350 lines
8.5 KiB
C
350 lines
8.5 KiB
C
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/*
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* drivers/video/tegra/host/debug.c
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*
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* Copyright (C) 2010 Google, Inc.
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* Author: Erik Gilling <konkers@android.com>
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*
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* Copyright (C) 2011-2018, NVIDIA Corporation. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <linux/nvhost.h>
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#include <linux/io.h>
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#include "dev.h"
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#include "debug.h"
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#include "nvhost_acm.h"
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#include "nvhost_channel.h"
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#include "chip_support.h"
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unsigned int nvhost_debug_trace_cmdbuf;
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unsigned int nvhost_debug_trace_actmon;
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u32 nvhost_debug_force_timeout_dump;
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void nvhost_debug_output(struct output *o, const char* fmt, ...)
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{
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va_list args;
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int len;
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va_start(args, fmt);
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len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
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va_end(args);
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o->fn(o->ctx, o->buf, len);
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}
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static void show_syncpts(struct nvhost_master *m, struct output *o)
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{
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int i;
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nvhost_debug_output(o, "---- syncpts ----\n");
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mutex_lock(&m->syncpt.syncpt_mutex);
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for (i = nvhost_syncpt_pts_base(&m->syncpt);
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i < nvhost_syncpt_pts_limit(&m->syncpt); i++) {
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u32 max = nvhost_syncpt_read_max(&m->syncpt, i);
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u32 min = nvhost_syncpt_update_min(&m->syncpt, i);
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u32 refs = nvhost_syncpt_read_ref(&m->syncpt, i);
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if ((!min && !max) || (refs == 0 && min == max))
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continue;
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nvhost_debug_output(o,
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"id %d (%s) min %d max %d refs %d (previous client : %s)\n",
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i, nvhost_get_chip_ops()->syncpt.name(&m->syncpt, i),
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min, max, refs,
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nvhost_syncpt_get_last_client(m->dev, i));
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}
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mutex_unlock(&m->syncpt.syncpt_mutex);
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nvhost_debug_output(o, "\n");
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}
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void nvhost_syncpt_debug(struct nvhost_syncpt *sp)
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{
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struct output o = {
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.fn = write_to_printk,
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};
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show_syncpts(syncpt_to_dev(sp), &o);
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}
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#ifdef CONFIG_DEBUG_FS
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static int show_channels(struct platform_device *pdev, void *data,
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int locked_id, bool fifo)
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{
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struct nvhost_channel *ch;
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struct output *o = data;
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struct nvhost_master *m;
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int index, locked;
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if (pdev == NULL)
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return 0;
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m = nvhost_get_host(pdev);
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/* acquire lock to prevent channel modifications */
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locked = mutex_trylock(&m->chlist_mutex);
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if (!locked) {
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nvhost_debug_output(o, "unable to lock channel list\n");
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return 0;
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}
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for (index = 0; index < nvhost_channel_nb_channels(m); index++) {
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ch = m->chlist[index];
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if (!ch || ch->dev != pdev)
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continue;
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/* ensure that we get a lock */
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locked = down_write_trylock(&ch->cdma.lock);
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if (!(locked || ch->chid == locked_id)) {
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nvhost_debug_output(o, "failed to lock channel %d cdma\n",
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ch->chid);
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continue;
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}
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nvhost_debug_output(o, "\nchannel %d - %s\n\n", ch->chid,
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pdev->name);
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if (fifo)
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nvhost_get_chip_ops()->debug.show_channel_fifo(
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m, ch, o, ch->chid);
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nvhost_get_chip_ops()->debug.show_channel_cdma(
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m, ch, o, ch->chid);
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if (ch->chid != locked_id)
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up_write(&ch->cdma.lock);
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}
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mutex_unlock(&m->chlist_mutex);
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return 0;
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}
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static int show_channels_fifo(struct platform_device *pdev, void *data,
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int locked_id)
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{
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return show_channels(pdev, data, locked_id, true);
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}
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static int show_channels_no_fifo(struct platform_device *pdev, void *data,
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int locked_id)
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{
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return show_channels(pdev, data, locked_id, false);
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}
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static void show_all(struct nvhost_master *m, struct output *o,
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int locked_id)
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{
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if (nvhost_module_busy(m->dev))
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return;
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nvhost_get_chip_ops()->debug.show_mlocks(m, o);
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show_syncpts(m, o);
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nvhost_debug_output(o, "---- channels ----\n");
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nvhost_device_list_for_all(o, show_channels_fifo, locked_id);
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intr_op().debug_dump(&m->intr, o);
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nvhost_module_idle(m->dev);
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}
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static void show_all_no_fifo(struct nvhost_master *m, struct output *o,
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int locked_id)
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{
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if (nvhost_module_busy(m->dev))
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return;
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nvhost_get_chip_ops()->debug.show_mlocks(m, o);
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show_syncpts(m, o);
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nvhost_debug_output(o, "---- channels ----\n");
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nvhost_device_list_for_all(o, show_channels_no_fifo, locked_id);
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intr_op().debug_dump(&m->intr, o);
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nvhost_module_idle(m->dev);
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}
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static int nvhost_debug_show_all(struct seq_file *s, void *unused)
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{
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struct output o = {
