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_vblank_info(char *buf, char **start, off_t offset,
  53                            int request, int *eof, void *data);
  54 static int drm_gem_name_info(char *buf, char **start, off_t offset,
  55                              int request, int *eof, void *data);
  56 static int drm_gem_object_info(char *buf, char **start, off_t offset,
  57                                int request, int *eof, void *data);
  58 #if DRM_DEBUG_CODE
  59 static int drm_vma_info(char *buf, char **start, off_t offset,
  60                         int request, int *eof, void *data);
  61 #endif
  62
  63 /**
  64  * Proc file list.
  65  */
  66 static struct drm_proc_list {
  67         const char *name;       /**< file name */
  68         int (*f) (char *, char **, off_t, int, int *, void *);          /**< proc callback*/
  69         u32 driver_features; /**< Required driver features for this entry */
  70 } drm_proc_list[] = {
  71         {"name", drm_name_info, 0},
  72         {"mem", drm_mem_info, 0},
  73         {"vm", drm_vm_info, 0},
  74         {"clients", drm_clients_info, 0},
  75         {"queues", drm_queues_info, 0},
  76         {"bufs", drm_bufs_info, 0},
  77         {"vblank", drm_vblank_info, 0},
  78         {"gem_names", drm_gem_name_info, DRIVER_GEM},
  79         {"gem_objects", drm_gem_object_info, DRIVER_GEM},
  80 #if DRM_DEBUG_CODE
  81         {"vma", drm_vma_info},
  82 #endif
  83 };
  84
  85 #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
  86
  87 /**
  88  * Initialize the DRI proc filesystem for a device.
  89  *
  90  * \param dev DRM device.
  91  * \param minor device minor number.
  92  * \param root DRI proc dir entry.
  93  * \param dev_root resulting DRI device proc dir entry.
  94  * \return root entry pointer on success, or NULL on failure.
  95  *
  96  * Create the DRI proc root entry "/proc/dri", the device proc root entry
  97  * "/proc/dri/%minor%/", and each entry in proc_list as
  98  * "/proc/dri/%minor%/%name%".
  99  */
 100 int drm_proc_init(struct drm_minor *minor, int minor_id,
 101                   struct proc_dir_entry *root)
 102 {
 103         struct drm_device *dev = minor->dev;
 104         struct proc_dir_entry *ent;
 105         int i, j, ret;
 106         char name[64];
 107
 108         sprintf(name, "%d", minor_id);
 109         minor->dev_root = proc_mkdir(name, root);
 110         if (!minor->dev_root) {
 111                 DRM_ERROR("Cannot create /proc/dri/%s\n", name);
 112                 return -1;
 113         }
 114
 115         for (i = 0; i < DRM_PROC_ENTRIES; i++) {
 116                 u32 features = drm_proc_list[i].driver_features;
 117
 118                 if (features != 0 &&
 119                     (dev->driver->driver_features & features) != features)
 120                         continue;
 121
 122                 ent = create_proc_entry(drm_proc_list[i].name,
 123                                         S_IFREG | S_IRUGO, minor->dev_root);
 124                 if (!ent) {
 125                         DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
 126                                   name, drm_proc_list[i].name);
 127                         ret = -1;
 128                         goto fail;
 129                 }
 130                 ent->read_proc = drm_proc_list[i].f;
 131                 ent->data = minor;
 132         }
 133
 134         if (dev->driver->proc_init) {
 135                 ret = dev->driver->proc_init(minor);
 136                 if (ret) {
 137                         DRM_ERROR("DRM: Driver failed to initialize "
 138                                   "/proc/dri.\n");
 139                         goto fail;
 140                 }
 141         }
 142
 143         return 0;
 144  fail:
 145
 146         for (j = 0; j < i; j++)
 147                 remove_proc_entry(drm_proc_list[i].name,
 148                                   minor->dev_root);
 149         remove_proc_entry(name, root);
 150         minor->dev_root = NULL;
 151         return ret;
 152 }
 153
 154 /**
 155  * Cleanup the proc filesystem resources.
 156  *
 157  * \param minor device minor number.
