1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 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/eventhandler.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/mutex.h> 41 #include <sys/poll.h> 42 #include <sys/reboot.h> 43 #include <sys/rman.h> 44 #include <sys/selinfo.h> 45 #include <sys/sysctl.h> 46 #include <sys/watchdog.h> 47 48 #ifdef LOCAL_MODULE 49 #include <ipmi.h> 50 #include <ipmivars.h> 51 #else 52 #include <sys/ipmi.h> 53 #include <dev/ipmi/ipmivars.h> 54 #endif 55 56 #ifdef IPMICTL_SEND_COMMAND_32 57 #include <sys/abi_compat.h> 58 #endif 59 60 /* 61 * Driver request structures are allocated on the stack via alloca() to 62 * avoid calling malloc(), especially for the watchdog handler. 63 * To avoid too much stack growth, a previously allocated structure can 64 * be reused via IPMI_INIT_DRIVER_REQUEST(), but the caller should ensure 65 * that there is adequate reply/request space in the original allocation. 66 */ 67 #define IPMI_INIT_DRIVER_REQUEST(req, addr, cmd, reqlen, replylen) \ 68 bzero((req), sizeof(struct ipmi_request)); \ 69 ipmi_init_request((req), NULL, 0, (addr), (cmd), (reqlen), (replylen)) 70 71 #define IPMI_ALLOC_DRIVER_REQUEST(req, addr, cmd, reqlen, replylen) \ 72 (req) = __builtin_alloca(sizeof(struct ipmi_request) + \ 73 (reqlen) + (replylen)); \ 74 IPMI_INIT_DRIVER_REQUEST((req), (addr), (cmd), (reqlen), \ 75 (replylen)) 76 77 static d_ioctl_t ipmi_ioctl; 78 static d_poll_t ipmi_poll; 79 static d_open_t ipmi_open; 80 static void ipmi_dtor(void *arg); 81 82 int ipmi_attached = 0; 83 84 static int on = 1; 85 static bool wd_in_shutdown = false; 86 static int wd_timer_actions = IPMI_SET_WD_ACTION_POWER_CYCLE; 87 static int wd_shutdown_countdown = 0; /* sec */ 88 static int wd_startup_countdown = 0; /* sec */ 89 static int wd_pretimeout_countdown = 120; /* sec */ 90 static int cycle_wait = 10; /* sec */ 91 static int wd_init_enable = 1; 92 93 static SYSCTL_NODE(_hw, OID_AUTO, ipmi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 94 "IPMI driver parameters"); 95 SYSCTL_INT(_hw_ipmi, OID_AUTO, on, CTLFLAG_RWTUN, 96 &on, 0, ""); 97 SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_init_enable, CTLFLAG_RWTUN, 98 &wd_init_enable, 1, "Enable watchdog initialization"); 99 SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_timer_actions, CTLFLAG_RWTUN, 100 &wd_timer_actions, 0, 101 "IPMI watchdog timer actions (including pre-timeout interrupt)"); 102 SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_shutdown_countdown, CTLFLAG_RWTUN, 103 &wd_shutdown_countdown, 0, 104 "IPMI watchdog countdown for shutdown (seconds)"); 105 SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_startup_countdown, CTLFLAG_RDTUN, 106 &wd_startup_countdown, 0, 107 "IPMI watchdog countdown initialized during startup (seconds)"); 108 SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_pretimeout_countdown, CTLFLAG_RWTUN, 109 &wd_pretimeout_countdown, 0, 110 "IPMI watchdog pre-timeout countdown (seconds)"); 111 SYSCTL_INT(_hw_ipmi, OID_AUTO, cycle_wait, CTLFLAG_RWTUN, 112 &cycle_wait, 0, 113 "IPMI power cycle on reboot delay time (seconds)"); 114 115 static struct cdevsw ipmi_cdevsw = { 116 .d_version = D_VERSION, 117 .d_open = ipmi_open, 118 .d_ioctl = ipmi_ioctl, 119 .d_poll = ipmi_poll, 120 .d_name = "ipmi", 121 }; 122 123 static MALLOC_DEFINE(M_IPMI, "ipmi", "ipmi"); 124 125 static int 126 ipmi_open(struct cdev *cdev, int flags, int fmt, struct thread *td) 127 { 128 struct ipmi_device *dev; 129 struct ipmi_softc *sc; 130 int error; 131 132 if (!on) 133 return (ENOENT); 134 135 /* Initialize the per file descriptor data. */ 136 dev = malloc(sizeof(struct ipmi_device), M_IPMI, M_WAITOK | M_ZERO); 137 error = devfs_set_cdevpriv(dev, ipmi_dtor); 138 if (error) { 139 free(dev, M_IPMI); 140 return (error); 141 } 142 143 sc = cdev->si_drv1; 144 TAILQ_INIT(&dev->ipmi_completed_requests); 145 dev->ipmi_address = IPMI_BMC_SLAVE_ADDR; 146 dev->ipmi_lun = IPMI_BMC_SMS_LUN; 