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("$FreeBSD$"); 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 d_close_t ipmi_close; 62 63 int ipmi_attached = 0; 64 65 #define IPMI_MINOR 0 66 67 static int on = 1; 68 SYSCTL_NODE(_hw, OID_AUTO, ipmi, CTLFLAG_RD, 0, "IPMI driver parameters"); 69 SYSCTL_INT(_hw_ipmi, OID_AUTO, on, CTLFLAG_RW, 70 &on, 0, ""); 71 72 static struct cdevsw ipmi_cdevsw = { 73 .d_version = D_VERSION, 74 .d_open = ipmi_open, 75 .d_close = ipmi_close, 76 .d_ioctl = ipmi_ioctl, 77 .d_poll = ipmi_poll, 78 .d_name = "ipmi", 79 }; 80 81 MALLOC_DEFINE(M_IPMI, "ipmi", "ipmi"); 82 83 static int 84 ipmi_open(struct cdev *cdev, int flags, int fmt, struct thread *td) 85 { 86 struct ipmi_device *dev; 87 struct ipmi_softc *sc; 88 89 if (!on) 90 return (ENOENT); 91 92 dev = cdev->si_drv1; 93 sc = dev->ipmi_softc; 94 IPMI_LOCK(sc); 95 if (dev->ipmi_open) { 96 IPMI_UNLOCK(sc); 97 return (EBUSY); 98 } 99 dev->ipmi_open = 1; 100 IPMI_UNLOCK(sc); 101 102 return (0); 103 } 104 105 static int 106 ipmi_poll(struct cdev *cdev, int poll_events, struct thread *td) 107 { 108 struct ipmi_device *dev; 109 struct ipmi_softc *sc; 110 int revents = 0; 111 112 dev = cdev->si_drv1; 113 sc = dev->ipmi_softc; 114 115 IPMI_LOCK(sc); 116 if (poll_events & (POLLIN | POLLRDNORM)) { 117 if (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) 118 revents |= poll_events & (POLLIN | POLLRDNORM); 119 if (dev->ipmi_requests == 0) 120 revents |= POLLERR; 121 } 122 123 if (revents == 0) { 124 if (poll_events & (POLLIN | POLLRDNORM)) 125 selrecord(td, &dev->ipmi_select); 126 } 127 IPMI_UNLOCK(sc); 128 129 return (revents); 130 } 131 132 static void 133 ipmi_purge_completed_requests(struct ipmi_device *dev) 134 { 135 struct ipmi_request *req; 136 137 while (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) { 138 req = TAILQ_FIRST(&dev->ipmi_completed_requests); 139 TAILQ_REMOVE(&dev->ipmi_completed_requests, req, ir_link); 140 dev->ipmi_requests--; 141 ipmi_free_request(req); 142 } 143 } 144 145 static int 146 ipmi_close(struct cdev *cdev, int flags, int fmt, struct thread *td) 147 { 148 struct ipmi_request *req, *nreq; 149 struct ipmi_device *dev; 150 struct ipmi_softc *sc; 151 #ifdef CLONING 152 int bit; 153 #endif 154 155 dev = cdev->si_drv1; 156 sc = dev->ipmi_softc; 157 158 IPMI_LOCK(sc); 159 if (dev->ipmi_requests) { 160 /* Throw away any pending requests for this device. */ 161 TAILQ_FOREACH_SAFE(req, &sc->ipmi_pending_requests, ir_link, 162 nreq) { 163 if (req->ir_owner == dev) { 164 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, 165 ir_link); 166 dev->ipmi_requests--; 167 ipmi_free_request(req); 168 } 169 } 170 171 /* Throw away any pending completed requests for this device. */ 172 ipmi_purge_completed_requests(dev); 173 174 /* 175 * If we still have outstanding requests, they must be stuck 176 * in an interface driver, so wait for those to drain. 177 */ 178 dev->ipmi_closing = 1; 179 while (dev->ipmi_requests > 0) { 180 msleep(&dev->ipmi_requests, &sc->ipmi_lock, PWAIT, 181 "ipmidrain", 0); 182 ipmi_purge_completed_requests(dev); 183 } 184 } 185 186 #ifdef CLONING 187 /* Detach this sub-device from the main driver. */ 188 bit = minor(cdev) % 32; 189 sc->ipmi_cdev_mask &= ~(1 << bit); 190 TAILQ_REMOVE(&sc->ipmi_cdevs, dev, ipmi_link); 191 IPMI_UNLOCK(sc); 192 193 /* Cleanup. */ 194 cdev->si_drv1 = NULL; 195 free(dev, M_IPMI); 196 destroy_dev(cdev); 197 #else 198 dev->ipmi_open = 0; 199 IPMI_UNLOCK(sc); 200 #endif 201 202 return (0); 203 } 204 205 #ifdef IPMB 206 static int 207 ipmi_ipmb_checksum(u_char *data, int len) 208 { 209 u_char sum = 0; 210 211 for (; len; len--) { 212 sum += *data++; 213 } 214 return (-sum); 215 } 216 217 /* XXX: Needs work */ 218 static int 219 ipmi_ipmb_send_message(device_t dev, u_char channel, u_char netfn, 220 u_char command, u_char seq, u_char *data, int data_len) 221 { 222 struct ipmi_softc *sc = device_get_softc(dev); 223 struct ipmi_request *req; 224 u_char slave_addr = 0x52; 225 int error; 226 227 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 228 IPMI_SEND_MSG, data_len + 8, 0); 229 req->ir_request[0] = channel; 230 req->ir_request[1] = slave_addr; 231 req->ir_request[2] = IPMI_ADDR(netfn, 0); 232 req->ir_request[3] = ipmi_ipmb_checksum(&req->ir_request[1], 2); 233 req->ir_request[4] = sc->ipmi_address; 234 req->ir_request[5] = IPMI_ADDR(seq, sc->ipmi_lun); 235 req->ir_request[6] = command; 236 237 bcopy(data, &req->ir_request[7], data_len); 238 temp[data_len + 7] = ipmi_ipmb_checksum(&req->ir_request[4], 239 data_len + 3); 240 241 ipmi_submit_driver_request(sc, req); 242 error = req->ir_error; 243 ipmi_free_request(req); 244 245 return (error); 246 } 247 248 static int 249 ipmi_handle_attn(struct ipmi_softc *sc) 250 { 251 struct ipmi_request *req; 252 int error; 253 254 device_printf(sc->ipmi_dev, "BMC has a message\n"); 255 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 256 IPMI_GET_MSG_FLAGS, 0, 1); 257 258 ipmi_submit_driver_request(sc, req); 259 260 if (req->ir_error == 0 && req->ir_compcode == 0) { 261 if (req->ir_reply[0] & IPMI_MSG_BUFFER_FULL) { 262 device_printf(sc->ipmi_dev, "message buffer full"); 263 } 264 if (req->ir_reply[0] & IPMI_WDT_PRE_TIMEOUT) { 265 device_printf(sc->ipmi_dev, 266 "watchdog about to go off"); 267 } 268 if (req->ir_reply[0] & IPMI_MSG_AVAILABLE) { 269 ipmi_free_request(req); 270 271 req = ipmi_alloc_driver_request( 272 IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG, 0, 273 16); 274 275 device_printf(sc->ipmi_dev, "throw out message "); 276 dump_buf(temp, 16); 277 } 278 } 279 error = req->ir_error; 280 ipmi_free_request(req); 281 282 return (error); 283 } 284 #endif 285 286 #ifdef IPMICTL_SEND_COMMAND_32 287 #define PTRIN(p) ((void *)(uintptr_t)(p)) 288 #define PTROUT(p) ((uintptr_t)(p)) 289 #endif 290 291 static int 292 ipmi_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, 293 int flags, struct thread *td) 294 { 295 struct ipmi_softc *sc; 296 struct ipmi_device *dev; 297 struct ipmi_request *kreq; 298 struct ipmi_req *req = (struct ipmi_req *)data; 299 struct ipmi_recv *recv = (struct ipmi_recv *)data; 300 struct ipmi_addr addr; 301 #ifdef IPMICTL_SEND_COMMAND_32 