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authorLinas Vepstas <linas@linas.org>2005-11-03 18:50:48 -0600
committerPaul Mackerras <paulus@samba.org>2005-11-10 16:00:32 +1100
commitd9564ad11454581f85b77026f290f4bb24eecf25 (patch)
tree33aac0695124ad73a16a9b3d15458c4463804783 /arch
parent0c95fbb25602caa02ef697c3852cd61f9829e6ff (diff)
downloadop-kernel-dev-d9564ad11454581f85b77026f290f4bb24eecf25.zip
op-kernel-dev-d9564ad11454581f85b77026f290f4bb24eecf25.tar.gz
[PATCH] ppc64: mark failed devices
17-eeh-slot-marking-bug.patch A device that experiences a PCI outage may be just one deivce out of many that was affected. In order to avoid repeated reports of a failure, the entire tree of affected devices should be marked as failed. This patch marks up the entire tree. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/pseries/eeh.c48
1 files changed, 32 insertions, 16 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 3a857b2..79de231 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -478,32 +478,47 @@ static struct device_node * find_device_pe(struct device_node *dn)
* an interrupt context, which is bad.
*/
-static void __eeh_mark_slot (struct device_node *dn)
+static void __eeh_mark_slot (struct device_node *dn, int mode_flag)
{
while (dn) {
- PCI_DN(dn)->eeh_mode |= EEH_MODE_ISOLATED;
+ if (PCI_DN(dn)) {
+ PCI_DN(dn)->eeh_mode |= mode_flag;
- if (dn->child)
- __eeh_mark_slot (dn->child);
+ if (dn->child)
+ __eeh_mark_slot (dn->child, mode_flag);
+ }
dn = dn->sibling;
}
}
-static void __eeh_clear_slot (struct device_node *dn)
+void eeh_mark_slot (struct device_node *dn, int mode_flag)
+{
+ dn = find_device_pe (dn);
+ PCI_DN(dn)->eeh_mode |= mode_flag;
+ __eeh_mark_slot (dn->child, mode_flag);
+}
+
+static void __eeh_clear_slot (struct device_node *dn, int mode_flag)
{
while (dn) {
- PCI_DN(dn)->eeh_mode &= ~EEH_MODE_ISOLATED;
- if (dn->child)
- __eeh_clear_slot (dn->child);
+ if (PCI_DN(dn)) {
+ PCI_DN(dn)->eeh_mode &= ~mode_flag;
+ PCI_DN(dn)->eeh_check_count = 0;
+ if (dn->child)
+ __eeh_clear_slot (dn->child, mode_flag);
+ }
dn = dn->sibling;
}
}
-static inline void eeh_clear_slot (struct device_node *dn)
+void eeh_clear_slot (struct device_node *dn, int mode_flag)
{
unsigned long flags;
spin_lock_irqsave(&confirm_error_lock, flags);
- __eeh_clear_slot (dn);
+ dn = find_device_pe (dn);
+ PCI_DN(dn)->eeh_mode &= ~mode_flag;
+ PCI_DN(dn)->eeh_check_count = 0;
+ __eeh_clear_slot (dn->child, mode_flag);
spin_unlock_irqrestore(&confirm_error_lock, flags);
}
@@ -528,7 +543,6 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
int rets[3];
unsigned long flags;
struct pci_dn *pdn;
- struct device_node *pe_dn;
int rc = 0;
__get_cpu_var(total_mmio_ffs)++;
@@ -630,8 +644,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
/* Avoid repeated reports of this failure, including problems
* with other functions on this device, and functions under
* bridges. */
- pe_dn = find_device_pe (dn);
- __eeh_mark_slot (pe_dn);
+ eeh_mark_slot (dn, EEH_MODE_ISOLATED);
spin_unlock_irqrestore(&confirm_error_lock, flags);
eeh_send_failure_event (dn, dev, rets[0], rets[2]);
@@ -743,9 +756,6 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state)
rc, state, pdn->node->full_name);
return;
}
-
- if (state == 0)
- eeh_clear_slot (pdn->node->parent->child);
}
/** rtas_set_slot_reset -- assert the pci #RST line for 1/4 second
@@ -764,6 +774,12 @@ rtas_set_slot_reset(struct pci_dn *pdn)
#define PCI_BUS_RST_HOLD_TIME_MSEC 250
msleep (PCI_BUS_RST_HOLD_TIME_MSEC);
+
+ /* We might get hit with another EEH freeze as soon as the
+ * pci slot reset line is dropped. Make sure we don't miss
+ * these, and clear the flag now. */
+ eeh_clear_slot (pdn->node, EEH_MODE_ISOLATED);
+
rtas_pci_slot_reset (pdn, 0);
/* After a PCI slot has been reset, the PCI Express spec requires
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