147 dev->ipmi_softc = sc; 148 IPMI_LOCK(sc); 149 sc->ipmi_opened++; 150 IPMI_UNLOCK(sc); 151 152 return (0); 153 } 154 155 static int 156 ipmi_poll(struct cdev *cdev, int poll_events, struct thread *td) 157 { 158 struct ipmi_device *dev; 159 struct ipmi_softc *sc; 160 int revents = 0; 161 162 if (devfs_get_cdevpriv((void **)&dev)) 163 return (0); 164 165 sc = cdev->si_drv1; 166 IPMI_LOCK(sc); 167 if (poll_events & (POLLIN | POLLRDNORM)) { 168 if (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) 169 revents |= poll_events & (POLLIN | POLLRDNORM); 170 if (dev->ipmi_requests == 0) 171 revents |= POLLERR; 172 } 173 174 if (revents == 0) { 175 if (poll_events & (POLLIN | POLLRDNORM)) 176 selrecord(td, &dev->ipmi_select); 177 } 178 IPMI_UNLOCK(sc); 179 180 return (revents); 181 } 182 183 static void 184 ipmi_purge_completed_requests(struct ipmi_device *dev) 185 { 186 struct ipmi_request *req; 187 188 while (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) { 189 req = TAILQ_FIRST(&dev->ipmi_completed_requests); 190 TAILQ_REMOVE(&dev->ipmi_completed_requests, req, ir_link); 191 dev->ipmi_requests--; 192 ipmi_free_request(req); 193 } 194 } 195 196 static void 197 ipmi_dtor(void *arg) 198 { 199 struct ipmi_request *req, *nreq; 200 struct ipmi_device *dev; 201 struct ipmi_softc *sc; 202 203 dev = arg; 204 sc = dev->ipmi_softc; 205 206 IPMI_LOCK(sc); 207 if (dev->ipmi_requests) { 208 /* Throw away any pending requests for this device. */ 209 TAILQ_FOREACH_SAFE(req, &sc->ipmi_pending_requests_highpri, ir_link, 210 nreq) { 211 if (req->ir_owner == dev) { 212 TAILQ_REMOVE(&sc->ipmi_pending_requests_highpri, req, 213 ir_link); 214 dev->ipmi_requests--; 215 ipmi_free_request(req); 216 } 217 } 218 TAILQ_FOREACH_SAFE(req, &sc->ipmi_pending_requests, ir_link, 219 nreq) { 220 if (req->ir_owner == dev) { 221 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, 222 ir_link); 223 dev->ipmi_requests--; 224 ipmi_free_request(req); 225 } 226 } 227 228 /* Throw away any pending completed requests for this device. */ 229 ipmi_purge_completed_requests(dev); 230 231 /* 232 * If we still have outstanding requests, they must be stuck 233 * in an interface driver, so wait for those to drain. 234 */ 235 dev->ipmi_closing = 1; 236 while (dev->ipmi_requests > 0) { 237 msleep(&dev->ipmi_requests, &sc->ipmi_requests_lock, 238 PWAIT, "ipmidrain", 0); 239 ipmi_purge_completed_requests(dev); 240 } 241 } 242 sc->ipmi_opened--; 243 IPMI_UNLOCK(sc); 244 245 /* Cleanup. */ 246 free(dev, M_IPMI); 247 } 248 249 static u_char 250 ipmi_ipmb_checksum(u_char *data, int len) 251 { 252 u_char sum = 0; 253 254 for (; len; len--) 255 sum += *data++; 256 return (-sum); 257 } 258 259 static int 260 ipmi_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, 261 int flags, struct thread *td) 262 { 263 struct ipmi_softc *sc; 264 struct ipmi_device *dev; 265 struct ipmi_request *kreq; 266 struct ipmi_req *req = (struct ipmi_req *)data; 267 struct ipmi_recv *recv = (struct ipmi_recv *)data; 268 struct ipmi_addr addr; 269 #ifdef IPMICTL_SEND_COMMAND_32 270 struct ipmi_req32 *req32 = (struct ipmi_req32 *)data; 271 struct ipmi_recv32 *recv32 = (struct ipmi_recv32 *)data; 272 union { 273 struct ipmi_req req; 274 struct ipmi_recv recv; 275 } thunk32; 276 #endif 277 int error, len; 278 279 error = devfs_get_cdevpriv((void **)&dev); 280 if (error) 281 return (error); 282 283 sc = cdev->si_drv1; 284 285 #ifdef IPMICTL_SEND_COMMAND_32 286 /* Convert 32-bit structures to native. */ 287 switch (cmd) { 288 case IPMICTL_SEND_COMMAND_32: 289 req = &thunk32.req; 290 req->addr = PTRIN(req32->addr); 291 req->addr_len = req32->addr_len; 292 req->msgid = req32->msgid; 293 req->msg.netfn = req32->msg.netfn; 294 req->msg.cmd = req32->msg.cmd; 295 req->msg.data_len = req32->msg.data_len; 296 req->msg.data = PTRIN(req32->msg.data); 297 break; 298 case IPMICTL_RECEIVE_MSG_TRUNC_32: 299 case IPMICTL_RECEIVE_MSG_32: 300 recv = &thunk32.recv; 301 recv->addr = PTRIN(recv32->addr); 302 recv->addr_len = recv32->addr_len; 303 recv->msg.data_len = recv32->msg.data_len; 304 recv->msg.data = PTRIN(recv32->msg.data); 305 break; 306 } 307 #endif 308 309 switch (cmd) { 310 #ifdef IPMICTL_SEND_COMMAND_32 311 case IPMICTL_SEND_COMMAND_32: 312 #endif 313 case IPMICTL_SEND_COMMAND: 314 error = copyin(req->addr, &addr, sizeof(addr)); 315 if (error) 316 return (error); 317 318 if (addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { 319 struct ipmi_system_interface_addr *saddr = 320 (struct ipmi_system_interface_addr *)&addr; 321 322 kreq = ipmi_alloc_request(dev, req->msgid, 323 IPMI_ADDR(req->msg.netfn, saddr->lun & 0x3), 324 req->msg.cmd, req->msg.data_len, IPMI_MAX_RX); 325 error = copyin(req->msg.data, kreq->ir_request, 326 req->msg.data_len); 327 if (error) { 328 ipmi_free_request(kreq); 329 return (error); 330 } 331 IPMI_LOCK(sc); 332 dev->ipmi_requests++; 333 error = sc->ipmi_enqueue_request(sc, kreq); 334 IPMI_UNLOCK(sc); 335 if (error) 336 return (error); 337 break; 338 } 339 340 /* Special processing for IPMB commands */ 341 struct ipmi_ipmb_addr *iaddr = (struct ipmi_ipmb_addr *)&addr; 342 343 IPMI_ALLOC_DRIVER_REQUEST(kreq, IPMI_ADDR(IPMI_APP_REQUEST, 0), 344 IPMI_SEND_MSG, req->msg.data_len + 8, IPMI_MAX_RX); 345 /* Construct the SEND MSG header */ 346 kreq->ir_request[0] = iaddr->channel; 347 kreq->ir_request[1] = iaddr->slave_addr; 348 kreq->ir_request[2] = IPMI_ADDR(req->msg.netfn, iaddr->lun); 349 kreq->ir_request[3] = 350 ipmi_ipmb_checksum(&kreq->ir_request[1], 2); 351 kreq->ir_request[4] = dev->ipmi_address; 352 kreq->ir_request[5] = IPMI_ADDR(0, dev->ipmi_lun); 353 kreq->ir_request[6] = req->msg.cmd; 354 /* Copy the message data */ 355 if (req->msg.data_len > 0) { 356 error = copyin(req->msg.data, &kreq->ir_request[7], 357 req->msg.data_len); 358 if (error != 0) 359 return (error); 360 } 361 kreq->ir_request[req->msg.data_len + 7] = 362 ipmi_ipmb_checksum(&kreq->ir_request[4], 363 req->msg.data_len + 3); 364 error = ipmi_submit_driver_request(sc, kreq, MAX_TIMEOUT); 365 if (error != 0) 366 return (error); 367 368 kreq = ipmi_alloc_request(dev, req->msgid, 369 IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG, 370 0, IPMI_MAX_RX); 371 kreq->ir_ipmb = true; 372 kreq->ir_ipmb_addr = IPMI_ADDR(req->msg.netfn, 0); 373 kreq->ir_ipmb_command = req->msg.cmd; 374 IPMI_LOCK(sc); 375 dev->ipmi_requests++; 376 error = sc->ipmi_enqueue_request(sc, kreq); 377 IPMI_UNLOCK(sc); 378 if (error != 0) 379 return (error); 380 break; 381 #ifdef IPMICTL_SEND_COMMAND_32 382 case IPMICTL_RECEIVE_MSG_TRUNC_32: 383 case IPMICTL_RECEIVE_MSG_32: 384 #endif 385 case IPMICTL_RECEIVE_MSG_TRUNC: 386 case IPMICTL_RECEIVE_MSG: 387 error = copyin(recv->addr, &addr, sizeof(addr)); 388 if (error) 389 return (error); 390 391 IPMI_LOCK(sc); 392 kreq = TAILQ_FIRST(&dev->ipmi_completed_requests); 393 if (kreq == NULL) { 394 IPMI_UNLOCK(sc); 395 return (EAGAIN); 396 } 397 if (kreq->ir_error != 0) { 398 error = kreq->ir_error; 399 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, 400 ir_link); 401 dev->ipmi_requests--; 402 IPMI_UNLOCK(sc); 403 ipmi_free_request(kreq); 404 return (error); 405 } 406 407 recv->recv_type = IPMI_RESPONSE_RECV_TYPE; 408 recv->msgid = kreq->ir_msgid; 409 if (kreq->ir_ipmb) { 410 addr.channel = IPMI_IPMB_CHANNEL; 411 recv->msg.netfn = 412 IPMI_REPLY_ADDR(kreq->ir_ipmb_addr) >> 2; 413 recv->msg.cmd = kreq->ir_ipmb_command; 414 /* Get the compcode of response */ 415 kreq->ir_compcode = kreq->ir_reply[6]; 416 /* Move the reply head past response header */ 417 kreq->ir_reply += 7; 418 len = kreq->ir_replylen - 7; 419 } else { 420 addr.channel = IPMI_BMC_CHANNEL; 421 recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_addr) >> 2; 422 recv->msg.cmd = kreq->ir_command; 423 len = kreq->ir_replylen + 1; 424 } 425 426 if (recv->msg.data_len < len && 427 (cmd == IPMICTL_RECEIVE_MSG 428 #ifdef IPMICTL_RECEIVE_MSG_32 429 || cmd == IPMICTL_RECEIVE_MSG_32 