drivers/char/drm/drm_proc.c

   1 /**
   2  * \file drm_proc.h
   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 #define DRM_PROC_ENTRIES (sizeof(drm_proc_list)/sizeof(drm_proc_list[0]))
  75
  76 /**
  77  * Initialize the DRI proc filesystem for a device.
  78  *
  79  * \param dev DRM device.
  80  * \param minor device minor number.
  81  * \param root DRI proc dir entry.
  82  * \param dev_root resulting DRI device proc dir entry.
  83  * \return root entry pointer on success, or NULL on failure.
  84  *
  85  * Create the DRI proc root entry "/proc/dri", the device proc root entry
  86  * "/proc/dri/%minor%/", and each entry in proc_list as
  87  * "/proc/dri/%minor%/%name%".
  88  */
  89 int drm_proc_init(drm_device_t *dev, int minor,
  90                     struct proc_dir_entry *root,
  91                     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 = create_proc_entry(name, S_IFDIR, 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 /**
 125  * Cleanup the proc filesystem resources.
 126  *
 127  * \param minor device minor number.
 128  * \param root DRI proc dir entry.
 129  * \param dev_root DRI device proc dir entry.
 130  * \return always zero.
 131  *
 132  * Remove all proc entries created by proc_init().
 133  */
 134 int drm_proc_cleanup(int minor, struct proc_dir_entry *root,
 135                       struct proc_dir_entry *dev_root)
 136 {
 137         int  i;
 138         char name[64];
 139
 140         if (!root || !dev_root) 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         drm_device_t *dev = (drm_device_t *)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, pci_name(dev->pdev), dev->unique);
 180         } else {
 181                 DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name, pci_name(dev->pdev));
 182         }
 183
 184         if (len > request + offset) return request;
 185         *eof = 1;
 186         return len - offset;
 187 }
 188
 189 /**
 190  * Called when "/proc/dri/.../vm" is read.
 191  *
 192  * \param buf output buffer.
 193  * \param start start of output data.
 194  * \param offset requested start offset.
 195  * \param request requested number of bytes.
 196  * \param eof whether there is no more data to return.
 197  * \param data private data.
 198  * \return number of written bytes.
 199  *
 200  * Prints information about all mappings in drm_device::maplist.
 201  */
 202 static int drm__vm_info(char *buf, char **start, off_t offset, int request,
 203                          int *eof, void *data)
 204 {
 205         drm_device_t *dev = (drm_device_t *)data;
 206         int          len  = 0;
 207         drm_map_t    *map;
 208         drm_map_list_t *r_list;
 209         struct list_head *list;
 210
 211                                 /* Hardcoded from _DRM_FRAME_BUFFER,
 212                                    _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 213                                    _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 214         const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 215         const char   *type;
 216         int          i;
 217
 218         if (offset > DRM_PROC_LIMIT) {
 219                 *eof = 1;
 220                 return 0;
 221         }
 222
 223         *start = &buf[offset];
 224         *eof   = 0;
 225
 226         DRM_PROC_PRINT("slot     offset       size type flags    "
 227                        "address mtrr\n\n");
 228         i = 0;
 229         if (dev->maplist != NULL) list_for_each(list, &dev->maplist->head) {
 230                 r_list = list_entry(list, drm_map_list_t, head);
 231                 map = r_list->map;
 232                 if(!map)
 233                         continue;
 234                 if (map->type < 0 || map->type > 5)
 235                         type = "??";
 236                 else
 237                         type = types[map->type];
 238                 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08x ",
 239                                i,
 240                                map->offset,
 241                                map->size,
 242                                type,
 243                                map->flags,
 244                                r_list->user_token);
 245                 if (map->mtrr < 0) {
 246                         DRM_PROC_PRINT("none\n");
 247                 } else {
 248                         DRM_PROC_PRINT("%4d\n", map->mtrr);
 249                 }
 250                 i++;
 251         }
 252
 253         if (len > request + offset) return request;
 254         *eof = 1;
 255         return len - offset;
 256 }
 257
 258 /**
 259  * Simply calls _vm_info() while holding the drm_device::struct_sem lock.