 158  * \param root DRI proc dir entry.
 159  * \param dev_root DRI device proc dir entry.
 160  * \return always zero.
 161  *
 162  * Remove all proc entries created by proc_init().
 163  */
 164 int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root)
 165 {
 166         struct drm_device *dev = minor->dev;
 167         int i;
 168         char name[64];
 169
 170         if (!root || !minor->dev_root)
 171                 return 0;
 172
 173         if (dev->driver->proc_cleanup)
 174                 dev->driver->proc_cleanup(minor);
 175
 176         for (i = 0; i < DRM_PROC_ENTRIES; i++)
 177                 remove_proc_entry(drm_proc_list[i].name, minor->dev_root);
 178         sprintf(name, "%d", minor->index);
 179         remove_proc_entry(name, root);
 180
 181         return 0;
 182 }
 183
 184 /**
 185  * Called when "/proc/dri/.../name" is read.
 186  *
 187  * \param buf output buffer.
 188  * \param start start of output data.
 189  * \param offset requested start offset.
 190  * \param request requested number of bytes.
 191  * \param eof whether there is no more data to return.
 192  * \param data private data.
 193  * \return number of written bytes.
 194  *
 195  * Prints the device name together with the bus id if available.
 196  */
 197 static int drm_name_info(char *buf, char **start, off_t offset, int request,
 198                          int *eof, void *data)
 199 {
 200         struct drm_minor *minor = (struct drm_minor *) data;
 201         struct drm_master *master = minor->master;
 202         struct drm_device *dev = minor->dev;
 203         int len = 0;
 204
 205         if (offset > DRM_PROC_LIMIT) {
 206                 *eof = 1;
 207                 return 0;
 208         }
 209
 210         if (!master)
 211                 return 0;
 212
 213         *start = &buf[offset];
 214         *eof = 0;
 215
 216         if (master->unique) {
 217                 DRM_PROC_PRINT("%s %s %s\n",
 218                                dev->driver->pci_driver.name,
 219                                pci_name(dev->pdev), master->unique);
 220         } else {
 221                 DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name,
 222                                pci_name(dev->pdev));
 223         }
 224
 225         if (len > request + offset)
 226                 return request;
 227         *eof = 1;
 228         return len - offset;
 229 }
 230
 231 /**
 232  * Called when "/proc/dri/.../vm" is read.
 233  *
 234  * \param buf output buffer.
 235  * \param start start of output data.
 236  * \param offset requested start offset.
 237  * \param request requested number of bytes.
 238  * \param eof whether there is no more data to return.
 239  * \param data private data.
 240  * \return number of written bytes.
 241  *
 242  * Prints information about all mappings in drm_device::maplist.
 243  */
 244 static int drm__vm_info(char *buf, char **start, off_t offset, int request,
 245                         int *eof, void *data)
 246 {
 247         struct drm_minor *minor = (struct drm_minor *) data;
 248         struct drm_device *dev = minor->dev;
 249         int len = 0;
 250         struct drm_map *map;
 251         struct drm_map_list *r_list;
 252
 253         /* Hardcoded from _DRM_FRAME_BUFFER,
 254            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 255            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 256         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 257         const char *type;
 258         int i;
 259
 260         if (offset > DRM_PROC_LIMIT) {
 261                 *eof = 1;
 262                 return 0;
 263         }
 264
 265         *start = &buf[offset];
 266         *eof = 0;
 267
 268         DRM_PROC_PRINT("slot     offset       size type flags    "
 269                        "address mtrr\n\n");
 270         i = 0;
 271         list_for_each_entry(r_list, &dev->maplist, head) {
 272                 map = r_list->map;
 273                 if (!map)
 274                         continue;
 275                 if (map->type < 0 || map->type > 5)
 276                         type = "??";
 277                 else
 278                         type = types[map->type];
 279                 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 280                                i,
 281                                map->offset,
 282                                map->size, type, map->flags,
 283                                (unsigned long) r_list->user_token);
 284                 if (map->mtrr < 0) {
 285                         DRM_PROC_PRINT("none\n");
 286                 } else {
 287                         DRM_PROC_PRINT("%4d\n", map->mtrr);
 288                 }
 289                 i++;
 290         }
 291
 292         if (len > request + offset)
 293                 return request;
 294         *eof = 1;
 295         return len - offset;
 296 }
 297
 298 /**
 299  * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
 300  */
 301 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
 302                        int *eof, void *data)
 303 {
 304         struct drm_minor *minor = (struct drm_minor *) data;
 305         struct drm_device *dev = minor->dev;
 306         int ret;
 307
 308         mutex_lock(&dev->struct_mutex);
 309         ret = drm__vm_info(buf, start, offset, request, eof, data);
 310         mutex_unlock(&dev->struct_mutex);
 311         return ret;
 312 }
 313
 314 /**
 315  * Called when "/proc/dri/.../queues" is read.
