1/** 2 * \file drm_vm.c 3 * Memory mapping for DRM 4 * 5 * \author Rickard E. (Rik) Faith <faith@valinux.com> 6 * \author Gareth Hughes <gareth@valinux.com> 7 */ 8 9/* 10 * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com 11 * 12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 14 * All Rights Reserved. 15 * 16 * Permission is hereby granted, free of charge, to any person obtaining a 17 * copy of this software and associated documentation files (the "Software"), 18 * to deal in the Software without restriction, including without limitation 19 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 20 * and/or sell copies of the Software, and to permit persons to whom the 21 * Software is furnished to do so, subject to the following conditions: 22 * 23 * The above copyright notice and this permission notice (including the next 24 * paragraph) shall be included in all copies or substantial portions of the 25 * Software. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 33 * OTHER DEALINGS IN THE SOFTWARE. 34 */ 35 36#include <drm/drmP.h> 37#include <linux/export.h> 38#include <linux/seq_file.h> 39#if defined(__ia64__) 40#include <linux/efi.h> 41#include <linux/slab.h> 42#endif 43#include <asm/pgtable.h> 44#include "drm_internal.h" 45#include "drm_legacy.h" 46 47struct drm_vma_entry { 48 struct list_head head; 49 struct vm_area_struct *vma; 50 pid_t pid; 51}; 52 53static void drm_vm_open(struct vm_area_struct *vma); 54static void drm_vm_close(struct vm_area_struct *vma); 55 56static pgprot_t drm_io_prot(struct drm_local_map *map, 57 struct vm_area_struct *vma) 58{ 59 pgprot_t tmp = vm_get_page_prot(vma->vm_flags); 60 61#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) 62 if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING)) 63 tmp = pgprot_noncached(tmp); 64 else 65 tmp = pgprot_writecombine(tmp); 66#elif defined(__ia64__) 67 if (efi_range_is_wc(vma->vm_start, vma->vm_end - 68 vma->vm_start)) 69 tmp = pgprot_writecombine(tmp); 70 else 71 tmp = pgprot_noncached(tmp); 72#elif defined(__sparc__) || defined(__arm__) || defined(__mips__) 73 tmp = pgprot_noncached(tmp); 74#endif 75 return tmp; 76} 77 78static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) 79{ 80 pgprot_t tmp = vm_get_page_prot(vma->vm_flags); 81 82#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) 83 tmp |= _PAGE_NO_CACHE; 84#endif 85 return tmp; 86} 87 88/** 89 * \c fault method for AGP virtual memory. 90 * 91 * \param vma virtual memory area. 92 * \param address access address. 93 * \return pointer to the page structure. 94 * 95 * Find the right map and if it's AGP memory find the real physical page to 96 * map, get the page, increment the use count and return it. 97 */ 98#if __OS_HAS_AGP 99static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 100{ 101 struct drm_file *priv = vma->vm_file->private_data; 102 struct drm_device *dev = priv->minor->dev; 103 struct drm_local_map *map = NULL; 104 struct drm_map_list *r_list; 105 struct drm_hash_item *hash; 106 107 /* 108 * Find the right map 109 */ 110 if (!dev->agp) 111 goto vm_fault_error; 112 113 if (!dev->agp || !dev->agp->cant_use_aperture) 114 goto vm_fault_error; 115 116 if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) 117 goto vm_fault_error; 118 119 r_list = drm_hash_entry(hash, struct drm_map_list, hash); 120 map = r_list->map; 121 122 if (map && map->type == _DRM_AGP) { 123 /* 124 * Using vm_pgoff as a selector forces us to use this unusual 125 * addressing scheme. 126 */ 127 resource_size_t offset = (unsigned long)vmf->virtual_address - 128 vma->vm_start; 129 resource_size_t baddr = map->offset + offset; 130 struct drm_agp_mem *agpmem; 131 struct page *page; 132 133#ifdef __alpha__ 134 /* 135 * Adjust to a bus-relative address 136 */ 137 baddr -= dev->hose->mem_space->start; 138#endif 139 140 /* 141 * It's AGP memory - find the real physical page to map 142 */ 143 list_for_each_entry(agpmem, &dev->agp->memory, head) { 144 if (agpmem->bound <= baddr && 145 agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) 146 break; 147 } 148 149 if (&agpmem->head == &dev->agp->memory) 150 goto vm_fault_error; 151 