xref: /titanic_52/usr/src/uts/common/sys/rds.h (revision 6a1af1a67532df169a657cce07140be64bdea084)
1 /*
2  * This file contains definitions used in OFED defined user/kernel
3  * interfaces. These are imported from the OFED header <linux/rds.h>. Oracle
4  * elects to have and use the contents of <linux/rds.h> under and governed
5  * by the OpenIB.org BSD license (see below for full license text). However,
6  * the following notice accompanied the original version of this file:
7  */
8 /*
9  * Copyright (c) 2008 Oracle.  All rights reserved.
10  *
11  * This software is available to you under a choice of one of two
12  * licenses.  You may choose to be licensed under the terms of the GNU
13  * General Public License (GPL) Version 2, available from the file
14  * COPYING in the main directory of this source tree, or the
15  * OpenIB.org BSD license below:
16  *
17  *     Redistribution and use in source and binary forms, with or
18  *     without modification, are permitted provided that the following
19  *     conditions are met:
20  *
21  *      - Redistributions of source code must retain the above
22  *        copyright notice, this list of conditions and the following
23  *        disclaimer.
24  *
25  *      - Redistributions in binary form must reproduce the above
26  *        copyright notice, this list of conditions and the following
27  *        disclaimer in the documentation and/or other materials
28  *        provided with the distribution.
29  *
30  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
31  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
32  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
33  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
34  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
35  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
36  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
37  * SOFTWARE.
38  *
39  */
40 #ifndef _SYS_RDS_H
41 #define	_SYS_RDS_H
42 
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46 
47 #if !(defined(__SVR4) && defined(__sun))
48 #include <linux/types.h>
49 #else
50 #include <sys/types.h>
51 #include <sys/socket.h>
52 #endif
53 
54 /*
55  * These sparse annotated types shouldn't be in any user
56  * visible header file. We should clean this up rather
57  * than kludging around them.
58  */
59 #if !(defined(__SVR4) && defined(__sun))
60 #ifndef __KERNEL__
61 #define	__be16	u_int16_t
62 #define	__be32	u_int32_t
63 #define	__be64	u_int64_t
64 #endif
65 #else
66 #define	u_int8_t	uint8_t
67 #define	u_int16_t	uint16_t
68 #define	u_int32_t	uint32_t
69 #define	u_int64_t	uint64_t
70 #endif
71 
72 #define	RDS_IB_ABI_VERSION		0x301
73 
74 #define	AF_RDS	AF_INET_OFFLOAD
75 #define	PF_RDS	AF_INET_OFFLOAD
76 #define	SOL_RDS	272
77 
78 /*
79  * setsockopt/getsockopt for SOL_RDS
80  */
81 #define	RDS_CANCEL_SENT_TO	1
82 #define	RDS_GET_MR			2
83 #define	RDS_FREE_MR			3
84 /* deprecated: RDS_BARRIER 4 */
85 #define	RDS_RECVERR			5
86 #define	RDS_CONG_MONITOR		6
87 #define	RDS_GET_MR_FOR_DEST		7
88 
89 
90 /*
91  * Control message types for SOL_RDS.
92  *
93  * CMSG_RDMA_ARGS (sendmsg)
94  *	Request a RDMA transfer to/from the specified
95  *	memory ranges.
96  *	The cmsg_data is a struct rds_rdma_args.
97  * RDS_CMSG_RDMA_DEST (recvmsg, sendmsg)
98  *	Kernel informs application about intended
99  *	source/destination of a RDMA transfer
100  * RDS_CMSG_RDMA_MAP (sendmsg)
101  *	Application asks kernel to map the given
102  *	memory range into a IB MR, and send the
103  *	R_Key along in an RDS extension header.
104  *	The cmsg_data is a struct rds_get_mr_args,
105  *	the same as for the GET_MR setsockopt.
106  * RDS_CMSG_RDMA_STATUS (recvmsg)
107  *	Returns the status of a completed RDMA operation.
