]> Git Repo - linux.git/blob - drivers/gpu/host1x/debug.c
gpu: host1x: Fix a couple of checkpatch warnings
[linux.git] / drivers / gpu / host1x / debug.c
1 /*
2  * Copyright (C) 2010 Google, Inc.
3  * Author: Erik Gilling <[email protected]>
4  *
5  * Copyright (C) 2011-2013 NVIDIA Corporation
6  *
7  * This software is licensed under the terms of the GNU General Public
8  * License version 2, as published by the Free Software Foundation, and
9  * may be copied, distributed, and modified under those terms.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  */
17
18 #include <linux/debugfs.h>
19 #include <linux/seq_file.h>
20 #include <linux/uaccess.h>
21
22 #include <linux/io.h>
23
24 #include "dev.h"
25 #include "debug.h"
26 #include "channel.h"
27
28 unsigned int host1x_debug_trace_cmdbuf;
29
30 static pid_t host1x_debug_force_timeout_pid;
31 static u32 host1x_debug_force_timeout_val;
32 static u32 host1x_debug_force_timeout_channel;
33
34 void host1x_debug_output(struct output *o, const char *fmt, ...)
35 {
36         va_list args;
37         int len;
38
39         va_start(args, fmt);
40         len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
41         va_end(args);
42         o->fn(o->ctx, o->buf, len);
43 }
44
45 static int show_channels(struct host1x_channel *ch, void *data, bool show_fifo)
46 {
47         struct host1x *m = dev_get_drvdata(ch->dev->parent);
48         struct output *o = data;
49
50         mutex_lock(&ch->reflock);
51         if (ch->refcount) {
52                 mutex_lock(&ch->cdma.lock);
53                 if (show_fifo)
54                         host1x_hw_show_channel_fifo(m, ch, o);
55                 host1x_hw_show_channel_cdma(m, ch, o);
56                 mutex_unlock(&ch->cdma.lock);
57         }
58         mutex_unlock(&ch->reflock);
59
60         return 0;
61 }
62
63 static void show_syncpts(struct host1x *m, struct output *o)
64 {
65         unsigned int i;
66
67         host1x_debug_output(o, "---- syncpts ----\n");
68         for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
69                 u32 max = host1x_syncpt_read_max(m->syncpt + i);
70                 u32 min = host1x_syncpt_load(m->syncpt + i);
71
72                 if (!min && !max)
73                         continue;
74
75                 host1x_debug_output(o, "id %u (%s) min %d max %d\n",
76                                     i, m->syncpt[i].name, min, max);
77         }
78
79         for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
80                 u32 base_val;
81
82                 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
83                 if (base_val)
84                         host1x_debug_output(o, "waitbase id %u val %d\n", i,
85                                             base_val);
86         }
87
88         host1x_debug_output(o, "\n");
89 }
90
91 static void show_all(struct host1x *m, struct output *o)
92 {
93         struct host1x_channel *ch;
94
95         host1x_hw_show_mlocks(m, o);
96         show_syncpts(m, o);
97         host1x_debug_output(o, "---- channels ----\n");
98
99         host1x_for_each_channel(m, ch)
100                 show_channels(ch, o, true);
101 }
102
103 static void show_all_no_fifo(struct host1x *host1x, struct output *o)
104 {
105         struct host1x_channel *ch;
106
107         host1x_hw_show_mlocks(host1x, o);
108         show_syncpts(host1x, o);
109         host1x_debug_output(o, "---- channels ----\n");
110
111         host1x_for_each_channel(host1x, ch)
112                 show_channels(ch, o, false);
113 }
114
115 static int host1x_debug_show_all(struct seq_file *s, void *unused)
116 {
117         struct output o = {
118                 .fn = write_to_seqfile,
119                 .ctx = s
120         };
121         show_all(s->private, &o);
122         return 0;
123 }
124
125 static int host1x_debug_show(struct seq_file *s, void *unused)
126 {
127         struct output o = {
128                 .fn = write_to_seqfile,
129                 .ctx = s
130         };
131         show_all_no_fifo(s->private, &o);
132         return 0;
133 }
134
135 static int host1x_debug_open_all(struct inode *inode, struct file *file)
136 {
137         return single_open(file, host1x_debug_show_all, inode->i_private);
138 }
139
140 static const struct file_operations host1x_debug_all_fops = {
141         .open           = host1x_debug_open_all,
142         .read           = seq_read,
143         .llseek         = seq_lseek,
144         .release        = single_release,
145 };
146
147 static int host1x_debug_open(struct inode *inode, struct file *file)
148 {
149         return single_open(file, host1x_debug_show, inode->i_private);
150 }
151
152 static const struct file_operations host1x_debug_fops = {
153         .open           = host1x_debug_open,
154         .read           = seq_read,
155         .llseek         = seq_lseek,
156         .release        = single_release,
157 };
158
159 static void host1x_debugfs_init(struct host1x *host1x)
160 {
161         struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
162
163         if (!de)
164                 return;
165
166         /* Store the created entry */
167         host1x->debugfs = de;
168
169         debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
170         debugfs_create_file("status_all", S_IRUGO, de, host1x,
171                             &host1x_debug_all_fops);
172
173         debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
174                            &host1x_debug_trace_cmdbuf);
175
176         host1x_hw_debug_init(host1x, de);
177
178         debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
179                            &host1x_debug_force_timeout_pid);
180         debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
181                            &host1x_debug_force_timeout_val);
182         debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
183                            &host1x_debug_force_timeout_channel);
184 }
185
186 static void host1x_debugfs_exit(struct host1x *host1x)
187 {
188         debugfs_remove_recursive(host1x->debugfs);
189 }
190
191 void host1x_debug_init(struct host1x *host1x)
192 {
193         if (IS_ENABLED(CONFIG_DEBUG_FS))
194                 host1x_debugfs_init(host1x);
195 }
196
197 void host1x_debug_deinit(struct host1x *host1x)
198 {
199         if (IS_ENABLED(CONFIG_DEBUG_FS))
200                 host1x_debugfs_exit(host1x);
201 }
202
203 void host1x_debug_dump(struct host1x *host1x)
204 {
205         struct output o = {
206                 .fn = write_to_printk
207         };
208         show_all(host1x, &o);
209 }
210
211 void host1x_debug_dump_syncpts(struct host1x *host1x)
212 {
213         struct output o = {
214                 .fn = write_to_printk
215         };
216         show_syncpts(host1x, &o);
217 }
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