diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_nvme.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nvme.h | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nvme.h b/drivers/scsi/lpfc/lpfc_nvme.h new file mode 100644 index 0000000000..733c277948 --- /dev/null +++ b/drivers/scsi/lpfc/lpfc_nvme.h @@ -0,0 +1,253 @@ +/******************************************************************* + * This file is part of the Emulex Linux Device Driver for * + * Fibre Channel Host Bus Adapters. * + * Copyright (C) 2017-2022 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_iocbq *rspwqe)); +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_iocbq *rspwqe)); +void __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba, + struct lpfc_iocbq *cmdwqe, struct lpfc_iocbq *rspwqe); |