vmbus.c revision 307463
1/*- 2 * Copyright (c) 2009-2012,2016 Microsoft Corp. 3 * Copyright (c) 2012 NetApp Inc. 4 * Copyright (c) 2012 Citrix Inc. 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 unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29/* 30 * VM Bus Driver Implementation 31 */ 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: stable/11/sys/dev/hyperv/vmbus/vmbus.c 307463 2016-10-17 03:29:31Z sephe $"); 34 35#include <sys/param.h> 36#include <sys/bus.h> 37#include <sys/kernel.h> 38#include <sys/lock.h> 39#include <sys/malloc.h> 40#include <sys/module.h> 41#include <sys/proc.h> 42#include <sys/sysctl.h> 43#include <sys/syslog.h> 44#include <sys/systm.h> 45#include <sys/rtprio.h> 46#include <sys/interrupt.h> 47#include <sys/sx.h> 48#include <sys/taskqueue.h> 49#include <sys/mutex.h> 50#include <sys/smp.h> 51 52#include <machine/resource.h> 53#include <sys/rman.h> 54 55#include <machine/stdarg.h> 56#include <machine/intr_machdep.h> 57#include <machine/md_var.h> 58#include <machine/segments.h> 59#include <sys/pcpu.h> 60#include <x86/apicvar.h> 61 62#include <dev/hyperv/include/hyperv.h> 63#include <dev/hyperv/vmbus/hyperv_reg.h> 64#include <dev/hyperv/vmbus/hyperv_var.h> 65#include <dev/hyperv/vmbus/vmbus_reg.h> 66#include <dev/hyperv/vmbus/vmbus_var.h> 67#include <dev/hyperv/vmbus/vmbus_chanvar.h> 68 69#include <contrib/dev/acpica/include/acpi.h> 70#include "acpi_if.h" 71#include "vmbus_if.h" 72 73#define VMBUS_GPADL_START 0xe1e10 74 75struct vmbus_msghc { 76 struct hypercall_postmsg_in *mh_inprm; 77 struct hypercall_postmsg_in mh_inprm_save; 78 struct hyperv_dma mh_inprm_dma; 79 80 struct vmbus_message *mh_resp; 81 struct vmbus_message mh_resp0; 82}; 83 84struct vmbus_msghc_ctx { 85 struct vmbus_msghc *mhc_free; 86 struct mtx mhc_free_lock; 87 uint32_t mhc_flags; 88 89 struct vmbus_msghc *mhc_active; 90 struct mtx mhc_active_lock; 91}; 92 93#define VMBUS_MSGHC_CTXF_DESTROY 0x0001 94 95static int vmbus_init(struct vmbus_softc *); 96static int vmbus_connect(struct vmbus_softc *, uint32_t); 97static int vmbus_req_channels(struct vmbus_softc *sc); 98static void vmbus_disconnect(struct vmbus_softc *); 99static int vmbus_scan(struct vmbus_softc *); 100static void vmbus_scan_wait(struct vmbus_softc *); 101static void vmbus_scan_newchan(struct vmbus_softc *); 102static void vmbus_scan_newdev(struct vmbus_softc *); 103static void vmbus_scan_done(struct vmbus_softc *, 104 const struct vmbus_message *); 105static void vmbus_chanmsg_handle(struct vmbus_softc *, 106 const struct vmbus_message *); 107 108static int vmbus_sysctl_version(SYSCTL_HANDLER_ARGS); 109 110static struct vmbus_msghc_ctx *vmbus_msghc_ctx_create(bus_dma_tag_t); 111static void vmbus_msghc_ctx_destroy( 112 struct vmbus_msghc_ctx *); 113static void vmbus_msghc_ctx_free(struct vmbus_msghc_ctx *); 114static struct vmbus_msghc *vmbus_msghc_alloc(bus_dma_tag_t); 115static void vmbus_msghc_free(struct vmbus_msghc *); 116static struct vmbus_msghc *vmbus_msghc_get1(struct vmbus_msghc_ctx *, 117 uint32_t); 118 119struct vmbus_softc *vmbus_sc; 120 121extern inthand_t IDTVEC(vmbus_isr); 122 123static const uint32_t vmbus_version[] = { 124 VMBUS_VERSION_WIN8_1, 125 VMBUS_VERSION_WIN8, 126 VMBUS_VERSION_WIN7, 127 VMBUS_VERSION_WS2008 128}; 129 130static const vmbus_chanmsg_proc_t 131vmbus_chanmsg_handlers[VMBUS_CHANMSG_TYPE_MAX] = { 132 VMBUS_CHANMSG_PROC(CHOFFER_DONE, vmbus_scan_done), 133 VMBUS_CHANMSG_PROC_WAKEUP(CONNECT_RESP) 134}; 135 136static struct vmbus_msghc * 137vmbus_msghc_alloc(bus_dma_tag_t parent_dtag) 138{ 139 struct vmbus_msghc *mh; 140 141 mh = malloc(sizeof(*mh), M_DEVBUF, M_WAITOK | M_ZERO); 142 143 mh->mh_inprm = hyperv_dmamem_alloc(parent_dtag, 144 HYPERCALL_PARAM_ALIGN, 0, HYPERCALL_POSTMSGIN_SIZE, 145 &mh->mh_inprm_dma, BUS_DMA_WAITOK); 146 if (mh->mh_inprm == NULL) { 147 free(mh, M_DEVBUF); 148 return NULL; 149 } 150 return mh; 151} 152 153static void 154vmbus_msghc_free(struct vmbus_msghc *mh) 155{ 156 hyperv_dmamem_free(&mh->mh_inprm_dma, mh->mh_inprm); 157 free(mh, M_DEVBUF); 158} 159 160static void 161vmbus_msghc_ctx_free(struct vmbus_msghc_ctx *mhc) 162{ 163 KASSERT(mhc->mhc_active == NULL, ("still have active msg hypercall")); 164 KASSERT(mhc->mhc_free == NULL, ("still have hypercall msg")); 165 166 mtx_destroy(&mhc->mhc_free_lock); 167 mtx_destroy(&mhc->mhc_active_lock); 168 free(mhc, M_DEVBUF); 169} 170 