The virthba module provides access to a shared SCSI host bus adapter
and one or more disk devices, by proxying SCSI commands between the
guest and the service partition that owns the shared SCSI adapter,
using a channel between the guest and the service partition. The disks
that appear on the shared bus are defined by the s-Par configuration
and enforced by the service partition, while the guest driver handles
sending commands and handling responses. Each disk is shared as a
whole to a guest. Sharing the bus adapter in this way provides
resiliency; should the device encounter an error, only the service
partition is rebooted, and the device is reinitialized. This allows
guests to continue running and to recover from the error.
Signed-off-by: Ken Cox <jkc@xxxxxxxxxx>
Cc: Ben Romer <sparmaintainer@xxxxxxxxxx>
Index: linux-2.6.staging/drivers/staging/unisys/Kconfig
===================================================================
--- linux-2.6.staging.orig/drivers/staging/unisys/Kconfig
+++ linux-2.6.staging/drivers/staging/unisys/Kconfig
@@ -15,5 +15,6 @@ source "drivers/staging/unisys/visorchip
source "drivers/staging/unisys/channels/Kconfig"
source "drivers/staging/unisys/uislib/Kconfig"
source "drivers/staging/unisys/virtpci/Kconfig"
+source "drivers/staging/unisys/virthba/Kconfig"
endif # UNISYSSPAR
Index: linux-2.6.staging/drivers/staging/unisys/Makefile
===================================================================
--- linux-2.6.staging.orig/drivers/staging/unisys/Makefile
+++ linux-2.6.staging/drivers/staging/unisys/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_UNISYS_VISORCHIPSET) += vis
obj-$(CONFIG_UNISYS_CHANNELSTUB) += channels/
obj-$(CONFIG_UNISYS_UISLIB) += uislib/
obj-$(CONFIG_UNISYS_VIRTPCI) += virtpci/
+obj-$(CONFIG_UNISYS_VIRTHBA) += virthba/
Index: linux-2.6.staging/drivers/staging/unisys/virthba/Kconfig
===================================================================
--- /dev/null
+++ linux-2.6.staging/drivers/staging/unisys/virthba/Kconfig
@@ -0,0 +1,10 @@
+#
+# Unisys virthba configuration
+#
+
+config UNISYS_VIRTHBA
+ tristate "Unisys virthba driver"
+ depends on UNISYSSPAR && UNISYS_VISORCHIPSET && UNISYS_CHANNELSTUB && UNISYS_UISLIB && UNISYS_VIRTPCI
+ ---help---
+ If you say Y here, you will enable the Unisys virthba driver.
+
Index: linux-2.6.staging/drivers/staging/unisys/virthba/Makefile
===================================================================
--- /dev/null
+++ linux-2.6.staging/drivers/staging/unisys/virthba/Makefile
@@ -0,0 +1,16 @@
+#
+# Makefile for Unisys virthba
+#
+
+obj-$(CONFIG_UNISYS_VIRTHBA) += virthba.o
+
+ccflags-y += -Idrivers/staging/unisys/include
+ccflags-y += -Idrivers/staging/unisys/uislib
+ccflags-y += -Idrivers/staging/unisys/timskmod
+ccflags-y += -Idrivers/staging/unisys/visorchipset
+ccflags-y += -Idrivers/staging/unisys/virtpci
+ccflags-y += -Idrivers/staging/unisys/common-spar/include
+ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels
+
+ccflags-y += -DCONFIG_SPAR_GUEST -DGUESTDRIVERBUILD -DNOAUTOVERSION
+
Index: linux-2.6.staging/drivers/staging/unisys/virthba/virthba.c
===================================================================
--- /dev/null
+++ linux-2.6.staging/drivers/staging/unisys/virthba/virthba.c
@@ -0,0 +1,1813 @@
+/* virthba.c
+ *
+ * Copyright © 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+#define EXPORT_SYMTAB
+
+/* if you want to turn on some debugging of write device data or read
+ * device data, define these two undefs. You will probably want to
+ * customize the code which is here since it was written assuming
+ * reading and writing a specific data file df.64M.txt which is a
+ * 64Megabyte file created by Art Nilson using a scritp I wrote called
+ * cr_test_data.pl. The data file consists of 256 byte lines of text
+ * which start with an 8 digit sequence number, a colon, and then
+ * letters after that */
+
+#undef DBGINF
+
+#include <linux/kernel.h>
+#ifdef CONFIG_MODVERSIONS
+#include <config/modversions.h>
+#endif
+
+#include "uniklog.h"
+#include "diagnostics/appos_subsystems.h"
+#include "uisutils.h"
+#include "uisqueue.h"
+#include "uisthread.h"
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <asm/param.h>
+#include <linux/proc_fs.h>
+#include <linux/types.h>
+
+#include "virthba.h"
+#include "virtpci.h"
+#include "visorchipset.h"
+#include "version.h"
+#include "guestlinuxdebug.h"
+/* this is shorter than using __FILE__ (full path name) in
+ * debug/info/error messages
+ */
+#define CURRENT_FILE_PC VIRT_HBA_PC_virthba_c
+#define __MYFILE__ "virthba.c"
+
+/* NOTE: L1_CACHE_BYTES >=128 */
+#define DEVICE_ATTRIBUTE struct device_attribute
+
+/*****************************************************/
+/* Forward declarations */
+/*****************************************************/
+static int virthba_probe(struct virtpci_dev *dev,
+ const struct pci_device_id *id);
+static void virthba_remove(struct virtpci_dev *dev);
+static int virthba_abort_handler(struct scsi_cmnd *scsicmd);
+static int virthba_bus_reset_handler(struct scsi_cmnd *scsicmd);
+static int virthba_device_reset_handler(struct scsi_cmnd *scsicmd);
+static int virthba_host_reset_handler(struct scsi_cmnd *scsicmd);
+static const char *virthba_get_info(struct Scsi_Host *shp);
+static int virthba_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
+static int virthba_queue_command_lck(struct scsi_cmnd *scsicmd,
+ void (*virthba_cmnd_done)(struct scsi_cmnd *));
+#ifdef DEF_SCSI_QCMD
+DEF_SCSI_QCMD(virthba_queue_command)
+#else
+#define virthba_queue_command virthba_queue_command_lck
+#endif
+static int virthba_slave_alloc(struct scsi_device *scsidev);
+static int virthba_slave_configure(struct scsi_device *scsidev);
+static void virthba_slave_destroy(struct scsi_device *scsidev);
+static int process_incoming_rsps(void *);
+static int virthba_serverup(struct virtpci_dev *virtpcidev);
+static int virthba_serverdown(struct virtpci_dev *virtpcidev, u32 state);
+static void doDiskAddRemove(struct work_struct *work);
+static void virthba_serverdown_complete(struct work_struct *work);
+
+static ssize_t info_proc_read(struct file *file, char __user *buf,
+ size_t len, loff_t *offset);
+static ssize_t rqwu_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos);
+static ssize_t enable_ints_read(struct file *file, char __user *buffer,
+ size_t count, loff_t *ppos);
+static ssize_t enable_ints_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos);
+
+/*****************************************************/
+/* Globals */
+/*****************************************************/
+
+int rsltq_wait_usecs = 4000; /* Default 4ms */
+static unsigned int MaxBuffLen;
+
+/* Module options */
+char *virthba_options = "NONE";
+
+static const struct pci_device_id virthba_id_table[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_UNISYS, PCI_DEVICE_ID_VIRTHBA)},
+ {0},
+};
+
+/* export virthba_id_table */
+MODULE_DEVICE_TABLE(pci, virthba_id_table);
+
+static struct workqueue_struct *virthba_serverdown_workqueue;
+
+static struct virtpci_driver virthba_driver = {
+ .name = "uisvirthba",
+ .version = VERSION,
+ .vertag = NULL,
+ .build_date = __DATE__,
+ .build_time = __TIME__,
+ .id_table = virthba_id_table,
+ .probe = virthba_probe,
+ .remove = virthba_remove,
+ .resume = virthba_serverup,
+ .suspend = virthba_serverdown
+};
+
+/* The Send and Recive Buffers of the IO Queue may both be full */
+#define MAX_PENDING_REQUESTS (MIN_NUMSIGNALS*2)
+#define INTERRUPT_VECTOR_MASK 0x3F
+
+struct scsipending {
+ char cmdtype; /* Type of pointer that is being stored */
+ void *sent; /* The Data being tracked */
+ /* struct scsi_cmnd *type for virthba_queue_command */
+ /* struct uiscmdrsp *type for management commands */
+};
+
+#define VIRTHBA_ERROR_COUNT 30
+#define IOS_ERROR_THRESHOLD 1000
+struct virtdisk_info {
+ U32 valid;
+ U32 channel, id, lun; /* Disk Path */
+ atomic_t ios_threshold;
+ atomic_t error_count;
+ struct virtdisk_info *next;
+};
+/* Each Scsi_Host has a host_data area that contains this struct. */
+struct virthba_info {
+ struct Scsi_Host *scsihost;
+ struct virtpci_dev *virtpcidev;
+ struct list_head dev_info_list;
+ struct chaninfo chinfo;
+ struct InterruptInfo intr; /* use recvInterrupt info to receive
+ interrupts when IOs complete */
+ int interrupt_vector;
+ struct scsipending pending[MAX_PENDING_REQUESTS]; /* Tracks the requests
+ that have been */
+ /* forwarded to the IOVM and haven't returned yet */
+ unsigned int nextinsert; /* Start search for next pending
+ free slot here */
+ spinlock_t privlock;
+ bool serverdown;
+ bool serverchangingstate;
+ unsigned long long acquire_failed_cnt;
+ unsigned long long interrupts_rcvd;
+ unsigned long long interrupts_notme;
+ unsigned long long interrupts_disabled;
+ struct work_struct serverdown_completion;
+ U64 *flags_addr;
+ atomic_t interrupt_rcvd;
+ wait_queue_head_t rsp_queue;
+ struct virtdisk_info head;
+};
+
+/* Work Data for DARWorkQ */
+struct diskaddremove {
