Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/amd64/vmm/io/ppt.c
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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); 185 186 if (iommu_host_domain() != NULL) 187 iommu_add_device(iommu_host_domain(), pci_get_rid(dev)); 188 189 return (0); 190 } 191 192 static device_method_t ppt_methods[] = { 193 /* Device interface */ 194 DEVMETHOD(device_probe, ppt_probe), 195 DEVMETHOD(device_attach, ppt_attach), 196 DEVMETHOD(device_detach, ppt_detach), 197 {0, 0} 198 }; 199 200 DEFINE_CLASS_0(ppt, ppt_driver, ppt_methods, sizeof(struct pptdev)); 201 DRIVER_MODULE(ppt, pci, ppt_driver, NULL, NULL); 202 203 static int 204 ppt_find(struct vm *vm, int bus, int slot, int func, struct pptdev **pptp) 205 { 206 device_t dev; 207 struct pptdev *ppt; 208 int b, s, f; 209 210 TAILQ_FOREACH(ppt, &pptdev_list, next) { 211 dev = ppt->dev; 212 b = pci_get_bus(dev); 213 s = pci_get_slot(dev); 214 f = pci_get_function(dev); 215 if (bus == b && slot == s && func == f) 216 break; 217 } 218 219 if (ppt == NULL) 220 return (ENOENT); 221 if (ppt->vm != vm) /* Make sure we own this device */ 222 return (EBUSY); 223 *pptp = ppt; 224 return (0); 225 } 226 227 static void 228 ppt_unmap_all_mmio(struct vm *vm, struct pptdev *ppt) 229 { 230 int i; 231 struct pptseg *seg; 232 233 for (i = 0; i < MAX_MMIOSEGS; i++) { 234 seg = &ppt->mmio[i]; 235 if (seg->len == 0) 236 continue; 237 (void)vm_unmap_mmio(vm, seg->gpa, seg->len); 238 bzero(seg, sizeof(struct pptseg)); 239 } 240 } 241 242 static void 243 ppt_teardown_msi(struct pptdev *ppt) 244 { 245 int i, rid; 246 void *cookie; 247 struct resource *res; 248 249 if (ppt->msi.num_msgs == 0) 250 return; 251 252 for (i = 0; i < ppt->msi.num_msgs; i++) { 253 rid = ppt->msi.startrid + i; 254 res = ppt->msi.res[i]; 255 cookie = ppt->msi.cookie[i]; 256 257 if (cookie != NULL) 258 bus_teardown_intr(ppt->dev, res, cookie); 259 260 if (res != NULL) 261 bus_release_resource(ppt->dev, SYS_RES_IRQ, rid, res); 262 263 ppt->msi.res[i] = NULL; 264 ppt->msi.cookie[i] = NULL; 265 } 266 267 if (ppt->msi.startrid == 1) 268 pci_release_msi(ppt->dev); 269 270 ppt->msi.num_msgs = 0; 271 } 272 273 static void 274 ppt_teardown_msix_intr(struct pptdev *ppt, int idx) 275 { 276 int rid; 277 struct resource *res; 278 void *cookie; 279 280 rid = ppt->msix.startrid + idx; 281 res = ppt->msix.res[idx]; 282 cookie = ppt->msix.cookie[idx]; 283 284 if (cookie != NULL) 285 bus_teardown_intr(ppt->dev, res, cookie); 286 287 if (res != NULL) 288 bus_release_resource(ppt->dev, SYS_RES_IRQ, rid, res); 289 290 ppt->msix.res[idx] = NULL; 291 ppt->msix.cookie[idx] = NULL; 292 } 293 294 static void 295 ppt_teardown_msix(struct pptdev *ppt) 296 { 297 int i; 298 299 if (ppt->msix.num_msgs == 0) 300 return; 301 302 for (i = 0; i < ppt->msix.num_msgs; i++) 303 ppt_teardown_msix_intr(ppt, i); 304 305 free(ppt->msix.res, M_PPTMSIX); 306 free(ppt->msix.cookie, M_PPTMSIX); 307 free(ppt->msix.arg, M_PPTMSIX); 308 309 pci_release_msi(ppt->dev); 310 311 if (ppt->msix.msix_table_res) { 312 bus_release_resource(ppt->dev, SYS_RES_MEMORY, 313 ppt->msix.msix_table_rid, 314 ppt->msix.msix_table_res); 315 ppt->msix.msix_table_res = NULL; 316 ppt->msix.msix_table_rid = 0; 317 } 318 if (ppt->msix.msix_pba_res) { 319 bus_release_resource(ppt->dev, SYS_RES_MEMORY, 320 ppt->msix.msix_pba_rid, 321 ppt->msix.msix_pba_res); 322 ppt->msix.msix_pba_res = NULL; 323 ppt->msix.msix_pba_rid = 0; 324 } 325 326 ppt->msix.num_msgs = 0; 327 } 328 329 int 330 ppt_avail_devices(void) 331 { 332 333 return (num_pptdevs); 334 } 335 336 int 337 ppt_assigned_devices(struct vm *vm) 338 { 339 struct pptdev *ppt; 340 int num; 341 342 num = 0; 343 TAILQ_FOREACH(ppt, &pptdev_list, next) { 344 if (ppt->vm == vm) 345 num++; 346 } 347 return (num); 348 } 349 350 bool 351 ppt_is_mmio(struct vm *vm, vm_paddr_t gpa) 352 { 353 int i; 354 struct pptdev *ppt; 355 struct pptseg *seg; 356 357 TAILQ_FOREACH(ppt, &pptdev_list, next) { 358 if (ppt->vm != vm) 359 continue; 360 361 for (i = 0; i < MAX_MMIOSEGS; i++) { 362 seg = &ppt->mmio[i]; 363 if (seg->len == 0) 364 continue; 365 if (gpa >= seg->gpa && gpa < seg->gpa + seg->len) 366 return (true); 367 } 368 } 369 370 return (false); 371 } 372 373 static void 374 ppt_pci_reset(device_t dev) 375 { 376 377 if (pcie_flr(dev, 378 max(pcie_get_max_completion_timeout(dev) / 1000, 10), true)) 379 return; 380 381 pci_power_reset(dev); 382 } 383 384 int 385 ppt_assign_device(struct vm *vm, int bus, int slot, int func) 386 { 387 struct pptdev *ppt; 388 int error; 389 390 /* Passing NULL requires the device to be unowned. */ 391 error = ppt_find(NULL, bus, slot, func, &ppt); 392 if (error) 393 return (error); 394 395 pci_save_state(ppt->dev); 396 ppt_pci_reset(ppt->dev); 397 pci_restore_state(ppt->dev); 398 ppt->vm = vm; 399 iommu_add_device(vm_iommu_domain(vm), pci_get_rid(ppt->dev)); 400 return (0); 401 } 402 403 int 404 ppt_unassign_device(struct vm *vm, int bus, int slot, int func) 405 { 406 struct pptdev *ppt; 407 int error; 408 409 error = ppt_find(vm, bus, slot, func, &ppt); 410 if (error) 411 return (error); 412 413 pci_save_state(ppt->dev); 414 ppt_pci_reset(ppt->dev); 415 pci_restore_state(ppt->dev); 416 ppt_unmap_all_mmio(vm, ppt); 417 ppt_teardown_msi(ppt); 418 ppt_teardown_msix(ppt); 419 iommu_remove_device(vm_iommu_domain(vm), pci_get_rid(ppt->dev)); 420 ppt->vm = NULL; 421 return (0); 422 } 423 424 int 425 ppt_unassign_all(struct vm *vm) 426 { 427 struct pptdev *ppt; 428 int bus, slot, func; 429 device_t dev; 430 431 TAILQ_FOREACH(ppt, &pptdev_list, next) { 432 if (ppt->vm == vm) { 433 dev = ppt->dev; 434 bus = pci_get_bus(dev); 435 slot = pci_get_slot(dev); 436 func = pci_get_function(dev); 437 vm_unassign_pptdev(vm, bus, slot, func); 438 } 439 } 440 441 return (0); 442 } 443 444 static bool 445 ppt_valid_bar_mapping(struct pptdev *ppt, vm_paddr_t hpa, size_t len) 446 { 447 struct pci_map *pm; 448 pci_addr_t base, size; 449 450 for (pm = pci_first_bar(ppt->dev); pm != NULL; pm = pci_next_bar(pm)) { 451 if (!PCI_BAR_MEM(pm->pm_value)) 452 continue; 453 base = pm->pm_value & PCIM_BAR_MEM_BASE; 454 size = (pci_addr_t)1 << pm->pm_size; 455 if (hpa >= base && hpa + len <= base + size) 456 return (true); 457 } 458 return (false); 459 } 460 461 int 462 ppt_map_mmio(struct vm *vm, int bus, int slot, int func, 463 vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 464 { 465 int i, error; 466 struct pptseg *seg; 467 struct pptdev *ppt; 468 469 if (len % PAGE_SIZE != 0 || len == 0 || gpa % PAGE_SIZE != 0 || 470 hpa % PAGE_SIZE != 0 || gpa + len < gpa || hpa + len < hpa) 471 return (EINVAL); 472 473 error = ppt_find(vm, bus, slot, func, &ppt); 474 if (error) 475 return (error); 476 477 if (!ppt_valid_bar_mapping(ppt, hpa, len)) 478 return (EINVAL); 479 480 for (i = 0; i < MAX_MMIOSEGS; i++) { 481 seg = &ppt->mmio[i]; 482 if (seg->len == 0) { 483 error = vm_map_mmio(vm, gpa, len, hpa); 484 if (error == 0) { 485 seg->gpa = gpa; 486 seg->len = len; 487 } 488 return (error); 489 } 490 } 491 return (ENOSPC); 492 } 493 494 int 495 ppt_unmap_mmio(struct vm *vm, int bus, int slot, int func, 496 vm_paddr_t gpa, size_t len) 497 { 498 int i, error; 499 struct pptseg *seg; 500 struct pptdev *ppt; 501 502 error = ppt_find(vm, bus, slot, func, &ppt); 503 if (error) 504 return (error); 505 506 for (i = 0; i < MAX_MMIOSEGS; i++) { 507 seg = &ppt->mmio[i]; 508 if (seg->gpa == gpa && seg->len == len) { 509 error = vm_unmap_mmio(vm, seg->gpa, seg->len); 510 if (error == 0) { 511 seg->gpa = 0; 512 seg->len = 0; 513 } 514 return (error); 515 } 516 } 517 return (ENOENT); 518 } 519 520 static int 521 pptintr(void *arg) 522 { 523 struct pptdev *ppt; 524 struct pptintr_arg *pptarg; 525 526 pptarg = arg; 527 ppt = pptarg->pptdev; 528 529 if (ppt->vm != NULL) 530 lapic_intr_msi(ppt->vm, pptarg->addr, pptarg->msg_data); 531 else { 532 /* 533 * XXX 534 * This is not expected to happen - panic? 535 */ 536 } 537 538 /* 539 * For legacy interrupts give other filters a chance in case 540 * the interrupt was not generated by the passthrough device. 