Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/ipmi/ipmi.c
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1 /*- 2 * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/8.4/sys/dev/ipmi/ipmi.c 239921 2012-08-30 20:43:01Z jhb $"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bus.h> 33 #include <sys/condvar.h> 34 #include <sys/conf.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 #include <sys/poll.h> 39 #include <sys/rman.h> 40 #include <sys/selinfo.h> 41 #include <sys/sysctl.h> 42 #include <sys/watchdog.h> 43 44 #ifdef LOCAL_MODULE 45 #include <ipmi.h> 46 #include <ipmivars.h> 47 #else 48 #include <sys/ipmi.h> 49 #include <dev/ipmi/ipmivars.h> 50 #endif 51 52 #ifdef IPMB 53 static int ipmi_ipmb_checksum(u_char, int); 54 static int ipmi_ipmb_send_message(device_t, u_char, u_char, u_char, 55 u_char, u_char, int) 56 #endif 57 58 static d_ioctl_t ipmi_ioctl; 59 static d_poll_t ipmi_poll; 60 static d_open_t ipmi_open; 61 static void ipmi_dtor(void *arg); 62 63 int ipmi_attached = 0; 64 65 static int on = 1; 66 SYSCTL_NODE(_hw, OID_AUTO, ipmi, CTLFLAG_RD, 0, "IPMI driver parameters"); 67 SYSCTL_INT(_hw_ipmi, OID_AUTO, on, CTLFLAG_RW, 68 &on, 0, ""); 69 70 static struct cdevsw ipmi_cdevsw = { 71 .d_version = D_VERSION, 72 .d_open = ipmi_open, 73 .d_ioctl = ipmi_ioctl, 74 .d_poll = ipmi_poll, 75 .d_name = "ipmi", 76 }; 77 78 MALLOC_DEFINE(M_IPMI, "ipmi", "ipmi"); 79 80 static int 81 ipmi_open(struct cdev *cdev, int flags, int fmt, struct thread *td) 82 { 83 struct ipmi_device *dev; 84 struct ipmi_softc *sc; 85 int error; 86 87 if (!on) 88 return (ENOENT); 89 90 /* Initialize the per file descriptor data. */ 91 dev = malloc(sizeof(struct ipmi_device), M_IPMI, M_WAITOK | M_ZERO); 92 error = devfs_set_cdevpriv(dev, ipmi_dtor); 93 if (error) { 94 free(dev, M_IPMI); 95 return (error); 96 } 97 98 sc = cdev->si_drv1; 99 TAILQ_INIT(&dev->ipmi_completed_requests); 100 dev->ipmi_address = IPMI_BMC_SLAVE_ADDR; 101 dev->ipmi_lun = IPMI_BMC_SMS_LUN; 102 dev->ipmi_softc = sc; 103 IPMI_LOCK(sc); 104 sc->ipmi_opened++; 105 IPMI_UNLOCK(sc); 106 107 return (0); 108 } 109 110 static int 111 ipmi_poll(struct cdev *cdev, int poll_events, struct thread *td) 112 { 113 struct ipmi_device *dev; 114 struct ipmi_softc *sc; 115 int revents = 0; 116 117 if (devfs_get_cdevpriv((void **)&dev)) 118 return (0); 119 120 sc = cdev->si_drv1; 121 IPMI_LOCK(sc); 122 if (poll_events & (POLLIN | POLLRDNORM)) { 123 if (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) 124 revents |= poll_events & (POLLIN | POLLRDNORM); 125 if (dev->ipmi_requests == 0) 126 revents |= POLLERR; 127 } 128 129 if (revents == 0) { 130 if (poll_events & (POLLIN | POLLRDNORM)) 131 selrecord(td, &dev->ipmi_select); 132 } 133 IPMI_UNLOCK(sc); 134 135 return (revents); 136 } 137 138 static void 139 ipmi_purge_completed_requests(struct ipmi_device *dev) 140 { 141 struct ipmi_request *req; 142 143 while (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) { 144 req = TAILQ_FIRST(&dev->ipmi_completed_requests); 145 TAILQ_REMOVE(&dev->ipmi_completed_requests, req, ir_link); 146 dev->ipmi_requests--; 147 ipmi_free_request(req); 148 } 149 } 150 151 static void 152 ipmi_dtor(void *arg) 153 { 154 struct ipmi_request *req, *nreq; 155 struct ipmi_device *dev; 156 struct ipmi_softc *sc; 157 158 dev = arg; 159 sc = dev->ipmi_softc; 160 161 IPMI_LOCK(sc); 162 if (dev->ipmi_requests) { 163 /* Throw away any pending requests for this device. */ 164 TAILQ_FOREACH_SAFE(req, &sc->ipmi_pending_requests, ir_link, 165 nreq) { 166 if (req->ir_owner == dev) { 167 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, 168 ir_link); 169 dev->ipmi_requests--; 170 ipmi_free_request(req); 171 } 172 } 173 174 /* Throw away any pending completed requests for this device. */ 175 ipmi_purge_completed_requests(dev); 176 177 /* 178 * If we still have outstanding requests, they must be stuck 179 * in an interface driver, so wait for those to drain. 180 */ 181 dev->ipmi_closing = 1; 182 while (dev->ipmi_requests > 0) { 183 msleep(&dev->ipmi_requests, &sc->ipmi_lock, PWAIT, 184 "ipmidrain", 0); 185 ipmi_purge_completed_requests(dev); 186 } 187 } 188 sc->ipmi_opened--; 189 IPMI_UNLOCK(sc); 190 191 /* Cleanup. */ 192 free(dev, M_IPMI); 193 } 194 195 #ifdef IPMB 196 static int 197 ipmi_ipmb_checksum(u_char *data, int len) 198 { 199 u_char sum = 0; 200 201 for (; len; len--) { 202 sum += *data++; 203 } 204 return (-sum); 205 } 206 207 /* XXX: Needs work */ 208 static int 209 ipmi_ipmb_send_message(device_t dev, u_char channel, u_char netfn, 210 u_char command, u_char seq, u_char *data, int data_len) 211 { 212 struct ipmi_softc *sc = device_get_softc(dev); 213 struct ipmi_request *req; 214 u_char slave_addr = 0x52; 215 int error; 216 217 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 218 IPMI_SEND_MSG, data_len + 8, 0); 219 req->ir_request[0] = channel; 220 req->ir_request[1] = slave_addr; 221 req->ir_request[2] = IPMI_ADDR(netfn, 0); 222 req->ir_request[3] = ipmi_ipmb_checksum(&req->ir_request[1], 2); 223 req->ir_request[4] = sc->ipmi_address; 224 req->ir_request[5] = IPMI_ADDR(seq, sc->ipmi_lun); 225 req->ir_request[6] = command; 226 227 bcopy(data, &req->ir_request[7], data_len); 228 temp[data_len + 7] = ipmi_ipmb_checksum(&req->ir_request[4], 229 data_len + 3); 230 231 ipmi_submit_driver_request(sc, req); 232 error = req->ir_error; 233 ipmi_free_request(req); 234 235 return (error); 236 } 237 238 static int 239 ipmi_handle_attn(struct ipmi_softc *sc) 240 { 241 struct ipmi_request *req; 242 int error; 243 244 device_printf(sc->ipmi_dev, "BMC has a message\n"); 245 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 246 IPMI_GET_MSG_FLAGS, 0, 1); 247 248 ipmi_submit_driver_request(sc, req); 249 250 if (req->ir_error == 0 && req->ir_compcode == 0) { 251 if (req->ir_reply[0] & IPMI_MSG_BUFFER_FULL) { 252 device_printf(sc->ipmi_dev, "message buffer full"); 253 } 254 if (req->ir_reply[0] & IPMI_WDT_PRE_TIMEOUT) { 255 device_printf(sc->ipmi_dev, 256 "watchdog about to go off"); 257 } 258 if (req->ir_reply[0] & IPMI_MSG_AVAILABLE) { 259 ipmi_free_request(req); 260 261 req = ipmi_alloc_driver_request( 262 IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG, 0, 263 16); 264 265 device_printf(sc->ipmi_dev, "throw out message "); 266 dump_buf(temp, 16); 267 } 268 } 269 error = req->ir_error; 270 ipmi_free_request(req); 271 272 return (error); 273 } 274 #endif 275 276 #ifdef IPMICTL_SEND_COMMAND_32 277 #define PTRIN(p) ((void *)(uintptr_t)(p)) 278 #define PTROUT(p) ((uintptr_t)(p)) 279 #endif 280 281 static int 282 ipmi_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, 283 int flags, struct thread *td) 284 { 285 struct ipmi_softc *sc; 286 struct ipmi_device *dev; 287 struct ipmi_request *kreq; 288 struct ipmi_req *req = (struct ipmi_req *)data; 289 struct ipmi_recv *recv = (struct ipmi_recv *)data; 290 struct ipmi_addr addr; 291 #ifdef IPMICTL_SEND_COMMAND_32 292 struct ipmi_req32 *req32 = (struct ipmi_req32 *)data; 293 struct ipmi_recv32 *recv32 = (struct ipmi_recv32 *)data; 294 union { 295 struct ipmi_req req; 296 struct ipmi_recv recv; 297 } thunk32; 298 #endif 299 int error, len; 300 301 error = devfs_get_cdevpriv((void **)&dev); 302 if (error) 303 return (error); 304 305 sc = cdev->si_drv1; 306 307 #ifdef IPMICTL_SEND_COMMAND_32 308 /* Convert 32-bit structures to native. */ 309 switch (cmd) { 310 case IPMICTL_SEND_COMMAND_32: 311 req = &thunk32.req; 312 req->addr = PTRIN(req32->addr); 313 req->addr_len = req32->addr_len; 314 req->msgid = req32->msgid; 315 req->msg.netfn = req32->msg.netfn; 316 req->msg.cmd = req32->msg.cmd; 317 req->msg.data_len = req32->msg.data_len; 318 req->msg.data = PTRIN(req32->msg.data); 319 break; 320 case IPMICTL_RECEIVE_MSG_TRUNC_32: 321 case IPMICTL_RECEIVE_MSG_32: 322 recv = &thunk32.recv; 323 recv->addr = PTRIN(recv32->addr); 324 recv->addr_len = recv32->addr_len; 325 recv->msg.data_len = recv32->msg.data_len; 326 recv->msg.data = PTRIN(recv32->msg.data); 327 break; 328 } 329 #endif 330 331 switch (cmd) { 332 #ifdef IPMICTL_SEND_COMMAND_32 333 case IPMICTL_SEND_COMMAND_32: 334 #endif 335 case IPMICTL_SEND_COMMAND: 336 /* 337 * XXX: Need to add proper handling of this. 338 */ 339 error = copyin(req->addr, &addr, sizeof(addr)); 340 if (error) 341 return (error); 342 343 IPMI_LOCK(sc); 344 /* clear out old stuff in queue of stuff done */ 345 /* XXX: This seems odd. */ 346 while ((kreq = TAILQ_FIRST(&dev->ipmi_completed_requests))) { 347 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, 348 ir_link); 349 dev->ipmi_requests--; 350 ipmi_free_request(kreq); 351 } 352 IPMI_UNLOCK(sc); 353 354 kreq = ipmi_alloc_request(dev, req->msgid, 355 IPMI_ADDR(req->msg.netfn, 0), req->msg.cmd, 356 req->msg.data_len, IPMI_MAX_RX); 357 error = copyin(req->msg.data, kreq->ir_request, 358 req->msg.data_len); 359 if (error) { 360 ipmi_free_request(kreq); 361 return (error); 362 } 363 IPMI_LOCK(sc); 364 dev->ipmi_requests++; 365 error = sc->ipmi_enqueue_request(sc, kreq); 366 IPMI_UNLOCK(sc); 367 if (error) 368 return (error); 369 break; 370 #ifdef IPMICTL_SEND_COMMAND_32 371 case IPMICTL_RECEIVE_MSG_TRUNC_32: 372 case IPMICTL_RECEIVE_MSG_32: 373 #endif 374 case IPMICTL_RECEIVE_MSG_TRUNC: 375 case IPMICTL_RECEIVE_MSG: 376 error = copyin(recv->addr, &addr, sizeof(addr)); 377 if (error) 378 return (error); 379 380 IPMI_LOCK(sc); 381 kreq = TAILQ_FIRST(&dev->ipmi_completed_requests); 382 if (kreq == NULL) { 383 IPMI_UNLOCK(sc); 384 return (EAGAIN); 385 } 386 addr.channel = IPMI_BMC_CHANNEL; 387 /* XXX */ 388 recv->recv_type = IPMI_RESPONSE_RECV_TYPE; 389 recv->msgid = kreq->ir_msgid; 390 recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_addr) >> 2; 391 recv->msg.cmd = kreq->ir_command; 392 error = kreq->ir_error; 393 if (error) { 394 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, 395 ir_link); 396 dev->ipmi_requests--; 397 IPMI_UNLOCK(sc); 398 ipmi_free_request(kreq); 399 return (error); 400 } 401 len = kreq->ir_replylen + 1; 402 if (recv->msg.data_len < len && 403 (cmd == IPMICTL_RECEIVE_MSG 404 #ifdef IPMICTL_RECEIVE_MSG_32 405 || cmd == IPMICTL_RECEIVE_MSG_32 406 #endif 407 )) { 408 IPMI_UNLOCK(sc); 409 return (EMSGSIZE); 410 } 411 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); 412 dev->ipmi_requests--; 413 IPMI_UNLOCK(sc); 414 len = min(recv->msg.data_len, len); 415 recv->msg.data_len = len; 416 error = copyout(&addr, recv->addr,sizeof(addr)); 417 if (error == 0) 418 error = copyout(&kreq->ir_compcode, recv->msg.data, 1); 419 if (error == 0) 420 error = copyout(kreq->ir_reply, recv->msg.data + 1, 421 len - 1); 422 ipmi_free_request(kreq); 423 if (error) 424 return (error); 425 break; 426 case IPMICTL_SET_MY_ADDRESS_CMD: 427 IPMI_LOCK(sc); 428 dev->ipmi_address = *(int*)data; 429 IPMI_UNLOCK(sc); 430 break; 431 case IPMICTL_GET_MY_ADDRESS_CMD: 432 IPMI_LOCK(sc); 433 *(int*)data = dev->ipmi_address; 434 IPMI_UNLOCK(sc); 435 break; 436 case IPMICTL_SET_MY_LUN_CMD: 437 IPMI_LOCK(sc); 438 dev->ipmi_lun = *(int*)data & 0x3; 439 IPMI_UNLOCK(sc); 440 break; 441 case IPMICTL_GET_MY_LUN_CMD: 442 IPMI_LOCK(sc); 443 *(int*)data = dev->ipmi_lun; 444 IPMI_UNLOCK(sc); 445 break; 446 case IPMICTL_SET_GETS_EVENTS_CMD: 447 /* 448 device_printf(sc->ipmi_dev, 449 "IPMICTL_SET_GETS_EVENTS_CMD NA\n"); 450 */ 451 break; 452 case IPMICTL_REGISTER_FOR_CMD: 453 case IPMICTL_UNREGISTER_FOR_CMD: 454 return (EOPNOTSUPP); 455 default: 456 device_printf(sc->ipmi_dev, "Unknown IOCTL %lX\n", cmd); 457 return (ENOIOCTL); 458 } 459 460 #ifdef IPMICTL_SEND_COMMAND_32 461 /* Update changed fields in 32-bit structures. */ 462 switch (cmd) { 463 case IPMICTL_RECEIVE_MSG_TRUNC_32: 464 case IPMICTL_RECEIVE_MSG_32: 465 recv32->recv_type = recv->recv_type; 466 recv32->msgid = recv->msgid; 467 recv32->msg.netfn = recv->msg.netfn; 468 recv32->msg.cmd = recv->msg.cmd; 469 recv32->msg.data_len = recv->msg.data_len; 470 break; 471 } 472 #endif 473 return (0); 474 } 475 476 /* 477 * Request management. 478 */ 479 480 /* Allocate a new request with request and reply buffers. */ 481 struct ipmi_request * 482 ipmi_alloc_request(struct ipmi_device *dev, long msgid, uint8_t addr, 483 uint8_t command, size_t requestlen, size_t replylen) 484 { 485 struct ipmi_request *req; 486 487 req = malloc(sizeof(struct ipmi_request) + requestlen + replylen, 488 M_IPMI, M_WAITOK | M_ZERO); 489 req->ir_owner = dev; 490 req->ir_msgid = msgid; 491 req->ir_addr = addr; 492 req->ir_command = command; 493 if (requestlen) { 494 req->ir_request = (char *)&req[1]; 495 req->ir_requestlen = requestlen; 496 } 497 if (replylen) { 498 req->ir_reply = (char *)&req[1] + requestlen; 499 req->ir_replybuflen = replylen; 500 } 501 return (req); 502 } 503 504 /* Free a request no longer in use. */ 505 void 506 ipmi_free_request(struct ipmi_request *req) 507 { 508 509 free(req, M_IPMI); 510 } 511 512 /* Store a processed request on the appropriate completion queue. */ 513 void 514 ipmi_complete_request(struct ipmi_softc *sc, struct ipmi_request *req) 515 { 516 struct ipmi_device *dev; 517 518 IPMI_LOCK_ASSERT(sc); 519 520 /* 521 * Anonymous requests (from inside the driver) always have a 522 * waiter that we awaken. 523 */ 524 if (req->ir_owner == NULL) 525 wakeup(req); 526 else { 527 dev = req->ir_owner; 528 TAILQ_INSERT_TAIL(&dev->ipmi_completed_requests, req, ir_link); 529 selwakeup(&dev->ipmi_select); 530 if (dev->ipmi_closing) 531 wakeup(&dev->ipmi_requests); 532 } 533 } 534 535 /* Enqueue an internal driver request and wait until it is completed. */ 536 int 537 ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, 538 int timo) 539 { 540 int error; 541 542 IPMI_LOCK(sc); 543 error = sc->ipmi_enqueue_request(sc, req); 544 if (error == 0) 545 error = msleep(req, &sc->ipmi_lock, 0, "ipmireq", timo); 546 if (error == 0) 547 error = req->ir_error; 548 IPMI_UNLOCK(sc); 549 return (error); 550 } 551 552 /* 553 * Helper routine for polled system interfaces that use 554 * ipmi_polled_enqueue_request() to queue requests. This request 555 * waits until there is a pending request and then returns the first 556 * request. If the driver is shutting down, it returns NULL. 557 */ 558 struct ipmi_request * 559 ipmi_dequeue_request(struct ipmi_softc *sc) 560 { 561 struct ipmi_request *req; 562 563 IPMI_LOCK_ASSERT(sc); 564 565 while (!sc->ipmi_detaching && TAILQ_EMPTY(&sc->ipmi_pending_requests)) 566 cv_wait(&sc->ipmi_request_added, &sc->ipmi_lock); 567 if (sc->ipmi_detaching) 568 return (NULL); 569 570 req = TAILQ_FIRST(&sc->ipmi_pending_requests); 571 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, ir_link); 572 return (req); 573 } 574 575 /* Default implementation of ipmi_enqueue_request() for polled interfaces. */ 576 int 577 ipmi_polled_enqueue_request(struct ipmi_softc *sc, struct ipmi_request *req) 578 { 579 580 IPMI_LOCK_ASSERT(sc); 581 582 TAILQ_INSERT_TAIL(&sc->ipmi_pending_requests, req, ir_link); 583 cv_signal(&sc->ipmi_request_added); 584 return (0); 585 } 586 587 /* 588 * Watchdog event handler. 