430 #endif 431 )) { 432 IPMI_UNLOCK(sc); 433 return (EMSGSIZE); 434 } 435 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); 436 dev->ipmi_requests--; 437 IPMI_UNLOCK(sc); 438 len = min(recv->msg.data_len, len); 439 recv->msg.data_len = len; 440 error = copyout(&addr, recv->addr,sizeof(addr)); 441 if (error == 0) 442 error = copyout(&kreq->ir_compcode, recv->msg.data, 1); 443 if (error == 0) 444 error = copyout(kreq->ir_reply, recv->msg.data + 1, 445 len - 1); 446 ipmi_free_request(kreq); 447 if (error) 448 return (error); 449 break; 450 case IPMICTL_SET_MY_ADDRESS_CMD: 451 IPMI_LOCK(sc); 452 dev->ipmi_address = *(int*)data; 453 IPMI_UNLOCK(sc); 454 break; 455 case IPMICTL_GET_MY_ADDRESS_CMD: 456 IPMI_LOCK(sc); 457 *(int*)data = dev->ipmi_address; 458 IPMI_UNLOCK(sc); 459 break; 460 case IPMICTL_SET_MY_LUN_CMD: 461 IPMI_LOCK(sc); 462 dev->ipmi_lun = *(int*)data & 0x3; 463 IPMI_UNLOCK(sc); 464 break; 465 case IPMICTL_GET_MY_LUN_CMD: 466 IPMI_LOCK(sc); 467 *(int*)data = dev->ipmi_lun; 468 IPMI_UNLOCK(sc); 469 break; 470 case IPMICTL_SET_GETS_EVENTS_CMD: 471 /* 472 device_printf(sc->ipmi_dev, 473 "IPMICTL_SET_GETS_EVENTS_CMD NA\n"); 474 */ 475 break; 476 case IPMICTL_REGISTER_FOR_CMD: 477 case IPMICTL_UNREGISTER_FOR_CMD: 478 return (EOPNOTSUPP); 479 default: 480 device_printf(sc->ipmi_dev, "Unknown IOCTL %lX\n", cmd); 481 return (ENOIOCTL); 482 } 483 484 #ifdef IPMICTL_SEND_COMMAND_32 485 /* Update changed fields in 32-bit structures. */ 486 switch (cmd) { 487 case IPMICTL_RECEIVE_MSG_TRUNC_32: 488 case IPMICTL_RECEIVE_MSG_32: 489 recv32->recv_type = recv->recv_type; 490 recv32->msgid = recv->msgid; 491 recv32->msg.netfn = recv->msg.netfn; 492 recv32->msg.cmd = recv->msg.cmd; 493 recv32->msg.data_len = recv->msg.data_len; 494 break; 495 } 496 #endif 497 return (0); 498 } 499 500 /* 501 * Request management. 502 */ 503 504 __inline void 505 ipmi_init_request(struct ipmi_request *req, struct ipmi_device *dev, long msgid, 506 uint8_t addr, uint8_t command, size_t requestlen, size_t replylen) 507 { 508 509 req->ir_owner = dev; 510 req->ir_msgid = msgid; 511 req->ir_addr = addr; 512 req->ir_command = command; 513 if (requestlen) { 514 req->ir_request = (char *)&req[1]; 515 req->ir_requestlen = requestlen; 516 } 517 if (replylen) { 518 req->ir_reply = (char *)&req[1] + requestlen; 519 req->ir_replybuflen = replylen; 520 } 521 } 522 523 /* Allocate a new request with request and reply buffers. */ 524 struct ipmi_request * 525 ipmi_alloc_request(struct ipmi_device *dev, long msgid, uint8_t addr, 526 uint8_t command, size_t requestlen, size_t replylen) 527 { 528 struct ipmi_request *req; 529 530 req = malloc(sizeof(struct ipmi_request) + requestlen + replylen, 531 M_IPMI, M_WAITOK | M_ZERO); 532 ipmi_init_request(req, dev, msgid, addr, command, requestlen, replylen); 533 return (req); 534 } 535 536 /* Free a request no longer in use. */ 537 void 538 ipmi_free_request(struct ipmi_request *req) 539 { 540 541 free(req, M_IPMI); 542 } 543 544 /* Store a processed request on the appropriate completion queue. */ 545 void 546 ipmi_complete_request(struct ipmi_softc *sc, struct ipmi_request *req) 547 { 548 struct ipmi_device *dev; 549 550 IPMI_LOCK_ASSERT(sc); 551 552 /* 553 * Anonymous requests (from inside the driver) always have a 554 * waiter that we awaken. 555 */ 556 if (req->ir_owner == NULL) 557 wakeup(req); 558 else { 559 dev = req->ir_owner; 560 TAILQ_INSERT_TAIL(&dev->ipmi_completed_requests, req, ir_link); 561 selwakeup(&dev->ipmi_select); 562 if (dev->ipmi_closing) 563 wakeup(&dev->ipmi_requests); 564 } 565 } 566 567 /* Perform an internal driver request. */ 568 int 569 ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, 570 int timo) 571 { 572 573 return (sc->ipmi_driver_request(sc, req, timo)); 574 } 575 576 /* 577 * Helper routine for polled system interfaces that use 578 * ipmi_polled_enqueue_request() to queue requests. This request 579 * waits until there is a pending request and then