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/linker.h> 39 #include <sys/lock.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/mutex.h> 43 #include <sys/sbuf.h> 44 #include <sys/smp.h> 45 #include <sys/sysctl.h> 46 #include <sys/systm.h> 47 #include <sys/taskqueue.h> 48 49 #include <vm/vm.h> 50 #include <vm/vm_param.h> 51 #include <vm/pmap.h> 52 53 #include <machine/bus.h> 54 #include <machine/intr_machdep.h> 55 #include <machine/metadata.h> 56 #include <machine/md_var.h> 57 #include <machine/resource.h> 58 #include <x86/include/apicvar.h> 59 60 #include <contrib/dev/acpica/include/acpi.h> 61 #include <dev/acpica/acpivar.h> 62 63 #include <dev/hyperv/include/hyperv.h> 64 #include <dev/hyperv/include/vmbus_xact.h> 65 #include <dev/hyperv/vmbus/hyperv_reg.h> 66 #include <dev/hyperv/vmbus/hyperv_var.h> 67 #include <dev/hyperv/vmbus/vmbus_reg.h> 68 #include <dev/hyperv/vmbus/vmbus_var.h> 69 #include <dev/hyperv/vmbus/vmbus_chanvar.h> 70 71 #include "acpi_if.h" 72 #include "pcib_if.h" 73 #include "vmbus_if.h" 74 75 #define VMBUS_GPADL_START 0xe1e10 76 77 struct vmbus_msghc { 78 struct vmbus_xact *mh_xact; 79 struct hypercall_postmsg_in mh_inprm_save; 80 }; 81 82 static void vmbus_identify(driver_t *, device_t); 83 static int vmbus_probe(device_t); 84 static int vmbus_attach(device_t); 85 static int vmbus_detach(device_t); 86 static int vmbus_read_ivar(device_t, device_t, int, 87 uintptr_t *); 88 static int vmbus_child_pnpinfo(device_t, device_t, struct sbuf *); 89 static struct resource *vmbus_alloc_resource(device_t dev, 90 device_t child, int type, int *rid, 91 rman_res_t start, rman_res_t end, 92 rman_res_t count, u_int flags); 93 static int vmbus_alloc_msi(device_t bus, device_t dev, 94 int count, int maxcount, int *irqs); 95 static int vmbus_release_msi(device_t bus, device_t dev, 96 int count, int *irqs); 97 static int vmbus_alloc_msix(device_t bus, device_t dev, 98 int *irq); 99 static int vmbus_release_msix(device_t bus, device_t dev, 100 int irq); 101 static int vmbus_map_msi(device_t bus, device_t dev, 102 int irq, uint64_t *addr, uint32_t *data); 103 static uint32_t vmbus_get_version_method(device_t, device_t); 104 static int vmbus_probe_guid_method(device_t, device_t, 105 const struct hyperv_guid *); 106 static uint32_t vmbus_get_vcpu_id_method(device_t bus, 107 device_t dev, int cpu); 108 static struct taskqueue *vmbus_get_eventtq_method(device_t, device_t, 109 int); 110 #ifdef EARLY_AP_STARTUP 111 static void vmbus_intrhook(void *); 112 #endif 113 114 static int vmbus_init(struct vmbus_softc *); 115 static int vmbus_connect(struct vmbus_softc *, uint32_t); 116 static int vmbus_req_channels(struct vmbus_softc *sc); 117 static void vmbus_disconnect(struct vmbus_softc *); 118 static int vmbus_scan(struct vmbus_softc *); 119 static void vmbus_scan_teardown(struct vmbus_softc *); 120 static void vmbus_scan_done(struct vmbus_softc *, 121 const struct vmbus_message *); 122 static void vmbus_chanmsg_handle(struct vmbus_softc *, 123 const struct vmbus_message *); 124 static void vmbus_msg_task(void *, int); 125 static void vmbus_synic_setup(void *); 126 static void vmbus_synic_teardown(void *); 127 static int vmbus_sysctl_version(SYSCTL_HANDLER_ARGS); 128 static int vmbus_dma_alloc(struct vmbus_softc *); 129 static void vmbus_dma_free(struct vmbus_softc *); 130 static int vmbus_intr_setup(struct vmbus_softc *); 131 static void vmbus_intr_teardown(struct vmbus_softc *); 132 static int vmbus_doattach(struct vmbus_softc *); 133 static void vmbus_event_proc_dummy(struct vmbus_softc *, 134 int); 135 136 static struct vmbus_softc *vmbus_sc; 137 138 SYSCTL_NODE(_hw, OID_AUTO, vmbus, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 139 "Hyper-V vmbus"); 140 141 static int vmbus_pin_evttask = 1; 142 SYSCTL_INT(_hw_vmbus, OID_AUTO, pin_evttask, CTLFLAG_RDTUN, 143 &vmbus_pin_evttask, 0, "Pin event tasks to their respective CPU"); 144 145 extern inthand_t IDTVEC(vmbus_isr), IDTVEC(vmbus_isr_pti); 146 #define VMBUS_ISR_ADDR trunc_page((uintptr_t)IDTVEC(vmbus_isr_pti)) 147 148 uint32_t vmbus_current_version; 149 150 static const uint32_t vmbus_version[] = { 151 VMBUS_VERSION_WIN10, 152 VMBUS_VERSION_WIN8_1, 153 VMBUS_VERSION_WIN8, 154 VMBUS_VERSION_WIN7, 155 VMBUS_VERSION_WS2008 156 }; 157 158 static const vmbus_chanmsg_proc_t 159 vmbus_chanmsg_handlers[VMBUS_CHANMSG_TYPE_MAX] = { 160 VMBUS_CHANMSG_PROC(CHOFFER_DONE, vmbus_scan_done), 161 VMBUS_CHANMSG_PROC_WAKEUP(CONNECT_RESP) 162 }; 163 164 static device_method_t vmbus_methods[] = { 165 /* Device interface */ 166 DEVMETHOD(device_identify, vmbus_identify), 167 DEVMETHOD(device_probe, vmbus_probe), 168 DEVMETHOD(device_attach, vmbus_attach), 169 DEVMETHOD(device_detach, vmbus_detach), 170 DEVMETHOD(device_shutdown, bus_generic_shutdown), 171 DEVMETHOD(device_suspend, bus_generic_suspend), 172 DEVMETHOD(device_resume, bus_generic_resume), 173 174 /* Bus interface */ 175 DEVMETHOD(bus_add_child, bus_generic_add_child), 176 DEVMETHOD(bus_print_child, bus_generic_print_child), 177 DEVMETHOD(bus_read_ivar, vmbus_read_ivar), 178 DEVMETHOD(bus_child_pnpinfo, vmbus_child_pnpinfo), 179 DEVMETHOD(bus_alloc_resource, vmbus_alloc_resource), 180 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 185 #if __FreeBSD_version >= 1100000 186 DEVMETHOD(bus_get_cpus, bus_generic_get_cpus), 187 #endif 188 189 /* pcib interface */ 190 DEVMETHOD(pcib_alloc_msi, vmbus_alloc_msi), 191 DEVMETHOD(pcib_release_msi, vmbus_release_msi), 192 DEVMETHOD(pcib_alloc_msix, vmbus_alloc_msix), 193 DEVMETHOD(pcib_release_msix, vmbus_release_msix), 194 DEVMETHOD(pcib_map_msi, vmbus_map_msi), 195 196 /* Vmbus interface */ 197 DEVMETHOD(vmbus_get_version, vmbus_get_version_method), 