While doing recovery from fenced PHB, we need hold the PCI-CFG and
I/O access until the complete PHB reset and BARs restore are done.
The patch addresses that.
Signed-off-by: Gavin Shan <sha...@linux.vnet.ibm.com>
---
arch/powerpc/kernel/eeh_driver.c | 11 +++++++++++
arch/powerpc/platforms/powernv/eeh-ioda.c | 10 ++++++++--
2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 0974e13..944e225 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -349,12 +349,14 @@ static void *eeh_report_failure(void *data, void
*userdata)
*/
static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus)
{
+ struct pci_controller *hose;
struct timeval tstamp;
int cnt, rc;
/* pcibios will clear the counter; save the value */
cnt = pe->freeze_count;
tstamp = pe->tstamp;
+ hose = (pe->type & EEH_PE_PHB) ? pe->phb : NULL;
/*
* We don't remove the corresponding PE instances because
@@ -377,6 +379,15 @@ static int eeh_reset_device(struct eeh_pe *pe, struct
pci_bus *bus)
eeh_ops->configure_bridge(pe);
eeh_pe_restore_bars(pe);
+ /*
+ * If we're recovering fenced PHB, the PCI-CFG and I/O should
+ * have been blocked. We need reenable that.
+ */
+ if (hose) {
+ eeh_ops->set_setting(EEH_SETTING_BLOCK_CFG, 0, hose);
+ eeh_ops->set_setting(EEH_SETTING_BLOCK_IO, 0, hose);
+ }
+
/* Give the system 5 seconds to finish running the user-space
* hotplug shutdown scripts, e.g. ifdown for ethernet. Yes,
* this is a hack, but if we don't do this, and try to bring
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c
b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 64c3d1e..23c2442 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -922,7 +922,9 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
list_for_each_entry_safe(hose, tmp,
&hose_list, list_node) {
phb = hose->private_data;
- phb->eeh_state |= PNV_EEH_STATE_REMOVED;
+ phb->eeh_state |=
(PNV_EEH_STATE_REMOVED |
+
PNV_EEH_STATE_IO_BLOCKED |
+
PNV_EEH_STATE_IO_BLOCKED);
}
WARN(1, "EEH: dead IOC detected\n");
@@ -939,7 +941,9 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
WARN(1, "EEH: dead PHB#%x detected\n",
hose->global_number);
- phb->eeh_state |= PNV_EEH_STATE_REMOVED;
+ phb->eeh_state |= (PNV_EEH_STATE_REMOVED |
+ PNV_EEH_STATE_CFG_BLOCKED |
+ PNV_EEH_STATE_IO_BLOCKED);
ret = 3;
goto out;
} else if (severity == OPAL_EEH_SEV_PHB_FENCED) {
@@ -948,6 +952,8 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
WARN(1, "EEH: fenced PHB#%x detected\n",
hose->global_number);
+ phb->eeh_state |= (PNV_EEH_STATE_CFG_BLOCKED |
+ PNV_EEH_STATE_IO_BLOCKED);
ret = 2;
goto out;
} else if (severity == OPAL_EEH_SEV_INF)
--
1.7.5.4
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