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: stable/11/sys/dev/hyperv/vmbus/vmbus.c 329462 2018-02-17 18:00:01Z kib $"); 34 35#include <sys/param.h> 36#include <sys/bus.h> 37#include <sys/kernel.h> 38#include <sys/lock.h> 39#include <sys/malloc.h> 40#include <sys/module.h> 41#include <sys/mutex.h> 42#include <sys/smp.h> 43#include <sys/sysctl.h> 44#include <sys/systm.h> 45#include <sys/taskqueue.h> 46 47#include <machine/bus.h> 48#include <machine/intr_machdep.h> 49#include <machine/md_var.h> 50#include <machine/resource.h> 51#include <x86/include/apicvar.h> 52 53#include <contrib/dev/acpica/include/acpi.h> 54#include <dev/acpica/acpivar.h> 55 56#include <dev/hyperv/include/hyperv.h> 57#include <dev/hyperv/include/vmbus_xact.h> 58#include <dev/hyperv/vmbus/hyperv_reg.h> 59#include <dev/hyperv/vmbus/hyperv_var.h> 60#include <dev/hyperv/vmbus/vmbus_reg.h> 61#include <dev/hyperv/vmbus/vmbus_var.h> 62#include <dev/hyperv/vmbus/vmbus_chanvar.h> 63 64#include "acpi_if.h" 65#include "pcib_if.h" 66#include "vmbus_if.h" 67 68#define VMBUS_GPADL_START 0xe1e10 69 70struct vmbus_msghc { 71 struct vmbus_xact *mh_xact; 72 struct hypercall_postmsg_in mh_inprm_save; 73}; 74 75static void vmbus_identify(driver_t *, device_t); 76static int vmbus_probe(device_t); 77static int vmbus_attach(device_t); 78static int vmbus_detach(device_t); 79static int vmbus_read_ivar(device_t, device_t, int, 80 uintptr_t *); 81static int vmbus_child_pnpinfo_str(device_t, device_t, 82 char *, size_t); 83static struct resource *vmbus_alloc_resource(device_t dev, 84 device_t child, int type, int *rid, 85 rman_res_t start, rman_res_t end, 86 rman_res_t count, u_int flags); 87static int vmbus_alloc_msi(device_t bus, device_t dev, 88 int count, int maxcount, int *irqs); 89static int vmbus_release_msi(device_t bus, device_t dev, 90 int count, int *irqs); 91static int vmbus_alloc_msix(device_t bus, device_t dev, 92 int *irq); 93static int vmbus_release_msix(device_t bus, device_t dev, 94 int irq); 95static int vmbus_map_msi(device_t bus, device_t dev, 96 int irq, uint64_t *addr, uint32_t *data); 97static uint32_t vmbus_get_version_method(device_t, device_t); 98static int vmbus_probe_guid_method(device_t, device_t, 99 const struct hyperv_guid *); 100static uint32_t vmbus_get_vcpu_id_method(device_t bus, 101 device_t dev, int cpu); 102static struct taskqueue *vmbus_get_eventtq_method(device_t, device_t, 103 int); 104#ifdef EARLY_AP_STARTUP 105static void vmbus_intrhook(void *); 106#endif 107 108static int vmbus_init(struct vmbus_softc *); 109static int vmbus_connect(struct vmbus_softc *, uint32_t); 110static int vmbus_req_channels(struct vmbus_softc *sc); 111static void vmbus_disconnect(struct vmbus_softc *); 112static int vmbus_scan(struct vmbus_softc *); 113static void vmbus_scan_teardown(struct vmbus_softc *); 114static void vmbus_scan_done(struct vmbus_softc *, 115 const struct vmbus_message *); 116static void vmbus_chanmsg_handle(struct vmbus_softc *, 117 const struct vmbus_message *); 118static void vmbus_msg_task(void *, int); 119static void vmbus_synic_setup(void *); 120static void vmbus_synic_teardown(void *); 121static int vmbus_sysctl_version(SYSCTL_HANDLER_ARGS); 122static int vmbus_dma_alloc(struct vmbus_softc *); 123static void vmbus_dma_free(struct vmbus_softc *); 124static int vmbus_intr_setup(struct vmbus_softc *); 125static void vmbus_intr_teardown(struct vmbus_softc *); 126static int vmbus_doattach(struct vmbus_softc *); 127static void vmbus_event_proc_dummy(struct vmbus_softc *, 128 int); 129 130static struct vmbus_softc *vmbus_sc; 131 132SYSCTL_NODE(_hw, OID_AUTO, vmbus, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 133 "Hyper-V vmbus"); 134 135static int vmbus_pin_evttask = 1; 136SYSCTL_INT(_hw_vmbus, OID_AUTO, pin_evttask, CTLFLAG_RDTUN, 137 &vmbus_pin_evttask, 0, "Pin event tasks to their respective CPU"); 138 139extern inthand_t IDTVEC(vmbus_isr), IDTVEC(vmbus_isr_pti); 140 141static const uint32_t vmbus_version[] = { 142 VMBUS_VERSION_WIN8_1, 143 VMBUS_VERSION_WIN8, 144 VMBUS_VERSION_WIN7, 145 VMBUS_VERSION_WS2008 146}; 147 148static const vmbus_chanmsg_proc_t 149vmbus_chanmsg_handlers[VMBUS_CHANMSG_TYPE_MAX] = { 150 VMBUS_CHANMSG_PROC(CHOFFER_DONE, vmbus_scan_done), 151 VMBUS_CHANMSG_PROC_WAKEUP(CONNECT_RESP) 152}; 153 154static device_method_t vmbus_methods[] = { 155 /* Device interface */ 156 DEVMETHOD(device_identify, vmbus_identify), 157 DEVMETHOD(device_probe, vmbus_probe), 158 DEVMETHOD(device_attach, vmbus_attach), 159 DEVMETHOD(device_detach, vmbus_detach), 160 DEVMETHOD(device_shutdown, bus_generic_shutdown), 161 DEVMETHOD(device_suspend, bus_generic_suspend), 162 DEVMETHOD(device_resume, bus_generic_resume), 163 164 /* Bus interface */ 165 DEVMETHOD(bus_add_child, bus_generic_add_child), 166 DEVMETHOD(bus_print_child, bus_generic_print_child), 167 DEVMETHOD(bus_read_ivar, vmbus_read_ivar), 168 DEVMETHOD(bus_child_pnpinfo_str, vmbus_child_pnpinfo_str), 169 DEVMETHOD(bus_alloc_resource, vmbus_alloc_resource), 170 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 171 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 172 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 173 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 174 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 175#if __FreeBSD_version >= 1100000 176 DEVMETHOD(bus_get_cpus, bus_generic_get_cpus), 177#endif 178 179 /* pcib interface */ 180 DEVMETHOD(pcib_alloc_msi, vmbus_alloc_msi), 181 DEVMETHOD(pcib_release_msi, vmbus_release_msi), 182 DEVMETHOD(pcib_alloc_msix, vmbus_alloc_msix), 183 DEVMETHOD(pcib_release_msix, vmbus_release_msix), 184 DEVMETHOD(pcib_map_msi, vmbus_map_msi), 185 186 /* Vmbus interface */ 187 DEVMETHOD(vmbus_get_version, vmbus_get_version_method), 188 DEVMETHOD(vmbus_probe_guid, vmbus_probe_guid_method), 189 DEVMETHOD(vmbus_get_vcpu_id, vmbus_get_vcpu_id_method), 190 DEVMETHOD(vmbus_get_event_taskq, vmbus_get_eventtq_method), 191 192 DEVMETHOD_END 193}; 194 195static driver_t vmbus_driver = { 196 "vmbus", 197 vmbus_methods, 198 sizeof(struct vmbus_softc) 199}; 200 201static devclass_t vmbus_devclass; 202 203DRIVER_MODULE(vmbus, pcib, vmbus_driver, vmbus_devclass, NULL, NULL); 204DRIVER_MODULE(vmbus, acpi_syscontainer, vmbus_driver, vmbus_devclass, 205 NULL, NULL); 206 207MODULE_DEPEND(vmbus, acpi, 1, 1, 1); 208MODULE_DEPEND(vmbus, pci, 1, 1, 1); 209MODULE_VERSION(vmbus, 1); 210 211static __inline struct vmbus_softc * 212vmbus_get_softc(void) 213{ 214 return vmbus_sc; 215} 216 217void 218vmbus_msghc_reset(struct vmbus_msghc *mh, size_t dsize) 219{ 220 struct hypercall_postmsg_in *inprm; 221 222 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 223 panic("invalid data size %zu", dsize); 224 225 inprm = vmbus_xact_req_data(mh->mh_xact); 226 memset(inprm, 0, HYPERCALL_POSTMSGIN_SIZE); 227 inprm->hc_connid = VMBUS_CONNID_MESSAGE; 228 inprm->hc_msgtype = HYPERV_MSGTYPE_CHANNEL; 229 inprm->hc_dsize = dsize; 230} 231 232struct vmbus_msghc * 233vmbus_msghc_get(struct vmbus_softc *sc, size_t dsize) 234{ 235 struct vmbus_msghc *mh; 236 struct vmbus_xact *xact; 237 238 if (dsize > HYPERCALL_POSTMSGIN_DSIZE_MAX) 239 panic("invalid data size %zu", dsize); 240 241 xact = vmbus_xact_get(sc->vmbus_xc, 242 dsize + __offsetof(struct hypercall_postmsg_in, hc_data[0])); 243 if (xact == NULL) 244 return (NULL); 245 246 mh = vmbus_xact_priv(xact, sizeof(*mh)); 247 mh->mh_xact = xact; 248 249 vmbus_msghc_reset(mh, dsize); 250 return (mh); 251} 252 253void 254vmbus_msghc_put(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 255{ 256 257 vmbus_xact_put(mh->mh_xact); 258} 259 260void * 261vmbus_msghc_dataptr(struct vmbus_msghc *mh) 262{ 263 struct hypercall_postmsg_in *inprm; 264 265 inprm = vmbus_xact_req_data(mh->mh_xact); 266 return (inprm->hc_data); 267} 268 269int 270vmbus_msghc_exec_noresult(struct vmbus_msghc *mh) 271{ 272 sbintime_t time = SBT_1MS; 273 struct hypercall_postmsg_in *inprm; 274 bus_addr_t inprm_paddr; 275 int i; 276 277 inprm = vmbus_xact_req_data(mh->mh_xact); 278 inprm_paddr = vmbus_xact_req_paddr(mh->mh_xact); 279 280 /* 281 * Save the input parameter so that we could restore the input 282 * parameter if the Hypercall failed. 283 * 284 * XXX 285 * Is this really necessary?! i.e. Will the Hypercall ever 286 * overwrite the input parameter? 287 */ 288 memcpy(&mh->mh_inprm_save, inprm, HYPERCALL_POSTMSGIN_SIZE); 289 290 /* 291 * In order to cope with transient failures, e.g. insufficient 292 * resources on host side, we retry the post message Hypercall 293 * several times. 20 retries seem sufficient. 294 */ 295#define HC_RETRY_MAX 20 296 297 for (i = 0; i < HC_RETRY_MAX; ++i) { 298 uint64_t status; 299 300 status = hypercall_post_message(inprm_paddr); 301 if (status == HYPERCALL_STATUS_SUCCESS) 302 return 0; 303 304 pause_sbt("hcpmsg", time, 0, C_HARDCLOCK); 305 if (time < SBT_1S * 2) 306 time *= 2; 307 308 /* Restore input parameter and try again */ 309 memcpy(inprm, &mh->mh_inprm_save, HYPERCALL_POSTMSGIN_SIZE); 310 } 311 312#undef HC_RETRY_MAX 313 314 return EIO; 315} 316 317int 318vmbus_msghc_exec(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 319{ 320 int error; 321 322 vmbus_xact_activate(mh->mh_xact); 323 error = vmbus_msghc_exec_noresult(mh); 324 if (error) 325 vmbus_xact_deactivate(mh->mh_xact); 326 return error; 327} 328 329void 330vmbus_msghc_exec_cancel(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 331{ 332 333 vmbus_xact_deactivate(mh->mh_xact); 334} 335 336const struct vmbus_message * 337vmbus_msghc_wait_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 338{ 339 size_t resp_len; 340 341 return (vmbus_xact_wait(mh->mh_xact, &resp_len)); 342} 343 344const struct vmbus_message * 345vmbus_msghc_poll_result(struct vmbus_softc *sc __unused, struct vmbus_msghc *mh) 346{ 347 size_t resp_len; 348 349 return (vmbus_xact_poll(mh->mh_xact, &resp_len)); 350} 351 352void 353vmbus_msghc_wakeup(struct vmbus_softc *sc, const struct vmbus_message *msg) 354{ 355 356 vmbus_xact_ctx_wakeup(sc->vmbus_xc, msg, sizeof(*msg)); 357} 358 359uint32_t 360vmbus_gpadl_alloc(struct vmbus_softc *sc) 361{ 362 uint32_t gpadl; 363 364again: 365 gpadl = atomic_fetchadd_int(&sc->vmbus_gpadl, 1); 366 if (gpadl == 0) 367 goto again; 368 return (gpadl); 369} 370 371static int 372vmbus_connect(struct vmbus_softc *sc, uint32_t version) 373{ 374 struct vmbus_chanmsg_connect *req; 375 const struct vmbus_message *msg; 376 struct vmbus_msghc *mh; 377 int error, done = 0; 378 379 mh = vmbus_msghc_get(sc, sizeof(*req)); 380 if (mh == NULL) 381 return ENXIO; 382 383 req = vmbus_msghc_dataptr(mh); 384 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CONNECT; 385 req->chm_ver = version; 386 req->chm_evtflags = sc->vmbus_evtflags_dma.hv_paddr; 387 req->chm_mnf1 = sc->vmbus_mnf1_dma.hv_paddr; 388 req->chm_mnf2 = sc->vmbus_mnf2_dma.hv_paddr; 389 390 error = vmbus_msghc_exec(sc, mh); 391 if (error) { 392 vmbus_msghc_put(sc, mh); 393 return error; 394 } 395 396 msg = vmbus_msghc_wait_result(sc, mh); 397 done = ((const struct vmbus_chanmsg_connect_resp *) 398 msg->msg_data)->chm_done; 399 400 vmbus_msghc_put(sc, mh); 401 402 return (done ? 0 : EOPNOTSUPP); 403} 404 405static int 406vmbus_init(struct vmbus_softc *sc) 407{ 408 int i; 409 410 for (i = 0; i < nitems(vmbus_version); ++i) { 411 int error; 412 413 error = vmbus_connect(sc, vmbus_version[i]); 414 if (!error) { 415 sc->vmbus_version = vmbus_version[i]; 416 device_printf(sc->vmbus_dev, "version %u.%u\n", 417 VMBUS_VERSION_MAJOR(sc->vmbus_version), 418 VMBUS_VERSION_MINOR(sc->vmbus_version)); 419 return 0; 420 } 421 } 422 return ENXIO; 423} 424 425static void 426vmbus_disconnect(struct vmbus_softc *sc) 427{ 428 struct vmbus_chanmsg_disconnect *req; 429 struct vmbus_msghc *mh; 430 int error; 431 432 mh = vmbus_msghc_get(sc, sizeof(*req)); 433 if (mh == NULL) { 434 device_printf(sc->vmbus_dev, 435 "can not get msg hypercall for disconnect\n"); 436 return; 437 } 438 439 req = vmbus_msghc_dataptr(mh); 440 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_DISCONNECT; 441 442 error = vmbus_msghc_exec_noresult(mh); 443 vmbus_msghc_put(sc, mh); 444 445 if (error) { 446 device_printf(sc->vmbus_dev, 447 "disconnect msg hypercall failed\n"); 448 } 449} 450 451static int 452vmbus_req_channels(struct vmbus_softc *sc) 453{ 454 struct vmbus_chanmsg_chrequest *req; 455 struct vmbus_msghc *mh; 456 int error; 457 458 mh = vmbus_msghc_get(sc, sizeof(*req)); 459 if (mh == NULL) 460 return ENXIO; 461 462 req = vmbus_msghc_dataptr(mh); 463 req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHREQUEST; 464 465 error = vmbus_msghc_exec_noresult(mh); 466 vmbus_msghc_put(sc, mh); 467 468 return error; 469} 470 471static void 472vmbus_scan_done_task(void *xsc, int pending __unused) 473{ 474 struct vmbus_softc *sc = xsc; 475 476 mtx_lock(&Giant); 477 sc->vmbus_scandone = true; 478 mtx_unlock(&Giant); 479 wakeup(&sc->vmbus_scandone); 480} 481 482static void 483vmbus_scan_done(struct vmbus_softc *sc, 484 const struct vmbus_message *msg __unused) 485{ 486 487 taskqueue_enqueue(sc->vmbus_devtq, &sc->vmbus_scandone_task); 488} 489 490static int 491vmbus_scan(struct vmbus_softc *sc) 492{ 493 int error; 494 495 /* 496 * Identify, probe and attach for non-channel devices. 497 */ 498 bus_generic_probe(sc->vmbus_dev); 499 bus_generic_attach(sc->vmbus_dev); 500 501 /* 502 * This taskqueue serializes vmbus devices' attach and detach 503 * for channel offer and rescind messages. 504 */ 505 sc->vmbus_devtq = taskqueue_create("vmbus dev", M_WAITOK, 506 taskqueue_thread_enqueue, &sc->vmbus_devtq); 507 taskqueue_start_threads(&sc->vmbus_devtq, 1, PI_NET, "vmbusdev"); 508 TASK_INIT(&sc->vmbus_scandone_task, 0, vmbus_scan_done_task, sc); 509 510 /* 511 * This taskqueue handles sub-channel detach, so that vmbus 512 * device's detach running in vmbus_devtq can drain its sub- 513 * channels. 514 */ 515 sc->vmbus_subchtq = taskqueue_create("vmbus subch", M_WAITOK, 516 taskqueue_thread_enqueue, &sc->vmbus_subchtq); 517 taskqueue_start_threads(&sc->vmbus_subchtq, 1, PI_NET, "vmbussch"); 518 519 /* 520 * Start vmbus scanning. 521 */ 522 error = vmbus_req_channels(sc); 523 if (error) { 524 device_printf(sc->vmbus_dev, "channel request failed: %d\n", 525 error); 526 return (error); 527 } 528 529 /* 530 * Wait for all vmbus devices from the initial channel offers to be 531 * attached. 532 */ 533 GIANT_REQUIRED; 534 while (!sc->vmbus_scandone) 535 mtx_sleep(&sc->vmbus_scandone, &Giant, 0, "vmbusdev", 0); 536 537 if (bootverbose) { 538 device_printf(sc->vmbus_dev, "device scan, probe and attach " 539 "done\n"); 540 } 541 return (0); 542} 543 544static void 545vmbus_scan_teardown(struct vmbus_softc *sc) 546{ 547 548 GIANT_REQUIRED; 549 if (sc->vmbus_devtq != NULL) { 550 mtx_unlock(&Giant); 551 taskqueue_free(sc->vmbus_devtq); 552 mtx_lock(&Giant); 553 sc->vmbus_devtq = NULL; 554 } 555 if (sc->vmbus_subchtq != NULL) { 556 mtx_unlock(&Giant); 557 taskqueue_free(sc->vmbus_subchtq); 558 mtx_lock(&Giant); 559 sc->vmbus_subchtq = NULL; 560 } 561} 562 563static void 564vmbus_chanmsg_handle(struct vmbus_softc *sc, const struct vmbus_message *msg) 565{ 566 vmbus_chanmsg_proc_t msg_proc; 567 uint32_t msg_type; 568 569 msg_type = ((const struct vmbus_chanmsg_hdr *)msg->msg_data)->chm_type; 570 if (msg_type >= VMBUS_CHANMSG_TYPE_MAX) { 571 device_printf(sc->vmbus_dev, "unknown message type 0x%x\n", 572 msg_type); 573 return; 574 } 575 576 msg_proc = vmbus_chanmsg_handlers[msg_type]; 577 if (msg_proc != NULL) 578 msg_proc(sc, msg); 579 580 /* Channel specific processing */ 581 vmbus_chan_msgproc(sc, msg); 582} 583 584static void 585vmbus_msg_task(void *xsc, int pending __unused) 586{ 587 struct vmbus_softc *sc = xsc; 588 volatile struct vmbus_message *msg; 589 590 msg = VMBUS_PCPU_GET(sc, message, curcpu) + VMBUS_SINT_MESSAGE; 591 for (;;) { 592 if (msg->msg_type == HYPERV_MSGTYPE_NONE) { 593 /* No message */ 594 break; 595 } else if (msg->msg_type == HYPERV_MSGTYPE_CHANNEL) { 596 /* Channel message */ 597 vmbus_chanmsg_handle(sc, 598 __DEVOLATILE(const struct vmbus_message *, msg)); 599 } 600 601 msg->msg_type = HYPERV_MSGTYPE_NONE; 602 /* 603 * Make sure the write to msg_type (i.e. set to 604 * HYPERV_MSGTYPE_NONE) happens before we read the 605 * msg_flags and EOMing. Otherwise, the EOMing will 606 * not deliver any more messages since there is no 607 * empty slot 608 * 609 * NOTE: 610 * mb() is used here, since atomic_thread_fence_seq_cst() 611 * will become compiler fence on UP kernel. 612 */ 613 mb(); 614 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 615 /* 616 * This will cause message queue rescan to possibly 617 * deliver another msg from the hypervisor 618 */ 619 wrmsr(MSR_HV_EOM, 0); 620 } 621 } 622} 623 624static __inline int 625vmbus_handle_intr1(struct vmbus_softc *sc, struct trapframe *frame, int cpu) 626{ 627 volatile struct vmbus_message *msg; 628 struct vmbus_message *msg_base; 629 630 msg_base = VMBUS_PCPU_GET(sc, message, cpu); 631 632 /* 633 * Check event timer. 634 * 635 * TODO: move this to independent IDT vector. 636 */ 637 msg = msg_base + VMBUS_SINT_TIMER; 638 if (msg->msg_type == HYPERV_MSGTYPE_TIMER_EXPIRED) { 639 msg->msg_type = HYPERV_MSGTYPE_NONE; 640 641 vmbus_et_intr(frame); 642 643 /* 644 * Make sure the write to msg_type (i.e. set to 645 * HYPERV_MSGTYPE_NONE) happens before we read the 646 * msg_flags and EOMing. Otherwise, the EOMing will 647 * not deliver any more messages since there is no 648 * empty slot 649 * 650 * NOTE: 651 * mb() is used here, since atomic_thread_fence_seq_cst() 652 * will become compiler fence on UP kernel. 653 */ 654 mb(); 655 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) { 656 /* 657 * This will cause message queue rescan to possibly 658 * deliver another msg from the hypervisor 659 */ 660 wrmsr(MSR_HV_EOM, 0); 661 } 662 } 663 664 /* 665 * Check events. Hot path for network and storage I/O data; high rate. 666 * 667 * NOTE: 668 * As recommended by the Windows guest fellows, we check events before 669 * checking messages. 670 */ 671 sc->vmbus_event_proc(sc, cpu); 672 673 /* 674 * Check messages. Mainly management stuffs; ultra low rate. 675 */ 676 msg = msg_base + VMBUS_SINT_MESSAGE; 677 if (__predict_false(msg->msg_type != HYPERV_MSGTYPE_NONE)) { 678 taskqueue_enqueue(VMBUS_PCPU_GET(sc, message_tq, cpu), 679 VMBUS_PCPU_PTR(sc, message_task, cpu)); 680 } 681 682 return (FILTER_HANDLED); 683} 684 685void 686vmbus_handle_intr(struct trapframe *trap_frame) 687{ 688 struct vmbus_softc *sc = vmbus_get_softc(); 689 int cpu = curcpu; 690 691 /* 692 * Disable preemption. 693 */ 694 critical_enter(); 695 696 /* 697 * Do a little interrupt counting. 698 */ 699 (*VMBUS_PCPU_GET(sc, intr_cnt, cpu))++; 700 701 vmbus_handle_intr1(sc, trap_frame, cpu); 702 703 /* 704 * Enable preemption. 705 */ 706 critical_exit(); 707} 708 709static void 710vmbus_synic_setup(void *xsc) 711{ 712 struct vmbus_softc *sc = xsc; 713 int cpu = curcpu; 714 uint64_t val, orig; 715 uint32_t sint; 716 717 if (hyperv_features & CPUID_HV_MSR_VP_INDEX) { 718 /* Save virtual processor id. */ 719 VMBUS_PCPU_GET(sc, vcpuid, cpu) = rdmsr(MSR_HV_VP_INDEX); 720 } else { 721 /* Set virtual processor id to 0 for compatibility. */ 722 VMBUS_PCPU_GET(sc, vcpuid, cpu) = 0; 723 } 724 725 /* 726 * Setup the SynIC message. 727 */ 728 orig = rdmsr(MSR_HV_SIMP); 729 val = MSR_HV_SIMP_ENABLE | (orig & MSR_HV_SIMP_RSVD_MASK) | 730 ((VMBUS_PCPU_GET(sc, message_dma.hv_paddr, cpu) >> PAGE_SHIFT) << 731 MSR_HV_SIMP_PGSHIFT); 732 wrmsr(MSR_HV_SIMP, val); 733 734 /* 735 * Setup the SynIC event flags. 736 */ 737 orig = rdmsr(MSR_HV_SIEFP); 738 val = MSR_HV_SIEFP_ENABLE | (orig & MSR_HV_SIEFP_RSVD_MASK) | 739 ((VMBUS_PCPU_GET(sc, event_flags_dma.hv_paddr, cpu) 740 >> PAGE_SHIFT) << MSR_HV_SIEFP_PGSHIFT); 741 wrmsr(MSR_HV_SIEFP, val); 742 743 744 /* 745 * Configure and unmask SINT for message and event flags. 746 */ 747 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 748 orig = rdmsr(sint); 749 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 750 (orig & MSR_HV_SINT_RSVD_MASK); 751 wrmsr(sint, val); 752 753 /* 754 * Configure and unmask SINT for timer. 755 */ 756 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 757 orig = rdmsr(sint); 758 val = sc->vmbus_idtvec | MSR_HV_SINT_AUTOEOI | 759 (orig & MSR_HV_SINT_RSVD_MASK); 760 wrmsr(sint, val); 761 762 /* 763 * All done; enable SynIC. 764 */ 765 orig = rdmsr(MSR_HV_SCONTROL); 766 val = MSR_HV_SCTRL_ENABLE | (orig & MSR_HV_SCTRL_RSVD_MASK); 767 wrmsr(MSR_HV_SCONTROL, val); 768} 769 770static void 771vmbus_synic_teardown(void *arg) 772{ 773 uint64_t orig; 774 uint32_t sint; 775 776 /* 777 * Disable SynIC. 778 */ 779 orig = rdmsr(MSR_HV_SCONTROL); 780 wrmsr(MSR_HV_SCONTROL, (orig & MSR_HV_SCTRL_RSVD_MASK)); 781 782 /* 783 * Mask message and event flags SINT. 784 */ 785 sint = MSR_HV_SINT0 + VMBUS_SINT_MESSAGE; 786 orig = rdmsr(sint); 787 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 788 789 /* 790 * Mask timer SINT. 791 */ 792 sint = MSR_HV_SINT0 + VMBUS_SINT_TIMER; 793 orig = rdmsr(sint); 794 wrmsr(sint, orig | MSR_HV_SINT_MASKED); 795 796 /* 797 * Teardown SynIC message. 798 */ 799 orig = rdmsr(MSR_HV_SIMP); 800 wrmsr(MSR_HV_SIMP, (orig & MSR_HV_SIMP_RSVD_MASK)); 801 802 /* 803 * Teardown SynIC event flags. 804 */ 805 orig = rdmsr(MSR_HV_SIEFP); 806 wrmsr(MSR_HV_SIEFP, (orig & MSR_HV_SIEFP_RSVD_MASK)); 807} 808 809static int 810vmbus_dma_alloc(struct vmbus_softc *sc) 811{ 812 bus_dma_tag_t parent_dtag; 813 uint8_t *evtflags; 814 int cpu; 815 816 parent_dtag = bus_get_dma_tag(sc->vmbus_dev); 817 CPU_FOREACH(cpu) { 818 void *ptr; 819 820 /* 821 * Per-cpu messages and event flags. 822 */ 823 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 824 PAGE_SIZE, VMBUS_PCPU_PTR(sc, message_dma, cpu), 825 BUS_DMA_WAITOK | BUS_DMA_ZERO); 826 if (ptr == NULL) 827 return ENOMEM; 828 VMBUS_PCPU_GET(sc, message, cpu) = ptr; 829 830 ptr = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 831 PAGE_SIZE, VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 832 BUS_DMA_WAITOK | BUS_DMA_ZERO); 833 if (ptr == NULL) 834 return ENOMEM; 835 VMBUS_PCPU_GET(sc, event_flags, cpu) = ptr; 836 } 837 838 evtflags = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 839 PAGE_SIZE, &sc->vmbus_evtflags_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 840 if (evtflags == NULL) 841 return ENOMEM; 842 sc->vmbus_rx_evtflags = (u_long *)evtflags; 843 sc->vmbus_tx_evtflags = (u_long *)(evtflags + (PAGE_SIZE / 2)); 844 sc->vmbus_evtflags = evtflags; 845 846 sc->vmbus_mnf1 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 847 PAGE_SIZE, &sc->vmbus_mnf1_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 848 if (sc->vmbus_mnf1 == NULL) 849 return ENOMEM; 850 851 sc->vmbus_mnf2 = hyperv_dmamem_alloc(parent_dtag, PAGE_SIZE, 0, 852 sizeof(struct vmbus_mnf), &sc->vmbus_mnf2_dma, 853 BUS_DMA_WAITOK | BUS_DMA_ZERO); 854 if (sc->vmbus_mnf2 == NULL) 855 return ENOMEM; 856 857 return 0; 858} 859 860static void 861vmbus_dma_free(struct vmbus_softc *sc) 862{ 863 int cpu; 864 865 if (sc->vmbus_evtflags != NULL) { 866 hyperv_dmamem_free(&sc->vmbus_evtflags_dma, sc->vmbus_evtflags); 867 sc->vmbus_evtflags = NULL; 868 sc->vmbus_rx_evtflags = NULL; 869 sc->vmbus_tx_evtflags = NULL; 870 } 871 if (sc->vmbus_mnf1 != NULL) { 872 hyperv_dmamem_free(&sc->vmbus_mnf1_dma, sc->vmbus_mnf1); 873 sc->vmbus_mnf1 = NULL; 874 } 875 if (sc->vmbus_mnf2 != NULL) { 876 hyperv_dmamem_free(&sc->vmbus_mnf2_dma, sc->vmbus_mnf2); 877 sc->vmbus_mnf2 = NULL; 878 } 879 880 CPU_FOREACH(cpu) { 881 if (VMBUS_PCPU_GET(sc, message, cpu) != NULL) { 882 hyperv_dmamem_free( 883 VMBUS_PCPU_PTR(sc, message_dma, cpu), 884 VMBUS_PCPU_GET(sc, message, cpu)); 885 VMBUS_PCPU_GET(sc, message, cpu) = NULL; 886 } 887 if (VMBUS_PCPU_GET(sc, event_flags, cpu) != NULL) { 888 hyperv_dmamem_free( 889 VMBUS_PCPU_PTR(sc, event_flags_dma, cpu), 890 VMBUS_PCPU_GET(sc, event_flags, cpu)); 891 VMBUS_PCPU_GET(sc, event_flags, cpu) = NULL; 892 } 893 } 894} 895 896static int 897vmbus_intr_setup(struct vmbus_softc *sc) 898{ 899 int cpu; 900 901 CPU_FOREACH(cpu) { 902 char buf[MAXCOMLEN + 1]; 903 cpuset_t cpu_mask; 904 905 /* Allocate an interrupt counter for Hyper-V interrupt */ 906 snprintf(buf, sizeof(buf), "cpu%d:hyperv", cpu); 907 intrcnt_add(buf, VMBUS_PCPU_PTR(sc, intr_cnt, cpu)); 908 909 /* 910 * Setup taskqueue to handle events. Task will be per- 911 * channel. 912 */ 913 VMBUS_PCPU_GET(sc, event_tq, cpu) = taskqueue_create_fast( 914 "hyperv event", M_WAITOK, taskqueue_thread_enqueue, 915 VMBUS_PCPU_PTR(sc, event_tq, cpu)); 916 if (vmbus_pin_evttask) { 917 CPU_SETOF(cpu, &cpu_mask); 918 taskqueue_start_threads_cpuset( 919 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 920 &cpu_mask, "hvevent%d", cpu); 921 } else { 922 taskqueue_start_threads( 923 VMBUS_PCPU_PTR(sc, event_tq, cpu), 1, PI_NET, 924 "hvevent%d", cpu); 925 } 926 927 /* 928 * Setup tasks and taskqueues to handle messages. 929 */ 930 VMBUS_PCPU_GET(sc, message_tq, cpu) = taskqueue_create_fast( 931 "hyperv msg", M_WAITOK, taskqueue_thread_enqueue, 932 VMBUS_PCPU_PTR(sc, message_tq, cpu)); 933 CPU_SETOF(cpu, &cpu_mask); 934 taskqueue_start_threads_cpuset( 935 VMBUS_PCPU_PTR(sc, message_tq, cpu), 1, PI_NET, &cpu_mask, 936 "hvmsg%d", cpu); 937 TASK_INIT(VMBUS_PCPU_PTR(sc, message_task, cpu), 0, 938 vmbus_msg_task, sc); 939 } 940 941 /* 942 * All Hyper-V ISR required resources are setup, now let's find a 943 * free IDT vector for Hyper-V ISR and set it up. 944 */ 945 sc->vmbus_idtvec = lapic_ipi_alloc(pti ? IDTVEC(vmbus_isr_pti) : 946 IDTVEC(vmbus_isr)); 947 if (sc->vmbus_idtvec < 0) { 948 device_printf(sc->vmbus_dev, "cannot find free IDT vector\n"); 949 return ENXIO; 950 } 951 if (bootverbose) { 952 device_printf(sc->vmbus_dev, "vmbus IDT vector %d\n", 953 sc->vmbus_idtvec); 954 } 955 return 0; 956} 957 958static void 959vmbus_intr_teardown(struct vmbus_softc *sc) 960{ 961 int cpu; 962 963 if (sc->vmbus_idtvec >= 0) { 964 lapic_ipi_free(sc->vmbus_idtvec); 965 sc->vmbus_idtvec = -1; 966 } 967 968 CPU_FOREACH(cpu) { 969 if (VMBUS_PCPU_GET(sc, event_tq, cpu) != NULL) { 970 taskqueue_free(VMBUS_PCPU_GET(sc, event_tq, cpu)); 971 VMBUS_PCPU_GET(sc, event_tq, cpu) = NULL; 972 } 973 if (VMBUS_PCPU_GET(sc, message_tq, cpu) != NULL) { 974 taskqueue_drain(VMBUS_PCPU_GET(sc, message_tq, cpu), 975 VMBUS_PCPU_PTR(sc, message_task, cpu)); 976 taskqueue_free(VMBUS_PCPU_GET(sc, message_tq, cpu)); 977 VMBUS_PCPU_GET(sc, message_tq, cpu) = NULL; 978 } 979 } 980} 981 982static int 983vmbus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 984{ 985 return (ENOENT); 986} 987 988static int 989vmbus_child_pnpinfo_str(device_t dev, device_t child, char *buf, size_t buflen) 990{ 991 const struct vmbus_channel *chan; 992 char guidbuf[HYPERV_GUID_STRLEN]; 993 994 chan = vmbus_get_channel(child); 995 if (chan == NULL) { 996 /* Event timer device, which does not belong to a channel */ 997 return (0); 998 } 999 1000 strlcat(buf, "classid=", buflen); 1001 hyperv_guid2str(&chan->ch_guid_type, guidbuf, sizeof(guidbuf)); 1002 strlcat(buf, guidbuf, buflen); 1003 1004 strlcat(buf, " deviceid=", buflen); 1005 hyperv_guid2str(&chan->ch_guid_inst, guidbuf, sizeof(guidbuf)); 1006 strlcat(buf, guidbuf, buflen); 1007 1008 return (0); 1009} 1010 1011int 1012vmbus_add_child(struct vmbus_channel *chan) 1013{ 1014 struct vmbus_softc *sc = chan->ch_vmbus; 1015 device_t parent = sc->vmbus_dev; 1016 1017 mtx_lock(&Giant); 1018 1019 chan->ch_dev = device_add_child(parent, NULL, -1); 1020 if (chan->ch_dev == NULL) { 1021 mtx_unlock(&Giant); 1022 device_printf(parent, "device_add_child for chan%u failed\n", 1023 chan->ch_id); 1024 return (ENXIO); 1025 } 1026 device_set_ivars(chan->ch_dev, chan); 1027 device_probe_and_attach(chan->ch_dev); 1028 1029 mtx_unlock(&Giant); 1030 return (0); 1031} 1032 1033int 1034vmbus_delete_child(struct vmbus_channel *chan) 1035{ 1036 int error = 0; 1037 1038 mtx_lock(&Giant); 1039 if (chan->ch_dev != NULL) { 1040 error = device_delete_child(chan->ch_vmbus->vmbus_dev, 1041 chan->ch_dev); 1042 chan->ch_dev = NULL; 1043 } 1044 mtx_unlock(&Giant); 1045 return (error); 1046} 1047 1048static int 1049vmbus_sysctl_version(SYSCTL_HANDLER_ARGS) 1050{ 1051 struct vmbus_softc *sc = arg1; 1052 char verstr[16]; 1053 1054 snprintf(verstr, sizeof(verstr), "%u.%u", 1055 VMBUS_VERSION_MAJOR(sc->vmbus_version), 1056 VMBUS_VERSION_MINOR(sc->vmbus_version)); 1057 return sysctl_handle_string(oidp, verstr, sizeof(verstr), req); 1058} 1059 1060/* 1061 * We need the function to make sure the MMIO resource is allocated from the 1062 * ranges found in _CRS. 1063 * 1064 * For the release function, we can use bus_generic_release_resource(). 1065 */ 1066static struct resource * 1067vmbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 1068 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1069{ 1070 device_t parent = device_get_parent(dev); 1071 struct resource *res; 1072 1073#ifdef NEW_PCIB 1074 if (type == SYS_RES_MEMORY) { 1075 struct vmbus_softc *sc = device_get_softc(dev); 1076 1077 res = pcib_host_res_alloc(&sc->vmbus_mmio_res, child, type, 1078 rid, start, end, count, flags); 1079 } else 1080#endif 1081 { 1082 res = BUS_ALLOC_RESOURCE(parent, child, type, rid, start, 1083 end, count, flags); 1084 } 1085 1086 return (res); 1087} 1088 1089static int 1090vmbus_alloc_msi(device_t bus, device_t dev, int count, int maxcount, int *irqs) 1091{ 1092 1093 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 1094 irqs)); 1095} 1096 1097static int 1098vmbus_release_msi(device_t bus, device_t dev, int count, int *irqs) 1099{ 1100 1101 return (PCIB_RELEASE_MSI(device_get_parent(bus), dev, count, irqs)); 1102} 1103 1104static int 1105vmbus_alloc_msix(device_t bus, device_t dev, int *irq) 1106{ 1107 1108 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 1109} 1110 1111static int 1112vmbus_release_msix(device_t bus, device_t dev, int irq) 1113{ 1114 1115 return (PCIB_RELEASE_MSIX(device_get_parent(bus), dev, irq)); 1116} 1117 1118static int 1119vmbus_map_msi(device_t bus, device_t dev, int irq, uint64_t *addr, 1120 uint32_t *data) 1121{ 1122 1123 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 1124} 1125 1126static uint32_t 1127vmbus_get_version_method(device_t bus, device_t dev) 1128{ 1129 struct vmbus_softc *sc = device_get_softc(bus); 1130 1131 return sc->vmbus_version; 1132} 1133 1134static int 1135vmbus_probe_guid_method(device_t bus, device_t dev, 1136 const struct hyperv_guid *guid) 1137{ 1138 const struct vmbus_channel *chan = vmbus_get_channel(dev); 1139 1140 if (memcmp(&chan->ch_guid_type, guid, sizeof(struct hyperv_guid)) == 0) 1141 return 0; 1142 return ENXIO; 1143} 1144 1145static uint32_t 1146vmbus_get_vcpu_id_method(device_t bus, device_t dev, int cpu) 1147{ 1148 const struct vmbus_softc *sc = device_get_softc(bus); 1149 1150 return (VMBUS_PCPU_GET(sc, vcpuid, cpu)); 1151} 1152 1153static struct taskqueue * 1154vmbus_get_eventtq_method(device_t bus, device_t dev __unused, int cpu) 1155{ 1156 const struct vmbus_softc *sc = device_get_softc(bus); 1157 1158 KASSERT(cpu >= 0 && cpu < mp_ncpus, ("invalid cpu%d", cpu)); 1159 return (VMBUS_PCPU_GET(sc, event_tq, cpu)); 1160} 1161 1162#ifdef NEW_PCIB 1163#define VTPM_BASE_ADDR 0xfed40000 1164#define FOUR_GB (1ULL << 32) 1165 1166enum parse_pass { parse_64, parse_32 }; 1167 1168struct parse_context { 1169 device_t vmbus_dev; 1170 enum parse_pass pass; 1171}; 1172 1173static ACPI_STATUS 1174parse_crs(ACPI_RESOURCE *res, void *ctx) 1175{ 1176 const struct parse_context *pc = ctx; 1177 device_t vmbus_dev = pc->vmbus_dev; 1178 1179 struct vmbus_softc *sc = device_get_softc(vmbus_dev); 1180 UINT64 start, end; 1181 1182 switch (res->Type) { 1183 case ACPI_RESOURCE_TYPE_ADDRESS32: 1184 start = res->Data.Address32.Address.Minimum; 1185 end = res->Data.Address32.Address.Maximum; 1186 break; 1187 1188 case ACPI_RESOURCE_TYPE_ADDRESS64: 1189 start = res->Data.Address64.Address.Minimum; 1190 end = res->Data.Address64.Address.Maximum; 1191 break; 1192 1193 default: 1194 /* Unused types. */ 1195 return (AE_OK); 1196 } 1197 1198 /* 1199 * We don't use <1MB addresses. 1200 */ 1201 if (end < 0x100000) 1202 return (AE_OK); 1203 1204 /* Don't conflict with vTPM. */ 1205 if (end >= VTPM_BASE_ADDR && start < VTPM_BASE_ADDR) 1206 end = VTPM_BASE_ADDR - 1; 1207 1208 if ((pc->pass == parse_32 && start < FOUR_GB) || 1209 (pc->pass == parse_64 && start >= FOUR_GB)) 1210 pcib_host_res_decodes(&sc->vmbus_mmio_res, SYS_RES_MEMORY, 1211 start, end, 0); 1212 1213 return (AE_OK); 1214} 1215 1216static void 1217vmbus_get_crs(device_t dev, device_t vmbus_dev, enum parse_pass pass) 1218{ 1219 struct parse_context pc; 1220 ACPI_STATUS status; 1221 1222 if (bootverbose) 1223 device_printf(dev, "walking _CRS, pass=%d\n", pass); 1224 1225 pc.vmbus_dev = vmbus_dev; 1226 pc.pass = pass; 1227 status = AcpiWalkResources(acpi_get_handle(dev), "_CRS", 1228 parse_crs, &pc); 1229 1230 if (bootverbose && ACPI_FAILURE(status)) 1231 device_printf(dev, "_CRS: not found, pass=%d\n", pass); 1232} 1233 1234static void 1235vmbus_get_mmio_res_pass(device_t dev, enum parse_pass pass) 1236{ 1237 device_t acpi0, parent; 1238 1239 parent = device_get_parent(dev); 1240 1241 acpi0 = device_get_parent(parent); 1242 if (strcmp("acpi0", device_get_nameunit(acpi0)) == 0) { 1243 device_t *children; 1244 int count; 1245 1246 /* 1247 * Try to locate VMBUS resources and find _CRS on them. 1248 */ 1249 if (device_get_children(acpi0, &children, &count) == 0) { 1250 int i; 1251 1252 for (i = 0; i < count; ++i) { 1253 if (!device_is_attached(children[i])) 1254 continue; 1255 1256 if (strcmp("vmbus_res", 1257 device_get_name(children[i])) == 0) 1258 vmbus_get_crs(children[i], dev, pass); 1259 } 1260 free(children, M_TEMP); 1261 } 1262 1263 /* 1264 * Try to find _CRS on acpi. 1265 */ 1266 vmbus_get_crs(acpi0, dev, pass); 1267 } else { 1268 device_printf(dev, "not grandchild of acpi\n"); 1269 } 1270 1271 /* 1272 * Try to find _CRS on parent. 1273 */ 1274 vmbus_get_crs(parent, dev, pass); 1275} 1276 1277static void 1278vmbus_get_mmio_res(device_t dev) 1279{ 1280 struct vmbus_softc *sc = device_get_softc(dev); 1281 /* 1282 * We walk the resources twice to make sure that: in the resource 1283 * list, the 32-bit resources appear behind the 64-bit resources. 1284 * NB: resource_list_add() uses INSERT_TAIL. This way, when we 1285 * iterate through the list to find a range for a 64-bit BAR in 1286 * vmbus_alloc_resource(), we can make sure we try to use >4GB 1287 * ranges first. 1288 */ 1289 pcib_host_res_init(dev, &sc->vmbus_mmio_res); 1290 1291 vmbus_get_mmio_res_pass(dev, parse_64); 1292 vmbus_get_mmio_res_pass(dev, parse_32); 1293} 1294 1295static void 1296vmbus_free_mmio_res(device_t dev) 1297{ 1298 struct vmbus_softc *sc = device_get_softc(dev); 1299 1300 pcib_host_res_free(dev, &sc->vmbus_mmio_res); 1301} 1302#endif /* NEW_PCIB */ 1303 1304static void 1305vmbus_identify(driver_t *driver, device_t parent) 1306{ 1307 1308 if (device_get_unit(parent) != 0 || vm_guest != VM_GUEST_HV || 1309 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1310 return; 1311 device_add_child(parent, "vmbus", -1); 1312} 1313 1314static int 1315vmbus_probe(device_t dev) 1316{ 1317 1318 if (device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV || 1319 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0) 1320 return (ENXIO); 1321 1322 device_set_desc(dev, "Hyper-V Vmbus"); 1323 return (BUS_PROBE_DEFAULT); 1324} 1325 1326/** 1327 * @brief Main vmbus driver initialization routine. 1328 * 1329 * Here, we 1330 * - initialize the vmbus driver context 1331 * - setup various driver entry points 1332 * - invoke the vmbus hv main init routine 1333 * - get the irq resource 1334 * - invoke the vmbus to add the vmbus root device 1335 * - setup the vmbus root device 1336 * - retrieve the channel offers 1337 */ 1338static int 1339vmbus_doattach(struct vmbus_softc *sc) 1340{ 1341 struct sysctl_oid_list *child; 1342 struct sysctl_ctx_list *ctx; 1343 int ret; 1344 1345 if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED) 1346 return (0); 1347 1348#ifdef NEW_PCIB 1349 vmbus_get_mmio_res(sc->vmbus_dev); 1350#endif 1351 1352 sc->vmbus_flags |= VMBUS_FLAG_ATTACHED; 1353 1354 sc->vmbus_gpadl = VMBUS_GPADL_START; 1355 mtx_init(&sc->vmbus_prichan_lock, "vmbus prichan", NULL, MTX_DEF); 1356 TAILQ_INIT(&sc->vmbus_prichans); 1357 mtx_init(&sc->vmbus_chan_lock, "vmbus channel", NULL, MTX_DEF); 1358 TAILQ_INIT(&sc->vmbus_chans); 1359 sc->vmbus_chmap = malloc( 1360 sizeof(struct vmbus_channel *) * VMBUS_CHAN_MAX, M_DEVBUF, 1361 M_WAITOK | M_ZERO); 1362 1363 /* 1364 * Create context for "post message" Hypercalls 1365 */ 1366 sc->vmbus_xc = vmbus_xact_ctx_create(bus_get_dma_tag(sc->vmbus_dev), 1367 HYPERCALL_POSTMSGIN_SIZE, VMBUS_MSG_SIZE, 1368 sizeof(struct vmbus_msghc)); 1369 if (sc->vmbus_xc == NULL) { 1370 ret = ENXIO; 1371 goto cleanup; 1372 } 1373 1374 /* 1375 * Allocate DMA stuffs. 