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authorBrian King <brking@linux.vnet.ibm.com>2007-05-07 18:04:05 -0400
committerPaul Mackerras <paulus@samba.org>2007-05-07 23:40:31 -0400
commit00c2ae35bd50664bcd841becc6efceef8aa5d074 (patch)
tree16a952d96cf7619ad235b1990231a147c51a8840 /arch
parent02bbc0f09c90cefdb2837605c96a66c5ce4ba2e1 (diff)
[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 <linas@austin.ibm.com> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/pseries/eeh.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 48fbd442e9df..63e23062e982 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -580,6 +580,36 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state)
580} 580}
581 581
582/** 582/**
583 * pcibios_set_pcie_slot_reset - Set PCI-E reset state
584 * @dev: pci device struct
585 * @state: reset state to enter
586 *
587 * Return value:
588 * 0 if success
589 **/
590int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state)
591{
592 struct device_node *dn = pci_device_to_OF_node(dev);
593 struct pci_dn *pdn = PCI_DN(dn);
594
595 switch (state) {
596 case pcie_deassert_reset:
597 rtas_pci_slot_reset(pdn, 0);
598 break;
599 case pcie_hot_reset:
600 rtas_pci_slot_reset(pdn, 1);
601 break;
602 case pcie_warm_reset:
603 rtas_pci_slot_reset(pdn, 3);
604 break;
605 default:
606 return -EINVAL;
607 };
608
609 return 0;
610}
611
612/**
583 * rtas_set_slot_reset -- assert the pci #RST line for 1/4 second 613 * rtas_set_slot_reset -- assert the pci #RST line for 1/4 second
584 * @pdn: pci device node to be reset. 614 * @pdn: pci device node to be reset.
585 * 615 *