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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: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Shyam Sundar 2020-10-21 02:27:14 -07:00 committed by Martin K. Petersen
parent 3dcfe0de5a
commit 846101960f
2 changed files with 8 additions and 0 deletions
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5
drivers/scsi/scsi_transport_fc.c
View File

@ -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,

3
include/scsi/scsi_transport_fc.h
View File

@ -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;
};