drivers/scsi/lpfc/lpfc_nvme.h - linux - Git at Google

 /*******************************************************************
  * This file is part of the Emulex Linux Device Driver for         *
  * Fibre Channel Host Bus Adapters.                                *
  * Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.  *
  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
  * EMULEX and SLI are trademarks of Emulex.                        *
  * www.broadcom.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.                                     *
  ********************************************************************/

 #include <linux/nvme.h>
 #include <linux/nvme-fc-driver.h>
 #include <linux/nvme-fc.h>

 #define LPFC_NVME_DEFAULT_SEGS		(64 + 1)	/* 256K IOs */

 #define LPFC_NVME_ERSP_LEN		0x20

 #define LPFC_NVME_WAIT_TMO              10
 #define LPFC_NVME_EXPEDITE_XRICNT	8
 #define LPFC_NVME_FB_SHIFT		9
 #define LPFC_NVME_MAX_FB		(1 << 20)	/* 1M */

 #define lpfc_ndlp_get_nrport(ndlp)				\
 	((!ndlp->nrport || (ndlp->fc4_xpt_flags & NVME_XPT_UNREG_WAIT))\
 	? NULL : ndlp->nrport)

 struct lpfc_nvme_qhandle {
 	uint32_t index;		/* WQ index to use */
 	uint32_t qidx;		/* queue index passed to create */
 	uint32_t cpu_id;	/* current cpu id at time of create */
 };

 /* Declare nvme-based local and remote port definitions. */
 struct lpfc_nvme_lport {
 	struct lpfc_vport *vport;
 	struct completion *lport_unreg_cmp;
 	/* Add stats counters here */
 	atomic_t fc4NvmeLsRequests;
 	atomic_t fc4NvmeLsCmpls;
 	atomic_t xmt_fcp_noxri;
 	atomic_t xmt_fcp_bad_ndlp;
 	atomic_t xmt_fcp_qdepth;
 	atomic_t xmt_fcp_wqerr;
 	atomic_t xmt_fcp_err;
 	atomic_t xmt_fcp_abort;
 	atomic_t xmt_ls_abort;
 	atomic_t xmt_ls_err;
 	atomic_t cmpl_fcp_xb;
 	atomic_t cmpl_fcp_err;
 	atomic_t cmpl_ls_xb;
 	atomic_t cmpl_ls_err;
 };

 struct lpfc_nvme_rport {
 	struct lpfc_nvme_lport *lport;
 	struct nvme_fc_remote_port *remoteport;
 	struct lpfc_nodelist *ndlp;
 	struct completion rport_unreg_done;
 };

 struct lpfc_nvme_fcpreq_priv {
 	struct lpfc_io_buf *nvme_buf;
 };

 /*
  * set NVME LS request timeouts to 30s. It is larger than the 2*R_A_TOV
  * set by the spec, which appears to have issues with some devices.
  */
 #define LPFC_NVME_LS_TIMEOUT		30


 #define LPFC_NVMET_DEFAULT_SEGS		(64 + 1)	/* 256K IOs */
 #define LPFC_NVMET_RQE_MIN_POST		128
 #define LPFC_NVMET_RQE_DEF_POST		512
 #define LPFC_NVMET_RQE_DEF_COUNT	2048
 #define LPFC_NVMET_SUCCESS_LEN		12

 #define LPFC_NVMET_MRQ_AUTO		0
 #define LPFC_NVMET_MRQ_MAX		16

 #define LPFC_NVMET_WAIT_TMO		(5 * MSEC_PER_SEC)

 /* Used for NVME Target */
 #define LPFC_NVMET_INV_HOST_ACTIVE      1

 struct lpfc_nvmet_tgtport {
 	struct lpfc_hba *phba;
 	struct completion *tport_unreg_cmp;
 	atomic_t state;		/* tracks nvmet hosthandle invalidation */

 	/* 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;
 	atomic_t xmt_ls_abort_cmpl;

 	/* 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_aborted;
 	atomic_t xmt_ls_rsp_xb_set;
 	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;
 	atomic_t rcv_fcp_cmd_defer;
 	atomic_t xmt_fcp_release;

 	/* Stats counters - lpfc_nvmet_xmt_fcp_op */
 	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_xb_set;
 	atomic_t xmt_fcp_rsp_cmpl;
 	atomic_t xmt_fcp_rsp_error;
 	atomic_t xmt_fcp_rsp_aborted;
 	atomic_t xmt_fcp_rsp_drop;

 	/* Stats counters - lpfc_nvmet_xmt_fcp_abort */
 	atomic_t xmt_fcp_xri_abort_cqe;
 	atomic_t xmt_fcp_abort;
 	atomic_t xmt_fcp_abort_cmpl;
 	atomic_t xmt_abort_sol;
 	atomic_t xmt_abort_unsol;
 	atomic_t xmt_abort_rsp;
 	atomic_t xmt_abort_rsp_error;

 	/* Stats counters - defer IO */
 	atomic_t defer_ctx;
 	atomic_t defer_fod;
 	atomic_t defer_wqfull;
 };

 struct lpfc_nvmet_ctx_info {
 	struct list_head nvmet_ctx_list;
 	spinlock_t	nvmet_ctx_list_lock; /* lock per CPU */
 	struct lpfc_nvmet_ctx_info *nvmet_ctx_next_cpu;
 	struct lpfc_nvmet_ctx_info *nvmet_ctx_start_cpu;
 	uint16_t	nvmet_ctx_list_cnt;
 	char pad[16];  /* pad to a cache-line */
 };

 /* This retrieves the context info associated with the specified cpu / mrq */
 #define lpfc_get_ctx_list(phba, cpu, mrq)  \
 	(phba->sli4_hba.nvmet_ctx_info + ((cpu * phba->cfg_nvmet_mrq) + mrq))

 /* Values for state field of struct lpfc_async_xchg_ctx */
 #define LPFC_NVME_STE_LS_RCV		1
 #define LPFC_NVME_STE_LS_ABORT		2
 #define LPFC_NVME_STE_LS_RSP		3
 #define LPFC_NVME_STE_RCV		4
 #define LPFC_NVME_STE_DATA		5
 #define LPFC_NVME_STE_ABORT		6
 #define LPFC_NVME_STE_DONE		7
 #define LPFC_NVME_STE_FREE		0xff

 /* Values for flag field of struct lpfc_async_xchg_ctx */
 #define LPFC_NVME_IO_INP		0x1  /* IO is in progress on exchange */
 #define LPFC_NVME_ABORT_OP		0x2  /* Abort WQE issued on exchange */
 #define LPFC_NVME_XBUSY			0x4  /* XB bit set on IO cmpl */
 #define LPFC_NVME_CTX_RLS		0x8  /* ctx free requested */
 #define LPFC_NVME_ABTS_RCV		0x10  /* ABTS received on exchange */
 #define LPFC_NVME_CTX_REUSE_WQ		0x20  /* ctx reused via WQ */
 #define LPFC_NVME_DEFER_WQFULL		0x40  /* Waiting on a free WQE */
 #define LPFC_NVME_TNOTIFY		0x80  /* notify transport of abts */

 struct lpfc_async_xchg_ctx {
 	union {
 		struct nvmefc_tgt_fcp_req fcp_req;
 	} hdlrctx;
 	struct list_head list;
 	struct lpfc_hba *phba;
 	struct lpfc_nodelist *ndlp;
 	struct nvmefc_ls_req *ls_req;
 	struct nvmefc_ls_rsp ls_rsp;
 	struct lpfc_iocbq *wqeq;
 	struct lpfc_iocbq *abort_wqeq;
 	spinlock_t ctxlock; /* protect flag access */
 	uint32_t sid;
 	uint32_t offset;
 	uint16_t oxid;
 	uint16_t size;
 	uint16_t entry_cnt;
 	uint16_t cpu;
 	uint16_t idx;
 	uint16_t state;
 	uint16_t flag;
 	void *payload;
 	struct rqb_dmabuf *rqb_buffer;
 	struct lpfc_nvmet_ctxbuf *ctxbuf;
 	struct lpfc_sli4_hdw_queue *hdwq;

 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	uint64_t ts_isr_cmd;
 	uint64_t ts_cmd_nvme;
 	uint64_t ts_nvme_data;
 	uint64_t ts_data_wqput;
 	uint64_t ts_isr_data;
 	uint64_t ts_data_nvme;
 	uint64_t ts_nvme_status;
 	uint64_t ts_status_wqput;
 	uint64_t ts_isr_status;
 	uint64_t ts_status_nvme;
 #endif
 };


 /* routines found in lpfc_nvme.c */
 int __lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		struct nvmefc_ls_req *pnvme_lsreq,
 		void (*gen_req_cmp)(struct lpfc_hba *phba,
 				struct lpfc_iocbq *cmdwqe,
 				struct lpfc_wcqe_complete *wcqe));
 void __lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba,  struct lpfc_vport *vport,
 		struct lpfc_iocbq *cmdwqe, struct lpfc_wcqe_complete *wcqe);
 int __lpfc_nvme_ls_abort(struct lpfc_vport *vport,
 		struct lpfc_nodelist *ndlp, struct nvmefc_ls_req *pnvme_lsreq);

 /* routines found in lpfc_nvmet.c */
 int lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
 			struct lpfc_async_xchg_ctx *ctxp, uint32_t sid,
 			uint16_t xri);
 int __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
 			struct nvmefc_ls_rsp *ls_rsp,
 			void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
 				struct lpfc_iocbq *cmdwqe,
 				struct lpfc_wcqe_complete *wcqe));
 void __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba,
 		struct lpfc_iocbq *cmdwqe, struct lpfc_wcqe_complete *wcqe);
	/*******************************************************************
	* This file is part of the Emulex Linux Device Driver for *
	* Fibre Channel Host Bus Adapters. *
	* Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
	* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
	* Copyright (C) 2004-2016 Emulex. All rights reserved. *
	* EMULEX and SLI are trademarks of Emulex. *
	* www.broadcom.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. *
	********************************************************************/

	#include <linux/nvme.h>
	#include <linux/nvme-fc-driver.h>
	#include <linux/nvme-fc.h>

	#define LPFC_NVME_DEFAULT_SEGS (64 + 1) /* 256K IOs */

	#define LPFC_NVME_ERSP_LEN 0x20

	#define LPFC_NVME_WAIT_TMO 10
	#define LPFC_NVME_EXPEDITE_XRICNT 8
	#define LPFC_NVME_FB_SHIFT 9
	#define LPFC_NVME_MAX_FB (1 << 20) /* 1M */

	#define lpfc_ndlp_get_nrport(ndlp) \
	((!ndlp->nrport \|\| (ndlp->fc4_xpt_flags & NVME_XPT_UNREG_WAIT))\
	? NULL : ndlp->nrport)

	struct lpfc_nvme_qhandle {
	uint32_t index; /* WQ index to use */
	uint32_t qidx; /* queue index passed to create */
	uint32_t cpu_id; /* current cpu id at time of create */
	};

