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- /*
- * Copyright 2014 Cisco Systems, Inc. All rights reserved.
- *
- * 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.
- */
- #ifndef _SNIC_IO_H
- #define _SNIC_IO_H
- #define SNIC_DFLT_SG_DESC_CNT 32 /* Default descriptors for sgl */
- #define SNIC_MAX_SG_DESC_CNT 60 /* Max descriptor for sgl */
- #define SNIC_SG_DESC_ALIGN 16 /* Descriptor address alignment */
- /* SG descriptor for snic */
- struct snic_sg_desc {
- __le64 addr;
- __le32 len;
- u32 _resvd;
- };
- struct snic_dflt_sgl {
- struct snic_sg_desc sg_desc[SNIC_DFLT_SG_DESC_CNT];
- };
- struct snic_max_sgl {
- struct snic_sg_desc sg_desc[SNIC_MAX_SG_DESC_CNT];
- };
- enum snic_req_cache_type {
- SNIC_REQ_CACHE_DFLT_SGL = 0, /* cache with default size sgl */
- SNIC_REQ_CACHE_MAX_SGL, /* cache with max size sgl */
- SNIC_REQ_TM_CACHE, /* cache for task mgmt reqs contains
- snic_host_req objects only*/
- SNIC_REQ_MAX_CACHES /* number of sgl caches */
- };
- /* Per IO internal state */
- struct snic_internal_io_state {
- char *rqi;
- u64 flags;
- u32 state;
- u32 abts_status; /* Abort completion status */
- u32 lr_status; /* device reset completion status */
- };
- /* IO state machine */
- enum snic_ioreq_state {
- SNIC_IOREQ_NOT_INITED = 0,
- SNIC_IOREQ_PENDING,
- SNIC_IOREQ_ABTS_PENDING,
- SNIC_IOREQ_ABTS_COMPLETE,
- SNIC_IOREQ_LR_PENDING,
- SNIC_IOREQ_LR_COMPLETE,
- SNIC_IOREQ_COMPLETE,
- };
- struct snic;
- struct snic_host_req;
- /*
- * snic_req_info : Contains info about IO, one per scsi command.
- * Notes: Make sure that the structure is aligned to 16 B
- * this helps in easy access to snic_req_info from snic_host_req
- */
- struct snic_req_info {
- struct list_head list;
- struct snic_host_req *req;
- u64 start_time; /* start time in jiffies */
- u16 rq_pool_type; /* noticion of request pool type */
- u16 req_len; /* buf len passing to fw (req + sgl)*/
- u32 tgt_id;
- u32 tm_tag;
- u8 io_cmpl:1; /* sets to 1 when fw completes IO */
- u8 resvd[3];
- struct scsi_cmnd *sc; /* Associated scsi cmd */
- struct snic *snic; /* Associated snic */
- ulong sge_va; /* Pointer to Resp Buffer */
- u64 snsbuf_va;
- struct snic_host_req *abort_req;
- struct completion *abts_done;
- struct snic_host_req *dr_req;
- struct completion *dr_done;
- };
- #define rqi_to_req(rqi) \
- ((struct snic_host_req *) (((struct snic_req_info *)rqi)->req))
- #define req_to_rqi(req) \
- ((struct snic_req_info *) (((struct snic_host_req *)req)->hdr.init_ctx))
- #define req_to_sgl(req) \
- ((struct snic_sg_desc *) (((struct snic_host_req *)req)+1))
- struct snic_req_info *
- snic_req_init(struct snic *, int sg_cnt);
- void snic_req_free(struct snic *, struct snic_req_info *);
- void snic_calc_io_process_time(struct snic *, struct snic_req_info *);
- void snic_pci_unmap_rsp_buf(struct snic *, struct snic_req_info *);
- struct snic_host_req *
- snic_abort_req_init(struct snic *, struct snic_req_info *);
- struct snic_host_req *
- snic_dr_req_init(struct snic *, struct snic_req_info *);
- #endif /* _SNIC_IO_H */
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