drivers/char/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 #if DRM_DEBUG_CODE
  53 static int drm_vma_info(char *buf, char **start, off_t offset,
  54                         int request, int *eof, void *data);
  55 #endif
  56
  57 /**
  58  * Proc file list.
  59  */
  60 static struct drm_proc_list {
  61         const char *name;       /**< file name */
  62         int (*f) (char *, char **, off_t, int, int *, void *);          /**< proc callback*/
  63 } drm_proc_list[] = {
  64         {"name", drm_name_info},
  65         {"mem", drm_mem_info},
  66         {"vm", drm_vm_info},
  67         {"clients", drm_clients_info},
  68         {"queues", drm_queues_info},
  69         {"bufs", drm_bufs_info},
  70 #if DRM_DEBUG_CODE
  71         {"vma", drm_vma_info},
  72 #endif
  73 };
  74
  75 #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
  76
  77 /**
  78  * Initialize the DRI proc filesystem for a device.
  79  *
  80  * \param dev DRM device.
  81  * \param minor device minor number.
  82  * \param root DRI proc dir entry.
  83  * \param dev_root resulting DRI device proc dir entry.
  84  * \return root entry pointer on success, or NULL on failure.
  85  *
  86  * Create the DRI proc root entry "/proc/dri", the device proc root entry
  87  * "/proc/dri/%minor%/", and each entry in proc_list as
  88  * "/proc/dri/%minor%/%name%".
  89  */
  90 int drm_proc_init(struct drm_device * dev, int minor,
  91                   struct proc_dir_entry *root, struct proc_dir_entry **dev_root)
  92 {
  93         struct proc_dir_entry *ent;
  94         int i, j;
  95         char name[64];
  96
  97         sprintf(name, "%d", minor);
  98         *dev_root = proc_mkdir(name, root);
  99         if (!*dev_root) {
 100                 DRM_ERROR("Cannot create /proc/dri/%s\n", name);
 101                 return -1;
 102         }
 103
 104         for (i = 0; i < DRM_PROC_ENTRIES; i++) {
 105                 ent = create_proc_entry(drm_proc_list[i].name,
 106                                         S_IFREG | S_IRUGO, *dev_root);
 107                 if (!ent) {
 108                         DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
 109                                   name, drm_proc_list[i].name);
 110                         for (j = 0; j < i; j++)
 111                                 remove_proc_entry(drm_proc_list[i].name,
 112                                                   *dev_root);
 113                         remove_proc_entry(name, root);
 114                         return -1;
 115                 }
 116                 ent->read_proc = drm_proc_list[i].f;
 117                 ent->data = dev;
 118         }
 119
 120         return 0;
 121 }
 122
 123 /**
 124  * Cleanup the proc filesystem resources.
 125  *
 126  * \param minor device minor number.
 127  * \param root DRI proc dir entry.
 128  * \param dev_root DRI device proc dir entry.
 129  * \return always zero.
 130  *
 131  * Remove all proc entries created by proc_init().
 132  */
 133 int drm_proc_cleanup(int minor, struct proc_dir_entry *root,
 134                      struct proc_dir_entry *dev_root)
 135 {
 136         int i;
 137         char name[64];
 138
 139         if (!root || !dev_root)
 140                 return 0;
 141
 142         for (i = 0; i < DRM_PROC_ENTRIES; i++)
 143                 remove_proc_entry(drm_proc_list[i].name, dev_root);
 144         sprintf(name, "%d", minor);
 145         remove_proc_entry(name, root);
 146
 147         return 0;
 148 }
 149
 150 /**
 151  * Called when "/proc/dri/.../name" is read.
 152  *
 153  * \param buf output buffer.
 154  * \param start start of output data.
 155  * \param offset requested start offset.
 156  * \param request requested number of bytes.
 157  * \param eof whether there is no more data to return.
 158  * \param data private data.
 159  * \return number of written bytes.
 160  *
 161  * Prints the device name together with the bus id if available.
 162  */
 163 static int drm_name_info(char *buf, char **start, off_t offset, int request,
 164                          int *eof, void *data)
 165 {
 166         struct drm_device *dev = (struct drm_device *) data;
 167         int len = 0;
 168
 169         if (offset > DRM_PROC_LIMIT) {
 170                 *eof = 1;
 171                 return 0;
 172         }
 173
 174         *start = &buf[offset];
 175         *eof = 0;
 176
 177         if (dev->unique) {
 178                 DRM_PROC_PRINT("%s %s %s\n",
 179                                dev->driver->pci_driver.name,
 180                                pci_name(dev->pdev), dev->unique);
 181         } else {
 182                 DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name,
 183                                pci_name(dev->pdev));
 184         }
 185
 186         if (len > request + offset)
 187                 return request;
 188         *eof = 1;
 189         return len - offset;
 190 }
 191
 192 /**
 193  * Called when "/proc/dri/.../vm" is read.
 194  *
 195  * \param buf output buffer.
 196  * \param start start of output data.
 197  * \param offset requested start offset.
 198  * \param request requested number of bytes.
 199  * \param eof whether there is no more data to return.
 200  * \param data private data.
 201  * \return number of written bytes.
 202  *
 203  * Prints information about all mappings in drm_device::maplist.
 204  */
 205 static int drm__vm_info(char *buf, char **start, off_t offset, int request,
 206                         int *eof, void *data)
 207 {
 208         struct drm_device *dev = (struct drm_device *) data;
 209         int len = 0;
 210         struct drm_map *map;
 211         drm_map_list_t *r_list;
 212
 213         /* Hardcoded from _DRM_FRAME_BUFFER,
 214            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 215            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 216         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 217         const char *type;
 218         int i;
 219
 220         if (offset > DRM_PROC_LIMIT) {
 221                 *eof = 1;
 222                 return 0;
 223         }
 224
 225         *start = &buf[offset];
 226         *eof = 0;
 227
 228         DRM_PROC_PRINT("slot     offset       size type flags    "
 229                        "address mtrr\n\n");
 230         i = 0;
 231         list_for_each_entry(r_list, &dev->maplist, head) {
 232                 map = r_list->map;
 233                 if (!map)
 234                         continue;
 235                 if (map->type < 0 || map->type > 5)
 236                         type = "??";
 237                 else
 238                         type = types[map->type];
 239                 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08x ",
 240                                i,
 241                                map->offset,
 242                                map->size, type, map->flags,
 243                                r_list->user_token);
 244                 if (map->mtrr < 0) {
 245                         DRM_PROC_PRINT("none\n");
 246                 } else {
 247                         DRM_PROC_PRINT("%4d\n", map->mtrr);
 248                 }
 249                 i++;
 250         }
 251
 252         if (len > request + offset)
 253                 return request;
 254         *eof = 1;
 255         return len - offset;
 256 }
 257
 258 /**
 259  * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
 260  */
 261 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
 262                        int *eof, void *data)
 263 {
 264         struct drm_device *dev = (struct drm_device *) data;
 265         int ret;
 266
 267         mutex_lock(&dev->struct_mutex);
 268         ret = drm__vm_info(buf, start, offset, request, eof, data);
 269         mutex_unlock(&dev->struct_mutex);
 270         return ret;
 271 }
 272
 273 /**
 274  * Called when "/proc/dri/.../queues" is read.
 275  *
 276  * \param buf output buffer.
 277  * \param start start of output data.
 278  * \param offset requested start offset.
 279  * \param request requested number of bytes.
 280  * \param eof whether there is no more data to return.
 281  * \param data private data.
 282  * \return number of written bytes.
