drivers/gpu/drm/drm_proc.c

   1 /**
   2  * \file drm_proc.c
   3  * /proc support for DRM
   4  *
   5  * \author Rickard E. (Rik) Faith <faith@valinux.com>
   6  * \author Gareth Hughes <gareth@valinux.com>
   7  *
   8  * \par Acknowledgements:
   9  *    Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
  10  *    the problem with the proc files not outputting all their information.
  11  */
  12
  13 /*
  14  * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
  15  *
  16  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  17  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  18  * All Rights Reserved.
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining a
  21  * copy of this software and associated documentation files (the "Software"),
  22  * to deal in the Software without restriction, including without limitation
  23  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  24  * and/or sell copies of the Software, and to permit persons to whom the
  25  * Software is furnished to do so, subject to the following conditions:
  26  *
  27  * The above copyright notice and this permission notice (including the next
  28  * paragraph) shall be included in all copies or substantial portions of the
  29  * Software.
  30  *
  31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  32  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  33  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  34  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  35  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  36  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  37  * OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #include "drmP.h"
  41
  42 static int drm_name_info(char *buf, char **start, off_t offset,
  43                          int request, int *eof, void *data);
  44 static int drm_vm_info(char *buf, char **start, off_t offset,
  45                        int request, int *eof, void *data);
  46 static int drm_clients_info(char *buf, char **start, off_t offset,
  47                             int request, int *eof, void *data);
  48 static int drm_queues_info(char *buf, char **start, off_t offset,
  49                            int request, int *eof, void *data);
  50 static int drm_bufs_info(char *buf, char **start, off_t offset,
  51                          int request, int *eof, void *data);
  52 static int drm_gem_name_info(char *buf, char **start, off_t offset,
  53                              int request, int *eof, void *data);
  54 static int drm_gem_object_info(char *buf, char **start, off_t offset,
  55                                int request, int *eof, void *data);
  56 #if DRM_DEBUG_CODE
  57 static int drm_vma_info(char *buf, char **start, off_t offset,
  58                         int request, int *eof, void *data);
  59 #endif
  60
  61 /**
  62  * Proc file list.
  63  */
  64 static struct drm_proc_list {
  65         const char *name;       /**< file name */
  66         int (*f) (char *, char **, off_t, int, int *, void *);          /**< proc callback*/
  67         u32 driver_features; /**< Required driver features for this entry */
  68 } drm_proc_list[] = {
  69         {"name", drm_name_info, 0},
  70         {"mem", drm_mem_info, 0},
  71         {"vm", drm_vm_info, 0},
  72         {"clients", drm_clients_info, 0},
  73         {"queues", drm_queues_info, 0},
  74         {"bufs", drm_bufs_info, 0},
  75         {"gem_names", drm_gem_name_info, DRIVER_GEM},
  76         {"gem_objects", drm_gem_object_info, DRIVER_GEM},
  77 #if DRM_DEBUG_CODE
  78         {"vma", drm_vma_info},
  79 #endif
  80 };
  81
  82 #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
  83
  84 /**
  85  * Initialize the DRI proc filesystem for a device.
  86  *
  87  * \param dev DRM device.
  88  * \param minor device minor number.
  89  * \param root DRI proc dir entry.
  90  * \param dev_root resulting DRI device proc dir entry.
  91  * \return root entry pointer on success, or NULL on failure.
  92  *
  93  * Create the DRI proc root entry "/proc/dri", the device proc root entry
  94  * "/proc/dri/%minor%/", and each entry in proc_list as
  95  * "/proc/dri/%minor%/%name%".
