*/
-#include <linux/config.h>
#include <linux/kernel.h>
+#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/stat.h>
#include <linux/topology.h>
#include <linux/mm.h>
-
+#include <linux/capability.h>
+#include <linux/pci-aspm.h>
+#include <linux/slab.h>
#include "pci.h"
static int sysfs_initialized; /* = 0 */
pci_config_attr(class, "0x%06x\n");
pci_config_attr(irq, "%u\n");
-static ssize_t local_cpus_show(struct device *dev, struct device_attribute *attr, char *buf)
+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);
+ unsigned long val;
+
+ if (strict_strtoul(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ pdev->broken_parity_status = !!val;
+
+ return count;
+}
+
+static ssize_t local_cpus_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- cpumask_t mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);
- int len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
- strcat(buf,"\n");
- return 1+len;
+ const struct cpumask *mask;
+ int len;
+
+#ifdef CONFIG_NUMA
+ mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
+ cpumask_of_node(dev_to_node(dev));
+#else
+ mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
+#endif
+ len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
+ buf[len++] = '\n';
+ buf[len] = '\0';
+ return len;
+}
+
+
+static ssize_t local_cpulist_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct cpumask *mask;
+ int len;
+
+#ifdef CONFIG_NUMA
+ mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
+ cpumask_of_node(dev_to_node(dev));
+#else
+ mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
+#endif
+ len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
+ buf[len++] = '\n';
+ buf[len] = '\0';
+ return len;
}
/* show resources */
struct pci_dev * pci_dev = to_pci_dev(dev);
char * str = buf;
int i;
- int max = 7;
- u64 start, end;
+ int max;
+ resource_size_t start, end;
if (pci_dev->subordinate)
max = DEVICE_COUNT_RESOURCE;
+ else
+ max = PCI_BRIDGE_RESOURCES;
for (i = 0; i < max; i++) {
struct resource *res = &pci_dev->resource[i];
(u8)(pci_dev->class));
}
+static ssize_t is_enabled_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ unsigned long val;
+ ssize_t result = strict_strtoul(buf, 0, &val);
+
+ if (result < 0)
+ return result;
+
+ /* this can crash the machine when done on the "wrong" device */
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!val) {
+ if (pci_is_enabled(pdev))
+ pci_disable_device(pdev);
+ else
+ result = -EIO;
+ } else
+ 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
+dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
+}
+
+static ssize_t
+consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
+}
+
+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);
+ unsigned long val;
+
+ if (strict_strtoul(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ /* bad things may happen if the no_msi flag is changed
+ * while some drivers are loaded */
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ /* Maybe pci devices without subordinate busses shouldn't even have this
+ * attribute in the first place? */
+ if (!pdev->subordinate)
+ return count;
+
+ /* Is the flag going to change, or keep the value it already had? */
+ if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^
+ !!val) {
+ pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
+
+ dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
+ " bad things could happen\n", val ? "" : " not");
+ }
+
+ return count;
+}
+
+#ifdef CONFIG_HOTPLUG
+static DEFINE_MUTEX(pci_remove_rescan_mutex);
+static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
+ size_t count)
+{
+ unsigned long val;
+ struct pci_bus *b = NULL;
+
+ if (strict_strtoul(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ if (val) {
+ mutex_lock(&pci_remove_rescan_mutex);
+ while ((b = pci_find_next_bus(b)) != NULL)
+ pci_rescan_bus(b);
+ mutex_unlock(&pci_remove_rescan_mutex);
+ }
+ return count;
+}
+
+struct bus_attribute pci_bus_attrs[] = {
+ __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
+ __ATTR_NULL
+};
+
+static ssize_t
+dev_rescan_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long val;
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ if (strict_strtoul(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ if (val) {
+ mutex_lock(&pci_remove_rescan_mutex);
+ pci_rescan_bus(pdev->bus);
+ mutex_unlock(&pci_remove_rescan_mutex);
+ }
+ return count;
+}
+
+static void remove_callback(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ mutex_lock(&pci_remove_rescan_mutex);
+ pci_remove_bus_device(pdev);
+ mutex_unlock(&pci_remove_rescan_mutex);
+}
+
+static ssize_t
+remove_store(struct device *dev, struct device_attribute *dummy,
+ const char *buf, size_t count)
+{
+ int ret = 0;
+ unsigned long val;
+
+ if (strict_strtoul(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ /* An attribute cannot be unregistered by one of its own methods,
+ * so we have to use this roundabout approach.
