1 /*- 2 * Copyright (c) 2009-2012,2016-2017 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("$FreeBSD$"); 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/mutex.h> 42 #include <sys/smp.h> 43 #include <sys/sysctl.h> 44 #include <sys/systm.h> 45 #include <sys/taskqueue.h> 46 47 #include <machine/bus.h> 48 #include <machine/intr_machdep.h> 49 #include <machine/md_var.h> 50 #include <machine/resource.h> 51 #include <x86/include/apicvar.h> 52 53 #include <contrib/dev/acpica/include/acpi.h> 54 #include <dev/acpica/acpivar.h> 55 56 #include <dev/hyperv/include/hyperv.h> 57 #include <dev/hyperv/include/vmbus_xact.h> 58 #include <dev/hyperv/vmbus/hyperv_reg.h> 59 #include <dev/hyperv/vmbus/hyperv_var.h> 60 #include <dev/hyperv/vmbus/vmbus_reg.h> 61 #include <dev/hyperv/vmbus/vmbus_var.h> 62 #include <dev/hyperv/vmbus/vmbus_chanvar.h> 63 64 #include "acpi_if.h" 65 #include "pcib_if.h" 66 #include "vmbus_if.h" 67 68 #define VMBUS_GPADL_START 0xe1e10 69 70 struct vmbus_msghc { 71 struct vmbus_xact *mh_xact; 72 struct hypercall_postmsg_in mh_inprm_save; 73 }; 74 75 static void vmbus_identify(driver_t *, device_t); 76 static int vmbus_probe(device_t); 77 static int vmbus_attach(device_t); 78 static int vmbus_detach(device_t); 79 static int vmbus_read_ivar(device_t, device_t, int, 80 uintptr_t *); 81 static int vmbus_child_pnpinfo_str(device_t, device_t, 82 char *, size_t); 83 static struct resource *vmbus_alloc_resource(device_t dev, 84 device_t child, int type, int *rid, 85 rman_res_t start, rman_res_t end, 86 rman_res_t count, u_int flags); 87 static int vmbus_alloc_msi(device_t bus, device_t dev, 88 int count, int maxcount, int *irqs); 89 static int vmbus_release_msi(device_t bus, device_t dev, 90 int count, int *irqs); 91 static int vmbus_alloc_msix(device_t bus, device_t dev, 92 int *irq); 93 static int vmbus_release_msix(device_t bus, device_t dev, 94 int irq); 95 static int vmbus_map_msi(device_t bus, device_t dev, 96 int irq, uint64_t *addr, uint32_t *data); 97 static uint32_t vmbus_get_version_method(device_t, device_t); 98 static int vmbus_probe_guid_method(device_t, device_t, 99 const struct hyperv_guid *); 100 static uint32_t vmbus_get_vcpu_id_method(device_t bus, 101 device_t dev, int cpu); 102 static struct taskqueue *vmbus_get_eventtq_method(device_t, device_t, 103 int); 104 #ifdef EARLY_AP_STARTUP 105 static void vmbus_intrhook(void *); 106 #endif 107 108 static int vmbus_init(struct vmbus_softc *); 109 static int vmbus_connect(struct vmbus_softc *, uint32_t); 110 static int vmbus_req_channels(struct vmbus_softc *sc); 111 static void vmbus_disconnect(struct vmbus_softc *); 112 static int vmbus_scan(struct vmbus_softc *); 113 static void vmbus_scan_teardown(struct vmbus_softc *); 114 static void vmbus_scan_done(struct vmbus_softc *, 115 const struct vmbus_message *); 116 static void vmbus_chanmsg_handle(struct vmbus_softc *, 117 const struct vmbus_message *); 118 static void vmbus_msg_task(void *, int); 119 static void vmbus_synic_setup(void *); 120 static void vmbus_synic_teardown(void *); 121 static int vmbus_sysctl_version(SYSCTL_HANDLER_ARGS); 122 static int vmbus_dma_alloc(struct vmbus_softc *); 123 static void vmbus_dma_free(struct vmbus_softc *); 124 static int vmbus_intr_setup(struct vmbus_softc *); 125 static void vmbus_intr_teardown(struct vmbus_softc *); 126 static int vmbus_doattach(struct vmbus_softc *); 127 static void vmbus_event_proc_dummy(struct vmbus_softc *, 128 int); 129 130 static struct vmbus_softc *vmbus_sc; 131 132 SYSCTL_NODE(_hw, OID_AUTO, vmbus, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 133 "Hyper-V vmbus"); 134 135 static int vmbus_pin_evttask = 1; 136 SYSCTL_INT(_hw_vmbus, OID_AUTO, pin_evttask, CTLFLAG_RDTUN, 137 &vmbus_pin_evttask, 0, "Pin event tasks to their respective CPU"); 138 139 extern inthand_t IDTVEC(vmbus_isr), IDTVEC(vmbus_isr_pti); 140 141 uint32_t vmbus_current_version; 142 143 static const uint32_t vmbus_version[] = { 144 VMBUS_VERSION_WIN10, 145 VMBUS_VERSION_WIN8_1, 146 VMBUS_VERSION_WIN8, 147 VMBUS_VERSION_WIN7, 148 VMBUS_VERSION_WS2008 149 }; 150 151 static const vmbus_chanmsg_proc_t 152 vmbus_chanmsg_handlers[VMBUS_CHANMSG_TYPE_MAX] = { 153 VMBUS_CHANMSG_PROC(CHOFFER_DONE, vmbus_scan_done), 154 VMBUS_CHANMSG_PROC_WAKEUP(CONNECT_RESP) 155 }; 156 157 static device_method_t vmbus_methods[] = { 158 /* Device interface */ 159 DEVMETHOD(device_identify, vmbus_identify), 160 DEVMETHOD(device_probe, vmbus_probe), 161 DEVMETHOD(device_attach, vmbus_attach), 162 DEVMETHOD(device_detach, vmbus_detach), 163 DEVMETHOD(device_shutdown, bus_generic_shutdown), 164 DEVMETHOD(device_suspend, bus_generic_suspend), 165 DEVMETHOD(device_resume, bus_generic_resume), 166 167 /* Bus interface */ 168 DEVMETHOD(bus_add_child, bus_generic_add_child), 169 DEVMETHOD(bus_print_child, bus_generic_print_child), 170 DEVMETHOD(bus_read_ivar, vmbus_read_ivar), 171 DEVMETHOD(bus_child_pnpinfo_str, vmbus_child_pnpinfo_str), 172 DEVMETHOD(bus_alloc_resource, vmbus_alloc_resource), 173 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 