[SCSI] qla4xxx: Add get ACB state support using BSG

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>

1 files changed, 60 insertions, 0 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_bsg.c b/drivers/scsi/qla4xxx/ql4_bsg.c
index 15032f130f22..de4db299bfcb 100644
--- a/drivers/scsi/qla4xxx/ql4_bsg.c
+++ b/drivers/scsi/qla4xxx/ql4_bsg.c
@@ -139,6 +139,63 @@ leave:
         return rval;
 }
 
+static int
+qla4xxx_get_acb_state(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 status[MBOX_REG_COUNT];
+        uint32_t acb_idx;
+        uint32_t ip_idx;
+        int rval = -EINVAL;
+
+        bsg_reply->reply_payload_rcv_len = 0;
+
+        if (unlikely(pci_channel_offline(ha->pdev)))
+                goto leave;
+
+        /* Only 4022 and above adapters are supported */
+        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;
+        }
+
+        if (bsg_job->reply_payload.payload_len < sizeof(status)) {
+                ql4_printk(KERN_ERR, ha, "%s: invalid payload len %d\n",
+                           __func__, bsg_job->reply_payload.payload_len);
+                rval = -EINVAL;
+                goto leave;
+        }
+
+        acb_idx = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
+        ip_idx = bsg_req->rqst_data.h_vendor.vendor_cmd[2];
+
+        rval = qla4xxx_get_ip_state(ha, acb_idx, ip_idx, status);
+        if (rval) {
+                ql4_printk(KERN_ERR, ha, "%s: get ip state failed\n",
+                           __func__);
+                bsg_reply->result = DID_ERROR << 16;
+                rval = -EIO;
+        } else {
+                bsg_reply->reply_payload_rcv_len =
+                        sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
+                                            bsg_job->reply_payload.sg_cnt,
+                                            status, sizeof(status));
+                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
@@ -157,6 +214,9 @@ int qla4xxx_process_vendor_specific(struct bsg_job *bsg_job)
         case QLISCSI_VND_UPDATE_FLASH:
                 return qla4xxx_update_flash(bsg_job);
 
+        case QLISCSI_VND_GET_ACB_STATE:
+                return qla4xxx_get_acb_state(bsg_job);
+
         default:
                 ql4_printk(KERN_ERR, ha, "%s: invalid BSG vendor command: "
                            "0x%x\n", __func__, bsg_req->msgcode);