[SCSI] lpfc 8.3.33: Allow per-hba interrupt rate tuning
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 2910208..f7c5531 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -3643,14 +3643,21 @@
struct lpfc_hba *phba = vport->phba;
int val = 0, i;
+ /* fcp_imax is only valid for SLI4 */
+ if (phba->sli_rev != LPFC_SLI_REV4)
+ return -EINVAL;
+
/* Sanity check on user data */
if (!isdigit(buf[0]))
return -EINVAL;
if (sscanf(buf, "%i", &val) != 1)
return -EINVAL;
- /* Value range is [636,651042] */
- if (val < LPFC_MIM_IMAX || val > LPFC_DMULT_CONST)
+ /*
+ * Value range for the HBA is [5000,5000000]
+ * The value for each EQ depends on how many EQs are configured.
+ */
+ if (val < LPFC_MIN_IMAX || val > LPFC_MAX_IMAX)
return -EINVAL;
phba->cfg_fcp_imax = (uint32_t)val;
@@ -3662,13 +3669,14 @@
/*
# lpfc_fcp_imax: The maximum number of fast-path FCP interrupts per second
+# for the HBA.
#
-# Value range is [636,651042]. Default value is 10000.
+# Value range is [5,000 to 5,000,000]. Default value is 50,000.
*/
-static int lpfc_fcp_imax = LPFC_FP_DEF_IMAX;
+static int lpfc_fcp_imax = LPFC_DEF_IMAX;
module_param(lpfc_fcp_imax, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lpfc_fcp_imax,
- "Set the maximum number of fast-path FCP interrupts per second");
+ "Set the maximum number of FCP interrupts per second per HBA");
lpfc_param_show(fcp_imax)
/**
@@ -3687,14 +3695,19 @@
static int
lpfc_fcp_imax_init(struct lpfc_hba *phba, int val)
{
- if (val >= LPFC_MIM_IMAX && val <= LPFC_DMULT_CONST) {
+ if (phba->sli_rev != LPFC_SLI_REV4) {
+ phba->cfg_fcp_imax = 0;
+ return 0;
+ }
+
+ if (val >= LPFC_MIN_IMAX && val <= LPFC_MAX_IMAX) {
phba->cfg_fcp_imax = val;
return 0;
}
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"3016 fcp_imax: %d out of range, using default\n", val);
- phba->cfg_fcp_imax = LPFC_FP_DEF_IMAX;
+ phba->cfg_fcp_imax = LPFC_DEF_IMAX;
return 0;
}