1/* 2 * Copyright (c) 2008 Oracle. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 34#ifndef _LINUX_RDS_H 35#define _LINUX_RDS_H 36 37#include <linux/types.h> 38 39#define RDS_IB_ABI_VERSION 0x301 40 41/* 42 * setsockopt/getsockopt for SOL_RDS 43 */ 44#define RDS_CANCEL_SENT_TO 1 45#define RDS_GET_MR 2 46#define RDS_FREE_MR 3 47/* deprecated: RDS_BARRIER 4 */ 48#define RDS_RECVERR 5 49#define RDS_CONG_MONITOR 6 50#define RDS_GET_MR_FOR_DEST 7 51 52/* 53 * Control message types for SOL_RDS. 54 * 55 * CMSG_RDMA_ARGS (sendmsg) 56 * Request a RDMA transfer to/from the specified 57 * memory ranges. 58 * The cmsg_data is a struct rds_rdma_args. 59 * RDS_CMSG_RDMA_DEST (recvmsg, sendmsg) 60 * Kernel informs application about intended 61 * source/destination of a RDMA transfer 62 * RDS_CMSG_RDMA_MAP (sendmsg) 63 * Application asks kernel to map the given 64 * memory range into a IB MR, and send the 65 * R_Key along in an RDS extension header. 66 * The cmsg_data is a struct rds_get_mr_args, 67 * the same as for the GET_MR setsockopt. 68 * RDS_CMSG_RDMA_STATUS (recvmsg) 69 * Returns the status of a completed RDMA operation. 70 */ 71#define RDS_CMSG_RDMA_ARGS 1 72#define RDS_CMSG_RDMA_DEST 2 73#define RDS_CMSG_RDMA_MAP 3 74#define RDS_CMSG_RDMA_STATUS 4 75#define RDS_CMSG_CONG_UPDATE 5 76#define RDS_CMSG_ATOMIC_FADD 6 77#define RDS_CMSG_ATOMIC_CSWP 7 78#define RDS_CMSG_MASKED_ATOMIC_FADD 8 79#define RDS_CMSG_MASKED_ATOMIC_CSWP 9 80 81#define RDS_INFO_FIRST 10000 82#define RDS_INFO_COUNTERS 10000 83#define RDS_INFO_CONNECTIONS 10001 84/* 10002 aka RDS_INFO_FLOWS is deprecated */ 85#define RDS_INFO_SEND_MESSAGES 10003 86#define RDS_INFO_RETRANS_MESSAGES 10004 87#define RDS_INFO_RECV_MESSAGES 10005 88#define RDS_INFO_SOCKETS 10006 89#define RDS_INFO_TCP_SOCKETS 10007 90#define RDS_INFO_IB_CONNECTIONS 10008 91#define RDS_INFO_CONNECTION_STATS 10009 92#define RDS_INFO_IWARP_CONNECTIONS 10010 93#define RDS_INFO_LAST 10010 94 95struct rds_info_counter { 96 uint8_t name[32]; 97 uint64_t value; 98} __attribute__((packed)); 99 100#define RDS_INFO_CONNECTION_FLAG_SENDING 0x01 101#define RDS_INFO_CONNECTION_FLAG_CONNECTING 0x02 102#define RDS_INFO_CONNECTION_FLAG_CONNECTED 0x04 103 104#define TRANSNAMSIZ 16 105 106struct rds_info_connection { 107 uint64_t next_tx_seq; 108 uint64_t next_rx_seq; 109 __be32 laddr; 110 __be32 faddr; 111 uint8_t transport[TRANSNAMSIZ]; /* null term ascii */ 112 uint8_t flags; 113} __attribute__((packed)); 114 115#define RDS_INFO_MESSAGE_FLAG_ACK 0x01 116#define RDS_INFO_MESSAGE_FLAG_FAST_ACK 0x02 117 118struct rds_info_message { 119 uint64_t seq; 120 uint32_t len; 121 __be32 laddr; 122 __be32 faddr; 123 __be16 lport; 124 __be16 fport; 125 uint8_t flags; 126} __attribute__((packed)); 127 128struct rds_info_socket { 129 uint32_t sndbuf; 130 __be32 bound_addr; 131 __be32 connected_addr; 132 __be16 bound_port; 133 __be16 connected_port; 134 uint32_t rcvbuf; 135 uint64_t inum; 136} __attribute__((packed)); 137 138struct rds_info_tcp_socket { 139 __be32 local_addr; 140 __be16 local_port; 141 __be32 peer_addr; 142 __be16 peer_port; 143 uint64_t hdr_rem; 144 uint64_t data_rem; 145 uint32_t last_sent_nxt; 146 uint32_t last_expected_una; 147 uint32_t last_seen_una; 148} __attribute__((packed)); 149 150#define RDS_IB_GID_LEN 16 151struct rds_info_rdma_connection { 152 __be32 src_addr; 153 __be32 dst_addr; 154 uint8_t src_gid[RDS_IB_GID_LEN]; 155 uint8_t dst_gid[RDS_IB_GID_LEN]; 156 157 uint32_t max_send_wr; 158 uint32_t max_recv_wr; 159 uint32_t max_send_sge; 160 uint32_t rdma_mr_max; 161 uint32_t rdma_mr_size; 162}; 163 164/* 165 * Congestion monitoring. 