+ U8 add; /* 0-remove, 1-add */
+ struct Scsi_Host *shost; /* Scsi Host for this virthba instance */
+ U32 channel, id, lun; /* Disk Path */
+ struct diskaddremove *next;
+};
+
+#define virtpci_dev_to_virthba_virthba_get_info(d) \
+ container_of(d, struct virthba_info, virtpcidev)
+
+static DEVICE_ATTRIBUTE *virthba_shost_attrs[];
+static struct scsi_host_template virthba_driver_template = {
+ .name = "Unisys Virtual HBA",
+ .proc_name = "uisvirthba",
+ .info = virthba_get_info,
+ .ioctl = virthba_ioctl,
+ .queuecommand = virthba_queue_command,
+ .eh_abort_handler = virthba_abort_handler,
+ .eh_device_reset_handler = virthba_device_reset_handler,
+ .eh_bus_reset_handler = virthba_bus_reset_handler,
+ .eh_host_reset_handler = virthba_host_reset_handler,
+ .shost_attrs = virthba_shost_attrs,
+
+#define VIRTHBA_MAX_CMNDS 128
+ .can_queue = VIRTHBA_MAX_CMNDS,
+ .sg_tablesize = 64, /* largest number of address/length pairs */
+ .this_id = -1,
+ .slave_alloc = virthba_slave_alloc,
+ .slave_configure = virthba_slave_configure,
+ .slave_destroy = virthba_slave_destroy,
+ .use_clustering = ENABLE_CLUSTERING,
+};
+
+struct virthba_devices_open {
+ struct virthba_info *virthbainfo;
+};
+
+static const struct file_operations proc_info_fops = {
+ .read = info_proc_read,
+};
+
+static const struct file_operations proc_rqwu_fops = {
+ .write = rqwu_proc_write,
+};
+
+static const struct file_operations proc_enable_ints_fops = {
+ .read = enable_ints_read,
+ .write = enable_ints_write,
+};
+
+
+#define VIRTHBASOPENMAX 1
+/* array of open devices maintained by open() and close(); */
+static struct virthba_devices_open VirtHbasOpen[VIRTHBASOPENMAX];
+static struct proc_dir_entry *virthba_proc_dir;
+static struct proc_dir_entry *info_proc_entry;
+static struct proc_dir_entry *rqwaitus_proc_entry;
+static struct proc_dir_entry *enable_ints_proc_entry;
+#define INFO_PROC_ENTRY_FN "info"
+#define ENABLE_INTS_ENTRY_FN "enable_ints"
+#define RQWU_PROC_ENTRY_FN "rqwait_usecs"
+#define DIR_PROC_ENTRY "virthba"
+
+/*****************************************************/
+/* Local Functions */
+/*****************************************************/
+static int
+add_scsipending_entry(struct virthba_info *vhbainfo, char cmdtype, void *new)
+{
+ unsigned long flags;
+ int insert_location;
+
+ spin_lock_irqsave(&vhbainfo->privlock, flags);
+ insert_location = vhbainfo->nextinsert;
+ while (vhbainfo->pending[insert_location].sent != NULL) {
+ insert_location = (insert_location + 1) % MAX_PENDING_REQUESTS;
+ if (insert_location == (int) vhbainfo->nextinsert) {
+ LOGERR("Queue should be full. insert_location<<%d>> Unable to find open slot for pending commands.\n",
+ insert_location);
+ spin_unlock_irqrestore(&vhbainfo->privlock, flags);
+ return -1;
+ }
+ }
+
+ vhbainfo->pending[insert_location].cmdtype = cmdtype;
+ vhbainfo->pending[insert_location].sent = new;
+ vhbainfo->nextinsert = (insert_location + 1) % MAX_PENDING_REQUESTS;
+ spin_unlock_irqrestore(&vhbainfo->privlock, flags);
+
+ return insert_location;
+}
+
+static unsigned int
+add_scsipending_entry_with_wait(struct virthba_info *vhbainfo, char cmdtype,
+ void *new)
+{
+ int insert_location = add_scsipending_entry(vhbainfo, cmdtype, new);
+
+ while (insert_location == -1) {
+ LOGERR("Failed to find empty queue slot. Waiting to try again\n");
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(msecs_to_jiffies(10));
+ insert_location = add_scsipending_entry(vhbainfo, cmdtype, new);
+ }
+
+ return (unsigned int) insert_location;
+}
+
+static void *
+del_scsipending_entry(struct virthba_info *vhbainfo, uintptr_t del)
+{
+ unsigned long flags;
+ void *sent = NULL;
+
+ if (del >= MAX_PENDING_REQUESTS) {
+ LOGERR("Invalid queue position <<%lu>> given to delete. MAX_PENDING_REQUESTS <<%d>>\n",
+ (unsigned long) del, MAX_PENDING_REQUESTS);
+ } else {
+ spin_lock_irqsave(&vhbainfo->privlock, flags);
+
+ if (vhbainfo->pending[del].sent == NULL)
+ LOGERR("Deleting already cleared queue entry at <<%lu>>.\n",
+ (unsigned long) del);
+
+ sent = vhbainfo->pending[del].sent;
+
+ vhbainfo->pending[del].cmdtype = 0;
+ vhbainfo->pending[del].sent = NULL;
+ spin_unlock_irqrestore(&vhbainfo->privlock, flags);
+ }
+
+ return sent;
+}
+
+/* DARWorkQ (Disk Add/Remove) */
+static struct work_struct DARWorkQ;
+struct diskaddremove *DARWorkQHead = NULL;
+spinlock_t DARWorkQLock;
+unsigned short DARWorkQSched = 0;
+#define QUEUE_DISKADDREMOVE(dar) { \
+ spin_lock_irqsave(&DARWorkQLock, flags); \
+ if (!DARWorkQHead) { \
+ DARWorkQHead = dar; \
+ dar->next = NULL; \
+ } \
+ else { \
+ dar->next = DARWorkQHead; \
+ DARWorkQHead = dar; \
+ } \
+ if (!DARWorkQSched) { \
+ schedule_work(&DARWorkQ); \
+ DARWorkQSched = 1; \
+ } \
+ spin_unlock_irqrestore(&DARWorkQLock, flags); \
+}
+
+static inline void
+SendDiskAddRemove(struct diskaddremove *dar)
+{
+ struct scsi_device *sdev;
+ int error;
+
+ sdev = scsi_device_lookup(dar->shost, dar->channel, dar->id, dar->lun);
+ if (sdev) {
+ if (!(dar->add))
+ scsi_remove_device(sdev);
+ } else if (dar->add) {
+ error =
+ scsi_add_device(dar->shost, dar->channel, dar->id,
+ dar->lun);
+ if (error)
+ LOGERR("Failed scsi_add_device: host_no=%d[chan=%d:id=%d:lun=%d]\n",
+ dar->shost->host_no, dar->channel, dar->id,
+ dar->lun);
+ } else
+ LOGERR("Failed scsi_device_lookup:[chan=%d:id=%d:lun=%d]\n",
+ dar->channel, dar->id, dar->lun);
+ kfree(dar);
+}
+
+/*****************************************************/
+/* DARWorkQ Handler Thread */
+/*****************************************************/
+static void
+doDiskAddRemove(struct work_struct *work)
+{
+ struct diskaddremove *dar;
+ struct diskaddremove *tmphead;
+ int i = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&DARWorkQLock, flags);
+ tmphead = DARWorkQHead;
+ DARWorkQHead = NULL;
+ DARWorkQSched = 0;
+ spin_unlock_irqrestore(&DARWorkQLock, flags);
+ while (tmphead) {
+ dar = tmphead;
+ tmphead = dar->next;
+ SendDiskAddRemove(dar);
+ i++;
+ }
+}
+
+/*****************************************************/
+/* Routine to add entry to DARWorkQ */
+/*****************************************************/
+static void
+process_disk_notify(struct Scsi_Host *shost, struct uiscmdrsp *cmdrsp)
+{
+ struct diskaddremove *dar;
+ unsigned long flags;
+
+ dar = kmalloc(sizeof(struct diskaddremove), GFP_ATOMIC);
+ if (dar) {
+ memset(dar, 0, sizeof(struct diskaddremove));
+ dar->add = cmdrsp->disknotify.add;
+ dar->shost = shost;
+ dar->channel = cmdrsp->disknotify.channel;
+ dar->id = cmdrsp->disknotify.id;
+ dar->lun = cmdrsp->disknotify.lun;
+ QUEUE_DISKADDREMOVE(dar);
+ } else {
+ LOGERR("kmalloc failed for dar. host_no=%d[chan=%d:id=%d:lun=%d]\n",
+ shost->host_no, cmdrsp->disknotify.channel,
+ cmdrsp->disknotify.id, cmdrsp->disknotify.lun);
+ }
+}
+
+/*****************************************************/
+/* Probe Remove Functions */
+/*****************************************************/
+irqreturn_t
+virthba_ISR(int irq, void *dev_id)
+{
+ struct virthba_info *virthbainfo = (struct virthba_info *) dev_id;
+ pCHANNEL_HEADER pChannelHeader;
+ pSIGNAL_QUEUE_HEADER pqhdr;
+ U64 mask;
+ unsigned long long rc1;
+
+ if (virthbainfo == NULL)
+ return IRQ_NONE;
+ virthbainfo->interrupts_rcvd++;
+ pChannelHeader = virthbainfo->chinfo.queueinfo->chan;
+ if (((pChannelHeader->Features
+ & ULTRA_IO_IOVM_IS_OK_WITH_DRIVER_DISABLING_INTS) != 0)
+ && ((pChannelHeader->Features & ULTRA_IO_DRIVER_DISABLES_INTS) !=
+ 0)) {
+ virthbainfo->interrupts_disabled++;
+ mask = ~ULTRA_CHANNEL_ENABLE_INTS;
+ rc1 = uisqueue_InterlockedAnd(virthbainfo->flags_addr, mask);
+ }
+ if (SignalQueueIsEmpty(pChannelHeader, IOCHAN_FROM_IOPART)) {
+ virthbainfo->interrupts_notme++;
+ return IRQ_NONE;
+ }
+ pqhdr = (pSIGNAL_QUEUE_HEADER) ((char *) pChannelHeader +
+ pChannelHeader->oChannelSpace) +
+ IOCHAN_FROM_IOPART;
+ pqhdr->NumInterruptsReceived++;
+ atomic_set(&virthbainfo->interrupt_rcvd, 1);
+ wake_up_interruptible(&virthbainfo->rsp_queue);
+ return IRQ_HANDLED;
+}
+
+static int
+virthba_probe(struct virtpci_dev *virtpcidev, const struct pci_device_id *id)
+{
+ int error;
+ struct Scsi_Host *scsihost;
+ struct virthba_info *virthbainfo;
+ int rsp;
+ int i;
+ irq_handler_t handler = virthba_ISR;
+ pCHANNEL_HEADER pChannelHeader;
+ pSIGNAL_QUEUE_HEADER pqhdr;
+ U64 mask;
+
+ LOGVER("entering virthba_probe...\n");
+ LOGVER("virtpcidev busNo<<%d>>devNo<<%d>>", virtpcidev->busNo,
+ virtpcidev->deviceNo);
+
+ LOGINF("entering virthba_probe...\n");
+ LOGINF("virtpcidev busNo<<%d>>devNo<<%d>>", virtpcidev->busNo,
+ virtpcidev->deviceNo);
+ POSTCODE_LINUX_2(VHBA_PROBE_ENTRY_PC, POSTCODE_SEVERITY_INFO);
+ /* call scsi_host_alloc to register a scsi host adapter
+ * instance - this virthba that has just been created is an
+ * instance of a scsi host adapter. This scsi_host_alloc
+ * function allocates a new Scsi_Host struct & performs basic
+ * initializatoin. The host is not published to the scsi
+ * midlayer until scsi_add_host is called.
+ */
+ DBGINF("calling scsi_host_alloc.\n");
+
+ /* arg 2 passed in length of extra space we want allocated
+ * with scsi_host struct for our own use scsi_host_alloc
+ * assign host_no
+ */
+ scsihost = scsi_host_alloc(&virthba_driver_template,
+ sizeof(struct virthba_info));
+ if (scsihost == NULL)
+ return -ENODEV;
+
+ DBGINF("scsihost: 0x%p, scsihost->this_id: %d, host_no: %d.\n",
+ scsihost, scsihost->this_id, scsihost->host_no);
+
+ scsihost->this_id = UIS_MAGIC_VHBA;
+ /* linux treats max-channel differently than max-id & max-lun.
+ * In the latter cases, those two values result in 0 to max-1
+ * (inclusive) being scanned. But in the case of channels, the
+ * scan is 0 to max (inclusive); so we will subtract one from
+ * the max-channel value.
+ */
+ LOGINF("virtpcidev->scsi.max.max_channel=%u, max_id=%u, max_lun=%u, cmd_per_lun=%u, max_io_size=%u\n",
+ (unsigned) virtpcidev->scsi.max.max_channel - 1,
+ (unsigned) virtpcidev->scsi.max.max_id,
+ (unsigned) virtpcidev->scsi.max.max_lun,
+ (unsigned) virtpcidev->scsi.max.cmd_per_lun,
+ (unsigned) virtpcidev->scsi.max.max_io_size);
+ scsihost->max_channel = (unsigned) virtpcidev->scsi.max.max_channel;
+ scsihost->max_id = (unsigned) virtpcidev->scsi.max.max_id;
+ scsihost->max_lun = (unsigned) virtpcidev->scsi.max.max_lun;
+ scsihost->cmd_per_lun = (unsigned) virtpcidev->scsi.max.cmd_per_lun;
+ scsihost->max_sectors =
+ (unsigned short) (virtpcidev->scsi.max.max_io_size >> 9);
+ scsihost->sg_tablesize =
+ (unsigned short) (virtpcidev->scsi.max.max_io_size / PAGE_SIZE);
+ if (scsihost->sg_tablesize > MAX_PHYS_INFO)
+ scsihost->sg_tablesize = MAX_PHYS_INFO;
+ LOGINF("scsihost->max_channel=%u, max_id=%u, max_lun=%u, cmd_per_lun=%u, max_sectors=%hu, sg_tablesize=%hu\n",
+ scsihost->max_channel, scsihost->max_id, scsihost->max_lun,
+ scsihost->cmd_per_lun, scsihost->max_sectors,
+ scsihost->sg_tablesize);
+ LOGINF("scsihost->can_queue=%u, scsihost->cmd_per_lun=%u, max_sectors=%hu, sg_tablesize=%hu\n",
+ scsihost->can_queue, scsihost->cmd_per_lun, scsihost->max_sectors,
+ scsihost->sg_tablesize);
+
+ DBGINF("calling scsi_add_host\n");
+
+ /* this creates "host%d" in sysfs. If 2nd argument is NULL,
+ * then this generic /sys/devices/platform/host? device is
+ * created and /sys/scsi_host/host? ->
+ * /sys/devices/platform/host? If 2nd argument is not NULL,
+ * then this generic /sys/devices/<path>/host? is created and
+ * host? points to that device instead.
+ */
+ error = scsi_add_host(scsihost, &virtpcidev->generic_dev);
+ if (error) {
+ LOGERR("scsi_add_host ****FAILED 0x%x TBD - RECOVER\n", error);
+ POSTCODE_LINUX_2(VHBA_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR);
+ /* decr refcount on scsihost which was incremented by
+ * scsi_add_host so the scsi_host gets deleted
+ */
+ scsi_host_put(scsihost);
+ return -ENODEV;
+ }
+
+ virthbainfo = (struct virthba_info *) scsihost->hostdata;
+ memset(virthbainfo, 0, sizeof(struct virthba_info));
+ for (i = 0; i < VIRTHBASOPENMAX; i++) {
+ if (VirtHbasOpen[i].virthbainfo == NULL) {
+ VirtHbasOpen[i].virthbainfo = virthbainfo;
+ break;
+ }
+ }
+ virthbainfo->interrupt_vector = -1;
+ virthbainfo->chinfo.queueinfo = &virtpcidev->queueinfo;
+ virthbainfo->virtpcidev = virtpcidev;
+ spin_lock_init(&virthbainfo->chinfo.insertlock);
+
+ DBGINF("generic_dev: 0x%p, queueinfo: 0x%p.\n",
+ &virtpcidev->generic_dev, &virtpcidev->queueinfo);
+
+ init_waitqueue_head(&virthbainfo->rsp_queue);
+ spin_lock_init(&virthbainfo->privlock);
+ memset(&virthbainfo->pending, 0, sizeof(virthbainfo->pending));
+ virthbainfo->serverdown = false;
+ virthbainfo->serverchangingstate = false;
+
+ virthbainfo->intr = virtpcidev->intr;
+ /* save of host within virthba_info */
+ virthbainfo->scsihost = scsihost;
+
+ /* save of host within virtpci_dev */
+ virtpcidev->scsi.scsihost = scsihost;
+
+ /* Setup workqueue for serverdown messages */
+ INIT_WORK(&virthbainfo->serverdown_completion,
+ virthba_serverdown_complete);
+
+ virthbainfo->chinfo.queueinfo->chan->Features |=
+ ULTRA_IO_CHANNEL_IS_POLLING;
+ /* start thread that will receive scsicmnd responses */
+ DBGINF("starting rsp thread -- queueinfo: 0x%p, threadinfo: 0x%p.\n",
+ virthbainfo->chinfo.queueinfo, &virthbainfo->chinfo.threadinfo);
+
+ pChannelHeader = virthbainfo->chinfo.queueinfo->chan;
+ pqhdr = (pSIGNAL_QUEUE_HEADER) ((char *) pChannelHeader +
+ pChannelHeader->oChannelSpace) +
+ IOCHAN_FROM_IOPART;
+ virthbainfo->flags_addr = &pqhdr->FeatureFlags;
+
+ if (!uisthread_start(&virthbainfo->chinfo.threadinfo,
+ process_incoming_rsps,
+ virthbainfo, "vhba_incoming")) {
+ LOGERR("uisthread_start rsp ****FAILED\n");
+ /* decr refcount on scsihost which was incremented by
+ * scsi_add_host so the scsi_host gets deleted
+ */
+ POSTCODE_LINUX_2(VHBA_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR);
+ scsi_host_put(scsihost);
+ return -ENODEV;
+ }
+ LOGINF("sendInterruptHandle=0x%16llX",
+ virthbainfo->intr.sendInterruptHandle);
+ LOGINF("recvInterruptHandle=0x%16llX",
+ virthbainfo->intr.recvInterruptHandle);
+ LOGINF("recvInterruptVector=0x%8X",
+ virthbainfo->intr.recvInterruptVector);
+ LOGINF("recvInterruptShared=0x%2X",
+ virthbainfo->intr.recvInterruptShared);
+ LOGINF("scsihost.hostt->name=%s", scsihost->hostt->name);
+ virthbainfo->interrupt_vector =
+ virthbainfo->intr.recvInterruptHandle & INTERRUPT_VECTOR_MASK;
+ rsp = request_irq(virthbainfo->interrupt_vector, handler, IRQF_SHARED,
+ scsihost->hostt->name, virthbainfo);
+ if (rsp != 0) {
+ LOGERR("request_irq(%d) uislib_virthba_ISR request failed with rsp=%d\n",
+ virthbainfo->interrupt_vector, rsp);
+ virthbainfo->interrupt_vector = -1;
+ POSTCODE_LINUX_2(VHBA_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR);
+ } else {
+ U64 *Features_addr =
+ &virthbainfo->chinfo.queueinfo->chan->Features;
+ LOGERR("request_irq(%d) uislib_virthba_ISR request succeeded\n",
+ virthbainfo->interrupt_vector);
+ mask = ~(ULTRA_IO_CHANNEL_IS_POLLING |
+ ULTRA_IO_DRIVER_DISABLES_INTS);
+ uisqueue_InterlockedAnd(Features_addr, mask);
+ mask = ULTRA_IO_DRIVER_ENABLES_INTS;
+ uisqueue_InterlockedOr(Features_addr, mask);
+ rsltq_wait_usecs = 4000000;
+ }
+
+ DBGINF("calling scsi_scan_host.\n");
+ scsi_scan_host(scsihost);
+ DBGINF("return from scsi_scan_host.\n");
+
+ LOGINF("virthba added scsihost:0x%p\n", scsihost);
+ POSTCODE_LINUX_2(VHBA_PROBE_EXIT_PC, POSTCODE_SEVERITY_INFO);
+ return 0;
+}
+
+static void
+virthba_remove(struct virtpci_dev *virtpcidev)
+{
+ struct virthba_info *virthbainfo;
+ struct Scsi_Host *scsihost =
+ (struct Scsi_Host *) virtpcidev->scsi.scsihost;
+
+ LOGINF("virtpcidev busNo<<%d>>devNo<<%d>>", virtpcidev->busNo,
+ virtpcidev->deviceNo);
+ virthbainfo = (struct virthba_info *) scsihost->hostdata;
+ if (virthbainfo->interrupt_vector != -1)
+ free_irq(virthbainfo->interrupt_vector, virthbainfo);
+ LOGINF("Removing virtpcidev: 0x%p, virthbainfo: 0x%p\n", virtpcidev,
+ virthbainfo);
+
+ DBGINF("removing scsihost: 0x%p, scsihost->this_id: %d\n", scsihost,
+ scsihost->this_id);
+ scsi_remove_host(scsihost);
+
+ DBGINF("stopping thread.\n");
+ uisthread_stop(&virthbainfo->chinfo.threadinfo);
+
+ DBGINF("calling scsi_host_put\n");
+
+ /* decr refcount on scsihost which was incremented by
+ * scsi_add_host so the scsi_host gets deleted
+ */
+ scsi_host_put(scsihost);
+ LOGINF("virthba removed scsi_host.\n");
+}
+
+static int
+forward_vdiskmgmt_command(VDISK_MGMT_TYPES vdiskcmdtype,
+ struct Scsi_Host *scsihost,
+ struct uisscsi_dest *vdest)
+{
+ struct uiscmdrsp *cmdrsp;
+ struct virthba_info *virthbainfo =
+ (struct virthba_info *) scsihost->hostdata;
+ int notifyresult = 0xffff;
+ wait_queue_head_t notifyevent;
+
+ LOGINF("vDiskMgmt:%d %d:%d:%d\n", vdiskcmdtype,
+ vdest->channel, vdest->id, vdest->lun);
+
+ if (virthbainfo->serverdown || virthbainfo->serverchangingstate) {
+ DBGINF("Server is down/changing state. Returning Failure.\n");
+ return FAILED;
+ }
+
+ ALLOC_CMDRSP(cmdrsp);
+ if (cmdrsp == NULL) {
+ LOGERR("kmalloc of cmdrsp failed.\n");
+ return FAILED; /* reject */
+ }
+
+ init_waitqueue_head(¬ifyevent);
+
+ /* issue VDISK_MGMT_CMD
+ * set type to command - as opposed to task mgmt
+ */
+ cmdrsp->cmdtype = CMD_VDISKMGMT_TYPE;
+ /* specify the event that has to be triggered when this cmd is
+ * complete
+ */
+ cmdrsp->vdiskmgmt.notify = (void *) ¬ifyevent;
+ cmdrsp->vdiskmgmt.notifyresult = (void *) ¬ifyresult;
+
+ /* save destination */
+ cmdrsp->vdiskmgmt.vdisktype = vdiskcmdtype;
+ cmdrsp->vdiskmgmt.vdest.channel = vdest->channel;
+ cmdrsp->vdiskmgmt.vdest.id = vdest->id;
+ cmdrsp->vdiskmgmt.vdest.lun = vdest->lun;
+ cmdrsp->vdiskmgmt.scsicmd =
+ (void *) (uintptr_t)
+ add_scsipending_entry_with_wait(virthbainfo, CMD_VDISKMGMT_TYPE,
+ (void *) cmdrsp);
+
+ uisqueue_put_cmdrsp_with_lock_client(virthbainfo->chinfo.queueinfo,
+ cmdrsp, IOCHAN_TO_IOPART,
+ &virthbainfo->chinfo.insertlock,
+ DONT_ISSUE_INTERRUPT, (U64) NULL,
+ OK_TO_WAIT, "vhba");
+ LOGINF("VdiskMgmt waiting on event notifyevent=0x%p\n",
+ cmdrsp->scsitaskmgmt.notify);
+ wait_event(notifyevent, notifyresult != 0xffff);
+ LOGINF("VdiskMgmt complete; result:%d\n", cmdrsp->vdiskmgmt.result);
+ kfree(cmdrsp);
+ return SUCCESS;
+}
+
+/*****************************************************/
+/* Scsi Host support functions */
+/*****************************************************/
+
+static int
+forward_taskmgmt_command(TASK_MGMT_TYPES tasktype, struct scsi_device *scsidev)
+{
+ struct uiscmdrsp *cmdrsp;
+ struct virthba_info *virthbainfo =
+ (struct virthba_info *) scsidev->host->hostdata;
+ int notifyresult = 0xffff;
+ wait_queue_head_t notifyevent;
+
+ LOGINF("TaskMgmt:%d %d:%d:%d\n", tasktype,
+ scsidev->channel, scsidev->id, scsidev->lun);
+
+ if (virthbainfo->serverdown || virthbainfo->serverchangingstate) {
+ DBGINF("Server is down/changing state. Returning Failure.\n");
+ return FAILED;
+ }
+
+ ALLOC_CMDRSP(cmdrsp);
+ if (cmdrsp == NULL) {
+ LOGERR("kmalloc of cmdrsp failed.\n");
+ return FAILED; /* reject */
+ }
+
+ init_waitqueue_head(¬ifyevent);
+
+ /* issue TASK_MGMT_ABORT_TASK */
+ /* set type to command - as opposed to task mgmt */
+ cmdrsp->cmdtype = CMD_SCSITASKMGMT_TYPE;
+ /* specify the event that has to be triggered when this */
+ /* cmd is complete */
+ cmdrsp->scsitaskmgmt.notify = (void *) ¬ifyevent;
+ cmdrsp->scsitaskmgmt.notifyresult = (void *) ¬ifyresult;
+
+ /* save destination */
+ cmdrsp->scsitaskmgmt.tasktype = tasktype;
+ cmdrsp->scsitaskmgmt.vdest.channel = scsidev->channel;
+ cmdrsp->scsitaskmgmt.vdest.id = scsidev->id;
+ cmdrsp->scsitaskmgmt.vdest.lun = scsidev->lun;
+ cmdrsp->scsitaskmgmt.scsicmd =
+ (void *) (uintptr_t)
+ add_scsipending_entry_with_wait(virthbainfo,
+ CMD_SCSITASKMGMT_TYPE,
+ (void *) cmdrsp);
+
+ uisqueue_put_cmdrsp_with_lock_client(virthbainfo->chinfo.queueinfo,
+ cmdrsp, IOCHAN_TO_IOPART,
+ &virthbainfo->chinfo.insertlock,
+ DONT_ISSUE_INTERRUPT, (U64) NULL,
+ OK_TO_WAIT, "vhba");
+ LOGINF("TaskMgmt waiting on event notifyevent=0x%p\n",
+ cmdrsp->scsitaskmgmt.notify);
+ wait_event(notifyevent, notifyresult != 0xffff);
+ LOGINF("TaskMgmt complete; result:%d\n", cmdrsp->scsitaskmgmt.result);
+ kfree(cmdrsp);
+ return SUCCESS;
+}
+
+/* The abort handler returns SUCCESS if it has succeeded to make LLDD
+ * and all related hardware forget about the scmd.
+ */
+static int
+virthba_abort_handler(struct scsi_cmnd *scsicmd)
+{
+ /* issue TASK_MGMT_ABORT_TASK */
+ struct scsi_device *scsidev;
+ struct virtdisk_info *vdisk;
+
+ scsidev = scsicmd->device;
+ for (vdisk = &((struct virthba_info *) scsidev->host->hostdata)->head;
+ vdisk->next; vdisk = vdisk->next) {
+ if ((scsidev->channel == vdisk->channel)
+ && (scsidev->id == vdisk->id)
+ && (scsidev->lun == vdisk->lun)) {
+ if (atomic_read(&vdisk->error_count) <
+ VIRTHBA_ERROR_COUNT) {
+ atomic_inc(&vdisk->error_count);
+ POSTCODE_LINUX_2(VHBA_COMMAND_HANDLER_PC,
+ POSTCODE_SEVERITY_INFO);
+ } else
+ atomic_set(&vdisk->ios_threshold,
+ IOS_ERROR_THRESHOLD);
+ }
+ }
+ return forward_taskmgmt_command(TASK_MGMT_ABORT_TASK, scsicmd->device);
+}
+
+static int
+virthba_bus_reset_handler(struct scsi_cmnd *scsicmd)
+{
+ /* issue TASK_MGMT_TARGET_RESET for each target on the bus */
+ struct scsi_device *scsidev;
+ struct virtdisk_info *vdisk;
+
+ scsidev = scsicmd->device;
+ for (vdisk = &((struct virthba_info *) scsidev->host->hostdata)->head;
+ vdisk->next; vdisk = vdisk->next) {
+ if ((scsidev->channel == vdisk->channel)
+ && (scsidev->id == vdisk->id)
+ && (scsidev->lun == vdisk->lun)) {
+ if (atomic_read(&vdisk->error_count) <
+ VIRTHBA_ERROR_COUNT) {
+ atomic_inc(&vdisk->error_count);
+ POSTCODE_LINUX_2(VHBA_COMMAND_HANDLER_PC,
+ POSTCODE_SEVERITY_INFO);
+ } else
+ atomic_set(&vdisk->ios_threshold,
+ IOS_ERROR_THRESHOLD);
+ }
+ }
+ return forward_taskmgmt_command(TASK_MGMT_BUS_RESET, scsicmd->device);
+}
+
+static int
+virthba_device_reset_handler(struct scsi_cmnd *scsicmd)
+{
+ /* issue TASK_MGMT_LUN_RESET */
+ struct scsi_device *scsidev;
+ struct virtdisk_info *vdisk;
+
+ scsidev = scsicmd->device;
+ for (vdisk = &((struct virthba_info *) scsidev->host->hostdata)->head;
+ vdisk->next; vdisk = vdisk->next) {
+ if ((scsidev->channel == vdisk->channel)
+ && (scsidev->id == vdisk->id)
+ && (scsidev->lun == vdisk->lun)) {
+ if (atomic_read(&vdisk->error_count) <
+ VIRTHBA_ERROR_COUNT) {
+ atomic_inc(&vdisk->error_count);
+ POSTCODE_LINUX_2(VHBA_COMMAND_HANDLER_PC,
+ POSTCODE_SEVERITY_INFO);
+ } else
+ atomic_set(&vdisk->ios_threshold,
+ IOS_ERROR_THRESHOLD);
+ }
+ }
+ return forward_taskmgmt_command(TASK_MGMT_LUN_RESET, scsicmd->device);
+}
+
+static int
+virthba_host_reset_handler(struct scsi_cmnd *scsicmd)
+{
+ /* issue TASK_MGMT_TARGET_RESET for each target on each bus for host */
+ LOGERR("virthba_host_reset_handler Not yet implemented\n");
+ return SUCCESS;
+}
+
+static char virthba_get_info_str[256];
+
+static const char *
+virthba_get_info(struct Scsi_Host *shp)
+{
+ /* Return version string */
+ sprintf(virthba_get_info_str, "virthba, version %s\n", VIRTHBA_VERSION);
+ return virthba_get_info_str;
+}
+
+static int
+virthba_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
+{
+ DBGINF("In virthba_ioctl: ioctl: cmd=0x%x\n", cmd);
+ return -EINVAL;
+}
+
+/* This returns SCSI_MLQUEUE_DEVICE_BUSY if the signal queue to IOpart
+ * is full.
+ */
+static int
+virthba_queue_command_lck(struct scsi_cmnd *scsicmd,
+ void (*virthba_cmnd_done)(struct scsi_cmnd *))
+{
+ struct scsi_device *scsidev = scsicmd->device;
+ int insert_location;
+ unsigned char op;
+ unsigned char *cdb = scsicmd->cmnd;
+ struct Scsi_Host *scsihost = scsidev->host;
+ struct uiscmdrsp *cmdrsp;
+ unsigned int i;
+ struct virthba_info *virthbainfo =
+ (struct virthba_info *) scsihost->hostdata;
+ struct scatterlist *sg = NULL;
+ struct scatterlist *sgl = NULL;
+ int sg_failed = 0;
+
+ if (virthbainfo->serverdown || virthbainfo->serverchangingstate) {
+ DBGINF("Server is down/changing state. Returning SCSI_MLQUEUE_DEVICE_BUSY.\n");
+ return SCSI_MLQUEUE_DEVICE_BUSY;
+ }
+
+ ALLOC_CMDRSP(cmdrsp);
+ if (cmdrsp == NULL) {
+ LOGERR("kmalloc of cmdrsp failed.\n");
+ return 1; /* reject the command */
+ }
+
+ /* now saving everything we need from scsi_cmd into cmdrsp
+ * before we queue cmdrsp set type to command - as opposed to
+ * task mgmt
+ */
+ cmdrsp->cmdtype = CMD_SCSI_TYPE;
+ /* save the pending insertion location. Deletion from pending
+ * will return the scsicmd pointer for completion
+ */
+ insert_location =
+ add_scsipending_entry(virthbainfo, CMD_SCSI_TYPE, (void *) scsicmd);
+ if (insert_location != -1) {
+ cmdrsp->scsi.scsicmd = (void *) (uintptr_t) insert_location;
+ } else {
+ LOGERR("Queue is full. Returning busy.\n");
+ kfree(cmdrsp);
+ return SCSI_MLQUEUE_DEVICE_BUSY;
+ }
+ /* save done function that we have call when cmd is complete */
+ scsicmd->scsi_done = virthba_cmnd_done;
+ /* save destination */
+ cmdrsp->scsi.vdest.channel = scsidev->channel;
+ cmdrsp->scsi.vdest.id = scsidev->id;
+ cmdrsp->scsi.vdest.lun = scsidev->lun;
+ /* save datadir */
+ cmdrsp->scsi.data_dir = scsicmd->sc_data_direction;
+ memcpy(cmdrsp->scsi.cmnd, cdb, MAX_CMND_SIZE);
+
+ cmdrsp->scsi.bufflen = scsi_bufflen(scsicmd);
+
+ /* keep track of the max buffer length so far. */
+ if (cmdrsp->scsi.bufflen > MaxBuffLen)
+ MaxBuffLen = cmdrsp->scsi.bufflen;
+
+ if (scsi_sg_count(scsicmd) > MAX_PHYS_INFO) {
+ LOGERR("scsicmd use_sg:%d greater than MAX:%d\n",
+ scsi_sg_count(scsicmd), MAX_PHYS_INFO);
+ del_scsipending_entry(virthbainfo, (uintptr_t) insert_location);
+ kfree(cmdrsp);
+ return 1; /* reject the command */
+ }
+
+ /* This is what we USED to do when we assumed we were running */
+ /* uissd & virthba on the same Linux system. */
+ /* cmdrsp->scsi.buffer = scsicmd->request_buffer; */
+ /* The following code does NOT make that assumption. */
+ /* convert buffer to phys information */
+ if (scsi_sg_count(scsicmd) == 0) {
+ if (scsi_bufflen(scsicmd) > 0) {
+ LOGERR("**** FAILED No scatter list for bufflen > 0\n");
+ BUG_ON(scsi_sg_count(scsicmd) == 0);
+ }
+ DBGINF("No sg; buffer:0x%p bufflen:%d\n",
+ scsi_sglist(scsicmd), scsi_bufflen(scsicmd));
+ } else {
+ /* buffer is scatterlist - copy it out */
+ sgl = scsi_sglist(scsicmd);
+
+ for_each_sg(sgl, sg, scsi_sg_count(scsicmd), i) {
+
+ cmdrsp->scsi.gpi_list[i].address = sg_phys(sg);
+ cmdrsp->scsi.gpi_list[i].length = sg->length;
+ if ((i != 0) && (sg->offset != 0))
+ LOGINF("Offset on a sg_entry other than zero =<<%d>>.\n",
+ sg->offset);
+ }
+
+ if (sg_failed) {
+ LOGERR("Start sg_list dump (entries %d, bufflen %d)...\n",
+ scsi_sg_count(scsicmd), cmdrsp->scsi.bufflen);
+ for_each_sg(sgl, sg, scsi_sg_count(scsicmd), i) {
+ LOGERR(" Entry(%d): page->[0x%p], phys->[0x%Lx], off(%d), len(%d)\n",
+ i, sg_page(sg),
+ (unsigned long long) sg_phys(sg),
+ sg->offset, sg->length);
+ }
+ LOGERR("Done sg_list dump.\n");
+ /* BUG(); ***** For now, let it fail in uissd
+ * if it is a problem, as it might just
+ * work
+ */
+ }
+
+ cmdrsp->scsi.guest_phys_entries = scsi_sg_count(scsicmd);
+ }
+
+ op = cdb[0];
+ i = uisqueue_put_cmdrsp_with_lock_client(virthbainfo->chinfo.queueinfo,
+ cmdrsp, IOCHAN_TO_IOPART,
+ &virthbainfo->chinfo.
+ insertlock,
+ DONT_ISSUE_INTERRUPT,
+ (U64) NULL, DONT_WAIT, "vhba");
+ if (i == 0) {
+ /* queue must be full - and we said don't wait - return busy */
+ LOGERR("uisqueue_put_cmdrsp_with_lock ****FAILED\n");
+ kfree(cmdrsp);
+ del_scsipending_entry(virthbainfo, (uintptr_t) insert_location);
+ return SCSI_MLQUEUE_DEVICE_BUSY;
+ }
+
+ /* we're done with cmdrsp space - data from it has been copied
+ * into channel - free it now.
+ */
+ kfree(cmdrsp);
+ return 0; /* non-zero implies host/device is busy */
+}
+
+static int
+virthba_slave_alloc(struct scsi_device *scsidev)
+{
+ /* this called by the midlayer before scan for new devices -
+ * LLD can alloc any struc & do init if needed.
+ */
+ struct virtdisk_info *vdisk;
+ struct virtdisk_info *tmpvdisk;
+ struct virthba_info *virthbainfo;
+ struct Scsi_Host *scsihost = (struct Scsi_Host *) scsidev->host;
+
+ virthbainfo = (struct virthba_info *) scsihost->hostdata;
+ if (!virthbainfo) {
+ LOGERR("Could not find virthba_info for scsihost\n");
+ return 0; /* even though we errored, treat as success */
+ }
+ for (vdisk = &virthbainfo->head; vdisk->next; vdisk = vdisk->next) {
+ if (vdisk->next->valid &&
+ (vdisk->next->channel == scsidev->channel) &&
+ (vdisk->next->id == scsidev->id) &&
+ (vdisk->next->lun == scsidev->lun))
+ return 0;
+ }
+ tmpvdisk = kmalloc(sizeof(struct virtdisk_info), GFP_ATOMIC);
+ if (!tmpvdisk) { /* error allocating */
+ LOGERR("Could not allocate memory for disk\n");
+ return 0;
+ }
+ memset(tmpvdisk, 0, sizeof(struct virtdisk_info));
+ tmpvdisk->channel = scsidev->channel;
+ tmpvdisk->id = scsidev->id;
+ tmpvdisk->lun = scsidev->lun;
+ tmpvdisk->valid = 1;
+ vdisk->next = tmpvdisk;
+ return 0; /* success */
+}
+
+static int
+virthba_slave_configure(struct scsi_device *scsidev)
+{
+ return 0; /* success */
+}
+
+static void
+virthba_slave_destroy(struct scsi_device *scsidev)
+{
+ /* midlevel calls this after device has been quiesced and
+ * before it is to be deleted.
