1 /* 2 * Copyright (c) 2015 Mellanox Technologies. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 */ 13 14 #ifndef _LINUX_NVME_RDMA_H 15 #define _LINUX_NVME_RDMA_H 16 17 enum nvme_rdma_cm_fmt { 18 NVME_RDMA_CM_FMT_1_0 = 0x0, 19 }; 20 21 enum nvme_rdma_cm_status { 22 NVME_RDMA_CM_INVALID_LEN = 0x01, 23 NVME_RDMA_CM_INVALID_RECFMT = 0x02, 24 NVME_RDMA_CM_INVALID_QID = 0x03, 25 NVME_RDMA_CM_INVALID_HSQSIZE = 0x04, 26 NVME_RDMA_CM_INVALID_HRQSIZE = 0x05, 27 NVME_RDMA_CM_NO_RSC = 0x06, 28 NVME_RDMA_CM_INVALID_IRD = 0x07, 29 NVME_RDMA_CM_INVALID_ORD = 0x08, 30 }; 31 32 static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status) 33 { 34 switch (status) { 35 case NVME_RDMA_CM_INVALID_LEN: 36 return "invalid length"; 37 case NVME_RDMA_CM_INVALID_RECFMT: 38 return "invalid record format"; 39 case NVME_RDMA_CM_INVALID_QID: 40 return "invalid queue ID"; 41 case NVME_RDMA_CM_INVALID_HSQSIZE: 42 return "invalid host SQ size"; 43 case NVME_RDMA_CM_INVALID_HRQSIZE: 44 return "invalid host RQ size"; 45 case NVME_RDMA_CM_NO_RSC: 46 return "resource not found"; 47 case NVME_RDMA_CM_INVALID_IRD: 48 return "invalid IRD"; 49 case NVME_RDMA_CM_INVALID_ORD: 50 return "Invalid ORD"; 51 default: 52 return "unrecognized reason"; 53 } 54 } 55 56 /** 57 * struct nvme_rdma_cm_req - rdma connect request 58 * 59 * @recfmt: format of the RDMA Private Data 60 * @qid: queue Identifier for the Admin or I/O Queue 61 * @hrqsize: host receive queue size to be created 62 * @hsqsize: host send queue size to be created 63 */ 64 struct nvme_rdma_cm_req { 65 __le16 recfmt; 66 __le16 qid; 67 __le16 hrqsize; 68 __le16 hsqsize; 69 u8 rsvd[24]; 70 }; 71 72 /** 73 * struct nvme_rdma_cm_rep - rdma connect reply 74 * 75 * @recfmt: format of the RDMA Private Data 76 * @crqsize: controller receive queue size 77 */ 78 struct nvme_rdma_cm_rep { 79 __le16 recfmt; 80 __le16 crqsize; 81 u8 rsvd[28]; 82 }; 83 84 /** 85 * struct nvme_rdma_cm_rej - rdma connect reject 86 * 87 * @recfmt: format of the RDMA Private Data 88 * @fsts: error status for the associated connect request 89 */ 90 struct nvme_rdma_cm_rej { 91 __le16 recfmt; 92 __le16 sts; 93 }; 94 95 #endif /* _LINUX_NVME_RDMA_H */ 96