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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [pci/] [pci-sysfs.c] - Blame information for rev 65

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/*
 * drivers/pci/pci-sysfs.c
 *
 * (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com>
 * (C) Copyright 2002-2004 IBM Corp.
 * (C) Copyright 2003 Matthew Wilcox
 * (C) Copyright 2003 Hewlett-Packard
 * (C) Copyright 2004 Jon Smirl <jonsmirl@yahoo.com>
 * (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com>
 *
 * File attributes for PCI devices
 *
 * Modeled after usb's driverfs.c
 *
 */
 
 
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/stat.h>
#include <linux/topology.h>
#include <linux/mm.h>
#include <linux/capability.h>
#include "pci.h"
 
static int sysfs_initialized;   /* = 0 */
 
/* show configuration fields */
#define pci_config_attr(field, format_string)                           \
static ssize_t                                                          \
field##_show(struct device *dev, struct device_attribute *attr, char *buf)                              \
{                                                                       \
        struct pci_dev *pdev;                                           \
                                                                        \
        pdev = to_pci_dev (dev);                                        \
        return sprintf (buf, format_string, pdev->field);               \
}
 
pci_config_attr(vendor, "0x%04x\n");
pci_config_attr(device, "0x%04x\n");
pci_config_attr(subsystem_vendor, "0x%04x\n");
pci_config_attr(subsystem_device, "0x%04x\n");
pci_config_attr(class, "0x%06x\n");
pci_config_attr(irq, "%u\n");
 
static ssize_t broken_parity_status_show(struct device *dev,
                                         struct device_attribute *attr,
                                         char *buf)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        return sprintf (buf, "%u\n", pdev->broken_parity_status);
}
 
static ssize_t broken_parity_status_store(struct device *dev,
                                          struct device_attribute *attr,
                                          const char *buf, size_t count)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        ssize_t consumed = -EINVAL;
 
        if ((count > 0) && (*buf == '0' || *buf == '1')) {
                pdev->broken_parity_status = *buf == '1' ? 1 : 0;
                consumed = count;
        }
        return consumed;
}
 
static ssize_t local_cpus_show(struct device *dev,
                        struct device_attribute *attr, char *buf)
{
        cpumask_t mask;
        int len;
 
        mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);
        len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
        strcat(buf,"\n");
        return 1+len;
}
 
/* show resources */
static ssize_t
resource_show(struct device * dev, struct device_attribute *attr, char * buf)
{
        struct pci_dev * pci_dev = to_pci_dev(dev);
        char * str = buf;
        int i;
        int max = 7;
        resource_size_t start, end;
 
        if (pci_dev->subordinate)
                max = DEVICE_COUNT_RESOURCE;
 
        for (i = 0; i < max; i++) {
                struct resource *res =  &pci_dev->resource[i];
                pci_resource_to_user(pci_dev, i, res, &start, &end);
                str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",
                               (unsigned long long)start,
                               (unsigned long long)end,
                               (unsigned long long)res->flags);
        }
        return (str - buf);
}
 
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct pci_dev *pci_dev = to_pci_dev(dev);
 
        return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
                       pci_dev->vendor, pci_dev->device,
                       pci_dev->subsystem_vendor, pci_dev->subsystem_device,
                       (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
                       (u8)(pci_dev->class));
}
 
static ssize_t is_enabled_store(struct device *dev,
                                struct device_attribute *attr, const char *buf,
                                size_t count)
{
        ssize_t result = -EINVAL;
        struct pci_dev *pdev = to_pci_dev(dev);
 
        /* this can crash the machine when done on the "wrong" device */
        if (!capable(CAP_SYS_ADMIN))
                return count;
 
        if (*buf == '0') {
                if (atomic_read(&pdev->enable_cnt) != 0)
                        pci_disable_device(pdev);
                else
                        result = -EIO;
        } else if (*buf == '1')
                result = pci_enable_device(pdev);
 
        return result < 0 ? result : count;
}
 
static ssize_t is_enabled_show(struct device *dev,
                               struct device_attribute *attr, char *buf)
{
        struct pci_dev *pdev;
 
        pdev = to_pci_dev (dev);
        return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
}
 
#ifdef CONFIG_NUMA
static ssize_t
numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        return sprintf (buf, "%d\n", dev->numa_node);
}
#endif
 
static ssize_t
msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct pci_dev *pdev = to_pci_dev(dev);
 
        if (!pdev->subordinate)
                return 0;
 
        return sprintf (buf, "%u\n",
                        !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
}
 
static ssize_t
msi_bus_store(struct device *dev, struct device_attribute *attr,
              const char *buf, size_t count)
{
        struct pci_dev *pdev = to_pci_dev(dev);
 
        /* bad things may happen if the no_msi flag is changed
         * while some drivers are loaded */
        if (!capable(CAP_SYS_ADMIN))
                return count;
 
        if (!pdev->subordinate)
                return count;
 
        if (*buf == '0') {
                pdev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
                dev_warn(&pdev->dev, "forced subordinate bus to not support MSI,"
                         " bad things could happen.\n");
        }
 
        if (*buf == '1') {
                pdev->subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI;
                dev_warn(&pdev->dev, "forced subordinate bus to support MSI,"
                         " bad things could happen.\n");
        }
 
        return count;
}
 
struct device_attribute pci_dev_attrs[] = {
        __ATTR_RO(resource),
        __ATTR_RO(vendor),
        __ATTR_RO(device),
        __ATTR_RO(subsystem_vendor),
        __ATTR_RO(subsystem_device),
        __ATTR_RO(class),
        __ATTR_RO(irq),
        __ATTR_RO(local_cpus),
        __ATTR_RO(modalias),
#ifdef CONFIG_NUMA
        __ATTR_RO(numa_node),
#endif
        __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
        __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
                broken_parity_status_show,broken_parity_status_store),
        __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
        __ATTR_NULL,
};
 
static ssize_t
pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
                char *buf, loff_t off, size_t count)
{
        struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
        unsigned int size = 64;
        loff_t init_off = off;
        u8 *data = (u8*) buf;
 
