scsi: megaraid_sas: Add module parameter for FW Async event logging

Add module parameter to control logging levels of async event
notifications from firmware that get logged to system log.  Also, allow
changing the value from sysfs after driver load.

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 1bd91c7fb10c0688de138f2e5abdc4b3bfc98022..8b0dc0795f64a8a66aaa1d8cad67bb0fb55a3a87 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -117,6 +117,10 @@ MODULE_PARM_DESC(perf_mode, "Performance mode (only for Aero adapters), options:
                "default mode is 'balanced'"
                );
 
+int event_log_level = MFI_EVT_CLASS_CRITICAL;
+module_param(event_log_level, int, 0644);
+MODULE_PARM_DESC(event_log_level, "Asynchronous event logging level- range is: -2(CLASS_DEBUG) to 4(CLASS_DEAD), Default: 2(CLASS_CRITICAL)");
+
 MODULE_LICENSE("GPL");
 MODULE_VERSION(MEGASAS_VERSION);
 MODULE_AUTHOR("megaraidlinux.pdl@broadcom.com");
@@ -416,7 +420,13 @@ megasas_decode_evt(struct megasas_instance *instance)
        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)
+       if ((event_log_level < MFI_EVT_CLASS_DEBUG) ||
+           (event_log_level > MFI_EVT_CLASS_DEAD)) {
+               printk(KERN_WARNING "megaraid_sas: provided event log level is out of range, setting it to default 2(CLASS_CRITICAL), permissible range is: -2 to 4\n");
+               event_log_level = MFI_EVT_CLASS_CRITICAL;
+       }
+
+       if (class_locale.members.class >= event_log_level)
                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)),
@@ -8762,6 +8772,12 @@ static int __init megasas_init(void)
                goto err_pcidrv;
        }
 
+       if ((event_log_level < MFI_EVT_CLASS_DEBUG) ||
+           (event_log_level > MFI_EVT_CLASS_DEAD)) {
+               printk(KERN_WARNING "megarid_sas: provided event log level is out of range, setting it to default 2(CLASS_CRITICAL), permissible range is: -2 to 4\n");
+               event_log_level = MFI_EVT_CLASS_CRITICAL;
+       }
+
        rval = driver_create_file(&megasas_pci_driver.driver,
                                  &driver_attr_version);
        if (rval)