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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 | ||
78 | static void show_syncpts(struct host1x *m, struct output *o) | |
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 | ||
100 | if (!min && !max && !waiters) | |
6236451d | 101 | continue; |
14c95fc8 | 102 | |
49a5fb16 MP |
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); | |
6236451d TB |
106 | } |
107 | ||
108 | for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { | |
109 | u32 base_val; | |
6df633d0 | 110 | |
6236451d TB |
111 | base_val = host1x_syncpt_load_wait_base(m->syncpt + i); |
112 | if (base_val) | |
14c95fc8 | 113 | host1x_debug_output(o, "waitbase id %u val %d\n", i, |
6236451d TB |
114 | base_val); |
115 | } | |
116 | ||
6b6776e2 DO |
117 | pm_runtime_put(m->dev); |
118 | ||
6236451d TB |
119 | host1x_debug_output(o, "\n"); |
120 | } | |
121 | ||
8474b025 | 122 | static void show_all(struct host1x *m, struct output *o, bool show_fifo) |
6236451d | 123 | { |
d4ad3ad9 | 124 | unsigned int i; |
6236451d TB |
125 | |
126 | host1x_hw_show_mlocks(m, o); | |
127 | show_syncpts(m, o); | |
128 | host1x_debug_output(o, "---- channels ----\n"); | |
129 | ||
8474b025 MP |
130 | for (i = 0; i < m->info->nb_channels; ++i) { |
131 | struct host1x_channel *ch = host1x_channel_get_index(m, i); | |
6236451d | 132 | |
8474b025 MP |
133 | if (ch) { |
134 | show_channel(ch, o, show_fifo); | |
135 | host1x_channel_put(ch); | |
136 | } | |
137 | } | |
6236451d TB |
138 | } |
139 | ||
140 | static 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 | }; | |
0b8070d1 | 146 | |
8474b025 | 147 | show_all(s->private, &o, true); |
0b8070d1 | 148 | |
6236451d TB |
149 | return 0; |
150 | } | |
151 | ||
152 | static int host1x_debug_show(struct seq_file *s, void *unused) | |
153 | { | |
154 | struct output o = { | |
155 | .fn = write_to_seqfile, | |
156 | .ctx = s | |
157 | }; | |
0b8070d1 | 158 | |
8474b025 | 159 | show_all(s->private, &o, false); |
0b8070d1 | 160 | |
6236451d TB |
161 | return 0; |
162 | } | |
163 | ||
164 | static 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 | ||
169 | static const struct file_operations host1x_debug_all_fops = { | |
0b8070d1 TR |
170 | .open = host1x_debug_open_all, |
171 | .read = seq_read, | |
172 | .llseek = seq_lseek, | |
173 | .release = single_release, | |
6236451d TB |
174 | }; |
175 | ||
176 | static int host1x_debug_open(struct inode *inode, struct file *file) | |
177 | { | |
178 | return single_open(file, host1x_debug_show, inode->i_private); | |
179 | } | |
180 | ||
181 | static const struct file_operations host1x_debug_fops = { | |
0b8070d1 TR |
182 | .open = host1x_debug_open, |
183 | .read = seq_read, | |
184 | .llseek = seq_lseek, | |
185 | .release = single_release, | |
6236451d TB |
186 | }; |
187 | ||
8e0d788c | 188 | static void host1x_debugfs_init(struct host1x *host1x) |
6236451d TB |
189 | { |
190 | struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); | |
191 | ||
6236451d TB |
192 | /* Store the created entry */ |
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 | ||
8e0d788c | 212 | static void host1x_debugfs_exit(struct host1x *host1x) |
6236451d TB |
213 | { |
214 | debugfs_remove_recursive(host1x->debugfs); | |
215 | } | |
8e0d788c | 216 | |
6236451d TB |
217 | void host1x_debug_init(struct host1x *host1x) |
218 | { | |
8e0d788c TR |
219 | if (IS_ENABLED(CONFIG_DEBUG_FS)) |
220 | host1x_debugfs_init(host1x); | |
6236451d | 221 | } |
8e0d788c | 222 | |
6236451d TB |
223 | void host1x_debug_deinit(struct host1x *host1x) |
224 | { | |
8e0d788c TR |
225 | if (IS_ENABLED(CONFIG_DEBUG_FS)) |
226 | host1x_debugfs_exit(host1x); | |
6236451d | 227 | } |
6236451d TB |
228 | |
229 | void host1x_debug_dump(struct host1x *host1x) | |
230 | { | |
231 | struct output o = { | |
232 | .fn = write_to_printk | |
233 | }; | |
0b8070d1 | 234 | |
8474b025 | 235 | show_all(host1x, &o, true); |
6236451d TB |
236 | } |
237 | ||
238 | void host1x_debug_dump_syncpts(struct host1x *host1x) | |
239 | { | |
240 | struct output o = { | |
241 | .fn = write_to_printk | |
242 | }; | |
0b8070d1 | 243 | |
6236451d TB |
244 | show_syncpts(host1x, &o); |
245 | } |