| 1 | /* |
| 2 | * VFIO device |
| 3 | * |
| 4 | * Copyright Red Hat, Inc. 2012 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Alex Williamson <alex.williamson@redhat.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 10 | * the COPYING file in the top-level directory. |
| 11 | * |
| 12 | * Based on qemu-kvm device-assignment: |
| 13 | * Adapted for KVM by Qumranet. |
| 14 | * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com) |
| 15 | * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com) |
| 16 | * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com) |
| 17 | * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com) |
| 18 | * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com) |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include <sys/ioctl.h> |
| 23 | |
| 24 | #include "hw/vfio/vfio-device.h" |
| 25 | #include "hw/vfio/pci.h" |
| 26 | #include "hw/core/iommu.h" |
| 27 | #include "trace.h" |
| 28 | #include "qapi/error.h" |
| 29 | #include "qemu/error-report.h" |
| 30 | #include "qemu/units.h" |
| 31 | #include "migration/cpr.h" |
| 32 | #include "migration/blocker.h" |
| 33 | #include "monitor/monitor.h" |
| 34 | #include "vfio-helpers.h" |
| 35 | |
| 36 | VFIODeviceList vfio_device_list = |
| 37 | QLIST_HEAD_INITIALIZER(vfio_device_list); |
| 38 | |
| 39 | /* |
| 40 | * We want to differentiate hot reset of multiple in-use devices vs |
| 41 | * hot reset of a single in-use device. VFIO_DEVICE_RESET will already |
| 42 | * handle the case of doing hot resets when there is only a single |
| 43 | * device per bus. The in-use here refers to how many VFIODevices are |
| 44 | * affected. A hot reset that affects multiple devices, but only a |
| 45 | * single in-use device, means that we can call it from our bus |
| 46 | * ->reset() callback since the extent is effectively a single |
| 47 | * device. This allows us to make use of it in the hotplug path. When |
| 48 | * there are multiple in-use devices, we can only trigger the hot |
| 49 | * reset during a system reset and thus from our reset handler. We |
| 50 | * separate _one vs _multi here so that we don't overlap and do a |
| 51 | * double reset on the system reset path where both our reset handler |
| 52 | * and ->reset() callback are used. Calling _one() will only do a hot |
| 53 | * reset for the one in-use devices case, calling _multi() will do |
| 54 | * nothing if a _one() would have been sufficient. |
| 55 | */ |
| 56 | void vfio_device_reset_handler(void *opaque) |
| 57 | { |
| 58 | VFIODevice *vbasedev; |
| 59 | |
| 60 | trace_vfio_device_reset_handler(); |
| 61 | QLIST_FOREACH(vbasedev, &vfio_device_list, global_next) { |
| 62 | if (qdev_is_realized(vbasedev->dev)) { |
| 63 | vbasedev->ops->vfio_compute_needs_reset(vbasedev); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | QLIST_FOREACH(vbasedev, &vfio_device_list, global_next) { |
| 68 | if (qdev_is_realized(vbasedev->dev) && vbasedev->needs_reset) { |
| 69 | vbasedev->ops->vfio_hot_reset_multi(vbasedev); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | /* |
| 75 | * Common VFIO interrupt disable |
| 76 | */ |
| 77 | void vfio_device_irq_disable(VFIODevice *vbasedev, int index) |
| 78 | { |
| 79 | struct vfio_irq_set irq_set = { |
| 80 | .argsz = sizeof(irq_set), |
| 81 | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER, |
| 82 | .index = index, |
| 83 | .start = 0, |
| 84 | .count = 0, |
| 85 | }; |
| 86 | |
| 87 | vbasedev->io_ops->set_irqs(vbasedev, &irq_set); |
| 88 | } |
| 89 | |
| 90 | void vfio_device_irq_unmask(VFIODevice *vbasedev, int index) |
| 91 | { |
| 92 | struct vfio_irq_set irq_set = { |
| 93 | .argsz = sizeof(irq_set), |
| 94 | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK, |
| 95 | .index = index, |
| 96 | .start = 0, |
| 97 | .count = 1, |
| 98 | }; |
| 99 | |
| 100 | vbasedev->io_ops->set_irqs(vbasedev, &irq_set); |
| 101 | } |
| 102 | |
| 103 | void vfio_device_irq_mask(VFIODevice *vbasedev, int index) |
| 104 | { |
| 105 | struct vfio_irq_set irq_set = { |
| 106 | .argsz = sizeof(irq_set), |
| 107 | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK, |
| 108 | .index = index, |
| 109 | .start = 0, |
| 110 | .count = 1, |
| 111 | }; |
| 112 | |
| 113 | vbasedev->io_ops->set_irqs(vbasedev, &irq_set); |
| 114 | } |
| 115 | |
| 116 | static inline const char *action_to_str(int action) |
| 117 | { |
| 118 | switch (action) { |
| 119 | case VFIO_IRQ_SET_ACTION_MASK: |
| 120 | return "MASK"; |
| 121 | case VFIO_IRQ_SET_ACTION_UNMASK: |
| 122 | return "UNMASK"; |
| 123 | case VFIO_IRQ_SET_ACTION_TRIGGER: |
| 124 | return "TRIGGER"; |
| 125 | default: |
| 126 | return "UNKNOWN ACTION"; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | static const char *index_to_str(VFIODevice *vbasedev, int index) |
| 131 | { |
| 132 | if (!vfio_pci_from_vfio_device(vbasedev)) { |
| 133 | return NULL; |
| 134 | } |
| 135 | |
| 136 | switch (index) { |
| 137 | case VFIO_PCI_INTX_IRQ_INDEX: |
| 138 | return "INTX"; |
| 139 | case VFIO_PCI_MSI_IRQ_INDEX: |
| 140 | return "MSI"; |
| 141 | case VFIO_PCI_MSIX_IRQ_INDEX: |
| 142 | return "MSIX"; |
| 143 | case VFIO_PCI_ERR_IRQ_INDEX: |
| 144 | return "ERR"; |
| 145 | case VFIO_PCI_REQ_IRQ_INDEX: |
| 146 | return "REQ"; |
| 147 | default: |
| 148 | return NULL; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | bool vfio_device_irq_set_signaling(VFIODevice *vbasedev, int index, int subindex, |
| 153 | int action, int fd, Error **errp) |
| 154 | { |
| 155 | ERRP_GUARD(); |
| 156 | g_autofree struct vfio_irq_set *irq_set = NULL; |
| 157 | int argsz; |
| 158 | const char *name; |
| 159 | int32_t *pfd; |
| 160 | |
| 161 | argsz = sizeof(*irq_set) + sizeof(*pfd); |
| 162 | |
| 163 | irq_set = g_malloc0(argsz); |
| 164 | irq_set->argsz = argsz; |
| 165 | irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | action; |
| 166 | irq_set->index = index; |
| 167 | irq_set->start = subindex; |
| 168 | irq_set->count = 1; |
| 169 | pfd = (int32_t *)&irq_set->data; |
| 170 | *pfd = fd; |
| 171 | |
| 172 | if (!vbasedev->io_ops->set_irqs(vbasedev, irq_set)) { |
| 173 | return true; |
| 174 | } |
| 175 | |
| 176 | error_setg_errno(errp, errno, "VFIO_DEVICE_SET_IRQS failure"); |
| 177 | |
| 178 | name = index_to_str(vbasedev, index); |
| 179 | if (name) { |
| 180 | error_prepend(errp, "%s-%d: ", name, subindex); |
| 181 | } else { |
| 182 | error_prepend(errp, "index %d-%d: ", index, subindex); |
| 183 | } |
| 184 | error_prepend(errp, |
| 185 | "Failed to %s %s eventfd signaling for interrupt ", |
| 186 | fd < 0 ? "tear down" : "set up", action_to_str(action)); |
| 187 | return false; |
| 188 | } |
| 189 | |
| 190 | int vfio_device_get_irq_info(VFIODevice *vbasedev, int index, |
| 191 | struct vfio_irq_info *info) |
| 192 | { |
| 193 | memset(info, 0, sizeof(*info)); |
| 194 | |
| 195 | info->argsz = sizeof(*info); |
| 196 | info->index = index; |
| 197 | |
| 198 | return vbasedev->io_ops->get_irq_info(vbasedev, info); |
| 199 | } |
| 200 | |
| 201 | int vfio_device_get_region_info(VFIODevice *vbasedev, int index, |
| 202 | struct vfio_region_info **info) |
| 203 | { |
| 204 | size_t argsz = sizeof(struct vfio_region_info); |
| 205 | int fd = -1; |
| 206 | int ret; |
| 207 | |
| 208 | /* |
| 209 | * We only set up the region info cache for the initial number of regions. |
| 210 | * |
| 211 | * Since a VFIO device may later increase the number of regions then use |
| 212 | * such regions with an index past ->num_initial_regions, don't attempt to |
| 213 | * use the info cache in those cases. |
| 214 | */ |
| 215 | if (index < vbasedev->num_initial_regions) { |
| 216 | /* check cache */ |
| 217 | if (vbasedev->reginfo[index] != NULL) { |
| 218 | *info = vbasedev->reginfo[index]; |
| 219 | return 0; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | *info = g_malloc0(argsz); |
| 224 | |
| 225 | (*info)->index = index; |
| 226 | retry: |
| 227 | (*info)->argsz = argsz; |
| 228 | |
| 229 | ret = vbasedev->io_ops->get_region_info(vbasedev, *info, &fd); |
| 230 | if (ret != 0) { |
| 231 | g_free(*info); |
| 232 | *info = NULL; |
| 233 | return ret; |
| 234 | } |
| 235 | |
| 236 | if ((*info)->argsz > argsz) { |
| 237 | argsz = (*info)->argsz; |
| 238 | *info = g_realloc(*info, argsz); |
| 239 | |
| 240 | if (fd != -1) { |
| 241 | close(fd); |
| 242 | fd = -1; |
| 243 | } |
| 244 | |
| 245 | goto retry; |
| 246 | } |
| 247 | |
| 248 | if (index < vbasedev->num_initial_regions) { |
| 249 | /* fill cache */ |
| 250 | vbasedev->reginfo[index] = *info; |
| 251 | if (vbasedev->region_fds != NULL) { |
| 252 | vbasedev->region_fds[index] = fd; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | int vfio_device_get_region_fd(VFIODevice *vbasedev, int index) |
| 260 | { |
| 261 | return vbasedev->region_fds ? |
| 262 | vbasedev->region_fds[index] : |
| 263 | vbasedev->fd; |
| 264 | } |
| 265 | |
| 266 | int vfio_device_get_region_info_type(VFIODevice *vbasedev, uint32_t type, |
| 267 | uint32_t subtype, struct vfio_region_info **info) |
| 268 | { |
| 269 | int i; |
| 270 | |
| 271 | for (i = 0; i < vbasedev->num_initial_regions; i++) { |
| 272 | struct vfio_info_cap_header *hdr; |
| 273 | struct vfio_region_info_cap_type *cap_type; |
| 274 | |
| 275 | if (vfio_device_get_region_info(vbasedev, i, info)) { |
| 276 | continue; |
| 277 | } |
| 278 | |
| 279 | hdr = vfio_get_region_info_cap(*info, VFIO_REGION_INFO_CAP_TYPE); |
| 280 | if (!hdr) { |
| 281 | continue; |
| 282 | } |
| 283 | |
| 284 | cap_type = container_of(hdr, struct vfio_region_info_cap_type, header); |
| 285 | |
| 286 | trace_vfio_device_get_region_info_type(vbasedev->name, i, |
| 287 | cap_type->type, cap_type->subtype); |
| 288 | |
| 289 | if (cap_type->type == type && cap_type->subtype == subtype) { |
| 290 | return 0; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | *info = NULL; |
| 295 | return -ENODEV; |
| 296 | } |
| 297 | |
| 298 | bool vfio_device_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type) |
| 299 | { |
| 300 | struct vfio_region_info *info = NULL; |
| 301 | bool ret = false; |
| 302 | |
| 303 | if (!vfio_device_get_region_info(vbasedev, region, &info)) { |
| 304 | if (vfio_get_region_info_cap(info, cap_type)) { |
| 305 | ret = true; |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | return ret; |
| 310 | } |
| 311 | |
| 312 | bool vfio_device_get_name(VFIODevice *vbasedev, Error **errp) |
| 313 | { |
| 314 | ERRP_GUARD(); |
| 315 | struct stat st; |
| 316 | |
| 317 | if (vbasedev->fd < 0) { |
| 318 | if (stat(vbasedev->sysfsdev, &st) < 0) { |
| 319 | error_setg_errno(errp, errno, "no such host device"); |
| 320 | error_prepend(errp, VFIO_MSG_PREFIX, vbasedev->sysfsdev); |
| 321 | return false; |
| 322 | } |
| 323 | /* User may specify a name, e.g: VFIO platform device */ |
| 324 | if (!vbasedev->name) { |
| 325 | vbasedev->name = g_path_get_basename(vbasedev->sysfsdev); |
| 326 | } |
| 327 | } else { |
| 328 | if (!vbasedev->iommufd) { |
| 329 | error_setg(errp, "Use FD passing only with iommufd backend"); |
| 330 | return false; |
| 331 | } |
| 332 | if (!vbasedev->name) { |
| 333 | |
| 334 | if (vbasedev->dev->id) { |
| 335 | vbasedev->name = g_strdup(vbasedev->dev->id); |
| 336 | return true; |
| 337 | } else { |
| 338 | /* |
| 339 | * Assign a name so any function printing it will not break. |
| 340 | * The fd number changes across processes, so this cannot be |
| 341 | * used as an invariant name for CPR. |
| 342 | */ |
| 343 | vbasedev->name = g_strdup_printf("VFIO_FD%d", vbasedev->fd); |
| 344 | error_setg(&vbasedev->cpr.id_blocker, |
| 345 | "vfio device with fd=%d needs an id property", |
| 346 | vbasedev->fd); |
| 347 | return migrate_add_blocker_modes(&vbasedev->cpr.id_blocker, |
| 348 | BIT(MIG_MODE_CPR_TRANSFER), |
| 349 | errp) == 0; |
| 350 | } |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | return true; |
| 355 | } |
| 356 | |
| 357 | void vfio_device_free_name(VFIODevice *vbasedev) |
| 358 | { |
| 359 | g_clear_pointer(&vbasedev->name, g_free); |
| 360 | migrate_del_blocker(&vbasedev->cpr.id_blocker); |
| 361 | } |
| 362 | |
| 363 | void vfio_device_set_fd(VFIODevice *vbasedev, const char *str, Error **errp) |
| 364 | { |
| 365 | vbasedev->fd = cpr_get_fd_param(vbasedev->dev->id, str, 0, errp); |
| 366 | } |
| 367 | |
| 368 | static VFIODeviceIOOps vfio_device_io_ops_ioctl; |
| 369 | |
| 370 | void vfio_device_init(VFIODevice *vbasedev, int type, VFIODeviceOps *ops, |
| 371 | DeviceState *dev, bool ram_discard) |
| 372 | { |
| 373 | vbasedev->type = type; |
| 374 | vbasedev->ops = ops; |
| 375 | vbasedev->io_ops = &vfio_device_io_ops_ioctl; |
| 376 | vbasedev->dev = dev; |
| 377 | vbasedev->fd = -1; |
| 378 | vbasedev->use_region_fds = false; |
| 379 | |
| 380 | vbasedev->ram_block_discard_allowed = ram_discard; |
| 381 | } |
| 382 | |
| 383 | int vfio_device_get_aw_bits(VFIODevice *vdev) |
| 384 | { |
| 385 | /* |
| 386 | * iova_ranges is a sorted list. For old kernels that support |
| 387 | * VFIO but not support query of iova ranges, iova_ranges is NULL, |
| 388 | * in this case HOST_IOMMU_DEVICE_CAP_AW_BITS_MAX(64) is returned. |
| 389 | */ |
| 390 | GList *l = g_list_last(vdev->bcontainer->iova_ranges); |
| 391 | |
| 392 | if (l) { |
| 393 | Range *range = l->data; |
| 394 | return range_get_last_bit(range) + 1; |
| 395 | } |
| 396 | |
| 397 | return HOST_IOMMU_DEVICE_CAP_AW_BITS_MAX; |
| 398 | } |
| 399 | |
| 400 | bool vfio_device_is_mdev(VFIODevice *vbasedev) |
| 401 | { |
| 402 | g_autofree char *subsys = NULL; |
| 403 | g_autofree char *tmp = NULL; |
| 404 | |
| 405 | if (!vbasedev->sysfsdev) { |
| 406 | return false; |
| 407 | } |
| 408 | |
| 409 | tmp = g_strdup_printf("%s/subsystem", vbasedev->sysfsdev); |
| 410 | subsys = realpath(tmp, NULL); |
| 411 | return subsys && (strcmp(subsys, "/sys/bus/mdev") == 0); |
| 412 | } |
| 413 | |
| 414 | bool vfio_device_dirty_pages_disabled(VFIODevice *vbasedev) |
| 415 | { |
| 416 | return (!vbasedev->dirty_pages_supported || |
| 417 | vbasedev->device_dirty_page_tracking == ON_OFF_AUTO_OFF); |
| 418 | } |
| 419 | |
| 420 | bool vfio_device_hiod_create_and_realize(VFIODevice *vbasedev, |
| 421 | const char *typename, Error **errp) |
| 422 | { |
| 423 | HostIOMMUDevice *hiod; |
| 424 | |
| 425 | if (vbasedev->mdev) { |
| 426 | return true; |
| 427 | } |
| 428 | |
| 429 | hiod = HOST_IOMMU_DEVICE(object_new(typename)); |
| 430 | |
| 431 | if (!HOST_IOMMU_DEVICE_GET_CLASS(hiod)->realize(hiod, vbasedev, errp)) { |
| 432 | object_unref(hiod); |
| 433 | return false; |
| 434 | } |
| 435 | |
| 436 | vbasedev->hiod = hiod; |
| 437 | return true; |
| 438 | } |
| 439 | |
| 440 | VFIODevice *vfio_get_vfio_device(Object *obj) |
| 441 | { |
| 442 | if (object_dynamic_cast(obj, TYPE_VFIO_PCI)) { |
| 443 | return &VFIO_PCI_DEVICE(obj)->vbasedev; |
| 444 | } else { |
| 445 | return NULL; |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | bool vfio_device_attach_by_iommu_type(const char *iommu_type, char *name, |
| 450 | VFIODevice *vbasedev, AddressSpace *as, |
| 451 | Error **errp) |
| 452 | { |
| 453 | const VFIOIOMMUClass *ops = |
| 454 | VFIO_IOMMU_CLASS(object_class_by_name(iommu_type)); |
| 455 | |
| 456 | assert(ops); |
| 457 | |
| 458 | return ops->attach_device(name, vbasedev, as, errp); |
| 459 | } |
| 460 | |
| 461 | bool vfio_device_attach(char *name, VFIODevice *vbasedev, |
| 462 | AddressSpace *as, Error **errp) |
| 463 | { |
| 464 | const char *iommu_type = vbasedev->iommufd ? |
| 465 | TYPE_VFIO_IOMMU_IOMMUFD : |
| 466 | TYPE_VFIO_IOMMU_LEGACY; |
| 467 | |
| 468 | return vfio_device_attach_by_iommu_type(iommu_type, name, vbasedev, |
| 469 | as, errp); |
| 470 | } |
| 471 | |
| 472 | void vfio_device_detach(VFIODevice *vbasedev) |
| 473 | { |
| 474 | if (!vbasedev->bcontainer) { |
| 475 | return; |
| 476 | } |
| 477 | VFIO_IOMMU_GET_CLASS(vbasedev->bcontainer)->detach_device(vbasedev); |
| 478 | } |
| 479 | |
| 480 | void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainer *bcontainer, |
| 481 | struct vfio_device_info *info) |
| 482 | { |
| 483 | int i; |
| 484 | |
| 485 | vbasedev->num_irqs = info->num_irqs; |
| 486 | vbasedev->num_initial_regions = info->num_regions; |
| 487 | vbasedev->flags = info->flags; |
| 488 | vbasedev->reset_works = !!(info->flags & VFIO_DEVICE_FLAGS_RESET); |
| 489 | |
| 490 | vbasedev->bcontainer = bcontainer; |
| 491 | QLIST_INSERT_HEAD(&bcontainer->device_list, vbasedev, container_next); |
| 492 | |
| 493 | QLIST_INSERT_HEAD(&vfio_device_list, vbasedev, global_next); |
| 494 | |
| 495 | vbasedev->reginfo = g_new0(struct vfio_region_info *, |
| 496 | vbasedev->num_initial_regions); |
| 497 | if (vbasedev->use_region_fds) { |
| 498 | vbasedev->region_fds = g_new0(int, vbasedev->num_initial_regions); |
| 499 | for (i = 0; i < vbasedev->num_initial_regions; i++) { |
| 500 | vbasedev->region_fds[i] = -1; |
| 501 | } |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | void vfio_device_unprepare(VFIODevice *vbasedev) |
| 506 | { |
| 507 | int i; |
| 508 | |
| 509 | for (i = 0; i < vbasedev->num_initial_regions; i++) { |
| 510 | g_free(vbasedev->reginfo[i]); |
| 511 | if (vbasedev->region_fds != NULL && vbasedev->region_fds[i] != -1) { |
| 512 | close(vbasedev->region_fds[i]); |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | g_clear_pointer(&vbasedev->reginfo, g_free); |
| 517 | g_clear_pointer(&vbasedev->region_fds, g_free); |
| 518 | |
| 519 | QLIST_REMOVE(vbasedev, container_next); |
| 520 | QLIST_REMOVE(vbasedev, global_next); |
| 521 | vbasedev->bcontainer = NULL; |
| 522 | } |
| 523 | |
| 524 | bool vfio_device_get_viommu_flags_want_nesting_dirty(VFIODevice *vbasedev) |
| 525 | { |
| 526 | VFIOPCIDevice *vdev = vfio_pci_from_vfio_device(vbasedev); |
| 527 | |
| 528 | if (vdev) { |
| 529 | return !!(pci_device_get_viommu_flags(PCI_DEVICE(vdev)) & |
| 530 | VIOMMU_FLAG_WANT_NESTING_DIRTY_TRACKING); |
| 531 | } |
| 532 | return false; |
| 533 | } |
| 534 | |
| 535 | bool vfio_device_get_viommu_flags_want_nesting(VFIODevice *vbasedev) |
| 536 | { |
| 537 | VFIOPCIDevice *vdev = vfio_pci_from_vfio_device(vbasedev); |
| 538 | |
| 539 | if (vdev) { |
| 540 | return !!(pci_device_get_viommu_flags(PCI_DEVICE(vdev)) & |
| 541 | VIOMMU_FLAG_WANT_NESTING_PARENT); |
| 542 | } |
| 543 | return false; |
| 544 | } |
| 545 | |
| 546 | bool vfio_device_get_viommu_flags_want_pasid_attach(VFIODevice *vbasedev) |
| 547 | { |
| 548 | VFIOPCIDevice *vdev = vfio_pci_from_vfio_device(vbasedev); |
| 549 | |
| 550 | if (vdev) { |
| 551 | return !!(pci_device_get_viommu_flags(PCI_DEVICE(vdev)) & |
| 552 | VIOMMU_FLAG_WANT_PASID_ATTACH); |
| 553 | } |
| 554 | return false; |
| 555 | } |
| 556 | |
| 557 | bool vfio_device_get_host_iommu_quirk_bypass_ro(VFIODevice *vbasedev, |
| 558 | uint32_t type, void *caps, |
| 559 | uint32_t size) |
| 560 | { |
| 561 | VFIOPCIDevice *vdev = vfio_pci_from_vfio_device(vbasedev); |
| 562 | |
| 563 | if (vdev) { |
| 564 | return !!(pci_device_get_host_iommu_quirks(PCI_DEVICE(vdev), type, |
| 565 | caps, size) & |
| 566 | HOST_IOMMU_QUIRK_NESTING_PARENT_BYPASS_RO); |
| 567 | } |
| 568 | return false; |
| 569 | } |
| 570 | |
| 571 | int vfio_device_get_feature(VFIODevice *vbasedev, |
| 572 | struct vfio_device_feature *feature) |
| 573 | { |
| 574 | if (!vbasedev->io_ops || !vbasedev->io_ops->device_feature) { |
| 575 | return -EINVAL; |
| 576 | } |
| 577 | return vbasedev->io_ops->device_feature(vbasedev, feature); |
| 578 | } |
| 579 | |
| 580 | /* |
| 581 | * Traditional ioctl() based io |
| 582 | */ |
| 583 | |
| 584 | static int vfio_device_io_device_feature(VFIODevice *vbasedev, |
| 585 | struct vfio_device_feature *feature) |
| 586 | { |
| 587 | int ret; |
| 588 | |
| 589 | ret = ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature); |
| 590 | |
| 591 | return ret < 0 ? -errno : ret; |
| 592 | } |
| 593 | |
| 594 | static int vfio_device_io_get_region_info(VFIODevice *vbasedev, |
| 595 | struct vfio_region_info *info, |
| 596 | int *fd) |
| 597 | { |
| 598 | int ret; |
| 599 | |
| 600 | *fd = -1; |
| 601 | |
| 602 | ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, info); |
| 603 | |
| 604 | return ret < 0 ? -errno : ret; |
| 605 | } |
| 606 | |
| 607 | static int vfio_device_io_get_irq_info(VFIODevice *vbasedev, |
| 608 | struct vfio_irq_info *info) |
| 609 | { |
| 610 | int ret; |
| 611 | |
| 612 | ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_IRQ_INFO, info); |
| 613 | |
| 614 | return ret < 0 ? -errno : ret; |
| 615 | } |
| 616 | |
| 617 | static int vfio_device_io_set_irqs(VFIODevice *vbasedev, |
| 618 | struct vfio_irq_set *irqs) |
| 619 | { |
| 620 | int ret; |
| 621 | |
| 622 | ret = ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, irqs); |
| 623 | |
| 624 | return ret < 0 ? -errno : ret; |
| 625 | } |
| 626 | |
| 627 | static int vfio_device_io_region_read(VFIODevice *vbasedev, uint8_t index, |
| 628 | off_t off, uint32_t size, void *data) |
| 629 | { |
| 630 | struct vfio_region_info *info; |
| 631 | int ret; |
| 632 | |
| 633 | ret = vfio_device_get_region_info(vbasedev, index, &info); |
| 634 | if (ret != 0) { |
| 635 | return ret; |
| 636 | } |
| 637 | |
| 638 | ret = pread(vbasedev->fd, data, size, info->offset + off); |
| 639 | |
| 640 | return ret < 0 ? -errno : ret; |
| 641 | } |
| 642 | |
| 643 | static int vfio_device_io_region_write(VFIODevice *vbasedev, uint8_t index, |
| 644 | off_t off, uint32_t size, void *data, |
| 645 | bool post) |
| 646 | { |
| 647 | struct vfio_region_info *info; |
| 648 | int ret; |
| 649 | |
| 650 | ret = vfio_device_get_region_info(vbasedev, index, &info); |
| 651 | if (ret != 0) { |
| 652 | return ret; |
| 653 | } |
| 654 | |
| 655 | ret = pwrite(vbasedev->fd, data, size, info->offset + off); |
| 656 | |
| 657 | return ret < 0 ? -errno : ret; |
| 658 | } |
| 659 | |
| 660 | static VFIODeviceIOOps vfio_device_io_ops_ioctl = { |
| 661 | .capabilities = VFIO_IO_CAP_DMA_BUF, |
| 662 | |
| 663 | .device_feature = vfio_device_io_device_feature, |
| 664 | .get_region_info = vfio_device_io_get_region_info, |
| 665 | .get_irq_info = vfio_device_io_get_irq_info, |
| 666 | .set_irqs = vfio_device_io_set_irqs, |
| 667 | .region_read = vfio_device_io_region_read, |
| 668 | .region_write = vfio_device_io_region_write, |
| 669 | }; |