/* * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com * * Copyright 2008 Ben Gamari <bgamari@gmail.com> * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include <linux/debugfs.h>#include <linux/export.h>#include <linux/seq_file.h>#include <linux/slab.h>#include <linux/uaccess.h> #include <drm/drm_atomic.h>#include <drm/drm_auth.h>#include <drm/drm_client.h>#include <drm/drm_debugfs.h>#include <drm/drm_device.h>#include <drm/drm_drv.h>#include <drm/drm_edid.h>#include <drm/drm_file.h>#include <drm/drm_gem.h> #include "drm_crtc_internal.h"#include "drm_internal.h" #if defined(CONFIG_DEBUG_FS) /*************************************************** * Initialization, etc. **************************************************/ static int drm_name_info(struct seq_file *m, void *data){	struct drm_info_node *node = (struct drm_info_node *) m->private;	struct drm_minor *minor = node->minor;	struct drm_device *dev = minor->dev;	struct drm_master *master; 	mutex_lock(&dev->master_mutex);	master = dev->master;	seq_printf(m, "%s", dev->driver->name);	if (dev->dev)		seq_printf(m, " dev=%s", dev_name(dev->dev));	if (master && master->unique)		seq_printf(m, " master=%s", master->unique);	if (dev->unique)		seq_printf(m, " unique=%s", dev->unique);	seq_printf(m, "\n");	mutex_unlock(&dev->master_mutex); 	return 0;} static int drm_clients_info(struct seq_file *m, void *data){	struct drm_info_node *node = (struct drm_info_node *) m->private;	struct drm_device *dev = node->minor->dev;	struct drm_file *priv;	kuid_t uid; 	seq_printf(m,		   "%20s %5s %3s master a %5s %10s\n",		   "command",		   "pid",		   "dev",		   "uid",		   "magic"); 	/* dev->filelist is sorted youngest first, but we want to present	 * oldest first (i.e. kernel, servers, clients), so walk backwardss.	 */	mutex_lock(&dev->filelist_mutex);	list_for_each_entry_reverse(priv, &dev->filelist, lhead) {		struct task_struct *task;		bool is_current_master = drm_is_current_master(priv); 		rcu_read_lock(); /* locks pid_task()->comm */		task = pid_task(priv->pid, PIDTYPE_PID);		uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;		seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u\n",			   task ? task->comm : "<unknown>",			   pid_vnr(priv->pid),			   priv->minor->index,			   is_current_master ? 'y' : 'n',			   priv->authenticated ? 'y' : 'n',			   from_kuid_munged(seq_user_ns(m), uid),			   priv->magic);		rcu_read_unlock();	}	mutex_unlock(&dev->filelist_mutex);	return 0;} static int drm_gem_one_name_info(int id, void *ptr, void *data){	struct drm_gem_object *obj = ptr;	struct seq_file *m = data; 	seq_printf(m, "%6d %8zd %7d %8d\n",		   obj->name, obj->size,		   obj->handle_count,		   kref_read(&obj->refcount));	return 0;} static int drm_gem_name_info(struct seq_file *m, void *data){	struct drm_info_node *node = (struct drm_info_node *) m->private;	struct drm_device *dev = node->minor->dev; 	seq_printf(m, "  name     size handles refcount\n"); 	mutex_lock(&dev->object_name_lock);	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);	mutex_unlock(&dev->object_name_lock); 	return 0;} static const struct drm_info_list drm_debugfs_list[] = {	{"name", drm_name_info, 0},	{"clients", drm_clients_info, 0},	{"gem_names", drm_gem_name_info, DRIVER_GEM},};#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)  static int drm_debugfs_open(struct inode *inode, struct file *file){	struct drm_info_node *node = inode->i_private; 	return single_open(file, node->info_ent->show, node);}  static const struct file_operations drm_debugfs_fops = {	.owner = THIS_MODULE,	.open = drm_debugfs_open,	.read = seq_read,	.llseek = seq_lseek,	.release = single_release,};  /** * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM * 			minor * @files: The array of files to create * @count: The number of files given * @root: DRI debugfs dir entry. * @minor: device minor number * * Create a given set of debugfs files represented by an array of * &struct drm_info_list in the given root directory. These files will be removed * automatically on drm_debugfs_cleanup(). */void drm_debugfs_create_files(const struct drm_info_list *files, int count,			      struct dentry *root, struct drm_minor *minor){	struct drm_device *dev = minor->dev;	struct drm_info_node *tmp;	int i; 	for (i = 0; i < count; i++) {		u32 features = files[i].driver_features; 		if (features && !drm_core_check_all_features(dev, features))			continue; 		tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);		if (tmp == NULL)			continue; 		tmp->minor = minor;		tmp->dent = debugfs_create_file(files[i].name,						S_IFREG | S_IRUGO, root, tmp,						&drm_debugfs_fops);		tmp->info_ent = &files[i]; 		mutex_lock(&minor->debugfs_lock);		list_add(&tmp->list, &minor->debugfs_list);		mutex_unlock(&minor->debugfs_lock);	}}EXPORT_SYMBOL(drm_debugfs_create_files); int drm_debugfs_init(struct drm_minor *minor, int minor_id,		     struct dentry *root){	struct drm_device *dev = minor->dev;	char name[64]; 	INIT_LIST_HEAD(&minor->debugfs_list);	mutex_init(&minor->debugfs_lock);	sprintf(name, "%d", minor_id);	minor->debugfs_root = debugfs_create_dir(name, root); 	drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,				 minor->debugfs_root, minor); 	if (drm_drv_uses_atomic_modeset(dev)) {		drm_atomic_debugfs_init(minor);	} 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {		drm_framebuffer_debugfs_init(minor); 		drm_client_debugfs_init(minor);	} 	if (dev->driver->debugfs_init)		dev->driver->debugfs_init(minor); 	return 0;}  int drm_debugfs_remove_files(const struct drm_info_list *files, int count,			     struct drm_minor *minor){	struct list_head *pos, *q;	struct drm_info_node *tmp;	int i; 	mutex_lock(&minor->debugfs_lock);	for (i = 0; i < count; i++) {		list_for_each_safe(pos, q, &minor->debugfs_list) {			tmp = list_entry(pos, struct drm_info_node, list);			if (tmp->info_ent == &files[i]) {				debugfs_remove(tmp->dent);				list_del(pos);				kfree(tmp);			}		}	}	mutex_unlock(&minor->debugfs_lock);	return 0;}EXPORT_SYMBOL(drm_debugfs_remove_files); static void drm_debugfs_remove_all_files(struct drm_minor *minor){	struct drm_info_node *node, *tmp; 	mutex_lock(&minor->debugfs_lock);	list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {		debugfs_remove(node->dent);		list_del(&node->list);		kfree(node);	}	mutex_unlock(&minor->debugfs_lock);} void drm_debugfs_cleanup(struct drm_minor *minor){	if (!minor->debugfs_root)		return; 	drm_debugfs_remove_all_files(minor); 	debugfs_remove_recursive(minor->debugfs_root);	minor->debugfs_root = NULL;} static int connector_show(struct seq_file *m, void *data){	struct drm_connector *connector = m->private; 	seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force)); 	return 0;} static int connector_open(struct inode *inode, struct file *file){	struct drm_connector *dev = inode->i_private; 	return single_open(file, connector_show, dev);} static ssize_t connector_write(struct file *file, const char __user *ubuf,			       size_t len, loff_t *offp){	struct seq_file *m = file->private_data;	struct drm_connector *connector = m->private;	char buf[12]; 	if (len > sizeof(buf) - 1)		return -EINVAL; 	if (copy_from_user(buf, ubuf, len))		return -EFAULT; 	buf[len] = '\0'; 	if (sysfs_streq(buf, "on"))		connector->force = DRM_FORCE_ON;	else if (sysfs_streq(buf, "digital"))		connector->force = DRM_FORCE_ON_DIGITAL;	else if (sysfs_streq(buf, "off"))		connector->force = DRM_FORCE_OFF;	else if (sysfs_streq(buf, "unspecified"))		connector->force = DRM_FORCE_UNSPECIFIED;	else		return -EINVAL; 	return len;} static int edid_show(struct seq_file *m, void *data){	return drm_edid_override_show(m->private, m);} static int edid_open(struct inode *inode, struct file *file){	struct drm_connector *dev = inode->i_private; 	return single_open(file, edid_show, dev);} static ssize_t edid_write(struct file *file, const char __user *ubuf,			  size_t len, loff_t *offp){	struct seq_file *m = file->private_data;	struct drm_connector *connector = m->private;	char *buf;	int ret; 	buf = memdup_user(ubuf, len);	if (IS_ERR(buf))		return PTR_ERR(buf); 	if (len == 5 && !strncmp(buf, "reset", 5))		ret = drm_edid_override_reset(connector);	else		ret = drm_edid_override_set(connector, buf, len); 	kfree(buf); 	return ret ? ret : len;} /* * Returns the min and max vrr vfreq through the connector's debugfs file. * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range */static int vrr_range_show(struct seq_file *m, void *data){	struct drm_connector *connector = m->private; 	if (connector->status != connector_status_connected)		return -ENODEV; 	seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);	seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq); 	return 0;}DEFINE_SHOW_ATTRIBUTE(vrr_range); /* * Returns Connector's max supported bpc through debugfs file. * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc */static int output_bpc_show(struct seq_file *m, void *data){	struct drm_connector *connector = m->private; 	if (connector->status != connector_status_connected)		return -ENODEV; 	seq_printf(m, "Maximum: %u\n", connector->display_info.bpc); 	return 0;}DEFINE_SHOW_ATTRIBUTE(output_bpc); static const struct file_operations drm_edid_fops = {	.owner = THIS_MODULE,	.open = edid_open,	.read = seq_read,	.llseek = seq_lseek,	.release = single_release,	.write = edid_write};  static const struct file_operations drm_connector_fops = {	.owner = THIS_MODULE,	.open = connector_open,	.read = seq_read,	.llseek = seq_lseek,	.release = single_release,	.write = connector_write}; void drm_debugfs_connector_add(struct drm_connector *connector){	struct drm_minor *minor = connector->dev->primary;	struct dentry *root; 	if (!minor->debugfs_root)		return; 	root = debugfs_create_dir(connector->name, minor->debugfs_root);	connector->debugfs_entry = root; 	/* force */	debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,			    &drm_connector_fops); 	/* edid */	debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,			    &drm_edid_fops); 	/* vrr range */	debugfs_create_file("vrr_range", S_IRUGO, root, connector,			    &vrr_range_fops); 	/* max bpc */	debugfs_create_file("output_bpc", 0444, root, connector,			    &output_bpc_fops); 	if (connector->funcs->debugfs_init)		connector->funcs->debugfs_init(connector, root);} void drm_debugfs_connector_remove(struct drm_connector *connector){	if (!connector->debugfs_entry)		return; 	debugfs_remove_recursive(connector->debugfs_entry); 	connector->debugfs_entry = NULL;} void drm_debugfs_crtc_add(struct drm_crtc *crtc){	struct drm_minor *minor = crtc->dev->primary;	struct dentry *root;	char *name; 	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);	if (!name)		return; 	root = debugfs_create_dir(name, minor->debugfs_root);	kfree(name); 	crtc->debugfs_entry = root; 	drm_debugfs_crtc_crc_add(crtc);} void drm_debugfs_crtc_remove(struct drm_crtc *crtc){	debugfs_remove_recursive(crtc->debugfs_entry);	crtc->debugfs_entry = NULL;} #endif /* CONFIG_DEBUG_FS */