[SCSI] qla4xxx: IDC implementation for Loopback
Handle IDC Request Notify AEN and post IDC Acknowledgement
while participating in Loopback IDC.
Signed-off-by: Nilesh Javali <nilesh.javali@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/qla4xxx/ql4_mbx.c b/drivers/scsi/qla4xxx/ql4_mbx.c
index f31e79b..0d3d641 100644
--- a/drivers/scsi/qla4xxx/ql4_mbx.c
+++ b/drivers/scsi/qla4xxx/ql4_mbx.c
@@ -1968,3 +1968,36 @@
exit_set_param:
return status;
}
+
+/**
+ * qla4_83xx_post_idc_ack - post IDC ACK
+ * @ha: Pointer to host adapter structure.
+ *
+ * Posts IDC ACK for IDC Request Notification AEN.
+ **/
+int qla4_83xx_post_idc_ack(struct scsi_qla_host *ha)
+{
+ uint32_t mbox_cmd[MBOX_REG_COUNT];
+ uint32_t mbox_sts[MBOX_REG_COUNT];
+ int status;
+
+ memset(&mbox_cmd, 0, sizeof(mbox_cmd));
+ memset(&mbox_sts, 0, sizeof(mbox_sts));
+
+ mbox_cmd[0] = MBOX_CMD_IDC_ACK;
+ mbox_cmd[1] = ha->idc_info.request_desc;
+ mbox_cmd[2] = ha->idc_info.info1;
+ mbox_cmd[3] = ha->idc_info.info2;
+ mbox_cmd[4] = ha->idc_info.info3;
+
+ status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, MBOX_REG_COUNT,
+ mbox_cmd, mbox_sts);
+ if (status == QLA_ERROR)
+ ql4_printk(KERN_ERR, ha, "%s: failed status %04X\n", __func__,
+ mbox_sts[0]);
+ else
+ DEBUG2(ql4_printk(KERN_INFO, ha, "%s: IDC ACK posted\n",
+ __func__));
+
+ return status;
+}