[SCSI] bfa: add debugfs support
- Add debugfs support to obtain firmware trace, driver trace
and read/write to registers.
- debugfs hierarchy:
/sys/kernel/debug/bfa/host#
where the host number corresponds to the one under /sys/class/scsi_host/host#
- Following are the new debugfs entries added:
drvtrc: collect current driver trace
fwtrc: collect current firmware trace.
fwsave: collect last saved fw trace as a result of firmware crash.
regwr: write one word to chip register
regrd: read one or more words from chip register.
Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index a17800e..915a29d 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -57,6 +57,7 @@
static int fdmi_enable = BFA_TRUE;
int bfa_lun_queue_depth = BFAD_LUN_QUEUE_DEPTH;
int bfa_linkup_delay = -1;
+int bfa_debugfs_enable = 1;
module_param(os_name, charp, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(os_name, "OS name of the hba host machine");
@@ -106,6 +107,9 @@
module_param(fdmi_enable, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(fdmi_enable, "Enables fdmi registration, default=1,"
" Range[false:0|true:1]");
+module_param(bfa_debugfs_enable, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(bfa_debugfs_enable, "Enables debugfs feature, default=1,"
+ " Range[false:0|true:1]");
/*
* Stores the module parm num_sgpgs value;
@@ -903,6 +907,10 @@
bfad->pport.roles |= BFA_PORT_ROLE_FCP_IM;
}
+ /* Setup the debugfs node for this scsi_host */
+ if (bfa_debugfs_enable)
+ bfad_debugfs_init(&bfad->pport);
+
bfad->bfad_flags |= BFAD_CFG_PPORT_DONE;
out:
@@ -912,6 +920,10 @@
void
bfad_uncfg_pport(struct bfad_s *bfad)
{
+ /* Remove the debugfs node for this scsi_host */
+ kfree(bfad->regdata);
+ bfad_debugfs_exit(&bfad->pport);
+
if ((bfad->pport.roles & BFA_PORT_ROLE_FCP_IPFC) && ipfc_enable) {
bfad_ipfc_port_delete(bfad, &bfad->pport);
bfad->pport.roles &= ~BFA_PORT_ROLE_FCP_IPFC;