+ */
+ struct virtdisk_info *vdisk, *delvdisk;
+ struct virthba_info *virthbainfo;
+ struct Scsi_Host *scsihost = (struct Scsi_Host *) scsidev->host;
+
+ virthbainfo = (struct virthba_info *) scsihost->hostdata;
+ if (!virthbainfo)
+ LOGERR("Could not find virthba_info for scsihost\n");
+ for (vdisk = &virthbainfo->head; vdisk->next; vdisk = vdisk->next) {
+ if (vdisk->next->valid &&
+ (vdisk->next->channel == scsidev->channel) &&
+ (vdisk->next->id == scsidev->id) &&
+ (vdisk->next->lun == scsidev->lun)) {
+ delvdisk = vdisk->next;
+ vdisk->next = vdisk->next->next;
+ kfree(delvdisk);
+ return;
+ }
+ }
+ return;
+}
+
+/*****************************************************/
+/* Scsi Cmnd support thread */
+/*****************************************************/
+
+static void
+do_scsi_linuxstat(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd)
+{
+ struct virtdisk_info *vdisk;
+ struct scsi_device *scsidev;
+ struct sense_data *sd;
+
+ scsidev = scsicmd->device;
+ memcpy(scsicmd->sense_buffer, cmdrsp->scsi.sensebuf, MAX_SENSE_SIZE);
+ sd = (struct sense_data *) scsicmd->sense_buffer;
+
+ /* Do not log errors for disk-not-present inquiries */
+ if ((cmdrsp->scsi.cmnd[0] == INQUIRY) &&
+ (host_byte(cmdrsp->scsi.linuxstat) == DID_NO_CONNECT) &&
+ (cmdrsp->scsi.addlstat == ADDL_SEL_TIMEOUT))
+ return;
+
+ /* Okay see what our error_count is here.... */
+ for (vdisk = &((struct virthba_info *) scsidev->host->hostdata)->head;
+ vdisk->next; vdisk = vdisk->next) {
+ if ((scsidev->channel != vdisk->channel)
+ || (scsidev->id != vdisk->id)
+ || (scsidev->lun != vdisk->lun))
+ continue;
+
+ if (atomic_read(&vdisk->error_count) < VIRTHBA_ERROR_COUNT) {
+ atomic_inc(&vdisk->error_count);
+ LOGERR("SCSICMD ****FAILED scsicmd:0x%p op:0x%x <%d:%d:%d:%d> 0x%x-0x%x-0x%x-0x%x-0x%x.\n",
+ scsicmd, cmdrsp->scsi.cmnd[0],
+ scsidev->host->host_no, scsidev->id,
+ scsidev->channel, scsidev->lun,
+ cmdrsp->scsi.linuxstat, sd->Valid, sd->SenseKey,
+ sd->AdditionalSenseCode,
+ sd->AdditionalSenseCodeQualifier);
+ if (atomic_read(&vdisk->error_count) ==
+ VIRTHBA_ERROR_COUNT) {
+ LOGERR("Throtling SCSICMD errors disk <%d:%d:%d:%d>\n",
+ scsidev->host->host_no, scsidev->id,
+ scsidev->channel, scsidev->lun);
+ }
+ atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD);
+ }
+ }
+}
+
+static void
+do_scsi_nolinuxstat(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd)
+{
+ struct scsi_device *scsidev;
+ unsigned char buf[36];
+ struct scatterlist *sg;
+ unsigned int i;
+ char *thispage;
+ char *thispage_orig;
+ int bufind = 0;
+ struct virtdisk_info *vdisk;
+
+ scsidev = scsicmd->device;
+ if ((cmdrsp->scsi.cmnd[0] == INQUIRY)
+ && (cmdrsp->scsi.bufflen >= MIN_INQUIRY_RESULT_LEN)) {
+ if (cmdrsp->scsi.no_disk_result == 0)
+ return;
+
+ /* Linux scsi code is weird; it wants
+ * a device at Lun 0 to issue report
+ * luns, but we don't want a disk
+ * there so we'll present a processor
+ * there. */
+ SET_NO_DISK_INQUIRY_RESULT(buf, cmdrsp->scsi.bufflen,
+ scsidev->lun,
+ DEV_DISK_CAPABLE_NOT_PRESENT,
+ DEV_NOT_CAPABLE);
+
+ if (scsi_sg_count(scsicmd) == 0) {
+ if (scsi_bufflen(scsicmd) > 0) {
+ LOGERR("**** FAILED No scatter list for bufflen > 0\n");
+ BUG_ON(scsi_sg_count(scsicmd) ==
+ 0);
+ }
+ memcpy(scsi_sglist(scsicmd), buf,
+ cmdrsp->scsi.bufflen);
+ return;
+ }
+
+ sg = scsi_sglist(scsicmd);
+ for (i = 0; i < scsi_sg_count(scsicmd); i++) {
+ DBGVER("copying OUT OF buf into 0x%p %d\n",
+ sg_page(sg + i), sg[i].length);
+ thispage_orig = kmap_atomic(sg_page(sg + i));
+ thispage = (void *) ((unsigned long)thispage_orig |
+ sg[i].offset);
+ memcpy(thispage, buf + bufind, sg[i].length);
+ kunmap_atomic(thispage_orig);
+ bufind += sg[i].length;
+ }
+ } else {
+
+ vdisk = &((struct virthba_info *)scsidev->host->hostdata)->head;
+ for ( ; vdisk->next; vdisk = vdisk->next) {
+ if ((scsidev->channel != vdisk->channel)
+ || (scsidev->id != vdisk->id)
+ || (scsidev->lun != vdisk->lun))
+ continue;
+
+ if (atomic_read(&vdisk->ios_threshold) > 0) {
+ atomic_dec(&vdisk->ios_threshold);
+ if (atomic_read(&vdisk->ios_threshold) == 0) {
+ LOGERR("Resetting error count for disk\n");
+ atomic_set(&vdisk->error_count, 0);
+ }
+ }
+ }
+ }
+}
+
+static void
+complete_scsi_command(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd)
+{
+ DBGINF("cmdrsp: 0x%p, scsistat:0x%x.\n", cmdrsp, cmdrsp->scsi.scsistat);
+
+ /* take what we need out of cmdrsp and complete the scsicmd */
+ scsicmd->result = cmdrsp->scsi.linuxstat;
+ if (cmdrsp->scsi.linuxstat)
+ do_scsi_linuxstat(cmdrsp, scsicmd);
+ else
+ do_scsi_nolinuxstat(cmdrsp, scsicmd);
+
+ if (scsicmd->scsi_done) {
+ DBGVER("Scsi_DONE\n");
+ scsicmd->scsi_done(scsicmd);
+ }
+}
+
+static inline void
+complete_vdiskmgmt_command(struct uiscmdrsp *cmdrsp)
+{
+ /* copy the result of the taskmgmt and */
+ /* wake up the error handler that is waiting for this */
+ *(int *) cmdrsp->vdiskmgmt.notifyresult = cmdrsp->vdiskmgmt.result;
+ wake_up_all((wait_queue_head_t *) cmdrsp->vdiskmgmt.notify);
+ LOGINF("set notify result to %d\n", cmdrsp->vdiskmgmt.result);
+}
+
+static inline void
+complete_taskmgmt_command(struct uiscmdrsp *cmdrsp)
+{
+ /* copy the result of the taskmgmt and */
+ /* wake up the error handler that is waiting for this */
+ *(int *) cmdrsp->scsitaskmgmt.notifyresult =
+ cmdrsp->scsitaskmgmt.result;
+ wake_up_all((wait_queue_head_t *) cmdrsp->scsitaskmgmt.notify);
+ LOGINF("set notify result to %d\n", cmdrsp->scsitaskmgmt.result);
+}
+
+static void
+drain_queue(struct virthba_info *virthbainfo, struct chaninfo *dc,
+ struct uiscmdrsp *cmdrsp)
+{
+ unsigned long flags;
+ int qrslt = 0;
+ struct scsi_cmnd *scsicmd;
+ struct Scsi_Host *shost = virthbainfo->scsihost;
+
+ while (1) {
+ spin_lock_irqsave(&virthbainfo->chinfo.insertlock, flags);
+ if (!ULTRA_CHANNEL_CLIENT_ACQUIRE_OS(dc->queueinfo->chan,
+ "vhba", NULL)) {
+ spin_unlock_irqrestore(&virthbainfo->chinfo.insertlock,
+ flags);
+ virthbainfo->acquire_failed_cnt++;
+ break;
+ }
+ qrslt = uisqueue_get_cmdrsp(dc->queueinfo, cmdrsp,
+ IOCHAN_FROM_IOPART);
+ ULTRA_CHANNEL_CLIENT_RELEASE_OS(dc->queueinfo->chan,
+ "vhba", NULL);
+ spin_unlock_irqrestore(&virthbainfo->chinfo.insertlock, flags);
+ if (qrslt == 0)