198 DEVMETHOD(vmbus_probe_guid, vmbus_probe_guid_method), 199 DEVMETHOD(vmbus_get_vcpu_id, vmbus_get_vcpu_id_method), 200 DEVMETHOD(vmbus_get_event_taskq, vmbus_get_eventtq_method), 201 202 DEVMETHOD_END 203 }; 204 205 static driver_t vmbus_driver = { 206 "vmbus", 207 vmbus_methods, 208 sizeof(struct vmbus_softc) 209 }; 210 211 static devclass_t vmbus_devclass; 212 213 DRIVER_MODULE(vmbus, pcib, vmbus_driver, vmbus_devclass, NULL, NULL); 214 DRIVER_MODULE(vmbus, acpi_syscontainer, vmbus_driver, vmbus_devclass, 215 NULL, NULL); 216 217 MODULE_DEPEND(vmbus, acpi, 1, 1, 1); 218 MODULE_DEPEND(vmbus, pci, 1, 1, 1); 219 MODULE_VERSION(vmbus, 1); 220 221 static __inline struct vmbus_softc * 222 vmbus_get_softc(void) 223 { 224 return vmbus_sc; 225 } 226 227 void 228 vmbus_msghc_reset(struct vmbus_msghc *mh, size_t dsize) 229 { 230 struct hypercall_postmsg_in *inprm; 231 232 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 233 panic("invalid data size %zu", dsize); 234 235 inprm = vmbus_xact_req_data(mh->mh_xact); 236 memset(inprm, 0, HYPERCALL_POSTMSGIN_SIZE); 237 inprm->hc_connid = VMBUS_CONNID_MESSAGE; 238 inprm->hc_msgtype = HYPERV_MSGTYPE_CHANNEL; 239 inprm->hc_dsize = dsize; 240 } 241 242 struct vmbus_msghc * 243 vmbus_msghc_get(struct vmbus_softc *sc, size_t dsize) 244 { 245 struct vmbus_msghc *mh; 246 struct vmbus_xact *xact; 247 248 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 249 panic("invalid data size %zu", dsize); 250 251 xact = vmbus_xact_get(sc->vmbus_xc, 252 dsize + __offsetof(struct hypercall_postmsg_in, hc_data[0])); 253 if (xact == NULL) 254 return (NULL); 255 256 mh = vmbus_xact_priv(xact, sizeof(*mh)); 257 mh->mh_xact = xact; 258 259 vmbus_msghc_reset(mh, dsize); 260 return (mh); 261 } 262 263 void 264 vmbus_msghc_put(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 265 { 266 267 vmbus_xact_put(mh->mh_xact); 268 } 269 270 void * 271 vmbus_msghc_dataptr(struct vmbus_msghc *mh) 272 { 273 struct hypercall_postmsg_in *inprm; 274 275 inprm = vmbus_xact_req_data(mh->mh_xact); 276 return (inprm->hc_data); 277 } 278 279 int 280 vmbus_msghc_exec_noresult(struct vmbus_msghc *mh) 281 { 282 sbintime_t time = SBT_1MS; 283 struct hypercall_postmsg_in *inprm; 284 bus_addr_t inprm_paddr; 285 int i; 286 287 inprm = vmbus_xact_req_data(mh->mh_xact); 288 inprm_paddr = vmbus_xact_req_paddr(mh->mh_xact); 289 290 /* 291 * Save the input parameter so that we could restore the input 292 * parameter if the Hypercall failed. 293 * 294 * XXX 295 * Is this really necessary?! i.e. Will the Hypercall ever 296 * overwrite the input parameter? 297 */ 298 memcpy(&mh->mh_inprm_save, inprm, HYPERCALL_POSTMSGIN_SIZE); 299 300 /* 301 * In order to cope with transient failures, e.g. insufficient 302 * resources on host side, we retry the post message Hypercall 303 * several times. 20 retries seem sufficient. 304 */ 305 #define HC_RETRY_MAX 20 306 307 for (i = 0; i < HC_RETRY_MAX; ++i) { 308 uint64_t status; 309 310 status = hypercall_post_message(inprm_paddr); 311 if (status == HYPERCALL_STATUS_SUCCESS) 312 return 0; 313 314 pause_sbt("hcpmsg", time, 0, C_HARDCLOCK); 315 if (time < SBT_1S * 2) 316 time *= 2; 317 318 /* Restore input parameter and try again */ 319 memcpy(inprm, &mh->mh_inprm_save, HYPERCALL_POSTMSGIN_SIZE); 320 } 321 322 #undef HC_RETRY_MAX 323 324 return EIO; 325 } 326 327 int 328 vmbus_msghc_exec(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 329 { 330 int error; 331 332 vmbus_xact_activate(mh->mh_xact); 333 error = vmbus_msghc_exec_noresult(mh); 334 if (error) 335 vmbus_xact_deactivate(mh->mh_xact); 336 return error; 337 } 338 339 void 340 vmbus_msghc_exec_cancel(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 341 { 342 343 vmbus_xact_deactivate(mh->mh_xact); 344 } 345 346 const struct vmbus_message * 347 vmbus_msghc_wait_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 348 { 349 size_t resp_len; 350 351 return (vmbus_xact_wait(mh->mh_xact, &resp_len)); 352 } 353 354 const struct vmbus_message * 355 vmbus_msghc_poll_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 356 { 357 size_t resp_len; 358 359 return (vmbus_xact_poll(mh->mh_xact, &resp_len)); 360 } 361 362 void 363 vmbus_msghc_wakeup(struct vmbus_softc *sc, const struct vmbus_message *msg) 364 { 365 366 vmbus_xact_ctx_wakeup(sc->vmbus_xc, msg, sizeof(*msg)); 367 } 368 369 uint32_t 370 vmbus_gpadl_alloc(struct vmbus_softc *sc) 371 { 372 uint32_t gpadl; 373 374 again: 375 gpadl = atomic_fetchadd_int(&sc->vmbus_gpadl, 1); 376 if (gpadl == 0) 377 goto again; 378 return (gpadl); 379 } 380 381 /* Used for Hyper-V socket when guest client connects to host */ 382 int 383 vmbus_req_tl_connect(struct hyperv_guid *guest_srv_id, 384 struct hyperv_guid *host_srv_id) 385 { 386 struct vmbus_softc *sc = vmbus_get_softc(); 387 struct vmbus_chanmsg_tl_connect *req; 388 struct vmbus_msghc *mh; 389 int error; 390 391 if (!sc) 392 return ENXIO; 393 394 mh = vmbus_msghc_get(sc, sizeof(*req)); 395 if (mh == NULL) { 396 device_printf(sc->vmbus_dev, 397 "can not get msg hypercall for tl connect\n"); 398 return ENXIO; 399 } 400 401 req = vmbus_msghc_dataptr(mh); 402 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_TL_CONN; 403 req->guest_endpoint_id = *guest_srv_id; 404 req->host_service_id = *host_srv_id; 405 406 error = vmbus_msghc_exec_noresult(mh); 407 vmbus_msghc_put(sc, mh); 408 409 if (error) { 410 device_printf(sc->vmbus_dev, 411 "tl connect msg hypercall failed\n"); 412 } 413 414 return error; 415 } 416 417 static int 418 vmbus_connect(struct vmbus_softc *sc, uint32_t version) 419 { 420 struct vmbus_chanmsg_connect *req; 421 const struct vmbus_message *msg; 422 struct vmbus_msghc *mh; 423 int error, done = 0; 424 425 mh = vmbus_msghc_get(sc, sizeof(*req)); 426 if (mh == NULL) 427 return ENXIO; 428 429 req = vmbus_msghc_dataptr(mh); 430 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CONNECT; 431 req->chm_ver = version; 432 req->chm_evtflags = sc->vmbus_evtflags_dma.hv_paddr; 433 req->chm_mnf1 = sc->vmbus_mnf1_dma.hv_paddr; 434 req->chm_mnf2 = sc->vmbus_mnf2_dma.hv_paddr; 435 436 error = vmbus_msghc_exec(sc, mh); 437 if (error) { 438 vmbus_msghc_put(sc, mh); 439 return error; 440 } 441 442 msg = vmbus_msghc_wait_result(sc, mh); 443 done = ((const struct vmbus_chanmsg_connect_resp *) 444 msg->msg_data)->chm_done; 445 446 vmbus_msghc_put(sc, mh); 447 448 return (done ? 