171static struct vmbus_msghc_ctx * 172vmbus_msghc_ctx_create(bus_dma_tag_t parent_dtag) 173{ 174 struct vmbus_msghc_ctx *mhc; 175 176 mhc = malloc(sizeof(*mhc), M_DEVBUF, M_WAITOK | M_ZERO); 177 mtx_init(&mhc->mhc_free_lock, "vmbus msghc free", NULL, MTX_DEF); 178 mtx_init(&mhc->mhc_active_lock, "vmbus msghc act", NULL, MTX_DEF); 179 180 mhc->mhc_free = vmbus_msghc_alloc(parent_dtag); 181 if (mhc->mhc_free == NULL) { 182 vmbus_msghc_ctx_free(mhc); 183 return NULL; 184 } 185 return mhc; 186} 187 188static struct vmbus_msghc * 189vmbus_msghc_get1(struct vmbus_msghc_ctx *mhc, uint32_t dtor_flag) 190{ 191 struct vmbus_msghc *mh; 192 193 mtx_lock(&mhc->mhc_free_lock); 194 195 while ((mhc->mhc_flags & dtor_flag) == 0 && mhc->mhc_free == NULL) { 196 mtx_sleep(&mhc->mhc_free, &mhc->mhc_free_lock, 0, 197 "gmsghc", 0); 198 } 199 if (mhc->mhc_flags & dtor_flag) { 200 /* Being destroyed */ 201 mh = NULL; 202 } else { 203 mh = mhc->mhc_free; 204 KASSERT(mh != NULL, ("no free hypercall msg")); 205 KASSERT(mh->mh_resp == NULL, 206 ("hypercall msg has pending response")); 207 mhc->mhc_free = NULL; 208 } 209 210 mtx_unlock(&mhc->mhc_free_lock); 211 212 return mh; 213} 214 215void 216vmbus_msghc_reset(struct vmbus_msghc *mh, size_t dsize) 217{ 218 struct hypercall_postmsg_in *inprm; 219 220 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 221 panic("invalid data size %zu", dsize); 222 223 inprm = mh->mh_inprm; 224 memset(inprm, 0, HYPERCALL_POSTMSGIN_SIZE); 225 inprm->hc_connid = VMBUS_CONNID_MESSAGE; 226 inprm->hc_msgtype = HYPERV_MSGTYPE_CHANNEL; 227 inprm->hc_dsize = dsize; 228} 229 230struct vmbus_msghc * 231vmbus_msghc_get(struct vmbus_softc *sc, size_t dsize) 232{ 233 struct vmbus_msghc *mh; 234 235 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 236 panic("invalid data size %zu", dsize); 237 238 mh = vmbus_msghc_get1(sc->vmbus_msg_hc, VMBUS_MSGHC_CTXF_DESTROY); 239 if (mh == NULL) 240 return NULL; 241 242 vmbus_msghc_reset(mh, dsize); 243 return mh; 244} 245 246void 247vmbus_msghc_put(struct vmbus_softc *sc, struct vmbus_msghc *mh) 248{ 249 struct vmbus_msghc_ctx *mhc = sc->vmbus_msg_hc; 250 251 KASSERT(mhc->mhc_active == NULL, ("msg hypercall is active")); 252 mh->mh_resp = NULL; 253 254 mtx_lock(&mhc->mhc_free_lock); 255 KASSERT(mhc->mhc_free == NULL, ("has free hypercall msg")); 256 mhc->mhc_free = mh; 257 mtx_unlock(&mhc->mhc_free_lock); 258 wakeup(&mhc->mhc_free); 259} 260 261void * 262vmbus_msghc_dataptr(struct vmbus_msghc *mh) 263{ 264 return mh->mh_inprm->hc_data; 265} 266 267static void 268vmbus_msghc_ctx_destroy(struct vmbus_msghc_ctx *mhc) 269{ 270 struct vmbus_msghc *mh; 271 272 mtx_lock(&mhc->mhc_free_lock); 273 mhc->mhc_flags |= VMBUS_MSGHC_CTXF_DESTROY; 274 mtx_unlock(&mhc->mhc_free_lock); 275 wakeup(&mhc->mhc_free); 276 277 mh = vmbus_msghc_get1(mhc, 0); 278 if (mh == NULL) 279 panic("can't get msghc"); 280 281 vmbus_msghc_free(mh); 282 vmbus_msghc_ctx_free(mhc); 283} 284 285int 286vmbus_msghc_exec_noresult(struct vmbus_msghc *mh) 287{ 288 sbintime_t time = SBT_1MS; 289 int i; 290 291 /* 292 * Save the input parameter so that we could restore the input 293 * parameter if the Hypercall failed. 294 * 295 * XXX 296 * Is this really necessary?! i.e. Will the Hypercall ever 297 * overwrite the input parameter? 298 */ 299 memcpy(&mh->mh_inprm_save, mh->mh_inprm, HYPERCALL_POSTMSGIN_SIZE); 300 301 /* 302 * In order to cope with transient failures, e.g. insufficient 303 * resources on host side, we retry the post message Hypercall 304 * several times. 20 retries seem sufficient. 305 */ 306#define HC_RETRY_MAX 20 307 308 for (i = 0; i < HC_RETRY_MAX; ++i) { 309 uint64_t status; 310 311 status = hypercall_post_message(mh->mh_inprm_dma.hv_paddr); 312 if (status == HYPERCALL_STATUS_SUCCESS) 313 return 0; 314 315 pause_sbt("hcpmsg", time, 0, C_HARDCLOCK); 316 if (time < SBT_1S * 2) 317 time *= 2; 318 319 /* Restore input parameter and try again */ 320 memcpy(mh->mh_inprm, &mh->mh_inprm_save, 321 HYPERCALL_POSTMSGIN_SIZE); 322 } 323 324#undef HC_RETRY_MAX 325 326 return EIO; 327} 328 329int 330vmbus_msghc_exec(struct vmbus_softc *sc, struct vmbus_msghc *mh) 331{ 332 struct vmbus_msghc_ctx *mhc = sc->vmbus_msg_hc; 333 int error; 334 335 KASSERT(mh->mh_resp == NULL, ("hypercall msg has pending response")); 336 337 mtx_lock(&mhc->mhc_active_lock); 338 KASSERT(mhc->mhc_active == NULL, ("pending active msg