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_minor *minor, int minor_id,
  91                   struct proc_dir_entry *root)
  92 {
  93         struct proc_dir_entry *ent;
  94         int i, j;
  95         char name[64];
  96
  97         sprintf(name, "%d", minor_id);
  98         minor->dev_root = proc_mkdir(name, root);
  99         if (!minor->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, minor->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                                                   minor->dev_root);
 113                         remove_proc_entry(name, root);
 114                         minor->dev_root = NULL;
 115                         return -1;
 116                 }
 117                 ent->read_proc = drm_proc_list[i].f;
 118                 ent->data = minor;
 119         }
 120
 121         return 0;
 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(struct drm_minor *minor, struct proc_dir_entry *root)
 135 {
 136         int i;
 137         char name[64];
 138
 139         if (!root || !minor->dev_root)
 140                 return 0;
 141
 142         for (i = 0; i < DRM_PROC_ENTRIES; i++)
 143                 remove_proc_entry(drm_proc_list[i].name, minor->dev_root);
 144         sprintf(name, "%d", minor->index);
 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_minor *minor = (struct drm_minor *) data;
 167         struct drm_device *dev = minor->dev;
 168         int len = 0;
 169
 170         if (offset > DRM_PROC_LIMIT) {
 171                 *eof = 1;
 172                 return 0;
 173         }
 174
 175         *start = &buf[offset];
 176         *eof = 0;
 177
 178         if (dev->unique) {
 179                 DRM_PROC_PRINT("%s %s %s\n",
 180                                dev->driver->pci_driver.name,
 181                                pci_name(dev->pdev), dev->unique);
 182         } else {
 183                 DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name,
 184                                pci_name(dev->pdev));
 185         }
 186
 187         if (len > request + offset)
 188                 return request;
 189         *eof = 1;
 190         return len - offset;
 191 }
 192
 193 /**
 194  * Called when "/proc/dri/.../vm" is read.
 195  *
 196  * \param buf output buffer.
 197  * \param start start of output data.
 198  * \param offset requested start offset.
 199  * \param request requested number of bytes.
 200  * \param eof whether there is no more data to return.
 201  * \param data private data.
 202  * \return number of written bytes.
 203  *
 204  * Prints information about all mappings in drm_device::maplist.
 205  */
 206 static int drm__vm_info(char *buf, char **start, off_t offset, int request,
 207                         int *eof, void *data)
 208 {
 209         struct drm_minor *minor = (struct drm_minor *) data;
 210         struct drm_device *dev = minor->dev;
 211         int len = 0;
 212         struct drm_map *map;
 213         struct drm_map_list *r_list;
 214
 215         /* Hardcoded from _DRM_FRAME_BUFFER,
 216            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 217            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 218         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 219         const char *type;
 220         int i;
 221
 222         if (offset > DRM_PROC_LIMIT) {
 223                 *eof = 1;
 224                 return 0;
 225         }
 226
 227         *start = &buf[offset];
 228         *eof = 0;
 229
 230         DRM_PROC_PRINT("slot     offset       size type flags    "
 231                        "address mtrr\n\n");
 232         i = 0;
 233         list_for_each_entry(r_list, &dev->maplist, head) {
 234                 map = r_list->map;
 235                 if (!map)
 236                         continue;
 237                 if (map->type < 0 || map->type > 5)
 238                         type = "??";
 239                 else
 240                         type = types[map->type];
 241                 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 242                                i,
 243                                map->offset,
 244                                map->size, type, map->flags,
 245                                (unsigned long) r_list->user_token);
 246                 if (map->mtrr < 0) {
 247                         DRM_PROC_PRINT("none\n");
 248                 } else {
 249                         DRM_PROC_PRINT("%4d\n", map->mtrr);
 250                 }
 251                 i++;
 252         }
 253
 254         if (len > request + offset)
 255                 return request;
 256         *eof = 1;
 257         return len - offset;
 258 }
 259
 260 /**
 261  * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
 262  */
 263 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
 264                        int *eof, void *data)
 265 {
 266         struct drm_minor *minor = (struct drm_minor *) data;
 267         struct drm_device *dev = minor->dev;
 268         int ret;
 269
 270         mutex_lock(&dev->struct_mutex);
 271         ret = drm__vm_info(buf, start, offset, request, eof, data);
 272         mutex_unlock(&dev->struct_mutex);
 273         return ret;
 274 }
 275
 276 /**
 277  * Called when "/proc/dri/.../queues" is read.
 278  *
 279  * \param buf output buffer.
 280  * \param start start of output data.
 281  * \param offset requested start offset.
 282  * \param request requested number of bytes.
 283  * \param eof whether there is no more data to return.
 284  * \param data private data.
 285  * \return number of written bytes.
