1/*
  2 * Copyright (C) 2010 Google, Inc.
  3 * Author: Erik Gilling <konkers@android.com>
  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
 28unsigned int host1x_debug_trace_cmdbuf;
 29
 30static pid_t host1x_debug_force_timeout_pid;
 31static u32 host1x_debug_force_timeout_val;
 32static u32 host1x_debug_force_timeout_channel;
 33
 34void 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
 43	o->fn(o->ctx, o->buf, len, false);
 44}
 45
 46void host1x_debug_cont(struct output *o, const char *fmt, ...)
 47{
 48	va_list args;
 49	int len;
 50
 51	va_start(args, fmt);
 52	len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
 53	va_end(args);
 54
 55	o->fn(o->ctx, o->buf, len, true);
 56}
 57
 58static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
 59{
 60	struct host1x *m = dev_get_drvdata(ch->dev->parent);
 61	struct output *o = data;
 62
 63	mutex_lock(&ch->cdma.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(&ch->cdma.lock);
 71
 72	return 0;
 73}
 74
 75static void show_syncpts(struct host1x *m, struct output *o)
 76{
 77	unsigned int i;
 78
 79	host1x_debug_output(o, "---- syncpts ----\n");
 80
 81	for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
 82		u32 max = host1x_syncpt_read_max(m->syncpt + i);
 83		u32 min = host1x_syncpt_load(m->syncpt + i);
 84
 85		if (!min && !max)
 86			continue;
 87
 88		host1x_debug_output(o, "id %u (%s) min %d max %d\n",
 89				    i, m->syncpt[i].name, min, max);
 90	}
 91
 92	for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
 93		u32 base_val;
 94
 95		base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
 96		if (base_val)
 97			host1x_debug_output(o, "waitbase id %u val %d\n", i,
 98					    base_val);
 99	}
100
101	host1x_debug_output(o, "\n");
102}
103
104static void show_all(struct host1x *m, struct output *o, bool show_fifo)
105{
106	int i;
107
108	host1x_hw_show_mlocks(m, o);
109	show_syncpts(m, o);
110	host1x_debug_output(o, "---- channels ----\n");
111
112	for (i = 0; i < m->info->nb_channels; ++i) {
113		struct host1x_channel *ch = host1x_channel_get_index(m, i);
114
115		if (ch) {
116			show_channel(ch, o, show_fifo);
117			host1x_channel_put(ch);
118		}
119	}
120}
121
122static int host1x_debug_show_all(struct seq_file *s, void *unused)
123{
124	struct output o = {
125		.fn = write_to_seqfile,
126		.ctx = s
127	};
128
129	show_all(s->private, &o, true);
130
131	return 0;
132}
133
134static int host1x_debug_show(struct seq_file *s, void *unused)
135{
136	struct output o = {
137		.fn = write_to_seqfile,
138		.ctx = s
139	};
140
141	show_all(s->private, &o, false);
142
143	return 0;
144}
145
146static int host1x_debug_open_all(struct inode *inode, struct file *file)
147{
148	return single_open(file, host1x_debug_show_all, inode->i_private);
149}
150
151static const struct file_operations host1x_debug_all_fops = {
152	.open = host1x_debug_open_all,
153	.read = seq_read,
154	.llseek = seq_lseek,
155	.release = single_release,
156};
157
158static int host1x_debug_open(struct inode *inode, struct file *file)
159{
160	return single_open(file, host1x_debug_show, inode->i_private);
161}
162
163static const struct file_operations host1x_debug_fops = {
164	.open = host1x_debug_open,
165	.read = seq_read,
166	.llseek = seq_lseek,
167	.release = single_release,
168};
169
170static void host1x_debugfs_init(struct host1x *host1x)
171{
172	struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
173
174	if (!de)
175		return;
176
177	/* Store the created entry */
178	host1x->debugfs = de;
179
180	debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
181	debugfs_create_file("status_all", S_IRUGO, de, host1x,
182			    &host1x_debug_all_fops);
183
184	debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
185			   &host1x_debug_trace_cmdbuf);
186
187	host1x_hw_debug_init(host1x, de);
188
189	debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
190			   &host1x_debug_force_timeout_pid);
191	debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
192			   &host1x_debug_force_timeout_val);
193	debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
194			   &host1x_debug_force_timeout_channel);
195}
196
197static void host1x_debugfs_exit(struct host1x *host1x)
198{
199	debugfs_remove_recursive(host1x->debugfs);
200}
201
202void host1x_debug_init(struct host1x *host1x)
203{
204	if (IS_ENABLED(CONFIG_DEBUG_FS))
205		host1x_debugfs_init(host1x);
206}
207
208void host1x_debug_deinit(struct host1x *host1x)
209{
210	if (IS_ENABLED(CONFIG_DEBUG_FS))
211		host1x_debugfs_exit(host1x);
212}
213
214void host1x_debug_dump(struct host1x *host1x)
215{
216	struct output o = {
217		.fn = write_to_printk
218	};
219
220	show_all(host1x, &o, true);
221}
222
223void host1x_debug_dump_syncpts(struct host1x *host1x)
224{
225	struct output o = {
226		.fn = write_to_printk
227	};
228
229	show_syncpts(host1x, &o);
230}