src/freedreno/drm/freedreno_device.c

   1 /*
   2  * Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Rob Clark <robclark@freedesktop.org>
  25  */
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <unistd.h>
  30
  31 #include "freedreno_drmif.h"
  32 #include "freedreno_priv.h"
  33
  34 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
  35
  36 struct fd_device * kgsl_device_new(int fd);
  37 struct fd_device * msm_device_new(int fd);
  38
  39 struct fd_device * fd_device_new(int fd)
  40 {
  41         struct fd_device *dev;
  42         drmVersionPtr version;
  43
  44         /* figure out if we are kgsl or msm drm driver: */
  45         version = drmGetVersion(fd);
  46         if (!version) {
  47                 ERROR_MSG("cannot get version: %s", strerror(errno));
  48                 return NULL;
  49         }
  50
  51         if (!strcmp(version->name, "msm")) {
  52                 DEBUG_MSG("msm DRM device");
  53                 if (version->version_major != 1) {
  54                         ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
  55                                 version->version_minor, version->version_patchlevel);
  56                         dev = NULL;
  57                         goto out;
  58                 }
  59
  60                 dev = msm_device_new(fd);
  61                 dev->version = version->version_minor;
  62 #if HAVE_FREEDRENO_KGSL
  63         } else if (!strcmp(version->name, "kgsl")) {
  64                 DEBUG_MSG("kgsl DRM device");
  65                 dev = kgsl_device_new(fd);
  66 #endif
  67         } else {
  68                 ERROR_MSG("unknown device: %s", version->name);
  69                 dev = NULL;
  70         }
  71
  72 out:
  73         drmFreeVersion(version);
  74
  75         if (!dev)
  76                 return NULL;
  77
  78         p_atomic_set(&dev->refcnt, 1);
  79         dev->fd = fd;
  80         dev->handle_table = _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
  81         dev->name_table = _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
  82         fd_bo_cache_init(&dev->bo_cache, FALSE);
  83         fd_bo_cache_init(&dev->ring_cache, TRUE);
  84
  85         return dev;
  86 }
  87
  88 /* like fd_device_new() but creates it's own private dup() of the fd
  89  * which is close()d when the device is finalized.
  90  */
  91 struct fd_device * fd_device_new_dup(int fd)
  92 {
  93         int dup_fd = dup(fd);
  94         struct fd_device *dev = fd_device_new(dup_fd);
  95         if (dev)
  96                 dev->closefd = 1;
  97         else
  98                 close(dup_fd);
  99         return dev;
 100 }
 101
 102 struct fd_device * fd_device_ref(struct fd_device *dev)
 103 {
 104         p_atomic_inc(&dev->refcnt);
 105         return dev;
 106 }
 107
 108 static void fd_device_del_impl(struct fd_device *dev)
 109 {
 110         int close_fd = dev->closefd ? dev->fd : -1;
 111         fd_bo_cache_cleanup(&dev->bo_cache, 0);
 112         _mesa_hash_table_destroy(dev->handle_table, NULL);
 113         _mesa_hash_table_destroy(dev->name_table, NULL);
 114         dev->funcs->destroy(dev);
 115         if (close_fd >= 0)
 116                 close(close_fd);
 117 }
 118
 119 void fd_device_del_locked(struct fd_device *dev)
 120 {
 121         if (!atomic_dec_and_test(&dev->refcnt))
 122                 return;
 123         fd_device_del_impl(dev);
 124 }
 125
 126 void fd_device_del(struct fd_device *dev)
 127 {
 128         if (!atomic_dec_and_test(&dev->refcnt))
 129                 return;
 130         pthread_mutex_lock(&table_lock);
 131         fd_device_del_impl(dev);
 132         pthread_mutex_unlock(&table_lock);
 133 }
 134
 135 int fd_device_fd(struct fd_device *dev)
 136 {
 137         return dev->fd;
 138 }
 139
 140 enum fd_version fd_device_version(struct fd_device *dev)
 141 {
 142         return dev->version;
 143 }
 144
 145 bool fd_dbg(void)
 146 {
 147         static int dbg;
 148
 149         if (!dbg)
 150                 dbg = getenv("LIBGL_DEBUG") ? 1 : -1;
 151
 152         return dbg == 1;
 153 }