returns the first 580 * request. If the driver is shutting down, it returns NULL. 581 */ 582 struct ipmi_request * 583 ipmi_dequeue_request(struct ipmi_softc *sc) 584 { 585 struct ipmi_request *req; 586 587 IPMI_LOCK_ASSERT(sc); 588 589 while (!sc->ipmi_detaching && TAILQ_EMPTY(&sc->ipmi_pending_requests) && 590 TAILQ_EMPTY(&sc->ipmi_pending_requests_highpri)) 591 cv_wait(&sc->ipmi_request_added, &sc->ipmi_requests_lock); 592 if (sc->ipmi_detaching) 593 return (NULL); 594 595 req = TAILQ_FIRST(&sc->ipmi_pending_requests_highpri); 596 if (req != NULL) 597 TAILQ_REMOVE(&sc->ipmi_pending_requests_highpri, req, ir_link); 598 else { 599 req = TAILQ_FIRST(&sc->ipmi_pending_requests); 600 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, ir_link); 601 } 602 return (req); 603 } 604 605 /* Default implementation of ipmi_enqueue_request() for polled interfaces. */ 606 int 607 ipmi_polled_enqueue_request(struct ipmi_softc *sc, struct ipmi_request *req) 608 { 609 610 IPMI_LOCK_ASSERT(sc); 611 612 TAILQ_INSERT_TAIL(&sc->ipmi_pending_requests, req, ir_link); 613 cv_signal(&sc->ipmi_request_added); 614 return (0); 615 } 616 617 int 618 ipmi_polled_enqueue_request_highpri(struct ipmi_softc *sc, struct ipmi_request *req) 619 { 620 621 IPMI_LOCK_ASSERT(sc); 622 623 TAILQ_INSERT_TAIL(&sc->ipmi_pending_requests_highpri, req, ir_link); 624 cv_signal(&sc->ipmi_request_added); 625 return (0); 626 } 627 628 /* 629 * Watchdog event handler. 630 */ 631 632 static int 633 ipmi_reset_watchdog(struct ipmi_softc *sc) 634 { 635 struct ipmi_request *req; 636 int error; 637 638 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 639 IPMI_RESET_WDOG, 0, 0); 640 error = ipmi_submit_driver_request(sc, req, 0); 641 if (error) { 642 device_printf(sc->ipmi_dev, "Failed to reset watchdog\n"); 643 } else if (req->ir_compcode == 0x80) { 644 error = ENOENT; 645 } else if (req->ir_compcode != 0) { 646 device_printf(sc->ipmi_dev, "Watchdog reset returned 0x%x\n", 647 req->ir_compcode); 648 error = EINVAL; 649 } 650 return (error); 651 } 652 653 static int 654 ipmi_set_watchdog(struct ipmi_softc *sc, unsigned int sec) 655 { 656 struct ipmi_request *req; 657 int error; 658 659 if (sec > 0xffff / 10) 660 return (EINVAL); 661 662 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 663 IPMI_SET_WDOG, 6, 0); 664 if (sec) { 665 req->ir_request[0] = IPMI_SET_WD_TIMER_DONT_STOP 666 | IPMI_SET_WD_TIMER_SMS_OS; 667 req->ir_request[1] = (wd_timer_actions & 0xff); 668 req->ir_request[2] = min(0xff, 669 min(wd_pretimeout_countdown, (sec + 2) / 4)); 670 req->ir_request[3] = 0; /* Timer use */ 671 req->ir_request[4] = (sec * 10) & 0xff; 672 req->ir_request[5] = (sec * 10) >> 8; 673 } else { 674 req->ir_request[0] = IPMI_SET_WD_TIMER_SMS_OS; 675 req->ir_request[1] = 0; 676 req->ir_request[2] = 0; 677 req->ir_request[3] = 0; /* Timer use */ 678 req->ir_request[4] = 0; 679 req->ir_request[5] = 0; 680 } 681 error = ipmi_submit_driver_request(sc, req, 0); 682 if (error) { 683 device_printf(sc->ipmi_dev, "Failed to set watchdog\n"); 684 } else if (req->ir_compcode != 0) { 685 device_printf(sc->ipmi_dev, "Watchdog set returned 0x%x\n", 686 req->ir_compcode); 687 error = EINVAL; 688 } 689 return (error); 690 } 691 692 static void 693 ipmi_wd_event(void *arg, unsigned int cmd, int *error) 694 { 695 struct ipmi_softc *sc = arg; 696 unsigned int timeout; 697 int e; 698 699 /* Ignore requests while disabled. */ 700 if (!on) 701 return; 702 703 /* 704 * To prevent infinite hangs, we don't let anyone pat or change 705 * the watchdog when we're shutting down. (See ipmi_shutdown_event().) 706 * However, we do want to keep patting the watchdog while we are doing 707 * a coredump. 708 */ 709 if (wd_in_shutdown) { 710 if (dumping && sc->ipmi_watchdog_active) 711 ipmi_reset_watchdog(sc); 712 return; 713 } 714 715 cmd &= WD_INTERVAL; 716 if (cmd > 0 && cmd <= 63) { 717 timeout = ((uint64_t)1 << cmd) / 1000000000; 718 if (timeout == 0) 719 timeout = 1; 720 if (timeout != sc->ipmi_watchdog_active || 721 wd_timer_actions != sc->ipmi_watchdog_actions || 722 wd_pretimeout_countdown != sc->ipmi_watchdog_pretimeout) { 723 e = ipmi_set_watchdog(sc, timeout); 724 if (e == 0) { 725 sc->ipmi_watchdog_active = timeout; 726 sc->ipmi_watchdog_actions = wd_timer_actions; 727 sc->ipmi_watchdog_pretimeout = wd_pretimeout_countdown; 728 } else { 729 (void)ipmi_set_watchdog(sc, 0); 730 sc->ipmi_watchdog_active = 0; 731 sc->ipmi_watchdog_actions = 0; 732 sc->ipmi_watchdog_pretimeout = 0; 733 } 734 } 735 if (sc->ipmi_watchdog_active != 0) { 736 e = ipmi_reset_watchdog(sc); 737 if (e == 0) { 738 *error = 0; 739 } else { 740 (void)ipmi_set_watchdog(sc, 0); 741 sc->ipmi_watchdog_active = 0; 742 sc->ipmi_watchdog_actions = 0; 743 sc->ipmi_watchdog_pretimeout = 0; 744 } 745 } 746 } else if (atomic_readandclear_int(&sc->ipmi_watchdog_active) != 0) { 747 sc->ipmi_watchdog_actions = 0; 748 sc->ipmi_watchdog_pretimeout = 0; 749 750 e = ipmi_set_watchdog(sc, 0); 751 if (e != 0 && cmd == 0) 752 *error = EOPNOTSUPP; 753 } 754 } 755 756 static void 757 ipmi_shutdown_event(void *arg, unsigned int cmd, int *error) 758 { 759 struct ipmi_softc *sc = arg; 760 761 /* Ignore event if disabled. */ 762 if (!on) 763 return; 764 765 /* 766 * Positive wd_shutdown_countdown value will re-arm watchdog; 767 * Zero value in wd_shutdown_countdown will disable watchdog; 768 * Negative value in wd_shutdown_countdown will keep existing state; 769 * 770 * Revert to using a power cycle to ensure that the watchdog will 771 * do something useful here. Having the watchdog send an NMI 772 * instead is useless during shutdown, and might be ignored if an 773 * NMI already triggered. 774 */ 775 776 wd_in_shutdown = true; 777 if (wd_shutdown_countdown == 0) { 778 /* disable watchdog */ 779 ipmi_set_watchdog(sc, 0); 780 sc->ipmi_watchdog_active = 0; 781 } else if (wd_shutdown_countdown > 0) { 782 /* set desired action and time, and, reset watchdog */ 783 wd_timer_actions = IPMI_SET_WD_ACTION_POWER_CYCLE; 784 ipmi_set_watchdog(sc, wd_shutdown_countdown); 785 sc->ipmi_watchdog_active = wd_shutdown_countdown; 786 ipmi_reset_watchdog(sc); 787 } 788 } 789 790 static void 791 ipmi_power_cycle(void *arg, int howto) 792 { 793 struct ipmi_softc *sc = arg; 794 struct ipmi_request *req; 795 796 /* 797 * Ignore everything except power cycling requests 798 */ 799 if ((howto & RB_POWERCYCLE) == 0) 800 return; 801 802 device_printf(sc->ipmi_dev, "Power cycling using IPMI\n"); 803 804 /* 805 * Send a CHASSIS_CONTROL command to the CHASSIS device, subcommand 2 806 * as described in IPMI v2.0 spec section 28.3. 807 */ 808 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_CHASSIS_REQUEST, 0), 809 IPMI_CHASSIS_CONTROL, 1, 0); 810 req->ir_request[0] = IPMI_CC_POWER_CYCLE; 811 812 ipmi_submit_driver_request(sc, req, MAX_TIMEOUT); 813 814 if (req->ir_error != 0 || req->ir_compcode != 0) { 815 device_printf(sc->ipmi_dev, "Power cycling via IPMI failed code %#x %#x\n", 816 req->ir_error, req->ir_compcode); 817 return; 818 } 819 820 /* 821 * BMCs are notoriously slow, give it cycle_wait seconds for the power 822 * down leg of the power cycle. If that fails, fallback to the next 823 * hanlder in the shutdown_final chain and/or the platform failsafe. 824 */ 825 DELAY(cycle_wait * 1000 * 1000); 826 device_printf(sc->ipmi_dev, "Power cycling via IPMI timed out\n"); 827 } 828 829 static void 830 ipmi_startup(void *arg) 831 { 832 struct ipmi_softc *sc = arg; 833 struct ipmi_request *req; 834 device_t dev; 835 int error, i; 836 837 config_intrhook_disestablish(&sc->ipmi_ich); 838 dev = sc->ipmi_dev; 839 840 /* Initialize interface-independent state. */ 841 mtx_init(&sc->ipmi_requests_lock, "ipmi requests", NULL, MTX_DEF); 842 mtx_init(&sc->ipmi_io_lock, "ipmi io", NULL, MTX_DEF); 843 cv_init(&sc->ipmi_request_added, "ipmireq"); 844 TAILQ_INIT(&sc->ipmi_pending_requests_highpri); 845 TAILQ_INIT(&sc->ipmi_pending_requests); 846 847 /* Initialize interface-dependent state. */ 848 error = sc->ipmi_startup(sc); 849 if (error) { 850 device_printf(dev, "Failed to initialize interface: %d\n", 851 error); 852 return; 853 } 854 855 /* Send a GET_DEVICE_ID request. */ 856 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 857 IPMI_GET_DEVICE_ID, 0, 15); 858 859 error = ipmi_submit_driver_request(sc, req, MAX_TIMEOUT); 860 if (error == EWOULDBLOCK) { 861 device_printf(dev, "Timed out waiting for GET_DEVICE_ID\n"); 862 return; 863 } else if (error) { 864 device_printf(dev, "Failed GET_DEVICE_ID: %d\n", error); 865 return; 866 } else if (req->ir_compcode != 0) { 867 device_printf(dev, 868 "Bad completion code for GET_DEVICE_ID: %d\n", 869 req->ir_compcode); 870 return; 871 } else if (req->ir_replylen < 5) { 872 device_printf(dev, "Short reply for GET_DEVICE_ID: %d\n", 873 req->ir_replylen); 874 return; 875 } 876 877 device_printf(dev, "IPMI device rev. %d, firmware rev. %d.%d%d, " 878 "version %d.%d, device support mask %#x\n", 879 req->ir_reply[1] & 0x0f, 880 req->ir_reply[2] & 0x7f, req->ir_reply[3] >> 4, req->ir_reply[3] & 0x0f, 881 req->ir_reply[4] & 0x0f, req->ir_reply[4] >> 4, req->ir_reply[5]); 882 883 sc->ipmi_dev_support = req->ir_reply[5]; 884 885 IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 886 IPMI_CLEAR_FLAGS, 1, 0); 887 888 ipmi_submit_driver_request(sc, req, 0); 889 890 /* XXX: Magic numbers */ 891 if (req->ir_compcode == 0xc0) { 892 device_printf(dev, "Clear flags is busy\n"); 893 } 894 if (req->ir_compcode == 0xc1) { 895 device_printf(dev, "Clear flags illegal\n"); 896 } 897 898 for (i = 0; i < 8; i++) { 899 IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 900 IPMI_GET_CHANNEL_INFO, 1, 0); 901 req->ir_request[0] = i; 902 903 error = ipmi_submit_driver_request(sc, req, 0); 904 905 if (error != 0 || req->ir_compcode != 0) 906 break; 907 } 908 device_printf(dev, "Number of channels %d\n", i); 909 910 /* 911 * Probe for watchdog, but only for backends which support 912 * polled driver requests. 913 */ 914 if (wd_init_enable && sc->ipmi_driver_requests_polled) { 915 IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 916 IPMI_GET_WDOG, 0, 0); 917 918 error = ipmi_submit_driver_request(sc, req, 0); 919 920 if (error == 0 && req->ir_compcode == 0x00) { 921 device_printf(dev, "Attached watchdog\n"); 922 /* register the watchdog event handler */ 923 sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER( 924 watchdog_list, ipmi_wd_event, sc, 0); 925 sc->ipmi_shutdown_tag = EVENTHANDLER_REGISTER( 926 shutdown_pre_sync, ipmi_shutdown_event, 927 sc, 0); 928 } 929 } 930 931 sc->ipmi_cdev = make_dev(&ipmi_cdevsw, device_get_unit(dev), 932 UID_ROOT, GID_OPERATOR, 0660, "ipmi%d", device_get_unit(dev)); 933 if (sc->ipmi_cdev == NULL) { 934 device_printf(dev, "Failed to create cdev\n"); 935 return; 936 } 937 sc->ipmi_cdev->si_drv1 = sc; 938 939 /* 940 * Set initial watchdog state. If desired, set an initial 941 * watchdog on startup. Or, if the watchdog device is 942 * disabled, clear any existing watchdog. 943 */ 944 if (on && wd_startup_countdown > 0) { 945 if (ipmi_set_watchdog(sc, wd_startup_countdown) == 0 && 946 ipmi_reset_watchdog(sc) == 0) { 947 sc->ipmi_watchdog_active = wd_startup_countdown; 948 sc->ipmi_watchdog_actions = wd_timer_actions; 949 sc->ipmi_watchdog_pretimeout = wd_pretimeout_countdown; 950 } else 951 (void)ipmi_set_watchdog(sc, 0); 952 ipmi_reset_watchdog(sc); 953 } else if (!on) 954 (void)ipmi_set_watchdog(sc, 0); 955 /* 956 * Power cycle the system off using IPMI. We use last - 2 since we don't 957 * handle all the other kinds of reboots. We'll let others handle them. 958 * We only try to do this if the BMC supports the Chassis device. 959 */ 960 if (sc->ipmi_dev_support & IPMI_ADS_CHASSIS) { 961 device_printf(dev, "Establishing power cycle handler\n"); 962 sc->ipmi_power_cycle_tag = EVENTHANDLER_REGISTER(shutdown_final, 963 ipmi_power_cycle, sc, SHUTDOWN_PRI_LAST - 2); 964 } 965 } 966 967 int 968 ipmi_attach(device_t dev) 969 { 970 struct ipmi_softc *sc = device_get_softc(dev); 971 int error; 972 973 if (sc->ipmi_irq_res != NULL && sc->ipmi_intr != NULL) { 974 error = bus_setup_intr(dev, sc->ipmi_irq_res, INTR_TYPE_MISC, 975 NULL, sc->ipmi_intr, sc, &sc->ipmi_irq); 976 if (error) { 977 device_printf(dev, "can't set up interrupt\n"); 978 return (error); 979 } 980 } 981 982 bzero(&sc->ipmi_ich, sizeof(struct intr_config_hook)); 983 sc->ipmi_ich.ich_func = ipmi_startup; 984 sc->ipmi_ich.ich_arg = sc; 985 if (config_intrhook_establish(&sc->ipmi_ich) != 0) { 986 device_printf(dev, "can't establish configuration hook\n"); 987 return (ENOMEM); 988 } 989 990 ipmi_attached = 1; 991 return (0); 992 } 993 994 int 995 ipmi_detach(device_t dev) 996 { 997 struct ipmi_softc *sc; 998 999 sc = device_get_softc(dev); 1000 1001 /* Fail if there are any open handles. */ 1002 IPMI_LOCK(sc); 1003 if (sc->ipmi_opened) { 1004 IPMI_UNLOCK(sc); 1005 return (EBUSY); 1006 } 1007 IPMI_UNLOCK(sc); 1008 if (sc->ipmi_cdev) 1009 destroy_dev(sc->ipmi_cdev); 1010 1011 /* Detach from watchdog handling and turn off watchdog. */ 1012 if (sc->ipmi_shutdown_tag) 1013 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, 1014 sc->ipmi_shutdown_tag); 1015 if (sc->ipmi_watchdog_tag) { 1016 EVENTHANDLER_DEREGISTER(watchdog_list, sc->ipmi_watchdog_tag); 1017 ipmi_set_watchdog(sc, 0); 1018 } 1019 1020 /* Detach from shutdown handling for power cycle reboot */ 1021 if (sc->ipmi_power_cycle_tag) 1022 EVENTHANDLER_DEREGISTER(shutdown_final, sc->ipmi_power_cycle_tag); 1023 1024 /* XXX: should use shutdown callout I think. */ 1025 /* If the backend uses a kthread, shut it down. */ 1026 IPMI_LOCK(sc); 1027 sc->ipmi_detaching = 1; 1028 if (sc->ipmi_kthread) { 1029 cv_broadcast(&sc->ipmi_request_added); 1030 msleep(sc->ipmi_kthread, &sc->ipmi_requests_lock, 0, 1031 "ipmi_wait", 0); 1032 } 1033 IPMI_UNLOCK(sc); 1034 if (sc->ipmi_irq) 1035 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 1036 1037 ipmi_release_resources(dev); 1038 mtx_destroy(&sc->ipmi_io_lock); 1039 mtx_destroy(&sc->ipmi_requests_lock); 1040 return (0); 1041 } 1042 1043 void 1044 ipmi_release_resources(device_t dev) 1045 { 1046 struct ipmi_softc *sc; 1047 int i; 1048 1049 sc = device_get_softc(dev); 1050 if (sc->ipmi_irq) 1051 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 1052 if (sc->ipmi_irq_res) 1053 bus_release_resource(dev, SYS_RES_IRQ, sc->ipmi_irq_rid, 1054 sc->ipmi_irq_res); 1055 for (i = 0; i < MAX_RES; i++) 1056 if (sc->ipmi_io_res[i]) 1057 bus_release_resource(dev, sc->ipmi_io_type, 1058 sc->ipmi_io_rid + i, sc->ipmi_io_res[i]); 1059 } 1060 1061 /* XXX: Why? */ 1062 static void 1063 ipmi_unload(void *arg) 1064 { 1065 device_t * devs; 1066 int count; 1067 int i; 1068 1069 if (devclass_get_devices(devclass_find("ipmi"), &devs, &count) != 0) 1070 return; 1071 for (i = 0; i < count; i++) 1072 device_delete_child(device_get_parent(devs[i]), devs[i]); 1073 free(devs, M_TEMP); 1074 } 1075 SYSUNINIT(ipmi_unload, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipmi_unload, NULL); 1076 1077 #ifdef IMPI_DEBUG 1078 static void 1079 dump_buf(u_char *data, int len) 1080 { 1081 char buf[20]; 1082 char line[1024]; 1083 char temp[30]; 1084 int count = 0; 1085 int i=0; 1086 1087 printf("Address %p len %d\n", data, len); 1088 if (len > 256) 1089 len = 256; 1090 line[0] = '\000'; 1091 for (; len > 0; len--, data++) { 1092 sprintf(temp, "%02x ", *data); 1093 strcat(line, temp); 1094 if (*data >= ' ' && *data <= '~') 1095 buf[count] = *data; 1096 else if (*data >= 'A' && *data <= 'Z') 1097 buf[count] = *data; 1098 else 1099 buf[count] = '.'; 1100 if (++count == 16) { 1101 buf[count] = '\000'; 1102 count = 0; 1103 printf(" %3x %s %s\n", i, line, buf); 1104 i+=16; 1105 line[0] = '\000'; 1106 } 1107 } 1108 buf[count] = '\000'; 1109 1110 for (; count != 16; count++) { 1111 strcat(line, " "); 1112 } 1113 printf(" %3x %s %s\n", i, line, buf); 1114 } 1115 #endif 1116