hci_unit.c revision 1.1.2.9
1 /* $NetBSD: hci_unit.c,v 1.1.2.9 2008/03/24 09:39:10 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 Iain Hibbert. 5 * Copyright (c) 2006 Itronix Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of Itronix Inc. may not be used to endorse 17 * or promote products derived from this software without specific 18 * prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: hci_unit.c,v 1.1.2.9 2008/03/24 09:39:10 yamt Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/conf.h> 38 #include <sys/device.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/mbuf.h> 42 #include <sys/proc.h> 43 #include <sys/queue.h> 44 #include <sys/systm.h> 45 #include <sys/intr.h> 46 47 #include <netbt/bluetooth.h> 48 #include <netbt/hci.h> 49 50 struct hci_unit_list hci_unit_list = SIMPLEQ_HEAD_INITIALIZER(hci_unit_list); 51 52 MALLOC_DEFINE(M_BLUETOOTH, "Bluetooth", "Bluetooth System Memory"); 53 54 /* 55 * HCI Input Queue max lengths. 56 */ 57 int hci_eventq_max = 20; 58 int hci_aclrxq_max = 50; 59 int hci_scorxq_max = 50; 60 61 /* 62 * This is the default minimum command set supported by older 63 * devices. Anything conforming to 1.2 spec or later will get 64 * updated during init. 65 */ 66 static const uint8_t hci_cmds_v10[HCI_COMMANDS_SIZE] = { 67 0xff, 0xff, 0xff, 0x01, 0xfe, 0xff, 0xff, 0xff, 68 0xff, 0xff, 0xff, 0x7f, 0x32, 0x03, 0xb8, 0xfe, 69 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 70 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 71 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 72 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 73 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 74 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 75 }; 76 77 /* 78 * bluetooth unit functions 79 */ 80 static void hci_intr (void *); 81 82 struct hci_unit * 83 hci_attach(const struct hci_if *hci_if, device_t dev, uint16_t flags) 84 { 85 struct hci_unit *unit; 86 int s; 87 88 KASSERT(dev != NULL); 89 KASSERT(hci_if->enable != NULL); 90 KASSERT(hci_if->disable != NULL); 91 KASSERT(hci_if->output_cmd != NULL); 92 KASSERT(hci_if->output_acl != NULL); 93 KASSERT(hci_if->output_sco != NULL); 94 KASSERT(hci_if->get_stats != NULL); 95 96 unit = malloc(sizeof(struct hci_unit), M_BLUETOOTH, M_ZERO | M_WAITOK); 97 KASSERT(unit != NULL); 98 99 unit->hci_dev = dev; 100 unit->hci_if = hci_if; 101 unit->hci_flags = flags; 102 103 mutex_init(&unit->hci_devlock, MUTEX_DRIVER, hci_if->ipl); 104 105 MBUFQ_INIT(&unit->hci_eventq); 106 MBUFQ_INIT(&unit->hci_aclrxq); 107 MBUFQ_INIT(&unit->hci_scorxq); 108 MBUFQ_INIT(&unit->hci_cmdwait); 109 MBUFQ_INIT(&unit->hci_scodone); 110 111 TAILQ_INIT(&unit->hci_links); 112 LIST_INIT(&unit->hci_memos); 113 114 s = splsoftnet(); 115 SIMPLEQ_INSERT_TAIL(&hci_unit_list, unit, hci_next); 116 splx(s); 117 118 return unit; 119 } 120 121 void 122 hci_detach(struct hci_unit *unit) 123 { 124 int s; 125 126 s = splsoftnet(); 127 hci_disable(unit); 128 129 SIMPLEQ_REMOVE(&hci_unit_list, unit, hci_unit, hci_next); 130 splx(s); 131 132 mutex_destroy(&unit->hci_devlock); 133 free(unit, M_BLUETOOTH); 134 } 135 136 int 137 hci_enable(struct hci_unit *unit) 138 { 139 int err; 140 141 /* 142 * Bluetooth spec says that a device can accept one 143 * command on power up until they send a Command Status 144 * or Command Complete event with more information, but 145 * it seems that some devices cant and prefer to send a 146 * No-op Command Status packet when they are ready. 147 */ 148 unit->hci_num_cmd_pkts = (unit->hci_flags & BTF_POWER_UP_NOOP) ? 0 : 1; 149 unit->hci_num_acl_pkts = 0; 150 unit->hci_num_sco_pkts = 0; 151 152 /* 153 * only allow the basic packet types until 154 * the features report is in 155 */ 156 unit->hci_acl_mask = HCI_PKT_DM1 | HCI_PKT_DH1; 157 unit->hci_packet_type = unit->hci_acl_mask; 158 159 memcpy(unit->hci_cmds, hci_cmds_v10, HCI_COMMANDS_SIZE); 160 161 unit->hci_rxint = softint_establish(SOFTINT_NET, &hci_intr, unit); 162 if (unit->hci_rxint == NULL) 163 return EIO; 164 165 err = (*unit->hci_if->enable)(unit->hci_dev); 166 if (err) 167 goto bad1; 168 169 unit->hci_flags |= BTF_RUNNING; 170 171 /* 172 * Reset the device, this will trigger initialisation 173 * and wake us up. 174 */ 175 unit->hci_flags |= BTF_INIT; 176 177 err = hci_send_cmd(unit, HCI_CMD_RESET, NULL, 0); 178 if (err) 179 goto bad2; 180 181 while (unit->hci_flags & BTF_INIT) { 182 err = tsleep(unit, PWAIT | PCATCH, __func__, 5 * hz); 183 if (err) 184 goto bad2; 185 186 /* XXX 187 * "What If", while we were sleeping, the device 188 * was removed and detached? Ho Hum. 189 */ 190 } 191 192 /* 193 * Attach Bluetooth Device Hub 194 */ 195 unit->hci_bthub = config_found_ia(unit->hci_dev, 196 "btbus", &unit->hci_bdaddr, NULL); 197 198 return 0; 199 200 bad2: 201 (*unit->hci_if->disable)(unit->hci_dev); 202 unit->hci_flags &= ~BTF_RUNNING; 203 bad1: 204 softint_disestablish(unit->hci_rxint); 205 unit->hci_rxint = NULL; 206 207 return err; 208 } 209 210 void 211 hci_disable(struct hci_unit *unit) 212 { 213 struct hci_link *link, *next; 214 struct hci_memo *memo; 215 int acl; 216 217 if (unit->hci_bthub) { 218 config_detach(unit->hci_bthub, DETACH_FORCE); 219 unit->hci_bthub = NULL; 220 } 221 222 if (unit->hci_rxint) { 223 softint_disestablish(unit->hci_rxint); 224 unit->hci_rxint = NULL; 225 } 226 227 (*unit->hci_if->disable)(unit->hci_dev); 228 unit->hci_flags &= ~BTF_RUNNING; 229 230 /* 231 * close down any links, take care to close SCO first since 232 * they may depend on ACL links. 233 */ 234 for (acl = 0 ; acl < 2 ; acl++) { 235 next = TAILQ_FIRST(&unit->hci_links); 236 while ((link = next) != NULL) { 237 next = TAILQ_NEXT(link, hl_next); 238 if (acl || link->hl_type != HCI_LINK_ACL) 239 hci_link_free(link, ECONNABORTED); 240 } 241 } 242 243 while ((memo = LIST_FIRST(&unit->hci_memos)) != NULL) 244 hci_memo_free(memo); 245 246 /* (no need to hold hci_devlock, the driver is disabled) */ 247 248 MBUFQ_DRAIN(&unit->hci_eventq); 249 unit->hci_eventqlen = 0; 250 251 MBUFQ_DRAIN(&unit->hci_aclrxq); 252 unit->hci_aclrxqlen = 0; 253 254 MBUFQ_DRAIN(&unit->hci_scorxq); 255 unit->hci_scorxqlen = 0; 256 257 MBUFQ_DRAIN(&unit->hci_cmdwait); 258 MBUFQ_DRAIN(&unit->hci_scodone); 259 } 260 261 struct hci_unit * 262 hci_unit_lookup(bdaddr_t *addr) 263 { 264 struct hci_unit *unit; 265 266 SIMPLEQ_FOREACH(unit, &hci_unit_list, hci_next) { 267 if ((unit->hci_flags & BTF_UP) == 0) 268 continue; 269 270 if (bdaddr_same(&unit->hci_bdaddr, addr)) 271 break; 272 } 273 274 return unit; 275 } 276 277 /* 278 * update num_cmd_pkts and push on pending commands queue 279 */ 280 void 281 hci_num_cmds(struct hci_unit *unit, uint8_t num) 282 { 283 struct mbuf *m; 284 285 unit->hci_num_cmd_pkts = num; 286 287 while (unit->hci_num_cmd_pkts > 0 && MBUFQ_FIRST(&unit->hci_cmdwait)) { 288 MBUFQ_DEQUEUE(&unit->hci_cmdwait, m); 289 hci_output_cmd(unit, m); 290 } 291 } 292 293 /* 294 * construct and queue a HCI command packet 295 */ 296 int 297 hci_send_cmd(struct hci_unit *unit, uint16_t opcode, void *buf, uint8_t len) 298 { 299 struct mbuf *m; 300 hci_cmd_hdr_t *p; 301 302 KASSERT(unit != NULL); 303 304 m = m_gethdr(M_DONTWAIT, MT_DATA); 305 if (m == NULL) 306 return ENOMEM; 307 308 p = mtod(m, hci_cmd_hdr_t *); 309 p->type = HCI_CMD_PKT; 310 p->opcode = htole16(opcode); 311 p->length = len; 312 m->m_pkthdr.len = m->m_len = sizeof(hci_cmd_hdr_t); 313 314 if (len) { 315 KASSERT(buf != NULL); 316 317 m_copyback(m, sizeof(hci_cmd_hdr_t), len, buf); 318 if (m->m_pkthdr.len != (sizeof(hci_cmd_hdr_t) + len)) { 319 m_freem(m); 320 return ENOMEM; 321 } 322 } 323 324 DPRINTFN(2, "(%s) opcode (%3.3x|%4.4x)\n", device_xname(unit->hci_dev), 325 HCI_OGF(opcode), HCI_OCF(opcode)); 326 327 /* and send it on */ 328 if (unit->hci_num_cmd_pkts == 0) 329 MBUFQ_ENQUEUE(&unit->hci_cmdwait, m); 330 else 331 hci_output_cmd(unit, m); 332 333 return 0; 334 } 335 336 /* 337 * Incoming packet processing. Since the code is single threaded 338 * in any case (IPL_SOFTNET), we handle it all in one interrupt function 339 * picking our way through more important packets first so that hopefully 340 * we will never get clogged up with bulk data. 341 */ 342 static void 343 hci_intr(void *arg) 344 { 345 struct hci_unit *unit = arg; 346 struct mbuf *m; 347 348 another: 349 mutex_enter(&unit->hci_devlock); 350 351 if (unit->hci_eventqlen > 0) { 352 MBUFQ_DEQUEUE(&unit->hci_eventq, m); 353 unit->hci_eventqlen--; 354 mutex_exit(&unit->hci_devlock); 355 356 KASSERT(m != NULL); 357 358 DPRINTFN(10, "(%s) recv event, len = %d\n", 359 device_xname(unit->hci_dev), m->m_pkthdr.len); 360 361 m->m_flags |= M_LINK0; /* mark incoming packet */ 362 hci_mtap(m, unit); 363 hci_event(m, unit); 364 365 goto another; 366 } 367 368 if (unit->hci_scorxqlen > 0) { 369 MBUFQ_DEQUEUE(&unit->hci_scorxq, m); 370 unit->hci_scorxqlen--; 371 mutex_exit(&unit->hci_devlock); 372 373 KASSERT(m != NULL); 374 375 DPRINTFN(10, "(%s) recv SCO, len = %d\n", 376 device_xname(unit->hci_dev), m->m_pkthdr.len); 377 378 m->m_flags |= M_LINK0; /* mark incoming packet */ 379 hci_mtap(m, unit); 380 hci_sco_recv(m, unit); 381 382 goto another; 383 } 384 385 if (unit->hci_aclrxqlen > 0) { 386 MBUFQ_DEQUEUE(&unit->hci_aclrxq, m); 387 unit->hci_aclrxqlen--; 388 mutex_exit(&unit->hci_devlock); 389 390 KASSERT(m != NULL); 391 392 DPRINTFN(10, "(%s) recv ACL, len = %d\n", 393 device_xname(unit->hci_dev), m->m_pkthdr.len); 394 395 m->m_flags |= M_LINK0; /* mark incoming packet */ 396 hci_mtap(m, unit); 397 hci_acl_recv(m, unit); 398 399 goto another; 400 } 401 402 MBUFQ_DEQUEUE(&unit->hci_scodone, m); 403 if (m != NULL) { 404 struct hci_link *link; 405 406 mutex_exit(&unit->hci_devlock); 407 408 DPRINTFN(11, "(%s) complete SCO\n", 409 device_xname(unit->hci_dev)); 410 411 TAILQ_FOREACH(link, &unit->hci_links, hl_next) { 412 if (link == M_GETCTX(m, struct hci_link *)) { 413 hci_sco_complete(link, 1); 414 break; 415 } 416 } 417 418 unit->hci_num_sco_pkts++; 419 m_freem(m); 420 421 goto another; 422 } 423 424 mutex_exit(&unit->hci_devlock); 425 426 DPRINTFN(10, "done\n"); 427 } 428 429 /********************************************************************** 430 * 431 * IO routines 432 * 433 * input & complete routines will be called from device drivers, 434 * possibly in interrupt context. We return success or failure to 435 * enable proper accounting but we own the mbuf. 436 */ 437 438 bool 439 hci_input_event(struct hci_unit *unit, struct mbuf *m) 440 { 441 bool rv; 442 443 mutex_enter(&unit->hci_devlock); 444 445 if (unit->hci_eventqlen > hci_eventq_max || unit->hci_rxint == NULL) { 446 DPRINTF("(%s) dropped event packet.