108  */
109 #define	RDS_CMSG_RDMA_ARGS		1
110 #define	RDS_CMSG_RDMA_DEST		2
111 #define	RDS_CMSG_RDMA_MAP		3
112 #define	RDS_CMSG_RDMA_STATUS		4
113 #define	RDS_CMSG_CONG_UPDATE		5
114 
115 #define	RDS_INFO_FIRST			10000
116 #define	RDS_INFO_COUNTERS		10000
117 #define	RDS_INFO_CONNECTIONS		10001
118 /* 10002 aka RDS_INFO_FLOWS is deprecated */
119 #define	RDS_INFO_SEND_MESSAGES		10003
120 #define	RDS_INFO_RETRANS_MESSAGES	10004
121 #define	RDS_INFO_RECV_MESSAGES		10005
122 #define	RDS_INFO_SOCKETS		10006
123 #define	RDS_INFO_TCP_SOCKETS		10007
124 #define	RDS_INFO_IB_CONNECTIONS		10008
125 #define	RDS_INFO_CONNECTION_STATS	10009
126 #define	RDS_INFO_IWARP_CONNECTIONS	10010
127 #define	RDS_INFO_LAST			10010
128 
129 #if defined(__SVR4) && defined(__sun)
130 struct rds_info_arg {
131 	uint64_t	lenp;
132 	uint64_t	datap;
133 };
134 #endif
135 
136 #ifndef __lock_lint
137 #pragma pack(1)
138 struct rds_info_counter {
139 	u_int8_t	name[32];
140 	u_int64_t	value;
141 } __attribute__((packed));
142 #pragma pack()
143 #else
144 struct rds_info_counter {
145 	u_int8_t	name[32];
146 	u_int64_t	value;
147 };
148 #endif
149 
150 #define	RDS_INFO_CONNECTION_FLAG_SENDING	0x01
151 #define	RDS_INFO_CONNECTION_FLAG_CONNECTING	0x02
152 #define	RDS_INFO_CONNECTION_FLAG_CONNECTED	0x04
153 
154 #define	TRANSNAMSIZ	16
155 
156 #ifndef __lock_lint
157 #pragma pack(1)
158 struct rds_info_connection {
159 	u_int64_t	next_tx_seq;
160 	u_int64_t	next_rx_seq;
161 	u_int32_t	laddr;
162 	u_int32_t	faddr;
163 	u_int8_t	transport[TRANSNAMSIZ];		/* null term ascii */
164 	u_int8_t	flags;
165 } __attribute__((packed));
166 #pragma pack()
167 #else
168 struct rds_info_connection {
169 	u_int64_t	next_tx_seq;
170 	u_int64_t	next_rx_seq;
171 	u_int32_t	laddr;
172 	u_int32_t	faddr;
173 	u_int8_t	transport[TRANSNAMSIZ];		/* null term ascii */
174 	u_int8_t	flags;
175 };
176 #endif
177 
178 #ifndef __lock_lint
179 #pragma pack(1)
180 struct rds_info_flow {
181 	u_int32_t	laddr;
182 	u_int32_t	faddr;
183 	u_int32_t	bytes;
184 	u_int16_t	lport;
185 	u_int16_t	fport;
186 } __attribute__((packed));
187 #pragma pack()
188 #else
189 struct rds_info_flow {
190 	u_int32_t	laddr;
191 	u_int32_t	faddr;
192 	u_int32_t	bytes;
193 	u_int16_t	lport;
194 	u_int16_t	fport;
195 };
196 #endif
197 
198 #define	RDS_INFO_MESSAGE_FLAG_ACK		0x01
199 #define	RDS_INFO_MESSAGE_FLAG_FAST_ACK		0x02
200 
201 #ifndef __lock_lint
202 #pragma pack(1)
203 struct rds_info_message {
204 	u_int64_t	seq;
205 	u_int32_t	len;
206 	u_int32_t	laddr;
207 	u_int32_t	faddr;
208 	u_int16_t	lport;
209 	u_int16_t	fport;
210 	u_int8_t	flags;
211 } __attribute__((packed));
212 #pragma pack()
213 #else
214 struct rds_info_message {
215 	u_int64_t	seq;
216 	u_int32_t	len;
217 	u_int32_t	laddr;
218 	u_int32_t	faddr;
219 	u_int16_t	lport;
220 	u_int16_t	fport;
221 	u_int8_t	flags;
222 };
223 #endif
224 
225 #ifndef __lock_lint
226 #pragma pack(1)
227 struct rds_info_socket {
228 	u_int32_t	sndbuf;
229 	u_int32_t	bound_addr;
230 	u_int32_t	connected_addr;
231 	u_int16_t	bound_port;
232 	u_int16_t	connected_port;
233 	u_int32_t	rcvbuf;
234 	u_int64_t	inum;
235 } __attribute__((packed));
236 #pragma pack()
237 #else
238 struct rds_info_socket {
239 	u_int32_t	sndbuf;
240 	u_int32_t	bound_addr;
241 	u_int32_t	connected_addr;
242 	u_int16_t	bound_port;
243 	u_int16_t	connected_port;
244 	u_int32_t	rcvbuf;
245 	u_int64_t	inum;
246 };
247 #endif
248 
249 #ifndef __lock_lint
250 #pragma pack(1)
251 struct rds_info_tcp_socket {
252 	u_int32_t	local_addr;
253 	u_int16_t	local_port;
254 	u_int32_t	peer_addr;
255 	u_int16_t	peer_port;
256 	u_int64_t	hdr_rem;
257 	u_int64_t	data_rem;
258 	u_int32_t	last_sent_nxt;
259 	u_int32_t	last_expected_una;
260 	u_int32_t	last_seen_una;
261 } __attribute__((packed));
262 #pragma pack()
263 #else
264 struct rds_info_tcp_socket {
265 	u_int32_t	local_addr;
266 	u_int16_t	local_port;
267 	u_int32_t	peer_addr;
268 	u_int16_t	peer_port;
269 	u_int64_t	hdr_rem;
270 	u_int64_t	data_rem;
271 	u_int32_t	last_sent_nxt;
272 	u_int32_t	last_expected_una;
273 	u_int32_t	last_seen_una;
274 } __attribute__((packed));
275 };
276 #endif
277 
278 #define	RDS_IB_GID_LEN	16
279 struct rds_info_rdma_connection {
280 	u_int32_t	src_addr;
281 	u_int32_t	dst_addr;
282 	uint8_t		src_gid[RDS_IB_GID_LEN];
283 	uint8_t		dst_gid[RDS_IB_GID_LEN];
284 
285 	uint32_t	max_send_wr;
286 	uint32_t	max_recv_wr;
287 	uint32_t	max_send_sge;
288 	uint32_t	rdma_mr_max;
289 	uint32_t	rdma_mr_size;
290 };
291 
292 /*
293  * Congestion monitoring.
