Commit 84610196 authored by Shyam Sundar's avatar Shyam Sundar Committed by Martin K. Petersen
Browse files

scsi: fc: Add mechanism to update FPIN signal statistics 

Under fc_host_statistics add statistics for Congestion Signals that are
delivered to the host as interrupt signals.

Link: https://lore.kernel.org/r/20201021092715.22669-5-njavali@marvell.com


Reviewed-by: default avatarJames Smart <james.smart@broadcom.com>
Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarShyam Sundar <ssundar@marvell.com>
Signed-off-by: default avatarNilesh Javali <njavali@marvell.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 3dcfe0de

drivers/scsi/scsi_transport_fc.c

+5 −0
Original line number Diff line number Diff line
@@ -2100,6 +2100,9 @@ fc_host_statistic(fc_xid_not_found); 
fc_host_statistic(fc_xid_busy);

fc_host_statistic(fc_seq_not_found);

fc_host_statistic(fc_non_bls_resp);

fc_host_statistic(cn_sig_warn);

fc_host_statistic(cn_sig_alarm);





#define fc_host_fpin_statistic(name)					\

static ssize_t fc_host_fpinstat_##name(struct device *cd,		\
@@ -2182,6 +2185,8 @@ static struct attribute *fc_statistics_attrs[] = { 
	&device_attr_host_fc_xid_busy.attr,

	&device_attr_host_fc_seq_not_found.attr,

	&device_attr_host_fc_non_bls_resp.attr,

	&device_attr_host_cn_sig_warn.attr,

	&device_attr_host_cn_sig_alarm.attr,

	&device_attr_host_reset_statistics.attr,

	&device_attr_host_fpin_dn.attr,

	&device_attr_host_fpin_dn_unknown.attr,

include/scsi/scsi_transport_fc.h

+3 −0
Original line number Diff line number Diff line
@@ -468,6 +468,9 @@ struct fc_host_statistics { 
	u64 fc_seq_not_found;		/* seq is not found for exchange */

	u64 fc_non_bls_resp;		/* a non BLS response frame with

					   a sequence responder in new exch */

	/* Host Congestion Signals */

	u64 cn_sig_warn;

	u64 cn_sig_alarm;

};