1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2010 Google, Inc.
6 * Copyright (C) 2011-2013 NVIDIA Corporation
9 #include <linux/debugfs.h>
10 #include <linux/seq_file.h>
11 #include <linux/uaccess.h>
19 static DEFINE_MUTEX(debug_lock);
21 unsigned int host1x_debug_trace_cmdbuf;
23 static pid_t host1x_debug_force_timeout_pid;
24 static u32 host1x_debug_force_timeout_val;
25 static u32 host1x_debug_force_timeout_channel;
27 void host1x_debug_output(struct output *o, const char *fmt, ...)
33 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
36 o->fn(o->ctx, o->buf, len, false);
39 void host1x_debug_cont(struct output *o, const char *fmt, ...)
45 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
48 o->fn(o->ctx, o->buf, len, true);
51 static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
53 struct host1x *m = dev_get_drvdata(ch->dev->parent);
54 struct output *o = data;
56 mutex_lock(&ch->cdma.lock);
57 mutex_lock(&debug_lock);
60 host1x_hw_show_channel_fifo(m, ch, o);
62 host1x_hw_show_channel_cdma(m, ch, o);
64 mutex_unlock(&debug_lock);
65 mutex_unlock(&ch->cdma.lock);
70 static void show_syncpts(struct host1x *m, struct output *o)
74 host1x_debug_output(o, "---- syncpts ----\n");
76 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
77 u32 max = host1x_syncpt_read_max(m->syncpt + i);
78 u32 min = host1x_syncpt_load(m->syncpt + i);
83 host1x_debug_output(o, "id %u (%s) min %d max %d\n",
84 i, m->syncpt[i].name, min, max);
87 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
90 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
92 host1x_debug_output(o, "waitbase id %u val %d\n", i,
96 host1x_debug_output(o, "\n");
99 static void show_all(struct host1x *m, struct output *o, bool show_fifo)
103 host1x_hw_show_mlocks(m, o);
105 host1x_debug_output(o, "---- channels ----\n");
107 for (i = 0; i < m->info->nb_channels; ++i) {
108 struct host1x_channel *ch = host1x_channel_get_index(m, i);
111 show_channel(ch, o, show_fifo);
112 host1x_channel_put(ch);
117 static int host1x_debug_show_all(struct seq_file *s, void *unused)
120 .fn = write_to_seqfile,
124 show_all(s->private, &o, true);
129 static int host1x_debug_show(struct seq_file *s, void *unused)
132 .fn = write_to_seqfile,
136 show_all(s->private, &o, false);
141 static int host1x_debug_open_all(struct inode *inode, struct file *file)
143 return single_open(file, host1x_debug_show_all, inode->i_private);
146 static const struct file_operations host1x_debug_all_fops = {
147 .open = host1x_debug_open_all,
150 .release = single_release,
153 static int host1x_debug_open(struct inode *inode, struct file *file)
155 return single_open(file, host1x_debug_show, inode->i_private);
158 static const struct file_operations host1x_debug_fops = {
159 .open = host1x_debug_open,
162 .release = single_release,
165 static void host1x_debugfs_init(struct host1x *host1x)
167 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
169 /* Store the created entry */
170 host1x->debugfs = de;
172 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
173 debugfs_create_file("status_all", S_IRUGO, de, host1x,
174 &host1x_debug_all_fops);
176 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
177 &host1x_debug_trace_cmdbuf);
179 host1x_hw_debug_init(host1x, de);
181 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
182 &host1x_debug_force_timeout_pid);
183 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
184 &host1x_debug_force_timeout_val);
185 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
186 &host1x_debug_force_timeout_channel);
189 static void host1x_debugfs_exit(struct host1x *host1x)
191 debugfs_remove_recursive(host1x->debugfs);
194 void host1x_debug_init(struct host1x *host1x)
196 if (IS_ENABLED(CONFIG_DEBUG_FS))
197 host1x_debugfs_init(host1x);
200 void host1x_debug_deinit(struct host1x *host1x)
202 if (IS_ENABLED(CONFIG_DEBUG_FS))
203 host1x_debugfs_exit(host1x);
206 void host1x_debug_dump(struct host1x *host1x)
209 .fn = write_to_printk
212 show_all(host1x, &o, true);
215 void host1x_debug_dump_syncpts(struct host1x *host1x)
218 .fn = write_to_printk
221 show_syncpts(host1x, &o);