0 : EOPNOTSUPP); 449 } 450 451 static int 452 vmbus_init(struct vmbus_softc *sc) 453 { 454 int i; 455 456 for (i = 0; i < nitems(vmbus_version); ++i) { 457 int error; 458 459 error = vmbus_connect(sc, vmbus_version[i]); 460 if (!error) { 461 vmbus_current_version = vmbus_version[i]; 462 sc->vmbus_version = vmbus_version[i]; 463 device_printf(sc->vmbus_dev, "version %u.%u\n", 464 VMBUS_VERSION_MAJOR(sc->vmbus_version), 465 VMBUS_VERSION_MINOR(sc->vmbus_version)); 466 return 0; 467 } 468 } 469 return ENXIO; 470 } 471 472 static void 473 vmbus_disconnect(struct vmbus_softc *sc) 474 { 475 struct vmbus_chanmsg_disconnect *req; 476 struct vmbus_msghc *mh; 477 int error; 478 479 mh = vmbus_msghc_get(sc, sizeof(*req)); 480 if (mh == NULL) { 481 device_printf(sc->vmbus_dev, 482 "can not get msg hypercall for disconnect\n"); 483 return; 484 } 485 486 req = vmbus_msghc_dataptr(mh); 487 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_DISCONNECT; 488 489 error = vmbus_msghc_exec_noresult(mh); 490 vmbus_msghc_put(sc, mh); 491 492 if (error) { 493 device_printf(sc->vmbus_dev, 494 "disconnect msg hypercall failed\n"); 495 } 496 } 497 498 static int 499 vmbus_req_channels(struct vmbus_softc *sc) 500 { 501 struct vmbus_chanmsg_chrequest *req; 502 struct vmbus_msghc *mh; 503 int error; 504 505 mh = vmbus_msghc_get(sc, sizeof(*req)); 506 if (mh == NULL) 507 return ENXIO; 508 509 req = vmbus_msghc_dataptr(mh); 510 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHREQUEST; 511 512 error = vmbus_msghc_exec_noresult(mh); 513 vmbus_msghc_put(sc, mh); 514 515 return error; 516 } 517 518 static void 519 vmbus_scan_done_task(void *xsc, int pending __unused) 520 { 521 struct vmbus_softc *sc = xsc; 522 523 mtx_lock(&Giant); 524 sc->vmbus_scandone = true; 525 mtx_unlock(&Giant); 526 wakeup(&sc->vmbus_scandone); 527 } 528 529 static void 530 vmbus_scan_done(struct vmbus_softc *sc, 531 const struct vmbus_message *msg __unused) 532 { 533 534 taskqueue_enqueue(sc->vmbus_devtq, &sc->vmbus_scandone_task); 535 } 536 537 static int 538 vmbus_scan(struct vmbus_softc *sc) 539 { 540 int error; 541 542 /* 543 * Identify, probe and attach for non-channel devices. 544 */ 545 bus_generic_probe(sc->vmbus_dev); 546 bus_generic_attach(sc->vmbus_dev); 547 548 /* 549 * This taskqueue serializes vmbus devices' attach and detach 550 * for channel offer and rescind messages. 551 */ 552 sc->vmbus_devtq = taskqueue_create("vmbus dev", M_WAITOK, 553 taskqueue_thread_enqueue, &sc->vmbus_devtq); 554 taskqueue_start_threads(&sc->vmbus_devtq, 1, PI_NET, "vmbusdev"); 555 TASK_INIT(&sc->vmbus_scandone_task, 0, vmbus_scan_done_task, sc); 556 557 /* 558 * This taskqueue handles sub-channel detach, so that vmbus 559 * device's detach running in vmbus_devtq can drain its sub- 560 * channels. 561 */ 562 sc->vmbus_subchtq = taskqueue_create("vmbus subch", M_WAITOK, 563 taskqueue_thread_enqueue, &sc->vmbus_subchtq); 564 taskqueue_start_threads(&sc->vmbus_subchtq, 1, PI_NET, "vmbussch"); 565 566 /* 567 * Start vmbus scanning. 568 */ 569 error = vmbus_req_channels(sc); 570 if (error) { 571 device_printf(sc->vmbus_dev, "channel request failed: %d\n", 572 error); 573 return (error); 574 } 575 576 /* 577 * Wait for all vmbus devices from the initial channel offers to be 578 * attached. 579 */ 580 GIANT_REQUIRED; 581 while (!sc->vmbus_scandone) 582 mtx_sleep(&sc->vmbus_scandone, &Giant, 0, "vmbusdev", 0); 583 584 if (bootverbose) { 585 device_printf(sc->vmbus_dev, "device scan, probe and attach " 586 "done\n"); 587 } 588 return (0); 589 } 590 591 static void 592 vmbus_scan_teardown(struct vmbus_softc *sc) 593 { 594 595 GIANT_REQUIRED; 596 if (sc->vmbus_devtq != NULL) { 597 mtx_unlock(&Giant); 598 taskqueue_free(sc->vmbus_devtq); 599 mtx_lock(&Giant); 600 sc->vmbus_devtq = NULL; 601 } 602 if (sc->vmbus_subchtq != NULL) { 603 mtx_unlock(&Giant); 604 taskqueue_free(sc->vmbus_subchtq); 605 mtx_lock(&Giant); 606 sc->vmbus_subchtq = NULL; 607 } 608 } 609 610 static void 611 vmbus_chanmsg_handle(struct vmbus_softc *sc, const struct vmbus_message *msg) 612 { 613 vmbus_chanmsg_proc_t msg_proc; 614 uint32_t msg_type; 615 616 msg_type = ((const struct vmbus_chanmsg_hdr *)msg->msg_data)->chm_type; 617 if (msg_type >= VMBUS_CHANMSG_TYPE_MAX) { 618 device_printf(sc->vmbus_dev, "unknown message type 0x%x\n", 619 msg_type); 620 return; 621 } 622 623 msg_proc = vmbus_chanmsg_handlers[msg_type]; 624 if (msg_proc != NULL) 625 msg_proc(sc, msg); 626 627 /* Channel specific processing */ 628 vmbus_chan_msgproc(sc, msg); 629 } 630 631 static void 632 vmbus_msg_task(void *xsc, int pending __unused) 633 { 634 struct vmbus_softc *sc = xsc; 635 volatile struct vmbus_message *msg; 636 637 msg = VMBUS_PCPU_GET(sc, message, curcpu) + VMBUS_SINT_MESSAGE; 638 for (;;) { 639 if (msg->msg_type == HYPERV_MSGTYPE_NONE) { 640 /* No message */ 641 break; 642 } else if (msg->msg_type == HYPERV_MSGTYPE_CHANNEL) { 643 /* Channel message */ 644 vmbus_chanmsg_handle(sc, 645 __DEVOLATILE(const struct vmbus_message *, msg)); 646 } 647 648 msg->msg_type = HYPERV_MSGTYPE_NONE; 649 /* 650 * Make sure the write to msg_type (i.e. set to 651 * HYPERV_MSGTYPE_NONE) happens before we read the 652 * msg_flags and EOMing. Otherwise, the EOMing will 653 * not deliver any more messages since there is no 654 * empty slot 655 * 656 * NOTE: 657 * mb() is used here, since atomic_thread_fence_seq_cst() 658 * will become compiler fence on UP kernel. 659 */ 660 mb(); 661 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 662 /* 663 * This will cause message queue rescan to possibly 664 * deliver another msg from the hypervisor 665 */ 666 wrmsr(MSR_HV_EOM, 0); 667 } 668 } 669 } 670 671 static __inline int 672 vmbus_handle_intr1(struct vmbus_softc *sc, struct trapframe *frame, int cpu) 673 { 674 volatile struct vmbus_message *msg; 675 struct vmbus_message *msg_base; 676 677 msg_base = VMBUS_PCPU_GET(sc, message, cpu); 678 679 /* 680 * Check event timer. 681 * 682 * TODO: move this to independent IDT vector. 683 */ 684 msg = msg_base + VMBUS_SINT_TIMER; 685 if (msg->msg_type == HYPERV_MSGTYPE_TIMER_EXPIRED) { 686 msg->msg_type = HYPERV_MSGTYPE_NONE; 687 688 vmbus_et_intr(frame); 689 690 /* 691 * Make sure the write to msg_type (i.e. set to 692 * HYPERV_MSGTYPE_NONE) happens before we read the 693 * msg_flags and EOMing. Otherwise, the EOMing will 694 * not deliver any more messages since there is no 695 * empty slot 696 * 697 * NOTE: 698 * mb() is used here, since atomic_thread_fence_seq_cst() 699 * will become compiler fence on UP kernel. 700 */ 701 mb(); 702 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 703 /* 704 * This will cause message queue rescan to possibly 705 * deliver another msg from the hypervisor 706 */ 707 wrmsr(MSR_HV_EOM, 0); 708 } 709 } 710 711 /* 712 * Check events. Hot path for network and storage I/O data; high rate. 713 * 714 * NOTE: 715 * As recommended by the Windows guest fellows, we check events before 716 * checking messages. 717 */ 718 sc->vmbus_event_proc(sc, cpu); 719 720 /* 721 * Check messages. Mainly management stuffs; ultra low rate. 722 */ 723 msg = msg_base + VMBUS_SINT_MESSAGE; 724 if (__predict_false(msg->msg_type != HYPERV_MSGTYPE_NONE)) { 725 taskqueue_enqueue(VMBUS_PCPU_GET(sc, message_tq, cpu), 726 VMBUS_PCPU_PTR(sc, message_task, cpu)); 727 } 728 729 return (FILTER_HANDLED); 730 } 731 732 void 733 vmbus_handle_intr(struct trapframe *trap_frame) 734 { 735 struct vmbus_softc *sc = vmbus_get_softc(); 736 int cpu = curcpu; 737 738 /* 739 * Disable preemption. 740 */ 741 critical_enter(); 742 743 /* 744 * Do a little interrupt counting. 745 */ 746 (*VMBUS_PCPU_GET(sc, intr_cnt, cpu))++; 747 748 vmbus_handle_intr1(sc, trap_frame, cpu); 749 750 /* 751 * Enable preemption. 752 */ 753 critical_exit(); 754 } 755 756 static void 757 vmbus_synic_setup(void *xsc) 758 { 759 struct vmbus_softc *sc = xsc; 760 int cpu = curcpu; 761 uint64_t val, orig; 762 uint32_t sint; 763 764 if (hyperv_features & CPUID_HV_MSR_VP_INDEX) { 765 /* Save virtual processor id. */ 766 VMBUS_PCPU_GET(sc, vcpuid, cpu) = rdmsr(MSR_HV_VP_INDEX); 767 } else { 768 /* Set virtual processor id to 0 for compatibility. */ 769 VMBUS_PCPU_GET(sc, vcpuid, cpu) = 0; 770 } 771 772 /* 773 * Setup the SynIC message. 774 */ 775 orig = rdmsr(MSR_HV_SIMP); 776 val = MSR_HV_SIMP_ENABLE | (orig & MSR_HV_SIMP_RSVD_MASK) | 777 ((VMBUS_PCPU_GET(sc, message_dma.hv_paddr, cpu) >> PAGE_SHIFT) << 778 MSR_HV_SIMP_PGSHIFT); 779 wrmsr(MSR_HV_SIMP, val); 780 781 /* 782 * Setup the SynIC event flags. 783 */ 784 orig = rdmsr(MSR_HV_SIEFP); 785 val = MSR_HV_SIEFP_ENABLE | (orig & MSR_HV_SIEFP_RSVD_MASK) | 786 ((VMBUS_PCPU_GET(sc, event_flags_dma.hv_paddr, cpu) 787 >> PAGE_SHIFT) << MSR_HV_SIEFP_PGSHIFT); 788 wrmsr(MSR_HV_SIEFP, val); 789 790 791 /* 792 * Configure and unmask SINT for message and event flags. 793 */ 794 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 795 orig = rdmsr(sint); 796 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 797 (orig & MSR_HV_SINT_RSVD_MASK); 798 wrmsr(sint, val); 799 800 /* 801 * Configure and unmask SINT for timer. 802 */ 803 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 804 orig = rdmsr(sint); 805 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 806 (orig & MSR_HV_SINT_RSVD_MASK); 807 wrmsr(sint, val); 808 809 /* 810 * All done; enable SynIC. 811 */ 812 orig = rdmsr(MSR_HV_SCONTROL); 813 val = MSR_HV_SCTRL_ENABLE | (orig & MSR_HV_SCTRL_RSVD_MASK); 814 wrmsr(MSR_HV_SCONTROL, val); 815 } 816 817 static void 818 vmbus_synic_teardown(void *arg) 819 { 820 uint64_t orig; 821 uint32_t sint; 822 823 /* 824 * Disable SynIC. 825 */ 826 orig = rdmsr(MSR_HV_SCONTROL); 827 wrmsr(MSR_HV_SCONTROL, (orig & MSR_HV_SCTRL_RSVD_MASK)); 828 829 /* 830 * Mask message and event flags SINT. 831 */ 832 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 833 orig = rdmsr(sint); 834 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 835 836 /* 837 * Mask timer SINT. 838 */ 839 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 840 orig = rdmsr(sint); 841 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 842 843 /* 844 * Teardown SynIC message. 845 */ 846 orig = rdmsr(MSR_HV_SIMP); 847 wrmsr(MSR_HV_SIMP, (orig & MSR_HV_SIMP_RSVD_MASK)); 848 849 /* 850 * Teardown SynIC event flags. 851 */ 852 orig = rdmsr(MSR_HV_SIEFP); 853 wrmsr(MSR_HV_SIEFP, (orig & MSR_HV_SIEFP_RSVD_MASK)); 854 } 855 856 static int 857 vmbus_dma_alloc(struct vmbus_softc *sc) 858 { 859 bus_dma_tag_t parent_dtag; 860 uint8_t *evtflags; 861 int cpu; 862 863 parent_dtag = bus_get_dma_tag(sc->vmbus_dev); 864 CPU_FOREACH(cpu) { 865 void *ptr; 866 867 /* 868 * Per-cpu messages and event flags. 