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-rw-r--r--drivers/video/tegra/host/debug.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/drivers/video/tegra/host/debug.c b/drivers/video/tegra/host/debug.c
new file mode 100644
index 00000000000..91436c903fc
--- /dev/null
+++ b/drivers/video/tegra/host/debug.c
@@ -0,0 +1,167 @@
1/*
2 * drivers/video/tegra/host/debug.c
3 *
4 * Copyright (C) 2010 Google, Inc.
5 * Author: Erik Gilling <konkers@android.com>
6 *
7 * Copyright (C) 2011 NVIDIA Corporation
8 *
9 * This software is licensed under the terms of the GNU General Public
10 * License version 2, as published by the Free Software Foundation, and
11 * may be copied, distributed, and modified under those terms.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 */
19
20#include <linux/debugfs.h>
21#include <linux/seq_file.h>
22
23#include <linux/io.h>
24
25#include "dev.h"
26#include "debug.h"
27
28pid_t nvhost_debug_null_kickoff_pid;
29unsigned int nvhost_debug_trace_cmdbuf;
30
31pid_t nvhost_debug_force_timeout_pid;
32u32 nvhost_debug_force_timeout_val;
33u32 nvhost_debug_force_timeout_channel;
34
35void nvhost_debug_output(struct output *o, const char* fmt, ...)
36{
37 va_list args;
38 int len;
39
40 va_start(args, fmt);
41 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
42 va_end(args);
43 o->fn(o->ctx, o->buf, len);
44}
45
46static int show_channels(struct device *dev, void *data)
47{
48 struct nvhost_channel *ch;
49 struct nvhost_device *nvdev = to_nvhost_device(dev);
50 struct output *o = data;
51 struct nvhost_master *m;
52
53 if (nvdev == NULL)
54 return 0;
55
56 m = nvhost_get_host(nvdev);
57 ch = nvdev->channel;
58 if (ch) {
59 mutex_lock(&ch->reflock);
60 if (ch->refcount) {
61 mutex_lock(&ch->cdma.lock);
62 m->op.debug.show_channel_fifo(m, ch, o, nvdev->index);
63 m->op.debug.show_channel_cdma(m, ch, o, nvdev->index);
64 mutex_unlock(&ch->cdma.lock);
65 }
66 mutex_unlock(&ch->reflock);
67 }
68
69 return 0;
70}
71
72static void show_syncpts(struct nvhost_master *m, struct output *o)
73{
74 int i;
75 BUG_ON(!m->op.syncpt.name);
76 nvhost_debug_output(o, "---- syncpts ----\n");
77 for (i = 0; i < m->syncpt.nb_pts; i++) {
78 u32 max = nvhost_syncpt_read_max(&m->syncpt, i);
79 u32 min = nvhost_syncpt_update_min(&m->syncpt, i);
80 if (!min && !max)
81 continue;
82 nvhost_debug_output(o, "id %d (%s) min %d max %d\n",
83 i, m->op.syncpt.name(&m->syncpt, i),
84 min, max);
85 }
86
87 for (i = 0; i < m->syncpt.nb_bases; i++) {
88 u32 base_val;
89 base_val = nvhost_syncpt_read_wait_base(&m->syncpt, i);
90 if (base_val)
91 nvhost_debug_output(o, "waitbase id %d val %d\n",
92 i, base_val);
93 }
94
95 nvhost_debug_output(o, "\n");
96}
97
98static void show_all(struct nvhost_master *m, struct output *o)
99{
100 nvhost_module_busy(m->dev);
101
102 m->op.debug.show_mlocks(m, o);
103 show_syncpts(m, o);
104 nvhost_debug_output(o, "---- channels ----\n");
105 bus_for_each_dev(&nvhost_bus_type, NULL, o, show_channels);
106
107 nvhost_module_idle(m->dev);
108}
109
110#ifdef CONFIG_DEBUG_FS
111static int nvhost_debug_show(struct seq_file *s, void *unused)
112{
113 struct output o = {
114 .fn = write_to_seqfile,
115 .ctx = s
116 };
117 show_all(s->private, &o);
118 return 0;
119}
120
121static int nvhost_debug_open(struct inode *inode, struct file *file)
122{
123 return single_open(file, nvhost_debug_show, inode->i_private);
124}
125
126static const struct file_operations nvhost_debug_fops = {
127 .open = nvhost_debug_open,
128 .read = seq_read,
129 .llseek = seq_lseek,
130 .release = single_release,
131};
132
133void nvhost_debug_init(struct nvhost_master *master)
134{
135 struct dentry *de = debugfs_create_dir("tegra_host", NULL);
136
137 debugfs_create_file("status", S_IRUGO, de,
138 master, &nvhost_debug_fops);
139
140 debugfs_create_u32("null_kickoff_pid", S_IRUGO|S_IWUSR, de,
141 &nvhost_debug_null_kickoff_pid);
142 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
143 &nvhost_debug_trace_cmdbuf);
144
145 if (master->op.debug.debug_init)
146 master->op.debug.debug_init(de);
147
148 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
149 &nvhost_debug_force_timeout_pid);
150 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
151 &nvhost_debug_force_timeout_val);
152 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
153 &nvhost_debug_force_timeout_channel);
154}
155#else
156void nvhost_debug_init(struct nvhost_master *master)
157{
158}
159#endif
160
161void nvhost_debug_dump(struct nvhost_master *master)
162{
163 struct output o = {
164 .fn = write_to_printk
165 };
166 show_all(master, &o);
167}