1 /*
2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
4  * Copyright (c) 2006 Intel Corporation.  All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 
35 #ifndef IB_SA_H
36 #define IB_SA_H
37 
38 #include <linux/completion.h>
39 #include <linux/compiler.h>
40 
41 #include <linux/atomic.h>
42 
43 #include <rdma/ib_verbs.h>
44 #include <rdma/ib_mad.h>
45 
46 enum {
47 	IB_SA_CLASS_VERSION		= 2,	/* IB spec version 1.1/1.2 */
48 
49 	IB_SA_METHOD_GET_TABLE		= 0x12,
50 	IB_SA_METHOD_GET_TABLE_RESP	= 0x92,
51 	IB_SA_METHOD_DELETE		= 0x15,
52 	IB_SA_METHOD_DELETE_RESP	= 0x95,
53 	IB_SA_METHOD_GET_MULTI		= 0x14,
54 	IB_SA_METHOD_GET_MULTI_RESP	= 0x94,
55 	IB_SA_METHOD_GET_TRACE_TBL	= 0x13
56 };
57 
58 enum {
59 	IB_SA_ATTR_CLASS_PORTINFO    = 0x01,
60 	IB_SA_ATTR_NOTICE	     = 0x02,
61 	IB_SA_ATTR_INFORM_INFO	     = 0x03,
62 	IB_SA_ATTR_NODE_REC	     = 0x11,
63 	IB_SA_ATTR_PORT_INFO_REC     = 0x12,
64 	IB_SA_ATTR_SL2VL_REC	     = 0x13,
65 	IB_SA_ATTR_SWITCH_REC	     = 0x14,
66 	IB_SA_ATTR_LINEAR_FDB_REC    = 0x15,
67 	IB_SA_ATTR_RANDOM_FDB_REC    = 0x16,
68 	IB_SA_ATTR_MCAST_FDB_REC     = 0x17,
69 	IB_SA_ATTR_SM_INFO_REC	     = 0x18,
70 	IB_SA_ATTR_LINK_REC	     = 0x20,
71 	IB_SA_ATTR_GUID_INFO_REC     = 0x30,
72 	IB_SA_ATTR_SERVICE_REC	     = 0x31,
73 	IB_SA_ATTR_PARTITION_REC     = 0x33,
74 	IB_SA_ATTR_PATH_REC	     = 0x35,
75 	IB_SA_ATTR_VL_ARB_REC	     = 0x36,
76 	IB_SA_ATTR_MC_MEMBER_REC     = 0x38,
77 	IB_SA_ATTR_TRACE_REC	     = 0x39,
78 	IB_SA_ATTR_MULTI_PATH_REC    = 0x3a,
79 	IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b,
80 	IB_SA_ATTR_INFORM_INFO_REC   = 0xf3
81 };
82 
83 enum ib_sa_selector {
84 	IB_SA_GT   = 0,
85 	IB_SA_LT   = 1,
86 	IB_SA_EQ   = 2,
87 	/*
88 	 * The meaning of "best" depends on the attribute: for
89 	 * example, for MTU best will return the largest available
90 	 * MTU, while for packet life time, best will return the
91 	 * smallest available life time.
92 	 */
93 	IB_SA_BEST = 3
94 };
95 
96 /*
97  * Structures for SA records are named "struct ib_sa_xxx_rec."  No
98  * attempt is made to pack structures to match the physical layout of
99  * SA records in SA MADs; all packing and unpacking is handled by the
100  * SA query code.
101  *
102  * For a record with structure ib_sa_xxx_rec, the naming convention
103  * for the component mask value for field yyy is IB_SA_XXX_REC_YYY (we
104  * never use different abbreviations or otherwise change the spelling
105  * of xxx/yyy between ib_sa_xxx_rec.yyy and IB_SA_XXX_REC_YYY).
106  *
107  * Reserved rows are indicated with comments to help maintainability.