302 struct ipmi_req32 *req32 = (struct ipmi_req32 *)data; 303 struct ipmi_recv32 *recv32 = (struct ipmi_recv32 *)data; 304 union { 305 struct ipmi_req req; 306 struct ipmi_recv recv; 307 } thunk32; 308 #endif 309 int error, len; 310 311 dev = cdev->si_drv1; 312 sc = dev->ipmi_softc; 313 314 #ifdef IPMICTL_SEND_COMMAND_32 315 /* Convert 32-bit structures to native. */ 316 switch (cmd) { 317 case IPMICTL_SEND_COMMAND_32: 318 req = &thunk32.req; 319 req->addr = PTRIN(req32->addr); 320 req->addr_len = req32->addr_len; 321 req->msgid = req32->msgid; 322 req->msg.netfn = req32->msg.netfn; 323 req->msg.cmd = req32->msg.cmd; 324 req->msg.data_len = req32->msg.data_len; 325 req->msg.data = PTRIN(req32->msg.data); 326 break; 327 case IPMICTL_RECEIVE_MSG_TRUNC_32: 328 case IPMICTL_RECEIVE_MSG_32: 329 recv = &thunk32.recv; 330 recv->addr = PTRIN(recv32->addr); 331 recv->addr_len = recv32->addr_len; 332 recv->msg.data_len = recv32->msg.data_len; 333 recv->msg.data = PTRIN(recv32->msg.data); 334 break; 335 } 336 #endif 337 338 switch (cmd) { 339 #ifdef IPMICTL_SEND_COMMAND_32 340 case IPMICTL_SEND_COMMAND_32: 341 #endif 342 case IPMICTL_SEND_COMMAND: 343 /* 344 * XXX: Need to add proper handling of this. 345 */ 346 error = copyin(req->addr, &addr, sizeof(addr)); 347 if (error) 348 return (error); 349 350 IPMI_LOCK(sc); 351 /* clear out old stuff in queue of stuff done */ 352 /* XXX: This seems odd. */ 353 while ((kreq = TAILQ_FIRST(&dev->ipmi_completed_requests))) { 354 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, 355 ir_link); 356 dev->ipmi_requests--; 357 ipmi_free_request(kreq); 358 } 359 IPMI_UNLOCK(sc); 360 361 kreq = ipmi_alloc_request(dev, req->msgid, 362 IPMI_ADDR(req->msg.netfn, 0), req->msg.cmd, 363 req->msg.data_len, IPMI_MAX_RX); 364 error = copyin(req->msg.data, kreq->ir_request, 365 req->msg.data_len); 366 if (error) { 367 ipmi_free_request(kreq); 368 return (error); 369 } 370 IPMI_LOCK(sc); 371 dev->ipmi_requests++; 372 error = sc->ipmi_enqueue_request(sc, kreq); 373 IPMI_UNLOCK(sc); 374 if (error) 375 return (error); 376 break; 377 #ifdef IPMICTL_SEND_COMMAND_32 378 case IPMICTL_RECEIVE_MSG_TRUNC_32: 379 case IPMICTL_RECEIVE_MSG_32: 380 #endif 381 case IPMICTL_RECEIVE_MSG_TRUNC: 382 case IPMICTL_RECEIVE_MSG: 383 error = copyin(recv->addr, &addr, sizeof(addr)); 384 if (error) 385 return (error); 386 387 IPMI_LOCK(sc); 388 kreq = TAILQ_FIRST(&dev->ipmi_completed_requests); 389 if (kreq == NULL) { 390 IPMI_UNLOCK(sc); 391 return (EAGAIN); 392 } 393 addr.channel = IPMI_BMC_CHANNEL; 394 /* XXX */ 395 recv->recv_type = IPMI_RESPONSE_RECV_TYPE; 396 recv->msgid = kreq->ir_msgid; 397 recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_addr) >> 2; 398 recv->msg.cmd = kreq->ir_command; 399 error = kreq->ir_error; 400 if (error) { 401 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, 402 ir_link); 403 dev->ipmi_requests--; 404 IPMI_UNLOCK(sc); 405 ipmi_free_request(kreq); 406 return (error); 407 } 408 len = kreq->ir_replylen + 1; 409 if (recv->msg.data_len < len && 410 (cmd == IPMICTL_RECEIVE_MSG 411 #ifdef IPMICTL_RECEIVE_MSG_32 