This patch enables the following: a) Initializes the Intel MIC X100 PCIe devices. b) Provides sysfs entries for family and stepping information. Co-author: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@xxxxxxxxx> Signed-off-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> Signed-off-by: Caz Yokoyama <Caz.Yokoyama@xxxxxxxxx> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@xxxxxxxxx> Signed-off-by: Harshavardhan R Kharche <harshavardhan.r.kharche@xxxxxxxxx> Signed-off-by: Nikhil Rao <nikhil.rao@xxxxxxxxx> Signed-off-by: Sudeep Dutt <sudeep.dutt@xxxxxxxxx> Acked-by: Yaozu (Eddie) Dong <eddie.dong@xxxxxxxxx> Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@xxxxxxxxx> --- Documentation/ABI/testing/sysfs-class-mic.txt | 34 +++ drivers/misc/Kconfig | 1 + drivers/misc/Makefile | 1 + drivers/misc/mic/Kconfig | 19 ++ drivers/misc/mic/Makefile | 5 + drivers/misc/mic/common/mic_device.h | 37 +++ drivers/misc/mic/host/Makefile | 8 + drivers/misc/mic/host/mic_device.h | 109 +++++++++ drivers/misc/mic/host/mic_main.c | 309 ++++++++++++++++++++++++++ drivers/misc/mic/host/mic_sysfs.c | 97 ++++++++ drivers/misc/mic/host/mic_x100.c | 75 +++++++ drivers/misc/mic/host/mic_x100.h | 47 ++++ 12 files changed, 742 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-mic.txt create mode 100644 drivers/misc/mic/Kconfig create mode 100644 drivers/misc/mic/Makefile create mode 100644 drivers/misc/mic/common/mic_device.h create mode 100644 drivers/misc/mic/host/Makefile create mode 100644 drivers/misc/mic/host/mic_device.h create mode 100644 drivers/misc/mic/host/mic_main.c create mode 100644 drivers/misc/mic/host/mic_sysfs.c create mode 100644 drivers/misc/mic/host/mic_x100.c create mode 100644 drivers/misc/mic/host/mic_x100.h diff --git a/Documentation/ABI/testing/sysfs-class-mic.txt b/Documentation/ABI/testing/sysfs-class-mic.txt new file mode 100644 index 0000000..09eb3c6 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-mic.txt @@ -0,0 +1,34 @@ +What: /sys/class/mic/ +Date: August 2013 +KernelVersion: 3.11 +Contact: Sudeep Dutt <sudeep.dutt@xxxxxxxxx> +Description: + The mic class directory belongs to Intel MIC devices and + provides information per MIC device. An Intel MIC device is a + PCIe form factor add-in Coprocessor card based on the Intel Many + Integrated Core (MIC) architecture that runs a Linux OS. + +What: /sys/class/mic/mic(x) +Date: August 2013 +KernelVersion: 3.11 +Contact: Sudeep Dutt <sudeep.dutt@xxxxxxxxx> +Description: + The directories /sys/class/mic/mic0, /sys/class/mic/mic1 etc., + represent MIC devices (0,1,..etc). Each directory has + information specific to that MIC device. + +What: /sys/class/mic/mic(x)/family +Date: August 2013 +KernelVersion: 3.11 +Contact: Sudeep Dutt <sudeep.dutt@xxxxxxxxx> +Description: + Provides information about the Coprocessor family for an Intel + MIC device. For example - "x100" + +What: /sys/class/mic/mic(x)/stepping +Date: August 2013 +KernelVersion: 3.11 +Contact: Sudeep Dutt <sudeep.dutt@xxxxxxxxx> +Description: + Provides information about the silicon stepping for an Intel + MIC device. For example - "A0" or "B0" diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 8dacd4c..e760715 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -537,4 +537,5 @@ source "drivers/misc/carma/Kconfig" source "drivers/misc/altera-stapl/Kconfig" source "drivers/misc/mei/Kconfig" source "drivers/misc/vmw_vmci/Kconfig" +source "drivers/misc/mic/Kconfig" endmenu diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index c235d5b..0b7ea3e 