 286  */
 287 static int drm__queues_info(char *buf, char **start, off_t offset,
 288                             int request, int *eof, void *data)
 289 {
 290         struct drm_minor *minor = (struct drm_minor *) data;
 291         struct drm_device *dev = minor->dev;
 292         int len = 0;
 293         int i;
 294         struct drm_queue *q;
 295
 296         if (offset > DRM_PROC_LIMIT) {
 297                 *eof = 1;
 298                 return 0;
 299         }
 300
 301         *start = &buf[offset];
 302         *eof = 0;
 303
 304         DRM_PROC_PRINT("  ctx/flags   use   fin"
 305                        "   blk/rw/rwf  wait    flushed     queued"
 306                        "      locks\n\n");
 307         for (i = 0; i < dev->queue_count; i++) {
 308                 q = dev->queuelist[i];
 309                 atomic_inc(&q->use_count);
 310                 DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
 311                                    "%5d/0x%03x %5d %5d"
 312                                    " %5d/%c%c/%c%c%c %5Zd\n",
 313                                    i,
 314                                    q->flags,
 315                                    atomic_read(&q->use_count),
 316                                    atomic_read(&q->finalization),
 317                                    atomic_read(&q->block_count),
 318                                    atomic_read(&q->block_read) ? 'r' : '-',
 319                                    atomic_read(&q->block_write) ? 'w' : '-',
 320                                    waitqueue_active(&q->read_queue) ? 'r' : '-',
 321                                    waitqueue_active(&q->
 322                                                     write_queue) ? 'w' : '-',
 323                                    waitqueue_active(&q->
 324                                                     flush_queue) ? 'f' : '-',
 325                                    DRM_BUFCOUNT(&q->waitlist));
 326                 atomic_dec(&q->use_count);
 327         }
 328
 329         if (len > request + offset)
 330                 return request;
 331         *eof = 1;
 332         return len - offset;
 333 }
 334
 335 /**
 336  * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
 337  */
 338 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
 339                            int *eof, void *data)
 340 {
 341         struct drm_minor *minor = (struct drm_minor *) data;
 342         struct drm_device *dev = minor->dev;
 343         int ret;
 344
 345         mutex_lock(&dev->struct_mutex);
 346         ret = drm__queues_info(buf, start, offset, request, eof, data);
 347         mutex_unlock(&dev->struct_mutex);
 348         return ret;
 349 }
 350
 351 /**
 352  * Called when "/proc/dri/.../bufs" is read.
 353  *
 354  * \param buf output buffer.
 355  * \param start start of output data.
 356  * \param offset requested start offset.
 357  * \param request requested number of bytes.
 358  * \param eof whether there is no more data to return.
 359  * \param data private data.
 360  * \return number of written bytes.
 361  */
 362 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
 363                           int *eof, void *data)
 364 {
 365         struct drm_minor *minor = (struct drm_minor *) data;
 366         struct drm_device *dev = minor->dev;
 367         int len = 0;
 368         struct drm_device_dma *dma = dev->dma;
 369         int i;
 370
 371         if (!dma || offset > DRM_PROC_LIMIT) {
 372                 *eof = 1;
 373                 return 0;
 374         }
 375
 376         *start = &buf[offset];
 377         *eof = 0;
 378
 379         DRM_PROC_PRINT(" o     size count  free  segs pages    kB\n\n");
 380         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 381                 if (dma->bufs[i].buf_count)
 382                         DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
 383                                        i,
 384                                        dma->bufs[i].buf_size,
 385                                        dma->bufs[i].buf_count,
 386                                        atomic_read(&dma->bufs[i]
 387                                                    .freelist.count),
 388                                        dma->bufs[i].seg_count,
 389                                        dma->bufs[i].seg_count
 390                                        * (1 << dma->bufs[i].page_order),
 391                                        (dma->bufs[i].seg_count
 392                                         * (1 << dma->bufs[i].page_order))
 393                                        * PAGE_SIZE / 1024);
 394         }
 395         DRM_PROC_PRINT("\n");
 396         for (i = 0; i < dma->buf_count; i++) {
 397                 if (i && !(i % 32))
 398                         DRM_PROC_PRINT("\n");
 399                 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
 400         }
 401         DRM_PROC_PRINT("\n");
 402
 403         if (len > request + offset)
 404                 return request;
 405         *eof = 1;
 406         return len - offset;
 407 }
 408
 409 /**
 410  * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
 411  */
 412 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
 413                          int *eof, void *data)
 414 {
 415         struct drm_minor *minor = (struct drm_minor *) data;
 416         struct drm_device *dev = minor->dev;
 417         int ret;
 418
 419         mutex_lock(&dev->struct_mutex);
 420         ret = drm__bufs_info(buf, start, offset, request, eof, data);
 421         mutex_unlock(&dev->struct_mutex);
 422         return ret;
 423 }
 424
 425 /**
 426  * Called when "/proc/dri/.../clients" is read.