412 || cmd == IPMICTL_RECEIVE_MSG 413 #endif 414 )) { 415 IPMI_UNLOCK(sc); 416 return (EMSGSIZE); 417 } 418 TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); 419 dev->ipmi_requests--; 420 IPMI_UNLOCK(sc); 421 len = min(recv->msg.data_len, len); 422 recv->msg.data_len = len; 423 error = copyout(&addr, recv->addr,sizeof(addr)); 424 if (error == 0) 425 error = copyout(&kreq->ir_compcode, recv->msg.data, 1); 426 if (error == 0) 427 error = copyout(kreq->ir_reply, recv->msg.data + 1, 428 len - 1); 429 ipmi_free_request(kreq); 430 if (error) 431 return (error); 432 break; 433 case IPMICTL_SET_MY_ADDRESS_CMD: 434 IPMI_LOCK(sc); 435 dev->ipmi_address = *(int*)data; 436 IPMI_UNLOCK(sc); 437 break; 438 case IPMICTL_GET_MY_ADDRESS_CMD: 439 IPMI_LOCK(sc); 440 *(int*)data = dev->ipmi_address; 441 IPMI_UNLOCK(sc); 442 break; 443 case IPMICTL_SET_MY_LUN_CMD: 444 IPMI_LOCK(sc); 445 dev->ipmi_lun = *(int*)data & 0x3; 446 IPMI_UNLOCK(sc); 447 break; 448 case IPMICTL_GET_MY_LUN_CMD: 449 IPMI_LOCK(sc); 450 *(int*)data = dev->ipmi_lun; 451 IPMI_UNLOCK(sc); 452 break; 453 case IPMICTL_SET_GETS_EVENTS_CMD: 454 /* 455 device_printf(sc->ipmi_dev, 456 "IPMICTL_SET_GETS_EVENTS_CMD NA\n"); 457 */ 458 break; 459 case IPMICTL_REGISTER_FOR_CMD: 460 case IPMICTL_UNREGISTER_FOR_CMD: 461 return (EOPNOTSUPP); 462 default: 463 device_printf(sc->ipmi_dev, "Unknown IOCTL %lX\n", cmd); 464 return (ENOIOCTL); 465 } 466 467 #ifdef IPMICTL_SEND_COMMAND_32 468 /* Update changed fields in 32-bit structures. */ 469 switch (cmd) { 470 case IPMICTL_RECEIVE_MSG_TRUNC_32: 471 case IPMICTL_RECEIVE_MSG_32: 472 recv32->recv_type = recv->recv_type; 473 recv32->msgid = recv->msgid; 474 recv32->msg.netfn = recv->msg.netfn; 475 recv32->msg.cmd = recv->msg.cmd; 476 recv32->msg.data_len = recv->msg.data_len; 477 break; 478 } 479 #endif 480 return (0); 481 } 482 483 /* 484 * Request management. 485 */ 486 487 /* Allocate a new request with request and reply buffers. */ 488 struct ipmi_request * 489 ipmi_alloc_request(struct ipmi_device *dev, long msgid, uint8_t addr, 490 uint8_t command, size_t requestlen, size_t replylen) 491 { 492 struct ipmi_request *req; 493 494 req = malloc(sizeof(struct ipmi_request) + requestlen + replylen, 495 M_IPMI, M_WAITOK | M_ZERO); 496 req->ir_owner = dev; 497 req->ir_msgid = msgid; 498 req->ir_addr = addr; 499 req->ir_command = command; 500 if (requestlen) { 501 req->ir_request = (char *)&req[1]; 502 req->ir_requestlen = requestlen; 503 } 504 if (replylen) { 505 req->ir_reply = (char *)&req[1] + requestlen; 506 req->ir_replybuflen = replylen; 507 } 508 return (req); 509 } 510 511 /* Free a request no longer in use. */ 512 void 513 ipmi_free_request(struct ipmi_request *req) 514 { 515 516 free(req, M_IPMI); 517 } 518 519 /* Store a processed request on the appropriate completion queue. */ 520 void 521 ipmi_complete_request(struct ipmi_softc *sc, struct ipmi_request *req) 522 { 523 struct ipmi_device *dev; 524 525 IPMI_LOCK_ASSERT(sc); 526 527 /* 528 * Anonymous requests (from inside the driver) always have a 529 * waiter that we awaken. 