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>
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@ -2158,7 +2158,9 @@ __qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp)
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skip_cmd_array:
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/* Check for room on request queue. */
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if (req->cnt < req_cnt + 2) {
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if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha))
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if (qpair->use_shadow_reg)
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cnt = *req->out_ptr;
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else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha))
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cnt = RD_REG_DWORD(®->isp25mq.req_q_out);
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else if (IS_P3P_TYPE(ha))
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cnt = RD_REG_DWORD(®->isp82.req_q_out);
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