[SCSI] be2iscsi: Get Initiator Name for the iSCSI_Host

Implement the ISCSI_HOST_PARAM_INITIATOR_NAME for .get_host_param

Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

4 files changed, 90 insertions, 0 deletions

diff --git a/drivers/scsi/be2iscsi/be_cmds.c b/drivers/scsi/be2iscsi/be_cmds.c
index cdb15364bc69..d2e9e933f7a3 100644
--- a/drivers/scsi/be2iscsi/be_cmds.c
+++ b/drivers/scsi/be2iscsi/be_cmds.c
@@ -15,6 +15,8 @@
  * Costa Mesa, CA 92626
  */
 
+#include <scsi/iscsi_proto.h>
+
 #include "be.h"
 #include "be_mgmt.h"
 #include "be_main.h"
diff --git a/drivers/scsi/be2iscsi/be_cmds.h b/drivers/scsi/be2iscsi/be_cmds.h
index c85d73cfc79c..f343ed6a9e54 100644
--- a/drivers/scsi/be2iscsi/be_cmds.h
+++ b/drivers/scsi/be2iscsi/be_cmds.h
@@ -513,6 +513,17 @@ struct be_cmd_resp_get_mac_addr {
         u32 rsvd[23];
 };
 
+#define BEISCSI_ALIAS_LEN 32
+
+struct be_cmd_hba_name {
+        struct be_cmd_req_hdr hdr;
+        u16 flags;
+        u16 rsvd0;
+        u8 initiator_name[ISCSI_NAME_LEN];
+        u8 initiator_alias[BEISCSI_ALIAS_LEN];
+} __packed;
+
+
 int beiscsi_cmd_eq_create(struct be_ctrl_info *ctrl,
                           struct be_queue_info *eq, int eq_delay);
 
@@ -531,6 +542,7 @@ int be_poll_mcc(struct be_ctrl_info *ctrl);
 int mgmt_check_supported_fw(struct be_ctrl_info *ctrl,
                                       struct beiscsi_hba *phba);
 unsigned int be_cmd_get_mac_addr(struct beiscsi_hba *phba);
+unsigned int be_cmd_get_initname(struct beiscsi_hba *phba);
 unsigned int beiscsi_get_boot_target(struct beiscsi_hba *phba);
 unsigned int beiscsi_get_session_info(struct beiscsi_hba *phba,
                                   u32 boot_session_handle,
diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c
index 2bb681ef19ef..1af777474e42 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.c
+++ b/drivers/scsi/be2iscsi/be_iscsi.c
@@ -279,6 +279,48 @@ int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 }
 
 /**
+ * beiscsi_get_initname - Read Initiator Name from flash
+ * @buf: buffer bointer
+ * @phba: The device priv structure instance
+ *
+ * returns number of bytes
+ */
+static int beiscsi_get_initname(char *buf, struct beiscsi_hba *phba)
+{
+        int rc;
+        unsigned int tag, wrb_num;
+        unsigned short status, extd_status;
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_hba_name *resp;
+        struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
+
+        tag = be_cmd_get_initname(phba);
+        if (!tag) {
+                SE_DEBUG(DBG_LVL_1, "Getting Initiator Name Failed\n");
+                return -EBUSY;
+        } else
+                wait_event_interruptible(phba->ctrl.mcc_wait[tag],
+                                phba->ctrl.mcc_numtag[tag]);
+
+        wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
+        extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
+        status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
+
+        if (status || extd_status) {
+                SE_DEBUG(DBG_LVL_1, "MailBox Command Failed with "
+                                "status = %d extd_status = %d\n",
+                                status, extd_status);
+                free_mcc_tag(&phba->ctrl, tag);
+                return -EAGAIN;
+        }
+        wrb = queue_get_wrb(mccq, wrb_num);
+        free_mcc_tag(&phba->ctrl, tag);
+        resp = embedded_payload(wrb);
+        rc = sprintf(buf, "%s\n", resp->initiator_name);
+        return rc;
+}
+
+/**
  * beiscsi_get_host_param - get the iscsi parameter
  * @shost: pointer to scsi_host structure
  * @param: parameter type identifier
@@ -301,6 +343,14 @@ int beiscsi_get_host_param(struct Scsi_Host *shost,
                         return status;
                 }
                 break;
+        case ISCSI_HOST_PARAM_INITIATOR_NAME:
+                status = beiscsi_get_initname(buf, phba);
+                if (status < 0) {
+                        SE_DEBUG(DBG_LVL_1,
+                                        "Retreiving Initiator Name Failed\n");
+                        return status;
+                }
+                break;
         default:
                 return iscsi_host_get_param(shost, param, buf);
         }
diff --git a/drivers/scsi/be2iscsi/be_mgmt.c b/drivers/scsi/be2iscsi/be_mgmt.c
index 44762cfa3e12..f7d27e9014c6 100644
--- a/drivers/scsi/be2iscsi/be_mgmt.c
+++ b/drivers/scsi/be2iscsi/be_mgmt.c
@@ -447,3 +447,29 @@ unsigned int be_cmd_get_mac_addr(struct beiscsi_hba *phba)
         return tag;
 }
 
+unsigned int be_cmd_get_initname(struct beiscsi_hba *phba)
+{
+        unsigned int tag = 0;
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_hba_name *req;
+        struct be_ctrl_info *ctrl = &phba->ctrl;
+
+        spin_lock(&ctrl->mbox_lock);
+        tag = alloc_mcc_tag(phba);
+        if (!tag) {
+                spin_unlock(&ctrl->mbox_lock);
+                return tag;
+        }
+
+        wrb = wrb_from_mccq(phba);
+        req = embedded_payload(wrb);
+        wrb->tag0 |= tag;
+        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
+        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
+                        OPCODE_ISCSI_INI_CFG_GET_HBA_NAME,
+                        sizeof(*req));
+
+        be_mcc_notify(phba);
+        spin_unlock(&ctrl->mbox_lock);
+        return tag;
+}