 260  */
 261 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
 262                         int *eof, void *data)
 263 {
 264         drm_device_t *dev = (drm_device_t *)data;
 265         int          ret;
 266
 267         down(&dev->struct_sem);
 268         ret = drm__vm_info(buf, start, offset, request, eof, data);
 269         up(&dev->struct_sem);
 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         drm_device_t *dev = (drm_device_t *)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->write_queue) ? 'w':'-',
 318                                    waitqueue_active(&q->flush_queue) ? 'f':'-',
 319                                    DRM_BUFCOUNT(&q->waitlist));
 320                 atomic_dec(&q->use_count);
 321         }
 322
 323         if (len > request + offset) return request;
 324         *eof = 1;
 325         return len - offset;
 326 }
 327
 328 /**
 329  * Simply calls _queues_info() while holding the drm_device::struct_sem lock.
 330  */
 331 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
 332                             int *eof, void *data)
 333 {
 334         drm_device_t *dev = (drm_device_t *)data;
 335         int          ret;
 336
 337         down(&dev->struct_sem);
 338         ret = drm__queues_info(buf, start, offset, request, eof, data);
 339         up(&dev->struct_sem);
 340         return ret;
 341 }
 342
 343 /**
 344  * Called when "/proc/dri/.../bufs" is read.
 345  *
 346  * \param buf output buffer.
 347  * \param start start of output data.
 348  * \param offset requested start offset.
 349  * \param request requested number of bytes.
 350  * \param eof whether there is no more data to return.
 351  * \param data private data.
 352  * \return number of written bytes.
 353  */
 354 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
 355                            int *eof, void *data)
 356 {
 357         drm_device_t     *dev = (drm_device_t *)data;
 358         int              len  = 0;
 359         drm_device_dma_t *dma = dev->dma;
 360         int              i;
 361
 362         if (!dma || offset > DRM_PROC_LIMIT) {
 363                 *eof = 1;
 364                 return 0;
 365         }
 366
 367         *start = &buf[offset];
 368         *eof   = 0;
 369
 370         DRM_PROC_PRINT(" o     size count  free  segs pages    kB\n\n");
 371         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 372                 if (dma->bufs[i].buf_count)
 373                         DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
 374                                        i,
 375                                        dma->bufs[i].buf_size,
 376                                        dma->bufs[i].buf_count,
 377                                        atomic_read(&dma->bufs[i]
 378                                                    .freelist.count),
 379                                        dma->bufs[i].seg_count,
 380                                        dma->bufs[i].seg_count
 381                                        *(1 << dma->bufs[i].page_order),
 382                                        (dma->bufs[i].seg_count
 383                                         * (1 << dma->bufs[i].page_order))
 384                                        * PAGE_SIZE / 1024);
 385         }
 386         DRM_PROC_PRINT("\n");
 387         for (i = 0; i < dma->buf_count; i++) {
 388                 if (i && !(i%32)) DRM_PROC_PRINT("\n");
 389                 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
 390         }
 391         DRM_PROC_PRINT("\n");
 392
 393         if (len > request + offset) return request;
 394         *eof = 1;
 395         return len - offset;
 396 }
 397
 398 /**
 399  * Simply calls _bufs_info() while holding the drm_device::struct_sem lock.
 400  */
 401 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
 402                           int *eof, void *data)
 403 {
 404         drm_device_t *dev = (drm_device_t *)data;
 405         int          ret;
 406
 407         down(&dev->struct_sem);
 408         ret = drm__bufs_info(buf, start, offset, request, eof, data);
 409         up(&dev->struct_sem);
 410         return ret;
 411 }
 412
 413 /**
 414  * Called when "/proc/dri/.../clients" is read.
 415  *
 416  * \param buf output buffer.
 417  * \param start start of output data.
 418  * \param offset requested start offset.
 419  * \param request requested number of bytes.
 420  * \param eof whether there is no more data to return.
 421  * \param data private data.
 422  * \return number of written bytes.
