[PATCH] Proper fix for highmem kmap_atomic functions for VMI for 2.6.21
[linux-2.6] / include / rdma / ib_sa.h
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  * $Id: ib_sa.h 2811 2005-07-06 18:11:43Z halr $
35  */
36
37 #ifndef IB_SA_H
38 #define IB_SA_H
39
40 #include <linux/completion.h>
41 #include <linux/compiler.h>
42
43 #include <asm/atomic.h>
44
45 #include <rdma/ib_verbs.h>
46 #include <rdma/ib_mad.h>
47
48 enum {
49         IB_SA_CLASS_VERSION             = 2,    /* IB spec version 1.1/1.2 */
50
51         IB_SA_METHOD_GET_TABLE          = 0x12,
52         IB_SA_METHOD_GET_TABLE_RESP     = 0x92,
53         IB_SA_METHOD_DELETE             = 0x15,
54         IB_SA_METHOD_DELETE_RESP        = 0x95,
55         IB_SA_METHOD_GET_MULTI          = 0x14,
56         IB_SA_METHOD_GET_MULTI_RESP     = 0x94,
57         IB_SA_METHOD_GET_TRACE_TBL      = 0x13
58 };
59
60 enum {
61         IB_SA_ATTR_CLASS_PORTINFO    = 0x01,
62         IB_SA_ATTR_NOTICE            = 0x02,
63         IB_SA_ATTR_INFORM_INFO       = 0x03,
64         IB_SA_ATTR_NODE_REC          = 0x11,
65         IB_SA_ATTR_PORT_INFO_REC     = 0x12,
66         IB_SA_ATTR_SL2VL_REC         = 0x13,
67         IB_SA_ATTR_SWITCH_REC        = 0x14,
68         IB_SA_ATTR_LINEAR_FDB_REC    = 0x15,
69         IB_SA_ATTR_RANDOM_FDB_REC    = 0x16,
70         IB_SA_ATTR_MCAST_FDB_REC     = 0x17,
71         IB_SA_ATTR_SM_INFO_REC       = 0x18,
72         IB_SA_ATTR_LINK_REC          = 0x20,
73         IB_SA_ATTR_GUID_INFO_REC     = 0x30,
74         IB_SA_ATTR_SERVICE_REC       = 0x31,
75         IB_SA_ATTR_PARTITION_REC     = 0x33,
76         IB_SA_ATTR_PATH_REC          = 0x35,
77         IB_SA_ATTR_VL_ARB_REC        = 0x36,
78         IB_SA_ATTR_MC_MEMBER_REC     = 0x38,
79         IB_SA_ATTR_TRACE_REC         = 0x39,
80         IB_SA_ATTR_MULTI_PATH_REC    = 0x3a,
81         IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b,
82         IB_SA_ATTR_INFORM_INFO_REC   = 0xf3
83 };
84
85 enum ib_sa_selector {
86         IB_SA_GT   = 0,
87         IB_SA_LT   = 1,
88         IB_SA_EQ   = 2,
89         /*
90          * The meaning of "best" depends on the attribute: for
91          * example, for MTU best will return the largest available
92          * MTU, while for packet life time, best will return the
93          * smallest available life time.
94          */
95         IB_SA_BEST = 3
96 };
97
98 /*
99  * Structures for SA records are named "struct ib_sa_xxx_rec."  No
100  * attempt is made to pack structures to match the physical layout of
101  * SA records in SA MADs; all packing and unpacking is handled by the
102  * SA query code.
103  *
104  * For a record with structure ib_sa_xxx_rec, the naming convention
105  * for the component mask value for field yyy is IB_SA_XXX_REC_YYY (we
106  * never use different abbreviations or otherwise change the spelling
107  * of xxx/yyy between ib_sa_xxx_rec.yyy and IB_SA_XXX_REC_YYY).
108  *
109  * Reserved rows are indicated with comments to help maintainability.
