[SCSI] be2iscsi: Issue MBX Cmd for login to boot target in crashdump mode

When the driver comes up in crashdump mode, it has to explicitly
issue command to FW for logging to the boot target. This fix issues
MBX Cmd to login to boot target in crashdump mode.

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

1 files changed, 133 insertions, 0 deletions

diff --git a/drivers/scsi/be2iscsi/be_mgmt.c b/drivers/scsi/be2iscsi/be_mgmt.c
index 2a096795b9aa..e294b0ae324f 100644
--- a/drivers/scsi/be2iscsi/be_mgmt.c
+++ b/drivers/scsi/be2iscsi/be_mgmt.c
@@ -23,6 +23,50 @@
 #include "be_mgmt.h"
 #include "be_iscsi.h"
 
+/**
+ * mgmt_reopen_session()- Reopen a session based on reopen_type
+ * @phba: Device priv structure instance
+ * @reopen_type: Type of reopen_session FW should do.
+ * @sess_handle: Session Handle of the session to be re-opened
+ *
+ * return
+ *	the TAG used for MBOX Command
+ *
+ **/
+unsigned int mgmt_reopen_session(struct beiscsi_hba *phba,
+				  unsigned int reopen_type,
+				  unsigned int sess_handle)
+{
+	struct be_ctrl_info *ctrl = &phba->ctrl;
+	struct be_mcc_wrb *wrb;
+	struct be_cmd_reopen_session_req *req;
+	unsigned int tag = 0;
+
+	SE_DEBUG(DBG_LVL_8, "In bescsi_get_boot_target\n");
+	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_DRIVER_REOPEN_ALL_SESSIONS,
+			   sizeof(struct be_cmd_reopen_session_resp));
+
+	/* set the reopen_type,sess_handle */
+	req->reopen_type = reopen_type;
+	req->session_handle = sess_handle;
+
+	be_mcc_notify(phba);
+	spin_unlock(&ctrl->mbox_lock);
+	return tag;
+}
+
 unsigned int mgmt_get_boot_target(struct beiscsi_hba *phba)
 {
 	struct be_ctrl_info *ctrl = &phba->ctrl;
@@ -924,3 +968,92 @@ unsigned int be_cmd_get_port_speed(struct beiscsi_hba *phba)
 	spin_unlock(&ctrl->mbox_lock);
 	return tag;
 }
+
+/**
+ * be_mgmt_get_boot_shandle()- Get the session handle
+ * @phba: device priv structure instance
+ * @s_handle: session handle returned for boot session.
+ *
+ * Get the boot target session handle. In case of
+ * crashdump mode driver has to issue and MBX Cmd
+ * for FW to login to boot target
+ *
+ * return
+ *	Success: 0
+ *	Failure: Non-Zero value
+ *
+ **/
+int be_mgmt_get_boot_shandle(struct beiscsi_hba *phba,
+			      unsigned int *s_handle)
+{
+	struct be_cmd_get_boot_target_resp *boot_resp;
+	struct be_mcc_wrb *wrb;
+	unsigned int tag, wrb_num;
+	uint8_t boot_retry = 3;
+	unsigned short status, extd_status;
+	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
+
+	do {
+		/* Get the Boot Target Session Handle and Count*/
+		tag = mgmt_get_boot_target(phba);
+		if (!tag) {
+			SE_DEBUG(DBG_LVL_1, "mgmt_get_boot_target Failed\n");
+			return -EAGAIN;
+		} 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, "mgmt_get_boot_target Failed"
+					    " status = %d extd_status = %d\n",
+					    status, extd_status);
+			free_mcc_tag(&phba->ctrl, tag);
+			return -EBUSY;
+		}
+		wrb = queue_get_wrb(mccq, wrb_num);
+		free_mcc_tag(&phba->ctrl, tag);
+		boot_resp = embedded_payload(wrb);
+
+		/* Check if the there are any Boot targets configured */
+		if (!boot_resp->boot_session_count) {
+			SE_DEBUG(DBG_LVL_8, "No boot targets configured\n");
+			return -ENXIO;
+		}
+
+		/* FW returns the session handle of the boot session */
+		if (boot_resp->boot_session_handle != INVALID_SESS_HANDLE) {
+			*s_handle = boot_resp->boot_session_handle;
+			return 0;
+		}
+
+		/* Issue MBX Cmd to FW to login to the boot target */
+		tag = mgmt_reopen_session(phba, BE_REOPEN_BOOT_SESSIONS,
+					  INVALID_SESS_HANDLE);
+		if (!tag) {
+			SE_DEBUG(DBG_LVL_1, "mgmt_reopen_session Failed\n");
+			return -EAGAIN;
+		} 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, "mgmt_reopen_session Failed"
+					    " status = %d extd_status = %d\n",
+					    status, extd_status);
+			free_mcc_tag(&phba->ctrl, tag);
+			return -EBUSY;
+		}
+		free_mcc_tag(&phba->ctrl, tag);
+
+	} while (--boot_retry);
+
+	/* Couldn't log into the boot target */
+	SE_DEBUG(DBG_LVL_1, "Login to Boot Target Failed\n");
+	return -ENXIO;
+}