  96  */
  97 int drm_proc_init(struct drm_minor *minor, int minor_id,
  98                   struct proc_dir_entry *root)
  99 {
 100         struct drm_device *dev = minor->dev;
 101         struct proc_dir_entry *ent;
 102         int i, j, ret;
 103         char name[64];
 104
 105         sprintf(name, "%d", minor_id);
 106         minor->dev_root = proc_mkdir(name, root);
 107         if (!minor->dev_root) {
 108                 DRM_ERROR("Cannot create /proc/dri/%s\n", name);
 109                 return -1;
 110         }
 111
 112         for (i = 0; i < DRM_PROC_ENTRIES; i++) {
 113                 u32 features = drm_proc_list[i].driver_features;
 114
 115                 if (features != 0 &&
 116                     (dev->driver->driver_features & features) != features)
 117                         continue;
 118
 119                 ent = create_proc_entry(drm_proc_list[i].name,
 120                                         S_IFREG | S_IRUGO, minor->dev_root);
 121                 if (!ent) {
 122                         DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
 123                                   name, drm_proc_list[i].name);
 124                         ret = -1;
 125                         goto fail;
 126                 }
 127                 ent->read_proc = drm_proc_list[i].f;
 128                 ent->data = minor;
 129         }
 130
 131         if (dev->driver->proc_init) {
 132                 ret = dev->driver->proc_init(minor);
 133                 if (ret) {
 134                         DRM_ERROR("DRM: Driver failed to initialize "
 135                                   "/proc/dri.\n");
 136                         goto fail;
 137                 }
 138         }
 139
 140         return 0;
 141  fail:
 142
 143         for (j = 0; j < i; j++)
 144                 remove_proc_entry(drm_proc_list[i].name,
 145                                   minor->dev_root);
 146         remove_proc_entry(name, root);
 147         minor->dev_root = NULL;
 148         return ret;
 149 }
 150
 151 /**
 152  * Cleanup the proc filesystem resources.
 153  *
 154  * \param minor device minor number.
 155  * \param root DRI proc dir entry.
 156  * \param dev_root DRI device proc dir entry.
 157  * \return always zero.
 158  *
 159  * Remove all proc entries created by proc_init().
 160  */
 161 int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root)
 162 {
 163         struct drm_device *dev = minor->dev;
 164         int i;
 165         char name[64];
 166
 167         if (!root || !minor->dev_root)
 168                 return 0;
 169
 170         if (dev->driver->proc_cleanup)
 171                 dev->driver->proc_cleanup(minor);
 172
 173         for (i = 0; i < DRM_PROC_ENTRIES; i++)
 174                 remove_proc_entry(drm_proc_list[i].name, minor->dev_root);
 175         sprintf(name, "%d", minor->index);
 176         remove_proc_entry(name, root);
 177
 178         return 0;
 179 }
 180
 181 /**
 182  * Called when "/proc/dri/.../name" is read.
 183  *
 184  * \param buf output buffer.
 185  * \param start start of output data.
 186  * \param offset requested start offset.
 187  * \param request requested number of bytes.
 188  * \param eof whether there is no more data to return.
 189  * \param data private data.
 190  * \return number of written bytes.
 191  *
 192  * Prints the device name together with the bus id if available.
 193  */
 194 static int drm_name_info(char *buf, char **start, off_t offset, int request,
 195                          int *eof, void *data)
 196 {
 197         struct drm_minor *minor = (struct drm_minor *) data;
 198         struct drm_device *dev = minor->dev;
 199         int len = 0;
 200
 201         if (offset > DRM_PROC_LIMIT) {
 202                 *eof = 1;
 203                 return 0;
 204         }
 205
 206         *start = &buf[offset];
 207         *eof = 0;
 208
 209         if (dev->unique) {
 210                 DRM_PROC_PRINT("%s %s %s\n",
 211                                dev->driver->pci_driver.name,
 212                                pci_name(dev->pdev), dev->unique);
 213         } else {
 214                 DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name,
 215                                pci_name(dev->pdev));
 216         }
 217
 218         if (len > request + offset)
 219                 return request;
 220         *eof = 1;
 221         return len - offset;
 222 }
 223
 224 /**
 225  * Called when "/proc/dri/.../vm" is read.