174 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 175 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 176 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 177 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 178 #if __FreeBSD_version >= 1100000 179 DEVMETHOD(bus_get_cpus, bus_generic_get_cpus), 180 #endif 181 182 /* pcib interface */ 183 DEVMETHOD(pcib_alloc_msi, vmbus_alloc_msi), 184 DEVMETHOD(pcib_release_msi, vmbus_release_msi), 185 DEVMETHOD(pcib_alloc_msix, vmbus_alloc_msix), 186 DEVMETHOD(pcib_release_msix, vmbus_release_msix), 187 DEVMETHOD(pcib_map_msi, vmbus_map_msi), 188 189 /* Vmbus interface */ 190 DEVMETHOD(vmbus_get_version, vmbus_get_version_method), 191 DEVMETHOD(vmbus_probe_guid, vmbus_probe_guid_method), 192 DEVMETHOD(vmbus_get_vcpu_id, vmbus_get_vcpu_id_method), 193 DEVMETHOD(vmbus_get_event_taskq, vmbus_get_eventtq_method), 194 195 DEVMETHOD_END 196 }; 197 198 static driver_t vmbus_driver = { 199 "vmbus", 200 vmbus_methods, 201 sizeof(struct vmbus_softc) 202 }; 203 204 static devclass_t vmbus_devclass; 205 206 DRIVER_MODULE(vmbus, pcib, vmbus_driver, vmbus_devclass, NULL, NULL); 207 DRIVER_MODULE(vmbus, acpi_syscontainer, vmbus_driver, vmbus_devclass, 208 NULL, NULL); 209 210 MODULE_DEPEND(vmbus, acpi, 1, 1, 1); 211 MODULE_DEPEND(vmbus, pci, 1, 1, 1); 212 MODULE_VERSION(vmbus, 1); 213 214 static __inline struct vmbus_softc * 215 vmbus_get_softc(void) 216 { 217 return vmbus_sc; 218 } 219 220 void 221 vmbus_msghc_reset(struct vmbus_msghc *mh, size_t dsize) 222 { 223 struct hypercall_postmsg_in *inprm; 224 225 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 226 panic("invalid data size %zu", dsize); 227 228 inprm = vmbus_xact_req_data(mh->mh_xact); 229 memset(inprm, 0, HYPERCALL_POSTMSGIN_SIZE); 230 inprm->hc_connid = VMBUS_CONNID_MESSAGE; 231 inprm->hc_msgtype = HYPERV_MSGTYPE_CHANNEL; 232 inprm->hc_dsize = dsize; 233 } 234 235 struct vmbus_msghc * 236 vmbus_msghc_get(struct vmbus_softc *sc, size_t dsize) 237 { 238 struct vmbus_msghc *mh; 239 struct vmbus_xact *xact; 240 241 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 242 panic("invalid data size %zu", dsize); 243 244 xact = vmbus_xact_get(sc->vmbus_xc, 245 dsize + __offsetof(struct hypercall_postmsg_in, hc_data[0])); 246 if (xact == NULL) 247 return (NULL); 248 249 mh = vmbus_xact_priv(xact, sizeof(*mh)); 250 mh->mh_xact = xact; 251 252 vmbus_msghc_reset(mh, dsize); 253 return (mh); 254 } 255 256 void 257 vmbus_msghc_put(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 258 { 259 260 vmbus_xact_put(mh->mh_xact); 261 } 262 263 void * 264 vmbus_msghc_dataptr(struct vmbus_msghc *mh) 265 { 266 struct hypercall_postmsg_in *inprm; 267 268 inprm = vmbus_xact_req_data(mh->mh_xact); 269 return (inprm->hc_data); 270 } 271 272 int 273 vmbus_msghc_exec_noresult(struct vmbus_msghc *mh) 274 { 275 sbintime_t time = SBT_1MS; 276 struct hypercall_postmsg_in *inprm; 277 bus_addr_t inprm_paddr; 278 int i; 279 280 inprm = vmbus_xact_req_data(mh->mh_xact); 281 inprm_paddr = vmbus_xact_req_paddr(mh->mh_xact); 282 283 /* 284 * Save the input parameter so that we could restore the input 285 * parameter if the Hypercall failed. 286 * 287 * XXX 288 * Is this really necessary?! i.e. Will the Hypercall ever 289 * overwrite the input parameter? 290 */ 291 memcpy(&mh->mh_inprm_save, inprm, HYPERCALL_POSTMSGIN_SIZE); 292 293 /* 294 * In order to cope with transient failures, e.g. insufficient 295 * resources on host side, we retry the post message Hypercall 296 * several times. 20 retries seem sufficient. 297 */ 298 #define HC_RETRY_MAX 20 299 300 for (i = 0; i < HC_RETRY_MAX; ++i) { 301 uint64_t status; 302 303 status = hypercall_post_message(inprm_paddr); 304 if (status == HYPERCALL_STATUS_SUCCESS) 305 return 0; 306 307 pause_sbt("hcpmsg", time, 0, C_HARDCLOCK); 308 if (time < SBT_1S * 2) 309 time *= 2; 310 311 /* Restore input parameter and try again */ 312 memcpy(inprm, &mh->mh_inprm_save, HYPERCALL_POSTMSGIN_SIZE); 313 } 314 315 #undef HC_RETRY_MAX 316 317 return EIO; 318 } 319 320 int 321 vmbus_msghc_exec(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 322 { 323 int error; 324 325 vmbus_xact_activate(mh->mh_xact); 326 error = vmbus_msghc_exec_noresult(mh); 327 if (error) 328 vmbus_xact_deactivate(mh->mh_xact); 329 return error; 330 } 331 332 void 333 vmbus_msghc_exec_cancel(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 334 { 335 336 vmbus_xact_deactivate(mh->mh_xact); 337 } 338 339 const struct vmbus_message * 340 vmbus_msghc_wait_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 341 { 342 size_t resp_len; 343 344 return (vmbus_xact_wait(mh->mh_xact, &resp_len)); 345 } 346 347 const struct vmbus_message * 348 vmbus_msghc_poll_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 349 { 350 size_t resp_len; 351 352 return (vmbus_xact_poll(mh->mh_xact, &resp_len)); 353 } 354 355 void 356 vmbus_msghc_wakeup(struct vmbus_softc *sc, const struct vmbus_message *msg) 357 { 358 359 vmbus_xact_ctx_wakeup(sc->vmbus_xc, msg, sizeof(*msg)); 360 } 361 362 uint32_t 363 