[SCSI] qla4xxx: Added restore factory defaults support using BSG

This command will causes the firmware to update all
configurations to pre-defined factory default settings.

Signed-off-by: Harish Zunjarrao <harish.zunjarrao@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla4xxx/ql4_bsg.c

@@ -337,6 +337,50 @@ leave:
 	return rval;
 }
 
+static int
+qla4xxx_restore_defaults(struct bsg_job *bsg_job)
+{
+	struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
+	struct scsi_qla_host *ha = to_qla_host(host);
+	struct iscsi_bsg_request *bsg_req = bsg_job->request;
+	struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
+	uint32_t region = 0;
+	uint32_t field0 = 0;
+	uint32_t field1 = 0;
+	int rval = -EINVAL;
+
+	bsg_reply->reply_payload_rcv_len = 0;
+
+	if (unlikely(pci_channel_offline(ha->pdev)))
+		goto leave;
+
+	if (is_qla4010(ha))
+		goto leave;
+
+	if (ql4xxx_reset_active(ha)) {
+		ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
+		rval = -EBUSY;
+		goto leave;
+	}
+
+	region = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
+	field0 = bsg_req->rqst_data.h_vendor.vendor_cmd[2];
+	field1 = bsg_req->rqst_data.h_vendor.vendor_cmd[3];
+
+	rval = qla4xxx_restore_factory_defaults(ha, region, field0, field1);
+	if (rval) {
+		ql4_printk(KERN_ERR, ha, "%s: set nvram failed\n", __func__);
+		bsg_reply->result = DID_ERROR << 16;
+		rval = -EIO;
+	} else
+		bsg_reply->result = DID_OK << 16;
+
+	bsg_job_done(bsg_job, bsg_reply->result,
+		     bsg_reply->reply_payload_rcv_len);
+leave:
+	return rval;
+}
+
 /**
  * qla4xxx_process_vendor_specific - handle vendor specific bsg request
  * @job: iscsi_bsg_job to handle
@@ -364,6 +408,9 @@ int qla4xxx_process_vendor_specific(struct bsg_job *bsg_job)
 	case QLISCSI_VND_UPDATE_NVRAM:
 		return qla4xxx_update_nvram(bsg_job);
 
+	case QLISCSI_VND_RESTORE_DEFAULTS:
+		return qla4xxx_restore_defaults(bsg_job);
+
 	default:
 		ql4_printk(KERN_ERR, ha, "%s: invalid BSG vendor command: "
 			   "0x%x\n", __func__, bsg_req->msgcode);

drivers/scsi/qla4xxx/ql4_bsg.h

@@ -13,5 +13,6 @@
 #define QLISCSI_VND_GET_ACB_STATE	3
 #define QLISCSI_VND_READ_NVRAM		4
 #define QLISCSI_VND_UPDATE_NVRAM	5
+#define QLISCSI_VND_RESTORE_DEFAULTS	6
 
 #endif

drivers/scsi/qla4xxx/ql4_glbl.h

@@ -166,6 +166,9 @@ int qla4xxx_get_nvram(struct scsi_qla_host *ha, dma_addr_t nvram_dma,
 		      uint32_t offset, uint32_t size);
 int qla4xxx_set_nvram(struct scsi_qla_host *ha, dma_addr_t nvram_dma,
 		      uint32_t offset, uint32_t size);
+int qla4xxx_restore_factory_defaults(struct scsi_qla_host *ha,
+				     uint32_t region, uint32_t field0,
+				     uint32_t field1);
 
 /* BSG Functions */
 int qla4xxx_bsg_request(struct bsg_job *bsg_job);

drivers/scsi/qla4xxx/ql4_mbx.c

@@ -1744,3 +1744,29 @@ int qla4xxx_set_nvram(struct scsi_qla_host *ha, dma_addr_t nvram_dma,
 	}
 	return status;
 }
+
+int qla4xxx_restore_factory_defaults(struct scsi_qla_host *ha,
+				     uint32_t region, uint32_t field0,
+				     uint32_t field1)
+{
+	int status = QLA_SUCCESS;
+	uint32_t mbox_cmd[MBOX_REG_COUNT];
+	uint32_t mbox_sts[MBOX_REG_COUNT];
+
+	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
+	memset(&mbox_sts, 0, sizeof(mbox_sts));
+
+	mbox_cmd[0] = MBOX_CMD_RESTORE_FACTORY_DEFAULTS;
+	mbox_cmd[3] = region;
+	mbox_cmd[4] = field0;
+	mbox_cmd[5] = field1;
+
+	status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 3, &mbox_cmd[0],
+					 &mbox_sts[0]);
+	if (status != QLA_SUCCESS) {
+		DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
+				  "status %04X\n", ha->host_no, __func__,
+				  mbox_sts[0]));
+	}
+	return status;
+}