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1/* SPDX-License-Identifier: GPL-2.0-only */2/* Copyright 2014 Cisco Systems, Inc. All rights reserved. */3 4#ifndef _SNIC_IO_H5#define _SNIC_IO_H6 7#define SNIC_DFLT_SG_DESC_CNT 32 /* Default descriptors for sgl */8#define SNIC_MAX_SG_DESC_CNT 60 /* Max descriptor for sgl */9#define SNIC_SG_DESC_ALIGN 16 /* Descriptor address alignment */10 11/* SG descriptor for snic */12struct snic_sg_desc {13 __le64 addr;14 __le32 len;15 u32 _resvd;16};17 18struct snic_dflt_sgl {19 struct snic_sg_desc sg_desc[SNIC_DFLT_SG_DESC_CNT];20};21 22struct snic_max_sgl {23 struct snic_sg_desc sg_desc[SNIC_MAX_SG_DESC_CNT];24};25 26enum snic_req_cache_type {27 SNIC_REQ_CACHE_DFLT_SGL = 0, /* cache with default size sgl */28 SNIC_REQ_CACHE_MAX_SGL, /* cache with max size sgl */29 SNIC_REQ_TM_CACHE, /* cache for task mgmt reqs contains30 snic_host_req objects only*/31 SNIC_REQ_MAX_CACHES /* number of sgl caches */32};33 34/* Per IO internal state */35struct snic_internal_io_state {36 char *rqi;37 u64 flags;38 u32 state;39 u32 abts_status; /* Abort completion status */40 u32 lr_status; /* device reset completion status */41};42 43/* IO state machine */44enum snic_ioreq_state {45 SNIC_IOREQ_NOT_INITED = 0,46 SNIC_IOREQ_PENDING,47 SNIC_IOREQ_ABTS_PENDING,48 SNIC_IOREQ_ABTS_COMPLETE,49 SNIC_IOREQ_LR_PENDING,50 SNIC_IOREQ_LR_COMPLETE,51 SNIC_IOREQ_COMPLETE,52};53 54struct snic;55struct snic_host_req;56 57/*58 * snic_req_info : Contains info about IO, one per scsi command.59 * Notes: Make sure that the structure is aligned to 16 B60 * this helps in easy access to snic_req_info from snic_host_req61 */62struct snic_req_info {63 struct list_head list;64 struct snic_host_req *req;65 u64 start_time; /* start time in jiffies */66 u16 rq_pool_type; /* noticion of request pool type */67 u16 req_len; /* buf len passing to fw (req + sgl)*/68 u32 tgt_id;69 70 u32 tm_tag;71 u8 io_cmpl:1; /* sets to 1 when fw completes IO */72 u8 resvd[3];73 struct scsi_cmnd *sc; /* Associated scsi cmd */74 struct snic *snic; /* Associated snic */75 ulong sge_va; /* Pointer to Resp Buffer */76 u64 snsbuf_va;77 78 struct snic_host_req *abort_req;79 struct completion *abts_done;80 81 struct snic_host_req *dr_req;82 struct completion *dr_done;83};84 85 86#define rqi_to_req(rqi) \87 ((struct snic_host_req *) (((struct snic_req_info *)rqi)->req))88 89#define req_to_rqi(req) \90 ((struct snic_req_info *) (((struct snic_host_req *)req)->hdr.init_ctx))91 92#define req_to_sgl(req) \93 ((struct snic_sg_desc *) (((struct snic_host_req *)req)+1))94 95struct snic_req_info *96snic_req_init(struct snic *, int sg_cnt);97void snic_req_free(struct snic *, struct snic_req_info *);98void snic_calc_io_process_time(struct snic *, struct snic_req_info *);99void snic_pci_unmap_rsp_buf(struct snic *, struct snic_req_info *);100struct snic_host_req *101snic_abort_req_init(struct snic *, struct snic_req_info *);102struct snic_host_req *103snic_dr_req_init(struct snic *, struct snic_req_info *);104#endif /* _SNIC_IO_H */105