1 /* 2 * Copyright (c) 2004 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #ifndef IB_USER_MAD_H 35 #define IB_USER_MAD_H 36 37 #include <linux/types.h> 38 #include <linux/ioctl.h> 39 40 /* 41 * Increment this value if any changes that break userspace ABI 42 * compatibility are made. 43 */ 44 #define IB_USER_MAD_ABI_VERSION 5 45 46 /* 47 * Make sure that all structs defined in this file remain laid out so 48 * that they pack the same way on 32-bit and 64-bit architectures (to 49 * avoid incompatibility between 32-bit userspace and 64-bit kernels). 50 */ 51 52 /** 53 * ib_user_mad_hdr_old - Old version of MAD packet header without pkey_index 54 * @id - ID of agent MAD received with/to be sent with 55 * @status - 0 on successful receive, ETIMEDOUT if no response 56 * received (transaction ID in data[] will be set to TID of original 57 * request) (ignored on send) 58 * @timeout_ms - Milliseconds to wait for response (unset on receive) 59 * @retries - Number of automatic retries to attempt 60 * @qpn - Remote QP number received from/to be sent to 61 * @qkey - Remote Q_Key to be sent with (unset on receive) 62 * @lid - Remote lid received from/to be sent to 63 * @sl - Service level received with/to be sent with 64 * @path_bits - Local path bits received with/to be sent with 65 * @grh_present - If set, GRH was received/should be sent 66 * @gid_index - Local GID index to send with (unset on receive) 67 * @hop_limit - Hop limit in GRH 68 * @traffic_class - Traffic class in GRH 69 * @gid - Remote GID in GRH 70 * @flow_label - Flow label in GRH 71 */ 72 struct ib_user_mad_hdr_old { 73 __u32 id; 74 __u32 status; 75 __u32 timeout_ms; 76 __u32 retries; 77 __u32 length; 78 __be32 qpn; 79 __be32 qkey; 80 __be16 lid; 81 __u8 sl; 82 __u8 path_bits; 83 __u8 grh_present; 84 __u8 gid_index; 85 __u8 hop_limit; 86 __u8 traffic_class; 87 __u8 gid[16]; 88 __be32 flow_label; 89 }; 90 91 /** 92 * ib_user_mad_hdr - MAD packet header 93 * This layout allows specifying/receiving the P_Key index. To use 94 * this capability, an application must call the 95 * IB_USER_MAD_ENABLE_PKEY ioctl on the user MAD file handle before 96 * any other actions with the file handle. 97 * @id - ID of agent MAD received with/to be sent with 98 * @status - 0 on successful receive, ETIMEDOUT if no response 99 * received (transaction ID in data[] will be set to TID of original 100 * request) (ignored on send) 101 * @timeout_ms - Milliseconds to wait for response (unset on receive) 102 * @retries - Number of automatic retries to attempt 103 * @qpn - Remote QP number received from/to be sent to 104 * @qkey - Remote Q_Key to be sent with (unset on receive) 105 * @lid - Remote lid received from/to be sent to 106 * @sl - Service level received with/to be sent with 107 * @path_bits - Local path bits received with/to be sent with 108 * @grh_present - If set, GRH was received/should be sent 109 * @gid_index - Local GID index to send with (unset on receive) 110 * @hop_limit - Hop limit in GRH 111 * @traffic_class - Traffic class in GRH 112 * @gid - Remote GID in GRH 113 * @flow_label - Flow label in GRH 114 * @pkey_index - P_Key index 115 */ 116 struct ib_user_mad_hdr { 117 __u32 id; 118 __u32 status; 119 __u32 timeout_ms; 120 __u32 retries; 121 __u32 length; 122 __be32 qpn; 123 __be32 qkey; 124 __be16 lid; 125 __u8 sl; 126 __u8 path_bits; 127 __u8 grh_present; 128 __u8 gid_index; 129 __u8 hop_limit; 130 __u8 traffic_class; 131 __u8 gid[16]; 132 __be32 flow_label; 133 __u16 pkey_index; 134 __u8 reserved[6]; 135 }; 136 137 /** 138 * ib_user_mad - MAD packet 139 * @hdr - MAD packet header 140 * @data - Contents of MAD 141 * 142 */ 143 struct ib_user_mad { 144 struct ib_user_mad_hdr hdr; 145 __u64 data[0]; 146 }; 147 148 /* 149 * Earlier versions of this interface definition declared the 150 * method_mask[] member as an array of __u32 but treated it as a 151 * bitmap made up of longs in the kernel. This ambiguity meant that 152 * 32-bit big-endian applications that can run on both 32-bit and 153 * 64-bit kernels had no consistent ABI to rely on, and 64-bit 154 * big-endian applications that treated method_mask as being made up 155 * of 32-bit words would have their bitmap misinterpreted. 156 * 157 * To clear up this confusion, we change the declaration of 158 * method_mask[] to use unsigned long and handle the conversion from 159 * 32-bit userspace to 64-bit kernel for big-endian systems in the 160 * compat_ioctl method. Unfortunately, to keep the structure layout 161 * the same, we need the method_mask[] array to be aligned only to 4 162 * bytes even when long is 64 bits, which forces us into this ugly 163 * typedef. 164 */ 165 typedef unsigned long __attribute__((aligned(4))) packed_ulong; 166 #define IB_USER_MAD_LONGS_PER_METHOD_MASK (128 / (8 * sizeof (long))) 167 168 /** 169 * ib_user_mad_reg_req - MAD registration request 170 * @id - Set by the kernel; used to identify agent in future requests. 171 * @qpn - Queue pair number; must be 0 or 1. 172 * @method_mask - The caller will receive unsolicited MADs for any method 173 * where @method_mask = 1. 174 * @mgmt_class - Indicates which management class of MADs should be receive 175 * by the caller. This field is only required if the user wishes to 176 * receive unsolicited MADs, otherwise it should be 0. 177 * @mgmt_class_version - Indicates which version of MADs for the given 178 * management class to receive. 179 * @oui: Indicates IEEE OUI when mgmt_class is a vendor class 180 * in the range from 0x30 to 0x4f. Otherwise not used. 181 * @rmpp_version: If set, indicates the RMPP version used. 182 * 183 */ 184 struct ib_user_mad_reg_req { 185 __u32 id; 186 packed_ulong method_mask[IB_USER_MAD_LONGS_PER_METHOD_MASK]; 187 __u8 qpn; 188 __u8 mgmt_class; 189 __u8 mgmt_class_version; 190 __u8 oui[3]; 191 __u8 rmpp_version; 192 }; 193 194 #define IB_IOCTL_MAGIC 0x1b 195 196 #define IB_USER_MAD_REGISTER_AGENT _IOWR(IB_IOCTL_MAGIC, 1, \ 197 struct ib_user_mad_reg_req) 198 199 #define IB_USER_MAD_UNREGISTER_AGENT _IOW(IB_IOCTL_MAGIC, 2, __u32) 200 201 #define IB_USER_MAD_ENABLE_PKEY _IO(IB_IOCTL_MAGIC, 3) 202 203 #endif /* IB_USER_MAD_H */ 204