1/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */ 2/* 3 * Copyright (c) 2008, 2018 Oracle and/or its affiliates. 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 35#ifndef _LINUX_RDS_H 36#define _LINUX_RDS_H 37 38#include <linux/types.h> 39#include <linux/socket.h> /* For __kernel_sockaddr_storage. */ 40#include <linux/in6.h> /* For struct in6_addr. */ 41 42#define RDS_IB_ABI_VERSION 0x301 43 44#define SOL_RDS 276 45 46/* 47 * setsockopt/getsockopt for SOL_RDS 48 */ 49#define RDS_CANCEL_SENT_TO 1 50#define RDS_GET_MR 2 51#define RDS_FREE_MR 3 52/* deprecated: RDS_BARRIER 4 */ 53#define RDS_RECVERR 5 54#define RDS_CONG_MONITOR 6 55#define RDS_GET_MR_FOR_DEST 7 56#define SO_RDS_TRANSPORT 8 57 58/* Socket option to tap receive path latency 59 * SO_RDS: SO_RDS_MSG_RXPATH_LATENCY 60 * Format used struct rds_rx_trace_so 61 */ 62#define SO_RDS_MSG_RXPATH_LATENCY 10 63 64 65/* supported values for SO_RDS_TRANSPORT */ 66#define RDS_TRANS_IB 0 67#define RDS_TRANS_GAP 1 68#define RDS_TRANS_TCP 2 69#define RDS_TRANS_COUNT 3 70#define RDS_TRANS_NONE (~0) 71/* don't use RDS_TRANS_IWARP - it is deprecated */ 72#define RDS_TRANS_IWARP RDS_TRANS_GAP 73 74/* IOCTLS commands for SOL_RDS */ 75#define SIOCRDSSETTOS (SIOCPROTOPRIVATE) 76#define SIOCRDSGETTOS (SIOCPROTOPRIVATE + 1) 77 78typedef __u8 rds_tos_t; 79 80/* 81 * Control message types for SOL_RDS. 82 * 83 * CMSG_RDMA_ARGS (sendmsg) 84 * Request a RDMA transfer to/from the specified 85 * memory ranges. 86 * The cmsg_data is a struct rds_rdma_args. 87 * RDS_CMSG_RDMA_DEST (recvmsg, sendmsg) 88 * Kernel informs application about intended 89 * source/destination of a RDMA transfer 90 * RDS_CMSG_RDMA_MAP (sendmsg) 91 * Application asks kernel to map the given 92 * memory range into a IB MR, and send the 93 * R_Key along in an RDS extension header. 94 * The cmsg_data is a struct rds_get_mr_args, 95 * the same as for the GET_MR setsockopt. 96 * RDS_CMSG_RDMA_STATUS (recvmsg) 97 * Returns the status of a completed RDMA operation. 98 * RDS_CMSG_RXPATH_LATENCY(recvmsg) 99 * Returns rds message latencies in various stages of receive 100 * path in nS. Its set per socket using SO_RDS_MSG_RXPATH_LATENCY 101 * socket option. Legitimate points are defined in 102 * enum rds_message_rxpath_latency. More points can be added in 103 * future. CSMG format is struct rds_cmsg_rx_trace. 104 */ 105#define RDS_CMSG_RDMA_ARGS 1 106#define RDS_CMSG_RDMA_DEST 2 107#define RDS_CMSG_RDMA_MAP 3 108#define RDS_CMSG_RDMA_STATUS 4 109#define RDS_CMSG_CONG_UPDATE 5 110#define RDS_CMSG_ATOMIC_FADD 6 111#define RDS_CMSG_ATOMIC_CSWP 7 112#define RDS_CMSG_MASKED_ATOMIC_FADD 8 113#define RDS_CMSG_MASKED_ATOMIC_CSWP 9 114#define RDS_CMSG_RXPATH_LATENCY 11 115#define RDS_CMSG_ZCOPY_COOKIE 12 116#define RDS_CMSG_ZCOPY_COMPLETION 13 117 118#define RDS_INFO_FIRST 10000 119#define RDS_INFO_COUNTERS 10000 120#define RDS_INFO_CONNECTIONS 10001 121/* 10002 aka RDS_INFO_FLOWS is deprecated */ 122#define RDS_INFO_SEND_MESSAGES 10003 123#define RDS_INFO_RETRANS_MESSAGES 10004 124#define RDS_INFO_RECV_MESSAGES 10005 125#define RDS_INFO_SOCKETS 10006 126#define RDS_INFO_TCP_SOCKETS 10007 127#define RDS_INFO_IB_CONNECTIONS 10008 128#define RDS_INFO_CONNECTION_STATS 10009 129#define RDS_INFO_IWARP_CONNECTIONS 10010 130 131/* PF_RDS6 options */ 132#define RDS6_INFO_CONNECTIONS 10011 133#define RDS6_INFO_SEND_MESSAGES 10012 134#define RDS6_INFO_RETRANS_MESSAGES 10013 135#define RDS6_INFO_RECV_MESSAGES 10014 136#define RDS6_INFO_SOCKETS 10015 137#define RDS6_INFO_TCP_SOCKETS 10016 138#define