diff options
Diffstat (limited to 'drivers/pci/access.c')
-rw-r--r-- | drivers/pci/access.c | 61 |
1 files changed, 59 insertions, 2 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index 8b7382705bf2..74cf5fffb1e1 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -629,7 +629,7 @@ void pci_vpd_release(struct pci_dev *dev) * * When access is locked, any userspace reads or writes to config * space and concurrent lock requests will sleep until access is - * allowed via pci_cfg_access_unlocked again. + * allowed via pci_cfg_access_unlock() again. */ void pci_cfg_access_lock(struct pci_dev *dev) { @@ -700,7 +700,8 @@ static bool pcie_downstream_port(const struct pci_dev *dev) int type = pci_pcie_type(dev); return type == PCI_EXP_TYPE_ROOT_PORT || - type == PCI_EXP_TYPE_DOWNSTREAM; + type == PCI_EXP_TYPE_DOWNSTREAM || + type == PCI_EXP_TYPE_PCIE_BRIDGE; } bool pcie_cap_has_lnkctl(const struct pci_dev *dev) @@ -890,3 +891,59 @@ int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos, return ret; } EXPORT_SYMBOL(pcie_capability_clear_and_set_dword); + +int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val) +{ + if (pci_dev_is_disconnected(dev)) { + *val = ~0; + return -ENODEV; + } + return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val); +} +EXPORT_SYMBOL(pci_read_config_byte); + +int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val) +{ + if (pci_dev_is_disconnected(dev)) { + *val = ~0; + return -ENODEV; + } + return pci_bus_read_config_word(dev->bus, dev->devfn, where, val); +} +EXPORT_SYMBOL(pci_read_config_word); + +int pci_read_config_dword(const struct pci_dev *dev, int where, + u32 *val) +{ + if (pci_dev_is_disconnected(dev)) { + *val = ~0; + return -ENODEV; + } + return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val); +} +EXPORT_SYMBOL(pci_read_config_dword); + +int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val) +{ + if (pci_dev_is_disconnected(dev)) + return -ENODEV; + return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val); +} +EXPORT_SYMBOL(pci_write_config_byte); + +int pci_write_config_word(const struct pci_dev *dev, int where, u16 val) +{ + if (pci_dev_is_disconnected(dev)) + return -ENODEV; + return pci_bus_write_config_word(dev->bus, dev->devfn, where, val); +} +EXPORT_SYMBOL(pci_write_config_word); + +int pci_write_config_dword(const struct pci_dev *dev, int where, + u32 val) +{ + if (pci_dev_is_disconnected(dev)) + return -ENODEV; + return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val); +} +EXPORT_SYMBOL(pci_write_config_dword); |