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
  29 #include "etnaviv_priv.h"
  30 #include "etnaviv_drmif.h"
  31
  32 static pthread_mutex_t etna_drm_table_lock = PTHREAD_MUTEX_INITIALIZER;
  33
  34 static uint32_t
  35 u32_hash(const void *key)
  36 {
  37         return _mesa_hash_data(key, sizeof(uint32_t));
  38 }
  39
  40 static bool
  41 u32_equals(const void *key1, const void *key2)
  42 {
  43         return *(const uint32_t *)key1 == *(const uint32_t *)key2;
  44 }
  45
  46 struct etna_device *etna_device_new(int fd)
  47 {
  48         struct etna_device *dev = calloc(sizeof(*dev), 1);
  49         struct drm_etnaviv_param req = {
  50                 .param = ETNAVIV_PARAM_SOFTPIN_START_ADDR,
  51         };
  52         int ret;
  53
  54         if (!dev)
  55                 return NULL;
  56
  57         p_atomic_set(&dev->refcnt, 1);
  58         dev->fd = fd;
  59         dev->handle_table = _mesa_hash_table_create(NULL, u32_hash, u32_equals);
  60         dev->name_table = _mesa_hash_table_create(NULL, u32_hash, u32_equals);
  61         etna_bo_cache_init(&dev->bo_cache);
  62
  63         ret = drmCommandWriteRead(dev->fd, DRM_ETNAVIV_GET_PARAM, &req, sizeof(req));
  64         if (!ret && req.value != ~0ULL) {
  65                 const uint64_t _4GB = 1ull << 32;
  66
  67                 util_vma_heap_init(&dev->address_space, req.value, _4GB - req.value);
  68                 dev->use_softpin = 1;
  69         }
  70
  71         return dev;
  72 }
  73
  74 /* like etna_device_new() but creates it's own private dup() of the fd
  75  * which is close()d when the device is finalized. */
  76 struct etna_device *etna_device_new_dup(int fd)
  77 {
  78         int dup_fd = dup(fd);
  79         struct etna_device *dev = etna_device_new(dup_fd);
  80
  81         if (dev)
  82                 dev->closefd = 1;
  83         else
  84                 close(dup_fd);
  85
  86         return dev;
  87 }
  88
  89 struct etna_device *etna_device_ref(struct etna_device *dev)
  90 {
  91         p_atomic_inc(&dev->refcnt);
  92
  93         return dev;
  94 }
  95
  96 static void etna_device_del_impl(struct etna_device *dev)
  97 {
  98         etna_bo_cache_cleanup(&dev->bo_cache, 0);
  99
 100         if (dev->use_softpin)
 101                 util_vma_heap_finish(&dev->address_space);
 102
 103         _mesa_hash_table_destroy(dev->handle_table, NULL);
 104         _mesa_hash_table_destroy(dev->name_table, NULL);
 105
 106         if (dev->closefd)
 107                 close(dev->fd);
 108
 109         free(dev);
 110 }
 111
 112 void etna_device_del_locked(struct etna_device *dev)
 113 {
 114         if (!p_atomic_dec_zero(&dev->refcnt))
 115                 return;
 116
 117         etna_device_del_impl(dev);
 118 }
 119
 120 void etna_device_del(struct etna_device *dev)
 121 {
 122         if (!p_atomic_dec_zero(&dev->refcnt))
 123                 return;
 124
 125         pthread_mutex_lock(&etna_drm_table_lock);
 126         etna_device_del_impl(dev);
 127         pthread_mutex_unlock(&etna_drm_table_lock);
 128 }
 129
 130 int etna_device_fd(struct etna_device *dev)
 131 {
 132    return dev->fd;
 133 }
 134
 135 bool etnaviv_device_softpin_capable(struct etna_device *dev)
 136 {
 137         return !!dev->use_softpin;
 138 }