152 /* 153 * Get the page, inc the use count, and return it 154 */ 155 offset = (baddr - agpmem->bound) >> PAGE_SHIFT; 156 page = agpmem->memory->pages[offset]; 157 get_page(page); 158 vmf->page = page; 159 160 DRM_DEBUG 161 ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", 162 (unsigned long long)baddr, 163 agpmem->memory->pages[offset], 164 (unsigned long long)offset, 165 page_count(page)); 166 return 0; 167 } 168vm_fault_error: 169 return VM_FAULT_SIGBUS; /* Disallow mremap */ 170} 171#else /* __OS_HAS_AGP */ 172static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 173{ 174 return VM_FAULT_SIGBUS; 175} 176#endif /* __OS_HAS_AGP */ 177 178/** 179 * \c nopage method for shared virtual memory. 180 * 181 * \param vma virtual memory area. 182 * \param address access address. 183 * \return pointer to the page structure. 184 * 185 * Get the mapping, find the real physical page to map, get the page, and 186 * return it. 187 */ 188static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 189{ 190 struct drm_local_map *map = vma->vm_private_data; 191 unsigned long offset; 192 unsigned long i; 193 struct page *page; 194 195 if (!map) 196 return VM_FAULT_SIGBUS; /* Nothing allocated */ 197 198 offset = (unsigned long)vmf->virtual_address - vma->vm_start; 199 i = (unsigned long)map->handle + offset; 200 page = vmalloc_to_page((void *)i); 201 if (!page) 202 return VM_FAULT_SIGBUS; 203 get_page(page); 204 vmf->page = page; 205 206 DRM_DEBUG("shm_fault 0x%lx\n", offset); 207 return 0; 208} 209 210/** 211 * \c close method for shared virtual memory. 212 * 213 * \param vma virtual memory area. 214 * 215 * Deletes map information if we are the last 216 * person to close a mapping and it's not in the global maplist. 217 */ 218static void drm_vm_shm_close(struct vm_area_struct *vma) 219{ 220 struct drm_file *priv = vma->vm_file->private_data; 221 struct drm_device *dev = priv->minor->dev; 222 struct drm_vma_entry *pt, *temp; 223 struct drm_local_map *map; 224 struct drm_map_list *r_list; 225 int found_maps = 0; 226 227 DRM_DEBUG("0x%08lx,0x%08lx\n", 228 vma->vm_start, vma->vm_end - vma->vm_start); 229 230 map = vma->vm_private_data; 231 232 mutex_lock(&dev->struct_mutex); 233 list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { 234 if (pt->vma->vm_private_data == map) 235 found_maps++; 236 if (pt->vma == vma) { 237 list_del(&pt->head); 238 kfree(pt); 239 } 240 } 241 242 /* We were the only map that was found */ 243 if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { 244 /* Check to see if we are in the maplist, if we are not, then 245 * we delete this mappings information. 246 */ 247 found_maps = 0; 248 list_for_each_entry(r_list, &dev->maplist, head) { 249 if (r_list->map == map) 250 found_maps++; 251 } 252 253 if (!found_maps) { 254 drm_dma_handle_t dmah; 255 256 switch (map->type) { 257 case _DRM_REGISTERS: 258 case _DRM_FRAME_BUFFER: 259 arch_phys_wc_del(map->mtrr); 260 iounmap(map->handle); 261 break; 262 case _DRM_SHM: 263 vfree(map->handle); 264 break; 265 case _DRM_AGP: 266 case _DRM_SCATTER_GATHER: 267 break; 268 case _DRM_CONSISTENT: 269 dmah.vaddr = map->handle; 270 dmah.busaddr = map->offset; 271 dmah.size = map->size; 272 __drm_legacy_pci_free(dev, &dmah); 273 break; 274 } 275 kfree(map); 276 } 277 } 278 mutex_unlock(&dev->struct_mutex); 279} 280 281/** 282 * \c fault method for DMA virtual memory. 283 * 284 * \param vma virtual memory area. 285 * \param address access address. 286 * \return pointer to the page structure. 287 * 288 * Determine the page number from the page offset and get it from drm_device_dma::pagelist. 289 */ 290static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 291{ 292 struct drm_file *priv = vma->vm_file->private_data; 293 struct drm_device *dev = priv->minor->dev; 294 struct drm_device_dma *dma = dev->dma; 295 unsigned long offset; 296 unsigned long page_nr; 297 struct page *page; 298 299 if (!dma) 300 return VM_FAULT_SIGBUS; /* Error */ 301 if (!dma->pagelist) 302 return VM_FAULT_SIGBUS; /* Nothing allocated */ 303 304 offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ 305 page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ 306 page = virt_to_page((void *)dma->pagelist[page_nr]); 307 308 get_page(page); 309 vmf->page = page; 310 311 DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); 312 return 0; 313} 314 315/** 316 * \c fault method for scatter-gather virtual memory. 317 * 318 * \param vma virtual memory area. 319 * \param address access address. 320 * \return pointer to the page structure. 321 * 322 * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. 323 */ 324static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 325{ 326 struct drm_local_map *map = vma->vm_private_data; 327 struct drm_file *priv = vma->vm_file->private_data; 328 struct drm_device *dev = priv->minor->dev; 329 struct drm_sg_mem *entry = dev->sg; 330 unsigned long offset; 331 unsigned long map_offset; 332 unsigned long page_offset; 333 struct page *page; 334 335 if (!entry) 336 return VM_FAULT_SIGBUS; /* Error */ 337 if (!entry->pagelist) 338 return VM_FAULT_SIGBUS; /* Nothing allocated */ 339 340 offset = (unsigned long)vmf->virtual_address - vma->vm_start; 341 map_offset = map->offset - (unsigned long)dev->sg->virtual; 342 page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); 343 page = entry->pagelist[page_offset]; 344 get_page(page); 345 vmf->page = page; 346 347 return 0; 348} 349 350static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 351{ 352 return drm_do_vm_fault(vma, vmf); 353} 354 355static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 356{ 357 return drm_do_vm_shm_fault(vma, vmf); 358} 359 360static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 361{ 362 return drm_do_vm_dma_fault(vma, vmf); 363} 364 365static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 366{ 367 return drm_do_vm_sg_fault(vma, vmf); 368} 369 370/** AGP virtual memory operations */ 371static const struct vm_operations_struct drm_vm_ops = { 372 .fault = drm_vm_fault, 373 .open = drm_vm_open, 374 .close = drm_vm_close, 375}; 376 377/** Shared virtual memory operations */ 378static const struct vm_operations_struct drm_vm_shm_ops = { 379 .fault = drm_vm_shm_fault, 380 .open = drm_vm_open, 381 .close = drm_vm_shm_close, 382}; 383 384/** DMA virtual memory operations */ 385static const struct vm_operations_struct drm_vm_dma_ops = { 386 .fault = drm_vm_dma_fault, 387 .open = drm_vm_open, 388 .close = drm_vm_close, 389}; 390 391/** Scatter-gather virtual memory operations */ 392static const struct vm_operations_struct drm_vm_sg_ops = { 393 .fault = drm_vm_sg_fault, 394 .open = drm_vm_open, 395 .close = drm_vm_close, 396}; 397 398/** 399 * \c open method for shared virtual memory. 400 * 401 * \param vma virtual memory area. 402 * 403 * Create a new drm_vma_entry structure as the \p vma private data entry and 404 * add it to drm_device::vmalist. 405 */ 406void drm_vm_open_locked(struct drm_device *dev, 407 struct vm_area_struct *vma) 408{ 409 struct drm_vma_entry *vma_entry; 410 411 DRM_DEBUG("0x%08lx,0x%08lx\n", 412 vma->vm_start, vma->vm_end - vma->vm_start); 413 414 vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); 415 if (vma_entry) { 416 vma_entry->vma = vma; 417 vma_entry->pid = current->pid; 418 list_add(&vma_entry->head, &dev->vmalist); 419 } 420} 421 422static void drm_vm_open(struct vm_area_struct *vma) 423{ 424 struct drm_file *priv = vma->vm_file->private_data; 425 struct drm_device *dev = priv->minor->dev; 426 427 mutex_lock(&dev->struct_mutex); 428 drm_vm_open_locked(dev, vma); 429 mutex_unlock(&dev->struct_mutex); 430} 431 432void drm_vm_close_locked(struct drm_device *dev, 433 struct vm_area_struct *vma) 434{ 435 struct drm_vma_entry *pt, *temp; 436 437 DRM_DEBUG("0x%08lx,0x%08lx\n", 438 vma->vm_start, vma->vm_end - vma->vm_start); 439 440 list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { 441 if (pt->vma == vma) { 442 list_del(&pt->head); 443 kfree(pt); 444 break; 445 } 446 } 447} 448 449/** 450 * \c close method for all virtual memory types. 