\n", device_xname(unit->hci_dev)); 447 m_freem(m); 448 rv = false; 449 } else { 450 unit->hci_eventqlen++; 451 MBUFQ_ENQUEUE(&unit->hci_eventq, m); 452 softint_schedule(unit->hci_rxint); 453 rv = true; 454 } 455 456 mutex_exit(&unit->hci_devlock); 457 return rv; 458 } 459 460 bool 461 hci_input_acl(struct hci_unit *unit, struct mbuf *m) 462 { 463 bool rv; 464 465 mutex_enter(&unit->hci_devlock); 466 467 if (unit->hci_aclrxqlen > hci_aclrxq_max || unit->hci_rxint == NULL) { 468 DPRINTF("(%s) dropped ACL packet.\n", device_xname(unit->hci_dev)); 469 m_freem(m); 470 rv = false; 471 } else { 472 unit->hci_aclrxqlen++; 473 MBUFQ_ENQUEUE(&unit->hci_aclrxq, m); 474 softint_schedule(unit->hci_rxint); 475 rv = true; 476 } 477 478 mutex_exit(&unit->hci_devlock); 479 return rv; 480 } 481 482 bool 483 hci_input_sco(struct hci_unit *unit, struct mbuf *m) 484 { 485 bool rv; 486 487 mutex_enter(&unit->hci_devlock); 488 489 if (unit->hci_scorxqlen > hci_scorxq_max || unit->hci_rxint == NULL) { 490 DPRINTF("(%s) dropped SCO packet.\n", device_xname(unit->hci_dev)); 491 m_freem(m); 492 rv = false; 493 } else { 494 unit->hci_scorxqlen++; 495 MBUFQ_ENQUEUE(&unit->hci_scorxq, m); 496 softint_schedule(unit->hci_rxint); 497 rv = true; 498 } 499 500 mutex_exit(&unit->hci_devlock); 501 return rv; 502 } 503 504 void 505 hci_output_cmd(struct hci_unit *unit, struct mbuf *m) 506 { 507 void *arg; 508 509 hci_mtap(m, unit); 510 511 DPRINTFN(10, "(%s) num_cmd_pkts=%d\n", device_xname(unit->hci_dev), 512 unit->hci_num_cmd_pkts); 513 514 unit->hci_num_cmd_pkts--; 515 516 /* 517 * If context is set, this was from a HCI raw socket 518 * and a record needs to be dropped from the sockbuf. 519 */ 520 arg = M_GETCTX(m, void *); 521 if (arg != NULL) 522 hci_drop(arg); 523 524 (*unit->hci_if->output_cmd)(unit->hci_dev, m); 525 } 526 527 void 528 hci_output_acl(struct hci_unit *unit, struct mbuf *m) 529 { 530 531 hci_mtap(m, unit); 532 533 DPRINTFN(10, "(%s) num_acl_pkts=%d\n", device_xname(unit->hci_dev), 534 unit->hci_num_acl_pkts); 535 536 unit->hci_num_acl_pkts--; 537 (*unit->hci_if->output_acl)(unit->hci_dev, m); 538 } 539 540 void 541 hci_output_sco(struct hci_unit *unit, struct mbuf *m) 542 { 543 544 hci_mtap(m, unit); 545 546 DPRINTFN(10, "(%s) num_sco_pkts=%d\n", device_xname(unit->hci_dev), 547 unit->hci_num_sco_pkts); 548 549 unit->hci_num_sco_pkts--; 550 (*unit->hci_if->output_sco)(unit->hci_dev, m); 551 } 552 553 bool 554 hci_complete_sco(struct hci_unit *unit, struct mbuf *m) 555 { 556 557 if (unit->hci_rxint == NULL) { 558 DPRINTFN(10, "(%s) complete SCO!\n", device_xname(unit->hci_dev)); 559 m_freem(m); 560 return false; 561 } 562 563 mutex_enter(&unit->hci_devlock); 564 565 MBUFQ_ENQUEUE(&unit->hci_scodone, m); 566 softint_schedule(unit->hci_rxint); 567 568 mutex_exit(&unit->hci_devlock); 569 return true; 570 } 571
Indexes created Wed Oct 15 16:09:53 GMT 2025