 316  *
 317  * \param buf output buffer.
 318  * \param start start of output data.
 319  * \param offset requested start offset.
 320  * \param request requested number of bytes.
 321  * \param eof whether there is no more data to return.
 322  * \param data private data.
 323  * \return number of written bytes.
 324  */
 325 static int drm__queues_info(char *buf, char **start, off_t offset,
 326                             int request, int *eof, void *data)
 327 {
 328         struct drm_minor *minor = (struct drm_minor *) data;
 329         struct drm_device *dev = minor->dev;
 330         int len = 0;
 331         int i;
 332         struct drm_queue *q;
 333
 334         if (offset > DRM_PROC_LIMIT) {
 335                 *eof = 1;
 336                 return 0;
 337         }
 338
 339         *start = &buf[offset];
 340         *eof = 0;
 341
 342         DRM_PROC_PRINT("  ctx/flags   use   fin"
 343                        "   blk/rw/rwf  wait    flushed     queued"
 344                        "      locks\n\n");
 345         for (i = 0; i < dev->queue_count; i++) {
 346                 q = dev->queuelist[i];
 347                 atomic_inc(&q->use_count);
 348                 DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
 349                                    "%5d/0x%03x %5d %5d"
 350                                    " %5d/%c%c/%c%c%c %5Zd\n",
 351                                    i,
 352                                    q->flags,
 353                                    atomic_read(&q->use_count),
 354                                    atomic_read(&q->finalization),
 355                                    atomic_read(&q->block_count),
 356                                    atomic_read(&q->block_read) ? 'r' : '-',
 357                                    atomic_read(&q->block_write) ? 'w' : '-',
 358                                    waitqueue_active(&q->read_queue) ? 'r' : '-',
 359                                    waitqueue_active(&q->
 360                                                     write_queue) ? 'w' : '-',
 361                                    waitqueue_active(&q->
 362                                                     flush_queue) ? 'f' : '-',
 363                                    DRM_BUFCOUNT(&q->waitlist));
 364                 atomic_dec(&q->use_count);
 365         }
 366
 367         if (len > request + offset)
 368                 return request;
 369         *eof = 1;
 370         return len - offset;
 371 }
 372
 373 /**
 374  * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
 375  */
 376 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
 377                            int *eof, void *data)
 378 {
 379         struct drm_minor *minor = (struct drm_minor *) data;
 380         struct drm_device *dev = minor->dev;
 381         int ret;
 382
 383         mutex_lock(&dev->struct_mutex);
 384         ret = drm__queues_info(buf, start, offset, request, eof, data);
 385         mutex_unlock(&dev->struct_mutex);
 386         return ret;
 387 }
 388
 389 /**
 390  * Called when "/proc/dri/.../bufs" is read.
 391  *
 392  * \param buf output buffer.
 393  * \param start start of output data.
 394  * \param offset requested start offset.
 395  * \param request requested number of bytes.
 396  * \param eof whether there is no more data to return.
 397  * \param data private data.
 398  * \return number of written bytes.
