Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2010 Google, Inc.
3 * Author: Erik Gilling <konkers@android.com>
4 *
5 * Copyright (C) 2011-2013 NVIDIA Corporation
6 *
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18#include <linux/debugfs.h>
19#include <linux/seq_file.h>
20#include <linux/uaccess.h>
21
22#include <linux/io.h>
23
24#include "dev.h"
25#include "debug.h"
26#include "channel.h"
27
28unsigned int host1x_debug_trace_cmdbuf;
29
30static pid_t host1x_debug_force_timeout_pid;
31static u32 host1x_debug_force_timeout_val;
32static u32 host1x_debug_force_timeout_channel;
33
34void host1x_debug_output(struct output *o, const char *fmt, ...)
35{
36 va_list args;
37 int len;
38
39 va_start(args, fmt);
40 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
41 va_end(args);
42 o->fn(o->ctx, o->buf, len);
43}
44
45static int show_channels(struct host1x_channel *ch, void *data, bool show_fifo)
46{
47 struct host1x *m = dev_get_drvdata(ch->dev->parent);
48 struct output *o = data;
49
50 mutex_lock(&ch->reflock);
51 if (ch->refcount) {
52 mutex_lock(&ch->cdma.lock);
53 if (show_fifo)
54 host1x_hw_show_channel_fifo(m, ch, o);
55 host1x_hw_show_channel_cdma(m, ch, o);
56 mutex_unlock(&ch->cdma.lock);
57 }
58 mutex_unlock(&ch->reflock);
59
60 return 0;
61}
62
63static void show_syncpts(struct host1x *m, struct output *o)
64{
65 int i;
66 host1x_debug_output(o, "---- syncpts ----\n");
67 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
68 u32 max = host1x_syncpt_read_max(m->syncpt + i);
69 u32 min = host1x_syncpt_load(m->syncpt + i);
70 if (!min && !max)
71 continue;
72 host1x_debug_output(o, "id %d (%s) min %d max %d\n",
73 i, m->syncpt[i].name, min, max);
74 }
75
76 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
77 u32 base_val;
78 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
79 if (base_val)
80 host1x_debug_output(o, "waitbase id %d val %d\n", i,
81 base_val);
82 }
83
84 host1x_debug_output(o, "\n");
85}
86
87static void show_all(struct host1x *m, struct output *o)
88{
89 struct host1x_channel *ch;
90
91 host1x_hw_show_mlocks(m, o);
92 show_syncpts(m, o);
93 host1x_debug_output(o, "---- channels ----\n");
94
95 host1x_for_each_channel(m, ch)
96 show_channels(ch, o, true);
97}
98
99#ifdef CONFIG_DEBUG_FS
100static void show_all_no_fifo(struct host1x *host1x, struct output *o)
101{
102 struct host1x_channel *ch;
103
104 host1x_hw_show_mlocks(host1x, o);
105 show_syncpts(host1x, o);
106 host1x_debug_output(o, "---- channels ----\n");
107
108 host1x_for_each_channel(host1x, ch)
109 show_channels(ch, o, false);
110}
111
112static int host1x_debug_show_all(struct seq_file *s, void *unused)
113{
114 struct output o = {
115 .fn = write_to_seqfile,
116 .ctx = s
117 };
118 show_all(s->private, &o);
119 return 0;
120}
121
122static int host1x_debug_show(struct seq_file *s, void *unused)
123{
124 struct output o = {
125 .fn = write_to_seqfile,
126 .ctx = s
127 };
128 show_all_no_fifo(s->private, &o);
129 return 0;
130}
131
132static int host1x_debug_open_all(struct inode *inode, struct file *file)
133{
134 return single_open(file, host1x_debug_show_all, inode->i_private);
135}
136
137static const struct file_operations host1x_debug_all_fops = {
138 .open = host1x_debug_open_all,
139 .read = seq_read,
140 .llseek = seq_lseek,
141 .release = single_release,
142};
143
144static int host1x_debug_open(struct inode *inode, struct file *file)
145{
146 return single_open(file, host1x_debug_show, inode->i_private);
147}
148
149static const struct file_operations host1x_debug_fops = {
150 .open = host1x_debug_open,
151 .read = seq_read,
152 .llseek = seq_lseek,
153 .release = single_release,
154};
155
156void host1x_debug_init(struct host1x *host1x)
157{
158 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
159
160 if (!de)
161 return;
162
163 /* Store the created entry */
164 host1x->debugfs = de;
165
166 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
167 debugfs_create_file("status_all", S_IRUGO, de, host1x,
168 &host1x_debug_all_fops);
169
170 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
171 &host1x_debug_trace_cmdbuf);
172
173 host1x_hw_debug_init(host1x, de);
174
175 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
176 &host1x_debug_force_timeout_pid);
177 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
178 &host1x_debug_force_timeout_val);
179 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
180 &host1x_debug_force_timeout_channel);
181}
182
183void host1x_debug_deinit(struct host1x *host1x)
184{
185 debugfs_remove_recursive(host1x->debugfs);
186}
187#else
188void host1x_debug_init(struct host1x *host1x)
189{
190}
191void host1x_debug_deinit(struct host1x *host1x)
192{
193}
194#endif
195
196void host1x_debug_dump(struct host1x *host1x)
197{
198 struct output o = {
199 .fn = write_to_printk
200 };
201 show_all(host1x, &o);
202}
203
204void host1x_debug_dump_syncpts(struct host1x *host1x)
205{
206 struct output o = {
207 .fn = write_to_printk
208 };
209 show_syncpts(host1x, &o);
210}