From: Brian King Date: Mon, 7 May 2007 22:04:05 +0000 (+1000) Subject: [POWERPC] Add powerpc PCI-E reset API implementation X-Git-Tag: v2.6.22-rc1~358^2~13 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=00c2ae35bd50664bcd841becc6efceef8aa5d074;p=linux-2.6 [POWERPC] Add powerpc PCI-E reset API implementation 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). Acked-by: Linas Vepstas Signed-off-by: Brian King Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 48fbd442e9..63e23062e9 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -579,6 +579,36 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state) rc, state, pdn->node->full_name); } +/** + * 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 pcie_deassert_reset: + rtas_pci_slot_reset(pdn, 0); + break; + case pcie_hot_reset: + rtas_pci_slot_reset(pdn, 1); + break; + case 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.