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 "util/os_file.h"
  32
  33 #include "freedreno_drmif.h"
  34 #include "freedreno_priv.h"
  35
  36 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
  37
  38 struct fd_device * kgsl_device_new(int fd);
  39 struct fd_device * msm_device_new(int fd);
  40
  41 struct fd_device * fd_device_new(int fd)
  42 {
  43         struct fd_device *dev;
  44         drmVersionPtr version;
  45
  46         /* figure out if we are kgsl or msm drm driver: */
  47         version = drmGetVersion(fd);
  48         if (!version) {
  49                 ERROR_MSG("cannot get version: %s", strerror(errno));
  50                 return NULL;
  51         }
  52
  53         if (!strcmp(version->name, "msm")) {
  54                 DEBUG_MSG("msm DRM device");
  55                 if (version->version_major != 1) {
  56                         ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
  57                                 version->version_minor, version->version_patchlevel);
  58                         dev = NULL;
  59                         goto out;
  60                 }
  61
  62                 dev = msm_device_new(fd);
  63                 dev->version = version->version_minor;
  64 #if HAVE_FREEDRENO_KGSL
  65         } else if (!strcmp(version->name, "kgsl")) {
  66                 DEBUG_MSG("kgsl DRM device");
  67                 dev = kgsl_device_new(fd);
  68 #endif
  69         } else {
  70                 ERROR_MSG("unknown device: %s", version->name);
  71                 dev = NULL;
  72         }
  73
  74 out:
  75         drmFreeVersion(version);
  76
  77         if (!dev)
  78                 return NULL;
  79
  80         p_atomic_set(&dev->refcnt, 1);
  81         dev->fd = fd;
  82         dev->handle_table = _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
  83         dev->name_table = _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
  84         fd_bo_cache_init(&dev->bo_cache, false);
  85         fd_bo_cache_init(&dev->ring_cache, true);
  86
  87         return dev;
  88 }
  89
  90 /* like fd_device_new() but creates it's own private dup() of the fd
  91  * which is close()d when the device is finalized.
  92  */
  93 struct fd_device * fd_device_new_dup(int fd)
  94 {
  95         int dup_fd = os_dupfd_cloexec(fd);
  96         struct fd_device *dev = fd_device_new(dup_fd);
  97         if (dev)
  98                 dev->closefd = 1;
  99         else
 100                 close(dup_fd);
 101         return dev;
 102 }
 103
 104 struct fd_device * fd_device_ref(struct fd_device *dev)
 105 {
 106         p_atomic_inc(&dev->refcnt);
 107         return dev;
 108 }
 109
 110 static void fd_device_del_impl(struct fd_device *dev)
 111 {
 112         int close_fd = dev->closefd ? dev->fd : -1;
 113         fd_bo_cache_cleanup(&dev->bo_cache, 0);
 114         _mesa_hash_table_destroy(dev->handle_table, NULL);
 115         _mesa_hash_table_destroy(dev->name_table, NULL);
 116         dev->funcs->destroy(dev);
 117         if (close_fd >= 0)
 118                 close(close_fd);
 119 }
 120
 121 void fd_device_del_locked(struct fd_device *dev)
 122 {
 123         if (!atomic_dec_and_test(&dev->refcnt))
 124                 return;
 125         fd_device_del_impl(dev);
 126 }
 127
 128 void fd_device_del(struct fd_device *dev)
 129 {
 130         if (!atomic_dec_and_test(&dev->refcnt))
 131                 return;
 132         pthread_mutex_lock(&table_lock);
 133         fd_device_del_impl(dev);
 134         pthread_mutex_unlock(&table_lock);
 135 }
 136
 137 int fd_device_fd(struct fd_device *dev)
 138 {
 139         return dev->fd;
 140 }
 141
 142 enum fd_version fd_device_version(struct fd_device *dev)
 143 {
 144         return dev->version;
 145 }
 146
 147 bool fd_dbg(void)
 148 {
 149         static int dbg;
 150
 151         if (!dbg)
 152                 dbg = getenv("LIBGL_DEBUG") ? 1 : -1;
 153
 154         return dbg == 1;
 155 }
 156
 157 bool fd_has_syncobj(struct fd_device *dev)
 158 {
 159         uint64_t value;
 160         if (drmGetCap(dev->fd, DRM_CAP_SYNCOBJ, &value))
 161                 return false;
 162         return value && dev->version >= FD_VERSION_FENCE_FD;
 163 }