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 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. */
 214         const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG" };
 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) continue;
 233                 if (map->type < 0 || map->type > 4) type = "??";
 234                 else                                type = types[map->type];
 235                 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 236                                i,
 237                                map->offset,
 238                                map->size,
 239                                type,
 240                                map->flags,
 241                                (unsigned long)map->handle);
 242                 if (map->mtrr < 0) {
 243                         DRM_PROC_PRINT("none\n");
 244                 } else {
 245                         DRM_PROC_PRINT("%4d\n", map->mtrr);
 246                 }
 247                 i++;
 248         }
 249
 250         if (len > request + offset) return request;
 251         *eof = 1;
 252         return len - offset;
 253 }
 254
 255 /**
 256  * Simply calls _vm_info() while holding the drm_device::struct_sem lock.
 257  */
 258 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
 259                         int *eof, void *data)
 260 {
 261         drm_device_t *dev = (drm_device_t *)data;
 262         int          ret;
 263
 264         down(&dev->struct_sem);
 265         ret = drm__vm_info(buf, start, offset, request, eof, data);
 266         up(&dev->struct_sem);
 267         return ret;
 268 }
 269
 270 /**
 271  * Called when "/proc/dri/.../queues" is read.
 272  *
 273  * \param buf output buffer.
 274  * \param start start of output data.
 275  * \param offset requested start offset.
 276  * \param request requested number of bytes.
 277  * \param eof whether there is no more data to return.
 278  * \param data private data.
 279  * \return number of written bytes.
 280  */
 281 static int drm__queues_info(char *buf, char **start, off_t offset,
 282                              int request, int *eof, void *data)
 283 {
 284         drm_device_t *dev = (drm_device_t *)data;
 285         int          len  = 0;
 286         int          i;
 287         drm_queue_t  *q;
 288
 289         if (offset > DRM_PROC_LIMIT) {
 290                 *eof = 1;
 291                 return 0;
 292         }
 293
 294         *start = &buf[offset];
 295         *eof   = 0;
 296
 297         DRM_PROC_PRINT("  ctx/flags   use   fin"
 298                        "   blk/rw/rwf  wait    flushed     queued"
 299                        "      locks\n\n");
 300         for (i = 0; i < dev->queue_count; i++) {
 301                 q = dev->queuelist[i];
 302                 atomic_inc(&q->use_count);
 303                 DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
 304                                    "%5d/0x%03x %5d %5d"
 305                                    " %5d/%c%c/%c%c%c %5Zd\n",
 306                                    i,
 307                                    q->flags,
 308                                    atomic_read(&q->use_count),
 309                                    atomic_read(&q->finalization),
 310                                    atomic_read(&q->block_count),
 311                                    atomic_read(&q->block_read) ? 'r' : '-',
 312                                    atomic_read(&q->block_write) ? 'w' : '-',
 313                                    waitqueue_active(&q->read_queue) ? 'r':'-',
 314                                    waitqueue_active(&q->write_queue) ? 'w':'-',
 315                                    waitqueue_active(&q->flush_queue) ? 'f':'-',
 316                                    DRM_BUFCOUNT(&q->waitlist));
 317                 atomic_dec(&q->use_count);
 318         }
 319
 320         if (len > request + offset) return request;
 321         *eof = 1;
 322         return len - offset;
 323 }
 324
 325 /**
 326  * Simply calls _queues_info() while holding the drm_device::struct_sem lock.
 327  */
 328 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
 329                             int *eof, void *data)
 330 {
 331         drm_device_t *dev = (drm_device_t *)data;
 332         int          ret;
 333
 334         down(&dev->struct_sem);
 335         ret = drm__queues_info(buf, start, offset, request, eof, data);
 336         up(&dev->struct_sem);
 337         return ret;
 338 }
 339
 340 /**
 341  * Called when "/proc/dri/.../bufs" is read.
 342  *
 343  * \param buf output buffer.
 344  * \param start start of output data.
 345  * \param offset requested start offset.
 346  * \param request requested number of bytes.
 347  * \param eof whether there is no more data to return.
 348  * \param data private data.
 349  * \return number of written bytes.
 350  */
 351 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
 352                            int *eof, void *data)
 353 {
 354         drm_device_t     *dev = (drm_device_t *)data;
 355         int              len  = 0;
 356         drm_device_dma_t *dma = dev->dma;
 357         int              i;
 358
 359         if (!dma || offset > DRM_PROC_LIMIT) {
 360                 *eof = 1;
 361                 return 0;
 362         }
 363
 364         *start = &buf[offset];
 365         *eof   = 0;
 366
 367         DRM_PROC_PRINT(" o     size count  free  segs pages    kB\n\n");
 368         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 369                 if (dma->bufs[i].buf_count)
 370                         DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
 371                                        i,
 372                                        dma->bufs[i].buf_size,
 373                                        dma->bufs[i].buf_count,
 374                                        atomic_read(&dma->bufs[i]
 375                                                    .freelist.count),
 376                                        dma->bufs[i].seg_count,
 377                                        dma->bufs[i].seg_count
 378                                        *(1 << dma->bufs[i].page_order),
 379                                        (dma->bufs[i].seg_count
 380                                         * (1 << dma->bufs[i].page_order))
 381                                        * PAGE_SIZE / 1024);
 382         }
 383         DRM_PROC_PRINT("\n");
 384         for (i = 0; i < dma->buf_count; i++) {
 385                 if (i && !(i%32)) DRM_PROC_PRINT("\n");
 386                 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
 387         }
 388         DRM_PROC_PRINT("\n");
 389
 390         if (len > request + offset) return request;
 391         *eof = 1;
 392         return len - offset;
 393 }
 394
 395 /**
 396  * Simply calls _bufs_info() while holding the drm_device::struct_sem lock.
