From f7bdd12d234d9064bd0aa1b5610508959120a9b4 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 6 Apr 2007 16:39:36 -0500 Subject: pci: New PCI-E reset API Adds a new API which can be used to issue various types of PCI-E reset, including PCI-E warm reset and PCI-E hot reset. This is needed for an ipr PCI-E adapter which does not properly implement BIST. Running BIST on this adapter results in PCI-E errors. The only reliable reset mechanism that exists on this hardware is PCI Fundamental reset (warm reset). Since driving this type of reset is architecture unique, this provides the necessary hooks for architectures to add this support. Signed-off-by: Brian King Acked-by: Linas Vepstas Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pci.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'drivers/pci') diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 2a458279327a..2086cd1b5e0e 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -891,6 +891,34 @@ pci_disable_device(struct pci_dev *dev) pcibios_disable_device(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 @@ -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); -- cgit v1.2.2