+ */
+ if (val)
+ ret = device_schedule_callback(dev, remove_callback);
+ if (ret)
+ count = ret;
+ return count;
+}
+#endif
+
struct device_attribute pci_dev_attrs[] = {
__ATTR_RO(resource),
__ATTR_RO(vendor),
__ATTR_RO(class),
__ATTR_RO(irq),
__ATTR_RO(local_cpus),
+ __ATTR_RO(local_cpulist),
__ATTR_RO(modalias),
+#ifdef CONFIG_NUMA
+ __ATTR_RO(numa_node),
+#endif
+ __ATTR_RO(dma_mask_bits),
+ __ATTR_RO(consistent_dma_mask_bits),
+ __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),
+#ifdef CONFIG_HOTPLUG
+ __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
+ __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
+#endif
__ATTR_NULL,
};
static ssize_t
-pci_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ return sprintf(buf, "%u\n",
+ !!(pdev->resource[PCI_ROM_RESOURCE].flags &
+ IORESOURCE_ROM_SHADOW));
+}
+struct device_attribute vga_attr = __ATTR_RO(boot_vga);
+
+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;
if ((off & 1) && size) {
u8 val;
- pci_read_config_byte(dev, off, &val);
+ pci_user_read_config_byte(dev, off, &val);
data[off - init_off] = val;
off++;
size--;
if ((off & 3) && size > 2) {
u16 val;
- pci_read_config_word(dev, off, &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;
while (size > 3) {
u32 val;
- pci_read_config_dword(dev, off, &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;
if (size >= 2) {
u16 val;
- pci_read_config_word(dev, off, &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;
if (size > 0) {
u8 val;
- pci_read_config_byte(dev, off, &val);
+ pci_user_read_config_byte(dev, off, &val);
data[off - init_off] = val;
off++;
--size;
}
static ssize_t
-pci_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+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;
}
if ((off & 1) && size) {
- pci_write_config_byte(dev, off, data[off - init_off]);
+ 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_write_config_word(dev, off, val);
+ pci_user_write_config_word(dev, off, val);
off += 2;
size -= 2;
}
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_write_config_dword(dev, off, val);
+ 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_write_config_word(dev, off, val);
+ pci_user_write_config_word(dev, off, val);
off += 2;
size -= 2;
}
if (size) {
- pci_write_config_byte(dev, off, data[off - init_off]);
+ pci_user_write_config_byte(dev, off, data[off - init_off]);
off++;
--size;
}
return count;
}
+static ssize_t
+read_vpd_attr(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));
+
+ if (off > bin_attr->size)
+ count = 0;
+ else if (count > bin_attr->size - off)
+ count = bin_attr->size - off;
+
+ return pci_read_vpd(dev, off, count, buf);
+}
+
+static ssize_t
+write_vpd_attr(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));
+
+ if (off > bin_attr->size)
+ count = 0;
+ else if (count > bin_attr->size - off)
+ count = bin_attr->size - off;
+
+ return pci_write_vpd(dev, off, count, buf);
+}
+
#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
+ * @bin_attr: struct bin_attribute for this file
* @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, char *buf, loff_t off, size_t count)
+static 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,
+ struct device,
kobj));
/* Only support 1, 2 or 4 byte accesses */
/**
* pci_write_legacy_io - write byte(s) to legacy I/O port space
* @kobj: kobject corresponding to file to read from
+ * @bin_attr: struct bin_attribute for this file
* @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, char *buf, loff_t off, size_t count)
+static 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,
+ struct device,
kobj));
/* Only support 1, 2 or 4 byte accesses */
if (count != 1 && count != 2 && count != 4)
* @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
+ * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
* legacy memory space (first meg of bus space) into application virtual
* memory space.
