1 /* 2 * Copyright (C) 2012 Red Hat, Inc. All rights reserved. 3 * Author: Alex Williamson <alex.williamson@redhat.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Derived from original vfio: 10 * Copyright 2010 Cisco Systems, Inc. All rights reserved. 11 * Author: Tom Lyon, pugs@cisco.com 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 16 #include <linux/device.h> 17 #include <linux/eventfd.h> 18 #include <linux/file.h> 19 #include <linux/interrupt.h> 20 #include <linux/iommu.h> 21 #include <linux/module.h> 22 #include <linux/mutex.h> 23 #include <linux/notifier.h> 24 #include <linux/pci.h> 25 #include <linux/pm_runtime.h> 26 #include <linux/slab.h> 27 #include <linux/types.h> 28 #include <linux/uaccess.h> 29 #include <linux/vfio.h> 30 #include <linux/vgaarb.h> 31 32 #include "vfio_pci_private.h" 33 34 #define DRIVER_VERSION "0.2" 35 #define DRIVER_AUTHOR "Alex Williamson <alex.williamson@redhat.com>" 36 #define DRIVER_DESC "VFIO PCI - User Level meta-driver" 37 38 static char ids[1024] __initdata; 39 module_param_string(ids, ids, sizeof(ids), 0); 40 MODULE_PARM_DESC(ids, "Initial PCI IDs to add to the vfio driver, format is \"vendor:device[:subvendor[:subdevice[:class[:class_mask]]]]\" and multiple comma separated entries can be specified"); 41 42 static bool nointxmask; 43 module_param_named(nointxmask, nointxmask, bool, S_IRUGO | S_IWUSR); 44 MODULE_PARM_DESC(nointxmask, 45 "Disable support for PCI 2.3 style INTx masking. If this resolves problems for specific devices, report lspci -vvvxxx to linux-pci@vger.kernel.org so the device can be fixed automatically via the broken_intx_masking flag."); 46 47 #ifdef CONFIG_VFIO_PCI_VGA 48 static bool disable_vga; 49 module_param(disable_vga, bool, S_IRUGO); 50 MODULE_PARM_DESC(disable_vga, "Disable VGA resource access through vfio-pci"); 51 #endif 52 53 static bool disable_idle_d3; 54 module_param(disable_idle_d3, bool, S_IRUGO | S_IWUSR); 55 MODULE_PARM_DESC(disable_idle_d3, 56 "Disable using the PCI D3 low power state for idle, unused devices"); 57 58 static DEFINE_MUTEX(driver_lock); 59 60 static inline bool vfio_vga_disabled(void) 61 { 62 #ifdef CONFIG_VFIO_PCI_VGA 63 return disable_vga; 64 #else 65 return true; 66 #endif 67 } 68 69 /* 70 * Our VGA arbiter participation is limited since we don't know anything 71 * about the device itself. However, if the device is the only VGA device 72 * downstream of a bridge and VFIO VGA support is disabled, then we can 73 * safely return legacy VGA IO and memory as not decoded since the user 74 * has no way to get to it and routing can be disabled externally at the 75 * bridge. 76 */ 77 static unsigned int vfio_pci_set_vga_decode(void *opaque, bool single_vga) 78 { 79 struct vfio_pci_device *vdev = opaque; 80 struct pci_dev *tmp = NULL, *pdev = vdev->pdev; 81 unsigned char max_busnr; 82 unsigned int decodes; 83 84 if (single_vga || !vfio_vga_disabled() || pci_is_root_bus(pdev->bus)) 85 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM | 86 VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM; 87 88 max_busnr = pci_bus_max_busnr(pdev->bus); 89 decodes = VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; 90 91 while ((tmp = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, tmp)) != NULL) { 92 if (tmp == pdev || 93 pci_domain_nr(tmp->bus) != pci_domain_nr(pdev->bus) || 94 pci_is_root_bus(tmp->bus)) 95 continue; 96 97 if (tmp->bus->number >= pdev->bus->number && 98 tmp->bus->number <= max_busnr) { 99 pci_dev_put(tmp); 100 decodes |= VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM; 101 break; 102 } 103 } 104 105 return decodes; 106 } 107 108 static inline bool vfio_pci_is_vga(struct pci_dev *pdev) 109 { 110 return (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA; 111 } 112 113 static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev); 114 static void vfio_pci_disable(struct vfio_pci_device *vdev); 115 116 static int vfio_pci_enable(struct vfio_pci_device *vdev) 117 { 118 struct pci_dev *pdev = vdev->pdev; 119 int ret; 120 u16 cmd; 121 u8 msix_pos; 122 123 pci_set_power_state(pdev, PCI_D0); 124 125 /* Don't allow our initial saved state to include busmaster */ 126 pci_clear_master(pdev); 127 128 ret = pci_enable_device(pdev); 129 if (ret) 130 return ret; 131 132 vdev->reset_works = (pci_reset_function(pdev) == 0); 133 pci_save_state(pdev); 134 vdev->pci_saved_state = pci_store_saved_state(pdev); 135 if (!vdev->pci_saved_state) 136 pr_debug("%s: Couldn't store %s saved state\n", 137 __func__, dev_name(&pdev->dev)); 138 139 ret = vfio_config_init(vdev); 140 if (ret) { 141 kfree(vdev->pci_saved_state); 142 vdev->pci_saved_state = NULL; 143 pci_disable_device(pdev); 144 return ret; 145 } 146 147 if (likely(!nointxmask)) 148 vdev->pci_2_3 = pci_intx_mask_supported(pdev); 149 150 