queues in ASCII.
- * @count: Length of data resizing in @buf.
- *
- * n > 0: num_hwqs = n
- * n = 0: num_hwqs = num_online_cpus()
- * n < 0: num_online_cpus() / abs(n)
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t num_hwqs_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
- struct afu *afu = cfg->afu;
- int rc;
- int nhwqs, num_hwqs;
-
- rc = kstrtoint(buf, 10, &nhwqs);
- if (rc)
- return -EINVAL;
-
- if (nhwqs >= 1)
- num_hwqs = nhwqs;
- else if (nhwqs == 0)
- num_hwqs = num_online_cpus();
- else
- num_hwqs = num_online_cpus() / abs(nhwqs);
-
- afu->desired_hwqs = min(num_hwqs, CXLFLASH_MAX_HWQS);
- WARN_ON_ONCE(afu->desired_hwqs == 0);
-
-retry:
- switch (cfg->state) {
- case STATE_NORMAL:
- cfg->state = STATE_RESET;
- drain_ioctls(cfg);
- cxlflash_mark_contexts_error(cfg);
- rc = afu_reset(cfg);
- if (rc)
- cfg->state = STATE_FAILTERM;
- else
- cfg->state = STATE_NORMAL;
- wake_up_all(&cfg->reset_waitq);
- break;
- case STATE_RESET:
- wait_event(cfg->reset_waitq, cfg->state != STATE_RESET);
- if (cfg->state == STATE_NORMAL)
- goto retry;
- fallthrough;
- default:
- /* Ideally should not happen */
- dev_err(dev, "%s: Device is not ready, state=%d\n",
- __func__, cfg->state);
- break;
- }
-
- return count;
-}
-
-static const char *hwq_mode_name[MAX_HWQ_MODE] = { "rr", "tag", "cpu" };
-
-/**
- * hwq_mode_show() - presents the HWQ steering mode for the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the HWQ steering mode.
- * @buf: Buffer of length PAGE_SIZE to report back the HWQ steering mode
- * as a character string.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t hwq_mode_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct cxlflash_cfg *cfg = shost_priv(class_to_shost(dev));
- struct afu *afu = cfg->afu;
-
- return scnprintf(buf, PAGE_SIZE, "%s\n", hwq_mode_name[afu->hwq_mode]);
-}
-
-/**
- * hwq_mode_store() - sets the HWQ steering mode for the host
- * @dev: Generic device associated with the host.
- * @attr: Device attribute representing the HWQ steering mode.
- * @buf: Buffer of length PAGE_SIZE containing the HWQ steering mode
- * as a character string.
- * @count: Length of data resizing in @buf.
- *
- * rr = Round-Robin
- * tag = Block MQ Tagging
- * cpu = CPU Affinity
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t hwq_mode_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct Scsi_Host *shost = class_to_shost(dev);
- struct cxlflash_cfg *cfg = shost_priv(shost);
- struct device *cfgdev = &cfg->dev->dev;
- struct afu *afu = cfg->afu;
- int i;
- u32 mode = MAX_HWQ_MODE;
-
- for (i = 0; i < MAX_HWQ_MODE; i++) {
- if (!strncmp(hwq_mode_name[i], buf, strlen(hwq_mode_name[i]))) {
- mode = i;
- break;
- }
- }
-
- if (mode >= MAX_HWQ_MODE) {
- dev_info(cfgdev, "Invalid HWQ steering mode.\n");
- return -EINVAL;
- }
-
- afu->hwq_mode = mode;
-
- return count;
-}
-
-/**
- * mode_show() - presents the current mode of the device
- * @dev: Generic device associated with the device.
- * @attr: Device attribute representing the device mode.
- * @buf: Buffer of length PAGE_SIZE to report back the dev mode in ASCII.
- *
- * Return: The size of the ASCII string returned in @buf.
- */
-static ssize_t mode_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct scsi_device *sdev = to_scsi_device(dev);
-
- return scnprintf(buf, PAGE_SIZE, "%s\n",
- sdev->hostdata ? "superpipe" : "legacy");
-}
-
-/*
- * Host attributes
- */
-static DEVICE_ATTR_RO(port0);
-static DEVICE_ATTR_RO(port1);
-static DEVICE_ATTR_RO(port2);
-static DEVICE_ATTR_RO(port3);
-static DEVICE_ATTR_RW(lun_mode);
-static DEVICE_ATTR_RO(ioctl_version);
-static DEVICE_ATTR_RO(port0_lun_table);
-static DEVICE_ATTR_RO(port1_lun_table);
-static DEVICE_ATTR_RO(port2_lun_table);
-static DEVICE_ATTR_RO(port3_lun_table);
-static DEVICE_ATTR_RW(irqpoll_weight);
-static DEVICE_ATTR_RW(num_hwqs);
-static DEVICE_ATTR_RW(hwq_mode);
-
-static struct attribute *cxlflash_host_attrs[] = {
- &dev_attr_port0.attr,
- &dev_attr_port1.attr,
- &dev_attr_port2.attr,
- &dev_attr_port3.attr,
- &dev_attr_lun_mode.attr,
- &dev_attr_ioctl_version.attr,
- &dev_attr_port0_lun_table.attr,
- &dev_attr_port1_lun_table.attr,
- &dev_attr_port2_lun_table.attr,
- &dev_attr_port3_lun_table.attr,
- &dev_attr_irqpoll_weight.attr,
- &dev_attr_num_hwqs.attr,
- &dev_attr_hwq_mode.attr,
- NULL
-};
-
-ATTRIBUTE_GROUPS(cxlflash_host);
-
-/*
- * Device attributes
- */
-static DEVICE_ATTR_RO(mode);
-
-static struct attribute *cxlflash_dev_attrs[] = {
- &dev_attr_mode.attr,
- NULL
-};
-
-ATTRIBUTE_GROUPS(cxlflash_dev);
-
-/*
- * Host template
- */
-static struct scsi_host_template driver_template = {
- .module = THIS_MODULE,
- .name = CXLFLASH_ADAPTER_NAME,
- .info = cxlflash_driver_info,
- .ioctl = cxlflash_ioctl,
- .proc_name = CXLFLASH_NAME,
- .queuecommand = cxlflash_queuecommand,
- .eh_abort_handler = cxlflash_eh_abort_handler,
- .eh_device_reset_handler = cxlflash_eh_device_reset_handler,
- .eh_host_reset_handler = cxlflash_eh_host_reset_handler,
- .change_queue_depth = cxlflash_change_queue_depth,
- .cmd_per_lun = CXLFLASH_MAX_CMDS_PER_LUN,
- .can_queue = CXLFLASH_MAX_CMDS,
- .cmd_size = sizeof(struct afu_cmd) + __alignof__(struct afu_cmd) - 1,
- .this_id = -1,
- .sg_tablesize = 1, /* No scatter gather support */
- .max_sectors = CXLFLASH_MAX_SECTORS,
- .shost_groups = cxlflash_host_groups,
- .sdev_groups = cxlflash_dev_groups,
-};
-
-/*
- * Device dependent values
- */
-static struct dev_dependent_vals dev_corsa_vals = { CXLFLASH_MAX_SECTORS,
- CXLFLASH_WWPN_VPD_REQUIRED };
-static struct dev_dependent_vals dev_flash_gt_vals = { CXLFLASH_MAX_SECTORS,
- CXLFLASH_NOTIFY_SHUTDOWN };
-static struct dev_dependent_vals dev_briard_vals = { CXLFLASH_MAX_SECTORS,
- (CXLFLASH_NOTIFY_SHUTDOWN |
- CXLFLASH_OCXL_DEV) };
-
-/*
- * PCI device binding table
- */
-static const struct pci_device_id cxlflash_pci_table[] = {
- {PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CORSA,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0, (kernel_ulong_t)&dev_corsa_vals},
- {PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_FLASH_GT,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0, (kernel_ulong_t)&dev_flash_gt_vals},
- {PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_BRIARD,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0, (kernel_ulong_t)&dev_briard_vals},
- {}
-};
-
-MODULE_DEVICE_TABLE(pci, cxlflash_pci_table);
-
-/**
- * cxlflash_worker_thread() - work thread handler for the AFU
- * @work: Work structure contained within cxlflash associated with host.
- *
- * Handles the following events:
- * - Link reset which cannot be performed on interrupt context due to
- * blocking up to a few seconds
- * - Rescan the host
- */
-static void cxlflash_worker_thread(struct work_struct *work)
-{
- struct cxlflash_cfg *cfg = container_of(work, struct cxlflash_cfg,
- work_q);
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- __be64 __iomem *fc_port_regs;
- int port;
- ulong lock_flags;
-
- /* Avoid MMIO if the device has failed */
-
- if (cfg->state != STATE_NORMAL)
- return;
-
- spin_lock_irqsave(cfg->host->host_lock, lock_flags);
-
- if (cfg->lr_state == LINK_RESET_REQUIRED) {
- port = cfg->lr_port;
- if (port < 0)
- dev_err(dev, "%s: invalid port index %d\n",
- __func__, port);
- else {
- spin_unlock_irqrestore(cfg->host->host_lock,
- lock_flags);
-
- /* The reset can block... */
- fc_port_regs = get_fc_port_regs(cfg, port);
- afu_link_reset(afu, port, fc_port_regs);
- spin_lock_irqsave(cfg->host->host_lock, lock_flags);
- }
-
- cfg->lr_state = LINK_RESET_COMPLETE;
- }
-
- spin_unlock_irqrestore(cfg->host->host_lock, lock_flags);
-
- if (atomic_dec_if_positive(&cfg->scan_host_needed) >= 0)
- scsi_scan_host(cfg->host);
-}
-
-/**
- * cxlflash_chr_open() - character device open handler
- * @inode: Device inode associated with this character device.
- * @file: File pointer for this device.
- *
- * Only users with admin privileges are allowed to open the character device.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_chr_open(struct inode *inode, struct file *file)
-{
- struct cxlflash_cfg *cfg;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
-
- cfg = container_of(inode->i_cdev, struct cxlflash_cfg, cdev);
- file->private_data = cfg;
-
- return 0;
-}
-
-/**
- * decode_hioctl() - translates encoded host ioctl to easily identifiable string
- * @cmd: The host ioctl command to decode.
- *
- * Return: A string identifying the decoded host ioctl.
- */
-static char *decode_hioctl(unsigned int cmd)
-{
- switch (cmd) {
- case HT_CXLFLASH_LUN_PROVISION:
- return __stringify_1(HT_CXLFLASH_LUN_PROVISION);
- }
-
- return "UNKNOWN";
-}
-
-/**
- * cxlflash_lun_provision() - host LUN provisioning handler
- * @cfg: Internal structure associated with the host.
- * @arg: Kernel copy of userspace ioctl data structure.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_lun_provision(struct cxlflash_cfg *cfg, void *arg)
-{
- struct ht_cxlflash_lun_provision *lunprov = arg;
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct sisl_ioarcb rcb;
- struct sisl_ioasa asa;
- __be64 __iomem *fc_port_regs;
- u16 port = lunprov->port;
- u16 scmd = lunprov->hdr.subcmd;
- u16 type;
- u64 reg;
- u64 size;
- u64 lun_id;
- int rc = 0;
-
- if (!afu_is_lun_provision(afu)) {
- rc = -ENOTSUPP;
- goto out;
- }
-
- if (port >= cfg->num_fc_ports) {
- rc = -EINVAL;
- goto out;
- }
-
- switch (scmd) {
- case HT_CXLFLASH_LUN_PROVISION_SUBCMD_CREATE_LUN:
- type = SISL_AFU_LUN_PROVISION_CREATE;
- size = lunprov->size;
- lun_id = 0;
- break;
- case HT_CXLFLASH_LUN_PROVISION_SUBCMD_DELETE_LUN:
- type = SISL_AFU_LUN_PROVISION_DELETE;
- size = 0;
- lun_id = lunprov->lun_id;
- break;
- case HT_CXLFLASH_LUN_PROVISION_SUBCMD_QUERY_PORT:
- fc_port_regs = get_fc_port_regs(cfg, port);
-
- reg = readq_be(&fc_port_regs[FC_MAX_NUM_LUNS / 8]);
- lunprov->max_num_luns = reg;
- reg = readq_be(&fc_port_regs[FC_CUR_NUM_LUNS / 8]);
- lunprov->cur_num_luns = reg;
- reg = readq_be(&fc_port_regs[FC_MAX_CAP_PORT / 8]);
- lunprov->max_cap_port = reg;
- reg = readq_be(&fc_port_regs[FC_CUR_CAP_PORT / 8]);
- lunprov->cur_cap_port = reg;
-
- goto out;
- default:
- rc = -EINVAL;
- goto out;
- }
-
- memset(&rcb, 0, sizeof(rcb));
- memset(&asa, 0, sizeof(asa));
- rcb.req_flags = SISL_REQ_FLAGS_AFU_CMD;
- rcb.lun_id = lun_id;
- rcb.msi = SISL_MSI_RRQ_UPDATED;
- rcb.timeout = MC_LUN_PROV_TIMEOUT;
- rcb.ioasa = &asa;
-
- rcb.cdb[0] = SISL_AFU_CMD_LUN_PROVISION;
- rcb.cdb[1] = type;
- rcb.cdb[2] = port;
- put_unaligned_be64(size, &rcb.cdb[8]);
-
- rc = send_afu_cmd(afu, &rcb);
- if (rc) {
- dev_err(dev, "%s: send_afu_cmd failed rc=%d asc=%08x afux=%x\n",
- __func__, rc, asa.ioasc, asa.afu_extra);
- goto out;
- }
-
- if (scmd == HT_CXLFLASH_LUN_PROVISION_SUBCMD_CREATE_LUN) {
- lunprov->lun_id = (u64)asa.lunid_hi << 32 | asa.lunid_lo;
- memcpy(lunprov->wwid, asa.wwid, sizeof(lunprov->wwid));
- }
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * cxlflash_afu_debug() - host AFU debug handler
- * @cfg: Internal structure associated with the host.
- * @arg: Kernel copy of userspace ioctl data structure.
- *
- * For debug requests requiring a data buffer, always provide an aligned
- * (cache line) buffer to the AFU to appease any alignment requirements.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_afu_debug(struct cxlflash_cfg *cfg, void *arg)
-{
- struct ht_cxlflash_afu_debug *afu_dbg = arg;
- struct afu *afu = cfg->afu;
- struct device *dev = &cfg->dev->dev;
- struct sisl_ioarcb rcb;
- struct sisl_ioasa asa;
- char *buf = NULL;
- char *kbuf = NULL;
- void __user *ubuf = (__force void __user *)afu_dbg->data_ea;
- u16 req_flags = SISL_REQ_FLAGS_AFU_CMD;
- u32 ulen = afu_dbg->data_len;
- bool is_write = afu_dbg->hdr.flags & HT_CXLFLASH_HOST_WRITE;
- int rc = 0;
-
- if (!afu_is_afu_debug(afu)) {
- rc = -ENOTSUPP;
- goto out;
- }
-
- if (ulen) {
- req_flags |= SISL_REQ_FLAGS_SUP_UNDERRUN;
-
- if (ulen > HT_CXLFLASH_AFU_DEBUG_MAX_DATA_LEN) {
- rc = -EINVAL;
- goto out;
- }
-
- buf = kmalloc(ulen + cache_line_size() - 1, GFP_KERNEL);
- if (unlikely(!buf)) {
- rc = -ENOMEM;
- goto out;
- }
-
- kbuf = PTR_ALIGN(buf, cache_line_size());
-
- if (is_write) {
- req_flags |= SISL_REQ_FLAGS_HOST_WRITE;
-
- if (copy_from_user(kbuf, ubuf, ulen)) {
- rc = -EFAULT;
- goto out;
- }
- }
- }
-
- memset(&rcb, 0, sizeof(rcb));
- memset(&asa, 0, sizeof(asa));
-
- rcb.req_flags = req_flags;
- rcb.msi = SISL_MSI_RRQ_UPDATED;
- rcb.timeout = MC_AFU_DEBUG_TIMEOUT;
- rcb.ioasa = &asa;
-
- if (ulen) {
- rcb.data_len = ulen;
- rcb.data_ea = (uintptr_t)kbuf;
- }
-
- rcb.cdb[0] = SISL_AFU_CMD_DEBUG;
- memcpy(&rcb.cdb[4], afu_dbg->afu_subcmd,
- HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN);
-
- rc = send_afu_cmd(afu, &rcb);
- if (rc) {
- dev_err(dev, "%s: send_afu_cmd failed rc=%d asc=%08x afux=%x\n",
- __func__, rc, asa.ioasc, asa.afu_extra);
- goto out;
- }
-
- if (ulen && !is_write) {
- if (copy_to_user(ubuf, kbuf, ulen))
- rc = -EFAULT;
- }
-out:
- kfree(buf);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * cxlflash_chr_ioctl() - character device IOCTL handler
- * @file: File pointer for this device.
- * @cmd: IOCTL command.
- * @arg: Userspace ioctl data structure.
- *
- * A read/write semaphore is used to implement a 'drain' of currently
- * running ioctls. The read semaphore is taken at the beginning of each
- * ioctl thread and released upon concluding execution. Additionally the
- * semaphore should be released and then reacquired in any ioctl execution
- * path which will wait for an event to occur that is outside the scope of
- * the ioctl (i.e. an adapter reset). To drain the ioctls currently running,
- * a thread simply needs to acquire the write semaphore.
- *
- * Return: 0 on success, -errno on failure
- */
-static long cxlflash_chr_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- typedef int (*hioctl) (struct cxlflash_cfg *, void *);
-
- struct cxlflash_cfg *cfg = file->private_data;
- struct device *dev = &cfg->dev->dev;
- char buf[sizeof(union cxlflash_ht_ioctls)];
- void __user *uarg = (void __user *)arg;
- struct ht_cxlflash_hdr *hdr;
- size_t size = 0;
- bool known_ioctl = false;
- int idx = 0;
- int rc = 0;
- hioctl do_ioctl = NULL;
-
- static const struct {
- size_t size;
- hioctl ioctl;
- } ioctl_tbl[] = { /* NOTE: order matters here */
- { sizeof(struct ht_cxlflash_lun_provision), cxlflash_lun_provision },
- { sizeof(struct ht_cxlflash_afu_debug), cxlflash_afu_debug },
- };
-
- /* Hold read semaphore so we can drain if needed */
- down_read(&cfg->ioctl_rwsem);
-
- dev_dbg(dev, "%s: cmd=%u idx=%d tbl_size=%lu\n",
- __func__, cmd, idx, sizeof(ioctl_tbl));
-
- switch (cmd) {
- case HT_CXLFLASH_LUN_PROVISION:
- case HT_CXLFLASH_AFU_DEBUG:
- known_ioctl = true;
- idx = _IOC_NR(HT_CXLFLASH_LUN_PROVISION) - _IOC_NR(cmd);
- size = ioctl_tbl[idx].size;
- do_ioctl = ioctl_tbl[idx].ioctl;
-
- if (likely(do_ioctl))
- break;
-
- fallthrough;
- default:
- rc = -EINVAL;
- goto out;
- }
-
- if (unlikely(copy_from_user(&buf, uarg, size))) {
- dev_err(dev, "%s: copy_from_user() fail "
- "size=%lu cmd=%d (%s) uarg=%p\n",
- __func__, size, cmd, decode_hioctl(cmd), uarg);
- rc = -EFAULT;
- goto out;
- }
-
- hdr = (struct ht_cxlflash_hdr *)&buf;
- if (hdr->version != HT_CXLFLASH_VERSION_0) {
- dev_dbg(dev, "%s: Version %u not supported for %s\n",
- __func__, hdr->version, decode_hioctl(cmd));
- rc = -EINVAL;
- goto out;
- }
-
- if (hdr->rsvd[0] || hdr->rsvd[1] || hdr->return_flags) {
- dev_dbg(dev, "%s: Reserved/rflags populated\n", __func__);
- rc = -EINVAL;
- goto out;
- }
-
- rc = do_ioctl(cfg, (void *)&buf);
- if (likely(!rc))
- if (unlikely(copy_to_user(uarg, &buf, size))) {
- dev_err(dev, "%s: copy_to_user() fail "
- "size=%lu cmd=%d (%s) uarg=%p\n",
- __func__, size, cmd, decode_hioctl(cmd), uarg);
- rc = -EFAULT;
- }
-
- /* fall through to exit */
-
-out:
- up_read(&cfg->ioctl_rwsem);
- if (unlikely(rc && known_ioctl))
- dev_err(dev, "%s: ioctl %s (%08X) returned rc=%d\n",
- __func__, decode_hioctl(cmd), cmd, rc);
- else
- dev_dbg(dev, "%s: ioctl %s (%08X) returned rc=%d\n",
- __func__, decode_hioctl(cmd), cmd, rc);
- return rc;
-}
-
-/*
- * Character device file operations
- */
-static const struct file_operations cxlflash_chr_fops = {
- .owner = THIS_MODULE,
- .open = cxlflash_chr_open,
- .unlocked_ioctl = cxlflash_chr_ioctl,
- .compat_ioctl = compat_ptr_ioctl,
-};
-
-/**
- * init_chrdev() - initialize the character device for the host
- * @cfg: Internal structure associated with the host.
- *
- * Return: 0 on success, -errno on failure
- */
-static int init_chrdev(struct cxlflash_cfg *cfg)
-{
- struct device *dev = &cfg->dev->dev;
- struct device *char_dev;
- dev_t devno;
- int minor;
- int rc = 0;
-
- minor = cxlflash_get_minor();
- if (unlikely(minor < 0)) {
- dev_err(dev, "%s: Exhausted allowed adapters\n", __func__);
- rc = -ENOSPC;
- goto out;
- }
-
- devno = MKDEV(cxlflash_major, minor);
- cdev_init(&cfg->cdev, &cxlflash_chr_fops);
-
- rc = cdev_add(&cfg->cdev, devno, 1);
- if (rc) {
- dev_err(dev, "%s: cdev_add failed rc=%d\n", __func__, rc);
- goto err1;
- }
-
- char_dev = device_create(&cxlflash_class, NULL, devno,
- NULL, "cxlflash%d", minor);
- if (IS_ERR(char_dev)) {
- rc = PTR_ERR(char_dev);
- dev_err(dev, "%s: device_create failed rc=%d\n",
- __func__, rc);
- goto err2;
- }
-
- cfg->chardev = char_dev;
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-err2:
- cdev_del(&cfg->cdev);
-err1:
- cxlflash_put_minor(minor);
- goto out;
-}
-
-/**
- * cxlflash_probe() - PCI entry point to add host
- * @pdev: PCI device associated with the host.
- * @dev_id: PCI device id associated with device.
- *
- * The device will initially start out in a 'probing' state and
- * transition to the 'normal' state at the end of a successful
- * probe. Should an EEH event occur during probe, the notification
- * thread (error_detected()) will wait until the probe handler
- * is nearly complete. At that time, the device will be moved to
- * a 'probed' state and the EEH thread woken up to drive the slot
- * reset and recovery (device moves to 'normal' state). Meanwhile,
- * the probe will be allowed to exit successfully.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_probe(struct pci_dev *pdev,
- const struct pci_device_id *dev_id)
-{
- struct Scsi_Host *host;
- struct cxlflash_cfg *cfg = NULL;
- struct device *dev = &pdev->dev;
- struct dev_dependent_vals *ddv;
- int rc = 0;
- int k;
-
- dev_err_once(&pdev->dev, "DEPRECATION: cxlflash is deprecated and will be removed in a future kernel release\n");
-
- dev_dbg(&pdev->dev, "%s: Found CXLFLASH with IRQ: %d\n",
- __func__, pdev->irq);
-
- ddv = (struct dev_dependent_vals *)dev_id->driver_data;
- driver_template.max_sectors = ddv->max_sectors;
-
- host = scsi_host_alloc(&driver_template, sizeof(struct cxlflash_cfg));
- if (!host) {
- dev_err(dev, "%s: scsi_host_alloc failed\n", __func__);
- rc = -ENOMEM;
- goto out;
- }
-
- host->max_id = CXLFLASH_MAX_NUM_TARGETS_PER_BUS;
- host->max_lun = CXLFLASH_MAX_NUM_LUNS_PER_TARGET;
- host->unique_id = host->host_no;
- host->max_cmd_len = CXLFLASH_MAX_CDB_LEN;
-
- cfg = shost_priv(host);
- cfg->state = STATE_PROBING;
- cfg->host = host;
- rc = alloc_mem(cfg);
- if (rc) {
- dev_err(dev, "%s: alloc_mem failed\n", __func__);
- rc = -ENOMEM;
- scsi_host_put(cfg->host);
- goto out;
- }
-
- cfg->init_state = INIT_STATE_NONE;
- cfg->dev = pdev;
- cfg->cxl_fops = cxlflash_cxl_fops;
- cfg->ops = cxlflash_assign_ops(ddv);
- WARN_ON_ONCE(!cfg->ops);
-
- /*
- * Promoted LUNs move to the top of the LUN table. The rest stay on
- * the bottom half. The bottom half grows from the end (index = 255),
- * whereas the top half grows from the beginning (index = 0).
- *
- * Initialize the last LUN index for all possible ports.
- */
- cfg->promote_lun_index = 0;
-
- for (k = 0; k < MAX_FC_PORTS; k++)
- cfg->last_lun_index[k] = CXLFLASH_NUM_VLUNS/2 - 1;
-
- cfg->dev_id = (struct pci_device_id *)dev_id;
-
- init_waitqueue_head(&cfg->tmf_waitq);
- init_waitqueue_head(&cfg->reset_waitq);
-
- INIT_WORK(&cfg->work_q, cxlflash_worker_thread);
- cfg->lr_state = LINK_RESET_INVALID;
- cfg->lr_port = -1;
- spin_lock_init(&cfg->tmf_slock);
- mutex_init(&cfg->ctx_tbl_list_mutex);
- mutex_init(&cfg->ctx_recovery_mutex);
- init_rwsem(&cfg->ioctl_rwsem);
- INIT_LIST_HEAD(&cfg->ctx_err_recovery);
- INIT_LIST_HEAD(&cfg->lluns);
-
- pci_set_drvdata(pdev, cfg);
-
- rc = init_pci(cfg);
- if (rc) {
- dev_err(dev, "%s: init_pci failed rc=%d\n", __func__, rc);
- goto out_remove;
- }
- cfg->init_state = INIT_STATE_PCI;
-
- cfg->afu_cookie = cfg->ops->create_afu(pdev);
- if (unlikely(!cfg->afu_cookie)) {
- dev_err(dev, "%s: create_afu failed\n", __func__);
- rc = -ENOMEM;
- goto out_remove;
- }
-
- rc = init_afu(cfg);
- if (rc && !wq_has_sleeper(&cfg->reset_waitq)) {
- dev_err(dev, "%s: init_afu failed rc=%d\n", __func__, rc);
- goto out_remove;
- }
- cfg->init_state = INIT_STATE_AFU;
-
- rc = init_scsi(cfg);
- if (rc) {
- dev_err(dev, "%s: init_scsi failed rc=%d\n", __func__, rc);
- goto out_remove;
- }
- cfg->init_state = INIT_STATE_SCSI;
-
- rc = init_chrdev(cfg);
- if (rc) {
- dev_err(dev, "%s: init_chrdev failed rc=%d\n", __func__, rc);
- goto out_remove;
- }
- cfg->init_state = INIT_STATE_CDEV;
-
- if (wq_has_sleeper(&cfg->reset_waitq)) {
- cfg->state = STATE_PROBED;
- wake_up_all(&cfg->reset_waitq);
- } else
- cfg->state = STATE_NORMAL;
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-
-out_remove:
- cfg->state = STATE_PROBED;
- cxlflash_remove(pdev);
- goto out;
-}
-
-/**
- * cxlflash_pci_error_detected() - called when a PCI error is detected
- * @pdev: PCI device struct.
- * @state: PCI channel state.
- *
- * When an EEH occurs during an active reset, wait until the reset is
- * complete and then take action based upon the device state.
- *
- * Return: PCI_ERS_RESULT_NEED_RESET or PCI_ERS_RESULT_DISCONNECT
- */
-static pci_ers_result_t cxlflash_pci_error_detected(struct pci_dev *pdev,
- pci_channel_state_t state)
-{
- int rc = 0;
- struct cxlflash_cfg *cfg = pci_get_drvdata(pdev);
- struct device *dev = &cfg->dev->dev;
-
- dev_dbg(dev, "%s: pdev=%p state=%u\n", __func__, pdev, state);
-
- switch (state) {
- case pci_channel_io_frozen:
- wait_event(cfg->reset_waitq, cfg->state != STATE_RESET &&
- cfg->state != STATE_PROBING);
- if (cfg->state == STATE_FAILTERM)
- return PCI_ERS_RESULT_DISCONNECT;
-
- cfg->state = STATE_RESET;
- scsi_block_requests(cfg->host);
- drain_ioctls(cfg);
- rc = cxlflash_mark_contexts_error(cfg);
- if (unlikely(rc))
- dev_err(dev, "%s: Failed to mark user contexts rc=%d\n",
- __func__, rc);
- term_afu(cfg);
- return PCI_ERS_RESULT_NEED_RESET;
- case pci_channel_io_perm_failure:
- cfg->state = STATE_FAILTERM;
- wake_up_all(&cfg->reset_waitq);
- scsi_unblock_requests(cfg->host);
- return PCI_ERS_RESULT_DISCONNECT;
- default:
- break;
- }
- return PCI_ERS_RESULT_NEED_RESET;
-}
-
-/**
- * cxlflash_pci_slot_reset() - called when PCI slot has been reset
- * @pdev: PCI device struct.
- *
- * This routine is called by the pci error recovery code after the PCI
- * slot has been reset, just before we should resume normal operations.
- *
- * Return: PCI_ERS_RESULT_RECOVERED or PCI_ERS_RESULT_DISCONNECT
- */
-static pci_ers_result_t cxlflash_pci_slot_reset(struct pci_dev *pdev)
-{
- int rc = 0;
- struct cxlflash_cfg *cfg = pci_get_drvdata(pdev);
- struct device *dev = &cfg->dev->dev;
-
- dev_dbg(dev, "%s: pdev=%p\n", __func__, pdev);
-
- rc = init_afu(cfg);
- if (unlikely(rc)) {
- dev_err(dev, "%s: EEH recovery failed rc=%d\n", __func__, rc);
- return PCI_ERS_RESULT_DISCONNECT;
- }
-
- return PCI_ERS_RESULT_RECOVERED;
-}
-
-/**
- * cxlflash_pci_resume() - called when normal operation can resume
- * @pdev: PCI device struct
- */
-static void cxlflash_pci_resume(struct pci_dev *pdev)
-{
- struct cxlflash_cfg *cfg = pci_get_drvdata(pdev);
- struct device *dev = &cfg->dev->dev;
-
- dev_dbg(dev, "%s: pdev=%p\n", __func__, pdev);
-
- cfg->state = STATE_NORMAL;
- wake_up_all(&cfg->reset_waitq);
- scsi_unblock_requests(cfg->host);
-}
-
-/**
- * cxlflash_devnode() - provides devtmpfs for devices in the cxlflash class
- * @dev: Character device.
- * @mode: Mode that can be used to verify access.
- *
- * Return: Allocated string describing the devtmpfs structure.
- */
-static char *cxlflash_devnode(const struct device *dev, umode_t *mode)
-{
- return kasprintf(GFP_KERNEL, "cxlflash/%s", dev_name(dev));
-}
-
-/**
- * cxlflash_class_init() - create character device class
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_class_init(void)
-{
- dev_t devno;
- int rc = 0;
-
- rc = alloc_chrdev_region(&devno, 0, CXLFLASH_MAX_ADAPTERS, "cxlflash");
- if (unlikely(rc)) {
- pr_err("%s: alloc_chrdev_region failed rc=%d\n", __func__, rc);
- goto out;
- }
-
- cxlflash_major = MAJOR(devno);
-
- rc = class_register(&cxlflash_class);
- if (rc) {
- pr_err("%s: class_create failed rc=%d\n", __func__, rc);
- goto err;
- }
-
-out:
- pr_debug("%s: returning rc=%d\n", __func__, rc);
- return rc;
-err:
- unregister_chrdev_region(devno, CXLFLASH_MAX_ADAPTERS);
- goto out;
-}
-
-/**
- * cxlflash_class_exit() - destroy character device class
- */
-static void cxlflash_class_exit(void)
-{
- dev_t devno = MKDEV(cxlflash_major, 0);
-
- class_unregister(&cxlflash_class);
- unregister_chrdev_region(devno, CXLFLASH_MAX_ADAPTERS);
-}
-
-static const struct pci_error_handlers cxlflash_err_handler = {
- .error_detected = cxlflash_pci_error_detected,
- .slot_reset = cxlflash_pci_slot_reset,
- .resume = cxlflash_pci_resume,
-};
-
-/*
- * PCI device structure
- */
-static struct pci_driver cxlflash_driver = {
- .name = CXLFLASH_NAME,
- .id_table = cxlflash_pci_table,
- .probe = cxlflash_probe,
- .remove = cxlflash_remove,
- .shutdown = cxlflash_remove,
- .err_handler = &cxlflash_err_handler,
-};
-
-/**
- * init_cxlflash() - module entry point
- *
- * Return: 0 on success, -errno on failure
- */
-static int __init init_cxlflash(void)
-{
- int rc;
-
- check_sizes();
- cxlflash_list_init();
- rc = cxlflash_class_init();
- if (unlikely(rc))
- goto out;
-
- rc = pci_register_driver(&cxlflash_driver);
- if (unlikely(rc))
- goto err;
-out:
- pr_debug("%s: returning rc=%d\n", __func__, rc);
- return rc;
-err:
- cxlflash_class_exit();
- goto out;
-}
-
-/**
- * exit_cxlflash() - module exit point
- */
-static void __exit exit_cxlflash(void)
-{
- cxlflash_term_global_luns();
- cxlflash_free_errpage();
-
- pci_unregister_driver(&cxlflash_driver);
- cxlflash_class_exit();
-}
-
-module_init(init_cxlflash);
-module_exit(exit_cxlflash);
diff --git a/drivers/scsi/cxlflash/main.h b/drivers/scsi/cxlflash/main.h
deleted file mode 100644
index 0bfb98effce0..000000000000
--- a/drivers/scsi/cxlflash/main.h
+++ /dev/null
@@ -1,129 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#ifndef _CXLFLASH_MAIN_H
-#define _CXLFLASH_MAIN_H
-
-#include <linux/list.h>
-#include <linux/types.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_device.h>
-
-#include "backend.h"
-
-#define CXLFLASH_NAME "cxlflash"
-#define CXLFLASH_ADAPTER_NAME "IBM POWER CXL Flash Adapter"
-#define CXLFLASH_MAX_ADAPTERS 32
-
-#define PCI_DEVICE_ID_IBM_CORSA 0x04F0
-#define PCI_DEVICE_ID_IBM_FLASH_GT 0x0600
-#define PCI_DEVICE_ID_IBM_BRIARD 0x0624
-
-/* Since there is only one target, make it 0 */
-#define CXLFLASH_TARGET 0
-#define CXLFLASH_MAX_CDB_LEN 16
-
-/* Really only one target per bus since the Texan is directly attached */
-#define CXLFLASH_MAX_NUM_TARGETS_PER_BUS 1
-#define CXLFLASH_MAX_NUM_LUNS_PER_TARGET 65536
-
-#define CXLFLASH_PCI_ERROR_RECOVERY_TIMEOUT (120 * HZ)
-
-/* FC defines */
-#define FC_MTIP_CMDCONFIG 0x010
-#define FC_MTIP_STATUS 0x018
-#define FC_MAX_NUM_LUNS 0x080 /* Max LUNs host can provision for port */
-#define FC_CUR_NUM_LUNS 0x088 /* Cur number LUNs provisioned for port */
-#define FC_MAX_CAP_PORT 0x090 /* Max capacity all LUNs for port (4K blocks) */
-#define FC_CUR_CAP_PORT 0x098 /* Cur capacity all LUNs for port (4K blocks) */
-
-#define FC_PNAME 0x300
-#define FC_CONFIG 0x320
-#define FC_CONFIG2 0x328
-#define FC_STATUS 0x330
-#define FC_ERROR 0x380
-#define FC_ERRCAP 0x388
-#define FC_ERRMSK 0x390
-#define FC_CNT_CRCERR 0x538
-#define FC_CRC_THRESH 0x580
-
-#define FC_MTIP_CMDCONFIG_ONLINE 0x20ULL
-#define FC_MTIP_CMDCONFIG_OFFLINE 0x40ULL
-
-#define FC_MTIP_STATUS_MASK 0x30ULL
-#define FC_MTIP_STATUS_ONLINE 0x20ULL
-#define FC_MTIP_STATUS_OFFLINE 0x10ULL
-
-/* TIMEOUT and RETRY definitions */
-
-/* AFU command timeout values */
-#define MC_AFU_SYNC_TIMEOUT 5 /* 5 secs */
-#define MC_LUN_PROV_TIMEOUT 5 /* 5 secs */
-#define MC_AFU_DEBUG_TIMEOUT 5 /* 5 secs */
-
-/* AFU command room retry limit */
-#define MC_ROOM_RETRY_CNT 10
-
-/* FC CRC clear periodic timer */
-#define MC_CRC_THRESH 100 /* threshold in 5 mins */
-
-#define FC_PORT_STATUS_RETRY_CNT 100 /* 100 100ms retries = 10 seconds */
-#define FC_PORT_STATUS_RETRY_INTERVAL_US 100000 /* microseconds */
-
-/* VPD defines */
-#define CXLFLASH_VPD_LEN 256
-#define WWPN_LEN 16
-#define WWPN_BUF_LEN (WWPN_LEN + 1)
-
-enum undo_level {
- UNDO_NOOP = 0,
- FREE_IRQ,
- UNMAP_ONE,
- UNMAP_TWO,
- UNMAP_THREE
-};
-
-struct dev_dependent_vals {
- u64 max_sectors;
- u64 flags;
-#define CXLFLASH_NOTIFY_SHUTDOWN 0x0000000000000001ULL
-#define CXLFLASH_WWPN_VPD_REQUIRED 0x0000000000000002ULL
-#define CXLFLASH_OCXL_DEV 0x0000000000000004ULL
-};
-
-static inline const struct cxlflash_backend_ops *
-cxlflash_assign_ops(struct dev_dependent_vals *ddv)
-{
- const struct cxlflash_backend_ops *ops = NULL;
-
-#ifdef CONFIG_OCXL_BASE
- if (ddv->flags & CXLFLASH_OCXL_DEV)
- ops = &cxlflash_ocxl_ops;
-#endif
-
-#ifdef CONFIG_CXL_BASE
- if (!(ddv->flags & CXLFLASH_OCXL_DEV))
- ops = &cxlflash_cxl_ops;
-#endif
-
- return ops;
-}
-
-struct asyc_intr_info {
- u64 status;
- char *desc;
- u8 port;
- u8 action;
-#define CLR_FC_ERROR 0x01
-#define LINK_RESET 0x02
-#define SCAN_HOST 0x04
-};
-
-#endif /* _CXLFLASH_MAIN_H */
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
deleted file mode 100644
index 6542818e595a..000000000000
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ /dev/null
@@ -1,1399 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * CXL Flash Device Driver
- *
- * Written by: Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Uma Krishnan <ukrishn@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2018 IBM Corporation
- */
-
-#include <linux/file.h>
-#include <linux/idr.h>
-#include <linux/module.h>
-#include <linux/mount.h>
-#include <linux/pseudo_fs.h>
-#include <linux/poll.h>
-#include <linux/sched/signal.h>
-#include <linux/interrupt.h>
-#include <linux/irqdomain.h>
-#include <asm/xive.h>
-#include <misc/ocxl.h>
-
-#include <uapi/misc/cxl.h>
-
-#include "backend.h"
-#include "ocxl_hw.h"
-
-/*
- * Pseudo-filesystem to allocate inodes.
- */
-
-#define OCXLFLASH_FS_MAGIC 0x1697698f
-
-static int ocxlflash_fs_cnt;
-static struct vfsmount *ocxlflash_vfs_mount;
-
-static int ocxlflash_fs_init_fs_context(struct fs_context *fc)
-{
- return init_pseudo(fc, OCXLFLASH_FS_MAGIC) ? 0 : -ENOMEM;
-}
-
-static struct file_system_type ocxlflash_fs_type = {
- .name = "ocxlflash",
- .owner = THIS_MODULE,
- .init_fs_context = ocxlflash_fs_init_fs_context,
- .kill_sb = kill_anon_super,
-};
-
-/*
- * ocxlflash_release_mapping() - release the memory mapping
- * @ctx: Context whose mapping is to be released.
- */
-static void ocxlflash_release_mapping(struct ocxlflash_context *ctx)
-{
- if (ctx->mapping)
- simple_release_fs(&ocxlflash_vfs_mount, &ocxlflash_fs_cnt);
- ctx->mapping = NULL;
-}
-
-/*
- * ocxlflash_getfile() - allocate pseudo filesystem, inode, and the file
- * @dev: Generic device of the host.
- * @name: Name of the pseudo filesystem.
- * @fops: File operations.
- * @priv: Private data.
- * @flags: Flags for the file.
- *
- * Return: pointer to the file on success, ERR_PTR on failure
- */
-static struct file *ocxlflash_getfile(struct device *dev, const char *name,
- const struct file_operations *fops,
- void *priv, int flags)
-{
- struct file *file;
- struct inode *inode;
- int rc;
-
- if (fops->owner && !try_module_get(fops->owner)) {
- dev_err(dev, "%s: Owner does not exist\n", __func__);
- rc = -ENOENT;
- goto err1;
- }
-
- rc = simple_pin_fs(&ocxlflash_fs_type, &ocxlflash_vfs_mount,
- &ocxlflash_fs_cnt);
- if (unlikely(rc < 0)) {
- dev_err(dev, "%s: Cannot mount ocxlflash pseudofs rc=%d\n",
- __func__, rc);
- goto err2;
- }
-
- inode = alloc_anon_inode(ocxlflash_vfs_mount->mnt_sb);
- if (IS_ERR(inode)) {
- rc = PTR_ERR(inode);
- dev_err(dev, "%s: alloc_anon_inode failed rc=%d\n",
- __func__, rc);
- goto err3;
- }
-
- file = alloc_file_pseudo(inode, ocxlflash_vfs_mount, name,
- flags & (O_ACCMODE | O_NONBLOCK), fops);
- if (IS_ERR(file)) {
- rc = PTR_ERR(file);
- dev_err(dev, "%s: alloc_file failed rc=%d\n",
- __func__, rc);
- goto err4;
- }
-
- file->private_data = priv;
-out:
- return file;
-err4:
- iput(inode);
-err3:
- simple_release_fs(&ocxlflash_vfs_mount, &ocxlflash_fs_cnt);
-err2:
- module_put(fops->owner);
-err1:
- file = ERR_PTR(rc);
- goto out;
-}
-
-/**
- * ocxlflash_psa_map() - map the process specific MMIO space
- * @ctx_cookie: Adapter context for which the mapping needs to be done.
- *
- * Return: MMIO pointer of the mapped region
- */
-static void __iomem *ocxlflash_psa_map(void *ctx_cookie)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
- struct device *dev = ctx->hw_afu->dev;
-
- mutex_lock(&ctx->state_mutex);
- if (ctx->state != STARTED) {
- dev_err(dev, "%s: Context not started, state=%d\n", __func__,
- ctx->state);
- mutex_unlock(&ctx->state_mutex);
- return NULL;
- }
- mutex_unlock(&ctx->state_mutex);
-
- return ioremap(ctx->psn_phys, ctx->psn_size);
-}
-
-/**
- * ocxlflash_psa_unmap() - unmap the process specific MMIO space
- * @addr: MMIO pointer to unmap.
- */
-static void ocxlflash_psa_unmap(void __iomem *addr)
-{
- iounmap(addr);
-}
-
-/**
- * ocxlflash_process_element() - get process element of the adapter context
- * @ctx_cookie: Adapter context associated with the process element.
- *
- * Return: process element of the adapter context
- */
-static int ocxlflash_process_element(void *ctx_cookie)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
-
- return ctx->pe;
-}
-
-/**
- * afu_map_irq() - map the interrupt of the adapter context
- * @flags: Flags.
- * @ctx: Adapter context.
- * @num: Per-context AFU interrupt number.
- * @handler: Interrupt handler to register.
- * @cookie: Interrupt handler private data.
- * @name: Name of the interrupt.
- *
- * Return: 0 on success, -errno on failure
- */
-static int afu_map_irq(u64 flags, struct ocxlflash_context *ctx, int num,
- irq_handler_t handler, void *cookie, char *name)
-{
- struct ocxl_hw_afu *afu = ctx->hw_afu;
- struct device *dev = afu->dev;
- struct ocxlflash_irqs *irq;
- struct xive_irq_data *xd;
- u32 virq;
- int rc = 0;
-
- if (num < 0 || num >= ctx->num_irqs) {
- dev_err(dev, "%s: Interrupt %d not allocated\n", __func__, num);
- rc = -ENOENT;
- goto out;
- }
-
- irq = &ctx->irqs[num];
- virq = irq_create_mapping(NULL, irq->hwirq);
- if (unlikely(!virq)) {
- dev_err(dev, "%s: irq_create_mapping failed\n", __func__);
- rc = -ENOMEM;
- goto out;
- }
-
- rc = request_irq(virq, handler, 0, name, cookie);
- if (unlikely(rc)) {
- dev_err(dev, "%s: request_irq failed rc=%d\n", __func__, rc);
- goto err1;
- }
-
- xd = irq_get_handler_data(virq);
- if (unlikely(!xd)) {
- dev_err(dev, "%s: Can't get interrupt data\n", __func__);
- rc = -ENXIO;
- goto err2;
- }
-
- irq->virq = virq;
- irq->vtrig = xd->trig_mmio;
-out:
- return rc;
-err2:
- free_irq(virq, cookie);
-err1:
- irq_dispose_mapping(virq);
- goto out;
-}
-
-/**
- * ocxlflash_map_afu_irq() - map the interrupt of the adapter context
- * @ctx_cookie: Adapter context.
- * @num: Per-context AFU interrupt number.
- * @handler: Interrupt handler to register.
- * @cookie: Interrupt handler private data.
- * @name: Name of the interrupt.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_map_afu_irq(void *ctx_cookie, int num,
- irq_handler_t handler, void *cookie,
- char *name)
-{
- return afu_map_irq(0, ctx_cookie, num, handler, cookie, name);
-}
-
-/**
- * afu_unmap_irq() - unmap the interrupt
- * @flags: Flags.
- * @ctx: Adapter context.
- * @num: Per-context AFU interrupt number.
- * @cookie: Interrupt handler private data.
- */
-static void afu_unmap_irq(u64 flags, struct ocxlflash_context *ctx, int num,
- void *cookie)
-{
- struct ocxl_hw_afu *afu = ctx->hw_afu;
- struct device *dev = afu->dev;
- struct ocxlflash_irqs *irq;
-
- if (num < 0 || num >= ctx->num_irqs) {
- dev_err(dev, "%s: Interrupt %d not allocated\n", __func__, num);
- return;
- }
-
- irq = &ctx->irqs[num];
-
- if (irq_find_mapping(NULL, irq->hwirq)) {
- free_irq(irq->virq, cookie);
- irq_dispose_mapping(irq->virq);
- }
-
- memset(irq, 0, sizeof(*irq));
-}
-
-/**
- * ocxlflash_unmap_afu_irq() - unmap the interrupt
- * @ctx_cookie: Adapter context.
- * @num: Per-context AFU interrupt number.
- * @cookie: Interrupt handler private data.
- */
-static void ocxlflash_unmap_afu_irq(void *ctx_cookie, int num, void *cookie)
-{
- return afu_unmap_irq(0, ctx_cookie, num, cookie);
-}
-
-/**
- * ocxlflash_get_irq_objhndl() - get the object handle for an interrupt
- * @ctx_cookie: Context associated with the interrupt.
- * @irq: Interrupt number.
- *
- * Return: effective address of the mapped region
- */
-static u64 ocxlflash_get_irq_objhndl(void *ctx_cookie, int irq)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
-
- if (irq < 0 || irq >= ctx->num_irqs)
- return 0;
-
- return (__force u64)ctx->irqs[irq].vtrig;
-}
-
-/**
- * ocxlflash_xsl_fault() - callback when translation error is triggered
- * @data: Private data provided at callback registration, the context.
- * @addr: Address that triggered the error.
- * @dsisr: Value of dsisr register.
- */
-static void ocxlflash_xsl_fault(void *data, u64 addr, u64 dsisr)
-{
- struct ocxlflash_context *ctx = data;
-
- spin_lock(&ctx->slock);
- ctx->fault_addr = addr;
- ctx->fault_dsisr = dsisr;
- ctx->pending_fault = true;
- spin_unlock(&ctx->slock);
-
- wake_up_all(&ctx->wq);
-}
-
-/**
- * start_context() - local routine to start a context
- * @ctx: Adapter context to be started.
- *
- * Assign the context specific MMIO space, add and enable the PE.
- *
- * Return: 0 on success, -errno on failure
- */
-static int start_context(struct ocxlflash_context *ctx)
-{
- struct ocxl_hw_afu *afu = ctx->hw_afu;
- struct ocxl_afu_config *acfg = &afu->acfg;
- void *link_token = afu->link_token;
- struct pci_dev *pdev = afu->pdev;
- struct device *dev = afu->dev;
- bool master = ctx->master;
- struct mm_struct *mm;
- int rc = 0;
- u32 pid;
-
- mutex_lock(&ctx->state_mutex);
- if (ctx->state != OPENED) {
- dev_err(dev, "%s: Context state invalid, state=%d\n",
- __func__, ctx->state);
- rc = -EINVAL;
- goto out;
- }
-
- if (master) {
- ctx->psn_size = acfg->global_mmio_size;
- ctx->psn_phys = afu->gmmio_phys;
- } else {
- ctx->psn_size = acfg->pp_mmio_stride;
- ctx->psn_phys = afu->ppmmio_phys + (ctx->pe * ctx->psn_size);
- }
-
- /* pid and mm not set for master contexts */
- if (master) {
- pid = 0;
- mm = NULL;
- } else {
- pid = current->mm->context.id;
- mm = current->mm;
- }
-
- rc = ocxl_link_add_pe(link_token, ctx->pe, pid, 0, 0,
- pci_dev_id(pdev), mm, ocxlflash_xsl_fault,
- ctx);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_link_add_pe failed rc=%d\n",
- __func__, rc);
- goto out;
- }
-
- ctx->state = STARTED;
-out:
- mutex_unlock(&ctx->state_mutex);
- return rc;
-}
-
-/**
- * ocxlflash_start_context() - start a kernel context
- * @ctx_cookie: Adapter context to be started.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_start_context(void *ctx_cookie)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
-
- return start_context(ctx);
-}
-
-/**
- * ocxlflash_stop_context() - stop a context
- * @ctx_cookie: Adapter context to be stopped.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_stop_context(void *ctx_cookie)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
- struct ocxl_hw_afu *afu = ctx->hw_afu;
- struct ocxl_afu_config *acfg = &afu->acfg;
- struct pci_dev *pdev = afu->pdev;
- struct device *dev = afu->dev;
- enum ocxlflash_ctx_state state;
- int rc = 0;
-
- mutex_lock(&ctx->state_mutex);
- state = ctx->state;
- ctx->state = CLOSED;
- mutex_unlock(&ctx->state_mutex);
- if (state != STARTED)
- goto out;
-
- rc = ocxl_config_terminate_pasid(pdev, acfg->dvsec_afu_control_pos,
- ctx->pe);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_config_terminate_pasid failed rc=%d\n",
- __func__, rc);
- /* If EBUSY, PE could be referenced in future by the AFU */
- if (rc == -EBUSY)
- goto out;
- }
-
- rc = ocxl_link_remove_pe(afu->link_token, ctx->pe);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_link_remove_pe failed rc=%d\n",
- __func__, rc);
- goto out;
- }
-out:
- return rc;
-}
-
-/**
- * ocxlflash_afu_reset() - reset the AFU
- * @ctx_cookie: Adapter context.
- */
-static int ocxlflash_afu_reset(void *ctx_cookie)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
- struct device *dev = ctx->hw_afu->dev;
-
- /* Pending implementation from OCXL transport services */
- dev_err_once(dev, "%s: afu_reset() fop not supported\n", __func__);
-
- /* Silently return success until it is implemented */
- return 0;
-}
-
-/**
- * ocxlflash_set_master() - sets the context as master
- * @ctx_cookie: Adapter context to set as master.
- */
-static void ocxlflash_set_master(void *ctx_cookie)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
-
- ctx->master = true;
-}
-
-/**
- * ocxlflash_get_context() - obtains the context associated with the host
- * @pdev: PCI device associated with the host.
- * @afu_cookie: Hardware AFU associated with the host.
- *
- * Return: returns the pointer to host adapter context
- */
-static void *ocxlflash_get_context(struct pci_dev *pdev, void *afu_cookie)
-{
- struct ocxl_hw_afu *afu = afu_cookie;
-
- return afu->ocxl_ctx;
-}
-
-/**
- * ocxlflash_dev_context_init() - allocate and initialize an adapter context
- * @pdev: PCI device associated with the host.
- * @afu_cookie: Hardware AFU associated with the host.
- *
- * Return: returns the adapter context on success, ERR_PTR on failure
- */
-static void *ocxlflash_dev_context_init(struct pci_dev *pdev, void *afu_cookie)
-{
- struct ocxl_hw_afu *afu = afu_cookie;
- struct device *dev = afu->dev;
- struct ocxlflash_context *ctx;
- int rc;
-
- ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
- if (unlikely(!ctx)) {
- dev_err(dev, "%s: Context allocation failed\n", __func__);
- rc = -ENOMEM;
- goto err1;
- }
-
- idr_preload(GFP_KERNEL);
- rc = idr_alloc(&afu->idr, ctx, 0, afu->max_pasid, GFP_NOWAIT);
- idr_preload_end();
- if (unlikely(rc < 0)) {
- dev_err(dev, "%s: idr_alloc failed rc=%d\n", __func__, rc);
- goto err2;
- }
-
- spin_lock_init(&ctx->slock);
- init_waitqueue_head(&ctx->wq);
- mutex_init(&ctx->state_mutex);
-
- ctx->state = OPENED;
- ctx->pe = rc;
- ctx->master = false;
- ctx->mapping = NULL;
- ctx->hw_afu = afu;
- ctx->irq_bitmap = 0;
- ctx->pending_irq = false;
- ctx->pending_fault = false;
-out:
- return ctx;
-err2:
- kfree(ctx);
-err1:
- ctx = ERR_PTR(rc);
- goto out;
-}
-
-/**
- * ocxlflash_release_context() - releases an adapter context
- * @ctx_cookie: Adapter context to be released.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_release_context(void *ctx_cookie)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
- struct device *dev;
- int rc = 0;
-
- if (!ctx)
- goto out;
-
- dev = ctx->hw_afu->dev;
- mutex_lock(&ctx->state_mutex);
- if (ctx->state >= STARTED) {
- dev_err(dev, "%s: Context in use, state=%d\n", __func__,
- ctx->state);
- mutex_unlock(&ctx->state_mutex);
- rc = -EBUSY;
- goto out;
- }
- mutex_unlock(&ctx->state_mutex);
-
- idr_remove(&ctx->hw_afu->idr, ctx->pe);
- ocxlflash_release_mapping(ctx);
- kfree(ctx);
-out:
- return rc;
-}
-
-/**
- * ocxlflash_perst_reloads_same_image() - sets the image reload policy
- * @afu_cookie: Hardware AFU associated with the host.
- * @image: Whether to load the same image on PERST.
- */
-static void ocxlflash_perst_reloads_same_image(void *afu_cookie, bool image)
-{
- struct ocxl_hw_afu *afu = afu_cookie;
-
- afu->perst_same_image = image;
-}
-
-/**
- * ocxlflash_read_adapter_vpd() - reads the adapter VPD
- * @pdev: PCI device associated with the host.
- * @buf: Buffer to get the VPD data.
- * @count: Size of buffer (maximum bytes that can be read).
- *
- * Return: size of VPD on success, -errno on failure
- */
-static ssize_t ocxlflash_read_adapter_vpd(struct pci_dev *pdev, void *buf,
- size_t count)
-{
- return pci_read_vpd(pdev, 0, count, buf);
-}
-
-/**
- * free_afu_irqs() - internal service to free interrupts
- * @ctx: Adapter context.
- */
-static void free_afu_irqs(struct ocxlflash_context *ctx)
-{
- struct ocxl_hw_afu *afu = ctx->hw_afu;
- struct device *dev = afu->dev;
- int i;
-
- if (!ctx->irqs) {
- dev_err(dev, "%s: Interrupts not allocated\n", __func__);
- return;
- }
-
- for (i = ctx->num_irqs; i >= 0; i--)
- ocxl_link_free_irq(afu->link_token, ctx->irqs[i].hwirq);
-
- kfree(ctx->irqs);
- ctx->irqs = NULL;
-}
-
-/**
- * alloc_afu_irqs() - internal service to allocate interrupts
- * @ctx: Context associated with the request.
- * @num: Number of interrupts requested.
- *
- * Return: 0 on success, -errno on failure
- */
-static int alloc_afu_irqs(struct ocxlflash_context *ctx, int num)
-{
- struct ocxl_hw_afu *afu = ctx->hw_afu;
- struct device *dev = afu->dev;
- struct ocxlflash_irqs *irqs;
- int rc = 0;
- int hwirq;
- int i;
-
- if (ctx->irqs) {
- dev_err(dev, "%s: Interrupts already allocated\n", __func__);
- rc = -EEXIST;
- goto out;
- }
-
- if (num > OCXL_MAX_IRQS) {
- dev_err(dev, "%s: Too many interrupts num=%d\n", __func__, num);
- rc = -EINVAL;
- goto out;
- }
-
- irqs = kcalloc(num, sizeof(*irqs), GFP_KERNEL);
- if (unlikely(!irqs)) {
- dev_err(dev, "%s: Context irqs allocation failed\n", __func__);
- rc = -ENOMEM;
- goto out;
- }
-
- for (i = 0; i < num; i++) {
- rc = ocxl_link_irq_alloc(afu->link_token, &hwirq);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_link_irq_alloc failed rc=%d\n",
- __func__, rc);
- goto err;
- }
-
- irqs[i].hwirq = hwirq;
- }
-
- ctx->irqs = irqs;
- ctx->num_irqs = num;
-out:
- return rc;
-err:
- for (i = i-1; i >= 0; i--)
- ocxl_link_free_irq(afu->link_token, irqs[i].hwirq);
- kfree(irqs);
- goto out;
-}
-
-/**
- * ocxlflash_allocate_afu_irqs() - allocates the requested number of interrupts
- * @ctx_cookie: Context associated with the request.
- * @num: Number of interrupts requested.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_allocate_afu_irqs(void *ctx_cookie, int num)
-{
- return alloc_afu_irqs(ctx_cookie, num);
-}
-
-/**
- * ocxlflash_free_afu_irqs() - frees the interrupts of an adapter context
- * @ctx_cookie: Adapter context.
- */
-static void ocxlflash_free_afu_irqs(void *ctx_cookie)
-{
- free_afu_irqs(ctx_cookie);
-}
-
-/**
- * ocxlflash_unconfig_afu() - unconfigure the AFU
- * @afu: AFU associated with the host.
- */
-static void ocxlflash_unconfig_afu(struct ocxl_hw_afu *afu)
-{
- if (afu->gmmio_virt) {
- iounmap(afu->gmmio_virt);
- afu->gmmio_virt = NULL;
- }
-}
-
-/**
- * ocxlflash_destroy_afu() - destroy the AFU structure
- * @afu_cookie: AFU to be freed.
- */
-static void ocxlflash_destroy_afu(void *afu_cookie)
-{
- struct ocxl_hw_afu *afu = afu_cookie;
- int pos;
-
- if (!afu)
- return;
-
- ocxlflash_release_context(afu->ocxl_ctx);
- idr_destroy(&afu->idr);
-
- /* Disable the AFU */
- pos = afu->acfg.dvsec_afu_control_pos;
- ocxl_config_set_afu_state(afu->pdev, pos, 0);
-
- ocxlflash_unconfig_afu(afu);
- kfree(afu);
-}
-
-/**
- * ocxlflash_config_fn() - configure the host function
- * @pdev: PCI device associated with the host.
- * @afu: AFU associated with the host.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu)
-{
- struct ocxl_fn_config *fcfg = &afu->fcfg;
- struct device *dev = &pdev->dev;
- u16 base, enabled, supported;
- int rc = 0;
-
- /* Read DVSEC config of the function */
- rc = ocxl_config_read_function(pdev, fcfg);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_config_read_function failed rc=%d\n",
- __func__, rc);
- goto out;
- }
-
- /* Check if function has AFUs defined, only 1 per function supported */
- if (fcfg->max_afu_index >= 0) {
- afu->is_present = true;
- if (fcfg->max_afu_index != 0)
- dev_warn(dev, "%s: Unexpected AFU index value %d\n",
- __func__, fcfg->max_afu_index);
- }
-
- rc = ocxl_config_get_actag_info(pdev, &base, &enabled, &supported);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_config_get_actag_info failed rc=%d\n",
- __func__, rc);
- goto out;
- }
-
- afu->fn_actag_base = base;
- afu->fn_actag_enabled = enabled;
-
- ocxl_config_set_actag(pdev, fcfg->dvsec_function_pos, base, enabled);
- dev_dbg(dev, "%s: Function acTag range base=%u enabled=%u\n",
- __func__, base, enabled);
-
- rc = ocxl_link_setup(pdev, 0, &afu->link_token);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_link_setup failed rc=%d\n",
- __func__, rc);
- goto out;
- }
-
- rc = ocxl_config_set_TL(pdev, fcfg->dvsec_tl_pos);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_config_set_TL failed rc=%d\n",
- __func__, rc);
- goto err;
- }
-out:
- return rc;
-err:
- ocxl_link_release(pdev, afu->link_token);
- goto out;
-}
-
-/**
- * ocxlflash_unconfig_fn() - unconfigure the host function
- * @pdev: PCI device associated with the host.
- * @afu: AFU associated with the host.
- */
-static void ocxlflash_unconfig_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu)
-{
- ocxl_link_release(pdev, afu->link_token);
-}
-
-/**
- * ocxlflash_map_mmio() - map the AFU MMIO space
- * @afu: AFU associated with the host.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_map_mmio(struct ocxl_hw_afu *afu)
-{
- struct ocxl_afu_config *acfg = &afu->acfg;
- struct pci_dev *pdev = afu->pdev;
- struct device *dev = afu->dev;
- phys_addr_t gmmio, ppmmio;
- int rc = 0;
-
- rc = pci_request_region(pdev, acfg->global_mmio_bar, "ocxlflash");
- if (unlikely(rc)) {
- dev_err(dev, "%s: pci_request_region for global failed rc=%d\n",
- __func__, rc);
- goto out;
- }
- gmmio = pci_resource_start(pdev, acfg->global_mmio_bar);
- gmmio += acfg->global_mmio_offset;
-
- rc = pci_request_region(pdev, acfg->pp_mmio_bar, "ocxlflash");
- if (unlikely(rc)) {
- dev_err(dev, "%s: pci_request_region for pp bar failed rc=%d\n",
- __func__, rc);
- goto err1;
- }
- ppmmio = pci_resource_start(pdev, acfg->pp_mmio_bar);
- ppmmio += acfg->pp_mmio_offset;
-
- afu->gmmio_virt = ioremap(gmmio, acfg->global_mmio_size);
- if (unlikely(!afu->gmmio_virt)) {
- dev_err(dev, "%s: MMIO mapping failed\n", __func__);
- rc = -ENOMEM;
- goto err2;
- }
-
- afu->gmmio_phys = gmmio;
- afu->ppmmio_phys = ppmmio;
-out:
- return rc;
-err2:
- pci_release_region(pdev, acfg->pp_mmio_bar);
-err1:
- pci_release_region(pdev, acfg->global_mmio_bar);
- goto out;
-}
-
-/**
- * ocxlflash_config_afu() - configure the host AFU
- * @pdev: PCI device associated with the host.