294  * Congestion control in RDS happens at the host connection
295  * level by exchanging a bitmap marking congested ports.
296  * By default, a process sleeping in poll() is always woken
297  * up when the congestion map is updated.
298  * With explicit monitoring, an application can have more
299  * fine-grained control.
300  * The application installs a 64bit mask value in the socket,
301  * where each bit corresponds to a group of ports.
302  * When a congestion update arrives, RDS checks the set of
303  * ports that are now uncongested against the list bit mask
304  * installed in the socket, and if they overlap, we queue a
305  * cong_notification on the socket.
306  *
307  * To install the congestion monitor bitmask, use RDS_CONG_MONITOR
308  * with the 64bit mask.
309  * Congestion updates are received via RDS_CMSG_CONG_UPDATE
310  * control messages.
311  *
312  * The correspondence between bits and ports is
313  *	1 << (portnum % 64)
314  */
315 #define	RDS_CONG_MONITOR_SIZE	64
316 #define	RDS_CONG_MONITOR_BIT(port)  \
317 	(((unsigned int) port) % RDS_CONG_MONITOR_SIZE)
318 #define	RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port))
319 
320 /*
321  * RDMA related types
322  */
323 
324 /*
325  * This encapsulates a remote memory location.
326  * In the current implementation, it contains the R_Key
327  * of the remote memory region, and the offset into it
328  * (so that the application does not have to worry about
329  * alignment).
330  */
331 typedef u_int64_t	rds_rdma_cookie_t;
332 
333 struct rds_iovec {
334 	u_int64_t	addr;
335 	u_int64_t	bytes;
336 };
337 
338 struct rds_get_mr_args {
339 	struct rds_iovec vec;
340 	u_int64_t	cookie_addr;
341 	uint64_t	flags;
342 };
343 
344 struct rds_get_mr_for_dest_args {
345 	struct sockaddr_storage dest_addr;
346 	struct rds_iovec	vec;
347 	u_int64_t		cookie_addr;
348 	uint64_t		flags;
349 };
350 
351 
352 struct rds_free_mr_args {
353 	rds_rdma_cookie_t cookie;
354 	u_int64_t	flags;
355 };
356 
357 struct rds_rdma_args {
358 	rds_rdma_cookie_t cookie;
359 	struct rds_iovec remote_vec;
360 	u_int64_t	local_vec_addr;
361 	u_int64_t	nr_local;
362 	u_int64_t	flags;
363 	u_int64_t	user_token;
364 };
365 
366 struct rds_rdma_notify {
367 	u_int64_t	user_token;
368 	int32_t		status;
369 };
370 
371 #define	RDS_RDMA_SUCCESS	0
372 #define	RDS_RDMA_REMOTE_ERROR	1
373 #define	RDS_RDMA_CANCELED	2
374 #define	RDS_RDMA_DROPPED	3
375 #define	RDS_RDMA_OTHER_ERROR	4
376 
377 /*
378  * Common set of flags for all RDMA related structs
379  */
380 #define	RDS_RDMA_READWRITE	0x0001
381 #define	RDS_RDMA_FENCE		0x0002	/* use FENCE for immediate send */
382 #define	RDS_RDMA_INVALIDATE	0x0004	/* invalidate R_Key after freeing MR */
383 #define	RDS_RDMA_USE_ONCE	0x0008	/* free MR after use */
384 #define	RDS_RDMA_DONTWAIT	0x0010	/* Don't wait in SET_BARRIER */
385 #define	RDS_RDMA_NOTIFY_ME	0x0020	/* Notify when operation completes */
386 
387 #ifdef	__cplusplus
388 }
389 #endif
390 
391 #endif /* _SYS_RDS_H */
392