108  */
109 
110 #define IB_SA_PATH_REC_SERVICE_ID		       (IB_SA_COMP_MASK( 0) |\
111 							IB_SA_COMP_MASK( 1))
112 #define IB_SA_PATH_REC_DGID				IB_SA_COMP_MASK( 2)
113 #define IB_SA_PATH_REC_SGID				IB_SA_COMP_MASK( 3)
114 #define IB_SA_PATH_REC_DLID				IB_SA_COMP_MASK( 4)
115 #define IB_SA_PATH_REC_SLID				IB_SA_COMP_MASK( 5)
116 #define IB_SA_PATH_REC_RAW_TRAFFIC			IB_SA_COMP_MASK( 6)
117 /* reserved:								 7 */
118 #define IB_SA_PATH_REC_FLOW_LABEL       		IB_SA_COMP_MASK( 8)
119 #define IB_SA_PATH_REC_HOP_LIMIT			IB_SA_COMP_MASK( 9)
120 #define IB_SA_PATH_REC_TRAFFIC_CLASS			IB_SA_COMP_MASK(10)
121 #define IB_SA_PATH_REC_REVERSIBLE			IB_SA_COMP_MASK(11)
122 #define IB_SA_PATH_REC_NUMB_PATH			IB_SA_COMP_MASK(12)
123 #define IB_SA_PATH_REC_PKEY				IB_SA_COMP_MASK(13)
124 #define IB_SA_PATH_REC_QOS_CLASS			IB_SA_COMP_MASK(14)
125 #define IB_SA_PATH_REC_SL				IB_SA_COMP_MASK(15)
126 #define IB_SA_PATH_REC_MTU_SELECTOR			IB_SA_COMP_MASK(16)
127 #define IB_SA_PATH_REC_MTU				IB_SA_COMP_MASK(17)
128 #define IB_SA_PATH_REC_RATE_SELECTOR			IB_SA_COMP_MASK(18)
129 #define IB_SA_PATH_REC_RATE				IB_SA_COMP_MASK(19)
130 #define IB_SA_PATH_REC_PACKET_LIFE_TIME_SELECTOR	IB_SA_COMP_MASK(20)
131 #define IB_SA_PATH_REC_PACKET_LIFE_TIME			IB_SA_COMP_MASK(21)
132 #define IB_SA_PATH_REC_PREFERENCE			IB_SA_COMP_MASK(22)
133 
134 struct ib_sa_path_rec {
135 	__be64       service_id;
136 	union ib_gid dgid;
137 	union ib_gid sgid;
138 	__be16       dlid;
139 	__be16       slid;
140 	int          raw_traffic;
141 	/* reserved */
142 	__be32       flow_label;
143 	u8           hop_limit;
144 	u8           traffic_class;
145 	int          reversible;
146 	u8           numb_path;
147 	__be16       pkey;
148 	__be16       qos_class;
149 	u8           sl;
150 	u8           mtu_selector;
151 	u8           mtu;
152 	u8           rate_selector;
153 	u8           rate;
154 	u8           packet_life_time_selector;
155 	u8           packet_life_time;
156 	u8           preference;
157 };
158 
159 #define IB_SA_MCMEMBER_REC_MGID				IB_SA_COMP_MASK( 0)
160 #define IB_SA_MCMEMBER_REC_PORT_GID			IB_SA_COMP_MASK( 1)
161 #define IB_SA_MCMEMBER_REC_QKEY				IB_SA_COMP_MASK( 2)
162 #define IB_SA_MCMEMBER_REC_MLID				IB_SA_COMP_MASK( 3)
163 #define IB_SA_MCMEMBER_REC_MTU_SELECTOR			IB_SA_COMP_MASK( 4)
164 #define IB_SA_MCMEMBER_REC_MTU				IB_SA_COMP_MASK( 5)
165 #define IB_SA_MCMEMBER_REC_TRAFFIC_CLASS		IB_SA_COMP_MASK( 6)
166 #define IB_SA_MCMEMBER_REC_PKEY				IB_SA_COMP_MASK( 7)
167 #define IB_SA_MCMEMBER_REC_RATE_SELECTOR		IB_SA_COMP_MASK( 8)
168 #define IB_SA_MCMEMBER_REC_RATE				IB_SA_COMP_MASK( 9)
169 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR	IB_SA_COMP_MASK(10)
170 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME		IB_SA_COMP_MASK(11)
171 #define IB_SA_MCMEMBER_REC_SL				IB_SA_COMP_MASK(12)
172 #define IB_SA_MCMEMBER_REC_FLOW_LABEL			IB_SA_COMP_MASK(13)
173 #define IB_SA_MCMEMBER_REC_HOP_LIMIT			IB_SA_COMP_MASK(14)
174 #define IB_SA_MCMEMBER_REC_SCOPE			IB_SA_COMP_MASK(15)
175 #define IB_SA_MCMEMBER_REC_JOIN_STATE			IB_SA_COMP_MASK(16)
176 #define IB_SA_MCMEMBER_REC_PROXY_JOIN			IB_SA_COMP_MASK(17)
177 
178 struct ib_sa_mcmember_rec {
179 	union ib_gid mgid;
180 	union ib_gid port_gid;
181 	__be32       qkey;
182 	__be16       mlid;
183 	u8           mtu_selector;
184 	u8           mtu;
185 	u8           traffic_class;
186 	__be16       pkey;
187 	u8 	     rate_selector;
188 	u8 	     rate;
189 	u8 	     packet_life_time_selector;
190 	u8 	     packet_life_time;
191 	u8           sl;
192 	__be32       flow_label;
193 	u8           hop_limit;
194 	u8           scope;
195 	u8           join_state;
196 	int          proxy_join;
197 };
198 
199 /* Service Record Component Mask Sec 15.2.5.14 Ver 1.1	*/
200 #define IB_SA_SERVICE_REC_SERVICE_ID			IB_SA_COMP_MASK( 0)
201 #define IB_SA_SERVICE_REC_SERVICE_GID			IB_SA_COMP_MASK( 1)
202 #define IB_SA_SERVICE_REC_SERVICE_PKEY			IB_SA_COMP_MASK( 2)
203 /* reserved:								 3 */
204 #define IB_SA_SERVICE_REC_SERVICE_LEASE			IB_SA_COMP_MASK( 4)
205 #define IB_SA_SERVICE_REC_SERVICE_KEY			IB_SA_COMP_MASK( 5)
206 #define IB_SA_SERVICE_REC_SERVICE_NAME			IB_SA_COMP_MASK( 6)
207 #define IB_SA_SERVICE_REC_SERVICE_DATA8_0		IB_SA_COMP_MASK( 7)
208 #define IB_SA_SERVICE_REC_SERVICE_DATA8_1		IB_SA_COMP_MASK( 8)
209 #define IB_SA_SERVICE_REC_SERVICE_DATA8_2		IB_SA_COMP_MASK( 9)
210 #define IB_SA_SERVICE_REC_SERVICE_DATA8_3		IB_SA_COMP_MASK(10)
211 #define IB_SA_SERVICE_REC_SERVICE_DATA8_4		IB_SA_COMP_MASK(11)
212 #define IB_SA_SERVICE_REC_SERVICE_DATA8_5		IB_SA_COMP_MASK(12)
213 #define IB_SA_SERVICE_REC_SERVICE_DATA8_6		IB_SA_COMP_MASK(13)
214 #define IB_SA_SERVICE_REC_SERVICE_DATA8_7		IB_SA_COMP_MASK(14)
215 #define IB_SA_SERVICE_REC_SERVICE_DATA8_8		IB_SA_COMP_MASK(15)
216 #define IB_SA_SERVICE_REC_SERVICE_DATA8_9		IB_SA_COMP_MASK(16)
217 #define IB_SA_SERVICE_REC_SERVICE_DATA8_10		IB_SA_COMP_MASK(17)
218 #define IB_SA_SERVICE_REC_SERVICE_DATA8_11		IB_SA_COMP_MASK(18)
219 #define IB_SA_SERVICE_REC_SERVICE_DATA8_12		IB_SA_COMP_MASK(19)
220 #define IB_SA_SERVICE_REC_SERVICE_DATA8_13		IB_SA_COMP_MASK(20)
221 #define IB_SA_SERVICE_REC_SERVICE_DATA8_14		IB_SA_COMP_MASK(21)
222 #define IB_SA_SERVICE_REC_SERVICE_DATA8_15		IB_SA_COMP_MASK(22)
223 #define IB_SA_SERVICE_REC_SERVICE_DATA16_0		IB_SA_COMP_MASK(23)
224 #define IB_SA_SERVICE_REC_SERVICE_DATA16_1		IB_SA_COMP_MASK(24)
225 #define IB_SA_SERVICE_REC_SERVICE_DATA16_2		IB_SA_COMP_MASK(25)
