freedreno/freedreno_device.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <unistd.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         atomic_set(&dev->refcnt, 1);
  81         dev->fd = fd;
  82         dev->handle_table = drmHashCreate();
  83         dev->name_table = drmHashCreate();
  84         fd_bo_cache_init(&dev->bo_cache, FALSE);
  85
  86         return dev;
  87 }
  88
  89 /* like fd_device_new() but creates it's own private dup() of the fd
  90  * which is close()d when the device is finalized.
  91  */
  92 struct fd_device * fd_device_new_dup(int fd)
  93 {
  94         int dup_fd = dup(fd);
  95         struct fd_device *dev = fd_device_new(dup_fd);
  96         if (dev)
  97                 dev->closefd = 1;
  98         else
  99                 close(dup_fd);
 100         return dev;
 101 }
 102
 103 struct fd_device * fd_device_ref(struct fd_device *dev)
 104 {
 105         atomic_inc(&dev->refcnt);
 106         return dev;
 107 }
 108
 109 static void fd_device_del_impl(struct fd_device *dev)
 110 {
 111         int close_fd = dev->closefd ? dev->fd : -1;
 112         fd_bo_cache_cleanup(&dev->bo_cache, 0);
 113         drmHashDestroy(dev->handle_table);
 114         drmHashDestroy(dev->name_table);
 115         dev->funcs->destroy(dev);
 116         if (close_fd >= 0)
 117                 close(close_fd);
 118 }
 119
 120 drm_private void fd_device_del_locked(struct fd_device *dev)
 121 {
 122         if (!atomic_dec_and_test(&dev->refcnt))
 123                 return;
 124         fd_device_del_impl(dev);
 125 }
 126
 127 void fd_device_del(struct fd_device *dev)
 128 {
 129         if (!atomic_dec_and_test(&dev->refcnt))
 130                 return;
 131         pthread_mutex_lock(&table_lock);
 132         fd_device_del_impl(dev);
 133         pthread_mutex_unlock(&table_lock);
 134 }
 135
 136 int fd_device_fd(struct fd_device *dev)
 137 {
 138         return dev->fd;
 139 }
 140
 141 enum fd_version fd_device_version(struct fd_device *dev)
 142 {
 143         return dev->version;
 144 }