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/10.3/sys/dev/ipmi/ipmi.c 287435 2015-09-03 16:43:35Z 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/* 53 * Driver request structures are allocated on the stack via alloca() to 54 * avoid calling malloc(), especially for the watchdog handler. 55 * To avoid too much stack growth, a previously allocated structure can 56 * be reused via IPMI_INIT_DRIVER_REQUEST(), but the caller should ensure 57 * that there is adequate reply/request space in the original allocation. 58 */ 59#define IPMI_INIT_DRIVER_REQUEST(req, addr, cmd, reqlen, replylen) \ 60 bzero((req), sizeof(struct ipmi_request)); \ 61 ipmi_init_request((req), NULL, 0, (addr), (cmd), (reqlen), (replylen)) 62 63#define IPMI_ALLOC_DRIVER_REQUEST(req, addr, cmd, reqlen, replylen) \ 64 (req) = __builtin_alloca(sizeof(struct ipmi_request) + \ 65 (reqlen) + (replylen)); \ 66 IPMI_INIT_DRIVER_REQUEST((req), (addr), (cmd), (reqlen), \ 67 (replylen)) 68 69#ifdef IPMB 70static int ipmi_ipmb_checksum(u_char, int); 71static int ipmi_ipmb_send_message(device_t, u_char, u_char, u_char, 72 u_char, u_char, int) 73#endif 74 75static d_ioctl_t ipmi_ioctl; 76static d_poll_t ipmi_poll; 77static d_open_t ipmi_open; 78static void ipmi_dtor(void *arg); 79 80int ipmi_attached = 0; 81 82static int on = 1; 83static SYSCTL_NODE(_hw, OID_AUTO, ipmi, CTLFLAG_RD, 0, 84 "IPMI driver parameters"); 85SYSCTL_INT(_hw_ipmi, OID_AUTO, on, CTLFLAG_RW, 86 &on, 0, ""); 87 88static struct cdevsw ipmi_cdevsw = { 89 .d_version = D_VERSION, 90 .d_open = ipmi_open, 91 .d_ioctl = ipmi_ioctl, 92 .d_poll = ipmi_poll, 93 .d_name = "ipmi", 94}; 95 96static MALLOC_DEFINE(M_IPMI, "ipmi", "ipmi"); 97 98static int 99ipmi_open(struct cdev *cdev, int flags, int fmt, struct thread *td) 100{ 101 struct ipmi_device *dev; 102 struct ipmi_softc *sc; 103 int error; 104 105 if (!on) 106 return (ENOENT); 107 108 /* Initialize the per file descriptor data. */ 109 dev = malloc(sizeof(struct ipmi_device), M_IPMI, M_WAITOK | M_ZERO); 110 error = devfs_set_cdevpriv(dev, ipmi_dtor); 111 if (error) { 112 free(dev, M_IPMI); 113 return (error); 114 } 115 116 sc = cdev->si_drv1; 117 TAILQ_INIT(&dev->ipmi_completed_requests); 118 dev->ipmi_address = IPMI_BMC_SLAVE_ADDR; 119 dev->ipmi_lun = IPMI_BMC_SMS_LUN; 120 dev->ipmi_softc = sc; 121 IPMI_LOCK(sc); 122 sc->ipmi_opened++; 123 IPMI_UNLOCK(sc); 124 125 return (0); 126} 127 128static int 129ipmi_poll(struct cdev *cdev, int poll_events, struct thread *td) 130{ 131 struct ipmi_device *dev; 132 struct ipmi_softc *sc; 133 int revents = 0; 134 135 if (devfs_get_cdevpriv((void **)&dev)) 136 return (0); 137 138 sc = cdev->si_drv1; 139 IPMI_LOCK(sc); 140 if (poll_events & (POLLIN | POLLRDNORM)) { 141 if (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) 142 revents |= poll_events & (POLLIN | POLLRDNORM); 143 if (dev->ipmi_requests == 0) 144 revents |= POLLERR; 145 } 146 147 if (revents == 0) { 148 if (poll_events & (POLLIN | POLLRDNORM)) 149 selrecord(td, &dev->ipmi_select); 150 } 151 IPMI_UNLOCK(sc); 152 153 return (revents); 154} 155 156static void 157ipmi_purge_completed_requests(struct ipmi_device *dev) 158{ 159 struct ipmi_request *req; 160 161 while (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) { 162 req = TAILQ_FIRST(&dev->ipmi_completed_requests); 163 TAILQ_REMOVE(&dev->ipmi_completed_requests, req, ir_link); 164 dev->ipmi_requests--; 165 ipmi_free_request(req); 166 } 167} 168 169static void 170ipmi_dtor(void *arg) 171{ 172 struct ipmi_request *req, *nreq; 173 struct ipmi_device *dev; 174 struct ipmi_softc *sc; 175 176 dev = arg; 177 sc = dev->ipmi_softc; 178 179 IPMI_LOCK(sc); 180 if (dev->ipmi_requests) { 181 /* Throw away any pending requests for this device. */ 182 TAILQ_FOREACH_SAFE(req, &sc->ipmi_pending_requests, ir_link, 183 nreq) { 184 if (req->ir_owner == dev) { 185 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, 186 ir_link); 187 dev->ipmi_requests--; 188 ipmi_free_request(req); 189 } 190 } 191 192 /* Throw away any pending completed requests for this device. */ 193 ipmi_purge_completed_requests(dev); 194 195 /* 196 * If we still have outstanding requests, they must be stuck 197 * in an interface driver, so wait for those to drain. 198 */ 199 dev->ipmi_closing = 1; 200 while (dev->ipmi_requests > 0) { 201 msleep(&dev->ipmi_requests, &sc->ipmi_requests_lock, 202 PWAIT, "ipmidrain", 0); 203 ipmi_purge_completed_requests(dev); 204 } 205 } 206 sc->ipmi_opened--; 207 IPMI_UNLOCK(sc); 208 209 /* Cleanup. */ 210 free(dev, M_IPMI); 211} 212 213#ifdef IPMB 214static int 215ipmi_ipmb_checksum(u_char *data, int len) 216{ 217 u_char sum = 0; 218 219 for (; len; len--) { 220 sum += *data++; 221 } 222 return (-sum); 223} 224 225/* XXX: Needs work */ 226static int 227ipmi_ipmb_send_message(device_t dev, u_char channel, u_char netfn, 228 u_char command, u_char seq, u_char *data, int data_len) 229{ 230 struct ipmi_softc *sc = device_get_softc(dev); 231 struct ipmi_request *req; 232 u_char slave_addr = 0x52; 233 int error; 234 235 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 236 IPMI_SEND_MSG, data_len + 8, 0); 237 req->ir_request[0] = channel; 238 req->ir_request[1] = slave_addr; 239 req->ir_request[2] = IPMI_ADDR(netfn, 0); 240 req->ir_request[3] = ipmi_ipmb_checksum(&req->ir_request[1], 2); 241 req->ir_request[4] = sc->ipmi_address; 242 req->ir_request[5] = IPMI_ADDR(seq, sc->ipmi_lun); 243 req->ir_request[6] = command; 244 245 bcopy(data, &req->ir_request[7], data_len); 246 temp[data_len + 7] = ipmi_ipmb_checksum(&req->ir_request[4], 247 data_len + 3); 248 249 ipmi_submit_driver_request(sc, req); 250 error = req->ir_error; 251 252 return (error); 253} 254 255static int 256ipmi_handle_attn(struct ipmi_softc *sc) 257{ 258 struct ipmi_request *req; 259 int error; 260 261 device_printf(sc->ipmi_dev, "BMC has a message\n"); 262 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 263 IPMI_GET_MSG_FLAGS, 0, 1); 264 265 ipmi_submit_driver_request(sc, req); 266 267 if (req->ir_error == 0 && req->ir_compcode == 0) { 268 if (req->ir_reply[0] & IPMI_MSG_BUFFER_FULL) { 269 device_printf(sc->ipmi_dev, "message buffer full"); 270 } 271 if (req->ir_reply[0] & IPMI_WDT_PRE_TIMEOUT) { 272 device_printf(sc->ipmi_dev, 273 "watchdog about to go off"); 274 } 275 if (req->ir_reply[0] & IPMI_MSG_AVAILABLE) { 276 IPMI_ALLOC_DRIVER_REQUEST(req, 277 IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG, 0, 278 16); 279 280 device_printf(sc->ipmi_dev, "throw out message "); 281 dump_buf(temp, 16); 282 } 283 } 284 error = req->ir_error; 285 286 return (error); 287} 288#endif 289 290#ifdef IPMICTL_SEND_COMMAND_32 291#define PTRIN(p) ((void *)(uintptr_t)(p)) 292#define PTROUT(p) ((uintptr_t)(p)) 293#endif 294 295static int 296ipmi_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, 297 int flags, struct thread *td) 298{ 299 struct ipmi_softc *sc; 300 struct ipmi_device *dev; 301 struct ipmi_request *kreq; 302 struct ipmi_req *req = (struct ipmi_req *)data; 303 struct ipmi_recv *recv = (struct ipmi_recv *)data; 304 struct ipmi_addr addr; 305#ifdef IPMICTL_SEND_COMMAND_32 306 struct ipmi_req32 *req32 = (struct ipmi_req32 *)data; 307 struct ipmi_recv32 *recv32 = (struct ipmi_recv32 *)data; 308 union { 309 struct ipmi_req req; 310 struct ipmi_recv recv; 311 } thunk32; 312#endif 313 int error, len; 314 315 error = devfs_get_cdevpriv((void **)&dev); 316 if (error) 317 return (error); 318 319 sc = cdev->si_drv1; 320 321#ifdef IPMICTL_SEND_COMMAND_32 322 /* Convert 32-bit structures to native. */ 323 switch (cmd) { 324 case IPMICTL_SEND_COMMAND_32: 325 req = &thunk32.req; 326 req->addr = PTRIN(req32->addr); 327 req->addr_len = req32->addr_len; 328 req->msgid = req32->msgid; 329 req->msg.netfn = req32->msg.netfn; 330 req->msg.cmd = req32->msg.cmd; 331 req->msg.data_len = req32->msg.data_len; 332 req->msg.data = PTRIN(req32->msg.data); 333 break; 334 case IPMICTL_RECEIVE_MSG_TRUNC_32: 335 case IPMICTL_RECEIVE_MSG_32: 336 recv = &thunk32.recv; 337 recv->addr = PTRIN(recv32->addr); 338 recv->addr_len = recv32->addr_len; 339 recv->msg.data_len = recv32->msg.data_len; 340 recv->msg.data = PTRIN(recv32->msg.data); 341 break; 342 } 343#endif 344 345 switch (cmd) { 346#ifdef IPMICTL_SEND_COMMAND_32 347 case IPMICTL_SEND_COMMAND_32: 348#endif 349 case IPMICTL_SEND_COMMAND: 350 /* 351 * XXX: Need to add proper handling of this. 352 */ 353 error = copyin(req->addr, &addr, sizeof(addr)); 354 if (error) 355 return (error); 356 357 IPMI_LOCK(sc); 358 /* clear out old stuff in queue of stuff done */ 359 /* XXX: This seems odd. */ 360 while ((kreq = TAILQ_FIRST(&dev->ipmi_completed_requests))) { 361 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, 362 ir_link); 363 dev->ipmi_requests--; 364 ipmi_free_request(kreq); 365 } 366 IPMI_UNLOCK(sc); 367 368 kreq = ipmi_alloc_request(dev, req->msgid, 369 IPMI_ADDR(req->msg.netfn, 0), req->msg.cmd, 370 req->msg.data_len, IPMI_MAX_RX); 371 error = copyin(req->msg.data, kreq->ir_request, 372 req->msg.data_len); 373 if (error) { 374 ipmi_free_request(kreq); 375 return (error); 376 } 377 IPMI_LOCK(sc); 378 dev->ipmi_requests++; 379 error = sc->ipmi_enqueue_request(sc, kreq); 380 IPMI_UNLOCK(sc); 381 if (error) 382 return (error); 383 break; 384#ifdef IPMICTL_SEND_COMMAND_32 385 case IPMICTL_RECEIVE_MSG_TRUNC_32: 386 case IPMICTL_RECEIVE_MSG_32: 387#endif 388 case IPMICTL_RECEIVE_MSG_TRUNC: 389 case IPMICTL_RECEIVE_MSG: 390 error = copyin(recv->addr, &addr, sizeof(addr)); 391 if (error) 392 return (error); 393 394 IPMI_LOCK(sc); 395 kreq = TAILQ_FIRST(&dev->ipmi_completed_requests); 396 if (kreq == NULL) { 397 IPMI_UNLOCK(sc); 398 return (EAGAIN); 399 } 400 addr.channel = IPMI_BMC_CHANNEL; 401 /* XXX */ 402 recv->recv_type = IPMI_RESPONSE_RECV_TYPE; 403 recv->msgid = kreq->ir_msgid; 404 recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_addr) >> 2; 405 recv->msg.cmd = kreq->ir_command; 406 error = kreq->ir_error; 407 if (error) { 408 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, 409 ir_link); 410 dev->ipmi_requests--; 411 IPMI_UNLOCK(sc); 412 ipmi_free_request(kreq); 413 return (error); 414 } 415 len = kreq->ir_replylen + 1; 416 if (recv->msg.data_len < len && 417 (cmd == IPMICTL_RECEIVE_MSG 418#ifdef IPMICTL_RECEIVE_MSG_32 419 || cmd == IPMICTL_RECEIVE_MSG_32 420#endif 421 )) { 422 IPMI_UNLOCK(sc); 423 return (EMSGSIZE); 424 } 425 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); 426 dev->ipmi_requests--; 427 IPMI_UNLOCK(sc); 428 len = min(recv->msg.data_len, len); 429 recv->msg.data_len = len; 430 error = copyout(&addr, recv->addr,sizeof(addr)); 431 if (error == 0) 432 error = copyout(&kreq->ir_compcode, recv->msg.data, 1); 433 if (error == 0) 434 error = copyout(kreq->ir_reply, recv->msg.data + 1, 435 len - 1); 436 ipmi_free_request(kreq); 437 if (error) 438 return (error); 439 break; 440 case IPMICTL_SET_MY_ADDRESS_CMD: 441 IPMI_LOCK(sc); 442 dev->ipmi_address = *(int*)data; 443 IPMI_UNLOCK(sc); 444 break; 445 case IPMICTL_GET_MY_ADDRESS_CMD: 446 IPMI_LOCK(sc); 447 *(int*)data = dev->ipmi_address; 448 IPMI_UNLOCK(sc); 449 break; 450 case IPMICTL_SET_MY_LUN_CMD: 451 IPMI_LOCK(sc); 452 dev->ipmi_lun = *(int*)data & 0x3; 453 IPMI_UNLOCK(sc); 454 break; 455 case IPMICTL_GET_MY_LUN_CMD: 456 IPMI_LOCK(sc); 457 *(int*)data = dev->ipmi_lun; 458 IPMI_UNLOCK(sc); 459 break; 460 case IPMICTL_SET_GETS_EVENTS_CMD: 461 /* 462 device_printf(sc->ipmi_dev, 463 "IPMICTL_SET_GETS_EVENTS_CMD NA\n"); 464 */ 465 break; 466 case IPMICTL_REGISTER_FOR_CMD: 467 case IPMICTL_UNREGISTER_FOR_CMD: 468 return (EOPNOTSUPP); 469 default: 470 device_printf(sc->ipmi_dev, "Unknown IOCTL %lX\n", cmd); 471 return (ENOIOCTL); 472 } 473 474#ifdef IPMICTL_SEND_COMMAND_32 475 /* Update changed fields in 32-bit structures. */ 476 switch (cmd) { 477 case IPMICTL_RECEIVE_MSG_TRUNC_32: 478 case IPMICTL_RECEIVE_MSG_32: 479 recv32->recv_type = recv->recv_type; 480 recv32->msgid = recv->msgid; 481 recv32->msg.netfn = recv->msg.netfn; 482 recv32->msg.cmd = recv->msg.cmd; 483 recv32->msg.data_len = recv->msg.data_len; 484 break; 485 } 486#endif 487 return (0); 488} 489 490/* 491 * Request management. 