- * @afu: AFU associated with the host.
- *
- * Must be called _after_ host function configuration.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_config_afu(struct pci_dev *pdev, struct ocxl_hw_afu *afu)
-{
- struct ocxl_afu_config *acfg = &afu->acfg;
- struct ocxl_fn_config *fcfg = &afu->fcfg;
- struct device *dev = &pdev->dev;
- int count;
- int base;
- int pos;
- int rc = 0;
-
- /* This HW AFU function does not have any AFUs defined */
- if (!afu->is_present)
- goto out;
-
- /* Read AFU config at index 0 */
- rc = ocxl_config_read_afu(pdev, fcfg, acfg, 0);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxl_config_read_afu failed rc=%d\n",
- __func__, rc);
- goto out;
- }
-
- /* Only one AFU per function is supported, so actag_base is same */
- base = afu->fn_actag_base;
- count = min_t(int, acfg->actag_supported, afu->fn_actag_enabled);
- pos = acfg->dvsec_afu_control_pos;
-
- ocxl_config_set_afu_actag(pdev, pos, base, count);
- dev_dbg(dev, "%s: acTag base=%d enabled=%d\n", __func__, base, count);
- afu->afu_actag_base = base;
- afu->afu_actag_enabled = count;
- afu->max_pasid = 1 << acfg->pasid_supported_log;
-
- ocxl_config_set_afu_pasid(pdev, pos, 0, acfg->pasid_supported_log);
-
- rc = ocxlflash_map_mmio(afu);
- if (unlikely(rc)) {
- dev_err(dev, "%s: ocxlflash_map_mmio failed rc=%d\n",
- __func__, rc);
- goto out;
- }
-
- /* Enable the AFU */
- ocxl_config_set_afu_state(pdev, acfg->dvsec_afu_control_pos, 1);
-out:
- return rc;
-}
-
-/**
- * ocxlflash_create_afu() - create the AFU for OCXL
- * @pdev: PCI device associated with the host.
- *
- * Return: AFU on success, NULL on failure
- */
-static void *ocxlflash_create_afu(struct pci_dev *pdev)
-{
- struct device *dev = &pdev->dev;
- struct ocxlflash_context *ctx;
- struct ocxl_hw_afu *afu;
- int rc;
-
- afu = kzalloc(sizeof(*afu), GFP_KERNEL);
- if (unlikely(!afu)) {
- dev_err(dev, "%s: HW AFU allocation failed\n", __func__);
- goto out;
- }
-
- afu->pdev = pdev;
- afu->dev = dev;
- idr_init(&afu->idr);
-
- rc = ocxlflash_config_fn(pdev, afu);
- if (unlikely(rc)) {
- dev_err(dev, "%s: Function configuration failed rc=%d\n",
- __func__, rc);
- goto err1;
- }
-
- rc = ocxlflash_config_afu(pdev, afu);
- if (unlikely(rc)) {
- dev_err(dev, "%s: AFU configuration failed rc=%d\n",
- __func__, rc);
- goto err2;
- }
-
- ctx = ocxlflash_dev_context_init(pdev, afu);
- if (IS_ERR(ctx)) {
- rc = PTR_ERR(ctx);
- dev_err(dev, "%s: ocxlflash_dev_context_init failed rc=%d\n",
- __func__, rc);
- goto err3;
- }
-
- afu->ocxl_ctx = ctx;
-out:
- return afu;
-err3:
- ocxlflash_unconfig_afu(afu);
-err2:
- ocxlflash_unconfig_fn(pdev, afu);
-err1:
- idr_destroy(&afu->idr);
- kfree(afu);
- afu = NULL;
- goto out;
-}
-
-/**
- * ctx_event_pending() - check for any event pending on the context
- * @ctx: Context to be checked.
- *
- * Return: true if there is an event pending, false if none pending
- */
-static inline bool ctx_event_pending(struct ocxlflash_context *ctx)
-{
- if (ctx->pending_irq || ctx->pending_fault)
- return true;
-
- return false;
-}
-
-/**
- * afu_poll() - poll the AFU for events on the context
- * @file: File associated with the adapter context.
- * @poll: Poll structure from the user.
- *
- * Return: poll mask
- */
-static unsigned int afu_poll(struct file *file, struct poll_table_struct *poll)
-{
- struct ocxlflash_context *ctx = file->private_data;
- struct device *dev = ctx->hw_afu->dev;
- ulong lock_flags;
- int mask = 0;
-
- poll_wait(file, &ctx->wq, poll);
-
- spin_lock_irqsave(&ctx->slock, lock_flags);
- if (ctx_event_pending(ctx))
- mask |= POLLIN | POLLRDNORM;
- else if (ctx->state == CLOSED)
- mask |= POLLERR;
- spin_unlock_irqrestore(&ctx->slock, lock_flags);
-
- dev_dbg(dev, "%s: Poll wait completed for pe %i mask %i\n",
- __func__, ctx->pe, mask);
-
- return mask;
-}
-
-/**
- * afu_read() - perform a read on the context for any event
- * @file: File associated with the adapter context.
- * @buf: Buffer to receive the data.
- * @count: Size of buffer (maximum bytes that can be read).
- * @off: Offset.
- *
- * Return: size of the data read on success, -errno on failure
- */
-static ssize_t afu_read(struct file *file, char __user *buf, size_t count,
- loff_t *off)
-{
- struct ocxlflash_context *ctx = file->private_data;
- struct device *dev = ctx->hw_afu->dev;
- struct cxl_event event;
- ulong lock_flags;
- ssize_t esize;
- ssize_t rc;
- int bit;
- DEFINE_WAIT(event_wait);
-
- if (*off != 0) {
- dev_err(dev, "%s: Non-zero offset not supported, off=%lld\n",
- __func__, *off);
- rc = -EINVAL;
- goto out;
- }
-
- spin_lock_irqsave(&ctx->slock, lock_flags);
-
- for (;;) {
- prepare_to_wait(&ctx->wq, &event_wait, TASK_INTERRUPTIBLE);
-
- if (ctx_event_pending(ctx) || (ctx->state == CLOSED))
- break;
-
- if (file->f_flags & O_NONBLOCK) {
- dev_err(dev, "%s: File cannot be blocked on I/O\n",
- __func__);
- rc = -EAGAIN;
- goto err;
- }
-
- if (signal_pending(current)) {
- dev_err(dev, "%s: Signal pending on the process\n",
- __func__);
- rc = -ERESTARTSYS;
- goto err;
- }
-
- spin_unlock_irqrestore(&ctx->slock, lock_flags);
- schedule();
- spin_lock_irqsave(&ctx->slock, lock_flags);
- }
-
- finish_wait(&ctx->wq, &event_wait);
-
- memset(&event, 0, sizeof(event));
- event.header.process_element = ctx->pe;
- event.header.size = sizeof(struct cxl_event_header);
- if (ctx->pending_irq) {
- esize = sizeof(struct cxl_event_afu_interrupt);
- event.header.size += esize;
- event.header.type = CXL_EVENT_AFU_INTERRUPT;
-
- bit = find_first_bit(&ctx->irq_bitmap, ctx->num_irqs);
- clear_bit(bit, &ctx->irq_bitmap);
- event.irq.irq = bit + 1;
- if (bitmap_empty(&ctx->irq_bitmap, ctx->num_irqs))
- ctx->pending_irq = false;
- } else if (ctx->pending_fault) {
- event.header.size += sizeof(struct cxl_event_data_storage);
- event.header.type = CXL_EVENT_DATA_STORAGE;
- event.fault.addr = ctx->fault_addr;
- event.fault.dsisr = ctx->fault_dsisr;
- ctx->pending_fault = false;
- }
-
- spin_unlock_irqrestore(&ctx->slock, lock_flags);
-
- if (copy_to_user(buf, &event, event.header.size)) {
- dev_err(dev, "%s: copy_to_user failed\n", __func__);
- rc = -EFAULT;
- goto out;
- }
-
- rc = event.header.size;
-out:
- return rc;
-err:
- finish_wait(&ctx->wq, &event_wait);
- spin_unlock_irqrestore(&ctx->slock, lock_flags);
- goto out;
-}
-
-/**
- * afu_release() - release and free the context
- * @inode: File inode pointer.
- * @file: File associated with the context.
- *
- * Return: 0 on success, -errno on failure
- */
-static int afu_release(struct inode *inode, struct file *file)
-{
- struct ocxlflash_context *ctx = file->private_data;
- int i;
-
- /* Unmap and free the interrupts associated with the context */
- for (i = ctx->num_irqs; i >= 0; i--)
- afu_unmap_irq(0, ctx, i, ctx);
- free_afu_irqs(ctx);
-
- return ocxlflash_release_context(ctx);
-}
-
-/**
- * ocxlflash_mmap_fault() - mmap fault handler
- * @vmf: VM fault associated with current fault.
- *
- * Return: 0 on success, -errno on failure
- */
-static vm_fault_t ocxlflash_mmap_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct ocxlflash_context *ctx = vma->vm_file->private_data;
- struct device *dev = ctx->hw_afu->dev;
- u64 mmio_area, offset;
-
- offset = vmf->pgoff << PAGE_SHIFT;
- if (offset >= ctx->psn_size)
- return VM_FAULT_SIGBUS;
-
- mutex_lock(&ctx->state_mutex);
- if (ctx->state != STARTED) {
- dev_err(dev, "%s: Context not started, state=%d\n",
- __func__, ctx->state);
- mutex_unlock(&ctx->state_mutex);
- return VM_FAULT_SIGBUS;
- }
- mutex_unlock(&ctx->state_mutex);
-
- mmio_area = ctx->psn_phys;
- mmio_area += offset;
-
- return vmf_insert_pfn(vma, vmf->address, mmio_area >> PAGE_SHIFT);
-}
-
-static const struct vm_operations_struct ocxlflash_vmops = {
- .fault = ocxlflash_mmap_fault,
-};
-
-/**
- * afu_mmap() - map the fault handler operations
- * @file: File associated with the context.
- * @vma: VM area associated with mapping.
- *
- * Return: 0 on success, -errno on failure
- */
-static int afu_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct ocxlflash_context *ctx = file->private_data;
-
- if ((vma_pages(vma) + vma->vm_pgoff) >
- (ctx->psn_size >> PAGE_SHIFT))
- return -EINVAL;
-
- vm_flags_set(vma, VM_IO | VM_PFNMAP);
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_ops = &ocxlflash_vmops;
- return 0;
-}
-
-static const struct file_operations ocxl_afu_fops = {
- .owner = THIS_MODULE,
- .poll = afu_poll,
- .read = afu_read,
- .release = afu_release,
- .mmap = afu_mmap,
-};
-
-#define PATCH_FOPS(NAME) \
- do { if (!fops->NAME) fops->NAME = ocxl_afu_fops.NAME; } while (0)
-
-/**
- * ocxlflash_get_fd() - get file descriptor for an adapter context
- * @ctx_cookie: Adapter context.
- * @fops: File operations to be associated.
- * @fd: File descriptor to be returned back.
- *
- * Return: pointer to the file on success, ERR_PTR on failure
- */
-static struct file *ocxlflash_get_fd(void *ctx_cookie,
- struct file_operations *fops, int *fd)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
- struct device *dev = ctx->hw_afu->dev;
- struct file *file;
- int flags, fdtmp;
- int rc = 0;
- char *name = NULL;
-
- /* Only allow one fd per context */
- if (ctx->mapping) {
- dev_err(dev, "%s: Context is already mapped to an fd\n",
- __func__);
- rc = -EEXIST;
- goto err1;
- }
-
- flags = O_RDWR | O_CLOEXEC;
-
- /* This code is similar to anon_inode_getfd() */
- rc = get_unused_fd_flags(flags);
- if (unlikely(rc < 0)) {
- dev_err(dev, "%s: get_unused_fd_flags failed rc=%d\n",
- __func__, rc);
- goto err1;
- }
- fdtmp = rc;
-
- /* Patch the file ops that are not defined */
- if (fops) {
- PATCH_FOPS(poll);
- PATCH_FOPS(read);
- PATCH_FOPS(release);
- PATCH_FOPS(mmap);
- } else /* Use default ops */
- fops = (struct file_operations *)&ocxl_afu_fops;
-
- name = kasprintf(GFP_KERNEL, "ocxlflash:%d", ctx->pe);
- file = ocxlflash_getfile(dev, name, fops, ctx, flags);
- kfree(name);
- if (IS_ERR(file)) {
- rc = PTR_ERR(file);
- dev_err(dev, "%s: ocxlflash_getfile failed rc=%d\n",
- __func__, rc);
- goto err2;
- }
-
- ctx->mapping = file->f_mapping;
- *fd = fdtmp;
-out:
- return file;
-err2:
- put_unused_fd(fdtmp);
-err1:
- file = ERR_PTR(rc);
- goto out;
-}
-
-/**
- * ocxlflash_fops_get_context() - get the context associated with the file
- * @file: File associated with the adapter context.
- *
- * Return: pointer to the context
- */
-static void *ocxlflash_fops_get_context(struct file *file)
-{
- return file->private_data;
-}
-
-/**
- * ocxlflash_afu_irq() - interrupt handler for user contexts
- * @irq: Interrupt number.
- * @data: Private data provided at interrupt registration, the context.
- *
- * Return: Always return IRQ_HANDLED.
- */
-static irqreturn_t ocxlflash_afu_irq(int irq, void *data)
-{
- struct ocxlflash_context *ctx = data;
- struct device *dev = ctx->hw_afu->dev;
- int i;
-
- dev_dbg(dev, "%s: Interrupt raised for pe %i virq %i\n",
- __func__, ctx->pe, irq);
-
- for (i = 0; i < ctx->num_irqs; i++) {
- if (ctx->irqs[i].virq == irq)
- break;
- }
- if (unlikely(i >= ctx->num_irqs)) {
- dev_err(dev, "%s: Received AFU IRQ out of range\n", __func__);
- goto out;
- }
-
- spin_lock(&ctx->slock);
- set_bit(i - 1, &ctx->irq_bitmap);
- ctx->pending_irq = true;
- spin_unlock(&ctx->slock);
-
- wake_up_all(&ctx->wq);
-out:
- return IRQ_HANDLED;
-}
-
-/**
- * ocxlflash_start_work() - start a user context
- * @ctx_cookie: Context to be started.
- * @num_irqs: Number of interrupts requested.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_start_work(void *ctx_cookie, u64 num_irqs)
-{
- struct ocxlflash_context *ctx = ctx_cookie;
- struct ocxl_hw_afu *afu = ctx->hw_afu;
- struct device *dev = afu->dev;
- char *name;
- int rc = 0;
- int i;
-
- rc = alloc_afu_irqs(ctx, num_irqs);
- if (unlikely(rc < 0)) {
- dev_err(dev, "%s: alloc_afu_irqs failed rc=%d\n", __func__, rc);
- goto out;
- }
-
- for (i = 0; i < num_irqs; i++) {
- name = kasprintf(GFP_KERNEL, "ocxlflash-%s-pe%i-%i",
- dev_name(dev), ctx->pe, i);
- rc = afu_map_irq(0, ctx, i, ocxlflash_afu_irq, ctx, name);
- kfree(name);
- if (unlikely(rc < 0)) {
- dev_err(dev, "%s: afu_map_irq failed rc=%d\n",
- __func__, rc);
- goto err;
- }
- }
-
- rc = start_context(ctx);
- if (unlikely(rc)) {
- dev_err(dev, "%s: start_context failed rc=%d\n", __func__, rc);
- goto err;
- }
-out:
- return rc;
-err:
- for (i = i-1; i >= 0; i--)
- afu_unmap_irq(0, ctx, i, ctx);
- free_afu_irqs(ctx);
- goto out;
-};
-
-/**
- * ocxlflash_fd_mmap() - mmap handler for adapter file descriptor
- * @file: File installed with adapter file descriptor.
- * @vma: VM area associated with mapping.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_fd_mmap(struct file *file, struct vm_area_struct *vma)
-{
- return afu_mmap(file, vma);
-}
-
-/**
- * ocxlflash_fd_release() - release the context associated with the file
- * @inode: File inode pointer.
- * @file: File associated with the adapter context.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ocxlflash_fd_release(struct inode *inode, struct file *file)
-{
- return afu_release(inode, file);
-}
-
-/* Backend ops to ocxlflash services */
-const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
- .module = THIS_MODULE,
- .psa_map = ocxlflash_psa_map,
- .psa_unmap = ocxlflash_psa_unmap,
- .process_element = ocxlflash_process_element,
- .map_afu_irq = ocxlflash_map_afu_irq,
- .unmap_afu_irq = ocxlflash_unmap_afu_irq,
- .get_irq_objhndl = ocxlflash_get_irq_objhndl,
- .start_context = ocxlflash_start_context,
- .stop_context = ocxlflash_stop_context,
- .afu_reset = ocxlflash_afu_reset,
- .set_master = ocxlflash_set_master,
- .get_context = ocxlflash_get_context,
- .dev_context_init = ocxlflash_dev_context_init,
- .release_context = ocxlflash_release_context,
- .perst_reloads_same_image = ocxlflash_perst_reloads_same_image,
- .read_adapter_vpd = ocxlflash_read_adapter_vpd,
- .allocate_afu_irqs = ocxlflash_allocate_afu_irqs,
- .free_afu_irqs = ocxlflash_free_afu_irqs,
- .create_afu = ocxlflash_create_afu,
- .destroy_afu = ocxlflash_destroy_afu,
- .get_fd = ocxlflash_get_fd,
- .fops_get_context = ocxlflash_fops_get_context,
- .start_work = ocxlflash_start_work,
- .fd_mmap = ocxlflash_fd_mmap,
- .fd_release = ocxlflash_fd_release,
-};
diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h
deleted file mode 100644
index f2fe88816bea..000000000000
--- a/drivers/scsi/cxlflash/ocxl_hw.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Uma Krishnan <ukrishn@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2018 IBM Corporation
- */
-
-#define OCXL_MAX_IRQS 4 /* Max interrupts per process */
-
-struct ocxlflash_irqs {
- int hwirq;
- u32 virq;
- void __iomem *vtrig;
-};
-
-/* OCXL hardware AFU associated with the host */
-struct ocxl_hw_afu {
- struct ocxlflash_context *ocxl_ctx; /* Host context */
- struct pci_dev *pdev; /* PCI device */
- struct device *dev; /* Generic device */
- bool perst_same_image; /* Same image loaded on perst */
-
- struct ocxl_fn_config fcfg; /* DVSEC config of the function */
- struct ocxl_afu_config acfg; /* AFU configuration data */
-
- int fn_actag_base; /* Function acTag base */
- int fn_actag_enabled; /* Function acTag number enabled */
- int afu_actag_base; /* AFU acTag base */
- int afu_actag_enabled; /* AFU acTag number enabled */
-
- phys_addr_t ppmmio_phys; /* Per process MMIO space */
- phys_addr_t gmmio_phys; /* Global AFU MMIO space */
- void __iomem *gmmio_virt; /* Global MMIO map */
-
- void *link_token; /* Link token for the SPA */
- struct idr idr; /* IDR to manage contexts */
- int max_pasid; /* Maximum number of contexts */
- bool is_present; /* Function has AFUs defined */
-};
-
-enum ocxlflash_ctx_state {
- CLOSED,
- OPENED,
- STARTED
-};
-
-struct ocxlflash_context {
- struct ocxl_hw_afu *hw_afu; /* HW AFU back pointer */
- struct address_space *mapping; /* Mapping for pseudo filesystem */
- bool master; /* Whether this is a master context */
- int pe; /* Process element */
-
- phys_addr_t psn_phys; /* Process mapping */
- u64 psn_size; /* Process mapping size */
-
- spinlock_t slock; /* Protects irq/fault/event updates */
- wait_queue_head_t wq; /* Wait queue for poll and interrupts */
- struct mutex state_mutex; /* Mutex to update context state */
- enum ocxlflash_ctx_state state; /* Context state */
-
- struct ocxlflash_irqs *irqs; /* Pointer to array of structures */
- int num_irqs; /* Number of interrupts */
- bool pending_irq; /* Pending interrupt on the context */
- ulong irq_bitmap; /* Bits indicating pending irq num */
-
- u64 fault_addr; /* Address that triggered the fault */
- u64 fault_dsisr; /* Value of dsisr register at fault */
- bool pending_fault; /* Pending translation fault */
-};
diff --git a/drivers/scsi/cxlflash/sislite.h b/drivers/scsi/cxlflash/sislite.h
deleted file mode 100644
index ab315c59505b..000000000000
--- a/drivers/scsi/cxlflash/sislite.h
+++ /dev/null
@@ -1,560 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#ifndef _SISLITE_H
-#define _SISLITE_H
-
-#include <linux/types.h>
-
-typedef u16 ctx_hndl_t;
-typedef u32 res_hndl_t;
-
-#define SIZE_4K 4096
-#define SIZE_64K 65536
-
-/*
- * IOARCB: 64 bytes, min 16 byte alignment required, host native endianness
- * except for SCSI CDB which remains big endian per SCSI standards.
- */
-struct sisl_ioarcb {
- u16 ctx_id; /* ctx_hndl_t */
- u16 req_flags;
-#define SISL_REQ_FLAGS_RES_HNDL 0x8000U /* bit 0 (MSB) */
-#define SISL_REQ_FLAGS_PORT_LUN_ID 0x0000U
-
-#define SISL_REQ_FLAGS_SUP_UNDERRUN 0x4000U /* bit 1 */
-
-#define SISL_REQ_FLAGS_TIMEOUT_SECS 0x0000U /* bits 8,9 */
-#define SISL_REQ_FLAGS_TIMEOUT_MSECS 0x0040U
-#define SISL_REQ_FLAGS_TIMEOUT_USECS 0x0080U
-#define SISL_REQ_FLAGS_TIMEOUT_CYCLES 0x00C0U
-
-#define SISL_REQ_FLAGS_TMF_CMD 0x0004u /* bit 13 */
-
-#define SISL_REQ_FLAGS_AFU_CMD 0x0002U /* bit 14 */
-
-#define SISL_REQ_FLAGS_HOST_WRITE 0x0001U /* bit 15 (LSB) */
-#define SISL_REQ_FLAGS_HOST_READ 0x0000U
-
- union {
- u32 res_hndl; /* res_hndl_t */
- u32 port_sel; /* this is a selection mask:
- * 0x1 -> port#0 can be selected,
- * 0x2 -> port#1 can be selected.
- * Can be bitwise ORed.
- */
- };
- u64 lun_id;
- u32 data_len; /* 4K for read/write */
- u32 ioadl_len;
- union {
- u64 data_ea; /* min 16 byte aligned */
- u64 ioadl_ea;
- };
- u8 msi; /* LISN to send on RRQ write */
-#define SISL_MSI_CXL_PFAULT 0 /* reserved for CXL page faults */
-#define SISL_MSI_SYNC_ERROR 1 /* recommended for AFU sync error */
-#define SISL_MSI_RRQ_UPDATED 2 /* recommended for IO completion */
-#define SISL_MSI_ASYNC_ERROR 3 /* master only - for AFU async error */
-
- u8 rrq; /* 0 for a single RRQ */
- u16 timeout; /* in units specified by req_flags */
- u32 rsvd1;
- u8 cdb[16]; /* must be in big endian */
-#define SISL_AFU_CMD_SYNC 0xC0 /* AFU sync command */
-#define SISL_AFU_CMD_LUN_PROVISION 0xD0 /* AFU LUN provision command */
-#define SISL_AFU_CMD_DEBUG 0xE0 /* AFU debug command */
-
-#define SISL_AFU_LUN_PROVISION_CREATE 0x00 /* LUN provision create type */
-#define SISL_AFU_LUN_PROVISION_DELETE 0x01 /* LUN provision delete type */
-
- union {
- u64 reserved; /* Reserved for IOARRIN mode */
- struct sisl_ioasa *ioasa; /* IOASA EA for SQ Mode */
- };
-} __packed;
-
-struct sisl_rc {
- u8 flags;
-#define SISL_RC_FLAGS_SENSE_VALID 0x80U
-#define SISL_RC_FLAGS_FCP_RSP_CODE_VALID 0x40U
-#define SISL_RC_FLAGS_OVERRUN 0x20U
-#define SISL_RC_FLAGS_UNDERRUN 0x10U
-
- u8 afu_rc;
-#define SISL_AFU_RC_RHT_INVALID 0x01U /* user error */
-#define SISL_AFU_RC_RHT_UNALIGNED 0x02U /* should never happen */
-#define SISL_AFU_RC_RHT_OUT_OF_BOUNDS 0x03u /* user error */
-#define SISL_AFU_RC_RHT_DMA_ERR 0x04u /* see afu_extra
- * may retry if afu_retry is off
- * possible on master exit
- */
-#define SISL_AFU_RC_RHT_RW_PERM 0x05u /* no RW perms, user error */
-#define SISL_AFU_RC_LXT_UNALIGNED 0x12U /* should never happen */
-#define SISL_AFU_RC_LXT_OUT_OF_BOUNDS 0x13u /* user error */
-#define SISL_AFU_RC_LXT_DMA_ERR 0x14u /* see afu_extra
- * may retry if afu_retry is off
- * possible on master exit
- */
-#define SISL_AFU_RC_LXT_RW_PERM 0x15u /* no RW perms, user error */
-
-#define SISL_AFU_RC_NOT_XLATE_HOST 0x1au /* possible if master exited */
-
- /* NO_CHANNELS means the FC ports selected by dest_port in
- * IOARCB or in the LXT entry are down when the AFU tried to select
- * a FC port. If the port went down on an active IO, it will set
- * fc_rc to =0x54(NOLOGI) or 0x57(LINKDOWN) instead.
- */
-#define SISL_AFU_RC_NO_CHANNELS 0x20U /* see afu_extra, may retry */
-#define SISL_AFU_RC_CAP_VIOLATION 0x21U /* either user error or
- * afu reset/master restart
- */
-#define SISL_AFU_RC_OUT_OF_DATA_BUFS 0x30U /* always retry */
-#define SISL_AFU_RC_DATA_DMA_ERR 0x31U /* see afu_extra
- * may retry if afu_retry is off
- */
-
- u8 scsi_rc; /* SCSI status byte, retry as appropriate */
-#define SISL_SCSI_RC_CHECK 0x02U
-#define SISL_SCSI_RC_BUSY 0x08u
-
- u8 fc_rc; /* retry */
- /*
- * We should only see fc_rc=0x57 (LINKDOWN) or 0x54(NOLOGI) for
- * commands that are in flight when a link goes down or is logged out.
- * If the link is down or logged out before AFU selects the port, either
- * it will choose the other port or we will get afu_rc=0x20 (no_channel)
- * if there is no valid port to use.
- *
- * ABORTPEND/ABORTOK/ABORTFAIL/TGTABORT can be retried, typically these
- * would happen if a frame is dropped and something times out.
- * NOLOGI or LINKDOWN can be retried if the other port is up.
- * RESIDERR can be retried as well.
- *
- * ABORTFAIL might indicate that lots of frames are getting CRC errors.
- * So it maybe retried once and reset the link if it happens again.
- * The link can also be reset on the CRC error threshold interrupt.
- */
-#define SISL_FC_RC_ABORTPEND 0x52 /* exchange timeout or abort request */
-#define SISL_FC_RC_WRABORTPEND 0x53 /* due to write XFER_RDY invalid */
-#define SISL_FC_RC_NOLOGI 0x54 /* port not logged in, in-flight cmds */
-#define SISL_FC_RC_NOEXP 0x55 /* FC protocol error or HW bug */
-#define SISL_FC_RC_INUSE 0x56 /* tag already in use, HW bug */
-#define SISL_FC_RC_LINKDOWN 0x57 /* link down, in-flight cmds */
-#define SISL_FC_RC_ABORTOK 0x58 /* pending abort completed w/success */
-#define SISL_FC_RC_ABORTFAIL 0x59 /* pending abort completed w/fail */
-#define SISL_FC_RC_RESID 0x5A /* ioasa underrun/overrun flags set */
-#define SISL_FC_RC_RESIDERR 0x5B /* actual data len does not match SCSI
- * reported len, possibly due to dropped
- * frames
- */
-#define SISL_FC_RC_TGTABORT 0x5C /* command aborted by target */
-};
-
-#define SISL_SENSE_DATA_LEN 20 /* Sense data length */
-#define SISL_WWID_DATA_LEN 16 /* WWID data length */
-
-/*
- * IOASA: 64 bytes & must follow IOARCB, min 16 byte alignment required,
- * host native endianness
- */
-struct sisl_ioasa {
- union {
- struct sisl_rc rc;
- u32 ioasc;
-#define SISL_IOASC_GOOD_COMPLETION 0x00000000U
- };
-
- union {
- u32 resid;
- u32 lunid_hi;
- };
-
- u8 port;
- u8 afu_extra;
- /* when afu_rc=0x04, 0x14, 0x31 (_xxx_DMA_ERR):
- * afu_exta contains PSL response code. Useful codes are:
- */
-#define SISL_AFU_DMA_ERR_PAGE_IN 0x0A /* AFU_retry_on_pagein Action
- * Enabled N/A
- * Disabled retry
- */
-#define SISL_AFU_DMA_ERR_INVALID_EA 0x0B /* this is a hard error
- * afu_rc Implies
- * 0x04, 0x14 master exit.
- * 0x31 user error.
- */
- /* when afu rc=0x20 (no channels):
- * afu_extra bits [4:5]: available portmask, [6:7]: requested portmask.
- */
-#define SISL_AFU_NO_CLANNELS_AMASK(afu_extra) (((afu_extra) & 0x0C) >> 2)
-#define SISL_AFU_NO_CLANNELS_RMASK(afu_extra) ((afu_extra) & 0x03)
-
- u8 scsi_extra;
- u8 fc_extra;
-
- union {
- u8 sense_data[SISL_SENSE_DATA_LEN];
- struct {
- u32 lunid_lo;
- u8 wwid[SISL_WWID_DATA_LEN];
- };
- };
-
- /* These fields are defined by the SISlite architecture for the
- * host to use as they see fit for their implementation.
- */
- union {
- u64 host_use[4];
- u8 host_use_b[32];
- };
-} __packed;
-
-#define SISL_RESP_HANDLE_T_BIT 0x1ULL /* Toggle bit */
-
-/* MMIO space is required to support only 64-bit access */
-
-/*
- * This AFU has two mechanisms to deal with endian-ness.
- * One is a global configuration (in the afu_config) register
- * below that specifies the endian-ness of the host.
- * The other is a per context (i.e. application) specification
- * controlled by the endian_ctrl field here. Since the master
- * context is one such application the master context's
- * endian-ness is set to be the same as the host.
- *
- * As per the SISlite spec, the MMIO registers are always
- * big endian.
- */
-#define SISL_ENDIAN_CTRL_BE 0x8000000000000080ULL
-#define SISL_ENDIAN_CTRL_LE 0x0000000000000000ULL
-
-#ifdef __BIG_ENDIAN
-#define SISL_ENDIAN_CTRL SISL_ENDIAN_CTRL_BE
-#else
-#define SISL_ENDIAN_CTRL SISL_ENDIAN_CTRL_LE
-#endif
-
-/* per context host transport MMIO */
-struct sisl_host_map {
- __be64 endian_ctrl; /* Per context Endian Control. The AFU will
- * operate on whatever the context is of the
- * host application.
- */
-
- __be64 intr_status; /* this sends LISN# programmed in ctx_ctrl.
- * Only recovery in a PERM_ERR is a context
- * exit since there is no way to tell which
- * command caused the error.
