From aa6fbb757ab6fce4647bafd28f9a49e5b0fa07db Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@emulex.com>
Date: Fri, 3 Aug 2012 12:36:03 -0400
Subject: [PATCH] [SCSI] lpfc 8.3.33: Add Interrupts per second stats via
debugfs
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
drivers/scsi/lpfc/lpfc_sli.c | 18 +++++++++++++++++-
drivers/scsi/lpfc/lpfc_sli.h | 2 ++
2 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 982bd40353ec..83a1c9e4902d 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -2825,10 +2825,26 @@ lpfc_sli_rsp_pointers_error(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
void lpfc_poll_eratt(unsigned long ptr)
{
struct lpfc_hba *phba;
- uint32_t eratt = 0;
+ uint32_t eratt = 0, rem;
+ uint64_t sli_intr, cnt;
phba = (struct lpfc_hba *)ptr;
+ /* Here we will also keep track of interrupts per sec of the hba */
+ sli_intr = phba->sli.slistat.sli_intr;
+
+ if (phba->sli.slistat.sli_prev_intr > sli_intr)
+ cnt = (((uint64_t)(-1) - phba->sli.slistat.sli_prev_intr) +
+ sli_intr);
+ else
+ cnt = (sli_intr - phba->sli.slistat.sli_prev_intr);
+
+ /* 64-bit integer division not supporte on 32-bit x86 - use do_div */
+ rem = do_div(cnt, LPFC_ERATT_POLL_INTERVAL);
+ phba->sli.slistat.sli_ips = cnt;
+
+ phba->sli.slistat.sli_prev_intr = sli_intr;
+
/* Check chip HA register for error event */
eratt = lpfc_sli_check_eratt(phba);
diff --git a/drivers/scsi/lpfc/lpfc_sli.h b/drivers/scsi/lpfc/lpfc_sli.h
index 4b9b44e8e064..2f48d000a3b4 100644
--- a/drivers/scsi/lpfc/lpfc_sli.h
+++ b/drivers/scsi/lpfc/lpfc_sli.h
@@ -255,6 +255,8 @@ struct lpfc_sli_stat {
uint64_t mbox_stat_err; /* Mbox cmds completed status error */
uint64_t mbox_cmd; /* Mailbox commands issued */
uint64_t sli_intr; /* Count of Host Attention interrupts */
+ uint64_t sli_prev_intr; /* Previous cnt of Host Attention interrupts */
+ uint64_t sli_ips; /* Host Attention interrupts per sec */
uint32_t err_attn_event; /* Error Attn event counters */
uint32_t link_event; /* Link event counters */
uint32_t mbox_event; /* Mailbox event counters */
--
2.34.1