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  * $DragonFly: src/sys/dev/drm/drm_sysctl.c,v 1.1 2008/04/05 18:12:29 hasso 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 "drmP.h"
  32 #include "drm.h"
  33
  34 #include <sys/sysctl.h>
  35
  36 static int         drm_name_info DRM_SYSCTL_HANDLER_ARGS;
  37 static int         drm_vm_info DRM_SYSCTL_HANDLER_ARGS;
  38 static int         drm_clients_info DRM_SYSCTL_HANDLER_ARGS;
  39 static int         drm_bufs_info DRM_SYSCTL_HANDLER_ARGS;
  40
  41 struct drm_sysctl_list {
  42         const char *name;
  43         int        (*f) DRM_SYSCTL_HANDLER_ARGS;
  44 } drm_sysctl_list[] = {
  45         {"name",    drm_name_info},
  46         {"vm",      drm_vm_info},
  47         {"clients", drm_clients_info},
  48         {"bufs",    drm_bufs_info},
  49 };
  50 #define DRM_SYSCTL_ENTRIES (sizeof(drm_sysctl_list)/sizeof(drm_sysctl_list[0]))
  51
  52 struct drm_sysctl_info {
  53         struct sysctl_ctx_list ctx;
  54         char                   name[2];
  55 };
  56
  57 int drm_sysctl_init(drm_device_t *dev)
  58 {
  59         struct drm_sysctl_info *info;
  60         struct sysctl_oid *oid;
  61         struct sysctl_oid *top, *drioid;
  62         int               i;
  63
  64         info = malloc(sizeof *info, M_DRM, M_WAITOK | M_ZERO);
  65         if ( !info )
  66                 return 1;
  67         dev->sysctl = info;
  68
  69         /* Add the sysctl node for DRI if it doesn't already exist */
  70         drioid = SYSCTL_ADD_NODE( &info->ctx, &sysctl__hw_children, OID_AUTO, "dri", CTLFLAG_RW, NULL, "DRI Graphics");
  71         if (!drioid)
  72                 return 1;
  73
  74         /* Find the next free slot under hw.dri */
  75         i = 0;
  76         SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
  77                 if (i <= oid->oid_arg2)
  78                         i = oid->oid_arg2 + 1;
  79         }
  80         if (i>9)
  81                 return 1;
  82
  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), OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
  87         if (!top)
  88                 return 1;
  89
  90         for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
  91                 oid = SYSCTL_ADD_OID(&info->ctx,
  92                         SYSCTL_CHILDREN(top),
  93                         OID_AUTO,
  94                         drm_sysctl_list[i].name,
  95                         CTLTYPE_INT | CTLFLAG_RD,
  96                         dev,
  97                         0,
  98                         drm_sysctl_list[i].f,
  99                         "A",
 100                         NULL);
 101                 if (!oid)
 102                         return 1;
 103         }
 104         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(top), OID_AUTO, "debug",
 105             CTLFLAG_RW, &drm_debug_flag, sizeof(drm_debug_flag),
 106             "Enable debugging output");
 107
 108         return 0;
 109 }
 110
 111 int drm_sysctl_cleanup(drm_device_t *dev)
 112 {
 113         int error;
 114         error = sysctl_ctx_free( &dev->sysctl->ctx );
 115
 116         free(dev->sysctl, M_DRM);
 117         dev->sysctl = NULL;
 118
 119         return error;
 120 }
 121
 122 #define DRM_SYSCTL_PRINT(fmt, arg...)                           \
 123 do {                                                            \
 124         snprintf(buf, sizeof(buf), fmt, ##arg);                 \
 125         retcode = SYSCTL_OUT(req, buf, strlen(buf));            \
 126         if (retcode)                                            \
 127                 goto done;                                      \
 128 } while (0)
 129
 130 static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
 131 {
 132         drm_device_t *dev = arg1;
 133         char buf[128];
 134         int retcode;
 135         int hasunique = 0;
 136
 137         DRM_SYSCTL_PRINT("%s 0x%x", dev->driver.name, dev2udev(dev->devnode));
 138
 139         DRM_LOCK();
 140         if (dev->unique) {
 141                 snprintf(buf, sizeof(buf), " %s", dev->unique);
 142                 hasunique = 1;
 143         }
 144         DRM_UNLOCK();
 145
 146         if (hasunique)
 147                 SYSCTL_OUT(req, buf, strlen(buf));
 148
 149         SYSCTL_OUT(req, "", 1);
 150
 151 done:
 152         return retcode;
 153 }
 154
 155 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
 156 {
 157         drm_device_t *dev = arg1;
 158         drm_local_map_t *map, *tempmaps;
 159         const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG" };
 160         const char *type, *yesno;
 161         int i, mapcount;
 162         char buf[128];
 163         int retcode;
 164
 165         /* We can't hold the lock while doing SYSCTL_OUTs, so allocate a
 166          * temporary copy of all the map entries and then SYSCTL_OUT that.