        /* Several chips lock up trying to read undefined config space */
        if (capable(CAP_SYS_ADMIN)) {
                size = dev->cfg_size;
        } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
                size = 128;
        }
 
        if (off > size)
                return 0;
        if (off + count > size) {
                size -= off;
                count = size;
        } else {
                size = count;
        }
 
        if ((off & 1) && size) {
                u8 val;
                pci_user_read_config_byte(dev, off, &val);
                data[off - init_off] = val;
                off++;
                size--;
        }
 
        if ((off & 3) && size > 2) {
                u16 val;
                pci_user_read_config_word(dev, off, &val);
                data[off - init_off] = val & 0xff;
                data[off - init_off + 1] = (val >> 8) & 0xff;
                off += 2;
                size -= 2;
        }
 
        while (size > 3) {
                u32 val;
                pci_user_read_config_dword(dev, off, &val);
                data[off - init_off] = val & 0xff;
                data[off - init_off + 1] = (val >> 8) & 0xff;
                data[off - init_off + 2] = (val >> 16) & 0xff;
                data[off - init_off + 3] = (val >> 24) & 0xff;
                off += 4;
                size -= 4;
        }
 
        if (size >= 2) {
                u16 val;
                pci_user_read_config_word(dev, off, &val);
                data[off - init_off] = val & 0xff;
                data[off - init_off + 1] = (val >> 8) & 0xff;
                off += 2;
                size -= 2;
        }
 
        if (size > 0) {
                u8 val;
                pci_user_read_config_byte(dev, off, &val);
                data[off - init_off] = val;
                off++;
                --size;
        }
 
        return count;
}
 
static ssize_t
pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
                 char *buf, loff_t off, size_t count)
{
        struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
        unsigned int size = count;
        loff_t init_off = off;
        u8 *data = (u8*) buf;
 
        if (off > dev->cfg_size)
                return 0;
        if (off + count > dev->cfg_size) {
                size = dev->cfg_size - off;
                count = size;
        }
 
        if ((off & 1) && size) {
                pci_user_write_config_byte(dev, off, data[off - init_off]);
                off++;
                size--;
        }
 
        if ((off & 3) && size > 2) {
                u16 val = data[off - init_off];
                val |= (u16) data[off - init_off + 1] << 8;
                pci_user_write_config_word(dev, off, val);
                off += 2;
                size -= 2;
        }
 
        while (size > 3) {
                u32 val = data[off - init_off];
                val |= (u32) data[off - init_off + 1] << 8;
                val |= (u32) data[off - init_off + 2] << 16;
                val |= (u32) data[off - init_off + 3] << 24;
                pci_user_write_config_dword(dev, off, val);
                off += 4;
                size -= 4;
        }
 
        if (size >= 2) {
                u16 val = data[off - init_off];
                val |= (u16) data[off - init_off + 1] << 8;
                pci_user_write_config_word(dev, off, val);
                off += 2;
                size -= 2;
        }
 
        if (size) {
                pci_user_write_config_byte(dev, off, data[off - init_off]);
                off++;
                --size;
        }
 
        return count;
}
 
#ifdef HAVE_PCI_LEGACY
/**
 * pci_read_legacy_io - read byte(s) from legacy I/O port space
 * @kobj: kobject corresponding to file to read from
 * @buf: buffer to store results
 * @off: offset into legacy I/O port space
 * @count: number of bytes to read
 *
 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 * callback routine (pci_legacy_read).
 */
ssize_t
pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
                   char *buf, loff_t off, size_t count)
{
        struct pci_bus *bus = to_pci_bus(container_of(kobj,
                                                      struct class_device,
                                                      kobj));
 
        /* Only support 1, 2 or 4 byte accesses */
        if (count != 1 && count != 2 && count != 4)
                return -EINVAL;
 
        return pci_legacy_read(bus, off, (u32 *)buf, count);
}
 
/**
 * pci_write_legacy_io - write byte(s) to legacy I/O port space
 * @kobj: kobject corresponding to file to read from
 * @buf: buffer containing value to be written
 * @off: offset into legacy I/O port space
 * @count: number of bytes to write
 *
 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 * callback routine (pci_legacy_write).
 */
ssize_t
pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
                    char *buf, loff_t off, size_t count)
{
        struct pci_bus *bus = to_pci_bus(container_of(kobj,
                                                      struct class_device,
                                                      kobj));
        /* Only support 1, 2 or 4 byte accesses */
        if (count != 1 && count != 2 && count != 4)
                return -EINVAL;
 
        return pci_legacy_write(bus, off, *(u32 *)buf, count);
}
 
/**
 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
 * @kobj: kobject corresponding to device to be mapped
 * @attr: struct bin_attribute for this file
 * @vma: struct vm_area_struct passed to mmap
 *
 * Uses an arch specific callback, pci_mmap_legacy_page_range, to mmap
 * legacy memory space (first meg of bus space) into application virtual
 * memory space.
 */
int
pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr,
                    struct vm_area_struct *vma)
{
        struct pci_bus *bus = to_pci_bus(container_of(kobj,
                                                      struct class_device,
                                                      kobj));
 
