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 #include "drm_legacy.h"
  37
  38 SYSCTL_NODE(_hw, OID_AUTO, dri, CTLFLAG_RD, 0, "DRI Graphics");
  39 SYSCTL_INT(_hw_dri, OID_AUTO, debug, CTLFLAG_RW, &drm_debug, 0,
  40             "Enable debugging output");
  41 SYSCTL_INT(_hw_dri, OID_AUTO, vblank_offdelay, CTLFLAG_RW,
  42             &drm_vblank_offdelay, 0, "Delay until vblank irq auto-disable");
  43 SYSCTL_INT(_hw_dri, OID_AUTO, timestamp_precision, CTLFLAG_RW,
  44             &drm_timestamp_precision, 0, "Max. error on timestamps");
  45
  46 static int         drm_name_info DRM_SYSCTL_HANDLER_ARGS;
  47 static int         drm_vm_info DRM_SYSCTL_HANDLER_ARGS;
  48 static int         drm_clients_info DRM_SYSCTL_HANDLER_ARGS;
  49 static int         drm_bufs_info DRM_SYSCTL_HANDLER_ARGS;
  50
  51 struct drm_sysctl_list {
  52         const char *name;
  53         int        (*f) DRM_SYSCTL_HANDLER_ARGS;
  54 } drm_sysctl_list[] = {
  55         {"name",    drm_name_info},
  56         {"vm",      drm_vm_info},
  57         {"clients", drm_clients_info},
  58         {"bufs",    drm_bufs_info},
  59 };
  60 #define DRM_SYSCTL_ENTRIES NELEM(drm_sysctl_list)
  61
  62 int drm_sysctl_init(struct drm_device *dev)
  63 {
  64         struct drm_sysctl_info *info;
  65         struct sysctl_oid *oid;
  66         struct sysctl_oid *top;
  67         int i, unit;
  68
  69         info = kzalloc(sizeof *info, GFP_KERNEL);
  70         if ( !info )
  71                 return 1;
  72         dev->sysctl = info;
  73
  74         unit = device_get_unit(dev->dev->bsddev);
  75         if (unit > 9)
  76                 return 1;
  77
  78         /* Add the hw.dri.x for our device */
  79         info->name[0] = '0' + unit;
  80         info->name[1] = 0;
  81         top = SYSCTL_ADD_NODE(&info->ctx, &SYSCTL_NODE_CHILDREN(_hw, dri),
  82             OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
  83         if (!top)
  84                 return 1;
  85
  86         for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
  87                 oid = SYSCTL_ADD_OID(&info->ctx,
  88                         SYSCTL_CHILDREN(top),
  89                         OID_AUTO,
  90                         drm_sysctl_list[i].name,
  91                         CTLTYPE_STRING | CTLFLAG_RD,
  92                         dev,
  93                         0,
  94                         drm_sysctl_list[i].f,
  95                         "A",
  96                         NULL);
  97                 if (!oid)
  98                         return 1;
  99         }
 100         if (dev->driver->sysctl_init != NULL)
 101                 dev->driver->sysctl_init(dev, &info->ctx, top);
 102
 103         return (0);
 104 }
 105
 106 int drm_sysctl_cleanup(struct drm_device *dev)
 107 {
 108         int error;
 109
 110         error = sysctl_ctx_free(&dev->sysctl->ctx);
 111         kfree(dev->sysctl);
 112         dev->sysctl = NULL;
 113         if (dev->driver->sysctl_cleanup != NULL)
 114                 dev->driver->sysctl_cleanup(dev);
 115
 116         return (error);
 117 }
 118
 119 #define DRM_SYSCTL_PRINT(fmt, arg...)                           \
 120 do {                                                            \
 121         ksnprintf(buf, sizeof(buf), fmt, ##arg);                        \
 122         retcode = SYSCTL_OUT(req, buf, strlen(buf));            \
 123         if (retcode)                                            \
 124                 goto done;                                      \
 125 } while (0)
 126
 127 static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
 128 {
 129         struct drm_device *dev = arg1;
 130         char buf[128];
 131         int retcode;
 132         int hasunique = 0;
 133
 134         DRM_SYSCTL_PRINT("%s 0x%x", dev->driver->name, dev2udev(dev->devnode));
 135
 136         DRM_LOCK(dev);
 137         if (dev->unique) {
 138                 ksnprintf(buf, sizeof(buf), " %s", dev->unique);
 139                 hasunique = 1;
 140         }
 141         DRM_UNLOCK(dev);
 142
 143         if (hasunique)
 144                 SYSCTL_OUT(req, buf, strlen(buf));
 145
 146         SYSCTL_OUT(req, "", 1);
 147
 148 done:
 149         return retcode;
 150 }
 151
 152 /**
 153  * Called when "/proc/dri/.../vm" is read.
 154  *
 155  * Prints information about all mappings in drm_device::maplist.
