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9c92ab61 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6236451d TB |
2 | /* |
3 | * Copyright (C) 2010 Google, Inc. | |
4 | * Author: Erik Gilling <konkers@android.com> | |
5 | * | |
6 | * Copyright (C) 2011-2013 NVIDIA Corporation | |
6236451d TB |
7 | */ |
8 | ||
9 | #include <linux/debugfs.h> | |
6b6776e2 | 10 | #include <linux/pm_runtime.h> |
6236451d TB |
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 | ||
35681862 DO |
20 | static DEFINE_MUTEX(debug_lock); |
21 | ||
6236451d TB |
22 | unsigned int host1x_debug_trace_cmdbuf; |
23 | ||
24 | static pid_t host1x_debug_force_timeout_pid; | |
25 | static u32 host1x_debug_force_timeout_val; | |
26 | static u32 host1x_debug_force_timeout_channel; | |
27 | ||
28 | void 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); | |
0b8070d1 | 36 | |
eb2ee1a2 MP |
37 | o->fn(o->ctx, o->buf, len, false); |
38 | } | |
39 | ||
40 | void 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); | |
6236451d TB |
50 | } |
51 | ||
8474b025 | 52 | static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo) |
6236451d TB |
53 | { |
54 | struct host1x *m = dev_get_drvdata(ch->dev->parent); | |
55 | struct output *o = data; | |
6b6776e2 DO |
56 | int err; |
57 | ||
58 | err = pm_runtime_resume_and_get(m->dev); | |
59 | if (err < 0) | |
60 | return err; | |
6236451d | 61 | |
8474b025 | 62 | mutex_lock(&ch->cdma.lock); |
35681862 | 63 | mutex_lock(&debug_lock); |
0b8070d1 | 64 | |
8474b025 MP |
65 | if (show_fifo) |
66 | host1x_hw_show_channel_fifo(m, ch, o); | |
0b8070d1 | 67 | |
8474b025 | 68 | host1x_hw_show_channel_cdma(m, ch, o); |
0b8070d1 | 69 | |
35681862 | 70 | mutex_unlock(&debug_lock); |
8474b025 | 71 | mutex_unlock(&ch->cdma.lock); |
6236451d | 72 | |
6b6776e2 DO |
73 | pm_runtime_put(m->dev); |
74 | ||
6236451d TB |
75 | return 0; |
76 | } | |
77 | ||
74bb98dd | 78 | static void show_syncpts(struct host1x *m, struct output *o, bool show_all) |
6236451d | 79 | { |
49a5fb16 | 80 | struct list_head *pos; |
14c95fc8 | 81 | unsigned int i; |
6b6776e2 | 82 | int err; |
6df633d0 | 83 | |
6236451d | 84 | host1x_debug_output(o, "---- syncpts ----\n"); |
0b8070d1 | 85 | |
6b6776e2 DO |
86 | err = pm_runtime_resume_and_get(m->dev); |
87 | if (err < 0) | |
88 | return; | |
89 | ||
6236451d TB |
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); | |
49a5fb16 | 93 | unsigned int waiters = 0; |
6df633d0 | 94 | |
49a5fb16 MP |
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 | ||
74bb98dd JH |
100 | if (!kref_read(&m->syncpt[i].ref)) |
101 | continue; | |
102 | ||
103 | if (!show_all && !min && !max && !waiters) | |
6236451d | 104 | continue; |
14c95fc8 | 105 | |
49a5fb16 MP |
106 | host1x_debug_output(o, |
107 | "id %u (%s) min %d max %d (%d waiters)\n", | |
108 | i, m->syncpt[i].name, min, max, waiters); | |
6236451d TB |
109 | } |
110 | ||
111 | for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { | |
112 | u32 base_val; | |
6df633d0 | 113 | |
6236451d TB |
114 | base_val = host1x_syncpt_load_wait_base(m->syncpt + i); |
115 | if (base_val) | |
14c95fc8 | 116 | host1x_debug_output(o, "waitbase id %u val %d\n", i, |
6236451d TB |
117 | base_val); |
118 | } | |
119 | ||
6b6776e2 DO |
120 | pm_runtime_put(m->dev); |
121 | ||
6236451d TB |
122 | host1x_debug_output(o, "\n"); |
123 | } | |
124 | ||
8474b025 | 125 | static void show_all(struct host1x *m, struct output *o, bool show_fifo) |
6236451d | 126 | { |
d4ad3ad9 | 127 | unsigned int i; |
6236451d TB |
128 | |
129 | host1x_hw_show_mlocks(m, o); | |
74bb98dd | 130 | show_syncpts(m, o, true); |
6236451d TB |
131 | host1x_debug_output(o, "---- channels ----\n"); |
132 | ||
8474b025 MP |
133 | for (i = 0; i < m->info->nb_channels; ++i) { |
134 | struct host1x_channel *ch = host1x_channel_get_index(m, i); | |