 399  */
 400 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
 401                           int *eof, void *data)
 402 {
 403         struct drm_minor *minor = (struct drm_minor *) data;
 404         struct drm_device *dev = minor->dev;
 405         int len = 0;
 406         struct drm_device_dma *dma = dev->dma;
 407         int i;
 408
 409         if (!dma || offset > DRM_PROC_LIMIT) {
 410                 *eof = 1;
 411                 return 0;
 412         }
 413
 414         *start = &buf[offset];
 415         *eof = 0;
 416
 417         DRM_PROC_PRINT(" o     size count  free  segs pages    kB\n\n");
 418         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 419                 if (dma->bufs[i].buf_count)
 420                         DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
 421                                        i,
 422                                        dma->bufs[i].buf_size,
 423                                        dma->bufs[i].buf_count,
 424                                        atomic_read(&dma->bufs[i]
 425                                                    .freelist.count),
 426                                        dma->bufs[i].seg_count,
 427                                        dma->bufs[i].seg_count
 428                                        * (1 << dma->bufs[i].page_order),
 429                                        (dma->bufs[i].seg_count
 430                                         * (1 << dma->bufs[i].page_order))
 431                                        * PAGE_SIZE / 1024);
 432         }
 433         DRM_PROC_PRINT("\n");
 434         for (i = 0; i < dma->buf_count; i++) {
 435                 if (i && !(i % 32))
 436                         DRM_PROC_PRINT("\n");
 437                 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
 438         }
 439         DRM_PROC_PRINT("\n");
 440
 441         if (len > request + offset)
 442                 return request;
 443         *eof = 1;
 444         return len - offset;
 445 }
 446
 447 /**
 448  * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
 449  */
 450 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
 451                          int *eof, void *data)
 452 {
 453         struct drm_minor *minor = (struct drm_minor *) data;
 454         struct drm_device *dev = minor->dev;
 455         int ret;
 456
 457         mutex_lock(&dev->struct_mutex);
 458         ret = drm__bufs_info(buf, start, offset, request, eof, data);
 459         mutex_unlock(&dev->struct_mutex);
 460         return ret;
 461 }
 462
 463 /**
 464  * Called when "/proc/dri/.../vblank" is read.
 465  *
 466  * \param buf output buffer.
 467  * \param start start of output data.
 468  * \param offset requested start offset.
 469  * \param request requested number of bytes.
 470  * \param eof whether there is no more data to return.
 471  * \param data private data.
 472  * \return number of written bytes.
 473  */
 474 static int drm__vblank_info(char *buf, char **start, off_t offset, int request,
 475                           int *eof, void *data)
 476 {
 477         struct drm_minor *minor = (struct drm_minor *) data;
 478         struct drm_device *dev = minor->dev;
 479         int len = 0;
 480         int crtc;
 481
 482         if (offset > DRM_PROC_LIMIT) {
 483                 *eof = 1;
 484                 return 0;
 485         }
 486
 487         *start = &buf[offset];
 488         *eof = 0;
 489
 490         for (crtc = 0; crtc < dev->num_crtcs; crtc++) {
 491                 DRM_PROC_PRINT("CRTC %d enable:     %d\n",
 492                                crtc, atomic_read(&dev->vblank_refcount[crtc]));
 493                 DRM_PROC_PRINT("CRTC %d counter:    %d\n",
 494                                crtc, drm_vblank_count(dev, crtc));
 495                 DRM_PROC_PRINT("CRTC %d last wait:  %d\n",
 496                                crtc, dev->last_vblank_wait[crtc]);
 497                 DRM_PROC_PRINT("CRTC %d in modeset: %d\n",
 498                                crtc, dev->vblank_inmodeset[crtc]);
 499         }
 500
 501         if (len > request + offset)
 502                 return request;
 503         *eof = 1;
 504         return len - offset;
 505 }
 506
 507 /**
 508  * Simply calls _vblank_info() while holding the drm_device::struct_mutex lock.
 509  */
 510 static int drm_vblank_info(char *buf, char **start, off_t offset, int request,
 511                          int *eof, void *data)
 512 {
 513         struct drm_minor *minor = (struct drm_minor *) data;
 514         struct drm_device *dev = minor->dev;
 515         int ret;
 516
 517         mutex_lock(&dev->struct_mutex);
 518         ret = drm__vblank_info(buf, start, offset, request, eof, data);
 519         mutex_unlock(&dev->struct_mutex);
 520         return ret;
 521 }
 522
 523 /**
 524  * Called when "/proc/dri/.../clients" is read.
