[PATCH 31/51] qedf: use fc rport as argument for qedf_initiate_tmf()

[Hannes Reinecke <hare@suse.de>]

When sending a TMF we're only concerned with the rport and the LUN ID,
so use struct fc_rport as argument for qedf_initiate_tmf().

Signed-off-by: Hannes Reinecke <hare@suse.com>
Cc: Saurav Kashyap <skashyap@marvell.com>
---
 drivers/scsi/qedf/qedf.h      |  5 ++-
 drivers/scsi/qedf/qedf_io.c   | 80 ++++++++++-------------------------
 drivers/scsi/qedf/qedf_main.c | 17 ++++----
 3 files changed, 35 insertions(+), 67 deletions(-)

diff --git a/drivers/scsi/qedf/qedf.h b/drivers/scsi/qedf/qedf.h
index ba94413fe2ea..631ebb59a2ac 100644
--- a/drivers/scsi/qedf/qedf.h
+++ b/drivers/scsi/qedf/qedf.h
@@ -113,6 +113,7 @@ struct qedf_ioreq {
 #define QEDF_CMD_ERR_SCSI_DONE		0x5
 	u8 io_req_flags;
 	uint8_t tm_flags;
+	u64 tm_lun;
 	struct qedf_rport *fcport;
 #define	QEDF_CMD_ST_INACTIVE		0
 #define	QEDFC_CMD_ST_IO_ACTIVE		1
@@ -489,7 +490,7 @@ extern void qedf_process_warning_compl(struct qedf_ctx *qedf,
 	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
 extern void qedf_process_error_detect(struct qedf_ctx *qedf,
 	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
-extern void qedf_flush_active_ios(struct qedf_rport *fcport, int lun);
+extern void qedf_flush_active_ios(struct qedf_rport *fcport, u64 lun);
 extern void qedf_release_cmd(struct kref *ref);
 extern int qedf_initiate_abts(struct qedf_ioreq *io_req,
 	bool return_scsi_cmd_on_abts);
@@ -514,7 +515,7 @@ extern int qedf_initiate_cleanup(struct qedf_ioreq *io_req,
 	bool return_scsi_cmd_on_abts);
 extern void qedf_process_cleanup_compl(struct qedf_ctx *qedf,
 	struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
-extern int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags);
+extern int qedf_initiate_tmf(struct fc_rport *rport, u64 lun, u8 tm_flags);
 extern void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
 	struct qedf_ioreq *io_req);
 extern void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe);
diff --git a/drivers/scsi/qedf/qedf_io.c b/drivers/scsi/qedf/qedf_io.c
index 6b5b6a75ac88..f6883bf6461c 100644
--- a/drivers/scsi/qedf/qedf_io.c
+++ b/drivers/scsi/qedf/qedf_io.c
@@ -546,7 +546,7 @@ static int qedf_build_bd_list_from_sg(struct qedf_ioreq *io_req)
 }
 
 static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req,
-				  struct fcp_cmnd *fcp_cmnd)
+				struct fcp_cmnd *fcp_cmnd)
 {
 	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
 
@@ -554,8 +554,12 @@ static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req,
 	memset(fcp_cmnd, 0, FCP_CMND_LEN);
 
 	/* 8 bytes: SCSI LUN info */
-	int_to_scsilun(sc_cmd->device->lun,
-			(struct scsi_lun *)&fcp_cmnd->fc_lun);
+	if (io_req->cmd_type == QEDF_TASK_MGMT_CMD)
+		int_to_scsilun(io_req->tm_lun,
+			       (struct scsi_lun *)&fcp_cmnd->fc_lun);
+	else
+		int_to_scsilun(sc_cmd->device->lun,
+			       (struct scsi_lun *)&fcp_cmnd->fc_lun);
 
 	/* 4 bytes: flag info */
 	fcp_cmnd->fc_pri_ta = 0;
@@ -1065,8 +1069,9 @@ static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req,
 		io_req->fcp_resid = fcp_rsp->fcp_resid;
 
 	io_req->scsi_comp_flags = rsp_flags;
-	CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
-	    fcp_rsp->scsi_status_code;
+	if (sc_cmd)
+		CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
+			fcp_rsp->scsi_status_code;
 
 	if (rsp_flags &
 	    FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID)
@@ -1097,7 +1102,7 @@ static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req,
 	}
 
 	/* The sense buffer can be NULL for TMF commands */
-	if (sc_cmd->sense_buffer) {
+	if (sc_cmd && sc_cmd->sense_buffer) {
 		memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 		if (fcp_sns_len)
 			memcpy(sc_cmd->sense_buffer, sense_data,
@@ -1595,7 +1600,7 @@ static void qedf_flush_els_req(struct qedf_ctx *qedf,
 /* A value of -1 for lun is a wild card that means flush all
  * active SCSI I/Os for the target.
  */
-void qedf_flush_active_ios(struct qedf_rport *fcport, int lun)
+void qedf_flush_active_ios(struct qedf_rport *fcport, u64 lun)
 {
 	struct qedf_ioreq *io_req;
 	struct qedf_ctx *qedf;
@@ -1783,10 +1788,6 @@ void qedf_flush_active_ios(struct qedf_rport *fcport, int lun)
 			kref_put(&io_req->refcount, qedf_release_cmd);
 			continue;
 		}
-		if (lun > -1) {
-			if (io_req->lun != lun)
-				continue;
-		}
 
 		/*
 		 * Use kref_get_unless_zero in the unlikely case the command
@@ -2295,7 +2296,7 @@ void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
 	complete(&io_req->cleanup_done);
 }
 
-static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
+static int qedf_execute_tmf(struct qedf_rport *fcport, u64 tm_lun,
 	uint8_t tm_flags)
 {
 	struct qedf_ioreq *io_req;
@@ -2305,17 +2306,10 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
 	int rc = 0;
 	uint16_t xid;
 	int tmo = 0;
-	int lun = 0;
 	unsigned long flags;
 	struct fcoe_wqe *sqe;
 	u16 sqe_idx;
 
-	if (!sc_cmd) {
-		QEDF_ERR(&qedf->dbg_ctx, "sc_cmd is NULL\n");
-		return FAILED;
-	}
-
-	lun = (int)sc_cmd->device->lun;
 	if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
 		QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n");
 		rc = FAILED;
@@ -2335,7 +2329,7 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
 		qedf->target_resets++;
 
 	/* Initialize rest of io_req fields */
-	io_req->sc_cmd = sc_cmd;
+	io_req->sc_cmd = NULL;
 	io_req->fcport = fcport;
 	io_req->cmd_type = QEDF_TASK_MGMT_CMD;
 
@@ -2349,6 +2343,7 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
 
 	/* Default is to return a SCSI command when an error occurs */
 	io_req->return_scsi_cmd_on_abts = false;
+	io_req->tm_lun = tm_lun;
 
 	/* Obtain exchange id */
 	xid = io_req->xid;
@@ -2403,7 +2398,7 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
 
 
 	if (tm_flags == FCP_TMF_LUN_RESET)
-		qedf_flush_active_ios(fcport, lun);
+		qedf_flush_active_ios(fcport, tm_lun);
 	else
 		qedf_flush_active_ios(fcport, -1);
 
@@ -2418,23 +2413,18 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
 	return rc;
 }
 
-int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
+int qedf_initiate_tmf(struct fc_rport *rport, u64 lun, u8 tm_flags)
 {
-	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
 	struct fc_rport_libfc_priv *rp = rport->dd_data;
 	struct qedf_rport *fcport = (struct qedf_rport *)&rp[1];
-	struct qedf_ctx *qedf;
-	struct fc_lport *lport = shost_priv(sc_cmd->device->host);
+	struct qedf_ctx *qedf = fcport->qedf;
+	struct fc_lport *lport = rp->local_port;
 	int rc = SUCCESS;
-	int rval;
-	struct qedf_ioreq *io_req = NULL;
-	int ref_cnt = 0;
 	struct fc_rport_priv *rdata = fcport->rdata;
 
 	QEDF_ERR(NULL,
-		 "tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n",
-		 tm_flags, sc_cmd, sc_cmd->cmd_len ? sc_cmd->cmnd[0] : 0xff,
-		 rport->scsi_target_id, (int)sc_cmd->device->lun);
+		 "tm_flags 0x%x target_id = 0x%x lun=%llu\n",
+		 tm_flags, rport->scsi_target_id, lun);
 
 	if (!rdata || !kref_get_unless_zero(&rdata->kref)) {
 		QEDF_ERR(NULL, "stale rport\n");
@@ -2445,33 +2435,10 @@ int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
 		 (tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" :
 		 "LUN RESET");
 
-	if (sc_cmd->SCp.ptr) {
-		io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr;
-		ref_cnt = kref_read(&io_req->refcount);
-		QEDF_ERR(NULL,
-			 "orig io_req = %p xid = 0x%x ref_cnt = %d.\n",
-			 io_req, io_req->xid, ref_cnt);
-	}
-
-	rval = fc_remote_port_chkready(rport);
-	if (rval) {
-		QEDF_ERR(NULL, "device_reset rport not ready\n");
-		rc = FAILED;
-		goto tmf_err;
-	}
-
-	rc = fc_block_scsi_eh(sc_cmd);
+	rc = fc_block_rport(rport);
 	if (rc)
 		goto tmf_err;
 
-	if (!fcport) {
-		QEDF_ERR(NULL, "device_reset: rport is NULL\n");
-		rc = FAILED;
-		goto tmf_err;
-	}
-
-	qedf = fcport->qedf;
-
 	if (!qedf) {
 		QEDF_ERR(NULL, "qedf is NULL.\n");
 		rc = FAILED;
@@ -2508,7 +2475,7 @@ int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
 		goto tmf_err;
 	}
 
-	rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags);
+	rc = qedf_execute_tmf(fcport, lun, tm_flags);
 
 tmf_err:
 	kref_put(&rdata->kref, fc_rport_destroy);
@@ -2525,7 +2492,6 @@ void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
 	fcp_rsp = &cqe->cqe_info.rsp_info;
 	qedf_parse_fcp_rsp(io_req, fcp_rsp);
 
-	io_req->sc_cmd = NULL;
 	complete(&io_req->tm_done);
 }
 
diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c
index 38be2e2274a8..bc211d8101e1 100644
--- a/drivers/scsi/qedf/qedf_main.c
+++ b/drivers/scsi/qedf/qedf_main.c
@@ -857,18 +857,19 @@ static int qedf_eh_abort(struct scsi_cmnd *sc_cmd)
 
 static int qedf_eh_target_reset(struct scsi_cmnd *sc_cmd)
 {
-	QEDF_ERR(NULL, "%d:0:%d:%lld: TARGET RESET Issued...",
-		 sc_cmd->device->host->host_no, sc_cmd->device->id,
-		 sc_cmd->device->lun);
-	return qedf_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
+	struct scsi_target *starget = scsi_target(sc_cmd->device);
+	struct fc_rport *rport = starget_to_rport(starget);
+
+	QEDF_ERR(NULL, "TARGET RESET Issued...");
+	return qedf_initiate_tmf(rport, 0, FCP_TMF_TGT_RESET);
 }
 
 static int qedf_eh_device_reset(struct scsi_cmnd *sc_cmd)
 {
-	QEDF_ERR(NULL, "%d:0:%d:%lld: LUN RESET Issued... ",
-		 sc_cmd->device->host->host_no, sc_cmd->device->id,
-		 sc_cmd->device->lun);
-	return qedf_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
+	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
+
+	QEDF_ERR(NULL, "LUN RESET Issued...\n");
+	return qedf_initiate_tmf(rport, sc_cmd->device->lun, FCP_TMF_LUN_RESET);
 }
 
 bool qedf_wait_for_upload(struct qedf_ctx *qedf)
-- 
2.29.2