aerdrv: Enhanced AER logging

This patch will provide a more reliable and easy way for user-space
applications to have access to AER logs rather than reading them from the
message buffer. It also provides a way to notify user-space when an AER
event occurs.

The aer driver is updated to generate a trace event of function 'aer_event'
when a PCIe error is reported over the AER interface.  The trace event was
added to both the interrupt based aer path and the firmware first path.

Signed-off-by: Lance Ortiz <lance.ortiz@hp.com>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Boris Petkov <bp@alien8.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
index 3ea51736f18d..d3e5fc5a2de9 100644
--- a/drivers/pci/pcie/aer/aerdrv_errprint.c
+++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
@@ -23,6 +23,9 @@
 
 #include "aerdrv.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/ras.h>
+
 #define AER_AGENT_RECEIVER              0
 #define AER_AGENT_REQUESTER             1
 #define AER_AGENT_COMPLETER             2
@@ -194,6 +197,8 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
         if (info->id && info->error_dev_num > 1 && info->id == id)
                 printk("%s""  Error of this Agent(%04x) is reported first\n",
                         prefix, id);
+        trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask),
+                        info->severity);
 }
 
 void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
@@ -217,7 +222,7 @@ int cper_severity_to_aer(int cper_severity)
 }
 EXPORT_SYMBOL_GPL(cper_severity_to_aer);
 
-void cper_print_aer(const char *prefix, int cper_severity,
+void cper_print_aer(const char *prefix, struct pci_dev *dev, int cper_severity,
                     struct aer_capability_regs *aer)
 {
         int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0;
@@ -259,5 +264,7 @@ void cper_print_aer(const char *prefix, int cper_severity,
                         *(tlp + 8), *(tlp + 15), *(tlp + 14),
                         *(tlp + 13), *(tlp + 12));
         }
+        trace_aer_event(dev_name(&dev->dev), (status & ~mask),
+                        aer_severity);
 }
 #endif