*/
-int
+static 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,
+ struct device,
kobj));
- return pci_mmap_legacy_page_range(bus, vma);
+ return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
+}
+
+/**
+ * pci_mmap_legacy_io - map legacy PCI IO 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_io_page_range, to mmap
+ * legacy IO space (first meg of bus space) into application virtual
+ * memory space. Returns -ENOSYS if the operation isn't supported
+ */
+static int
+pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr,
+ struct vm_area_struct *vma)
+{
+ struct pci_bus *bus = to_pci_bus(container_of(kobj,
+ struct device,
+ kobj));
+
+ return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
+}
+
+/**
+ * pci_adjust_legacy_attr - adjustment of legacy file attributes
+ * @b: bus to create files under
+ * @mmap_type: I/O port or memory
+ *
+ * Stub implementation. Can be overridden by arch if necessary.
+ */
+void __weak
+pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
+{
+ return;
+}
+
+/**
+ * pci_create_legacy_files - create legacy I/O port and memory files
+ * @b: bus to create files under
+ *
+ * Some platforms allow access to legacy I/O port and ISA memory space on
+ * a per-bus basis. This routine creates the files and ties them into
+ * their associated read, write and mmap files from pci-sysfs.c
+ *
+ * On error unwind, but don't propogate the error to the caller
+ * as it is ok to set up the PCI bus without these files.
+ */
+void pci_create_legacy_files(struct pci_bus *b)
+{
+ int error;
+
+ b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
+ GFP_ATOMIC);
+ if (!b->legacy_io)
+ goto kzalloc_err;
+
+ sysfs_bin_attr_init(b->legacy_io);
+ b->legacy_io->attr.name = "legacy_io";
+ b->legacy_io->size = 0xffff;
+ b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
+ b->legacy_io->read = pci_read_legacy_io;
+ b->legacy_io->write = pci_write_legacy_io;
+ b->legacy_io->mmap = pci_mmap_legacy_io;
+ pci_adjust_legacy_attr(b, pci_mmap_io);
+ error = device_create_bin_file(&b->dev, b->legacy_io);
+ if (error)
+ goto legacy_io_err;
+
+ /* Allocated above after the legacy_io struct */
+ b->legacy_mem = b->legacy_io + 1;
+ sysfs_bin_attr_init(b->legacy_mem);
+ b->legacy_mem->attr.name = "legacy_mem";
+ b->legacy_mem->size = 1024*1024;
+ b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
+ b->legacy_mem->mmap = pci_mmap_legacy_mem;
+ pci_adjust_legacy_attr(b, pci_mmap_mem);
+ error = device_create_bin_file(&b->dev, b->legacy_mem);
+ if (error)
+ goto legacy_mem_err;
+
+ return;
+
+legacy_mem_err:
+ device_remove_bin_file(&b->dev, b->legacy_io);
+legacy_io_err:
+ kfree(b->legacy_io);
+ b->legacy_io = NULL;
+kzalloc_err:
+ printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
+ "and ISA memory resources to sysfs\n");
+ return;
+}
+
+void pci_remove_legacy_files(struct pci_bus *b)
+{
+ if (b->legacy_io) {
+ device_remove_bin_file(&b->dev, b->legacy_io);
+ device_remove_bin_file(&b->dev, b->legacy_mem);
+ kfree(b->legacy_io); /* both are allocated here */
+ }
}
#endif /* HAVE_PCI_LEGACY */
#ifdef HAVE_PCI_MMAP
+
+int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma)
+{
+ unsigned long nr, start, size;
+
+ nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+ start = vma->vm_pgoff;
+ size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
+ if (start < size && size - start >= nr)
+ return 1;
+ WARN(1, "process \"%s\" tried to map 0x%08lx-0x%08lx on %s BAR %d (size 0x%08lx)\n",
+ current->comm, start, start+nr, pci_name(pdev), resno, size);
+ return 0;
+}
+
/**
* 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
+ * @write_combine: 1 for write_combine mapping
*
* 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 vm_area_struct *vma, int write_combine)
{
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;
- u64 start, end;
+ resource_size_t start, end;
int i;
for (i = 0; i < PCI_ROM_RESOURCE; i++)
if (i >= PCI_ROM_RESOURCE)
return -ENODEV;
+ if (!pci_mmap_fits(pdev, i, vma))
+ return -EINVAL;
+
/* 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.
