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
  24 #include <sys/cdefs.h>
  25 __FBSDID("$FreeBSD$");
  26
  27 /** @file drm_sysctl.c
  28  * Implementation of various sysctls for controlling DRM behavior and reporting
  29  * debug information.
  30  */
  31
  32 #include "dev/drm/drmP.h"
  33 #include "dev/drm/drm.h"
  34
  35 #include <sys/sysctl.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 (sizeof(drm_sysctl_list)/sizeof(drm_sysctl_list[0]))
  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 = malloc(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, "dri", CTLFLAG_RW, NULL, "DRI Graphics");
  74         if (!drioid)
  75                 return 1;
  76
  77         /* Find the next free slot under hw.dri */
  78         i = 0;
  79         SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
  80                 if (i <= oid->oid_arg2)
  81                         i = oid->oid_arg2 + 1;
  82         }
  83         if (i>9)
  84                 return 1;
  85
  86         /* Add the hw.dri.x for our device */
  87         info->name[0] = '0' + i;
  88         info->name[1] = 0;
  89         top = SYSCTL_ADD_NODE( &info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
  90         if (!top)
  91                 return 1;
  92
  93         for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
  94                 oid = SYSCTL_ADD_OID(&info->ctx,
  95                         SYSCTL_CHILDREN(top),
  96                         OID_AUTO,
  97                         drm_sysctl_list[i].name,
  98                         CTLTYPE_STRING | CTLFLAG_RD,
  99                         dev,
 100                         0,
 101                         drm_sysctl_list[i].f,
 102                         "A",
 103                         NULL);
 104                 if (!oid)
 105                         return 1;
 106         }
 107         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(top), OID_AUTO, "debug",
 108             CTLFLAG_RW, &drm_debug_flag, sizeof(drm_debug_flag),
 109             "Enable debugging output");
 110
 111         return 0;
 112 }
 113
 114 int drm_sysctl_cleanup(struct drm_device *dev)
 115 {
 116         int error;
 117         error = sysctl_ctx_free( &dev->sysctl->ctx );
 118
 119         free(dev->sysctl, DRM_MEM_DRIVER);
 120         dev->sysctl = NULL;
 121
 122         return error;
 123 }
 124
 125 #define DRM_SYSCTL_PRINT(fmt, arg...)                           \
 126 do {                                                            \
 127         snprintf(buf, sizeof(buf), fmt, ##arg);                 \
 128         retcode = SYSCTL_OUT(req, buf, strlen(buf));            \
 129         if (retcode)                                            \
 130                 goto done;                                      \
 131 } while (0)
 132
 133 static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
 134 {
 135         struct drm_device *dev = arg1;
 136         char buf[128];
 137         int retcode;
 138         int hasunique = 0;
 139
 140         DRM_SYSCTL_PRINT("%s 0x%x", dev->driver->name, dev2udev(dev->devnode));
 141
 142         DRM_LOCK();
 143         if (dev->unique) {
 144                 snprintf(buf, sizeof(buf), " %s", dev->unique);
 145                 hasunique = 1;
 146         }
 147         DRM_UNLOCK();
 148
 149         if (hasunique)
 150                 SYSCTL_OUT(req, buf, strlen(buf));
 151
 152         SYSCTL_OUT(req, "", 1);
 153
 154 done:
 155         return retcode;
 156 }
 157
 158 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
 159 {
 160         struct drm_device *dev = arg1;
 161         drm_local_map_t *map, *tempmaps;
 162         const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG" };
 163         const char *type, *yesno;
 164         int i, mapcount;
 165         char buf[128];
 166         int retcode;
 167
 168         /* We can't hold the lock while doing SYSCTL_OUTs, so allocate a
 169          * temporary copy of all the map entries and then SYSCTL_OUT that.
 170          */
 171         DRM_LOCK();
 172
 173         mapcount = 0;
 174         TAILQ_FOREACH(map, &dev->maplist, link)
 175                 mapcount++;
 176
 177         tempmaps = malloc(sizeof(drm_local_map_t) * mapcount, DRM_MEM_DRIVER,
 178             M_NOWAIT);
 179         if (tempmaps == NULL) {
 180                 DRM_UNLOCK();
 181                 return ENOMEM;
 182         }
 183
 184         i = 0;
 185         TAILQ_FOREACH(map, &dev->maplist, link)
 186                 tempmaps[i++] = *map;
 187
 188         DRM_UNLOCK();
 189
 190         DRM_SYSCTL_PRINT("\nslot offset         size       "
 191             "type flags address            handle mtrr\n");
 192
 193         for (i = 0; i < mapcount; i++) {
 194                 map = &tempmaps[i];
 195
 196                 if (map->type < 0 || map->type > 4)
 197                         type = "??";
 198                 else
 199                         type = types[map->type];
 200
 201                 if (!map->mtrr)
 202                         yesno = "no";
 203                 else
 204                         yesno = "yes";
 205
 206                 DRM_SYSCTL_PRINT(
 207                     "%4d 0x%016lx 0x%08lx %4.4s  0x%02x 0x%016lx %6d %s\n",
 208                     i, map->offset, map->size, type, map->flags,
 209                     (unsigned long)map->virtual,
 210                     (unsigned int)((unsigned long)map->handle >>
 211                     DRM_MAP_HANDLE_SHIFT), yesno);
 212         }
 213         SYSCTL_OUT(req, "", 1);
 214
 215 done:
 216         free(tempmaps, DRM_MEM_DRIVER);
 217         return retcode;
 218 }
 219
 220 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
 221 {
 222         struct drm_device        *dev = arg1;
 223         drm_device_dma_t *dma = dev->dma;
 224         drm_device_dma_t tempdma;
 225         int *templists;
 226         int i;
 227         char buf[128];
 228         int retcode;
 229
 230         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
 231          * copy of the whole structure and the relevant data from buflist.
