]> Git Repo - linux.git/blob - drivers/gpu/host1x/debug.c
Merge branch 'akpm' (patches from Andrew)
[linux.git] / drivers / gpu / host1x / debug.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2010 Google, Inc.
4  * Author: Erik Gilling <[email protected]>
5  *
6  * Copyright (C) 2011-2013 NVIDIA Corporation
7  */
8
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
20 static DEFINE_MUTEX(debug_lock);
21
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);
36
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);
50 }
51
52 static 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
78 static 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
122 static 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
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         };
146
147         show_all(s->private, &o, true);
148
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         };
158
159         show_all(s->private, &o, false);
160
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 = {
170         .open = host1x_debug_open_all,
171         .read = seq_read,
172         .llseek = seq_lseek,
173         .release = single_release,
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 = {
182         .open = host1x_debug_open,
183         .read = seq_read,
184         .llseek = seq_lseek,
185         .release = single_release,
186 };
187
188 static void host1x_debugfs_init(struct host1x *host1x)
189 {
190         struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
191
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
212 static void host1x_debugfs_exit(struct host1x *host1x)
213 {
214         debugfs_remove_recursive(host1x->debugfs);
215 }
216
217 void host1x_debug_init(struct host1x *host1x)
218 {
219         if (IS_ENABLED(CONFIG_DEBUG_FS))
220                 host1x_debugfs_init(host1x);
221 }
222
223 void host1x_debug_deinit(struct host1x *host1x)
224 {
225         if (IS_ENABLED(CONFIG_DEBUG_FS))
226                 host1x_debugfs_exit(host1x);
227 }
228
229 void 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
238 void 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 }
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