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);
+ if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
+ return -EINVAL;
+
+ return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
+}
+
+static int
+pci_mmap_resource_uc(struct kobject *kobj, struct bin_attribute *attr,
+ struct vm_area_struct *vma)
+{
+ return pci_mmap_resource(kobj, attr, vma, 0);
+}
+
+static int
+pci_mmap_resource_wc(struct kobject *kobj, struct bin_attribute *attr,
+ struct vm_area_struct *vma)
+{
+ return pci_mmap_resource(kobj, attr, vma, 1);
}
/**
- * pci_create_resource_files - create resource files in sysfs for @dev
- * @dev: dev in question
+ * pci_remove_resource_files - cleanup resource files
+ * @pdev: dev to cleanup
*
- * Walk the resources in @dev creating files for each resource available.
+ * If we created resource files for @pdev, remove them from sysfs and
+ * free their resources.
*/
static void
-pci_create_resource_files(struct pci_dev *pdev)
+pci_remove_resource_files(struct pci_dev *pdev)
{
int i;
- /* 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;
+ res_attr = pdev->res_attr[i];
+ if (res_attr) {
+ sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
+ kfree(res_attr);
+ }
- /* allocate attribute structure, piggyback attribute name */
- res_attr = kcalloc(1, sizeof(*res_attr) + 10, GFP_ATOMIC);
+ res_attr = pdev->res_attr_wc[i];
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->attr.owner = THIS_MODULE;
- res_attr->size = pci_resource_len(pdev, i);
- res_attr->mmap = pci_mmap_resource;
- res_attr->private = &pdev->resource[i];
- sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
+ sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
+ kfree(res_attr);
}
}
}
+static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
+{
+ /* allocate attribute structure, piggyback attribute name */
+ int name_len = write_combine ? 13 : 10;
+ struct bin_attribute *res_attr;
+ int retval;
+
+ res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
+ if (res_attr) {
+ char *res_attr_name = (char *)(res_attr + 1);
+
+ sysfs_bin_attr_init(res_attr);
+ if (write_combine) {
+ pdev->res_attr_wc[num] = res_attr;
+ sprintf(res_attr_name, "resource%d_wc", num);
+ res_attr->mmap = pci_mmap_resource_wc;
+ } else {
+ pdev->res_attr[num] = res_attr;
+ sprintf(res_attr_name, "resource%d", num);
+ res_attr->mmap = pci_mmap_resource_uc;
+ }
+ res_attr->attr.name = res_attr_name;
+ res_attr->attr.mode = S_IRUSR | S_IWUSR;
+ res_attr->size = pci_resource_len(pdev, num);
+ res_attr->private = &pdev->resource[num];
+ retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
+ } else
+ retval = -ENOMEM;
+
+ return retval;
+}
+
/**
- * pci_remove_resource_files - cleanup resource files
- * @dev: dev to cleanup
+ * pci_create_resource_files - create resource files in sysfs for @dev
+ * @pdev: dev in question
*
- * If we created resource files for @dev, remove them from sysfs and
- * free their resources.
+ * Walk the resources in @pdev creating files for each resource available.
