megaraid_sas: Print critical firmware event messages

Print firmware events in human-readable form. This will help users track
any critical firmware events without special application support.

Sample syslogd output:

megaraid_sas 0000:02:00.0: 8619 (491648347s/0x0020/WARN) - Controller temperature threshold exceeded. This may indicate inadequate system cooling. Switching to low performance mode.

The format of logged events is:

"<pci_dev_id>: <sequence_number> (<timestamp>/<locale>/<class>) - <description>"

Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 5db31c6..ccda60d 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -273,6 +273,16 @@ enum MFI_STAT {
        MFI_STAT_INVALID_STATUS = 0xFF
 };
 
+enum mfi_evt_class {
+       MFI_EVT_CLASS_DEBUG =           -2,
+       MFI_EVT_CLASS_PROGRESS =        -1,
+       MFI_EVT_CLASS_INFO =            0,
+       MFI_EVT_CLASS_WARNING =         1,
+       MFI_EVT_CLASS_CRITICAL =        2,
+       MFI_EVT_CLASS_FATAL =           3,
+       MFI_EVT_CLASS_DEAD =            4
+};
+
 /*
  * Crash dump related defines
  */

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 11fb648..b72dce6 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -260,6 +260,66 @@ megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
 
 }
 
+static const char *
+format_timestamp(uint32_t timestamp)
+{
+       static char buffer[32];
+
+       if ((timestamp & 0xff000000) == 0xff000000)
+               snprintf(buffer, sizeof(buffer), "boot + %us", timestamp &
+               0x00ffffff);
+       else
+               snprintf(buffer, sizeof(buffer), "%us", timestamp);
+       return buffer;
+}
+
+static const char *
+format_class(int8_t class)
+{
+       static char buffer[6];
+
+       switch (class) {
+       case MFI_EVT_CLASS_DEBUG:
+               return "debug";
+       case MFI_EVT_CLASS_PROGRESS:
+               return "progress";
+       case MFI_EVT_CLASS_INFO:
+               return "info";
+       case MFI_EVT_CLASS_WARNING:
+               return "WARN";
+       case MFI_EVT_CLASS_CRITICAL:
+               return "CRIT";
+       case MFI_EVT_CLASS_FATAL:
+               return "FATAL";
+       case MFI_EVT_CLASS_DEAD:
+               return "DEAD";
+       default:
+               snprintf(buffer, sizeof(buffer), "%d", class);
+               return buffer;
+       }
+}
+
+/**
+  * megasas_decode_evt: Decode FW AEN event and print critical event
+  * for information.
+  * @instance:                 Adapter soft state
+  */
+static void
+megasas_decode_evt(struct megasas_instance *instance)
+{
+       struct megasas_evt_detail *evt_detail = instance->evt_detail;
+       union megasas_evt_class_locale class_locale;
+       class_locale.word = le32_to_cpu(evt_detail->cl.word);
+
+       if (class_locale.members.class >= MFI_EVT_CLASS_CRITICAL)
+               dev_info(&instance->pdev->dev, "%d (%s/0x%04x/%s) - %s\n",
+                       le32_to_cpu(evt_detail->seq_num),
+                       format_timestamp(le32_to_cpu(evt_detail->time_stamp)),
+                       (class_locale.members.locale),
+                       format_class(class_locale.members.class),
+                       evt_detail->description);
+}
+
 /**
 *      The following functions are defined for xscale
 *      (deviceid : 1064R, PERC5) controllers
@@ -6602,6 +6662,7 @@ megasas_aen_polling(struct work_struct *work)
        instance->ev = NULL;
        host = instance->host;
        if (instance->evt_detail) {
+               megasas_decode_evt(instance);
 
                switch (le32_to_cpu(instance->evt_detail->code)) {
                case MR_EVT_PD_INSERTED: