scsi: lpfc: NVME Target: Base modifications

NVME Target: Base modifications

This set of patches adds the base modifications for NVME target support

The base modifications consist of:
- Additional module parameters or configuration tuning
- Enablement of configuration mode for NVME target. Ties into the
  queueing model put into place by the initiator basemods patches.
- Target-specific buffer pools, dma pools, sgl pools

[mkp: fixed space at end of file]

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_nvmet.h b/drivers/scsi/lpfc/lpfc_nvmet.h
new file mode 100644
index 000000000000..f7b6a3f374a4
--- /dev/null
+++ b/drivers/scsi/lpfc/lpfc_nvmet.h
@@ -0,0 +1,101 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for         *
+ * Fibre Channel Host Bus Adapters.                                *
+ * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.emulex.com                                                  *
+ * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ ********************************************************************/
+
+#define LPFC_NVMET_MIN_SEGS		16
+#define LPFC_NVMET_DEFAULT_SEGS		64	/* 256K IOs */
+#define LPFC_NVMET_MAX_SEGS		510
+#define LPFC_NVMET_SUCCESS_LEN	12
+
+/* Used for NVME Target */
+struct lpfc_nvmet_tgtport {
+	struct lpfc_hba *phba;
+	struct completion tport_unreg_done;
+
+	/* Stats counters - lpfc_nvmet_unsol_ls_buffer */
+	atomic_t rcv_ls_req_in;
+	atomic_t rcv_ls_req_out;
+	atomic_t rcv_ls_req_drop;
+	atomic_t xmt_ls_abort;
+
+	/* Stats counters - lpfc_nvmet_xmt_ls_rsp */
+	atomic_t xmt_ls_rsp;
+	atomic_t xmt_ls_drop;
+
+	/* Stats counters - lpfc_nvmet_xmt_ls_rsp_cmp */
+	atomic_t xmt_ls_rsp_error;
+	atomic_t xmt_ls_rsp_cmpl;
+
+	/* Stats counters - lpfc_nvmet_unsol_fcp_buffer */
+	atomic_t rcv_fcp_cmd_in;
+	atomic_t rcv_fcp_cmd_out;
+	atomic_t rcv_fcp_cmd_drop;
+
+	/* Stats counters - lpfc_nvmet_xmt_fcp_op */
+	atomic_t xmt_fcp_abort;
+	atomic_t xmt_fcp_drop;
+	atomic_t xmt_fcp_read_rsp;
+	atomic_t xmt_fcp_read;
+	atomic_t xmt_fcp_write;
+	atomic_t xmt_fcp_rsp;
+
+	/* Stats counters - lpfc_nvmet_xmt_fcp_op_cmp */
+	atomic_t xmt_fcp_rsp_cmpl;
+	atomic_t xmt_fcp_rsp_error;
+	atomic_t xmt_fcp_rsp_drop;
+
+
+	/* Stats counters - lpfc_nvmet_unsol_issue_abort */
+	atomic_t xmt_abort_rsp;
+	atomic_t xmt_abort_rsp_error;
+
+	/* Stats counters - lpfc_nvmet_xmt_abort_cmp */
+	atomic_t xmt_abort_cmpl;
+};
+
+struct lpfc_nvmet_rcv_ctx {
+	union {
+		struct nvmefc_tgt_ls_req ls_req;
+		struct nvmefc_tgt_fcp_req fcp_req;
+	} ctx;
+	struct lpfc_hba *phba;
+	struct lpfc_iocbq *wqeq;
+	struct lpfc_iocbq *abort_wqeq;
+	dma_addr_t txrdy_phys;
+	uint32_t *txrdy;
+	uint32_t sid;
+	uint32_t offset;
+	uint16_t oxid;
+	uint16_t size;
+	uint16_t entry_cnt;
+	uint16_t cpu;
+	uint16_t state;
+	/* States */
+#define LPFC_NVMET_STE_FREE		0
+#define LPFC_NVMET_STE_RCV		1
+#define LPFC_NVMET_STE_DATA		2
+#define LPFC_NVMET_STE_ABORT		3
+#define LPFC_NVMET_STE_RSP		4
+#define LPFC_NVMET_STE_DONE		5
+	uint16_t flag;
+#define LPFC_NVMET_IO_INP		1
+#define LPFC_NVMET_ABORT_OP		2
+	struct rqb_dmabuf *rqb_buffer;
+};