530 */ 531 if (req->ir_owner == NULL) 532 wakeup(req); 533 else { 534 dev = req->ir_owner; 535 TAILQ_INSERT_TAIL(&dev->ipmi_completed_requests, req, ir_link); 536 selwakeup(&dev->ipmi_select); 537 if (dev->ipmi_closing) 538 wakeup(&dev->ipmi_requests); 539 } 540 } 541 542 /* Enqueue an internal driver request and wait until it is completed. */ 543 int 544 ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, 545 int timo) 546 { 547 int error; 548 549 IPMI_LOCK(sc); 550 error = sc->ipmi_enqueue_request(sc, req); 551 if (error == 0) 552 error = msleep(req, &sc->ipmi_lock, 0, "ipmireq", timo); 553 if (error == 0) 554 error = req->ir_error; 555 IPMI_UNLOCK(sc); 556 return (error); 557 } 558 559 /* 560 * Helper routine for polled system interfaces that use 561 * ipmi_polled_enqueue_request() to queue requests. This request 562 * waits until there is a pending request and then returns the first 563 * request. If the driver is shutting down, it returns NULL. 564 */ 565 struct ipmi_request * 566 ipmi_dequeue_request(struct ipmi_softc *sc) 567 { 568 struct ipmi_request *req; 569 570 IPMI_LOCK_ASSERT(sc); 571 572 while (!sc->ipmi_detaching && TAILQ_EMPTY(&sc->ipmi_pending_requests)) 573 cv_wait(&sc->ipmi_request_added, &sc->ipmi_lock); 574 if (sc->ipmi_detaching) 575 return (NULL); 576 577 req = TAILQ_FIRST(&sc->ipmi_pending_requests); 578 TAILQ_REMOVE(&sc->ipmi_pending_requests, req, ir_link); 579 return (req); 580 } 581 582 /* Default implementation of ipmi_enqueue_request() for polled interfaces. */ 583 int 584 ipmi_polled_enqueue_request(struct ipmi_softc *sc, struct ipmi_request *req) 585 { 586 587 IPMI_LOCK_ASSERT(sc); 588 589 TAILQ_INSERT_TAIL(&sc->ipmi_pending_requests, req, ir_link); 590 cv_signal(&sc->ipmi_request_added); 591 return (0); 592 } 593 594 /* 595 * Watchdog event handler. 596 */ 597 598 static void 599 ipmi_set_watchdog(struct ipmi_softc *sc, int sec) 600 { 601 struct ipmi_request *req; 602 int error; 603 604 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 605 IPMI_SET_WDOG, 6, 0); 606 607 if (sec) { 608 req->ir_request[0] = IPMI_SET_WD_TIMER_DONT_STOP 609 | IPMI_SET_WD_TIMER_SMS_OS; 610 req->ir_request[1] = IPMI_SET_WD_ACTION_RESET; 611 req->ir_request[2] = 0; 612 req->ir_request[3] = 0; /* Timer use */ 613 req->ir_request[4] = (sec * 10) & 0xff; 614 req->ir_request[5] = (sec * 10) / 2550; 615 } else { 616 req->ir_request[0] = IPMI_SET_WD_TIMER_SMS_OS; 617 req->ir_request[1] = 0; 618 req->ir_request[2] = 0; 619 req->ir_request[3] = 0; /* Timer use */ 620 req->ir_request[4] = 0; 621 req->ir_request[5] = 0; 622 } 623 624 error = ipmi_submit_driver_request(sc, req, 0); 625 if (error) 626 device_printf(sc->ipmi_dev, "Failed to set watchdog\n"); 627 628 if (error == 0 && sec) { 629 ipmi_free_request(req); 630 631 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 632 IPMI_RESET_WDOG, 0, 0); 633 634 error = ipmi_submit_driver_request(sc, req, 0); 635 if (error) 636 device_printf(sc->ipmi_dev, 637 "Failed to reset watchdog\n"); 638 } 639 640 ipmi_free_request(req); 641 /* 642 dump_watchdog(sc); 643 */ 644 } 645 646 static void 647 ipmi_wd_event(void *arg, unsigned int cmd, int *error) 648 { 649 struct ipmi_softc *sc = arg; 650 unsigned int timeout; 651 652 cmd &= WD_INTERVAL; 653 if (cmd > 0 && cmd <= 63) { 654 timeout = ((uint64_t)1 << cmd) / 1800000000; 655 ipmi_set_watchdog(sc, timeout); 656 *error = 0; 657 } else { 658 ipmi_set_watchdog(sc, 0); 659 } 660 } 661 662 #ifdef CLONING 663 static void 664 ipmi_clone(void *arg, struct ucred *cred, char *name, int namelen, 665 struct cdev **cdev) 666 { 667 struct ipmi_softc *sc = arg; 668 struct ipmi_device *dev; 669 int minor, unit; 670 671 if (*cdev != NULL) 672 return; 673 674 if (strcmp(name, device_get_nameunit(sc->ipmi_dev)) != 0) 675 return; 676 677 dev = malloc(sizeof(struct ipmi_device), M_IPMI, M_WAITOK | M_ZERO); 678 679 /* Reserve a sub-device. */ 680 IPMI_LOCK(sc); 681 minor = ffs(~(sc->ipmi_cdev_mask & 0xffff)); 682 if (minor == 0 || !sc->ipmi_cloning) { 683 IPMI_UNLOCK(sc); 684 free(dev, M_IPMI); 685 return; 686 } 687 minor--; 688 sc->ipmi_cdev_mask |= (1 << minor); 689 TAILQ_INSERT_TAIL(&sc->ipmi_cdevs, dev, ipmi_link); 690 IPMI_UNLOCK(sc); 691 692 /* Initialize the device. */ 693 TAILQ_INIT(&dev->ipmi_completed_requests); 694 dev->ipmi_softc = sc; 695 dev->ipmi_address = IPMI_BMC_SLAVE_ADDR; 696 dev->ipmi_lun = IPMI_BMC_SMS_LUN; 697 unit = device_get_unit(sc->ipmi_dev); 698 dev->ipmi_cdev = make_dev_cred(&ipmi_cdevsw, unit * 32 + minor, cred, 699 UID_ROOT, GID_OPERATOR, 0660, "ipmi%d.%d", unit, minor); 700 if (dev->ipmi_cdev == NULL) { 701 IPMI_LOCK(sc); 702 sc->ipmi_cdev_mask &= ~(1 << minor); 703 TAILQ_REMOVE(&sc->ipmi_cdevs, dev, ipmi_link); 704 IPMI_UNLOCK(sc); 705 free(dev, M_IPMI); 706 return; 707 } 708 dev->ipmi_cdev->si_drv1 = dev; 709 *cdev = dev->ipmi_cdev; 710 dev_ref(*cdev); 711 } 712 #endif 713 714 static void 715 ipmi_startup(void *arg) 716 { 717 struct ipmi_softc *sc = arg; 718 struct ipmi_request *req; 719 device_t dev; 720 int error, i; 721 722 config_intrhook_disestablish(&sc->ipmi_ich); 723 dev = sc->ipmi_dev; 724 725 /* Initialize interface-independent state. */ 726 mtx_init(&sc->ipmi_lock, device_get_nameunit(dev), "ipmi", MTX_DEF); 727 cv_init(&sc->ipmi_request_added, "ipmireq"); 728 TAILQ_INIT(&sc->ipmi_pending_requests); 729 #ifdef CLONING 730 TAILQ_INIT(&sc->ipmi_cdevs); 731 #endif 732 733 /* Initialize interface-dependent state. */ 734 error = sc->ipmi_startup(sc); 735 if (error) { 736 device_printf(dev, "Failed to initialize interface: %d\n", 737 error); 738 return; 739 } 740 741 /* Send a GET_DEVICE_ID request. */ 742 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 743 IPMI_GET_DEVICE_ID, 0, 15); 744 745 error = ipmi_submit_driver_request(sc, req, MAX_TIMEOUT); 746 if (error == EWOULDBLOCK) { 747 device_printf(dev, "Timed out waiting for GET_DEVICE_ID\n"); 748 ipmi_free_request(req); 749 return; 750 } else if (error) { 751 device_printf(dev, "Failed GET_DEVICE_ID: %d\n", error); 752 ipmi_free_request(req); 753 return; 754 } else if (req->ir_compcode != 0) { 755 device_printf(dev, 756 "Bad completion code for GET_DEVICE_ID: %d\n", 757 req->ir_compcode); 758 ipmi_free_request(req); 759 return; 760 } else if (req->ir_replylen < 5) { 761 device_printf(dev, "Short reply for GET_DEVICE_ID: %d\n", 762 req->ir_replylen); 763 ipmi_free_request(req); 764 return; 765 } 766 767 device_printf(dev, "IPMI device rev. %d, firmware rev. %d.