vmbus_gpadl_alloc(struct vmbus_softc *sc) 364 { 365 uint32_t gpadl; 366 367 again: 368 gpadl = atomic_fetchadd_int(&sc->vmbus_gpadl, 1); 369 if (gpadl == 0) 370 goto again; 371 return (gpadl); 372 } 373 374 static int 375 vmbus_connect(struct vmbus_softc *sc, uint32_t version) 376 { 377 struct vmbus_chanmsg_connect *req; 378 const struct vmbus_message *msg; 379 struct vmbus_msghc *mh; 380 int error, done = 0; 381 382 mh = vmbus_msghc_get(sc, sizeof(*req)); 383 if (mh == NULL) 384 return ENXIO; 385 386 req = vmbus_msghc_dataptr(mh); 387 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CONNECT; 388 req->chm_ver = version; 389 req->chm_evtflags = sc->vmbus_evtflags_dma.hv_paddr; 390 req->chm_mnf1 = sc->vmbus_mnf1_dma.hv_paddr; 391 req->chm_mnf2 = sc->vmbus_mnf2_dma.hv_paddr; 392 393 error = vmbus_msghc_exec(sc, mh); 394 if (error) { 395 vmbus_msghc_put(sc, mh); 396 return error; 397 } 398 399 msg = vmbus_msghc_wait_result(sc, mh); 400 done = ((const struct vmbus_chanmsg_connect_resp *) 401 msg->msg_data)->chm_done; 402 403 vmbus_msghc_put(sc, mh); 404 405 return (done ? 0 : EOPNOTSUPP); 406 } 407 408 static int 409 vmbus_init(struct vmbus_softc *sc) 410 { 411 int i; 412 413 for (i = 0; i < nitems(vmbus_version); ++i) { 414 int error; 415 416 error = vmbus_connect(sc, vmbus_version[i]); 417 if (!error) { 418 vmbus_current_version = vmbus_version[i]; 419 sc->vmbus_version = vmbus_version[i]; 420 device_printf(sc->vmbus_dev, "version %u.%u\n", 421 VMBUS_VERSION_MAJOR(sc->vmbus_version), 422 VMBUS_VERSION_MINOR(sc->vmbus_version)); 423 return 0; 424 } 425 } 426 return ENXIO; 427 } 428 429 static void 430 vmbus_disconnect(struct vmbus_softc *sc) 431 { 432 struct vmbus_chanmsg_disconnect *req; 433 struct vmbus_msghc *mh; 434 int error; 435 436 mh = vmbus_msghc_get(sc, sizeof(*req)); 437 if (mh == NULL) { 438 device_printf(sc->vmbus_dev, 439 "can not get msg hypercall for disconnect\n"); 440 return; 441 } 442 443 req = vmbus_msghc_dataptr(mh); 444 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_DISCONNECT; 445 446 error = vmbus_msghc_exec_noresult(mh); 447 vmbus_msghc_put(sc, mh); 448 449 if (error) { 450 device_printf(sc->vmbus_dev, 451 "disconnect msg hypercall failed\n"); 452 } 453 } 454 455 static int 456 vmbus_req_channels(struct vmbus_softc *sc) 457 { 458 struct vmbus_chanmsg_chrequest *req; 459 struct vmbus_msghc *mh; 460 int error; 461 462 mh = vmbus_msghc_get(sc, sizeof(*req)); 463 if (mh == NULL) 464 return ENXIO; 465 466 req = vmbus_msghc_dataptr(mh); 467 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHREQUEST; 468 469 error = vmbus_msghc_exec_noresult(mh); 470 vmbus_msghc_put(sc, mh); 471 472 return error; 473 } 474 475 static void 476 vmbus_scan_done_task(void *xsc, int pending __unused) 477 { 478 struct vmbus_softc *sc = xsc; 479 480 mtx_lock(&Giant); 481 sc->vmbus_scandone = true; 482 mtx_unlock(&Giant); 483 wakeup(&sc->vmbus_scandone); 484 } 485 486 static void 487 vmbus_scan_done(struct vmbus_softc *sc, 488 const struct vmbus_message *msg __unused) 489 { 490 491 taskqueue_enqueue(sc->vmbus_devtq, &sc->vmbus_scandone_task); 492 } 493 494 static int 495 vmbus_scan(struct vmbus_softc *sc) 496 { 497 int error; 498 499 /* 500 * Identify, probe and attach for non-channel devices. 501 */ 502 bus_generic_probe(sc->vmbus_dev); 503 bus_generic_attach(sc->vmbus_dev); 504 505 /* 506 * This taskqueue serializes vmbus devices' attach and detach 507 * for channel offer and rescind messages. 508 */ 509 sc->vmbus_devtq = taskqueue_create("vmbus dev", M_WAITOK, 510 taskqueue_thread_enqueue, &sc->vmbus_devtq); 511 taskqueue_start_threads(&sc->vmbus_devtq, 1, PI_NET, "vmbusdev"); 512 TASK_INIT(&sc->vmbus_scandone_task, 0, vmbus_scan_done_task, sc); 513 514 /* 515 * This taskqueue handles sub-channel detach, so that vmbus 516 * device's detach running in vmbus_devtq can drain its sub- 517 * channels. 518 */ 519 sc->vmbus_subchtq = taskqueue_create("vmbus subch", M_WAITOK, 520 taskqueue_thread_enqueue, &sc->vmbus_subchtq); 521 taskqueue_start_threads(&sc->vmbus_subchtq, 1, PI_NET, "vmbussch"); 522 523 /* 524 * Start vmbus scanning. 525 */ 526 error = vmbus_req_channels(sc); 527 if (error) { 528 device_printf(sc->vmbus_dev, "channel request failed: %d\n", 529 error); 530 return (error); 531 } 532 533 /* 534 * Wait for all vmbus devices from the initial channel offers to be 535 * attached. 