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118 lines
3.5 KiB
118 lines
3.5 KiB
/* |
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* Copyright 2014 Cisco Systems, Inc. All rights reserved. |
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* |
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* This program is free software; you may redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; version 2 of the License. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#ifndef _SNIC_IO_H |
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#define _SNIC_IO_H |
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#define SNIC_DFLT_SG_DESC_CNT 32 /* Default descriptors for sgl */ |
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#define SNIC_MAX_SG_DESC_CNT 60 /* Max descriptor for sgl */ |
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#define SNIC_SG_DESC_ALIGN 16 /* Descriptor address alignment */ |
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/* SG descriptor for snic */ |
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struct snic_sg_desc { |
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__le64 addr; |
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__le32 len; |
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u32 _resvd; |
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}; |
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struct snic_dflt_sgl { |
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struct snic_sg_desc sg_desc[SNIC_DFLT_SG_DESC_CNT]; |
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}; |
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struct snic_max_sgl { |
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struct snic_sg_desc sg_desc[SNIC_MAX_SG_DESC_CNT]; |
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}; |
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enum snic_req_cache_type { |
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SNIC_REQ_CACHE_DFLT_SGL = 0, /* cache with default size sgl */ |
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SNIC_REQ_CACHE_MAX_SGL, /* cache with max size sgl */ |
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SNIC_REQ_TM_CACHE, /* cache for task mgmt reqs contains |
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snic_host_req objects only*/ |
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SNIC_REQ_MAX_CACHES /* number of sgl caches */ |
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}; |
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/* Per IO internal state */ |
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struct snic_internal_io_state { |
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char *rqi; |
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u64 flags; |
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u32 state; |
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u32 abts_status; /* Abort completion status */ |
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u32 lr_status; /* device reset completion status */ |
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}; |
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/* IO state machine */ |
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enum snic_ioreq_state { |
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SNIC_IOREQ_NOT_INITED = 0, |
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SNIC_IOREQ_PENDING, |
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SNIC_IOREQ_ABTS_PENDING, |
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SNIC_IOREQ_ABTS_COMPLETE, |
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SNIC_IOREQ_LR_PENDING, |
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SNIC_IOREQ_LR_COMPLETE, |
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SNIC_IOREQ_COMPLETE, |
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}; |
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struct snic; |
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struct snic_host_req; |
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/* |
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* snic_req_info : Contains info about IO, one per scsi command. |
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* Notes: Make sure that the structure is aligned to 16 B |
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* this helps in easy access to snic_req_info from snic_host_req |
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*/ |
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struct snic_req_info { |
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struct list_head list; |
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struct snic_host_req *req; |
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u64 start_time; /* start time in jiffies */ |
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u16 rq_pool_type; /* noticion of request pool type */ |
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u16 req_len; /* buf len passing to fw (req + sgl)*/ |
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u32 tgt_id; |
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u32 tm_tag; |
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u8 io_cmpl:1; /* sets to 1 when fw completes IO */ |
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u8 resvd[3]; |
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struct scsi_cmnd *sc; /* Associated scsi cmd */ |
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struct snic *snic; /* Associated snic */ |
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ulong sge_va; /* Pointer to Resp Buffer */ |
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u64 snsbuf_va; |
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struct snic_host_req *abort_req; |
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struct completion *abts_done; |
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struct snic_host_req *dr_req; |
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struct completion *dr_done; |
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}; |
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#define rqi_to_req(rqi) \ |
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((struct snic_host_req *) (((struct snic_req_info *)rqi)->req)) |
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#define req_to_rqi(req) \ |
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((struct snic_req_info *) (((struct snic_host_req *)req)->hdr.init_ctx)) |
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#define req_to_sgl(req) \ |
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((struct snic_sg_desc *) (((struct snic_host_req *)req)+1)) |
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struct snic_req_info * |
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snic_req_init(struct snic *, int sg_cnt); |
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void snic_req_free(struct snic *, struct snic_req_info *); |
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void snic_calc_io_process_time(struct snic *, struct snic_req_info *); |
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void snic_pci_unmap_rsp_buf(struct snic *, struct snic_req_info *); |
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struct snic_host_req * |
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snic_abort_req_init(struct snic *, struct snic_req_info *); |
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struct snic_host_req * |
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snic_dr_req_init(struct snic *, struct snic_req_info *); |
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#endif /* _SNIC_IO_H */
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