1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 NetApp, 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, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/pciio.h> 41 #include <sys/rman.h> 42 #include <sys/smp.h> 43 #include <sys/sysctl.h> 44 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pcireg.h> 47 48 #include <machine/resource.h> 49 50 #include <machine/vmm.h> 51 #include <machine/vmm_dev.h> 52 53 #include "vmm_lapic.h" 54 #include "vmm_ktr.h" 55 56 #include "iommu.h" 57 #include "ppt.h" 58 59 /* XXX locking */ 60 61 #define MAX_MSIMSGS 32 62 63 /* 64 * If the MSI-X table is located in the middle of a BAR then that MMIO 65 * region gets split into two segments - one segment above the MSI-X table 66 * and the other segment below the MSI-X table - with a hole in place of 67 * the MSI-X table so accesses to it can be trapped and emulated. 68 * 69 * So, allocate a MMIO segment for each BAR register + 1 additional segment. 70 */ 71 #define MAX_MMIOSEGS ((PCIR_MAX_BAR_0 + 1) + 1) 72 73 MALLOC_DEFINE(M_PPTMSIX, "pptmsix", "Passthru MSI-X resources"); 74 75 struct pptintr_arg { /* pptintr(pptintr_arg) */ 76 struct pptdev *pptdev; 77 uint64_t addr; 78 uint64_t msg_data; 79 }; 80 81 struct pptseg { 82 vm_paddr_t gpa; 83 size_t len; 84 int wired; 85 }; 86 87 struct pptdev { 88 device_t dev; 89 struct vm *vm; /* owner of this device */ 90 TAILQ_ENTRY(pptdev) next; 91 struct pptseg mmio[MAX_MMIOSEGS]; 92 struct { 93 int num_msgs; /* guest state */ 94 95 int startrid; /* host state */ 96 struct resource *res[MAX_MSIMSGS]; 97 void *cookie[MAX_MSIMSGS]; 98 struct pptintr_arg arg[MAX_MSIMSGS]; 99 } msi; 100 101 struct { 102 int num_msgs; 103 int startrid; 104 int msix_table_rid; 105 int msix_pba_rid; 106 struct resource *msix_table_res; 107 struct resource *msix_pba_res; 108 struct resource **res; 109 void **cookie; 110 struct pptintr_arg *arg; 111 } msix; 112 }; 113 114 SYSCTL_DECL(_hw_vmm); 115 SYSCTL_NODE(_hw_vmm, OID_AUTO, ppt, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 116 "bhyve passthru devices"); 117 118 static int num_pptdevs; 119 SYSCTL_INT(_hw_vmm_ppt, OID_AUTO, devices, CTLFLAG_RD, &num_pptdevs, 0, 120 "number of pci passthru devices"); 121 122 static TAILQ_HEAD(, pptdev) pptdev_list = TAILQ_HEAD_INITIALIZER(pptdev_list); 123 124 static int 125 ppt_probe(device_t dev) 126 { 127 int bus, slot, func; 128 struct pci_devinfo *dinfo; 129 130 dinfo = (struct pci_devinfo *)device_get_ivars(dev); 131 132 bus = pci_get_bus(dev); 133 slot = pci_get_slot(dev); 134 func = pci_get_function(dev); 135 136 /* 137 * To qualify as a pci passthrough device a device must: 138 * - be allowed by administrator to be used in this role 139 * - be an endpoint device 140 */ 141 if ((dinfo->cfg.hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL) 142 return (ENXIO); 143 else if (vmm_is_pptdev(bus, slot, func)) 144 return (0); 145 else 146 /* 147 * Returning BUS_PROBE_NOWILDCARD here matches devices that the 148 * SR-IOV infrastructure specified as "ppt" passthrough devices. 