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authorKashyap, Desai <kashyap.desai@lsi.com>2009-09-23 17:28:09 +0530
committerJames Bottomley <James.Bottomley@suse.de>2009-10-29 13:03:11 -0400
commit32e0eb569df09a8cb790cf370ee498721d88e5c6 (patch)
tree719dcb9b7f3f2131217889ba038f6a7a669423ad /drivers/scsi/mpt2sas/mpt2sas_base.c
parentcef7a12cd1e0647ce2b566a76bbf4cd132b9118d (diff)
[SCSI] mpt2sas: Added command line option diag_buffer_enable.
Added command line option diag_buffer_enable. When the command line option is set, the driver will automatically post diag buffers at driver load time. The command line option diag_buffer_enable is bitwise, so it's possible to enable both and/or snapshot + trace buffers. For trace, the driver will allocate 1MB buffer, whereas for snapshot its 2MB. The purpose for this is so the enduser doesn't have to manually use an application to setup diag buffers for debugging firmware related issues. Here is some examples trace: # insmod mpt2sas.ko diag_buffer_enable=1 snapshot: # insmod mpt2sas.ko diag_buffer_enable=2 both trace and snapshot: # insmod mpt2sas.ko diag_buffer_enable=3 Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Signed-off-by: Eric Moore <Eric.moore@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/mpt2sas/mpt2sas_base.c')
-rw-r--r--drivers/scsi/mpt2sas/mpt2sas_base.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index ec3f57732e9..1d2374b5a0a 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -77,6 +77,17 @@ static int msix_disable = -1;
module_param(msix_disable, int, 0);
MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)");
+/* diag_buffer_enable is bitwise
+ * bit 0 set = MPI2_DIAG_BUF_TYPE_TRACE(1)
+ * bit 1 set = MPI2_DIAG_BUF_TYPE_SNAPSHOT(2)
+ *
+ * Either bit can be set, or both
+ */
+static int diag_buffer_enable;
+module_param(diag_buffer_enable, int, 0);
+MODULE_PARM_DESC(diag_buffer_enable, " enable diag buffer at driver load "
+ "time (TRACE=1/SNAP=2/default=0)");
+
int mpt2sas_fwfault_debug;
MODULE_PARM_DESC(mpt2sas_fwfault_debug, " enable detection of firmware fault "
"and halt firmware - (default=0)");
@@ -3588,6 +3599,8 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
goto out_free_resources;
mpt2sas_base_start_watchdog(ioc);
+ if (diag_buffer_enable != 0)
+ mpt2sas_enable_diag_buffer(ioc, diag_buffer_enable);
return 0;
out_free_resources: