freedreno_device.c revision baaff307 
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
40static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
41
42struct fd_device * kgsl_device_new(int fd);
43struct fd_device * msm_device_new(int fd);
44
45static void
46add_bucket(struct fd_device *dev, int size)
47{
48	unsigned int i = dev->num_buckets;
49
50	assert(i < ARRAY_SIZE(dev->cache_bucket));
51
52	list_inithead(&dev->cache_bucket[i].list);
53	dev->cache_bucket[i].size = size;
54	dev->num_buckets++;
55}
56
57static void
58init_cache_buckets(struct fd_device *dev)
59{
60	unsigned long size, cache_max_size = 64 * 1024 * 1024;
61
62	/* OK, so power of two buckets was too wasteful of memory.
63	 * Give 3 other sizes between each power of two, to hopefully
64	 * cover things accurately enough.  (The alternative is
65	 * probably to just go for exact matching of sizes, and assume
66	 * that for things like composited window resize the tiled
67	 * width/height alignment and rounding of sizes to pages will
68	 * get us useful cache hit rates anyway)
69	 */
70	add_bucket(dev, 4096);
71	add_bucket(dev, 4096 * 2);
72	add_bucket(dev, 4096 * 3);
73
74	/* Initialize the linked lists for BO reuse cache. */
75	for (size = 4 * 4096; size <= cache_max_size; size *= 2) {
76		add_bucket(dev, size);
77		add_bucket(dev, size + size * 1 / 4);
78		add_bucket(dev, size + size * 2 / 4);
79		add_bucket(dev, size + size * 3 / 4);
80	}
81}
82
83drm_public struct fd_device * fd_device_new(int fd)
84{
85	struct fd_device *dev;
86	drmVersionPtr version;
87
88	/* figure out if we are kgsl or msm drm driver: */
89	version = drmGetVersion(fd);
90	if (!version) {
91		ERROR_MSG("cannot get version: %s", strerror(errno));
92		return NULL;
93	}
94
95	if (!strcmp(version->name, "kgsl")) {
96		DEBUG_MSG("kgsl DRM device");
97		dev = kgsl_device_new(fd);
98	} else if (!strcmp(version->name, "msm")) {
99		DEBUG_MSG("msm DRM device");
100		dev = msm_device_new(fd);
101	} else {
102		ERROR_MSG("unknown device: %s", version->name);
103		dev = NULL;
104	}
105	drmFreeVersion(version);
106
107	if (!dev)
108		return NULL;
109
110	atomic_set(&dev->refcnt, 1);
111	dev->fd = fd;
112	dev->handle_table = drmHashCreate();
113	dev->name_table = drmHashCreate();
114	init_cache_buckets(dev);
115
116	return dev;
117}
118
119/* like fd_device_new() but creates it's own private dup() of the fd
120 * which is close()d when the device is finalized.
121 */
122drm_public struct fd_device * fd_device_new_dup(int fd)
123{
124	struct fd_device *dev = fd_device_new(dup(fd));
125	if (dev)
126		dev->closefd = 1;
127	return dev;
128}
129
130drm_public struct fd_device * fd_device_ref(struct fd_device *dev)
131{
132	atomic_inc(&dev->refcnt);
133	return dev;
134}
135
136static void fd_device_del_impl(struct fd_device *dev)
137{
138	fd_cleanup_bo_cache(dev, 0);
139	drmHashDestroy(dev->handle_table);
140	drmHashDestroy(dev->name_table);
141	if (dev->closefd)
142		close(dev->fd);
143	dev->funcs->destroy(dev);
144}
145
146void fd_device_del_locked(struct fd_device *dev)
147{
148	if (!atomic_dec_and_test(&dev->refcnt))
149		return;
150	fd_device_del_impl(dev);
151}
152
153drm_public void fd_device_del(struct fd_device *dev)
154{
155	if (!atomic_dec_and_test(&dev->refcnt))
156		return;
157	pthread_mutex_lock(&table_lock);
158	fd_device_del_impl(dev);
159	pthread_mutex_unlock(&table_lock);
160}
161