pci_read_config_word(pdev, PCI_COMMAND, &cmd); 151 if (vdev->pci_2_3 && (cmd & PCI_COMMAND_INTX_DISABLE)) { 152 cmd &= ~PCI_COMMAND_INTX_DISABLE; 153 pci_write_config_word(pdev, PCI_COMMAND, cmd); 154 } 155 156 msix_pos = pdev->msix_cap; 157 if (msix_pos) { 158 u16 flags; 159 u32 table; 160 161 pci_read_config_word(pdev, msix_pos + PCI_MSIX_FLAGS, &flags); 162 pci_read_config_dword(pdev, msix_pos + PCI_MSIX_TABLE, &table); 163 164 vdev->msix_bar = table & PCI_MSIX_TABLE_BIR; 165 vdev->msix_offset = table & PCI_MSIX_TABLE_OFFSET; 166 vdev->msix_size = ((flags & PCI_MSIX_FLAGS_QSIZE) + 1) * 16; 167 } else 168 vdev->msix_bar = 0xFF; 169 170 if (!vfio_vga_disabled() && vfio_pci_is_vga(pdev)) 171 vdev->has_vga = true; 172 173 174 if (vfio_pci_is_vga(pdev) && 175 pdev->vendor == PCI_VENDOR_ID_INTEL && 176 IS_ENABLED(CONFIG_VFIO_PCI_IGD)) { 177 ret = vfio_pci_igd_init(vdev); 178 if (ret) { 179 dev_warn(&vdev->pdev->dev, 180 "Failed to setup Intel IGD regions\n"); 181 vfio_pci_disable(vdev); 182 return ret; 183 } 184 } 185 186 return 0; 187 } 188 189 static void vfio_pci_disable(struct vfio_pci_device *vdev) 190 { 191 struct pci_dev *pdev = vdev->pdev; 192 int i, bar; 193 194 /* Stop the device from further DMA */ 195 pci_clear_master(pdev); 196 197 vfio_pci_set_irqs_ioctl(vdev, VFIO_IRQ_SET_DATA_NONE | 198 VFIO_IRQ_SET_ACTION_TRIGGER, 199 vdev->irq_type, 0, 0, NULL); 200 201 vdev->virq_disabled = false; 202 203 for (i = 0; i < vdev->num_regions; i++) 204 vdev->region[i].ops->release(vdev, &vdev->region[i]); 205 206 vdev->num_regions = 0; 207 kfree(vdev->region); 208 vdev->region = NULL; /* don't krealloc a freed pointer */ 209 210 vfio_config_free(vdev); 211 212 for (bar = PCI_STD_RESOURCES; bar <= PCI_STD_RESOURCE_END; bar++) { 213 if (!vdev->barmap[bar]) 214 continue; 215 pci_iounmap(pdev, vdev->barmap[bar]); 216 pci_release_selected_regions(pdev, 1 << bar); 217 vdev->barmap[bar] = NULL; 218 } 219 220 vdev->needs_reset = true; 221 222 /* 223 * If we have saved state, restore it. If we can reset the device, 224 * even better. Resetting with current state seems better than 225 * nothing, but saving and restoring current state without reset 226 * is just busy work. 227 */ 228 if (pci_load_and_free_saved_state(pdev, &vdev->pci_saved_state)) { 229 pr_info("%s: Couldn't reload %s saved state\n", 230 __func__, dev_name(&pdev->dev)); 231 232 if (!vdev->reset_works) 233 goto out; 234 235 pci_save_state(pdev); 236 } 237 238 /* 239 * Disable INTx and MSI, presumably to avoid spurious interrupts 240 * during reset. Stolen from pci_reset_function() 241 */ 242 pci_write_config_word(pdev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE); 243 244 /* 245 * Try to reset the device. The success of this is dependent on 246 * being able to lock the device, which is not always possible. 247 */ 248 if (vdev->reset_works && !pci_try_reset_function(pdev)) 249 vdev->needs_reset = false; 250 251 pci_restore_state(pdev); 252 out: 253 pci_disable_device(pdev); 254 255 vfio_pci_try_bus_reset(vdev); 256 257 if (!disable_idle_d3) 258 pci_set_power_state(pdev, PCI_D3hot); 259 } 260 261 static void vfio_pci_release(void *device_data) 262 { 263 struct vfio_pci_device *vdev = device_data; 264 265 mutex_lock(&driver_lock); 266 267 if (!(--vdev->refcnt)) { 268 vfio_spapr_pci_eeh_release(vdev->pdev); 269 vfio_pci_disable(vdev); 270 } 271 272 mutex_unlock(&driver_lock); 273 274 module_put(THIS_MODULE); 275 } 276 277 static int vfio_pci_open(void *device_data) 278 { 279 struct vfio_pci_device *vdev = device_data; 280 int ret = 0; 281 282 if (!try_module_get(THIS_MODULE)) 283 return -ENODEV; 284 285 mutex_lock(&driver_lock); 286 287 if (!vdev->refcnt) { 288 ret = vfio_pci_enable(vdev); 289 if (ret) 290 goto error; 291 292 vfio_spapr_pci_eeh_open(vdev->pdev); 293 } 294 vdev->refcnt++; 295 error: 296 mutex_unlock(&driver_lock); 297 if (ret) 298 module_put(THIS_MODULE); 299 return ret; 300 } 301 302 static int vfio_pci_get_irq_count(struct vfio_pci_device *vdev, int irq_type) 303 { 304 if (irq_type == VFIO_PCI_INTX_IRQ_INDEX) { 305 u8 pin; 306 pci_read_config_byte(vdev->pdev, PCI_INTERRUPT_PIN, &pin); 307 if (IS_ENABLED(CONFIG_VFIO_PCI_INTX) && pin) 308 return 1; 309 310 } else if (irq_type == VFIO_PCI_MSI_IRQ_INDEX) { 311 u8 pos; 312 u16 flags; 313 314 pos = vdev->pdev->msi_cap; 315 if (pos) { 316 pci_read_config_word(vdev->pdev, 317 pos + PCI_MSI_FLAGS, &flags); 318 return 1 << ((flags & PCI_MSI_FLAGS_QMASK) >> 1); 319 } 320 } else if (irq_type == VFIO_PCI_MSIX_IRQ_INDEX) { 321 u8 pos; 322 u16 flags; 323 324 pos = vdev->pdev->msix_cap; 325 if (pos) { 326 pci_read_config_word(vdev->pdev, 327 pos + PCI_MSIX_FLAGS, &flags); 328 329 return (flags & PCI_MSIX_FLAGS_QSIZE) + 1; 330 } 331 } else if (irq_type == VFIO_PCI_ERR_IRQ_INDEX) { 332 if (pci_is_pcie(vdev->pdev)) 333 return 1; 334 } else if (irq_type == VFIO_PCI_REQ_IRQ_INDEX) { 335 return 1; 336 } 337 338 return 0; 339 } 340 341 static int vfio_pci_count_devs(struct pci_dev *pdev, void *data) 342 { 343 (*(int *)data)++; 344 return 0; 345 } 346 347 struct vfio_pci_fill_info { 348 int max; 349 int cur; 350 struct vfio_pci_dependent_device *devices; 351 }; 352 353 static int vfio_pci_fill_devs(struct pci_dev *pdev, void *data) 354 { 355 struct vfio_pci_fill_info *fill = data; 356 struct iommu_group *iommu_group; 357 358 if (fill->cur == fill->max) 359 return -EAGAIN; /* Something changed, try again */ 360 361 iommu_group = iommu_group_get(&pdev->dev); 362 if (!iommu_group) 363 return -EPERM; /* Cannot reset non-isolated devices */ 364 365 fill->devices[fill->cur].group_id = iommu_group_id(iommu_group); 366 fill->devices[fill->cur].segment = pci_domain_nr(pdev->bus); 367 fill->devices[fill->cur].bus = pdev->bus->number; 368 fill->devices[fill->cur].devfn = pdev->devfn; 369 fill->cur++; 370 iommu_group_put(iommu_group); 371 return 0; 372 } 373 374 struct vfio_pci_group_entry { 375 struct vfio_group *group; 376 int id; 377 }; 378 379 struct vfio_pci_group_info { 380 int count; 381 struct vfio_pci_group_entry *groups; 382 }; 383 384 static int vfio_pci_validate_devs(struct pci_dev *pdev, void *data) 385 { 386 struct vfio_pci_group_info *info = data; 387 struct iommu_group *group; 388 int id, i; 389 390 group = iommu_group_get(&pdev->dev); 391 if (!group) 392 return -EPERM; 393 394 id = iommu_group_id(group); 395 396 for (i = 0; i < info->count; i++) 397 if (info->groups[i].id == id) 398 break; 399 400 iommu_group_put(group); 401 402 return (i == info->count) ? -EINVAL : 0; 403 } 404 405 static bool vfio_pci_dev_below_slot(struct pci_dev *pdev, struct pci_slot *slot) 406 { 407 for (; pdev; pdev = pdev->bus->self) 408 if (pdev->bus == slot->bus) 409 return (pdev->slot == slot); 410 return false; 411 } 412 413 struct vfio_pci_walk_info { 414 int (*fn)(struct pci_dev *, void *data); 415 void *data; 416 struct pci_dev *pdev; 417 bool slot; 418 int ret; 419 }; 420 421 static int vfio_pci_walk_wrapper(struct pci_dev *pdev, void *data) 422 { 423 struct vfio_pci_walk_info *walk = data; 424 425 if (!walk->slot || vfio_pci_dev_below_slot(pdev, walk->pdev->slot)) 426 walk->ret = walk->fn(pdev, walk->data); 427 428 return walk->ret; 429 } 430 431 static int vfio_pci_for_each_slot_or_bus(struct pci_dev *pdev, 432 int (*fn)(struct pci_dev *, 433 void *data), void *data, 434 bool slot) 435 { 436 struct vfio_pci_walk_info walk = { 437 .fn = fn, .data = data, .pdev = pdev, .slot = slot, .ret = 0, 438 }; 439 440 pci_walk_bus(pdev->bus, vfio_pci_walk_wrapper, &walk); 441 442 return walk.ret; 443 } 444 445 static int msix_sparse_mmap_cap(struct vfio_pci_device *vdev, 446 struct vfio_info_cap *caps) 447 { 448 struct vfio_info_cap_header *header; 449 struct vfio_region_info_cap_sparse_mmap *sparse; 450 size_t end, size; 451 int nr_areas = 2, i = 0; 452 453 end = pci_resource_len(vdev->pdev, vdev->msix_bar); 454 455 /* If MSI-X table is aligned to the start or end, only one area */ 456 if (((vdev->msix_offset & PAGE_MASK) == 0) || 457 (PAGE_ALIGN(vdev->msix_offset + vdev->msix_size) >= end)) 458 nr_areas = 1; 459 460 size = sizeof(*sparse) + (nr_areas * sizeof(*sparse->areas)); 461 462 header = vfio_info_cap_add(caps, size, 463 VFIO_REGION_INFO_CAP_SPARSE_MMAP, 1); 464 if (IS_ERR(header)) 465 return PTR_ERR(header); 466 467 sparse = container_of(header, 468 struct vfio_region_info_cap_sparse_mmap, header); 469 sparse->nr_areas = nr_areas; 470 471 if (vdev->msix_offset & PAGE_MASK) { 472 sparse->areas[i].offset = 0; 473 sparse->areas[i].size = vdev->msix_offset & PAGE_MASK; 474 i++; 475 } 476 477 if (PAGE_ALIGN(vdev->msix_offset + vdev->msix_size) < end) { 478 sparse->areas[i].offset = PAGE_ALIGN(vdev->msix_offset + 479 vdev->msix_size); 480 sparse->areas[i].size = end - sparse->areas[i].offset; 481 i++; 482 } 483 484 return 0; 485 } 486 487 static int region_type_cap(struct vfio_pci_device *vdev, 488 struct vfio_info_cap *caps, 489 unsigned int type, unsigned int subtype) 490 { 491 struct vfio_info_cap_header *header; 492 struct vfio_region_info_cap_type *cap; 493 494 header = vfio_info_cap_add(caps, sizeof(*cap), 495 VFIO_REGION_INFO_CAP_TYPE, 1); 496 if (IS_ERR(header)) 497 return PTR_ERR(header); 498 499 cap = container_of(header, struct vfio_region_info_cap_type, header); 500 cap->type = type; 501 cap->subtype = subtype; 502 503 return 0; 504 } 505 506 int vfio_pci_register_dev_region(struct vfio_pci_device *vdev, 507 unsigned int type, unsigned int subtype, 508 const struct vfio_pci_regops *ops, 509 size_t size, u32 flags, void *data) 510 { 511 struct vfio_pci_region *region; 512 513 region = krealloc(vdev->region, 514 (vdev->num_regions + 1) * sizeof(*region), 515 GFP_KERNEL); 516 if (!region) 517 return -ENOMEM; 518 519 vdev->region = region; 520 vdev->region[vdev->num_regions].type = type; 521 vdev->region[vdev->num_regions].subtype = subtype; 522 vdev->region[vdev->num_regions].ops = ops; 523 vdev->region[vdev->num_regions].size = size; 524 vdev->region[vdev->num_regions].flags = flags; 525 vdev->region[vdev->num_regions].data = data; 526 527 vdev->num_regions++; 528 529 return 0; 530 } 531 532 static long vfio_pci_ioctl(void *device_data, 533 unsigned int cmd, unsigned long arg) 534 { 535 struct vfio_pci_device *vdev = device_data; 536 unsigned long minsz; 537 538 if (cmd == VFIO_DEVICE_GET_INFO) { 539 struct vfio_device_info info; 540 541 minsz = offsetofend(struct vfio_device_info, num_irqs); 542 543 if (copy_from_user(&info, (void __user *)arg, minsz)) 544 return -EFAULT; 545 546 if (info.argsz < minsz) 547 return -EINVAL; 548 549 info.flags = VFIO_DEVICE_FLAGS_PCI; 550 551 if (vdev->reset_works) 552 info.flags |= VFIO_DEVICE_FLAGS_RESET; 553 554 info.num_regions = VFIO_PCI_NUM_REGIONS + vdev->num_regions; 555 info.num_irqs = VFIO_PCI_NUM_IRQS; 556 557 return copy_to_user((void __user *)arg, &info, minsz) ? 558 -EFAULT : 0; 559 560 } else if (cmd == VFIO_DEVICE_GET_REGION_INFO) { 561 struct pci_dev *pdev = vdev->pdev; 562 struct vfio_region_info info; 563 struct vfio_info_cap caps = { .buf = NULL, .size = 0 }; 564 int i, ret; 565 566 minsz = offsetofend(struct vfio_region_info, offset); 567 568 if (copy_from_user(&info, (void __user *)arg, minsz)) 569 return -EFAULT; 570 571 if (info.argsz < minsz) 572 return -EINVAL; 573 574 switch (info.index) { 575 case VFIO_PCI_CONFIG_REGION_INDEX: 576 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 577 info.size = pdev->cfg_size; 578 info.flags = VFIO_REGION_INFO_FLAG_READ | 579 VFIO_REGION_INFO_FLAG_WRITE; 580 break; 581 case VFIO_PCI_BAR0_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX: 582 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 583 info.size = pci_resource_len(pdev, info.index); 584 if (!info.size) { 585 info.flags = 0; 586 break; 587 } 588 589 info.flags = VFIO_REGION_INFO_FLAG_READ | 590 VFIO_REGION_INFO_FLAG_WRITE; 591 if (IS_ENABLED(CONFIG_VFIO_PCI_MMAP) && 592 pci_resource_flags(pdev, info.index) & 593 IORESOURCE_MEM && info.size >= PAGE_SIZE) { 594 info.flags |= VFIO_REGION_INFO_FLAG_MMAP; 595 if (info.index == vdev->msix_bar) { 596 ret = msix_sparse_mmap_cap(vdev, &caps); 597 if (ret) 598 return ret; 599 } 600 } 601 602 break; 603 case VFIO_PCI_ROM_REGION_INDEX: 604 { 605 void __iomem *io; 606 size_t size; 607 608 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 609 info.flags = 0; 610 611 /* Report the BAR size, not the ROM size */ 612 info.size = pci_resource_len(pdev, info.index); 613 if (!info.size) { 614 /* Shadow ROMs appear as PCI option ROMs */ 615 if (pdev->resource[PCI_ROM_RESOURCE].flags & 616 IORESOURCE_ROM_SHADOW) 617 info.size = 0x20000; 618 else 619 break; 620 } 621 622 /* Is it really there? */ 623 io = pci_map_rom(pdev, &size); 624 if (!io || !size) { 625 info.size = 0; 626 break; 627 } 628 pci_unmap_rom(pdev, io); 629 630 info.flags = VFIO_REGION_INFO_FLAG_READ; 631 break; 632 } 633 case VFIO_PCI_VGA_REGION_INDEX: 634 if (!vdev->has_vga) 635 return -EINVAL; 636 637 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 638 info.size = 0xc0000; 639 info.flags = VFIO_REGION_INFO_FLAG_READ | 640 VFIO_REGION_INFO_FLAG_WRITE; 641 642 break; 643 default: 644 if (info.index >= 645 VFIO_PCI_NUM_REGIONS + vdev->num_regions) 646 return -EINVAL; 647 648 i = info.index - VFIO_PCI_NUM_REGIONS; 649 650 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 651 info.size = vdev->region[i].size; 652 info.flags = vdev->region[i].flags; 653 654 ret = region_type_cap(vdev, &caps, 655 vdev->region[i].type, 656 vdev->region[i].subtype); 657 if (ret) 658 return ret; 659 } 660 661 if (caps.size) { 662 info.flags |= VFIO_REGION_INFO_FLAG_CAPS; 663 if (info.argsz < sizeof(info) + caps.size) { 664 info.argsz = sizeof(info) + caps.size; 665 info.cap_offset = 0; 666 } else { 667 vfio_info_cap_shift(&caps, sizeof(info)); 668 if (copy_to_user((void __user *)arg + 669 sizeof(info), caps.buf, 670 caps.size)) { 671 kfree(caps.buf); 672 return -EFAULT; 673 } 674 info.cap_offset = sizeof(info); 675 } 676 677 kfree(caps.buf); 678 } 679 680 return copy_to_user((void __user *)arg, &info, minsz) ? 681 -EFAULT : 0; 682 683 } else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) { 684 struct vfio_irq_info info; 685 686 minsz = offsetofend(struct vfio_irq_info, count); 687 688 if (copy_from_user(&info, (void __user *)arg, minsz)) 689 return -EFAULT; 690 691 if (info.argsz < minsz || info.index >= VFIO_PCI_NUM_IRQS) 692 return -EINVAL; 693 694 switch (info.index) { 695 case VFIO_PCI_INTX_IRQ_INDEX ... VFIO_PCI_MSIX_IRQ_INDEX: 696 case VFIO_PCI_REQ_IRQ_INDEX: 697 break; 698 case VFIO_PCI_ERR_IRQ_INDEX: 699 if (pci_is_pcie(vdev->pdev)) 700 break; 701 /* pass thru to return error */ 702 default: 703 return -EINVAL; 704 } 705 706 info.flags = VFIO_IRQ_INFO_EVENTFD; 707 708 info.count = vfio_pci_get_irq_count(vdev, info.index); 709 710 if (info.index == VFIO_PCI_INTX_IRQ_INDEX) 711 info.flags |= (VFIO_IRQ_INFO_MASKABLE | 712 VFIO_IRQ_INFO_AUTOMASKED); 713 else 714 info.flags |= VFIO_IRQ_INFO_NORESIZE; 715 716 return copy_to_user((void __user *)arg, &info, minsz) ? 717 -EFAULT : 0; 718 719 } else if (cmd == VFIO_DEVICE_SET_IRQS) { 720 struct vfio_irq_set hdr; 721 u8 *data = NULL; 722 int ret = 0; 723 724 minsz = offsetofend(struct vfio_irq_set, count); 725 726 if (copy_from_user(&hdr, (void __user *)arg, minsz)) 727 return -EFAULT; 728 729 if (hdr.argsz < minsz || hdr.index >= VFIO_PCI_NUM_IRQS || 730 hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK | 731 VFIO_IRQ_SET_ACTION_TYPE_MASK)) 732 return -EINVAL; 733 734 if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) { 735 size_t size; 736 int max = vfio_pci_get_irq_count(vdev, hdr.index); 737 738 if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL) 739 size = sizeof(uint8_t); 740 else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD) 741 size = sizeof(int32_t); 742 else 743 return -EINVAL; 744 745 if (hdr.argsz - minsz < hdr.count * size || 746 hdr.start >= max || hdr.start + hdr.count > max) 747 return -EINVAL; 748 749 data = memdup_user((void __user *)(arg + minsz), 750 hdr.count * size); 751 if (IS_ERR(data)) 752 return PTR_ERR(data); 753 } 754 755 mutex_lock(&vdev->igate); 756 757 ret = vfio_pci_set_irqs_ioctl(vdev, hdr.flags, hdr.index, 758 hdr.start, hdr.count, data); 759 760 mutex_unlock(&vdev->igate); 761 kfree(data); 762 763 return ret; 764 765 } else if (cmd == VFIO_DEVICE_RESET) { 766 return vdev->reset_works ? 767 pci_try_reset_function(vdev->pdev) : -EINVAL; 768 769 } else if (cmd == VFIO_DEVICE_GET_PCI_HOT_RESET_INFO) { 770 struct vfio_pci_hot_reset_info hdr; 771 struct vfio_pci_fill_info fill = { 0 }; 772 struct vfio_pci_dependent_device *devices = NULL; 773 bool slot = false; 774 int ret = 0; 775 776 minsz = offsetofend(struct vfio_pci_hot_reset_info, count); 777 778 if (copy_from_user(&hdr, (void __user *)arg, minsz)) 779 return -EFAULT; 780 781 if (hdr.argsz < minsz) 782 return -EINVAL; 783 784 hdr.flags = 0; 785 786 /* Can we do a slot or bus reset or neither? */ 787 if (!pci_probe_reset_slot(vdev->pdev->slot)) 788 slot = true; 789 else if (pci_probe_reset_bus(vdev->pdev->bus)) 790 return -ENODEV; 791 792 /* How many devices are affected? */ 793 ret = vfio_pci_for_each_slot_or_bus(vdev->pdev, 794 vfio_pci_count_devs, 795 &fill.max, slot); 796 if (ret) 797 return ret; 798 799 WARN_ON(!fill.max); /* Should always be at least one */ 800 801 /* 802 * If there's enough space, fill it now, otherwise return 803 * -ENOSPC and the number of devices affected. 804 */ 805 if (hdr.argsz < sizeof(hdr) + (fill.max * sizeof(*devices))) { 806 ret = -ENOSPC; 807 hdr.count = fill.max; 808 goto reset_info_exit; 809 } 810 811 devices = kcalloc(fill.max, sizeof(*devices), GFP_KERNEL); 812 if (!devices) 813 return -ENOMEM; 814 815 fill.devices = devices; 816 817 ret = vfio_pci_for_each_slot_or_bus(vdev->pdev, 818 vfio_pci_fill_devs, 819 &fill, slot); 820 821 /* 822 * If a device was removed between counting and filling, 823 * we may come up short of fill.max. If a device was 824 * added, we'll have a return of -EAGAIN above. 825 */ 826 if (!ret) 827 hdr.count = fill.cur; 828 829 reset_info_exit: 830 if (copy_to_user((void __user *)arg, &hdr, minsz)) 831 ret = -EFAULT; 832 833 if (!ret) { 834 if (copy_to_user((void __user *)(arg + minsz), devices, 835 hdr.count * sizeof(*devices))) 836 ret = -EFAULT; 837 } 838 839 kfree(devices); 840 return ret; 841 842 } else if (cmd == VFIO_DEVICE_PCI_HOT_RESET) { 843 struct vfio_pci_hot_reset hdr; 844 int32_t *group_fds; 845 struct vfio_pci_group_entry *groups; 846 struct vfio_pci_group_info info; 847 bool slot = false; 848 int i, count = 0, ret = 0; 849 850 minsz = offsetofend(struct vfio_pci_hot_reset, count); 851 852 if (copy_from_user(&hdr, (void __user *)arg, minsz)) 853 return -EFAULT; 854 855 if (hdr.argsz < minsz || hdr.flags) 856 return -EINVAL; 857 858 /* Can we do a slot or bus reset or neither? */ 859 if (!pci_probe_reset_slot(vdev->pdev->slot)) 860 slot = true; 861 else if (pci_probe_reset_bus(vdev->pdev->bus)) 862 return -ENODEV; 863 864 /* 865 * We can't let userspace give us an arbitrarily large 866 * buffer to copy, so verify how many we think there 867 * could be. Note groups can have multiple devices so 868 * one group per device is the max. 869 */ 870 ret = vfio_pci_for_each_slot_or_bus(vdev->pdev, 871 vfio_pci_count_devs, 872 &count, slot); 873 if (ret) 874 return ret; 875 876 /* Somewhere between 1 and count is OK */ 877 if (!hdr.count || hdr.count > count) 878 return -EINVAL; 879 880 group_fds = kcalloc(hdr.count, sizeof(*group_fds), GFP_KERNEL); 881 groups = kcalloc(hdr.count, sizeof(*groups), GFP_KERNEL); 882 if (!group_fds || !groups) { 883 kfree(group_fds); 884 kfree(groups); 885 return -ENOMEM; 886 } 887 888 if (copy_from_user(group_fds, (void __user *)(arg + minsz), 889 hdr.count * sizeof(*group_fds))) { 890 kfree(group_fds); 891 kfree(groups); 892 return -EFAULT; 893 } 894 895 /* 896 * For each group_fd, get the group through the vfio external 897 * user interface and store the group and iommu ID. This 898 * ensures the group is held across the reset. 899 */ 900 for (i = 0; i < hdr.count; i++) { 901 struct vfio_group *group; 902 struct fd f = fdget(group_fds[i]); 903 if (!f.file) { 904 ret = -EBADF; 905 break; 906 } 907 908 group = vfio_group_get_external_user(f.file); 909 fdput(f); 910 if (IS_ERR(group)) { 911 ret = PTR_ERR(group); 912 break; 913 } 914 915 groups[i].group = group; 916 groups[i].id = vfio_external_user_iommu_id(group); 917 } 918 919 kfree(group_fds); 920 921 /* release reference to groups on error */ 922 if (ret) 923 goto hot_reset_release; 924 925 info.count = hdr.count; 926 info.groups = groups; 927 928 /* 929 * Test whether all the affected devices are contained 930 * by the set of groups provided by the user. 931 */ 932 ret = vfio_pci_for_each_slot_or_bus(vdev->pdev, 933 vfio_pci_validate_devs, 934 &info, slot); 935 if (!ret) 936 /* User has access, do the reset */ 937 ret = slot ? pci_try_reset_slot(vdev->pdev->slot) : 938 pci_try_reset_bus(vdev->pdev->bus); 939 940 hot_reset_release: 941 for (i--; i >= 0; i--) 942 vfio_group_put_external_user(groups[i].group); 943 944 kfree(groups); 945 return ret; 946 } 947 948 return -ENOTTY; 949 } 950 951 static ssize_t vfio_pci_rw(void *device_data, char __user *buf, 952 size_t count, loff_t *ppos, bool iswrite) 953 { 954 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); 955 struct vfio_pci_device *vdev = device_data; 956 957 if (index >= VFIO_PCI_NUM_REGIONS + vdev->num_regions) 958 return -EINVAL; 959 960 switch (index) { 961 case VFIO_PCI_CONFIG_REGION_INDEX: 962 return vfio_pci_config_rw(vdev, buf, count, ppos, iswrite); 963 964 case VFIO_PCI_ROM_REGION_INDEX: 965 if (iswrite) 966 return -EINVAL; 967 return vfio_pci_bar_rw(vdev, buf, count, ppos, false); 968 969 case VFIO_PCI_BAR0_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX: 970 return vfio_pci_bar_rw(vdev, buf, count, ppos, iswrite); 971 972 case VFIO_PCI_VGA_REGION_INDEX: 973 return vfio_pci_vga_rw(vdev, buf, count, ppos, iswrite); 974 default: 975 index -= VFIO_PCI_NUM_REGIONS; 976 return vdev->region[index].ops->rw(vdev, buf, 977 count, ppos, iswrite); 978 } 979 980 return -EINVAL; 981 } 982 983 static ssize_t vfio_pci_read(void *device_data, char __user *buf, 984 size_t count, loff_t *ppos) 985 { 986 if (!count) 987 return 0; 988 989 return vfio_pci_rw(device_data, buf, count, ppos, false); 990 } 991 992 static ssize_t vfio_pci_write(void *device_data, const char __user *buf, 993 size_t count, loff_t *ppos) 994 { 995 if (!count) 996 return 0; 997 998 return vfio_pci_rw(device_data, (char __user *)buf, count, ppos, true); 999 } 1000 1001 static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma) 1002 { 1003 struct vfio_pci_device *vdev = device_data; 1004 struct pci_dev *pdev = vdev->pdev; 1005 unsigned int index; 1006 u64 phys_len, req_len, pgoff, req_start; 1007 int ret; 1008 1009 index = vma->vm_pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT); 1010 1011 if (vma->vm_end < vma->vm_start) 1012 return -EINVAL; 1013 if ((vma->vm_flags & VM_SHARED) == 0) 1014 return -EINVAL; 1015 if (index >= VFIO_PCI_ROM_REGION_INDEX) 1016 return -EINVAL; 1017 if (!(pci_resource_flags(pdev, index) & IORESOURCE_MEM)) 1018 return -EINVAL; 1019 1020 phys_len = pci_resource_len(pdev, index); 1021 req_len = vma->vm_end - vma->vm_start; 1022 pgoff = vma->vm_pgoff & 1023 ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); 1024 req_start = pgoff << PAGE_SHIFT; 1025 1026 if (phys_len < PAGE_SIZE || req_start + req_len > phys_len) 1027 return -EINVAL; 1028 1029 if (index == vdev->msix_bar) { 1030 /* 1031 * Disallow mmaps overlapping the MSI-X table; users don't 1032 * get to touch this directly. We could find somewhere 1033 * else to map the overlap, but page granularity is only 1034 * a recommendation, not a requirement, so the user needs 1035 * to know which bits are real. Requiring them to mmap 1036 * around the table makes that clear. 1037 */ 1038 1039 /* If neither entirely above nor below, then it overlaps */ 1040 if (!