        return pci_mmap_legacy_page_range(bus, vma);
}
#endif /* HAVE_PCI_LEGACY */
 
#ifdef HAVE_PCI_MMAP
/**
 * pci_mmap_resource - map a PCI resource into user memory space
 * @kobj: kobject for mapping
 * @attr: struct bin_attribute for the file being mapped
 * @vma: struct vm_area_struct passed into the mmap
 *
 * Use the regular PCI mapping routines to map a PCI resource into userspace.
 * FIXME: write combining?  maybe automatic for prefetchable regions?
 */
static int
pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
                  struct vm_area_struct *vma)
{
        struct pci_dev *pdev = to_pci_dev(container_of(kobj,
                                                       struct device, kobj));
        struct resource *res = (struct resource *)attr->private;
        enum pci_mmap_state mmap_type;
        resource_size_t start, end;
        int i;
 
        for (i = 0; i < PCI_ROM_RESOURCE; i++)
                if (res == &pdev->resource[i])
                        break;
        if (i >= PCI_ROM_RESOURCE)
                return -ENODEV;
 
        /* pci_mmap_page_range() expects the same kind of entry as coming
         * from /proc/bus/pci/ which is a "user visible" value. If this is
         * different from the resource itself, arch will do necessary fixup.
         */
        pci_resource_to_user(pdev, i, res, &start, &end);
        vma->vm_pgoff += start >> PAGE_SHIFT;
        mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
 
        return pci_mmap_page_range(pdev, vma, mmap_type, 0);
}
 
/**
 * pci_remove_resource_files - cleanup resource files
 * @dev: dev to cleanup
 *
 * If we created resource files for @dev, remove them from sysfs and
 * free their resources.
 */
static void
pci_remove_resource_files(struct pci_dev *pdev)
{
        int i;
 
        for (i = 0; i < PCI_ROM_RESOURCE; i++) {
                struct bin_attribute *res_attr;
 
                res_attr = pdev->res_attr[i];
                if (res_attr) {
                        sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
                        kfree(res_attr);
                }
        }
}
 
/**
 * pci_create_resource_files - create resource files in sysfs for @dev
 * @dev: dev in question
 *
 * Walk the resources in @dev creating files for each resource available.
 */
static int pci_create_resource_files(struct pci_dev *pdev)
{
        int i;
        int retval;
 
        /* Expose the PCI resources from this device as files */
        for (i = 0; i < PCI_ROM_RESOURCE; i++) {
                struct bin_attribute *res_attr;
 
                /* skip empty resources */
                if (!pci_resource_len(pdev, i))
                        continue;
 
                /* allocate attribute structure, piggyback attribute name */
                res_attr = kzalloc(sizeof(*res_attr) + 10, GFP_ATOMIC);
                if (res_attr) {
                        char *res_attr_name = (char *)(res_attr + 1);
 
                        pdev->res_attr[i] = res_attr;
                        sprintf(res_attr_name, "resource%d", i);
                        res_attr->attr.name = res_attr_name;
                        res_attr->attr.mode = S_IRUSR | S_IWUSR;
                        res_attr->size = pci_resource_len(pdev, i);
                        res_attr->mmap = pci_mmap_resource;
                        res_attr->private = &pdev->resource[i];
                        retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
                        if (retval) {
                                pci_remove_resource_files(pdev);
                                return retval;
                        }
                } else {
                        return -ENOMEM;
                }
        }
        return 0;
}
#else /* !HAVE_PCI_MMAP */
static inline int pci_create_resource_files(struct pci_dev *dev) { return 0; }
static inline void pci_remove_resource_files(struct pci_dev *dev) { return; }
#endif /* HAVE_PCI_MMAP */
 
/**
 * pci_write_rom - used to enable access to the PCI ROM display
 * @kobj: kernel object handle
 * @buf: user input
 * @off: file offset
 * @count: number of byte in input
 *
 * writing anything except 0 enables it
 */
static ssize_t
pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
              char *buf, loff_t off, size_t count)
{
        struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
 
        if ((off ==  0) && (*buf == '0') && (count == 2))
                pdev->rom_attr_enabled = 0;
        else
                pdev->rom_attr_enabled = 1;
 
        return count;
}
 
/**
 * pci_read_rom - read a PCI ROM
 * @kobj: kernel object handle
 * @buf: where to put the data we read from the ROM
 * @off: file offset
 * @count: number of bytes to read
 *
 * Put @count bytes starting at @off into @buf from the ROM in the PCI
 * device corresponding to @kobj.
 */
static ssize_t
pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
             char *buf, loff_t off, size_t count)
{
        struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
        void __iomem *rom;
        size_t size;
 
        if (!pdev->rom_attr_enabled)
                return -EINVAL;
 
        rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
        if (!rom)
                return 0;
 
        if (off >= size)
                count = 0;
        else {
                if (off + count > size)
                        count = size - off;
 
                memcpy_fromio(buf, rom + off, count);
        }
        pci_unmap_rom(pdev, rom);
 
        return count;
}
 
static struct bin_attribute pci_config_attr = {
        .attr = {
                .name = "config",
                .mode = S_IRUGO | S_IWUSR,
        },
        .size = 256,
        .read = pci_read_config,
        .write = pci_write_config,
};
 
static struct bin_attribute pcie_config_attr = {
        .attr = {
                .name = "config",
                .mode = S_IRUGO | S_IWUSR,
        },
        .size = 4096,
        .read = pci_read_config,
        .write = pci_write_config,
};
 
int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
{
        return 0;
}
 
int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
{
        struct bin_attribute *rom_attr = NULL;
        int retval;
 
        if (!sysfs_initialized)
                return -EACCES;
 
        if (pdev->cfg_size < 4096)
                retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
        else
                retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
        if (retval)
                goto err;
 
        retval = pci_create_resource_files(pdev);
        if (retval)
                goto err_bin_file;
 
