diff options
Diffstat (limited to 'drivers/pci/pci-sysfs.c')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 837 |
1 files changed, 578 insertions, 259 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index b5a7d9bfcb2..9ff0a901ecf 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -10,7 +10,7 @@ * * File attributes for PCI devices * - * Modeled after usb's driverfs.c + * Modeled after usb's driverfs.c * */ @@ -19,12 +19,17 @@ #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/pci-aspm.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 */ @@ -36,9 +41,10 @@ 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); \ -} + 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"); @@ -52,7 +58,7 @@ static ssize_t broken_parity_status_show(struct device *dev, char *buf) { struct pci_dev *pdev = to_pci_dev(dev); - return sprintf (buf, "%u\n", pdev->broken_parity_status); + return sprintf(buf, "%u\n", pdev->broken_parity_status); } static ssize_t broken_parity_status_store(struct device *dev, @@ -62,17 +68,18 @@ static ssize_t broken_parity_status_store(struct device *dev, struct pci_dev *pdev = to_pci_dev(dev); unsigned long val; - if (strict_strtoul(buf, 0, &val) < 0) + 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 local_cpus_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ +static ssize_t pci_dev_show_local_cpu(struct device *dev, int type, + struct device_attribute *attr, char *buf) +{ const struct cpumask *mask; int len; @@ -82,37 +89,68 @@ static ssize_t local_cpus_show(struct device *dev, #else mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); #endif - len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); + len = type ? + cpumask_scnprintf(buf, PAGE_SIZE-2, mask) : + cpulist_scnprintf(buf, PAGE_SIZE-2, mask); + buf[len++] = '\n'; buf[len] = '\0'; return len; } +static ssize_t local_cpus_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return pci_dev_show_local_cpu(dev, 1, attr, buf); +} +static DEVICE_ATTR_RO(local_cpus); static ssize_t local_cpulist_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { - const struct cpumask *mask; - int len; + return pci_dev_show_local_cpu(dev, 0, attr, buf); +} +static DEVICE_ATTR_RO(local_cpulist); -#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; +/* + * PCI Bus Class Devices + */ +static ssize_t pci_bus_show_cpuaffinity(struct device *dev, int type, + struct device_attribute *attr, + char *buf) +{ + int ret; + const struct cpumask *cpumask; + + cpumask = cpumask_of_pcibus(to_pci_bus(dev)); + ret = type ? + cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) : + cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask); + buf[ret++] = '\n'; + buf[ret] = '\0'; + return ret; +} + +static ssize_t cpuaffinity_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return pci_bus_show_cpuaffinity(dev, 0, attr, buf); } +static DEVICE_ATTR_RO(cpuaffinity); + +static ssize_t cpulistaffinity_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return pci_bus_show_cpuaffinity(dev, 1, attr, buf); +} +static DEVICE_ATTR_RO(cpulistaffinity); /* show resources */ -static ssize_t -resource_show(struct device * dev, struct device_attribute *attr, char * buf) +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; + struct pci_dev *pci_dev = to_pci_dev(dev); + char *str = buf; int i; int max; resource_size_t start, end; @@ -125,15 +163,17 @@ resource_show(struct device * dev, struct device_attribute *attr, char * buf) 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", + 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 modalias_show(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct pci_dev *pci_dev = to_pci_dev(dev); @@ -143,14 +183,14 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), (u8)(pci_dev->class)); } +static DEVICE_ATTR_RO(modalias); -static ssize_t is_enabled_store(struct device *dev, - struct device_attribute *attr, const char *buf, - size_t count) +static ssize_t 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); + ssize_t result = kstrtoul(buf, 0, &val); if (result < 0) return result; @@ -170,67 +210,74 @@ static ssize_t is_enabled_store(struct device *dev, return result < 0 ? result : count; } -static ssize_t is_enabled_show(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t 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)); + pdev = to_pci_dev(dev); + return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); } +static DEVICE_ATTR_RW(enabled); #ifdef CONFIG_NUMA -static ssize_t -numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, + char *buf) { - return sprintf (buf, "%d\n", dev->numa_node); + return sprintf(buf, "%d\n", dev->numa_node); } +static DEVICE_ATTR_RO(numa_node); #endif -static ssize_t -dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) +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)); + 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) +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)); + 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) +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)); + 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) +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) + if (kstrtoul(buf, 0, &val) < 0) return -EINVAL; - /* bad things may happen if the no_msi flag is changed - * while some drivers are loaded */ + /* + * Bad things may happen if the no_msi flag is changed + * while 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? */ + /* + * Maybe devices without subordinate buses shouldn't have this + * attribute in the first place? + */ if (!pdev->subordinate) return count; @@ -239,140 +286,352 @@ msi_bus_store(struct device *dev, struct device_attribute *attr, !!