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
 19unsigned int host1x_debug_trace_cmdbuf;
 20
 21static pid_t host1x_debug_force_timeout_pid;
 22static u32 host1x_debug_force_timeout_val;
 23static u32 host1x_debug_force_timeout_channel;
 24
 25void host1x_debug_output(struct output *o, const char *fmt, ...)
 26{
 27	va_list args;
 28	int len;
 29
 30	va_start(args, fmt);
 31	len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
 32	va_end(args);
 33
 34	o->fn(o->ctx, o->buf, len, false);
 35}
 36
 37void host1x_debug_cont(struct output *o, const char *fmt, ...)
 38{
 39	va_list args;
 40	int len;
 41
 42	va_start(args, fmt);
 43	len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
 44	va_end(args);
 45
 46	o->fn(o->ctx, o->buf, len, true);
 47}
 48
 49static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
 50{
 51	struct host1x *m = dev_get_drvdata(ch->dev->parent);
 52	struct output *o = data;
 53
 54	mutex_lock(&ch->cdma.lock);
 55
 56	if (show_fifo)
 57		host1x_hw_show_channel_fifo(m, ch, o);
 58
 59	host1x_hw_show_channel_cdma(m, ch, o);
 60
 61	mutex_unlock(&ch->cdma.lock);
 62
 63	return 0;
 64}
 65
 66static void show_syncpts(struct host1x *m, struct output *o)
 67{
 68	unsigned int i;
 69
 70	host1x_debug_output(o, "---- syncpts ----\n");
 71
 72	for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
 73		u32 max = host1x_syncpt_read_max(m->syncpt + i);
 74		u32 min = host1x_syncpt_load(m->syncpt + i);
 75
 76		if (!min && !max)
 77			continue;
 78
 79		host1x_debug_output(o, "id %u (%s) min %d max %d\n",
 80				    i, m->syncpt[i].name, min, max);
 81	}
 82
 83	for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
 84		u32 base_val;
 85
 86		base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
 87		if (base_val)
 88			host1x_debug_output(o, "waitbase id %u val %d\n", i,
 89					    base_val);
 90	}
 91
 92	host1x_debug_output(o, "\n");
 93}
 94
 95static void show_all(struct host1x *m, struct output *o, bool show_fifo)
 96{
 97	unsigned int i;
 98
 99	host1x_hw_show_mlocks(m, o);
100	show_syncpts(m, o);
101	host1x_debug_output(o, "---- channels ----\n");
102
103	for (i = 0; i < m->info->nb_channels; ++i) {
104		struct host1x_channel *ch = host1x_channel_get_index(m, i);
105
106		if (ch) {
107			show_channel(ch, o, show_fifo);
108			host1x_channel_put(ch);
109		}
110	}
111}
112
113static int host1x_debug_show_all(struct seq_file *s, void *unused)
114{
115	struct output o = {
116		.fn = write_to_seqfile,
117		.ctx = s
118	};
119
120	show_all(s->private, &o, true);
121
122	return 0;
123}
124
125static 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
132	show_all(s->private, &o, false);
133
134	return 0;
135}
136
137static int host1x_debug_open_all(struct inode *inode, struct file *file)
138{
139	return single_open(file, host1x_debug_show_all, inode->i_private);
140}
141
142static const struct file_operations host1x_debug_all_fops = {
143	.open = host1x_debug_open_all,
144	.read = seq_read,
145	.llseek = seq_lseek,
146	.release = single_release,
147};
148
149static int host1x_debug_open(struct inode *inode, struct file *file)
150{
151	return single_open(file, host1x_debug_show, inode->i_private);
152}
153
154static const struct file_operations host1x_debug_fops = {
155	.open = host1x_debug_open,
156	.read = seq_read,
157	.llseek = seq_lseek,
158	.release = single_release,
159};
160
161static void host1x_debugfs_init(struct host1x *host1x)
162{
163	struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
164
165	/* Store the created entry */
166	host1x->debugfs = de;
167
168	debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
169	debugfs_create_file("status_all", S_IRUGO, de, host1x,
170			    &host1x_debug_all_fops);
171
172	debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
173			   &host1x_debug_trace_cmdbuf);
174
175	host1x_hw_debug_init(host1x, de);
176
177	debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
178			   &host1x_debug_force_timeout_pid);
179	debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
180			   &host1x_debug_force_timeout_val);
181	debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
182			   &host1x_debug_force_timeout_channel);
183}
184
185static void host1x_debugfs_exit(struct host1x *host1x)
186{
187	debugfs_remove_recursive(host1x->debugfs);
188}
189
190void host1x_debug_init(struct host1x *host1x)
191{
192	if (IS_ENABLED(CONFIG_DEBUG_FS))
193		host1x_debugfs_init(host1x);
194}
195
196void host1x_debug_deinit(struct host1x *host1x)
197{
198	if (IS_ENABLED(CONFIG_DEBUG_FS))
199		host1x_debugfs_exit(host1x);
200}
201
202void host1x_debug_dump(struct host1x *host1x)
203{
204	struct output o = {
205		.fn = write_to_printk
206	};
207
208	show_all(host1x, &o, true);
209}
210
211void host1x_debug_dump_syncpts(struct host1x *host1x)
212{
213	struct output o = {
214		.fn = write_to_printk
215	};
216
217	show_syncpts(host1x, &o);
218}