226 #define IB_SA_SERVICE_REC_SERVICE_DATA16_3		IB_SA_COMP_MASK(26)
227 #define IB_SA_SERVICE_REC_SERVICE_DATA16_4		IB_SA_COMP_MASK(27)
228 #define IB_SA_SERVICE_REC_SERVICE_DATA16_5		IB_SA_COMP_MASK(28)
229 #define IB_SA_SERVICE_REC_SERVICE_DATA16_6		IB_SA_COMP_MASK(29)
230 #define IB_SA_SERVICE_REC_SERVICE_DATA16_7		IB_SA_COMP_MASK(30)
231 #define IB_SA_SERVICE_REC_SERVICE_DATA32_0		IB_SA_COMP_MASK(31)
232 #define IB_SA_SERVICE_REC_SERVICE_DATA32_1		IB_SA_COMP_MASK(32)
233 #define IB_SA_SERVICE_REC_SERVICE_DATA32_2		IB_SA_COMP_MASK(33)
234 #define IB_SA_SERVICE_REC_SERVICE_DATA32_3		IB_SA_COMP_MASK(34)
235 #define IB_SA_SERVICE_REC_SERVICE_DATA64_0		IB_SA_COMP_MASK(35)
236 #define IB_SA_SERVICE_REC_SERVICE_DATA64_1		IB_SA_COMP_MASK(36)
237 
238 #define IB_DEFAULT_SERVICE_LEASE 	0xFFFFFFFF
239 
240 struct ib_sa_service_rec {
241 	u64		id;
242 	union ib_gid	gid;
243 	__be16 		pkey;
244 	/* reserved */
245 	u32		lease;
246 	u8		key[16];
247 	u8		name[64];
248 	u8		data8[16];
249 	u16		data16[8];
250 	u32		data32[4];
251 	u64		data64[2];
252 };
253 
254 struct ib_sa_client {
255 	atomic_t users;
256 	struct completion comp;
257 };
258 
259 /**
260  * ib_sa_register_client - Register an SA client.
261  */
262 void ib_sa_register_client(struct ib_sa_client *client);
263 
264 /**
265  * ib_sa_unregister_client - Deregister an SA client.
266  * @client: Client object to deregister.
267  */
268 void ib_sa_unregister_client(struct ib_sa_client *client);
269 
270 struct ib_sa_query;
271 
272 void ib_sa_cancel_query(int id, struct ib_sa_query *query);
273 
274 int ib_sa_path_rec_get(struct ib_sa_client *client,
275 		       struct ib_device *device, u8 port_num,
276 		       struct ib_sa_path_rec *rec,
277 		       ib_sa_comp_mask comp_mask,
278 		       int timeout_ms, gfp_t gfp_mask,
279 		       void (*callback)(int status,
280 					struct ib_sa_path_rec *resp,
281 					void *context),
282 		       void *context,
283 		       struct ib_sa_query **query);
284 
285 int ib_sa_service_rec_query(struct ib_sa_client *client,
286 			 struct ib_device *device, u8 port_num,
287 			 u8 method,
288 			 struct ib_sa_service_rec *rec,
289 			 ib_sa_comp_mask comp_mask,
290 			 int timeout_ms, gfp_t gfp_mask,
291 			 void (*callback)(int status,
292 					  struct ib_sa_service_rec *resp,
293 					  void *context),
294 			 void *context,
295 			 struct ib_sa_query **sa_query);
296 
297 struct ib_sa_multicast {
298 	struct ib_sa_mcmember_rec rec;
299 	ib_sa_comp_mask		comp_mask;
300 	int			(*callback)(int status,
301 					    struct ib_sa_multicast *multicast);
302 	void			*context;
303 };
304 
305 /**
306  * ib_sa_join_multicast - Initiates a join request to the specified multicast
307  *   group.