 525  *
 526  * \param buf output buffer.
 527  * \param start start of output data.
 528  * \param offset requested start offset.
 529  * \param request requested number of bytes.
 530  * \param eof whether there is no more data to return.
 531  * \param data private data.
 532  * \return number of written bytes.
 533  */
 534 static int drm__clients_info(char *buf, char **start, off_t offset,
 535                              int request, int *eof, void *data)
 536 {
 537         struct drm_minor *minor = (struct drm_minor *) data;
 538         struct drm_device *dev = minor->dev;
 539         int len = 0;
 540         struct drm_file *priv;
 541
 542         if (offset > DRM_PROC_LIMIT) {
 543                 *eof = 1;
 544                 return 0;
 545         }
 546
 547         *start = &buf[offset];
 548         *eof = 0;
 549
 550         DRM_PROC_PRINT("a dev   pid    uid      magic     ioctls\n\n");
 551         list_for_each_entry(priv, &dev->filelist, lhead) {
 552                 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
 553                                priv->authenticated ? 'y' : 'n',
 554                                priv->minor->index,
 555                                priv->pid,
 556                                priv->uid, priv->magic, priv->ioctl_count);
 557         }
 558
 559         if (len > request + offset)
 560                 return request;
 561         *eof = 1;
 562         return len - offset;
 563 }
 564
 565 /**
 566  * Simply calls _clients_info() while holding the drm_device::struct_mutex lock.
 567  */
 568 static int drm_clients_info(char *buf, char **start, off_t offset,
 569                             int request, int *eof, void *data)
 570 {
 571         struct drm_minor *minor = (struct drm_minor *) data;
 572         struct drm_device *dev = minor->dev;
 573         int ret;
 574
 575         mutex_lock(&dev->struct_mutex);
 576         ret = drm__clients_info(buf, start, offset, request, eof, data);
 577         mutex_unlock(&dev->struct_mutex);
 578         return ret;
 579 }
 580
 581 struct drm_gem_name_info_data {
 582        int                     len;
 583        char                    *buf;
 584        int                     eof;
 585 };
 586
 587 static int drm_gem_one_name_info(int id, void *ptr, void *data)
 588 {
 589         struct drm_gem_object *obj = ptr;
 590         struct drm_gem_name_info_data   *nid = data;
 591
 592         DRM_INFO("name %d size %zd\n", obj->name, obj->size);
 593         if (nid->eof)
 594                 return 0;
 595
 596         nid->len += sprintf(&nid->buf[nid->len],
 597                             "%6d %8zd %7d %8d\n",
 598                             obj->name, obj->size,
 599                             atomic_read(&obj->handlecount.refcount),
 600                             atomic_read(&obj->refcount.refcount));
 601         if (nid->len > DRM_PROC_LIMIT) {
 602                 nid->eof = 1;
 603                 return 0;
 604         }
 605         return 0;
 606 }
 607
 608 static int drm_gem_name_info(char *buf, char **start, off_t offset,
 609                              int request, int *eof, void *data)
 610 {
 611         struct drm_minor *minor = (struct drm_minor *) data;
 612         struct drm_device *dev = minor->dev;
 613         struct drm_gem_name_info_data nid;
 614
 615         if (offset > DRM_PROC_LIMIT) {
 616                 *eof = 1;
 617                 return 0;
 618         }
 619
 620         nid.len = sprintf(buf, "  name     size handles refcount\n");
 621         nid.buf = buf;
 622         nid.eof = 0;
 623         idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, &nid);
 624
 625         *start = &buf[offset];
 626         *eof = 0;
 627         if (nid.len > request + offset)
 628                 return request;
 629         *eof = 1;
 630         return nid.len - offset;
 631 }
 632
 633 static int drm_gem_object_info(char *buf, char **start, off_t offset,
 634                                int request, int *eof, void *data)
 635 {
 636         struct drm_minor *minor = (struct drm_minor *) data;