589 */ 590 591 static int 592 ipmi_set_watchdog(struct ipmi_softc *sc, unsigned int sec) 593 { 594 struct ipmi_request *req; 595 int error; 596 597 if (sec > 0xffff / 10) 598 return (EINVAL); 599 600 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 601 IPMI_SET_WDOG, 6, 0); 602 603 if (sec) { 604 req->ir_request[0] = IPMI_SET_WD_TIMER_DONT_STOP 605 | IPMI_SET_WD_TIMER_SMS_OS; 606 req->ir_request[1] = IPMI_SET_WD_ACTION_RESET; 607 req->ir_request[2] = 0; 608 req->ir_request[3] = 0; /* Timer use */ 609 req->ir_request[4] = (sec * 10) & 0xff; 610 req->ir_request[5] = (sec * 10) >> 8; 611 } else { 612 req->ir_request[0] = IPMI_SET_WD_TIMER_SMS_OS; 613 req->ir_request[1] = 0; 614 req->ir_request[2] = 0; 615 req->ir_request[3] = 0; /* Timer use */ 616 req->ir_request[4] = 0; 617 req->ir_request[5] = 0; 618 } 619 620 error = ipmi_submit_driver_request(sc, req, 0); 621 if (error) 622 device_printf(sc->ipmi_dev, "Failed to set watchdog\n"); 623 else if (sec) { 624 ipmi_free_request(req); 625 626 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 627 IPMI_RESET_WDOG, 0, 0); 628 629 error = ipmi_submit_driver_request(sc, req, 0); 630 if (error) 631 device_printf(sc->ipmi_dev, 632 "Failed to reset watchdog\n"); 633 } 634 635 ipmi_free_request(req); 636 return (error); 637 /* 638 dump_watchdog(sc); 639 */ 640 } 641 642 static void 643 ipmi_wd_event(void *arg, unsigned int cmd, int *error) 644 { 645 struct ipmi_softc *sc = arg; 646 unsigned int timeout; 647 int e; 648 649 cmd &= WD_INTERVAL; 650 if (cmd > 0 && cmd <= 63) { 651 timeout = ((uint64_t)1 << cmd) / 1000000000; 652 if (timeout == 0) 653 timeout = 1; 654 e = ipmi_set_watchdog(sc, timeout); 655 if (e == 0) { 656 *error = 0; 657 sc->ipmi_watchdog_active = 1; 658 } else 659 (void)ipmi_set_watchdog(sc, 0); 660 } else if (atomic_readandclear_int(&sc->ipmi_watchdog_active) != 0) { 661 e = ipmi_set_watchdog(sc, 0); 662 if (e != 0 && cmd == 0) 663 *error = EOPNOTSUPP; 664 } 665 } 666 667 static void 668 ipmi_startup(void *arg) 669 { 670 struct ipmi_softc *sc = arg; 671 struct ipmi_request *req; 672 device_t dev; 673 int error, i; 674 675 config_intrhook_disestablish(&sc->ipmi_ich); 676 dev = sc->ipmi_dev; 677 678 /* Initialize interface-independent state. */ 679 mtx_init(&sc->ipmi_lock, device_get_nameunit(dev), "ipmi", MTX_DEF); 680 cv_init(&sc->ipmi_request_added, "ipmireq"); 681 TAILQ_INIT(&sc->ipmi_pending_requests); 682 683 /* Initialize interface-dependent state. */ 684 error = sc->ipmi_startup(sc); 685 if (error) { 686 device_printf(dev, "Failed to initialize interface: %d\n", 687 error); 688 return; 689 } 690 691 /* Send a GET_DEVICE_ID request. */ 692 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 693 IPMI_GET_DEVICE_ID, 0, 15); 694 695 error = ipmi_submit_driver_request(sc, req, MAX_TIMEOUT); 696 if (error == EWOULDBLOCK) { 697 device_printf(dev, "Timed