492 */ 493 494static __inline void 495ipmi_init_request(struct ipmi_request *req, struct ipmi_device *dev, long msgid, 496 uint8_t addr, uint8_t command, size_t requestlen, size_t replylen) 497{ 498 499 req->ir_owner = dev; 500 req->ir_msgid = msgid; 501 req->ir_addr = addr; 502 req->ir_command = command; 503 if (requestlen) { 504 req->ir_request = (char *)&req[1]; 505 req->ir_requestlen = requestlen; 506 } 507 if (replylen) { 508 req->ir_reply = (char *)&req[1] + requestlen; 509 req->ir_replybuflen = replylen; 510 } 511} 512 513/* Allocate a new request with request and reply buffers. */ 514struct ipmi_request * 515ipmi_alloc_request(struct ipmi_device *dev, long msgid, uint8_t addr, 516 uint8_t command, size_t requestlen, size_t replylen) 517{ 518 struct ipmi_request *req; 519 520 req = malloc(sizeof(struct ipmi_request) + requestlen + replylen, 521 M_IPMI, M_WAITOK | M_ZERO); 522 ipmi_init_request(req, dev, msgid, addr, command, requestlen, replylen); 523 return (req); 524} 525 526/* Free a request no longer in use. */ 527void 528ipmi_free_request(struct ipmi_request *req) 529{ 530 531 free(req, M_IPMI); 532} 533 534/* Store a processed request on the appropriate completion queue. */ 535void 536ipmi_complete_request(struct ipmi_softc *sc, struct ipmi_request *req) 537{ 538 struct ipmi_device *dev; 539 540 IPMI_LOCK_ASSERT(sc); 541 542 /* 543 * Anonymous requests (from inside the driver) always have a 544 * waiter that we awaken. 545 */ 546 if (req->ir_owner == NULL) 547 wakeup(req); 548 else { 549 dev = req->ir_owner; 550 TAILQ_INSERT_TAIL(&dev->ipmi_completed_requests, req, ir_link); 551 selwakeup(&dev->ipmi_select); 552 if (dev->ipmi_closing) 553 wakeup(&dev->ipmi_requests); 554 } 555} 556 557/* Perform an internal driver request. */ 558int 559ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, 560 int timo) 561{ 562 563 return (sc->ipmi_driver_request(sc, req, timo)); 564} 565 566/* 567 * Helper routine for polled system interfaces that use 568 * ipmi_polled_enqueue_request() to queue requests. This request 569 * waits until there is a pending request and then returns the first 570 * request. If the driver is shutting down, it returns NULL. 571 */ 572struct ipmi_request * 573ipmi_dequeue_request(struct ipmi_softc *sc) 574{ 575 struct ipmi_request *req; 576 577 IPMI_LOCK_ASSERT(sc); 578 579 while (!sc->ipmi_detaching && TAILQ_EMPTY(&sc->ipmi_pending_requests)) 580 cv_wait(&sc->ipmi_request_added, &sc->ipmi_requests_lock); 581 if (sc->ipmi_detaching) 582 return (NULL); 583 584 req = TAILQ_FIRST(&sc->ipmi_pending_requests); 585 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, ir_link); 586 return (req); 587} 588 589/* Default implementation of ipmi_enqueue_request() for polled interfaces. */ 590int 591ipmi_polled_enqueue_request(struct ipmi_softc *sc, struct ipmi_request *req) 592{ 593 594 IPMI_LOCK_ASSERT(sc); 595 596 TAILQ_INSERT_TAIL(&sc->ipmi_pending_requests, req, ir_link); 597 cv_signal(&sc->ipmi_request_added); 598 return (0); 599} 600 601/* 602 * Watchdog event handler. 