- */
-#define SISL_ISTATUS_PERM_ERR_LISN_3_EA 0x0400ULL /* b53, user error */
-#define SISL_ISTATUS_PERM_ERR_LISN_2_EA 0x0200ULL /* b54, user error */
-#define SISL_ISTATUS_PERM_ERR_LISN_1_EA 0x0100ULL /* b55, user error */
-#define SISL_ISTATUS_PERM_ERR_LISN_3_PASID 0x0080ULL /* b56, user error */
-#define SISL_ISTATUS_PERM_ERR_LISN_2_PASID 0x0040ULL /* b57, user error */
-#define SISL_ISTATUS_PERM_ERR_LISN_1_PASID 0x0020ULL /* b58, user error */
-#define SISL_ISTATUS_PERM_ERR_CMDROOM 0x0010ULL /* b59, user error */
-#define SISL_ISTATUS_PERM_ERR_RCB_READ 0x0008ULL /* b60, user error */
-#define SISL_ISTATUS_PERM_ERR_SA_WRITE 0x0004ULL /* b61, user error */
-#define SISL_ISTATUS_PERM_ERR_RRQ_WRITE 0x0002ULL /* b62, user error */
- /* Page in wait accessing RCB/IOASA/RRQ is reported in b63.
- * Same error in data/LXT/RHT access is reported via IOASA.
- */
-#define SISL_ISTATUS_TEMP_ERR_PAGEIN 0x0001ULL /* b63, can only be
- * generated when AFU
- * auto retry is
- * disabled. If user
- * can determine the
- * command that caused
- * the error, it can
- * be retried.
- */
-#define SISL_ISTATUS_UNMASK (0x07FFULL) /* 1 means unmasked */
-#define SISL_ISTATUS_MASK ~(SISL_ISTATUS_UNMASK) /* 1 means masked */
-
- __be64 intr_clear;
- __be64 intr_mask;
- __be64 ioarrin; /* only write what cmd_room permits */
- __be64 rrq_start; /* start & end are both inclusive */
- __be64 rrq_end; /* write sequence: start followed by end */
- __be64 cmd_room;
- __be64 ctx_ctrl; /* least significant byte or b56:63 is LISN# */
-#define SISL_CTX_CTRL_UNMAP_SECTOR 0x8000000000000000ULL /* b0 */
-#define SISL_CTX_CTRL_LISN_MASK (0xFFULL)
- __be64 mbox_w; /* restricted use */
- __be64 sq_start; /* Submission Queue (R/W): write sequence and */
- __be64 sq_end; /* inclusion semantics are the same as RRQ */
- __be64 sq_head; /* Submission Queue Head (R): for debugging */
- __be64 sq_tail; /* Submission Queue TAIL (R/W): next IOARCB */
- __be64 sq_ctx_reset; /* Submission Queue Context Reset (R/W) */
-};
-
-/* per context provisioning & control MMIO */
-struct sisl_ctrl_map {
- __be64 rht_start;
- __be64 rht_cnt_id;
- /* both cnt & ctx_id args must be ULL */
-#define SISL_RHT_CNT_ID(cnt, ctx_id) (((cnt) << 48) | ((ctx_id) << 32))
-
- __be64 ctx_cap; /* afu_rc below is when the capability is violated */
-#define SISL_CTX_CAP_PROXY_ISSUE 0x8000000000000000ULL /* afu_rc 0x21 */
-#define SISL_CTX_CAP_REAL_MODE 0x4000000000000000ULL /* afu_rc 0x21 */
-#define SISL_CTX_CAP_HOST_XLATE 0x2000000000000000ULL /* afu_rc 0x1a */
-#define SISL_CTX_CAP_PROXY_TARGET 0x1000000000000000ULL /* afu_rc 0x21 */
-#define SISL_CTX_CAP_AFU_CMD 0x0000000000000008ULL /* afu_rc 0x21 */
-#define SISL_CTX_CAP_GSCSI_CMD 0x0000000000000004ULL /* afu_rc 0x21 */
-#define SISL_CTX_CAP_WRITE_CMD 0x0000000000000002ULL /* afu_rc 0x21 */
-#define SISL_CTX_CAP_READ_CMD 0x0000000000000001ULL /* afu_rc 0x21 */
- __be64 mbox_r;
- __be64 lisn_pasid[2];
- /* pasid _a arg must be ULL */
-#define SISL_LISN_PASID(_a, _b) (((_a) << 32) | (_b))
- __be64 lisn_ea[3];
-};
-
-/* single copy global regs */
-struct sisl_global_regs {
- __be64 aintr_status;
- /*
- * In cxlflash, FC port/link are arranged in port pairs, each
- * gets a byte of status:
- *
- * *_OTHER: other err, FC_ERRCAP[31:20]
- * *_LOGO: target sent FLOGI/PLOGI/LOGO while logged in
- * *_CRC_T: CRC threshold exceeded
- * *_LOGI_R: login state machine timed out and retrying
- * *_LOGI_F: login failed, FC_ERROR[19:0]
- * *_LOGI_S: login succeeded
- * *_LINK_DN: link online to offline
- * *_LINK_UP: link offline to online
- */
-#define SISL_ASTATUS_FC2_OTHER 0x80000000ULL /* b32 */
-#define SISL_ASTATUS_FC2_LOGO 0x40000000ULL /* b33 */
-#define SISL_ASTATUS_FC2_CRC_T 0x20000000ULL /* b34 */
-#define SISL_ASTATUS_FC2_LOGI_R 0x10000000ULL /* b35 */
-#define SISL_ASTATUS_FC2_LOGI_F 0x08000000ULL /* b36 */
-#define SISL_ASTATUS_FC2_LOGI_S 0x04000000ULL /* b37 */
-#define SISL_ASTATUS_FC2_LINK_DN 0x02000000ULL /* b38 */
-#define SISL_ASTATUS_FC2_LINK_UP 0x01000000ULL /* b39 */
-
-#define SISL_ASTATUS_FC3_OTHER 0x00800000ULL /* b40 */
-#define SISL_ASTATUS_FC3_LOGO 0x00400000ULL /* b41 */
-#define SISL_ASTATUS_FC3_CRC_T 0x00200000ULL /* b42 */
-#define SISL_ASTATUS_FC3_LOGI_R 0x00100000ULL /* b43 */
-#define SISL_ASTATUS_FC3_LOGI_F 0x00080000ULL /* b44 */
-#define SISL_ASTATUS_FC3_LOGI_S 0x00040000ULL /* b45 */
-#define SISL_ASTATUS_FC3_LINK_DN 0x00020000ULL /* b46 */
-#define SISL_ASTATUS_FC3_LINK_UP 0x00010000ULL /* b47 */
-
-#define SISL_ASTATUS_FC0_OTHER 0x00008000ULL /* b48 */
-#define SISL_ASTATUS_FC0_LOGO 0x00004000ULL /* b49 */
-#define SISL_ASTATUS_FC0_CRC_T 0x00002000ULL /* b50 */
-#define SISL_ASTATUS_FC0_LOGI_R 0x00001000ULL /* b51 */
-#define SISL_ASTATUS_FC0_LOGI_F 0x00000800ULL /* b52 */
-#define SISL_ASTATUS_FC0_LOGI_S 0x00000400ULL /* b53 */
-#define SISL_ASTATUS_FC0_LINK_DN 0x00000200ULL /* b54 */
-#define SISL_ASTATUS_FC0_LINK_UP 0x00000100ULL /* b55 */
-
-#define SISL_ASTATUS_FC1_OTHER 0x00000080ULL /* b56 */
-#define SISL_ASTATUS_FC1_LOGO 0x00000040ULL /* b57 */
-#define SISL_ASTATUS_FC1_CRC_T 0x00000020ULL /* b58 */
-#define SISL_ASTATUS_FC1_LOGI_R 0x00000010ULL /* b59 */
-#define SISL_ASTATUS_FC1_LOGI_F 0x00000008ULL /* b60 */
-#define SISL_ASTATUS_FC1_LOGI_S 0x00000004ULL /* b61 */
-#define SISL_ASTATUS_FC1_LINK_DN 0x00000002ULL /* b62 */
-#define SISL_ASTATUS_FC1_LINK_UP 0x00000001ULL /* b63 */
-
-#define SISL_FC_INTERNAL_UNMASK 0x0000000300000000ULL /* 1 means unmasked */
-#define SISL_FC_INTERNAL_MASK ~(SISL_FC_INTERNAL_UNMASK)
-#define SISL_FC_INTERNAL_SHIFT 32
-
-#define SISL_FC_SHUTDOWN_NORMAL 0x0000000000000010ULL
-#define SISL_FC_SHUTDOWN_ABRUPT 0x0000000000000020ULL
-
-#define SISL_STATUS_SHUTDOWN_ACTIVE 0x0000000000000010ULL
-#define SISL_STATUS_SHUTDOWN_COMPLETE 0x0000000000000020ULL
-
-#define SISL_ASTATUS_UNMASK 0xFFFFFFFFULL /* 1 means unmasked */
-#define SISL_ASTATUS_MASK ~(SISL_ASTATUS_UNMASK) /* 1 means masked */
-
- __be64 aintr_clear;
- __be64 aintr_mask;
- __be64 afu_ctrl;
- __be64 afu_hb;
- __be64 afu_scratch_pad;
- __be64 afu_port_sel;
-#define SISL_AFUCONF_AR_IOARCB 0x4000ULL
-#define SISL_AFUCONF_AR_LXT 0x2000ULL
-#define SISL_AFUCONF_AR_RHT 0x1000ULL
-#define SISL_AFUCONF_AR_DATA 0x0800ULL
-#define SISL_AFUCONF_AR_RSRC 0x0400ULL
-#define SISL_AFUCONF_AR_IOASA 0x0200ULL
-#define SISL_AFUCONF_AR_RRQ 0x0100ULL
-/* Aggregate all Auto Retry Bits */
-#define SISL_AFUCONF_AR_ALL (SISL_AFUCONF_AR_IOARCB|SISL_AFUCONF_AR_LXT| \
- SISL_AFUCONF_AR_RHT|SISL_AFUCONF_AR_DATA| \
- SISL_AFUCONF_AR_RSRC|SISL_AFUCONF_AR_IOASA| \
- SISL_AFUCONF_AR_RRQ)
-#ifdef __BIG_ENDIAN
-#define SISL_AFUCONF_ENDIAN 0x0000ULL
-#else
-#define SISL_AFUCONF_ENDIAN 0x0020ULL
-#endif
-#define SISL_AFUCONF_MBOX_CLR_READ 0x0010ULL
- __be64 afu_config;
- __be64 rsvd[0xf8];
- __le64 afu_version;
- __be64 interface_version;
-#define SISL_INTVER_CAP_SHIFT 16
-#define SISL_INTVER_MAJ_SHIFT 8
-#define SISL_INTVER_CAP_MASK 0xFFFFFFFF00000000ULL
-#define SISL_INTVER_MAJ_MASK 0x00000000FFFF0000ULL
-#define SISL_INTVER_MIN_MASK 0x000000000000FFFFULL
-#define SISL_INTVER_CAP_IOARRIN_CMD_MODE 0x800000000000ULL
-#define SISL_INTVER_CAP_SQ_CMD_MODE 0x400000000000ULL
-#define SISL_INTVER_CAP_RESERVED_CMD_MODE_A 0x200000000000ULL
-#define SISL_INTVER_CAP_RESERVED_CMD_MODE_B 0x100000000000ULL
-#define SISL_INTVER_CAP_LUN_PROVISION 0x080000000000ULL
-#define SISL_INTVER_CAP_AFU_DEBUG 0x040000000000ULL
-#define SISL_INTVER_CAP_OCXL_LISN 0x020000000000ULL
-};
-
-#define CXLFLASH_NUM_FC_PORTS_PER_BANK 2 /* fixed # of ports per bank */
-#define CXLFLASH_MAX_FC_BANKS 2 /* max # of banks supported */
-#define CXLFLASH_MAX_FC_PORTS (CXLFLASH_NUM_FC_PORTS_PER_BANK * \
- CXLFLASH_MAX_FC_BANKS)
-#define CXLFLASH_MAX_CONTEXT 512 /* number of contexts per AFU */
-#define CXLFLASH_NUM_VLUNS 512 /* number of vluns per AFU/port */
-#define CXLFLASH_NUM_REGS 512 /* number of registers per port */
-
-struct fc_port_bank {
- __be64 fc_port_regs[CXLFLASH_NUM_FC_PORTS_PER_BANK][CXLFLASH_NUM_REGS];
- __be64 fc_port_luns[CXLFLASH_NUM_FC_PORTS_PER_BANK][CXLFLASH_NUM_VLUNS];
-};
-
-struct sisl_global_map {
- union {
- struct sisl_global_regs regs;
- char page0[SIZE_4K]; /* page 0 */
- };
-
- char page1[SIZE_4K]; /* page 1 */
-
- struct fc_port_bank bank[CXLFLASH_MAX_FC_BANKS]; /* pages 2 - 9 */
-
- /* pages 10 - 15 are reserved */
-
-};
-
-/*
- * CXL Flash Memory Map
- *
- * +-------------------------------+
- * | 512 * 64 KB User MMIO |
- * | (per context) |
- * | User Accessible |
- * +-------------------------------+
- * | 512 * 128 B per context |
- * | Provisioning and Control |
- * | Trusted Process accessible |
- * +-------------------------------+
- * | 64 KB Global |
- * | Trusted Process accessible |
- * +-------------------------------+
- */
-struct cxlflash_afu_map {
- union {
- struct sisl_host_map host;
- char harea[SIZE_64K]; /* 64KB each */
- } hosts[CXLFLASH_MAX_CONTEXT];
-
- union {
- struct sisl_ctrl_map ctrl;
- char carea[cache_line_size()]; /* 128B each */
- } ctrls[CXLFLASH_MAX_CONTEXT];
-
- union {
- struct sisl_global_map global;
- char garea[SIZE_64K]; /* 64KB single block */
- };
-};
-
-/*
- * LXT - LBA Translation Table
- * LXT control blocks
- */
-struct sisl_lxt_entry {
- u64 rlba_base; /* bits 0:47 is base
- * b48:55 is lun index
- * b58:59 is write & read perms
- * (if no perm, afu_rc=0x15)
- * b60:63 is port_sel mask
- */
-};
-
-/*
- * RHT - Resource Handle Table
- * Per the SISlite spec, RHT entries are to be 16-byte aligned
- */
-struct sisl_rht_entry {
- struct sisl_lxt_entry *lxt_start;
- u32 lxt_cnt;
- u16 rsvd;
- u8 fp; /* format & perm nibbles.
- * (if no perm, afu_rc=0x05)
- */
- u8 nmask;
-} __packed __aligned(16);
-
-struct sisl_rht_entry_f1 {
- u64 lun_id;
- union {
- struct {
- u8 valid;
- u8 rsvd[5];
- u8 fp;
- u8 port_sel;
- };
-
- u64 dw;
- };
-} __packed __aligned(16);
-
-/* make the fp byte */
-#define SISL_RHT_FP(fmt, perm) (((fmt) << 4) | (perm))
-
-/* make the fp byte for a clone from a source fp and clone flags
- * flags must be only 2 LSB bits.
- */
-#define SISL_RHT_FP_CLONE(src_fp, cln_flags) ((src_fp) & (0xFC | (cln_flags)))
-
-#define RHT_PERM_READ 0x01U
-#define RHT_PERM_WRITE 0x02U
-#define RHT_PERM_RW (RHT_PERM_READ | RHT_PERM_WRITE)
-
-/* extract the perm bits from a fp */
-#define SISL_RHT_PERM(fp) ((fp) & RHT_PERM_RW)
-
-#define PORT0 0x01U
-#define PORT1 0x02U
-#define PORT2 0x04U
-#define PORT3 0x08U
-#define PORT_MASK(_n) ((1 << (_n)) - 1)
-
-/* AFU Sync Mode byte */
-#define AFU_LW_SYNC 0x0U
-#define AFU_HW_SYNC 0x1U
-#define AFU_GSYNC 0x2U
-
-/* Special Task Management Function CDB */
-#define TMF_LUN_RESET 0x1U
-#define TMF_CLEAR_ACA 0x2U
-
-#endif /* _SISLITE_H */
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c
deleted file mode 100644
index 97631f48e19d..000000000000
--- a/drivers/scsi/cxlflash/superpipe.c
+++ /dev/null
@@ -1,2218 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#include <linux/delay.h>
-#include <linux/file.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/syscalls.h>
-#include <linux/unaligned.h>
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_eh.h>
-#include <uapi/scsi/cxlflash_ioctl.h>
-
-#include "sislite.h"
-#include "common.h"
-#include "vlun.h"
-#include "superpipe.h"
-
-struct cxlflash_global global;
-
-/**
- * marshal_rele_to_resize() - translate release to resize structure
- * @release: Source structure from which to translate/copy.
- * @resize: Destination structure for the translate/copy.
- */
-static void marshal_rele_to_resize(struct dk_cxlflash_release *release,
- struct dk_cxlflash_resize *resize)
-{
- resize->hdr = release->hdr;
- resize->context_id = release->context_id;
- resize->rsrc_handle = release->rsrc_handle;
-}
-
-/**
- * marshal_det_to_rele() - translate detach to release structure
- * @detach: Destination structure for the translate/copy.
- * @release: Source structure from which to translate/copy.
- */
-static void marshal_det_to_rele(struct dk_cxlflash_detach *detach,
- struct dk_cxlflash_release *release)
-{
- release->hdr = detach->hdr;
- release->context_id = detach->context_id;
-}
-
-/**
- * marshal_udir_to_rele() - translate udirect to release structure
- * @udirect: Source structure from which to translate/copy.
- * @release: Destination structure for the translate/copy.
- */
-static void marshal_udir_to_rele(struct dk_cxlflash_udirect *udirect,
- struct dk_cxlflash_release *release)
-{
- release->hdr = udirect->hdr;
- release->context_id = udirect->context_id;
- release->rsrc_handle = udirect->rsrc_handle;
-}
-
-/**
- * cxlflash_free_errpage() - frees resources associated with global error page
- */
-void cxlflash_free_errpage(void)
-{
-
- mutex_lock(&global.mutex);
- if (global.err_page) {
- __free_page(global.err_page);
- global.err_page = NULL;
- }
- mutex_unlock(&global.mutex);
-}
-
-/**
- * cxlflash_stop_term_user_contexts() - stops/terminates known user contexts
- * @cfg: Internal structure associated with the host.
- *
- * When the host needs to go down, all users must be quiesced and their
- * memory freed. This is accomplished by putting the contexts in error
- * state which will notify the user and let them 'drive' the tear down.
- * Meanwhile, this routine camps until all user contexts have been removed.
- *
- * Note that the main loop in this routine will always execute at least once
- * to flush the reset_waitq.
- */
-void cxlflash_stop_term_user_contexts(struct cxlflash_cfg *cfg)
-{
- struct device *dev = &cfg->dev->dev;
- int i, found = true;
-
- cxlflash_mark_contexts_error(cfg);
-
- while (true) {
- for (i = 0; i < MAX_CONTEXT; i++)
- if (cfg->ctx_tbl[i]) {
- found = true;
- break;
- }
-
- if (!found && list_empty(&cfg->ctx_err_recovery))
- return;
-
- dev_dbg(dev, "%s: Wait for user contexts to quiesce...\n",
- __func__);
- wake_up_all(&cfg->reset_waitq);
- ssleep(1);
- found = false;
- }
-}
-
-/**
- * find_error_context() - locates a context by cookie on the error recovery list
- * @cfg: Internal structure associated with the host.
- * @rctxid: Desired context by id.
- * @file: Desired context by file.
- *
- * Return: Found context on success, NULL on failure
- */
-static struct ctx_info *find_error_context(struct cxlflash_cfg *cfg, u64 rctxid,
- struct file *file)
-{
- struct ctx_info *ctxi;
-
- list_for_each_entry(ctxi, &cfg->ctx_err_recovery, list)
- if ((ctxi->ctxid == rctxid) || (ctxi->file == file))
- return ctxi;
-
- return NULL;
-}
-
-/**
- * get_context() - obtains a validated and locked context reference
- * @cfg: Internal structure associated with the host.
- * @rctxid: Desired context (raw, un-decoded format).
- * @arg: LUN information or file associated with request.
- * @ctx_ctrl: Control information to 'steer' desired lookup.
- *
- * NOTE: despite the name pid, in linux, current->pid actually refers
- * to the lightweight process id (tid) and can change if the process is
- * multi threaded. The tgid remains constant for the process and only changes
- * when the process of fork. For all intents and purposes, think of tgid
- * as a pid in the traditional sense.
- *
- * Return: Validated context on success, NULL on failure
- */
-struct ctx_info *get_context(struct cxlflash_cfg *cfg, u64 rctxid,
- void *arg, enum ctx_ctrl ctx_ctrl)
-{
- struct device *dev = &cfg->dev->dev;
- struct ctx_info *ctxi = NULL;
- struct lun_access *lun_access = NULL;
- struct file *file = NULL;
- struct llun_info *lli = arg;
- u64 ctxid = DECODE_CTXID(rctxid);
- int rc;
- pid_t pid = task_tgid_nr(current), ctxpid = 0;
-
- if (ctx_ctrl & CTX_CTRL_FILE) {
- lli = NULL;
- file = (struct file *)arg;
- }
-
- if (ctx_ctrl & CTX_CTRL_CLONE)
- pid = task_ppid_nr(current);
-
- if (likely(ctxid < MAX_CONTEXT)) {
- while (true) {
- mutex_lock(&cfg->ctx_tbl_list_mutex);
- ctxi = cfg->ctx_tbl[ctxid];
- if (ctxi)
- if ((file && (ctxi->file != file)) ||
- (!file && (ctxi->ctxid != rctxid)))
- ctxi = NULL;
-
- if ((ctx_ctrl & CTX_CTRL_ERR) ||
- (!ctxi && (ctx_ctrl & CTX_CTRL_ERR_FALLBACK)))
- ctxi = find_error_context(cfg, rctxid, file);
- if (!ctxi) {
- mutex_unlock(&cfg->ctx_tbl_list_mutex);
- goto out;
- }
-
- /*
- * Need to acquire ownership of the context while still
- * under the table/list lock to serialize with a remove
- * thread. Use the 'try' to avoid stalling the
- * table/list lock for a single context.
- *
- * Note that the lock order is:
- *
- * cfg->ctx_tbl_list_mutex -> ctxi->mutex
- *
- * Therefore release ctx_tbl_list_mutex before retrying.
- */
- rc = mutex_trylock(&ctxi->mutex);
- mutex_unlock(&cfg->ctx_tbl_list_mutex);
- if (rc)
- break; /* got the context's lock! */
- }
-
- if (ctxi->unavail)
- goto denied;
-
- ctxpid = ctxi->pid;
- if (likely(!(ctx_ctrl & CTX_CTRL_NOPID)))
- if (pid != ctxpid)
- goto denied;
-
- if (lli) {
- list_for_each_entry(lun_access, &ctxi->luns, list)
- if (lun_access->lli == lli)
- goto out;
- goto denied;
- }
- }
-
-out:
- dev_dbg(dev, "%s: rctxid=%016llx ctxinfo=%p ctxpid=%u pid=%u "
- "ctx_ctrl=%u\n", __func__, rctxid, ctxi, ctxpid, pid,
- ctx_ctrl);
-
- return ctxi;
-
-denied:
- mutex_unlock(&ctxi->mutex);
- ctxi = NULL;
- goto out;
-}
-
-/**
- * put_context() - release a context that was retrieved from get_context()
- * @ctxi: Context to release.
- *
- * For now, releasing the context equates to unlocking it's mutex.
- */
-void put_context(struct ctx_info *ctxi)
-{
- mutex_unlock(&ctxi->mutex);
-}
-
-/**
- * afu_attach() - attach a context to the AFU
- * @cfg: Internal structure associated with the host.
- * @ctxi: Context to attach.
- *
- * Upon setting the context capabilities, they must be confirmed with
- * a read back operation as the context might have been closed since
- * the mailbox was unlocked. When this occurs, registration is failed.
- *
- * Return: 0 on success, -errno on failure
- */
-static int afu_attach(struct cxlflash_cfg *cfg, struct ctx_info *ctxi)
-{
- struct device *dev = &cfg->dev->dev;
- struct afu *afu = cfg->afu;
- struct sisl_ctrl_map __iomem *ctrl_map = ctxi->ctrl_map;
- int rc = 0;
- struct hwq *hwq = get_hwq(afu, PRIMARY_HWQ);
- u64 val;
- int i;
-
- /* Unlock cap and restrict user to read/write cmds in translated mode */
- readq_be(&ctrl_map->mbox_r);
- val = (SISL_CTX_CAP_READ_CMD | SISL_CTX_CAP_WRITE_CMD);
- writeq_be(val, &ctrl_map->ctx_cap);
- val = readq_be(&ctrl_map->ctx_cap);
- if (val != (SISL_CTX_CAP_READ_CMD | SISL_CTX_CAP_WRITE_CMD)) {
- dev_err(dev, "%s: ctx may be closed val=%016llx\n",
- __func__, val);
- rc = -EAGAIN;
- goto out;
- }
-
- if (afu_is_ocxl_lisn(afu)) {
- /* Set up the LISN effective address for each interrupt */
- for (i = 0; i < ctxi->irqs; i++) {
- val = cfg->ops->get_irq_objhndl(ctxi->ctx, i);
- writeq_be(val, &ctrl_map->lisn_ea[i]);
- }
-
- /* Use primary HWQ PASID as identifier for all interrupts */
- val = hwq->ctx_hndl;
- writeq_be(SISL_LISN_PASID(val, val), &ctrl_map->lisn_pasid[0]);
- writeq_be(SISL_LISN_PASID(0UL, val), &ctrl_map->lisn_pasid[1]);
- }
-
- /* Set up MMIO registers pointing to the RHT */
- writeq_be((u64)ctxi->rht_start, &ctrl_map->rht_start);
- val = SISL_RHT_CNT_ID((u64)MAX_RHT_PER_CONTEXT, (u64)(hwq->ctx_hndl));
- writeq_be(val, &ctrl_map->rht_cnt_id);
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * read_cap16() - issues a SCSI READ_CAP16 command
- * @sdev: SCSI device associated with LUN.
- * @lli: LUN destined for capacity request.
- *
- * The READ_CAP16 can take quite a while to complete. Should an EEH occur while
- * in scsi_execute_cmd(), the EEH handler will attempt to recover. As part of
- * the recovery, the handler drains all currently running ioctls, waiting until
- * they have completed before proceeding with a reset. As this routine is used
- * on the ioctl path, this can create a condition where the EEH handler becomes
- * stuck, infinitely waiting for this ioctl thread. To avoid this behavior,
- * temporarily unmark this thread as an ioctl thread by releasing the ioctl
- * read semaphore. This will allow the EEH handler to proceed with a recovery
- * while this thread is still running. Once the scsi_execute_cmd() returns,
- * reacquire the ioctl read semaphore and check the adapter state in case it
- * changed while inside of scsi_execute_cmd(). The state check will wait if the
- * adapter is still being recovered or return a failure if the recovery failed.
- * In the event that the adapter reset failed, simply return the failure as the
- * ioctl would be unable to continue.
- *
- * Note that the above puts a requirement on this routine to only be called on
- * an ioctl thread.
- *
- * Return: 0 on success, -errno on failure
- */
-static int read_cap16(struct scsi_device *sdev, struct llun_info *lli)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct glun_info *gli = lli->parent;
- struct scsi_sense_hdr sshdr;
- const struct scsi_exec_args exec_args = {
- .sshdr = &sshdr,
- };
- u8 *cmd_buf = NULL;
- u8 *scsi_cmd = NULL;
- int rc = 0;
- int result = 0;
- int retry_cnt = 0;
- u32 to = CMD_TIMEOUT * HZ;
-
-retry:
- cmd_buf = kzalloc(CMD_BUFSIZE, GFP_KERNEL);
- scsi_cmd = kzalloc(MAX_COMMAND_SIZE, GFP_KERNEL);
- if (unlikely(!cmd_buf || !scsi_cmd)) {
- rc = -ENOMEM;
- goto out;
- }
-
- scsi_cmd[0] = SERVICE_ACTION_IN_16; /* read cap(16) */
- scsi_cmd[1] = SAI_READ_CAPACITY_16; /* service action */
- put_unaligned_be32(CMD_BUFSIZE, &scsi_cmd[10]);
-
- dev_dbg(dev, "%s: %ssending cmd(%02x)\n", __func__,
- retry_cnt ? "re" : "", scsi_cmd[0]);
-
- /* Drop the ioctl read semaphore across lengthy call */
- up_read(&cfg->ioctl_rwsem);
- result = scsi_execute_cmd(sdev, scsi_cmd, REQ_OP_DRV_IN, cmd_buf,
- CMD_BUFSIZE, to, CMD_RETRIES, &exec_args);
- down_read(&cfg->ioctl_rwsem);
- rc = check_state(cfg);
- if (rc) {
- dev_err(dev, "%s: Failed state result=%08x\n",
- __func__, result);
- rc = -ENODEV;
- goto out;
- }
-
- if (result > 0 && scsi_sense_valid(&sshdr)) {
- if (result & SAM_STAT_CHECK_CONDITION) {
- switch (sshdr.sense_key) {
- case NO_SENSE:
- case RECOVERED_ERROR:
- case NOT_READY:
- result &= ~SAM_STAT_CHECK_CONDITION;
- break;
- case UNIT_ATTENTION:
- switch (sshdr.asc) {
- case 0x29: /* Power on Reset or Device Reset */
- fallthrough;
- case 0x2A: /* Device capacity changed */
- case 0x3F: /* Report LUNs changed */
- /* Retry the command once more */
- if (retry_cnt++ < 1) {
- kfree(cmd_buf);
- kfree(scsi_cmd);
- goto retry;
- }
- }
- break;
- default:
- break;
- }
- }
- }
-
- if (result) {
- dev_err(dev, "%s: command failed, result=%08x\n",
- __func__, result);
- rc = -EIO;
- goto out;
- }
-
- /*
- * Read cap was successful, grab values from the buffer;
- * note that we don't need to worry about unaligned access
- * as the buffer is allocated on an aligned boundary.
- */
- mutex_lock(&gli->mutex);
- gli->max_lba = be64_to_cpu(*((__be64 *)&cmd_buf[0]));
- gli->blk_len = be32_to_cpu(*((__be32 *)&cmd_buf[8]));
- mutex_unlock(&gli->mutex);
-
-out:
- kfree(cmd_buf);
- kfree(scsi_cmd);
-
- dev_dbg(dev, "%s: maxlba=%lld blklen=%d rc=%d\n",
- __func__, gli->max_lba, gli->blk_len, rc);
- return rc;
-}
-
-/**
- * get_rhte() - obtains validated resource handle table entry reference
- * @ctxi: Context owning the resource handle.
- * @rhndl: Resource handle associated with entry.
- * @lli: LUN associated with request.
- *
- * Return: Validated RHTE on success, NULL on failure
- */
-struct sisl_rht_entry *get_rhte(struct ctx_info *ctxi, res_hndl_t rhndl,
- struct llun_info *lli)
-{
- struct cxlflash_cfg *cfg = ctxi->cfg;
- struct device *dev = &cfg->dev->dev;
- struct sisl_rht_entry *rhte = NULL;
-
- if (unlikely(!ctxi->rht_start)) {
- dev_dbg(dev, "%s: Context does not have allocated RHT\n",
- __func__);
- goto out;
- }
-
- if (unlikely(rhndl >= MAX_RHT_PER_CONTEXT)) {
- dev_dbg(dev, "%s: Bad resource handle rhndl=%d\n",
- __func__, rhndl);
- goto out;
- }
-
- if (unlikely(ctxi->rht_lun[rhndl] != lli)) {
- dev_dbg(dev, "%s: Bad resource handle LUN rhndl=%d\n",
- __func__, rhndl);
- goto out;
- }
-
- rhte = &ctxi->rht_start[rhndl];
- if (unlikely(rhte->nmask == 0)) {
- dev_dbg(dev, "%s: Unopened resource handle rhndl=%d\n",
- __func__, rhndl);
- rhte = NULL;
- goto out;
- }
-
-out:
- return rhte;
-}
-
-/**
- * rhte_checkout() - obtains free/empty resource handle table entry
- * @ctxi: Context owning the resource handle.