hypercall")); 339 mhc->mhc_active = mh; 340 mtx_unlock(&mhc->mhc_active_lock); 341 342 error = vmbus_msghc_exec_noresult(mh); 343 if (error) { 344 mtx_lock(&mhc->mhc_active_lock); 345 KASSERT(mhc->mhc_active == mh, ("msghc mismatch")); 346 mhc->mhc_active = NULL; 347 mtx_unlock(&mhc->mhc_active_lock); 348 } 349 return error; 350} 351 352const struct vmbus_message * 353vmbus_msghc_wait_result(struct vmbus_softc *sc, struct vmbus_msghc *mh) 354{ 355 struct vmbus_msghc_ctx *mhc = sc->vmbus_msg_hc; 356 357 mtx_lock(&mhc->mhc_active_lock); 358 359 KASSERT(mhc->mhc_active == mh, ("msghc mismatch")); 360 while (mh->mh_resp == NULL) { 361 mtx_sleep(&mhc->mhc_active, &mhc->mhc_active_lock, 0, 362 "wmsghc", 0); 363 } 364 mhc->mhc_active = NULL; 365 366 mtx_unlock(&mhc->mhc_active_lock); 367 368 return mh->mh_resp; 369} 370 371void 372vmbus_msghc_wakeup(struct vmbus_softc *sc, const struct vmbus_message *msg) 373{ 374 struct vmbus_msghc_ctx *mhc = sc->vmbus_msg_hc; 375 struct vmbus_msghc *mh; 376 377 mtx_lock(&mhc->mhc_active_lock); 378 379 mh = mhc->mhc_active; 380 KASSERT(mh != NULL, ("no pending msg hypercall")); 381 memcpy(&mh->mh_resp0, msg, sizeof(mh->mh_resp0)); 382 mh->mh_resp = &mh->mh_resp0; 383 384 mtx_unlock(&mhc->mhc_active_lock); 385 wakeup(&mhc->mhc_active); 386} 387 388uint32_t 389vmbus_gpadl_alloc(struct vmbus_softc *sc) 390{ 391 return atomic_fetchadd_int(&sc->vmbus_gpadl, 1); 392} 393 394static int 395vmbus_connect(struct vmbus_softc *sc, uint32_t version) 396{ 397 struct vmbus_chanmsg_connect *req; 398 const struct vmbus_message *msg; 399 struct vmbus_msghc *mh; 400 int error, done = 0; 401 402 mh = vmbus_msghc_get(sc, sizeof(*req)); 403 if (mh == NULL) 404 return ENXIO; 405 406 req = vmbus_msghc_dataptr(mh); 407 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CONNECT; 408 req->chm_ver = version; 409 req->chm_evtflags = sc->vmbus_evtflags_dma.hv_paddr; 410 req->chm_mnf1 = sc->vmbus_mnf1_dma.hv_paddr; 411 req->chm_mnf2 = sc->vmbus_mnf2_dma.hv_paddr; 412 413 error = vmbus_msghc_exec(sc, mh); 414 if (error) { 415 vmbus_msghc_put(sc, mh); 416 return error; 417 } 418 419 msg = vmbus_msghc_wait_result(sc, mh); 420 done = ((const struct vmbus_chanmsg_connect_resp *) 421 msg->msg_data)->chm_done; 422 423 vmbus_msghc_put(sc, mh); 424 425 return (done ? 0 : EOPNOTSUPP); 426} 427 428static int 429vmbus_init(struct vmbus_softc *sc) 430{ 431 int i; 432 433 for (i = 0; i < nitems(vmbus_version); ++i) { 434 int error; 435 436 error = vmbus_connect(sc, vmbus_version[i]); 437 if (!error) { 438 sc->vmbus_version = vmbus_version[i]; 439 device_printf(sc->vmbus_dev, "version %u.%u\n", 440 VMBUS_VERSION_MAJOR(sc->vmbus_version), 441 VMBUS_VERSION_MINOR(sc->vmbus_version)); 442 return 0; 443 } 444 } 445 return ENXIO; 446} 447 448static void 449vmbus_disconnect(struct vmbus_softc *sc) 450{ 451 struct vmbus_chanmsg_disconnect *req; 452 struct vmbus_msghc *mh; 453 int error; 454 455 mh = vmbus_msghc_get(sc, sizeof(*req)); 456 if (mh == NULL) { 457 device_printf(sc->vmbus_dev, 458 "can not get msg hypercall for disconnect\n"); 459 return; 460 } 461 462 req = vmbus_msghc_dataptr(mh); 463 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_DISCONNECT; 464 465 error = vmbus_msghc_exec_noresult(mh); 466 vmbus_msghc_put(sc, mh); 467 468 if (error) { 469 device_printf(sc->vmbus_dev, 470 "disconnect msg hypercall failed\n"); 471 } 472} 473 474static int 475vmbus_req_channels(struct vmbus_softc *sc) 476{ 477 struct vmbus_chanmsg_chrequest *req; 478 struct vmbus_msghc *mh; 479 int error; 480 481 mh = vmbus_msghc_get(sc, sizeof(*req)); 482 if (mh == NULL) 483 return ENXIO; 484 485 req = vmbus_msghc_dataptr(mh); 486 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHREQUEST; 487 488 error = vmbus_msghc_exec_noresult(mh); 489 vmbus_msghc_put(sc, mh); 490 491 return error; 492} 493 494static void 495vmbus_scan_newchan(struct vmbus_softc *sc) 496{ 497 mtx_lock(&sc->vmbus_scan_lock); 498 if ((sc->vmbus_scan_chcnt & VMBUS_SCAN_CHCNT_DONE) == 0) 499 sc->vmbus_scan_chcnt++; 500 mtx_unlock(&sc->vmbus_scan_lock); 501} 502 503static void 504vmbus_scan_done(struct vmbus_softc *sc, 505 const struct vmbus_message *msg __unused) 506{ 507 mtx_lock(&sc->vmbus_scan_lock); 508 sc->vmbus_scan_chcnt |= VMBUS_SCAN_CHCNT_DONE; 509 mtx_unlock(&sc->vmbus_scan_lock); 510 wakeup(&sc->vmbus_scan_chcnt); 511} 512 513static void 514vmbus_scan_newdev(struct