diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 1758 |
1 files changed, 1758 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c new file mode 100644 index 000000000..1edf5a183 --- /dev/null +++ b/drivers/pci/pci-sysfs.c @@ -0,0 +1,1758 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * (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/sched.h> +#include <linux/pci.h> +#include <linux/stat.h> +#include <linux/export.h> +#include <linux/topology.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/capability.h> +#include <linux/security.h> +#include <linux/slab.h> +#include <linux/vgaarb.h> +#include <linux/pm_runtime.h> +#include <linux/of.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); \ +} \ +static DEVICE_ATTR_RO(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(revision, "0x%02x\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); + unsigned long val; + + if (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + pdev->broken_parity_status = !!val; + + return count; +} +static DEVICE_ATTR_RW(broken_parity_status); + +static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list, + struct device_attribute *attr, char *buf) +{ + const struct cpumask *mask; + +#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 + return cpumap_print_to_pagebuf(list, buf, mask); +} + +static ssize_t local_cpus_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return pci_dev_show_local_cpu(dev, false, attr, buf); +} +static DEVICE_ATTR_RO(local_cpus); + +static ssize_t local_cpulist_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return pci_dev_show_local_cpu(dev, true, attr, buf); +} +static DEVICE_ATTR_RO(local_cpulist); + +/* + * PCI Bus Class Devices + */ +static ssize_t cpuaffinity_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); + + return cpumap_print_to_pagebuf(false, buf, cpumask); +} +static DEVICE_ATTR_RO(cpuaffinity); + +static ssize_t cpulistaffinity_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); + + return cpumap_print_to_pagebuf(true, buf, cpumask); +} +static DEVICE_ATTR_RO(cpulistaffinity); + +/* 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; + 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]; + 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 DEVICE_ATTR_RO(resource); + +static ssize_t max_link_speed_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%s\n", PCIE_SPEED2STR(pcie_get_speed_cap(pdev))); +} +static DEVICE_ATTR_RO(max_link_speed); + +static ssize_t max_link_width_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%u\n", pcie_get_width_cap(pdev)); +} +static DEVICE_ATTR_RO(max_link_width); + +static ssize_t current_link_speed_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pci_dev = to_pci_dev(dev); + u16 linkstat; + int err; + const char *speed; + + err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); + if (err) + return -EINVAL; + + switch (linkstat & PCI_EXP_LNKSTA_CLS) { + case PCI_EXP_LNKSTA_CLS_16_0GB: + speed = "16 GT/s"; + break; + case PCI_EXP_LNKSTA_CLS_8_0GB: + speed = "8 GT/s"; + break; + case PCI_EXP_LNKSTA_CLS_5_0GB: + speed = "5 GT/s"; + break; + case PCI_EXP_LNKSTA_CLS_2_5GB: + speed = "2.5 GT/s"; + break; + default: + speed = "Unknown speed"; + } + + return sprintf(buf, "%s\n", speed); +} +static DEVICE_ATTR_RO(current_link_speed); + +static ssize_t current_link_width_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pci_dev = to_pci_dev(dev); + u16 linkstat; + int err; + + err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); + if (err) + return -EINVAL; + + return sprintf(buf, "%u\n", + (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT); +} +static DEVICE_ATTR_RO(current_link_width); + +static ssize_t secondary_bus_number_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pci_dev = to_pci_dev(dev); + u8 sec_bus; + int err; + + err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus); + if (err) + return -EINVAL; + + return sprintf(buf, "%u\n", sec_bus); +} +static DEVICE_ATTR_RO(secondary_bus_number); + +static ssize_t subordinate_bus_number_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pci_dev = to_pci_dev(dev); + u8 sub_bus; + int err; + + err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus); + if (err) + return -EINVAL; + + return sprintf(buf, "%u\n", sub_bus); +} +static DEVICE_ATTR_RO(subordinate_bus_number); + +static ssize_t ari_enabled_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pci_dev = to_pci_dev(dev); + + return sprintf(buf, "%u\n", pci_ari_enabled(pci_dev->bus)); +} +static DEVICE_ATTR_RO(ari_enabled); + +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 DEVICE_ATTR_RO(modalias); + +static ssize_t enable_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 = kstrtoul(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; + + device_lock(dev); + if (dev->driver) + result = -EBUSY; + else if (val) + result = pci_enable_device(pdev); + else if (pci_is_enabled(pdev)) + pci_disable_device(pdev); + else + result = -EIO; + device_unlock(dev); + + return result < 0 ? result : count; +} + +static ssize_t enable_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)); +} +static DEVICE_ATTR_RW(enable); + +#ifdef CONFIG_NUMA +static ssize_t numa_node_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev); + int node, ret; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + ret = kstrtoint(buf, 0, &node); + if (ret) + return ret; + + if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES) + return -EINVAL; + + if (node != NUMA_NO_NODE && !node_online(node)) + return -EINVAL; + + add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); + pci_alert(pdev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", + node); + + dev->numa_node = node; + return count; +} + +static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%d\n", dev->numa_node); +} +static DEVICE_ATTR_RW(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 DEVICE_ATTR_RO(dma_mask_bits); + +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 DEVICE_ATTR_RO(consistent_dma_mask_bits); + +static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_bus *subordinate = pdev->subordinate; + + return sprintf(buf, "%u\n", subordinate ? + !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) + : !pdev->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); + struct pci_bus *subordinate = pdev->subordinate; + unsigned long val; + + if (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + /* + * "no_msi" and "bus_flags" only affect what happens when a driver + * requests MSI or MSI-X. They don't affect any drivers that have + * already requested MSI or MSI-X. + */ + if (!subordinate) { + pdev->no_msi = !val; + pci_info(pdev, "MSI/MSI-X %s for future drivers\n", + val ? "allowed" : "disallowed"); + return count; + } + + if (val) + subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; + else + subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; + + dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n", + val ? "allowed" : "disallowed"); + return count; +} +static DEVICE_ATTR_RW(msi_bus); + +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 (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + if (val) { + pci_lock_rescan_remove(); + while ((b = pci_find_next_bus(b)) != NULL) + pci_rescan_bus(b); + pci_unlock_rescan_remove(); + } + return count; +} +static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store); + +static struct attribute *pci_bus_attrs[] = { + &bus_attr_rescan.attr, + NULL, +}; + +static const struct attribute_group pci_bus_group = { + .attrs = pci_bus_attrs, +}; + +const struct attribute_group *pci_bus_groups[] = { + &pci_bus_group, + 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 (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + if (val) { + pci_lock_rescan_remove(); + pci_rescan_bus(pdev->bus); + pci_unlock_rescan_remove(); + } + return count; +} +static struct device_attribute dev_rescan_attr = __ATTR(rescan, + (S_IWUSR|S_IWGRP), + NULL, dev_rescan_store); + +static ssize_t remove_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + unsigned long val; + + if (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + if (val && device_remove_file_self(dev, attr)) + pci_stop_and_remove_bus_device_locked(to_pci_dev(dev)); + return count; +} +static struct device_attribute dev_remove_attr = __ATTR_IGNORE_LOCKDEP(remove, + (S_IWUSR|S_IWGRP), + NULL, remove_store); + +static ssize_t dev_bus_rescan_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + unsigned long val; + struct pci_bus *bus = to_pci_bus(dev); + + if (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + if (val) { + pci_lock_rescan_remove(); + if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) + pci_rescan_bus_bridge_resize(bus->self); + else + pci_rescan_bus(bus); + pci_unlock_rescan_remove(); + } + return count; +} +static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store); + +#if defined(CONFIG_PM) && defined(CONFIG_ACPI) +static ssize_t d3cold_allowed_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 (kstrtoul(buf, 0, &val) < 0) + return -EINVAL; + + pdev->d3cold_allowed = !!val; + if (pdev->d3cold_allowed) + pci_d3cold_enable(pdev); + else + pci_d3cold_disable(pdev); + + pm_runtime_resume(dev); + + return count; +} + +static ssize_t d3cold_allowed_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + return sprintf(buf, "%u\n", pdev->d3cold_allowed); +} +static DEVICE_ATTR_RW(d3cold_allowed); +#endif + +#ifdef CONFIG_OF +static ssize_t devspec_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct device_node *np = pci_device_to_OF_node(pdev); + + if (np == NULL) + return 0; + return sprintf(buf, "%pOF", np); +} +static DEVICE_ATTR_RO(devspec); +#endif + +#ifdef CONFIG_PCI_IOV +static ssize_t sriov_totalvfs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev)); +} + + +static ssize_t sriov_numvfs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%u\n", pdev->sriov->num_VFs); +} + +/* + * num_vfs > 0; number of VFs to enable + * num_vfs = 0; disable all VFs + * + * Note: SRIOV spec doesn't allow partial VF + * disable, so it's all or none. + */ +static ssize_t sriov_numvfs_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev); + int ret; + u16 num_vfs; + + ret = kstrtou16(buf, 0, &num_vfs); + if (ret < 0) + return ret; + + if (num_vfs > pci_sriov_get_totalvfs(pdev)) + return -ERANGE; + + device_lock(&pdev->dev); + + if (num_vfs == pdev->sriov->num_VFs) + goto exit; + + /* is PF driver loaded w/callback */ + if (!pdev->driver || !pdev->driver->sriov_configure) { + pci_info(pdev, "Driver doesn't support SRIOV configuration via sysfs\n"); + ret = -ENOENT; + goto exit; + } + + if (num_vfs == 0) { + /* disable VFs */ + ret = pdev->driver->sriov_configure(pdev, 0); + goto exit; + } + + /* enable VFs */ + if (pdev->sriov->num_VFs) { + pci_warn(pdev, "%d VFs already enabled. Disable before enabling %d VFs\n", + pdev->sriov->num_VFs, num_vfs); + ret = -EBUSY; + goto exit; + } + + ret = pdev->driver->sriov_configure(pdev, num_vfs); + if (ret < 0) + goto exit; + + if (ret != num_vfs) + pci_warn(pdev, "%d VFs requested; only %d enabled\n", + num_vfs, ret); + +exit: + device_unlock(&pdev->dev); + + if (ret < 0) + return ret; + + return count; +} + +static ssize_t sriov_offset_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%u\n", pdev->sriov->offset); +} + +static ssize_t sriov_stride_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%u\n", pdev->sriov->stride); +} + +static ssize_t sriov_vf_device_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%x\n", pdev->sriov->vf_device); +} + +static ssize_t sriov_drivers_autoprobe_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe); +} + +static ssize_t sriov_drivers_autoprobe_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev); + bool drivers_autoprobe; + + if (kstrtobool(buf, &drivers_autoprobe) < 0) + return -EINVAL; + + pdev->sriov->drivers_autoprobe = drivers_autoprobe; + + return count; +} + +static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs); +static struct device_attribute sriov_numvfs_attr = + __ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP), + sriov_numvfs_show, sriov_numvfs_store); +static struct device_attribute sriov_offset_attr = __ATTR_RO(sriov_offset); +static struct device_attribute sriov_stride_attr = __ATTR_RO(sriov_stride); +static struct device_attribute sriov_vf_device_attr = __ATTR_RO(sriov_vf_device); +static struct device_attribute sriov_drivers_autoprobe_attr = + __ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP), + sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store); +#endif /* CONFIG_PCI_IOV */ + +static ssize_t driver_override_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev); + char *driver_override, *old, *cp; + + /* We need to keep extra room for a newline */ + if (count >= (PAGE_SIZE - 1)) + return -EINVAL; + + driver_override = kstrndup(buf, count, GFP_KERNEL); + if (!driver_override) + return -ENOMEM; + + cp = strchr(driver_override, '\n'); + if (cp) + *cp = '\0'; + + device_lock(dev); + old = pdev->driver_override; + if (strlen(driver_override)) { + pdev->driver_override = driver_override; + } else { + kfree(driver_override); + pdev->driver_override = NULL; + } + device_unlock(dev); + + kfree(old); + + return count; +} + +static ssize_t driver_override_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + ssize_t len; + + device_lock(dev); + len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override); + device_unlock(dev); + return len; +} +static DEVICE_ATTR_RW(driver_override); + +static struct attribute *pci_dev_attrs[] = { + &dev_attr_resource.attr, + &dev_attr_vendor.attr, + &dev_attr_device.attr, + &dev_attr_subsystem_vendor.attr, + &dev_attr_subsystem_device.attr, + &dev_attr_revision.attr, + &dev_attr_class.attr, + &dev_attr_irq.attr, + &dev_attr_local_cpus.attr, + &dev_attr_local_cpulist.attr, + &dev_attr_modalias.attr, +#ifdef CONFIG_NUMA + &dev_attr_numa_node.attr, +#endif + &dev_attr_dma_mask_bits.attr, + &dev_attr_consistent_dma_mask_bits.attr, + &dev_attr_enable.attr, + &dev_attr_broken_parity_status.attr, + &dev_attr_msi_bus.attr, +#if defined(CONFIG_PM) && defined(CONFIG_ACPI) + &dev_attr_d3cold_allowed.attr, +#endif +#ifdef CONFIG_OF + &dev_attr_devspec.attr, +#endif + &dev_attr_driver_override.attr, + &dev_attr_ari_enabled.attr, + NULL, +}; + +static struct attribute *pci_bridge_attrs[] = { + &dev_attr_subordinate_bus_number.attr, + &dev_attr_secondary_bus_number.attr, + NULL, +}; + +static struct attribute *pcie_dev_attrs[] = { + &dev_attr_current_link_speed.attr, + &dev_attr_current_link_width.attr, + &dev_attr_max_link_width.attr, + &dev_attr_max_link_speed.attr, + NULL, +}; + +static struct attribute *pcibus_attrs[] = { + &dev_attr_rescan.attr, + &dev_attr_cpuaffinity.attr, + &dev_attr_cpulistaffinity.attr, + NULL, +}; + +static const struct attribute_group pcibus_group = { + .attrs = pcibus_attrs, +}; + +const struct attribute_group *pcibus_groups[] = { + &pcibus_group, + NULL, +}; + +static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *vga_dev = vga_default_device(); + + if (vga_dev) + return sprintf(buf, "%u\n", (pdev == vga_dev)); + + return sprintf(buf, "%u\n", + !!(pdev->resource[PCI_ROM_RESOURCE].flags & + IORESOURCE_ROM_SHADOW)); +} +static struct device_attribute vga_attr = __ATTR_RO(boot_vga); + +static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct pci_dev *dev = to_pci_dev(kobj_to_dev(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 (file_ns_capable(filp, &init_user_ns, 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; + } + + pci_config_pm_runtime_get(dev); + + 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; + } + + pci_config_pm_runtime_put(dev); + + return count; +} + +static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct pci_dev *dev = to_pci_dev(kobj_to_dev(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; + } + + pci_config_pm_runtime_get(dev); + + 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; + } + + pci_config_pm_runtime_put(dev); + + return count; +} + +#ifdef HAVE_PCI_LEGACY +/** + * pci_read_legacy_io - read byte(s) from legacy I/O port space + * @filp: open sysfs file + * @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). + */ +static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct pci_bus *bus = to_pci_bus(kobj_to_dev(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 + * @filp: open sysfs file + * @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). + */ +static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct pci_bus *bus = to_pci_bus(kobj_to_dev(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 + * @filp: open sysfs file + * @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_mem_page_range, to mmap + * legacy memory space (first meg of bus space) into application virtual + * memory space. + */ +static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + struct vm_area_struct *vma) +{ + struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); + + return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); +} + +/** + * pci_mmap_legacy_io - map legacy PCI IO into user memory space + * @filp: open sysfs file + * @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 file *filp, struct kobject *kobj, + struct bin_attribute *attr, + struct vm_area_struct *vma) +{ + struct pci_bus *bus = to_pci_bus(kobj_to_dev(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) +{ +} + +/** + * 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 propagate 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 = kcalloc(2, sizeof(struct bin_attribute), + 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 */ + +#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) + +int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, + enum pci_mmap_api mmap_api) +{ + unsigned long nr, start, size; + resource_size_t pci_start = 0, pci_end; + + if (pci_resource_len(pdev, resno) == 0) + return 0; + nr = vma_pages(vma); + start = vma->vm_pgoff; + size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; + if (mmap_api == PCI_MMAP_PROCFS) { + pci_resource_to_user(pdev, resno, &pdev->resource[resno], + &pci_start, &pci_end); + pci_start >>= PAGE_SHIFT; + } + if (start >= pci_start && start < pci_start + size && + start + nr <= pci_start + size) + return 1; + 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. + */ +static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, + struct vm_area_struct *vma, int write_combine) +{ + struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); + int bar = (unsigned long)attr->private; + enum pci_mmap_state mmap_type; + struct resource *res = &pdev->resource[bar]; + + if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start)) + return -EINVAL; + + if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) + return -EINVAL; + + mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; + + return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine); +} + +static int pci_mmap_resource_uc(struct file *filp, 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 file *filp, struct kobject *kobj, + struct bin_attribute *attr, + struct vm_area_struct *vma) +{ + return pci_mmap_resource(kobj, attr, vma, 1); +} + +static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count, bool write) +{ + struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); + int bar = (unsigned long)attr->private; + unsigned long port = off; + + port += pci_resource_start(pdev, bar); + + if (port > pci_resource_end(pdev, bar)) + return 0; + + if (port + count - 1 > pci_resource_end(pdev, bar)) + return -EINVAL; + + switch (count) { + case 1: + if (write) + outb(*(u8 *)buf, port); + else + *(u8 *)buf = inb(port); + return 1; + case 2: + if (write) + outw(*(u16 *)buf, port); + else + *(u16 *)buf = inw(port); + return 2; + case 4: + if (write) + outl(*(u32 *)buf, port); + else + *(u32 *)buf = inl(port); + return 4; + } + return -EINVAL; +} + +static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + return pci_resource_io(filp, kobj, attr, buf, off, count, false); +} + +static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + return pci_resource_io(filp, kobj, attr, buf, off, count, true); +} + +/** + * pci_remove_resource_files - cleanup resource files + * @pdev: dev to cleanup + * + * If we created resource files for @pdev, 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); + } + + res_attr = pdev->res_attr_wc[i]; + if (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; + char *res_attr_name; + int retval; + + res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); + if (!res_attr) + return -ENOMEM; + + 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); + if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { + res_attr->read = pci_read_resource_io; + res_attr->write = pci_write_resource_io; + if (arch_can_pci_mmap_io()) + res_attr->mmap = pci_mmap_resource_uc; + } else { + 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 = (void *)(unsigned long)num; + retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); + if (retval) + kfree(res_attr); + + return retval; +} + +/** + * pci_create_resource_files - create resource files in sysfs for @dev + * @pdev: dev in question + * + * Walk the resources in @pdev 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++) { + + /* 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 && arch_can_pci_mmap_wc() && + 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 */ +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 + * @filp: sysfs file + * @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 file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(kobj_to_dev(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 + * @filp: sysfs file + * @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 + * + * 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 file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(kobj_to_dev(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 || !size) + return -EIO; + + 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 const struct bin_attribute pci_config_attr = { + .attr = { + .name = "config", + .mode = S_IRUGO | S_IWUSR, + }, + .size = PCI_CFG_SPACE_SIZE, + .read = pci_read_config, + .write = pci_write_config, +}; + +static const struct bin_attribute pcie_config_attr = { + .attr = { + .name = "config", + .mode = S_IRUGO | S_IWUSR, + }, + .size = PCI_CFG_SPACE_EXP_SIZE, + .read = pci_read_config, + .write = pci_write_config, +}; + +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 = kstrtoul(buf, 0, &val); + + if (result < 0) + return result; + + if (val != 1) + return -EINVAL; + + pm_runtime_get_sync(dev); + result = pci_reset_function(pdev); + pm_runtime_put(dev); + if (result < 0) + return result; + + return count; +} + +static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store); + +static int pci_create_capabilities_sysfs(struct pci_dev *dev) +{ + int retval; + + pcie_vpd_create_sysfs_dev_files(dev); + pcie_aspm_create_sysfs_dev_files(dev); + + if (dev->reset_fn) { + retval = device_create_file(&dev->dev, &reset_attr); + if (retval) + goto error; + } + return 0; + +error: + pcie_aspm_remove_sysfs_dev_files(dev); + pcie_vpd_remove_sysfs_dev_files(dev); + return retval; +} + +int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) +{ + int retval; + int