out waiting for GET_DEVICE_ID\n"); 698 ipmi_free_request(req); 699 return; 700 } else if (error) { 701 device_printf(dev, "Failed GET_DEVICE_ID: %d\n", error); 702 ipmi_free_request(req); 703 return; 704 } else if (req->ir_compcode != 0) { 705 device_printf(dev, 706 "Bad completion code for GET_DEVICE_ID: %d\n", 707 req->ir_compcode); 708 ipmi_free_request(req); 709 return; 710 } else if (req->ir_replylen < 5) { 711 device_printf(dev, "Short reply for GET_DEVICE_ID: %d\n", 712 req->ir_replylen); 713 ipmi_free_request(req); 714 return; 715 } 716 717 device_printf(dev, "IPMI device rev. %d, firmware rev. %d.%d%d, " 718 "version %d.%d\n", 719 req->ir_reply[1] & 0x0f, 720 req->ir_reply[2] & 0x7f, req->ir_reply[3] >> 4, req->ir_reply[3] & 0x0f, 721 req->ir_reply[4] & 0x0f, req->ir_reply[4] >> 4); 722 723 ipmi_free_request(req); 724 725 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 726 IPMI_CLEAR_FLAGS, 1, 0); 727 728 ipmi_submit_driver_request(sc, req, 0); 729 730 /* XXX: Magic numbers */ 731 if (req->ir_compcode == 0xc0) { 732 device_printf(dev, "Clear flags is busy\n"); 733 } 734 if (req->ir_compcode == 0xc1) { 735 device_printf(dev, "Clear flags illegal\n"); 736 } 737 ipmi_free_request(req); 738 739 for (i = 0; i < 8; i++) { 740 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 741 IPMI_GET_CHANNEL_INFO, 1, 0); 742 req->ir_request[0] = i; 743 744 ipmi_submit_driver_request(sc, req, 0); 745 746 if (req->ir_compcode != 0) { 747 ipmi_free_request(req); 748 break; 749 } 750 ipmi_free_request(req); 751 } 752 device_printf(dev, "Number of channels %d\n", i); 753 754 /* probe for watchdog */ 755 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 756 IPMI_GET_WDOG, 0, 0); 757 758 ipmi_submit_driver_request(sc, req, 0); 759 760 if (req->ir_compcode == 0x00) { 761 device_printf(dev, "Attached watchdog\n"); 762 /* register the watchdog event handler */ 763 sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER(watchdog_list, 764 ipmi_wd_event, sc, 0); 765 } 766 ipmi_free_request(req); 767 768 sc->ipmi_cdev = make_dev(&ipmi_cdevsw, device_get_unit(dev), 769 UID_ROOT, GID_OPERATOR, 0660, "ipmi%d", device_get_unit(dev)); 770 if (sc->ipmi_cdev == NULL) { 771 device_printf(dev, "Failed to create cdev\n"); 772 return; 773 } 774 sc->ipmi_cdev->si_drv1 = sc; 775 } 776 777 int 778 ipmi_attach(device_t dev) 779 { 780 struct ipmi_softc *sc = device_get_softc(dev); 781 int error; 782 783 if (sc->ipmi_irq_res != NULL && sc->ipmi_intr != NULL) { 784 error = bus_setup_intr(dev, sc->ipmi_irq_res, INTR_TYPE_MISC, 785 NULL, sc->ipmi_intr, sc, &sc->ipmi_irq); 786 if (error) { 787 device_printf(dev, "can't set up interrupt\n"); 788 return (error); 789 } 790 } 791 792 bzero(&sc->ipmi_ich, sizeof(struct intr_config_hook)); 793 sc->ipmi_ich.ich_func = ipmi_startup; 794 sc->ipmi_ich.ich_arg = sc; 795 if (config_intrhook_establish(&sc->ipmi_ich) != 0) { 796 device_printf(dev, "can't establish configuration hook\n"); 797 return (ENOMEM); 798 } 799 800 ipmi_attached = 1; 801 return (0); 802 } 803 804 int 805 ipmi_detach(device_t dev) 806 { 807 struct ipmi_softc *sc; 808 809 sc = device_get_softc(dev); 810 811 /* Fail if there are any open handles. */ 812 IPMI_LOCK(sc); 813 if (sc->ipmi_opened) { 814 IPMI_UNLOCK(sc); 815 return (EBUSY); 816 } 817 IPMI_UNLOCK(sc); 818 if (sc->ipmi_cdev) 819 destroy_dev(sc->ipmi_cdev); 820 821 /* Detach from watchdog handling and turn off watchdog. */ 822 if (sc->ipmi_watchdog_tag) { 823 EVENTHANDLER_DEREGISTER(watchdog_list, sc->ipmi_watchdog_tag); 824 ipmi_set_watchdog(sc, 0); 825 } 826 827 /* XXX: should use shutdown callout I think. */ 828 /* If the backend uses a kthread, shut it down. */ 829 IPMI_LOCK(sc); 830 sc->ipmi_detaching = 1; 831 if (sc->ipmi_kthread) { 832 cv_broadcast(&sc->ipmi_request_added); 833 msleep(sc->ipmi_kthread, &sc->ipmi_lock, 0, "ipmi_wait", 0); 834 } 835 IPMI_UNLOCK(sc); 836 if (sc->ipmi_irq) 837 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 838 839 ipmi_release_resources(dev); 840 mtx_destroy(&sc->ipmi_lock); 841 return (0); 842 } 843 844 void 845 ipmi_release_resources(device_t dev) 846 { 847 struct ipmi_softc *sc; 848 int i; 849 850 sc = device_get_softc(dev); 851 if (sc->ipmi_irq) 852 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 853 if (sc->ipmi_irq_res) 854 bus_release_resource(dev, SYS_RES_IRQ, sc->ipmi_irq_rid, 855 sc->ipmi_irq_res); 856 for (i = 0; i < MAX_RES; i++) 857 if (sc->ipmi_io_res[i]) 858 bus_release_resource(dev, sc->ipmi_io_type, 859 sc->ipmi_io_rid + i, sc->ipmi_io_res[i]); 860 } 861 862 devclass_t ipmi_devclass; 863 864 /* XXX: Why? */ 865 static void 866 ipmi_unload(void *arg) 867 { 868 device_t * devs; 869 int count; 870 int i; 871 872 if (devclass_get_devices(ipmi_devclass, &devs, &count) != 0) 873 return; 874 for (i = 0; i < count; i++) 875 device_delete_child(device_get_parent(devs[i]), devs[i]); 876 free(devs, M_TEMP); 877 } 878 SYSUNINIT(ipmi_unload, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipmi_unload, NULL); 879 880 #ifdef IMPI_DEBUG 881 static void 882 dump_buf(u_char *data, int len) 883 { 884 char buf[20]; 885 char line[1024]; 886 char temp[30]; 887 int count = 0; 888 int i=0; 889 890 printf("Address %p len %d\n", data, len); 891 if (len > 256) 892 len = 256; 893 line[0] = '\000'; 894 for (; len > 0; len--, data++) { 895 sprintf(temp, "%02x ", *data); 896 strcat(line, temp); 897 if (*data >= ' ' && *data <= '~') 898 buf[count] = *data; 899 else if (*data >= 'A' && *data <= 'Z') 900 buf[count] = *data; 901 else 902 buf[count] = '.'; 903 if (++count == 16) { 904 buf[count] = '\000'; 905 count = 0; 906 printf(" %3x %s %s\n", i, line, buf); 907 i+=16; 908 line[0] = '\000'; 909 } 910 } 911 buf[count] = '\000'; 912 913 for (; count != 16; count++) { 914 strcat(line, " "); 915 } 916 printf(" %3x %s %s\n", i, line, buf); 917 } 918 #endif
Cache object: 921faf484b6d76be1c14046e7ce3bc87
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