[PATCH] powerpc: handle multifunction PCI devices properly
239-eeh-multifunction-consolidate.patch
New-style firmware will often place multiple different functions
under a non-EEH-aware parent. However, these devices might share
a common PE "partition endpoint" and config address, ad thus any
EEH events will affect all of the devices in common. This patch
makes the effort to find all of these common devices and handle
them together.
Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
(cherry picked from 216810296bb97d39da8e176822e9de78d2f00187 commit)
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index b0fa76d..02bc1f9 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -223,6 +223,11 @@
void eeh_mark_slot (struct device_node *dn, int mode_flag)
{
dn = find_device_pe (dn);
+
+ /* Back up one, since config addrs might be shared */
+ if (PCI_DN(dn) && PCI_DN(dn)->eeh_pe_config_addr)
+ dn = dn->parent;
+
PCI_DN(dn)->eeh_mode |= mode_flag;
__eeh_mark_slot (dn->child, mode_flag);
}
@@ -244,7 +249,13 @@
{
unsigned long flags;
spin_lock_irqsave(&confirm_error_lock, flags);
+
dn = find_device_pe (dn);
+
+ /* Back up one, since config addrs might be shared */
+ if (PCI_DN(dn) && PCI_DN(dn)->eeh_pe_config_addr)
+ dn = dn->parent;
+
PCI_DN(dn)->eeh_mode &= ~mode_flag;
PCI_DN(dn)->eeh_check_count = 0;
__eeh_clear_slot (dn->child, mode_flag);
@@ -609,7 +620,7 @@
if (!pdn)
return;
- if (! pdn->eeh_is_bridge)
+ if ((pdn->eeh_mode & EEH_MODE_SUPPORTED) && (!pdn->eeh_is_bridge))
__restore_bars (pdn);
dn = pdn->node->child;
diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c
index 242b292..1c97c89 100644
--- a/arch/powerpc/platforms/pseries/eeh_driver.c
+++ b/arch/powerpc/platforms/pseries/eeh_driver.c
@@ -213,9 +213,23 @@
if (rc)
return rc;
- /* Walk over all functions on this device */
- rtas_configure_bridge(pe_dn);
- eeh_restore_bars(pe_dn);
+ /* New-style config addrs might be shared across multiple devices,
+ * Walk over all functions on this device */
+ if (pe_dn->eeh_pe_config_addr) {
+ struct device_node *pe = pe_dn->node;
+ pe = pe->parent->child;
+ while (pe) {
+ struct pci_dn *ppe = PCI_DN(pe);
+ if (pe_dn->eeh_pe_config_addr == ppe->eeh_pe_config_addr) {
+ rtas_configure_bridge(ppe);
+ eeh_restore_bars(ppe);
+ }
+ pe = pe->sibling;
+ }
+ } else {
+ rtas_configure_bridge(pe_dn);
+ eeh_restore_bars(pe_dn);
+ }
/* Give the system 5 seconds to finish running the user-space
* hotplug shutdown scripts, e.g. ifdown for ethernet. Yes,