869 */ 870 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 871 PAGE_SIZE, VMBUS_PCPU_PTR(sc, message_dma, cpu), 872 BUS_DMA_WAITOK | BUS_DMA_ZERO); 873 if (ptr == NULL) 874 return ENOMEM; 875 VMBUS_PCPU_GET(sc, message, cpu) = ptr; 876 877 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 878 PAGE_SIZE, VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 879 BUS_DMA_WAITOK | BUS_DMA_ZERO); 880 if (ptr == NULL) 881 return ENOMEM; 882 VMBUS_PCPU_GET(sc, event_flags, cpu) = ptr; 883 } 884 885 evtflags = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 886 PAGE_SIZE, &sc->vmbus_evtflags_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 887 if (evtflags == NULL) 888 return ENOMEM; 889 sc->vmbus_rx_evtflags = (u_long *)evtflags; 890 sc->vmbus_tx_evtflags = (u_long *)(evtflags + (PAGE_SIZE / 2)); 891 sc->vmbus_evtflags = evtflags; 892 893 sc->vmbus_mnf1 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 894 PAGE_SIZE, &sc->vmbus_mnf1_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 895 if (sc->vmbus_mnf1 == NULL) 896 return ENOMEM; 897 898 sc->vmbus_mnf2 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 899 sizeof(struct vmbus_mnf), &sc->vmbus_mnf2_dma, 900 BUS_DMA_WAITOK | BUS_DMA_ZERO); 901 if (sc->vmbus_mnf2 == NULL) 902 return ENOMEM; 903 904 return 0; 905 } 906 907 static void 908 vmbus_dma_free(struct vmbus_softc *sc) 909 { 910 int cpu; 911 912 if (sc->vmbus_evtflags != NULL) { 913 hyperv_dmamem_free(&sc->vmbus_evtflags_dma, sc->vmbus_evtflags); 914 sc->vmbus_evtflags = NULL; 915 sc->vmbus_rx_evtflags = NULL; 916 sc->vmbus_tx_evtflags = NULL; 917 } 918 if (sc->vmbus_mnf1 != NULL) { 919 hyperv_dmamem_free(&sc->vmbus_mnf1_dma, sc->vmbus_mnf1); 920 sc->vmbus_mnf1 = NULL; 921 } 922 if (sc->vmbus_mnf2 != NULL) { 923 hyperv_dmamem_free(&sc->vmbus_mnf2_dma, sc->vmbus_mnf2); 924 sc->vmbus_mnf2 = NULL; 925 } 926 927 CPU_FOREACH(cpu) { 928 if (VMBUS_PCPU_GET(sc, message, cpu) != NULL) { 929 hyperv_dmamem_free( 930 VMBUS_PCPU_PTR(sc, message_dma, cpu), 931 VMBUS_PCPU_GET(sc, message, cpu)); 932 VMBUS_PCPU_GET(sc, message, cpu) = NULL; 933 } 934 if (VMBUS_PCPU_GET(sc, event_flags, cpu) != NULL) { 935 hyperv_dmamem_free( 936 VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 937 VMBUS_PCPU_GET(sc, event_flags, cpu)); 938 VMBUS_PCPU_GET(sc, event_flags, cpu) = NULL; 939 } 940 } 941 } 942 943 static int 944 vmbus_intr_setup(struct vmbus_softc *sc) 945 { 946 int cpu; 947 948 CPU_FOREACH(cpu) { 949 char buf[MAXCOMLEN + 1]; 950 cpuset_t cpu_mask; 951 952 /* Allocate an interrupt counter for Hyper-V interrupt */ 953 snprintf(buf, sizeof(buf), "cpu%d:hyperv", cpu); 954 intrcnt_add(buf, VMBUS_PCPU_PTR(sc, intr_cnt, cpu)); 955 956 /* 957 * Setup taskqueue to handle events. Task will be per- 958 * channel. 959 */ 960 VMBUS_PCPU_GET(sc, event_tq, cpu) = taskqueue_create_fast( 961 "hyperv event", M_WAITOK, taskqueue_thread_enqueue, 962 VMBUS_PCPU_PTR(sc, event_tq, cpu)); 963 if (vmbus_pin_evttask) { 964 CPU_SETOF(cpu, &cpu_mask); 965 taskqueue_start_threads_cpuset( 966 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 967 &cpu_mask, "hvevent%d", cpu); 968 } else { 969 taskqueue_start_threads( 970 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 971 "hvevent%d", cpu); 972 } 973 974 /* 975 * Setup tasks and taskqueues to handle messages. 976 */ 977 VMBUS_PCPU_GET(sc, message_tq, cpu) = taskqueue_create_fast( 978 "hyperv msg", M_WAITOK, taskqueue_thread_enqueue, 979 VMBUS_PCPU_PTR(sc, message_tq, cpu)); 980 CPU_SETOF(cpu, &cpu_mask); 981 taskqueue_start_threads_cpuset( 982 VMBUS_PCPU_PTR(sc, message_tq, cpu), 1, PI_NET, &cpu_mask, 983 "hvmsg%d", cpu); 984 TASK_INIT(VMBUS_PCPU_PTR(sc, message_task, cpu), 0, 985 vmbus_msg_task, sc); 986 } 987 988 #if defined(__amd64__) && defined(KLD_MODULE) 989 pmap_pti_add_kva(VMBUS_ISR_ADDR, VMBUS_ISR_ADDR + PAGE_SIZE, true); 990 #endif 991 992 /* 993 * All Hyper-V ISR required resources are setup, now let's find a 994 * free IDT vector for Hyper-V ISR and set it up. 995 */ 996 sc->vmbus_idtvec = lapic_ipi_alloc(pti ? IDTVEC(vmbus_isr_pti) : 997 IDTVEC(vmbus_isr)); 998 if (sc->vmbus_idtvec < 0) { 999 #if defined(__amd64__) && defined(KLD_MODULE) 1000 pmap_pti_remove_kva(VMBUS_ISR_ADDR, VMBUS_ISR_ADDR + PAGE_SIZE); 1001 #endif 1002 device_printf(sc->vmbus_dev, "cannot find free IDT vector\n"); 1003 return ENXIO; 1004 } 1005 if (bootverbose) { 1006 device_printf(sc->vmbus_dev, "vmbus IDT vector %d\n", 1007 sc->vmbus_idtvec); 1008 } 1009 return 0; 1010 } 1011 1012 static void 1013 vmbus_intr_teardown(struct vmbus_softc *sc) 1014 { 1015 int cpu; 1016 1017 if (sc->vmbus_idtvec >= 0) { 1018 lapic_ipi_free(sc->vmbus_idtvec); 1019 sc->vmbus_idtvec = -1; 1020 } 1021 1022 #if defined(__amd64__) && defined(KLD_MODULE) 1023 pmap_pti_remove_kva(VMBUS_ISR_ADDR, VMBUS_ISR_ADDR + PAGE_SIZE); 1024 #endif 1025 1026 CPU_FOREACH(cpu) { 1027 if (VMBUS_PCPU_GET(sc, event_tq, cpu) != NULL) { 1028 taskqueue_free(VMBUS_PCPU_GET(sc, event_tq, cpu)); 1029 VMBUS_PCPU_GET(sc, event_tq, cpu) = NULL; 1030 } 1031 if (VMBUS_PCPU_GET(sc, message_tq, cpu) != NULL) { 1032 taskqueue_drain(VMBUS_PCPU_GET(sc, message_tq, cpu), 1033 VMBUS_PCPU_PTR(sc, message_task, cpu)); 1034 taskqueue_free(VMBUS_PCPU_GET(sc, message_tq, cpu)); 1035 VMBUS_PCPU_GET(sc, message_tq, cpu) = NULL; 1036 } 1037 } 1038 } 1039 1040 static int 1041 vmbus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 1042 { 1043 return (ENOENT); 1044 } 1045 1046 static int 1047 vmbus_child_pnpinfo(device_t dev, device_t child, struct sbuf *sb) 1048 { 1049 const struct vmbus_channel *chan; 1050 char guidbuf[HYPERV_GUID_STRLEN]; 1051 1052 chan = vmbus_get_channel(child); 