1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2015 Mellanox Technologies. All rights reserved. 4 */ 5 6 #ifndef _LINUX_NVME_RDMA_H 7 #define _LINUX_NVME_RDMA_H 8 9 #define NVME_RDMA_IP_PORT 4420 10 11 #define NVME_RDMA_MAX_QUEUE_SIZE 256 12 #define NVME_RDMA_MAX_METADATA_QUEUE_SIZE 128 13 #define NVME_RDMA_DEFAULT_QUEUE_SIZE 128 14 15 enum nvme_rdma_cm_fmt { 16 NVME_RDMA_CM_FMT_1_0 = 0x0, 17 }; 18 19 enum nvme_rdma_cm_status { 20 NVME_RDMA_CM_INVALID_LEN = 0x01, 21 NVME_RDMA_CM_INVALID_RECFMT = 0x02, 22 NVME_RDMA_CM_INVALID_QID = 0x03, 23 NVME_RDMA_CM_INVALID_HSQSIZE = 0x04, 24 NVME_RDMA_CM_INVALID_HRQSIZE = 0x05, 25 NVME_RDMA_CM_NO_RSC = 0x06, 26 NVME_RDMA_CM_INVALID_IRD = 0x07, 27 NVME_RDMA_CM_INVALID_ORD = 0x08, 28 NVME_RDMA_CM_INVALID_CNTLID = 0x09, 29 }; 30 31 static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status) 32 { 33 switch (status) { 34 case NVME_RDMA_CM_INVALID_LEN: 35 return "invalid length"; 36 case NVME_RDMA_CM_INVALID_RECFMT: 37 return "invalid record format"; 38 case NVME_RDMA_CM_INVALID_QID: 39 return "invalid queue ID"; 40 case NVME_RDMA_CM_INVALID_HSQSIZE: 41 return "invalid host SQ size"; 42 case NVME_RDMA_CM_INVALID_HRQSIZE: 43 return "invalid host RQ size"; 44 case NVME_RDMA_CM_NO_RSC: 45 return "resource not found"; 46 case NVME_RDMA_CM_INVALID_IRD: 47 return "invalid IRD"; 48 case NVME_RDMA_CM_INVALID_ORD: 49 return "Invalid ORD"; 50 case NVME_RDMA_CM_INVALID_CNTLID: 51 return "invalid controller ID"; 52 default: 53 return "unrecognized reason"; 54 } 55 } 56 57 /** 58 * struct nvme_rdma_cm_req - rdma connect request 59 * 60 * @recfmt: format of the RDMA Private Data 61 * @qid: queue Identifier for the Admin or I/O Queue 62 * @hrqsize: host receive queue size to be created 63 * @hsqsize: host send queue size to be created 64 */ 65 struct nvme_rdma_cm_req { 66 __le16 recfmt; 67 __le16 qid; 68 __le16 hrqsize; 69 __le16 hsqsize; 70 __le16 cntlid; 71 u8 rsvd[22]; 72 }; 73 74 /** 75 * struct nvme_rdma_cm_rep - rdma connect reply 76 * 77 * @recfmt: format of the RDMA Private Data 78 * @crqsize: controller receive queue size 79 */ 80 struct nvme_rdma_cm_rep { 81 __le16 recfmt; 82 __le16 crqsize; 83 u8 rsvd[28]; 84 }; 85 86 /** 87 * struct nvme_rdma_cm_rej - rdma connect reject 88 * 89 * @recfmt: format of the RDMA Private Data 90 * @sts: error status for the associated connect request 91 */ 92 struct nvme_rdma_cm_rej { 93 __le16 recfmt; 94 __le16 sts; 95 }; 96 97 #endif /* _LINUX_NVME_RDMA_H */ 98