/*
* drivers/video/tegra/host/debug.c
*
* Copyright (C) 2010 Google, Inc.
* Author: Erik Gilling <konkers@android.com>
*
* Copyright (C) 2011 NVIDIA Corporation
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/io.h>
#include "dev.h"
#include "debug.h"
pid_t nvhost_debug_null_kickoff_pid;
unsigned int nvhost_debug_trace_cmdbuf;
pid_t nvhost_debug_force_timeout_pid;
u32 nvhost_debug_force_timeout_val;
u32 nvhost_debug_force_timeout_channel;
void nvhost_debug_output(struct output *o, const char* fmt, ...)
{
va_list args;
int len;
va_start(args, fmt);
len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
va_end(args);
o->fn(o->ctx, o->buf, len);
}
static int show_channels(struct device *dev, void *data)
{
struct nvhost_channel *ch;
struct nvhost_device *nvdev = to_nvhost_device(dev);
struct output *o = data;
struct nvhost_master *m;
if (nvdev == NULL)
return 0;
m = nvhost_get_host(nvdev);
ch = nvdev->channel;
if (ch) {
mutex_lock(&ch->reflock);
if (ch->refcount) {
mutex_lock(&ch->cdma.lock);
m->op.debug.show_channel_fifo(m, ch, o, nvdev->index);
m->op.debug.show_channel_cdma(m, ch, o, nvdev->index);
mutex_unlock(&ch->cdma.lock);
}
mutex_unlock(&ch->reflock);
}
return 0;
}
static void show_syncpts(struct nvhost_master *m, struct output *o)
{
int i;
BUG_ON(!m->op.syncpt.name);
nvhost_debug_output(o, "---- syncpts ----\n");
for (i = 0; i < m->syncpt.nb_pts; i++) {
u32 max = nvhost_syncpt_read_max(&m->syncpt, i);
u32 min = nvhost_syncpt_update_min(&m->syncpt, i);
if (!min && !max)
continue;
nvhost_debug_output(o, "id %d (%s) min %d max %d\n",
i, m->op.syncpt.name(&m->syncpt, i),
min, max);
}
for (i = 0; i < m->syncpt.nb_bases; i++) {
u32 base_val;
base_val = nvhost_syncpt_read_wait_base(&m->syncpt, i);
if (base_val)
nvhost_debug_output(o, "waitbase id %d val %d\n",
i, base_val);
}
nvhost_debug_output(o, "\n");
}
static void show_all(struct nvhost_master *m, struct output *o)
{
nvhost_module_busy(m->dev);
m->op.debug.show_mlocks(m, o);
show_syncpts(m, o);
nvhost_debug_output(o, "---- channels ----\n");
bus_for_each_dev(&nvhost_bus_type, NULL, o, show_channels);
nvhost_module_idle(m->dev);
}
#ifdef CONFIG_DEBUG_FS
static int nvhost_debug_show(struct seq_file *s, void *unused)
{
struct output o = {
.fn = write_to_seqfile,
.ctx = s
};
show_all(s->private, &o);
return 0;
}
static int nvhost_debug_open(struct inode *inode, struct file *file)
{
return single_open(file, nvhost_debug_show, inode->i_private);
}
static const struct file_operations nvhost_debug_fops = {
.open = nvhost_debug_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void nvhost_debug_init(struct nvhost_master *master)
{
struct dentry *de = debugfs_create_dir("tegra_host", NULL);
debugfs_create_file("status", S_IRUGO, de,
master, &nvhost_debug_fops);
debugfs_create_u32("null_kickoff_pid", S_IRUGO|S_IWUSR, de,
&nvhost_debug_null_kickoff_pid);
debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
&nvhost_debug_trace_cmdbuf);
if (master->op.debug.debug_init)
master->op.debug.debug_init(de);
debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
&nvhost_debug_force_timeout_pid);
debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
&nvhost_debug_force_timeout_val);
debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
&nvhost_debug_force_timeout_channel);
}
#else
void nvhost_debug_init(struct nvhost_master *master)
{
}
#endif
void nvhost_debug_dump(struct nvhost_master *master)
{
struct output o = {
.fn = write_to_printk
};
show_all(master, &o);
}