110  */
111
112 /* reserved:                                                             0 */
113 /* reserved:                                                             1 */
114 #define IB_SA_PATH_REC_DGID                             IB_SA_COMP_MASK( 2)
115 #define IB_SA_PATH_REC_SGID                             IB_SA_COMP_MASK( 3)
116 #define IB_SA_PATH_REC_DLID                             IB_SA_COMP_MASK( 4)
117 #define IB_SA_PATH_REC_SLID                             IB_SA_COMP_MASK( 5)
118 #define IB_SA_PATH_REC_RAW_TRAFFIC                      IB_SA_COMP_MASK( 6)
119 /* reserved:                                                             7 */
120 #define IB_SA_PATH_REC_FLOW_LABEL                       IB_SA_COMP_MASK( 8)
121 #define IB_SA_PATH_REC_HOP_LIMIT                        IB_SA_COMP_MASK( 9)
122 #define IB_SA_PATH_REC_TRAFFIC_CLASS                    IB_SA_COMP_MASK(10)
123 #define IB_SA_PATH_REC_REVERSIBLE                       IB_SA_COMP_MASK(11)
124 #define IB_SA_PATH_REC_NUMB_PATH                        IB_SA_COMP_MASK(12)
125 #define IB_SA_PATH_REC_PKEY                             IB_SA_COMP_MASK(13)
126 /* reserved:                                                            14 */
127 #define IB_SA_PATH_REC_SL                               IB_SA_COMP_MASK(15)
128 #define IB_SA_PATH_REC_MTU_SELECTOR                     IB_SA_COMP_MASK(16)
129 #define IB_SA_PATH_REC_MTU                              IB_SA_COMP_MASK(17)
130 #define IB_SA_PATH_REC_RATE_SELECTOR                    IB_SA_COMP_MASK(18)
131 #define IB_SA_PATH_REC_RATE                             IB_SA_COMP_MASK(19)
132 #define IB_SA_PATH_REC_PACKET_LIFE_TIME_SELECTOR        IB_SA_COMP_MASK(20)
133 #define IB_SA_PATH_REC_PACKET_LIFE_TIME                 IB_SA_COMP_MASK(21)
134 #define IB_SA_PATH_REC_PREFERENCE                       IB_SA_COMP_MASK(22)
135
136 struct ib_sa_path_rec {
137         /* reserved */
138         /* reserved */
139         union ib_gid dgid;
140         union ib_gid sgid;
141         __be16       dlid;
142         __be16       slid;
143         int          raw_traffic;
144         /* reserved */
145         __be32       flow_label;
146         u8           hop_limit;
147         u8           traffic_class;
148         int          reversible;
149         u8           numb_path;
150         __be16       pkey;
151         /* reserved */
152         u8           sl;
153         u8           mtu_selector;
154         u8           mtu;
155         u8           rate_selector;
156         u8           rate;
157         u8           packet_life_time_selector;
158         u8           packet_life_time;
159         u8           preference;
160 };
161
162 #define IB_SA_MCMEMBER_REC_MGID                         IB_SA_COMP_MASK( 0)
163 #define IB_SA_MCMEMBER_REC_PORT_GID                     IB_SA_COMP_MASK( 1)
164 #define IB_SA_MCMEMBER_REC_QKEY                         IB_SA_COMP_MASK( 2)
165 #define IB_SA_MCMEMBER_REC_MLID                         IB_SA_COMP_MASK( 3)
166 #define IB_SA_MCMEMBER_REC_MTU_SELECTOR                 IB_SA_COMP_MASK( 4)
167 #define IB_SA_MCMEMBER_REC_MTU                          IB_SA_COMP_MASK( 5)
168 #define IB_SA_MCMEMBER_REC_TRAFFIC_CLASS                IB_SA_COMP_MASK( 6)
169 #define IB_SA_MCMEMBER_REC_PKEY                         IB_SA_COMP_MASK( 7)
170 #define IB_SA_MCMEMBER_REC_RATE_SELECTOR                IB_SA_COMP_MASK( 8)
171 #define IB_SA_MCMEMBER_REC_RATE                         IB_SA_COMP_MASK( 9)
