lspci: Decode AER Root Error Command, Root Error Status, Error Source

Decode the AER Root Error Command, Root Error Status, and Error Source
Identification registers.

Per PCIe r3.1, sec 7.10, these registers are only available for Root Ports
and Root Complex Event Collectors, so we have to check the Device/Port Type
from the PCIe capability.

The difference in the "lspci -vv" output looks like this (for a Root Port):

+       RootCmd: CERptEn- NFERptEn- FERptEn-
+       RootSta: CERcvd- MultCERcvd- UERcvd- MultUERcvd-
+                FirstFatal- NonFatalMsg- FatalMsg- IntMsg 0
+       ErrorSrc: ERR_COR: 0000 ERR_FATAL/NONFATAL: 0000

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 34 insertions, 3 deletions

diff --git a/ls-ecaps.c b/ls-ecaps.c
index 1847e8e..eae3a3d 100644
--- a/ls-ecaps.c
+++ b/ls-ecaps.c
@@ -90,9 +90,10 @@ cap_dsn(struct device *d, int where)
 }
 
 static void
-cap_aer(struct device *d, int where)
+cap_aer(struct device *d, int where, int type)
 {
   u32 l, l0, l1, l2, l3;
+  u16 w;
 
   printf("Advanced Error Reporting\n");
   if (verbose < 2)
@@ -143,6 +144,36 @@ cap_aer(struct device *d, int where)
   l2 = get_conf_long(d, where + PCI_ERR_HEADER_LOG + 8);
   l3 = get_conf_long(d, where + PCI_ERR_HEADER_LOG + 12);
   printf("\t\tHeaderLog: %08x %08x %08x %08x\n", l0, l1, l2, l3);
+
+  if (type == PCI_EXP_TYPE_ROOT_PORT || type == PCI_EXP_TYPE_ROOT_EC)
+    {
+      if (!config_fetch(d, where + PCI_ERR_ROOT_COMMAND, 12))
+        return;
+
+      l = get_conf_long(d, where + PCI_ERR_ROOT_COMMAND);
+      printf("\t\tRootCmd: CERptEn%c NFERptEn%c FERptEn%c\n",
+	    FLAG(l, PCI_ERR_ROOT_CMD_COR_EN),
+	    FLAG(l, PCI_ERR_ROOT_CMD_NONFATAL_EN),
+	    FLAG(l, PCI_ERR_ROOT_CMD_FATAL_EN));
+
+      l = get_conf_long(d, where + PCI_ERR_ROOT_STATUS);
+      printf("\t\tRootSta: CERcvd%c MultCERcvd%c UERcvd%c MultUERcvd%c\n"
+	    "\t\t\t FirstFatal%c NonFatalMsg%c FatalMsg%c IntMsg %d\n",
+	    FLAG(l, PCI_ERR_ROOT_COR_RCV),
+	    FLAG(l, PCI_ERR_ROOT_MULTI_COR_RCV),
+	    FLAG(l, PCI_ERR_ROOT_UNCOR_RCV),
+	    FLAG(l, PCI_ERR_ROOT_MULTI_UNCOR_RCV),
+	    FLAG(l, PCI_ERR_ROOT_FIRST_FATAL),
+	    FLAG(l, PCI_ERR_ROOT_NONFATAL_RCV),
+	    FLAG(l, PCI_ERR_ROOT_FATAL_RCV),
+	    PCI_ERR_MSG_NUM(l));
+
+      w = get_conf_word(d, where + PCI_ERR_ROOT_COR_SRC);
+      printf("\t\tErrorSrc: ERR_COR: %04x ", w);
+
+      w = get_conf_word(d, where + PCI_ERR_ROOT_SRC);
+      printf("ERR_FATAL/NONFATAL: %04x\n", w);
+    }
 }
 
 static void cap_dpc(struct device *d, int where)
@@ -678,7 +709,7 @@ cap_ptm(struct device *d, int where)
 }
 
 void
-show_ext_caps(struct device *d)
+show_ext_caps(struct device *d, int type)
 {
   int where = 0x100;
   char been_there[0x1000];
@@ -707,7 +738,7 @@ show_ext_caps(struct device *d)
       switch (id)
 	{
 	  case PCI_EXT_CAP_ID_AER:
-	    cap_aer(d, where);
+	    cap_aer(d, where, type);
 	    break;
 	  case PCI_EXT_CAP_ID_DPC:
 	    cap_dpc(d, where);