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"); + dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI, bad things could happen\n", + val ? "" : " not"); } return count; } +static DEVICE_ATTR_RW(msi_bus); -#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) + if (kstrtoul(buf, 0, &val) < 0) return -EINVAL; if (val) { - mutex_lock(&pci_remove_rescan_mutex); + pci_lock_rescan_remove(); while ((b = pci_find_next_bus(b)) != NULL) pci_rescan_bus(b); - mutex_unlock(&pci_remove_rescan_mutex); + 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, +}; -struct bus_attribute pci_bus_attrs[] = { - __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), - __ATTR_NULL +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) +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) + if (kstrtoul(buf, 0, &val) < 0) return -EINVAL; if (val) { - mutex_lock(&pci_remove_rescan_mutex); + pci_lock_rescan_remove(); pci_rescan_bus(pdev->bus); - mutex_unlock(&pci_remove_rescan_mutex); + pci_unlock_rescan_remove(); } return count; } +static struct device_attribute dev_rescan_attr = __ATTR(rescan, + (S_IWUSR|S_IWGRP), + NULL, dev_rescan_store); -static void remove_callback(struct device *dev) +static ssize_t remove_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; - mutex_lock(&pci_remove_rescan_mutex); - pci_remove_bus_device(pdev); - mutex_unlock(&pci_remove_rescan_mutex); + 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(remove, + (S_IWUSR|S_IWGRP), + NULL, remove_store); -static ssize_t -remove_store(struct device *dev, struct device_attribute *dummy, - const char *buf, size_t count) +static ssize_t dev_bus_rescan_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) { - int ret = 0; unsigned long val; + struct pci_bus *bus = to_pci_bus(dev); - if (strict_strtoul(buf, 0, &val) < 0) + if (kstrtoul(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; + 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_RUNTIME) && 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; + 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 -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(local_cpulist), - __ATTR_RO(modalias), +#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 || np->full_name == NULL) + return 0; + return sprintf(buf, "%s", np->full_name); +} +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; + + if (num_vfs == pdev->sriov->num_VFs) + return count; /* no change */ + + /* is PF driver loaded w/callback */ + if (!pdev->driver || !pdev->driver->sriov_configure) { + dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n"); + return -ENOSYS; + } + + if (num_vfs == 0) { + /* disable VFs */ + ret = pdev->driver->sriov_configure(pdev, 0); + if (ret < 0) + return ret; + return count; + } + + /* enable VFs */ + if (pdev->sriov->num_VFs) { + dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n", + pdev->sriov->num_VFs, num_vfs); + return -EBUSY; + } + + ret = pdev->driver->sriov_configure(pdev, num_vfs); + if (ret < 0) + return ret; + + if (ret != num_vfs) + dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n", + num_vfs, ret); + + 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); +#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 = pdev->driver_override, *cp; + + if (count > PATH_MAX) + return -EINVAL; + + driver_override = kstrndup(buf, count, GFP_KERNEL); + if (!driver_override) + return -ENOMEM; + + cp = strchr(driver_override, '\n'); + if (cp) + *cp = '\0'; + + if (strlen(driver_override)) { + pdev->driver_override = driver_override; + } else { + kfree(driver_override); + pdev->driver_override = NULL; + } + + 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); + + return sprintf(buf, "%s\n", pdev->driver_override); +} +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_class.attr, + &dev_attr_irq.attr, + &dev_attr_local_cpus.attr, + &dev_attr_local_cpulist.attr, + &dev_attr_modalias.attr, #ifdef CONFIG_NUMA - __ATTR_RO(numa_node), + &dev_attr_numa_node.attr, #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), + &dev_attr_dma_mask_bits.attr, + &dev_attr_consistent_dma_mask_bits.attr, + &dev_attr_enabled.attr, + &dev_attr_broken_parity_status.attr, + &dev_attr_msi_bus.attr, +#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) + &dev_attr_d3cold_allowed.attr, #endif - __ATTR_NULL, +#ifdef CONFIG_OF + &dev_attr_devspec.attr, +#endif + &dev_attr_driver_override.attr, + NULL, +}; + +static const struct attribute_group pci_dev_group = { + .attrs = pci_dev_attrs, +}; + +const struct attribute_group *pci_dev_groups[] = { + &pci_dev_group, + 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, }; -static ssize_t -boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) +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)); } -struct device_attribute vga_attr = __ATTR_RO(boot_vga); +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) +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(container_of(kobj,struct device,kobj)); + 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; + u8 *data = (u8 *) buf; /* Several chips lock up trying to read undefined config space */ - if (cap_raised(filp->f_cred->cap_effective, CAP_SYS_ADMIN)) { + if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) size = dev->cfg_size; - } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { + else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) size = 128; - } if (off > size) return 0; @@ -383,6 +642,8 @@ pci_read_config(struct file *filp, struct kobject *kobj, size = count; } + pci_config_pm_runtime_get(dev); + if ((off & 1) && size) { u8 val; pci_user_read_config_byte(dev, off, &val); @@ -428,18 +689,20 @@ pci_read_config(struct file *filp, struct kobject *kobj, --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) +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(container_of(kobj,struct device,kobj)); + 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; + u8 *data = (u8 *) buf; if (off > dev->cfg_size) return 0; @@ -447,20 +710,22 @@ pci_write_config(struct file* filp, struct kobject *kobj, 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; - } + pci_user_write_config_word(dev, off, val); + off += 2; + size -= 2; + } while (size > 3) { u32 val = data[off - init_off]; @@ -471,7 +736,7 @@ pci_write_config(struct file* filp, struct kobject *kobj, off += 4; size -= 4; } - + if (size >= 2) { u16 val = data[off - init_off]; val |= (u16) data[off - init_off + 1] << 8; @@ -486,13 +751,14 @@ pci_write_config(struct file* filp, struct kobject *kobj, --size; } + pci_config_pm_runtime_put(dev); + return count; } -static ssize_t -read_vpd_attr(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t count) +static ssize_t read_vpd_attr(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(container_of(kobj, struct device, kobj)); @@ -505,10 +771,9 @@ read_vpd_attr(struct file *filp, struct kobject *kobj, return pci_read_vpd(dev, off, count, buf); } -static ssize_t -write_vpd_attr(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t count) +static ssize_t write_vpd_attr(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(container_of(kobj, struct device, kobj)); @@ -534,20 +799,18 @@ write_vpd_attr(struct file *filp, struct kobject *kobj, * 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) +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(container_of(kobj, - struct device, + struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device, kobj)); - /* Only support 1, 2 or 4 byte accesses */ - if (count != 1 && count != 2 && count != 4) - return -EINVAL; + /* 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); + return pci_legacy_read(bus, off, (u32 *)buf, count); } /** @@ -562,19 +825,18 @@ pci_read_legacy_io(struct file *filp, struct kobject *kobj, * 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) +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(container_of(kobj, - struct device, + struct pci_bus *bus = to_pci_bus(container_of(kobj, struct 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); + /* 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); } /** @@ -588,16 +850,14 @@ pci_write_legacy_io(struct file *filp, struct kobject *kobj, * 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) +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(container_of(kobj, - struct device, + struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device, kobj)); - return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); + return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); } /** @@ -611,16 +871,14 @@ pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, * 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) +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(container_of(kobj, - struct device, + struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device, kobj)); - return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); + return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); } /** @@ -630,10 +888,9 @@ pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, * * 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) +void __weak pci_adjust_legacy_attr(struct pci_bus *b, + enum pci_mmap_state mmap_type) { - return; } /** @@ -644,7 +901,7 @@ pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type) * 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 + * 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) @@ -688,8 +945,7 @@ 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"); + printk(KERN_WARNING "pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n"); return; } @@ -705,17 +961,21 @@ void pci_remove_legacy_files(struct