+ break;
+ if (cmdrsp->cmdtype == CMD_SCSI_TYPE) {
+ /* scsicmd location is returned by the
+ * deletion
+ */
+ scsicmd = del_scsipending_entry(virthbainfo,
+ (uintptr_t) cmdrsp->scsi.scsicmd);
+ if (!scsicmd)
+ break;
+ /* complete the orig cmd */
+ complete_scsi_command(cmdrsp, scsicmd);
+ } else if (cmdrsp->cmdtype == CMD_SCSITASKMGMT_TYPE) {
+ if (!del_scsipending_entry(virthbainfo,
+ (uintptr_t) cmdrsp->scsitaskmgmt.scsicmd))
+ break;
+ complete_taskmgmt_command(cmdrsp);
+ } else if (cmdrsp->cmdtype == CMD_NOTIFYGUEST_TYPE) {
+ /* The vHba pointer has no meaning in
+ * a Client/Guest Partition. Let's be
+ * safe and set it to NULL now. Do
+ * not use it here! */
+ cmdrsp->disknotify.vHba = NULL;
+ process_disk_notify(shost, cmdrsp);
+ } else if (cmdrsp->cmdtype == CMD_VDISKMGMT_TYPE) {
+ if (!del_scsipending_entry(virthbainfo,
+ (uintptr_t) cmdrsp->vdiskmgmt.scsicmd))
+ break;
+ complete_vdiskmgmt_command(cmdrsp);
+ } else
+ LOGERR("Invalid cmdtype %d\n", cmdrsp->cmdtype);
+ /* cmdrsp is now available for reuse */
+ }
+}
+
+
+/* main function for the thread that waits for scsi commands to arrive
+ * in a specified queue
+ */
+static int
+process_incoming_rsps(void *v)
+{
+ struct virthba_info *virthbainfo = v;
+ struct chaninfo *dc = &virthbainfo->chinfo;
+ struct uiscmdrsp *cmdrsp = NULL;
+ const int SZ = sizeof(struct uiscmdrsp);
+ U64 mask;
+ unsigned long long rc1;
+
+ UIS_DAEMONIZE("vhba_incoming");
+ /* alloc once and reuse */
+ cmdrsp = kmalloc(SZ, GFP_ATOMIC);
+ if (cmdrsp == NULL) {
+ LOGERR("process_incoming_rsps ****FAILED to malloc - thread exiting\n");
+ complete_and_exit(&dc->threadinfo.has_stopped, 0);
+ return 0;
+ }
+ mask = ULTRA_CHANNEL_ENABLE_INTS;
+ while (1) {
+ wait_event_interruptible_timeout(virthbainfo->rsp_queue,
+ (atomic_read(&virthbainfo->interrupt_rcvd) == 1),
+ usecs_to_jiffies(rsltq_wait_usecs));
+ atomic_set(&virthbainfo->interrupt_rcvd, 0);
+ /* drain queue */
+ drain_queue(virthbainfo, dc, cmdrsp);
+ rc1 = uisqueue_InterlockedOr(virthbainfo->flags_addr, mask);
+ if (dc->threadinfo.should_stop)
+ break;
+ }
+
+ kfree(cmdrsp);
+
+ DBGINF("exiting processing incoming rsps.\n");
+ complete_and_exit(&dc->threadinfo.has_stopped, 0);
+}
+
+/*****************************************************/
+/* proc filesystem functions */
+/*****************************************************/
+
+static ssize_t
+info_proc_read(struct file *file, char __user *buf, size_t len, loff_t *offset)
+{
+ int length = 0;
+ U64 phys_flags_addr;
+ int i;
+ struct virthba_info *virthbainfo;
+ char *vbuf;
+ loff_t pos = *offset;
+
+ if (pos < 0)
+ return -EINVAL;
+
+ if (pos > 0 || !len)
+ return 0;
+
+ vbuf = kzalloc(len, GFP_KERNEL);
+ if (!vbuf)
+ return -ENOMEM;
+
+ for (i = 0; i < VIRTHBASOPENMAX; i++) {
+ if (VirtHbasOpen[i].virthbainfo == NULL)
+ continue;
+
+ virthbainfo = VirtHbasOpen[i].virthbainfo;
+ length += sprintf(vbuf + length, "CHANSOCK is not defined.\n");
+
+ length += sprintf(vbuf + length, "MaxBuffLen:%d\n", MaxBuffLen);
+
+ length += sprintf(vbuf + length, "\nvirthba result queue poll wait:%d usecs.\n",
+ rsltq_wait_usecs);
+
+ length += sprintf(vbuf + length,
+ "\nModule build: Date:%s Time:%s\n",
+ __DATE__, __TIME__);
+ length += sprintf(vbuf + length, "\ninterrupts_rcvd = %llu, interrupts_disabled = %llu\n",
+ virthbainfo->interrupts_rcvd,
+ virthbainfo->interrupts_disabled);
+ length += sprintf(vbuf + length, "\ninterrupts_notme = %llu,\n",
+ virthbainfo->interrupts_notme);
+ phys_flags_addr = virt_to_phys(virthbainfo->flags_addr);
+
+ length += sprintf(vbuf + length, "flags_addr = %p, phys_flags_addr=0x%016llx, FeatureFlags=%llu\n",
+ virthbainfo->flags_addr, phys_flags_addr,
+ *virthbainfo->flags_addr);
+ length += sprintf(vbuf + length, "acquire_failed_cnt:%llu\n",
+ virthbainfo->acquire_failed_cnt);
+
+ length += sprintf(vbuf + length, "\n");
+ }
+ if (copy_to_user(buf, vbuf, length)) {
+ kfree(vbuf);
+ return -EFAULT;
+ }
+
+ kfree(vbuf);
+ *offset += length;
+ return length;
+}
+
+static ssize_t
+enable_ints_read(struct file *file, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ return 0;
+}
+
+static ssize_t
+enable_ints_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ char buf[count + 1];
+ int i, new_value;
+ struct virthba_info *virthbainfo;
+ U64 *Features_addr;
+ U64 mask;
+
+ buf[count] = '\0';
+ if (copy_from_user(buf, buffer, count)) {
+ LOGERR("copy_from_user failed. buf<<%.*s>> count<<%lu>>\n",
+ (int) count, buf, count);
+ return -EFAULT;
+ }
+
+ i = sscanf(buf, "%d", &new_value);
+
+ if (i < 1) {
+ LOGERR("Failed to scan value for enable_ints, buf<<%.*s>>",
+ (int) count, buf);
+ return -EFAULT;
+ }
+
+ /* set all counts to new_value usually 0 */
+ for (i = 0; i < VIRTHBASOPENMAX; i++) {
+ if (VirtHbasOpen[i].virthbainfo != NULL) {
+ virthbainfo = VirtHbasOpen[i].virthbainfo;
+ Features_addr =
+ &virthbainfo->chinfo.queueinfo->chan->Features;
+ if (new_value == 1) {
+ mask = ~(ULTRA_IO_CHANNEL_IS_POLLING |
+ ULTRA_IO_DRIVER_DISABLES_INTS);
+ uisqueue_InterlockedAnd(Features_addr, mask);
+ mask = ULTRA_IO_DRIVER_ENABLES_INTS;
+ uisqueue_InterlockedOr(Features_addr, mask);
+ rsltq_wait_usecs = 4000000;
+ } else {
+ mask = ~(ULTRA_IO_DRIVER_ENABLES_INTS |
+ ULTRA_IO_DRIVER_DISABLES_INTS);
+ uisqueue_InterlockedAnd(Features_addr, mask);
+ mask = ULTRA_IO_CHANNEL_IS_POLLING;
+ uisqueue_InterlockedOr(Features_addr, mask);
+ rsltq_wait_usecs = 4000;
+ }
+ }
+ }
+ return count;
+}
+
+static ssize_t
+rqwu_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ char buf[count];
+ int i, usecs;
+
+ if (copy_from_user(buf, buffer, count)) {
+ LOGERR("copy_from_user failed. buf<<%.*s>> count<<%lu>>\n",
+ (int) count, buf, count);
+ return -EFAULT;
+ }
+
+ i = sscanf(buf, "%d", &usecs);
+
+ if (i < 1) {
+ LOGERR("Failed to scan value for rqwait_usecs buf<<%.*s>>",
+ (int) count, buf);
+ return -EFAULT;
+ }
+
+ /* set global wait time */
+ rsltq_wait_usecs = usecs;
+ return count;
+}
+
+/* As per VirtpciFunc returns 1 for success and 0 for failure */
+static int
+virthba_serverup(struct virtpci_dev *virtpcidev)
+{
+ struct virthba_info *virthbainfo =
+ (struct virthba_info *) ((struct Scsi_Host *) virtpcidev->scsi.
