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| author | James Smart <james.smart@emulex.com> | 2012-08-03 12:36:24 -0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-09-14 14:42:12 +0100 |
| commit | bf8dae83fea151ebd74492740733e2ed62dc9f51 (patch) | |
| tree | 85a04b04a8546bc542c10dd92135845712050cca /drivers/scsi/lpfc/lpfc_attr.c | |
| parent | 67d1273385d454a3f1b083b807f2cdda95e995ec (diff) | |
| download | linux-bf8dae83fea151ebd74492740733e2ed62dc9f51.tar.gz linux-bf8dae83fea151ebd74492740733e2ed62dc9f51.tar.bz2 linux-bf8dae83fea151ebd74492740733e2ed62dc9f51.zip | |
[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>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_attr.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_attr.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index 2910208b5dfa..f7c5531d984c 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -3643,14 +3643,21 @@ lpfc_fcp_imax_store(struct device *dev, struct device_attribute *attr, 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_store(struct device *dev, struct device_attribute *attr, /* # 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 @@ lpfc_param_show(fcp_imax) 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; } |