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>
rc, state, pdn->node->full_name);
}
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.
/**
* rtas_set_slot_reset -- assert the pci #RST line for 1/4 second
* @pdn: pci device node to be reset.