vmbus_softc *sc) 515{ 516 mtx_lock(&sc->vmbus_scan_lock); 517 sc->vmbus_scan_devcnt++; 518 mtx_unlock(&sc->vmbus_scan_lock); 519 wakeup(&sc->vmbus_scan_devcnt); 520} 521 522static void 523vmbus_scan_wait(struct vmbus_softc *sc) 524{ 525 uint32_t chancnt; 526 527 mtx_lock(&sc->vmbus_scan_lock); 528 while ((sc->vmbus_scan_chcnt & VMBUS_SCAN_CHCNT_DONE) == 0) { 529 mtx_sleep(&sc->vmbus_scan_chcnt, &sc->vmbus_scan_lock, 0, 530 "waitch", 0); 531 } 532 chancnt = sc->vmbus_scan_chcnt & ~VMBUS_SCAN_CHCNT_DONE; 533 534 while (sc->vmbus_scan_devcnt != chancnt) { 535 mtx_sleep(&sc->vmbus_scan_devcnt, &sc->vmbus_scan_lock, 0, 536 "waitdev", 0); 537 } 538 mtx_unlock(&sc->vmbus_scan_lock); 539} 540 541static int 542vmbus_scan(struct vmbus_softc *sc) 543{ 544 int error; 545 546 /* 547 * Start vmbus scanning. 548 */ 549 error = vmbus_req_channels(sc); 550 if (error) { 551 device_printf(sc->vmbus_dev, "channel request failed: %d\n", 552 error); 553 return error; 554 } 555 556 /* 557 * Wait for all devices are added to vmbus. 558 */ 559 vmbus_scan_wait(sc); 560 561 /* 562 * Identify, probe and attach. 563 */ 564 bus_generic_probe(sc->vmbus_dev); 565 bus_generic_attach(sc->vmbus_dev); 566 567 if (bootverbose) { 568 device_printf(sc->vmbus_dev, "device scan, probe and attach " 569 "done\n"); 570 } 571 return 0; 572} 573 574static void 575vmbus_chanmsg_handle(struct vmbus_softc *sc, const struct vmbus_message *msg) 576{ 577 vmbus_chanmsg_proc_t msg_proc; 578 uint32_t msg_type; 579 580 msg_type = ((const struct vmbus_chanmsg_hdr *)msg->msg_data)->chm_type; 581 if (msg_type >= VMBUS_CHANMSG_TYPE_MAX) { 582 device_printf(sc->vmbus_dev, "unknown message type 0x%x\n", 583 msg_type); 584 return; 585 } 586 587 msg_proc = vmbus_chanmsg_handlers[msg_type]; 588 if (msg_proc != NULL) 589 msg_proc(sc, msg); 590 591 /* Channel specific processing */ 592 vmbus_chan_msgproc(sc, msg); 593} 594 595static void 596vmbus_msg_task(void *xsc, int pending __unused) 597{ 598 struct vmbus_softc *sc = xsc; 599 volatile struct vmbus_message *msg; 600 601 msg = VMBUS_PCPU_GET(sc, message, curcpu) + VMBUS_SINT_MESSAGE; 602 for (;;) { 603 if (msg->msg_type == HYPERV_MSGTYPE_NONE) { 604 /* No message */ 605 break; 606 } else if (msg->msg_type == HYPERV_MSGTYPE_CHANNEL) { 607 /* Channel message */ 608 vmbus_chanmsg_handle(sc, 609 __DEVOLATILE(const struct vmbus_message *, msg)); 610 } 611 612 msg->msg_type = HYPERV_MSGTYPE_NONE; 613 /* 614 * Make sure the write to msg_type (i.e. set to 615 * HYPERV_MSGTYPE_NONE) happens before we read the 616 * msg_flags and EOMing. Otherwise, the EOMing will 617 * not deliver any more messages since there is no 618 * empty slot 619 * 620 * NOTE: 621 * mb() is used here, since atomic_thread_fence_seq_cst() 622 * will become compiler fence on UP kernel. 623 */ 624 mb(); 625 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 626 /* 627 * This will cause message queue rescan to possibly 628 * deliver another msg from the hypervisor 629 */ 630 wrmsr(MSR_HV_EOM, 0); 631 } 632 } 633} 634 635static __inline int 636vmbus_handle_intr1(struct vmbus_softc *sc, struct trapframe *frame, int cpu) 637{ 638 volatile struct vmbus_message *msg; 639 struct vmbus_message *msg_base; 640 641 msg_base = VMBUS_PCPU_GET(sc, message, cpu); 642 643 /* 644 * Check event timer. 645 * 646 * TODO: move this to independent IDT vector. 647 */ 648 msg = msg_base + VMBUS_SINT_TIMER; 649 if (msg->msg_type == HYPERV_MSGTYPE_TIMER_EXPIRED) { 650 msg->msg_type = HYPERV_MSGTYPE_NONE; 651 652 vmbus_et_intr(frame); 653 654 /* 655 * Make sure the write to msg_type (i.e. set to 656 * HYPERV_MSGTYPE_NONE) happens before we read the 657 * msg_flags and EOMing. Otherwise, the EOMing will 658 * not deliver any more messages since there is no 659 * empty slot 660 * 661 * NOTE: 662 * mb() is used here, since atomic_thread_fence_seq_cst() 663 * will become compiler fence on UP kernel. 664 */ 665 mb(); 666 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 667 /* 668 * This will cause message queue rescan to possibly 669 * deliver another msg from the hypervisor 670 */ 671 wrmsr(MSR_HV_EOM, 0); 672 } 673 } 674 675 /* 676 * Check events. Hot path for network and storage I/O data; high rate. 677 * 678 * NOTE: 679 * As recommended by the Windows guest fellows, we check events before 680 * checking messages. 