(req_start >= vdev->msix_offset + vdev->msix_size || 1041 req_start + req_len <= vdev->msix_offset)) 1042 return -EINVAL; 1043 } 1044 1045 /* 1046 * Even though we don't make use of the barmap for the mmap, 1047 * we need to request the region and the barmap tracks that. 1048 */ 1049 if (!vdev->barmap[index]) { 1050 ret = pci_request_selected_regions(pdev, 1051 1 << index, "vfio-pci"); 1052 if (ret) 1053 return ret; 1054 1055 vdev->barmap[index] = pci_iomap(pdev, index, 0); 1056 } 1057 1058 vma->vm_private_data = vdev; 1059 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 1060 vma->vm_pgoff = (pci_resource_start(pdev, index) >> PAGE_SHIFT) + pgoff; 1061 1062 return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, 1063 req_len, vma->vm_page_prot); 1064 } 1065 1066 static void vfio_pci_request(void *device_data, unsigned int count) 1067 { 1068 struct vfio_pci_device *vdev = device_data; 1069 1070 mutex_lock(&vdev->igate); 1071 1072 if (vdev->req_trigger) { 1073 if (!(count % 10)) 1074 dev_notice_ratelimited(&vdev->pdev->dev, 1075 "Relaying device request to user (#%u)\n", 1076 count); 1077 eventfd_signal(vdev->req_trigger, 1); 1078 } else if (count == 0) { 1079 dev_warn(&vdev->pdev->dev, 1080 "No device request channel registered, blocked until released by user\n"); 1081 } 1082 1083 mutex_unlock(&vdev->igate); 1084 } 1085 1086 static const struct vfio_device_ops vfio_pci_ops = { 1087 .name = "vfio-pci", 1088 .open = vfio_pci_open, 1089 .release = vfio_pci_release, 1090 .ioctl = vfio_pci_ioctl, 1091 .read = vfio_pci_read, 1092 .write = vfio_pci_write, 1093 .mmap = vfio_pci_mmap, 1094 .request = vfio_pci_request, 1095 }; 1096 1097 static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1098 { 1099 struct vfio_pci_device *vdev; 1100 struct iommu_group *group; 1101 int ret; 1102 1103 if (pdev->hdr_type != PCI_HEADER_TYPE_NORMAL) 1104 return -EINVAL; 1105 1106 group = vfio_iommu_group_get(&pdev->dev); 1107 if (!group) 1108 return -EINVAL; 1109 1110 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); 1111 if (!vdev) { 1112 vfio_iommu_group_put(group, &pdev->dev); 1113 return -ENOMEM; 1114 } 1115 1116 vdev->pdev = pdev; 1117 vdev->irq_type = VFIO_PCI_NUM_IRQS; 1118 mutex_init(&vdev->igate); 1119 spin_lock_init(&vdev->irqlock); 1120 1121 ret = vfio_add_group_dev(&pdev->dev, &vfio_pci_ops, vdev); 1122 if (ret) { 1123 vfio_iommu_group_put(group, &pdev->dev); 1124 kfree(vdev); 1125 return ret; 1126 } 1127 1128 if (vfio_pci_is_vga(pdev)) { 1129 vga_client_register(pdev, vdev, NULL, vfio_pci_set_vga_decode); 1130 vga_set_legacy_decoding(pdev, 1131 vfio_pci_set_vga_decode(vdev, false)); 1132 } 1133 1134 if (!disable_idle_d3) { 1135 /* 1136 * pci-core sets the device power state to an unknown value at 1137 * bootup and after being removed from a driver. The only 1138 * transition it allows from this unknown state is to D0, which 1139 * typically happens when a driver calls pci_enable_device(). 1140 * We're not ready to enable the device yet, but we do want to 1141 * be able to get to D3. Therefore first do a D0 transition 1142 * before going to D3. 1143 */ 1144 pci_set_power_state(pdev, PCI_D0); 1145 pci_set_power_state(pdev, PCI_D3hot); 1146 } 1147 1148 return ret; 1149 } 1150 1151 static void vfio_pci_remove(struct pci_dev *pdev) 1152 { 1153 struct vfio_pci_device *vdev; 1154 1155 vdev = vfio_del_group_dev(&pdev->dev); 1156 if (!vdev) 1157 return; 1158 1159 vfio_iommu_group_put(pdev->dev.iommu_group, &pdev->dev); 1160 kfree(vdev->region); 1161 kfree(vdev); 1162 1163 if (vfio_pci_is_vga(pdev)) { 1164 vga_client_register(pdev, NULL, NULL, NULL); 1165 vga_set_legacy_decoding(pdev, 1166 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM | 1167 VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM); 1168 } 1169 1170 if (!disable_idle_d3) 1171 pci_set_power_state(pdev, PCI_D0); 1172 } 1173 1174 static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev, 1175 pci_channel_state_t state) 1176 { 1177 struct vfio_pci_device *vdev; 1178 struct vfio_device *device; 1179 1180 device = vfio_device_get_from_dev(&pdev->dev); 1181 if (device == NULL) 1182 return PCI_ERS_RESULT_DISCONNECT; 1183 1184 vdev = vfio_device_data(device); 1185 if (vdev == NULL) { 1186 vfio_device_put(device); 1187 return PCI_ERS_RESULT_DISCONNECT; 1188 } 1189 1190 mutex_lock(&vdev->igate); 1191 1192 if (vdev->err_trigger) 1193 eventfd_signal(vdev->err_trigger, 1); 1194 1195 mutex_unlock(&vdev->igate); 1196 1197 vfio_device_put(device); 1198 1199 return PCI_ERS_RESULT_CAN_RECOVER; 1200 } 1201 1202 static const struct pci_error_handlers vfio_err_handlers = { 1203 .error_detected = vfio_pci_aer_err_detected, 1204 }; 1205 1206 static struct pci_driver vfio_pci_driver = { 1207 .name = "vfio-pci", 1208 .id_table = NULL, /* only dynamic