 423  */
 424 static int drm__clients_info(char *buf, char **start, off_t offset,
 425                               int request, int *eof, void *data)
 426 {
 427         drm_device_t *dev = (drm_device_t *)data;
 428         int          len  = 0;
 429         drm_file_t   *priv;
 430
 431         if (offset > DRM_PROC_LIMIT) {
 432                 *eof = 1;
 433                 return 0;
 434         }
 435
 436         *start = &buf[offset];
 437         *eof   = 0;
 438
 439         DRM_PROC_PRINT("a dev   pid    uid      magic     ioctls\n\n");
 440         for (priv = dev->file_first; priv; priv = priv->next) {
 441                 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
 442                                priv->authenticated ? 'y' : 'n',
 443                                priv->minor,
 444                                priv->pid,
 445                                priv->uid,
 446                                priv->magic,
 447                                priv->ioctl_count);
 448         }
 449
 450         if (len > request + offset) return request;
 451         *eof = 1;
 452         return len - offset;
 453 }
 454
 455 /**
 456  * Simply calls _clients_info() while holding the drm_device::struct_sem lock.
 457  */
 458 static int drm_clients_info(char *buf, char **start, off_t offset,
 459                              int request, int *eof, void *data)
 460 {
 461         drm_device_t *dev = (drm_device_t *)data;
 462         int          ret;
 463
 464         down(&dev->struct_sem);
 465         ret = drm__clients_info(buf, start, offset, request, eof, data);
 466         up(&dev->struct_sem);
 467         return ret;
 468 }
 469
 470 #if DRM_DEBUG_CODE
 471
 472 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
 473                           int *eof, void *data)
 474 {
 475         drm_device_t          *dev = (drm_device_t *)data;
 476         int                   len  = 0;
 477         drm_vma_entry_t       *pt;
 478         struct vm_area_struct *vma;
 479 #if defined(__i386__)
 480         unsigned int          pgprot;
 481 #endif
 482
 483         if (offset > DRM_PROC_LIMIT) {
 484                 *eof = 1;
 485                 return 0;
 486         }
 487
 488         *start = &buf[offset];
 489         *eof   = 0;
 490
 491         DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
 492                        atomic_read(&dev->vma_count),
 493                        high_memory, virt_to_phys(high_memory));
 494         for (pt = dev->vmalist; pt; pt = pt->next) {
 495                 if (!(vma = pt->vma)) continue;
 496                 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx",
 497                                pt->pid,
 498                                vma->vm_start,
 499                                vma->vm_end,
 500                                vma->vm_flags & VM_READ     ? 'r' : '-',
 501                                vma->vm_flags & VM_WRITE    ? 'w' : '-',
 502                                vma->vm_flags & VM_EXEC     ? 'x' : '-',
 503                                vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 504                                vma->vm_flags & VM_LOCKED   ? 'l' : '-',
 505                                vma->vm_flags & VM_IO       ? 'i' : '-',
 506                                VM_OFFSET(vma));
 507
 508 #if defined(__i386__)
 509                 pgprot = pgprot_val(vma->vm_page_prot);
 510                 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
 511                                pgprot & _PAGE_PRESENT  ? 'p' : '-',
 512                                pgprot & _PAGE_RW       ? 'w' : 'r',
 513                                pgprot & _PAGE_USER     ? 'u' : 's',
 514                                pgprot & _PAGE_PWT      ? 't' : 'b',
 515                                pgprot & _PAGE_PCD      ? 'u' : 'c',
 516                                pgprot & _PAGE_ACCESSED ? 'a' : '-',
 517                                pgprot & _PAGE_DIRTY    ? 'd' : '-',
 518                                pgprot & _PAGE_PSE      ? 'm' : 'k',
 519                                pgprot & _PAGE_GLOBAL   ? 'g' : 'l' );
 520 #endif
 521                 DRM_PROC_PRINT("\n");
 522         }
 523
 524         if (len > request + offset) return request;
 525         *eof = 1;
 526         return len - offset;
 527 }
 528
 529 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
 530                          int *eof, void *data)
 531 {
 532         drm_device_t *dev = (drm_device_t *)data;
 533         int          ret;
 534
 535         down(&dev->struct_sem);
 536         ret = drm__vma_info(buf, start, offset, request, eof, data);
 537         up(&dev->struct_sem);
 538         return ret;
 539 }
 540 #endif
 541
 542