681 */ 682 sc->vmbus_event_proc(sc, cpu); 683 684 /* 685 * Check messages. Mainly management stuffs; ultra low rate. 686 */ 687 msg = msg_base + VMBUS_SINT_MESSAGE; 688 if (__predict_false(msg->msg_type != HYPERV_MSGTYPE_NONE)) { 689 taskqueue_enqueue(VMBUS_PCPU_GET(sc, message_tq, cpu), 690 VMBUS_PCPU_PTR(sc, message_task, cpu)); 691 } 692 693 return (FILTER_HANDLED); 694} 695 696void 697vmbus_handle_intr(struct trapframe *trap_frame) 698{ 699 struct vmbus_softc *sc = vmbus_get_softc(); 700 int cpu = curcpu; 701 702 /* 703 * Disable preemption. 704 */ 705 critical_enter(); 706 707 /* 708 * Do a little interrupt counting. 709 */ 710 (*VMBUS_PCPU_GET(sc, intr_cnt, cpu))++; 711 712 vmbus_handle_intr1(sc, trap_frame, cpu); 713 714 /* 715 * Enable preemption. 716 */ 717 critical_exit(); 718} 719 720static void 721vmbus_synic_setup(void *xsc) 722{ 723 struct vmbus_softc *sc = xsc; 724 int cpu = curcpu; 725 uint64_t val, orig; 726 uint32_t sint; 727 728 if (hyperv_features & CPUID_HV_MSR_VP_INDEX) { 729 /* Save virtual processor id. */ 730 VMBUS_PCPU_GET(sc, vcpuid, cpu) = rdmsr(MSR_HV_VP_INDEX); 731 } else { 732 /* Set virtual processor id to 0 for compatibility. */ 733 VMBUS_PCPU_GET(sc, vcpuid, cpu) = 0; 734 } 735 736 /* 737 * Setup the SynIC message. 738 */ 739 orig = rdmsr(MSR_HV_SIMP); 740 val = MSR_HV_SIMP_ENABLE | (orig & MSR_HV_SIMP_RSVD_MASK) | 741 ((VMBUS_PCPU_GET(sc, message_dma.hv_paddr, cpu) >> PAGE_SHIFT) << 742 MSR_HV_SIMP_PGSHIFT); 743 wrmsr(MSR_HV_SIMP, val); 744 745 /* 746 * Setup the SynIC event flags. 747 */ 748 orig = rdmsr(MSR_HV_SIEFP); 749 val = MSR_HV_SIEFP_ENABLE | (orig & MSR_HV_SIEFP_RSVD_MASK) | 750 ((VMBUS_PCPU_GET(sc, event_flags_dma.hv_paddr, cpu) 751 >> PAGE_SHIFT) << MSR_HV_SIEFP_PGSHIFT); 752 wrmsr(MSR_HV_SIEFP, val); 753 754 755 /* 756 * Configure and unmask SINT for message and event flags. 757 */ 758 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 759 orig = rdmsr(sint); 760 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 761 (orig & MSR_HV_SINT_RSVD_MASK); 762 wrmsr(sint, val); 763 764 /* 765 * Configure and unmask SINT for timer. 766 */ 767 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 768 orig = rdmsr(sint); 769 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 770 (orig & MSR_HV_SINT_RSVD_MASK); 771 wrmsr(sint, val); 772 773 /* 774 * All done; enable SynIC. 775 */ 776 orig = rdmsr(MSR_HV_SCONTROL); 777 val = MSR_HV_SCTRL_ENABLE | (orig & MSR_HV_SCTRL_RSVD_MASK); 778 wrmsr(MSR_HV_SCONTROL, val); 779} 780 781static void 782vmbus_synic_teardown(void *arg) 783{ 784 uint64_t orig; 785 uint32_t sint; 786 787 /* 788 * Disable SynIC. 789 */ 790 orig = rdmsr(MSR_HV_SCONTROL); 791 wrmsr(MSR_HV_SCONTROL, (orig & MSR_HV_SCTRL_RSVD_MASK)); 792 793 /* 794 * Mask message and event flags SINT. 795 */ 796 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 797 orig = rdmsr(sint); 798 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 799 800 /* 801 * Mask timer SINT. 802 */ 803 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 804 orig = rdmsr(sint); 805 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 806 807 /* 808 * Teardown SynIC message. 809 */ 810 orig = rdmsr(MSR_HV_SIMP); 811 wrmsr(MSR_HV_SIMP, (orig & MSR_HV_SIMP_RSVD_MASK)); 812 813 /* 814 * Teardown SynIC event flags. 815 */ 816 orig = rdmsr(MSR_HV_SIEFP); 817 wrmsr(MSR_HV_SIEFP, (orig & MSR_HV_SIEFP_RSVD_MASK)); 818} 819 820static int 821vmbus_dma_alloc(struct vmbus_softc *sc) 822{ 823 bus_dma_tag_t parent_dtag; 824 uint8_t *evtflags; 825 int cpu; 826 827 parent_dtag = bus_get_dma_tag(sc->vmbus_dev); 828 CPU_FOREACH(cpu) { 829 void *ptr; 830 831 /* 832 * Per-cpu messages and event flags. 833 */ 834 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 835 PAGE_SIZE, VMBUS_PCPU_PTR(sc, message_dma, cpu), 836 BUS_DMA_WAITOK | BUS_DMA_ZERO); 837 if (ptr == NULL) 838 return ENOMEM; 839 VMBUS_PCPU_GET(sc, message, cpu) = ptr; 840 841 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 842 PAGE_SIZE, VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 843 BUS_DMA_WAITOK | BUS_DMA_ZERO); 844 if (ptr == NULL) 845 return ENOMEM; 846 VMBUS_PCPU_GET(sc, event_flags, cpu) = ptr; 847 } 848 849 evtflags = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 850 PAGE_SIZE, &sc->vmbus_evtflags_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 851 if (evtflags == NULL) 852 return ENOMEM; 853 sc->vmbus_rx_evtflags = (u_long *)evtflags; 854 sc->vmbus_tx_evtflags = (u_long *)(evtflags + (PAGE_SIZE / 2)); 855 sc->vmbus_evtflags = evtflags; 856 857 sc->vmbus_mnf1 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 858 PAGE_SIZE, &sc->vmbus_mnf1_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 859 if (sc->vmbus_mnf1 == NULL) 860 return ENOMEM; 861 862 sc->vmbus_mnf2 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 863 sizeof(struct vmbus_mnf), &sc->vmbus_mnf2_dma, 864 BUS_DMA_WAITOK | BUS_DMA_ZERO); 865 if (sc->vmbus_mnf2 == NULL) 866 return ENOMEM; 867 868 return 0; 869} 870 871static void 872vmbus_dma_free(struct vmbus_softc *sc) 873{ 874 int cpu; 875 876 if (sc->vmbus_evtflags != NULL) { 877 hyperv_dmamem_free(&sc->vmbus_evtflags_dma, sc->vmbus_evtflags); 878 sc->vmbus_evtflags = NULL; 879 sc->vmbus_rx_evtflags = NULL; 880 sc->vmbus_tx_evtflags = NULL; 881 } 882 if (sc->vmbus_mnf1 != NULL) { 883 hyperv_dmamem_free(&sc->vmbus_mnf1_dma, sc->vmbus_mnf1); 884 sc->vmbus_mnf1 = NULL; 885 } 886 if (sc->vmbus_mnf2 != NULL) { 887 hyperv_dmamem_free(&sc->vmbus_mnf2_dma, sc->vmbus_mnf2); 888 sc->vmbus_mnf2 = NULL; 889 } 890 891 CPU_FOREACH(cpu) { 892 if (VMBUS_PCPU_GET(sc, message, cpu) != NULL) { 893 hyperv_dmamem_free( 894 VMBUS_PCPU_PTR(sc, message_dma, cpu), 895 VMBUS_PCPU_GET(sc, message, cpu)); 896 VMBUS_PCPU_GET(sc, message, cpu) = NULL; 897 } 898 if (VMBUS_PCPU_GET(sc, event_flags, cpu) != NULL) { 899 hyperv_dmamem_free( 900 VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 901 VMBUS_PCPU_GET(sc, event_flags, cpu)); 902 VMBUS_PCPU_GET(sc, event_flags, cpu) = NULL; 903 } 904 } 905} 906 907static int 908vmbus_intr_setup(struct vmbus_softc *sc) 909{ 910 int cpu; 911 912 CPU_FOREACH(cpu) { 913 char buf[MAXCOMLEN + 1]; 914 cpuset_t cpu_mask; 915 916 /* Allocate an interrupt counter for Hyper-V interrupt */ 917 snprintf(buf, sizeof(buf), "cpu%d:hyperv", cpu); 918 intrcnt_add(buf, VMBUS_PCPU_PTR(sc, intr_cnt, cpu)); 919 920 /* 921 * Setup taskqueue to handle events. Task will be per- 922 * channel. 923 */ 924 VMBUS_PCPU_GET(sc, event_tq, cpu) = taskqueue_create_fast( 925 "hyperv event", M_WAITOK, taskqueue_thread_enqueue, 926 VMBUS_PCPU_PTR(sc, event_tq, cpu)); 927 CPU_SETOF(cpu, &cpu_mask); 928 taskqueue_start_threads_cpuset( 929 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, &cpu_mask, 930 "hvevent%d", cpu); 931 932 /* 933 * Setup tasks and taskqueues to handle messages. 934 */ 935 VMBUS_PCPU_GET(sc, message_tq, cpu) = taskqueue_create_fast( 936 "hyperv msg", M_WAITOK, taskqueue_thread_enqueue, 937 VMBUS_PCPU_PTR(sc, message_tq, cpu)); 938 CPU_SETOF(cpu, &cpu_mask); 939 taskqueue_start_threads_cpuset( 940 VMBUS_PCPU_PTR(sc, message_tq, cpu), 1, PI_NET, &cpu_mask, 941 "hvmsg%d", cpu); 942 TASK_INIT(VMBUS_PCPU_PTR(sc, message_task, cpu), 0, 943 vmbus_msg_task, sc); 944 } 945 946 /* 947 * All Hyper-V ISR required resources are setup, now let's find a 948 * free IDT vector for Hyper-V ISR and set it up. 949 */ 950 sc->vmbus_idtvec = lapic_ipi_alloc(IDTVEC(vmbus_isr)); 951 if (sc->vmbus_idtvec < 0) { 952 device_printf(sc->vmbus_dev, "cannot find free IDT vector\n"); 953 return ENXIO; 954 } 955 if(bootverbose) { 956 device_printf(sc->vmbus_dev, "vmbus IDT vector %d\n", 957 sc->vmbus_idtvec); 958 } 959 return 0; 960} 961 962static void 963vmbus_intr_teardown(struct vmbus_softc *sc) 964{ 965 int cpu; 966 967 if (sc->vmbus_idtvec >= 0) { 968 lapic_ipi_free(sc->vmbus_idtvec); 969 sc->vmbus_idtvec = -1; 970 } 971 972 CPU_FOREACH(cpu) { 973 if (VMBUS_PCPU_GET(sc, event_tq, cpu) != NULL) { 974 taskqueue_free(VMBUS_PCPU_GET(sc, event_tq, cpu)); 975 VMBUS_PCPU_GET(sc, event_tq, cpu) = NULL; 976 } 977 if (VMBUS_PCPU_GET(sc, message_tq, cpu) != NULL) { 978 taskqueue_drain(VMBUS_PCPU_GET(sc, message_tq, cpu), 979 VMBUS_PCPU_PTR(sc, message_task, cpu)); 980 taskqueue_free(VMBUS_PCPU_GET(sc, message_tq, cpu)); 981 VMBUS_PCPU_GET(sc, message_tq, cpu) = NULL; 982 } 983 } 984} 985 986static int 987vmbus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 988{ 989 return (ENOENT); 990} 991 992static int 993vmbus_child_pnpinfo_str(device_t dev, device_t child, char *buf, size_t buflen) 994{ 995 const struct vmbus_channel *chan; 996 char guidbuf[HYPERV_GUID_STRLEN]; 997 998 chan = vmbus_get_channel(child); 999 if (chan == NULL) { 1000 /* Event timer device, which does not belong to a channel */ 1001 return (0); 1002 } 1003 1004 strlcat(buf, "classid=", buflen); 