2 * Copyright (c) 2008 Oracle. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
37 #include <linux/types.h>
38 #include <linux/socket.h> /* For __kernel_sockaddr_storage. */
40 #define RDS_IB_ABI_VERSION 0x301
45 * setsockopt/getsockopt for SOL_RDS
47 #define RDS_CANCEL_SENT_TO 1
50 /* deprecated: RDS_BARRIER 4 */
52 #define RDS_CONG_MONITOR 6
53 #define RDS_GET_MR_FOR_DEST 7
54 #define SO_RDS_TRANSPORT 8
56 /* supported values for SO_RDS_TRANSPORT */
57 #define RDS_TRANS_IB 0
58 #define RDS_TRANS_IWARP 1
59 #define RDS_TRANS_TCP 2
60 #define RDS_TRANS_COUNT 3
61 #define RDS_TRANS_NONE (~0)
64 * Control message types for SOL_RDS.
66 * CMSG_RDMA_ARGS (sendmsg)
67 * Request a RDMA transfer to/from the specified
69 * The cmsg_data is a struct rds_rdma_args.
70 * RDS_CMSG_RDMA_DEST (recvmsg, sendmsg)
71 * Kernel informs application about intended
72 * source/destination of a RDMA transfer
73 * RDS_CMSG_RDMA_MAP (sendmsg)
74 * Application asks kernel to map the given
75 * memory range into a IB MR, and send the
76 * R_Key along in an RDS extension header.
77 * The cmsg_data is a struct rds_get_mr_args,
78 * the same as for the GET_MR setsockopt.
79 * RDS_CMSG_RDMA_STATUS (recvmsg)
80 * Returns the status of a completed RDMA operation.
82 #define RDS_CMSG_RDMA_ARGS 1
83 #define RDS_CMSG_RDMA_DEST 2
84 #define RDS_CMSG_RDMA_MAP 3
85 #define RDS_CMSG_RDMA_STATUS 4
86 #define RDS_CMSG_CONG_UPDATE 5
87 #define RDS_CMSG_ATOMIC_FADD 6
88 #define RDS_CMSG_ATOMIC_CSWP 7
89 #define RDS_CMSG_MASKED_ATOMIC_FADD 8
90 #define RDS_CMSG_MASKED_ATOMIC_CSWP 9
92 #define RDS_INFO_FIRST 10000
93 #define RDS_INFO_COUNTERS 10000
94 #define RDS_INFO_CONNECTIONS 10001
95 /* 10002 aka RDS_INFO_FLOWS is deprecated */
96 #define RDS_INFO_SEND_MESSAGES 10003
97 #define RDS_INFO_RETRANS_MESSAGES 10004
98 #define RDS_INFO_RECV_MESSAGES 10005
99 #define RDS_INFO_SOCKETS 10006
100 #define RDS_INFO_TCP_SOCKETS 10007
101 #define RDS_INFO_IB_CONNECTIONS 10008
102 #define RDS_INFO_CONNECTION_STATS 10009
103 #define RDS_INFO_IWARP_CONNECTIONS 10010
104 #define RDS_INFO_LAST 10010
106 struct rds_info_counter {
109 } __attribute__((packed));
111 #define RDS_INFO_CONNECTION_FLAG_SENDING 0x01
112 #define RDS_INFO_CONNECTION_FLAG_CONNECTING 0x02
113 #define RDS_INFO_CONNECTION_FLAG_CONNECTED 0x04
115 #define TRANSNAMSIZ 16
117 struct rds_info_connection {
122 __u8 transport[TRANSNAMSIZ]; /* null term ascii */
124 } __attribute__((packed));
126 #define RDS_INFO_MESSAGE_FLAG_ACK 0x01
127 #define RDS_INFO_MESSAGE_FLAG_FAST_ACK 0x02
129 struct rds_info_message {
137 } __attribute__((packed));
139 struct rds_info_socket {
142 __be32 connected_addr;
144 __be16 connected_port;
147 } __attribute__((packed));
149 struct rds_info_tcp_socket {
157 __u32 last_expected_una;
159 } __attribute__((packed));
161 #define RDS_IB_GID_LEN 16
162 struct rds_info_rdma_connection {
165 __u8 src_gid[RDS_IB_GID_LEN];
166 __u8 dst_gid[RDS_IB_GID_LEN];
176 * Congestion monitoring.
177 * Congestion control in RDS happens at the host connection
178 * level by exchanging a bitmap marking congested ports.
179 * By default, a process sleeping in poll() is always woken
180 * up when the congestion map is updated.
181 * With explicit monitoring, an application can have more
182 * fine-grained control.
183 * The application installs a 64bit mask value in the socket,
184 * where each bit corresponds to a group of ports.
185 * When a congestion update arrives, RDS checks the set of
186 * ports that are now uncongested against the list bit mask
187 * installed in the socket, and if they overlap, we queue a
188 * cong_notification on the socket.
190 * To install the congestion monitor bitmask, use RDS_CONG_MONITOR
191 * with the 64bit mask.
192 * Congestion updates are received via RDS_CMSG_CONG_UPDATE
195 * The correspondence between bits and ports is
196 * 1 << (portnum % 64)
198 #define RDS_CONG_MONITOR_SIZE 64
199 #define RDS_CONG_MONITOR_BIT(port) (((unsigned int) port) % RDS_CONG_MONITOR_SIZE)
200 #define RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port))
207 * This encapsulates a remote memory location.
208 * In the current implementation, it contains the R_Key
209 * of the remote memory region, and the offset into it
210 * (so that the application does not have to worry about
213 typedef __u64 rds_rdma_cookie_t;
220 struct rds_get_mr_args {
221 struct rds_iovec vec;
226 struct rds_get_mr_for_dest_args {
227 struct __kernel_sockaddr_storage dest_addr;
228 struct rds_iovec vec;
233 struct rds_free_mr_args {
234 rds_rdma_cookie_t cookie;
238 struct rds_rdma_args {
239 rds_rdma_cookie_t cookie;
240 struct rds_iovec remote_vec;
241 __u64 local_vec_addr;
247 struct rds_atomic_args {
248 rds_rdma_cookie_t cookie;
274 struct rds_rdma_notify {
279 #define RDS_RDMA_SUCCESS 0
280 #define RDS_RDMA_REMOTE_ERROR 1
281 #define RDS_RDMA_CANCELED 2
282 #define RDS_RDMA_DROPPED 3
283 #define RDS_RDMA_OTHER_ERROR 4
286 * Common set of flags for all RDMA related structs
288 #define RDS_RDMA_READWRITE 0x0001
289 #define RDS_RDMA_FENCE 0x0002 /* use FENCE for immediate send */
290 #define RDS_RDMA_INVALIDATE 0x0004 /* invalidate R_Key after freeing MR */
291 #define RDS_RDMA_USE_ONCE 0x0008 /* free MR after use */
292 #define RDS_RDMA_DONTWAIT 0x0010 /* Don't wait in SET_BARRIER */
293 #define RDS_RDMA_NOTIFY_ME 0x0020 /* Notify when operation completes */
294 #define RDS_RDMA_SILENT 0x0040 /* Do not interrupt remote */
296 #endif /* IB_RDS_H */