sys/dev/drm/drm_sysctl.c

   1 /*-
   2  * Copyright 2003 Eric Anholt
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * ERIC ANHOLT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  20  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * $FreeBSD: src/sys/dev/drm2/drm_sysctl.c,v 1.1 2012/05/22 11:07:44 kib Exp $
  24  */
  25
  26 /** @file drm_sysctl.c
  27  * Implementation of various sysctls for controlling DRM behavior and reporting
  28  * debug information.
  29  */
  30
  31 #include <sys/conf.h>
  32 #include <sys/sysctl.h>
  33 #include <sys/types.h>
  34
  35 #include <drm/drmP.h>
  36
  37 static int         drm_name_info DRM_SYSCTL_HANDLER_ARGS;
  38 static int         drm_vm_info DRM_SYSCTL_HANDLER_ARGS;
  39 static int         drm_clients_info DRM_SYSCTL_HANDLER_ARGS;
  40 static int         drm_bufs_info DRM_SYSCTL_HANDLER_ARGS;
  41 static int         drm_vblank_info DRM_SYSCTL_HANDLER_ARGS;
  42
  43 struct drm_sysctl_list {
  44         const char *name;
  45         int        (*f) DRM_SYSCTL_HANDLER_ARGS;
  46 } drm_sysctl_list[] = {
  47         {"name",    drm_name_info},
  48         {"vm",      drm_vm_info},
  49         {"clients", drm_clients_info},
  50         {"bufs",    drm_bufs_info},
  51         {"vblank",    drm_vblank_info},
  52 };
  53 #define DRM_SYSCTL_ENTRIES NELEM(drm_sysctl_list)
  54
  55 struct drm_sysctl_info {
  56         struct sysctl_ctx_list ctx;
  57         char                   name[2];
  58 };
  59
  60 int drm_sysctl_init(struct drm_device *dev)
  61 {
  62         struct drm_sysctl_info *info;
  63         struct sysctl_oid *oid;
  64         struct sysctl_oid *top, *drioid;
  65         int               i;
  66
  67         info = kmalloc(sizeof *info, DRM_MEM_DRIVER, M_WAITOK | M_ZERO);
  68         if ( !info )
  69                 return 1;
  70         dev->sysctl = info;
  71
  72         /* Add the sysctl node for DRI if it doesn't already exist */
  73         drioid = SYSCTL_ADD_NODE(&info->ctx, &sysctl__hw_children, OID_AUTO,
  74             "dri", CTLFLAG_RW, NULL, "DRI Graphics");
  75         if (!drioid)
  76                 return 1;
  77
  78         /* Find the next free slot under hw.dri */
  79         i = 0;
  80         SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
  81                 if (i <= oid->oid_arg2)
  82                         i = oid->oid_arg2 + 1;
  83         }
  84         if (i>9)
  85                 return 1;
  86
  87         dev->sysctl_node_idx = i;
  88         /* Add the hw.dri.x for our device */
  89         info->name[0] = '0' + i;
  90         info->name[1] = 0;
  91         top = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(drioid),
  92             OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
  93         if (!top)
  94                 return 1;
  95
  96         for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
  97                 oid = SYSCTL_ADD_OID(&info->ctx,
  98                         SYSCTL_CHILDREN(top),
  99                         OID_AUTO,
 100                         drm_sysctl_list[i].name,
 101                         CTLTYPE_STRING | CTLFLAG_RD,
 102                         dev,
 103                         0,
 104                         drm_sysctl_list[i].f,
 105                         "A",
 106                         NULL);
 107                 if (!oid)
 108                         return 1;
 109         }
 110         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "debug",
 111             CTLFLAG_RW, &drm_debug_flag, sizeof(drm_debug_flag),
 112             "Enable debugging output");
 113         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "notyet",
 114             CTLFLAG_RW, &drm_notyet_flag, sizeof(drm_debug_flag),
 115             "Enable notyet reminders");
 116
 117         if (dev->driver->sysctl_init != NULL)
 118                 dev->driver->sysctl_init(dev, &info->ctx, top);
 119
 120         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
 121             "vblank_offdelay", CTLFLAG_RW, &drm_vblank_offdelay,
 122             sizeof(drm_vblank_offdelay),
 123             "");
 124         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
 125             "timestamp_precision", CTLFLAG_RW, &drm_timestamp_precision,
 126             sizeof(drm_timestamp_precision),
 127             "");
 128
 129         return (0);
 130 }
 131
 132 int drm_sysctl_cleanup(struct drm_device *dev)
 133 {
 134         int error;
 135
 136         error = sysctl_ctx_free(&dev->sysctl->ctx);
 137         drm_free(dev->sysctl, DRM_MEM_DRIVER);
 138         dev->sysctl = NULL;
 139         if (dev->driver->sysctl_cleanup != NULL)
 140                 dev->driver->sysctl_cleanup(dev);
 141
 142         return (error);
 143 }
 144
 145 #define DRM_SYSCTL_PRINT(fmt, arg...)                           \
 146 do {                                                            \
 147         ksnprintf(buf, sizeof(buf), fmt, ##arg);                        \
 148         retcode = SYSCTL_OUT(req, buf, strlen(buf));            \
 149         if (retcode)                                            \
 150                 goto done;                                      \
 151 } while (0)
 152
 153 static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
 154 {
 155         struct drm_device *dev = arg1;
 156         char buf[128];
 157         int retcode;
 158         int hasunique = 0;
 159
 160         DRM_SYSCTL_PRINT("%s 0x%x", dev->driver->name, dev2udev(dev->devnode));
 161
 162         DRM_LOCK(dev);
 163         if (dev->unique) {
 164                 ksnprintf(buf, sizeof(buf), " %s", dev->unique);
 165                 hasunique = 1;
 166         }
 167         DRM_UNLOCK(dev);
 168
 169         if (hasunique)
 170                 SYSCTL_OUT(req, buf, strlen(buf));
 171
 172         SYSCTL_OUT(req, "", 1);
 173
 174 done:
 175         return retcode;
 176 }
 177
 178 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
 179 {
 180         struct drm_device *dev = arg1;
 181         drm_local_map_t *map, *tempmaps;
 182         const char *types[] = {
 183                 [_DRM_FRAME_BUFFER] = "FB",
 184                 [_DRM_REGISTERS] = "REG",
 185                 [_DRM_SHM] = "SHM",
 186                 [_DRM_AGP] = "AGP",
 187                 [_DRM_SCATTER_GATHER] = "SG",
 188                 [_DRM_CONSISTENT] = "CONS",
 189                 [_DRM_GEM] = "GEM"
 190         };
 191         const char *type, *yesno;
 192         int i, mapcount;
 193         char buf[128];
 194         int retcode;
 195
 196         /* We can't hold the lock while doing SYSCTL_OUTs, so allocate a
 197          * temporary copy of all the map entries and then SYSCTL_OUT that.
 198          */
 199         DRM_LOCK(dev);
 200
 201         mapcount = 0;
 202         TAILQ_FOREACH(map, &dev->maplist, link)
 203                 mapcount++;
 204
 205         tempmaps = kmalloc(sizeof(drm_local_map_t) * mapcount, DRM_MEM_DRIVER,
 206             M_NOWAIT);
 207         if (tempmaps == NULL) {
 208                 DRM_UNLOCK(dev);
 209                 return ENOMEM;
 210         }
 211
 212         i = 0;
 213         TAILQ_FOREACH(map, &dev->maplist, link)
 214                 tempmaps[i++] = *map;
 215
 216         DRM_UNLOCK(dev);
 217
 218         DRM_SYSCTL_PRINT("\nslot offset         size       "
 219             "type flags address            handle mtrr\n");
 220
 221         for (i = 0; i < mapcount; i++) {
 222                 map = &tempmaps[i];
 223
 224                 switch(map->type) {
 225                 default:
 226                         type = "??";
 227                         break;
 228                 case _DRM_FRAME_BUFFER:
 229                 case _DRM_REGISTERS:
 230                 case _DRM_SHM:
 231                 case _DRM_AGP:
 232                 case _DRM_SCATTER_GATHER:
 233                 case _DRM_CONSISTENT:
 234                 case _DRM_GEM:
 235                         type = types[map->type];
 236                         break;
 237                 }
 238
 239                 if (!map->mtrr)
 240                         yesno = "no";
 241                 else
 242                         yesno = "yes";
 243
 244                 DRM_SYSCTL_PRINT(
 245                     "%4d 0x%016lx 0x%08lx %4.4s  0x%02x 0x%016lx %6d %s\n",
 246                     i, map->offset, map->size, type, map->flags,
 247                     (unsigned long)map->virtual,
 248                     (unsigned int)((unsigned long)map->handle >>
 249                     DRM_MAP_HANDLE_SHIFT), yesno);
 250         }
 251         SYSCTL_OUT(req, "", 1);
 252
 253 done:
 254         drm_free(tempmaps, DRM_MEM_DRIVER);
 255         return retcode;
 256 }
 257
 258 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
 259 {
 260         struct drm_device        *dev = arg1;
 261         drm_device_dma_t *dma = dev->dma;
 262         drm_device_dma_t tempdma;
 263         int *templists;
 264         int i;
 265         char buf[128];
 266         int retcode;
 267
 268         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
 269          * copy of the whole structure and the relevant data from buflist.