6236451d | 135 | |
8474b025 MP |
136 | if (ch) { |
137 | show_channel(ch, o, show_fifo); | |
138 | host1x_channel_put(ch); | |
139 | } | |
140 | } | |
6236451d TB |
141 | } |
142 | ||
143 | static int host1x_debug_show_all(struct seq_file *s, void *unused) | |
144 | { | |
145 | struct output o = { | |
146 | .fn = write_to_seqfile, | |
147 | .ctx = s | |
148 | }; | |
0b8070d1 | 149 | |
8474b025 | 150 | show_all(s->private, &o, true); |
0b8070d1 | 151 | |
6236451d TB |
152 | return 0; |
153 | } | |
154 | ||
155 | static int host1x_debug_show(struct seq_file *s, void *unused) | |
156 | { | |
157 | struct output o = { | |
158 | .fn = write_to_seqfile, | |
159 | .ctx = s | |
160 | }; | |
0b8070d1 | 161 | |
8474b025 | 162 | show_all(s->private, &o, false); |
0b8070d1 | 163 | |
6236451d TB |
164 | return 0; |
165 | } | |
166 | ||
167 | static int host1x_debug_open_all(struct inode *inode, struct file *file) | |
168 | { | |
169 | return single_open(file, host1x_debug_show_all, inode->i_private); | |
170 | } | |
171 | ||
172 | static const struct file_operations host1x_debug_all_fops = { | |
0b8070d1 TR |
173 | .open = host1x_debug_open_all, |
174 | .read = seq_read, | |
175 | .llseek = seq_lseek, | |
176 | .release = single_release, | |
6236451d TB |
177 | }; |
178 | ||
179 | static int host1x_debug_open(struct inode *inode, struct file *file) | |
180 | { | |
181 | return single_open(file, host1x_debug_show, inode->i_private); | |
182 | } | |
183 | ||
184 | static const struct file_operations host1x_debug_fops = { | |
0b8070d1 TR |
185 | .open = host1x_debug_open, |
186 | .read = seq_read, | |
187 | .llseek = seq_lseek, | |
188 | .release = single_release, | |
6236451d TB |
189 | }; |
190 | ||
8e0d788c | 191 | static void host1x_debugfs_init(struct host1x *host1x) |
6236451d TB |
192 | { |
193 | struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); | |
194 | ||
6236451d TB |
195 | /* Store the created entry */ |
196 | host1x->debugfs = de; | |
197 | ||
198 | debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops); | |
199 | debugfs_create_file("status_all", S_IRUGO, de, host1x, | |
200 | &host1x_debug_all_fops); | |
201 | ||
202 | debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de, | |
203 | &host1x_debug_trace_cmdbuf); | |
204 | ||
205 | host1x_hw_debug_init(host1x, de); | |
206 | ||
207 | debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de, | |
208 | &host1x_debug_force_timeout_pid); | |
209 | debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de, | |
210 | &host1x_debug_force_timeout_val); | |
211 | debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de, | |
212 | &host1x_debug_force_timeout_channel); | |
213 | } | |
214 | ||
8e0d788c | 215 | static void host1x_debugfs_exit(struct host1x *host1x) |
6236451d TB |
216 | { |
217 | debugfs_remove_recursive(host1x->debugfs); | |
218 | } | |
8e0d788c | 219 | |
6236451d TB |
220 | void host1x_debug_init(struct host1x *host1x) |
221 | { | |
8e0d788c TR |
222 | if (IS_ENABLED(CONFIG_DEBUG_FS)) |
223 | host1x_debugfs_init(host1x); | |
6236451d | 224 | } |
8e0d788c | 225 | |
6236451d TB |
226 | void host1x_debug_deinit(struct host1x *host1x) |
227 | { | |
8e0d788c TR |
228 | if (IS_ENABLED(CONFIG_DEBUG_FS)) |
229 | host1x_debugfs_exit(host1x); | |
6236451d | 230 | } |
6236451d TB |
231 | |
232 | void host1x_debug_dump(struct host1x *host1x) | |
233 | { | |
234 | struct output o = { | |
235 | .fn = write_to_printk | |
236 | }; | |
0b8070d1 | 237 | |
8474b025 | 238 | show_all(host1x, &o, true); |
6236451d TB |
239 | } |
240 | ||
241 | void host1x_debug_dump_syncpts(struct host1x *host1x) | |
242 | { | |
243 | struct output o = { | |
244 | .fn = write_to_printk | |
245 | }; | |
0b8070d1 | 246 | |
74bb98dd | 247 | show_syncpts(host1x, &o, false); |
6236451d | 248 | } |