From bcafad6c2d520df42c86f28357d639deac15bad7 Mon Sep 17 00:00:00 2001 From: Arun Easi Date: Mon, 29 Mar 2021 01:52:18 -0700 Subject: [PATCH] scsi: qla2xxx: Fix IOPS drop seen in some adapters Removing the response queue processing in the send path is showing IOPS drop. Add back the process_response_queue() call in the send path. Link: https://lore.kernel.org/r/20210329085229.4367-2-njavali@marvell.com Reviewed-by: Himanshu Madhani Signed-off-by: Arun Easi Signed-off-by: Nilesh Javali Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_iocb.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c index c89e6d0f3616a..fea3a92e77244 100644 --- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -1600,12 +1600,14 @@ qla24xx_start_scsi(srb_t *sp) uint16_t req_cnt; uint16_t tot_dsds; struct req_que *req = NULL; + struct rsp_que *rsp; struct scsi_cmnd *cmd = GET_CMD_SP(sp); struct scsi_qla_host *vha = sp->vha; struct qla_hw_data *ha = vha->hw; /* Setup device pointers. */ req = vha->req; + rsp = req->rsp; /* So we know we haven't pci_map'ed anything yet */ tot_dsds = 0; @@ -1707,6 +1709,11 @@ qla24xx_start_scsi(srb_t *sp) /* Set chip new ring index. */ wrt_reg_dword(req->req_q_in, req->ring_index); + /* Manage unprocessed RIO/ZIO commands in response queue. */ + if (vha->flags.process_response_queue && + rsp->ring_ptr->signature != RESPONSE_PROCESSED) + qla24xx_process_response_queue(vha, rsp); + spin_unlock_irqrestore(&ha->hardware_lock, flags); return QLA_SUCCESS; @@ -1897,6 +1904,11 @@ qla24xx_dif_start_scsi(srb_t *sp) /* Set chip new ring index. */ wrt_reg_dword(req->req_q_in, req->ring_index); + /* Manage unprocessed RIO/ZIO commands in response queue. */ + if (vha->flags.process_response_queue && + rsp->ring_ptr->signature != RESPONSE_PROCESSED) + qla24xx_process_response_queue(vha, rsp); + spin_unlock_irqrestore(&ha->hardware_lock, flags); return QLA_SUCCESS; @@ -1931,6 +1943,7 @@ qla2xxx_start_scsi_mq(srb_t *sp) uint16_t req_cnt; uint16_t tot_dsds; struct req_que *req = NULL; + struct rsp_que *rsp; struct scsi_cmnd *cmd = GET_CMD_SP(sp); struct scsi_qla_host *vha = sp->fcport->vha; struct qla_hw_data *ha = vha->hw; @@ -1941,6 +1954,7 @@ qla2xxx_start_scsi_mq(srb_t *sp) /* Setup qpair pointers */ req = qpair->req; + rsp = qpair->rsp; /* So we know we haven't pci_map'ed anything yet */ tot_dsds = 0; @@ -2041,6 +2055,11 @@ qla2xxx_start_scsi_mq(srb_t *sp) /* Set chip new ring index. */ wrt_reg_dword(req->req_q_in, req->ring_index); + /* Manage unprocessed RIO/ZIO commands in response queue. */ + if (vha->flags.process_response_queue && + rsp->ring_ptr->signature != RESPONSE_PROCESSED) + qla24xx_process_response_queue(vha, rsp); + spin_unlock_irqrestore(&qpair->qp_lock, flags); return QLA_SUCCESS; -- 2.30.2