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/*******************************************************************
* 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);
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