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ib_user_mad.h
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/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */ /* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Voltaire, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef IB_USER_MAD_H #define IB_USER_MAD_H #include <linux/types.h> #include <rdma/rdma_user_ioctl.h> /* * Increment this value if any changes that break userspace ABI * compatibility are made. */ #define IB_USER_MAD_ABI_VERSION 5 /* * Make sure that all structs defined in this file remain laid out so * that they pack the same way on 32-bit and 64-bit architectures (to * avoid incompatibility between 32-bit userspace and 64-bit kernels). */ /** * ib_user_mad_hdr_old - Old version of MAD packet header without pkey_index * @id - ID of agent MAD received with/to be sent with * @status - 0 on successful receive, ETIMEDOUT if no response * received (transaction ID in data[] will be set to TID of original * request) (ignored on send) * @timeout_ms - Milliseconds to wait for response (unset on receive) * @retries - Number of automatic retries to attempt * @qpn - Remote QP number received from/to be sent to * @qkey - Remote Q_Key to be sent with (unset on receive) * @lid - Remote lid received from/to be sent to * @sl - Service level received with/to be sent with * @path_bits - Local path bits received with/to be sent with * @grh_present - If set, GRH was received/should be sent * @gid_index - Local GID index to send with (unset on receive) * @hop_limit - Hop limit in GRH * @traffic_class - Traffic class in GRH * @gid - Remote GID in GRH * @flow_label - Flow label in GRH */ struct ib_user_mad_hdr_old { __u32 id; __u32 status; __u32 timeout_ms; __u32 retries; __u32 length; __be32 qpn; __be32 qkey; __be16 lid; __u8 sl; __u8 path_bits; __u8 grh_present; __u8 gid_index; __u8 hop_limit; __u8 traffic_class; __u8 gid[16]; __be32 flow_label; }; /** * ib_user_mad_hdr - MAD packet header * This layout allows specifying/receiving the P_Key index. To use * this capability, an application must call the * IB_USER_MAD_ENABLE_PKEY ioctl on the user MAD file handle before * any other actions with the file handle. * @id - ID of agent MAD received with/to be sent with * @status - 0 on successful receive, ETIMEDOUT if no response * received (transaction ID in data[] will be set to TID of original * request) (ignored on send) * @timeout_ms - Milliseconds to wait for response (unset on receive) * @retries - Number of automatic retries to attempt * @qpn - Remote QP number received from/to be sent to * @qkey - Remote Q_Key to be sent with (unset on receive) * @lid - Remote lid received from/to be sent to * @sl - Service level received with/to be sent with * @path_bits - Local path bits received with/to be sent with * @grh_present - If set, GRH was received/should be sent * @gid_index - Local GID index to send with (unset on receive) * @hop_limit - Hop limit in GRH * @traffic_class - Traffic class in GRH * @gid - Remote GID in GRH * @flow_label - Flow label in GRH * @pkey_index - P_Key index */ struct ib_user_mad_hdr { __u32 id; __u32 status; __u32 timeout_ms; __u32 retries; __u32 length; __be32 qpn; __be32 qkey; __be16 lid; __u8 sl; __u8 path_bits; __u8 grh_present; __u8 gid_index; __u8 hop_limit; __u8 traffic_class; __u8 gid[16]; __be32 flow_label; __u16 pkey_index; __u8 reserved[6]; }; /** * ib_user_mad - MAD packet * @hdr - MAD packet header * @data - Contents of MAD * */ struct ib_user_mad { struct ib_user_mad_hdr hdr; __aligned_u64 data[]; }; /* * Earlier versions of this interface definition declared the * method_mask[] member as an array of __u32 but treated it as a * bitmap made up of longs in the kernel. This ambiguity meant that * 32-bit big-endian applications that can run on both 32-bit and * 64-bit kernels had no consistent ABI to rely on, and 64-bit * big-endian applications that treated method_mask as being made up * of 32-bit words would have their bitmap misinterpreted. * * To clear up this confusion, we change the declaration of * method_mask[] to use unsigned long and handle the conversion from * 32-bit userspace to 64-bit kernel for big-endian systems in the * compat_ioctl method. Unfortunately, to keep the structure layout * the same, we need the method_mask[] array to be aligned only to 4 * bytes even when long is 64 bits, which forces us into this ugly * typedef. */ typedef unsigned long __attribute__((aligned(4))) packed_ulong; #define IB_USER_MAD_LONGS_PER_METHOD_MASK (128 / (8 * sizeof (long))) /** * ib_user_mad_reg_req - MAD registration request * @id - Set by the kernel; used to identify agent in future requests. * @qpn - Queue pair number; must be 0 or 1. * @method_mask - The caller will receive unsolicited MADs for any method * where @method_mask = 1. * @mgmt_class - Indicates which management class of MADs should be receive * by the caller. This field is only required if the user wishes to * receive unsolicited MADs, otherwise it should be 0. * @mgmt_class_version - Indicates which version of MADs for the given * management class to receive. * @oui: Indicates IEEE OUI when mgmt_class is a vendor class * in the range from 0x30 to 0x4f. Otherwise not used. * @rmpp_version: If set, indicates the RMPP version used. * */ struct ib_user_mad_reg_req { __u32 id; packed_ulong method_mask[IB_USER_MAD_LONGS_PER_METHOD_MASK]; __u8 qpn; __u8 mgmt_class; __u8 mgmt_class_version; __u8 oui[3]; __u8 rmpp_version; }; /** * ib_user_mad_reg_req2 - MAD registration request * * @id - Set by the _kernel_; used by userspace to identify the * registered agent in future requests. * @qpn - Queue pair number; must be 0 or 1. * @mgmt_class - Indicates which management class of MADs should be * receive by the caller. This field is only required if * the user wishes to receive unsolicited MADs, otherwise * it should be 0. * @mgmt_class_version - Indicates which version of MADs for the given * management class to receive. * @res - Ignored. * @flags - additional registration flags; Must be in the set of * flags defined in IB_USER_MAD_REG_FLAGS_CAP * @method_mask - The caller wishes to receive unsolicited MADs for the * methods whose bit(s) is(are) set. * @oui - Indicates IEEE OUI to use when mgmt_class is a vendor * class in the range from 0x30 to 0x4f. Otherwise not * used. * @rmpp_version - If set, indicates the RMPP version to use. */ enum { IB_USER_MAD_USER_RMPP = (1 << 0), }; #define IB_USER_MAD_REG_FLAGS_CAP (IB_USER_MAD_USER_RMPP) struct ib_user_mad_reg_req2 { __u32 id; __u32 qpn; __u8 mgmt_class; __u8 mgmt_class_version; __u16 res; __u32 flags; __aligned_u64 method_mask[2]; __u32 oui; __u8 rmpp_version; __u8 reserved[3]; }; #endif /* IB_USER_MAD_H */