536 */ 537 GIANT_REQUIRED; 538 while (!sc->vmbus_scandone) 539 mtx_sleep(&sc->vmbus_scandone, &Giant, 0, "vmbusdev", 0); 540 541 if (bootverbose) { 542 device_printf(sc->vmbus_dev, "device scan, probe and attach " 543 "done\n"); 544 } 545 return (0); 546 } 547 548 static void 549 vmbus_scan_teardown(struct vmbus_softc *sc) 550 { 551 552 GIANT_REQUIRED; 553 if (sc->vmbus_devtq != NULL) { 554 mtx_unlock(&Giant); 555 taskqueue_free(sc->vmbus_devtq); 556 mtx_lock(&Giant); 557 sc->vmbus_devtq = NULL; 558 } 559 if (sc->vmbus_subchtq != NULL) { 560 mtx_unlock(&Giant); 561 taskqueue_free(sc->vmbus_subchtq); 562 mtx_lock(&Giant); 563 sc->vmbus_subchtq = NULL; 564 } 565 } 566 567 static void 568 vmbus_chanmsg_handle(struct vmbus_softc *sc, const struct vmbus_message *msg) 569 { 570 vmbus_chanmsg_proc_t msg_proc; 571 uint32_t msg_type; 572 573 msg_type = ((const struct vmbus_chanmsg_hdr *)msg->msg_data)->chm_type; 574 if (msg_type >= VMBUS_CHANMSG_TYPE_MAX) { 575 device_printf(sc->vmbus_dev, "unknown message type 0x%x\n", 576 msg_type); 577 return; 578 } 579 580 msg_proc = vmbus_chanmsg_handlers[msg_type]; 581 if (msg_proc != NULL) 582 msg_proc(sc, msg); 583 584 /* Channel specific processing */ 585 vmbus_chan_msgproc(sc, msg); 586 } 587 588 static void 589 vmbus_msg_task(void *xsc, int pending __unused) 590 { 591 struct vmbus_softc *sc = xsc; 592 volatile struct vmbus_message *msg; 593 594 msg = VMBUS_PCPU_GET(sc, message, curcpu) + VMBUS_SINT_MESSAGE; 595 for (;;) { 596 if (msg->msg_type == HYPERV_MSGTYPE_NONE) { 597 /* No message */ 598 break; 599 } else if (msg->msg_type == HYPERV_MSGTYPE_CHANNEL) { 600 /* Channel message */ 601 vmbus_chanmsg_handle(sc, 602 __DEVOLATILE(const struct vmbus_message *, msg)); 603 } 604 605 msg->msg_type = HYPERV_MSGTYPE_NONE; 606 /* 607 * Make sure the write to msg_type (i.e. set to 608 * HYPERV_MSGTYPE_NONE) happens before we read the 609 * msg_flags and EOMing. Otherwise, the EOMing will 610 * not deliver any more messages since there is no 611 * empty slot 612 * 613 * NOTE: 614 * mb() is used here, since atomic_thread_fence_seq_cst() 615 * will become compiler fence on UP kernel. 616 */ 617 mb(); 618 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 619 /* 620 * This will cause message queue rescan to possibly 621 * deliver another msg from the hypervisor 622 */ 623 wrmsr(MSR_HV_EOM, 0); 624 } 625 } 626 } 627 628 static __inline int 629 vmbus_handle_intr1(struct vmbus_softc *sc, struct trapframe *frame, int cpu) 630 { 631 volatile struct vmbus_message *msg; 632 struct vmbus_message *msg_base; 633 634 msg_base = VMBUS_PCPU_GET(sc, message, cpu); 635 636 /* 637 * Check event timer. 638 * 639 * TODO: move this to independent IDT vector. 640 */ 641 msg = msg_base + VMBUS_SINT_TIMER; 642 if (msg->msg_type == HYPERV_MSGTYPE_TIMER_EXPIRED) { 643 msg->msg_type = HYPERV_MSGTYPE_NONE; 644 645 vmbus_et_intr(frame); 646 647 /* 648 * Make sure the write to msg_type (i.e. set to 649 * HYPERV_MSGTYPE_NONE) happens before we read the 650 * msg_flags and EOMing. Otherwise, the EOMing will 651 * not deliver any more messages since there is no 652 * empty slot 653 * 654 * NOTE: 655 * mb() is used here, since atomic_thread_fence_seq_cst() 656 * will become compiler fence on UP kernel. 657 */ 658 mb(); 659 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 660 /* 661 * This will cause message queue rescan to possibly 662 * deliver another msg from the hypervisor 663 */ 664 wrmsr(MSR_HV_EOM, 0); 665 } 666 } 667 668 /* 669 * Check events. Hot path for network and storage I/O data; high rate. 670 * 671 * NOTE: 672 * As recommended by the Windows guest fellows, we check events before 673 * checking messages. 674 */ 675 sc->vmbus_event_proc(sc, cpu); 676 677 /* 678 * Check messages. Mainly management stuffs; ultra low rate. 679 */ 680 msg = msg_base + VMBUS_SINT_MESSAGE; 681 if (__predict_false(msg->msg_type != HYPERV_MSGTYPE_NONE)) { 682 taskqueue_enqueue(VMBUS_PCPU_GET(sc, message_tq, cpu), 683 VMBUS_PCPU_PTR(sc, message_task, cpu)); 684 } 685 686 return (FILTER_HANDLED); 687 } 688 689 void 690 vmbus_handle_intr(struct trapframe *trap_frame) 691 { 692 struct vmbus_softc *sc = vmbus_get_softc(); 693 int cpu = curcpu; 694 695 /* 696 * Disable preemption. 697 */ 698 critical_enter(); 699 700 /* 701 * Do a little interrupt counting. 702 */ 703 (*VMBUS_PCPU_GET(sc, intr_cnt, cpu))++; 704 705 vmbus_handle_intr1(sc, trap_frame, cpu); 706 707 /* 708 * Enable preemption. 709 */ 710 critical_exit(); 711 } 712 713 static void 714 vmbus_synic_setup(void *xsc) 715 { 716 struct vmbus_softc *sc = xsc; 717 int cpu = curcpu; 718 uint64_t val, orig; 719 uint32_t sint; 720 721 if (hyperv_features & CPUID_HV_MSR_VP_INDEX) { 722 /* Save virtual processor id. */ 723 VMBUS_PCPU_GET(sc, vcpuid, cpu) = rdmsr(MSR_HV_VP_INDEX); 724 } else { 725 /* Set virtual processor id to 0 for compatibility. */ 726 VMBUS_PCPU_GET(sc, vcpuid, cpu) = 0; 727 } 728 729 /* 730 * Setup the SynIC message. 731 */ 732 orig = rdmsr(MSR_HV_SIMP); 733 val = MSR_HV_SIMP_ENABLE | (orig & MSR_HV_SIMP_RSVD_MASK) | 734 ((VMBUS_PCPU_GET(sc, message_dma.hv_paddr, cpu) >> PAGE_SHIFT) << 735 MSR_HV_SIMP_PGSHIFT); 736 wrmsr(MSR_HV_SIMP, val); 737 738 /* 739 * Setup the SynIC event flags. 740 */ 741 orig = rdmsr(MSR_HV_SIEFP); 742 val = MSR_HV_SIEFP_ENABLE | (orig & MSR_HV_SIEFP_RSVD_MASK) | 743 ((VMBUS_PCPU_GET(sc, event_flags_dma.hv_paddr, cpu) 744 >> PAGE_SHIFT) << MSR_HV_SIEFP_PGSHIFT); 745 wrmsr(MSR_HV_SIEFP, val); 746 747 748 /* 749 * Configure and unmask SINT for message and event flags. 750 */ 751 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 752 orig = rdmsr(sint); 753 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 754 (orig & MSR_HV_SINT_RSVD_MASK); 755 wrmsr(sint, val); 756 757 /* 758 * Configure and unmask SINT for timer. 