172 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR    IB_SA_COMP_MASK(10)
173 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME             IB_SA_COMP_MASK(11)
174 #define IB_SA_MCMEMBER_REC_SL                           IB_SA_COMP_MASK(12)
175 #define IB_SA_MCMEMBER_REC_FLOW_LABEL                   IB_SA_COMP_MASK(13)
176 #define IB_SA_MCMEMBER_REC_HOP_LIMIT                    IB_SA_COMP_MASK(14)
177 #define IB_SA_MCMEMBER_REC_SCOPE                        IB_SA_COMP_MASK(15)
178 #define IB_SA_MCMEMBER_REC_JOIN_STATE                   IB_SA_COMP_MASK(16)
179 #define IB_SA_MCMEMBER_REC_PROXY_JOIN                   IB_SA_COMP_MASK(17)
180
181 struct ib_sa_mcmember_rec {
182         union ib_gid mgid;
183         union ib_gid port_gid;
184         __be32       qkey;
185         __be16       mlid;
186         u8           mtu_selector;
187         u8           mtu;
188         u8           traffic_class;
189         __be16       pkey;
190         u8           rate_selector;
191         u8           rate;
192         u8           packet_life_time_selector;
193         u8           packet_life_time;
194         u8           sl;
195         __be32       flow_label;
196         u8           hop_limit;
197         u8           scope;
198         u8           join_state;
199         int          proxy_join;
200 };
201
202 /* Service Record Component Mask Sec 15.2.5.14 Ver 1.1  */
203 #define IB_SA_SERVICE_REC_SERVICE_ID                    IB_SA_COMP_MASK( 0)
204 #define IB_SA_SERVICE_REC_SERVICE_GID                   IB_SA_COMP_MASK( 1)
205 #define IB_SA_SERVICE_REC_SERVICE_PKEY                  IB_SA_COMP_MASK( 2)
206 /* reserved:                                                             3 */
207 #define IB_SA_SERVICE_REC_SERVICE_LEASE                 IB_SA_COMP_MASK( 4)
208 #define IB_SA_SERVICE_REC_SERVICE_KEY                   IB_SA_COMP_MASK( 5)
209 #define IB_SA_SERVICE_REC_SERVICE_NAME                  IB_SA_COMP_MASK( 6)
210 #define IB_SA_SERVICE_REC_SERVICE_DATA8_0               IB_SA_COMP_MASK( 7)
211 #define IB_SA_SERVICE_REC_SERVICE_DATA8_1               IB_SA_COMP_MASK( 8)
212 #define IB_SA_SERVICE_REC_SERVICE_DATA8_2               IB_SA_COMP_MASK( 9)
213 #define IB_SA_SERVICE_REC_SERVICE_DATA8_3               IB_SA_COMP_MASK(10)
214 #define IB_SA_SERVICE_REC_SERVICE_DATA8_4               IB_SA_COMP_MASK(11)
215 #define IB_SA_SERVICE_REC_SERVICE_DATA8_5               IB_SA_COMP_MASK(12)
216 #define IB_SA_SERVICE_REC_SERVICE_DATA8_6               IB_SA_COMP_MASK(13)
217 #define IB_SA_SERVICE_REC_SERVICE_DATA8_7               IB_SA_COMP_MASK(14)
218 #define IB_SA_SERVICE_REC_SERVICE_DATA8_8               IB_SA_COMP_MASK(15)
219 #define IB_SA_SERVICE_REC_SERVICE_DATA8_9               IB_SA_COMP_MASK(16)
220 #define IB_SA_SERVICE_REC_SERVICE_DATA8_10              IB_SA_COMP_MASK(17)
221 #define IB_SA_SERVICE_REC_SERVICE_DATA8_11              IB_SA_COMP_MASK(18)
222 #define IB_SA_SERVICE_REC_SERVICE_DATA8_12              IB_SA_COMP_MASK(19)
223 #define IB_SA_SERVICE_REC_SERVICE_DATA8_13              IB_SA_COMP_MASK(20)
224 #define IB_SA_SERVICE_REC_SERVICE_DATA8_14              IB_SA_COMP_MASK(21)
225 #define IB_SA_SERVICE_REC_SERVICE_DATA8_15              IB_SA_COMP_MASK(22)
226 #define IB_SA_SERVICE_REC_SERVICE_DATA16_0              IB_SA_COMP_MASK(23)
227 #define IB_SA_SERVICE_REC_SERVICE_DATA16_1              IB_SA_COMP_MASK(24)
228 #define IB_SA_SERVICE_REC_SERVICE_DATA16_2              IB_SA_COMP_MASK(25)
229 #define IB_SA_SERVICE_REC_SERVICE_DATA16_3              IB_SA_COMP_MASK(26)
