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dfb99b050e
Based on the normalized pattern:
this program is free software you may redistribute it and/or modify it
under the terms of the gnu general public license as published by the
free software foundation version 2 of the license the software is
provided as is without warranty of any kind express or implied
including but not limited to the warranties of merchantability fitness
for a particular purpose and noninfringement in no event shall the
authors or copyright holders be liable for any claim damages or other
liability whether in an action of contract tort or otherwise arising
from out of or in connection with the software or the use or other
dealings in the software
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
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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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