759 */ 760 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 761 orig = rdmsr(sint); 762 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 763 (orig & MSR_HV_SINT_RSVD_MASK); 764 wrmsr(sint, val); 765 766 /* 767 * All done; enable SynIC. 768 */ 769 orig = rdmsr(MSR_HV_SCONTROL); 770 val = MSR_HV_SCTRL_ENABLE | (orig & MSR_HV_SCTRL_RSVD_MASK); 771 wrmsr(MSR_HV_SCONTROL, val); 772 } 773 774 static void 775 vmbus_synic_teardown(void *arg) 776 { 777 uint64_t orig; 778 uint32_t sint; 779 780 /* 781 * Disable SynIC. 782 */ 783 orig = rdmsr(MSR_HV_SCONTROL); 784 wrmsr(MSR_HV_SCONTROL, (orig & MSR_HV_SCTRL_RSVD_MASK)); 785 786 /* 787 * Mask message and event flags SINT. 788 */ 789 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 790 orig = rdmsr(sint); 791 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 792 793 /* 794 * Mask timer SINT. 795 */ 796 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 797 orig = rdmsr(sint); 798 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 799 800 /* 801 * Teardown SynIC message. 802 */ 803 orig = rdmsr(MSR_HV_SIMP); 804 wrmsr(MSR_HV_SIMP, (orig & MSR_HV_SIMP_RSVD_MASK)); 805 806 /* 807 * Teardown SynIC event flags. 808 */ 809 orig = rdmsr(MSR_HV_SIEFP); 810 wrmsr(MSR_HV_SIEFP, (orig & MSR_HV_SIEFP_RSVD_MASK)); 811 } 812 813 static int 814 vmbus_dma_alloc(struct vmbus_softc *sc) 815 { 816 bus_dma_tag_t parent_dtag; 817 uint8_t *evtflags; 818 int cpu; 819 820 parent_dtag = bus_get_dma_tag(sc->vmbus_dev); 821 CPU_FOREACH(cpu) { 822 void *ptr; 823 824 /* 825 * Per-cpu messages and event flags. 826 */ 827 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 828 PAGE_SIZE, VMBUS_PCPU_PTR(sc, message_dma, cpu), 829 BUS_DMA_WAITOK | BUS_DMA_ZERO); 830 if (ptr == NULL) 831 return ENOMEM; 832 VMBUS_PCPU_GET(sc, message, cpu) = ptr; 833 834 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 835 PAGE_SIZE, VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 836 BUS_DMA_WAITOK | BUS_DMA_ZERO); 837 if (ptr == NULL) 838 return ENOMEM; 839 VMBUS_PCPU_GET(sc, event_flags, cpu) = ptr; 840 } 841 842 evtflags = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 843 PAGE_SIZE, &sc->vmbus_evtflags_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 844 if (evtflags == NULL) 845 return ENOMEM; 846 sc->vmbus_rx_evtflags = (u_long *)evtflags; 847 sc->vmbus_tx_evtflags = (u_long *)(evtflags + (PAGE_SIZE / 2)); 848 sc->vmbus_evtflags = evtflags; 849 850 sc->vmbus_mnf1 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 851 PAGE_SIZE, &sc->vmbus_mnf1_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 852 if (sc->vmbus_mnf1 == NULL) 853 return ENOMEM; 854 855 sc->vmbus_mnf2 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 856 sizeof(struct vmbus_mnf), &sc->vmbus_mnf2_dma, 857 BUS_DMA_WAITOK | BUS_DMA_ZERO); 858 if (sc->vmbus_mnf2 == NULL) 859 return ENOMEM; 860 861 return 0; 862 } 863 864 static void 865 vmbus_dma_free(struct vmbus_softc *sc) 866 { 867 int cpu; 868 869 if (sc->vmbus_evtflags != NULL) { 870 hyperv_dmamem_free(&sc->vmbus_evtflags_dma, sc->vmbus_evtflags); 871 sc->vmbus_evtflags = NULL; 872 sc->vmbus_rx_evtflags = NULL; 873 sc->vmbus_tx_evtflags = NULL; 874 } 875 if (sc->vmbus_mnf1 != NULL) { 876 hyperv_dmamem_free(&sc->vmbus_mnf1_dma, sc->vmbus_mnf1); 877 sc->vmbus_mnf1 = NULL; 878 } 879 if (sc->vmbus_mnf2 != NULL) { 880 hyperv_dmamem_free(&sc->vmbus_mnf2_dma, sc->vmbus_mnf2); 881 sc->vmbus_mnf2 = NULL; 882 } 883 884 CPU_FOREACH(cpu) { 885 if (VMBUS_PCPU_GET(sc, message, cpu) != NULL) { 886 hyperv_dmamem_free( 887 VMBUS_PCPU_PTR(sc, message_dma, cpu), 888 VMBUS_PCPU_GET(sc, message, cpu)); 889 VMBUS_PCPU_GET(sc, message, cpu) = NULL; 890 } 891 if (VMBUS_PCPU_GET(sc, event_flags, cpu) != NULL) { 892 hyperv_dmamem_free( 893 VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 894 VMBUS_PCPU_GET(sc, event_flags, cpu)); 895 VMBUS_PCPU_GET(sc, event_flags, cpu) = NULL; 896 } 897 } 898 } 899 900 static int 901 vmbus_intr_setup(struct vmbus_softc *sc) 902 { 903 int cpu; 904 905 CPU_FOREACH(cpu) { 906 char buf[MAXCOMLEN + 1]; 907 cpuset_t cpu_mask; 908 909 /* Allocate an interrupt counter for Hyper-V interrupt */ 910 snprintf(buf, sizeof(buf), "cpu%d:hyperv", cpu); 911 intrcnt_add(buf, VMBUS_PCPU_PTR(sc, intr_cnt, cpu)); 912 913 /* 914 * Setup taskqueue to handle events. Task will be per- 915 * channel. 916 */ 917 VMBUS_PCPU_GET(sc, event_tq, cpu) = taskqueue_create_fast( 918 "hyperv event", M_WAITOK, taskqueue_thread_enqueue, 919 VMBUS_PCPU_PTR(sc, event_tq, cpu)); 920 if (vmbus_pin_evttask) { 921 CPU_SETOF(cpu, &cpu_mask); 922 taskqueue_start_threads_cpuset( 923 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 924 &cpu_mask, "hvevent%d", cpu); 925 } else { 926 taskqueue_start_threads( 927 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 928 "hvevent%d", cpu); 929 } 930 931 /* 932 * Setup tasks and taskqueues to handle messages. 