149 * All normal devices that did not have "ppt" specified as their 150 * driver will not be matched by this. 151 */ 152 return (BUS_PROBE_NOWILDCARD); 153 } 154 155 static int 156 ppt_attach(device_t dev) 157 { 158 struct pptdev *ppt; 159 160 ppt = device_get_softc(dev); 161 162 iommu_remove_device(iommu_host_domain(), pci_get_rid(dev)); 163 num_pptdevs++; 164 TAILQ_INSERT_TAIL(&pptdev_list, ppt, next); 165 ppt->dev = dev; 166 167 if (bootverbose) 168 device_printf(dev, "attached\n"); 169 170 return (0); 171 } 172 173 static int 174 ppt_detach(device_t dev) 175 { 176 struct pptdev *ppt; 177 178 ppt = device_get_softc(dev); 179 180 if (ppt->vm != NULL) 181 return (EBUSY); 182 num_pptdevs--; 183 TAILQ_REMOVE(&pptdev_list, ppt, next); 184 pci_disable_busmaster(dev); 185 iommu_add_device(iommu_host_domain(), pci_get_rid(dev)); 186 187 return (0); 188 } 189 190 static device_method_t ppt_methods[] = { 191 /* Device interface */ 192 DEVMETHOD(device_probe, ppt_probe), 193 DEVMETHOD(device_attach, ppt_attach), 194 DEVMETHOD(device_detach, ppt_detach), 195 {0, 0} 196 }; 197 198 DEFINE_CLASS_0(ppt, ppt_driver, ppt_methods, sizeof(struct pptdev)); 199 DRIVER_MODULE(ppt, pci, ppt_driver, NULL, NULL); 200 201 static int 202 ppt_find(struct vm *vm, int bus, int slot, int func, struct pptdev **pptp) 203 { 204 device_t dev; 205 struct pptdev *ppt; 206 int b, s, f; 207 208 TAILQ_FOREACH(ppt, &pptdev_list, next) { 209 dev = ppt->dev; 210 b = pci_get_bus(dev); 211 s = pci_get_slot(dev); 212 f = pci_get_function(dev); 213 if (bus == b && slot == s && func == f) 214 break; 215 } 216 217 if (ppt == NULL) 218 return (ENOENT); 219 if (ppt->vm != vm) /* Make sure we own this device */ 220 return (EBUSY); 221 *pptp = ppt; 222 return (0); 223 } 224 225 static void 226 ppt_unmap_all_mmio(struct vm *vm, struct pptdev *ppt) 227 { 228 int i; 229 struct pptseg *seg; 230 231 for (i = 0; i < MAX_MMIOSEGS; i++) { 232 seg = &ppt->mmio[i]; 233 if (seg->len == 0) 234 continue; 235 (void)vm_unmap_mmio(vm, seg->gpa, seg->len); 236 bzero(seg, sizeof(struct pptseg)); 237 } 238 } 239 240 static void 241 ppt_teardown_msi(struct pptdev *ppt) 242 { 243 int i, rid; 244 void *cookie; 245 struct resource *res; 246 247 if (ppt->msi.num_msgs == 0) 248 return; 249 250 for (i = 0; i < ppt->msi.num_msgs; i++) { 251 rid = ppt->msi.startrid + i; 252 res = ppt->msi.res[i]; 253 cookie = ppt->msi.cookie[i]; 254 255 if (cookie != NULL) 256 bus_teardown_intr(ppt->dev, res, cookie); 257 258 if (res != NULL) 259 bus_release_resource(ppt->dev, SYS_RES_IRQ, rid, res); 260 261 ppt->msi.res[i] = NULL; 262 ppt->msi.cookie[i] = NULL; 263 } 264 265 if (ppt->msi.startrid == 1) 266 pci_release_msi(ppt->dev); 267 268 ppt->msi.num_msgs = 0; 269 } 270 271 static void 272 ppt_teardown_msix_intr(struct pptdev *ppt, int idx) 273 { 274 int rid; 275 struct resource *res; 276 void *cookie; 277 278 rid = ppt->msix.startrid + idx; 279 res = ppt->msix.res[idx]; 280 cookie = ppt->msix.cookie[idx]; 281 282 if (cookie != NULL) 283 bus_teardown_intr(ppt->dev, res, cookie); 284 285 if (res != NULL) 286 bus_release_resource(ppt->dev, SYS_RES_IRQ, rid, res); 287 288 ppt->msix.res[idx] = NULL; 289 ppt->msix.cookie[idx] = NULL; 290 } 291 292 static void 293 ppt_teardown_msix(struct pptdev *ppt) 294 { 295 int i; 296 297 if (ppt->msix.num_msgs == 0) 298 return; 299 300 for (i = 0; i < ppt->msix.num_msgs; i++) 301 ppt_teardown_msix_intr(ppt, i); 302 303 free(ppt->msix.res, M_PPTMSIX); 304 free(ppt->msix.cookie, M_PPTMSIX); 305 free(ppt->msix.arg, M_PPTMSIX); 306 307 pci_release_msi(ppt->dev); 308 309 if (ppt->msix.msix_table_res) { 310 bus_release_resource(ppt->dev, SYS_RES_MEMORY, 311 ppt->msix.msix_table_rid, 312 ppt->msix.msix_table_res); 313 ppt->msix.msix_table_res = NULL; 314 ppt->msix.msix_table_rid = 0; 315 } 316 if (ppt->msix.msix_pba_res) { 317 bus_release_resource(ppt->dev, SYS_RES_MEMORY, 318 ppt->msix.msix_pba_rid, 319 ppt->msix.msix_pba_res); 320 ppt->msix.msix_pba_res = NULL; 321 ppt->msix.msix_pba_rid = 0; 322 } 323 324 ppt->msix.num_msgs = 0; 325 } 326 327 int 328 ppt_avail_devices(void) 329 { 330 331 return (num_pptdevs); 332 } 333 334 int 335 ppt_assigned_devices(struct vm *vm) 336 { 337 struct pptdev *ppt; 338 int num; 339 340 num = 0; 341 TAILQ_FOREACH(ppt, &pptdev_list, next) { 342 if (ppt->vm == vm) 343 num++; 344 } 345 return (num); 346 } 347 348 bool 349 ppt_is_mmio(struct vm *vm, vm_paddr_t gpa) 350 { 351 int i; 352 struct pptdev *ppt; 353 struct pptseg *seg; 354 355 TAILQ_FOREACH(ppt, &pptdev_list, next) { 356 if (ppt->vm != vm) 357 continue; 358 359 for (i = 0; i < MAX_MMIOSEGS; i++) { 360 seg = &ppt->mmio[i]; 361 if (seg->len == 0) 362 continue; 363 if (gpa >= seg->gpa && gpa < seg->gpa + seg->len) 364 return (true); 365 } 366 } 367 368 return (false); 369 } 370 371 static void 372 ppt_pci_reset(device_t dev) 373 { 374 375 if (pcie_flr(dev, 376 max(pcie_get_max_completion_timeout(dev) / 1000, 10), true)) 377 return; 378 379 pci_power_reset(dev); 380 } 381 382 int 383 ppt_assign_device(struct vm *vm, int bus, int slot, int func) 384 { 385 struct pptdev *ppt; 386 int error; 387 388 /* Passing NULL requires the device to be unowned. */ 389 error = ppt_find(NULL, bus, slot, func, &ppt); 390 if (error) 391 return (error); 392 393 pci_save_state(ppt->dev); 394 ppt_pci_reset(ppt->dev); 395 pci_restore_state(ppt->dev); 396 ppt->vm = vm; 397 iommu_add_device(vm_iommu_domain(vm), pci_get_rid(ppt->dev)); 398 return (0); 399 } 400 401 int 402 ppt_unassign_device(struct vm *vm, int bus, int slot, int func) 403 { 404 struct pptdev *ppt; 405 int error; 406 407 error = ppt_find(vm, bus, slot, func, &ppt); 408 if (error) 409 return (error); 410 411 pci_save_state(ppt->dev); 412 ppt_pci_reset(ppt->dev); 413 pci_restore_state(ppt->dev); 414 ppt_unmap_all_mmio(vm, ppt); 415 ppt_teardown_msi(ppt); 416 ppt_teardown_msix(ppt); 417 iommu_remove_device(vm_iommu_domain(vm), pci_get_rid(ppt->dev)); 418 ppt->vm = NULL; 419 return (0); 420 } 421 422 int 423 ppt_unassign_all(struct vm *vm) 424 { 425 struct pptdev *ppt; 426 int bus, slot, func; 427 device_t dev; 428 429 TAILQ_FOREACH(ppt, &pptdev_list, next) { 430 if (ppt->vm == vm) { 431 dev = ppt->dev; 432 bus = pci_get_bus(dev); 433 slot = pci_get_slot(dev); 434 func = pci_get_function(dev); 435 vm_unassign_pptdev(vm, bus, slot, func); 436 } 437 } 438 439 return (0); 440 } 441 442 static bool 443 ppt_valid_bar_mapping(struct pptdev *ppt, vm_paddr_t hpa, size_t len) 444 { 445 struct pci_map *pm; 446 pci_addr_t base, size; 447 448 for (pm = pci_first_bar(ppt->dev); pm != NULL; pm = pci_next_bar(pm)) { 449 if (!PCI_BAR_MEM(pm->pm_value)) 450 continue; 451 base = pm->pm_value & PCIM_BAR_MEM_BASE; 452 size = (pci_addr_t)1 << pm->pm_size; 453 if (hpa >= base && hpa + len <= base + size) 454 return (true); 455 } 456 return (false); 457 } 458 459 int 460 ppt_map_mmio(struct vm *vm, int bus, int slot, int func, 461 vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 462 { 463 int i, error; 464 struct pptseg *seg; 465 struct pptdev *ppt; 466 467 if (len % PAGE_SIZE != 0 || len == 0 || gpa % PAGE_SIZE != 0 || 468 hpa % PAGE_SIZE != 0 || gpa + len < gpa || hpa + len < hpa) 469 return (EINVAL); 470 471 error = ppt_find(vm, bus, slot, func, &ppt); 472 if (error) 473 return (error); 474 475 if (!ppt_valid_bar_mapping(ppt, hpa, len)) 476 return (EINVAL); 477 478 for (i = 0; i < MAX_MMIOSEGS; i++) { 479 seg = &ppt->mmio[i]; 480 if (seg->len == 0) { 481 error = vm_map_mmio(vm, gpa, len, hpa); 482 if (error == 0) { 483 seg->gpa = gpa; 484 seg->len = len; 485 } 486 return (error); 487 } 488 } 489 return (ENOSPC); 490 } 491 492 int 493 ppt_unmap_mmio(struct vm *vm, int bus, int slot, int func, 494 vm_paddr_t gpa, size_t len) 495 { 496 int i, error; 497 struct pptseg *seg; 498 struct pptdev *ppt; 499 500 error = ppt_find(vm, bus, slot, func, &ppt); 501 if (error) 502 return (error); 503 504 for (i = 0; i < MAX_MMIOSEGS; i++) { 505 seg = &ppt->mmio[i]; 506 if (seg->gpa == gpa && seg->len == len) { 507 error = vm_unmap_mmio(vm, seg->gpa, seg->len); 508 if (error == 0) { 509 seg->gpa = 0; 510 seg->len = 0; 511 } 512 return (error); 513 } 514 } 515 return (ENOENT); 516 } 517 518 static int 519 pptintr(void *arg) 520 { 521 struct pptdev *ppt; 522 struct pptintr_arg *pptarg; 523 524 pptarg = arg; 525 ppt = pptarg->pptdev; 526 527 if (ppt->vm != NULL) 528 lapic_intr_msi(ppt->vm, pptarg->addr, pptarg->msg_data); 529 else { 530 /* 531 * XXX 532 * This is not expected to happen - panic? 533 */ 534 } 535 536 /* 537 * For legacy interrupts give other filters a chance in case 538 * the interrupt was not generated by the passthrough device. 539 */ 540 if (ppt->msi.startrid == 0) 541 return (FILTER_STRAY); 542 else 543 return (FILTER_HANDLED); 544 } 545 546 int 547 ppt_setup_msi(struct vm *vm, int vcpu, int bus, int slot, int func, 548 uint64_t addr, uint64_t msg, int numvec) 549 { 550 int i, rid, flags; 551 int msi_count, startrid, error, tmp; 552 struct pptdev *ppt; 553 554 if (numvec < 0 || numvec > MAX_MSIMSGS) 555 return (EINVAL); 556 557 error = ppt_find(vm, bus, slot, func, &ppt); 558 if (error) 559 return (error); 560 561 /* Reject attempts to enable MSI while MSI-X is active. */ 562 if (ppt->msix.num_msgs != 0 && numvec != 0) 563 return (EBUSY); 564 565 /* Free any allocated resources */ 566 ppt_teardown_msi(ppt); 567 568 if (numvec == 0) /* nothing more to do */ 569 return (0); 570 571 flags = RF_ACTIVE; 572 msi_count = pci_msi_count(ppt->dev); 573 if (msi_count == 0) { 574 startrid = 0; /* legacy interrupt */ 575 msi_count = 1; 576 flags |= RF_SHAREABLE; 577 } else 578 startrid = 1; /* MSI */ 579 580 /* 581 * The device must be capable of supporting the number of vectors 582 * the guest wants to allocate. 583 */ 584 if (numvec > msi_count) 585 return (EINVAL); 586 587 /* 588 * Make sure that we can allocate all the MSI vectors that are needed 589 * by the guest. 590 */ 591 if (startrid == 1) { 592 tmp = numvec; 593 error = pci_alloc_msi(ppt->dev, &tmp); 594 if (error) 595 return (error); 596 else if (tmp != numvec) { 597 pci_release_msi(ppt->dev); 598 return (ENOSPC); 599 } else { 600 /* success */ 601 } 602 } 603 604 ppt->msi.startrid = startrid; 605 606 /* 607 * Allocate the irq resource and attach it to the interrupt handler. 608 */ 609 for (i = 0; i < numvec; i++) { 610 ppt->msi.num_msgs = i + 1; 611 ppt->msi.cookie[i] = NULL; 612 613 rid = startrid + i; 614 ppt->msi.res[i] = bus_alloc_resource_any(ppt->dev, SYS_RES_IRQ, 615 &rid, flags); 616 if (ppt->msi.res[i] == NULL) 617 break; 618 619 ppt->msi.arg[i].pptdev = ppt; 620 ppt->msi.arg[i].addr = addr; 621 ppt->msi.arg[i].msg_data = msg + i; 622 623 error = bus_setup_intr(ppt->dev, ppt->msi.res[i], 624 INTR_TYPE_NET | INTR_MPSAFE, 625 pptintr, NULL, &ppt->msi.arg[i], 626 &ppt->msi.cookie[i]); 627 if (error != 0) 628 break; 629 } 630 631 if (i < numvec) { 632 ppt_teardown_msi(ppt); 633 return (ENXIO); 634 } 635 636 return (0); 637 } 638 639 int 640 ppt_setup_msix(struct vm *vm, int vcpu, int bus, int slot, int func, 641 int idx, uint64_t addr, uint64_t msg, uint32_t vector_control) 642 { 643 struct pptdev *ppt; 644 struct pci_devinfo *dinfo; 645 int numvec, alloced, rid, error; 646 size_t res_size, cookie_size, arg_size; 647 648 error = ppt_find(vm, bus, slot, func, &ppt); 649 if (error) 650 return (error); 651 652 /* Reject attempts to enable MSI-X while MSI is active. */ 653 if (ppt->msi.num_msgs != 0) 654 return (EBUSY); 655 656 dinfo = device_get_ivars(ppt->dev); 657 if (!dinfo) 658 return (ENXIO); 659 660 /* 661 * First-time configuration: 662 * Allocate the MSI-X table 663 * Allocate the IRQ resources 664 * Set up some variables in ppt->msix 665 */ 666 if (ppt->msix.num_msgs == 0) { 667 numvec = pci_msix_count(ppt->dev); 668 if (numvec <= 0) 669 return (EINVAL); 670 671 ppt->msix.startrid = 1; 672 ppt->msix.num_msgs = numvec; 673 674 res_size = numvec * sizeof(ppt->msix.res[0]); 675 cookie_size = numvec * sizeof(ppt->msix.cookie[0]); 676 arg_size = numvec * sizeof(ppt->msix.arg[0]); 677 678 ppt->msix.res = malloc(res_size, M_PPTMSIX, M_WAITOK | M_ZERO); 679 ppt->msix.cookie = malloc(cookie_size, M_PPTMSIX, 680 M_WAITOK | M_ZERO); 681 ppt->msix.arg = malloc(arg_size, M_PPTMSIX, M_WAITOK | M_ZERO); 682 683 rid = dinfo->cfg.msix.msix_table_bar; 684 ppt->msix.msix_table_res = bus_alloc_resource_any(ppt->dev, 685 SYS_RES_MEMORY, &rid, RF_ACTIVE); 686 687 if (ppt->msix.msix_table_res == NULL) { 688 ppt_teardown_msix(ppt); 689 return (ENOSPC); 690 } 691 ppt->msix.msix_table_rid = rid; 692 693 if (dinfo->cfg.msix.msix_table_bar != 694 dinfo->cfg.msix.msix_pba_bar) { 695 rid = dinfo->cfg.msix.msix_pba_bar; 696 ppt->msix.msix_pba_res = bus_alloc_resource_any( 697 ppt->dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 698 699 if (ppt->msix.msix_pba_res == NULL) { 700 ppt_teardown_msix(ppt); 701 return (ENOSPC); 702 } 703 ppt->msix.msix_pba_rid = rid; 704 } 705 706 alloced = numvec; 707 error = pci_alloc_msix(ppt->dev, &alloced); 708 if (error || alloced != numvec) { 709 ppt_teardown_msix(ppt); 710 return (error == 0 ? ENOSPC: error); 711 } 712 } 713 714 if ((vector_control & PCIM_MSIX_VCTRL_MASK) == 0) { 715 /* Tear down the IRQ if it's already set up */ 716 ppt_teardown_msix_intr(ppt, idx); 717 718 /* Allocate the IRQ resource */ 719 ppt->msix.cookie[idx] = NULL; 720 rid = ppt->msix.startrid + idx; 721 ppt->msix.res[idx] = bus_alloc_resource_any(ppt->dev, SYS_RES_IRQ, 722 &rid, RF_ACTIVE); 723 if (ppt->msix.res[idx] == NULL) 724 return (ENXIO); 725 726 ppt->msix.arg[idx].pptdev = ppt; 727 ppt->msix.arg[idx].addr = addr; 728 ppt->msix.arg[idx].msg_data = msg; 729 730 /* Setup the MSI-X interrupt */ 731 error = bus_setup_intr(ppt->dev, ppt->msix.res[idx], 732 INTR_TYPE_NET | INTR_MPSAFE, 733 pptintr, NULL, &ppt->msix.arg[idx], 734 &ppt->msix.cookie[idx]); 735 736 if (error != 0) { 737 bus_release_resource(ppt->dev, SYS_RES_IRQ, rid, ppt->msix.res[idx]); 738 ppt->msix.cookie[idx] = NULL; 739 ppt->msix.res[idx] = NULL; 740 return (ENXIO); 741 } 742 } else { 743 /* Masked, tear it down if it's already been set up */ 744 ppt_teardown_msix_intr(ppt, idx); 745 } 746 747 return (0); 748 } 749 750 int 751 ppt_disable_msix(struct vm *vm, int bus, int slot, int func) 752 { 753 struct pptdev *ppt; 754 int error; 755 756 error = ppt_find(vm, bus, slot, func, &ppt); 757 if (error) 758 return (error); 759 760 ppt_teardown_msix(ppt); 761 return (0); 762 } 763