1053 if (chan == NULL) { 1054 /* Event timer device, which does not belong to a channel */ 1055 return (0); 1056 } 1057 1058 hyperv_guid2str(&chan->ch_guid_type, guidbuf, sizeof(guidbuf)); 1059 sbuf_printf(sb, "classid=%s", guidbuf); 1060 1061 hyperv_guid2str(&chan->ch_guid_inst, guidbuf, sizeof(guidbuf)); 1062 sbuf_printf(sb, " deviceid=%s", guidbuf); 1063 1064 return (0); 1065 } 1066 1067 int 1068 vmbus_add_child(struct vmbus_channel *chan) 1069 { 1070 struct vmbus_softc *sc = chan->ch_vmbus; 1071 device_t parent = sc->vmbus_dev; 1072 1073 mtx_lock(&Giant); 1074 1075 chan->ch_dev = device_add_child(parent, NULL, -1); 1076 if (chan->ch_dev == NULL) { 1077 mtx_unlock(&Giant); 1078 device_printf(parent, "device_add_child for chan%u failed\n", 1079 chan->ch_id); 1080 return (ENXIO); 1081 } 1082 device_set_ivars(chan->ch_dev, chan); 1083 device_probe_and_attach(chan->ch_dev); 1084 1085 mtx_unlock(&Giant); 1086 return (0); 1087 } 1088 1089 int 1090 vmbus_delete_child(struct vmbus_channel *chan) 1091 { 1092 int error = 0; 1093 1094 mtx_lock(&Giant); 1095 if (chan->ch_dev != NULL) { 1096 error = device_delete_child(chan->ch_vmbus->vmbus_dev, 1097 chan->ch_dev); 1098 chan->ch_dev = NULL; 1099 } 1100 mtx_unlock(&Giant); 1101 return (error); 1102 } 1103 1104 static int 1105 vmbus_sysctl_version(SYSCTL_HANDLER_ARGS) 1106 { 1107 struct vmbus_softc *sc = arg1; 1108 char verstr[16]; 1109 1110 snprintf(verstr, sizeof(verstr), "%u.%u", 1111 VMBUS_VERSION_MAJOR(sc->vmbus_version), 1112 VMBUS_VERSION_MINOR(sc->vmbus_version)); 1113 return sysctl_handle_string(oidp, verstr, sizeof(verstr), req); 1114 } 1115 1116 /* 1117 * We need the function to make sure the MMIO resource is allocated from the 1118 * ranges found in _CRS. 1119 * 1120 * For the release function, we can use bus_generic_release_resource(). 1121 */ 1122 static struct resource * 1123 vmbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 1124 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1125 { 1126 device_t parent = device_get_parent(dev); 1127 struct resource *res; 1128 1129 #ifdef NEW_PCIB 1130 if (type == SYS_RES_MEMORY) { 1131 struct vmbus_softc *sc = device_get_softc(dev); 1132 1133 res = pcib_host_res_alloc(&sc->vmbus_mmio_res, child, type, 1134 rid, start, end, count, flags); 1135 } else 1136 #endif 1137 { 1138 res = BUS_ALLOC_RESOURCE(parent, child, type, rid, start, 1139 end, count, flags); 1140 } 1141 1142 return (res); 1143 } 1144 1145 static int 1146 vmbus_alloc_msi(device_t bus, device_t dev, int count, int maxcount, int *irqs) 1147 { 1148 1149 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 1150 irqs)); 1151 } 1152 1153 static int 1154 vmbus_release_msi(device_t bus, device_t dev, int count, int *irqs) 1155 { 1156 1157 return (PCIB_RELEASE_MSI(device_get_parent(bus), dev, count, irqs)); 1158 } 1159 1160 static int 1161 vmbus_alloc_msix(device_t bus, device_t dev, int *irq) 1162 { 1163 1164 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 1165 } 1166 1167 static int 1168 vmbus_release_msix(device_t bus, device_t dev, int irq) 1169 { 1170 1171 return (PCIB_RELEASE_MSIX(device_get_parent(bus), dev, irq)); 1172 } 1173 1174 static int 1175 vmbus_map_msi(device_t bus, device_t dev, int irq, uint64_t *addr, 1176 uint32_t *data) 1177 { 1178 1179 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 1180 } 1181 1182 static uint32_t 1183 vmbus_get_version_method(device_t bus, device_t dev) 1184 { 1185 struct vmbus_softc *sc = device_get_softc(bus); 1186 1187 return sc->vmbus_version; 1188 } 1189 1190 static int 1191 vmbus_probe_guid_method(device_t bus, device_t dev, 1192 const struct hyperv_guid *guid) 1193 { 1194 const struct vmbus_channel *chan = vmbus_get_channel(dev); 1195 1196 if (memcmp(&chan->ch_guid_type, guid, sizeof(struct hyperv_guid)) == 0) 1197 return 0; 1198 return ENXIO; 1199 } 1200 1201 static uint32_t 1202 vmbus_get_vcpu_id_method(device_t bus, device_t dev, int cpu) 1203 { 1204 const struct vmbus_softc *sc = device_get_softc(bus); 1205 1206 return (VMBUS_PCPU_GET(sc, vcpuid, cpu)); 1207 } 1208 1209 static struct taskqueue * 1210 vmbus_get_eventtq_method(device_t bus, device_t dev __unused, int cpu) 1211 { 1212 const struct vmbus_softc *sc = device_get_softc(bus); 1213 1214 KASSERT(cpu >= 0 && cpu < mp_ncpus, ("invalid cpu%d", cpu)); 1215 return (VMBUS_PCPU_GET(sc, event_tq, cpu)); 1216 } 1217 1218 #ifdef NEW_PCIB 1219 #define VTPM_BASE_ADDR 0xfed40000 1220 #define FOUR_GB (1ULL << 32) 1221 1222 enum parse_pass { parse_64, parse_32 }; 1223 1224 struct parse_context { 1225 device_t vmbus_dev; 1226 enum parse_pass pass; 1227 }; 1228 1229 static ACPI_STATUS 1230 parse_crs(ACPI_RESOURCE *res, void *ctx) 1231 { 1232 const struct parse_context *pc = ctx; 1233 device_t vmbus_dev = pc->vmbus_dev; 1234 1235 struct vmbus_softc *sc = device_get_softc(vmbus_dev); 1236 UINT64 start, end; 1237 1238 switch (res->Type) { 1239 case ACPI_RESOURCE_TYPE_ADDRESS32: 1240 start = res->Data.Address32.Address.Minimum; 1241 end = res->Data.Address32.Address.Maximum; 1242 break; 1243 1244 case ACPI_RESOURCE_TYPE_ADDRESS64: 1245 start = res->Data.Address64.Address.Minimum; 1246 end = res->Data.Address64.Address.Maximum; 1247 break; 1248 1249 default: 1250 /* Unused types. */ 1251 return (AE_OK); 1252 } 1253 1254 /* 1255 * We don't use <1MB addresses. 