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 int drm_sysctl_init(struct drm_device *dev)
  56 {
  57         struct drm_sysctl_info *info;
  58         struct sysctl_oid *oid;
  59         struct sysctl_oid *top, *drioid;
  60         int               i;
  61
  62         info = kmalloc(sizeof *info, M_DRM, M_WAITOK | M_ZERO);
  63         if ( !info )
  64                 return 1;
  65         dev->sysctl = info;
  66
  67         /* Add the sysctl node for DRI if it doesn't already exist */
  68         drioid = SYSCTL_ADD_NODE(&info->ctx, &sysctl__hw_children, OID_AUTO,
  69             "dri", CTLFLAG_RW, NULL, "DRI Graphics");
  70         if (!drioid)
  71                 return 1;
  72
  73         /* Find the next free slot under hw.dri */
  74         i = 0;
  75         SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
  76                 if (i <= oid->oid_arg2)
  77                         i = oid->oid_arg2 + 1;
  78         }
  79         if (i>9)
  80                 return 1;
  81
  82         dev->sysctl_node_idx = i;
  83         /* Add the hw.dri.x for our device */
  84         info->name[0] = '0' + i;
  85         info->name[1] = 0;
  86         top = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(drioid),
  87             OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
  88         if (!top)
  89                 return 1;
  90
  91         for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
  92                 oid = SYSCTL_ADD_OID(&info->ctx,
  93                         SYSCTL_CHILDREN(top),
  94                         OID_AUTO,
  95                         drm_sysctl_list[i].name,
  96                         CTLTYPE_STRING | CTLFLAG_RD,
  97                         dev,
  98                         0,
  99                         drm_sysctl_list[i].f,
 100                         "A",
 101                         NULL);
 102                 if (!oid)
 103                         return 1;
 104         }
 105         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "debug",
 106             CTLFLAG_RW, &drm_debug, sizeof(drm_debug),
 107             "Enable debugging output");
 108         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "notyet",
 109             CTLFLAG_RW, &drm_notyet_flag, sizeof(drm_debug),
 110             "Enable notyet reminders");
 111
 112         if (dev->driver->sysctl_init != NULL)
 113                 dev->driver->sysctl_init(dev, &info->ctx, top);
 114
 115         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
 116             "vblank_offdelay", CTLFLAG_RW, &drm_vblank_offdelay,
 117             sizeof(drm_vblank_offdelay),
 118             "");
 119         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
 120             "timestamp_precision", CTLFLAG_RW, &drm_timestamp_precision,
 121             sizeof(drm_timestamp_precision),
 122             "");
 123
 124         return (0);
 125 }
 126
 127 int drm_sysctl_cleanup(struct drm_device *dev)
 128 {
 129         int error;
 130
 131         error = sysctl_ctx_free(&dev->sysctl->ctx);
 132         drm_free(dev->sysctl, M_DRM);
 133         dev->sysctl = NULL;
 134         if (dev->driver->sysctl_cleanup != NULL)
 135                 dev->driver->sysctl_cleanup(dev);
 136
 137         return (error);
 138 }
 139
 140 #define DRM_SYSCTL_PRINT(fmt, arg...)                           \
 141 do {                                                            \
 142         ksnprintf(buf, sizeof(buf), fmt, ##arg);                        \
 143         retcode = SYSCTL_OUT(req, buf, strlen(buf));            \
 144         if (retcode)                                            \
 145                 goto done;                                      \
 146 } while (0)
 147
 148 static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
 149 {
 150         struct drm_device *dev = arg1;
 151         char buf[128];
 152         int retcode;
 153         int hasunique = 0;
 154
 155         DRM_SYSCTL_PRINT("%s 0x%x", dev->driver->name, dev2udev(dev->devnode));
 156
 157         DRM_LOCK(dev);
 158         if (dev->unique) {
 159                 ksnprintf(buf, sizeof(buf), " %s", dev->unique);
 160                 hasunique = 1;
 161         }
 162         DRM_UNLOCK(dev);
 163
 164         if (hasunique)
 165                 SYSCTL_OUT(req, buf, strlen(buf));
 166
 167         SYSCTL_OUT(req, "", 1);
 168
 169 done:
 170         return retcode;
 171 }
 172
 173 /**
 174  * Called when "/proc/dri/.../vm" is read.
 175  *
 176  * Prints information about all mappings in drm_device::maplist.
