From: Justin Tee <justin.tee@broadcom.com>
Date: Mon, 17 Oct 2022 09:43:21 -0700
Subject: scsi: lpfc: Log when congestion management limits are in effect
Patch-mainline: v6.2-rc1
Git-commit: eaf660e4282ba11239704b2b89ae94feae2010e0
References: bsc#1204957
When bandwidth reduces from or recovers back to 100% due to congestion
management, log the event.
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20221017164323.14536-3-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/scsi/lpfc/lpfc_sli.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -1848,6 +1848,18 @@ lpfc_cmf_sync_cmpl(struct lpfc_hba *phba
phba->cmf_link_byte_count);
bwpcent = div64_u64(bw * 100 + slop,
phba->cmf_link_byte_count);
+
+ if (phba->cmf_max_bytes_per_interval < bw &&
+ bwpcent > 95)
+ lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
+ "6208 Congestion bandwidth "
+ "limits removed\n");
+ else if ((phba->cmf_max_bytes_per_interval > bw) &&
+ ((bwpcent + pcent) <= 100) && ((bwpcent + pcent) > 95))
+ lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
+ "6209 Congestion bandwidth "
+ "limits in effect\n");
+
if (asig) {
lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
"6237 BW Threshold %lld%% (%lld): "