1256 */ 1257 if (end < 0x100000) 1258 return (AE_OK); 1259 1260 /* Don't conflict with vTPM. */ 1261 if (end >= VTPM_BASE_ADDR && start < VTPM_BASE_ADDR) 1262 end = VTPM_BASE_ADDR - 1; 1263 1264 if ((pc->pass == parse_32 && start < FOUR_GB) || 1265 (pc->pass == parse_64 && start >= FOUR_GB)) 1266 pcib_host_res_decodes(&sc->vmbus_mmio_res, SYS_RES_MEMORY, 1267 start, end, 0); 1268 1269 return (AE_OK); 1270 } 1271 1272 static void 1273 vmbus_get_crs(device_t dev, device_t vmbus_dev, enum parse_pass pass) 1274 { 1275 struct parse_context pc; 1276 ACPI_STATUS status; 1277 1278 if (bootverbose) 1279 device_printf(dev, "walking _CRS, pass=%d\n", pass); 1280 1281 pc.vmbus_dev = vmbus_dev; 1282 pc.pass = pass; 1283 status = AcpiWalkResources(acpi_get_handle(dev), "_CRS", 1284 parse_crs, &pc); 1285 1286 if (bootverbose && ACPI_FAILURE(status)) 1287 device_printf(dev, "_CRS: not found, pass=%d\n", pass); 1288 } 1289 1290 static void 1291 vmbus_get_mmio_res_pass(device_t dev, enum parse_pass pass) 1292 { 1293 device_t acpi0, parent; 1294 1295 parent = device_get_parent(dev); 1296 1297 acpi0 = device_get_parent(parent); 1298 if (strcmp("acpi0", device_get_nameunit(acpi0)) == 0) { 1299 device_t *children; 1300 int count; 1301 1302 /* 1303 * Try to locate VMBUS resources and find _CRS on them. 1304 */ 1305 if (device_get_children(acpi0, &children, &count) == 0) { 1306 int i; 1307 1308 for (i = 0; i < count; ++i) { 1309 if (!device_is_attached(children[i])) 1310 continue; 1311 1312 if (strcmp("vmbus_res", 1313 device_get_name(children[i])) == 0) 1314 vmbus_get_crs(children[i], dev, pass); 1315 } 1316 free(children, M_TEMP); 1317 } 1318 1319 /* 1320 * Try to find _CRS on acpi. 1321 */ 1322 vmbus_get_crs(acpi0, dev, pass); 1323 } else { 1324 device_printf(dev, "not grandchild of acpi\n"); 1325 } 1326 1327 /* 1328 * Try to find _CRS on parent. 1329 */ 1330 vmbus_get_crs(parent, dev, pass); 1331 } 1332 1333 static void 1334 vmbus_get_mmio_res(device_t dev) 1335 { 1336 struct vmbus_softc *sc = device_get_softc(dev); 1337 /* 1338 * We walk the resources twice to make sure that: in the resource 1339 * list, the 32-bit resources appear behind the 64-bit resources. 1340 * NB: resource_list_add() uses INSERT_TAIL. This way, when we 1341 * iterate through the list to find a range for a 64-bit BAR in 1342 * vmbus_alloc_resource(), we can make sure we try to use >4GB 1343 * ranges first. 1344 */ 1345 pcib_host_res_init(dev, &sc->vmbus_mmio_res); 1346 1347 vmbus_get_mmio_res_pass(dev, parse_64); 1348 vmbus_get_mmio_res_pass(dev, parse_32); 1349 } 1350 1351 /* 1352 * On Gen2 VMs, Hyper-V provides mmio space for framebuffer. 1353 * This mmio address range is not useable for other PCI devices. 1354 * Currently only efifb and vbefb drivers are using this range without 1355 * reserving it from system. 1356 * Therefore, vmbus driver reserves it before any other PCI device 1357 * drivers start to request mmio addresses. 1358 */ 1359 static struct resource *hv_fb_res; 1360 1361 static void 1362 vmbus_fb_mmio_res(device_t dev) 1363 { 1364 struct efi_fb *efifb; 1365 struct vbe_fb *vbefb; 1366 rman_res_t fb_start, fb_end, fb_count; 1367 int fb_height, fb_width; 1368 caddr_t kmdp; 1369 1370 struct vmbus_softc *sc = device_get_softc(dev); 1371 int rid = 0; 1372 1373 kmdp = preload_search_by_type("elf kernel"); 1374 if (kmdp == NULL) 1375 kmdp = preload_search_by_type("elf64 kernel"); 1376 efifb = (struct efi_fb *)preload_search_info(kmdp, 1377 MODINFO_METADATA | MODINFOMD_EFI_FB); 1378 vbefb = (struct vbe_fb *)preload_search_info(kmdp, 1379 MODINFO_METADATA | MODINFOMD_VBE_FB); 1380 if (efifb != NULL) { 1381 fb_start = efifb->fb_addr; 1382 fb_end = efifb->fb_addr + efifb->fb_size; 1383 fb_count = efifb->fb_size; 1384 fb_height = efifb->fb_height; 1385 fb_width = efifb->fb_width; 1386 } else if (vbefb != NULL) { 1387 fb_start = vbefb->fb_addr; 1388 fb_end = vbefb->fb_addr + vbefb->fb_size; 1389 fb_count = vbefb->fb_size; 1390 fb_height = vbefb->fb_height; 1391 fb_width = vbefb->fb_width; 1392 } else { 1393 if (bootverbose) 1394 device_printf(dev, 1395 "no preloaded kernel fb information\n"); 1396 /* We are on Gen1 VM, just return. */ 1397 return; 1398 } 1399 1400 if (bootverbose) 1401 device_printf(dev, 1402 "fb: fb_addr: %#jx, size: %#jx, " 1403 "actual size needed: 0x%x\n", 1404 fb_start, fb_count, fb_height * fb_width); 1405 1406 hv_fb_res = pcib_host_res_alloc(&sc->vmbus_mmio_res, dev, 1407 SYS_RES_MEMORY, &rid, fb_start, fb_end, fb_count, 1408 RF_ACTIVE | rman_make_alignment_flags(PAGE_SIZE)); 1409 1410 if (hv_fb_res && bootverbose) 1411 device_printf(dev, 1412 "successfully reserved memory for framebuffer " 1413 "starting at %#jx, size %#jx\n", 1414 fb_start, fb_count); 1415 } 1416 1417 static void 1418 vmbus_free_mmio_res(device_t dev) 1419 { 1420 struct vmbus_softc *sc = device_get_softc(dev); 1421 1422 pcib_host_res_free(dev, &sc->vmbus_mmio_res); 1423 1424 if (hv_fb_res) 1425 hv_fb_res = NULL; 1426 } 1427 #endif /* NEW_PCIB */ 1428 1429 static void 1430 vmbus_identify(driver_t *driver, device_t parent) 1431 { 1432 1433 if (device_get_unit(parent) != 0 || vm_guest != VM_GUEST_HV || 1434 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1435 return; 1436 device_add_child(parent, "vmbus", -1); 1437 } 1438 1439 static int 1440 vmbus_probe(device_t dev) 1441 { 1442 1443 if (device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV || 1444 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1445 return (ENXIO); 1446 1447 device_set_desc(dev, "Hyper-V Vmbus"); 1448 return (BUS_PROBE_DEFAULT); 1449 } 1450 1451 /** 1452 * @brief Main vmbus driver initialization routine. 