pci_bus *b) #ifdef HAVE_PCI_MMAP -int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma) +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; + unsigned long nr, start, size, pci_start; - nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; + 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 (start < size && size - start >= nr) + pci_start = (mmap_api == PCI_MMAP_PROCFS) ? + pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0; + if (start >= pci_start && start < pci_start + size && + start + nr <= pci_start + size) 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; } @@ -728,9 +988,8 @@ int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma) * * 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) +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(container_of(kobj, struct device, kobj)); @@ -745,8 +1004,14 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, if (i >= PCI_ROM_RESOURCE) return -ENODEV; - if (!pci_mmap_fits(pdev, i, vma)) + if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) { + WARN(1, "process \"%s\" tried to map 0x%08lx bytes at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n", + current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, + pci_name(pdev), i, + (u64)pci_resource_start(pdev, i), + (u64)pci_resource_len(pdev, i)); 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 @@ -762,26 +1027,23 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, return pci_mmap_page_range(pdev, 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) +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) +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) +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(container_of(kobj, struct device, kobj)); @@ -826,18 +1088,16 @@ pci_resource_io(struct file *filp, struct kobject *kobj, 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) +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) +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); } @@ -849,8 +1109,7 @@ pci_write_resource_io(struct file *filp, struct kobject *kobj, * 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) +static void pci_remove_resource_files(struct pci_dev *pdev) { int i; @@ -953,10 +1212,9 @@ void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } * * 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) +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(container_of(kobj, struct device, kobj)); @@ -980,10 +1238,9 @@ pci_write_rom(struct file *filp, struct kobject *kobj, * 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) +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(container_of(kobj, struct device, kobj)); void __iomem *rom; @@ -991,21 +1248,21 @@ pci_read_rom(struct file *filp, struct kobject *kobj, 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; } @@ -1029,18 +1286,12 @@ static struct bin_attribute pcie_config_attr = { .write = pci_write_config, }; -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) +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); + ssize_t result = kstrtoul(buf, 0, &val); if (result < 0) return result; @@ -1076,7 +1327,7 @@ static int pci_create_capabilities_sysfs(struct pci_dev *dev) attr->write = write_vpd_attr; retval = sysfs_create_bin_file(&dev->dev.kobj, attr); if (retval) { - kfree(dev->vpd->attr); + kfree(attr); return retval; } dev->vpd->attr = attr; @@ -1103,7 +1354,7 @@ error: return retval; } -int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) +int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) { int retval; int rom_size = 0; @@ -1138,7 +1389,7 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) sysfs_bin_attr_init(attr); attr->size = rom_size; attr->attr.name = "rom"; - attr->attr.mode = S_IRUSR; + 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); @@ -1149,29 +1400,15 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) 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 */ - 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; + goto err_rom_file; pci_create_firmware_label_files(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); @@ -1255,5 +1492,87 @@ static int __init pci_sysfs_init(void) 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 = container_of(kobj, struct device, 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 = container_of(kobj, struct device, kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (pdev->is_virtfn) + return 0; + + return a->mode; +} + +static 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, + NULL, +}; + +static umode_t sriov_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + + if (!dev_is_pf(dev)) + return 0; + + return a->mode; +} + +static struct attribute_group sriov_dev_attr_group = { + .attrs = sriov_dev_attrs, + .is_visible = sriov_attrs_are_visible, +}; +#endif /* CONFIG_PCI_IOV */ + +static 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_dev_attr_groups[] = { + &pci_dev_attr_group, + &pci_dev_hp_attr_group, +#ifdef CONFIG_PCI_IOV + &sriov_dev_attr_group, +#endif + NULL, +}; + +struct device_type pci_dev_type = { + .groups = pci_dev_attr_groups, +}; |