- * @lli: LUN associated with request.
- *
- * Return: Free RHTE on success, NULL on failure
- */
-struct sisl_rht_entry *rhte_checkout(struct ctx_info *ctxi,
- struct llun_info *lli)
-{
- struct cxlflash_cfg *cfg = ctxi->cfg;
- struct device *dev = &cfg->dev->dev;
- struct sisl_rht_entry *rhte = NULL;
- int i;
-
- /* Find a free RHT entry */
- for (i = 0; i < MAX_RHT_PER_CONTEXT; i++)
- if (ctxi->rht_start[i].nmask == 0) {
- rhte = &ctxi->rht_start[i];
- ctxi->rht_out++;
- break;
- }
-
- if (likely(rhte))
- ctxi->rht_lun[i] = lli;
-
- dev_dbg(dev, "%s: returning rhte=%p index=%d\n", __func__, rhte, i);
- return rhte;
-}
-
-/**
- * rhte_checkin() - releases a resource handle table entry
- * @ctxi: Context owning the resource handle.
- * @rhte: RHTE to release.
- */
-void rhte_checkin(struct ctx_info *ctxi,
- struct sisl_rht_entry *rhte)
-{
- u32 rsrc_handle = rhte - ctxi->rht_start;
-
- rhte->nmask = 0;
- rhte->fp = 0;
- ctxi->rht_out--;
- ctxi->rht_lun[rsrc_handle] = NULL;
- ctxi->rht_needs_ws[rsrc_handle] = false;
-}
-
-/**
- * rht_format1() - populates a RHTE for format 1
- * @rhte: RHTE to populate.
- * @lun_id: LUN ID of LUN associated with RHTE.
- * @perm: Desired permissions for RHTE.
- * @port_sel: Port selection mask
- */
-static void rht_format1(struct sisl_rht_entry *rhte, u64 lun_id, u32 perm,
- u32 port_sel)
-{
- /*
- * Populate the Format 1 RHT entry for direct access (physical
- * LUN) using the synchronization sequence defined in the
- * SISLite specification.
- */
- struct sisl_rht_entry_f1 dummy = { 0 };
- struct sisl_rht_entry_f1 *rhte_f1 = (struct sisl_rht_entry_f1 *)rhte;
-
- memset(rhte_f1, 0, sizeof(*rhte_f1));
- rhte_f1->fp = SISL_RHT_FP(1U, 0);
- dma_wmb(); /* Make setting of format bit visible */
-
- rhte_f1->lun_id = lun_id;
- dma_wmb(); /* Make setting of LUN id visible */
-
- /*
- * Use a dummy RHT Format 1 entry to build the second dword
- * of the entry that must be populated in a single write when
- * enabled (valid bit set to TRUE).
- */
- dummy.valid = 0x80;
- dummy.fp = SISL_RHT_FP(1U, perm);
- dummy.port_sel = port_sel;
- rhte_f1->dw = dummy.dw;
-
- dma_wmb(); /* Make remaining RHT entry fields visible */
-}
-
-/**
- * cxlflash_lun_attach() - attaches a user to a LUN and manages the LUN's mode
- * @gli: LUN to attach.
- * @mode: Desired mode of the LUN.
- * @locked: Mutex status on current thread.
- *
- * Return: 0 on success, -errno on failure
- */
-int cxlflash_lun_attach(struct glun_info *gli, enum lun_mode mode, bool locked)
-{
- int rc = 0;
-
- if (!locked)
- mutex_lock(&gli->mutex);
-
- if (gli->mode == MODE_NONE)
- gli->mode = mode;
- else if (gli->mode != mode) {
- pr_debug("%s: gli_mode=%d requested_mode=%d\n",
- __func__, gli->mode, mode);
- rc = -EINVAL;
- goto out;
- }
-
- gli->users++;
- WARN_ON(gli->users <= 0);
-out:
- pr_debug("%s: Returning rc=%d gli->mode=%u gli->users=%u\n",
- __func__, rc, gli->mode, gli->users);
- if (!locked)
- mutex_unlock(&gli->mutex);
- return rc;
-}
-
-/**
- * cxlflash_lun_detach() - detaches a user from a LUN and resets the LUN's mode
- * @gli: LUN to detach.
- *
- * When resetting the mode, terminate block allocation resources as they
- * are no longer required (service is safe to call even when block allocation
- * resources were not present - such as when transitioning from physical mode).
- * These resources will be reallocated when needed (subsequent transition to
- * virtual mode).
- */
-void cxlflash_lun_detach(struct glun_info *gli)
-{
- mutex_lock(&gli->mutex);
- WARN_ON(gli->mode == MODE_NONE);
- if (--gli->users == 0) {
- gli->mode = MODE_NONE;
- cxlflash_ba_terminate(&gli->blka.ba_lun);
- }
- pr_debug("%s: gli->users=%u\n", __func__, gli->users);
- WARN_ON(gli->users < 0);
- mutex_unlock(&gli->mutex);
-}
-
-/**
- * _cxlflash_disk_release() - releases the specified resource entry
- * @sdev: SCSI device associated with LUN.
- * @ctxi: Context owning resources.
- * @release: Release ioctl data structure.
- *
- * For LUNs in virtual mode, the virtual LUN associated with the specified
- * resource handle is resized to 0 prior to releasing the RHTE. Note that the
- * AFU sync should _not_ be performed when the context is sitting on the error
- * recovery list. A context on the error recovery list is not known to the AFU
- * due to reset. When the context is recovered, it will be reattached and made
- * known again to the AFU.
- *
- * Return: 0 on success, -errno on failure
- */
-int _cxlflash_disk_release(struct scsi_device *sdev,
- struct ctx_info *ctxi,
- struct dk_cxlflash_release *release)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct afu *afu = cfg->afu;
- bool put_ctx = false;
-
- struct dk_cxlflash_resize size;
- res_hndl_t rhndl = release->rsrc_handle;
-
- int rc = 0;
- int rcr = 0;
- u64 ctxid = DECODE_CTXID(release->context_id),
- rctxid = release->context_id;
-
- struct sisl_rht_entry *rhte;
- struct sisl_rht_entry_f1 *rhte_f1;
-
- dev_dbg(dev, "%s: ctxid=%llu rhndl=%llu gli->mode=%u gli->users=%u\n",
- __func__, ctxid, release->rsrc_handle, gli->mode, gli->users);
-
- if (!ctxi) {
- ctxi = get_context(cfg, rctxid, lli, CTX_CTRL_ERR_FALLBACK);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%llu\n",
- __func__, ctxid);
- rc = -EINVAL;
- goto out;
- }
-
- put_ctx = true;
- }
-
- rhte = get_rhte(ctxi, rhndl, lli);
- if (unlikely(!rhte)) {
- dev_dbg(dev, "%s: Bad resource handle rhndl=%d\n",
- __func__, rhndl);
- rc = -EINVAL;
- goto out;
- }
-
- /*
- * Resize to 0 for virtual LUNS by setting the size
- * to 0. This will clear LXT_START and LXT_CNT fields
- * in the RHT entry and properly sync with the AFU.
- *
- * Afterwards we clear the remaining fields.
- */
- switch (gli->mode) {
- case MODE_VIRTUAL:
- marshal_rele_to_resize(release, &size);
- size.req_size = 0;
- rc = _cxlflash_vlun_resize(sdev, ctxi, &size);
- if (rc) {
- dev_dbg(dev, "%s: resize failed rc %d\n", __func__, rc);
- goto out;
- }
-
- break;
- case MODE_PHYSICAL:
- /*
- * Clear the Format 1 RHT entry for direct access
- * (physical LUN) using the synchronization sequence
- * defined in the SISLite specification.
- */
- rhte_f1 = (struct sisl_rht_entry_f1 *)rhte;
-
- rhte_f1->valid = 0;
- dma_wmb(); /* Make revocation of RHT entry visible */
-
- rhte_f1->lun_id = 0;
- dma_wmb(); /* Make clearing of LUN id visible */
-
- rhte_f1->dw = 0;
- dma_wmb(); /* Make RHT entry bottom-half clearing visible */
-
- if (!ctxi->err_recovery_active) {
- rcr = cxlflash_afu_sync(afu, ctxid, rhndl, AFU_HW_SYNC);
- if (unlikely(rcr))
- dev_dbg(dev, "%s: AFU sync failed rc=%d\n",
- __func__, rcr);
- }
- break;
- default:
- WARN(1, "Unsupported LUN mode!");
- goto out;
- }
-
- rhte_checkin(ctxi, rhte);
- cxlflash_lun_detach(gli);
-
-out:
- if (put_ctx)
- put_context(ctxi);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-int cxlflash_disk_release(struct scsi_device *sdev, void *release)
-{
- return _cxlflash_disk_release(sdev, NULL, release);
-}
-
-/**
- * destroy_context() - releases a context
- * @cfg: Internal structure associated with the host.
- * @ctxi: Context to release.
- *
- * This routine is safe to be called with a a non-initialized context.
- * Also note that the routine conditionally checks for the existence
- * of the context control map before clearing the RHT registers and
- * context capabilities because it is possible to destroy a context
- * while the context is in the error state (previous mapping was
- * removed [so there is no need to worry about clearing] and context
- * is waiting for a new mapping).
- */
-static void destroy_context(struct cxlflash_cfg *cfg,
- struct ctx_info *ctxi)
-{
- struct afu *afu = cfg->afu;
-
- if (ctxi->initialized) {
- WARN_ON(!list_empty(&ctxi->luns));
-
- /* Clear RHT registers and drop all capabilities for context */
- if (afu->afu_map && ctxi->ctrl_map) {
- writeq_be(0, &ctxi->ctrl_map->rht_start);
- writeq_be(0, &ctxi->ctrl_map->rht_cnt_id);
- writeq_be(0, &ctxi->ctrl_map->ctx_cap);
- }
- }
-
- /* Free memory associated with context */
- free_page((ulong)ctxi->rht_start);
- kfree(ctxi->rht_needs_ws);
- kfree(ctxi->rht_lun);
- kfree(ctxi);
-}
-
-/**
- * create_context() - allocates and initializes a context
- * @cfg: Internal structure associated with the host.
- *
- * Return: Allocated context on success, NULL on failure
- */
-static struct ctx_info *create_context(struct cxlflash_cfg *cfg)
-{
- struct device *dev = &cfg->dev->dev;
- struct ctx_info *ctxi = NULL;
- struct llun_info **lli = NULL;
- u8 *ws = NULL;
- struct sisl_rht_entry *rhte;
-
- ctxi = kzalloc(sizeof(*ctxi), GFP_KERNEL);
- lli = kzalloc((MAX_RHT_PER_CONTEXT * sizeof(*lli)), GFP_KERNEL);
- ws = kzalloc((MAX_RHT_PER_CONTEXT * sizeof(*ws)), GFP_KERNEL);
- if (unlikely(!ctxi || !lli || !ws)) {
- dev_err(dev, "%s: Unable to allocate context\n", __func__);
- goto err;
- }
-
- rhte = (struct sisl_rht_entry *)get_zeroed_page(GFP_KERNEL);
- if (unlikely(!rhte)) {
- dev_err(dev, "%s: Unable to allocate RHT\n", __func__);
- goto err;
- }
-
- ctxi->rht_lun = lli;
- ctxi->rht_needs_ws = ws;
- ctxi->rht_start = rhte;
-out:
- return ctxi;
-
-err:
- kfree(ws);
- kfree(lli);
- kfree(ctxi);
- ctxi = NULL;
- goto out;
-}
-
-/**
- * init_context() - initializes a previously allocated context
- * @ctxi: Previously allocated context
- * @cfg: Internal structure associated with the host.
- * @ctx: Previously obtained context cookie.
- * @ctxid: Previously obtained process element associated with CXL context.
- * @file: Previously obtained file associated with CXL context.
- * @perms: User-specified permissions.
- * @irqs: User-specified number of interrupts.
- */
-static void init_context(struct ctx_info *ctxi, struct cxlflash_cfg *cfg,
- void *ctx, int ctxid, struct file *file, u32 perms,
- u64 irqs)
-{
- struct afu *afu = cfg->afu;
-
- ctxi->rht_perms = perms;
- ctxi->ctrl_map = &afu->afu_map->ctrls[ctxid].ctrl;
- ctxi->ctxid = ENCODE_CTXID(ctxi, ctxid);
- ctxi->irqs = irqs;
- ctxi->pid = task_tgid_nr(current); /* tgid = pid */
- ctxi->ctx = ctx;
- ctxi->cfg = cfg;
- ctxi->file = file;
- ctxi->initialized = true;
- mutex_init(&ctxi->mutex);
- kref_init(&ctxi->kref);
- INIT_LIST_HEAD(&ctxi->luns);
- INIT_LIST_HEAD(&ctxi->list); /* initialize for list_empty() */
-}
-
-/**
- * remove_context() - context kref release handler
- * @kref: Kernel reference associated with context to be removed.
- *
- * When a context no longer has any references it can safely be removed
- * from global access and destroyed. Note that it is assumed the thread
- * relinquishing access to the context holds its mutex.
- */
-static void remove_context(struct kref *kref)
-{
- struct ctx_info *ctxi = container_of(kref, struct ctx_info, kref);
- struct cxlflash_cfg *cfg = ctxi->cfg;
- u64 ctxid = DECODE_CTXID(ctxi->ctxid);
-
- /* Remove context from table/error list */
- WARN_ON(!mutex_is_locked(&ctxi->mutex));
- ctxi->unavail = true;
- mutex_unlock(&ctxi->mutex);
- mutex_lock(&cfg->ctx_tbl_list_mutex);
- mutex_lock(&ctxi->mutex);
-
- if (!list_empty(&ctxi->list))
- list_del(&ctxi->list);
- cfg->ctx_tbl[ctxid] = NULL;
- mutex_unlock(&cfg->ctx_tbl_list_mutex);
- mutex_unlock(&ctxi->mutex);
-
- /* Context now completely uncoupled/unreachable */
- destroy_context(cfg, ctxi);
-}
-
-/**
- * _cxlflash_disk_detach() - detaches a LUN from a context
- * @sdev: SCSI device associated with LUN.
- * @ctxi: Context owning resources.
- * @detach: Detach ioctl data structure.
- *
- * As part of the detach, all per-context resources associated with the LUN
- * are cleaned up. When detaching the last LUN for a context, the context
- * itself is cleaned up and released.
- *
- * Return: 0 on success, -errno on failure
- */
-static int _cxlflash_disk_detach(struct scsi_device *sdev,
- struct ctx_info *ctxi,
- struct dk_cxlflash_detach *detach)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct lun_access *lun_access, *t;
- struct dk_cxlflash_release rel;
- bool put_ctx = false;
-
- int i;
- int rc = 0;
- u64 ctxid = DECODE_CTXID(detach->context_id),
- rctxid = detach->context_id;
-
- dev_dbg(dev, "%s: ctxid=%llu\n", __func__, ctxid);
-
- if (!ctxi) {
- ctxi = get_context(cfg, rctxid, lli, CTX_CTRL_ERR_FALLBACK);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%llu\n",
- __func__, ctxid);
- rc = -EINVAL;
- goto out;
- }
-
- put_ctx = true;
- }
-
- /* Cleanup outstanding resources tied to this LUN */
- if (ctxi->rht_out) {
- marshal_det_to_rele(detach, &rel);
- for (i = 0; i < MAX_RHT_PER_CONTEXT; i++) {
- if (ctxi->rht_lun[i] == lli) {
- rel.rsrc_handle = i;
- _cxlflash_disk_release(sdev, ctxi, &rel);
- }
-
- /* No need to loop further if we're done */
- if (ctxi->rht_out == 0)
- break;
- }
- }
-
- /* Take our LUN out of context, free the node */
- list_for_each_entry_safe(lun_access, t, &ctxi->luns, list)
- if (lun_access->lli == lli) {
- list_del(&lun_access->list);
- kfree(lun_access);
- lun_access = NULL;
- break;
- }
-
- /*
- * Release the context reference and the sdev reference that
- * bound this LUN to the context.
- */
- if (kref_put(&ctxi->kref, remove_context))
- put_ctx = false;
- scsi_device_put(sdev);
-out:
- if (put_ctx)
- put_context(ctxi);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-static int cxlflash_disk_detach(struct scsi_device *sdev, void *detach)
-{
- return _cxlflash_disk_detach(sdev, NULL, detach);
-}
-
-/**
- * cxlflash_cxl_release() - release handler for adapter file descriptor
- * @inode: File-system inode associated with fd.
- * @file: File installed with adapter file descriptor.
- *
- * This routine is the release handler for the fops registered with
- * the CXL services on an initial attach for a context. It is called
- * when a close (explicitly by the user or as part of a process tear
- * down) is performed on the adapter file descriptor returned to the
- * user. The user should be aware that explicitly performing a close
- * considered catastrophic and subsequent usage of the superpipe API
- * with previously saved off tokens will fail.
- *
- * This routine derives the context reference and calls detach for
- * each LUN associated with the context.The final detach operation
- * causes the context itself to be freed. With exception to when the
- * CXL process element (context id) lookup fails (a case that should
- * theoretically never occur), every call into this routine results
- * in a complete freeing of a context.
- *
- * Detaching the LUN is typically an ioctl() operation and the underlying
- * code assumes that ioctl_rwsem has been acquired as a reader. To support
- * that design point, the semaphore is acquired and released around detach.
- *
- * Return: 0 on success
- */
-static int cxlflash_cxl_release(struct inode *inode, struct file *file)
-{
- struct cxlflash_cfg *cfg = container_of(file->f_op, struct cxlflash_cfg,
- cxl_fops);
- void *ctx = cfg->ops->fops_get_context(file);
- struct device *dev = &cfg->dev->dev;
- struct ctx_info *ctxi = NULL;
- struct dk_cxlflash_detach detach = { { 0 }, 0 };
- struct lun_access *lun_access, *t;
- enum ctx_ctrl ctrl = CTX_CTRL_ERR_FALLBACK | CTX_CTRL_FILE;
- int ctxid;
-
- ctxid = cfg->ops->process_element(ctx);
- if (unlikely(ctxid < 0)) {
- dev_err(dev, "%s: Context %p was closed ctxid=%d\n",
- __func__, ctx, ctxid);
- goto out;
- }
-
- ctxi = get_context(cfg, ctxid, file, ctrl);
- if (unlikely(!ctxi)) {
- ctxi = get_context(cfg, ctxid, file, ctrl | CTX_CTRL_CLONE);
- if (!ctxi) {
- dev_dbg(dev, "%s: ctxid=%d already free\n",
- __func__, ctxid);
- goto out_release;
- }
-
- dev_dbg(dev, "%s: Another process owns ctxid=%d\n",
- __func__, ctxid);
- put_context(ctxi);
- goto out;
- }
-
- dev_dbg(dev, "%s: close for ctxid=%d\n", __func__, ctxid);
-
- down_read(&cfg->ioctl_rwsem);
- detach.context_id = ctxi->ctxid;
- list_for_each_entry_safe(lun_access, t, &ctxi->luns, list)
- _cxlflash_disk_detach(lun_access->sdev, ctxi, &detach);
- up_read(&cfg->ioctl_rwsem);
-out_release:
- cfg->ops->fd_release(inode, file);
-out:
- dev_dbg(dev, "%s: returning\n", __func__);
- return 0;
-}
-
-/**
- * unmap_context() - clears a previously established mapping
- * @ctxi: Context owning the mapping.
- *
- * This routine is used to switch between the error notification page
- * (dummy page of all 1's) and the real mapping (established by the CXL
- * fault handler).
- */
-static void unmap_context(struct ctx_info *ctxi)
-{
- unmap_mapping_range(ctxi->file->f_mapping, 0, 0, 1);
-}
-
-/**
- * get_err_page() - obtains and allocates the error notification page
- * @cfg: Internal structure associated with the host.
- *
- * Return: error notification page on success, NULL on failure
- */
-static struct page *get_err_page(struct cxlflash_cfg *cfg)
-{
- struct page *err_page = global.err_page;
- struct device *dev = &cfg->dev->dev;
-
- if (unlikely(!err_page)) {
- err_page = alloc_page(GFP_KERNEL);
- if (unlikely(!err_page)) {
- dev_err(dev, "%s: Unable to allocate err_page\n",
- __func__);
- goto out;
- }
-
- memset(page_address(err_page), -1, PAGE_SIZE);
-
- /* Serialize update w/ other threads to avoid a leak */
- mutex_lock(&global.mutex);
- if (likely(!global.err_page))
- global.err_page = err_page;
- else {
- __free_page(err_page);
- err_page = global.err_page;
- }
- mutex_unlock(&global.mutex);
- }
-
-out:
- dev_dbg(dev, "%s: returning err_page=%p\n", __func__, err_page);
- return err_page;
-}
-
-/**
- * cxlflash_mmap_fault() - mmap fault handler for adapter file descriptor
- * @vmf: VM fault associated with current fault.
- *
- * To support error notification via MMIO, faults are 'caught' by this routine
- * that was inserted before passing back the adapter file descriptor on attach.
- * When a fault occurs, this routine evaluates if error recovery is active and
- * if so, installs the error page to 'notify' the user about the error state.
- * During normal operation, the fault is simply handled by the original fault
- * handler that was installed by CXL services as part of initializing the
- * adapter file descriptor. The VMA's page protection bits are toggled to
- * indicate cached/not-cached depending on the memory backing the fault.
- *
- * Return: 0 on success, VM_FAULT_SIGBUS on failure
- */
-static vm_fault_t cxlflash_mmap_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct file *file = vma->vm_file;
- struct cxlflash_cfg *cfg = container_of(file->f_op, struct cxlflash_cfg,
- cxl_fops);
- void *ctx = cfg->ops->fops_get_context(file);
- struct device *dev = &cfg->dev->dev;
- struct ctx_info *ctxi = NULL;
- struct page *err_page = NULL;
- enum ctx_ctrl ctrl = CTX_CTRL_ERR_FALLBACK | CTX_CTRL_FILE;
- vm_fault_t rc = 0;
- int ctxid;
-
- ctxid = cfg->ops->process_element(ctx);
- if (unlikely(ctxid < 0)) {
- dev_err(dev, "%s: Context %p was closed ctxid=%d\n",
- __func__, ctx, ctxid);
- goto err;
- }
-
- ctxi = get_context(cfg, ctxid, file, ctrl);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%d\n", __func__, ctxid);
- goto err;
- }
-
- dev_dbg(dev, "%s: fault for context %d\n", __func__, ctxid);
-
- if (likely(!ctxi->err_recovery_active)) {
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- rc = ctxi->cxl_mmap_vmops->fault(vmf);
- } else {
- dev_dbg(dev, "%s: err recovery active, use err_page\n",
- __func__);
-
- err_page = get_err_page(cfg);
- if (unlikely(!err_page)) {
- dev_err(dev, "%s: Could not get err_page\n", __func__);
- rc = VM_FAULT_RETRY;
- goto out;
- }
-
- get_page(err_page);
- vmf->page = err_page;
- vma->vm_page_prot = pgprot_cached(vma->vm_page_prot);
- }
-
-out:
- if (likely(ctxi))
- put_context(ctxi);
- dev_dbg(dev, "%s: returning rc=%x\n", __func__, rc);
- return rc;
-
-err:
- rc = VM_FAULT_SIGBUS;
- goto out;
-}
-
-/*
- * Local MMAP vmops to 'catch' faults
- */
-static const struct vm_operations_struct cxlflash_mmap_vmops = {
- .fault = cxlflash_mmap_fault,
-};
-
-/**
- * cxlflash_cxl_mmap() - mmap handler for adapter file descriptor
- * @file: File installed with adapter file descriptor.
- * @vma: VM area associated with mapping.
- *
- * Installs local mmap vmops to 'catch' faults for error notification support.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_cxl_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct cxlflash_cfg *cfg = container_of(file->f_op, struct cxlflash_cfg,
- cxl_fops);
- void *ctx = cfg->ops->fops_get_context(file);
- struct device *dev = &cfg->dev->dev;
- struct ctx_info *ctxi = NULL;
- enum ctx_ctrl ctrl = CTX_CTRL_ERR_FALLBACK | CTX_CTRL_FILE;
- int ctxid;
- int rc = 0;
-
- ctxid = cfg->ops->process_element(ctx);
- if (unlikely(ctxid < 0)) {
- dev_err(dev, "%s: Context %p was closed ctxid=%d\n",
- __func__, ctx, ctxid);
- rc = -EIO;
- goto out;
- }
-
- ctxi = get_context(cfg, ctxid, file, ctrl);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%d\n", __func__, ctxid);
- rc = -EIO;
- goto out;
- }
-
- dev_dbg(dev, "%s: mmap for context %d\n", __func__, ctxid);
-
- rc = cfg->ops->fd_mmap(file, vma);
- if (likely(!rc)) {
- /* Insert ourself in the mmap fault handler path */
- ctxi->cxl_mmap_vmops = vma->vm_ops;
- vma->vm_ops = &cxlflash_mmap_vmops;
- }
-
-out:
- if (likely(ctxi))
- put_context(ctxi);
- return rc;
-}
-
-const struct file_operations cxlflash_cxl_fops = {
- .owner = THIS_MODULE,
- .mmap = cxlflash_cxl_mmap,
- .release = cxlflash_cxl_release,
-};
-
-/**
- * cxlflash_mark_contexts_error() - move contexts to error state and list
- * @cfg: Internal structure associated with the host.
- *
- * A context is only moved over to the error list when there are no outstanding
- * references to it. This ensures that a running operation has completed.
- *
- * Return: 0 on success, -errno on failure
- */
-int cxlflash_mark_contexts_error(struct cxlflash_cfg *cfg)
-{
- int i, rc = 0;
- struct ctx_info *ctxi = NULL;
-
- mutex_lock(&cfg->ctx_tbl_list_mutex);
-
- for (i = 0; i < MAX_CONTEXT; i++) {
- ctxi = cfg->ctx_tbl[i];
- if (ctxi) {
- mutex_lock(&ctxi->mutex);
- cfg->ctx_tbl[i] = NULL;
- list_add(&ctxi->list, &cfg->ctx_err_recovery);
- ctxi->err_recovery_active = true;
- ctxi->ctrl_map = NULL;
- unmap_context(ctxi);
- mutex_unlock(&ctxi->mutex);
- }
- }
-
- mutex_unlock(&cfg->ctx_tbl_list_mutex);
- return rc;
-}
-
-/*
- * Dummy NULL fops
- */
-static const struct file_operations null_fops = {
- .owner = THIS_MODULE,
-};
-
-/**
- * check_state() - checks and responds to the current adapter state
- * @cfg: Internal structure associated with the host.
- *
- * This routine can block and should only be used on process context.
- * It assumes that the caller is an ioctl thread and holding the ioctl
- * read semaphore. This is temporarily let up across the wait to allow
- * for draining actively running ioctls. Also note that when waking up
- * from waiting in reset, the state is unknown and must be checked again
- * before proceeding.
- *
- * Return: 0 on success, -errno on failure
- */
-int check_state(struct cxlflash_cfg *cfg)
-{
- struct device *dev = &cfg->dev->dev;
- int rc = 0;
-
-retry:
- switch (cfg->state) {
- case STATE_RESET:
- dev_dbg(dev, "%s: Reset state, going to wait...\n", __func__);
- up_read(&cfg->ioctl_rwsem);
- rc = wait_event_interruptible(cfg->reset_waitq,
- cfg->state != STATE_RESET);
- down_read(&cfg->ioctl_rwsem);
- if (unlikely(rc))
- break;
- goto retry;
- case STATE_FAILTERM:
- dev_dbg(dev, "%s: Failed/Terminating\n", __func__);
- rc = -ENODEV;
- break;
- default:
- break;
- }
-
- return rc;
-}
-
-/**
- * cxlflash_disk_attach() - attach a LUN to a context
- * @sdev: SCSI device associated with LUN.
- * @arg: Attach ioctl data structure.
- *
- * Creates a context and attaches LUN to it. A LUN can only be attached
- * one time to a context (subsequent attaches for the same context/LUN pair
- * are not supported). Additional LUNs can be attached to a context by
- * specifying the 'reuse' flag defined in the cxlflash_ioctl.h header.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_disk_attach(struct scsi_device *sdev, void *arg)
-{
- struct dk_cxlflash_attach *attach = arg;
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct afu *afu = cfg->afu;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct ctx_info *ctxi = NULL;
- struct lun_access *lun_access = NULL;
- int rc = 0;
- u32 perms;
- int ctxid = -1;
- u64 irqs = attach->num_interrupts;
- u64 flags = 0UL;
- u64 rctxid = 0UL;
- struct file *file = NULL;
-
- void *ctx = NULL;
-
- int fd = -1;
-
- if (irqs > 4) {
- dev_dbg(dev, "%s: Cannot support this many interrupts %llu\n",
- __func__, irqs);
- rc = -EINVAL;
- goto out;
- }
-
- if (gli->max_lba == 0) {
- dev_dbg(dev, "%s: No capacity info for LUN=%016llx\n",
- __func__, lli->lun_id[sdev->channel]);
- rc = read_cap16(sdev, lli);
- if (rc) {
- dev_err(dev, "%s: Invalid device rc=%d\n",
- __func__, rc);
- rc = -ENODEV;
- goto out;
- }
- dev_dbg(dev, "%s: LBA = %016llx\n", __func__, gli->max_lba);
- dev_dbg(dev, "%s: BLK_LEN = %08x\n", __func__, gli->blk_len);
- }
-
- if (attach->hdr.flags & DK_CXLFLASH_ATTACH_REUSE_CONTEXT) {
- rctxid = attach->context_id;
- ctxi = get_context(cfg, rctxid, NULL, 0);
- if (!ctxi) {
- dev_dbg(dev, "%s: Bad context rctxid=%016llx\n",
- __func__, rctxid);
- rc = -EINVAL;
- goto out;
- }
-
- list_for_each_entry(lun_access, &ctxi->luns, list)
- if (lun_access->lli == lli) {
- dev_dbg(dev, "%s: Already attached\n",
- __func__);
- rc = -EINVAL;
- goto out;
- }
- }
-
- rc = scsi_device_get(sdev);
- if (unlikely(rc)) {
- dev_err(dev, "%s: Unable to get sdev reference\n", __func__);
- goto out;
- }
-
- lun_access = kzalloc(sizeof(*lun_access), GFP_KERNEL);
- if (unlikely(!lun_access)) {
- dev_err(dev, "%s: Unable to allocate lun_access\n", __func__);
- rc = -ENOMEM;
- goto err;
- }
-
- lun_access->lli = lli;
- lun_access->sdev = sdev;
-
- /* Non-NULL context indicates reuse (another context reference) */
- if (ctxi) {
- dev_dbg(dev, "%s: Reusing context for LUN rctxid=%016llx\n",
- __func__, rctxid);
- kref_get(&ctxi->kref);
- list_add(&lun_access->list, &ctxi->luns);
- goto out_attach;
- }
-
- ctxi = create_context(cfg);
- if (unlikely(!ctxi)) {
- dev_err(dev, "%s: Failed to create context ctxid=%d\n",
- __func__, ctxid);
- rc = -ENOMEM;
- goto err;
- }
-
- ctx = cfg->ops->dev_context_init(cfg->dev, cfg->afu_cookie);
- if (IS_ERR_OR_NULL(ctx)) {
- dev_err(dev, "%s: Could not initialize context %p\n",
- __func__, ctx);
- rc = -ENODEV;
- goto err;
- }
-
- rc = cfg->ops->start_work(ctx, irqs);
- if (unlikely(rc)) {
- dev_dbg(dev, "%s: Could not start context rc=%d\n",
- __func__, rc);
- goto err;
- }
-
- ctxid = cfg->ops->process_element(ctx);
- if (unlikely((ctxid >= MAX_CONTEXT) || (ctxid < 0))) {
- dev_err(dev, "%s: ctxid=%d invalid\n", __func__, ctxid);
- rc = -EPERM;
- goto err;
- }
-
- file = cfg->ops->get_fd(ctx, &cfg->cxl_fops, &fd);
- if (unlikely(fd < 0)) {
- rc = -ENODEV;
- dev_err(dev, "%s: Could not get file descriptor\n", __func__);
- goto err;
- }
-
- /* Translate read/write O_* flags from fcntl.h to AFU permission bits */
- perms = SISL_RHT_PERM(attach->hdr.flags + 1);
-
- /* Context mutex is locked upon return */
- init_context(ctxi, cfg, ctx, ctxid, file, perms, irqs);
-
- rc = afu_attach(cfg, ctxi);
- if (unlikely(rc)) {
- dev_err(dev, "%s: Could not attach AFU rc %d\n", __func__, rc);
- goto err;
- }
-
- /*
- * No error paths after this point. Once the fd is installed it's
- * visible to user space and can't be undone safely on this thread.