 232          */
 233         DRM_LOCK();
 234         if (dma == NULL) {
 235                 DRM_UNLOCK();
 236                 return 0;
 237         }
 238         DRM_SPINLOCK(&dev->dma_lock);
 239         tempdma = *dma;
 240         templists = malloc(sizeof(int) * dma->buf_count, DRM_MEM_DRIVER,
 241             M_NOWAIT);
 242         for (i = 0; i < dma->buf_count; i++)
 243                 templists[i] = dma->buflist[i]->list;
 244         dma = &tempdma;
 245         DRM_SPINUNLOCK(&dev->dma_lock);
 246         DRM_UNLOCK();
 247
 248         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
 249         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 250                 if (dma->bufs[i].buf_count)
 251                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
 252                                        i,
 253                                        dma->bufs[i].buf_size,
 254                                        dma->bufs[i].buf_count,
 255                                        atomic_read(&dma->bufs[i]
 256                                                    .freelist.count),
 257                                        dma->bufs[i].seg_count,
 258                                        dma->bufs[i].seg_count
 259                                        *(1 << dma->bufs[i].page_order),
 260                                        (dma->bufs[i].seg_count
 261                                         * (1 << dma->bufs[i].page_order))
 262                                        * (int)PAGE_SIZE / 1024);
 263         }
 264         DRM_SYSCTL_PRINT("\n");
 265         for (i = 0; i < dma->buf_count; i++) {
 266                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
 267                 DRM_SYSCTL_PRINT(" %d", templists[i]);
 268         }
 269         DRM_SYSCTL_PRINT("\n");
 270
 271         SYSCTL_OUT(req, "", 1);
 272 done:
 273         free(templists, DRM_MEM_DRIVER);
 274         return retcode;
 275 }
 276
 277 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 278 {
 279         struct drm_device *dev = arg1;
 280         struct drm_file *priv, *tempprivs;
 281         char buf[128];
 282         int retcode;
 283         int privcount, i;
 284
 285         DRM_LOCK();
 286
 287         privcount = 0;
 288         TAILQ_FOREACH(priv, &dev->files, link)
 289                 privcount++;
 290
 291         tempprivs = malloc(sizeof(struct drm_file) * privcount, DRM_MEM_DRIVER,
 292             M_NOWAIT);
 293         if (tempprivs == NULL) {
 294                 DRM_UNLOCK();
 295                 return ENOMEM;
 296         }
 297         i = 0;
 298         TAILQ_FOREACH(priv, &dev->files, link)
 299                 tempprivs[i++] = *priv;
 300
 301         DRM_UNLOCK();
 302
 303         DRM_SYSCTL_PRINT(
 304             "\na dev            pid   uid      magic     ioctls\n");
 305         for (i = 0; i < privcount; i++) {
 306                 priv = &tempprivs[i];
 307                 DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
 308                                priv->authenticated ? 'y' : 'n',
 309                                devtoname(priv->dev->devnode),
 310                                priv->pid,
 311                                priv->uid,
 312                                priv->magic,
 313                                priv->ioctl_count);
 314         }
 315
 316         SYSCTL_OUT(req, "", 1);
 317 done:
 318         free(tempprivs, DRM_MEM_DRIVER);
 319         return retcode;
 320 }
 321
 322 static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS
 323 {
 324         struct drm_device *dev = arg1;
 325         char buf[128];
 326         int retcode;
 327         int i;
 328
 329         DRM_SYSCTL_PRINT("\ncrtc ref count    last     enabled inmodeset\n");
 330         for(i = 0 ; i < dev->num_crtcs ; i++) {
 331                 DRM_SYSCTL_PRINT("  %02d  %02d %08d %08d %02d      %02d\n",
 332                     i, atomic_load_acq_32(&dev->vblank[i].refcount),
 333                     atomic_load_acq_32(&dev->vblank[i].count),
 334                     atomic_load_acq_32(&dev->vblank[i].last),
 335                     atomic_load_acq_int(&dev->vblank[i].enabled),
 336                     atomic_load_acq_int(&dev->vblank[i].inmodeset));
 337         }
 338
 339         SYSCTL_OUT(req, "", -1);
 340 done:
 341         return retcode;
 342 }