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9#include <linux/debugfs.h>
10#include <linux/pm_runtime.h>
11#include <linux/seq_file.h>
12#include <linux/uaccess.h>
13
14#include <linux/io.h>
15
16#include "dev.h"
17#include "debug.h"
18#include "channel.h"
19
20static DEFINE_MUTEX(debug_lock);
21
22unsigned int host1x_debug_trace_cmdbuf;
23
24static pid_t host1x_debug_force_timeout_pid;
25static u32 host1x_debug_force_timeout_val;
26static u32 host1x_debug_force_timeout_channel;
27
28void host1x_debug_output(struct output *o, const char *fmt, ...)
29{
30 va_list args;
31 int len;
32
33 va_start(args, fmt);
34 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
35 va_end(args);
36
37 o->fn(o->ctx, o->buf, len, false);
38}
39
40void host1x_debug_cont(struct output *o, const char *fmt, ...)
41{
42 va_list args;
43 int len;
44
45 va_start(args, fmt);
46 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
47 va_end(args);
48
49 o->fn(o->ctx, o->buf, len, true);
50}
51
52static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
53{
54 struct host1x *m = dev_get_drvdata(ch->dev->parent);
55 struct output *o = data;
56 int err;
57
58 err = pm_runtime_resume_and_get(m->dev);
59 if (err < 0)
60 return err;
61
62 mutex_lock(&ch->cdma.lock);
63 mutex_lock(&debug_lock);
64
65 if (show_fifo)
66 host1x_hw_show_channel_fifo(m, ch, o);
67
68 host1x_hw_show_channel_cdma(m, ch, o);
69
70 mutex_unlock(&debug_lock);
71 mutex_unlock(&ch->cdma.lock);
72
73 pm_runtime_put(m->dev);
74
75 return 0;
76}
77
78static void show_syncpts(struct host1x *m, struct output *o)
79{
80 struct list_head *pos;
81 unsigned int i;
82 int err;
83
84 host1x_debug_output(o, "---- syncpts ----\n");
85
86 err = pm_runtime_resume_and_get(m->dev);
87 if (err < 0)
88 return;
89
90 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
91 u32 max = host1x_syncpt_read_max(m->syncpt + i);
92 u32 min = host1x_syncpt_load(m->syncpt + i);
93 unsigned int waiters = 0;
94
95 spin_lock(&m->syncpt[i].intr.lock);
96 list_for_each(pos, &m->syncpt[i].intr.wait_head)
97 waiters++;
98 spin_unlock(&m->syncpt[i].intr.lock);
99
100 if (!min && !max && !waiters)
101 continue;
102
103 host1x_debug_output(o,
104 "id %u (%s) min %d max %d (%d waiters)\n",
105 i, m->syncpt[i].name, min, max, waiters);
106 }
107
108 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
109 u32 base_val;
110
111 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
112 if (base_val)
113 host1x_debug_output(o, "waitbase id %u val %d\n", i,
114 base_val);
115 }
116
117 pm_runtime_put(m->dev);
118
119 host1x_debug_output(o, "\n");
120}
121
122static void show_all(struct host1x *m, struct output *o, bool show_fifo)
123{
124 unsigned int i;
125
126 host1x_hw_show_mlocks(m, o);
127 show_syncpts(m, o);
128 host1x_debug_output(o, "---- channels ----\n");
129
130 for (i = 0; i < m->info->nb_channels; ++i) {
131 struct host1x_channel *ch = host1x_channel_get_index(m, i);
132
133 if (ch) {
134 show_channel(ch, o, show_fifo);
135 host1x_channel_put(ch);
136 }
137 }
138}
139
140static int host1x_debug_show_all(struct seq_file *s, void *unused)
141{
142 struct output o = {
143 .fn = write_to_seqfile,
144 .ctx = s
145 };
146
147 show_all(s->private, &o, true);
148
149 return 0;
150}
151
152static int host1x_debug_show(struct seq_file *s, void *unused)
153{
154 struct output o = {
155 .fn = write_to_seqfile,
156 .ctx = s
157 };
158
159 show_all(s->private, &o, false);
160
161 return 0;
162}
163
164static int host1x_debug_open_all(struct inode *inode, struct file *file)
165{
166 return single_open(file, host1x_debug_show_all, inode->i_private);
167}
168
169static const struct file_operations host1x_debug_all_fops = {
170 .open = host1x_debug_open_all,
171 .read = seq_read,
172 .llseek = seq_lseek,
173 .release = single_release,
174};
175
176static int host1x_debug_open(struct inode *inode, struct file *file)
177{
178 return single_open(file, host1x_debug_show, inode->i_private);
179}
180
181static const struct file_operations host1x_debug_fops = {
182 .open = host1x_debug_open,
183 .read = seq_read,
184 .llseek = seq_lseek,
185 .release = single_release,
186};
187
188static void host1x_debugfs_init(struct host1x *host1x)
189{
190 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
191
192
193 host1x->debugfs = de;
194
195 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
196 debugfs_create_file("status_all", S_IRUGO, de, host1x,
197 &host1x_debug_all_fops);
198
199 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
200 &host1x_debug_trace_cmdbuf);
201
202 host1x_hw_debug_init(host1x, de);
203
204 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
205 &host1x_debug_force_timeout_pid);
206 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
207 &host1x_debug_force_timeout_val);
208 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
209 &host1x_debug_force_timeout_channel);
210}
211
212static void host1x_debugfs_exit(struct host1x *host1x)
213{
214 debugfs_remove_recursive(host1x->debugfs);
215}
216
217void host1x_debug_init(struct host1x *host1x)
218{
219 if (IS_ENABLED(CONFIG_DEBUG_FS))
220 host1x_debugfs_init(host1x);
221}
222
223void host1x_debug_deinit(struct host1x *host1x)
224{
225 if (IS_ENABLED(CONFIG_DEBUG_FS))
226 host1x_debugfs_exit(host1x);
227}
228
229void host1x_debug_dump(struct host1x *host1x)
230{
231 struct output o = {
232 .fn = write_to_printk
233 };
234
235 show_all(host1x, &o, true);
236}
237
238void host1x_debug_dump_syncpts(struct host1x *host1x)
239{
240 struct output o = {
241 .fn = write_to_printk
242 };
243
244 show_syncpts(host1x, &o);
245}
246