- * There is no need to worry about a deadlock here because no one
- * knows about us yet; we can be the only one holding our mutex.
- */
- list_add(&lun_access->list, &ctxi->luns);
- mutex_lock(&cfg->ctx_tbl_list_mutex);
- mutex_lock(&ctxi->mutex);
- cfg->ctx_tbl[ctxid] = ctxi;
- mutex_unlock(&cfg->ctx_tbl_list_mutex);
- fd_install(fd, file);
-
-out_attach:
- if (fd != -1)
- flags |= DK_CXLFLASH_APP_CLOSE_ADAP_FD;
- if (afu_is_sq_cmd_mode(afu))
- flags |= DK_CXLFLASH_CONTEXT_SQ_CMD_MODE;
-
- attach->hdr.return_flags = flags;
- attach->context_id = ctxi->ctxid;
- attach->block_size = gli->blk_len;
- attach->mmio_size = sizeof(afu->afu_map->hosts[0].harea);
- attach->last_lba = gli->max_lba;
- attach->max_xfer = sdev->host->max_sectors * MAX_SECTOR_UNIT;
- attach->max_xfer /= gli->blk_len;
-
-out:
- attach->adap_fd = fd;
-
- if (ctxi)
- put_context(ctxi);
-
- dev_dbg(dev, "%s: returning ctxid=%d fd=%d bs=%lld rc=%d llba=%lld\n",
- __func__, ctxid, fd, attach->block_size, rc, attach->last_lba);
- return rc;
-
-err:
- /* Cleanup CXL context; okay to 'stop' even if it was not started */
- if (!IS_ERR_OR_NULL(ctx)) {
- cfg->ops->stop_context(ctx);
- cfg->ops->release_context(ctx);
- ctx = NULL;
- }
-
- /*
- * Here, we're overriding the fops with a dummy all-NULL fops because
- * fput() calls the release fop, which will cause us to mistakenly
- * call into the CXL code. Rather than try to add yet more complexity
- * to that routine (cxlflash_cxl_release) we should try to fix the
- * issue here.
- */
- if (fd > 0) {
- file->f_op = &null_fops;
- fput(file);
- put_unused_fd(fd);
- fd = -1;
- file = NULL;
- }
-
- /* Cleanup our context */
- if (ctxi) {
- destroy_context(cfg, ctxi);
- ctxi = NULL;
- }
-
- kfree(lun_access);
- scsi_device_put(sdev);
- goto out;
-}
-
-/**
- * recover_context() - recovers a context in error
- * @cfg: Internal structure associated with the host.
- * @ctxi: Context to release.
- * @adap_fd: Adapter file descriptor associated with new/recovered context.
- *
- * Restablishes the state for a context-in-error.
- *
- * Return: 0 on success, -errno on failure
- */
-static int recover_context(struct cxlflash_cfg *cfg,
- struct ctx_info *ctxi,
- int *adap_fd)
-{
- struct device *dev = &cfg->dev->dev;
- int rc = 0;
- int fd = -1;
- int ctxid = -1;
- struct file *file;
- void *ctx;
- struct afu *afu = cfg->afu;
-
- ctx = cfg->ops->dev_context_init(cfg->dev, cfg->afu_cookie);
- if (IS_ERR_OR_NULL(ctx)) {
- dev_err(dev, "%s: Could not initialize context %p\n",
- __func__, ctx);
- rc = -ENODEV;
- goto out;
- }
-
- rc = cfg->ops->start_work(ctx, ctxi->irqs);
- if (unlikely(rc)) {
- dev_dbg(dev, "%s: Could not start context rc=%d\n",
- __func__, rc);
- goto err1;
- }
-
- ctxid = cfg->ops->process_element(ctx);
- if (unlikely((ctxid >= MAX_CONTEXT) || (ctxid < 0))) {
- dev_err(dev, "%s: ctxid=%d invalid\n", __func__, ctxid);
- rc = -EPERM;
- goto err2;
- }
-
- file = cfg->ops->get_fd(ctx, &cfg->cxl_fops, &fd);
- if (unlikely(fd < 0)) {
- rc = -ENODEV;
- dev_err(dev, "%s: Could not get file descriptor\n", __func__);
- goto err2;
- }
-
- /* Update with new MMIO area based on updated context id */
- ctxi->ctrl_map = &afu->afu_map->ctrls[ctxid].ctrl;
-
- rc = afu_attach(cfg, ctxi);
- if (rc) {
- dev_err(dev, "%s: Could not attach AFU rc %d\n", __func__, rc);
- goto err3;
- }
-
- /*
- * No error paths after this point. Once the fd is installed it's
- * visible to user space and can't be undone safely on this thread.
- */
- ctxi->ctxid = ENCODE_CTXID(ctxi, ctxid);
- ctxi->ctx = ctx;
- ctxi->file = file;
-
- /*
- * Put context back in table (note the reinit of the context list);
- * we must first drop the context's mutex and then acquire it in
- * order with the table/list mutex to avoid a deadlock - safe to do
- * here because no one can find us at this moment in time.
- */
- mutex_unlock(&ctxi->mutex);
- mutex_lock(&cfg->ctx_tbl_list_mutex);
- mutex_lock(&ctxi->mutex);
- list_del_init(&ctxi->list);
- cfg->ctx_tbl[ctxid] = ctxi;
- mutex_unlock(&cfg->ctx_tbl_list_mutex);
- fd_install(fd, file);
- *adap_fd = fd;
-out:
- dev_dbg(dev, "%s: returning ctxid=%d fd=%d rc=%d\n",
- __func__, ctxid, fd, rc);
- return rc;
-
-err3:
- fput(file);
- put_unused_fd(fd);
-err2:
- cfg->ops->stop_context(ctx);
-err1:
- cfg->ops->release_context(ctx);
- goto out;
-}
-
-/**
- * cxlflash_afu_recover() - initiates AFU recovery
- * @sdev: SCSI device associated with LUN.
- * @arg: Recover ioctl data structure.
- *
- * Only a single recovery is allowed at a time to avoid exhausting CXL
- * resources (leading to recovery failure) in the event that we're up
- * against the maximum number of contexts limit. For similar reasons,
- * a context recovery is retried if there are multiple recoveries taking
- * place at the same time and the failure was due to CXL services being
- * unable to keep up.
- *
- * As this routine is called on ioctl context, it holds the ioctl r/w
- * semaphore that is used to drain ioctls in recovery scenarios. The
- * implementation to achieve the pacing described above (a local mutex)
- * requires that the ioctl r/w semaphore be dropped and reacquired to
- * avoid a 3-way deadlock when multiple process recoveries operate in
- * parallel.
- *
- * Because a user can detect an error condition before the kernel, it is
- * quite possible for this routine to act as the kernel's EEH detection
- * source (MMIO read of mbox_r). Because of this, there is a window of
- * time where an EEH might have been detected but not yet 'serviced'
- * (callback invoked, causing the device to enter reset state). To avoid
- * looping in this routine during that window, a 1 second sleep is in place
- * between the time the MMIO failure is detected and the time a wait on the
- * reset wait queue is attempted via check_state().
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_afu_recover(struct scsi_device *sdev, void *arg)
-{
- struct dk_cxlflash_recover_afu *recover = arg;
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct afu *afu = cfg->afu;
- struct ctx_info *ctxi = NULL;
- struct mutex *mutex = &cfg->ctx_recovery_mutex;
- struct hwq *hwq = get_hwq(afu, PRIMARY_HWQ);
- u64 flags;
- u64 ctxid = DECODE_CTXID(recover->context_id),
- rctxid = recover->context_id;
- long reg;
- bool locked = true;
- int lretry = 20; /* up to 2 seconds */
- int new_adap_fd = -1;
- int rc = 0;
-
- atomic_inc(&cfg->recovery_threads);
- up_read(&cfg->ioctl_rwsem);
- rc = mutex_lock_interruptible(mutex);
- down_read(&cfg->ioctl_rwsem);
- if (rc) {
- locked = false;
- goto out;
- }
-
- rc = check_state(cfg);
- if (rc) {
- dev_err(dev, "%s: Failed state rc=%d\n", __func__, rc);
- rc = -ENODEV;
- goto out;
- }
-
- dev_dbg(dev, "%s: reason=%016llx rctxid=%016llx\n",
- __func__, recover->reason, rctxid);
-
-retry:
- /* Ensure that this process is attached to the context */
- ctxi = get_context(cfg, rctxid, lli, CTX_CTRL_ERR_FALLBACK);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%llu\n", __func__, ctxid);
- rc = -EINVAL;
- goto out;
- }
-
- if (ctxi->err_recovery_active) {
-retry_recover:
- rc = recover_context(cfg, ctxi, &new_adap_fd);
- if (unlikely(rc)) {
- dev_err(dev, "%s: Recovery failed ctxid=%llu rc=%d\n",
- __func__, ctxid, rc);
- if ((rc == -ENODEV) &&
- ((atomic_read(&cfg->recovery_threads) > 1) ||
- (lretry--))) {
- dev_dbg(dev, "%s: Going to try again\n",
- __func__);
- mutex_unlock(mutex);
- msleep(100);
- rc = mutex_lock_interruptible(mutex);
- if (rc) {
- locked = false;
- goto out;
- }
- goto retry_recover;
- }
-
- goto out;
- }
-
- ctxi->err_recovery_active = false;
-
- flags = DK_CXLFLASH_APP_CLOSE_ADAP_FD |
- DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET;
- if (afu_is_sq_cmd_mode(afu))
- flags |= DK_CXLFLASH_CONTEXT_SQ_CMD_MODE;
-
- recover->hdr.return_flags = flags;
- recover->context_id = ctxi->ctxid;
- recover->adap_fd = new_adap_fd;
- recover->mmio_size = sizeof(afu->afu_map->hosts[0].harea);
- goto out;
- }
-
- /* Test if in error state */
- reg = readq_be(&hwq->ctrl_map->mbox_r);
- if (reg == -1) {
- dev_dbg(dev, "%s: MMIO fail, wait for recovery.\n", __func__);
-
- /*
- * Before checking the state, put back the context obtained with
- * get_context() as it is no longer needed and sleep for a short
- * period of time (see prolog notes).
- */
- put_context(ctxi);
- ctxi = NULL;
- ssleep(1);
- rc = check_state(cfg);
- if (unlikely(rc))
- goto out;
- goto retry;
- }
-
- dev_dbg(dev, "%s: MMIO working, no recovery required\n", __func__);
-out:
- if (likely(ctxi))
- put_context(ctxi);
- if (locked)
- mutex_unlock(mutex);
- atomic_dec_if_positive(&cfg->recovery_threads);
- return rc;
-}
-
-/**
- * process_sense() - evaluates and processes sense data
- * @sdev: SCSI device associated with LUN.
- * @verify: Verify ioctl data structure.
- *
- * Return: 0 on success, -errno on failure
- */
-static int process_sense(struct scsi_device *sdev,
- struct dk_cxlflash_verify *verify)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- u64 prev_lba = gli->max_lba;
- struct scsi_sense_hdr sshdr = { 0 };
- int rc = 0;
-
- rc = scsi_normalize_sense((const u8 *)&verify->sense_data,
- DK_CXLFLASH_VERIFY_SENSE_LEN, &sshdr);
- if (!rc) {
- dev_err(dev, "%s: Failed to normalize sense data\n", __func__);
- rc = -EINVAL;
- goto out;
- }
-
- switch (sshdr.sense_key) {
- case NO_SENSE:
- case RECOVERED_ERROR:
- case NOT_READY:
- break;
- case UNIT_ATTENTION:
- switch (sshdr.asc) {
- case 0x29: /* Power on Reset or Device Reset */
- fallthrough;
- case 0x2A: /* Device settings/capacity changed */
- rc = read_cap16(sdev, lli);
- if (rc) {
- rc = -ENODEV;
- break;
- }
- if (prev_lba != gli->max_lba)
- dev_dbg(dev, "%s: Capacity changed old=%lld "
- "new=%lld\n", __func__, prev_lba,
- gli->max_lba);
- break;
- case 0x3F: /* Report LUNs changed, Rescan. */
- scsi_scan_host(cfg->host);
- break;
- default:
- rc = -EIO;
- break;
- }
- break;
- default:
- rc = -EIO;
- break;
- }
-out:
- dev_dbg(dev, "%s: sense_key %x asc %x ascq %x rc %d\n", __func__,
- sshdr.sense_key, sshdr.asc, sshdr.ascq, rc);
- return rc;
-}
-
-/**
- * cxlflash_disk_verify() - verifies a LUN is the same and handle size changes
- * @sdev: SCSI device associated with LUN.
- * @arg: Verify ioctl data structure.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_disk_verify(struct scsi_device *sdev, void *arg)
-{
- struct dk_cxlflash_verify *verify = arg;
- int rc = 0;
- struct ctx_info *ctxi = NULL;
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct sisl_rht_entry *rhte = NULL;
- res_hndl_t rhndl = verify->rsrc_handle;
- u64 ctxid = DECODE_CTXID(verify->context_id),
- rctxid = verify->context_id;
- u64 last_lba = 0;
-
- dev_dbg(dev, "%s: ctxid=%llu rhndl=%016llx, hint=%016llx, "
- "flags=%016llx\n", __func__, ctxid, verify->rsrc_handle,
- verify->hint, verify->hdr.flags);
-
- ctxi = get_context(cfg, rctxid, lli, 0);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%llu\n", __func__, ctxid);
- rc = -EINVAL;
- goto out;
- }
-
- rhte = get_rhte(ctxi, rhndl, lli);
- if (unlikely(!rhte)) {
- dev_dbg(dev, "%s: Bad resource handle rhndl=%d\n",
- __func__, rhndl);
- rc = -EINVAL;
- goto out;
- }
-
- /*
- * Look at the hint/sense to see if it requires us to redrive
- * inquiry (i.e. the Unit attention is due to the WWN changing).
- */
- if (verify->hint & DK_CXLFLASH_VERIFY_HINT_SENSE) {
- /* Can't hold mutex across process_sense/read_cap16,
- * since we could have an intervening EEH event.
- */
- ctxi->unavail = true;
- mutex_unlock(&ctxi->mutex);
- rc = process_sense(sdev, verify);
- if (unlikely(rc)) {
- dev_err(dev, "%s: Failed to validate sense data (%d)\n",
- __func__, rc);
- mutex_lock(&ctxi->mutex);
- ctxi->unavail = false;
- goto out;
- }
- mutex_lock(&ctxi->mutex);
- ctxi->unavail = false;
- }
-
- switch (gli->mode) {
- case MODE_PHYSICAL:
- last_lba = gli->max_lba;
- break;
- case MODE_VIRTUAL:
- /* Cast lxt_cnt to u64 for multiply to be treated as 64bit op */
- last_lba = ((u64)rhte->lxt_cnt * MC_CHUNK_SIZE * gli->blk_len);
- last_lba /= CXLFLASH_BLOCK_SIZE;
- last_lba--;
- break;
- default:
- WARN(1, "Unsupported LUN mode!");
- }
-
- verify->last_lba = last_lba;
-
-out:
- if (likely(ctxi))
- put_context(ctxi);
- dev_dbg(dev, "%s: returning rc=%d llba=%llx\n",
- __func__, rc, verify->last_lba);
- return rc;
-}
-
-/**
- * decode_ioctl() - translates an encoded ioctl to an easily identifiable string
- * @cmd: The ioctl command to decode.
- *
- * Return: A string identifying the decoded ioctl.
- */
-static char *decode_ioctl(unsigned int cmd)
-{
- switch (cmd) {
- case DK_CXLFLASH_ATTACH:
- return __stringify_1(DK_CXLFLASH_ATTACH);
- case DK_CXLFLASH_USER_DIRECT:
- return __stringify_1(DK_CXLFLASH_USER_DIRECT);
- case DK_CXLFLASH_USER_VIRTUAL:
- return __stringify_1(DK_CXLFLASH_USER_VIRTUAL);
- case DK_CXLFLASH_VLUN_RESIZE:
- return __stringify_1(DK_CXLFLASH_VLUN_RESIZE);
- case DK_CXLFLASH_RELEASE:
- return __stringify_1(DK_CXLFLASH_RELEASE);
- case DK_CXLFLASH_DETACH:
- return __stringify_1(DK_CXLFLASH_DETACH);
- case DK_CXLFLASH_VERIFY:
- return __stringify_1(DK_CXLFLASH_VERIFY);
- case DK_CXLFLASH_VLUN_CLONE:
- return __stringify_1(DK_CXLFLASH_VLUN_CLONE);
- case DK_CXLFLASH_RECOVER_AFU:
- return __stringify_1(DK_CXLFLASH_RECOVER_AFU);
- case DK_CXLFLASH_MANAGE_LUN:
- return __stringify_1(DK_CXLFLASH_MANAGE_LUN);
- }
-
- return "UNKNOWN";
-}
-
-/**
- * cxlflash_disk_direct_open() - opens a direct (physical) disk
- * @sdev: SCSI device associated with LUN.
- * @arg: UDirect ioctl data structure.
- *
- * On successful return, the user is informed of the resource handle
- * to be used to identify the direct lun and the size (in blocks) of
- * the direct lun in last LBA format.
- *
- * Return: 0 on success, -errno on failure
- */
-static int cxlflash_disk_direct_open(struct scsi_device *sdev, void *arg)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct afu *afu = cfg->afu;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct dk_cxlflash_release rel = { { 0 }, 0 };
-
- struct dk_cxlflash_udirect *pphys = (struct dk_cxlflash_udirect *)arg;
-
- u64 ctxid = DECODE_CTXID(pphys->context_id),
- rctxid = pphys->context_id;
- u64 lun_size = 0;
- u64 last_lba = 0;
- u64 rsrc_handle = -1;
- u32 port = CHAN2PORTMASK(sdev->channel);
-
- int rc = 0;
-
- struct ctx_info *ctxi = NULL;
- struct sisl_rht_entry *rhte = NULL;
-
- dev_dbg(dev, "%s: ctxid=%llu ls=%llu\n", __func__, ctxid, lun_size);
-
- rc = cxlflash_lun_attach(gli, MODE_PHYSICAL, false);
- if (unlikely(rc)) {
- dev_dbg(dev, "%s: Failed attach to LUN (PHYSICAL)\n", __func__);
- goto out;
- }
-
- ctxi = get_context(cfg, rctxid, lli, 0);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%llu\n", __func__, ctxid);
- rc = -EINVAL;
- goto err1;
- }
-
- rhte = rhte_checkout(ctxi, lli);
- if (unlikely(!rhte)) {
- dev_dbg(dev, "%s: Too many opens ctxid=%lld\n",
- __func__, ctxid);
- rc = -EMFILE; /* too many opens */
- goto err1;
- }
-
- rsrc_handle = (rhte - ctxi->rht_start);
-
- rht_format1(rhte, lli->lun_id[sdev->channel], ctxi->rht_perms, port);
-
- last_lba = gli->max_lba;
- pphys->hdr.return_flags = 0;
- pphys->last_lba = last_lba;
- pphys->rsrc_handle = rsrc_handle;
-
- rc = cxlflash_afu_sync(afu, ctxid, rsrc_handle, AFU_LW_SYNC);
- if (unlikely(rc)) {
- dev_dbg(dev, "%s: AFU sync failed rc=%d\n", __func__, rc);
- goto err2;
- }
-
-out:
- if (likely(ctxi))
- put_context(ctxi);
- dev_dbg(dev, "%s: returning handle=%llu rc=%d llba=%llu\n",
- __func__, rsrc_handle, rc, last_lba);
- return rc;
-
-err2:
- marshal_udir_to_rele(pphys, &rel);
- _cxlflash_disk_release(sdev, ctxi, &rel);
- goto out;
-err1:
- cxlflash_lun_detach(gli);
- goto out;
-}
-
-/**
- * ioctl_common() - common IOCTL handler for driver
- * @sdev: SCSI device associated with LUN.
- * @cmd: IOCTL command.
- *
- * Handles common fencing operations that are valid for multiple ioctls. Always
- * allow through ioctls that are cleanup oriented in nature, even when operating
- * in a failed/terminating state.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ioctl_common(struct scsi_device *sdev, unsigned int cmd)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- int rc = 0;
-
- if (unlikely(!lli)) {
- dev_dbg(dev, "%s: Unknown LUN\n", __func__);
- rc = -EINVAL;
- goto out;
- }
-
- rc = check_state(cfg);
- if (unlikely(rc) && (cfg->state == STATE_FAILTERM)) {
- switch (cmd) {
- case DK_CXLFLASH_VLUN_RESIZE:
- case DK_CXLFLASH_RELEASE:
- case DK_CXLFLASH_DETACH:
- dev_dbg(dev, "%s: Command override rc=%d\n",
- __func__, rc);
- rc = 0;
- break;
- }
- }
-out:
- return rc;
-}
-
-/**
- * cxlflash_ioctl() - IOCTL handler for driver
- * @sdev: SCSI device associated with LUN.
- * @cmd: IOCTL command.
- * @arg: Userspace ioctl data structure.
- *
- * A read/write semaphore is used to implement a 'drain' of currently
- * running ioctls. The read semaphore is taken at the beginning of each
- * ioctl thread and released upon concluding execution. Additionally the
- * semaphore should be released and then reacquired in any ioctl execution
- * path which will wait for an event to occur that is outside the scope of
- * the ioctl (i.e. an adapter reset). To drain the ioctls currently running,
- * a thread simply needs to acquire the write semaphore.
- *
- * Return: 0 on success, -errno on failure
- */
-int cxlflash_ioctl(struct scsi_device *sdev, unsigned int cmd, void __user *arg)
-{
- typedef int (*sioctl) (struct scsi_device *, void *);
-
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct afu *afu = cfg->afu;
- struct dk_cxlflash_hdr *hdr;
- char buf[sizeof(union cxlflash_ioctls)];
- size_t size = 0;
- bool known_ioctl = false;
- int idx;
- int rc = 0;
- struct Scsi_Host *shost = sdev->host;
- sioctl do_ioctl = NULL;
-
- static const struct {
- size_t size;
- sioctl ioctl;
- } ioctl_tbl[] = { /* NOTE: order matters here */
- {sizeof(struct dk_cxlflash_attach), cxlflash_disk_attach},
- {sizeof(struct dk_cxlflash_udirect), cxlflash_disk_direct_open},
- {sizeof(struct dk_cxlflash_release), cxlflash_disk_release},
- {sizeof(struct dk_cxlflash_detach), cxlflash_disk_detach},
- {sizeof(struct dk_cxlflash_verify), cxlflash_disk_verify},
- {sizeof(struct dk_cxlflash_recover_afu), cxlflash_afu_recover},
- {sizeof(struct dk_cxlflash_manage_lun), cxlflash_manage_lun},
- {sizeof(struct dk_cxlflash_uvirtual), cxlflash_disk_virtual_open},
- {sizeof(struct dk_cxlflash_resize), cxlflash_vlun_resize},
- {sizeof(struct dk_cxlflash_clone), cxlflash_disk_clone},
- };
-
- /* Hold read semaphore so we can drain if needed */
- down_read(&cfg->ioctl_rwsem);
-
- /* Restrict command set to physical support only for internal LUN */
- if (afu->internal_lun)
- switch (cmd) {
- case DK_CXLFLASH_RELEASE:
- case DK_CXLFLASH_USER_VIRTUAL:
- case DK_CXLFLASH_VLUN_RESIZE:
- case DK_CXLFLASH_VLUN_CLONE:
- dev_dbg(dev, "%s: %s not supported for lun_mode=%d\n",
- __func__, decode_ioctl(cmd), afu->internal_lun);
- rc = -EINVAL;
- goto cxlflash_ioctl_exit;
- }
-
- switch (cmd) {
- case DK_CXLFLASH_ATTACH:
- case DK_CXLFLASH_USER_DIRECT:
- case DK_CXLFLASH_RELEASE:
- case DK_CXLFLASH_DETACH:
- case DK_CXLFLASH_VERIFY:
- case DK_CXLFLASH_RECOVER_AFU:
- case DK_CXLFLASH_USER_VIRTUAL:
- case DK_CXLFLASH_VLUN_RESIZE:
- case DK_CXLFLASH_VLUN_CLONE:
- dev_dbg(dev, "%s: %s (%08X) on dev(%d/%d/%d/%llu)\n",
- __func__, decode_ioctl(cmd), cmd, shost->host_no,
- sdev->channel, sdev->id, sdev->lun);
- rc = ioctl_common(sdev, cmd);
- if (unlikely(rc))
- goto cxlflash_ioctl_exit;
-
- fallthrough;
-
- case DK_CXLFLASH_MANAGE_LUN:
- known_ioctl = true;
- idx = _IOC_NR(cmd) - _IOC_NR(DK_CXLFLASH_ATTACH);
- size = ioctl_tbl[idx].size;
- do_ioctl = ioctl_tbl[idx].ioctl;
-
- if (likely(do_ioctl))
- break;
-
- fallthrough;
- default:
- rc = -EINVAL;
- goto cxlflash_ioctl_exit;
- }
-
- if (unlikely(copy_from_user(&buf, arg, size))) {
- dev_err(dev, "%s: copy_from_user() fail size=%lu cmd=%u (%s) arg=%p\n",
- __func__, size, cmd, decode_ioctl(cmd), arg);
- rc = -EFAULT;
- goto cxlflash_ioctl_exit;
- }
-
- hdr = (struct dk_cxlflash_hdr *)&buf;
- if (hdr->version != DK_CXLFLASH_VERSION_0) {
- dev_dbg(dev, "%s: Version %u not supported for %s\n",
- __func__, hdr->version, decode_ioctl(cmd));
- rc = -EINVAL;
- goto cxlflash_ioctl_exit;
- }
-
- if (hdr->rsvd[0] || hdr->rsvd[1] || hdr->rsvd[2] || hdr->return_flags) {
- dev_dbg(dev, "%s: Reserved/rflags populated\n", __func__);
- rc = -EINVAL;
- goto cxlflash_ioctl_exit;
- }
-
- rc = do_ioctl(sdev, (void *)&buf);
- if (likely(!rc))
- if (unlikely(copy_to_user(arg, &buf, size))) {
- dev_err(dev, "%s: copy_to_user() fail size=%lu cmd=%u (%s) arg=%p\n",
- __func__, size, cmd, decode_ioctl(cmd), arg);
- rc = -EFAULT;
- }
-
- /* fall through to exit */
-
-cxlflash_ioctl_exit:
- up_read(&cfg->ioctl_rwsem);
- if (unlikely(rc && known_ioctl))
- dev_err(dev, "%s: ioctl %s (%08X) on dev(%d/%d/%d/%llu) "
- "returned rc %d\n", __func__,
- decode_ioctl(cmd), cmd, shost->host_no,
- sdev->channel, sdev->id, sdev->lun, rc);
- else
- dev_dbg(dev, "%s: ioctl %s (%08X) on dev(%d/%d/%d/%llu) "
- "returned rc %d\n", __func__, decode_ioctl(cmd),
- cmd, shost->host_no, sdev->channel, sdev->id,
- sdev->lun, rc);
- return rc;
-}
diff --git a/drivers/scsi/cxlflash/superpipe.h b/drivers/scsi/cxlflash/superpipe.h
deleted file mode 100644
index fe8c975d13d7..000000000000
--- a/drivers/scsi/cxlflash/superpipe.h
+++ /dev/null
@@ -1,150 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#ifndef _CXLFLASH_SUPERPIPE_H
-#define _CXLFLASH_SUPERPIPE_H
-
-extern struct cxlflash_global global;
-
-/*
- * Terminology: use afu (and not adapter) to refer to the HW.
- * Adapter is the entire slot and includes PSL out of which
- * only the AFU is visible to user space.
- */
-
-/* Chunk size parms: note sislite minimum chunk size is
- * 0x10000 LBAs corresponding to a NMASK or 16.
- */
-#define MC_CHUNK_SIZE (1 << MC_RHT_NMASK) /* in LBAs */
-
-#define CMD_TIMEOUT 30 /* 30 secs */
-#define CMD_RETRIES 5 /* 5 retries for scsi_execute */
-
-#define MAX_SECTOR_UNIT 512 /* max_sector is in 512 byte multiples */
-
-enum lun_mode {
- MODE_NONE = 0,
- MODE_VIRTUAL,
- MODE_PHYSICAL
-};
-
-/* Global (entire driver, spans adapters) lun_info structure */
-struct glun_info {
- u64 max_lba; /* from read cap(16) */
- u32 blk_len; /* from read cap(16) */
- enum lun_mode mode; /* NONE, VIRTUAL, PHYSICAL */
- int users; /* Number of users w/ references to LUN */
-
- u8 wwid[16];
-
- struct mutex mutex;
-
- struct blka blka;
- struct list_head list;
-};
-
-/* Local (per-adapter) lun_info structure */
-struct llun_info {
- u64 lun_id[MAX_FC_PORTS]; /* from REPORT_LUNS */
- u32 lun_index; /* Index in the LUN table */
- u32 host_no; /* host_no from Scsi_host */
- u32 port_sel; /* What port to use for this LUN */
- bool in_table; /* Whether a LUN table entry was created */
-
- u8 wwid[16]; /* Keep a duplicate copy here? */
-
- struct glun_info *parent; /* Pointer to entry in global LUN structure */
- struct scsi_device *sdev;
- struct list_head list;
-};
-
-struct lun_access {
- struct llun_info *lli;
- struct scsi_device *sdev;
- struct list_head list;
-};
-
-enum ctx_ctrl {
- CTX_CTRL_CLONE = (1 << 1),
- CTX_CTRL_ERR = (1 << 2),
- CTX_CTRL_ERR_FALLBACK = (1 << 3),
- CTX_CTRL_NOPID = (1 << 4),
- CTX_CTRL_FILE = (1 << 5)
-};
-
-#define ENCODE_CTXID(_ctx, _id) (((((u64)_ctx) & 0xFFFFFFFF0ULL) << 28) | _id)
-#define DECODE_CTXID(_val) (_val & 0xFFFFFFFF)
-
-struct ctx_info {
- struct sisl_ctrl_map __iomem *ctrl_map; /* initialized at startup */
- struct sisl_rht_entry *rht_start; /* 1 page (req'd for alignment),
- * alloc/free on attach/detach
- */
- u32 rht_out; /* Number of checked out RHT entries */
- u32 rht_perms; /* User-defined permissions for RHT entries */
- struct llun_info **rht_lun; /* Mapping of RHT entries to LUNs */
- u8 *rht_needs_ws; /* User-desired write-same function per RHTE */
-
- u64 ctxid;
- u64 irqs; /* Number of interrupts requested for context */
- pid_t pid;
- bool initialized;
- bool unavail;
- bool err_recovery_active;
- struct mutex mutex; /* Context protection */
- struct kref kref;
- void *ctx;
- struct cxlflash_cfg *cfg;
- struct list_head luns; /* LUNs attached to this context */
- const struct vm_operations_struct *cxl_mmap_vmops;
- struct file *file;
- struct list_head list; /* Link contexts in error recovery */
-};
-
-struct cxlflash_global {
- struct mutex mutex;
- struct list_head gluns;/* list of glun_info structs */
- struct page *err_page; /* One page of all 0xF for error notification */
-};
-
-int cxlflash_vlun_resize(struct scsi_device *sdev, void *resize);
-int _cxlflash_vlun_resize(struct scsi_device *sdev, struct ctx_info *ctxi,
- struct dk_cxlflash_resize *resize);
-
-int cxlflash_disk_release(struct scsi_device *sdev,
- void *release);
-int _cxlflash_disk_release(struct scsi_device *sdev, struct ctx_info *ctxi,
- struct dk_cxlflash_release *release);
-
-int cxlflash_disk_clone(struct scsi_device *sdev, void *arg);
-
-int cxlflash_disk_virtual_open(struct scsi_device *sdev, void *arg);
-
-int cxlflash_lun_attach(struct glun_info *gli, enum lun_mode mode, bool locked);
-void cxlflash_lun_detach(struct glun_info *gli);
-
-struct ctx_info *get_context(struct cxlflash_cfg *cfg, u64 rctxit, void *arg,
- enum ctx_ctrl ctrl);
-void put_context(struct ctx_info *ctxi);
-
-struct sisl_rht_entry *get_rhte(struct ctx_info *ctxi, res_hndl_t rhndl,
- struct llun_info *lli);
-
-struct sisl_rht_entry *rhte_checkout(struct ctx_info *ctxi,
- struct llun_info *lli);
-void rhte_checkin(struct ctx_info *ctxi, struct sisl_rht_entry *rhte);
-
-void cxlflash_ba_terminate(struct ba_lun *ba_lun);
-
-int cxlflash_manage_lun(struct scsi_device *sdev, void *manage);
-
-int check_state(struct cxlflash_cfg *cfg);
-
-#endif /* ifndef _CXLFLASH_SUPERPIPE_H */
diff --git a/drivers/scsi/cxlflash/vlun.c b/drivers/scsi/cxlflash/vlun.c
deleted file mode 100644
index 32e807703377..000000000000
--- a/drivers/scsi/cxlflash/vlun.c
+++ /dev/null
@@ -1,1336 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/syscalls.h>
-#include <linux/unaligned.h>
-#include <asm/bitsperlong.h>
-
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_host.h>
-#include <uapi/scsi/cxlflash_ioctl.h>
-
-#include "sislite.h"
-#include "common.h"
-#include "vlun.h"
-#include "superpipe.h"
-
-/**
- * marshal_virt_to_resize() - translate uvirtual to resize structure
- * @virt: Source structure from which to translate/copy.
