diff options
| author | Brian King <brking@linux.vnet.ibm.com> | 2007-05-08 08:04:05 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-05-08 13:40:31 +1000 |
| commit | 00c2ae35bd50664bcd841becc6efceef8aa5d074 (patch) | |
| tree | 16a952d96cf7619ad235b1990231a147c51a8840 /arch | |
| parent | 02bbc0f09c90cefdb2837605c96a66c5ce4ba2e1 (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.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 48fbd442e9d..63e23062e98 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) } /** + * 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. * |