 167          */
 168         DRM_LOCK();
 169
 170         mapcount = 0;
 171         TAILQ_FOREACH(map, &dev->maplist, link)
 172                 mapcount++;
 173
 174         tempmaps = malloc(sizeof(drm_local_map_t) * mapcount, M_DRM, M_NOWAIT);
 175         if (tempmaps == NULL) {
 176                 DRM_UNLOCK();
 177                 return ENOMEM;
 178         }
 179
 180         i = 0;
 181         TAILQ_FOREACH(map, &dev->maplist, link)
 182                 tempmaps[i++] = *map;
 183
 184         DRM_UNLOCK();
 185
 186         DRM_SYSCTL_PRINT("\nslot         offset       size type flags    "
 187                          "address mtrr\n");
 188
 189         for (i = 0; i < mapcount; i++) {
 190                 map = &tempmaps[i];
 191
 192                 if (map->type < 0 || map->type > 4)
 193                         type = "??";
 194                 else
 195                         type = types[map->type];
 196
 197                 if (!map->mtrr)
 198                         yesno = "no";
 199                 else
 200                         yesno = "yes";
 201
 202                 DRM_SYSCTL_PRINT(
 203                     "%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx %s\n", i,
 204                     map->offset, map->size, type, map->flags,
 205                     (unsigned long)map->handle, yesno);
 206         }
 207         SYSCTL_OUT(req, "", 1);
 208
 209 done:
 210         free(tempmaps, M_DRM);
 211         return retcode;
 212 }
 213
 214 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
 215 {
 216         drm_device_t     *dev = arg1;
 217         drm_device_dma_t *dma = dev->dma;
 218         drm_device_dma_t tempdma;
 219         int *templists;
 220         int i;
 221         char buf[128];
 222         int retcode;
 223
 224         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
 225          * copy of the whole structure and the relevant data from buflist.
 226          */
 227         DRM_LOCK();
 228         if (dma == NULL) {
 229                 DRM_UNLOCK();
 230                 return 0;
 231         }
 232         DRM_SPINLOCK(&dev->dma_lock);
 233         tempdma = *dma;
 234         templists = malloc(sizeof(int) * dma->buf_count, M_DRM, M_NOWAIT);
 235         for (i = 0; i < dma->buf_count; i++)
 236                 templists[i] = dma->buflist[i]->list;
 237         dma = &tempdma;
 238         DRM_SPINUNLOCK(&dev->dma_lock);
 239         DRM_UNLOCK();
 240
 241         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
 242         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 243                 if (dma->bufs[i].buf_count)
 244                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
 245                                        i,
 246                                        dma->bufs[i].buf_size,
 247                                        dma->bufs[i].buf_count,
 248                                        atomic_read(&dma->bufs[i]
 249                                                    .freelist.count),
 250                                        dma->bufs[i].seg_count,
 251                                        dma->bufs[i].seg_count
 252                                        *(1 << dma->bufs[i].page_order),
 253                                        (dma->bufs[i].seg_count
 254                                         * (1 << dma->bufs[i].page_order))
 255                                        * PAGE_SIZE / 1024);
 256         }
 257         DRM_SYSCTL_PRINT("\n");
 258         for (i = 0; i < dma->buf_count; i++) {
 259                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
 260                 DRM_SYSCTL_PRINT(" %d", templists[i]);
 261         }
 262         DRM_SYSCTL_PRINT("\n");
 263
 264         SYSCTL_OUT(req, "", 1);
 265 done:
 266         free(templists, M_DRM);
 267         return retcode;
 268 }
 269
 270 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 271 {
 272         drm_device_t *dev = arg1;
 273         drm_file_t *priv, *tempprivs;
 274         char buf[128];
 275         int retcode;
 276         int privcount, i;
 277
 278         DRM_LOCK();
 279
 280         privcount = 0;
 281         TAILQ_FOREACH(priv, &dev->files, link)
 282                 privcount++;
 283
 284         tempprivs = malloc(sizeof(drm_file_t) * privcount, M_DRM, M_NOWAIT);
 285         if (tempprivs == NULL) {
 286                 DRM_UNLOCK();
 287                 return ENOMEM;
 288         }
 289         i = 0;
 290         TAILQ_FOREACH(priv, &dev->files, link)
 291                 tempprivs[i++] = *priv;
 292
 293         DRM_UNLOCK();
 294
 295         DRM_SYSCTL_PRINT("\na dev       pid    uid      magic     ioctls\n");
 296         for (i = 0; i < privcount; i++) {
 297                 priv = &tempprivs[i];
 298                 DRM_SYSCTL_PRINT("%c %3d %5d %5d %10u %10lu\n",
 299                                priv->authenticated ? 'y' : 'n',
 300                                priv->minor,
 301                                priv->pid,
 302                                priv->uid,
 303                                priv->magic,
 304                                priv->ioctl_count);
 305         }
 306
 307         SYSCTL_OUT(req, "", 1);
 308 done:
 309         free(tempprivs, M_DRM);
 310         return retcode;
 311 }