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