diff options
| author | Quinn Tran <quinn.tran@cavium.com> | 2017-06-13 20:47:23 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-27 21:21:41 -0400 |
| commit | af7bb3826a49b774332a5e8ff3f68877bdfd21c9 (patch) | |
| tree | 30271aad360ebcca631d60d86278fcdca81097a9 /drivers/scsi | |
| parent | 7c3f8fd10bab0b4d9021a11f123fd67e81ef3b0e (diff) | |
scsi: qla2xxx: use shadow register for ISP27XX
For ISP27XX, use shadow register to read FW provided REQQ's consumer
index. The shadow register is dma'ed by firmware.
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_def.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_init.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_os.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_target.c | 3 |
4 files changed, 5 insertions, 1 deletions
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index dfa001357110..b3ba32773db4 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -3266,6 +3266,7 @@ struct qla_qpair { uint32_t fw_started:1; uint32_t enable_class_2:1; uint32_t enable_explicit_conf:1; + uint32_t use_shadow_reg:1; uint16_t id; /* qp number used with FW */ uint16_t vp_idx; /* vport ID */ diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 3e5f193480f0..62c856cad7ec 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -7614,6 +7614,7 @@ struct qla_qpair *qla2xxx_create_qpair(struct scsi_qla_host *vha, int qos, qpair->vha = vha; qpair->qp_lock_ptr = &qpair->qp_lock; spin_lock_init(&qpair->qp_lock); + qpair->use_shadow_reg = IS_SHADOW_REG_CAPABLE(ha) ? 1 : 0; /* Assign available que pair id */ mutex_lock(&ha->mq_lock); diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 44be2c8237fd..1d66954b7e5a 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -384,6 +384,7 @@ static int qla2x00_alloc_queues(struct qla_hw_data *ha, struct req_que *req, ha->base_qpair->rsp = rsp; ha->base_qpair->vha = vha; ha->base_qpair->qp_lock_ptr = &ha->hardware_lock; + ha->base_qpair->use_shadow_reg = IS_SHADOW_REG_CAPABLE(ha) ? 1 : 0; /* init qpair to this cpu. Will adjust at run time. */ ha->base_qpair->msix = &ha->msix_entries[QLA_MSIX_RSP_Q]; INIT_LIST_HEAD(&ha->base_qpair->hints_list); diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 7e6c575e3e29..1d8b5f14a69c 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -2288,7 +2288,8 @@ static int qlt_check_reserve_free_req(struct qla_qpair *qpair, struct req_que *req = qpair->req; if (req->cnt < (req_cnt + 2)) { - cnt = (uint16_t)RD_REG_DWORD(req->req_q_out); + cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr : + RD_REG_DWORD_RELAXED(req->req_q_out)); if (req->ring_index < cnt) req->cnt = cnt - req->ring_index; |