RDS6_INFO_IB_CONNECTIONS 10017 139 140#define RDS_INFO_LAST 10017 141 142struct rds_info_counter { 143 __u8 name[32]; 144 __u64 value; 145} __attribute__((packed)); 146 147#define RDS_INFO_CONNECTION_FLAG_SENDING 0x01 148#define RDS_INFO_CONNECTION_FLAG_CONNECTING 0x02 149#define RDS_INFO_CONNECTION_FLAG_CONNECTED 0x04 150 151#define TRANSNAMSIZ 16 152 153struct rds_info_connection { 154 __u64 next_tx_seq; 155 __u64 next_rx_seq; 156 __be32 laddr; 157 __be32 faddr; 158 __u8 transport[TRANSNAMSIZ]; /* null term ascii */ 159 __u8 flags; 160 __u8 tos; 161} __attribute__((packed)); 162 163struct rds6_info_connection { 164 __u64 next_tx_seq; 165 __u64 next_rx_seq; 166 struct in6_addr laddr; 167 struct in6_addr faddr; 168 __u8 transport[TRANSNAMSIZ]; /* null term ascii */ 169 __u8 flags; 170} __attribute__((packed)); 171 172#define RDS_INFO_MESSAGE_FLAG_ACK 0x01 173#define RDS_INFO_MESSAGE_FLAG_FAST_ACK 0x02 174 175struct rds_info_message { 176 __u64 seq; 177 __u32 len; 178 __be32 laddr; 179 __be32 faddr; 180 __be16 lport; 181 __be16 fport; 182 __u8 flags; 183 __u8 tos; 184} __attribute__((packed)); 185 186struct rds6_info_message { 187 __u64 seq; 188 __u32 len; 189 struct in6_addr laddr; 190 struct in6_addr faddr; 191 __be16 lport; 192 __be16 fport; 193 __u8 flags; 194 __u8 tos; 195} __attribute__((packed)); 196 197struct rds_info_socket { 198 __u32 sndbuf; 199 __be32 bound_addr; 200 __be32 connected_addr; 201 __be16 bound_port; 202 __be16 connected_port; 203 __u32 rcvbuf; 204 __u64 inum; 205} __attribute__((packed)); 206 207struct rds6_info_socket { 208 __u32 sndbuf; 209 struct in6_addr bound_addr; 210 struct in6_addr connected_addr; 211 __be16 bound_port; 212 __be16 connected_port; 213 __u32 rcvbuf; 214 __u64 inum; 215} __attribute__((packed)); 216 217struct rds_info_tcp_socket { 218 __be32 local_addr; 219 __be16 local_port; 220 __be32 peer_addr; 221 __be16 peer_port; 222 __u64 hdr_rem; 223 __u64 data_rem; 224 __u32 last_sent_nxt; 225 __u32 last_expected_una; 226 __u32 last_seen_una; 227 __u8 tos; 228} __attribute__((packed)); 229 230struct rds6_info_tcp_socket { 231 struct in6_addr local_addr; 232 __be16 local_port; 233 struct in6_addr peer_addr; 234 __be16 peer_port; 235 __u64 hdr_rem; 236 __u64 data_rem; 237 __u32 last_sent_nxt; 238 __u32 last_expected_una; 239 __u32 last_seen_una; 240} __attribute__((packed)); 241 242#define RDS_IB_GID_LEN 16 243struct rds_info_rdma_connection { 244 __be32 src_addr; 245 __be32 dst_addr; 246 __u8 src_gid[RDS_IB_GID_LEN]; 247 __u8 dst_gid[RDS_IB_GID_LEN]; 248 249 __u32 max_send_wr; 250 __u32 max_recv_wr; 251 __u32 max_send_sge; 252 __u32 rdma_mr_max; 253 __u32 rdma_mr_size; 254 __u8 tos; 255 __u8 sl; 256 __u32 cache_allocs; 257}; 258 259struct rds6_info_rdma_connection { 260 struct in6_addr src_addr; 261 struct in6_addr dst_addr; 262 __u8 src_gid[RDS_IB_GID_LEN]; 263 __u8 dst_gid[RDS_IB_GID_LEN]; 264 265 __u32 max_send_wr; 266 __u32 max_recv_wr; 267 __u32 max_send_sge; 268 __u32 rdma_mr_max; 269 __u32 rdma_mr_size; 270 __u8 tos; 271 __u8 sl; 272 __u32 cache_allocs; 273}; 274 275/* RDS message Receive Path Latency points */ 276enum rds_message_rxpath_latency { 277 RDS_MSG_RX_HDR_TO_DGRAM_START = 0, 278 RDS_MSG_RX_DGRAM_REASSEMBLE, 279 RDS_MSG_RX_DGRAM_DELIVERED, 280 RDS_MSG_RX_DGRAM_TRACE_MAX 281}; 282 283struct rds_rx_trace_so { 284 __u8 rx_traces; 285 __u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX]; 286}; 287 288struct rds_cmsg_rx_trace { 289 __u8 rx_traces; 290 __u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX]; 291 __u64 rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX]; 292}; 293 294/* 295 * Congestion monitoring. 