- * @resize: Destination structure for the translate/copy.
- */
-static void marshal_virt_to_resize(struct dk_cxlflash_uvirtual *virt,
- struct dk_cxlflash_resize *resize)
-{
- resize->hdr = virt->hdr;
- resize->context_id = virt->context_id;
- resize->rsrc_handle = virt->rsrc_handle;
- resize->req_size = virt->lun_size;
- resize->last_lba = virt->last_lba;
-}
-
-/**
- * marshal_clone_to_rele() - translate clone to release structure
- * @clone: Source structure from which to translate/copy.
- * @release: Destination structure for the translate/copy.
- */
-static void marshal_clone_to_rele(struct dk_cxlflash_clone *clone,
- struct dk_cxlflash_release *release)
-{
- release->hdr = clone->hdr;
- release->context_id = clone->context_id_dst;
-}
-
-/**
- * ba_init() - initializes a block allocator
- * @ba_lun: Block allocator to initialize.
- *
- * Return: 0 on success, -errno on failure
- */
-static int ba_init(struct ba_lun *ba_lun)
-{
- struct ba_lun_info *bali = NULL;
- int lun_size_au = 0, i = 0;
- int last_word_underflow = 0;
- u64 *lam;
-
- pr_debug("%s: Initializing LUN: lun_id=%016llx "
- "ba_lun->lsize=%lx ba_lun->au_size=%lX\n",
- __func__, ba_lun->lun_id, ba_lun->lsize, ba_lun->au_size);
-
- /* Calculate bit map size */
- lun_size_au = ba_lun->lsize / ba_lun->au_size;
- if (lun_size_au == 0) {
- pr_debug("%s: Requested LUN size of 0!\n", __func__);
- return -EINVAL;
- }
-
- /* Allocate lun information container */
- bali = kzalloc(sizeof(struct ba_lun_info), GFP_KERNEL);
- if (unlikely(!bali)) {
- pr_err("%s: Failed to allocate lun_info lun_id=%016llx\n",
- __func__, ba_lun->lun_id);
- return -ENOMEM;
- }
-
- bali->total_aus = lun_size_au;
- bali->lun_bmap_size = lun_size_au / BITS_PER_LONG;
-
- if (lun_size_au % BITS_PER_LONG)
- bali->lun_bmap_size++;
-
- /* Allocate bitmap space */
- bali->lun_alloc_map = kzalloc((bali->lun_bmap_size * sizeof(u64)),
- GFP_KERNEL);
- if (unlikely(!bali->lun_alloc_map)) {
- pr_err("%s: Failed to allocate lun allocation map: "
- "lun_id=%016llx\n", __func__, ba_lun->lun_id);
- kfree(bali);
- return -ENOMEM;
- }
-
- /* Initialize the bit map size and set all bits to '1' */
- bali->free_aun_cnt = lun_size_au;
-
- for (i = 0; i < bali->lun_bmap_size; i++)
- bali->lun_alloc_map[i] = 0xFFFFFFFFFFFFFFFFULL;
-
- /* If the last word not fully utilized, mark extra bits as allocated */
- last_word_underflow = (bali->lun_bmap_size * BITS_PER_LONG);
- last_word_underflow -= bali->free_aun_cnt;
- if (last_word_underflow > 0) {
- lam = &bali->lun_alloc_map[bali->lun_bmap_size - 1];
- for (i = (HIBIT - last_word_underflow + 1);
- i < BITS_PER_LONG;
- i++)
- clear_bit(i, (ulong *)lam);
- }
-
- /* Initialize high elevator index, low/curr already at 0 from kzalloc */
- bali->free_high_idx = bali->lun_bmap_size;
-
- /* Allocate clone map */
- bali->aun_clone_map = kzalloc((bali->total_aus * sizeof(u8)),
- GFP_KERNEL);
- if (unlikely(!bali->aun_clone_map)) {
- pr_err("%s: Failed to allocate clone map: lun_id=%016llx\n",
- __func__, ba_lun->lun_id);
- kfree(bali->lun_alloc_map);
- kfree(bali);
- return -ENOMEM;
- }
-
- /* Pass the allocated LUN info as a handle to the user */
- ba_lun->ba_lun_handle = bali;
-
- pr_debug("%s: Successfully initialized the LUN: "
- "lun_id=%016llx bitmap size=%x, free_aun_cnt=%llx\n",
- __func__, ba_lun->lun_id, bali->lun_bmap_size,
- bali->free_aun_cnt);
- return 0;
-}
-
-/**
- * find_free_range() - locates a free bit within the block allocator
- * @low: First word in block allocator to start search.
- * @high: Last word in block allocator to search.
- * @bali: LUN information structure owning the block allocator to search.
- * @bit_word: Passes back the word in the block allocator owning the free bit.
- *
- * Return: The bit position within the passed back word, -1 on failure
- */
-static int find_free_range(u32 low,
- u32 high,
- struct ba_lun_info *bali, int *bit_word)
-{
- int i;
- u64 bit_pos = -1;
- ulong *lam, num_bits;
-
- for (i = low; i < high; i++)
- if (bali->lun_alloc_map[i] != 0) {
- lam = (ulong *)&bali->lun_alloc_map[i];
- num_bits = (sizeof(*lam) * BITS_PER_BYTE);
- bit_pos = find_first_bit(lam, num_bits);
-
- pr_devel("%s: Found free bit %llu in LUN "
- "map entry %016llx at bitmap index = %d\n",
- __func__, bit_pos, bali->lun_alloc_map[i], i);
-
- *bit_word = i;
- bali->free_aun_cnt--;
- clear_bit(bit_pos, lam);
- break;
- }
-
- return bit_pos;
-}
-
-/**
- * ba_alloc() - allocates a block from the block allocator
- * @ba_lun: Block allocator from which to allocate a block.
- *
- * Return: The allocated block, -1 on failure
- */
-static u64 ba_alloc(struct ba_lun *ba_lun)
-{
- u64 bit_pos = -1;
- int bit_word = 0;
- struct ba_lun_info *bali = NULL;
-
- bali = ba_lun->ba_lun_handle;
-
- pr_debug("%s: Received block allocation request: "
- "lun_id=%016llx free_aun_cnt=%llx\n",
- __func__, ba_lun->lun_id, bali->free_aun_cnt);
-
- if (bali->free_aun_cnt == 0) {
- pr_debug("%s: No space left on LUN: lun_id=%016llx\n",
- __func__, ba_lun->lun_id);
- return -1ULL;
- }
-
- /* Search to find a free entry, curr->high then low->curr */
- bit_pos = find_free_range(bali->free_curr_idx,
- bali->free_high_idx, bali, &bit_word);
- if (bit_pos == -1) {
- bit_pos = find_free_range(bali->free_low_idx,
- bali->free_curr_idx,
- bali, &bit_word);
- if (bit_pos == -1) {
- pr_debug("%s: Could not find an allocation unit on LUN:"
- " lun_id=%016llx\n", __func__, ba_lun->lun_id);
- return -1ULL;
- }
- }
-
- /* Update the free_curr_idx */
- if (bit_pos == HIBIT)
- bali->free_curr_idx = bit_word + 1;
- else
- bali->free_curr_idx = bit_word;
-
- pr_debug("%s: Allocating AU number=%llx lun_id=%016llx "
- "free_aun_cnt=%llx\n", __func__,
- ((bit_word * BITS_PER_LONG) + bit_pos), ba_lun->lun_id,
- bali->free_aun_cnt);
-
- return (u64) ((bit_word * BITS_PER_LONG) + bit_pos);
-}
-
-/**
- * validate_alloc() - validates the specified block has been allocated
- * @bali: LUN info owning the block allocator.
- * @aun: Block to validate.
- *
- * Return: 0 on success, -1 on failure
- */
-static int validate_alloc(struct ba_lun_info *bali, u64 aun)
-{
- int idx = 0, bit_pos = 0;
-
- idx = aun / BITS_PER_LONG;
- bit_pos = aun % BITS_PER_LONG;
-
- if (test_bit(bit_pos, (ulong *)&bali->lun_alloc_map[idx]))
- return -1;
-
- return 0;
-}
-
-/**
- * ba_free() - frees a block from the block allocator
- * @ba_lun: Block allocator from which to allocate a block.
- * @to_free: Block to free.
- *
- * Return: 0 on success, -1 on failure
- */
-static int ba_free(struct ba_lun *ba_lun, u64 to_free)
-{
- int idx = 0, bit_pos = 0;
- struct ba_lun_info *bali = NULL;
-
- bali = ba_lun->ba_lun_handle;
-
- if (validate_alloc(bali, to_free)) {
- pr_debug("%s: AUN %llx is not allocated on lun_id=%016llx\n",
- __func__, to_free, ba_lun->lun_id);
- return -1;
- }
-
- pr_debug("%s: Received a request to free AU=%llx lun_id=%016llx "
- "free_aun_cnt=%llx\n", __func__, to_free, ba_lun->lun_id,
- bali->free_aun_cnt);
-
- if (bali->aun_clone_map[to_free] > 0) {
- pr_debug("%s: AUN %llx lun_id=%016llx cloned. Clone count=%x\n",
- __func__, to_free, ba_lun->lun_id,
- bali->aun_clone_map[to_free]);
- bali->aun_clone_map[to_free]--;
- return 0;
- }
-
- idx = to_free / BITS_PER_LONG;
- bit_pos = to_free % BITS_PER_LONG;
-
- set_bit(bit_pos, (ulong *)&bali->lun_alloc_map[idx]);
- bali->free_aun_cnt++;
-
- if (idx < bali->free_low_idx)
- bali->free_low_idx = idx;
- else if (idx > bali->free_high_idx)
- bali->free_high_idx = idx;
-
- pr_debug("%s: Successfully freed AU bit_pos=%x bit map index=%x "
- "lun_id=%016llx free_aun_cnt=%llx\n", __func__, bit_pos, idx,
- ba_lun->lun_id, bali->free_aun_cnt);
-
- return 0;
-}
-
-/**
- * ba_clone() - Clone a chunk of the block allocation table
- * @ba_lun: Block allocator from which to allocate a block.
- * @to_clone: Block to clone.
- *
- * Return: 0 on success, -1 on failure
- */
-static int ba_clone(struct ba_lun *ba_lun, u64 to_clone)
-{
- struct ba_lun_info *bali = ba_lun->ba_lun_handle;
-
- if (validate_alloc(bali, to_clone)) {
- pr_debug("%s: AUN=%llx not allocated on lun_id=%016llx\n",
- __func__, to_clone, ba_lun->lun_id);
- return -1;
- }
-
- pr_debug("%s: Received a request to clone AUN %llx on lun_id=%016llx\n",
- __func__, to_clone, ba_lun->lun_id);
-
- if (bali->aun_clone_map[to_clone] == MAX_AUN_CLONE_CNT) {
- pr_debug("%s: AUN %llx on lun_id=%016llx hit max clones already\n",
- __func__, to_clone, ba_lun->lun_id);
- return -1;
- }
-
- bali->aun_clone_map[to_clone]++;
-
- return 0;
-}
-
-/**
- * ba_space() - returns the amount of free space left in the block allocator
- * @ba_lun: Block allocator.
- *
- * Return: Amount of free space in block allocator
- */
-static u64 ba_space(struct ba_lun *ba_lun)
-{
- struct ba_lun_info *bali = ba_lun->ba_lun_handle;
-
- return bali->free_aun_cnt;
-}
-
-/**
- * cxlflash_ba_terminate() - frees resources associated with the block allocator
- * @ba_lun: Block allocator.
- *
- * Safe to call in a partially allocated state.
- */
-void cxlflash_ba_terminate(struct ba_lun *ba_lun)
-{
- struct ba_lun_info *bali = ba_lun->ba_lun_handle;
-
- if (bali) {
- kfree(bali->aun_clone_map);
- kfree(bali->lun_alloc_map);
- kfree(bali);
- ba_lun->ba_lun_handle = NULL;
- }
-}
-
-/**
- * init_vlun() - initializes a LUN for virtual use
- * @lli: LUN information structure that owns the block allocator.
- *
- * Return: 0 on success, -errno on failure
- */
-static int init_vlun(struct llun_info *lli)
-{
- int rc = 0;
- struct glun_info *gli = lli->parent;
- struct blka *blka = &gli->blka;
-
- memset(blka, 0, sizeof(*blka));
- mutex_init(&blka->mutex);
-
- /* LUN IDs are unique per port, save the index instead */
- blka->ba_lun.lun_id = lli->lun_index;
- blka->ba_lun.lsize = gli->max_lba + 1;
- blka->ba_lun.lba_size = gli->blk_len;
-
- blka->ba_lun.au_size = MC_CHUNK_SIZE;
- blka->nchunk = blka->ba_lun.lsize / MC_CHUNK_SIZE;
-
- rc = ba_init(&blka->ba_lun);
- if (unlikely(rc))
- pr_debug("%s: cannot init block_alloc, rc=%d\n", __func__, rc);
-
- pr_debug("%s: returning rc=%d lli=%p\n", __func__, rc, lli);
- return rc;
-}
-
-/**
- * write_same16() - sends a SCSI WRITE_SAME16 (0) command to specified LUN
- * @sdev: SCSI device associated with LUN.
- * @lba: Logical block address to start write same.
- * @nblks: Number of logical blocks to write same.
- *
- * The SCSI WRITE_SAME16 can take quite a while to complete. Should an EEH occur
- * while in scsi_execute_cmd(), the EEH handler will attempt to recover. As
- * part of the recovery, the handler drains all currently running ioctls,
- * waiting until they have completed before proceeding with a reset. As this
- * routine is used on the ioctl path, this can create a condition where the
- * EEH handler becomes stuck, infinitely waiting for this ioctl thread. To
- * avoid this behavior, temporarily unmark this thread as an ioctl thread by
- * releasing the ioctl read semaphore. This will allow the EEH handler to
- * proceed with a recovery while this thread is still running. Once the
- * scsi_execute_cmd() returns, reacquire the ioctl read semaphore and check the
- * adapter state in case it changed while inside of scsi_execute_cmd(). The
- * state check will wait if the adapter is still being recovered or return a
- * failure if the recovery failed. In the event that the adapter reset failed,
- * simply return the failure as the ioctl would be unable to continue.
- *
- * Note that the above puts a requirement on this routine to only be called on
- * an ioctl thread.
- *
- * Return: 0 on success, -errno on failure
- */
-static int write_same16(struct scsi_device *sdev,
- u64 lba,
- u32 nblks)
-{
- u8 *cmd_buf = NULL;
- u8 *scsi_cmd = NULL;
- int rc = 0;
- int result = 0;
- u64 offset = lba;
- int left = nblks;
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- const u32 s = ilog2(sdev->sector_size) - 9;
- const u32 to = sdev->request_queue->rq_timeout;
- const u32 ws_limit =
- sdev->request_queue->limits.max_write_zeroes_sectors >> s;
-
- cmd_buf = kzalloc(CMD_BUFSIZE, GFP_KERNEL);
- scsi_cmd = kzalloc(MAX_COMMAND_SIZE, GFP_KERNEL);
- if (unlikely(!cmd_buf || !scsi_cmd)) {
- rc = -ENOMEM;
- goto out;
- }
-
- while (left > 0) {
-
- scsi_cmd[0] = WRITE_SAME_16;
- scsi_cmd[1] = cfg->ws_unmap ? 0x8 : 0;
- put_unaligned_be64(offset, &scsi_cmd[2]);
- put_unaligned_be32(ws_limit < left ? ws_limit : left,
- &scsi_cmd[10]);
-
- /* Drop the ioctl read semaphore across lengthy call */
- up_read(&cfg->ioctl_rwsem);
- result = scsi_execute_cmd(sdev, scsi_cmd, REQ_OP_DRV_OUT,
- cmd_buf, CMD_BUFSIZE, to,
- CMD_RETRIES, NULL);
- down_read(&cfg->ioctl_rwsem);
- rc = check_state(cfg);
- if (rc) {
- dev_err(dev, "%s: Failed state result=%08x\n",
- __func__, result);
- rc = -ENODEV;
- goto out;
- }
-
- if (result) {
- dev_err_ratelimited(dev, "%s: command failed for "
- "offset=%lld result=%08x\n",
- __func__, offset, result);
- rc = -EIO;
- goto out;
- }
- left -= ws_limit;
- offset += ws_limit;
- }
-
-out:
- kfree(cmd_buf);
- kfree(scsi_cmd);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * grow_lxt() - expands the translation table associated with the specified RHTE
- * @afu: AFU associated with the host.
- * @sdev: SCSI device associated with LUN.
- * @ctxid: Context ID of context owning the RHTE.
- * @rhndl: Resource handle associated with the RHTE.
- * @rhte: Resource handle entry (RHTE).
- * @new_size: Number of translation entries associated with RHTE.
- *
- * By design, this routine employs a 'best attempt' allocation and will
- * truncate the requested size down if there is not sufficient space in
- * the block allocator to satisfy the request but there does exist some
- * amount of space. The user is made aware of this by returning the size
- * allocated.
- *
- * Return: 0 on success, -errno on failure
- */
-static int grow_lxt(struct afu *afu,
- struct scsi_device *sdev,
- ctx_hndl_t ctxid,
- res_hndl_t rhndl,
- struct sisl_rht_entry *rhte,
- u64 *new_size)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct sisl_lxt_entry *lxt = NULL, *lxt_old = NULL;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct blka *blka = &gli->blka;
- u32 av_size;
- u32 ngrps, ngrps_old;
- u64 aun; /* chunk# allocated by block allocator */
- u64 delta = *new_size - rhte->lxt_cnt;
- u64 my_new_size;
- int i, rc = 0;
-
- /*
- * Check what is available in the block allocator before re-allocating
- * LXT array. This is done up front under the mutex which must not be
- * released until after allocation is complete.
- */
- mutex_lock(&blka->mutex);
- av_size = ba_space(&blka->ba_lun);
- if (unlikely(av_size <= 0)) {
- dev_dbg(dev, "%s: ba_space error av_size=%d\n",
- __func__, av_size);
- mutex_unlock(&blka->mutex);
- rc = -ENOSPC;
- goto out;
- }
-
- if (av_size < delta)
- delta = av_size;
-
- lxt_old = rhte->lxt_start;
- ngrps_old = LXT_NUM_GROUPS(rhte->lxt_cnt);
- ngrps = LXT_NUM_GROUPS(rhte->lxt_cnt + delta);
-
- if (ngrps != ngrps_old) {
- /* reallocate to fit new size */
- lxt = kzalloc((sizeof(*lxt) * LXT_GROUP_SIZE * ngrps),
- GFP_KERNEL);
- if (unlikely(!lxt)) {
- mutex_unlock(&blka->mutex);
- rc = -ENOMEM;
- goto out;
- }
-
- /* copy over all old entries */
- memcpy(lxt, lxt_old, (sizeof(*lxt) * rhte->lxt_cnt));
- } else
- lxt = lxt_old;
-
- /* nothing can fail from now on */
- my_new_size = rhte->lxt_cnt + delta;
-
- /* add new entries to the end */
- for (i = rhte->lxt_cnt; i < my_new_size; i++) {
- /*
- * Due to the earlier check of available space, ba_alloc
- * cannot fail here. If it did due to internal error,
- * leave a rlba_base of -1u which will likely be a
- * invalid LUN (too large).
- */
- aun = ba_alloc(&blka->ba_lun);
- if ((aun == -1ULL) || (aun >= blka->nchunk))
- dev_dbg(dev, "%s: ba_alloc error allocated chunk=%llu "
- "max=%llu\n", __func__, aun, blka->nchunk - 1);
-
- /* select both ports, use r/w perms from RHT */
- lxt[i].rlba_base = ((aun << MC_CHUNK_SHIFT) |
- (lli->lun_index << LXT_LUNIDX_SHIFT) |
- (RHT_PERM_RW << LXT_PERM_SHIFT |
- lli->port_sel));
- }
-
- mutex_unlock(&blka->mutex);
-
- /*
- * The following sequence is prescribed in the SISlite spec
- * for syncing up with the AFU when adding LXT entries.
- */
- dma_wmb(); /* Make LXT updates are visible */
-
- rhte->lxt_start = lxt;
- dma_wmb(); /* Make RHT entry's LXT table update visible */
-
- rhte->lxt_cnt = my_new_size;
- dma_wmb(); /* Make RHT entry's LXT table size update visible */
-
- rc = cxlflash_afu_sync(afu, ctxid, rhndl, AFU_LW_SYNC);
- if (unlikely(rc))
- rc = -EAGAIN;
-
- /* free old lxt if reallocated */
- if (lxt != lxt_old)
- kfree(lxt_old);
- *new_size = my_new_size;
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * shrink_lxt() - reduces translation table associated with the specified RHTE
- * @afu: AFU associated with the host.
- * @sdev: SCSI device associated with LUN.
- * @rhndl: Resource handle associated with the RHTE.
- * @rhte: Resource handle entry (RHTE).
- * @ctxi: Context owning resources.
- * @new_size: Number of translation entries associated with RHTE.
- *
- * Return: 0 on success, -errno on failure
- */
-static int shrink_lxt(struct afu *afu,
- struct scsi_device *sdev,
- res_hndl_t rhndl,
- struct sisl_rht_entry *rhte,
- struct ctx_info *ctxi,
- u64 *new_size)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct sisl_lxt_entry *lxt, *lxt_old;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct blka *blka = &gli->blka;
- ctx_hndl_t ctxid = DECODE_CTXID(ctxi->ctxid);
- bool needs_ws = ctxi->rht_needs_ws[rhndl];
- bool needs_sync = !ctxi->err_recovery_active;
- u32 ngrps, ngrps_old;
- u64 aun; /* chunk# allocated by block allocator */
- u64 delta = rhte->lxt_cnt - *new_size;
- u64 my_new_size;
- int i, rc = 0;
-
- lxt_old = rhte->lxt_start;
- ngrps_old = LXT_NUM_GROUPS(rhte->lxt_cnt);
- ngrps = LXT_NUM_GROUPS(rhte->lxt_cnt - delta);
-
- if (ngrps != ngrps_old) {
- /* Reallocate to fit new size unless new size is 0 */
- if (ngrps) {
- lxt = kzalloc((sizeof(*lxt) * LXT_GROUP_SIZE * ngrps),
- GFP_KERNEL);
- if (unlikely(!lxt)) {
- rc = -ENOMEM;
- goto out;
- }
-
- /* Copy over old entries that will remain */
- memcpy(lxt, lxt_old,
- (sizeof(*lxt) * (rhte->lxt_cnt - delta)));
- } else
- lxt = NULL;
- } else
- lxt = lxt_old;
-
- /* Nothing can fail from now on */
- my_new_size = rhte->lxt_cnt - delta;
-
- /*
- * The following sequence is prescribed in the SISlite spec
- * for syncing up with the AFU when removing LXT entries.
- */
- rhte->lxt_cnt = my_new_size;
- dma_wmb(); /* Make RHT entry's LXT table size update visible */
-
- rhte->lxt_start = lxt;
- dma_wmb(); /* Make RHT entry's LXT table update visible */
-
- if (needs_sync) {
- rc = cxlflash_afu_sync(afu, ctxid, rhndl, AFU_HW_SYNC);
- if (unlikely(rc))
- rc = -EAGAIN;
- }
-
- if (needs_ws) {
- /*
- * Mark the context as unavailable, so that we can release
- * the mutex safely.
- */
- ctxi->unavail = true;
- mutex_unlock(&ctxi->mutex);
- }
-
- /* Free LBAs allocated to freed chunks */
- mutex_lock(&blka->mutex);
- for (i = delta - 1; i >= 0; i--) {
- aun = lxt_old[my_new_size + i].rlba_base >> MC_CHUNK_SHIFT;
- if (needs_ws)
- write_same16(sdev, aun, MC_CHUNK_SIZE);
- ba_free(&blka->ba_lun, aun);
- }
- mutex_unlock(&blka->mutex);
-
- if (needs_ws) {
- /* Make the context visible again */
- mutex_lock(&ctxi->mutex);
- ctxi->unavail = false;
- }
-
- /* Free old lxt if reallocated */
- if (lxt != lxt_old)
- kfree(lxt_old);
- *new_size = my_new_size;
-out:
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * _cxlflash_vlun_resize() - changes the size of a virtual LUN
- * @sdev: SCSI device associated with LUN owning virtual LUN.
- * @ctxi: Context owning resources.
- * @resize: Resize ioctl data structure.
- *
- * On successful return, the user is informed of the new size (in blocks)
- * of the virtual LUN in last LBA format. When the size of the virtual
- * LUN is zero, the last LBA is reflected as -1. See comment in the
- * prologue for _cxlflash_disk_release() regarding AFU syncs and contexts
- * on the error recovery list.
- *
- * Return: 0 on success, -errno on failure
- */
-int _cxlflash_vlun_resize(struct scsi_device *sdev,
- struct ctx_info *ctxi,
- struct dk_cxlflash_resize *resize)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct afu *afu = cfg->afu;
- bool put_ctx = false;
-
- res_hndl_t rhndl = resize->rsrc_handle;
- u64 new_size;
- u64 nsectors;
- u64 ctxid = DECODE_CTXID(resize->context_id),
- rctxid = resize->context_id;
-
- struct sisl_rht_entry *rhte;
-
- int rc = 0;
-
- /*
- * The requested size (req_size) is always assumed to be in 4k blocks,
- * so we have to convert it here from 4k to chunk size.
- */
- nsectors = (resize->req_size * CXLFLASH_BLOCK_SIZE) / gli->blk_len;
- new_size = DIV_ROUND_UP(nsectors, MC_CHUNK_SIZE);
-
- dev_dbg(dev, "%s: ctxid=%llu rhndl=%llu req_size=%llu new_size=%llu\n",
- __func__, ctxid, resize->rsrc_handle, resize->req_size,
- new_size);
-
- if (unlikely(gli->mode != MODE_VIRTUAL)) {
- dev_dbg(dev, "%s: LUN mode does not support resize mode=%d\n",
- __func__, gli->mode);
- rc = -EINVAL;
- goto out;
-
- }
-
- if (!ctxi) {
- ctxi = get_context(cfg, rctxid, lli, CTX_CTRL_ERR_FALLBACK);
- if (unlikely(!ctxi)) {
- dev_dbg(dev, "%s: Bad context ctxid=%llu\n",
- __func__, ctxid);
- rc = -EINVAL;
- goto out;
- }
-
- put_ctx = true;
- }
-
- rhte = get_rhte(ctxi, rhndl, lli);
- if (unlikely(!rhte)) {
- dev_dbg(dev, "%s: Bad resource handle rhndl=%u\n",
- __func__, rhndl);
- rc = -EINVAL;
- goto out;
- }
-
- if (new_size > rhte->lxt_cnt)
- rc = grow_lxt(afu, sdev, ctxid, rhndl, rhte, &new_size);
- else if (new_size < rhte->lxt_cnt)
- rc = shrink_lxt(afu, sdev, rhndl, rhte, ctxi, &new_size);
- else {
- /*
- * Rare case where there is already sufficient space, just
- * need to perform a translation sync with the AFU. This
- * scenario likely follows a previous sync failure during
- * a resize operation. Accordingly, perform the heavyweight
- * form of translation sync as it is unknown which type of
- * resize failed previously.
- */
- rc = cxlflash_afu_sync(afu, ctxid, rhndl, AFU_HW_SYNC);
- if (unlikely(rc)) {
- rc = -EAGAIN;
- goto out;
- }
- }
-
- resize->hdr.return_flags = 0;
- resize->last_lba = (new_size * MC_CHUNK_SIZE * gli->blk_len);
- resize->last_lba /= CXLFLASH_BLOCK_SIZE;
- resize->last_lba--;
-
-out:
- if (put_ctx)
- put_context(ctxi);
- dev_dbg(dev, "%s: resized to %llu returning rc=%d\n",
- __func__, resize->last_lba, rc);
- return rc;
-}
-
-int cxlflash_vlun_resize(struct scsi_device *sdev, void *resize)
-{
- return _cxlflash_vlun_resize(sdev, NULL, resize);
-}
-
-/**
- * cxlflash_restore_luntable() - Restore LUN table to prior state
- * @cfg: Internal structure associated with the host.
- */
-void cxlflash_restore_luntable(struct cxlflash_cfg *cfg)
-{
- struct llun_info *lli, *temp;
- u32 lind;
- int k;
- struct device *dev = &cfg->dev->dev;
- __be64 __iomem *fc_port_luns;
-
- mutex_lock(&global.mutex);
-
- list_for_each_entry_safe(lli, temp, &cfg->lluns, list) {
- if (!lli->in_table)
- continue;
-
- lind = lli->lun_index;
- dev_dbg(dev, "%s: Virtual LUNs on slot %d:\n", __func__, lind);
-
- for (k = 0; k < cfg->num_fc_ports; k++)
- if (lli->port_sel & (1 << k)) {
- fc_port_luns = get_fc_port_luns(cfg, k);
- writeq_be(lli->lun_id[k], &fc_port_luns[lind]);
- dev_dbg(dev, "\t%d=%llx\n", k, lli->lun_id[k]);
- }
- }
-
- mutex_unlock(&global.mutex);
-}
-
-/**
- * get_num_ports() - compute number of ports from port selection mask
- * @psm: Port selection mask.
- *
- * Return: Population count of port selection mask
- */
-static inline u8 get_num_ports(u32 psm)
-{
- static const u8 bits[16] = { 0, 1, 1, 2, 1, 2, 2, 3,
- 1, 2, 2, 3, 2, 3, 3, 4 };
-
- return bits[psm & 0xf];
-}
-
-/**
- * init_luntable() - write an entry in the LUN table
- * @cfg: Internal structure associated with the host.
