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 <brking@xxxxxxxxxxxxxxxxxx>
---
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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