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| author | Chad Dupuis <chad.dupuis@qlogic.com> | 2013-01-30 03:34:38 -0500 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-02-22 11:29:49 +0000 |
| commit | 3c290d0b5f8ff7b0fd2c964c5ec2c14191a9e790 (patch) | |
| tree | aeabbf158d1efef3689782c996685a2630de289c /drivers/scsi/qla2xxx/qla_def.h | |
| parent | 8d93f5502221cc8eb420da65dc86a5ef07b038d0 (diff) | |
| download | lwn-3c290d0b5f8ff7b0fd2c964c5ec2c14191a9e790.tar.gz lwn-3c290d0b5f8ff7b0fd2c964c5ec2c14191a9e790.zip | |
[SCSI] qla2xxx: Ramp down queue depth for attached SCSI devices when driver resources are low.
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_def.h')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_def.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index a84bb8d6ff74..06c6271d5911 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -2536,6 +2536,7 @@ struct req_que { srb_t **outstanding_cmds; uint32_t current_outstanding_cmd; uint16_t num_outstanding_cmds; +#define MAX_Q_DEPTH 32 int max_q_depth; }; @@ -3058,6 +3059,12 @@ struct qla_hw_data { struct work_struct idc_state_handler; struct work_struct nic_core_unrecoverable; +#define HOST_QUEUE_RAMPDOWN_INTERVAL (60 * HZ) +#define HOST_QUEUE_RAMPUP_INTERVAL (30 * HZ) + unsigned long host_last_rampdown_time; + unsigned long host_last_rampup_time; + int cfg_lun_q_depth; + struct qlt_hw_data tgt; }; @@ -3117,6 +3124,8 @@ typedef struct scsi_qla_host { #define MPI_RESET_NEEDED 19 /* Initiate MPI FW reset */ #define ISP_QUIESCE_NEEDED 20 /* Driver need some quiescence */ #define SCR_PENDING 21 /* SCR in target mode */ +#define HOST_RAMP_DOWN_QUEUE_DEPTH 22 +#define HOST_RAMP_UP_QUEUE_DEPTH 23 uint32_t device_flags; #define SWITCH_FOUND BIT_0 |