- * @lli: Per adapter LUN information structure.
- *
- * On successful return, a LUN table entry is created:
- * - at the top for LUNs visible on multiple ports.
- * - at the bottom for LUNs visible only on one port.
- *
- * Return: 0 on success, -errno on failure
- */
-static int init_luntable(struct cxlflash_cfg *cfg, struct llun_info *lli)
-{
- u32 chan;
- u32 lind;
- u32 nports;
- int rc = 0;
- int k;
- struct device *dev = &cfg->dev->dev;
- __be64 __iomem *fc_port_luns;
-
- mutex_lock(&global.mutex);
-
- if (lli->in_table)
- goto out;
-
- nports = get_num_ports(lli->port_sel);
- if (nports == 0 || nports > cfg->num_fc_ports) {
- WARN(1, "Unsupported port configuration nports=%u", nports);
- rc = -EIO;
- goto out;
- }
-
- if (nports > 1) {
- /*
- * When LUN is visible from multiple ports, we will put
- * it in the top half of the LUN table.
- */
- for (k = 0; k < cfg->num_fc_ports; k++) {
- if (!(lli->port_sel & (1 << k)))
- continue;
-
- if (cfg->promote_lun_index == cfg->last_lun_index[k]) {
- rc = -ENOSPC;
- goto out;
- }
- }
-
- lind = lli->lun_index = cfg->promote_lun_index;
- dev_dbg(dev, "%s: Virtual LUNs on slot %d:\n", __func__, lind);
-
- for (k = 0; k < cfg->num_fc_ports; k++) {
- if (!(lli->port_sel & (1 << k)))
- continue;
-
- fc_port_luns = get_fc_port_luns(cfg, k);
- writeq_be(lli->lun_id[k], &fc_port_luns[lind]);
- dev_dbg(dev, "\t%d=%llx\n", k, lli->lun_id[k]);
- }
-
- cfg->promote_lun_index++;
- } else {
- /*
- * When LUN is visible only from one port, we will put
- * it in the bottom half of the LUN table.
- */
- chan = PORTMASK2CHAN(lli->port_sel);
- if (cfg->promote_lun_index == cfg->last_lun_index[chan]) {
- rc = -ENOSPC;
- goto out;
- }
-
- lind = lli->lun_index = cfg->last_lun_index[chan];
- fc_port_luns = get_fc_port_luns(cfg, chan);
- writeq_be(lli->lun_id[chan], &fc_port_luns[lind]);
- cfg->last_lun_index[chan]--;
- dev_dbg(dev, "%s: Virtual LUNs on slot %d:\n\t%d=%llx\n",
- __func__, lind, chan, lli->lun_id[chan]);
- }
-
- lli->in_table = true;
-out:
- mutex_unlock(&global.mutex);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
-
-/**
- * cxlflash_disk_virtual_open() - open a virtual disk of specified size
- * @sdev: SCSI device associated with LUN owning virtual LUN.
- * @arg: UVirtual ioctl data structure.
- *
- * On successful return, the user is informed of the resource handle
- * to be used to identify the virtual LUN and the size (in blocks) of
- * the virtual LUN in last LBA format. When the size of the virtual LUN
- * is zero, the last LBA is reflected as -1.
- *
- * Return: 0 on success, -errno on failure
- */
-int cxlflash_disk_virtual_open(struct scsi_device *sdev, void *arg)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
-
- struct dk_cxlflash_uvirtual *virt = (struct dk_cxlflash_uvirtual *)arg;
- struct dk_cxlflash_resize resize;
-
- u64 ctxid = DECODE_CTXID(virt->context_id),
- rctxid = virt->context_id;
- u64 lun_size = virt->lun_size;
- u64 last_lba = 0;
- u64 rsrc_handle = -1;
-
- int rc = 0;
-
- struct ctx_info *ctxi = NULL;
- struct sisl_rht_entry *rhte = NULL;
-
- dev_dbg(dev, "%s: ctxid=%llu ls=%llu\n", __func__, ctxid, lun_size);
-
- /* Setup the LUNs block allocator on first call */
- mutex_lock(&gli->mutex);
- if (gli->mode == MODE_NONE) {
- rc = init_vlun(lli);
- if (rc) {
- dev_err(dev, "%s: init_vlun failed rc=%d\n",
- __func__, rc);
- rc = -ENOMEM;
- goto err0;
- }
- }
-
- rc = cxlflash_lun_attach(gli, MODE_VIRTUAL, true);
- if (unlikely(rc)) {
- dev_err(dev, "%s: Failed attach to LUN (VIRTUAL)\n", __func__);
- goto err0;
- }
- mutex_unlock(&gli->mutex);
-
- rc = init_luntable(cfg, lli);
- if (rc) {
- dev_err(dev, "%s: init_luntable failed rc=%d\n", __func__, rc);
- goto err1;
- }
-
- ctxi = get_context(cfg, rctxid, lli, 0);
- if (unlikely(!ctxi)) {
- dev_err(dev, "%s: Bad context ctxid=%llu\n", __func__, ctxid);
- rc = -EINVAL;
- goto err1;
- }
-
- rhte = rhte_checkout(ctxi, lli);
- if (unlikely(!rhte)) {
- dev_err(dev, "%s: too many opens ctxid=%llu\n",
- __func__, ctxid);
- rc = -EMFILE; /* too many opens */
- goto err1;
- }
-
- rsrc_handle = (rhte - ctxi->rht_start);
-
- /* Populate RHT format 0 */
- rhte->nmask = MC_RHT_NMASK;
- rhte->fp = SISL_RHT_FP(0U, ctxi->rht_perms);
-
- /* Resize even if requested size is 0 */
- marshal_virt_to_resize(virt, &resize);
- resize.rsrc_handle = rsrc_handle;
- rc = _cxlflash_vlun_resize(sdev, ctxi, &resize);
- if (rc) {
- dev_err(dev, "%s: resize failed rc=%d\n", __func__, rc);
- goto err2;
- }
- last_lba = resize.last_lba;
-
- if (virt->hdr.flags & DK_CXLFLASH_UVIRTUAL_NEED_WRITE_SAME)
- ctxi->rht_needs_ws[rsrc_handle] = true;
-
- virt->hdr.return_flags = 0;
- virt->last_lba = last_lba;
- virt->rsrc_handle = rsrc_handle;
-
- if (get_num_ports(lli->port_sel) > 1)
- virt->hdr.return_flags |= DK_CXLFLASH_ALL_PORTS_ACTIVE;
-out:
- if (likely(ctxi))
- put_context(ctxi);
- dev_dbg(dev, "%s: returning handle=%llu rc=%d llba=%llu\n",
- __func__, rsrc_handle, rc, last_lba);
- return rc;
-
-err2:
- rhte_checkin(ctxi, rhte);
-err1:
- cxlflash_lun_detach(gli);
- goto out;
-err0:
- /* Special common cleanup prior to successful LUN attach */
- cxlflash_ba_terminate(&gli->blka.ba_lun);
- mutex_unlock(&gli->mutex);
- goto out;
-}
-
-/**
- * clone_lxt() - copies translation tables from source to destination RHTE
- * @afu: AFU associated with the host.
- * @blka: Block allocator associated with LUN.
- * @ctxid: Context ID of context owning the RHTE.
- * @rhndl: Resource handle associated with the RHTE.
- * @rhte: Destination resource handle entry (RHTE).
- * @rhte_src: Source resource handle entry (RHTE).
- *
- * Return: 0 on success, -errno on failure
- */
-static int clone_lxt(struct afu *afu,
- struct blka *blka,
- ctx_hndl_t ctxid,
- res_hndl_t rhndl,
- struct sisl_rht_entry *rhte,
- struct sisl_rht_entry *rhte_src)
-{
- struct cxlflash_cfg *cfg = afu->parent;
- struct device *dev = &cfg->dev->dev;
- struct sisl_lxt_entry *lxt = NULL;
- bool locked = false;
- u32 ngrps;
- u64 aun; /* chunk# allocated by block allocator */
- int j;
- int i = 0;
- int rc = 0;
-
- ngrps = LXT_NUM_GROUPS(rhte_src->lxt_cnt);
-
- if (ngrps) {
- /* allocate new LXTs for clone */
- lxt = kzalloc((sizeof(*lxt) * LXT_GROUP_SIZE * ngrps),
- GFP_KERNEL);
- if (unlikely(!lxt)) {
- rc = -ENOMEM;
- goto out;
- }
-
- /* copy over */
- memcpy(lxt, rhte_src->lxt_start,
- (sizeof(*lxt) * rhte_src->lxt_cnt));
-
- /* clone the LBAs in block allocator via ref_cnt, note that the
- * block allocator mutex must be held until it is established
- * that this routine will complete without the need for a
- * cleanup.
- */
- mutex_lock(&blka->mutex);
- locked = true;
- for (i = 0; i < rhte_src->lxt_cnt; i++) {
- aun = (lxt[i].rlba_base >> MC_CHUNK_SHIFT);
- if (ba_clone(&blka->ba_lun, aun) == -1ULL) {
- rc = -EIO;
- goto err;
- }
- }
- }
-
- /*
- * The following sequence is prescribed in the SISlite spec
- * for syncing up with the AFU when adding LXT entries.
- */
- dma_wmb(); /* Make LXT updates are visible */
-
- rhte->lxt_start = lxt;
- dma_wmb(); /* Make RHT entry's LXT table update visible */
-
- rhte->lxt_cnt = rhte_src->lxt_cnt;
- dma_wmb(); /* Make RHT entry's LXT table size update visible */
-
- rc = cxlflash_afu_sync(afu, ctxid, rhndl, AFU_LW_SYNC);
- if (unlikely(rc)) {
- rc = -EAGAIN;
- goto err2;
- }
-
-out:
- if (locked)
- mutex_unlock(&blka->mutex);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-err2:
- /* Reset the RHTE */
- rhte->lxt_cnt = 0;
- dma_wmb();
- rhte->lxt_start = NULL;
- dma_wmb();
-err:
- /* free the clones already made */
- for (j = 0; j < i; j++) {
- aun = (lxt[j].rlba_base >> MC_CHUNK_SHIFT);
- ba_free(&blka->ba_lun, aun);
- }
- kfree(lxt);
- goto out;
-}
-
-/**
- * cxlflash_disk_clone() - clone a context by making snapshot of another
- * @sdev: SCSI device associated with LUN owning virtual LUN.
- * @arg: Clone ioctl data structure.
- *
- * This routine effectively performs cxlflash_disk_open operation for each
- * in-use virtual resource in the source context. Note that the destination
- * context must be in pristine state and cannot have any resource handles
- * open at the time of the clone.
- *
- * Return: 0 on success, -errno on failure
- */
-int cxlflash_disk_clone(struct scsi_device *sdev, void *arg)
-{
- struct dk_cxlflash_clone *clone = arg;
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = sdev->hostdata;
- struct glun_info *gli = lli->parent;
- struct blka *blka = &gli->blka;
- struct afu *afu = cfg->afu;
- struct dk_cxlflash_release release = { { 0 }, 0 };
-
- struct ctx_info *ctxi_src = NULL,
- *ctxi_dst = NULL;
- struct lun_access *lun_access_src, *lun_access_dst;
- u32 perms;
- u64 ctxid_src = DECODE_CTXID(clone->context_id_src),
- ctxid_dst = DECODE_CTXID(clone->context_id_dst),
- rctxid_src = clone->context_id_src,
- rctxid_dst = clone->context_id_dst;
- int i, j;
- int rc = 0;
- bool found;
- LIST_HEAD(sidecar);
-
- dev_dbg(dev, "%s: ctxid_src=%llu ctxid_dst=%llu\n",
- __func__, ctxid_src, ctxid_dst);
-
- /* Do not clone yourself */
- if (unlikely(rctxid_src == rctxid_dst)) {
- rc = -EINVAL;
- goto out;
- }
-
- if (unlikely(gli->mode != MODE_VIRTUAL)) {
- rc = -EINVAL;
- dev_dbg(dev, "%s: Only supported on virtual LUNs mode=%u\n",
- __func__, gli->mode);
- goto out;
- }
-
- ctxi_src = get_context(cfg, rctxid_src, lli, CTX_CTRL_CLONE);
- ctxi_dst = get_context(cfg, rctxid_dst, lli, 0);
- if (unlikely(!ctxi_src || !ctxi_dst)) {
- dev_dbg(dev, "%s: Bad context ctxid_src=%llu ctxid_dst=%llu\n",
- __func__, ctxid_src, ctxid_dst);
- rc = -EINVAL;
- goto out;
- }
-
- /* Verify there is no open resource handle in the destination context */
- for (i = 0; i < MAX_RHT_PER_CONTEXT; i++)
- if (ctxi_dst->rht_start[i].nmask != 0) {
- rc = -EINVAL;
- goto out;
- }
-
- /* Clone LUN access list */
- list_for_each_entry(lun_access_src, &ctxi_src->luns, list) {
- found = false;
- list_for_each_entry(lun_access_dst, &ctxi_dst->luns, list)
- if (lun_access_dst->sdev == lun_access_src->sdev) {
- found = true;
- break;
- }
-
- if (!found) {
- lun_access_dst = kzalloc(sizeof(*lun_access_dst),
- GFP_KERNEL);
- if (unlikely(!lun_access_dst)) {
- dev_err(dev, "%s: lun_access allocation fail\n",
- __func__);
- rc = -ENOMEM;
- goto out;
- }
-
- *lun_access_dst = *lun_access_src;
- list_add(&lun_access_dst->list, &sidecar);
- }
- }
-
- if (unlikely(!ctxi_src->rht_out)) {
- dev_dbg(dev, "%s: Nothing to clone\n", __func__);
- goto out_success;
- }
-
- /* User specified permission on attach */
- perms = ctxi_dst->rht_perms;
-
- /*
- * Copy over checked-out RHT (and their associated LXT) entries by
- * hand, stopping after we've copied all outstanding entries and
- * cleaning up if the clone fails.
- *
- * Note: This loop is equivalent to performing cxlflash_disk_open and
- * cxlflash_vlun_resize. As such, LUN accounting needs to be taken into
- * account by attaching after each successful RHT entry clone. In the
- * event that a clone failure is experienced, the LUN detach is handled
- * via the cleanup performed by _cxlflash_disk_release.
- */
- for (i = 0; i < MAX_RHT_PER_CONTEXT; i++) {
- if (ctxi_src->rht_out == ctxi_dst->rht_out)
- break;
- if (ctxi_src->rht_start[i].nmask == 0)
- continue;
-
- /* Consume a destination RHT entry */
- ctxi_dst->rht_out++;
- ctxi_dst->rht_start[i].nmask = ctxi_src->rht_start[i].nmask;
- ctxi_dst->rht_start[i].fp =
- SISL_RHT_FP_CLONE(ctxi_src->rht_start[i].fp, perms);
- ctxi_dst->rht_lun[i] = ctxi_src->rht_lun[i];
-
- rc = clone_lxt(afu, blka, ctxid_dst, i,
- &ctxi_dst->rht_start[i],
- &ctxi_src->rht_start[i]);
- if (rc) {
- marshal_clone_to_rele(clone, &release);
- for (j = 0; j < i; j++) {
- release.rsrc_handle = j;
- _cxlflash_disk_release(sdev, ctxi_dst,
- &release);
- }
-
- /* Put back the one we failed on */
- rhte_checkin(ctxi_dst, &ctxi_dst->rht_start[i]);
- goto err;
- }
-
- cxlflash_lun_attach(gli, gli->mode, false);
- }
-
-out_success:
- list_splice(&sidecar, &ctxi_dst->luns);
-
- /* fall through */
-out:
- if (ctxi_src)
- put_context(ctxi_src);
- if (ctxi_dst)
- put_context(ctxi_dst);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-
-err:
- list_for_each_entry_safe(lun_access_src, lun_access_dst, &sidecar, list)
- kfree(lun_access_src);
- goto out;
-}
diff --git a/drivers/scsi/cxlflash/vlun.h b/drivers/scsi/cxlflash/vlun.h
deleted file mode 100644
index 68e3ea52fe80..000000000000
--- a/drivers/scsi/cxlflash/vlun.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#ifndef _CXLFLASH_VLUN_H
-#define _CXLFLASH_VLUN_H
-
-/* RHT - Resource Handle Table */
-#define MC_RHT_NMASK 16 /* in bits */
-#define MC_CHUNK_SHIFT MC_RHT_NMASK /* shift to go from LBA to chunk# */
-
-#define HIBIT (BITS_PER_LONG - 1)
-
-#define MAX_AUN_CLONE_CNT 0xFF
-
-/*
- * LXT - LBA Translation Table
- *
- * +-------+-------+-------+-------+-------+-------+-------+---+---+
- * | RLBA_BASE |LUN_IDX| P |SEL|
- * +-------+-------+-------+-------+-------+-------+-------+---+---+
- *
- * The LXT Entry contains the physical LBA where the chunk starts (RLBA_BASE).
- * AFU ORes the low order bits from the virtual LBA (offset into the chunk)
- * with RLBA_BASE. The result is the physical LBA to be sent to storage.
- * The LXT Entry also contains an index to a LUN TBL and a bitmask of which
- * outgoing (FC) * ports can be selected. The port select bit-mask is ANDed
- * with a global port select bit-mask maintained by the driver.
- * In addition, it has permission bits that are ANDed with the
- * RHT permissions to arrive at the final permissions for the chunk.
- *
- * LXT tables are allocated dynamically in groups. This is done to avoid
- * a malloc/free overhead each time the LXT has to grow or shrink.
- *
- * Based on the current lxt_cnt (used), it is always possible to know
- * how many are allocated (used+free). The number of allocated entries is
- * not stored anywhere.
- *
- * The LXT table is re-allocated whenever it needs to cross into another group.
- */
-#define LXT_GROUP_SIZE 8
-#define LXT_NUM_GROUPS(lxt_cnt) (((lxt_cnt) + 7)/8) /* alloc'ed groups */
-#define LXT_LUNIDX_SHIFT 8 /* LXT entry, shift for LUN index */
-#define LXT_PERM_SHIFT 4 /* LXT entry, shift for permission bits */
-
-struct ba_lun_info {
- u64 *lun_alloc_map;
- u32 lun_bmap_size;
- u32 total_aus;
- u64 free_aun_cnt;
-
- /* indices to be used for elevator lookup of free map */
- u32 free_low_idx;
- u32 free_curr_idx;
- u32 free_high_idx;
-
- u8 *aun_clone_map;
-};
-
-struct ba_lun {
- u64 lun_id;
- u64 wwpn;
- size_t lsize; /* LUN size in number of LBAs */
- size_t lba_size; /* LBA size in number of bytes */
- size_t au_size; /* Allocation Unit size in number of LBAs */
- struct ba_lun_info *ba_lun_handle;
-};
-
-/* Block Allocator */
-struct blka {
- struct ba_lun ba_lun;
- u64 nchunk; /* number of chunks */
- struct mutex mutex;
-};
-
-#endif /* ifndef _CXLFLASH_SUPERPIPE_H */
diff --git a/include/uapi/scsi/cxlflash_ioctl.h b/include/uapi/scsi/cxlflash_ioctl.h
deleted file mode 100644
index 513da47aa5ab..000000000000
--- a/include/uapi/scsi/cxlflash_ioctl.h
+++ /dev/null
@@ -1,276 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- * Matthew R. Ochs <mrochs@xxxxxxxxxxxxxxxxxx>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _CXLFLASH_IOCTL_H
-#define _CXLFLASH_IOCTL_H
-
-#include <linux/types.h>
-
-/*
- * Structure and definitions for all CXL Flash ioctls
- */
-#define CXLFLASH_WWID_LEN 16
-
-/*
- * Structure and flag definitions CXL Flash superpipe ioctls
- */
-
-#define DK_CXLFLASH_VERSION_0 0
-
-struct dk_cxlflash_hdr {
- __u16 version; /* Version data */
- __u16 rsvd[3]; /* Reserved for future use */
- __u64 flags; /* Input flags */
- __u64 return_flags; /* Returned flags */
-};
-
-/*
- * Return flag definitions available to all superpipe ioctls
- *
- * Similar to the input flags, these are grown from the bottom-up with the
- * intention that ioctl-specific return flag definitions would grow from the
- * top-down, allowing the two sets to co-exist. While not required/enforced
- * at this time, this provides future flexibility.
- */
-#define DK_CXLFLASH_ALL_PORTS_ACTIVE 0x0000000000000001ULL
-#define DK_CXLFLASH_APP_CLOSE_ADAP_FD 0x0000000000000002ULL
-#define DK_CXLFLASH_CONTEXT_SQ_CMD_MODE 0x0000000000000004ULL
-
-/*
- * General Notes:
- * -------------
- * The 'context_id' field of all ioctl structures contains the context
- * identifier for a context in the lower 32-bits (upper 32-bits are not
- * to be used when identifying a context to the AFU). That said, the value
- * in its entirety (all 64-bits) is to be treated as an opaque cookie and
- * should be presented as such when issuing ioctls.
- */
-
-/*
- * DK_CXLFLASH_ATTACH Notes:
- * ------------------------
- * Read/write access permissions are specified via the O_RDONLY, O_WRONLY,
- * and O_RDWR flags defined in the fcntl.h header file.
- *
- * A valid adapter file descriptor (fd >= 0) is only returned on the initial
- * attach (successful) of a context. When a context is shared(reused), the user
- * is expected to already 'know' the adapter file descriptor associated with the
- * context.
- */
-#define DK_CXLFLASH_ATTACH_REUSE_CONTEXT 0x8000000000000000ULL
-
-struct dk_cxlflash_attach {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 num_interrupts; /* Requested number of interrupts */
- __u64 context_id; /* Returned context */
- __u64 mmio_size; /* Returned size of MMIO area */
- __u64 block_size; /* Returned block size, in bytes */
- __u64 adap_fd; /* Returned adapter file descriptor */
- __u64 last_lba; /* Returned last LBA on the device */
- __u64 max_xfer; /* Returned max transfer size, blocks */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-struct dk_cxlflash_detach {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 context_id; /* Context to detach */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-struct dk_cxlflash_udirect {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 context_id; /* Context to own physical resources */
- __u64 rsrc_handle; /* Returned resource handle */
- __u64 last_lba; /* Returned last LBA on the device */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-#define DK_CXLFLASH_UVIRTUAL_NEED_WRITE_SAME 0x8000000000000000ULL
-
-struct dk_cxlflash_uvirtual {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 context_id; /* Context to own virtual resources */
- __u64 lun_size; /* Requested size, in 4K blocks */
- __u64 rsrc_handle; /* Returned resource handle */
- __u64 last_lba; /* Returned last LBA of LUN */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-struct dk_cxlflash_release {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 context_id; /* Context owning resources */
- __u64 rsrc_handle; /* Resource handle to release */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-struct dk_cxlflash_resize {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 context_id; /* Context owning resources */
- __u64 rsrc_handle; /* Resource handle of LUN to resize */
- __u64 req_size; /* New requested size, in 4K blocks */
- __u64 last_lba; /* Returned last LBA of LUN */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-struct dk_cxlflash_clone {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 context_id_src; /* Context to clone from */
- __u64 context_id_dst; /* Context to clone to */
- __u64 adap_fd_src; /* Source context adapter fd */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-#define DK_CXLFLASH_VERIFY_SENSE_LEN 18
-#define DK_CXLFLASH_VERIFY_HINT_SENSE 0x8000000000000000ULL
-
-struct dk_cxlflash_verify {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 context_id; /* Context owning resources to verify */
- __u64 rsrc_handle; /* Resource handle of LUN */
- __u64 hint; /* Reasons for verify */
- __u64 last_lba; /* Returned last LBA of device */
- __u8 sense_data[DK_CXLFLASH_VERIFY_SENSE_LEN]; /* SCSI sense data */
- __u8 pad[6]; /* Pad to next 8-byte boundary */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-#define DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET 0x8000000000000000ULL
-
-struct dk_cxlflash_recover_afu {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u64 reason; /* Reason for recovery request */
- __u64 context_id; /* Context to recover / updated ID */
- __u64 mmio_size; /* Returned size of MMIO area */
- __u64 adap_fd; /* Returned adapter file descriptor */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-#define DK_CXLFLASH_MANAGE_LUN_WWID_LEN CXLFLASH_WWID_LEN
-#define DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE 0x8000000000000000ULL
-#define DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE 0x4000000000000000ULL
-#define DK_CXLFLASH_MANAGE_LUN_ALL_PORTS_ACCESSIBLE 0x2000000000000000ULL
-
-struct dk_cxlflash_manage_lun {
- struct dk_cxlflash_hdr hdr; /* Common fields */
- __u8 wwid[DK_CXLFLASH_MANAGE_LUN_WWID_LEN]; /* Page83 WWID, NAA-6 */
- __u64 reserved[8]; /* Rsvd, future use */
-};
-
-union cxlflash_ioctls {
- struct dk_cxlflash_attach attach;
- struct dk_cxlflash_detach detach;
- struct dk_cxlflash_udirect udirect;
- struct dk_cxlflash_uvirtual uvirtual;
- struct dk_cxlflash_release release;
- struct dk_cxlflash_resize resize;
- struct dk_cxlflash_clone clone;
- struct dk_cxlflash_verify verify;
- struct dk_cxlflash_recover_afu recover_afu;
- struct dk_cxlflash_manage_lun manage_lun;
-};
-
-#define MAX_CXLFLASH_IOCTL_SZ (sizeof(union cxlflash_ioctls))
-
-#define CXL_MAGIC 0xCA
-#define CXL_IOWR(_n, _s) _IOWR(CXL_MAGIC, _n, struct _s)
-
-/*
- * CXL Flash superpipe ioctls start at base of the reserved CXL_MAGIC
- * region (0x80) and grow upwards.
- */
-#define DK_CXLFLASH_ATTACH CXL_IOWR(0x80, dk_cxlflash_attach)
-#define DK_CXLFLASH_USER_DIRECT CXL_IOWR(0x81, dk_cxlflash_udirect)
-#define DK_CXLFLASH_RELEASE CXL_IOWR(0x82, dk_cxlflash_release)
-#define DK_CXLFLASH_DETACH CXL_IOWR(0x83, dk_cxlflash_detach)
-#define DK_CXLFLASH_VERIFY CXL_IOWR(0x84, dk_cxlflash_verify)
-#define DK_CXLFLASH_RECOVER_AFU CXL_IOWR(0x85, dk_cxlflash_recover_afu)
-#define DK_CXLFLASH_MANAGE_LUN CXL_IOWR(0x86, dk_cxlflash_manage_lun)
-#define DK_CXLFLASH_USER_VIRTUAL CXL_IOWR(0x87, dk_cxlflash_uvirtual)
-#define DK_CXLFLASH_VLUN_RESIZE CXL_IOWR(0x88, dk_cxlflash_resize)
-#define DK_CXLFLASH_VLUN_CLONE CXL_IOWR(0x89, dk_cxlflash_clone)
-
-/*
- * Structure and flag definitions CXL Flash host ioctls
- */
-
-#define HT_CXLFLASH_VERSION_0 0
-
-struct ht_cxlflash_hdr {
- __u16 version; /* Version data */
- __u16 subcmd; /* Sub-command */
- __u16 rsvd[2]; /* Reserved for future use */
- __u64 flags; /* Input flags */
- __u64 return_flags; /* Returned flags */
-};
-
-/*
- * Input flag definitions available to all host ioctls
- *
- * These are grown from the bottom-up with the intention that ioctl-specific
- * input flag definitions would grow from the top-down, allowing the two sets
- * to co-exist. While not required/enforced at this time, this provides future
- * flexibility.
- */
-#define HT_CXLFLASH_HOST_READ 0x0000000000000000ULL
-#define HT_CXLFLASH_HOST_WRITE 0x0000000000000001ULL
-
-#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_CREATE_LUN 0x0001
-#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_DELETE_LUN 0x0002
-#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_QUERY_PORT 0x0003
-
-struct ht_cxlflash_lun_provision {
- struct ht_cxlflash_hdr hdr; /* Common fields */
- __u16 port; /* Target port for provision request */
- __u16 reserved16[3]; /* Reserved for future use */
- __u64 size; /* Size of LUN (4K blocks) */
- __u64 lun_id; /* SCSI LUN ID */
- __u8 wwid[CXLFLASH_WWID_LEN];/* Page83 WWID, NAA-6 */
- __u64 max_num_luns; /* Maximum number of LUNs provisioned */
- __u64 cur_num_luns; /* Current number of LUNs provisioned */
- __u64 max_cap_port; /* Total capacity for port (4K blocks) */
- __u64 cur_cap_port; /* Current capacity for port (4K blocks) */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-#define HT_CXLFLASH_AFU_DEBUG_MAX_DATA_LEN 262144 /* 256K */
-#define HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN 12
-struct ht_cxlflash_afu_debug {
- struct ht_cxlflash_hdr hdr; /* Common fields */
- __u8 reserved8[4]; /* Reserved for future use */
- __u8 afu_subcmd[HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN]; /* AFU subcommand,
- * (pass through)
- */
- __u64 data_ea; /* Data buffer effective address */
- __u32 data_len; /* Data buffer length */
- __u32 reserved32; /* Reserved for future use */
- __u64 reserved[8]; /* Reserved for future use */
-};
-
-union cxlflash_ht_ioctls {
- struct ht_cxlflash_lun_provision lun_provision;
- struct ht_cxlflash_afu_debug afu_debug;
-};
-
-#define MAX_HT_CXLFLASH_IOCTL_SZ (sizeof(union cxlflash_ht_ioctls))
-
-/*
- * CXL Flash host ioctls start at the top of the reserved CXL_MAGIC
- * region (0xBF) and grow downwards.
- */
-#define HT_CXLFLASH_LUN_PROVISION CXL_IOWR(0xBF, ht_cxlflash_lun_provision)
-#define HT_CXLFLASH_AFU_DEBUG CXL_IOWR(0xBE, ht_cxlflash_afu_debug)
-
-
-#endif /* ifndef _CXLFLASH_IOCTL_H */
diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
index 8eb6aa606a0d..3ef652da7758 100644
--- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
+++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
@@ -26,13 +26,12 @@ static const char *const known_fs[] = {
"hfsplus", "hostfs", "hpfs", "hugetlbfs", "ibmasmfs", "iomem",
"ipathfs", "iso9660", "jffs2", "jfs", "minix", "mqueue", "msdos",
"nfs", "nfs4", "nfsd", "nilfs2", "nsfs", "ntfs", "ntfs3", "ocfs2",
- "ocfs2_dlmfs", "ocxlflash", "omfs", "openpromfs", "overlay", "pipefs",
- "proc", "pstore", "pvfs2", "qnx4", "qnx6", "ramfs",
- "resctrl", "romfs", "rootfs", "rpc_pipefs", "s390_hypfs", "secretmem",
- "securityfs", "selinuxfs", "smackfs", "smb3", "sockfs", "spufs",
- "squashfs", "sysfs", "sysv", "tmpfs", "tracefs", "ubifs", "udf",
- "ufs", "v7", "vboxsf", "vfat", "virtiofs", "vxfs", "xenfs", "xfs",
- "zonefs", NULL };
+ "ocfs2_dlmfs", "omfs", "openpromfs", "overlay", "pipefs", "proc",
+ "pstore", "pvfs2", "qnx4", "qnx6", "ramfs", "resctrl", "romfs",
+ "rootfs", "rpc_pipefs", "s390_hypfs", "secretmem", "securityfs",
+ "selinuxfs", "smackfs", "smb3", "sockfs", "spufs", "squashfs", "sysfs",
+ "sysv", "tmpfs", "tracefs", "ubifs", "udf", "ufs", "v7", "vboxsf",
+ "vfat", "virtiofs", "vxfs", "xenfs", "xfs", "zonefs", NULL };
static struct statmount *statmount_alloc(uint64_t mnt_id, uint64_t mask, unsigned int flags)
{
