[POWERPC] EEH: Dump PCI bridge status on event

Gather bridge-specific data on EEH events.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
----
 arch/powerpc/platforms/pseries/eeh.c |   27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 26 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 34f87682e092..41b64b370fc6 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -169,6 +169,8 @@ static void rtas_slot_error_detail(struct pci_dn *pdn, int severity,
  */
 static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
 {
+        struct device_node *dn;
+        struct pci_dev *dev = pdn->pcidev;
         u32 cfg;
         int cap, i;
         int n = 0;
@@ -184,6 +186,17 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
         n += scnprintf(buf+n, len-n, "cmd/stat:%x\n", cfg);
         printk(KERN_WARNING "EEH: PCI cmd/status register: %08x\n", cfg);
 
+        /* Gather bridge-specific registers */
+        if (dev->class >> 16 == PCI_BASE_CLASS_BRIDGE) {
+                rtas_read_config(pdn, PCI_SEC_STATUS, 2, &cfg);
+                n += scnprintf(buf+n, len-n, "sec stat:%x\n", cfg);
+                printk(KERN_WARNING "EEH: Bridge secondary status: %04x\n", cfg);
+
+                rtas_read_config(pdn, PCI_BRIDGE_CONTROL, 2, &cfg);
+                n += scnprintf(buf+n, len-n, "brdg ctl:%x\n", cfg);
+                printk(KERN_WARNING "EEH: Bridge control: %04x\n", cfg);
+        }
+
         /* Dump out the PCI-X command and status regs */
         cap = pci_find_capability(pdn->pcidev, PCI_CAP_ID_PCIX);
         if (cap) {
@@ -209,7 +222,7 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
                         printk(KERN_WARNING "EEH: PCI-E %02x: %08x\n", i, cfg);
                 }
 
-                cap = pci_find_ext_capability(pdn->pcidev,PCI_EXT_CAP_ID_ERR);
+                cap = pci_find_ext_capability(pdn->pcidev, PCI_EXT_CAP_ID_ERR);
                 if (cap) {
                         n += scnprintf(buf+n, len-n, "pci-e AER:\n");
                         printk(KERN_WARNING
@@ -222,6 +235,18 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
                         }
                 }
         }
+
+        /* Gather status on devices under the bridge */
+        if (dev->class >> 16 == PCI_BASE_CLASS_BRIDGE) {
+                dn = pdn->node->child;
+                while (dn) {
+                        pdn = PCI_DN(dn);
+                        if (pdn)
+                                n += gather_pci_data(pdn, buf+n, len-n);
+                        dn = dn->sibling;
+                }
+        }
+
         return n;
 }