Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/hyperv/vmbus/vmbus.c
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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 #if defined(__aarch64__) 55 #include <dev/psci/smccc.h> 56 #include <dev/hyperv/vmbus/aarch64/hyperv_machdep.h> 57 #include <dev/hyperv/vmbus/aarch64/hyperv_reg.h> 58 #else 59 #include <dev/hyperv/vmbus/x86/hyperv_machdep.h> 60 #include <dev/hyperv/vmbus/x86/hyperv_reg.h> 61 #include <machine/intr_machdep.h> 62 #include <x86/include/apicvar.h> 63 #endif 64 #include <machine/metadata.h> 65 #include <machine/md_var.h> 66 #include <machine/resource.h> 67 #include <contrib/dev/acpica/include/acpi.h> 68 #include <dev/acpica/acpivar.h> 69 70 #include <dev/hyperv/include/hyperv.h> 71 #include <dev/hyperv/include/vmbus_xact.h> 72 #include <dev/hyperv/vmbus/hyperv_var.h> 73 #include <dev/hyperv/vmbus/vmbus_reg.h> 74 #include <dev/hyperv/vmbus/vmbus_var.h> 75 #include <dev/hyperv/vmbus/vmbus_chanvar.h> 76 #include <dev/hyperv/vmbus/hyperv_common_reg.h> 77 #include "acpi_if.h" 78 #include "pcib_if.h" 79 #include "vmbus_if.h" 80 81 #define VMBUS_GPADL_START 0xe1e10 82 83 struct vmbus_msghc { 84 struct vmbus_xact *mh_xact; 85 struct hypercall_postmsg_in mh_inprm_save; 86 }; 87 88 static void vmbus_identify(driver_t *, device_t); 89 static int vmbus_probe(device_t); 90 static int vmbus_attach(device_t); 91 static int vmbus_detach(device_t); 92 static int vmbus_read_ivar(device_t, device_t, int, 93 uintptr_t *); 94 static int vmbus_child_pnpinfo(device_t, device_t, struct sbuf *); 95 static struct resource *vmbus_alloc_resource(device_t dev, 96 device_t child, int type, int *rid, 97 rman_res_t start, rman_res_t end, 98 rman_res_t count, u_int flags); 99 static int vmbus_alloc_msi(device_t bus, device_t dev, 100 int count, int maxcount, int *irqs); 101 static int vmbus_release_msi(device_t bus, device_t dev, 102 int count, int *irqs); 103 static int vmbus_alloc_msix(device_t bus, device_t dev, 104 int *irq); 105 static int vmbus_release_msix(device_t bus, device_t dev, 106 int irq); 107 static int vmbus_map_msi(device_t bus, device_t dev, 108 int irq, uint64_t *addr, uint32_t *data); 109 static uint32_t vmbus_get_version_method(device_t, device_t); 110 static int vmbus_probe_guid_method(device_t, device_t, 111 const struct hyperv_guid *); 112 static uint32_t vmbus_get_vcpu_id_method(device_t bus, 113 device_t dev, int cpu); 114 static struct taskqueue *vmbus_get_eventtq_method(device_t, device_t, 115 int); 116 #if defined(EARLY_AP_STARTUP) || defined(__aarch64__) 117 static void vmbus_intrhook(void *); 118 #endif 119 120 static int vmbus_init(struct vmbus_softc *); 121 static int vmbus_connect(struct vmbus_softc *, uint32_t); 122 static int vmbus_req_channels(struct vmbus_softc *sc); 123 static void vmbus_disconnect(struct vmbus_softc *); 124 static int vmbus_scan(struct vmbus_softc *); 125 static void vmbus_scan_teardown(struct vmbus_softc *); 126 static void vmbus_scan_done(struct vmbus_softc *, 127 const struct vmbus_message *); 128 static void vmbus_chanmsg_handle(struct vmbus_softc *, 129 const struct vmbus_message *); 130 static void vmbus_msg_task(void *, int); 131 static void vmbus_synic_setup(void *); 132 static void vmbus_synic_teardown(void *); 133 static int vmbus_sysctl_version(SYSCTL_HANDLER_ARGS); 134 static int vmbus_dma_alloc(struct vmbus_softc *); 135 static void vmbus_dma_free(struct vmbus_softc *); 136 static int vmbus_intr_setup(struct vmbus_softc *); 137 static void vmbus_intr_teardown(struct vmbus_softc *); 138 static int vmbus_doattach(struct vmbus_softc *); 139 static void vmbus_event_proc_dummy(struct vmbus_softc *, 140 int); 141 static struct vmbus_softc *vmbus_sc; 142 143 SYSCTL_NODE(_hw, OID_AUTO, vmbus, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 144 "Hyper-V vmbus"); 145 146 static int vmbus_pin_evttask = 1; 147 SYSCTL_INT(_hw_vmbus, OID_AUTO, pin_evttask, CTLFLAG_RDTUN, 148 &vmbus_pin_evttask, 0, "Pin event tasks to their respective CPU"); 149 uint32_t vmbus_current_version; 150 151 static const uint32_t vmbus_version[] = { 152 VMBUS_VERSION_WIN10, 153 VMBUS_VERSION_WIN8_1, 154 VMBUS_VERSION_WIN8, 155 VMBUS_VERSION_WIN7, 156 VMBUS_VERSION_WS2008 157 }; 158 159 static const vmbus_chanmsg_proc_t 160 vmbus_chanmsg_handlers[VMBUS_CHANMSG_TYPE_MAX] = { 161 VMBUS_CHANMSG_PROC(CHOFFER_DONE, vmbus_scan_done), 162 VMBUS_CHANMSG_PROC_WAKEUP(CONNECT_RESP) 163 }; 164 165 static device_method_t vmbus_methods[] = { 166 /* Device interface */ 167 DEVMETHOD(device_identify, vmbus_identify), 168 DEVMETHOD(device_probe, vmbus_probe), 169 DEVMETHOD(device_attach, vmbus_attach), 170 DEVMETHOD(device_detach, vmbus_detach), 171 DEVMETHOD(device_shutdown, bus_generic_shutdown), 172 DEVMETHOD(device_suspend, bus_generic_suspend), 173 DEVMETHOD(device_resume, bus_generic_resume), 174 175 /* Bus interface */ 176 DEVMETHOD(bus_add_child, bus_generic_add_child), 177 DEVMETHOD(bus_print_child, bus_generic_print_child), 178 DEVMETHOD(bus_read_ivar, vmbus_read_ivar), 179 DEVMETHOD(bus_child_pnpinfo, vmbus_child_pnpinfo), 180 DEVMETHOD(bus_alloc_resource, vmbus_alloc_resource), 181 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 182 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 183 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 184 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 185 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 186 #if __FreeBSD_version >= 1100000 187 DEVMETHOD(bus_get_cpus, bus_generic_get_cpus), 188 #endif 189 190 /* pcib interface */ 191 DEVMETHOD(pcib_alloc_msi, vmbus_alloc_msi), 192 DEVMETHOD(pcib_release_msi, vmbus_release_msi), 193 DEVMETHOD(pcib_alloc_msix, vmbus_alloc_msix), 194 DEVMETHOD(pcib_release_msix, vmbus_release_msix), 195 DEVMETHOD(pcib_map_msi, vmbus_map_msi), 196 197 /* Vmbus interface */ 198 DEVMETHOD(vmbus_get_version, vmbus_get_version_method), 199 DEVMETHOD(vmbus_probe_guid, vmbus_probe_guid_method), 200 DEVMETHOD(vmbus_get_vcpu_id, vmbus_get_vcpu_id_method), 201 DEVMETHOD(vmbus_get_event_taskq, vmbus_get_eventtq_method), 202 203 DEVMETHOD_END 204 }; 205 206 static driver_t vmbus_driver = { 207 "vmbus", 208 vmbus_methods, 209 sizeof(struct vmbus_softc) 210 }; 211 212 DRIVER_MODULE(vmbus, pcib, vmbus_driver, NULL, NULL); 213 DRIVER_MODULE(vmbus, acpi_syscontainer, vmbus_driver, NULL, NULL); 214 215 MODULE_DEPEND(vmbus, acpi, 1, 1, 1); 216 MODULE_DEPEND(vmbus, pci, 1, 1, 1); 217 MODULE_VERSION(vmbus, 1); 218 219 static __inline struct vmbus_softc * 220 vmbus_get_softc(void) 221 { 222 return vmbus_sc; 223 } 224 225 void 226 vmbus_msghc_reset(struct vmbus_msghc *mh, size_t dsize) 227 { 228 struct hypercall_postmsg_in *inprm; 229 230 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 231 panic("invalid data size %zu", dsize); 232 233 inprm = vmbus_xact_req_data(mh->mh_xact); 234 memset(inprm, 0, HYPERCALL_POSTMSGIN_SIZE); 235 inprm->hc_connid = VMBUS_CONNID_MESSAGE; 236 inprm->hc_msgtype = HYPERV_MSGTYPE_CHANNEL; 237 inprm->hc_dsize = dsize; 238 } 239 240 struct vmbus_msghc * 241 vmbus_msghc_get(struct vmbus_softc *sc, size_t dsize) 242 { 243 struct vmbus_msghc *mh; 244 struct vmbus_xact *xact; 245 246 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 247 panic("invalid data size %zu", dsize); 248 249 xact = vmbus_xact_get(sc->vmbus_xc, 250 dsize + __offsetof(struct hypercall_postmsg_in, hc_data[0])); 251 if (xact == NULL) 252 return (NULL); 253 254 mh = vmbus_xact_priv(xact, sizeof(*mh)); 255 mh->mh_xact = xact; 256 257 vmbus_msghc_reset(mh, dsize); 258 return (mh); 259 } 260 261 void 262 vmbus_msghc_put(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 263 { 264 265 vmbus_xact_put(mh->mh_xact); 266 } 267 268 void * 269 vmbus_msghc_dataptr(struct vmbus_msghc *mh) 270 { 271 struct hypercall_postmsg_in *inprm; 272 273 inprm = vmbus_xact_req_data(mh->mh_xact); 274 return (inprm->hc_data); 275 } 276 277 int 278 vmbus_msghc_exec_noresult(struct vmbus_msghc *mh) 279 { 280 sbintime_t time = SBT_1MS; 281 struct hypercall_postmsg_in *inprm; 282 bus_addr_t inprm_paddr; 283 int i; 284 285 inprm = vmbus_xact_req_data(mh->mh_xact); 286 inprm_paddr = vmbus_xact_req_paddr(mh->mh_xact); 287 288 /* 289 * Save the input parameter so that we could restore the input 290 * parameter if the Hypercall failed. 291 * 292 * XXX 293 * Is this really necessary?! i.e. Will the Hypercall ever 294 * overwrite the input parameter? 295 */ 296 memcpy(&mh->mh_inprm_save, inprm, HYPERCALL_POSTMSGIN_SIZE); 297 298 /* 299 * In order to cope with transient failures, e.g. insufficient 300 * resources on host side, we retry the post message Hypercall 301 * several times. 20 retries seem sufficient. 302 */ 303 #define HC_RETRY_MAX 20 304 305 for (i = 0; i < HC_RETRY_MAX; ++i) { 306 uint64_t status; 307 308 status = hypercall_post_message(inprm_paddr); 309 if (status == HYPERCALL_STATUS_SUCCESS) 310 return 0; 311 312 pause_sbt("hcpmsg", time, 0, C_HARDCLOCK); 313 if (time < SBT_1S * 2) 314 time *= 2; 315 316 /* Restore input parameter and try again */ 317 memcpy(inprm, &mh->mh_inprm_save, HYPERCALL_POSTMSGIN_SIZE); 318 } 319 320 #undef HC_RETRY_MAX 321 322 return EIO; 323 } 324 325 int 326 vmbus_msghc_exec(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 327 { 328 int error; 329 330 vmbus_xact_activate(mh->mh_xact); 331 error = vmbus_msghc_exec_noresult(mh); 332 if (error) 333 vmbus_xact_deactivate(mh->mh_xact); 334 return error; 335 } 336 337 void 338 vmbus_msghc_exec_cancel(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 339 { 340 341 vmbus_xact_deactivate(mh->mh_xact); 342 } 343 344 const struct vmbus_message * 345 vmbus_msghc_wait_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 346 { 347 size_t resp_len; 348 349 return (vmbus_xact_wait(mh->mh_xact, &resp_len)); 350 } 351 352 const struct vmbus_message * 353 vmbus_msghc_poll_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 354 { 355 size_t resp_len; 356 357 return (vmbus_xact_poll(mh->mh_xact, &resp_len)); 358 } 359 360 void 361 vmbus_msghc_wakeup(struct vmbus_softc *sc, const struct vmbus_message *msg) 362 { 363 364 vmbus_xact_ctx_wakeup(sc->vmbus_xc, msg, sizeof(*msg)); 365 } 366 367 uint32_t 368 vmbus_gpadl_alloc(struct vmbus_softc *sc) 369 { 370 uint32_t gpadl; 371 372 again: 373 gpadl = atomic_fetchadd_int(&sc->vmbus_gpadl, 1); 374 if (gpadl == 0) 375 goto again; 376 return (gpadl); 377 } 378 379 /* Used for Hyper-V socket when guest client connects to host */ 380 int 381 vmbus_req_tl_connect(struct hyperv_guid *guest_srv_id, 382 struct hyperv_guid *host_srv_id) 383 { 384 struct vmbus_softc *sc = vmbus_get_softc(); 385 struct vmbus_chanmsg_tl_connect *req; 386 struct vmbus_msghc *mh; 387 int error; 388 389 if (!sc) 390 return ENXIO; 391 392 mh = vmbus_msghc_get(sc, sizeof(*req)); 393 if (mh == NULL) { 394 device_printf(sc->vmbus_dev, 395 "can not get msg hypercall for tl connect\n"); 396 return ENXIO; 397 } 398 399 req = vmbus_msghc_dataptr(mh); 400 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_TL_CONN; 401 req->guest_endpoint_id = *guest_srv_id; 402 req->host_service_id = *host_srv_id; 403 404 error = vmbus_msghc_exec_noresult(mh); 405 vmbus_msghc_put(sc, mh); 406 407 if (error) { 408 device_printf(sc->vmbus_dev, 409 "tl connect msg hypercall failed\n"); 410 } 411 412 return error; 413 } 414 415 static int 416 vmbus_connect(struct vmbus_softc *sc, uint32_t version) 417 { 418 struct vmbus_chanmsg_connect *req; 419 const struct vmbus_message *msg; 420 struct vmbus_msghc *mh; 421 int error, done = 0; 422 423 mh = vmbus_msghc_get(sc, sizeof(*req)); 424 if (mh == NULL) 425 return ENXIO; 426 427 req = vmbus_msghc_dataptr(mh); 428 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CONNECT; 429 req->chm_ver = version; 430 req->chm_evtflags = sc->vmbus_evtflags_dma.hv_paddr; 431 req->chm_mnf1 = sc->vmbus_mnf1_dma.hv_paddr; 432 req->chm_mnf2 = sc->vmbus_mnf2_dma.hv_paddr; 433 434 error = vmbus_msghc_exec(sc, mh); 435 if (error) { 436 vmbus_msghc_put(sc, mh); 437 return error; 438 } 439 440 msg = vmbus_msghc_wait_result(sc, mh); 441 done = ((const struct vmbus_chanmsg_connect_resp *) 442 msg->msg_data)->chm_done; 443 444 vmbus_msghc_put(sc, mh); 445 446 return (done ? 0 : EOPNOTSUPP); 447 } 448 449 static int 450 vmbus_init(struct vmbus_softc *sc) 451 { 452 int i; 453 454 for (i = 0; i < nitems(vmbus_version); ++i) { 455 int error; 456 457 error = vmbus_connect(sc, vmbus_version[i]); 458 if (!error) { 459 vmbus_current_version = vmbus_version[i]; 460 sc->vmbus_version = vmbus_version[i]; 461 device_printf(sc->vmbus_dev, "version %u.%u\n", 462 VMBUS_VERSION_MAJOR(sc->vmbus_version), 463 VMBUS_VERSION_MINOR(sc->vmbus_version)); 464 return 0; 465 } 466 } 467 return ENXIO; 468 } 469 470 static void 471 vmbus_disconnect(struct vmbus_softc *sc) 472 { 473 struct vmbus_chanmsg_disconnect *req; 474 struct vmbus_msghc *mh; 475 int error; 476 477 mh = vmbus_msghc_get(sc, sizeof(*req)); 478 if (mh == NULL) { 479 device_printf(sc->vmbus_dev, 480 "can not get msg hypercall for disconnect\n"); 481 return; 482 } 483 484 req = vmbus_msghc_dataptr(mh); 485 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_DISCONNECT; 486 487 error = vmbus_msghc_exec_noresult(mh); 488 vmbus_msghc_put(sc, mh); 489 490 if (error) { 491 device_printf(sc->vmbus_dev, 492 "disconnect msg hypercall failed\n"); 493 } 494 } 495 496 static int 497 vmbus_req_channels(struct vmbus_softc *sc) 498 { 499 struct vmbus_chanmsg_chrequest *req; 500 struct vmbus_msghc *mh; 501 int error; 502 503 mh = vmbus_msghc_get(sc, sizeof(*req)); 504 if (mh == NULL) 505 return ENXIO; 506 507 req = vmbus_msghc_dataptr(mh); 508 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHREQUEST; 509 510 error = vmbus_msghc_exec_noresult(mh); 511 vmbus_msghc_put(sc, mh); 512 513 return error; 514 } 515 516 static void 517 vmbus_scan_done_task(void *xsc, int pending __unused) 518 { 519 struct vmbus_softc *sc = xsc; 520 521 bus_topo_lock(); 522 sc->vmbus_scandone = true; 523 bus_topo_unlock(); 524 wakeup(&sc->vmbus_scandone); 525 } 526 527 static void 528 vmbus_scan_done(struct vmbus_softc *sc, 529 const struct vmbus_message *msg __unused) 530 { 531 532 taskqueue_enqueue(sc->vmbus_devtq, &sc->vmbus_scandone_task); 533 } 534 535 static int 536 vmbus_scan(struct vmbus_softc *sc) 537 { 538 int error; 539 540 /* 541 * Identify, probe and attach for non-channel devices. 542 */ 543 bus_generic_probe(sc->vmbus_dev); 544 bus_generic_attach(sc->vmbus_dev); 545 546 /* 547 * This taskqueue serializes vmbus devices' attach and detach 548 * for channel offer and rescind messages. 549 */ 550 sc->vmbus_devtq = taskqueue_create("vmbus dev", M_WAITOK, 551 taskqueue_thread_enqueue, &sc->vmbus_devtq); 552 taskqueue_start_threads(&sc->vmbus_devtq, 1, PI_NET, "vmbusdev"); 553 TASK_INIT(&sc->vmbus_scandone_task, 0, vmbus_scan_done_task, sc); 554 555 /* 556 * This taskqueue handles sub-channel detach, so that vmbus 557 * device's detach running in vmbus_devtq can drain its sub- 558 * channels. 559 */ 560 sc->vmbus_subchtq = taskqueue_create("vmbus subch", M_WAITOK, 561 taskqueue_thread_enqueue, &sc->vmbus_subchtq); 562 taskqueue_start_threads(&sc->vmbus_subchtq, 1, PI_NET, "vmbussch"); 563 564 /* 565 * Start vmbus scanning. 566 */ 567 error = vmbus_req_channels(sc); 568 if (error) { 569 device_printf(sc->vmbus_dev, "channel request failed: %d\n", 570 error); 571 return (error); 572 } 573 574 /* 575 * Wait for all vmbus devices from the initial channel offers to be 576 * attached. 577 */ 578 bus_topo_assert(); 579 while (!sc->vmbus_scandone) 580 mtx_sleep(&sc->vmbus_scandone, bus_topo_mtx(), 0, "vmbusdev", 0); 581 582 if (bootverbose) { 583 device_printf(sc->vmbus_dev, "device scan, probe and attach " 584 "done\n"); 585 } 586 return (0); 587 } 588 589 static void 590 vmbus_scan_teardown(struct vmbus_softc *sc) 591 { 592 593 bus_topo_assert(); 594 if (sc->vmbus_devtq != NULL) { 595 bus_topo_unlock(); 596 taskqueue_free(sc->vmbus_devtq); 597 bus_topo_lock(); 598 sc->vmbus_devtq = NULL; 599 } 600 if (sc->vmbus_subchtq != NULL) { 601 bus_topo_unlock(); 602 taskqueue_free(sc->vmbus_subchtq); 603 bus_topo_lock(); 604 sc->vmbus_subchtq = NULL; 605 } 606 } 607 608 static void 609 vmbus_chanmsg_handle(struct vmbus_softc *sc, const struct vmbus_message *msg) 610 { 611 vmbus_chanmsg_proc_t msg_proc; 612 uint32_t msg_type; 613 614 msg_type = ((const struct vmbus_chanmsg_hdr *)msg->msg_data)->chm_type; 615 if (msg_type >= VMBUS_CHANMSG_TYPE_MAX) { 616 device_printf(sc->vmbus_dev, "unknown message type 0x%x\n", 617 msg_type); 618 return; 619 } 620 621 msg_proc = vmbus_chanmsg_handlers[msg_type]; 622 if (msg_proc != NULL) 623 msg_proc(sc, msg); 624 625 /* Channel specific processing */ 626 vmbus_chan_msgproc(sc, msg); 627 } 628 629 static void 630 vmbus_msg_task(void *xsc, int pending __unused) 631 { 632 struct vmbus_softc *sc = xsc; 633 volatile struct vmbus_message *msg; 634 635 msg = VMBUS_PCPU_GET(sc, message, curcpu) + VMBUS_SINT_MESSAGE; 636 for (;;) { 637 if (msg->msg_type == HYPERV_MSGTYPE_NONE) { 638 /* No message */ 639 break; 640 } else if (msg->msg_type == HYPERV_MSGTYPE_CHANNEL) { 641 /* Channel message */ 642 vmbus_chanmsg_handle(sc, 643 __DEVOLATILE(const struct vmbus_message *, msg)); 644 } 645 646 msg->msg_type = HYPERV_MSGTYPE_NONE; 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 static __inline int 669 vmbus_handle_intr1(struct vmbus_softc *sc, struct trapframe *frame, int cpu) 670 { 671 volatile struct vmbus_message *msg; 672 struct vmbus_message *msg_base; 673 674 msg_base = VMBUS_PCPU_GET(sc, message, cpu); 675 676 /* 677 * Check event timer. 678 * 679 * TODO: move this to independent IDT vector. 680 */ 681 vmbus_handle_timer_intr1(msg_base, frame); 682 /* 683 * Check events. Hot path for network and storage I/O data; high rate. 684 * 685 * NOTE: 686 * As recommended by the Windows guest fellows, we check events before 687 * checking messages. 688 */ 689 sc->vmbus_event_proc(sc, cpu); 690 691 /* 692 * Check messages. Mainly management stuffs; ultra low rate. 693 */ 694 msg = msg_base + VMBUS_SINT_MESSAGE; 695 if (__predict_false(msg->msg_type != HYPERV_MSGTYPE_NONE)) { 696 taskqueue_enqueue(VMBUS_PCPU_GET(sc, message_tq, cpu), 697 VMBUS_PCPU_PTR(sc, message_task, cpu)); 698 } 699 700 return (FILTER_HANDLED); 701 } 702 703 void 704 vmbus_handle_intr(struct trapframe *trap_frame) 705 { 706 struct vmbus_softc *sc = vmbus_get_softc(); 707 int cpu = curcpu; 708 709 /* 710 * Disable preemption. 711 */ 712 critical_enter(); 713 714 /* 715 * Do a little interrupt counting. This used x86 specific 716 * intrcnt_add function 717 */ 718 #if !defined(__aarch64__) 719 (*VMBUS_PCPU_GET(sc, intr_cnt, cpu))++; 720 #endif /* not for aarch64 */ 721 vmbus_handle_intr1(sc, trap_frame, cpu); 722 723 /* 724 * Enable preemption. 725 */ 726 critical_exit(); 727 } 728 729 static void 730 vmbus_synic_setup(void *xsc) 731 { 732 struct vmbus_softc *sc = xsc; 733 int cpu = curcpu; 734 uint64_t val, orig; 735 uint32_t sint; 736 737 if (hyperv_features & CPUID_HV_MSR_VP_INDEX) { 738 /* Save virtual processor id. */ 739 VMBUS_PCPU_GET(sc, vcpuid, cpu) = RDMSR(MSR_HV_VP_INDEX); 740 } else { 741 /* Set virtual processor id to 0 for compatibility. */ 742 VMBUS_PCPU_GET(sc, vcpuid, cpu) = 0; 743 } 744 745 /* 746 * Setup the SynIC message. 747 */ 748 orig = RDMSR(MSR_HV_SIMP); 749 val = MSR_HV_SIMP_ENABLE | (orig & MSR_HV_SIMP_RSVD_MASK) | 750 ((VMBUS_PCPU_GET(sc, message_dma.hv_paddr, cpu) >> PAGE_SHIFT) 751 << MSR_HV_SIMP_PGSHIFT); 752 WRMSR(MSR_HV_SIMP, val); 753 /* 754 * Setup the SynIC event flags. 755 */ 756 orig = RDMSR(MSR_HV_SIEFP); 757 val = MSR_HV_SIEFP_ENABLE | (orig & MSR_HV_SIEFP_RSVD_MASK) | 758 ((VMBUS_PCPU_GET(sc, event_flags_dma.hv_paddr, cpu) >> PAGE_SHIFT) 759 << MSR_HV_SIEFP_PGSHIFT); 760 WRMSR(MSR_HV_SIEFP, val); 761 762 /* 763 * Configure and unmask SINT for message and event flags. 764 */ 765 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 766 orig = RDMSR(sint); 767 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 768 (orig & MSR_HV_SINT_RSVD_MASK); 769 WRMSR(sint, val); 770 771 /* 772 * Configure and unmask SINT for timer. 773 */ 774 vmbus_synic_setup1(sc); 775 /* 776 * All done; enable SynIC. 777 */ 778 orig = RDMSR(MSR_HV_SCONTROL); 779 val = MSR_HV_SCTRL_ENABLE | (orig & MSR_HV_SCTRL_RSVD_MASK); 780 WRMSR(MSR_HV_SCONTROL, val); 781 } 782 783 static void 784 vmbus_synic_teardown(void *arg) 785 { 786 uint64_t orig; 787 uint32_t sint; 788 789 /* 790 * Disable SynIC. 791 */ 792 orig = RDMSR(MSR_HV_SCONTROL); 793 WRMSR(MSR_HV_SCONTROL, (orig & MSR_HV_SCTRL_RSVD_MASK)); 794 795 /* 796 * Mask message and event flags SINT. 797 */ 798 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 799 orig = RDMSR(sint); 800 WRMSR(sint, orig | MSR_HV_SINT_MASKED); 801 802 /* 803 * Mask timer SINT. 804 */ 805 vmbus_synic_teardown1(); 806 /* 807 * Teardown SynIC message. 808 */ 809 orig = RDMSR(MSR_HV_SIMP); 810 WRMSR(MSR_HV_SIMP, (orig & MSR_HV_SIMP_RSVD_MASK)); 811 812 /* 813 * Teardown SynIC event flags. 814 */ 815 orig = RDMSR(MSR_HV_SIEFP); 816 WRMSR(MSR_HV_SIEFP, (orig & MSR_HV_SIEFP_RSVD_MASK)); 817 } 818 819 static int 820 vmbus_dma_alloc(struct vmbus_softc *sc) 821 { 822 bus_dma_tag_t parent_dtag; 823 uint8_t *evtflags; 824 int cpu; 825 826 parent_dtag = bus_get_dma_tag(sc->vmbus_dev); 827 CPU_FOREACH(cpu) { 828 void *ptr; 829 830 /* 831 * Per-cpu messages and event flags. 832 */ 833 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 834 PAGE_SIZE, VMBUS_PCPU_PTR(sc, message_dma, cpu), 835 BUS_DMA_WAITOK | BUS_DMA_ZERO); 836 if (ptr == NULL) 837 return ENOMEM; 838 VMBUS_PCPU_GET(sc, message, cpu) = ptr; 839 840 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 841 PAGE_SIZE, VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 842 BUS_DMA_WAITOK | BUS_DMA_ZERO); 843 if (ptr == NULL) 844 return ENOMEM; 845 VMBUS_PCPU_GET(sc, event_flags, cpu) = ptr; 846 } 847 848 evtflags = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 849 PAGE_SIZE, &sc->vmbus_evtflags_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 850 if (evtflags == NULL) 851 return ENOMEM; 852 sc->vmbus_rx_evtflags = (u_long *)evtflags; 853 sc->vmbus_tx_evtflags = (u_long *)(evtflags + (PAGE_SIZE / 2)); 854 sc->vmbus_evtflags = evtflags; 855 856 sc->vmbus_mnf1 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 857 PAGE_SIZE, &sc->vmbus_mnf1_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 858 if (sc->vmbus_mnf1 == NULL) 859 return ENOMEM; 860 861 sc->vmbus_mnf2 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 862 sizeof(struct vmbus_mnf), &sc->vmbus_mnf2_dma, 863 BUS_DMA_WAITOK | BUS_DMA_ZERO); 864 if (sc->vmbus_mnf2 == NULL) 865 return ENOMEM; 866 867 return 0; 868 } 869 870 static void 871 vmbus_dma_free(struct vmbus_softc *sc) 872 { 873 int cpu; 874 875 if (sc->vmbus_evtflags != NULL) { 876 hyperv_dmamem_free(&sc->vmbus_evtflags_dma, sc->vmbus_evtflags); 877 sc->vmbus_evtflags = NULL; 878 sc->vmbus_rx_evtflags = NULL; 879 sc->vmbus_tx_evtflags = NULL; 880 } 881 if (sc->vmbus_mnf1 != NULL) { 882 hyperv_dmamem_free(&sc->vmbus_mnf1_dma, sc->vmbus_mnf1); 883 sc->vmbus_mnf1 = NULL; 884 } 885 if (sc->vmbus_mnf2 != NULL) { 886 hyperv_dmamem_free(&sc->vmbus_mnf2_dma, sc->vmbus_mnf2); 887 sc->vmbus_mnf2 = NULL; 888 } 889 890 CPU_FOREACH(cpu) { 891 if (VMBUS_PCPU_GET(sc, message, cpu) != NULL) { 892 hyperv_dmamem_free( 893 VMBUS_PCPU_PTR(sc, message_dma, cpu), 894 VMBUS_PCPU_GET(sc, message, cpu)); 895 VMBUS_PCPU_GET(sc, message, cpu) = NULL; 896 } 897 if (VMBUS_PCPU_GET(sc, event_flags, cpu) != NULL) { 898 hyperv_dmamem_free( 899 VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 900 VMBUS_PCPU_GET(sc, event_flags, cpu)); 901 VMBUS_PCPU_GET(sc, event_flags, cpu) = NULL; 902 } 903 } 904 } 905 906 static int 907 vmbus_intr_setup(struct vmbus_softc *sc) 908 { 909 int cpu; 910 911 CPU_FOREACH(cpu) { 912 char buf[MAXCOMLEN + 1]; 913 cpuset_t cpu_mask; 914 915 /* Allocate an interrupt counter for Hyper-V interrupt */ 916 snprintf(buf, sizeof(buf), "cpu%d:hyperv", cpu); 917 #if !defined(__aarch64__) 918 intrcnt_add(buf, VMBUS_PCPU_PTR(sc, intr_cnt, cpu)); 919 #endif /* not for aarch64 */ 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 if (vmbus_pin_evttask) { 928 CPU_SETOF(cpu, &cpu_mask); 929 taskqueue_start_threads_cpuset( 930 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 931 &cpu_mask, "hvevent%d", cpu); 932 } else { 933 taskqueue_start_threads( 934 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 935 "hvevent%d", cpu); 936 } 937 938 /* 939 * Setup tasks and taskqueues to handle messages. 940 */ 941 VMBUS_PCPU_GET(sc, message_tq, cpu) = taskqueue_create_fast( 942 "hyperv msg", M_WAITOK, taskqueue_thread_enqueue, 943 VMBUS_PCPU_PTR(sc, message_tq, cpu)); 944 CPU_SETOF(cpu, &cpu_mask); 945 taskqueue_start_threads_cpuset( 946 VMBUS_PCPU_PTR(sc, message_tq, cpu), 1, PI_NET, &cpu_mask, 947 "hvmsg%d", cpu); 948 TASK_INIT(VMBUS_PCPU_PTR(sc, message_task, cpu), 0, 949 vmbus_msg_task, sc); 950 } 951 return (vmbus_setup_intr1(sc)); 952 } 953 static void 954 vmbus_intr_teardown(struct vmbus_softc *sc) 955 { 956 vmbus_intr_teardown1(sc); 957 } 958 959 static int 960 vmbus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 961 { 962 return (ENOENT); 963 } 964 965 static int 966 vmbus_child_pnpinfo(device_t dev, device_t child, struct sbuf *sb) 967 { 968 const struct vmbus_channel *chan; 969 char guidbuf[HYPERV_GUID_STRLEN]; 970 971 chan = vmbus_get_channel(child); 972 if (chan == NULL) { 973 /* Event timer device, which does not belong to a channel */ 974 return (0); 975 } 976 977 hyperv_guid2str(&chan->ch_guid_type, guidbuf, sizeof(guidbuf)); 978 sbuf_printf(sb, "classid=%s", guidbuf); 979 980 hyperv_guid2str(&chan->ch_guid_inst, guidbuf, sizeof(guidbuf)); 981 sbuf_printf(sb, " deviceid=%s", guidbuf); 982 983 return (0); 984 } 985 986 int 987 vmbus_add_child(struct vmbus_channel *chan) 988 { 989 struct vmbus_softc *sc = chan->ch_vmbus; 990 device_t parent = sc->vmbus_dev; 991 992 bus_topo_lock(); 993 chan->ch_dev = device_add_child(parent, NULL, -1); 994 if (chan->ch_dev == NULL) { 995 bus_topo_unlock(); 996 device_printf(parent, "device_add_child for chan%u failed\n", 997 chan->ch_id); 998 return (ENXIO); 999 } 1000 device_set_ivars(chan->ch_dev, chan); 1001 device_probe_and_attach(chan->ch_dev); 1002 bus_topo_unlock(); 1003 1004 return (0); 1005 } 1006 1007 int 1008 vmbus_delete_child(struct vmbus_channel *chan) 1009 { 1010 int error = 0; 1011 1012 bus_topo_lock(); 1013 if (chan->ch_dev != NULL) { 1014 error = device_delete_child(chan->ch_vmbus->vmbus_dev, 1015 chan->ch_dev); 1016 chan->ch_dev = NULL; 1017 } 1018 bus_topo_unlock(); 1019 return (error); 1020 } 1021 1022 static int 1023 vmbus_sysctl_version(SYSCTL_HANDLER_ARGS) 1024 { 1025 struct vmbus_softc *sc = arg1; 1026 char verstr[16]; 1027 1028 snprintf(verstr, sizeof(verstr), "%u.%u", 1029 VMBUS_VERSION_MAJOR(sc->vmbus_version), 1030 VMBUS_VERSION_MINOR(sc->vmbus_version)); 1031 return sysctl_handle_string(oidp, verstr, sizeof(verstr), req); 1032 } 1033 1034 /* 1035 * We need the function to make sure the MMIO resource is allocated from the 1036 * ranges found in _CRS. 1037 * 1038 * For the release function, we can use bus_generic_release_resource(). 1039 */ 1040 static struct resource * 1041 vmbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 1042 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1043 { 1044 device_t parent = device_get_parent(dev); 1045 struct resource *res; 1046 1047 #ifdef NEW_PCIB 1048 if (type == SYS_RES_MEMORY) { 1049 struct vmbus_softc *sc = device_get_softc(dev); 1050 1051 res = pcib_host_res_alloc(&sc->vmbus_mmio_res, child, type, 1052 rid, start, end, count, flags); 1053 } else 1054 #endif 1055 { 1056 res = BUS_ALLOC_RESOURCE(parent, child, type, rid, start, 1057 end, count, flags); 1058 } 1059 1060 return (res); 1061 } 1062 1063 static int 1064 vmbus_alloc_msi(device_t bus, device_t dev, int count, int maxcount, int *irqs) 1065 { 1066 1067 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 1068 irqs)); 1069 } 1070 1071 static int 1072 vmbus_release_msi(device_t bus, device_t dev, int count, int *irqs) 1073 { 1074 1075 return (PCIB_RELEASE_MSI(device_get_parent(bus), dev, count, irqs)); 1076 } 1077 1078 static int 1079 vmbus_alloc_msix(device_t bus, device_t dev, int *irq) 1080 { 1081 1082 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 1083 } 1084 1085 static int 1086 vmbus_release_msix(device_t bus, device_t dev, int irq) 1087 { 1088 1089 return (PCIB_RELEASE_MSIX(device_get_parent(bus), dev, irq)); 1090 } 1091 1092 static int 1093 vmbus_map_msi(device_t bus, device_t dev, int irq, uint64_t *addr, 1094 uint32_t *data) 1095 { 1096 1097 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 1098 } 1099 1100 static uint32_t 1101 vmbus_get_version_method(device_t bus, device_t dev) 1102 { 1103 struct vmbus_softc *sc = device_get_softc(bus); 1104 1105 return sc->vmbus_version; 1106 } 1107 1108 static int 1109 vmbus_probe_guid_method(device_t bus, device_t dev, 1110 const struct hyperv_guid *guid) 1111 { 1112 const struct vmbus_channel *chan = vmbus_get_channel(dev); 1113 1114 if (memcmp(&chan->ch_guid_type, guid, sizeof(struct hyperv_guid)) == 0) 1115 return 0; 1116 return ENXIO; 1117 } 1118 1119 static uint32_t 1120 vmbus_get_vcpu_id_method(device_t bus, device_t dev, int cpu) 1121 { 1122 const struct vmbus_softc *sc = device_get_softc(bus); 1123 1124 return (VMBUS_PCPU_GET(sc, vcpuid, cpu)); 1125 } 1126 1127 static struct taskqueue * 1128 vmbus_get_eventtq_method(device_t bus, device_t dev __unused, int cpu) 1129 { 1130 const struct vmbus_softc *sc = device_get_softc(bus); 1131 1132 KASSERT(cpu >= 0 && cpu < mp_ncpus, ("invalid cpu%d", cpu)); 1133 return (VMBUS_PCPU_GET(sc, event_tq, cpu)); 1134 } 1135 1136 #ifdef NEW_PCIB 1137 #define VTPM_BASE_ADDR 0xfed40000 1138 #define FOUR_GB (1ULL << 32) 1139 1140 enum parse_pass { parse_64, parse_32 }; 1141 1142 struct parse_context { 1143 device_t vmbus_dev; 1144 enum parse_pass pass; 1145 }; 1146 1147 static ACPI_STATUS 1148 parse_crs(ACPI_RESOURCE *res, void *ctx) 1149 { 1150 const struct parse_context *pc = ctx; 1151 device_t vmbus_dev = pc->vmbus_dev; 1152 1153 struct vmbus_softc *sc = device_get_softc(vmbus_dev); 1154 UINT64 start, end; 1155 1156 switch (res->Type) { 1157 case ACPI_RESOURCE_TYPE_ADDRESS32: 1158 start = res->Data.Address32.Address.Minimum; 1159 end = res->Data.Address32.Address.Maximum; 1160 break; 1161 1162 case ACPI_RESOURCE_TYPE_ADDRESS64: 1163 start = res->Data.Address64.Address.Minimum; 1164 end = res->Data.Address64.Address.Maximum; 1165 break; 1166 1167 default: 1168 /* Unused types. */ 1169 return (AE_OK); 1170 } 1171 1172 /* 1173 * We don't use <1MB addresses. 1174 */ 1175 if (end < 0x100000) 1176 return (AE_OK); 1177 1178 /* Don't conflict with vTPM. */ 1179 if (end >= VTPM_BASE_ADDR && start < VTPM_BASE_ADDR) 1180 end = VTPM_BASE_ADDR - 1; 1181 1182 if ((pc->pass == parse_32 && start < FOUR_GB) || 1183 (pc->pass == parse_64 && start >= FOUR_GB)) 1184 pcib_host_res_decodes(&sc->vmbus_mmio_res, SYS_RES_MEMORY, 1185 start, end, 0); 1186 1187 return (AE_OK); 1188 } 1189 1190 static void 1191 vmbus_get_crs(device_t dev, device_t vmbus_dev, enum parse_pass pass) 1192 { 1193 struct parse_context pc; 1194 ACPI_STATUS status; 1195 1196 if (bootverbose) 1197 device_printf(dev, "walking _CRS, pass=%d\n", pass); 1198 1199 pc.vmbus_dev = vmbus_dev; 1200 pc.pass = pass; 1201 status = AcpiWalkResources(acpi_get_handle(dev), "_CRS", 1202 parse_crs, &pc); 1203 1204 if (bootverbose && ACPI_FAILURE(status)) 1205 device_printf(dev, "_CRS: not found, pass=%d\n", pass); 1206 } 1207 1208 static void 1209 vmbus_get_mmio_res_pass(device_t dev, enum parse_pass pass) 1210 { 1211 device_t acpi0, parent; 1212 1213 parent = device_get_parent(dev); 1214 1215 acpi0 = device_get_parent(parent); 1216 if (strcmp("acpi0", device_get_nameunit(acpi0)) == 0) { 1217 device_t *children; 1218 int count; 1219 1220 /* 1221 * Try to locate VMBUS resources and find _CRS on them. 1222 */ 1223 if (device_get_children(acpi0, &children, &count) == 0) { 1224 int i; 1225 1226 for (i = 0; i < count; ++i) { 1227 if (!device_is_attached(children[i])) 1228 continue; 1229 1230 if (strcmp("vmbus_res", 1231 device_get_name(children[i])) == 0) 1232 vmbus_get_crs(children[i], dev, pass); 1233 } 1234 free(children, M_TEMP); 1235 } 1236 1237 /* 1238 * Try to find _CRS on acpi. 1239 */ 1240 vmbus_get_crs(acpi0, dev, pass); 1241 } else { 1242 device_printf(dev, "not grandchild of acpi\n"); 1243 } 1244 1245 /* 1246 * Try to find _CRS on parent. 1247 */ 1248 vmbus_get_crs(parent, dev, pass); 1249 } 1250 1251 static void 1252 vmbus_get_mmio_res(device_t dev) 1253 { 1254 struct vmbus_softc *sc = device_get_softc(dev); 1255 /* 1256 * We walk the resources twice to make sure that: in the resource 1257 * list, the 32-bit resources appear behind the 64-bit resources. 1258 * NB: resource_list_add() uses INSERT_TAIL. This way, when we 1259 * iterate through the list to find a range for a 64-bit BAR in 1260 * vmbus_alloc_resource(), we can make sure we try to use >4GB 1261 * ranges first. 1262 */ 1263 pcib_host_res_init(dev, &sc->vmbus_mmio_res); 1264 1265 vmbus_get_mmio_res_pass(dev, parse_64); 1266 vmbus_get_mmio_res_pass(dev, parse_32); 1267 } 1268 1269 /* 1270 * On Gen2 VMs, Hyper-V provides mmio space for framebuffer. 1271 * This mmio address range is not useable for other PCI devices. 1272 * Currently only efifb and vbefb drivers are using this range without 1273 * reserving it from system. 1274 * Therefore, vmbus driver reserves it before any other PCI device 1275 * drivers start to request mmio addresses. 1276 */ 1277 static struct resource *hv_fb_res; 1278 1279 static void 1280 vmbus_fb_mmio_res(device_t dev) 1281 { 1282 struct efi_fb *efifb; 1283 #if !defined(__aarch64__) 1284 struct vbe_fb *vbefb; 1285 #endif /* aarch64 */ 1286 rman_res_t fb_start, fb_end, fb_count; 1287 int fb_height, fb_width; 1288 caddr_t kmdp; 1289 1290 struct vmbus_softc *sc = device_get_softc(dev); 1291 int rid = 0; 1292 1293 kmdp = preload_search_by_type("elf kernel"); 1294 if (kmdp == NULL) 1295 kmdp = preload_search_by_type("elf64 kernel"); 1296 efifb = (struct efi_fb *)preload_search_info(kmdp, 1297 MODINFO_METADATA | MODINFOMD_EFI_FB); 1298 #if !defined(__aarch64__) 1299 vbefb = (struct vbe_fb *)preload_search_info(kmdp, 1300 MODINFO_METADATA | MODINFOMD_VBE_FB); 1301 #endif /* aarch64 */ 1302 if (efifb != NULL) { 1303 fb_start = efifb->fb_addr; 1304 fb_end = efifb->fb_addr + efifb->fb_size; 1305 fb_count = efifb->fb_size; 1306 fb_height = efifb->fb_height; 1307 fb_width = efifb->fb_width; 1308 } 1309 #if !defined(__aarch64__) 1310 else if (vbefb != NULL) { 1311 fb_start = vbefb->fb_addr; 1312 fb_end = vbefb->fb_addr + vbefb->fb_size; 1313 fb_count = vbefb->fb_size; 1314 fb_height = vbefb->fb_height; 1315 fb_width = vbefb->fb_width; 1316 } 1317 #endif /* aarch64 */ 1318 else { 1319 if (bootverbose) 1320 device_printf(dev, 1321 "no preloaded kernel fb information\n"); 1322 /* We are on Gen1 VM, just return. */ 1323 return; 1324 } 1325 1326 if (bootverbose) 1327 device_printf(dev, 1328 "fb: fb_addr: %#jx, size: %#jx, " 1329 "actual size needed: 0x%x\n", 1330 fb_start, fb_count, fb_height * fb_width); 1331 1332 hv_fb_res = pcib_host_res_alloc(&sc->vmbus_mmio_res, dev, 1333 SYS_RES_MEMORY, &rid, fb_start, fb_end, fb_count, 1334 RF_ACTIVE | rman_make_alignment_flags(PAGE_SIZE)); 1335 1336 if (hv_fb_res && bootverbose) 1337 device_printf(dev, 1338 "successfully reserved memory for framebuffer " 1339 "starting at %#jx, size %#jx\n", 1340 fb_start, fb_count); 1341 } 1342 1343 static void 1344 vmbus_free_mmio_res(device_t dev) 1345 { 1346 struct vmbus_softc *sc = device_get_softc(dev); 1347 1348 pcib_host_res_free(dev, &sc->vmbus_mmio_res); 1349 1350 if (hv_fb_res) 1351 hv_fb_res = NULL; 1352 } 1353 #endif /* NEW_PCIB */ 1354 1355 static void 1356 vmbus_identify(driver_t *driver, device_t parent) 1357 { 1358 1359 if (device_get_unit(parent) != 0 || vm_guest != VM_GUEST_HV || 1360 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1361 return; 1362 device_add_child(parent, "vmbus", -1); 1363 } 1364 1365 static int 1366 vmbus_probe(device_t dev) 1367 { 1368 1369 if (device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV || 1370 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1371 return (ENXIO); 1372 1373 device_set_desc(dev, "Hyper-V Vmbus"); 1374 return (BUS_PROBE_DEFAULT); 1375 } 1376 1377 /** 1378 * @brief Main vmbus driver initialization routine. 1379 * 1380 * Here, we 1381 * - initialize the vmbus driver context 1382 * - setup various driver entry points 1383 * - invoke the vmbus hv main init routine 1384 * - get the irq resource 1385 * - invoke the vmbus to add the vmbus root device 1386 * - setup the vmbus root device 1387 * - retrieve the channel offers 1388 */ 1389 static int 1390 vmbus_doattach(struct vmbus_softc *sc) 1391 { 1392 struct sysctl_oid_list *child; 1393 struct sysctl_ctx_list *ctx; 1394 int ret; 1395 1396 if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED) 1397 return (0); 1398 1399 #ifdef NEW_PCIB 1400 vmbus_get_mmio_res(sc->vmbus_dev); 1401 vmbus_fb_mmio_res(sc->vmbus_dev); 1402 #endif 1403 1404 sc->vmbus_flags |= VMBUS_FLAG_ATTACHED; 1405 1406 sc->vmbus_gpadl = VMBUS_GPADL_START; 1407 mtx_init(&sc->vmbus_prichan_lock, "vmbus prichan", NULL, MTX_DEF); 1408 TAILQ_INIT(&sc->vmbus_prichans); 1409 mtx_init(&sc->vmbus_chan_lock, "vmbus channel", NULL, MTX_DEF); 1410 TAILQ_INIT(&sc->vmbus_chans); 1411 sc->vmbus_chmap = malloc( 1412 sizeof(struct vmbus_channel *) * VMBUS_CHAN_MAX, M_DEVBUF, 1413 M_WAITOK | M_ZERO); 1414 1415 /* 1416 * Create context for "post message" Hypercalls 1417 */ 1418 sc->vmbus_xc = vmbus_xact_ctx_create(bus_get_dma_tag(sc->vmbus_dev), 1419 HYPERCALL_POSTMSGIN_SIZE, VMBUS_MSG_SIZE, 1420 sizeof(struct vmbus_msghc)); 1421 if (sc->vmbus_xc == NULL) { 1422 ret = ENXIO; 1423 goto cleanup; 1424 } 1425 1426 /* 1427 * Allocate DMA stuffs. 1428 */ 1429 ret = vmbus_dma_alloc(sc); 1430 if (ret != 0) 1431 goto cleanup; 1432 1433 /* 1434 * Setup interrupt. 1435 */ 1436 ret = vmbus_intr_setup(sc); 1437 if (ret != 0) 1438 goto cleanup; 1439 1440 /* 1441 * Setup SynIC. 1442 */ 1443 if (bootverbose) 1444 device_printf(sc->vmbus_dev, "smp_started = %d\n", smp_started); 1445 smp_rendezvous(NULL, vmbus_synic_setup, NULL, sc); 1446 sc->vmbus_flags |= VMBUS_FLAG_SYNIC; 1447 1448 /* 1449 * Initialize vmbus, e.g. connect to Hypervisor. 1450 */ 1451 ret = vmbus_init(sc); 1452 if (ret != 0) 1453 goto cleanup; 1454 1455 if (sc->vmbus_version == VMBUS_VERSION_WS2008 || 1456 sc->vmbus_version == VMBUS_VERSION_WIN7) 1457 sc->vmbus_event_proc = vmbus_event_proc_compat; 1458 else 1459 sc->vmbus_event_proc = vmbus_event_proc; 1460 1461 ret = vmbus_scan(sc); 1462 if (ret != 0) 1463 goto cleanup; 1464 1465 ctx = device_get_sysctl_ctx(sc->vmbus_dev); 1466 child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->vmbus_dev)); 1467 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "version", 1468 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, 1469 vmbus_sysctl_version, "A", "vmbus version"); 1470 1471 return (ret); 1472 1473 cleanup: 1474 vmbus_scan_teardown(sc); 1475 vmbus_intr_teardown(sc); 1476 vmbus_dma_free(sc); 1477 if (sc->vmbus_xc != NULL) { 1478 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1479 sc->vmbus_xc = NULL; 1480 } 1481 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1482 mtx_destroy(&sc->vmbus_prichan_lock); 1483 mtx_destroy(&sc->vmbus_chan_lock); 1484 1485 return (ret); 1486 } 1487 1488 static void 1489 vmbus_event_proc_dummy(struct vmbus_softc *sc __unused, int cpu __unused) 1490 { 1491 } 1492 1493 #if defined(EARLY_AP_STARTUP) || defined(__aarch64__) 1494 1495 static void 1496 vmbus_intrhook(void *xsc) 1497 { 1498 struct vmbus_softc *sc = xsc; 1499 1500 if (bootverbose) 1501 device_printf(sc->vmbus_dev, "intrhook\n"); 1502 vmbus_doattach(sc); 1503 config_intrhook_disestablish(&sc->vmbus_intrhook); 1504 } 1505 1506 #endif /* EARLY_AP_STARTUP aarch64 */ 1507 1508 static int 1509 vmbus_attach(device_t dev) 1510 { 1511 vmbus_sc = device_get_softc(dev); 1512 vmbus_sc->vmbus_dev = dev; 1513 vmbus_sc->vmbus_idtvec = -1; 1514 1515 /* 1516 * Event processing logic will be configured: 1517 * - After the vmbus protocol version negotiation. 1518 * - Before we request channel offers. 1519 */ 1520 vmbus_sc->vmbus_event_proc = vmbus_event_proc_dummy; 1521 1522 #if defined(EARLY_AP_STARTUP) || defined(__aarch64__) 1523 /* 1524 * Defer the real attach until the pause(9) works as expected. 1525 */ 1526 vmbus_sc->vmbus_intrhook.ich_func = vmbus_intrhook; 1527 vmbus_sc->vmbus_intrhook.ich_arg = vmbus_sc; 1528 config_intrhook_establish(&vmbus_sc->vmbus_intrhook); 1529 #else /* !EARLY_AP_STARTUP */ 1530 /* 1531 * If the system has already booted and thread 1532 * scheduling is possible indicated by the global 1533 * cold set to zero, we just call the driver 1534 * initialization directly. 1535 */ 1536 if (!cold) 1537 vmbus_doattach(vmbus_sc); 1538 #endif /* EARLY_AP_STARTUP and aarch64 */ 1539 1540 return (0); 1541 } 1542 1543 static int 1544 vmbus_detach(device_t dev) 1545 { 1546 struct vmbus_softc *sc = device_get_softc(dev); 1547 1548 bus_generic_detach(dev); 1549 vmbus_chan_destroy_all(sc); 1550 1551 vmbus_scan_teardown(sc); 1552 1553 vmbus_disconnect(sc); 1554 1555 if (sc->vmbus_flags & VMBUS_FLAG_SYNIC) { 1556 sc->vmbus_flags &= ~VMBUS_FLAG_SYNIC; 1557 smp_rendezvous(NULL, vmbus_synic_teardown, NULL, NULL); 1558 } 1559 1560 vmbus_intr_teardown(sc); 1561 vmbus_dma_free(sc); 1562 1563 if (sc->vmbus_xc != NULL) { 1564 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1565 sc->vmbus_xc = NULL; 1566 } 1567 1568 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1569 mtx_destroy(&sc->vmbus_prichan_lock); 1570 mtx_destroy(&sc->vmbus_chan_lock); 1571 1572 #ifdef NEW_PCIB 1573 vmbus_free_mmio_res(dev); 1574 #endif 1575 1576 #if defined(__aarch64__) 1577 bus_release_resource(device_get_parent(dev), SYS_RES_IRQ, sc->vector, 1578 sc->ires); 1579 #endif 1580 return (0); 1581 } 1582 1583 #if !defined(EARLY_AP_STARTUP) && !defined(__aarch64__) 1584 1585 static void 1586 vmbus_sysinit(void *arg __unused) 1587 { 1588 struct vmbus_softc *sc = vmbus_get_softc(); 1589 1590 if (vm_guest != VM_GUEST_HV || sc == NULL) 1591 return; 1592 1593 /* 1594 * If the system has already booted and thread 1595 * scheduling is possible, as indicated by the 1596 * global cold set to zero, we just call the driver 1597 * initialization directly. 1598 */ 1599 if (!cold) 1600 vmbus_doattach(sc); 1601 } 1602 /* 1603 * NOTE: 1604 * We have to start as the last step of SI_SUB_SMP, i.e. after SMP is 1605 * initialized. 1606 */ 1607 SYSINIT(vmbus_initialize, SI_SUB_SMP, SI_ORDER_ANY, vmbus_sysinit, NULL); 1608 #endif /* !EARLY_AP_STARTUP */
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