 637         struct drm_device *dev = minor->dev;
 638         int len = 0;
 639
 640         if (offset > DRM_PROC_LIMIT) {
 641                 *eof = 1;
 642                 return 0;
 643         }
 644
 645         *start = &buf[offset];
 646         *eof = 0;
 647         DRM_PROC_PRINT("%d objects\n", atomic_read(&dev->object_count));
 648         DRM_PROC_PRINT("%d object bytes\n", atomic_read(&dev->object_memory));
 649         DRM_PROC_PRINT("%d pinned\n", atomic_read(&dev->pin_count));
 650         DRM_PROC_PRINT("%d pin bytes\n", atomic_read(&dev->pin_memory));
 651         DRM_PROC_PRINT("%d gtt bytes\n", atomic_read(&dev->gtt_memory));
 652         DRM_PROC_PRINT("%d gtt total\n", dev->gtt_total);
 653         if (len > request + offset)
 654                 return request;
 655         *eof = 1;
 656         return len - offset;
 657 }
 658
 659 #if DRM_DEBUG_CODE
 660
 661 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
 662                          int *eof, void *data)
 663 {
 664         struct drm_minor *minor = (struct drm_minor *) data;
 665         struct drm_device *dev = minor->dev;
 666         int len = 0;
 667         struct drm_vma_entry *pt;
 668         struct vm_area_struct *vma;
 669 #if defined(__i386__)
 670         unsigned int pgprot;
 671 #endif
 672
 673         if (offset > DRM_PROC_LIMIT) {
 674                 *eof = 1;
 675                 return 0;
 676         }
 677
 678         *start = &buf[offset];
 679         *eof = 0;
 680
 681         DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%llx\n",
 682                        atomic_read(&dev->vma_count),
 683                        high_memory, (u64)virt_to_phys(high_memory));
 684         list_for_each_entry(pt, &dev->vmalist, head) {
 685                 if (!(vma = pt->vma))
 686                         continue;
 687                 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
 688                                pt->pid,
 689                                vma->vm_start,
 690                                vma->vm_end,
 691                                vma->vm_flags & VM_READ ? 'r' : '-',
 692                                vma->vm_flags & VM_WRITE ? 'w' : '-',
 693                                vma->vm_flags & VM_EXEC ? 'x' : '-',
 694                                vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 695                                vma->vm_flags & VM_LOCKED ? 'l' : '-',
 696                                vma->vm_flags & VM_IO ? 'i' : '-',
 697                                vma->vm_pgoff);
 698
 699 #if defined(__i386__)
 700                 pgprot = pgprot_val(vma->vm_page_prot);
 701                 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
 702                                pgprot & _PAGE_PRESENT ? 'p' : '-',
 703                                pgprot & _PAGE_RW ? 'w' : 'r',
 704                                pgprot & _PAGE_USER ? 'u' : 's',
 705                                pgprot & _PAGE_PWT ? 't' : 'b',
 706                                pgprot & _PAGE_PCD ? 'u' : 'c',
 707                                pgprot & _PAGE_ACCESSED ? 'a' : '-',
 708                                pgprot & _PAGE_DIRTY ? 'd' : '-',
 709                                pgprot & _PAGE_PSE ? 'm' : 'k',
 710                                pgprot & _PAGE_GLOBAL ? 'g' : 'l');
 711 #endif
 712                 DRM_PROC_PRINT("\n");
 713         }
 714
 715         if (len > request + offset)
 716                 return request;
 717         *eof = 1;
 718         return len - offset;
 719 }
 720
 721 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
 722                         int *eof, void *data)
 723 {
 724         struct drm_minor *minor = (struct drm_minor *) data;
 725         struct drm_device *dev = minor->dev;
 726         int ret;
 727
 728         mutex_lock(&dev->struct_mutex);
 729         ret = drm__vma_info(buf, start, offset, request, eof, data);
 730         mutex_unlock(&dev->struct_mutex);
 731         return ret;
 732 }
 733 #endif