diff options
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_def.h | 2 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_fw.h | 2 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_inline.h | 8 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_isr.c | 12 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_os.c | 9 |
5 files changed, 32 insertions, 1 deletions
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index d9daad7..d529510 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -2023,6 +2023,8 @@ typedef struct fc_port { unsigned long last_ramp_up; uint16_t port_id; + + unsigned long retry_delay_timestamp; } fc_port_t; #include "qla_mr.h" diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h index 7f2e1c7..42bb357 100644 --- a/drivers/scsi/qla2xxx/qla_fw.h +++ b/drivers/scsi/qla2xxx/qla_fw.h @@ -567,7 +567,7 @@ struct sts_entry_24xx { #define SF_TRANSFERRED_DATA BIT_11 #define SF_FCP_RSP_DMA BIT_0 - uint16_t reserved_2; + uint16_t retry_delay; uint16_t scsi_status; /* SCSI status. */ #define SS_CONFIRMATION_REQ BIT_12 diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h index b3b1d6f..fee9eb7 100644 --- a/drivers/scsi/qla2xxx/qla_inline.h +++ b/drivers/scsi/qla2xxx/qla_inline.h @@ -279,3 +279,11 @@ qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status) complete(&ha->mbx_intr_comp); } } + +static inline void +qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay) +{ + if (retry_delay) + fcport->retry_delay_timestamp = jiffies + + (retry_delay * HZ / 10); +} diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index 550ffdf..f15f87e 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -1983,6 +1983,7 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt) int logit = 1; int res = 0; uint16_t state_flags = 0; + uint16_t retry_delay = 0; sts = (sts_entry_t *) pkt; sts24 = (struct sts_entry_24xx *) pkt; @@ -2076,6 +2077,9 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt) host_to_fcp_swap(sts24->data, sizeof(sts24->data)); ox_id = le16_to_cpu(sts24->ox_id); par_sense_len = sizeof(sts24->data); + /* Valid values of the retry delay timer are 0x1-0xffef */ + if (sts24->retry_delay > 0 && sts24->retry_delay < 0xfff1) + retry_delay = sts24->retry_delay; } else { if (scsi_status & SS_SENSE_LEN_VALID) sense_len = le16_to_cpu(sts->req_sense_length); @@ -2110,6 +2114,14 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt) comp_status = CS_DATA_OVERRUN; /* + * Check retry_delay_timer value if we receive a busy or + * queue full. + */ + if (lscsi_status == SAM_STAT_TASK_SET_FULL || + lscsi_status == SAM_STAT_BUSY) + qla2x00_set_retry_delay_timestamp(fcport, retry_delay); + + /* * Based on Host and scsi status generate status code for Linux */ switch (comp_status) { diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index e742890..daabf8c 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -731,6 +731,15 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) goto qc24_target_busy; } + /* + * Return target busy if we've received a non-zero retry_delay_timer + * in a FCP_RSP. + */ + if (time_after(jiffies, fcport->retry_delay_timestamp)) + fcport->retry_delay_timestamp = 0; + else + goto qc24_target_busy; + sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC); if (!sp) goto qc24_host_busy; |