 283  */
 284 static int drm__queues_info(char *buf, char **start, off_t offset,
 285                             int request, int *eof, void *data)
 286 {
 287         struct drm_device *dev = (struct drm_device *) data;
 288         int len = 0;
 289         int i;
 290         drm_queue_t *q;
 291
 292         if (offset > DRM_PROC_LIMIT) {
 293                 *eof = 1;
 294                 return 0;
 295         }
 296
 297         *start = &buf[offset];
 298         *eof = 0;
 299
 300         DRM_PROC_PRINT("  ctx/flags   use   fin"
 301                        "   blk/rw/rwf  wait    flushed     queued"
 302                        "      locks\n\n");
 303         for (i = 0; i < dev->queue_count; i++) {
 304                 q = dev->queuelist[i];
 305                 atomic_inc(&q->use_count);
 306                 DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
 307                                    "%5d/0x%03x %5d %5d"
 308                                    " %5d/%c%c/%c%c%c %5Zd\n",
 309                                    i,
 310                                    q->flags,
 311                                    atomic_read(&q->use_count),
 312                                    atomic_read(&q->finalization),
 313                                    atomic_read(&q->block_count),
 314                                    atomic_read(&q->block_read) ? 'r' : '-',
 315                                    atomic_read(&q->block_write) ? 'w' : '-',
 316                                    waitqueue_active(&q->read_queue) ? 'r' : '-',
 317                                    waitqueue_active(&q->
 318                                                     write_queue) ? 'w' : '-',
 319                                    waitqueue_active(&q->
 320                                                     flush_queue) ? 'f' : '-',
 321                                    DRM_BUFCOUNT(&q->waitlist));
 322                 atomic_dec(&q->use_count);
 323         }
 324
 325         if (len > request + offset)
 326                 return request;
 327         *eof = 1;
 328         return len - offset;
 329 }
 330
 331 /**
 332  * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
 333  */
 334 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
 335                            int *eof, void *data)
 336 {
 337         struct drm_device *dev = (struct drm_device *) data;
 338         int ret;
 339
 340         mutex_lock(&dev->struct_mutex);
 341         ret = drm__queues_info(buf, start, offset, request, eof, data);
 342         mutex_unlock(&dev->struct_mutex);
 343         return ret;
 344 }
 345
 346 /**
 347  * Called when "/proc/dri/.../bufs" is read.
 348  *
 349  * \param buf output buffer.
 350  * \param start start of output data.
 351  * \param offset requested start offset.
 352  * \param request requested number of bytes.
 353  * \param eof whether there is no more data to return.
 354  * \param data private data.
 355  * \return number of written bytes.
 356  */
 357 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
 358                           int *eof, void *data)
 359 {
 360         struct drm_device *dev = (struct drm_device *) data;
 361         int len = 0;
 362         drm_device_dma_t *dma = dev->dma;
 363         int i;
 364
 365         if (!dma || offset > DRM_PROC_LIMIT) {
 366                 *eof = 1;
 367                 return 0;
 368         }
 369
 370         *start = &buf[offset];
 371         *eof = 0;
 372
 373         DRM_PROC_PRINT(" o     size count  free  segs pages    kB\n\n");
 374         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 375                 if (dma->bufs[i].buf_count)
 376                         DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
 377                                        i,
 378                                        dma->bufs[i].buf_size,
 379                                        dma->bufs[i].buf_count,
 380                                        atomic_read(&dma->bufs[i]
 381                                                    .freelist.count),
 382                                        dma->bufs[i].seg_count,
 383                                        dma->bufs[i].seg_count
 384                                        * (1 << dma->bufs[i].page_order),
 385                                        (dma->bufs[i].seg_count
 386                                         * (1 << dma->bufs[i].page_order))
 387                                        * PAGE_SIZE / 1024);
 388         }
 389         DRM_PROC_PRINT("\n");
 390         for (i = 0; i < dma->buf_count; i++) {
 391                 if (i && !(i % 32))
 392                         DRM_PROC_PRINT("\n");
 393                 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
 394         }
 395         DRM_PROC_PRINT("\n");
 396
 397         if (len > request + offset)
 398                 return request;
 399         *eof = 1;
 400         return len - offset;
 401 }
 402
 403 /**
 404  * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
 405  */
 406 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
 407                          int *eof, void *data)
 408 {
 409         struct drm_device *dev = (struct drm_device *) data;
 410         int ret;
 411
 412         mutex_lock(&dev->struct_mutex);
 413         ret = drm__bufs_info(buf, start, offset, request, eof, data);
 414         mutex_unlock(&dev->struct_mutex);
 415         return ret;
 416 }
 417
 418 /**
 419  * Called when "/proc/dri/.../clients" is read.
 420  *
 421  * \param buf output buffer.
 422  * \param start start of output data.
 423  * \param offset requested start offset.
 424  * \param request requested number of bytes.
 425  * \param eof whether there is no more data to return.
 426  * \param data private data.
 427  * \return number of written bytes.