*/
-static void
-pci_remove_resource_files(struct pci_dev *pdev)
+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;
- res_attr = pdev->res_attr[i];
- if (res_attr) {
- sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
- kfree(res_attr);
+ /* skip empty resources */
+ if (!pci_resource_len(pdev, i))
+ continue;
+
+ retval = pci_create_attr(pdev, i, 0);
+ /* for prefetchable resources, create a WC mappable file */
+ if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
+ retval = pci_create_attr(pdev, i, 1);
+
+ if (retval) {
+ pci_remove_resource_files(pdev);
+ return retval;
}
}
+ return 0;
}
#else /* !HAVE_PCI_MMAP */
-static inline void pci_create_resource_files(struct pci_dev *dev) { return; }
-static inline void pci_remove_resource_files(struct pci_dev *dev) { return; }
+int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
+void __weak 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
+ * @bin_attr: struct bin_attribute for this file
* @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, char *buf, loff_t off, size_t count)
+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));
/**
* pci_read_rom - read a PCI ROM
* @kobj: kernel object handle
+ * @bin_attr: struct bin_attribute for this file
* @buf: where to put the data we read from the ROM
* @off: file offset
* @count: number of bytes to read
* device corresponding to @kobj.
*/
static ssize_t
-pci_read_rom(struct kobject *kobj, char *buf, loff_t off, size_t count)
+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;
return -EINVAL;
rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */
- if (!rom)
- return 0;
+ if (!rom || !size)
+ return -EIO;
if (off >= size)
count = 0;
.attr = {
.name = "config",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
- .size = 256,
+ .size = PCI_CFG_SPACE_SIZE,
.read = pci_read_config,
.write = pci_write_config,
};
.attr = {
.name = "config",
.mode = S_IRUGO | S_IWUSR,
- .owner = THIS_MODULE,
},
- .size = 4096,
+ .size = PCI_CFG_SPACE_EXP_SIZE,
.read = pci_read_config,
.write = pci_write_config,
};
-int pci_create_sysfs_dev_files (struct pci_dev *pdev)
+int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
+{
+ return 0;
+}
+
+static ssize_t reset_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ unsigned long val;
+ ssize_t result = strict_strtoul(buf, 0, &val);
+
+ if (result < 0)
+ return result;
+
+ if (val != 1)
+ return -EINVAL;
+ return pci_reset_function(pdev);
+}
+
+static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
+
+static int pci_create_capabilities_sysfs(struct pci_dev *dev)
+{
+ int retval;
+ struct bin_attribute *attr;
+
+ /* If the device has VPD, try to expose it in sysfs. */
+ if (dev->vpd) {
+ attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+ if (!attr)
+ return -ENOMEM;
+
+ sysfs_bin_attr_init(attr);
+ attr->size = dev->vpd->len;
+ attr->attr.name = "vpd";
+ attr->attr.mode = S_IRUSR | S_IWUSR;
+ attr->read = read_vpd_attr;
+ attr->write = write_vpd_attr;
+ retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
+ if (retval) {
+ kfree(dev->vpd->attr);
+ return retval;
+ }
+ dev->vpd->attr = attr;
+ }
+
+ /* Active State Power Management */
+ pcie_aspm_create_sysfs_dev_files(dev);
+
+ if (!pci_probe_reset_function(dev)) {
+ retval = device_create_file(&dev->dev, &reset_attr);
+ if (retval)
+ goto error;
+ dev->reset_fn = 1;
+ }
+ return 0;
+
+error:
+ pcie_aspm_remove_sysfs_dev_files(dev);
+ if (dev->vpd && dev->vpd->attr) {
+ sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
+ kfree(dev->vpd->attr);
+ }
+
+ return retval;
+}
+
+static void pci_remove_slot_links(struct pci_dev *dev)
+{
+ char func[10];
+ struct pci_slot *slot;
+
+ sysfs_remove_link(&dev->dev.kobj, "slot");
+ list_for_each_entry(slot, &dev->bus->slots, list) {
+ if (slot->number != PCI_SLOT(dev->devfn))
+ continue;
+ snprintf(func, 10, "function%d", PCI_FUNC(dev->devfn));
+ sysfs_remove_link(&slot->kobj, func);
+ }
+}
+
+static int pci_create_slot_links(struct pci_dev *dev)
+{
+ int result = 0;
+ char func[10];
+ struct pci_slot *slot;
+
+ list_for_each_entry(slot, &dev->bus->slots, list) {
+ if (slot->number != PCI_SLOT(dev->devfn))
+ continue;