166 * Congestion control in RDS happens at the host connection 167 * level by exchanging a bitmap marking congested ports. 168 * By default, a process sleeping in poll() is always woken 169 * up when the congestion map is updated. 170 * With explicit monitoring, an application can have more 171 * fine-grained control. 172 * The application installs a 64bit mask value in the socket, 173 * where each bit corresponds to a group of ports. 174 * When a congestion update arrives, RDS checks the set of 175 * ports that are now uncongested against the list bit mask 176 * installed in the socket, and if they overlap, we queue a 177 * cong_notification on the socket. 178 * 179 * To install the congestion monitor bitmask, use RDS_CONG_MONITOR 180 * with the 64bit mask. 181 * Congestion updates are received via RDS_CMSG_CONG_UPDATE 182 * control messages. 183 * 184 * The correspondence between bits and ports is 185 * 1 << (portnum % 64) 186 */ 187#define RDS_CONG_MONITOR_SIZE 64 188#define RDS_CONG_MONITOR_BIT(port) (((unsigned int) port) % RDS_CONG_MONITOR_SIZE) 189#define RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port)) 190 191/* 192 * RDMA related types 193 */ 194 195/* 196 * This encapsulates a remote memory location. 197 * In the current implementation, it contains the R_Key 198 * of the remote memory region, and the offset into it 199 * (so that the application does not have to worry about 200 * alignment). 201 */ 202typedef uint64_t rds_rdma_cookie_t; 203 204struct rds_iovec { 205 uint64_t addr; 206 uint64_t bytes; 207}; 208 209struct rds_get_mr_args { 210 struct rds_iovec vec; 211 uint64_t cookie_addr; 212 uint64_t flags; 213}; 214 215struct rds_get_mr_for_dest_args { 216 struct sockaddr_storage dest_addr; 217 struct rds_iovec vec; 218 uint64_t cookie_addr; 219 uint64_t flags; 220}; 221 222struct rds_free_mr_args { 223 rds_rdma_cookie_t cookie; 224 uint64_t flags; 225}; 226 227struct rds_rdma_args { 228 rds_rdma_cookie_t cookie; 229 struct rds_iovec remote_vec; 230 uint64_t local_vec_addr; 231 uint64_t nr_local; 232 uint64_t flags; 233 uint64_t user_token; 234}; 235 236struct rds_atomic_args { 237 rds_rdma_cookie_t cookie; 238 uint64_t local_addr; 239 uint64_t remote_addr; 240 union { 241 struct { 242 uint64_t compare; 243 uint64_t swap; 244 } cswp; 245 struct { 246 uint64_t add; 247 } fadd; 248 struct { 249 uint64_t compare; 250 uint64_t swap; 251 uint64_t compare_mask; 252 uint64_t swap_mask; 253 } m_cswp; 254 struct { 255 uint64_t add; 256 uint64_t nocarry_mask; 257 } m_fadd; 258 }; 259 uint64_t flags; 260 uint64_t user_token; 261}; 262 263struct rds_rdma_notify { 264 uint64_t user_token; 265 int32_t status; 266}; 267 268#define RDS_RDMA_SUCCESS 0 269#define RDS_RDMA_REMOTE_ERROR 1 270#define RDS_RDMA_CANCELED 2 271#define RDS_RDMA_DROPPED 3 272#define RDS_RDMA_OTHER_ERROR 4 273 274/* 275 * Common set of flags for all RDMA related structs 276 */ 277#define RDS_RDMA_READWRITE 0x0001 278#define RDS_RDMA_FENCE 0x0002 /* use FENCE for immediate send */ 279#define RDS_RDMA_INVALIDATE 0x0004 /* invalidate R_Key after freeing MR */ 280#define RDS_RDMA_USE_ONCE 0x0008 /* free MR after use */ 281#define RDS_RDMA_DONTWAIT 0x0010 /* Don't wait in SET_BARRIER */ 282#define RDS_RDMA_NOTIFY_ME 0x0020 /* Notify when operation completes */ 283#define RDS_RDMA_SILENT 0x0040 /* Do not interrupt remote */ 284 285#endif /* IB_RDS_H */ 286