ids */ 1209 .probe = vfio_pci_probe, 1210 .remove = vfio_pci_remove, 1211 .err_handler = &vfio_err_handlers, 1212 }; 1213 1214 struct vfio_devices { 1215 struct vfio_device **devices; 1216 int cur_index; 1217 int max_index; 1218 }; 1219 1220 static int vfio_pci_get_devs(struct pci_dev *pdev, void *data) 1221 { 1222 struct vfio_devices *devs = data; 1223 struct vfio_device *device; 1224 1225 if (devs->cur_index == devs->max_index) 1226 return -ENOSPC; 1227 1228 device = vfio_device_get_from_dev(&pdev->dev); 1229 if (!device) 1230 return -EINVAL; 1231 1232 if (pci_dev_driver(pdev) != &vfio_pci_driver) { 1233 vfio_device_put(device); 1234 return -EBUSY; 1235 } 1236 1237 devs->devices[devs->cur_index++] = device; 1238 return 0; 1239 } 1240 1241 /* 1242 * Attempt to do a bus/slot reset if there are devices affected by a reset for 1243 * this device that are needs_reset and all of the affected devices are unused 1244 * (!refcnt). Callers are required to hold driver_lock when calling this to 1245 * prevent device opens and concurrent bus reset attempts. We prevent device 1246 * unbinds by acquiring and holding a reference to the vfio_device. 1247 * 1248 * NB: vfio-core considers a group to be viable even if some devices are 1249 * bound to drivers like pci-stub or pcieport. Here we require all devices 1250 * to be bound to vfio_pci since that's the only way we can be sure they 1251 * stay put. 1252 */ 1253 static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev) 1254 { 1255 struct vfio_devices devs = { .cur_index = 0 }; 1256 int i = 0, ret = -EINVAL; 1257 bool needs_reset = false, slot = false; 1258 struct vfio_pci_device *tmp; 1259 1260 if (!pci_probe_reset_slot(vdev->pdev->slot)) 1261 slot = true; 1262 else if (pci_probe_reset_bus(vdev->pdev->bus)) 1263 return; 1264 1265 if (vfio_pci_for_each_slot_or_bus(vdev->pdev, vfio_pci_count_devs, 1266 &i, slot) || !i) 1267 return; 1268 1269 devs.max_index = i; 1270 devs.devices = kcalloc(i, sizeof(struct vfio_device *), GFP_KERNEL); 1271 if (!devs.devices) 1272 return; 1273 1274 if (vfio_pci_for_each_slot_or_bus(vdev->pdev, 1275 vfio_pci_get_devs, &devs, slot)) 1276 goto put_devs; 1277 1278 for (i = 0; i < devs.cur_index; i++) { 1279 tmp = vfio_device_data(devs.devices[i]); 1280 if (tmp->needs_reset) 1281 needs_reset = true; 1282 if (tmp->refcnt) 1283 goto put_devs; 1284 } 1285 1286 if (needs_reset) 1287 ret = slot ? pci_try_reset_slot(vdev->pdev->slot) : 1288 pci_try_reset_bus(vdev->pdev->bus); 1289 1290 put_devs: 1291 for (i = 0; i < devs.cur_index; i++) { 1292 tmp = vfio_device_data(devs.devices[i]); 1293 if (!ret) 1294 tmp->needs_reset = false; 1295 1296 if (!tmp->refcnt && !disable_idle_d3) 1297 pci_set_power_state(tmp->pdev, PCI_D3hot); 1298 1299 vfio_device_put(devs.devices[i]); 1300 } 1301 1302 kfree(devs.devices); 1303 } 1304 1305 static void __exit vfio_pci_cleanup(void) 1306 { 1307 pci_unregister_driver(&vfio_pci_driver); 1308 vfio_pci_uninit_perm_bits(); 1309 } 1310 1311 static void __init vfio_pci_fill_ids(void) 1312 { 1313 char *p, *id; 1314 int rc; 1315 1316 /* no ids passed actually */ 1317 if (ids[0] == '\0') 1318 return; 1319 1320 /* add ids specified in the module parameter */ 1321 p = ids; 1322 while ((id = strsep(&p, ","))) { 1323 unsigned int vendor, device, subvendor = PCI_ANY_ID, 1324 subdevice = PCI_ANY_ID, class = 0, class_mask = 0; 1325 int fields; 1326 1327 if (!strlen(id)) 1328 continue; 1329 1330 fields = sscanf(id, "%x:%x:%x:%x:%x:%x", 1331 &vendor, &device, &subvendor, &subdevice, 1332 &class, &class_mask); 1333 1334 if (fields < 2) { 1335 pr_warn("invalid id string \"%s\"\n", id); 1336 continue; 1337 } 1338 1339 rc = pci_add_dynid(&vfio_pci_driver, vendor, device, 1340 subvendor, subdevice, class, class_mask, 0); 1341 if (rc) 1342 pr_warn("failed to add dynamic id [%04hx:%04hx[%04hx:%04hx]] class %#08x/%08x (%d)\n", 1343 vendor, device, subvendor, subdevice, 1344 class, class_mask, rc); 1345 else 1346 pr_info("add [%04hx:%04hx[%04hx:%04hx]] class %#08x/%08x\n", 1347 vendor, device, subvendor, subdevice, 1348 class, class_mask); 1349 } 1350 } 1351 1352 static int __init vfio_pci_init(void) 1353 { 1354 int ret; 1355 1356 /* Allocate shared config space permision data used by all devices */ 1357 ret = vfio_pci_init_perm_bits(); 1358 if (ret) 1359 return ret; 1360 1361 /* Register and scan for devices */ 1362 ret = pci_register_driver(&vfio_pci_driver); 1363 if (ret) 1364 goto out_driver; 1365 1366 vfio_pci_fill_ids(); 1367 1368 return 0; 1369 1370 out_driver: 1371 vfio_pci_uninit_perm_bits(); 1372 return ret; 1373 } 1374 1375 module_init(vfio_pci_init); 1376 module_exit(vfio_pci_cleanup); 1377 1378 MODULE_VERSION(DRIVER_VERSION); 1379 MODULE_LICENSE("GPL v2"); 1380 MODULE_AUTHOR(DRIVER_AUTHOR); 1381 MODULE_DESCRIPTION(DRIVER_DESC); 1382