 427  *
 428  * \param buf output buffer.
 429  * \param start start of output data.
 430  * \param offset requested start offset.
 431  * \param request requested number of bytes.
 432  * \param eof whether there is no more data to return.
 433  * \param data private data.
 434  * \return number of written bytes.
 435  */
 436 static int drm__clients_info(char *buf, char **start, off_t offset,
 437                              int request, int *eof, void *data)
 438 {
 439         struct drm_minor *minor = (struct drm_minor *) data;
 440         struct drm_device *dev = minor->dev;
 441         int len = 0;
 442         struct drm_file *priv;
 443
 444         if (offset > DRM_PROC_LIMIT) {
 445                 *eof = 1;
 446                 return 0;
 447         }
 448
 449         *start = &buf[offset];
 450         *eof = 0;
 451
 452         DRM_PROC_PRINT("a dev   pid    uid      magic     ioctls\n\n");
 453         list_for_each_entry(priv, &dev->filelist, lhead) {
 454                 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
 455                                priv->authenticated ? 'y' : 'n',
 456                                priv->minor->index,
 457                                priv->pid,
 458                                priv->uid, priv->magic, priv->ioctl_count);
 459         }
 460
 461         if (len > request + offset)
 462                 return request;
 463         *eof = 1;
 464         return len - offset;
 465 }
 466
 467 /**
 468  * Simply calls _clients_info() while holding the drm_device::struct_mutex lock.
 469  */
 470 static int drm_clients_info(char *buf, char **start, off_t offset,
 471                             int request, int *eof, void *data)
 472 {
 473         struct drm_minor *minor = (struct drm_minor *) data;
 474         struct drm_device *dev = minor->dev;
 475         int ret;
 476
 477         mutex_lock(&dev->struct_mutex);
 478         ret = drm__clients_info(buf, start, offset, request, eof, data);
 479         mutex_unlock(&dev->struct_mutex);
 480         return ret;
 481 }
 482
 483 #if DRM_DEBUG_CODE
 484
 485 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
 486                          int *eof, void *data)
 487 {
 488         struct drm_minor *minor = (struct drm_minor *) data;
 489         struct drm_device *dev = minor->dev;
 490         int len = 0;
 491         struct drm_vma_entry *pt;
 492         struct vm_area_struct *vma;
 493 #if defined(__i386__)
 494         unsigned int pgprot;
 495 #endif
 496
 497         if (offset > DRM_PROC_LIMIT) {
 498                 *eof = 1;
 499                 return 0;
 500         }
 501
 502         *start = &buf[offset];
 503         *eof = 0;
 504
 505         DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
 506                        atomic_read(&dev->vma_count),
 507                        high_memory, virt_to_phys(high_memory));
 508         list_for_each_entry(pt, &dev->vmalist, head) {
 509                 if (!(vma = pt->vma))
 510                         continue;
 511                 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
 512                                pt->pid,
 513                                vma->vm_start,
 514                                vma->vm_end,
 515                                vma->vm_flags & VM_READ ? 'r' : '-',
 516                                vma->vm_flags & VM_WRITE ? 'w' : '-',
 517                                vma->vm_flags & VM_EXEC ? 'x' : '-',
 518                                vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 519                                vma->vm_flags & VM_LOCKED ? 'l' : '-',
 520                                vma->vm_flags & VM_IO ? 'i' : '-',
 521                                vma->vm_pgoff);
 522
 523 #if defined(__i386__)
 524                 pgprot = pgprot_val(vma->vm_page_prot);
 525                 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
 526                                pgprot & _PAGE_PRESENT ? 'p' : '-',
 527                                pgprot & _PAGE_RW ? 'w' : 'r',
 528                                pgprot & _PAGE_USER ? 'u' : 's',
 529                                pgprot & _PAGE_PWT ? 't' : 'b',
 530                                pgprot & _PAGE_PCD ? 'u' : 'c',
 531                                pgprot & _PAGE_ACCESSED ? 'a' : '-',
 532                                pgprot & _PAGE_DIRTY ? 'd' : '-',
 533                                pgprot & _PAGE_PSE ? 'm' : 'k',
 534                                pgprot & _PAGE_GLOBAL ? 'g' : 'l');
 535 #endif
 536                 DRM_PROC_PRINT("\n");
 537         }
 538
 539         if (len > request + offset)
 540                 return request;
 541         *eof = 1;
 542         return len - offset;
 543 }
 544
 545 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
 546                         int *eof, void *data)
 547 {
 548         struct drm_minor *minor = (struct drm_minor *) data;
 549         struct drm_device *dev = minor->dev;
 550         int ret;
 551
 552         mutex_lock(&dev->struct_mutex);
 553         ret = drm__vma_info(buf, start, offset, request, eof, data);
 554         mutex_unlock(&dev->struct_mutex);
 555         return ret;
 556 }
 557 #endif