1005 hyperv_guid2str(&chan->ch_guid_type, guidbuf, sizeof(guidbuf)); 1006 strlcat(buf, guidbuf, buflen); 1007 1008 strlcat(buf, " deviceid=", buflen); 1009 hyperv_guid2str(&chan->ch_guid_inst, guidbuf, sizeof(guidbuf)); 1010 strlcat(buf, guidbuf, buflen); 1011 1012 return (0); 1013} 1014 1015int 1016vmbus_add_child(struct vmbus_channel *chan) 1017{ 1018 struct vmbus_softc *sc = chan->ch_vmbus; 1019 device_t parent = sc->vmbus_dev; 1020 int error = 0; 1021 1022 /* New channel has been offered */ 1023 vmbus_scan_newchan(sc); 1024 1025 chan->ch_dev = device_add_child(parent, NULL, -1); 1026 if (chan->ch_dev == NULL) { 1027 device_printf(parent, "device_add_child for chan%u failed\n", 1028 chan->ch_id); 1029 error = ENXIO; 1030 goto done; 1031 } 1032 device_set_ivars(chan->ch_dev, chan); 1033 1034done: 1035 /* New device has been/should be added to vmbus. */ 1036 vmbus_scan_newdev(sc); 1037 return error; 1038} 1039 1040int 1041vmbus_delete_child(struct vmbus_channel *chan) 1042{ 1043 int error; 1044 1045 if (chan->ch_dev == NULL) { 1046 /* Failed to add a device. */ 1047 return 0; 1048 } 1049 1050 /* 1051 * XXXKYS: Ensure that this is the opposite of 1052 * device_add_child() 1053 */ 1054 mtx_lock(&Giant); 1055 error = device_delete_child(chan->ch_vmbus->vmbus_dev, chan->ch_dev); 1056 mtx_unlock(&Giant); 1057 1058 return error; 1059} 1060 1061static int 1062vmbus_sysctl_version(SYSCTL_HANDLER_ARGS) 1063{ 1064 struct vmbus_softc *sc = arg1; 1065 char verstr[16]; 1066 1067 snprintf(verstr, sizeof(verstr), "%u.%u", 1068 VMBUS_VERSION_MAJOR(sc->vmbus_version), 1069 VMBUS_VERSION_MINOR(sc->vmbus_version)); 1070 return sysctl_handle_string(oidp, verstr, sizeof(verstr), req); 1071} 1072 1073static uint32_t 1074vmbus_get_version_method(device_t bus, device_t dev) 1075{ 1076 struct vmbus_softc *sc = device_get_softc(bus); 1077 1078 return sc->vmbus_version; 1079} 1080 1081static int 1082vmbus_probe_guid_method(device_t bus, device_t dev, 1083 const struct hyperv_guid *guid) 1084{ 1085 const struct vmbus_channel *chan = vmbus_get_channel(dev); 1086 1087 if (memcmp(&chan->ch_guid_type, guid, sizeof(struct hyperv_guid)) == 0) 1088 return 0; 1089 return ENXIO; 1090} 1091 1092static int 1093vmbus_probe(device_t dev) 1094{ 1095 char *id[] = { "VMBUS", NULL }; 1096 1097 if (ACPI_ID_PROBE(device_get_parent(dev), dev, id) == NULL || 1098 device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV || 1099 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1100 return (ENXIO); 1101 1102 device_set_desc(dev, "Hyper-V Vmbus"); 1103 1104 return (BUS_PROBE_DEFAULT); 1105} 1106 1107/** 1108 * @brief Main vmbus driver initialization routine. 1109 * 1110 * Here, we 1111 * - initialize the vmbus driver context 1112 * - setup various driver entry points 1113 * - invoke the vmbus hv main init routine 1114 * - get the irq resource 1115 * - invoke the vmbus to add the vmbus root device 1116 * - setup the vmbus root device 1117 * - retrieve the channel offers 1118 */ 1119static int 1120vmbus_doattach(struct vmbus_softc *sc) 1121{ 1122 struct sysctl_oid_list *child; 1123 struct sysctl_ctx_list *ctx; 1124 int ret; 1125 1126 if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED) 1127 return (0); 1128 sc->vmbus_flags |= VMBUS_FLAG_ATTACHED; 1129 1130 mtx_init(&sc->vmbus_scan_lock, "vmbus scan", NULL, MTX_DEF); 1131 sc->vmbus_gpadl = VMBUS_GPADL_START; 1132 mtx_init(&sc->vmbus_prichan_lock, "vmbus prichan", NULL, MTX_DEF); 1133 TAILQ_INIT(&sc->vmbus_prichans); 1134 sc->vmbus_chmap = malloc( 1135 sizeof(struct vmbus_channel *) * VMBUS_CHAN_MAX, M_DEVBUF, 1136 M_WAITOK | M_ZERO); 1137 1138 /* 1139 * Create context for "post message" Hypercalls 1140 */ 1141 sc->vmbus_msg_hc = vmbus_msghc_ctx_create( 1142 bus_get_dma_tag(sc->vmbus_dev)); 1143 if (sc->vmbus_msg_hc == NULL) { 1144 ret = ENXIO; 1145 goto cleanup; 1146 } 1147 1148 /* 1149 * Allocate DMA stuffs. 1150 */ 1151 ret = vmbus_dma_alloc(sc); 1152 if (ret != 0) 1153 goto cleanup; 1154 1155 /* 1156 * Setup interrupt. 1157 */ 1158 ret = vmbus_intr_setup(sc); 1159 if (ret != 0) 1160 goto cleanup; 1161 1162 /* 1163 * Setup SynIC. 1164 */ 1165 if (bootverbose) 1166 device_printf(sc->vmbus_dev, "smp_started = %d\n", smp_started); 1167 smp_rendezvous(NULL, vmbus_synic_setup, NULL, sc); 1168 sc->vmbus_flags |= VMBUS_FLAG_SYNIC; 1169 1170 /* 1171 * Initialize vmbus, e.g. connect to Hypervisor. 