%d, " 768 "version %d.%d\n", 769 req->ir_reply[1] & 0x0f, 770 req->ir_reply[2] & 0x0f, req->ir_reply[4], 771 req->ir_reply[4] & 0x0f, req->ir_reply[4] >> 4); 772 773 ipmi_free_request(req); 774 775 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 776 IPMI_CLEAR_FLAGS, 1, 0); 777 778 ipmi_submit_driver_request(sc, req, 0); 779 780 /* XXX: Magic numbers */ 781 if (req->ir_compcode == 0xc0) { 782 device_printf(dev, "Clear flags is busy\n"); 783 } 784 if (req->ir_compcode == 0xc1) { 785 device_printf(dev, "Clear flags illegal\n"); 786 } 787 ipmi_free_request(req); 788 789 for (i = 0; i < 8; i++) { 790 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 791 IPMI_GET_CHANNEL_INFO, 1, 0); 792 req->ir_request[0] = i; 793 794 ipmi_submit_driver_request(sc, req, 0); 795 796 if (req->ir_compcode != 0) { 797 ipmi_free_request(req); 798 break; 799 } 800 ipmi_free_request(req); 801 } 802 device_printf(dev, "Number of channels %d\n", i); 803 804 /* probe for watchdog */ 805 req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), 806 IPMI_GET_WDOG, 0, 0); 807 808 ipmi_submit_driver_request(sc, req, 0); 809 810 if (req->ir_compcode == 0x00) { 811 device_printf(dev, "Attached watchdog\n"); 812 /* register the watchdog event handler */ 813 sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER(watchdog_list, 814 ipmi_wd_event, sc, 0); 815 } 816 ipmi_free_request(req); 817 818 #ifdef CLONING 819 sc->ipmi_cloning = 1; 820 sc->ipmi_clone_tag = EVENTHANDLER_REGISTER(dev_clone, ipmi_clone, sc, 821 1000); 822 #else 823 /* Initialize the device. */ 824 TAILQ_INIT(&sc->ipmi_idev.ipmi_completed_requests); 825 sc->ipmi_idev.ipmi_softc = sc; 826 sc->ipmi_idev.ipmi_address = IPMI_BMC_SLAVE_ADDR; 827 sc->ipmi_idev.ipmi_lun = IPMI_BMC_SMS_LUN; 828 sc->ipmi_idev.ipmi_cdev = make_dev(&ipmi_cdevsw, device_get_unit(dev), 829 UID_ROOT, GID_OPERATOR, 0660, "ipmi%d", device_get_unit(dev)); 830 if (sc->ipmi_idev.ipmi_cdev == NULL) { 831 device_printf(dev, "Failed to create cdev\n"); 832 return; 833 } 834 sc->ipmi_idev.ipmi_cdev->si_drv1 = &sc->ipmi_idev; 835 #endif 836 } 837 838 int 839 ipmi_attach(device_t dev) 840 { 841 struct ipmi_softc *sc = device_get_softc(dev); 842 int error; 843 844 if (sc->ipmi_irq_res != NULL && sc->ipmi_intr != NULL) { 845 error = bus_setup_intr(dev, sc->ipmi_irq_res, INTR_TYPE_MISC, 846 NULL, sc->ipmi_intr, sc, &sc->ipmi_irq); 847 if (error) { 848 device_printf(dev, "can't set up interrupt\n"); 849 return (error); 850 } 851 } 852 853 bzero(&sc->ipmi_ich, sizeof(struct intr_config_hook)); 854 sc->ipmi_ich.ich_func = ipmi_startup; 855 sc->ipmi_ich.ich_arg = sc; 856 if (config_intrhook_establish(&sc->ipmi_ich) != 0) { 857 device_printf(dev, "can't establish configuration hook\n"); 858 return (ENOMEM); 859 } 860 861 ipmi_attached = 1; 862 return (0); 863 } 864 865 int 866 ipmi_detach(device_t dev) 867 { 