603 */ 604 605static int 606ipmi_set_watchdog(struct ipmi_softc *sc, unsigned int sec) 607{ 608 struct ipmi_request *req; 609 int error; 610 611 if (sec > 0xffff / 10) 612 return (EINVAL); 613 614 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 615 IPMI_SET_WDOG, 6, 0); 616 617 if (sec) { 618 req->ir_request[0] = IPMI_SET_WD_TIMER_DONT_STOP 619 | IPMI_SET_WD_TIMER_SMS_OS; 620 req->ir_request[1] = IPMI_SET_WD_ACTION_RESET; 621 req->ir_request[2] = 0; 622 req->ir_request[3] = 0; /* Timer use */ 623 req->ir_request[4] = (sec * 10) & 0xff; 624 req->ir_request[5] = (sec * 10) >> 8; 625 } else { 626 req->ir_request[0] = IPMI_SET_WD_TIMER_SMS_OS; 627 req->ir_request[1] = 0; 628 req->ir_request[2] = 0; 629 req->ir_request[3] = 0; /* Timer use */ 630 req->ir_request[4] = 0; 631 req->ir_request[5] = 0; 632 } 633 634 error = ipmi_submit_driver_request(sc, req, 0); 635 if (error) 636 device_printf(sc->ipmi_dev, "Failed to set watchdog\n"); 637 else if (sec) { 638 IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 639 IPMI_RESET_WDOG, 0, 0); 640 641 error = ipmi_submit_driver_request(sc, req, 0); 642 if (error) 643 device_printf(sc->ipmi_dev, 644 "Failed to reset watchdog\n"); 645 } 646 647 return (error); 648 /* 649 dump_watchdog(sc); 650 */ 651} 652 653static void 654ipmi_wd_event(void *arg, unsigned int cmd, int *error) 655{ 656 struct ipmi_softc *sc = arg; 657 unsigned int timeout; 658 int e; 659 660 if (dumping) 661 return; 662 663 cmd &= WD_INTERVAL; 664 if (cmd > 0 && cmd <= 63) { 665 timeout = ((uint64_t)1 << cmd) / 1000000000; 666 if (timeout == 0) 667 timeout = 1; 668 e = ipmi_set_watchdog(sc, timeout); 669 if (e == 0) { 670 *error = 0; 671 sc->ipmi_watchdog_active = 1; 672 } else 673 (void)ipmi_set_watchdog(sc, 0); 674 } else if (atomic_readandclear_int(&sc->ipmi_watchdog_active) != 0) { 675 e = ipmi_set_watchdog(sc, 0); 676 if (e != 0 && cmd == 0) 677 *error = EOPNOTSUPP; 678 } 679} 680 681static void 682ipmi_startup(void *arg) 683{ 684 struct ipmi_softc *sc = arg; 685 struct ipmi_request *req; 686 device_t dev; 687 int error, i; 688 689 config_intrhook_disestablish(&sc->ipmi_ich); 690 dev = sc->ipmi_dev; 691 692 /* Initialize interface-independent state. */ 693 mtx_init(&sc->ipmi_requests_lock, "ipmi requests", NULL, MTX_DEF); 694 mtx_init(&sc->ipmi_io_lock, "ipmi io", NULL, MTX_DEF); 695 cv_init(&sc->ipmi_request_added, "ipmireq"); 696 TAILQ_INIT(&sc->ipmi_pending_requests); 697 698 /* Initialize interface-dependent state. */ 699 error = sc->ipmi_startup(sc); 700 if (error) { 701 device_printf(dev, "Failed to initialize interface: %d\n", 702 error); 703 return; 704 } 705 706 /* Send a GET_DEVICE_ID request. */ 707 IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 708 IPMI_GET_DEVICE_ID, 0, 15); 709 710 error = ipmi_submit_driver_request(sc, req, MAX_TIMEOUT); 711 if (error == EWOULDBLOCK) { 712 device_printf(dev, "Timed out waiting for GET_DEVICE_ID\n"); 713 return; 714 } else if (error) { 715 device_printf(dev, "Failed GET_DEVICE_ID: %d\n", error); 716 return; 717 } else if (req->ir_compcode != 0) { 718 device_printf(dev, 719 "Bad completion code for GET_DEVICE_ID: %d\n", 720 req->ir_compcode); 721 return; 722 } else if (req->ir_replylen < 5) { 723 device_printf(dev, "Short reply for GET_DEVICE_ID: %d\n", 724 req->ir_replylen); 725 return; 726 } 727 728 device_printf(dev, "IPMI device rev. %d, firmware rev. %d.%d%d, " 729 "version %d.%d\n", 730 req->ir_reply[1] & 0x0f, 731 req->ir_reply[2] & 0x7f, req->ir_reply[3] >> 4, req->ir_reply[3] & 0x0f, 732 req->ir_reply[4] & 0x0f, req->ir_reply[4] >> 4); 733 734 IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 735 IPMI_CLEAR_FLAGS, 1, 0); 736 737 ipmi_submit_driver_request(sc, req, 0); 738 739 /* XXX: Magic numbers */ 740 if (req->ir_compcode == 0xc0) { 741 device_printf(dev, "Clear flags is busy\n"); 742 } 743 if (req->ir_compcode == 0xc1) { 744 device_printf(dev, "Clear flags illegal\n"); 745 } 746 747 for (i = 0; i < 8; i++) { 748 IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 749 IPMI_GET_CHANNEL_INFO, 1, 0); 750 req->ir_request[0] = i; 751 752 ipmi_submit_driver_request(sc, req, 0); 753 754 if (req->ir_compcode != 0) 755 break; 756 } 757 device_printf(dev, "Number of channels %d\n", i); 758 759 /* 760 * Probe for watchdog, but only for backends which support 761 * polled driver requests. 762 */ 763 if (sc->ipmi_driver_requests_polled) { 764 IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), 765 IPMI_GET_WDOG, 0, 0); 766 767 ipmi_submit_driver_request(sc, req, 0); 768 769 if (req->ir_compcode == 0x00) { 770 device_printf(dev, "Attached watchdog\n"); 771 /* register the watchdog event handler */ 772 sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER( 773 watchdog_list, ipmi_wd_event, sc, 0); 774 } 775 } 776 777 sc->ipmi_cdev = make_dev(&ipmi_cdevsw, device_get_unit(dev), 778 UID_ROOT, GID_OPERATOR, 0660, "ipmi%d", device_get_unit(dev)); 779 if (sc->ipmi_cdev == NULL) { 780 device_printf(dev, "Failed to create cdev\n"); 781 return; 782 } 783 sc->ipmi_cdev->si_drv1 = sc; 784} 785 786int 787ipmi_attach(device_t dev) 788{ 789 struct ipmi_softc *sc = device_get_softc(dev); 790 int error; 791 792 if (sc->ipmi_irq_res != NULL && sc->ipmi_intr != NULL) { 793 error = bus_setup_intr(dev, sc->ipmi_irq_res, INTR_TYPE_MISC, 794 NULL, sc->ipmi_intr, sc, &sc->ipmi_irq); 795 if (error) { 796 device_printf(dev, "can't set up interrupt\n"); 797 return (error); 798 } 799 } 800 801 bzero(&sc->ipmi_ich, sizeof(struct intr_config_hook)); 802 sc->ipmi_ich.ich_func = ipmi_startup; 803 sc->ipmi_ich.ich_arg = sc; 804 if (config_intrhook_establish(&sc->ipmi_ich) != 0) { 805 