Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. |
Roland Dreier | 2a1d9b7 | 2005-08-10 23:03:10 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Voltaire, Inc. All rights reserved. |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 4 | * Copyright (c) 2006 Intel Corporation. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 34 | * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | */ |
| 36 | |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/err.h> |
| 40 | #include <linux/random.h> |
| 41 | #include <linux/spinlock.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <linux/pci.h> |
| 44 | #include <linux/dma-mapping.h> |
| 45 | #include <linux/kref.h> |
| 46 | #include <linux/idr.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 47 | #include <linux/workqueue.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Roland Dreier | a4d61e8 | 2005-08-25 13:40:04 -0700 | [diff] [blame] | 49 | #include <rdma/ib_pack.h> |
| 50 | #include <rdma/ib_sa.h> |
Sean Hefty | 6d969a4 | 2006-06-17 20:37:39 -0700 | [diff] [blame] | 51 | #include <rdma/ib_cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | MODULE_AUTHOR("Roland Dreier"); |
| 54 | MODULE_DESCRIPTION("InfiniBand subnet administration query support"); |
| 55 | MODULE_LICENSE("Dual BSD/GPL"); |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | struct ib_sa_sm_ah { |
| 58 | struct ib_ah *ah; |
| 59 | struct kref ref; |
| 60 | }; |
| 61 | |
| 62 | struct ib_sa_port { |
| 63 | struct ib_mad_agent *agent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | struct ib_sa_sm_ah *sm_ah; |
| 65 | struct work_struct update_task; |
| 66 | spinlock_t ah_lock; |
| 67 | u8 port_num; |
| 68 | }; |
| 69 | |
| 70 | struct ib_sa_device { |
| 71 | int start_port, end_port; |
| 72 | struct ib_event_handler event_handler; |
| 73 | struct ib_sa_port port[0]; |
| 74 | }; |
| 75 | |
| 76 | struct ib_sa_query { |
| 77 | void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); |
| 78 | void (*release)(struct ib_sa_query *); |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 79 | struct ib_sa_client *client; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 80 | struct ib_sa_port *port; |
| 81 | struct ib_mad_send_buf *mad_buf; |
| 82 | struct ib_sa_sm_ah *sm_ah; |
| 83 | int id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | }; |
| 85 | |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 86 | struct ib_sa_service_query { |
| 87 | void (*callback)(int, struct ib_sa_service_rec *, void *); |
| 88 | void *context; |
| 89 | struct ib_sa_query sa_query; |
| 90 | }; |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | struct ib_sa_path_query { |
| 93 | void (*callback)(int, struct ib_sa_path_rec *, void *); |
| 94 | void *context; |
| 95 | struct ib_sa_query sa_query; |
| 96 | }; |
| 97 | |
| 98 | struct ib_sa_mcmember_query { |
| 99 | void (*callback)(int, struct ib_sa_mcmember_rec *, void *); |
| 100 | void *context; |
| 101 | struct ib_sa_query sa_query; |
| 102 | }; |
| 103 | |
| 104 | static void ib_sa_add_one(struct ib_device *device); |
| 105 | static void ib_sa_remove_one(struct ib_device *device); |
| 106 | |
| 107 | static struct ib_client sa_client = { |
| 108 | .name = "sa", |
| 109 | .add = ib_sa_add_one, |
| 110 | .remove = ib_sa_remove_one |
| 111 | }; |
| 112 | |
| 113 | static spinlock_t idr_lock; |
| 114 | static DEFINE_IDR(query_idr); |
| 115 | |
| 116 | static spinlock_t tid_lock; |
| 117 | static u32 tid; |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | #define PATH_REC_FIELD(field) \ |
| 120 | .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \ |
| 121 | .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \ |
| 122 | .field_name = "sa_path_rec:" #field |
| 123 | |
| 124 | static const struct ib_field path_rec_table[] = { |
| 125 | { RESERVED, |
| 126 | .offset_words = 0, |
| 127 | .offset_bits = 0, |
| 128 | .size_bits = 32 }, |
| 129 | { RESERVED, |
| 130 | .offset_words = 1, |
| 131 | .offset_bits = 0, |
| 132 | .size_bits = 32 }, |
| 133 | { PATH_REC_FIELD(dgid), |
| 134 | .offset_words = 2, |
| 135 | .offset_bits = 0, |
| 136 | .size_bits = 128 }, |
| 137 | { PATH_REC_FIELD(sgid), |
| 138 | .offset_words = 6, |
| 139 | .offset_bits = 0, |
| 140 | .size_bits = 128 }, |
| 141 | { PATH_REC_FIELD(dlid), |
| 142 | .offset_words = 10, |
| 143 | .offset_bits = 0, |
| 144 | .size_bits = 16 }, |
| 145 | { PATH_REC_FIELD(slid), |
| 146 | .offset_words = 10, |
| 147 | .offset_bits = 16, |
| 148 | .size_bits = 16 }, |
| 149 | { PATH_REC_FIELD(raw_traffic), |
| 150 | .offset_words = 11, |
| 151 | .offset_bits = 0, |
| 152 | .size_bits = 1 }, |
| 153 | { RESERVED, |
| 154 | .offset_words = 11, |
| 155 | .offset_bits = 1, |
| 156 | .size_bits = 3 }, |
| 157 | { PATH_REC_FIELD(flow_label), |
| 158 | .offset_words = 11, |
| 159 | .offset_bits = 4, |
| 160 | .size_bits = 20 }, |
| 161 | { PATH_REC_FIELD(hop_limit), |
| 162 | .offset_words = 11, |
| 163 | .offset_bits = 24, |
| 164 | .size_bits = 8 }, |
| 165 | { PATH_REC_FIELD(traffic_class), |
| 166 | .offset_words = 12, |
| 167 | .offset_bits = 0, |
| 168 | .size_bits = 8 }, |
| 169 | { PATH_REC_FIELD(reversible), |
| 170 | .offset_words = 12, |
| 171 | .offset_bits = 8, |
| 172 | .size_bits = 1 }, |
| 173 | { PATH_REC_FIELD(numb_path), |
| 174 | .offset_words = 12, |
| 175 | .offset_bits = 9, |
| 176 | .size_bits = 7 }, |
| 177 | { PATH_REC_FIELD(pkey), |
| 178 | .offset_words = 12, |
| 179 | .offset_bits = 16, |
| 180 | .size_bits = 16 }, |
| 181 | { RESERVED, |
| 182 | .offset_words = 13, |
| 183 | .offset_bits = 0, |
| 184 | .size_bits = 12 }, |
| 185 | { PATH_REC_FIELD(sl), |
| 186 | .offset_words = 13, |
| 187 | .offset_bits = 12, |
| 188 | .size_bits = 4 }, |
| 189 | { PATH_REC_FIELD(mtu_selector), |
| 190 | .offset_words = 13, |
| 191 | .offset_bits = 16, |
| 192 | .size_bits = 2 }, |
| 193 | { PATH_REC_FIELD(mtu), |
| 194 | .offset_words = 13, |
| 195 | .offset_bits = 18, |
| 196 | .size_bits = 6 }, |
| 197 | { PATH_REC_FIELD(rate_selector), |
| 198 | .offset_words = 13, |
| 199 | .offset_bits = 24, |
| 200 | .size_bits = 2 }, |
| 201 | { PATH_REC_FIELD(rate), |
| 202 | .offset_words = 13, |
| 203 | .offset_bits = 26, |
| 204 | .size_bits = 6 }, |
| 205 | { PATH_REC_FIELD(packet_life_time_selector), |
| 206 | .offset_words = 14, |
| 207 | .offset_bits = 0, |
| 208 | .size_bits = 2 }, |
| 209 | { PATH_REC_FIELD(packet_life_time), |
| 210 | .offset_words = 14, |
| 211 | .offset_bits = 2, |
| 212 | .size_bits = 6 }, |
| 213 | { PATH_REC_FIELD(preference), |
| 214 | .offset_words = 14, |
| 215 | .offset_bits = 8, |
| 216 | .size_bits = 8 }, |
| 217 | { RESERVED, |
| 218 | .offset_words = 14, |
| 219 | .offset_bits = 16, |
| 220 | .size_bits = 48 }, |
| 221 | }; |
| 222 | |
| 223 | #define MCMEMBER_REC_FIELD(field) \ |
| 224 | .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ |
| 225 | .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \ |
| 226 | .field_name = "sa_mcmember_rec:" #field |
| 227 | |
| 228 | static const struct ib_field mcmember_rec_table[] = { |
| 229 | { MCMEMBER_REC_FIELD(mgid), |
| 230 | .offset_words = 0, |
| 231 | .offset_bits = 0, |
| 232 | .size_bits = 128 }, |
| 233 | { MCMEMBER_REC_FIELD(port_gid), |
| 234 | .offset_words = 4, |
| 235 | .offset_bits = 0, |
| 236 | .size_bits = 128 }, |
| 237 | { MCMEMBER_REC_FIELD(qkey), |
| 238 | .offset_words = 8, |
| 239 | .offset_bits = 0, |
| 240 | .size_bits = 32 }, |
| 241 | { MCMEMBER_REC_FIELD(mlid), |
| 242 | .offset_words = 9, |
| 243 | .offset_bits = 0, |
| 244 | .size_bits = 16 }, |
| 245 | { MCMEMBER_REC_FIELD(mtu_selector), |
| 246 | .offset_words = 9, |
| 247 | .offset_bits = 16, |
| 248 | .size_bits = 2 }, |
| 249 | { MCMEMBER_REC_FIELD(mtu), |
| 250 | .offset_words = 9, |
| 251 | .offset_bits = 18, |
| 252 | .size_bits = 6 }, |
| 253 | { MCMEMBER_REC_FIELD(traffic_class), |
| 254 | .offset_words = 9, |
| 255 | .offset_bits = 24, |
| 256 | .size_bits = 8 }, |
| 257 | { MCMEMBER_REC_FIELD(pkey), |
| 258 | .offset_words = 10, |
| 259 | .offset_bits = 0, |
| 260 | .size_bits = 16 }, |
| 261 | { MCMEMBER_REC_FIELD(rate_selector), |
| 262 | .offset_words = 10, |
| 263 | .offset_bits = 16, |
| 264 | .size_bits = 2 }, |
| 265 | { MCMEMBER_REC_FIELD(rate), |
| 266 | .offset_words = 10, |
| 267 | .offset_bits = 18, |
| 268 | .size_bits = 6 }, |
| 269 | { MCMEMBER_REC_FIELD(packet_life_time_selector), |
| 270 | .offset_words = 10, |
| 271 | .offset_bits = 24, |
| 272 | .size_bits = 2 }, |
| 273 | { MCMEMBER_REC_FIELD(packet_life_time), |
| 274 | .offset_words = 10, |
| 275 | .offset_bits = 26, |
| 276 | .size_bits = 6 }, |
| 277 | { MCMEMBER_REC_FIELD(sl), |
| 278 | .offset_words = 11, |
| 279 | .offset_bits = 0, |
| 280 | .size_bits = 4 }, |
| 281 | { MCMEMBER_REC_FIELD(flow_label), |
| 282 | .offset_words = 11, |
| 283 | .offset_bits = 4, |
| 284 | .size_bits = 20 }, |
| 285 | { MCMEMBER_REC_FIELD(hop_limit), |
| 286 | .offset_words = 11, |
| 287 | .offset_bits = 24, |
| 288 | .size_bits = 8 }, |
| 289 | { MCMEMBER_REC_FIELD(scope), |
| 290 | .offset_words = 12, |
| 291 | .offset_bits = 0, |
| 292 | .size_bits = 4 }, |
| 293 | { MCMEMBER_REC_FIELD(join_state), |
| 294 | .offset_words = 12, |
| 295 | .offset_bits = 4, |
| 296 | .size_bits = 4 }, |
| 297 | { MCMEMBER_REC_FIELD(proxy_join), |
| 298 | .offset_words = 12, |
| 299 | .offset_bits = 8, |
| 300 | .size_bits = 1 }, |
| 301 | { RESERVED, |
| 302 | .offset_words = 12, |
| 303 | .offset_bits = 9, |
| 304 | .size_bits = 23 }, |
| 305 | }; |
| 306 | |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 307 | #define SERVICE_REC_FIELD(field) \ |
| 308 | .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ |
| 309 | .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \ |
| 310 | .field_name = "sa_service_rec:" #field |
| 311 | |
| 312 | static const struct ib_field service_rec_table[] = { |
| 313 | { SERVICE_REC_FIELD(id), |
| 314 | .offset_words = 0, |
| 315 | .offset_bits = 0, |
| 316 | .size_bits = 64 }, |
| 317 | { SERVICE_REC_FIELD(gid), |
| 318 | .offset_words = 2, |
| 319 | .offset_bits = 0, |
| 320 | .size_bits = 128 }, |
| 321 | { SERVICE_REC_FIELD(pkey), |
| 322 | .offset_words = 6, |
| 323 | .offset_bits = 0, |
| 324 | .size_bits = 16 }, |
| 325 | { SERVICE_REC_FIELD(lease), |
| 326 | .offset_words = 7, |
| 327 | .offset_bits = 0, |
| 328 | .size_bits = 32 }, |
| 329 | { SERVICE_REC_FIELD(key), |
| 330 | .offset_words = 8, |
| 331 | .offset_bits = 0, |
| 332 | .size_bits = 128 }, |
| 333 | { SERVICE_REC_FIELD(name), |
| 334 | .offset_words = 12, |