rom_size; + struct bin_attribute *attr; + + if (!sysfs_initialized) + return -EACCES; + + if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) + retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); + else + retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); + if (retval) + goto err; + + retval = pci_create_resource_files(pdev); + if (retval) + goto err_config_file; + + /* If the device has a ROM, try to expose it in sysfs. */ + rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); + 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 | S_IWUSR; + 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; + } + + /* add sysfs entries for various capabilities */ + retval = pci_create_capabilities_sysfs(pdev); + if (retval) + goto err_rom_file; + + pci_create_firmware_label_files(pdev); + + return 0; + +err_rom_file: + if (pdev->rom_attr) { + 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_SIZE) + sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); + else + sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); +err: + return retval; +} + +static void pci_remove_capabilities_sysfs(struct pci_dev *dev) +{ + pcie_vpd_remove_sysfs_dev_files(dev); + pcie_aspm_remove_sysfs_dev_files(dev); + if (dev->reset_fn) { + device_remove_file(&dev->dev, &reset_attr); + dev->reset_fn = 0; + } +} + +/** + * 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; + + pci_remove_capabilities_sysfs(pdev); + + if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) + sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); + else + sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); + + pci_remove_resource_files(pdev); + + if (pdev->rom_attr) { + sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); + kfree(pdev->rom_attr); + pdev->rom_attr = NULL; + } + + pci_remove_firmware_label_files(pdev); +} + +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); + +static struct attribute *pci_dev_dev_attrs[] = { + &vga_attr.attr, + NULL, +}; + +static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (a == &vga_attr.attr) + if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) + return 0; + + return a->mode; +} + +static struct attribute *pci_dev_hp_attrs[] = { + &dev_remove_attr.attr, + &dev_rescan_attr.attr, + NULL, +}; + +static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (pdev->is_virtfn) + return 0; + + return a->mode; +} + +static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (pci_is_bridge(pdev)) + return a->mode; + + return 0; +} + +static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (pci_is_pcie(pdev)) + return a->mode; + + return 0; +} + +static const struct attribute_group pci_dev_group = { + .attrs = pci_dev_attrs, +}; + +const struct attribute_group *pci_dev_groups[] = { + &pci_dev_group, + NULL, +}; + +static const struct attribute_group pci_bridge_group = { + .attrs = pci_bridge_attrs, +}; + +const struct attribute_group *pci_bridge_groups[] = { + &pci_bridge_group, + NULL, +}; + +static const struct attribute_group pcie_dev_group = { + .attrs = pcie_dev_attrs, +}; + +const struct attribute_group *pcie_dev_groups[] = { + &pcie_dev_group, + NULL, +}; + +static const struct attribute_group pci_dev_hp_attr_group = { + .attrs = pci_dev_hp_attrs, + .is_visible = pci_dev_hp_attrs_are_visible, +}; + +#ifdef CONFIG_PCI_IOV +static struct attribute *sriov_dev_attrs[] = { + &sriov_totalvfs_attr.attr, + &sriov_numvfs_attr.attr, + &sriov_offset_attr.attr, + &sriov_stride_attr.attr, + &sriov_vf_device_attr.attr, + &sriov_drivers_autoprobe_attr.attr, + NULL, +}; + +static umode_t sriov_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = kobj_to_dev(kobj); + + if (!dev_is_pf(dev)) + return 0; + + return a->mode; +} + +static const struct attribute_group sriov_dev_attr_group = { + .attrs = sriov_dev_attrs, + .is_visible = sriov_attrs_are_visible, +}; +#endif /* CONFIG_PCI_IOV */ + +static const struct attribute_group pci_dev_attr_group = { + .attrs = pci_dev_dev_attrs, + .is_visible = pci_dev_attrs_are_visible, +}; + +static const struct attribute_group pci_bridge_attr_group = { + .attrs = pci_bridge_attrs, + .is_visible = pci_bridge_attrs_are_visible, +}; + +static const struct attribute_group pcie_dev_attr_group = { + .attrs = pcie_dev_attrs, + .is_visible = pcie_dev_attrs_are_visible, +}; + +static const struct attribute_group *pci_dev_attr_groups[] = { + &pci_dev_attr_group, + &pci_dev_hp_attr_group, +#ifdef CONFIG_PCI_IOV + &sriov_dev_attr_group, +#endif + &pci_bridge_attr_group, + &pcie_dev_attr_group, +#ifdef CONFIG_PCIEAER + &aer_stats_attr_group, +#endif + NULL, +}; + +const struct device_type pci_dev_type = { + .groups = pci_dev_attr_groups, +}; |