diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 138 |
1 files changed, 83 insertions, 55 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 00a9947cb7c..2cad6da2e4a 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -735,10 +735,41 @@ int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) return 0; } +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; + + attr->size = dev->vpd->len; + attr->attr.name = "vpd"; + attr->attr.mode = S_IRUSR | S_IWUSR; + attr->read = pci_read_vpd; + attr->write = pci_write_vpd; + 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); + + return 0; +} + int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) { - struct bin_attribute *attr = NULL; int retval; + int rom_size = 0; + struct bin_attribute *attr; if (!sysfs_initialized) return -EACCES; @@ -750,69 +781,55 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) if (retval) goto err; - /* If the device has VPD, try to expose it in sysfs. */ - if (pdev->vpd) { - attr = kzalloc(sizeof(*attr), GFP_ATOMIC); - if (attr) { - pdev->vpd->attr = attr; - attr->size = pdev->vpd->len; - attr->attr.name = "vpd"; - attr->attr.mode = S_IRUSR | S_IWUSR; - attr->read = pci_read_vpd; - attr->write = pci_write_vpd; - retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); - if (retval) - goto err_vpd; - } else { - retval = -ENOMEM; - goto err_config_file; - } - } - retval = pci_create_resource_files(pdev); if (retval) - goto err_vpd_file; + goto err_config_file; + + 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) || - (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) { + if (rom_size) { attr = kzalloc(sizeof(*attr), GFP_ATOMIC); - if (attr) { - pdev->rom_attr = attr; - attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE); - 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) - goto err_rom; - } else { + if (!attr) { retval = -ENOMEM; goto err_resource_files; } + 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; } + /* add platform-specific attributes */ - if (pcibios_add_platform_entries(pdev)) + retval = pcibios_add_platform_entries(pdev); + if (retval) goto err_rom_file; - pcie_aspm_create_sysfs_dev_files(pdev); + /* add sysfs entries for various capabilities */ + retval = pci_create_capabilities_sysfs(pdev); + if (retval) + goto err_rom_file; return 0; err_rom_file: - if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) + if (rom_size) { sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); -err_rom: - kfree(pdev->rom_attr); + kfree(pdev->rom_attr); + pdev->rom_attr = NULL; + } err_resource_files: pci_remove_resource_files(pdev); -err_vpd_file: - if (pdev->vpd) { - sysfs_remove_bin_file(&pdev->dev.kobj, pdev->vpd->attr); -err_vpd: - kfree(pdev->vpd->attr); - } err_config_file: if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); @@ -822,6 +839,16 @@ 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); +} + /** * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files * @pdev: device whose entries we should free @@ -830,15 +857,13 @@ err: */ void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { + int rom_size = 0; + if (!sysfs_initialized) return; - pcie_aspm_remove_sysfs_dev_files(pdev); + pci_remove_capabilities_sysfs(pdev); - if (pdev->vpd) { - sysfs_remove_bin_file(&pdev->dev.kobj, pdev->vpd->attr); - kfree(pdev->vpd->attr); - } if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); else @@ -846,11 +871,14 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev) 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); } } |