1 /* 2 * Copyright(c) 2017 Intel Corporation. 3 * 4 * This file is provided under a dual BSD/GPLv2 license. When using or 5 * redistributing this file, you may do so under either license. 6 * 7 * GPL LICENSE SUMMARY 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * BSD LICENSE 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 24 * - Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * - Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in 28 * the documentation and/or other materials provided with the 29 * distribution. 30 * - Neither the name of Intel Corporation nor the names of its 31 * contributors may be used to endorse or promote products derived 32 * from this software without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45 * 46 */ 47 48 #ifndef OPA_ADDR_H 49 #define OPA_ADDR_H 50 51 #include <rdma/opa_smi.h> 52 53 #define OPA_SPECIAL_OUI (0x00066AULL) 54 #define OPA_MAKE_ID(x) (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x))) 55 #define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \ 56 ? 0 : x) 57 #define OPA_GID_INDEX 0x1 58 /** 59 * 0xF8 - 4 bits of multicast range and 1 bit for collective range 60 * Example: For 24 bit LID space, 61 * Multicast range: 0xF00000 to 0xF7FFFF 62 * Collective range: 0xF80000 to 0xFFFFFE 63 */ 64 #define OPA_MCAST_NR 0x4 /* Number of top bits set */ 65 #define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */ 66 67 /** 68 * ib_is_opa_gid: Returns true if the top 24 bits of the gid 69 * contains the OPA_STL_OUI identifier. This identifies that 70 * the provided gid is a special purpose GID meant to carry 71 * extended LID information. 72 * 73 * @gid: The Global identifier 74 */ 75 static inline bool ib_is_opa_gid(const union ib_gid *gid) 76 { 77 return ((be64_to_cpu(gid->global.interface_id) >> 40) == 78 OPA_SPECIAL_OUI); 79 } 80 81 /** 82 * opa_get_lid_from_gid: Returns the last 32 bits of the gid. 83 * OPA devices use one of the gids in the gid table to also 84 * store the lid. 85 * 86 * @gid: The Global identifier 87 */ 88 static inline u32 opa_get_lid_from_gid(const union ib_gid *gid) 89 { 90 return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF; 91 } 92 93 /** 94 * opa_is_extended_lid: Returns true if dlid or slid are 95 * extended. 96 * 97 * @dlid: The DLID 98 * @slid: The SLID 99 */ 100 static inline bool opa_is_extended_lid(u32 dlid, u32 slid) 101 { 102 if ((be32_to_cpu(dlid) >= 103 be16_to_cpu(IB_MULTICAST_LID_BASE)) || 104 (be32_to_cpu(slid) >= 105 be16_to_cpu(IB_MULTICAST_LID_BASE))) 106 return true; 107 else 108 return false; 109 } 110 111 /* Get multicast lid base */ 112 static inline u32 opa_get_mcast_base(u32 nr_top_bits) 113 { 114 return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits)); 115 } 116 117 #endif /* OPA_ADDR_H */ 118