freedreno_device.c revision e88f27b3 
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;
37static void * dev_table;
38
39struct fd_device * kgsl_device_new(int fd);
40struct fd_device * msm_device_new(int fd);
41
42static void
43add_bucket(struct fd_device *dev, int size)
44{
45	unsigned int i = dev->num_buckets;
46
47	assert(i < ARRAY_SIZE(dev->cache_bucket));
48
49	list_inithead(&dev->cache_bucket[i].list);
50	dev->cache_bucket[i].size = size;
51	dev->num_buckets++;
52}
53
54static void
55init_cache_buckets(struct fd_device *dev)
56{
57	unsigned long size, cache_max_size = 64 * 1024 * 1024;
58
59	/* OK, so power of two buckets was too wasteful of memory.
60	 * Give 3 other sizes between each power of two, to hopefully
61	 * cover things accurately enough.  (The alternative is
62	 * probably to just go for exact matching of sizes, and assume
63	 * that for things like composited window resize the tiled
64	 * width/height alignment and rounding of sizes to pages will
65	 * get us useful cache hit rates anyway)
66	 */
67	add_bucket(dev, 4096);
68	add_bucket(dev, 4096 * 2);
69	add_bucket(dev, 4096 * 3);
70
71	/* Initialize the linked lists for BO reuse cache. */
72	for (size = 4 * 4096; size <= cache_max_size; size *= 2) {
73		add_bucket(dev, size);
74		add_bucket(dev, size + size * 1 / 4);
75		add_bucket(dev, size + size * 2 / 4);
76		add_bucket(dev, size + size * 3 / 4);
77	}
78}
79
80static struct fd_device * fd_device_new_impl(int fd)
81{
82	struct fd_device *dev;
83	drmVersionPtr version;
84
85	/* figure out if we are kgsl or msm drm driver: */
86	version = drmGetVersion(fd);
87	if (!version) {
88		ERROR_MSG("cannot get version: %s", strerror(errno));
89		return NULL;
90	}
91
92	if (!strcmp(version->name, "kgsl")) {
93		DEBUG_MSG("kgsl DRM device");
94		dev = kgsl_device_new(fd);
95	} else if (!strcmp(version->name, "msm")) {
96		DEBUG_MSG("msm DRM device");
97		dev = msm_device_new(fd);
98	} else {
99		ERROR_MSG("unknown device: %s", version->name);
100		dev = NULL;
101	}
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
115struct fd_device * fd_device_new(int fd)
116{
117	struct fd_device *dev = NULL;
118	int key = fd;
119
120	pthread_mutex_lock(&table_lock);
121
122	if (!dev_table)
123		dev_table = drmHashCreate();
124
125	if (drmHashLookup(dev_table, key, (void **)&dev)) {
126		dev = fd_device_new_impl(fd);
127		if (dev)
128			drmHashInsert(dev_table, key, dev);
129	} else {
130		dev = fd_device_ref(dev);
131	}
132
133	pthread_mutex_unlock(&table_lock);
134
135	return dev;
136}
137
138/* like fd_device_new() but creates it's own private dup() of the fd
139 * which is close()d when the device is finalized.
140 */
141struct fd_device * fd_device_new_dup(int fd)
142{
143	struct fd_device *dev = fd_device_new(dup(fd));
144	dev->closefd = 1;
145	return dev;
146}
147
148struct fd_device * fd_device_ref(struct fd_device *dev)
149{
150	atomic_inc(&dev->refcnt);
151	return dev;
152}
153
154static void fd_device_del_impl(struct fd_device *dev)
155{
156	fd_cleanup_bo_cache(dev, 0);
157	drmHashDestroy(dev->handle_table);
158	drmHashDestroy(dev->name_table);
159	drmHashDelete(dev_table, dev->fd);
160	if (dev->closefd)
161		close(dev->fd);
162	dev->funcs->destroy(dev);
163}
164
165void fd_device_del_locked(struct fd_device *dev)
166{
167	if (!atomic_dec_and_test(&dev->refcnt))
168		return;
169	fd_device_del_impl(dev);
170}
171
172void fd_device_del(struct fd_device *dev)
173{
174	if (!atomic_dec_and_test(&dev->refcnt))
175		return;
176	pthread_mutex_lock(&table_lock);
177	fd_device_del_impl(dev);
178	pthread_mutex_unlock(&table_lock);
179}
180