        /* If the device has a ROM, try to expose it in sysfs. */
        if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
            (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
                rom_attr = kzalloc(sizeof(*rom_attr), GFP_ATOMIC);
                if (rom_attr) {
                        pdev->rom_attr = rom_attr;
                        rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
                        rom_attr->attr.name = "rom";
                        rom_attr->attr.mode = S_IRUSR;
                        rom_attr->read = pci_read_rom;
                        rom_attr->write = pci_write_rom;
                        retval = sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);
                        if (retval)
                                goto err_rom;
                } else {
                        retval = -ENOMEM;
                        goto err_resource_files;
                }
        }
        /* add platform-specific attributes */
        if (pcibios_add_platform_entries(pdev))
                goto err_rom_file;
 
        return 0;
 
err_rom_file:
        if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
                sysfs_remove_bin_file(&pdev->dev.kobj, rom_attr);
err_rom:
        kfree(rom_attr);
err_resource_files:
        pci_remove_resource_files(pdev);
err_bin_file:
        if (pdev->cfg_size < 4096)
                sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
        else
                sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
err:
        return retval;
}
 
/**
 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
 * @pdev: device whose entries we should free
 *
 * Cleanup when @pdev is removed from sysfs.
 */
void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
{
        if (!sysfs_initialized)
                return;
 
        if (pdev->cfg_size < 4096)
                sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
        else
                sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
 
        pci_remove_resource_files(pdev);
 
        if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {
                if (pdev->rom_attr) {
                        sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
                        kfree(pdev->rom_attr);
                }
        }
}
 
static int __init pci_sysfs_init(void)
{
        struct pci_dev *pdev = NULL;
        int retval;
 
        sysfs_initialized = 1;
        for_each_pci_dev(pdev) {
                retval = pci_create_sysfs_dev_files(pdev);
                if (retval) {
                        pci_dev_put(pdev);
                        return retval;
                }
        }
 
        return 0;
}
 
late_initcall(pci_sysfs_init);

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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [pci/] [pci-sysfs.c] - Blame information for rev 65