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.fn = write_to_seqfile,
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.ctx = s
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};
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show_all(s->private, &o, -1);
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return 0;
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}
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static int nvhost_debug_show(struct seq_file *s, void *unused)
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{
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struct output o = {
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.fn = write_to_seqfile,
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.ctx = s
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};
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show_all_no_fifo(s->private, &o, -1);
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return 0;
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}
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static int nvhost_debug_open_all(struct inode *inode, struct file *file)
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{
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return single_open(file, nvhost_debug_show_all, inode->i_private);
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}
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static const struct file_operations nvhost_debug_all_fops = {
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.open = nvhost_debug_open_all,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int nvhost_debug_open(struct inode *inode, struct file *file)
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{
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return single_open(file, nvhost_debug_show, inode->i_private);
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}
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static const struct file_operations nvhost_debug_fops = {
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.open = nvhost_debug_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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void nvhost_device_debug_init(struct platform_device *dev)
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{
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struct nvhost_device_data *pdata = platform_get_drvdata(dev);
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const char *debugfs_name;
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debugfs_name = pdata->devfs_name ? pdata->devfs_name : dev->name;
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pdata->debugfs = debugfs_create_dir(debugfs_name, pdata->debugfs);
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}
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void nvhost_device_debug_deinit(struct platform_device *dev)
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{
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struct nvhost_device_data *pdata = platform_get_drvdata(dev);
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if (!IS_ERR_OR_NULL(pdata->debugfs))
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debugfs_remove(pdata->debugfs);
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pdata->debugfs = NULL;
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}
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void nvhost_debug_init(struct nvhost_master *master)
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{
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struct nvhost_device_data *pdata;
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struct dentry *de = debugfs_create_dir("tegra_host", NULL);
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if (!de)
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return;
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pdata = platform_get_drvdata(master->dev);
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/* Store the created entry */
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pdata->debugfs = de;
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debugfs_create_file("status", S_IRUGO, de,
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master, &nvhost_debug_fops);
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debugfs_create_file("status_all", S_IRUGO, de,
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master, &nvhost_debug_all_fops);
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debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
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&nvhost_debug_trace_cmdbuf);
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if (nvhost_get_chip_ops()->debug.debug_init)
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nvhost_get_chip_ops()->debug.debug_init(de);
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debugfs_create_u32("force_timeout_dump", S_IRUGO|S_IWUSR, de,
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&nvhost_debug_force_timeout_dump);
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nvhost_debug_force_timeout_dump = 0;
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#if defined(NVHOST_DEBUG)
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debugfs_create_u32("dbg_mask", S_IRUGO|S_IWUSR, de,
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&nvhost_dbg_mask);
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debugfs_create_u32("dbg_ftrace", S_IRUGO|S_IWUSR, de,
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&nvhost_dbg_ftrace);
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#endif
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debugfs_create_u32("timeout_default_ms", S_IRUGO|S_IWUSR, de,
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&pdata->nvhost_timeout_default);
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debugfs_create_u32("trace_actmon", S_IRUGO|S_IWUSR, de,
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&nvhost_debug_trace_actmon);
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}
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void nvhost_register_dump_device(
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struct platform_device *dev,
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void (*nvgpu_debug_dump_device)(void *),
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void *data)
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{
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struct nvhost_device_data *pdata = platform_get_drvdata(dev);
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if (pdata == NULL) {
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pr_warn("%s: Invalid device\n", __func__);
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return;
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}
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pdata->debug_dump_data = data;
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pdata->debug_dump_device = nvgpu_debug_dump_device;
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}
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EXPORT_SYMBOL(nvhost_register_dump_device);
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void nvhost_unregister_dump_device(struct platform_device *dev)
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{
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struct nvhost_device_data *pdata = platform_get_drvdata(dev);
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if (pdata == NULL) {
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pr_warn("%s: Invalid device\n", __func__);
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return;
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}
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pdata->debug_dump_data = NULL;
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pdata->debug_dump_device = NULL;
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}
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EXPORT_SYMBOL(nvhost_unregister_dump_device);
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void nvhost_debug_dump_locked(struct nvhost_master *master, int locked_id)
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{
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struct nvhost_device_data *pdata = platform_get_drvdata(master->dev);
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struct output o = {
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.fn = write_to_printk
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};
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show_all_no_fifo(master, &o, locked_id);
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if (pdata->debug_dump_device)
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pdata->debug_dump_device(pdata->debug_dump_data);
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}
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void nvhost_debug_dump(struct nvhost_master *master)
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{
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struct nvhost_device_data *pdata = platform_get_drvdata(master->dev);
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struct output o = {
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.fn = write_to_printk
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};
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show_all_no_fifo(master, &o, -1);
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if (pdata->debug_dump_device)
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pdata->debug_dump_device(pdata->debug_dump_data);
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}
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void nvhost_debug_dump_device(struct platform_device *pdev)
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{
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struct nvhost_master *master = nvhost_get_host(pdev);
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struct output o = {
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.fn = write_to_printk
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};
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if (!master)
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return;
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show_all_no_fifo(master, &o, -1);
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}
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EXPORT_SYMBOL(nvhost_debug_dump_device);
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#endif
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