308  * @client: SA client
309  * @device: Device associated with the multicast group.
310  * @port_num: Port on the specified device to associate with the multicast
311  *   group.
312  * @rec: SA multicast member record specifying group attributes.
313  * @comp_mask: Component mask indicating which group attributes of %rec are
314  *   valid.
315  * @gfp_mask: GFP mask for memory allocations.
316  * @callback: User callback invoked once the join operation completes.
317  * @context: User specified context stored with the ib_sa_multicast structure.
318  *
319  * This call initiates a multicast join request with the SA for the specified
320  * multicast group.  If the join operation is started successfully, it returns
321  * an ib_sa_multicast structure that is used to track the multicast operation.
322  * Users must free this structure by calling ib_free_multicast, even if the
323  * join operation later fails.  (The callback status is non-zero.)
324  *
325  * If the join operation fails; status will be non-zero, with the following
326  * failures possible:
327  * -ETIMEDOUT: The request timed out.
328  * -EIO: An error occurred sending the query.
329  * -EINVAL: The MCMemberRecord values differed from the existing group's.
330  * -ENETRESET: Indicates that an fatal error has occurred on the multicast
331  *   group, and the user must rejoin the group to continue using it.
332  */
333 struct ib_sa_multicast *ib_sa_join_multicast(struct ib_sa_client *client,
334 					     struct ib_device *device, u8 port_num,
335 					     struct ib_sa_mcmember_rec *rec,
336 					     ib_sa_comp_mask comp_mask, gfp_t gfp_mask,
337 					     int (*callback)(int status,
338 							     struct ib_sa_multicast
339 								    *multicast),
340 					     void *context);
341 
342 /**
343  * ib_free_multicast - Frees the multicast tracking structure, and releases
344  *    any reference on the multicast group.
345  * @multicast: Multicast tracking structure allocated by ib_join_multicast.
346  *
347  * This call blocks until the multicast identifier is destroyed.  It may
348  * not be called from within the multicast callback; however, returning a non-
349  * zero value from the callback will result in destroying the multicast
350  * tracking structure.
351  */
352 void ib_sa_free_multicast(struct ib_sa_multicast *multicast);
353 
354 /**
355  * ib_get_mcmember_rec - Looks up a multicast member record by its MGID and
356  *   returns it if found.
357  * @device: Device associated with the multicast group.
358  * @port_num: Port on the specified device to associate with the multicast
359  *   group.
360  * @mgid: MGID of multicast group.
361  * @rec: Location to copy SA multicast member record.
362  */
363 int ib_sa_get_mcmember_rec(struct ib_device *device, u8 port_num,
364 			   union ib_gid *mgid, struct ib_sa_mcmember_rec *rec);
365 
366 /**
367  * ib_init_ah_from_mcmember - Initialize address handle attributes based on
368  * an SA multicast member record.
369  */
370 int ib_init_ah_from_mcmember(struct ib_device *device, u8 port_num,
371 			     struct ib_sa_mcmember_rec *rec,
372 			     struct ib_ah_attr *ah_attr);
373 
374 /**
375  * ib_init_ah_from_path - Initialize address handle attributes based on an SA
376  *   path record.
377  */
378 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
379 			 struct ib_sa_path_rec *rec,
380 			 struct ib_ah_attr *ah_attr);
381 
382 /**
383  * ib_sa_unpack_path - Convert a path record from MAD format to struct
384  * ib_sa_path_rec.
385  */
386 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec);
387 
388 #endif /* IB_SA_H */
389