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* drivers/pci/pci-sysfs.c`
3			`*`
4			`* (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com>`
5			`* (C) Copyright 2002-2004 IBM Corp.`
6			`* (C) Copyright 2003 Matthew Wilcox`
7			`* (C) Copyright 2003 Hewlett-Packard`
8			`* (C) Copyright 2004 Jon Smirl <jonsmirl@yahoo.com>`
9			`* (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com>`
10			`*`
11			`* File attributes for PCI devices`
12			`*`
13			`* Modeled after usb's driverfs.c`
14			`*`
15			`*/`
16
17
18			`#include <linux/kernel.h>`
19			`#include <linux/pci.h>`
20			`#include <linux/stat.h>`
21			`#include <linux/topology.h>`
22			`#include <linux/mm.h>`
23			`#include <linux/capability.h>`
24			`#include "pci.h"`
25
26			`static int sysfs_initialized; /* = 0 */`
27
28			`/* show configuration fields */`
29			`#define pci_config_attr(field, format_string) \`
30			`static ssize_t \`
31			`field##_show(struct device dev, struct device_attribute attr, char *buf) \`
32			`{ \`
33			`struct pci_dev *pdev; \`
34			`\`
35			`pdev = to_pci_dev (dev); \`
36			`return sprintf (buf, format_string, pdev->field); \`
37			`}`
38
39			`pci_config_attr(vendor, "0x%04x\n");`
40			`pci_config_attr(device, "0x%04x\n");`
41			`pci_config_attr(subsystem_vendor, "0x%04x\n");`
42			`pci_config_attr(subsystem_device, "0x%04x\n");`
43			`pci_config_attr(class, "0x%06x\n");`
44			`pci_config_attr(irq, "%u\n");`
45
46			`static ssize_t broken_parity_status_show(struct device *dev,`
47			`struct device_attribute *attr,`
48			`char *buf)`
49			`{`
50			`struct pci_dev *pdev = to_pci_dev(dev);`
51			`return sprintf (buf, "%u\n", pdev->broken_parity_status);`
52			`}`
53
54			`static ssize_t broken_parity_status_store(struct device *dev,`
55			`struct device_attribute *attr,`
56			`const char *buf, size_t count)`
57			`{`
58			`struct pci_dev *pdev = to_pci_dev(dev);`
59			`ssize_t consumed = -EINVAL;`
60
61			`if ((count > 0) && (buf == '0' \|\| buf == '1')) {`
62			`pdev->broken_parity_status = *buf == '1' ? 1 : 0;`
63			`consumed = count;`
64			`}`
65			`return consumed;`
66			`}`
67
68			`static ssize_t local_cpus_show(struct device *dev,`
69			`struct device_attribute attr, char buf)`
70			`{`
71			`cpumask_t mask;`
72			`int len;`
73
74			`mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);`
75			`len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);`
76			`strcat(buf,"\n");`
77			`return 1+len;`
78			`}`
79
80			`/* show resources */`
81			`static ssize_t`
82			`resource_show(struct device * dev, struct device_attribute attr, char buf)`
83			`{`
84			`struct pci_dev * pci_dev = to_pci_dev(dev);`
85			`char * str = buf;`
86			`int i;`
87			`int max = 7;`
88			`resource_size_t start, end;`
89
90			`if (pci_dev->subordinate)`
91			`max = DEVICE_COUNT_RESOURCE;`
92
93			`for (i = 0; i < max; i++) {`
94			`struct resource *res = &pci_dev->resource[i];`
95			`pci_resource_to_user(pci_dev, i, res, &start, &end);`
96			`str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",`
97			`(unsigned long long)start,`
98			`(unsigned long long)end,`
99			`(unsigned long long)res->flags);`
100			`}`
101			`return (str - buf);`
102			`}`
103
104			`static ssize_t modalias_show(struct device dev, struct device_attribute attr, char *buf)`
105			`{`
106			`struct pci_dev *pci_dev = to_pci_dev(dev);`
107
108			`return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",`
109			`pci_dev->vendor, pci_dev->device,`
110			`pci_dev->subsystem_vendor, pci_dev->subsystem_device,`
111			`(u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),`
112			`(u8)(pci_dev->class));`
113			`}`
114
115			`static ssize_t is_enabled_store(struct device *dev,`
116			`struct device_attribute attr, const char buf,`
117			`size_t count)`
118			`{`
119			`ssize_t result = -EINVAL;`
120			`struct pci_dev *pdev = to_pci_dev(dev);`
121
122			`/* this can crash the machine when done on the "wrong" device */`
123			`if (!capable(CAP_SYS_ADMIN))`
124			`return count;`
125
126			`if (*buf == '0') {`
127			`if (atomic_read(&pdev->enable_cnt) != 0)`
128			`pci_disable_device(pdev);`
129			`else`
130			`result = -EIO;`
131			`} else if (*buf == '1')`
132			`result = pci_enable_device(pdev);`
133
134			`return result < 0 ? result : count;`
135			`}`
136
137			`static ssize_t is_enabled_show(struct device *dev,`
138			`struct device_attribute attr, char buf)`
139			`{`
140			`struct pci_dev *pdev;`
141
142			`pdev = to_pci_dev (dev);`
143			`return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));`
144			`}`
145
146			`#ifdef CONFIG_NUMA`
147			`static ssize_t`
148			`numa_node_show(struct device dev, struct device_attribute attr, char *buf)`
149			`{`
150			`return sprintf (buf, "%d\n", dev->numa_node);`
151			`}`
152			`#endif`
153
154			`static ssize_t`
155			`msi_bus_show(struct device dev, struct device_attribute attr, char *buf)`
156			`{`
157			`struct pci_dev *pdev = to_pci_dev(dev);`
158
159			`if (!pdev->subordinate)`
160			`return 0;`
161
162			`return sprintf (buf, "%u\n",`
163			`!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));`
164			`}`
165
166			`static ssize_t`
167			`msi_bus_store(struct device dev, struct device_attribute attr,`
168			`const char *buf, size_t count)`
169			`{`
170			`struct pci_dev *pdev = to_pci_dev(dev);`
171
172			`/* bad things may happen if the no_msi flag is changed`
173			`* while some drivers are loaded */`
174			`if (!capable(CAP_SYS_ADMIN))`
175			`return count;`
176
177			`if (!pdev->subordinate)`
