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[SCSI] lpfc 8.3.33: Allow per-hba interrupt rate tuning

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Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
James Smart 2012-08-03 12:36:24 -04:00 committed by James Bottomley
parent 67d1273385
commit bf8dae83fe
4 changed files with 28 additions and 12 deletions
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27
drivers/scsi/lpfc/lpfc_attr.c
View file

@ -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;
}

8
drivers/scsi/lpfc/lpfc_hw4.h
View file

@ -189,9 +189,11 @@ struct lpfc_sli_intf {
/* Delay Multiplier constant */
#define LPFC_DMULT_CONST 651042
#define LPFC_MIM_IMAX 636
#define LPFC_FP_DEF_IMAX 10000
#define LPFC_SP_DEF_IMAX 10000
/* Configuration of Interrupts / sec for entire HBA port */
#define LPFC_MIN_IMAX 5000
#define LPFC_MAX_IMAX 5000000
#define LPFC_DEF_IMAX 50000
/* PORT_CAPABILITIES constants. */
#define LPFC_MAX_SUPPORTED_PAGES 8

2
drivers/scsi/lpfc/lpfc_init.c
View file

@ -6927,7 +6927,7 @@ lpfc_sli4_queue_setup(struct lpfc_hba *phba)
goto out_destroy_hba_eq;
}
rc = lpfc_eq_create(phba, phba->sli4_hba.hba_eq[fcp_eqidx],
phba->cfg_fcp_imax);
(phba->cfg_fcp_imax / phba->cfg_fcp_io_channel));
if (rc) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"0523 Failed setup of fast-path EQ "

3
drivers/scsi/lpfc/lpfc_sli.c
View file

@ -12079,7 +12079,8 @@ lpfc_modify_fcp_eq_delay(struct lpfc_hba *phba, uint16_t startq)
eq_delay = &mbox->u.mqe.un.eq_delay;
/* Calculate delay multiper from maximum interrupt per second */
dmult = LPFC_DMULT_CONST/phba->cfg_fcp_imax - 1;
dmult = phba->cfg_fcp_imax / phba->cfg_fcp_io_channel;
dmult = LPFC_DMULT_CONST/dmult - 1;
cnt = 0;
for (fcp_eqidx = startq; fcp_eqidx < phba->cfg_fcp_io_channel;