freedreno_device.c revision 857b0bc6 
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
36static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
37
38struct fd_device * kgsl_device_new(int fd);
39struct fd_device * msm_device_new(int fd);
40
41static void
42add_bucket(struct fd_device *dev, int size)
43{
44	unsigned int i = dev->num_buckets;
45
46	assert(i < ARRAY_SIZE(dev->cache_bucket));
47
48	list_inithead(&dev->cache_bucket[i].list);
49	dev->cache_bucket[i].size = size;
50	dev->num_buckets++;
51}
52
53static void
54init_cache_buckets(struct fd_device *dev)
55{
56	unsigned long size, cache_max_size = 64 * 1024 * 1024;
57
58	/* OK, so power of two buckets was too wasteful of memory.
59	 * Give 3 other sizes between each power of two, to hopefully
60	 * cover things accurately enough.  (The alternative is
61	 * probably to just go for exact matching of sizes, and assume
62	 * that for things like composited window resize the tiled
63	 * width/height alignment and rounding of sizes to pages will
64	 * get us useful cache hit rates anyway)
65	 */
66	add_bucket(dev, 4096);
67	add_bucket(dev, 4096 * 2);
68	add_bucket(dev, 4096 * 3);
69
70	/* Initialize the linked lists for BO reuse cache. */
71	for (size = 4 * 4096; size <= cache_max_size; size *= 2) {
72		add_bucket(dev, size);
73		add_bucket(dev, size + size * 1 / 4);
74		add_bucket(dev, size + size * 2 / 4);
75		add_bucket(dev, size + size * 3 / 4);
76	}
77}
78
79struct fd_device * fd_device_new(int fd)
80{
81	struct fd_device *dev;
82	drmVersionPtr version;
83
84	/* figure out if we are kgsl or msm drm driver: */
85	version = drmGetVersion(fd);
86	if (!version) {
87		ERROR_MSG("cannot get version: %s", strerror(errno));
88		return NULL;
89	}
90
91	if (!strcmp(version->name, "kgsl")) {
92		DEBUG_MSG("kgsl DRM device");
93		dev = kgsl_device_new(fd);
94	} else if (!strcmp(version->name, "msm")) {
95		DEBUG_MSG("msm DRM device");
96		dev = msm_device_new(fd);
97	} else {
98		ERROR_MSG("unknown device: %s", version->name);
99		dev = NULL;
100	}
101	drmFreeVersion(version);
102
103	if (!dev)
104		return NULL;
105
106	atomic_set(&dev->refcnt, 1);
107	dev->fd = fd;
108	dev->handle_table = drmHashCreate();
109	dev->name_table = drmHashCreate();
110	init_cache_buckets(dev);
111
112	return dev;
113}
114
115/* like fd_device_new() but creates it's own private dup() of the fd
116 * which is close()d when the device is finalized.
117 */
118struct fd_device * fd_device_new_dup(int fd)
119{
120	struct fd_device *dev = fd_device_new(dup(fd));
121	if (dev)
122		dev->closefd = 1;
123	return dev;
124}
125
126struct fd_device * fd_device_ref(struct fd_device *dev)
127{
128	atomic_inc(&dev->refcnt);
129	return dev;
130}
131
132static void fd_device_del_impl(struct fd_device *dev)
133{
134	fd_cleanup_bo_cache(dev, 0);
135	drmHashDestroy(dev->handle_table);
136	drmHashDestroy(dev->name_table);
137	if (dev->closefd)
138		close(dev->fd);
139	dev->funcs->destroy(dev);
140}
141
142void fd_device_del_locked(struct fd_device *dev)
143{
144	if (!atomic_dec_and_test(&dev->refcnt))
145		return;
146	fd_device_del_impl(dev);
147}
148
149void fd_device_del(struct fd_device *dev)
150{
151	if (!atomic_dec_and_test(&dev->refcnt))
152		return;
153	pthread_mutex_lock(&table_lock);
154	fd_device_del_impl(dev);
155	pthread_mutex_unlock(&table_lock);
156}
157