1376 */ 1377 ret = vmbus_dma_alloc(sc); 1378 if (ret != 0) 1379 goto cleanup; 1380 1381 /* 1382 * Setup interrupt. 1383 */ 1384 ret = vmbus_intr_setup(sc); 1385 if (ret != 0) 1386 goto cleanup; 1387 1388 /* 1389 * Setup SynIC. 1390 */ 1391 if (bootverbose) 1392 device_printf(sc->vmbus_dev, "smp_started = %d\n", smp_started); 1393 smp_rendezvous(NULL, vmbus_synic_setup, NULL, sc); 1394 sc->vmbus_flags |= VMBUS_FLAG_SYNIC; 1395 1396 /* 1397 * Initialize vmbus, e.g. connect to Hypervisor. 1398 */ 1399 ret = vmbus_init(sc); 1400 if (ret != 0) 1401 goto cleanup; 1402 1403 if (sc->vmbus_version == VMBUS_VERSION_WS2008 || 1404 sc->vmbus_version == VMBUS_VERSION_WIN7) 1405 sc->vmbus_event_proc = vmbus_event_proc_compat; 1406 else 1407 sc->vmbus_event_proc = vmbus_event_proc; 1408 1409 ret = vmbus_scan(sc); 1410 if (ret != 0) 1411 goto cleanup; 1412 1413 ctx = device_get_sysctl_ctx(sc->vmbus_dev); 1414 child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->vmbus_dev)); 1415 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "version", 1416 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, 1417 vmbus_sysctl_version, "A", "vmbus version"); 1418 1419 return (ret); 1420 1421cleanup: 1422 vmbus_scan_teardown(sc); 1423 vmbus_intr_teardown(sc); 1424 vmbus_dma_free(sc); 1425 if (sc->vmbus_xc != NULL) { 1426 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1427 sc->vmbus_xc = NULL; 1428 } 1429 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1430 mtx_destroy(&sc->vmbus_prichan_lock); 1431 mtx_destroy(&sc->vmbus_chan_lock); 1432 1433 return (ret); 1434} 1435 1436static void 1437vmbus_event_proc_dummy(struct vmbus_softc *sc __unused, int cpu __unused) 1438{ 1439} 1440 1441#ifdef EARLY_AP_STARTUP 1442 1443static void 1444vmbus_intrhook(void *xsc) 1445{ 1446 struct vmbus_softc *sc = xsc; 1447 1448 if (bootverbose) 1449 device_printf(sc->vmbus_dev, "intrhook\n"); 1450 vmbus_doattach(sc); 1451 config_intrhook_disestablish(&sc->vmbus_intrhook); 1452} 1453 1454#endif /* EARLY_AP_STARTUP */ 1455 1456static int 1457vmbus_attach(device_t dev) 1458{ 1459 vmbus_sc = device_get_softc(dev); 1460 vmbus_sc->vmbus_dev = dev; 1461 vmbus_sc->vmbus_idtvec = -1; 1462 1463 /* 1464 * Event processing logic will be configured: 1465 * - After the vmbus protocol version negotiation. 1466 * - Before we request channel offers. 1467 */ 1468 vmbus_sc->vmbus_event_proc = vmbus_event_proc_dummy; 1469 1470#ifdef EARLY_AP_STARTUP 1471 /* 1472 * Defer the real attach until the pause(9) works as expected. 1473 */ 1474 vmbus_sc->vmbus_intrhook.ich_func = vmbus_intrhook; 1475 vmbus_sc->vmbus_intrhook.ich_arg = vmbus_sc; 1476 config_intrhook_establish(&vmbus_sc->vmbus_intrhook); 1477#else /* !EARLY_AP_STARTUP */ 1478 /* 1479 * If the system has already booted and thread 1480 * scheduling is possible indicated by the global 1481 * cold set to zero, we just call the driver 1482 * initialization directly. 1483 */ 1484 if (!cold) 1485 vmbus_doattach(vmbus_sc); 1486#endif /* EARLY_AP_STARTUP */ 1487 1488 return (0); 1489} 1490 1491static int 1492vmbus_detach(device_t dev) 1493{ 1494 struct vmbus_softc *sc = device_get_softc(dev); 1495 1496 bus_generic_detach(dev); 1497 vmbus_chan_destroy_all(sc); 1498 1499 vmbus_scan_teardown(sc); 1500 1501 vmbus_disconnect(sc); 1502 1503 if (sc->vmbus_flags & VMBUS_FLAG_SYNIC) { 1504 sc->vmbus_flags &= ~VMBUS_FLAG_SYNIC; 1505 smp_rendezvous(NULL, vmbus_synic_teardown, NULL, NULL); 1506 } 1507 1508 vmbus_intr_teardown(sc); 1509 vmbus_dma_free(sc); 1510 1511 if (sc->vmbus_xc != NULL) { 1512 vmbus_xact_ctx_destroy(sc->vmbus_xc); 1513 sc->vmbus_xc = NULL; 1514 } 1515 1516 free(__DEVOLATILE(void *, sc->vmbus_chmap), M_DEVBUF); 1517 mtx_destroy(&sc->vmbus_prichan_lock); 1518 mtx_destroy(&sc->vmbus_chan_lock); 1519 1520#ifdef NEW_PCIB 1521 vmbus_free_mmio_res(dev); 1522#endif 1523 1524 return (0); 1525} 1526 1527#ifndef EARLY_AP_STARTUP 1528 1529static void 1530vmbus_sysinit(void *arg __unused) 1531{ 1532 struct vmbus_softc *sc = vmbus_get_softc(); 1533 1534 if (vm_guest != VM_GUEST_HV || sc == NULL) 1535 return; 1536 1537 /* 1538 * If the system has already booted and thread 1539 * scheduling is possible, as indicated by the 1540 * global cold set to zero, we just call the driver 1541 * initialization directly. 1542 */ 1543 if (!cold) 1544 vmbus_doattach(sc); 1545} 1546/* 1547 * NOTE: 1548 * We have to start as the last step of SI_SUB_SMP, i.e. after SMP is 1549 * initialized. 1550 */ 1551SYSINIT(vmbus_initialize, SI_SUB_SMP, SI_ORDER_ANY, vmbus_sysinit, NULL); 1552 1553#endif /* !EARLY_AP_STARTUP */ 1554