178			`return count;`
179
180			`if (*buf == '0') {`
181			`pdev->subordinate->bus_flags \|= PCI_BUS_FLAGS_NO_MSI;`
182			`dev_warn(&pdev->dev, "forced subordinate bus to not support MSI,"`
183			`" bad things could happen.\n");`
184			`}`
185
186			`if (*buf == '1') {`
187			`pdev->subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI;`
188			`dev_warn(&pdev->dev, "forced subordinate bus to support MSI,"`
189			`" bad things could happen.\n");`
190			`}`
191
192			`return count;`
193			`}`
194
195			`struct device_attribute pci_dev_attrs[] = {`
196			`__ATTR_RO(resource),`
197			`__ATTR_RO(vendor),`
198			`__ATTR_RO(device),`
199			`__ATTR_RO(subsystem_vendor),`
200			`__ATTR_RO(subsystem_device),`
201			`__ATTR_RO(class),`
202			`__ATTR_RO(irq),`
203			`__ATTR_RO(local_cpus),`
204			`__ATTR_RO(modalias),`
205			`#ifdef CONFIG_NUMA`
206			`__ATTR_RO(numa_node),`
207			`#endif`
208			`__ATTR(enable, 0600, is_enabled_show, is_enabled_store),`
209			`__ATTR(broken_parity_status,(S_IRUGO\|S_IWUSR),`
210			`broken_parity_status_show,broken_parity_status_store),`
211			`__ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),`
212			`__ATTR_NULL,`
213			`};`
214
215			`static ssize_t`
216			`pci_read_config(struct kobject kobj, struct bin_attribute bin_attr,`
217			`char *buf, loff_t off, size_t count)`
218			`{`
219			`struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));`
220			`unsigned int size = 64;`
221			`loff_t init_off = off;`
222			`u8 data = (u8) buf;`
223
224			`/* Several chips lock up trying to read undefined config space */`
225			`if (capable(CAP_SYS_ADMIN)) {`
226			`size = dev->cfg_size;`
227			`} else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {`
228			`size = 128;`
229			`}`
230
231			`if (off > size)`
232			`return 0;`
233			`if (off + count > size) {`
234			`size -= off;`
235			`count = size;`
236			`} else {`
237			`size = count;`
238			`}`
239
240			`if ((off & 1) && size) {`
241			`u8 val;`
242			`pci_user_read_config_byte(dev, off, &val);`
243			`data[off - init_off] = val;`
244			`off++;`
245			`size--;`
246			`}`
247
248			`if ((off & 3) && size > 2) {`
249			`u16 val;`
250			`pci_user_read_config_word(dev, off, &val);`
251			`data[off - init_off] = val & 0xff;`
252			`data[off - init_off + 1] = (val >> 8) & 0xff;`
253			`off += 2;`
254			`size -= 2;`
255			`}`
256
257			`while (size > 3) {`
258			`u32 val;`
259			`pci_user_read_config_dword(dev, off, &val);`
260			`data[off - init_off] = val & 0xff;`
261			`data[off - init_off + 1] = (val >> 8) & 0xff;`
262			`data[off - init_off + 2] = (val >> 16) & 0xff;`
263			`data[off - init_off + 3] = (val >> 24) & 0xff;`
264			`off += 4;`
265			`size -= 4;`
266			`}`
267
268			`if (size >= 2) {`
269			`u16 val;`
270			`pci_user_read_config_word(dev, off, &val);`
271			`data[off - init_off] = val & 0xff;`
272			`data[off - init_off + 1] = (val >> 8) & 0xff;`
273			`off += 2;`
274			`size -= 2;`
275			`}`
276
277			`if (size > 0) {`
278			`u8 val;`
279			`pci_user_read_config_byte(dev, off, &val);`
280			`data[off - init_off] = val;`
281			`off++;`
282			`--size;`
283			`}`
284
285			`return count;`
286			`}`
287
288			`static ssize_t`
289			`pci_write_config(struct kobject kobj, struct bin_attribute bin_attr,`
290			`char *buf, loff_t off, size_t count)`
291			`{`
292			`struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));`
293			`unsigned int size = count;`
294			`loff_t init_off = off;`
295			`u8 data = (u8) buf;`
296
297			`if (off > dev->cfg_size)`
298			`return 0;`
299			`if (off + count > dev->cfg_size) {`
300			`size = dev->cfg_size - off;`
301			`count = size;`
302			`}`
303
304			`if ((off & 1) && size) {`
305			`pci_user_write_config_byte(dev, off, data[off - init_off]);`
306			`off++;`
307			`size--;`
308			`}`
309
310			`if ((off & 3) && size > 2) {`
311			`u16 val = data[off - init_off];`
312			`val \|= (u16) data[off - init_off + 1] << 8;`
313			`pci_user_write_config_word(dev, off, val);`
314			`off += 2;`
315			`size -= 2;`
316			`}`
317
318			`while (size > 3) {`
319			`u32 val = data[off - init_off];`
320			`val \|= (u32) data[off - init_off + 1] << 8;`
321			`val \|= (u32) data[off - init_off + 2] << 16;`
322			`val \|= (u32) data[off - init_off + 3] << 24;`
323			`pci_user_write_config_dword(dev, off, val);`
324			`off += 4;`
325			`size -= 4;`
326			`}`
327
328			`if (size >= 2) {`
329			`u16 val = data[off - init_off];`
330			`val \|= (u16) data[off - init_off + 1] << 8;`
331			`pci_user_write_config_word(dev, off, val);`
332			`off += 2;`
333			`size -= 2;`
334			`}`
335
336			`if (size) {`
337			`pci_user_write_config_byte(dev, off, data[off - init_off]);`
338			`off++;`
339			`--size;`
340			`}`
341
342			`return count;`
343			`}`
344
345			`#ifdef HAVE_PCI_LEGACY`
346			`/**`
347			`* pci_read_legacy_io - read byte(s) from legacy I/O port space`
348			`* @kobj: kobject corresponding to file to read from`
349			`* @buf: buffer to store results`
350			`* @off: offset into legacy I/O port space`
351			`* @count: number of bytes to read`
352			`*`
353			`* Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific`
354			`* callback routine (pci_legacy_read).`
355			`*/`
356			`ssize_t`
357			`pci_read_legacy_io(struct kobject kobj, struct bin_attribute bin_attr,`
358			`char *buf, loff_t off, size_t count)`
359			`{`
360			`struct pci_bus *bus = to_pci_bus(container_of(kobj,`
361			`struct class_device,`
362			`kobj));`
363
364			`/* Only support 1, 2 or 4 byte accesses */`