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -53,3 +53,4 @@ obj-$(CONFIG_INTEL_MEI) += mei/ obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/ obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o obj-$(CONFIG_SRAM) += sram.o +obj-y += mic/ diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig new file mode 100644 index 0000000..aaefd0c --- /dev/null +++ b/drivers/misc/mic/Kconfig @@ -0,0 +1,19 @@ +comment "Intel MIC Host Driver" + +config INTEL_MIC_HOST + tristate "Intel MIC Host Driver" + depends on 64BIT && PCI + default N + help + This enables Host Driver support for the Intel Many Integrated + Core (MIC) family of PCIe form factor coprocessor devices that + run a 64 bit Linux OS. The driver manages card OS state and + enables communication between host and card. Intel MIC X100 + devices are currently supported. + + If you are building a host kernel with an Intel MIC device then + say M (recommended) or Y, else say N. If unsure say N. + + More information about the Intel MIC family as well as the Linux + OS and tools for MIC to use with this driver are available from + <http://software.intel.com/en-us/mic-developer>. diff --git a/drivers/misc/mic/Makefile b/drivers/misc/mic/Makefile new file mode 100644 index 0000000..8e72421 --- /dev/null +++ b/drivers/misc/mic/Makefile @@ -0,0 +1,5 @@ +# +# Makefile - Intel MIC Linux driver. +# Copyright(c) 2013, Intel Corporation. +# +obj-$(CONFIG_INTEL_MIC_HOST) += host/ diff --git a/drivers/misc/mic/common/mic_device.h b/drivers/misc/mic/common/mic_device.h new file mode 100644 index 0000000..f02262e --- /dev/null +++ b/drivers/misc/mic/common/mic_device.h @@ -0,0 +1,37 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Intel MIC driver. + * + */ +#ifndef __MIC_COMMON_DEVICE_H_ +#define __MIC_COMMON_DEVICE_H_ + +/** + * struct mic_mw - MIC memory window + * + * @pa: Base physical address. + * @va: Base ioremap'd virtual address. + * @len: Size of the memory window. + */ +struct mic_mw { + phys_addr_t pa; + void __iomem *va; + resource_size_t len; +}; + +#endif diff --git a/drivers/misc/mic/host/Makefile b/drivers/misc/mic/host/Makefile new file mode 100644 index 0000000..93b9d25 --- /dev/null +++ b/drivers/misc/mic/host/Makefile @@ -0,0 +1,8 @@ +# +# Makefile - Intel MIC Linux driver. +# Copyright(c) 2013, Intel Corporation. +# +obj-$(CONFIG_INTEL_MIC_HOST) += mic_host.o +mic_host-objs := mic_main.o +mic_host-objs += mic_x100.o +mic_host-objs += mic_sysfs.o diff --git a/drivers/misc/mic/host/mic_device.h b/drivers/misc/mic/host/mic_device.h new file mode 100644 index 0000000..6cd904c --- /dev/null +++ b/drivers/misc/mic/host/mic_device.h @@ -0,0 +1,109 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * 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. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Intel MIC Host driver. + * + */ +#ifndef _MIC_DEVICE_H_ +#define _MIC_DEVICE_H_ + +/* The maximum number of MIC devices supported in a single host system. */ +#define MIC_MAX_NUM_DEVS 256 + +/** + * enum mic_hw_family - The hardware family to which a device belongs. + */ +enum mic_hw_family { + MIC_FAMILY_X100 = 0, + MIC_FAMILY_UNKNOWN +}; + +/** + * enum mic_stepping - MIC stepping ids. + */ +enum mic_stepping { + MIC_A0_STEP = 0x0, + MIC_B0_STEP = 0x10, + MIC_B1_STEP = 0x11, + MIC_C0_STEP = 0x20, +}; + +/** + * struct mic_device - MIC device information for each card. + * + * @mmio: MMIO bar information. + * @aper: Aperture bar information. + * @family: The MIC family to which this device belongs. + * @ops: MIC HW specific operations. + * @id: The unique device id for this MIC device. + * @stepping: Stepping ID. + * @attr_group: Pointer to list of sysfs attribute groups. + * @sdev: Device for sysfs entries. + */ +struct mic_device { + struct mic_mw mmio; + struct mic_mw aper; + enum mic_hw_family family; + struct mic_hw_ops *ops; + int id; + enum mic_stepping stepping; + const struct attribute_group **attr_group; + struct device *sdev; +}; + +/** + * struct mic_hw_ops - MIC HW specific operations. + * @aper_bar: Aperture bar resource number. + * @mmio_bar: MMIO bar resource number. + * @read_spad: Read from scratch pad register. + * @write_spad: Write to scratch pad register. + */ +struct mic_hw_ops { + u8 aper_bar; + u8 mmio_bar; + u32 (*read_spad)(struct mic_device *mdev, unsigned int idx); + void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val); +}; + +/** + * mic_mmio_read - read from an MMIO register. + * @mw: MMIO register base virtual address. + * @offset: register offset. + * + * RETURNS: register value. + */ +static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset) +{ + return ioread32(mw->va + offset); +} + +/** + * mic_mmio_write - write to an MMIO register. + * @mw: MMIO register base virtual address. + * @val: the data value to put into the register + * @offset: register offset. + * + * RETURNS: none. + */ +static inline void +mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset) +{ + iowrite32(val, mw->va + offset); +} + +void mic_sysfs_init(struct mic_device *mdev); +#endif diff --git a/drivers/misc/mic/host/mic_main.c b/drivers/misc/mic/host/mic_main.c new file mode 100644 index 0000000..228c96c --- /dev/null +++ b/drivers/misc/mic/host/mic_main.c @@ -0,0 +1,309 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * 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. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Intel MIC Host driver. + * + * Global TODO's across the driver to be added after initial base + * patches are accepted upstream: + * 1) Enable DMA support. + * 2) Enable per vring interrupt support. + */ +#include <linux/fs.h> +#include <linux/idr.h> +#include <linux/module.h> +#include <linux/pci.h> + +#include "../common/mic_device.h" +#include "mic_device.h" +#include "mic_x100.h" + +static const char mic_driver_name[] = "mic"; + +static DEFINE_PCI_DEVICE_TABLE(mic_pci_tbl) = { + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2253)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2254)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2255)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2256)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2257)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2258)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2259)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225a)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225b)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225c)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225d)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225e)}, + + /* required last entry */ + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, mic_pci_tbl); + +/* ID allocator for MIC devices */ +static struct ida g_mic_ida; +/* Class of MIC devices for sysfs accessibility. */ +static struct class *g_mic_class; +/* Base device node number for MIC devices */ +static dev_t g_mic_devno; + +/** + * mic_ops_init: Initialize HW specific operation tables. + * + * @mdev: pointer to mic_device instance + * + * returns none. + */ +static void mic_ops_init(struct mic_device *mdev) +{ + switch (mdev->family) { + case MIC_FAMILY_X100: + mdev->ops = &mic_x100_ops; + break; + default: + break; + } +} + +/** + * mic_get_family - Determine hardware family to which this MIC belongs. + * + * @pdev: The pci device structure + * + * returns family. + */ +static enum mic_hw_family mic_get_family(struct pci_dev *pdev) +{ + enum mic_hw_family family; + + switch (pdev->device) { + case MIC_X100_PCI_DEVICE_2250: + case MIC_X100_PCI_DEVICE_2251: + case MIC_X100_PCI_DEVICE_2252: + case MIC_X100_PCI_DEVICE_2253: + case MIC_X100_PCI_DEVICE_2254: + case MIC_X100_PCI_DEVICE_2255: + case MIC_X100_PCI_DEVICE_2256: + case MIC_X100_PCI_DEVICE_2257: + case MIC_X100_PCI_DEVICE_2258: + case MIC_X100_PCI_DEVICE_2259: + case MIC_X100_PCI_DEVICE_225a: + case MIC_X100_PCI_DEVICE_225b: + case MIC_X100_PCI_DEVICE_225c: + case MIC_X100_PCI_DEVICE_225d: + case MIC_X100_PCI_DEVICE_225e: + family = MIC_FAMILY_X100; + break; + default: + family = MIC_FAMILY_UNKNOWN; + break; + } + return family; +} + +/** + * mic_device_init - Allocates and initializes the MIC device structure + * + * @mdev: pointer to mic_device instance + * @pdev: The pci device structure + * + * returns none. + */ +static void +mic_device_init(struct mic_device *mdev, struct pci_dev *pdev) +{ + mdev->family = mic_get_family(pdev); + mdev->stepping = pdev->revision; + mic_ops_init(mdev); + mic_sysfs_init(mdev); +} + +/** + * mic_probe - Device Initialization Routine + * + * @pdev: PCI device structure + * @ent: entry in mic_pci_tbl + * + * returns 0 on success, < 0 on failure. + */ +static int mic_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + int rc; + struct mic_device *mdev; + + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); + if (!mdev) { + rc = -ENOMEM; + dev_err(&pdev->dev, "mdev kmalloc failed rc %d\n", rc); + goto mdev_alloc_fail; + } + mdev->id = ida_simple_get(&g_mic_ida, 0, MIC_MAX_NUM_DEVS, GFP_KERNEL); + if (mdev->id < 0) { + rc = mdev->id; + dev_err(&pdev->dev, "ida_simple_get failed rc %d\n", rc); + goto ida_fail; + } + + mic_device_init(mdev, pdev); + + rc = pci_enable_device(pdev); + if (rc) { + dev_err(&pdev->dev, "failed to enable pci device.\n"); + goto ida_remove; + } + + pci_set_master(pdev); + + rc = pci_request_regions(pdev, mic_driver_name); + if (rc) { + dev_err(&pdev->dev, "failed to get pci regions.\n"); + goto disable_device; + } + + rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (rc) { + dev_err(&pdev->dev, "Cannot set DMA mask\n"); + goto release_regions; + } + + mdev->mmio.pa = pci_resource_start(pdev, mdev->ops->mmio_bar); + mdev->mmio.len = pci_resource_len(pdev, mdev->ops->mmio_bar); + mdev->mmio.va = pci_ioremap_bar(pdev, mdev->ops->mmio_bar); + if (!mdev->mmio.va) { + dev_err(&pdev->dev, "Cannot remap MMIO BAR\n"); + rc = -EIO; + goto release_regions; + } + + mdev->aper.pa = pci_resource_start(pdev, mdev->ops->aper_bar); + mdev->aper.len = pci_resource_len(pdev, mdev->ops->aper_bar); + mdev->aper.va = ioremap_wc(mdev->aper.pa, mdev->aper.len); + if (!mdev->aper.va) { + dev_err(&pdev->dev, "Cannot remap Aperture BAR\n"); + rc = -EIO; + goto unmap_mmio; + } + + pci_set_drvdata(pdev, mdev); + + mdev->sdev = device_create_with_groups(g_mic_class, &pdev->dev, + MKDEV(MAJOR(g_mic_devno), mdev->id), NULL, + mdev->attr_group, "mic%d", mdev->id); + if (IS_ERR(mdev->sdev)) { + rc = PTR_ERR(mdev->sdev); + dev_err(&pdev->dev, + "device_create_with_groups failed rc %d\n", rc); + goto unmap_aper; + } + return 0; +unmap_aper: + iounmap(mdev->aper.va); +unmap_mmio: + iounmap(mdev->mmio.va); +release_regions: + pci_release_regions(pdev); +disable_device: + pci_disable_device(pdev); +ida_remove: + ida_simple_remove(&g_mic_ida, mdev->id); +ida_fail: + kfree(mdev); +mdev_alloc_fail: + dev_err(&pdev->dev, "Probe failed rc %d\n", rc); + return rc; +} + +/** + * mic_remove - Device Removal Routine + * mic_remove is called by the PCI subsystem to alert the driver + * that it should release a PCI device. + * + * @pdev: PCI device structure + */ +static void mic_remove(struct pci_dev *pdev) +{ + struct mic_device *mdev; + + mdev = pci_get_drvdata(pdev); + if (!mdev) + return; + + device_destroy(g_mic_class, MKDEV(MAJOR(g_mic_devno), mdev->id)); + iounmap(mdev->mmio.va); + iounmap(mdev->aper.va); + pci_release_regions(pdev); + pci_disable_device(pdev); + ida_simple_remove(&g_mic_ida, mdev->id); + kfree(mdev); +} +static struct pci_driver mic_driver = { + .name = mic_driver_name, + .id_table = mic_pci_tbl, + .probe = mic_probe, + .remove = mic_remove +}; + +static int __init mic_init(void) +{ + int ret; + + ret = alloc_chrdev_region(&g_mic_devno, 0, + MIC_MAX_NUM_DEVS, mic_driver_name); + if (ret) { + pr_err("alloc_chrdev_region failed ret %d\n", ret); + goto error; + } + + g_mic_class = class_create(THIS_MODULE, mic_driver_name); + if (IS_ERR(g_mic_class)) { + ret = PTR_ERR(g_mic_class); + pr_err("class_create failed ret %d\n", ret); + goto cleanup_chrdev; + } + + ida_init(&g_mic_ida); + ret = pci_register_driver(&mic_driver); + if (ret) { + pr_err("pci_register_driver failed ret %d\n", ret); + goto class_destroy; + } + return ret; +class_destroy: + class_destroy(g_mic_class); +cleanup_chrdev: + unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS); +error: + return ret; +} + +static void __exit mic_exit(void) +{ + pci_unregister_driver(&mic_driver); + ida_destroy(&g_mic_ida); + class_destroy(g_mic_class); + unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS); +} + +module_init(mic_init); +module_exit(mic_exit); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/mic/host/mic_sysfs.c b/drivers/misc/mic/host/mic_sysfs.c new file mode 100644 index 0000000..972c182 --- /dev/null +++ b/drivers/misc/mic/host/mic_sysfs.c @@ -0,0 +1,97 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * 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. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Intel MIC Host driver. + * + */ +#include <linux/pci.h> + +#include "../common/mic_device.h" +#include "mic_device.h" + +static ssize_t +mic_show_family(struct device *dev, struct device_attribute *attr, char *buf) +{ + static const char x100[] = "x100"; + static const char unknown[] = "Unknown"; + const char *card = NULL; + struct mic_device *mdev = dev_get_drvdata(dev->parent); + + if (!mdev) + return -EINVAL; + + switch (mdev->family) { + case MIC_FAMILY_X100: + card = x100; + break; + default: + card = unknown; + break; + } + return scnprintf(buf, PAGE_SIZE, "%s\n", card); +} +static DEVICE_ATTR(family, S_IRUGO, mic_show_family, NULL); + +static ssize_t +mic_show_stepping(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct mic_device *mdev = dev_get_drvdata(dev->parent); + char *string = "??"; + + if (!mdev) + return -EINVAL; + + switch (mdev->stepping) { + case MIC_A0_STEP: + string = "A0"; + break; + case MIC_B0_STEP: + string = "B0"; + break; + case MIC_B1_STEP: + string = "B1"; + break; + case MIC_C0_STEP: + string = "C0"; + break; + default: + break; + } + return scnprintf(buf, PAGE_SIZE, "%s\n", string); +} +static DEVICE_ATTR(stepping, S_IRUGO, mic_show_stepping, NULL); + +static struct attribute *mic_default_attrs[] = { + &dev_attr_family.attr, + &dev_attr_stepping.attr, + + NULL +}; + +static struct attribute_group mic_attr_group = { + .attrs = mic_default_attrs, +}; + +static const struct attribute_group *__mic_attr_group[] = { + &mic_attr_group, + NULL +}; + +void mic_sysfs_init(struct mic_device *mdev) +{ + mdev->attr_group = __mic_attr_group; +} diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c new file mode 100644 index 0000000..da481b1 --- /dev/null +++ b/drivers/misc/mic/host/mic_x100.c @@ -0,0 +1,75 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * 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. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Intel MIC Host driver. + * + */ +#include <linux/fs.h> +#include <linux/pci.h> + +#include "../common/mic_device.h" +#include "mic_device.h" +#include "mic_x100.h" + +/** + * mic_x100_write_spad - write to the scratchpad register + * @mdev: pointer to mic_device instance + * @idx: index to the scratchpad register, 0 based + * @val: the data value to put into the register + * + * This function allows writing of a 32bit value to the indexed scratchpad + * register. + * + * RETURNS: none. + */ +static void +mic_x100_write_spad(struct mic_device *mdev, unsigned int idx, u32 val) +{ + dev_dbg(mdev->sdev->parent, "Writing 0x%x to scratch pad index %d\n", + val, idx); + mic_mmio_write(&mdev->mmio, val, + MIC_X100_SBOX_BASE_ADDRESS + + MIC_X100_SBOX_SPAD0 + idx * 4); +} + +/** + * mic_x100_read_spad - read from the scratchpad register + * @mdev: pointer to mic_device instance + * @idx: index to scratchpad register, 0 based + * + * This function allows reading of the 32bit scratchpad register. + * + * RETURNS: An appropriate -ERRNO error value on error, or zero for success. + */ +static u32 +mic_x100_read_spad(struct mic_device *mdev, unsigned int idx) +{ + u32 val = mic_mmio_read(&mdev->mmio, + MIC_X100_SBOX_BASE_ADDRESS + + MIC_X100_SBOX_SPAD0 + idx * 4); + + dev_dbg(mdev->sdev->parent, + "Reading 0x%x from scratch pad index %d\n", val, idx); + return val; +} + +struct mic_hw_ops mic_x100_ops = { + .aper_bar = MIC_X100_APER_BAR, + .mmio_bar = MIC_X100_MMIO_BAR, + .read_spad = mic_x100_read_spad, + .write_spad = mic_x100_write_spad, +}; diff --git a/drivers/misc/mic/host/mic_x100.h b/drivers/misc/mic/host/mic_x100.h new file mode 100644 index 0000000..1f4e630 --- /dev/null +++ b/drivers/misc/mic/host/mic_x100.h @@ -0,0 +1,47 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * 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. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Intel MIC Host driver. + * + */ +#ifndef _MIC_X100_HW_H_ +#define _MIC_X100_HW_H_ + +#define MIC_X100_PCI_DEVICE_2250 0x2250 +#define MIC_X100_PCI_DEVICE_2251 0x2251 +#define MIC_X100_PCI_DEVICE_2252 0x2252 +#define MIC_X100_PCI_DEVICE_2253 0x2253 +#define MIC_X100_PCI_DEVICE_2254 0x2254 +#define MIC_X100_PCI_DEVICE_2255 0x2255 +#define MIC_X100_PCI_DEVICE_2256 0x2256 +#define MIC_X100_PCI_DEVICE_2257 0x2257 +#define MIC_X100_PCI_DEVICE_2258 0x2258 +#define MIC_X100_PCI_DEVICE_2259 0x2259 +#define MIC_X100_PCI_DEVICE_225a 0x225a +#define MIC_X100_PCI_DEVICE_225b 0x225b +#define MIC_X100_PCI_DEVICE_225c 0x225c +#define MIC_X100_PCI_DEVICE_225d 0x225d +#define MIC_X100_PCI_DEVICE_225e 0x225e + +#define MIC_X100_APER_BAR 0 +#define MIC_X100_MMIO_BAR 4 + +#define MIC_X100_SBOX_BASE_ADDRESS 0x00010000 +#define MIC_X100_SBOX_SPAD0 0x0000AB20 +extern struct mic_hw_ops mic_x100_ops; + +#endif -- 1.8.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