	/* Declare nvme-based local and remote port definitions. */
	struct lpfc_nvme_lport {
	struct lpfc_vport *vport;
	struct completion *lport_unreg_cmp;
	/* Add stats counters here */
	atomic_t fc4NvmeLsRequests;
	atomic_t fc4NvmeLsCmpls;
	atomic_t xmt_fcp_noxri;
	atomic_t xmt_fcp_bad_ndlp;
	atomic_t xmt_fcp_qdepth;
	atomic_t xmt_fcp_wqerr;
	atomic_t xmt_fcp_err;
	atomic_t xmt_fcp_abort;
	atomic_t xmt_ls_abort;
	atomic_t xmt_ls_err;
	atomic_t cmpl_fcp_xb;
	atomic_t cmpl_fcp_err;
	atomic_t cmpl_ls_xb;
	atomic_t cmpl_ls_err;
	};

	struct lpfc_nvme_rport {
	struct lpfc_nvme_lport *lport;
	struct nvme_fc_remote_port *remoteport;
	struct lpfc_nodelist *ndlp;
	struct completion rport_unreg_done;
	};

	struct lpfc_nvme_fcpreq_priv {
	struct lpfc_io_buf *nvme_buf;
	};

	/*
	* set NVME LS request timeouts to 30s. It is larger than the 2*R_A_TOV
	* set by the spec, which appears to have issues with some devices.
	*/
	#define LPFC_NVME_LS_TIMEOUT 30


	#define LPFC_NVMET_DEFAULT_SEGS (64 + 1) /* 256K IOs */
	#define LPFC_NVMET_RQE_MIN_POST 128
	#define LPFC_NVMET_RQE_DEF_POST 512
	#define LPFC_NVMET_RQE_DEF_COUNT 2048
	#define LPFC_NVMET_SUCCESS_LEN 12

	#define LPFC_NVMET_MRQ_AUTO 0
	#define LPFC_NVMET_MRQ_MAX 16

	#define LPFC_NVMET_WAIT_TMO (5 * MSEC_PER_SEC)

	/* Used for NVME Target */
	#define LPFC_NVMET_INV_HOST_ACTIVE 1

	struct lpfc_nvmet_tgtport {
	struct lpfc_hba *phba;
	struct completion *tport_unreg_cmp;
	atomic_t state; /* tracks nvmet hosthandle invalidation */

	/* 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;
	atomic_t xmt_ls_abort_cmpl;

	/* 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_aborted;
	atomic_t xmt_ls_rsp_xb_set;
	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;
	atomic_t rcv_fcp_cmd_defer;
	atomic_t xmt_fcp_release;

	/* Stats counters - lpfc_nvmet_xmt_fcp_op */
	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_xb_set;
	atomic_t xmt_fcp_rsp_cmpl;
	atomic_t xmt_fcp_rsp_error;
	atomic_t xmt_fcp_rsp_aborted;
	atomic_t xmt_fcp_rsp_drop;

	/* Stats counters - lpfc_nvmet_xmt_fcp_abort */
	atomic_t xmt_fcp_xri_abort_cqe;
	atomic_t xmt_fcp_abort;
	atomic_t xmt_fcp_abort_cmpl;
	atomic_t xmt_abort_sol;
	atomic_t xmt_abort_unsol;
	atomic_t xmt_abort_rsp;
	atomic_t xmt_abort_rsp_error;

	/* Stats counters - defer IO */
	atomic_t defer_ctx;
	atomic_t defer_fod;
	atomic_t defer_wqfull;
	};

	struct lpfc_nvmet_ctx_info {
	struct list_head nvmet_ctx_list;
	spinlock_t nvmet_ctx_list_lock; /* lock per CPU */
	struct lpfc_nvmet_ctx_info *nvmet_ctx_next_cpu;
	struct lpfc_nvmet_ctx_info *nvmet_ctx_start_cpu;
	uint16_t nvmet_ctx_list_cnt;
	char pad[16]; /* pad to a cache-line */
	};

	/* This retrieves the context info associated with the specified cpu / mrq */
	#define lpfc_get_ctx_list(phba, cpu, mrq) \
	(phba->sli4_hba.nvmet_ctx_info + ((cpu * phba->cfg_nvmet_mrq) + mrq))