+ scsihost)->hostdata;
+
+ DBGINF("virtpcidev busNo<<%d>>devNo<<%d>>", virtpcidev->busNo,
+ virtpcidev->deviceNo);
+
+ if (!virthbainfo->serverdown) {
+ DBGINF("Server up message recieved while server is already up.\n");
+ return 1;
+ }
+ if (virthbainfo->serverchangingstate) {
+ LOGERR("Server already processing change state message\n");
+ return 0;
+ }
+
+ virthbainfo->serverchangingstate = true;
+ /* Must transition channel to ATTACHED state BEFORE we
+ * can start using the device again
+ */
+ ULTRA_CHANNEL_CLIENT_TRANSITION(virthbainfo->chinfo.queueinfo->chan,
+ dev_name(&virtpcidev->generic_dev),
+ CliStateOS,
+ CHANNELCLI_ATTACHED, NULL);
+
+ /* Start Processing the IOVM Response Queue Again */
+ if (!uisthread_start(&virthbainfo->chinfo.threadinfo,
+ process_incoming_rsps,
+ virthbainfo, "vhba_incoming")) {
+ LOGERR("uisthread_start rsp ****FAILED\n");
+ return 0;
+ }
+ virthbainfo->serverdown = false;
+ virthbainfo->serverchangingstate = false;
+
+ return 1;
+}
+
+static void
+virthba_serverdown_complete(struct work_struct *work)
+{
+ struct virthba_info *virthbainfo;
+ struct virtpci_dev *virtpcidev;
+ int i;
+ struct scsipending *pendingdel = NULL;
+ struct scsi_cmnd *scsicmd = NULL;
+ struct uiscmdrsp *cmdrsp;
+ unsigned long flags;
+
+ virthbainfo = container_of(work, struct virthba_info,
+ serverdown_completion);
+
+ /* Stop Using the IOVM Response Queue (queue should be drained
+ * by the end)
+ */
+ uisthread_stop(&virthbainfo->chinfo.threadinfo);
+
+ /* Fail Commands that weren't completed */
+ spin_lock_irqsave(&virthbainfo->privlock, flags);
+ for (i = 0; i < MAX_PENDING_REQUESTS; i++) {
+ pendingdel = &(virthbainfo->pending[i]);
+ switch (pendingdel->cmdtype) {
+ case CMD_SCSI_TYPE:
+ scsicmd = (struct scsi_cmnd *) pendingdel->sent;
+ scsicmd->result = (DID_RESET << 16);
+ if (scsicmd->scsi_done)
+ scsicmd->scsi_done(scsicmd);
+ break;
+ case CMD_SCSITASKMGMT_TYPE:
+ cmdrsp = (struct uiscmdrsp *) pendingdel->sent;
+ DBGINF("cmdrsp=0x%x, notify=0x%x\n", cmdrsp,
+ cmdrsp->scsitaskmgmt.notify);
+ *(int *) cmdrsp->scsitaskmgmt.notifyresult =
+ TASK_MGMT_FAILED;
+ wake_up_all((wait_queue_head_t *)
+ cmdrsp->scsitaskmgmt.notify);
+ break;
+ case CMD_VDISKMGMT_TYPE:
+ cmdrsp = (struct uiscmdrsp *) pendingdel->sent;
+ *(int *) cmdrsp->vdiskmgmt.notifyresult =
+ VDISK_MGMT_FAILED;
+ wake_up_all((wait_queue_head_t *)
+ cmdrsp->vdiskmgmt.notify);
+ break;
+ default:
+ if (pendingdel->sent != NULL)
+ LOGERR("Unknown command type: 0x%x. Only freeing list structure.\n",
+ pendingdel->cmdtype);
+ }
+ pendingdel->cmdtype = 0;
+ pendingdel->sent = NULL;
+ }
+ spin_unlock_irqrestore(&virthbainfo->privlock, flags);
+
+ virtpcidev = virthbainfo->virtpcidev;
+
+ DBGINF("virtpcidev busNo<<%d>>devNo<<%d>>", virtpcidev->busNo,
+ virtpcidev->deviceNo);
+ virthbainfo->serverdown = true;
+ virthbainfo->serverchangingstate = false;
+ /* Return the ServerDown response to Command */
+ device_pause_response(virtpcidev->busNo, virtpcidev->deviceNo, 0);
+}
+
+/* As per VirtpciFunc returns 1 for success and 0 for failure */
+static int
+virthba_serverdown(struct virtpci_dev *virtpcidev, u32 state)
+{
+ struct virthba_info *virthbainfo =
+ (struct virthba_info *) ((struct Scsi_Host *) virtpcidev->scsi.
+ scsihost)->hostdata;
+
+ DBGINF("virthba_serverdown");
+ DBGINF("virtpcidev busNo<<%d>>devNo<<%d>>", virtpcidev->busNo,
+ virtpcidev->deviceNo);
+
+ if (!virthbainfo->serverdown && !virthbainfo->serverchangingstate) {
+ virthbainfo->serverchangingstate = true;
+ queue_work(virthba_serverdown_workqueue,
+ &virthbainfo->serverdown_completion);
+ } else if (virthbainfo->serverchangingstate) {
+ LOGERR("Server already processing change state message\n");
+ return 0;
+ } else
+ LOGERR("Server already down, but another server down message received.");
+
+ return 1;
+}
+
+/*****************************************************/
+/* Module Init & Exit functions */
+/*****************************************************/
+
+static int __init
+virthba_parse_line(char *str)
+{
+ DBGINF("In virthba_parse_line %s\n", str);
+ return 1;
+}
+
+static void __init
+virthba_parse_options(char *line)
+{
+ char *next = line;
+
+ POSTCODE_LINUX_2(VHBA_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO);
+ if (line == NULL || !*line)
+ return;
+ while ((line = next) != NULL) {
+ next = strchr(line, ' ');
+ if (next != NULL)
+ *next++ = 0;
+ if (!virthba_parse_line(line))
+ DBGINF("Unknown option '%s'\n", line);
+ }
+
+ POSTCODE_LINUX_2(VHBA_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO);
+}
+
+static int __init
+virthba_mod_init(void)
+{
+ int error;
+ int i;
+
+ LOGINF("Entering virthba_mod_init...\n");
+
+ POSTCODE_LINUX_2(VHBA_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO);
+ virthba_parse_options(virthba_options);
+
+ error = virtpci_register_driver(&virthba_driver);
+ if (error < 0) {
+ LOGERR("register ****FAILED 0x%x\n", error);
+ POSTCODE_LINUX_3(VHBA_CREATE_FAILURE_PC, error,
+ POSTCODE_SEVERITY_ERR);
+ } else {
+ /* create the proc directories */
+ virthba_proc_dir = proc_mkdir(DIR_PROC_ENTRY, NULL);
+ info_proc_entry = proc_create(INFO_PROC_ENTRY_FN, 0,
+ virthba_proc_dir,
+ &proc_info_fops);
+ rqwaitus_proc_entry = proc_create(RQWU_PROC_ENTRY_FN, 0,
+ virthba_proc_dir,
+ &proc_rqwu_fops);
+ enable_ints_proc_entry = proc_create(ENABLE_INTS_ENTRY_FN, 0,
+ virthba_proc_dir,
+ &proc_enable_ints_fops);
+
+ /* Initialize DARWorkQ */
+ INIT_WORK(&DARWorkQ, doDiskAddRemove);
+ spin_lock_init(&DARWorkQLock);
+
+ /* clear out array */
+ for (i = 0; i < VIRTHBASOPENMAX; i++)
+ VirtHbasOpen[i].virthbainfo = NULL;
+ /* Initialize the serverdown workqueue */
+ virthba_serverdown_workqueue =
+ create_singlethread_workqueue("virthba_serverdown");
+ if (virthba_serverdown_workqueue == NULL) {
+ LOGERR("**** FAILED virthba_serverdown_workqueue creation\n");
+ POSTCODE_LINUX_2(VHBA_CREATE_FAILURE_PC,
+ POSTCODE_SEVERITY_ERR);
+ error = -1;
+ }
+ }
+
+ POSTCODE_LINUX_2(VHBA_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO);
+ LOGINF("Leaving virthba_mod_init\n");
+ return error;
+}
+
+static ssize_t
+virthba_acquire_lun(struct device *cdev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct uisscsi_dest vdest;
+ struct Scsi_Host *shost = class_to_shost(cdev);
+ int i;
+
+ i = sscanf(buf, "%d-%d-%d", &vdest.channel, &vdest.id, &vdest.lun);
+ if (i != 3)
+ return i;
+
+ return forward_vdiskmgmt_command(VDISK_MGMT_ACQUIRE, shost, &vdest);
+}
+
+static ssize_t
+virthba_release_lun(struct device *cdev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct uisscsi_dest vdest;
+ struct Scsi_Host *shost = class_to_shost(cdev);
+ int i;
+
+ i = sscanf(buf, "%d-%d-%d", &vdest.channel, &vdest.id, &vdest.lun);
+ if (i != 3)
+ return i;
+
+ return forward_vdiskmgmt_command(VDISK_MGMT_RELEASE, shost, &vdest);
+}
+
+#define CLASS_DEVICE_ATTR(_name, _mode, _show, _store) \
+ struct device_attribute class_device_attr_##_name = \
+ __ATTR(_name, _mode, _show, _store)
+
+static CLASS_DEVICE_ATTR(acquire_lun, S_IWUSR, NULL, virthba_acquire_lun);
+static CLASS_DEVICE_ATTR(release_lun, S_IWUSR, NULL, virthba_release_lun);
+
+static DEVICE_ATTRIBUTE *virthba_shost_attrs[] = {
+ &class_device_attr_acquire_lun,
+ &class_device_attr_release_lun,
+ NULL
+};
+
+static void __exit
+virthba_mod_exit(void)
+{
+ LOGINF("entering virthba_mod_exit...\n");
+
+ virtpci_unregister_driver(&virthba_driver);
+ /* unregister is going to call virthba_remove */
+ /* destroy serverdown completion workqueue */
+ if (virthba_serverdown_workqueue) {
+ destroy_workqueue(virthba_serverdown_workqueue);
+ virthba_serverdown_workqueue = NULL;
+ }
+
+ if (info_proc_entry)
+ remove_proc_entry(INFO_PROC_ENTRY_FN, virthba_proc_dir);
+
+ if (rqwaitus_proc_entry)
+ remove_proc_entry(RQWU_PROC_ENTRY_FN, NULL);
+
+ if (enable_ints_proc_entry)
+ remove_proc_entry(ENABLE_INTS_ENTRY_FN, NULL);
+
+ if (virthba_proc_dir)
+ remove_proc_entry(DIR_PROC_ENTRY, NULL);
+
+ LOGINF("Leaving virthba_mod_exit\n");
+
+}
+
+/* specify function to be run at module insertion time */
+module_init(virthba_mod_init);
+
+/* specify function to be run when module is removed */
+module_exit(virthba_mod_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Usha Srinivasan");
+MODULE_ALIAS("uisvirthba");
+ /* this is extracted during depmod and kept in modules.dep */
+/* module parameter */
+module_param(virthba_options, charp, S_IRUGO);
Index: linux-2.6.staging/drivers/staging/unisys/virthba/virthba.h
===================================================================
--- /dev/null
+++ linux-2.6.staging/drivers/staging/unisys/virthba/virthba.h
@@ -0,0 +1,31 @@
+/* virthba.h
+ *
+ * Copyright © 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+/*
+ * Unisys Virtual HBA driver header
+ */
+
+
+
+#ifndef __VIRTHBA_H__
+#define __VIRTHBA_H__
+
+
+#define VIRTHBA_VERSION "01.00"
+
+
+#endif /* __VIRTHBA_H__ */
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