mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 22:16:40 +07:00
dfe96ddcfa
We don't need to hold onto mode_config.mutex any more to keep the fb objects around. And locking dev->struct_mutex is also not required, since omap_gem_describe only reads data anyway. And for a debug interface it's better to grab fewer locks in case the driver is deadlocked already ... The only thing we need is to hold onto mode_config.fb_lock to ensure the user-created fbs don't disappear. The fbcon fb doesn't need any protection, since it lives as long as the driver (and so the debugfs files) itself. And if the teardown/setup isn't following the right sequence grabbing locks won't prevent a NULL deref on priv->fbdev if the fb is not yet (or no longer) there. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Rob Clark <robdclark@gmail.com>
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
|
|
* drivers/gpu/drm/omapdrm/omap_debugfs.c
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments
|
|
* Author: Rob Clark <rob.clark@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "omap_drv.h"
|
|
#include "omap_dmm_tiler.h"
|
|
|
|
#include "drm_fb_helper.h"
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
static int gem_show(struct seq_file *m, void *arg)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *) m->private;
|
|
struct drm_device *dev = node->minor->dev;
|
|
struct omap_drm_private *priv = dev->dev_private;
|
|
int ret;
|
|
|
|
ret = mutex_lock_interruptible(&dev->struct_mutex);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq_printf(m, "All Objects:\n");
|
|
omap_gem_describe_objects(&priv->obj_list, m);
|
|
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mm_show(struct seq_file *m, void *arg)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *) m->private;
|
|
struct drm_device *dev = node->minor->dev;
|
|
return drm_mm_dump_table(m, dev->mm_private);
|
|
}
|
|
|
|
static int fb_show(struct seq_file *m, void *arg)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *) m->private;
|
|
struct drm_device *dev = node->minor->dev;
|
|
struct omap_drm_private *priv = dev->dev_private;
|
|
struct drm_framebuffer *fb;
|
|
|
|
seq_printf(m, "fbcon ");
|
|
omap_framebuffer_describe(priv->fbdev->fb, m);
|
|
|
|
mutex_lock(&dev->mode_config.fb_lock);
|
|
list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
|
|
if (fb == priv->fbdev->fb)
|
|
continue;
|
|
|
|
seq_printf(m, "user ");
|
|
omap_framebuffer_describe(fb, m);
|
|
}
|
|
mutex_unlock(&dev->mode_config.fb_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* list of debufs files that are applicable to all devices */
|
|
static struct drm_info_list omap_debugfs_list[] = {
|
|
{"gem", gem_show, 0},
|
|
{"mm", mm_show, 0},
|
|
{"fb", fb_show, 0},
|
|
};
|
|
|
|
/* list of debugfs files that are specific to devices with dmm/tiler */
|
|
static struct drm_info_list omap_dmm_debugfs_list[] = {
|
|
{"tiler_map", tiler_map_show, 0},
|
|
};
|
|
|
|
int omap_debugfs_init(struct drm_minor *minor)
|
|
{
|
|
struct drm_device *dev = minor->dev;
|
|
int ret;
|
|
|
|
ret = drm_debugfs_create_files(omap_debugfs_list,
|
|
ARRAY_SIZE(omap_debugfs_list),
|
|
minor->debugfs_root, minor);
|
|
|
|
if (ret) {
|
|
dev_err(dev->dev, "could not install omap_debugfs_list\n");
|
|
return ret;
|
|
}
|
|
|
|
if (dmm_is_available())
|
|
ret = drm_debugfs_create_files(omap_dmm_debugfs_list,
|
|
ARRAY_SIZE(omap_dmm_debugfs_list),
|
|
minor->debugfs_root, minor);
|
|
|
|
if (ret) {
|
|
dev_err(dev->dev, "could not install omap_dmm_debugfs_list\n");
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void omap_debugfs_cleanup(struct drm_minor *minor)
|
|
{
|
|
drm_debugfs_remove_files(omap_debugfs_list,
|
|
ARRAY_SIZE(omap_debugfs_list), minor);
|
|
if (dmm_is_available())
|
|
drm_debugfs_remove_files(omap_dmm_debugfs_list,
|
|
ARRAY_SIZE(omap_dmm_debugfs_list), minor);
|
|
}
|
|
|
|
#endif
|