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authorKumar Gala <galak@kernel.crashing.org>2007-07-11 13:22:41 -0500
committerKumar Gala <galak@kernel.crashing.org>2007-07-23 10:27:07 -0500
commit62c66c8e55fae40d93d8f79d60e2ed50379e46f9 (patch)
tree036850e5b65d37be7586ab0ac17f8f54dc5af567 /arch
parent38805e5f096162867a70c7468c654d7f9bb507da (diff)
downloadop-kernel-dev-62c66c8e55fae40d93d8f79d60e2ed50379e46f9.zip
op-kernel-dev-62c66c8e55fae40d93d8f79d60e2ed50379e46f9.tar.gz
[POWERPC] Added indirect quirk to handle PCIe PHB that have issue w/no link
Added PPC_INDIRECT_TYPE_NO_PCIE_LINK flag to the indirect pci handling code to ensure that we don't talk to any device other than the PHB if we don't have PCIe link. Some controllers will lockup if they try to do a config cycle to any device on the bus except the PHB. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/sysdev/indirect_pci.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/indirect_pci.c b/arch/powerpc/sysdev/indirect_pci.c
index c7e6e85..bc5b4e2 100644
--- a/arch/powerpc/sysdev/indirect_pci.c
+++ b/arch/powerpc/sysdev/indirect_pci.c
@@ -35,10 +35,17 @@ indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
u8 cfg_type = 0;
u32 bus_no, reg;
+ if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) {
+ if (bus->number != hose->first_busno)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if (devfn != 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
if (ppc_md.pci_exclude_device)
if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
-
+
if (hose->indirect_type & PPC_INDIRECT_TYPE_SET_CFG_TYPE)
if (bus->number != hose->first_busno)
cfg_type = 1;
@@ -83,6 +90,13 @@ indirect_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
u8 cfg_type = 0;
u32 bus_no, reg;
+ if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) {
+ if (bus->number != hose->first_busno)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if (devfn != 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
if (ppc_md.pci_exclude_device)
if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
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