 156  */
 157 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
 158 {
 159         char buf[128];
 160         int retcode;
 161         struct drm_device *dev = arg1;
 162         struct drm_local_map *map;
 163         struct drm_map_list *r_list;
 164
 165         /* Hardcoded from _DRM_FRAME_BUFFER,
 166            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
 167            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
 168         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 169         const char *type;
 170         int i;
 171
 172         DRM_LOCK(dev);
 173         DRM_SYSCTL_PRINT("\nslot offset         size       "
 174             "type flags address            handle mtrr\n");
 175         i = 0;
 176         list_for_each_entry(r_list, &dev->maplist, head) {
 177                 map = r_list->map;
 178                 if (!map)
 179                         continue;
 180                 if (map->type < 0 || map->type > 5)
 181                         type = "??";
 182                 else
 183                         type = types[map->type];
 184
 185                 DRM_SYSCTL_PRINT("%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 186                            i,
 187                            (unsigned long long)map->offset,
 188                            map->size, type, map->flags,
 189                            (unsigned long) r_list->user_token);
 190                 if (map->mtrr < 0)
 191                         DRM_SYSCTL_PRINT("none\n");
 192                 else
 193                         DRM_SYSCTL_PRINT("%4d\n", map->mtrr);
 194                 i++;
 195
 196         }
 197         SYSCTL_OUT(req, "", 1);
 198         DRM_UNLOCK(dev);
 199
 200 done:
 201         return 0;
 202 }
 203
 204 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
 205 {
 206         struct drm_device        *dev = arg1;
 207         struct drm_device_dma *dma = dev->dma;
 208         struct drm_device_dma tempdma;
 209         int *templists;
 210         int i;
 211         char buf[128];
 212         int retcode;
 213
 214         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
 215          * copy of the whole structure and the relevant data from buflist.
 216          */
 217         DRM_LOCK(dev);
 218         if (dma == NULL) {
 219                 DRM_UNLOCK(dev);
 220                 return 0;
 221         }
 222         tempdma = *dma;
 223         templists = kmalloc(sizeof(int) * dma->buf_count, M_DRM,
 224                             M_WAITOK | M_NULLOK);
 225         for (i = 0; i < dma->buf_count; i++)
 226                 templists[i] = dma->buflist[i]->list;
 227         dma = &tempdma;
 228         DRM_UNLOCK(dev);
 229
 230         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
 231         for (i = 0; i <= DRM_MAX_ORDER; i++) {
 232                 if (dma->bufs[i].buf_count)
 233                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d\n",
 234                                        i,
 235                                        dma->bufs[i].buf_size,
 236                                        dma->bufs[i].buf_count,
 237                                        dma->bufs[i].seg_count,
 238                                        dma->bufs[i].seg_count
 239                                        *(1 << dma->bufs[i].page_order),
 240                                        (dma->bufs[i].seg_count
 241                                         * (1 << dma->bufs[i].page_order))
 242                                        * (int)PAGE_SIZE / 1024);
 243         }
 244         DRM_SYSCTL_PRINT("\n");
 245         for (i = 0; i < dma->buf_count; i++) {
 246                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
 247                 DRM_SYSCTL_PRINT(" %d", templists[i]);
 248         }
 249         DRM_SYSCTL_PRINT("\n");
 250
 251         SYSCTL_OUT(req, "", 1);
 252 done:
 253         kfree(templists);
 254         return retcode;
 255 }
 256
 257 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 258 {
 259         struct drm_device *dev = arg1;
 260         struct drm_file *priv, *tempprivs;
 261         char buf[128];
 262         int retcode;
 263         int privcount, i;
 264
 265         DRM_LOCK(dev);
 266
 267         privcount = 0;
 268         list_for_each_entry(priv, &dev->filelist, lhead)
 269                 privcount++;
 270
 271         tempprivs = kmalloc(sizeof(struct drm_file) * privcount, M_DRM,
 272                             M_WAITOK | M_NULLOK);
 273         if (tempprivs == NULL) {
 274                 DRM_UNLOCK(dev);
 275                 return ENOMEM;
 276         }
 277         i = 0;
 278         list_for_each_entry(priv, &dev->filelist, lhead)
 279                 tempprivs[i++] = *priv;
 280
 281         DRM_UNLOCK(dev);
 282
 283         DRM_SYSCTL_PRINT(
 284             "\na dev            pid   uid      magic     ioctls\n");
 285         for (i = 0; i < privcount; i++) {
 286                 priv = &tempprivs[i];
 287                 DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
 288                                priv->authenticated ? 'y' : 'n',
 289                                devtoname(priv->dev->devnode),
 290                                priv->pid,
 291                                priv->uid,
 292                                priv->magic,
 293                                priv->ioctl_count);
 294         }
 295
 296         SYSCTL_OUT(req, "", 1);
 297 done:
 298         kfree(tempprivs);
 299         return retcode;
 300 }