451 * 452 * \param vma virtual memory area. 453 * 454 * Search the \p vma private data entry in drm_device::vmalist, unlink it, and 455 * free it. 456 */ 457static void drm_vm_close(struct vm_area_struct *vma) 458{ 459 struct drm_file *priv = vma->vm_file->private_data; 460 struct drm_device *dev = priv->minor->dev; 461 462 mutex_lock(&dev->struct_mutex); 463 drm_vm_close_locked(dev, vma); 464 mutex_unlock(&dev->struct_mutex); 465} 466 467/** 468 * mmap DMA memory. 469 * 470 * \param file_priv DRM file private. 471 * \param vma virtual memory area. 472 * \return zero on success or a negative number on failure. 473 * 474 * Sets the virtual memory area operations structure to vm_dma_ops, the file 475 * pointer, and calls vm_open(). 476 */ 477static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) 478{ 479 struct drm_file *priv = filp->private_data; 480 struct drm_device *dev; 481 struct drm_device_dma *dma; 482 unsigned long length = vma->vm_end - vma->vm_start; 483 484 dev = priv->minor->dev; 485 dma = dev->dma; 486 DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", 487 vma->vm_start, vma->vm_end, vma->vm_pgoff); 488 489 /* Length must match exact page count */ 490 if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { 491 return -EINVAL; 492 } 493 494 if (!capable(CAP_SYS_ADMIN) && 495 (dma->flags & _DRM_DMA_USE_PCI_RO)) { 496 vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); 497#if defined(__i386__) || defined(__x86_64__) 498 pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; 499#else 500 /* Ye gads this is ugly. With more thought 501 we could move this up higher and use 502 `protection_map' instead. */ 503 vma->vm_page_prot = 504 __pgprot(pte_val 505 (pte_wrprotect 506 (__pte(pgprot_val(vma->vm_page_prot))))); 507#endif 508 } 509 510 vma->vm_ops = &drm_vm_dma_ops; 511 512 vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 513 514 drm_vm_open_locked(dev, vma); 515 return 0; 516} 517 518static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) 519{ 520#ifdef __alpha__ 521 return dev->hose->dense_mem_base; 522#else 523 return 0; 524#endif 525} 526 527/** 528 * mmap DMA memory. 529 * 530 * \param file_priv DRM file private. 531 * \param vma virtual memory area. 532 * \return zero on success or a negative number on failure. 533 * 534 * If the virtual memory area has no offset associated with it then it's a DMA 535 * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, 536 * checks that the restricted flag is not set, sets the virtual memory operations 537 * according to the mapping type and remaps the pages. Finally sets the file 538 * pointer and calls vm_open(). 539 */ 540static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) 541{ 542 struct drm_file *priv = filp->private_data; 543 struct drm_device *dev = priv->minor->dev; 544 struct drm_local_map *map = NULL; 545 resource_size_t offset = 0; 546 struct drm_hash_item *hash; 547 548 DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", 549 vma->vm_start, vma->vm_end, vma->vm_pgoff); 550 551 if (!priv->authenticated) 552 return -EACCES; 553 554 /* We check for "dma". On Apple's UniNorth, it's valid to have 555 * the AGP mapped at physical address 0 556 * --BenH. 557 */ 558 if (!vma->vm_pgoff 559#if __OS_HAS_AGP 560 && (!dev->agp 561 || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) 562#endif 563 ) 564 return drm_mmap_dma(filp, vma); 565 566 if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { 567 DRM_ERROR("Could not find map\n"); 568 return -EINVAL; 569 } 570 571 map = drm_hash_entry(hash, struct drm_map_list, hash)->map; 572 if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) 573 return -EPERM; 574 575 /* Check for valid size. */ 576 if (map->size < vma->vm_end - vma->vm_start) 577 return -EINVAL; 578 579 if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { 580 vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); 581#if defined(__i386__) || defined(__x86_64__) 582 pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; 583#else 584 /* Ye gads this is ugly. With more thought 585 we could move this up higher and use 586 `protection_map' instead. */ 587 vma->vm_page_prot = 588 __pgprot(pte_val 589 (pte_wrprotect 590 (__pte(pgprot_val(vma->vm_page_prot))))); 591#endif 592 } 593 594 switch (map->type) { 595#if !defined(__arm__) 596 case _DRM_AGP: 597 if (dev->agp && dev->agp->cant_use_aperture) { 598 /* 599 * On some platforms we can't talk to bus dma address from the CPU, so for 600 * memory of type DRM_AGP, we'll deal with sorting out the real physical 601 * pages and mappings in fault() 602 */ 603#if defined(__powerpc__) 604 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; 605#endif 606 vma->vm_ops = &drm_vm_ops; 607 break; 608 } 609 /* fall through to _DRM_FRAME_BUFFER... */ 610#endif 611 case _DRM_FRAME_BUFFER: 612 case _DRM_REGISTERS: 613 offset = drm_core_get_reg_ofs(dev); 614 vma->vm_page_prot = drm_io_prot(map, vma); 615 if (io_remap_pfn_range(vma, vma->vm_start, 616 (map->offset + offset) >> PAGE_SHIFT, 617 vma->vm_end - vma->vm_start, 618 vma->vm_page_prot)) 619 return -EAGAIN; 620 DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," 621 " offset = 0x%llx\n", 622 map->type, 623 vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); 624 625 vma->vm_ops = &drm_vm_ops; 626 break; 627 case _DRM_CONSISTENT: 628 /* Consistent memory is really like shared memory. But 629 * it's allocated in a different way, so avoid fault */ 630 if (remap_pfn_range(vma, vma->vm_start, 631 page_to_pfn(virt_to_page(map->handle)), 632 vma->vm_end - vma->vm_start, vma->vm_page_prot)) 633 return -EAGAIN; 634 vma->vm_page_prot = drm_dma_prot(map->type, vma); 635 /* fall through to _DRM_SHM */ 636 case _DRM_SHM: 637 vma->vm_ops = &drm_vm_shm_ops; 638 vma->vm_private_data = (void *)map; 639 break; 640 case _DRM_SCATTER_GATHER: 641 vma->vm_ops = &drm_vm_sg_ops; 642 vma->vm_private_data = (void *)map; 643 vma->vm_page_prot = drm_dma_prot(map->type, vma); 644 break; 645 default: 646 return -EINVAL; /* This should never happen. */ 647 } 648 vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 649 650 drm_vm_open_locked(dev, vma); 651 return 0; 652} 653 654int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma) 655{ 656 struct drm_file *priv = filp->private_data; 657 struct drm_device *dev = priv->minor->dev; 658 int ret; 659 660 if (drm_device_is_unplugged(dev)) 661 return -ENODEV; 662 663 mutex_lock(&dev->struct_mutex); 664 ret = drm_mmap_locked(filp, vma); 665 mutex_unlock(&dev->struct_mutex); 666 667 return ret; 668} 669EXPORT_SYMBOL(drm_legacy_mmap); 670 671void drm_legacy_vma_flush(struct drm_device *dev) 672{ 673 struct drm_vma_entry *vma, *vma_temp; 674 675 /* Clear vma list (only needed for legacy drivers) */ 676 list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { 677 list_del(&vma->head); 678 kfree(vma); 679 } 680} 681 682int drm_vma_info(struct seq_file *m, void *data) 683{ 684 struct drm_info_node *node = (struct drm_info_node *) m->private; 685 struct drm_device *dev = node->minor->dev; 686 struct drm_vma_entry *pt; 687 struct vm_area_struct *vma; 688 unsigned long vma_count = 0; 689#if defined(__i386__) 690 unsigned int pgprot; 691#endif 692 693 mutex_lock(&dev->struct_mutex); 694 list_for_each_entry(pt, &dev->vmalist, head) 695 vma_count++; 696 697 seq_printf(m, "vma use count: %lu, high_memory = %pK, 0x%pK\n", 698 vma_count, high_memory, 699 (void *)(unsigned long)virt_to_phys(high_memory)); 700 701 list_for_each_entry(pt, &dev->vmalist, head) { 702 vma = pt->vma; 703 if (!vma) 704 continue; 705 seq_printf(m, 706 "\n%5d 0x%pK-0x%pK %c%c%c%c%c%c 0x%08lx000", 707 pt->pid, 708 (void *)vma->vm_start, (void *)vma->vm_end, 709 vma->vm_flags & VM_READ ? 'r' : '-', 710 vma->vm_flags & VM_WRITE ? 'w' : '-', 711 vma->vm_flags & VM_EXEC ? 'x' : '-', 712 vma->vm_flags & VM_MAYSHARE ? 's' : 'p', 713 vma->vm_flags & VM_LOCKED ? 'l' : '-', 714 vma->vm_flags & VM_IO ? 'i' : '-', 715 vma->vm_pgoff); 716 717#if defined(__i386__) 718 pgprot = pgprot_val(vma->vm_page_prot); 719 seq_printf(m, " %c%c%c%c%c%c%c%c%c", 720 pgprot & _PAGE_PRESENT ? 'p' : '-', 721 pgprot & _PAGE_RW ? 'w' : 'r', 722 pgprot & _PAGE_USER ? 'u' : 's', 723 pgprot & _PAGE_PWT ? 't' : 'b', 724 pgprot & _PAGE_PCD ? 'u' : 'c', 725 pgprot & _PAGE_ACCESSED ? 'a' : '-', 726 pgprot & _PAGE_DIRTY ? 'd' : '-', 727 pgprot & _PAGE_PSE ? 'm' : 'k', 728 pgprot & _PAGE_GLOBAL ? 'g' : 'l'); 729#endif 730 seq_printf(m, "\n"); 731 } 732 mutex_unlock(&dev->struct_mutex); 733 return 0; 734} 735