296 * Congestion control in RDS happens at the host connection 297 * level by exchanging a bitmap marking congested ports. 298 * By default, a process sleeping in poll() is always woken 299 * up when the congestion map is updated. 300 * With explicit monitoring, an application can have more 301 * fine-grained control. 302 * The application installs a 64bit mask value in the socket, 303 * where each bit corresponds to a group of ports. 304 * When a congestion update arrives, RDS checks the set of 305 * ports that are now uncongested against the list bit mask 306 * installed in the socket, and if they overlap, we queue a 307 * cong_notification on the socket. 308 * 309 * To install the congestion monitor bitmask, use RDS_CONG_MONITOR 310 * with the 64bit mask. 311 * Congestion updates are received via RDS_CMSG_CONG_UPDATE 312 * control messages. 313 * 314 * The correspondence between bits and ports is 315 * 1 << (portnum % 64) 316 */ 317#define RDS_CONG_MONITOR_SIZE 64 318#define RDS_CONG_MONITOR_BIT(port) (((unsigned int) port) % RDS_CONG_MONITOR_SIZE) 319#define RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port)) 320 321/* 322 * RDMA related types 323 */ 324 325/* 326 * This encapsulates a remote memory location. 327 * In the current implementation, it contains the R_Key 328 * of the remote memory region, and the offset into it 329 * (so that the application does not have to worry about 330 * alignment). 331 */ 332typedef __u64 rds_rdma_cookie_t; 333 334struct rds_iovec { 335 __u64 addr; 336 __u64 bytes; 337}; 338 339struct rds_get_mr_args { 340 struct rds_iovec vec; 341 __u64 cookie_addr; 342 __u64 flags; 343}; 344 345struct rds_get_mr_for_dest_args { 346 struct __kernel_sockaddr_storage dest_addr; 347 struct rds_iovec vec; 348 __u64 cookie_addr; 349 __u64 flags; 350}; 351 352struct rds_free_mr_args { 353 rds_rdma_cookie_t cookie; 354 __u64 flags; 355}; 356 357struct rds_rdma_args { 358 rds_rdma_cookie_t cookie; 359 struct rds_iovec remote_vec; 360 __u64 local_vec_addr; 361 __u64 nr_local; 362 __u64 flags; 363 __u64 user_token; 364}; 365 366struct rds_atomic_args { 367 rds_rdma_cookie_t cookie; 368 __u64 local_addr; 369 __u64 remote_addr; 370 union { 371 struct { 372 __u64 compare; 373 __u64 swap; 374 } cswp; 375 struct { 376 __u64 add; 377 } fadd; 378 struct { 379 __u64 compare; 380 __u64 swap; 381 __u64 compare_mask; 382 __u64 swap_mask; 383 } m_cswp; 384 struct { 385 __u64 add; 386 __u64 nocarry_mask; 387 } m_fadd; 388 }; 389 __u64 flags; 390 __u64 user_token; 391}; 392 393struct rds_rdma_notify { 394 __u64 user_token; 395 __s32 status; 396}; 397 398#define RDS_RDMA_SUCCESS 0 399#define RDS_RDMA_REMOTE_ERROR 1 400#define RDS_RDMA_CANCELED 2 401#define RDS_RDMA_DROPPED 3 402#define RDS_RDMA_OTHER_ERROR 4 403 404#define RDS_MAX_ZCOOKIES 8 405struct rds_zcopy_cookies { 406 __u32 num; 407 __u32 cookies[RDS_MAX_ZCOOKIES]; 408}; 409 410/* 411 * Common set of flags for all RDMA related structs 412 */ 413#define RDS_RDMA_READWRITE 0x0001 414#define RDS_RDMA_FENCE 0x0002 /* use FENCE for immediate send */ 415#define RDS_RDMA_INVALIDATE 0x0004 /* invalidate R_Key after freeing MR */ 416#define RDS_RDMA_USE_ONCE 0x0008 /* free MR after use */ 417#define RDS_RDMA_DONTWAIT 0x0010 /* Don't wait in SET_BARRIER */ 418#define RDS_RDMA_NOTIFY_ME 0x0020 /* Notify when operation completes */ 419#define RDS_RDMA_SILENT 0x0040 /* Do not interrupt remote */ 420 421#endif /* IB_RDS_H */ 422