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| author | James Smart <jsmart2021@gmail.com> | 2017-06-01 21:07:10 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-12 21:37:31 -0400 |
| commit | 0cf07f84dd32639394084b9d6794424587a38789 (patch) | |
| tree | 7a87d71176fb3576d93c3b5cb34f557f55c04c50 /drivers/scsi/lpfc/lpfc_hw4.h | |
| parent | 78e1d2009f1c539a23f470728e530a3ce1d527e6 (diff) | |
| download | linux-0cf07f84dd32639394084b9d6794424587a38789.tar.gz | |
scsi: lpfc: Add auto EQ delay logic
Administrator intervention is currently required to get good numbers when switching from running latency tests to IOPS tests. The configured interrupt coalescing values will greatly effect the results of these tests. Currently, the driver has a single coalescing value set by values of the module attribute. This patch changes the driver to support auto-configuration of the coalescing value based on the total number of outstanding IOs and average number of CQEs processed per interrupt for an EQ. Values are checked every 5 seconds. The driver defaults to the automatic selection. Automatic selection can be disabled by the new lpfc_auto_imax module_parameter. Older hardware can only change interrupt coalescing by mailbox command. Newer hardware supports change via a register. The patch support both. Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <james.smart@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_hw4.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_hw4.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h index e0a5fce416ae..bb4715705fa3 100644 --- a/drivers/scsi/lpfc/lpfc_hw4.h +++ b/drivers/scsi/lpfc/lpfc_hw4.h @@ -197,6 +197,7 @@ struct lpfc_sli_intf { /* Delay Multiplier constant */ #define LPFC_DMULT_CONST 651042 +#define LPFC_DMULT_MAX 1023 /* Configuration of Interrupts / sec for entire HBA port */ #define LPFC_MIN_IMAX 5000 @@ -657,6 +658,15 @@ struct lpfc_register { #define LPFC_CTL_PORT_ER1_OFFSET 0x40C #define LPFC_CTL_PORT_ER2_OFFSET 0x410 +#define LPFC_CTL_PORT_EQ_DELAY_OFFSET 0x418 +#define lpfc_sliport_eqdelay_delay_SHIFT 16 +#define lpfc_sliport_eqdelay_delay_MASK 0xffff +#define lpfc_sliport_eqdelay_delay_WORD word0 +#define lpfc_sliport_eqdelay_id_SHIFT 0 +#define lpfc_sliport_eqdelay_id_MASK 0xfff +#define lpfc_sliport_eqdelay_id_WORD word0 +#define LPFC_SEC_TO_USEC 1000000 + /* The following Registers apply to SLI4 if_type 0 UCNAs. They typically * reside in BAR 2. */ @@ -3258,6 +3268,10 @@ struct lpfc_sli4_parameters { #define cfg_xib_SHIFT 4 #define cfg_xib_MASK 0x00000001 #define cfg_xib_WORD word19 +#define cfg_eqdr_SHIFT 8 +#define cfg_eqdr_MASK 0x00000001 +#define cfg_eqdr_WORD word19 +#define LPFC_NODELAY_MAX_IO 32 }; #define LPFC_SET_UE_RECOVERY 0x10 |