933 */ 934 VMBUS_PCPU_GET(sc, message_tq, cpu) = taskqueue_create_fast( 935 "hyperv msg", M_WAITOK, taskqueue_thread_enqueue, 936 VMBUS_PCPU_PTR(sc, message_tq, cpu)); 937 CPU_SETOF(cpu, &cpu_mask); 938 taskqueue_start_threads_cpuset( 939 VMBUS_PCPU_PTR(sc, message_tq, cpu), 1, PI_NET, &cpu_mask, 940 "hvmsg%d", cpu); 941 TASK_INIT(VMBUS_PCPU_PTR(sc, message_task, cpu), 0, 942 vmbus_msg_task, sc); 943 } 944 945 /* 946 * All Hyper-V ISR required resources are setup, now let's find a 947 * free IDT vector for Hyper-V ISR and set it up. 948 */ 949 sc->vmbus_idtvec = lapic_ipi_alloc(pti ? IDTVEC(vmbus_isr_pti) : 950 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 } 961 962 static void 963 vmbus_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 } 985 986 static int 987 vmbus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 988 { 989 return (ENOENT); 990 } 991 992 static int 993 vmbus_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 1015 int 1016 vmbus_add_child(struct vmbus_channel *chan) 1017 { 1018 struct vmbus_softc *sc = chan->ch_vmbus; 1019 device_t parent = sc->vmbus_dev; 1020 1021 mtx_lock(&Giant); 1022 1023 chan->ch_dev = device_add_child(parent, NULL, -1); 1024 if (chan->ch_dev == NULL) { 1025 mtx_unlock(&Giant); 1026 device_printf(parent, "device_add_child for chan%u failed\n", 1027 chan->ch_id); 1028 return (ENXIO); 1029 } 1030 device_set_ivars(chan->ch_dev, chan); 1031 device_probe_and_attach(chan->ch_dev); 1032 1033 mtx_unlock(&Giant); 1034 return (0); 1035 } 1036 1037 int 1038 vmbus_delete_child(struct vmbus_channel *chan) 1039 { 1040 int error = 0; 1041 1042 mtx_lock(&Giant); 1043 if (chan->ch_dev != NULL) { 1044 error = device_delete_child(chan->ch_vmbus->vmbus_dev, 1045 chan->ch_dev); 1046 chan->ch_dev = NULL; 1047 } 1048 mtx_unlock(&Giant); 1049 return (error); 1050 } 1051 1052 static int 1053 vmbus_sysctl_version(SYSCTL_HANDLER_ARGS) 1054 { 1055 struct vmbus_softc *sc = arg1; 1056 char verstr[16]; 1057 1058 snprintf(verstr, sizeof(verstr), "%u.%u", 1059 VMBUS_VERSION_MAJOR(sc->vmbus_version), 1060 VMBUS_VERSION_MINOR(sc->vmbus_version)); 1061 return sysctl_handle_string(oidp, verstr, sizeof(verstr), req); 1062 } 1063 1064 /* 1065 * We need the function to make sure the MMIO resource is allocated from the 1066 * ranges found in _CRS. 1067 * 1068 * For the release function, we can use bus_generic_release_resource(). 1069 */ 1070 static struct resource * 1071 vmbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 1072 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1073 { 1074 device_t parent = device_get_parent(dev); 1075 struct resource *res; 1076 1077 #ifdef NEW_PCIB 1078 if (type == SYS_RES_MEMORY) { 1079 struct vmbus_softc *sc = device_get_softc(dev); 1080 1081 res = pcib_host_res_alloc(&sc->vmbus_mmio_res, child, type, 1082 rid, start, end, count, flags); 1083 } else 1084 #endif 1085 { 1086 res = BUS_ALLOC_RESOURCE(parent, child, type, rid, start, 1087 end, count, flags); 1088 } 1089 1090 return (res); 1091 } 1092 1093 static int 1094 vmbus_alloc_msi(device_t bus, device_t dev, int count, int maxcount, int *irqs) 1095 { 1096 1097 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 1098 irqs)); 1099 } 1100 1101 static int 1102 vmbus_release_msi(device_t bus, device_t dev, int count, int *irqs) 1103 { 1104 1105 return (PCIB_RELEASE_MSI(device_get_parent(bus), dev, count, irqs)); 1106 } 1107 1108 static int 1109 vmbus_alloc_msix(device_t bus, device_t dev, int *irq) 1110 { 1111 1112 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 1113 } 1114 1115 static int 1116 vmbus_release_msix(device_t bus, device_t dev, int irq) 1117 { 1118 1119 return (PCIB_RELEASE_MSIX(device_get_parent(bus), dev, irq)); 1120 } 1121 1122 static int 1123 vmbus_map_msi(device_t bus, device_t dev, int irq, uint64_t *addr, 1124 uint32_t *data) 1125 { 1126 1127 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 1128 } 1129 1130 static uint32_t 1131 vmbus_get_version_method(device_t bus, device_t dev) 1132 { 1133 struct vmbus_softc *sc = device_get_softc(bus); 1134 1135 return sc->vmbus_version; 1136 } 1137 1138 static int 1139 vmbus_probe_guid_method(device_t bus, device_t dev, 1140 const struct hyperv_guid *guid) 1141 { 1142 const struct vmbus_channel *chan = vmbus_get_channel(dev); 1143 1144 if (memcmp(&chan->ch_guid_type, guid, sizeof(struct hyperv_guid)) == 0) 1145 return 0; 1146 return ENXIO; 1147 } 1148 1149 static uint32_t 1150 vmbus_get_vcpu_id_method(device_t bus, device_t dev, int cpu) 1151 { 1152 const struct vmbus_softc *sc = device_get_softc(bus); 1153 1154 return (VMBUS_PCPU_GET(sc, vcpuid, cpu)); 1155 } 1156 1157 static struct taskqueue * 1158 vmbus_get_eventtq_method(device_t bus, device_t dev __unused, int cpu) 1159 { 1160 const struct vmbus_softc *sc = device_get_softc(bus); 1161 1162 KASSERT(cpu >= 0 && cpu < mp_ncpus, ("invalid cpu%d", cpu)); 1163 return (VMBUS_PCPU_GET(sc, event_tq, cpu)); 1164 } 1165 1166 #ifdef NEW_PCIB 1167 #define VTPM_BASE_ADDR 0xfed40000 1168 #define FOUR_GB (1ULL << 32) 1169 1170 enum parse_pass { parse_64, parse_32 }; 1171 1172 struct parse_context { 1173 device_t vmbus_dev; 1174 enum parse_pass pass; 1175 }; 1176 1177 static ACPI_STATUS 1178 parse_crs(ACPI_RESOURCE *res, void *ctx) 1179 { 1180 const struct parse_context *pc = ctx; 1181 device_t vmbus_dev = pc->vmbus_dev; 1182 1183 struct vmbus_softc *sc = device_get_softc(vmbus_dev); 1184 UINT64 start, end; 1185 1186 switch (res->Type) { 1187 case ACPI_RESOURCE_TYPE_ADDRESS32: 1188 start = res->Data.Address32.Address.Minimum; 1189 end = res->Data.Address32.Address.Maximum; 1190 break; 1191 1192 case ACPI_RESOURCE_TYPE_ADDRESS64: 1193 start = res->Data.Address64.Address.Minimum; 1194 end = res->Data.Address64.Address.Maximum; 1195 break; 1196 1197 default: 1198 /* Unused types. */ 1199 return (AE_OK); 1200 } 1201 1202 /* 1203 * We don't use <1MB addresses. 