[PATCH 4/4] powerpc: EEH: log all PCI-X and PCI-E AER registers

[Linas Vepstas]

When an EEH event is detected, and after the device driver
has been notified, but before the device is reset, enable
MMIO to the adapter, and grab the contents of the PCI status 
and command registers, the PCI-X status and command, and the
PCI-E capability 10 and AER registers. Pass these up to the
RTAS error log, and also printk them.

Signed-off-by: Linas Vepstas <linas at austin.ibm.com>

----
 arch/powerpc/platforms/pseries/eeh.c |   48 +++++++++++++++++++++++++++++++++--
 1 file changed, 46 insertions(+), 2 deletions(-)

Index: linux-2.6.21-rc7-mm2/arch/powerpc/platforms/pseries/eeh.c
===================================================================
--- linux-2.6.21-rc7-mm2.orig/arch/powerpc/platforms/pseries/eeh.c	2007-04-26 16:19:28.000000000 -0500
+++ linux-2.6.21-rc7-mm2/arch/powerpc/platforms/pseries/eeh.c	2007-04-26 16:19:32.000000000 -0500
@@ -160,14 +160,58 @@ static void rtas_slot_error_detail(struc
 static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
 {
 	u32 cfg;
+	int cap, i;
 	int n = 0;
 
-	n += scnprintf(buf+n, len-n, "%s\n", pdn->node->name);
+	n += scnprintf(buf+n, len-n, "%s\n", pdn->node->full_name);
+	printk(KERN_WARNING "EEH: of node=%s\n", pdn->node->full_name);
+
 	rtas_read_config(pdn, PCI_VENDOR_ID, 4, &cfg);
-	n += scnprintf(buf+n, len-n, "dev/vend:%x\n", cfg);
+	n += scnprintf(buf+n, len-n, "dev/vend:%08x\n", cfg);
+	printk(KERN_WARNING "EEH: PCI device/vendor: %08x\n", cfg);
+
 	rtas_read_config(pdn, PCI_COMMAND, 4, &cfg);
 	n += scnprintf(buf+n, len-n, "cmd/stat:%x\n", cfg);
+	printk(KERN_WARNING "EEH: PCI cmd/status register: %08x\n", cfg);
+
+	/* Dump out the PCI-X command and status regs */
+	cap = pci_find_capability(pdn->pcidev, PCI_CAP_ID_PCIX);
+	if (cap) {
+		rtas_read_config(pdn, cap, 4, &cfg);
+		n += scnprintf(buf+n, len-n, "pcix-cmd:%x\n", cfg);
+		printk(KERN_WARNING "EEH: PCI-X cmd: %08x\n", cfg);
+
+		rtas_read_config(pdn, cap+4, 4, &cfg);
+		n += scnprintf(buf+n, len-n, "pcix-stat:%x\n", cfg);
+		printk(KERN_WARNING "EEH: PCI-X status: %08x\n", cfg);
+	}
+
+	/* If PCI-E capable, dump PCI-E cap 10, and the AER */
+	cap = pci_find_capability(pdn->pcidev, PCI_CAP_ID_EXP);
+	if (cap) {
+		n += scnprintf(buf+n, len-n, "pci-e cap10:\n");
+		printk(KERN_WARNING
+		       "EEH: PCI-E capabilities and status follow:\n");
+
+		for (i=0; i<=8; i++) {
+			rtas_read_config(pdn, cap+4*i, 4, &cfg);
+			n += scnprintf(buf+n, len-n, "%02x:%x\n", 4*i, cfg);
+			printk(KERN_WARNING "EEH: PCI-E %02x: %08x\n", i, cfg);
+		}
 
+		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
+			       "EEH: PCI-E AER capability register set follows:\n");
+
+			for (i=0; i<14; i++) {
+				rtas_read_config(pdn, cap+4*i, 4, &cfg);
+				n += scnprintf(buf+n, len-n, "%02x:%x\n", 4*i, cfg);
+				printk(KERN_WARNING "EEH: PCI-E AER %02x: %08x\n", i, cfg);
+			}
+		}
+	}
 	return n;
 }