/* SPDX-License-Identifier: GPL-2.0 */

  /*
   * Copyright (c) 2015 Mellanox Technologies. All rights reserved.

   */
  
  #ifndef _LINUX_NVME_RDMA_H
  #define _LINUX_NVME_RDMA_H
  
  enum nvme_rdma_cm_fmt {
  	NVME_RDMA_CM_FMT_1_0 = 0x0,
  };
  
  enum nvme_rdma_cm_status {
  	NVME_RDMA_CM_INVALID_LEN	= 0x01,
  	NVME_RDMA_CM_INVALID_RECFMT	= 0x02,
  	NVME_RDMA_CM_INVALID_QID	= 0x03,
  	NVME_RDMA_CM_INVALID_HSQSIZE	= 0x04,
  	NVME_RDMA_CM_INVALID_HRQSIZE	= 0x05,
  	NVME_RDMA_CM_NO_RSC		= 0x06,
  	NVME_RDMA_CM_INVALID_IRD	= 0x07,
  	NVME_RDMA_CM_INVALID_ORD	= 0x08,
  };

  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";
  	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;
  	u8		rsvd[24];
  };
  
  /**
   * 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 */