1453 * 1454 * Here, we 1455 * - initialize the vmbus driver context 1456 * - setup various driver entry points 1457 * - invoke the vmbus hv main init routine 1458 * - get the irq resource 1459 * - invoke the vmbus to add the vmbus root device 1460 * - setup the vmbus root device 1461 * - retrieve the channel offers 1462 */ 1463 static int 1464 vmbus_doattach(struct vmbus_softc *sc) 1465 { 1466 struct sysctl_oid_list *child; 1467 struct sysctl_ctx_list *ctx; 1468 int ret; 1469 1470 if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED) 1471 return (0); 1472 1473 #ifdef NEW_PCIB 1474 vmbus_get_mmio_res(sc->vmbus_dev); 1475 vmbus_fb_mmio_res(sc->vmbus_dev); 1476 #endif 1477 1478 sc->vmbus_flags |= VMBUS_FLAG_ATTACHED; 1479 1480 sc->vmbus_gpadl = VMBUS_GPADL_START; 1481 mtx_init(&sc->vmbus_prichan_lock, "vmbus prichan", NULL, MTX_DEF); 1482 TAILQ_INIT(&sc->vmbus_prichans); 1483 mtx_init(&sc->vmbus_chan_lock, "vmbus channel", NULL, MTX_DEF); 1484 TAILQ_INIT(&sc->vmbus_chans); 1485 sc->vmbus_chmap = malloc( 1486 sizeof(struct vmbus_channel *) * VMBUS_CHAN_MAX, M_DEVBUF, 1487 M_WAITOK | M_ZERO); 1488 1489 /* 1490 * Create context for "post message" Hypercalls 1491 */ 1492 sc->vmbus_xc = vmbus_xact_ctx_create(bus_get_dma_tag(sc->vmbus_dev), 1493 HYPERCALL_POSTMSGIN_SIZE, VMBUS_MSG_SIZE, 1494 sizeof(struct vmbus_msghc)); 1495 if (sc->vmbus_xc == NULL) { 1496 ret = ENXIO; 1497 goto cleanup; 1498 } 1499 1500 /* 1501 * Allocate DMA stuffs. 1502 */ 1503 ret = vmbus_dma_alloc(sc); 1504 if (ret != 0) 1505 goto cleanup; 1506 1507 /* 1508 * Setup interrupt. 1509 */ 1510 ret = vmbus_intr_setup(sc); 1511 if (ret != 0) 1512 goto cleanup; 1513 1514 /* 1515 * Setup SynIC. 1516 */ 1517 if (bootverbose) 1518 device_printf(sc->vmbus_dev, "smp_started = %d\n", smp_started); 1519 smp_rendezvous(NULL, vmbus_synic_setup, NULL, sc); 1520 sc->vmbus_flags |= VMBUS_FLAG_SYNIC; 1521 1522 /* 1523 * Initialize vmbus, e.g. connect to Hypervisor. 1524 */ 1525 ret = vmbus_init(sc); 1526 if (ret != 0) 1527 goto cleanup; 1528 1529 if (sc->vmbus_version == VMBUS_VERSION_WS2008 || 1530 sc->vmbus_version == VMBUS_VERSION_WIN7) 1531 sc->vmbus_event_proc = vmbus_event_proc_compat; 1532 else 1533 sc->vmbus_event_proc = vmbus_event_proc; 1534 1535 ret = vmbus_scan(sc); 1536 if (ret != 0) 1537 goto cleanup; 1538 1539 ctx = device_get_sysctl_ctx(sc->vmbus_dev); 1540 child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->vmbus_dev)); 1541 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "version", 1542 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, 1543 vmbus_sysctl_version, "A", "vmbus version"); 1544 1545 return (ret); 1546 1547 cleanup: 1548 vmbus_scan_teardown(sc); 1549 vmbus_intr_teardown(sc); 1550 vmbus_dma_free(sc); 1551 if (sc->vmbus_xc != NULL) { 1552 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1553 sc->vmbus_xc = NULL; 1554 } 1555 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1556 mtx_destroy(&sc->vmbus_prichan_lock); 1557 mtx_destroy(&sc->vmbus_chan_lock); 1558 1559 return (ret); 1560 } 1561 1562 static void 1563 vmbus_event_proc_dummy(struct vmbus_softc *sc __unused, int cpu __unused) 1564 { 1565 } 1566 1567 #ifdef EARLY_AP_STARTUP 1568 1569 static void 1570 vmbus_intrhook(void *xsc) 1571 { 1572 struct vmbus_softc *sc = xsc; 1573 1574 if (bootverbose) 1575 device_printf(sc->vmbus_dev, "intrhook\n"); 1576 vmbus_doattach(sc); 1577 config_intrhook_disestablish(&sc->vmbus_intrhook); 1578 } 1579 1580 #endif /* EARLY_AP_STARTUP */ 1581 1582 static int 1583 vmbus_attach(device_t dev) 1584 { 1585 vmbus_sc = device_get_softc(dev); 1586 vmbus_sc->vmbus_dev = dev; 1587 vmbus_sc->vmbus_idtvec = -1; 1588 1589 /* 1590 * Event processing logic will be configured: 1591 * - After the vmbus protocol version negotiation. 1592 * - Before we request channel offers. 1593 */ 1594 vmbus_sc->vmbus_event_proc = vmbus_event_proc_dummy; 1595 1596 #ifdef EARLY_AP_STARTUP 1597 /* 1598 * Defer the real attach until the pause(9) works as expected. 1599 */ 1600 vmbus_sc->vmbus_intrhook.ich_func = vmbus_intrhook; 1601 vmbus_sc->vmbus_intrhook.ich_arg = vmbus_sc; 1602 config_intrhook_establish(&vmbus_sc->vmbus_intrhook); 1603 #else /* !EARLY_AP_STARTUP */ 1604 /* 1605 * If the system has already booted and thread 1606 * scheduling is possible indicated by the global 1607 * cold set to zero, we just call the driver 1608 * initialization directly. 1609 */ 1610 if (!cold) 1611 vmbus_doattach(vmbus_sc); 1612 #endif /* EARLY_AP_STARTUP */ 1613 1614 return (0); 1615 } 1616 1617 static int 1618 vmbus_detach(device_t dev) 1619 { 1620 struct vmbus_softc *sc = device_get_softc(dev); 1621 1622 bus_generic_detach(dev); 1623 vmbus_chan_destroy_all(sc); 1624 1625 vmbus_scan_teardown(sc); 1626 1627 vmbus_disconnect(sc); 1628 1629 if (sc->vmbus_flags & VMBUS_FLAG_SYNIC) { 1630 sc->vmbus_flags &= ~VMBUS_FLAG_SYNIC; 1631 smp_rendezvous(NULL, vmbus_synic_teardown, NULL, NULL); 1632 } 1633 1634 vmbus_intr_teardown(sc); 1635 vmbus_dma_free(sc); 1636 1637 if (sc->vmbus_xc != NULL) { 1638 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1639 sc->vmbus_xc = NULL; 1640 } 1641 1642 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1643 mtx_destroy(&sc->vmbus_prichan_lock); 1644 mtx_destroy(&sc->vmbus_chan_lock); 1645 1646 #ifdef NEW_PCIB 1647 vmbus_free_mmio_res(dev); 1648 #endif 1649 1650 return (0); 1651 } 1652 1653 #ifndef EARLY_AP_STARTUP 1654 1655 static void 1656 vmbus_sysinit(void *arg __unused) 1657 { 1658 struct vmbus_softc *sc = vmbus_get_softc(); 1659 1660 if (vm_guest != VM_GUEST_HV || sc == NULL) 1661 return; 1662 1663 /* 1664 * If the system has already booted and thread 1665 * scheduling is possible, as indicated by the 1666 * global cold set to zero, we just call the driver 1667 * initialization directly. 1668 */ 1669 if (!cold) 1670 vmbus_doattach(sc); 1671 } 1672 /* 1673 * NOTE: 1674 * We have to start as the last step of SI_SUB_SMP, i.e. after SMP is 1675 * initialized. 1676 */ 1677 SYSINIT(vmbus_initialize, SI_SUB_SMP, SI_ORDER_ANY, vmbus_sysinit, NULL); 1678 1679 #endif /* !EARLY_AP_STARTUP */ 1680