From bf8dae83fea151ebd74492740733e2ed62dc9f51 Mon Sep 17 00:00:00 2001 From: James Smart Date: Fri, 3 Aug 2012 12:36:24 -0400 Subject: [PATCH] [SCSI] lpfc 8.3.33: Allow per-hba interrupt rate tuning Signed-off-by: James Smart Signed-off-by: James Bottomley --- drivers/scsi/lpfc/lpfc_attr.c | 27 ++++++++++++++++++++------- drivers/scsi/lpfc/lpfc_hw4.h | 8 +++++--- drivers/scsi/lpfc/lpfc_init.c | 2 +- drivers/scsi/lpfc/lpfc_sli.c | 3 ++- 4 files changed, 28 insertions(+), 12 deletions(-) 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 @@ 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; } diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h index 9f5c93c..821262d 100644 --- a/drivers/scsi/lpfc/lpfc_hw4.h +++ b/drivers/scsi/lpfc/lpfc_hw4.h @@ -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 diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 164aa87..3dad5ff 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -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 " diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 8cbbd81..0d5dab3 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -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; -- 2.7.4