aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMike Mason <mmlnx@us.ibm.com>2009-07-30 15:42:39 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-09-09 13:29:41 -0700
commit6e19314cc98ab9ccc22c30d1c414984ac6de5ce2 (patch)
tree2e83662e5e8cc1a0c30bba06008fe1b955c94cd5
parentfe14acd4e7c8178dfb172c1e7a88356657378128 (diff)
PCI/powerpc: support PCIe fundamental reset
By default, the EEH framework on powerpc does what's known as a "hot reset" during recovery of a PCI Express device. We've found a case where the device needs a "fundamental reset" to recover properly. The current PCI error recovery and EEH frameworks do not support this distinction. The attached patch makes changes to EEH to utilize the new bit field. Signed-off-by: Mike Mason <mmlnx@us.ibm.com> Signed-off-by: Richard Lary <rlary@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
-rw-r--r--arch/powerpc/kernel/pci_64.c1
-rw-r--r--arch/powerpc/platforms/pseries/eeh.c10
2 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 9e8902fa14c..b6e9ea45a71 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -143,6 +143,7 @@ struct pci_dev *of_create_pci_dev(struct device_node *node,
dev->dev.bus = &pci_bus_type;
dev->devfn = devfn;
dev->multifunction = 0; /* maybe a lie? */
+ dev->needs_freset = 0; /* pcie fundamental reset required */
dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
dev->device = get_int_prop(node, "device-id", 0xffff);
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 989d6462c15..ccd8dd03b8c 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -744,7 +744,15 @@ int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state stat
static void __rtas_set_slot_reset(struct pci_dn *pdn)
{
- rtas_pci_slot_reset (pdn, 1);
+ struct pci_dev *dev = pdn->pcidev;
+
+ /* Determine type of EEH reset required by device,
+ * default hot reset or fundamental reset
+ */
+ if (dev->needs_freset)
+ rtas_pci_slot_reset(pdn, 3);
+ else
+ rtas_pci_slot_reset(pdn, 1);
/* The PCI bus requires that the reset be held high for at least
* a 100 milliseconds. We wait a bit longer 'just in case'. */