 226  *
 227  * \param buf output buffer.
 228  * \param start start of output data.
 229  * \param offset requested start offset.
 230  * \param request requested number of bytes.
 231  * \param eof whether there is no more data to return.
 232  * \param data private data.
 233  * \return number of written bytes.
 234  *
 235  * Prints information about all mappings in drm_device::maplist.
 236  */
 237 static int drm__vm_info(char *buf, char **start, off_t offset, int request,
 238                         int *eof, void *data)
 239 {
 240         struct drm_minor *minor = (struct drm_minor *) data;
 241         struct drm_device *dev = minor->dev;
 242         int len = 0;
 243         struct drm_map *map;
 244         struct drm_map_list *r_list;
 245
 246         /* Hardcoded from _DRM_FRAME_BUFFER,
 247            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 248            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 249         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 250         const char *type;
 251         int i;
 252
 253         if (offset > DRM_PROC_LIMIT) {
 254                 *eof = 1;
 255                 return 0;
 256         }
 257
 258         *start = &buf[offset];
 259         *eof = 0;
 260
 261         DRM_PROC_PRINT("slot     offset       size type flags    "
 262                        "address mtrr\n\n");
 263         i = 0;
 264         list_for_each_entry(r_list, &dev->maplist, head) {
 265                 map = r_list->map;
 266                 if (!map)
 267                         continue;
 268                 if (map->type < 0 || map->type > 5)
 269                         type = "??";
 270                 else
 271                         type = types[map->type];
 272                 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 273                                i,
 274                                map->offset,
 275                                map->size, type, map->flags,
 276                                (unsigned long) r_list->user_token);
 277                 if (map->mtrr < 0) {
 278                         DRM_PROC_PRINT("none\n");
 279                 } else {
 280                         DRM_PROC_PRINT("%4d\n", map->mtrr);
 281                 }
 282                 i++;
 283         }
 284
 285         if (len > request + offset)
 286                 return request;
 287         *eof = 1;
 288         return len - offset;
 289 }
 290
 291 /**
 292  * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
 293  */
 294 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
 295                        int *eof, void *data)
 296 {
 297         struct drm_minor *minor = (struct drm_minor *) data;
 298         struct drm_device *dev = minor->dev;
 299         int ret;
 300
 301         mutex_lock(&dev->struct_mutex);
 302         ret = drm__vm_info(buf, start, offset, request, eof, data);
 303         mutex_unlock(&dev->struct_mutex);
 304         return ret;
 305 }
 306
 307 /**
 308  * Called when "/proc/dri/.../queues" is read.
 309  *
 310  * \param buf output buffer.
 311  * \param start start of output data.
 312  * \param offset requested start offset.
 313  * \param request requested number of bytes.
 314  * \param eof whether there is no more data to return.
 315  * \param data private data.
 316  * \return number of written bytes.
 317  */
 318 static int drm__queues_info(char *buf, char **start, off_t offset,
 319                             int request, int *eof, void *data)
 320 {
 321         struct drm_minor *minor = (struct drm_minor *) data;
 322         struct drm_device *dev = minor->dev;
 323         int len = 0;
 324         int i;
 325         struct drm_queue *q;
 326
 327         if (offset > DRM_PROC_LIMIT) {
 328                 *eof = 1;
 329                 return 0;
 330         }
 331
 332         *start = &buf[offset];
 333         *eof = 0;
 334
 335         DRM_PROC_PRINT("  ctx/flags   use   fin"
 336                        "   blk/rw/rwf  wait    flushed     queued"
 337                        "      locks\n\n");
 338         for (i = 0; i < dev->queue_count; i++) {
 339                 q = dev->queuelist[i];
 340                 atomic_inc(&q->use_count);
 341                 DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
 342                                    "%5d/0x%03x %5d %5d"
 343                                    " %5d/%c%c/%c%c%c %5Zd\n",
 344                                    i,
 345                                    q->flags,
 346                                    atomic_read(&q->use_count),
 347                                    atomic_read(&q->finalization),
 348                                    atomic_read(&q->block_count),
 349                                    atomic_read(&q->block_read) ? 'r' : '-',
 350                                    atomic_read(&q->block_write) ? 'w' : '-',
 351                                    waitqueue_active(&q->read_queue) ? 'r' : '-',
 352                                    waitqueue_active(&q->
 353                                                     write_queue) ? 'w' : '-',
 354                                    waitqueue_active(&q->
 355                                                     flush_queue) ? 'f' : '-',
 356                                    DRM_BUFCOUNT(&q->waitlist));
 357                 atomic_dec(&q->use_count);
 358         }
 359
 360         if (len > request + offset)
 361                 return request;
 362         *eof = 1;
 363         return len - offset;
 364 }
 365
 366 /**
 367  * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
 368  */
 369 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
 370                            int *eof, void *data)
 371 {
 372         struct drm_minor *minor = (struct drm_minor *) data;
 373         struct drm_device *dev = minor->dev;
 374         int ret;
 375
 376         mutex_lock(&dev->struct_mutex);
 377         ret = drm__queues_info(buf, start, offset, request, eof, data);
 378         mutex_unlock(&dev->struct_mutex);
 379         return ret;
 380 }
 381
 382 /**
 383  * Called when "/proc/dri/.../bufs" is read.
 384  *
 385  * \param buf output buffer.
 386  * \param start start of output data.
 387  * \param offset requested start offset.
 388  * \param request requested number of bytes.
 389  * \param eof whether there is no more data to return.
 390  * \param data private data.
 391  * \return number of written bytes.
 392  */
 393 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
 394                           int *eof, void *data)
 395 {
 396         struct drm_minor *minor = (struct drm_minor *) data;
 397         struct drm_device *dev = minor->dev;
 398         int len = 0;
 399         struct drm_device_dma *dma = dev->dma;
 400         int i;
 401
 402         if (!dma || offset > DRM_PROC_LIMIT) {
 403                 *eof = 1;
 404                 return 0;
 405         }
 406
 407         *start = &buf[offset];
 408         *eof = 0;
 409
 410         DRM_PROC_PRINT(" o     size count  free  segs pages    kB\n\n");
 411         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 412                 if (dma->bufs[i].buf_count)
 413                         DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
 414                                        i,
 415                                        dma->bufs[i].buf_size,
 416                                        dma->bufs[i].buf_count,
 417                                        atomic_read(&dma->bufs[i]
 418                                                    .freelist.count),
 419                                        dma->bufs[i].seg_count,
 420                                        dma->bufs[i].seg_count
 421                                        * (1 << dma->bufs[i].page_order),
 422                                        (dma->bufs[i].seg_count
 423                                         * (1 << dma->bufs[i].page_order))
 424                                        * PAGE_SIZE / 1024);
 425         }
 426         DRM_PROC_PRINT("\n");
 427         for (i = 0; i < dma->buf_count; i++) {
 428                 if (i && !(i % 32))
 429                         DRM_PROC_PRINT("\n");
 430                 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
 431         }
 432         DRM_PROC_PRINT("\n");
 433
 434         if (len > request + offset)
 435                 return request;
 436         *eof = 1;
 437         return len - offset;
 438 }
 439
 440 /**
 441  * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
 442  */
 443 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
 444                          int *eof, void *data)
 445 {
 446         struct drm_minor *minor = (struct drm_minor *) data;
 447         struct drm_device *dev = minor->dev;
 448         int ret;
 449
 450         mutex_lock(&dev->struct_mutex);
 451         ret = drm__bufs_info(buf, start, offset, request, eof, data);
 452         mutex_unlock(&dev->struct_mutex);
 453         return ret;
 454 }
 455
 456 /**
 457  * Called when "/proc/dri/.../clients" is read.
 458  *
 459  * \param buf output buffer.
