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
  42 struct drm_sysctl_list {
  43         const char *name;
  44         int        (*f) DRM_SYSCTL_HANDLER_ARGS;
  45 } drm_sysctl_list[] = {
  46         {"name",    drm_name_info},
  47         {"vm",      drm_vm_info},
  48         {"clients", drm_clients_info},
  49         {"bufs",    drm_bufs_info},
  50 };
  51 #define DRM_SYSCTL_ENTRIES NELEM(drm_sysctl_list)
  52
  53 int drm_sysctl_init(struct drm_device *dev)
  54 {
  55         struct drm_sysctl_info *info;
  56         struct sysctl_oid *oid;
  57         struct sysctl_oid *top, *drioid;
  58         int               i;
  59
  60         info = kmalloc(sizeof *info, M_DRM, M_WAITOK | M_ZERO);
  61         if ( !info )
  62                 return 1;
  63         dev->sysctl = info;
  64
  65         /* Add the sysctl node for DRI if it doesn't already exist */
  66         drioid = SYSCTL_ADD_NODE(&info->ctx, &sysctl__hw_children, OID_AUTO,
  67             "dri", CTLFLAG_RW, NULL, "DRI Graphics");
  68         if (!drioid)
  69                 return 1;
  70
  71         /* Find the next free slot under hw.dri */
  72         i = 0;
  73         SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
  74                 if (i <= oid->oid_arg2)
  75                         i = oid->oid_arg2 + 1;
  76         }
  77         if (i>9)
  78                 return 1;
  79
  80         dev->sysctl_node_idx = i;
  81         /* Add the hw.dri.x for our device */
  82         info->name[0] = '0' + i;
  83         info->name[1] = 0;
  84         top = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(drioid),
  85             OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
  86         if (!top)
  87                 return 1;
  88
  89         for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
  90                 oid = SYSCTL_ADD_OID(&info->ctx,
  91                         SYSCTL_CHILDREN(top),
  92                         OID_AUTO,
  93                         drm_sysctl_list[i].name,
  94                         CTLTYPE_STRING | CTLFLAG_RD,
  95                         dev,
  96                         0,
  97                         drm_sysctl_list[i].f,
  98                         "A",
  99                         NULL);
 100                 if (!oid)
 101                         return 1;
 102         }
 103         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "debug",
 104             CTLFLAG_RW, &drm_debug, sizeof(drm_debug),
 105             "Enable debugging output");
 106         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "notyet",
 107             CTLFLAG_RW, &drm_notyet_flag, sizeof(drm_debug),
 108             "Enable notyet reminders");
 109
 110         if (dev->driver->sysctl_init != NULL)
 111                 dev->driver->sysctl_init(dev, &info->ctx, top);
 112
 113         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
 114             "vblank_offdelay", CTLFLAG_RW, &drm_vblank_offdelay,
 115             sizeof(drm_vblank_offdelay),
 116             "");
 117         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
 118             "timestamp_precision", CTLFLAG_RW, &drm_timestamp_precision,
 119             sizeof(drm_timestamp_precision),
 120             "");
 121
 122         return (0);
 123 }
 124
 125 int drm_sysctl_cleanup(struct drm_device *dev)
 126 {
 127         int error;
 128
 129         error = sysctl_ctx_free(&dev->sysctl->ctx);
 130         drm_free(dev->sysctl, M_DRM);
 131         dev->sysctl = NULL;
 132         if (dev->driver->sysctl_cleanup != NULL)
 133                 dev->driver->sysctl_cleanup(dev);
 134
 135         return (error);
 136 }
 137
 138 #define DRM_SYSCTL_PRINT(fmt, arg...)                           \
 139 do {                                                            \
 140         ksnprintf(buf, sizeof(buf), fmt, ##arg);                        \
 141         retcode = SYSCTL_OUT(req, buf, strlen(buf));            \
 142         if (retcode)                                            \
 143                 goto done;                                      \
 144 } while (0)
 145
 146 static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
 147 {
 148         struct drm_device *dev = arg1;
 149         char buf[128];
 150         int retcode;
 151         int hasunique = 0;
 152
 153         DRM_SYSCTL_PRINT("%s 0x%x", dev->driver->name, dev2udev(dev->devnode));
 154
 155         DRM_LOCK(dev);
 156         if (dev->unique) {
 157                 ksnprintf(buf, sizeof(buf), " %s", dev->unique);
 158                 hasunique = 1;
 159         }
 160         DRM_UNLOCK(dev);
 161
 162         if (hasunique)
 163                 SYSCTL_OUT(req, buf, strlen(buf));
 164
 165         SYSCTL_OUT(req, "", 1);
 166
 167 done:
 168         return retcode;
 169 }
 170
 171 /**
 172  * Called when "/proc/dri/.../vm" is read.
 173  *
 174  * Prints information about all mappings in drm_device::maplist.
 175  */
 176 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
 177 {
 178         char buf[128];
 179         int retcode;
 180         struct drm_device *dev = arg1;
 181         struct drm_local_map *map;
 182         struct drm_map_list *r_list;
 183
 184         /* Hardcoded from _DRM_FRAME_BUFFER,
 185            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 186            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 187         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 188         const char *type;
 189         int i;
 190
 191         DRM_LOCK(dev);
 192         DRM_SYSCTL_PRINT("\nslot offset         size       "
 193             "type flags address            handle mtrr\n");
 194         i = 0;
 195         list_for_each_entry(r_list, &dev->maplist, head) {
 196                 map = r_list->map;
 197                 if (!map)
 198                         continue;
 199                 if (map->type < 0 || map->type > 5)
 200                         type = "??";
 201                 else
 202                         type = types[map->type];
 203
 204                 DRM_SYSCTL_PRINT("%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 205                            i,
 206                            (unsigned long long)map->offset,
 207                            map->size, type, map->flags,
 208                            (unsigned long) r_list->user_token);
 209                 if (map->mtrr < 0)
 210                         DRM_SYSCTL_PRINT("none\n");
 211                 else
 212                         DRM_SYSCTL_PRINT("%4d\n", map->mtrr);
 213                 i++;
 214
 215         }
 216         SYSCTL_OUT(req, "", 1);
 217         DRM_UNLOCK(dev);
 218
 219 done:
 220         return 0;
 221 }
 222
 223 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
 224 {
 225         struct drm_device        *dev = arg1;
 226         drm_device_dma_t *dma = dev->dma;
 227         drm_device_dma_t tempdma;
 228         int *templists;
 229         int i;
 230         char buf[128];
 231         int retcode;
 232
 233         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
 234          * copy of the whole structure and the relevant data from buflist.
 235          */
 236         DRM_LOCK(dev);
 237         if (dma == NULL) {
 238                 DRM_UNLOCK(dev);
 239                 return 0;
 240         }
 241         spin_lock(&dev->dma_lock);
 242         tempdma = *dma;
 243         templists = kmalloc(sizeof(int) * dma->buf_count, M_DRM,
 244                             M_WAITOK | M_NULLOK);
 245         for (i = 0; i < dma->buf_count; i++)
 246                 templists[i] = dma->buflist[i]->list;
 247         dma = &tempdma;
 248         spin_unlock(&dev->dma_lock);
 249         DRM_UNLOCK(dev);
 250
 251         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
 252         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 253                 if (dma->bufs[i].buf_count)
 254                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
 255                                        i,
 256                                        dma->bufs[i].buf_size,
 257                                        dma->bufs[i].buf_count,
 258                                        atomic_read(&dma->bufs[i]
 259                                                    .freelist.count),
 260                                        dma->bufs[i].seg_count,
 261                                        dma->bufs[i].seg_count
 262                                        *(1 << dma->bufs[i].page_order),
 263                                        (dma->bufs[i].seg_count
 264                                         * (1 << dma->bufs[i].page_order))
 265                                        * (int)PAGE_SIZE / 1024);
 266         }
 267         DRM_SYSCTL_PRINT("\n");
 268         for (i = 0; i < dma->buf_count; i++) {
 269                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
 270                 DRM_SYSCTL_PRINT(" %d", templists[i]);
 271         }
 272         DRM_SYSCTL_PRINT("\n");
 273
 274         SYSCTL_OUT(req, "", 1);
 275 done:
 276         drm_free(templists, M_DRM);
 277         return retcode;
 278 }
 279
 280 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 281 {
 282         struct drm_device *dev = arg1;
 283         struct drm_file *priv, *tempprivs;
 284         char buf[128];
 285         int retcode;
 286         int privcount, i;
 287
 288         DRM_LOCK(dev);
 289
 290         privcount = 0;
 291         list_for_each_entry(priv, &dev->filelist, lhead)
 292                 privcount++;
 293
 294         tempprivs = kmalloc(sizeof(struct drm_file) * privcount, M_DRM,
 295                             M_WAITOK | M_NULLOK);
 296         if (tempprivs == NULL) {
 297                 DRM_UNLOCK(dev);
 298                 return ENOMEM;
 299         }
 300         i = 0;
 301         list_for_each_entry(priv, &dev->filelist, lhead)
 302                 tempprivs[i++] = *priv;
 303
 304         DRM_UNLOCK(dev);
 305
 306         DRM_SYSCTL_PRINT(
 307             "\na dev            pid   uid      magic     ioctls\n");
 308         for (i = 0; i < privcount; i++) {
 309                 priv = &tempprivs[i];
 310                 DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
 311                                priv->authenticated ? 'y' : 'n',
 312                                devtoname(priv->dev->devnode),
 313                                priv->pid,
 314                                priv->uid,
 315                                priv->magic,
 316                                priv->ioctl_count);
 317         }
 318
 319         SYSCTL_OUT(req, "", 1);
 320 done:
 321         drm_free(tempprivs, M_DRM);
 322         return retcode;
 323 }