365			`if (count != 1 && count != 2 && count != 4)`
366			`return -EINVAL;`
367
368			`return pci_legacy_read(bus, off, (u32 *)buf, count);`
369			`}`
370
371			`/**`
372			`* pci_write_legacy_io - write byte(s) to legacy I/O port space`
373			`* @kobj: kobject corresponding to file to read from`
374			`* @buf: buffer containing value to be written`
375			`* @off: offset into legacy I/O port space`
376			`* @count: number of bytes to write`
377			`*`
378			`* Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific`
379			`* callback routine (pci_legacy_write).`
380			`*/`
381			`ssize_t`
382			`pci_write_legacy_io(struct kobject kobj, struct bin_attribute bin_attr,`
383			`char *buf, loff_t off, size_t count)`
384			`{`
385			`struct pci_bus *bus = to_pci_bus(container_of(kobj,`
386			`struct class_device,`
387			`kobj));`
388			`/* Only support 1, 2 or 4 byte accesses */`
389			`if (count != 1 && count != 2 && count != 4)`
390			`return -EINVAL;`
391
392			`return pci_legacy_write(bus, off, (u32 )buf, count);`
393			`}`
394
395			`/**`
396			`* pci_mmap_legacy_mem - map legacy PCI memory into user memory space`
397			`* @kobj: kobject corresponding to device to be mapped`
398			`* @attr: struct bin_attribute for this file`
399			`* @vma: struct vm_area_struct passed to mmap`
400			`*`
401			`* Uses an arch specific callback, pci_mmap_legacy_page_range, to mmap`
402			`* legacy memory space (first meg of bus space) into application virtual`
403			`* memory space.`
404			`*/`
405			`int`
406			`pci_mmap_legacy_mem(struct kobject kobj, struct bin_attribute attr,`
407			`struct vm_area_struct *vma)`
408			`{`
409			`struct pci_bus *bus = to_pci_bus(container_of(kobj,`
410			`struct class_device,`
411			`kobj));`
412
413			`return pci_mmap_legacy_page_range(bus, vma);`
414			`}`
415			`#endif /* HAVE_PCI_LEGACY */`
416
417			`#ifdef HAVE_PCI_MMAP`
418			`/**`
419			`* pci_mmap_resource - map a PCI resource into user memory space`
420			`* @kobj: kobject for mapping`
421			`* @attr: struct bin_attribute for the file being mapped`
422			`* @vma: struct vm_area_struct passed into the mmap`
423			`*`
424			`* Use the regular PCI mapping routines to map a PCI resource into userspace.`
425			`* FIXME: write combining? maybe automatic for prefetchable regions?`
426			`*/`
427			`static int`
428			`pci_mmap_resource(struct kobject kobj, struct bin_attribute attr,`
429			`struct vm_area_struct *vma)`
430			`{`
431			`struct pci_dev *pdev = to_pci_dev(container_of(kobj,`
432			`struct device, kobj));`
433			`struct resource res = (struct resource )attr->private;`
434			`enum pci_mmap_state mmap_type;`
435			`resource_size_t start, end;`
436			`int i;`
437
438			`for (i = 0; i < PCI_ROM_RESOURCE; i++)`
439			`if (res == &pdev->resource[i])`
440			`break;`
441			`if (i >= PCI_ROM_RESOURCE)`
442			`return -ENODEV;`
443
444			`/* pci_mmap_page_range() expects the same kind of entry as coming`
445			`* from /proc/bus/pci/ which is a "user visible" value. If this is`
446			`* different from the resource itself, arch will do necessary fixup.`
447			`*/`
448			`pci_resource_to_user(pdev, i, res, &start, &end);`
449			`vma->vm_pgoff += start >> PAGE_SHIFT;`
450			`mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;`
451
452			`return pci_mmap_page_range(pdev, vma, mmap_type, 0);`
453			`}`
454
455			`/**`
456			`* pci_remove_resource_files - cleanup resource files`
457			`* @dev: dev to cleanup`
458			`*`
459			`* If we created resource files for @dev, remove them from sysfs and`
460			`* free their resources.`
461			`*/`
462			`static void`
463			`pci_remove_resource_files(struct pci_dev *pdev)`
464			`{`
465			`int i;`
466
467			`for (i = 0; i < PCI_ROM_RESOURCE; i++) {`
468			`struct bin_attribute *res_attr;`
469
470			`res_attr = pdev->res_attr[i];`
471			`if (res_attr) {`
472			`sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);`
473			`kfree(res_attr);`
474			`}`
475			`}`
476			`}`
477
478			`/**`
479			`* pci_create_resource_files - create resource files in sysfs for @dev`
480			`* @dev: dev in question`
481			`*`
482			`* Walk the resources in @dev creating files for each resource available.`
483			`*/`
484			`static int pci_create_resource_files(struct pci_dev *pdev)`
485			`{`
486			`int i;`
487			`int retval;`
488
489			`/* Expose the PCI resources from this device as files */`
490			`for (i = 0; i < PCI_ROM_RESOURCE; i++) {`
491			`struct bin_attribute *res_attr;`
492
493			`/* skip empty resources */`
494			`if (!pci_resource_len(pdev, i))`
495			`continue;`
496
497			`/* allocate attribute structure, piggyback attribute name */`
498			`res_attr = kzalloc(sizeof(*res_attr) + 10, GFP_ATOMIC);`
499			`if (res_attr) {`
500			`char res_attr_name = (char )(res_attr + 1);`
501
502			`pdev->res_attr[i] = res_attr;`
503			`sprintf(res_attr_name, "resource%d", i);`
504			`res_attr->attr.name = res_attr_name;`
505			`res_attr->attr.mode = S_IRUSR \| S_IWUSR;`
506			`res_attr->size = pci_resource_len(pdev, i);`
507			`res_attr->mmap = pci_mmap_resource;`
508			`res_attr->private = &pdev->resource[i];`
509			`retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);`
510			`if (retval) {`
511			`pci_remove_resource_files(pdev);`
512			`return retval;`
513			`}`
514			`} else {`
515			`return -ENOMEM;`
516			`}`
517			`}`
518			`return 0;`
519			`}`
520			`#else /* !HAVE_PCI_MMAP */`
521			`static inline int pci_create_resource_files(struct pci_dev *dev) { return 0; }`
522			`static inline void pci_remove_resource_files(struct pci_dev *dev) { return; }`