 460  * \param start start of output data.
 461  * \param offset requested start offset.
 462  * \param request requested number of bytes.
 463  * \param eof whether there is no more data to return.
 464  * \param data private data.
 465  * \return number of written bytes.
 466  */
 467 static int drm__clients_info(char *buf, char **start, off_t offset,
 468                              int request, int *eof, void *data)
 469 {
 470         struct drm_minor *minor = (struct drm_minor *) data;
 471         struct drm_device *dev = minor->dev;
 472         int len = 0;
 473         struct drm_file *priv;
 474
 475         if (offset > DRM_PROC_LIMIT) {
 476                 *eof = 1;
 477                 return 0;
 478         }
 479
 480         *start = &buf[offset];
 481         *eof = 0;
 482
 483         DRM_PROC_PRINT("a dev   pid    uid      magic     ioctls\n\n");
 484         list_for_each_entry(priv, &dev->filelist, lhead) {
 485                 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
 486                                priv->authenticated ? 'y' : 'n',
 487                                priv->minor->index,
 488                                priv->pid,
 489                                priv->uid, priv->magic, priv->ioctl_count);
 490         }
 491
 492         if (len > request + offset)
 493                 return request;
 494         *eof = 1;
 495         return len - offset;
 496 }
 497
 498 /**
 499  * Simply calls _clients_info() while holding the drm_device::struct_mutex lock.
 500  */
 501 static int drm_clients_info(char *buf, char **start, off_t offset,
 502                             int request, int *eof, void *data)
 503 {
 504         struct drm_minor *minor = (struct drm_minor *) data;
 505         struct drm_device *dev = minor->dev;
 506         int ret;
 507
 508         mutex_lock(&dev->struct_mutex);
 509         ret = drm__clients_info(buf, start, offset, request, eof, data);
 510         mutex_unlock(&dev->struct_mutex);
 511         return ret;
 512 }
 513
 514 struct drm_gem_name_info_data {
 515        int                     len;
 516        char                    *buf;
 517        int                     eof;
 518 };
 519
 520 static int drm_gem_one_name_info(int id, void *ptr, void *data)
 521 {
 522         struct drm_gem_object *obj = ptr;
 523         struct drm_gem_name_info_data   *nid = data;
 524
 525         DRM_INFO("name %d size %zd\n", obj->name, obj->size);
 526         if (nid->eof)
 527                 return 0;
 528
 529         nid->len += sprintf(&nid->buf[nid->len],
 530                             "%6d %8zd %7d %8d\n",
 531                             obj->name, obj->size,
 532                             atomic_read(&obj->handlecount.refcount),
 533                             atomic_read(&obj->refcount.refcount));
 534         if (nid->len > DRM_PROC_LIMIT) {
 535                 nid->eof = 1;
 536                 return 0;
 537         }
 538         return 0;
 539 }
 540
 541 static int drm_gem_name_info(char *buf, char **start, off_t offset,
 542                              int request, int *eof, void *data)
 543 {
 544         struct drm_minor *minor = (struct drm_minor *) data;
 545         struct drm_device *dev = minor->dev;
 546         struct drm_gem_name_info_data nid;
 547
 548         if (offset > DRM_PROC_LIMIT) {
 549                 *eof = 1;
 550                 return 0;
 551         }
 552
 553         nid.len = sprintf(buf, "  name     size handles refcount\n");
 554         nid.buf = buf;
 555         nid.eof = 0;
 556         idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, &nid);
 557
 558         *start = &buf[offset];
 559         *eof = 0;
 560         if (nid.len > request + offset)
 561                 return request;
 562         *eof = 1;
 563         return nid.len - offset;
 564 }
 565
 566 static int drm_gem_object_info(char *buf, char **start, off_t offset,
 567                                int request, int *eof, void *data)
 568 {
 569         struct drm_minor *minor = (struct drm_minor *) data;
