/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright ( c ) 2015 Mellanox Technologies . All rights reserved .
*/
#ifndef _LINUX_NVME_RDMA_H
#define _LINUX_NVME_RDMA_H
#define NVME_RDMA_IP_PORT 4420
#define NVME_RDMA_MAX_QUEUE_SIZE 256
#define NVME_RDMA_MAX_METADATA_QUEUE_SIZE 128
#define NVME_RDMA_DEFAULT_QUEUE_SIZE 128
enum nvme_rdma_cm_fmt {
NVME_RDMA_CM_FMT_1_0 = 0 x0,
};
enum nvme_rdma_cm_status {
NVME_RDMA_CM_INVALID_LEN = 0 x01,
NVME_RDMA_CM_INVALID_RECFMT = 0 x02,
NVME_RDMA_CM_INVALID_QID = 0 x03,
NVME_RDMA_CM_INVALID_HSQSIZE = 0 x04,
NVME_RDMA_CM_INVALID_HRQSIZE = 0 x05,
NVME_RDMA_CM_NO_RSC = 0 x06,
NVME_RDMA_CM_INVALID_IRD = 0 x07,
NVME_RDMA_CM_INVALID_ORD = 0 x08,
NVME_RDMA_CM_INVALID_CNTLID = 0 x09,
};
static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
{
switch (status) {
case NVME_RDMA_CM_INVALID_LEN:
return "invalid length" ;
case NVME_RDMA_CM_INVALID_RECFMT:
return "invalid record format" ;
case NVME_RDMA_CM_INVALID_QID:
return "invalid queue ID" ;
case NVME_RDMA_CM_INVALID_HSQSIZE:
return "invalid host SQ size" ;
case NVME_RDMA_CM_INVALID_HRQSIZE:
return "invalid host RQ size" ;
case NVME_RDMA_CM_NO_RSC:
return "resource not found" ;
case NVME_RDMA_CM_INVALID_IRD:
return "invalid IRD" ;
case NVME_RDMA_CM_INVALID_ORD:
return "Invalid ORD" ;
case NVME_RDMA_CM_INVALID_CNTLID:
return "invalid controller ID" ;
default :
return "unrecognized reason" ;
}
}
/**
* struct nvme_rdma_cm_req - rdma connect request
*
* @ recfmt : format of the RDMA Private Data
* @ qid : queue Identifier for the Admin or I / O Queue
* @ hrqsize : host receive queue size to be created
* @ hsqsize : host send queue size to be created
*/
struct nvme_rdma_cm_req {
__le16 recfmt;
__le16 qid;
__le16 hrqsize;
__le16 hsqsize;
__le16 cntlid;
u8 rsvd[22 ];
};
/**
* struct nvme_rdma_cm_rep - rdma connect reply
*
* @ recfmt : format of the RDMA Private Data
* @ crqsize : controller receive queue size
*/
struct nvme_rdma_cm_rep {
__le16 recfmt;
__le16 crqsize;
u8 rsvd[28 ];
};
/**
* struct nvme_rdma_cm_rej - rdma connect reject
*
* @ recfmt : format of the RDMA Private Data
* @ sts : error status for the associated connect request
*/
struct nvme_rdma_cm_rej {
__le16 recfmt;
__le16 sts;
};
#endif /* _LINUX_NVME_RDMA_H */
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