868 struct ipmi_softc *sc; 869 870 sc = device_get_softc(dev); 871 872 /* Fail if there are any open handles. */ 873 IPMI_LOCK(sc); 874 #ifdef CLONING 875 if (!TAILQ_EMPTY(&sc->ipmi_cdevs)) { 876 IPMI_UNLOCK(sc); 877 return (EBUSY); 878 } 879 880 /* Turn off cloning. */ 881 sc->ipmi_cloning = 0; 882 IPMI_UNLOCK(sc); 883 884 if (sc->ipmi_clone_tag) 885 EVENTHANDLER_DEREGISTER(dev_clone, sc->ipmi_clone_tag); 886 #else 887 if (sc->ipmi_idev.ipmi_open) { 888 IPMI_UNLOCK(sc); 889 return (EBUSY); 890 } 891 IPMI_UNLOCK(sc); 892 if (sc->ipmi_idev.ipmi_cdev) 893 destroy_dev(sc->ipmi_idev.ipmi_cdev); 894 #endif 895 896 /* Detach from watchdog handling and turn off watchdog. */ 897 if (sc->ipmi_watchdog_tag) { 898 EVENTHANDLER_DEREGISTER(watchdog_list, sc->ipmi_watchdog_tag); 899 ipmi_set_watchdog(sc, 0); 900 } 901 902 /* XXX: should use shutdown callout I think. */ 903 /* If the backend uses a kthread, shut it down. */ 904 IPMI_LOCK(sc); 905 sc->ipmi_detaching = 1; 906 if (sc->ipmi_kthread) { 907 cv_broadcast(&sc->ipmi_request_added); 908 msleep(sc->ipmi_kthread, &sc->ipmi_lock, 0, "ipmi_wait", 0); 909 } 910 IPMI_UNLOCK(sc); 911 if (sc->ipmi_irq) 912 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 913 914 ipmi_release_resources(dev); 915 mtx_destroy(&sc->ipmi_lock); 916 return (0); 917 } 918 919 void 920 ipmi_release_resources(device_t dev) 921 { 922 struct ipmi_softc *sc; 923 int i; 924 925 sc = device_get_softc(dev); 926 if (sc->ipmi_irq) 927 bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); 928 if (sc->ipmi_irq_res) 929 bus_release_resource(dev, SYS_RES_IRQ, sc->ipmi_irq_rid, 930 sc->ipmi_irq_res); 931 for (i = 0; i < MAX_RES; i++) 932 if (sc->ipmi_io_res[i]) 933 bus_release_resource(dev, sc->ipmi_io_type, 934 sc->ipmi_io_rid + i, sc->ipmi_io_res[i]); 935 } 936 937 devclass_t ipmi_devclass; 938 939 /* XXX: Why? */ 940 static void 941 ipmi_unload(void *arg) 942 { 943 device_t * devs; 944 int count; 945 int i; 946 947 if (devclass_get_devices(ipmi_devclass, &devs, &count) != 0) 948 return; 949 for (i = 0; i < count; i++) 950 device_delete_child(device_get_parent(devs[i]), devs[i]); 951 free(devs, M_TEMP); 952 } 953 SYSUNINIT(ipmi_unload, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipmi_unload, NULL); 954 955 #ifdef IMPI_DEBUG 956 static void 957 dump_buf(u_char *data, int len) 958 { 959 char buf[20]; 960 char line[1024]; 961 char temp[30]; 962 int count = 0; 963 int i=0; 964 965 printf("Address %p len %d\n", data, len); 966 if (len > 256) 967 len = 256; 968 line[0] = '\000'; 969 for (; len > 0; len--, data++) { 970 sprintf(temp, "%02x ", *data); 971 strcat(line, temp); 972 if (*data >= ' ' && *data <= '~') 973 buf[count] = *data; 974 else if (*data >= 'A' && *data <= 'Z') 975 buf[count] = *data; 976 else 977 buf[count] = '.'; 978 if (++count == 16) { 979 buf[count] = '\000'; 980 count = 0; 981 printf(" %3x %s %s\n", i, line, buf); 982 i+=16; 983 line[0] = '\000'; 984 } 985 } 986 buf[count] = '\000'; 987 988 for (; count != 16; count++) { 989 strcat(line, " "); 990 } 991 printf(" %3x %s %s\n", i, line, buf); 992 } 993 #endif 994