src/etnaviv/drm/etnaviv_device.c

   1 /*
   2  * Copyright (C) 2014 Etnaviv Project
   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  *    Christian Gmeiner <christian.gmeiner@gmail.com>
  25  */
  26
  27 #include "util/hash_table.h"
  28 #include "util/os_file.h"
  29
  30 #include "etnaviv_priv.h"
  31 #include "etnaviv_drmif.h"
  32
  33 static pthread_mutex_t etna_drm_table_lock = PTHREAD_MUTEX_INITIALIZER;
  34
  35 struct etna_device *etna_device_new(int fd)
  36 {
  37         struct etna_device *dev = calloc(sizeof(*dev), 1);
  38         struct drm_etnaviv_param req = {
  39                 .param = ETNAVIV_PARAM_SOFTPIN_START_ADDR,
  40         };
  41         int ret;
  42
  43         if (!dev)
  44                 return NULL;
  45
  46         p_atomic_set(&dev->refcnt, 1);
  47         dev->fd = fd;
  48         dev->handle_table = _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
  49         dev->name_table = _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
  50         etna_bo_cache_init(&dev->bo_cache);
  51
  52         ret = drmCommandWriteRead(dev->fd, DRM_ETNAVIV_GET_PARAM, &req, sizeof(req));
  53         if (!ret && req.value != ~0ULL) {
  54                 const uint64_t _4GB = 1ull << 32;
  55
  56                 util_vma_heap_init(&dev->address_space, req.value, _4GB - req.value);
  57                 dev->use_softpin = 1;
  58         }
  59
  60         return dev;
  61 }
  62
  63 /* like etna_device_new() but creates it's own private dup() of the fd
  64  * which is close()d when the device is finalized. */
  65 struct etna_device *etna_device_new_dup(int fd)
  66 {
  67         int dup_fd = os_dupfd_cloexec(fd);
  68         struct etna_device *dev = etna_device_new(dup_fd);
  69
  70         if (dev)
  71                 dev->closefd = 1;
  72         else
  73                 close(dup_fd);
  74
  75         return dev;
  76 }
  77
  78 struct etna_device *etna_device_ref(struct etna_device *dev)
  79 {
  80         p_atomic_inc(&dev->refcnt);
  81
  82         return dev;
  83 }
  84
  85 static void etna_device_del_impl(struct etna_device *dev)
  86 {
  87         etna_bo_cache_cleanup(&dev->bo_cache, 0);
  88
  89         if (dev->use_softpin)
  90                 util_vma_heap_finish(&dev->address_space);
  91
  92         _mesa_hash_table_destroy(dev->handle_table, NULL);
  93         _mesa_hash_table_destroy(dev->name_table, NULL);
  94
  95         if (dev->closefd)
  96                 close(dev->fd);
  97
  98         free(dev);
  99 }
 100
 101 void etna_device_del_locked(struct etna_device *dev)
 102 {
 103         if (!p_atomic_dec_zero(&dev->refcnt))
 104                 return;
 105
 106         etna_device_del_impl(dev);
 107 }
 108
 109 void etna_device_del(struct etna_device *dev)
 110 {
 111         if (!p_atomic_dec_zero(&dev->refcnt))
 112                 return;
 113
 114         pthread_mutex_lock(&etna_drm_table_lock);
 115         etna_device_del_impl(dev);
 116         pthread_mutex_unlock(&etna_drm_table_lock);
 117 }
 118
 119 int etna_device_fd(struct etna_device *dev)
 120 {
 121    return dev->fd;
 122 }
 123
 124 bool etnaviv_device_softpin_capable(struct etna_device *dev)
 125 {
 126         return !!dev->use_softpin;
 127 }