541 */ 542 if (ppt->msi.startrid == 0) 543 return (FILTER_STRAY); 544 else 545 return (FILTER_HANDLED); 546 } 547 548 int 549 ppt_setup_msi(struct vm *vm, int bus, int slot, int func, 550 uint64_t addr, uint64_t msg, int numvec) 551 { 552 int i, rid, flags; 553 int msi_count, startrid, error, tmp; 554 struct pptdev *ppt; 555 556 if (numvec < 0 || numvec > MAX_MSIMSGS) 557 return (EINVAL); 558 559 error = ppt_find(vm, bus, slot, func, &ppt); 560 if (error) 561 return (error); 562 563 /* Reject attempts to enable MSI while MSI-X is active. */ 564 if (ppt->msix.num_msgs != 0 && numvec != 0) 565 return (EBUSY); 566 567 /* Free any allocated resources */ 568 ppt_teardown_msi(ppt); 569 570 if (numvec == 0) /* nothing more to do */ 571 return (0); 572 573 flags = RF_ACTIVE; 574 msi_count = pci_msi_count(ppt->dev); 575 if (msi_count == 0) { 576 startrid = 0; /* legacy interrupt */ 577 msi_count = 1; 578 flags |= RF_SHAREABLE; 579 } else 580 startrid = 1; /* MSI */ 581 582 /* 583 * The device must be capable of supporting the number of vectors 584 * the guest wants to allocate. 585 */ 586 if (numvec > msi_count) 587 return (EINVAL); 588 589 /* 590 * Make sure that we can allocate all the MSI vectors that are needed 591 * by the guest. 592 */ 593 if (startrid == 1) { 594 tmp = numvec; 595 error = pci_alloc_msi(ppt->dev, &tmp); 596 if (error) 597 return (error); 598 else if (tmp != numvec) { 599 pci_release_msi(ppt->dev); 600 return (ENOSPC); 601 } else { 602 /* success */ 603 } 604 } 605 606 ppt->msi.startrid = startrid; 607 608 /* 609 * Allocate the irq resource and attach it to the interrupt handler. 610 */ 611 for (i = 0; i < numvec; i++) { 612 ppt->msi.num_msgs = i + 1; 613 ppt->msi.cookie[i] = NULL; 614 615 rid = startrid + i; 616 ppt->msi.res[i] = bus_alloc_resource_any(ppt->dev, SYS_RES_IRQ, 617 &rid, flags); 618 if (ppt->msi.res[i] == NULL) 619 break; 620 621 ppt->msi.arg[i].pptdev = ppt; 622 ppt->msi.arg[i].addr = addr; 623 ppt->msi.arg[i].msg_data = msg + i; 624 625 error = bus_setup_intr(ppt->dev, ppt->msi.res[i], 626 INTR_TYPE_NET | INTR_MPSAFE, 627 pptintr, NULL, &ppt->msi.arg[i], 628 &ppt->msi.cookie[i]); 629 if (error != 0) 630 break; 631 } 632 633 if (i < numvec) { 634 ppt_teardown_msi(ppt); 635 return (ENXIO); 636 } 637 638 return (0); 639 } 640 641 int 642 ppt_setup_msix(struct vm *vm, int bus, int slot, int func, 643 int idx, uint64_t addr, uint64_t msg, uint32_t vector_control) 644 { 645 struct pptdev *ppt; 646 struct pci_devinfo *dinfo; 647 int numvec, alloced, rid, error; 648 size_t res_size, cookie_size, arg_size; 649 650 error = ppt_find(vm, bus, slot, func, &ppt); 651 if (error) 652 return (error); 653 654 /* Reject attempts to enable MSI-X while MSI is active. */ 655 if (ppt->msi.num_msgs != 0) 656 return (EBUSY); 657 658 dinfo = device_get_ivars(ppt->dev); 659 if (!dinfo) 660 return (ENXIO); 661 662 /* 663 * First-time configuration: 664 * Allocate the MSI-X table 665 * Allocate the IRQ resources 666 * Set up some variables in ppt->msix 667 */ 668 if (ppt->msix.num_msgs == 0) { 669 numvec = pci_msix_count(ppt->dev); 670 if (numvec <= 0) 671 return (EINVAL); 672 673 ppt->msix.startrid = 1; 674 ppt->msix.num_msgs = numvec; 675 676 res_size = numvec * sizeof(ppt->msix.res[0]); 677 cookie_size = numvec * sizeof(ppt->msix.cookie[0]); 678 arg_size = numvec * sizeof(ppt->msix.arg[0]); 679 680 ppt->msix.res = malloc(res_size, M_PPTMSIX, M_WAITOK | M_ZERO); 681 ppt->msix.cookie = malloc(cookie_size, M_PPTMSIX, 682 M_WAITOK | M_ZERO); 683 ppt->msix.arg = malloc(arg_size, M_PPTMSIX, M_WAITOK | M_ZERO); 684 685 rid = dinfo->cfg.msix.msix_table_bar; 686 ppt->msix.msix_table_res = bus_alloc_resource_any(ppt->dev, 687 SYS_RES_MEMORY, &rid, RF_ACTIVE); 688 689 if (ppt->msix.msix_table_res == NULL) { 690 ppt_teardown_msix(ppt); 691 return (ENOSPC); 692 } 693 ppt->msix.msix_table_rid = rid; 694 695 if (dinfo->cfg.msix.msix_table_bar != 696 dinfo->cfg.msix.msix_pba_bar) { 697 rid = dinfo->cfg.msix.msix_pba_bar; 698 ppt->msix.msix_pba_res = bus_alloc_resource_any( 699 ppt->dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 700 701 if (ppt->msix.msix_pba_res == NULL) { 702 ppt_teardown_msix(ppt); 703 return (ENOSPC); 704 } 705 ppt->msix.msix_pba_rid = rid; 706 } 707 708 alloced = numvec; 709 error = pci_alloc_msix(ppt->dev, &alloced); 710 if (error || alloced != numvec) { 711 ppt_teardown_msix(ppt); 712 return (error == 0 ? ENOSPC: error); 713 } 714 } 715 716 if ((vector_control & PCIM_MSIX_VCTRL_MASK) == 0) { 717 /* Tear down the IRQ if it's already set up */ 718 ppt_teardown_msix_intr(ppt, idx); 719 720 /* Allocate the IRQ resource */ 721 ppt->msix.cookie[idx] = NULL; 722 rid = ppt->msix.startrid + idx; 723 ppt->msix.res[idx] = bus_alloc_resource_any(ppt->dev, SYS_RES_IRQ, 724 &rid, RF_ACTIVE); 725 if (ppt->msix.res[idx] == NULL) 726 return (ENXIO); 727 728 ppt->msix.arg[idx].pptdev = ppt; 729 ppt->msix.arg[idx].addr = addr; 730 ppt->msix.arg[idx].msg_data = msg; 731 732 /* Setup the MSI-X interrupt */ 733 error = bus_setup_intr(ppt->dev, ppt->msix.res[idx], 734 INTR_TYPE_NET | INTR_MPSAFE, 735 pptintr, NULL, &ppt->msix.arg[idx], 736 &ppt->msix.cookie[idx]); 737 738 if (error != 0) { 739 bus_release_resource(ppt->dev, SYS_RES_IRQ, rid, ppt->msix.res[idx]); 740 ppt->msix.cookie[idx] = NULL; 741 ppt->msix.res[idx] = NULL; 742 return (ENXIO); 743 } 744 } else { 745 /* Masked, tear it down if it's already been set up */ 746 ppt_teardown_msix_intr(ppt, idx); 747 } 748 749 return (0); 750 } 751 752 int 753 ppt_disable_msix(struct vm *vm, int bus, int slot, int func) 754 { 755 struct pptdev *ppt; 756 int error; 757 758 error = ppt_find(vm, bus, slot, func, &ppt); 759 if (error) 760 return (error); 761 762 ppt_teardown_msix(ppt); 763 return (0); 764 }
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