1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2010 Google, Inc.
  4 * Author: Erik Gilling <konkers@android.com>
  5 *
  6 * Copyright (C) 2011-2013 NVIDIA Corporation
  7 */
  8
  9#include <linux/debugfs.h>
 10#include <linux/seq_file.h>
 11#include <linux/uaccess.h>
 12
 13#include <linux/io.h>
 14
 15#include "dev.h"
 16#include "debug.h"
 17#include "channel.h"
 18
 19static DEFINE_MUTEX(debug_lock);
 20
 21unsigned int host1x_debug_trace_cmdbuf;
 22
 23static pid_t host1x_debug_force_timeout_pid;
 24static u32 host1x_debug_force_timeout_val;
 25static u32 host1x_debug_force_timeout_channel;
 26
 27void host1x_debug_output(struct output *o, const char *fmt, ...)
 28{
 29	va_list args;
 30	int len;
 31
 32	va_start(args, fmt);
 33	len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
 34	va_end(args);
 35
 36	o->fn(o->ctx, o->buf, len, false);
 37}
 38
 39void host1x_debug_cont(struct output *o, const char *fmt, ...)
 40{
 41	va_list args;
 42	int len;
 43
 44	va_start(args, fmt);
 45	len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
 46	va_end(args);
 47
 48	o->fn(o->ctx, o->buf, len, true);
 49}
 50
 51static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
 52{
 53	struct host1x *m = dev_get_drvdata(ch->dev->parent);
 54	struct output *o = data;
 55
 56	mutex_lock(&ch->cdma.lock);
 57	mutex_lock(&debug_lock);
 58
 59	if (show_fifo)
 60		host1x_hw_show_channel_fifo(m, ch, o);
 61
 62	host1x_hw_show_channel_cdma(m, ch, o);
 63
 64	mutex_unlock(&debug_lock);
 65	mutex_unlock(&ch->cdma.lock);
 66
 67	return 0;
 68}
 69
 70static void show_syncpts(struct host1x *m, struct output *o)
 71{
 72	unsigned int i;
 73
 74	host1x_debug_output(o, "---- syncpts ----\n");
 75
 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);
 79
 80		if (!min && !max)
 81			continue;
 82
 83		host1x_debug_output(o, "id %u (%s) min %d max %d\n",
 84				    i, m->syncpt[i].name, min, max);
 85	}
 86
 87	for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
 88		u32 base_val;
 89
 90		base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
 91		if (base_val)
 92			host1x_debug_output(o, "waitbase id %u val %d\n", i,
 93					    base_val);
 94	}
 95
 96	host1x_debug_output(o, "\n");
 97}
 98
 99static void show_all(struct host1x *m, struct output *o, bool show_fifo)
100{
101	unsigned int i;
102
103	host1x_hw_show_mlocks(m, o);
104	show_syncpts(m, o);
105	host1x_debug_output(o, "---- channels ----\n");
106
107	for (i = 0; i < m->info->nb_channels; ++i) {
108		struct host1x_channel *ch = host1x_channel_get_index(m, i);
109
110		if (ch) {
111			show_channel(ch, o, show_fifo);
112			host1x_channel_put(ch);
113		}
114	}
115}
116
117static int host1x_debug_show_all(struct seq_file *s, void *unused)
118{
119	struct output o = {
120		.fn = write_to_seqfile,
121		.ctx = s
122	};
123
124	show_all(s->private, &o, true);
125
126	return 0;
127}
128
129static int host1x_debug_show(struct seq_file *s, void *unused)
130{
131	struct output o = {
132		.fn = write_to_seqfile,
133		.ctx = s
134	};
135
136	show_all(s->private, &o, false);
137
138	return 0;
139}
140
141static int host1x_debug_open_all(struct inode *inode, struct file *file)
142{
143	return single_open(file, host1x_debug_show_all, inode->i_private);
144}
145
146static const struct file_operations host1x_debug_all_fops = {
147	.open = host1x_debug_open_all,
148	.read = seq_read,
149	.llseek = seq_lseek,
150	.release = single_release,
151};
152
153static int host1x_debug_open(struct inode *inode, struct file *file)
154{
155	return single_open(file, host1x_debug_show, inode->i_private);
156}
157
158static const struct file_operations host1x_debug_fops = {
159	.open = host1x_debug_open,
160	.read = seq_read,
161	.llseek = seq_lseek,
162	.release = single_release,
163};
164
165static void host1x_debugfs_init(struct host1x *host1x)
166{
167	struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
168
169	/* Store the created entry */
170	host1x->debugfs = de;
171
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);
175
176	debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
177			   &host1x_debug_trace_cmdbuf);
178
179	host1x_hw_debug_init(host1x, de);
180
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);
187}
188
189static void host1x_debugfs_exit(struct host1x *host1x)
190{
191	debugfs_remove_recursive(host1x->debugfs);
192}
193
194void host1x_debug_init(struct host1x *host1x)
195{
196	if (IS_ENABLED(CONFIG_DEBUG_FS))
197		host1x_debugfs_init(host1x);
198}
199
200void host1x_debug_deinit(struct host1x *host1x)
201{
202	if (IS_ENABLED(CONFIG_DEBUG_FS))
203		host1x_debugfs_exit(host1x);
204}
205
206void host1x_debug_dump(struct host1x *host1x)
207{
208	struct output o = {
209		.fn = write_to_printk
210	};
211
212	show_all(host1x, &o, true);
213}
214
215void host1x_debug_dump_syncpts(struct host1x *host1x)
216{
217	struct output o = {
218		.fn = write_to_printk
219	};
220
221	show_syncpts(host1x, &o);
222}