230 #define IB_SA_SERVICE_REC_SERVICE_DATA16_4              IB_SA_COMP_MASK(27)
231 #define IB_SA_SERVICE_REC_SERVICE_DATA16_5              IB_SA_COMP_MASK(28)
232 #define IB_SA_SERVICE_REC_SERVICE_DATA16_6              IB_SA_COMP_MASK(29)
233 #define IB_SA_SERVICE_REC_SERVICE_DATA16_7              IB_SA_COMP_MASK(30)
234 #define IB_SA_SERVICE_REC_SERVICE_DATA32_0              IB_SA_COMP_MASK(31)
235 #define IB_SA_SERVICE_REC_SERVICE_DATA32_1              IB_SA_COMP_MASK(32)
236 #define IB_SA_SERVICE_REC_SERVICE_DATA32_2              IB_SA_COMP_MASK(33)
237 #define IB_SA_SERVICE_REC_SERVICE_DATA32_3              IB_SA_COMP_MASK(34)
238 #define IB_SA_SERVICE_REC_SERVICE_DATA64_0              IB_SA_COMP_MASK(35)
239 #define IB_SA_SERVICE_REC_SERVICE_DATA64_1              IB_SA_COMP_MASK(36)
240
241 #define IB_DEFAULT_SERVICE_LEASE        0xFFFFFFFF
242
243 struct ib_sa_service_rec {
244         u64             id;
245         union ib_gid    gid;
246         __be16          pkey;
247         /* reserved */
248         u32             lease;
249         u8              key[16];
250         u8              name[64];
251         u8              data8[16];
252         u16             data16[8];
253         u32             data32[4];
254         u64             data64[2];
255 };
256
257 struct ib_sa_client {
258         atomic_t users;
259         struct completion comp;
260 };
261
262 /**
263  * ib_sa_register_client - Register an SA client.
264  */
265 void ib_sa_register_client(struct ib_sa_client *client);
266
267 /**
268  * ib_sa_unregister_client - Deregister an SA client.
269  * @client: Client object to deregister.
270  */
271 void ib_sa_unregister_client(struct ib_sa_client *client);
272
273 struct ib_sa_query;
274
275 void ib_sa_cancel_query(int id, struct ib_sa_query *query);
276
277 int ib_sa_path_rec_get(struct ib_sa_client *client,
278                        struct ib_device *device, u8 port_num,
279                        struct ib_sa_path_rec *rec,
280                        ib_sa_comp_mask comp_mask,
281                        int timeout_ms, gfp_t gfp_mask,
282                        void (*callback)(int status,
283                                         struct ib_sa_path_rec *resp,
284                                         void *context),
285                        void *context,
286                        struct ib_sa_query **query);
287
288 int ib_sa_service_rec_query(struct ib_sa_client *client,
289                          struct ib_device *device, u8 port_num,
290                          u8 method,
291                          struct ib_sa_service_rec *rec,
292                          ib_sa_comp_mask comp_mask,
293                          int timeout_ms, gfp_t gfp_mask,
294                          void (*callback)(int status,
295                                           struct ib_sa_service_rec *resp,
296                                           void *context),
297                          void *context,
298                          struct ib_sa_query **sa_query);
299
300 struct ib_sa_multicast {
301         struct ib_sa_mcmember_rec rec;
302         ib_sa_comp_mask         comp_mask;
303         int                     (*callback)(int status,
304                                             struct ib_sa_multicast *multicast);
305         void                    *context;
306 };
307
308 /**
309  * ib_sa_join_multicast - Initiates a join request to the specified multicast
310  *   group.
