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, M_DRM, 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, sizeof(drm_debug),
 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),
 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, M_DRM);
 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 /**
 179  * Called when "/proc/dri/.../vm" is read.
 180  *
 181  * Prints information about all mappings in drm_device::maplist.
 182  */
 183 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
 184 {
 185         char buf[128];
 186         int retcode;
 187         struct drm_device *dev = arg1;
 188         struct drm_local_map *map;
 189         struct drm_map_list *r_list;
 190
 191         /* Hardcoded from _DRM_FRAME_BUFFER,
 192            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 193            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 194         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 195         const char *type;
 196         int i;
 197
 198         DRM_LOCK(dev);
 199         DRM_SYSCTL_PRINT("\nslot offset         size       "
 200             "type flags address            handle mtrr\n");
 201         i = 0;
 202         list_for_each_entry(r_list, &dev->maplist, head) {
 203                 map = r_list->map;
 204                 if (!map)
 205                         continue;
 206                 if (map->type < 0 || map->type > 5)
 207                         type = "??";
 208                 else
 209                         type = types[map->type];
 210
 211                 DRM_SYSCTL_PRINT("%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 212                            i,
 213                            (unsigned long long)map->offset,
 214                            map->size, type, map->flags,
 215                            (unsigned long) r_list->user_token);
 216                 if (map->mtrr < 0)
 217                         DRM_SYSCTL_PRINT("none\n");
 218                 else
 219                         DRM_SYSCTL_PRINT("%4d\n", map->mtrr);
 220                 i++;
 221
 222         }
 223         SYSCTL_OUT(req, "", 1);
 224         DRM_UNLOCK(dev);
 225
 226 done:
 227         return 0;
 228 }
 229
 230 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
 231 {
 232         struct drm_device        *dev = arg1;
 233         drm_device_dma_t *dma = dev->dma;
 234         drm_device_dma_t tempdma;
 235         int *templists;
 236         int i;
 237         char buf[128];
 238         int retcode;
 239
 240         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
 241          * copy of the whole structure and the relevant data from buflist.
 242          */
 243         DRM_LOCK(dev);
 244         if (dma == NULL) {
 245                 DRM_UNLOCK(dev);
 246                 return 0;
 247         }
 248         spin_lock(&dev->dma_lock);
 249         tempdma = *dma;
 250         templists = kmalloc(sizeof(int) * dma->buf_count, M_DRM,
 251             M_NOWAIT);
 252         for (i = 0; i < dma->buf_count; i++)
 253                 templists[i] = dma->buflist[i]->list;
 254         dma = &tempdma;
 255         spin_unlock(&dev->dma_lock);
 256         DRM_UNLOCK(dev);
 257
 258         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
 259         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 260                 if (dma->bufs[i].buf_count)
 261                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
 262                                        i,
 263                                        dma->bufs[i].buf_size,
 264                                        dma->bufs[i].buf_count,
 265                                        atomic_read(&dma->bufs[i]
 266                                                    .freelist.count),
 267                                        dma->bufs[i].seg_count,
 268                                        dma->bufs[i].seg_count
 269                                        *(1 << dma->bufs[i].page_order),
 270                                        (dma->bufs[i].seg_count
 271                                         * (1 << dma->bufs[i].page_order))
 272                                        * (int)PAGE_SIZE / 1024);
 273         }
 274         DRM_SYSCTL_PRINT("\n");
 275         for (i = 0; i < dma->buf_count; i++) {
 276                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
 277                 DRM_SYSCTL_PRINT(" %d", templists[i]);
 278         }
 279         DRM_SYSCTL_PRINT("\n");
 280
 281         SYSCTL_OUT(req, "", 1);
 282 done:
 283         drm_free(templists, M_DRM);
 284         return retcode;
 285 }
 286
 287 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 288 {
 289         struct drm_device *dev = arg1;
 290         struct drm_file *priv, *tempprivs;
 291         char buf[128];
 292         int retcode;
 293         int privcount, i;
 294
 295         DRM_LOCK(dev);
 296
 297         privcount = 0;
 298         list_for_each_entry(priv, &dev->filelist, lhead)
 299                 privcount++;
 300
 301         tempprivs = kmalloc(sizeof(struct drm_file) * privcount, M_DRM,
 302             M_NOWAIT);
 303         if (tempprivs == NULL) {
 304                 DRM_UNLOCK(dev);
 305                 return ENOMEM;
 306         }
 307         i = 0;
 308         list_for_each_entry(priv, &dev->filelist, lhead)
 309                 tempprivs[i++] = *priv;
 310
 311         DRM_UNLOCK(dev);
 312
 313         DRM_SYSCTL_PRINT(
 314             "\na dev            pid   uid      magic     ioctls\n");
 315         for (i = 0; i < privcount; i++) {
 316                 priv = &tempprivs[i];
 317                 DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
 318                                priv->authenticated ? 'y' : 'n',
 319                                devtoname(priv->dev->devnode),
 320                                priv->pid,
 321                                priv->uid,
 322                                priv->magic,
 323                                priv->ioctl_count);
 324         }
 325
 326         SYSCTL_OUT(req, "", 1);
 327 done:
 328         drm_free(tempprivs, M_DRM);
 329         return retcode;
 330 }
 331
 332 static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS
 333 {
 334         struct drm_device *dev = arg1;
 335         char buf[128];
 336         int retcode;
 337         int i;
 338
 339         DRM_SYSCTL_PRINT("\ncrtc ref count    last     enabled inmodeset\n");
 340         DRM_LOCK(dev);
 341         if (dev->_vblank_count == NULL)
 342                 goto done;
 343         for (i = 0 ; i < dev->num_crtcs ; i++) {
 344                 DRM_SYSCTL_PRINT("  %02d  %02d %08d %08d %02d      %02d\n",
 345                     i, dev->vblank_refcount[i].counter,
 346                     dev->_vblank_count[i].counter,
 347                     dev->last_vblank[i],
 348                     dev->vblank_enabled[i],
 349                     dev->vblank_inmodeset[i]);
 350         }
 351 done:
 352         DRM_UNLOCK(dev);
 353
 354         SYSCTL_OUT(req, "", -1);
 355         return retcode;
 356 }