1172 */ 1173 ret = vmbus_init(sc); 1174 if (ret != 0) 1175 goto cleanup; 1176 1177 if (sc->vmbus_version == VMBUS_VERSION_WS2008 || 1178 sc->vmbus_version == VMBUS_VERSION_WIN7) 1179 sc->vmbus_event_proc = vmbus_event_proc_compat; 1180 else 1181 sc->vmbus_event_proc = vmbus_event_proc; 1182 1183 ret = vmbus_scan(sc); 1184 if (ret != 0) 1185 goto cleanup; 1186 1187 ctx = device_get_sysctl_ctx(sc->vmbus_dev); 1188 child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->vmbus_dev)); 1189 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "version", 1190 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, 1191 vmbus_sysctl_version, "A", "vmbus version"); 1192 1193 return (ret); 1194 1195cleanup: 1196 vmbus_intr_teardown(sc); 1197 vmbus_dma_free(sc); 1198 if (sc->vmbus_msg_hc != NULL) { 1199 vmbus_msghc_ctx_destroy(sc->vmbus_msg_hc); 1200 sc->vmbus_msg_hc = NULL; 1201 } 1202 free(sc->vmbus_chmap, M_DEVBUF); 1203 mtx_destroy(&sc->vmbus_scan_lock); 1204 mtx_destroy(&sc->vmbus_prichan_lock); 1205 1206 return (ret); 1207} 1208 1209static void 1210vmbus_event_proc_dummy(struct vmbus_softc *sc __unused, int cpu __unused) 1211{ 1212} 1213 1214static int 1215vmbus_attach(device_t dev) 1216{ 1217 vmbus_sc = device_get_softc(dev); 1218 vmbus_sc->vmbus_dev = dev; 1219 vmbus_sc->vmbus_idtvec = -1; 1220 1221 /* 1222 * Event processing logic will be configured: 1223 * - After the vmbus protocol version negotiation. 1224 * - Before we request channel offers. 1225 */ 1226 vmbus_sc->vmbus_event_proc = vmbus_event_proc_dummy; 1227 1228#ifndef EARLY_AP_STARTUP 1229 /* 1230 * If the system has already booted and thread 1231 * scheduling is possible indicated by the global 1232 * cold set to zero, we just call the driver 1233 * initialization directly. 1234 */ 1235 if (!cold) 1236#endif 1237 vmbus_doattach(vmbus_sc); 1238 1239 return (0); 1240} 1241 1242static void 1243vmbus_sysinit(void *arg __unused) 1244{ 1245 struct vmbus_softc *sc = vmbus_get_softc(); 1246 1247 if (vm_guest != VM_GUEST_HV || sc == NULL) 1248 return; 1249 1250#ifndef EARLY_AP_STARTUP 1251 /* 1252 * If the system has already booted and thread 1253 * scheduling is possible, as indicated by the 1254 * global cold set to zero, we just call the driver 1255 * initialization directly. 1256 */ 1257 if (!cold) 1258#endif 1259 vmbus_doattach(sc); 1260} 1261 1262static int 1263vmbus_detach(device_t dev) 1264{ 1265 struct vmbus_softc *sc = device_get_softc(dev); 1266 1267 vmbus_chan_destroy_all(sc); 1268 1269 vmbus_disconnect(sc); 1270 1271 if (sc->vmbus_flags & VMBUS_FLAG_SYNIC) { 1272 sc->vmbus_flags &= ~VMBUS_FLAG_SYNIC; 1273 smp_rendezvous(NULL, vmbus_synic_teardown, NULL, NULL); 1274 } 1275 1276 vmbus_intr_teardown(sc); 1277 vmbus_dma_free(sc); 1278 1279 if (sc->vmbus_msg_hc != NULL) { 1280 vmbus_msghc_ctx_destroy(sc->vmbus_msg_hc); 1281 sc->vmbus_msg_hc = NULL; 1282 } 1283 1284 free(sc->vmbus_chmap, M_DEVBUF); 1285 mtx_destroy(&sc->vmbus_scan_lock); 1286 mtx_destroy(&sc->vmbus_prichan_lock); 1287 1288 return (0); 1289} 1290 1291static device_method_t vmbus_methods[] = { 1292 /* Device interface */ 1293 DEVMETHOD(device_probe, vmbus_probe), 1294 DEVMETHOD(device_attach, vmbus_attach), 1295 DEVMETHOD(device_detach, vmbus_detach), 1296 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1297 DEVMETHOD(device_suspend, bus_generic_suspend), 1298 DEVMETHOD(device_resume, bus_generic_resume), 1299 1300 /* Bus interface */ 1301 DEVMETHOD(bus_add_child, bus_generic_add_child), 1302 DEVMETHOD(bus_print_child, bus_generic_print_child), 1303 DEVMETHOD(bus_read_ivar, vmbus_read_ivar), 1304 DEVMETHOD(bus_child_pnpinfo_str, vmbus_child_pnpinfo_str), 1305 1306 /* Vmbus interface */ 1307 DEVMETHOD(vmbus_get_version, vmbus_get_version_method), 1308 DEVMETHOD(vmbus_probe_guid, vmbus_probe_guid_method), 1309 1310 DEVMETHOD_END 1311}; 1312 1313static driver_t vmbus_driver = { 1314 "vmbus", 1315 vmbus_methods, 1316 sizeof(struct vmbus_softc) 1317}; 1318 1319static devclass_t vmbus_devclass; 1320 1321DRIVER_MODULE(vmbus, acpi, vmbus_driver, vmbus_devclass, NULL, NULL); 1322MODULE_DEPEND(vmbus, acpi, 1, 1, 1); 1323MODULE_VERSION(vmbus, 1); 1324 1325#ifndef EARLY_AP_STARTUP 1326/* 1327 * NOTE: 1328 * We have to start as the last step of SI_SUB_SMP, i.e. after SMP is 1329 * initialized. 1330 */ 1331SYSINIT(vmbus_initialize, SI_SUB_SMP, SI_ORDER_ANY, vmbus_sysinit, NULL); 1332#endif 1333