 397  */
 398 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
 399                           int *eof, void *data)
 400 {
 401         drm_device_t *dev = (drm_device_t *)data;
 402         int          ret;
 403
 404         down(&dev->struct_sem);
 405         ret = drm__bufs_info(buf, start, offset, request, eof, data);
 406         up(&dev->struct_sem);
 407         return ret;
 408 }
 409
 410 /**
 411  * Called when "/proc/dri/.../clients" is read.
 412  *
 413  * \param buf output buffer.
 414  * \param start start of output data.
 415  * \param offset requested start offset.
 416  * \param request requested number of bytes.
 417  * \param eof whether there is no more data to return.
 418  * \param data private data.
 419  * \return number of written bytes.
 420  */
 421 static int drm__clients_info(char *buf, char **start, off_t offset,
 422                               int request, int *eof, void *data)
 423 {
 424         drm_device_t *dev = (drm_device_t *)data;
 425         int          len  = 0;
 426         drm_file_t   *priv;
 427
 428         if (offset > DRM_PROC_LIMIT) {
 429                 *eof = 1;
 430                 return 0;
 431         }
 432
 433         *start = &buf[offset];
 434         *eof   = 0;
 435
 436         DRM_PROC_PRINT("a dev   pid    uid      magic     ioctls\n\n");
 437         for (priv = dev->file_first; priv; priv = priv->next) {
 438                 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
 439                                priv->authenticated ? 'y' : 'n',
 440                                priv->minor,
 441                                priv->pid,
 442                                priv->uid,
 443                                priv->magic,
 444                                priv->ioctl_count);
 445         }
 446
 447         if (len > request + offset) return request;
 448         *eof = 1;
 449         return len - offset;
 450 }
 451
 452 /**
 453  * Simply calls _clients_info() while holding the drm_device::struct_sem lock.
 454  */
 455 static int drm_clients_info(char *buf, char **start, off_t offset,
 456                              int request, int *eof, void *data)
 457 {
 458         drm_device_t *dev = (drm_device_t *)data;
 459         int          ret;
 460
 461         down(&dev->struct_sem);
 462         ret = drm__clients_info(buf, start, offset, request, eof, data);
 463         up(&dev->struct_sem);
 464         return ret;
 465 }
 466
 467 #if DRM_DEBUG_CODE
 468
 469 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
 470                           int *eof, void *data)
 471 {
 472         drm_device_t          *dev = (drm_device_t *)data;
 473         int                   len  = 0;
 474         drm_vma_entry_t       *pt;
 475         struct vm_area_struct *vma;
 476 #if defined(__i386__)
 477         unsigned int          pgprot;
 478 #endif
 479
 480         if (offset > DRM_PROC_LIMIT) {
 481                 *eof = 1;
 482                 return 0;
 483         }
 484
 485         *start = &buf[offset];
 486         *eof   = 0;
 487
 488         DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
 489                        atomic_read(&dev->vma_count),
 490                        high_memory, virt_to_phys(high_memory));
 491         for (pt = dev->vmalist; pt; pt = pt->next) {
 492                 if (!(vma = pt->vma)) continue;
 493                 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx",
 494                                pt->pid,
 495                                vma->vm_start,
 496                                vma->vm_end,
 497                                vma->vm_flags & VM_READ     ? 'r' : '-',
 498                                vma->vm_flags & VM_WRITE    ? 'w' : '-',
 499                                vma->vm_flags & VM_EXEC     ? 'x' : '-',
 500                                vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 501                                vma->vm_flags & VM_LOCKED   ? 'l' : '-',
 502                                vma->vm_flags & VM_IO       ? 'i' : '-',
 503                                VM_OFFSET(vma));
 504
 505 #if defined(__i386__)
 506                 pgprot = pgprot_val(vma->vm_page_prot);
 507                 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
 508                                pgprot & _PAGE_PRESENT  ? 'p' : '-',
 509                                pgprot & _PAGE_RW       ? 'w' : 'r',
 510                                pgprot & _PAGE_USER     ? 'u' : 's',
 511                                pgprot & _PAGE_PWT      ? 't' : 'b',
 512                                pgprot & _PAGE_PCD      ? 'u' : 'c',
 513                                pgprot & _PAGE_ACCESSED ? 'a' : '-',
 514                                pgprot & _PAGE_DIRTY    ? 'd' : '-',
 515                                pgprot & _PAGE_PSE      ? 'm' : 'k',
 516                                pgprot & _PAGE_GLOBAL   ? 'g' : 'l' );
 517 #endif
 518                 DRM_PROC_PRINT("\n");
 519         }
 520
 521         if (len > request + offset) return request;
 522         *eof = 1;
 523         return len - offset;
 524 }
 525
 526 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
 527                          int *eof, void *data)
 528 {
 529         drm_device_t *dev = (drm_device_t *)data;
 530         int          ret;
 531
 532         down(&dev->struct_sem);
 533         ret = drm__vma_info(buf, start, offset, request, eof, data);
 534         up(&dev->struct_sem);
 535         return ret;
 536 }
 537 #endif
 538
 539