etnaviv: add drm-shim
[mesa.git] / 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 }