311  * @client: SA client
312  * @device: Device associated with the multicast group.
313  * @port_num: Port on the specified device to associate with the multicast
314  *   group.
315  * @rec: SA multicast member record specifying group attributes.
316  * @comp_mask: Component mask indicating which group attributes of %rec are
317  *   valid.
318  * @gfp_mask: GFP mask for memory allocations.
319  * @callback: User callback invoked once the join operation completes.
320  * @context: User specified context stored with the ib_sa_multicast structure.
321  *
322  * This call initiates a multicast join request with the SA for the specified
323  * multicast group.  If the join operation is started successfully, it returns
324  * an ib_sa_multicast structure that is used to track the multicast operation.
325  * Users must free this structure by calling ib_free_multicast, even if the
326  * join operation later fails.  (The callback status is non-zero.)
327  *
328  * If the join operation fails; status will be non-zero, with the following
329  * failures possible:
330  * -ETIMEDOUT: The request timed out.
331  * -EIO: An error occurred sending the query.
332  * -EINVAL: The MCMemberRecord values differed from the existing group's.
333  * -ENETRESET: Indicates that an fatal error has occurred on the multicast
334  *   group, and the user must rejoin the group to continue using it.
335  */
336 struct ib_sa_multicast *ib_sa_join_multicast(struct ib_sa_client *client,
337                                              struct ib_device *device, u8 port_num,
338                                              struct ib_sa_mcmember_rec *rec,
339                                              ib_sa_comp_mask comp_mask, gfp_t gfp_mask,
340                                              int (*callback)(int status,
341                                                              struct ib_sa_multicast
342                                                                     *multicast),
343                                              void *context);
344
345 /**
346  * ib_free_multicast - Frees the multicast tracking structure, and releases
347  *    any reference on the multicast group.
348  * @multicast: Multicast tracking structure allocated by ib_join_multicast.
349  *
350  * This call blocks until the multicast identifier is destroyed.  It may
351  * not be called from within the multicast callback; however, returning a non-
352  * zero value from the callback will result in destroying the multicast
353  * tracking structure.
354  */
355 void ib_sa_free_multicast(struct ib_sa_multicast *multicast);
356
357 /**
358  * ib_get_mcmember_rec - Looks up a multicast member record by its MGID and
359  *   returns it if found.
360  * @device: Device associated with the multicast group.
361  * @port_num: Port on the specified device to associate with the multicast
362  *   group.
363  * @mgid: MGID of multicast group.
364  * @rec: Location to copy SA multicast member record.
365  */
366 int ib_sa_get_mcmember_rec(struct ib_device *device, u8 port_num,
367                            union ib_gid *mgid, struct ib_sa_mcmember_rec *rec);
368
369 /**
370  * ib_init_ah_from_mcmember - Initialize address handle attributes based on
371  * an SA multicast member record.
372  */
373 int ib_init_ah_from_mcmember(struct ib_device *device, u8 port_num,
374                              struct ib_sa_mcmember_rec *rec,
375                              struct ib_ah_attr *ah_attr);
376
377 /**
378  * ib_init_ah_from_path - Initialize address handle attributes based on an SA
379  *   path record.
380  */
381 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
382                          struct ib_sa_path_rec *rec,
383                          struct ib_ah_attr *ah_attr);
384
385 #endif /* IB_SA_H */