[PATCH 2/3] powerpc: Add powerpc PCI-E reset API implementation
From: Brian King <hidden>
Date: 2007-02-19 14:47:26
Also in:
linux-scsi
Adds the pSeries platform implementation for a new PCI 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). Signed-off-by: Brian King <redacted> --- linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c | 30 +++++++++++++++++ 1 files changed, 30 insertions(+) diff -puN arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api3 arch/powerpc/platforms/pseries/eeh.c
--- linux-2.6/arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api3 2007-02-01 10:29:21.000000000 -0600
+++ linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c 2007-02-01 10:30:59.000000000 -0600@@ -561,6 +561,36 @@ rtas_pci_slot_reset(struct pci_dn *pdn, } /** + * pcibios_set_pcie_slot_reset - Set PCI-E reset state + * @dev: pci device struct + * @state: reset state to enter + * + * Return value: + * 0 if success + **/ +int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state) +{ + struct device_node *dn = pci_device_to_OF_node(dev); + struct pci_dn *pdn = PCI_DN(dn); + + switch (state) { + case pci_reset_normal: + rtas_pci_slot_reset(pdn, 0); + break; + case pci_reset_pcie_hot_reset: + rtas_pci_slot_reset(pdn, 1); + break; + case pci_reset_pcie_warm_reset: + rtas_pci_slot_reset(pdn, 3); + break; + default: + return -EINVAL; + }; + + return 0; +} + +/** * rtas_set_slot_reset -- assert the pci #RST line for 1/4 second * @pdn: pci device node to be reset. *
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