	/* Values for state field of struct lpfc_async_xchg_ctx */
	#define LPFC_NVME_STE_LS_RCV 1
	#define LPFC_NVME_STE_LS_ABORT 2
	#define LPFC_NVME_STE_LS_RSP 3
	#define LPFC_NVME_STE_RCV 4
	#define LPFC_NVME_STE_DATA 5
	#define LPFC_NVME_STE_ABORT 6
	#define LPFC_NVME_STE_DONE 7
	#define LPFC_NVME_STE_FREE 0xff

	/* Values for flag field of struct lpfc_async_xchg_ctx */
	#define LPFC_NVME_IO_INP 0x1 /* IO is in progress on exchange */
	#define LPFC_NVME_ABORT_OP 0x2 /* Abort WQE issued on exchange */
	#define LPFC_NVME_XBUSY 0x4 /* XB bit set on IO cmpl */
	#define LPFC_NVME_CTX_RLS 0x8 /* ctx free requested */
	#define LPFC_NVME_ABTS_RCV 0x10 /* ABTS received on exchange */
	#define LPFC_NVME_CTX_REUSE_WQ 0x20 /* ctx reused via WQ */
	#define LPFC_NVME_DEFER_WQFULL 0x40 /* Waiting on a free WQE */
	#define LPFC_NVME_TNOTIFY 0x80 /* notify transport of abts */

	struct lpfc_async_xchg_ctx {
	union {
	struct nvmefc_tgt_fcp_req fcp_req;
	} hdlrctx;
	struct list_head list;
	struct lpfc_hba *phba;
	struct lpfc_nodelist *ndlp;
	struct nvmefc_ls_req *ls_req;
	struct nvmefc_ls_rsp ls_rsp;
	struct lpfc_iocbq *wqeq;
	struct lpfc_iocbq *abort_wqeq;
	spinlock_t ctxlock; /* protect flag access */
	uint32_t sid;
	uint32_t offset;
	uint16_t oxid;
	uint16_t size;
	uint16_t entry_cnt;
	uint16_t cpu;
	uint16_t idx;
	uint16_t state;
	uint16_t flag;
	void *payload;
	struct rqb_dmabuf *rqb_buffer;
	struct lpfc_nvmet_ctxbuf *ctxbuf;
	struct lpfc_sli4_hdw_queue *hdwq;

	#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	uint64_t ts_isr_cmd;
	uint64_t ts_cmd_nvme;
	uint64_t ts_nvme_data;
	uint64_t ts_data_wqput;
	uint64_t ts_isr_data;
	uint64_t ts_data_nvme;
	uint64_t ts_nvme_status;
	uint64_t ts_status_wqput;
	uint64_t ts_isr_status;
	uint64_t ts_status_nvme;
	#endif
	};


	/* routines found in lpfc_nvme.c */
	int __lpfc_nvme_ls_req(struct lpfc_vport vport, struct lpfc_nodelist ndlp,
	struct nvmefc_ls_req *pnvme_lsreq,
	void (gen_req_cmp)(struct lpfc_hba phba,
	struct lpfc_iocbq *cmdwqe,
	struct lpfc_wcqe_complete *wcqe));
	void __lpfc_nvme_ls_req_cmp(struct lpfc_hba phba, struct lpfc_vport vport,
	struct lpfc_iocbq cmdwqe, struct lpfc_wcqe_complete wcqe);
	int __lpfc_nvme_ls_abort(struct lpfc_vport *vport,
	struct lpfc_nodelist ndlp, struct nvmefc_ls_req pnvme_lsreq);

	/* routines found in lpfc_nvmet.c */
	int lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
	struct lpfc_async_xchg_ctx *ctxp, uint32_t sid,
	uint16_t xri);
	int __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
	struct nvmefc_ls_rsp *ls_rsp,
	void (xmt_ls_rsp_cmp)(struct lpfc_hba phba,
	struct lpfc_iocbq *cmdwqe,
	struct lpfc_wcqe_complete *wcqe));
	void __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba,
	struct lpfc_iocbq cmdwqe, struct lpfc_wcqe_complete wcqe);