 570         struct drm_device *dev = minor->dev;
 571         int len = 0;
 572
 573         if (offset > DRM_PROC_LIMIT) {
 574                 *eof = 1;
 575                 return 0;
 576         }
 577
 578         *start = &buf[offset];
 579         *eof = 0;
 580         DRM_PROC_PRINT("%d objects\n", atomic_read(&dev->object_count));
 581         DRM_PROC_PRINT("%d object bytes\n", atomic_read(&dev->object_memory));
 582         DRM_PROC_PRINT("%d pinned\n", atomic_read(&dev->pin_count));
 583         DRM_PROC_PRINT("%d pin bytes\n", atomic_read(&dev->pin_memory));
 584         DRM_PROC_PRINT("%d gtt bytes\n", atomic_read(&dev->gtt_memory));
 585         DRM_PROC_PRINT("%d gtt total\n", dev->gtt_total);
 586         if (len > request + offset)
 587                 return request;
 588         *eof = 1;
 589         return len - offset;
 590 }
 591
 592 #if DRM_DEBUG_CODE
 593
 594 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
 595                          int *eof, void *data)
 596 {
 597         struct drm_minor *minor = (struct drm_minor *) data;
 598         struct drm_device *dev = minor->dev;
 599         int len = 0;
 600         struct drm_vma_entry *pt;
 601         struct vm_area_struct *vma;
 602 #if defined(__i386__)
 603         unsigned int pgprot;
 604 #endif
 605
 606         if (offset > DRM_PROC_LIMIT) {
 607                 *eof = 1;
 608                 return 0;
 609         }
 610
 611         *start = &buf[offset];
 612         *eof = 0;
 613
 614         DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
 615                        atomic_read(&dev->vma_count),
 616                        high_memory, virt_to_phys(high_memory));
 617         list_for_each_entry(pt, &dev->vmalist, head) {
 618                 if (!(vma = pt->vma))
 619                         continue;
 620                 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
 621                                pt->pid,
 622                                vma->vm_start,
 623                                vma->vm_end,
 624                                vma->vm_flags & VM_READ ? 'r' : '-',
 625                                vma->vm_flags & VM_WRITE ? 'w' : '-',
 626                                vma->vm_flags & VM_EXEC ? 'x' : '-',
 627                                vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 628                                vma->vm_flags & VM_LOCKED ? 'l' : '-',
 629                                vma->vm_flags & VM_IO ? 'i' : '-',
 630                                vma->vm_pgoff);
 631
 632 #if defined(__i386__)
 633                 pgprot = pgprot_val(vma->vm_page_prot);
 634                 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
 635                                pgprot & _PAGE_PRESENT ? 'p' : '-',
 636                                pgprot & _PAGE_RW ? 'w' : 'r',
 637                                pgprot & _PAGE_USER ? 'u' : 's',
 638                                pgprot & _PAGE_PWT ? 't' : 'b',
 639                                pgprot & _PAGE_PCD ? 'u' : 'c',
 640                                pgprot & _PAGE_ACCESSED ? 'a' : '-',
 641                                pgprot & _PAGE_DIRTY ? 'd' : '-',
 642                                pgprot & _PAGE_PSE ? 'm' : 'k',
 643                                pgprot & _PAGE_GLOBAL ? 'g' : 'l');
 644 #endif
 645                 DRM_PROC_PRINT("\n");
 646         }
 647
 648         if (len > request + offset)
 649                 return request;
 650         *eof = 1;
 651         return len - offset;
 652 }
 653
 654 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
 655                         int *eof, void *data)
 656 {
 657         struct drm_minor *minor = (struct drm_minor *) data;
 658         struct drm_device *dev = minor->dev;
 659         int ret;
 660
 661         mutex_lock(&dev->struct_mutex);
 662         ret = drm__vma_info(buf, start, offset, request, eof, data);
 663         mutex_unlock(&dev->struct_mutex);
 664         return ret;
 665 }
 666 #endif