device_printf(dev, "can't establish configuration hook\n"); 806 return (ENOMEM); 807 } 808 809 ipmi_attached = 1; 810 return (0); 811} 812 813int 814ipmi_detach(device_t dev) 815{ 816 struct ipmi_softc *sc; 817 818 sc = device_get_softc(dev); 819 820 /* Fail if there are any open handles. */ 821 IPMI_LOCK(sc); 822 if (sc->ipmi_opened) { 823 IPMI_UNLOCK(sc); 824 return (EBUSY); 825 } 826 IPMI_UNLOCK(sc); 827 if (sc->ipmi_cdev) 828 destroy_dev(sc->ipmi_cdev); 829 830 /* Detach from watchdog handling and turn off watchdog. */ 831 if (sc->ipmi_watchdog_tag) { 832 EVENTHANDLER_DEREGISTER(watchdog_list, sc->ipmi_watchdog_tag); 833 ipmi_set_watchdog(sc, 0); 834 } 835 836 /* XXX: should use shutdown callout I think. */ 837 /* If the backend uses a kthread, shut it down. */ 838 IPMI_LOCK(sc); 839 sc->ipmi_detaching = 1; 840 if (sc->ipmi_kthread) { 841 cv_broadcast(&sc->ipmi_request_added); 842 msleep(sc->ipmi_kthread, &sc->ipmi_requests_lock, 0, 843 "ipmi_wait", 0); 844 } 845 IPMI_UNLOCK(sc); 846 if (sc->ipmi_irq) 847 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 848 849 ipmi_release_resources(dev); 850 mtx_destroy(&sc->ipmi_io_lock); 851 mtx_destroy(&sc->ipmi_requests_lock); 852 return (0); 853} 854 855void 856ipmi_release_resources(device_t dev) 857{ 858 struct ipmi_softc *sc; 859 int i; 860 861 sc = device_get_softc(dev); 862 if (sc->ipmi_irq) 863 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 864 if (sc->ipmi_irq_res) 865 bus_release_resource(dev, SYS_RES_IRQ, sc->ipmi_irq_rid, 866 sc->ipmi_irq_res); 867 for (i = 0; i < MAX_RES; i++) 868 if (sc->ipmi_io_res[i]) 869 bus_release_resource(dev, sc->ipmi_io_type, 870 sc->ipmi_io_rid + i, sc->ipmi_io_res[i]); 871} 872 873devclass_t ipmi_devclass; 874 875/* XXX: Why? */ 876static void 877ipmi_unload(void *arg) 878{ 879 device_t * devs; 880 int count; 881 int i; 882 883 if (devclass_get_devices(ipmi_devclass, &devs, &count) != 0) 884 return; 885 for (i = 0; i < count; i++) 886 device_delete_child(device_get_parent(devs[i]), devs[i]); 887 free(devs, M_TEMP); 888} 889SYSUNINIT(ipmi_unload, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipmi_unload, NULL); 890 891#ifdef IMPI_DEBUG 892static void 893dump_buf(u_char *data, int len) 894{ 895 char buf[20]; 896 char line[1024]; 897 char temp[30]; 898 int count = 0; 899 int i=0; 900 901 printf("Address %p len %d\n", data, len); 902 if (len > 256) 903 len = 256; 904 line[0] = '\000'; 905 for (; len > 0; len--, data++) { 906 sprintf(temp, "%02x ", *data); 907 strcat(line, temp); 908 if (*data >= ' ' && *data <= '~') 909 buf[count] = *data; 910 else if (*data >= 'A' && *data <= 'Z') 911 buf[count] = *data; 912 else 913 buf[count] = '.'; 914 if (++count == 16) { 915 buf[count] = '\000'; 916 count = 0; 917 printf(" %3x %s %s\n", i, line, buf); 918 i+=16; 919 line[0] = '\000'; 920 } 921 } 922 buf[count] = '\000'; 923 924 for (; count != 16; count++) { 925 strcat(line, " "); 926 } 927 printf(" %3x %s %s\n", i, line, buf); 928} 929#endif 930