 428  */
 429 static int drm__clients_info(char *buf, char **start, off_t offset,
 430                              int request, int *eof, void *data)
 431 {
 432         struct drm_device *dev = (struct drm_device *) data;
 433         int len = 0;
 434         struct drm_file *priv;
 435
 436         if (offset > DRM_PROC_LIMIT) {
 437                 *eof = 1;
 438                 return 0;
 439         }
 440
 441         *start = &buf[offset];
 442         *eof = 0;
 443
 444         DRM_PROC_PRINT("a dev   pid    uid      magic     ioctls\n\n");
 445         list_for_each_entry(priv, &dev->filelist, lhead) {
 446                 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
 447                                priv->authenticated ? 'y' : 'n',
 448                                priv->minor,
 449                                priv->pid,
 450                                priv->uid, priv->magic, priv->ioctl_count);
 451         }
 452
 453         if (len > request + offset)
 454                 return request;
 455         *eof = 1;
 456         return len - offset;
 457 }
 458
 459 /**
 460  * Simply calls _clients_info() while holding the drm_device::struct_mutex lock.
 461  */
 462 static int drm_clients_info(char *buf, char **start, off_t offset,
 463                             int request, int *eof, void *data)
 464 {
 465         struct drm_device *dev = (struct drm_device *) data;
 466         int ret;
 467
 468         mutex_lock(&dev->struct_mutex);
 469         ret = drm__clients_info(buf, start, offset, request, eof, data);
 470         mutex_unlock(&dev->struct_mutex);
 471         return ret;
 472 }
 473
 474 #if DRM_DEBUG_CODE
 475
 476 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
 477                          int *eof, void *data)
 478 {
 479         struct drm_device *dev = (struct drm_device *) data;
 480         int len = 0;
 481         drm_vma_entry_t *pt;
 482         struct vm_area_struct *vma;
 483 #if defined(__i386__)
 484         unsigned int pgprot;
 485 #endif
 486
 487         if (offset > DRM_PROC_LIMIT) {
 488                 *eof = 1;
 489                 return 0;
 490         }
 491
 492         *start = &buf[offset];
 493         *eof = 0;
 494
 495         DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
 496                        atomic_read(&dev->vma_count),
 497                        high_memory, virt_to_phys(high_memory));
 498         list_for_each_entry(pt, &dev->vmalist, head) {
 499                 if (!(vma = pt->vma))
 500                         continue;
 501                 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
 502                                pt->pid,
 503                                vma->vm_start,
 504                                vma->vm_end,
 505                                vma->vm_flags & VM_READ ? 'r' : '-',
 506                                vma->vm_flags & VM_WRITE ? 'w' : '-',
 507                                vma->vm_flags & VM_EXEC ? 'x' : '-',
 508                                vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 509                                vma->vm_flags & VM_LOCKED ? 'l' : '-',
 510                                vma->vm_flags & VM_IO ? 'i' : '-',
 511                                vma->vm_pgoff);
 512
 513 #if defined(__i386__)
 514                 pgprot = pgprot_val(vma->vm_page_prot);
 515                 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
 516                                pgprot & _PAGE_PRESENT ? 'p' : '-',
 517                                pgprot & _PAGE_RW ? 'w' : 'r',
 518                                pgprot & _PAGE_USER ? 'u' : 's',
 519                                pgprot & _PAGE_PWT ? 't' : 'b',
 520                                pgprot & _PAGE_PCD ? 'u' : 'c',
 521                                pgprot & _PAGE_ACCESSED ? 'a' : '-',
 522                                pgprot & _PAGE_DIRTY ? 'd' : '-',
 523                                pgprot & _PAGE_PSE ? 'm' : 'k',
 524                                pgprot & _PAGE_GLOBAL ? 'g' : 'l');
 525 #endif
 526                 DRM_PROC_PRINT("\n");
 527         }
 528
 529         if (len > request + offset)
 530                 return request;
 531         *eof = 1;
 532         return len - offset;
 533 }
 534
 535 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
 536                         int *eof, void *data)
 537 {
 538         struct drm_device *dev = (struct drm_device *) data;
 539         int ret;
 540
 541         mutex_lock(&dev->struct_mutex);
 542         ret = drm__vma_info(buf, start, offset, request, eof, data);
 543         mutex_unlock(&dev->struct_mutex);
 544         return ret;
 545 }
 546 #endif