1204 */ 1205 if (end < 0x100000) 1206 return (AE_OK); 1207 1208 /* Don't conflict with vTPM. */ 1209 if (end >= VTPM_BASE_ADDR && start < VTPM_BASE_ADDR) 1210 end = VTPM_BASE_ADDR - 1; 1211 1212 if ((pc->pass == parse_32 && start < FOUR_GB) || 1213 (pc->pass == parse_64 && start >= FOUR_GB)) 1214 pcib_host_res_decodes(&sc->vmbus_mmio_res, SYS_RES_MEMORY, 1215 start, end, 0); 1216 1217 return (AE_OK); 1218 } 1219 1220 static void 1221 vmbus_get_crs(device_t dev, device_t vmbus_dev, enum parse_pass pass) 1222 { 1223 struct parse_context pc; 1224 ACPI_STATUS status; 1225 1226 if (bootverbose) 1227 device_printf(dev, "walking _CRS, pass=%d\n", pass); 1228 1229 pc.vmbus_dev = vmbus_dev; 1230 pc.pass = pass; 1231 status = AcpiWalkResources(acpi_get_handle(dev), "_CRS", 1232 parse_crs, &pc); 1233 1234 if (bootverbose && ACPI_FAILURE(status)) 1235 device_printf(dev, "_CRS: not found, pass=%d\n", pass); 1236 } 1237 1238 static void 1239 vmbus_get_mmio_res_pass(device_t dev, enum parse_pass pass) 1240 { 1241 device_t acpi0, parent; 1242 1243 parent = device_get_parent(dev); 1244 1245 acpi0 = device_get_parent(parent); 1246 if (strcmp("acpi0", device_get_nameunit(acpi0)) == 0) { 1247 device_t *children; 1248 int count; 1249 1250 /* 1251 * Try to locate VMBUS resources and find _CRS on them. 1252 */ 1253 if (device_get_children(acpi0, &children, &count) == 0) { 1254 int i; 1255 1256 for (i = 0; i < count; ++i) { 1257 if (!device_is_attached(children[i])) 1258 continue; 1259 1260 if (strcmp("vmbus_res", 1261 device_get_name(children[i])) == 0) 1262 vmbus_get_crs(children[i], dev, pass); 1263 } 1264 free(children, M_TEMP); 1265 } 1266 1267 /* 1268 * Try to find _CRS on acpi. 1269 */ 1270 vmbus_get_crs(acpi0, dev, pass); 1271 } else { 1272 device_printf(dev, "not grandchild of acpi\n"); 1273 } 1274 1275 /* 1276 * Try to find _CRS on parent. 1277 */ 1278 vmbus_get_crs(parent, dev, pass); 1279 } 1280 1281 static void 1282 vmbus_get_mmio_res(device_t dev) 1283 { 1284 struct vmbus_softc *sc = device_get_softc(dev); 1285 /* 1286 * We walk the resources twice to make sure that: in the resource 1287 * list, the 32-bit resources appear behind the 64-bit resources. 1288 * NB: resource_list_add() uses INSERT_TAIL. This way, when we 1289 * iterate through the list to find a range for a 64-bit BAR in 1290 * vmbus_alloc_resource(), we can make sure we try to use >4GB 1291 * ranges first. 1292 */ 1293 pcib_host_res_init(dev, &sc->vmbus_mmio_res); 1294 1295 vmbus_get_mmio_res_pass(dev, parse_64); 1296 vmbus_get_mmio_res_pass(dev, parse_32); 1297 } 1298 1299 static void 1300 vmbus_free_mmio_res(device_t dev) 1301 { 1302 struct vmbus_softc *sc = device_get_softc(dev); 1303 1304 pcib_host_res_free(dev, &sc->vmbus_mmio_res); 1305 } 1306 #endif /* NEW_PCIB */ 1307 1308 static void 1309 vmbus_identify(driver_t *driver, device_t parent) 1310 { 1311 1312 if (device_get_unit(parent) != 0 || vm_guest != VM_GUEST_HV || 1313 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1314 return; 1315 device_add_child(parent, "vmbus", -1); 1316 } 1317 1318 static int 1319 vmbus_probe(device_t dev) 1320 { 1321 1322 if (device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV || 1323 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1324 return (ENXIO); 1325 1326 device_set_desc(dev, "Hyper-V Vmbus"); 1327 return (BUS_PROBE_DEFAULT); 1328 } 1329 1330 /** 1331 * @brief Main vmbus driver initialization routine. 1332 * 1333 * Here, we 1334 * - initialize the vmbus driver context 1335 * - setup various driver entry points 1336 * - invoke the vmbus hv main init routine 1337 * - get the irq resource 1338 * - invoke the vmbus to add the vmbus root device 1339 * - setup the vmbus root device 1340 * - retrieve the channel offers 1341 */ 1342 static int 1343 vmbus_doattach(struct vmbus_softc *sc) 1344 { 1345 struct sysctl_oid_list *child; 1346 struct sysctl_ctx_list *ctx; 1347 int ret; 1348 1349 if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED) 1350 return (0); 1351 1352 #ifdef NEW_PCIB 1353 vmbus_get_mmio_res(sc->vmbus_dev); 1354 #endif 1355 1356 sc->vmbus_flags |= VMBUS_FLAG_ATTACHED; 1357 1358 sc->vmbus_gpadl = VMBUS_GPADL_START; 1359 mtx_init(&sc->vmbus_prichan_lock, "vmbus prichan", NULL, MTX_DEF); 1360 TAILQ_INIT(&sc->vmbus_prichans); 1361 mtx_init(&sc->vmbus_chan_lock, "vmbus channel", NULL, MTX_DEF); 1362 TAILQ_INIT(&sc->vmbus_chans); 1363 sc->vmbus_chmap = malloc( 1364 sizeof(struct vmbus_channel *) * VMBUS_CHAN_MAX, M_DEVBUF, 1365 M_WAITOK | M_ZERO); 1366 1367 /* 1368 * Create context for "post message" Hypercalls 1369 */ 1370 sc->vmbus_xc = vmbus_xact_ctx_create(bus_get_dma_tag(sc->vmbus_dev), 1371 HYPERCALL_POSTMSGIN_SIZE, VMBUS_MSG_SIZE, 1372 sizeof(struct vmbus_msghc)); 1373 if (sc->vmbus_xc == NULL) { 1374 ret = ENXIO; 1375 goto cleanup; 1376 } 1377 1378 /* 1379 * Allocate DMA stuffs. 1380 */ 1381 ret = vmbus_dma_alloc(sc); 1382 if (ret != 0) 1383 goto cleanup; 1384 1385 /* 1386 * Setup interrupt. 1387 */ 1388 ret = vmbus_intr_setup(sc); 1389 if (ret != 0) 1390 goto cleanup; 1391 1392 /* 1393 * Setup SynIC. 1394 */ 1395 if (bootverbose) 1396 device_printf(sc->vmbus_dev, "smp_started = %d\n", smp_started); 1397 smp_rendezvous(NULL, vmbus_synic_setup, NULL, sc); 1398 sc->vmbus_flags |= VMBUS_FLAG_SYNIC; 1399 1400 /* 1401 * Initialize vmbus, e.g. connect to Hypervisor. 1402 */ 1403 ret = vmbus_init(sc); 1404 if (ret != 0) 1405 goto cleanup; 1406 1407 if (sc->vmbus_version == VMBUS_VERSION_WS2008 || 1408 sc->vmbus_version == VMBUS_VERSION_WIN7) 1409 sc->vmbus_event_proc = vmbus_event_proc_compat; 1410 else 1411 sc->vmbus_event_proc = vmbus_event_proc; 1412 1413 ret = vmbus_scan(sc); 1414 if (ret != 0) 1415 goto cleanup; 1416 1417 ctx = device_get_sysctl_ctx(sc->vmbus_dev); 1418 child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->vmbus_dev)); 1419 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "version", 1420 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, 1421 vmbus_sysctl_version, "A", "vmbus version"); 1422 1423 return (ret); 1424 1425 cleanup: 1426 vmbus_scan_teardown(sc); 1427 vmbus_intr_teardown(sc); 1428 vmbus_dma_free(sc); 1429 if (sc->vmbus_xc != NULL) { 1430 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1431 sc->vmbus_xc = NULL; 1432 } 1433 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1434 mtx_destroy(&sc->vmbus_prichan_lock); 1435 mtx_destroy(&sc->vmbus_chan_lock); 1436 1437 return (ret); 1438 } 1439 1440 static void 1441 vmbus_event_proc_dummy(struct vmbus_softc *sc __unused, int cpu __unused) 1442 { 1443 } 1444 1445 #ifdef EARLY_AP_STARTUP 1446 1447 static void 1448 vmbus_intrhook(void *xsc) 1449 { 1450 struct vmbus_softc *sc = xsc; 1451 1452 if (bootverbose) 1453 device_printf(sc->vmbus_dev, "intrhook\n"); 1454 vmbus_doattach(sc); 1455 config_intrhook_disestablish(&sc->vmbus_intrhook); 1456 } 1457 1458 #endif /* EARLY_AP_STARTUP */ 1459 1460 static int 1461 vmbus_attach(device_t dev) 1462 { 1463 vmbus_sc = device_get_softc(dev); 1464 vmbus_sc->vmbus_dev = dev; 1465 vmbus_sc->vmbus_idtvec = -1; 1466 1467 /* 1468 * Event processing logic will be configured: 1469 * - After the vmbus protocol version negotiation. 1470 * - Before we request channel offers. 1471 */ 1472 vmbus_sc->vmbus_event_proc = vmbus_event_proc_dummy; 1473 1474 #ifdef EARLY_AP_STARTUP 1475 /* 1476 * Defer the real attach until the pause(9) works as expected. 1477 */ 1478 vmbus_sc->vmbus_intrhook.ich_func = vmbus_intrhook; 1479 vmbus_sc->vmbus_intrhook.ich_arg = vmbus_sc; 1480 config_intrhook_establish(&vmbus_sc->vmbus_intrhook); 1481 #else /* !EARLY_AP_STARTUP */ 1482 /* 1483 * If the system has already booted and thread 1484 * scheduling is possible indicated by the global 1485 * cold set to zero, we just call the driver 1486 * initialization directly. 1487 */ 1488 if (!cold) 1489 vmbus_doattach(vmbus_sc); 1490 #endif /* EARLY_AP_STARTUP */ 1491 1492 return (0); 1493 } 1494 1495 static int 1496 vmbus_detach(device_t dev) 1497 { 1498 struct vmbus_softc *sc = device_get_softc(dev); 1499 1500 bus_generic_detach(dev); 1501 vmbus_chan_destroy_all(sc); 1502 1503 vmbus_scan_teardown(sc); 1504 1505 vmbus_disconnect(sc); 1506 1507 if (sc->vmbus_flags & VMBUS_FLAG_SYNIC) { 1508 sc->vmbus_flags &= ~VMBUS_FLAG_SYNIC; 1509 smp_rendezvous(NULL, vmbus_synic_teardown, NULL, NULL); 1510 } 1511 1512 vmbus_intr_teardown(sc); 1513 vmbus_dma_free(sc); 1514 1515 if (sc->vmbus_xc != NULL) { 1516 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1517 sc->vmbus_xc = NULL; 1518 } 1519 1520 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1521 mtx_destroy(&sc->vmbus_prichan_lock); 1522 mtx_destroy(&sc->vmbus_chan_lock); 1523 1524 #ifdef NEW_PCIB 1525 vmbus_free_mmio_res(dev); 1526 #endif 1527 1528 return (0); 1529 } 1530 1531 #ifndef EARLY_AP_STARTUP 1532 1533 static void 1534 vmbus_sysinit(void *arg __unused) 1535 { 1536 struct vmbus_softc *sc = vmbus_get_softc(); 1537 1538 if (vm_guest != VM_GUEST_HV || sc == NULL) 1539 return; 1540 1541 /* 1542 * If the system has already booted and thread 1543 * scheduling is possible, as indicated by the 1544 * global cold set to zero, we just call the driver 1545 * initialization directly. 1546 */ 1547 if (!cold) 1548 vmbus_doattach(sc); 1549 } 1550 /* 1551 * NOTE: 1552 * We have to start as the last step of SI_SUB_SMP, i.e. after SMP is 1553 * initialized. 1554 */ 1555 SYSINIT(vmbus_initialize, SI_SUB_SMP, SI_ORDER_ANY, vmbus_sysinit, NULL); 1556 1557 #endif /* !EARLY_AP_STARTUP */ 1558