diff options
| -rw-r--r-- | drivers/pci/pci.c | 29 | ||||
| -rw-r--r-- | include/linux/pci.h | 14 |
2 files changed, 43 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 2a458279327..2086cd1b5e0 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -892,6 +892,34 @@ pci_disable_device(struct pci_dev *dev) } /** + * pcibios_set_pcie_reset_state - set reset state for device dev + * @dev: the PCI-E device reset + * @state: Reset state to enter into + * + * + * Sets the PCI-E reset state for the device. This is the default + * implementation. Architecture implementations can override this. + */ +int __attribute__ ((weak)) pcibios_set_pcie_reset_state(struct pci_dev *dev, + enum pcie_reset_state state) +{ + return -EINVAL; +} + +/** + * pci_set_pcie_reset_state - set reset state for device dev + * @dev: the PCI-E device reset + * @state: Reset state to enter into + * + * + * Sets the PCI reset state for the device. + */ +int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state) +{ + return pcibios_set_pcie_reset_state(dev, state); +} + +/** * pci_enable_wake - enable PCI device as wakeup event source * @dev: PCI device affected * @state: PCI state from which device will issue wakeup events @@ -1427,4 +1455,5 @@ EXPORT_SYMBOL(pci_set_power_state); EXPORT_SYMBOL(pci_save_state); EXPORT_SYMBOL(pci_restore_state); EXPORT_SYMBOL(pci_enable_wake); +EXPORT_SYMBOL_GPL(pci_set_pcie_reset_state); diff --git a/include/linux/pci.h b/include/linux/pci.h index 972491089ac..3aba02a0479 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -96,6 +96,19 @@ enum pci_channel_state { pci_channel_io_perm_failure = (__force pci_channel_state_t) 3, }; +typedef unsigned int __bitwise pcie_reset_state_t; + +enum pcie_reset_state { + /* Reset is NOT asserted (Use to deassert reset) */ + pcie_deassert_reset = (__force pcie_reset_state_t) 1, + + /* Use #PERST to reset PCI-E device */ + pcie_warm_reset = (__force pcie_reset_state_t) 2, + + /* Use PCI-E Hot Reset to reset device */ + pcie_hot_reset = (__force pcie_reset_state_t) 3 +}; + typedef unsigned short __bitwise pci_bus_flags_t; enum pci_bus_flags { PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1, @@ -532,6 +545,7 @@ static inline int pci_is_managed(struct pci_dev *pdev) void pci_disable_device(struct pci_dev *dev); void pci_set_master(struct pci_dev *dev); +int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); #define HAVE_PCI_SET_MWI int __must_check pci_set_mwi(struct pci_dev *dev); void pci_clear_mwi(struct pci_dev *dev); |