mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 18:40:57 +07:00
c8806b6c9e
Cisco has developed a new PCI HBA interface called sNIC, which stands for SCSI NIC. This is a new storage feature supported on specialized network adapter. The new PCI function provides a uniform host interface and abstracts backend storage. [jejb: fix up checkpatch errors] Signed-off-by: Narsimhulu Musini <nmusini@cisco.com> Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
/*
|
|
* 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 */
|