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