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path: root/drivers/scsi/qla4xxx/ql4_iocb.c
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Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_iocb.c')
-rw-r--r--drivers/scsi/qla4xxx/ql4_iocb.c73
1 files changed, 68 insertions, 5 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_iocb.c b/drivers/scsi/qla4xxx/ql4_iocb.c
index e66f3f263f49..f89973deac5b 100644
--- a/drivers/scsi/qla4xxx/ql4_iocb.c
+++ b/drivers/scsi/qla4xxx/ql4_iocb.c
@@ -108,8 +108,7 @@ int qla4xxx_send_marker_iocb(struct scsi_qla_host *ha,
wmb();
/* Tell ISP it's got a new I/O request */
- writel(ha->request_in, &ha->reg->req_q_in);
- readl(&ha->reg->req_q_in);
+ ha->isp_ops->queue_iocb(ha);
exit_send_marker:
spin_unlock_irqrestore(&ha->hardware_lock, flags);
@@ -194,6 +193,72 @@ static void qla4xxx_build_scsi_iocbs(struct srb *srb,
}
/**
+ * qla4_8xxx_queue_iocb - Tell ISP it's got new request(s)
+ * @ha: pointer to host adapter structure.
+ *
+ * This routine notifies the ISP that one or more new request
+ * queue entries have been placed on the request queue.
+ **/
+void qla4_8xxx_queue_iocb(struct scsi_qla_host *ha)
+{
+ uint32_t dbval = 0;
+ unsigned long wtime;
+
+ dbval = 0x14 | (ha->func_num << 5);
+ dbval = dbval | (0 << 8) | (ha->request_in << 16);
+ writel(dbval, (unsigned long __iomem *)ha->nx_db_wr_ptr);
+ wmb();
+
+ wtime = jiffies + (2 * HZ);
+ while (readl((void __iomem *)ha->nx_db_rd_ptr) != dbval &&
+ !time_after_eq(jiffies, wtime)) {
+ writel(dbval, (unsigned long __iomem *)ha->nx_db_wr_ptr);
+ wmb();
+ }
+}
+
+/**
+ * qla4_8xxx_complete_iocb - Tell ISP we're done with response(s)
+ * @ha: pointer to host adapter structure.
+ *
+ * This routine notifies the ISP that one or more response/completion
+ * queue entries have been processed by the driver.
+ * This also clears the interrupt.
+ **/
+void qla4_8xxx_complete_iocb(struct scsi_qla_host *ha)
+{
+ writel(ha->response_out, &ha->qla4_8xxx_reg->rsp_q_out);
+ readl(&ha->qla4_8xxx_reg->rsp_q_out);
+}
+
+/**
+ * qla4xxx_queue_iocb - Tell ISP it's got new request(s)
+ * @ha: pointer to host adapter structure.
+ *
+ * This routine is notifies the ISP that one or more new request
+ * queue entries have been placed on the request queue.
+ **/
+void qla4xxx_queue_iocb(struct scsi_qla_host *ha)
+{
+ writel(ha->request_in, &ha->reg->req_q_in);
+ readl(&ha->reg->req_q_in);
+}
+
+/**
+ * qla4xxx_complete_iocb - Tell ISP we're done with response(s)
+ * @ha: pointer to host adapter structure.
+ *
+ * This routine is notifies the ISP that one or more response/completion
+ * queue entries have been processed by the driver.
+ * This also clears the interrupt.
+ **/
+void qla4xxx_complete_iocb(struct scsi_qla_host *ha)
+{
+ writel(ha->response_out, &ha->reg->rsp_q_out);
+ readl(&ha->reg->rsp_q_out);
+}
+
+/**
* qla4xxx_send_command_to_isp - issues command to HBA
* @ha: pointer to host adapter structure.
* @srb: pointer to SCSI Request Block to be sent to ISP
@@ -310,9 +375,7 @@ int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb)
srb->iocb_cnt = req_cnt;
ha->req_q_count -= req_cnt;
- /* Debug print statements */
- writel(ha->request_in, &ha->reg->req_q_in);
- readl(&ha->reg->req_q_in);
+ ha->isp_ops->queue_iocb(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return QLA_SUCCESS;