523			`#endif /* HAVE_PCI_MMAP */`
524
525			`/**`
526			`* pci_write_rom - used to enable access to the PCI ROM display`
527			`* @kobj: kernel object handle`
528			`* @buf: user input`
529			`* @off: file offset`
530			`* @count: number of byte in input`
531			`*`
532			`* writing anything except 0 enables it`
533			`*/`
534			`static ssize_t`
535			`pci_write_rom(struct kobject kobj, struct bin_attribute bin_attr,`
536			`char *buf, loff_t off, size_t count)`
537			`{`
538			`struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));`
539
540			`if ((off == 0) && (*buf == '0') && (count == 2))`
541			`pdev->rom_attr_enabled = 0;`
542			`else`
543			`pdev->rom_attr_enabled = 1;`
544
545			`return count;`
546			`}`
547
548			`/**`
549			`* pci_read_rom - read a PCI ROM`
550			`* @kobj: kernel object handle`
551			`* @buf: where to put the data we read from the ROM`
552			`* @off: file offset`
553			`* @count: number of bytes to read`
554			`*`
555			`* Put @count bytes starting at @off into @buf from the ROM in the PCI`
556			`* device corresponding to @kobj.`
557			`*/`
558			`static ssize_t`
559			`pci_read_rom(struct kobject kobj, struct bin_attribute bin_attr,`
560			`char *buf, loff_t off, size_t count)`
561			`{`
562			`struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));`
563			`void __iomem *rom;`
564			`size_t size;`
565
566			`if (!pdev->rom_attr_enabled)`
567			`return -EINVAL;`
568
569			`rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */`
570			`if (!rom)`
571			`return 0;`
572
573			`if (off >= size)`
574			`count = 0;`
575			`else {`
576			`if (off + count > size)`
577			`count = size - off;`
578
579			`memcpy_fromio(buf, rom + off, count);`
580			`}`
581			`pci_unmap_rom(pdev, rom);`
582
583			`return count;`
584			`}`
585
586			`static struct bin_attribute pci_config_attr = {`
587			`.attr = {`
588			`.name = "config",`
589			`.mode = S_IRUGO \| S_IWUSR,`
590			`},`
591			`.size = 256,`
592			`.read = pci_read_config,`
593			`.write = pci_write_config,`
594			`};`
595
596			`static struct bin_attribute pcie_config_attr = {`
597			`.attr = {`
598			`.name = "config",`
599			`.mode = S_IRUGO \| S_IWUSR,`
600			`},`
601			`.size = 4096,`
602			`.read = pci_read_config,`
603			`.write = pci_write_config,`
604			`};`
605
606			`int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)`
607			`{`
608			`return 0;`
609			`}`
610
611			`int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)`
612			`{`
613			`struct bin_attribute *rom_attr = NULL;`
614			`int retval;`
615
616			`if (!sysfs_initialized)`
617			`return -EACCES;`
618
619			`if (pdev->cfg_size < 4096)`
620			`retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);`
621			`else`
622			`retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);`
623			`if (retval)`
624			`goto err;`
625
626			`retval = pci_create_resource_files(pdev);`
627			`if (retval)`
628			`goto err_bin_file;`
629
630			`/* If the device has a ROM, try to expose it in sysfs. */`
631			`if (pci_resource_len(pdev, PCI_ROM_RESOURCE) \|\|`
632			`(pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {`
633			`rom_attr = kzalloc(sizeof(*rom_attr), GFP_ATOMIC);`
634			`if (rom_attr) {`
635			`pdev->rom_attr = rom_attr;`
636			`rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);`
637			`rom_attr->attr.name = "rom";`
638			`rom_attr->attr.mode = S_IRUSR;`
639			`rom_attr->read = pci_read_rom;`
640			`rom_attr->write = pci_write_rom;`
641			`retval = sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);`
642			`if (retval)`
643			`goto err_rom;`
644			`} else {`
645			`retval = -ENOMEM;`
646			`goto err_resource_files;`
647			`}`
648			`}`
649			`/* add platform-specific attributes */`
650			`if (pcibios_add_platform_entries(pdev))`
651			`goto err_rom_file;`
652
653			`return 0;`
654
655			`err_rom_file:`
656			`if (pci_resource_len(pdev, PCI_ROM_RESOURCE))`
657			`sysfs_remove_bin_file(&pdev->dev.kobj, rom_attr);`
658			`err_rom:`
659			`kfree(rom_attr);`
660			`err_resource_files:`
661			`pci_remove_resource_files(pdev);`
662			`err_bin_file:`
663			`if (pdev->cfg_size < 4096)`
664			`sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);`
665			`else`
666			`sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);`
667			`err:`
668			`return retval;`
669			`}`
670
671			`/**`
672			`* pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files`
673			`* @pdev: device whose entries we should free`
674			`*`
675			`* Cleanup when @pdev is removed from sysfs.`
676			`*/`
677			`void pci_remove_sysfs_dev_files(struct pci_dev *pdev)`
678			`{`
679			`if (!sysfs_initialized)`
680			`return;`
681
682			`if (pdev->cfg_size < 4096)`
683			`sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);`
684			`else`
685			`sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);`
686
687			`pci_remove_resource_files(pdev);`
688
689			`if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {`
690			`if (pdev->rom_attr) {`
691			`sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);`
692			`kfree(pdev->rom_attr);`
693			`}`
694			`}`
695			`}`
696
697			`static int __init pci_sysfs_init(void)`
698			`{`
699			`struct pci_dev *pdev = NULL;`
700			`int retval;`
701
702			`sysfs_initialized = 1;`
703			`for_each_pci_dev(pdev) {`
704			`retval = pci_create_sysfs_dev_files(pdev);`
705			`if (retval) {`
706			`pci_dev_put(pdev);`
707			`return retval;`
708			`}`
709			`}`
710
711			`return 0;`
712			`}`
713
714			`late_initcall(pci_sysfs_init);`