+ result = sysfs_create_link(&dev->dev.kobj, &slot->kobj, "slot");
+ if (result)
+ goto out;
+ snprintf(func, 10, "function%d", PCI_FUNC(dev->devfn));
+ result = sysfs_create_link(&slot->kobj, &dev->dev.kobj, func);
+ }
+out:
+ return result;
+}
+
+int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
{
+ int retval;
+ int rom_size = 0;
+ struct bin_attribute *attr;
+
if (!sysfs_initialized)
return -EACCES;
- if (pdev->cfg_size < 4096)
- sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
+ if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
+ retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
else
- sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
+ 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_config_file;
- pci_create_resource_files(pdev);
+ if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
+ rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+ else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
+ rom_size = 0x20000;
/* If the device has a ROM, try to expose it in sysfs. */
- if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {
- struct bin_attribute *rom_attr;
-
- rom_attr = kmalloc(sizeof(*rom_attr), GFP_ATOMIC);
- if (rom_attr) {
- memset(rom_attr, 0x00, sizeof(*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->attr.owner = THIS_MODULE;
- rom_attr->read = pci_read_rom;
- rom_attr->write = pci_write_rom;
- sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);
+ if (rom_size) {
+ attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+ if (!attr) {
+ retval = -ENOMEM;
+ goto err_resource_files;
+ }
+ sysfs_bin_attr_init(attr);
+ attr->size = rom_size;
+ attr->attr.name = "rom";
+ attr->attr.mode = S_IRUSR;
+ attr->read = pci_read_rom;
+ attr->write = pci_write_rom;
+ retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
+ if (retval) {
+ kfree(attr);
+ goto err_resource_files;
}
+ pdev->rom_attr = attr;
}
+
+ if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
+ retval = device_create_file(&pdev->dev, &vga_attr);
+ if (retval)
+ goto err_rom_file;
+ }
+
/* add platform-specific attributes */
- pcibios_add_platform_entries(pdev);
-
+ retval = pcibios_add_platform_entries(pdev);
+ if (retval)
+ goto err_vga_file;
+
+ /* add sysfs entries for various capabilities */
+ retval = pci_create_capabilities_sysfs(pdev);
+ if (retval)
+ goto err_vga_file;
+
+ pci_create_slot_links(pdev);
+
return 0;
+
+err_vga_file:
+ if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
+ device_remove_file(&pdev->dev, &vga_attr);
+err_rom_file:
+ if (rom_size) {
+ sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
+ kfree(pdev->rom_attr);
+ pdev->rom_attr = NULL;
+ }
+err_resource_files:
+ pci_remove_resource_files(pdev);
+err_config_file:
+ if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
+ sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
+ else
+ sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
+err:
+ return retval;
+}
+
+static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
+{
+ if (dev->vpd && dev->vpd->attr) {
+ sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
+ kfree(dev->vpd->attr);
+ }
+
+ pcie_aspm_remove_sysfs_dev_files(dev);
+ if (dev->reset_fn) {
+ device_remove_file(&dev->dev, &reset_attr);
+ dev->reset_fn = 0;
+ }
}
/**
*/
void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
{
- if (pdev->cfg_size < 4096)
+ int rom_size = 0;
+
+ if (!sysfs_initialized)
+ return;
+
+ pci_remove_slot_links(pdev);
+
+ pci_remove_capabilities_sysfs(pdev);
+
+ if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
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);
- }
+ if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
+ rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+ else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
+ rom_size = 0x20000;
+
+ if (rom_size && 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)
- pci_create_sysfs_dev_files(pdev);
+ for_each_pci_dev(pdev) {
+ retval = pci_create_sysfs_dev_files(pdev);
+ if (retval) {
+ pci_dev_put(pdev);
+ return retval;
+ }
+ }
return 0;
}
-__initcall(pci_sysfs_init);
+late_initcall(pci_sysfs_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff