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Commit af7bb382 authored by Quinn Tran's avatar Quinn Tran Committed by Martin K. Petersen
Browse files

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: default avatarQuinn Tran <quinn.tran@cavium.com>
Signed-off-by: default avatarHimanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 7c3f8fd1

drivers/scsi/qla2xxx/qla_def.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/scsi/qla2xxx/qla_init.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/scsi/qla2xxx/qla_os.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/scsi/qla2xxx/qla_target.c

+2 −1
Original line number Diff line number Diff line
@@ -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;