 177  */
 178 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
 179 {
 180         char buf[128];
 181         int retcode;
 182         struct drm_device *dev = arg1;
 183         struct drm_local_map *map;
 184         struct drm_map_list *r_list;
 185
 186         /* Hardcoded from _DRM_FRAME_BUFFER,
 187            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 188            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 189         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 190         const char *type;
 191         int i;
 192
 193         DRM_LOCK(dev);
 194         DRM_SYSCTL_PRINT("\nslot offset         size       "
 195             "type flags address            handle mtrr\n");
 196         i = 0;
 197         list_for_each_entry(r_list, &dev->maplist, head) {
 198                 map = r_list->map;
 199                 if (!map)
 200                         continue;
 201                 if (map->type < 0 || map->type > 5)
 202                         type = "??";
 203                 else
 204                         type = types[map->type];
 205
 206                 DRM_SYSCTL_PRINT("%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 207                            i,
 208                            (unsigned long long)map->offset,
 209                            map->size, type, map->flags,
 210                            (unsigned long) r_list->user_token);
 211                 if (map->mtrr < 0)
 212                         DRM_SYSCTL_PRINT("none\n");
 213                 else
 214                         DRM_SYSCTL_PRINT("%4d\n", map->mtrr);
 215                 i++;
 216
 217         }
 218         SYSCTL_OUT(req, "", 1);
 219         DRM_UNLOCK(dev);
 220
 221 done:
 222         return 0;
 223 }
 224
 225 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
 226 {
 227         struct drm_device        *dev = arg1;
 228         drm_device_dma_t *dma = dev->dma;
 229         drm_device_dma_t tempdma;
 230         int *templists;
 231         int i;
 232         char buf[128];
 233         int retcode;
 234
 235         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
 236          * copy of the whole structure and the relevant data from buflist.
 237          */
 238         DRM_LOCK(dev);
 239         if (dma == NULL) {
 240                 DRM_UNLOCK(dev);
 241                 return 0;
 242         }
 243         spin_lock(&dev->dma_lock);
 244         tempdma = *dma;
 245         templists = kmalloc(sizeof(int) * dma->buf_count, M_DRM,
 246                             M_WAITOK | M_NULLOK);
 247         for (i = 0; i < dma->buf_count; i++)
 248                 templists[i] = dma->buflist[i]->list;
 249         dma = &tempdma;
 250         spin_unlock(&dev->dma_lock);
 251         DRM_UNLOCK(dev);
 252
 253         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
 254         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 255                 if (dma->bufs[i].buf_count)
 256                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
 257                                        i,
 258                                        dma->bufs[i].buf_size,
 259                                        dma->bufs[i].buf_count,
 260                                        atomic_read(&dma->bufs[i]
 261                                                    .freelist.count),
 262                                        dma->bufs[i].seg_count,
 263                                        dma->bufs[i].seg_count
 264                                        *(1 << dma->bufs[i].page_order),
 265                                        (dma->bufs[i].seg_count
 266                                         * (1 << dma->bufs[i].page_order))
 267                                        * (int)PAGE_SIZE / 1024);
 268         }
 269         DRM_SYSCTL_PRINT("\n");
 270         for (i = 0; i < dma->buf_count; i++) {
 271                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
 272                 DRM_SYSCTL_PRINT(" %d", templists[i]);
 273         }
 274         DRM_SYSCTL_PRINT("\n");
 275
 276         SYSCTL_OUT(req, "", 1);
 277 done:
 278         drm_free(templists, M_DRM);
 279         return retcode;
 280 }
 281
 282 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 283 {
 284         struct drm_device *dev = arg1;
 285         struct drm_file *priv, *tempprivs;
 286         char buf[128];
 287         int retcode;
 288         int privcount, i;
 289
 290         DRM_LOCK(dev);
 291
 292         privcount = 0;
 293         list_for_each_entry(priv, &dev->filelist, lhead)
 294                 privcount++;
 295
 296         tempprivs = kmalloc(sizeof(struct drm_file) * privcount, M_DRM,
 297                             M_WAITOK | M_NULLOK);
 298         if (tempprivs == NULL) {
 299                 DRM_UNLOCK(dev);
 300                 return ENOMEM;
 301         }
 302         i = 0;
 303         list_for_each_entry(priv, &dev->filelist, lhead)
 304                 tempprivs[i++] = *priv;
 305
 306         DRM_UNLOCK(dev);
 307
 308         DRM_SYSCTL_PRINT(
 309             "\na dev            pid   uid      magic     ioctls\n");
 310         for (i = 0; i < privcount; i++) {
 311                 priv = &tempprivs[i];
 312                 DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
 313                                priv->authenticated ? 'y' : 'n',
 314                                devtoname(priv->dev->devnode),
 315                                priv->pid,
 316                                priv->uid,
 317                                priv->magic,
 318                                priv->ioctl_count);
 319         }
 320
 321         SYSCTL_OUT(req, "", 1);
 322 done:
 323         drm_free(tempprivs, M_DRM);
 324         return retcode;
 325 }
 326
 327 static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS
 328 {
 329         struct drm_device *dev = arg1;
 330         char buf[128];
 331         int retcode;
 332         int i;
 333
 334         DRM_SYSCTL_PRINT("\ncrtc ref count    last     enabled inmodeset\n");
 335         DRM_LOCK(dev);
 336         if (dev->_vblank_count == NULL)
 337                 goto done;
 338         for (i = 0 ; i < dev->num_crtcs ; i++) {
 339                 DRM_SYSCTL_PRINT("  %02d  %02d %08d %08d %02d      %02d\n",
 340                     i, dev->vblank_refcount[i].counter,
 341                     dev->_vblank_count[i].counter,
 342                     dev->last_vblank[i],
 343                     dev->vblank_enabled[i],
 344                     dev->vblank_inmodeset[i]);
 345         }
 346 done:
 347         DRM_UNLOCK(dev);
 348
 349         SYSCTL_OUT(req, "", -1);
 350         return retcode;
 351 }