// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2010 Google, Inc. * Author: Erik Gilling <konkers@android.com> * * Copyright (C) 2011-2013 NVIDIA Corporation */ #include <linux/debugfs.h>#include <linux/pm_runtime.h>#include <linux/seq_file.h>#include <linux/uaccess.h> #include <linux/io.h> #include "dev.h"#include "debug.h"#include "channel.h" static DEFINE_MUTEX(debug_lock); unsigned int host1x_debug_trace_cmdbuf; static pid_t host1x_debug_force_timeout_pid;static u32 host1x_debug_force_timeout_val;static u32 host1x_debug_force_timeout_channel; void host1x_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, false);} void host1x_debug_cont(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, true);} static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo){	struct host1x *m = dev_get_drvdata(ch->dev->parent);	struct output *o = data;	int err; 	err = pm_runtime_resume_and_get(m->dev);	if (err < 0)		return err; 	mutex_lock(&ch->cdma.lock);	mutex_lock(&debug_lock); 	if (show_fifo)		host1x_hw_show_channel_fifo(m, ch, o); 	host1x_hw_show_channel_cdma(m, ch, o); 	mutex_unlock(&debug_lock);	mutex_unlock(&ch->cdma.lock); 	pm_runtime_put(m->dev); 	return 0;} static void show_syncpts(struct host1x *m, struct output *o, bool show_all){	unsigned long irqflags;	struct list_head *pos;	unsigned int i;	int err; 	host1x_debug_output(o, "---- syncpts ----\n"); 	err = pm_runtime_resume_and_get(m->dev);	if (err < 0)		return; 	for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {		u32 max = host1x_syncpt_read_max(m->syncpt + i);		u32 min = host1x_syncpt_load(m->syncpt + i);		unsigned int waiters = 0; 		spin_lock_irqsave(&m->syncpt[i].fences.lock, irqflags);		list_for_each(pos, &m->syncpt[i].fences.list)			waiters++;		spin_unlock_irqrestore(&m->syncpt[i].fences.lock, irqflags); 		if (!kref_read(&m->syncpt[i].ref))			continue; 		if (!show_all && !min && !max && !waiters)			continue; 		host1x_debug_output(o,				    "id %u (%s) min %d max %d (%d waiters)\n",				    i, m->syncpt[i].name, min, max, waiters);	} 	for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {		u32 base_val; 		base_val = host1x_syncpt_load_wait_base(m->syncpt + i);		if (base_val)			host1x_debug_output(o, "waitbase id %u val %d\n", i,					    base_val);	} 	pm_runtime_put(m->dev); 	host1x_debug_output(o, "\n");} static void show_all(struct host1x *m, struct output *o, bool show_fifo){	unsigned int i; 	host1x_hw_show_mlocks(m, o);	show_syncpts(m, o, true);	host1x_debug_output(o, "---- channels ----\n"); 	for (i = 0; i < m->info->nb_channels; ++i) {		struct host1x_channel *ch = host1x_channel_get_index(m, i); 		if (ch) {			show_channel(ch, o, show_fifo);			host1x_channel_put(ch);		}	}} static int host1x_debug_all_show(struct seq_file *s, void *unused){	struct output o = {		.fn = write_to_seqfile,		.ctx = s	}; 	show_all(s->private, &o, true); 	return 0;}DEFINE_SHOW_ATTRIBUTE(host1x_debug_all); static int host1x_debug_show(struct seq_file *s, void *unused){	struct output o = {		.fn = write_to_seqfile,		.ctx = s	}; 	show_all(s->private, &o, false); 	return 0;}DEFINE_SHOW_ATTRIBUTE(host1x_debug); static void host1x_debugfs_init(struct host1x *host1x){	struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 	/* Store the created entry */	host1x->debugfs = de; 	debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);	debugfs_create_file("status_all", S_IRUGO, de, host1x,			    &host1x_debug_all_fops); 	debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,			   &host1x_debug_trace_cmdbuf); 	host1x_hw_debug_init(host1x, de); 	debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,			   &host1x_debug_force_timeout_pid);	debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,			   &host1x_debug_force_timeout_val);	debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,			   &host1x_debug_force_timeout_channel);} static void host1x_debugfs_exit(struct host1x *host1x){	debugfs_remove_recursive(host1x->debugfs);} void host1x_debug_init(struct host1x *host1x){	if (IS_ENABLED(CONFIG_DEBUG_FS))		host1x_debugfs_init(host1x);} void host1x_debug_deinit(struct host1x *host1x){	if (IS_ENABLED(CONFIG_DEBUG_FS))		host1x_debugfs_exit(host1x);} void host1x_debug_dump(struct host1x *host1x){	struct output o = {		.fn = write_to_printk	}; 	show_all(host1x, &o, true);} void host1x_debug_dump_syncpts(struct host1x *host1x){	struct output o = {		.fn = write_to_printk	}; 	show_syncpts(host1x, &o, false);}