 270          */
 271         DRM_LOCK(dev);
 272         if (dma == NULL) {
 273                 DRM_UNLOCK(dev);
 274                 return 0;
 275         }
 276         spin_lock(&dev->dma_lock);
 277         tempdma = *dma;
 278         templists = kmalloc(sizeof(int) * dma->buf_count, DRM_MEM_DRIVER,
 279             M_NOWAIT);
 280         for (i = 0; i < dma->buf_count; i++)
 281                 templists[i] = dma->buflist[i]->list;
 282         dma = &tempdma;
 283         spin_unlock(&dev->dma_lock);
 284         DRM_UNLOCK(dev);
 285
 286         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
 287         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 288                 if (dma->bufs[i].buf_count)
 289                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
 290                                        i,
 291                                        dma->bufs[i].buf_size,
 292                                        dma->bufs[i].buf_count,
 293                                        atomic_read(&dma->bufs[i]
 294                                                    .freelist.count),
 295                                        dma->bufs[i].seg_count,
 296                                        dma->bufs[i].seg_count
 297                                        *(1 << dma->bufs[i].page_order),
 298                                        (dma->bufs[i].seg_count
 299                                         * (1 << dma->bufs[i].page_order))
 300                                        * (int)PAGE_SIZE / 1024);
 301         }
 302         DRM_SYSCTL_PRINT("\n");
 303         for (i = 0; i < dma->buf_count; i++) {
 304                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
 305                 DRM_SYSCTL_PRINT(" %d", templists[i]);
 306         }
 307         DRM_SYSCTL_PRINT("\n");
 308
 309         SYSCTL_OUT(req, "", 1);
 310 done:
 311         drm_free(templists, DRM_MEM_DRIVER);
 312         return retcode;
 313 }
 314
 315 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 316 {
 317         struct drm_device *dev = arg1;
 318         struct drm_file *priv, *tempprivs;
 319         char buf[128];
 320         int retcode;
 321         int privcount, i;
 322
 323         DRM_LOCK(dev);
 324
 325         privcount = 0;
 326         TAILQ_FOREACH(priv, &dev->files, link)
 327                 privcount++;
 328
 329         tempprivs = kmalloc(sizeof(struct drm_file) * privcount, DRM_MEM_DRIVER,
 330             M_NOWAIT);
 331         if (tempprivs == NULL) {
 332                 DRM_UNLOCK(dev);
 333                 return ENOMEM;
 334         }
 335         i = 0;
 336         TAILQ_FOREACH(priv, &dev->files, link)
 337                 tempprivs[i++] = *priv;
 338
 339         DRM_UNLOCK(dev);
 340
 341         DRM_SYSCTL_PRINT(
 342             "\na dev            pid   uid      magic     ioctls\n");
 343         for (i = 0; i < privcount; i++) {
 344                 priv = &tempprivs[i];
 345                 DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
 346                                priv->authenticated ? 'y' : 'n',
 347                                devtoname(priv->dev->devnode),
 348                                priv->pid,
 349                                priv->uid,
 350                                priv->magic,
 351                                priv->ioctl_count);
 352         }
 353
 354         SYSCTL_OUT(req, "", 1);
 355 done:
 356         drm_free(tempprivs, DRM_MEM_DRIVER);
 357         return retcode;
 358 }
 359
 360 static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS
 361 {
 362         struct drm_device *dev = arg1;
 363         char buf[128];
 364         int retcode;
 365         int i;
 366
 367         DRM_SYSCTL_PRINT("\ncrtc ref count    last     enabled inmodeset\n");
 368         DRM_LOCK(dev);
 369         if (dev->_vblank_count == NULL)
 370                 goto done;
 371         for (i = 0 ; i < dev->num_crtcs ; i++) {
 372                 DRM_SYSCTL_PRINT("  %02d  %02d %08d %08d %02d      %02d\n",
 373                     i, dev->vblank_refcount[i],
 374                     dev->_vblank_count[i],
 375                     dev->last_vblank[i],
 376                     dev->vblank_enabled[i],
 377                     dev->vblank_inmodeset[i]);
 378         }
 379 done:
 380         DRM_UNLOCK(dev);
 381
 382         SYSCTL_OUT(req, "", -1);
 383         return retcode;
 384 }