| 335 | .offset_bits = 0, |
| 336 | .size_bits = 64*8 }, |
| 337 | { SERVICE_REC_FIELD(data8), |
| 338 | .offset_words = 28, |
| 339 | .offset_bits = 0, |
| 340 | .size_bits = 16*8 }, |
| 341 | { SERVICE_REC_FIELD(data16), |
| 342 | .offset_words = 32, |
| 343 | .offset_bits = 0, |
| 344 | .size_bits = 8*16 }, |
| 345 | { SERVICE_REC_FIELD(data32), |
| 346 | .offset_words = 36, |
| 347 | .offset_bits = 0, |
| 348 | .size_bits = 4*32 }, |
| 349 | { SERVICE_REC_FIELD(data64), |
| 350 | .offset_words = 40, |
| 351 | .offset_bits = 0, |
| 352 | .size_bits = 2*64 }, |
| 353 | }; |
| 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | static void free_sm_ah(struct kref *kref) |
| 356 | { |
| 357 | struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); |
| 358 | |
| 359 | ib_destroy_ah(sm_ah->ah); |
| 360 | kfree(sm_ah); |
| 361 | } |
| 362 | |
| 363 | static void update_sm_ah(void *port_ptr) |
| 364 | { |
| 365 | struct ib_sa_port *port = port_ptr; |
| 366 | struct ib_sa_sm_ah *new_ah, *old_ah; |
| 367 | struct ib_port_attr port_attr; |
| 368 | struct ib_ah_attr ah_attr; |
| 369 | |
| 370 | if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { |
| 371 | printk(KERN_WARNING "Couldn't query port\n"); |
| 372 | return; |
| 373 | } |
| 374 | |
| 375 | new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL); |
| 376 | if (!new_ah) { |
| 377 | printk(KERN_WARNING "Couldn't allocate new SM AH\n"); |
| 378 | return; |
| 379 | } |
| 380 | |
| 381 | kref_init(&new_ah->ref); |
| 382 | |
| 383 | memset(&ah_attr, 0, sizeof ah_attr); |
| 384 | ah_attr.dlid = port_attr.sm_lid; |
| 385 | ah_attr.sl = port_attr.sm_sl; |
| 386 | ah_attr.port_num = port->port_num; |
| 387 | |
| 388 | new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr); |
| 389 | if (IS_ERR(new_ah->ah)) { |
| 390 | printk(KERN_WARNING "Couldn't create new SM AH\n"); |
| 391 | kfree(new_ah); |
| 392 | return; |
| 393 | } |
| 394 | |
| 395 | spin_lock_irq(&port->ah_lock); |
| 396 | old_ah = port->sm_ah; |
| 397 | port->sm_ah = new_ah; |
| 398 | spin_unlock_irq(&port->ah_lock); |
| 399 | |
| 400 | if (old_ah) |
| 401 | kref_put(&old_ah->ref, free_sm_ah); |
| 402 | } |
| 403 | |
| 404 | static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event) |
| 405 | { |
| 406 | if (event->event == IB_EVENT_PORT_ERR || |
| 407 | event->event == IB_EVENT_PORT_ACTIVE || |
| 408 | event->event == IB_EVENT_LID_CHANGE || |
| 409 | event->event == IB_EVENT_PKEY_CHANGE || |
Jack Morgenstein | acaea9e | 2006-08-15 17:20:50 +0300 | [diff] [blame] | 410 | event->event == IB_EVENT_SM_CHANGE || |
| 411 | event->event == IB_EVENT_CLIENT_REREGISTER) { |
Michael S. Tsirkin | 1d6801f9 | 2005-09-01 09:19:44 -0700 | [diff] [blame] | 412 | struct ib_sa_device *sa_dev; |
| 413 | sa_dev = container_of(handler, typeof(*sa_dev), event_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
| 415 | schedule_work(&sa_dev->port[event->element.port_num - |
| 416 | sa_dev->start_port].update_task); |
| 417 | } |
| 418 | } |
| 419 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 420 | void ib_sa_register_client(struct ib_sa_client *client) |
| 421 | { |
| 422 | atomic_set(&client->users, 1); |
| 423 | init_completion(&client->comp); |
| 424 | } |
| 425 | EXPORT_SYMBOL(ib_sa_register_client); |
| 426 | |
| 427 | static inline void ib_sa_client_get(struct ib_sa_client *client) |
| 428 | { |
| 429 | atomic_inc(&client->users); |
| 430 | } |
| 431 | |
| 432 | static inline void ib_sa_client_put(struct ib_sa_client *client) |
| 433 | { |
| 434 | if (atomic_dec_and_test(&client->users)) |
| 435 | complete(&client->comp); |
| 436 | } |
| 437 | |
| 438 | void ib_sa_unregister_client(struct ib_sa_client *client) |
| 439 | { |
| 440 | ib_sa_client_put(client); |
| 441 | wait_for_completion(&client->comp); |
| 442 | } |
| 443 | EXPORT_SYMBOL(ib_sa_unregister_client); |
| 444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | /** |
| 446 | * ib_sa_cancel_query - try to cancel an SA query |
| 447 | * @id:ID of query to cancel |
| 448 | * @query:query pointer to cancel |
| 449 | * |
| 450 | * Try to cancel an SA query. If the id and query don't match up or |
| 451 | * the query has already completed, nothing is done. Otherwise the |
| 452 | * query is canceled and will complete with a status of -EINTR. |
| 453 | */ |
| 454 | void ib_sa_cancel_query(int id, struct ib_sa_query *query) |
| 455 | { |
| 456 | unsigned long flags; |
| 457 | struct ib_mad_agent *agent; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 458 | struct ib_mad_send_buf *mad_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | spin_lock_irqsave(&idr_lock, flags); |
| 461 | if (idr_find(&query_idr, id) != query) { |
| 462 | spin_unlock_irqrestore(&idr_lock, flags); |
| 463 | return; |
| 464 | } |
| 465 | agent = query->port->agent; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 466 | mad_buf = query->mad_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | spin_unlock_irqrestore(&idr_lock, flags); |
| 468 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 469 | ib_cancel_mad(agent, mad_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | } |
| 471 | EXPORT_SYMBOL(ib_sa_cancel_query); |
| 472 | |
Sean Hefty | 6d969a4 | 2006-06-17 20:37:39 -0700 | [diff] [blame] | 473 | int ib_init_ah_from_path(struct ib_device *device, u8 port_num, |
| 474 | struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr) |
| 475 | { |
| 476 | int ret; |
| 477 | u16 gid_index; |
| 478 | |
| 479 | memset(ah_attr, 0, sizeof *ah_attr); |
| 480 | ah_attr->dlid = be16_to_cpu(rec->dlid); |
| 481 | ah_attr->sl = rec->sl; |
| 482 | ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 0x7f; |
| 483 | ah_attr->port_num = port_num; |
| 484 | |
| 485 | if (rec->hop_limit > 1) { |
| 486 | ah_attr->ah_flags = IB_AH_GRH; |
| 487 | ah_attr->grh.dgid = rec->dgid; |
| 488 | |
| 489 | ret = ib_find_cached_gid(device, &rec->sgid, &port_num, |
| 490 | &gid_index); |
| 491 | if (ret) |
| 492 | return ret; |
| 493 | |
Sean Hefty | ca222c6 | 2006-06-17 20:37:40 -0700 | [diff] [blame] | 494 | ah_attr->grh.sgid_index = gid_index; |
| 495 | ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label); |
| 496 | ah_attr->grh.hop_limit = rec->hop_limit; |
Sean Hefty | 6d969a4 | 2006-06-17 20:37:39 -0700 | [diff] [blame] | 497 | ah_attr->grh.traffic_class = rec->traffic_class; |
| 498 | } |
| 499 | return 0; |
| 500 | } |
| 501 | EXPORT_SYMBOL(ib_init_ah_from_path); |
| 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) |
| 504 | { |
| 505 | unsigned long flags; |
| 506 | |
| 507 | memset(mad, 0, sizeof *mad); |
| 508 | |
| 509 | mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; |
| 510 | mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; |
| 511 | mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; |
| 512 | |
| 513 | spin_lock_irqsave(&tid_lock, flags); |
| 514 | mad->mad_hdr.tid = |
| 515 | cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); |
| 516 | spin_unlock_irqrestore(&tid_lock, flags); |
| 517 | } |
| 518 | |
Michael S. Tsirkin | e322fed | 2006-07-14 00:23:56 -0700 | [diff] [blame] | 519 | static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | unsigned long flags; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 522 | int ret, id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | retry: |
Michael S. Tsirkin | e322fed | 2006-07-14 00:23:56 -0700 | [diff] [blame] | 525 | if (!idr_pre_get(&query_idr, gfp_mask)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | return -ENOMEM; |
| 527 | spin_lock_irqsave(&idr_lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 528 | ret = idr_get_new(&query_idr, query, &id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | spin_unlock_irqrestore(&idr_lock, flags); |
| 530 | if (ret == -EAGAIN) |
| 531 | goto retry; |
| 532 | if (ret) |
| 533 | return ret; |
| 534 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 535 | query->mad_buf->timeout_ms = timeout_ms; |
| 536 | query->mad_buf->context[0] = query; |
| 537 | query->id = id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 539 | spin_lock_irqsave(&query->port->ah_lock, flags); |
| 540 | kref_get(&query->port->sm_ah->ref); |
| 541 | query->sm_ah = query->port->sm_ah; |
| 542 | spin_unlock_irqrestore(&query->port->ah_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 544 | query->mad_buf->ah = query->sm_ah->ah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 546 | ret = ib_post_send_mad(query->mad_buf, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | if (ret) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | spin_lock_irqsave(&idr_lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 549 | idr_remove(&query_idr, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | spin_unlock_irqrestore(&idr_lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 551 | |
| 552 | kref_put(&query->sm_ah->ref, free_sm_ah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |
| 554 | |
Roland Dreier | dae4c1d | 2005-06-27 14:36:46 -0700 | [diff] [blame] | 555 | /* |
| 556 | * It's not safe to dereference query any more, because the |
| 557 | * send may already have completed and freed the query in |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 558 | * another context. |
Roland Dreier | dae4c1d | 2005-06-27 14:36:46 -0700 | [diff] [blame] | 559 | */ |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 560 | return ret ? ret : id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
| 563 | static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, |
| 564 | int status, |
| 565 | struct ib_sa_mad *mad) |
| 566 | { |
| 567 | struct ib_sa_path_query *query = |
| 568 | container_of(sa_query, struct ib_sa_path_query, sa_query); |
| 569 | |
| 570 | if (mad) { |
| 571 | struct ib_sa_path_rec rec; |
| 572 | |
| 573 | ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), |
| 574 | mad->data, &rec); |
| 575 | query->callback(status, &rec, query->context); |
| 576 | } else |
| 577 | query->callback(status, NULL, query->context); |
| 578 | } |
| 579 | |
| 580 | static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) |
| 581 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * ib_sa_path_rec_get - Start a Path get query |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 587 | * @client:SA client |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | * @device:device to send query on |
| 589 | * @port_num: port number to send query on |
| 590 | * @rec:Path Record to send in query |
| 591 | * @comp_mask:component mask to send in query |
| 592 | * @timeout_ms:time to wait for response |
| 593 | * @gfp_mask:GFP mask to use for internal allocations |
| 594 | * @callback:function called when query completes, times out or is |
| 595 | * canceled |
| 596 | * @context:opaque user context passed to callback |
| 597 | * @sa_query:query context, used to cancel query |
| 598 | * |
| 599 | * Send a Path Record Get query to the SA to look up a path. The |
| 600 | * callback function will be called when the query completes (or |
| 601 | * fails); status is 0 for a successful response, -EINTR if the query |
| 602 | * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error |
| 603 | * occurred sending the query. The resp parameter of the callback is |
| 604 | * only valid if status is 0. |
| 605 | * |
| 606 | * If the return value of ib_sa_path_rec_get() is negative, it is an |
| 607 | * error code. Otherwise it is a query ID that can be used to cancel |
| 608 | * the query. |
| 609 | */ |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 610 | int ib_sa_path_rec_get(struct ib_sa_client *client, |
| 611 | struct ib_device *device, u8 port_num, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | struct ib_sa_path_rec *rec, |
| 613 | ib_sa_comp_mask comp_mask, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 614 | int timeout_ms, gfp_t gfp_mask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | void (*callback)(int status, |
| 616 | struct ib_sa_path_rec *resp, |
| 617 | void *context), |
| 618 | void *context, |
| 619 | struct ib_sa_query **sa_query) |
| 620 | { |
| 621 | struct ib_sa_path_query *query; |
| 622 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); |
Roland Dreier | 56c202d | 2005-10-13 10:45:02 -0700 | [diff] [blame] | 623 | struct ib_sa_port *port; |
| 624 | struct ib_mad_agent *agent; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 625 | struct ib_sa_mad *mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | int ret; |
| 627 | |
Roland Dreier | 56c202d | 2005-10-13 10:45:02 -0700 | [diff] [blame] | 628 | if (!sa_dev) |
| 629 | return -ENODEV; |
| 630 | |
| 631 | port = &sa_dev->port[port_num - sa_dev->start_port]; |
| 632 | agent = port->agent; |
| 633 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | query = kmalloc(sizeof *query, gfp_mask); |
| 635 | if (!query) |
| 636 | return -ENOMEM; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 637 | |
| 638 | query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0, |
| 639 | 0, IB_MGMT_SA_HDR, |
| 640 | IB_MGMT_SA_DATA, gfp_mask); |
| 641 | if (!query->sa_query.mad_buf) { |
| 642 | ret = -ENOMEM; |
| 643 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | } |
| 645 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 646 | ib_sa_client_get(client); |
| 647 | query->sa_query.client = client; |
| 648 | query->callback = callback; |
| 649 | query->context = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 651 | mad = query->sa_query.mad_buf->mad; |
| 652 | init_mad(mad, agent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 654 | query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; |
| 655 | query->sa_query.release = ib_sa_path_rec_release; |
| 656 | query->sa_query.port = port; |
| 657 | mad->mad_hdr.method = IB_MGMT_METHOD_GET; |
| 658 | mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); |
| 659 | mad->sa_hdr.comp_mask = comp_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 661 | ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
| 663 | *sa_query = &query->sa_query; |
Roland Dreier | dae4c1d | 2005-06-27 14:36:46 -0700 | [diff] [blame] | 664 | |
Michael S. Tsirkin | e322fed | 2006-07-14 00:23:56 -0700 | [diff] [blame] | 665 | ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 666 | if (ret < 0) |
| 667 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Roland Dreier | dae4c1d | 2005-06-27 14:36:46 -0700 | [diff] [blame] | 669 | return ret; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 670 | |
| 671 | err2: |
| 672 | *sa_query = NULL; |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 673 | ib_sa_client_put(query->sa_query.client); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 674 | ib_free_send_mad(query->sa_query.mad_buf); |
| 675 | |
| 676 | err1: |
| 677 | kfree(query); |
| 678 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | } |
| 680 | EXPORT_SYMBOL(ib_sa_path_rec_get); |
| 681 | |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 682 | static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, |
| 683 | int status, |
| 684 | struct ib_sa_mad *mad) |
| 685 | { |
| 686 | struct ib_sa_service_query *query = |
| 687 | container_of(sa_query, struct ib_sa_service_query, sa_query); |
| 688 | |
| 689 | if (mad) { |
| 690 | struct ib_sa_service_rec rec; |
| 691 | |
| 692 | ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), |
| 693 | mad->data, &rec); |
| 694 | query->callback(status, &rec, query->context); |
| 695 | } else |
| 696 | query->callback(status, NULL, query->context); |
| 697 | } |
| 698 | |
| 699 | static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) |
| 700 | { |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 701 | kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); |
| 702 | } |
| 703 | |
| 704 | /** |
| 705 | * ib_sa_service_rec_query - Start Service Record operation |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 706 | * @client:SA client |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 707 | * @device:device to send request on |
| 708 | * @port_num: port number to send request on |
| 709 | * @method:SA method - should be get, set, or delete |
| 710 | * @rec:Service Record to send in request |
| 711 | * @comp_mask:component mask to send in request |
| 712 | * @timeout_ms:time to wait for response |
| 713 | * @gfp_mask:GFP mask to use for internal allocations |
| 714 | * @callback:function called when request completes, times out or is |
| 715 | * canceled |
| 716 | * @context:opaque user context passed to callback |
| 717 | * @sa_query:request context, used to cancel request |
| 718 | * |
| 719 | * Send a Service Record set/get/delete to the SA to register, |
| 720 | * unregister or query a service record. |
| 721 | * The callback function will be called when the request completes (or |
| 722 | * fails); status is 0 for a successful response, -EINTR if the query |
| 723 | * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error |
| 724 | * occurred sending the query. The resp parameter of the callback is |
| 725 | * only valid if status is 0. |
| 726 | * |
| 727 | * If the return value of ib_sa_service_rec_query() is negative, it is an |
| 728 | * error code. Otherwise it is a request ID that can be used to cancel |
| 729 | * the query. |
| 730 | */ |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 731 | int ib_sa_service_rec_query(struct ib_sa_client *client, |
| 732 | struct ib_device *device, u8 port_num, u8 method, |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 733 | struct ib_sa_service_rec *rec, |
| 734 | ib_sa_comp_mask comp_mask, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 735 | int timeout_ms, gfp_t gfp_mask, |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 736 | void (*callback)(int status, |
| 737 | struct ib_sa_service_rec *resp, |
| 738 | void *context), |
| 739 | void *context, |
| 740 | struct ib_sa_query **sa_query) |
| 741 | { |
| 742 | struct ib_sa_service_query *query; |
| 743 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); |
Roland Dreier | 56c202d | 2005-10-13 10:45:02 -0700 | [diff] [blame] | 744 | struct ib_sa_port *port; |
| 745 | struct ib_mad_agent *agent; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 746 | struct ib_sa_mad *mad; |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 747 | int ret; |
| 748 | |
Roland Dreier | 56c202d | 2005-10-13 10:45:02 -0700 | [diff] [blame] | 749 | if (!sa_dev) |
| 750 | return -ENODEV; |
| 751 | |
| 752 | port = &sa_dev->port[port_num - sa_dev->start_port]; |
| 753 | agent = port->agent; |
| 754 | |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 755 | if (method != IB_MGMT_METHOD_GET && |
| 756 | method != IB_MGMT_METHOD_SET && |
| 757 | method != IB_SA_METHOD_DELETE) |
| 758 | return -EINVAL; |
| 759 | |
| 760 | query = kmalloc(sizeof *query, gfp_mask); |
| 761 | if (!query) |
| 762 | return -ENOMEM; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 763 | |
| 764 | query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0, |
| 765 | 0, IB_MGMT_SA_HDR, |
| 766 | IB_MGMT_SA_DATA, gfp_mask); |
| 767 | if (!query->sa_query.mad_buf) { |
| 768 | ret = -ENOMEM; |
| 769 | goto err1; |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 770 | } |
| 771 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 772 | ib_sa_client_get(client); |
| 773 | query->sa_query.client = client; |
| 774 | query->callback = callback; |
| 775 | query->context = context; |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 776 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 777 | mad = query->sa_query.mad_buf->mad; |
| 778 | init_mad(mad, agent); |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 779 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 780 | query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; |
| 781 | query->sa_query.release = ib_sa_service_rec_release; |
| 782 | query->sa_query.port = port; |
| 783 | mad->mad_hdr.method = method; |
| 784 | mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); |
| 785 | mad->sa_hdr.comp_mask = comp_mask; |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 786 | |
| 787 | ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 788 | rec, mad->data); |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 789 | |
| 790 | *sa_query = &query->sa_query; |
| 791 | |
Michael S. Tsirkin | e322fed | 2006-07-14 00:23:56 -0700 | [diff] [blame] | 792 | ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 793 | if (ret < 0) |
| 794 | goto err2; |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 795 | |
| 796 | return ret; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 797 | |
| 798 | err2: |
| 799 | *sa_query = NULL; |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 800 | ib_sa_client_put(query->sa_query.client); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 801 | ib_free_send_mad(query->sa_query.mad_buf); |
| 802 | |
| 803 | err1: |
| 804 | kfree(query); |
| 805 | return ret; |
Hal Rosenstock | cbae32c | 2005-07-27 11:45:38 -0700 | [diff] [blame] | 806 | } |
| 807 | EXPORT_SYMBOL(ib_sa_service_rec_query); |
| 808 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, |
| 810 | int status, |
| 811 | struct ib_sa_mad *mad) |
| 812 | { |
| 813 | struct ib_sa_mcmember_query *query = |
| 814 | container_of(sa_query, struct ib_sa_mcmember_query, sa_query); |
| 815 | |
| 816 | if (mad) { |
| 817 | struct ib_sa_mcmember_rec rec; |
| 818 | |
| 819 | ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), |
| 820 | mad->data, &rec); |
| 821 | query->callback(status, &rec, query->context); |
| 822 | } else |
| 823 | query->callback(status, NULL, query->context); |
| 824 | } |
| 825 | |
| 826 | static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) |
| 827 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); |
| 829 | } |
| 830 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 831 | int ib_sa_mcmember_rec_query(struct ib_sa_client *client, |
| 832 | struct ib_device *device, u8 port_num, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | u8 method, |
| 834 | struct ib_sa_mcmember_rec *rec, |
| 835 | ib_sa_comp_mask comp_mask, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 836 | int timeout_ms, gfp_t gfp_mask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | void (*callback)(int status, |
| 838 | struct ib_sa_mcmember_rec *resp, |
| 839 | void *context), |
| 840 | void *context, |
| 841 | struct ib_sa_query **sa_query) |
| 842 | { |
| 843 | struct ib_sa_mcmember_query *query; |
| 844 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); |
Roland Dreier | 56c202d | 2005-10-13 10:45:02 -0700 | [diff] [blame] | 845 | struct ib_sa_port *port; |
| 846 | struct ib_mad_agent *agent; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 847 | struct ib_sa_mad *mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | int ret; |
| 849 | |
Roland Dreier | 56c202d | 2005-10-13 10:45:02 -0700 | [diff] [blame] | 850 | if (!sa_dev) |
| 851 | return -ENODEV; |
| 852 | |
| 853 | port = &sa_dev->port[port_num - sa_dev->start_port]; |
| 854 | agent = port->agent; |
| 855 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | query = kmalloc(sizeof *query, gfp_mask); |
| 857 | if (!query) |
| 858 | return -ENOMEM; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 859 | |
| 860 | query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0, |
| 861 | 0, IB_MGMT_SA_HDR, |
| 862 | IB_MGMT_SA_DATA, gfp_mask); |
| 863 | if (!query->sa_query.mad_buf) { |
| 864 | ret = -ENOMEM; |
| 865 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | } |
| 867 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 868 | ib_sa_client_get(client); |
| 869 | query->sa_query.client = client; |
| 870 | query->callback = callback; |
| 871 | query->context = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 873 | mad = query->sa_query.mad_buf->mad; |
| 874 | init_mad(mad, agent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 876 | query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; |
| 877 | query->sa_query.release = ib_sa_mcmember_rec_release; |
| 878 | query->sa_query.port = port; |
| 879 | mad->mad_hdr.method = method; |
| 880 | mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); |
| 881 | mad->sa_hdr.comp_mask = comp_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | |
| 883 | ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 884 | rec, mad->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
| 886 | *sa_query = &query->sa_query; |
Roland Dreier | dae4c1d | 2005-06-27 14:36:46 -0700 | [diff] [blame] | 887 | |
Michael S. Tsirkin | e322fed | 2006-07-14 00:23:56 -0700 | [diff] [blame] | 888 | ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 889 | if (ret < 0) |
| 890 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
Roland Dreier | dae4c1d | 2005-06-27 14:36:46 -0700 | [diff] [blame] | 892 | return ret; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 893 | |
| 894 | err2: |
| 895 | *sa_query = NULL; |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 896 | ib_sa_client_put(query->sa_query.client); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 897 | ib_free_send_mad(query->sa_query.mad_buf); |
| 898 | |
| 899 | err1: |
| 900 | kfree(query); |
| 901 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } |
| 903 | EXPORT_SYMBOL(ib_sa_mcmember_rec_query); |
| 904 | |
| 905 | static void send_handler(struct ib_mad_agent *agent, |
| 906 | struct ib_mad_send_wc *mad_send_wc) |
| 907 | { |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 908 | struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | unsigned long flags; |
| 910 | |
Roland Dreier | e4f50f0 | 2005-05-25 12:31:29 -0700 | [diff] [blame] | 911 | if (query->callback) |
| 912 | switch (mad_send_wc->status) { |
| 913 | case IB_WC_SUCCESS: |
| 914 | /* No callback -- already got recv */ |
| 915 | break; |
| 916 | case IB_WC_RESP_TIMEOUT_ERR: |
| 917 | query->callback(query, -ETIMEDOUT, NULL); |
| 918 | break; |
| 919 | case IB_WC_WR_FLUSH_ERR: |
| 920 | query->callback(query, -EINTR, NULL); |
| 921 | break; |
| 922 | default: |
| 923 | query->callback(query, -EIO, NULL); |
| 924 | break; |
| 925 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | spin_lock_irqsave(&idr_lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 928 | idr_remove(&query_idr, query->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | spin_unlock_irqrestore(&idr_lock, flags); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 930 | |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 931 | ib_free_send_mad(mad_send_wc->send_buf); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 932 | kref_put(&query->sm_ah->ref, free_sm_ah); |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 933 | ib_sa_client_put(query->client); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 934 | query->release(query); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | static void recv_handler(struct ib_mad_agent *mad_agent, |
| 938 | struct ib_mad_recv_wc *mad_recv_wc) |
| 939 | { |
| 940 | struct ib_sa_query *query; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 941 | struct ib_mad_send_buf *mad_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 943 | mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id; |
| 944 | query = mad_buf->context[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 946 | if (query->callback) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | if (mad_recv_wc->wc->status == IB_WC_SUCCESS) |
| 948 | query->callback(query, |
| 949 | mad_recv_wc->recv_buf.mad->mad_hdr.status ? |
| 950 | -EINVAL : 0, |
| 951 | (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); |
| 952 | else |
| 953 | query->callback(query, -EIO, NULL); |
| 954 | } |
| 955 | |
| 956 | ib_free_recv_mad(mad_recv_wc); |
| 957 | } |
| 958 | |
| 959 | static void ib_sa_add_one(struct ib_device *device) |
| 960 | { |
| 961 | struct ib_sa_device *sa_dev; |
| 962 | int s, e, i; |
| 963 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 964 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
| 965 | return; |
| 966 | |
| 967 | if (device->node_type == RDMA_NODE_IB_SWITCH) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | s = e = 0; |
| 969 | else { |
| 970 | s = 1; |
| 971 | e = device->phys_port_cnt; |
| 972 | } |
| 973 | |
| 974 | sa_dev = kmalloc(sizeof *sa_dev + |
| 975 | (e - s + 1) * sizeof (struct ib_sa_port), |
| 976 | GFP_KERNEL); |
| 977 | if (!sa_dev) |
| 978 | return; |
| 979 | |
| 980 | sa_dev->start_port = s; |
| 981 | sa_dev->end_port = e; |
| 982 | |
| 983 | for (i = 0; i <= e - s; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | sa_dev->port[i].sm_ah = NULL; |
| 985 | sa_dev->port[i].port_num = i + s; |
| 986 | spin_lock_init(&sa_dev->port[i].ah_lock); |
| 987 | |
| 988 | sa_dev->port[i].agent = |
| 989 | ib_register_mad_agent(device, i + s, IB_QPT_GSI, |
| 990 | NULL, 0, send_handler, |
| 991 | recv_handler, sa_dev); |
| 992 | if (IS_ERR(sa_dev->port[i].agent)) |
| 993 | goto err; |
| 994 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | INIT_WORK(&sa_dev->port[i].update_task, |
| 996 | update_sm_ah, &sa_dev->port[i]); |
| 997 | } |
| 998 | |
| 999 | ib_set_client_data(device, &sa_client, sa_dev); |
| 1000 | |
| 1001 | /* |
| 1002 | * We register our event handler after everything is set up, |
| 1003 | * and then update our cached info after the event handler is |
| 1004 | * registered to avoid any problems if a port changes state |
| 1005 | * during our initialization. |
| 1006 | */ |
| 1007 | |
| 1008 | INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); |
| 1009 | if (ib_register_event_handler(&sa_dev->event_handler)) |
| 1010 | goto err; |
| 1011 | |
| 1012 | for (i = 0; i <= e - s; ++i) |
| 1013 | update_sm_ah(&sa_dev->port[i]); |
| 1014 | |
| 1015 | return; |
| 1016 | |
| 1017 | err: |
Hal Rosenstock | b82cab6 | 2005-07-27 11:45:22 -0700 | [diff] [blame] | 1018 | while (--i >= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | ib_unregister_mad_agent(sa_dev->port[i].agent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
| 1021 | kfree(sa_dev); |
| 1022 | |
| 1023 | return; |
| 1024 | } |
| 1025 | |
| 1026 | static void ib_sa_remove_one(struct ib_device *device) |
| 1027 | { |
| 1028 | struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); |
| 1029 | int i; |
| 1030 | |
| 1031 | if (!sa_dev) |
| 1032 | return; |
| 1033 | |
| 1034 | ib_unregister_event_handler(&sa_dev->event_handler); |
| 1035 | |
Michael S. Tsirkin | 0f47ae0 | 2006-01-17 09:53:51 -0800 | [diff] [blame] | 1036 | flush_scheduled_work(); |
| 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { |
| 1039 | ib_unregister_mad_agent(sa_dev->port[i].agent); |
| 1040 | kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); |
| 1041 | } |
| 1042 | |
| 1043 | kfree(sa_dev); |
| 1044 | } |
| 1045 | |
| 1046 | static int __init ib_sa_init(void) |
| 1047 | { |
| 1048 | int ret; |
| 1049 | |
| 1050 | spin_lock_init(&idr_lock); |
| 1051 | spin_lock_init(&tid_lock); |
| 1052 | |
| 1053 | get_random_bytes(&tid, sizeof tid); |
| 1054 | |
| 1055 | ret = ib_register_client(&sa_client); |
| 1056 | if (ret) |
| 1057 | printk(KERN_ERR "Couldn't register ib_sa client\n"); |
| 1058 | |
| 1059 | return ret; |
| 1060 | } |
| 1061 | |
| 1062 | static void __exit ib_sa_cleanup(void) |
| 1063 | { |
| 1064 | ib_unregister_client(&sa_client); |
Roland Dreier | 5d7edb3 | 2005-10-24 10:53:25 -0700 | [diff] [blame] | 1065 | idr_destroy(&query_idr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | } |
| 1067 | |
| 1068 | module_init(ib_sa_init); |
| 1069 | module_exit(ib_sa_cleanup); |