/* * 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_bridge.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/drm_managed.h>#include <drm/drm_gpuvm.h> #include "drm_crtc_internal.h"#include "drm_internal.h" static struct dentry *accel_debugfs_root;static struct dentry *drm_debugfs_root; /*************************************************** * Initialization, etc. **************************************************/ static int drm_name_info(struct seq_file *m, void *data){	struct drm_debugfs_entry *entry = m->private;	struct drm_device *dev = entry->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_debugfs_entry *entry = m->private;	struct drm_device *dev = entry->dev;	struct drm_file *priv;	kuid_t uid; 	seq_printf(m,		   "%20s %5s %3s master a %5s %10s %*s %20s\n",		   "command",		   "tgid",		   "dev",		   "uid",		   "magic",		   DRM_CLIENT_NAME_MAX_LEN,		   "name",		   "id"); 	/* 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) {		bool is_current_master = drm_is_current_master(priv);		struct task_struct *task;		struct pid *pid; 		mutex_lock(&priv->client_name_lock);		rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */		pid = rcu_dereference(priv->pid);		task = pid_task(pid, PIDTYPE_TGID);		uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;		seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u %*s %20llu\n",			   task ? task->comm : "<unknown>",			   pid_vnr(pid),			   priv->minor->index,			   is_current_master ? 'y' : 'n',			   priv->authenticated ? 'y' : 'n',			   from_kuid_munged(seq_user_ns(m), uid),			   priv->magic,			   DRM_CLIENT_NAME_MAX_LEN,			   priv->client_name ? priv->client_name : "<unset>",			   priv->client_id);		rcu_read_unlock();		mutex_unlock(&priv->client_name_lock);	}	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_debugfs_entry *entry = m->private;	struct drm_device *dev = entry->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_debugfs_info 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; 	if (!device_is_registered(node->minor->kdev))		return -ENODEV; 	return single_open(file, node->info_ent->show, node);} static int drm_debugfs_entry_open(struct inode *inode, struct file *file){	struct drm_debugfs_entry *entry = inode->i_private;	struct drm_debugfs_info *node = &entry->file;	struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel; 	if (!device_is_registered(minor->kdev))		return -ENODEV; 	return single_open(file, node->show, entry);} static const struct file_operations drm_debugfs_entry_fops = {	.owner = THIS_MODULE,	.open = drm_debugfs_entry_open,	.read = seq_read,	.llseek = seq_lseek,	.release = single_release,}; 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_gpuva_info - dump the given DRM GPU VA space * @m: pointer to the &seq_file to write * @gpuvm: the &drm_gpuvm representing the GPU VA space * * Dumps the GPU VA mappings of a given DRM GPU VA manager. * * For each DRM GPU VA space drivers should call this function from their * &drm_info_list's show callback. * * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized */int drm_debugfs_gpuva_info(struct seq_file *m,			   struct drm_gpuvm *gpuvm){	struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node; 	if (!gpuvm->name)		return -ENODEV; 	seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",		   gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);	seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",		   kva->va.addr, kva->va.addr + kva->va.range);	seq_puts(m, "\n");	seq_puts(m, " VAs | start              | range              | end                | object             | object offset\n");	seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");	drm_gpuvm_for_each_va(va, gpuvm) {		if (unlikely(va == kva))			continue; 		seq_printf(m, "     | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",			   va->va.addr, va->va.range, va->va.addr + va->va.range,			   (u64)(uintptr_t)va->gem.obj, va->gem.offset);	} 	return 0;}EXPORT_SYMBOL(drm_debugfs_gpuva_info); /** * 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_dev_fini(). */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 = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);		if (tmp == NULL)			continue; 		tmp->minor = minor;		tmp->dent = debugfs_create_file(files[i].name,						0444, root, tmp,						&drm_debugfs_fops);		tmp->info_ent = &files[i];	}}EXPORT_SYMBOL(drm_debugfs_create_files); int drm_debugfs_remove_files(const struct drm_info_list *files, int count,			     struct dentry *root, struct drm_minor *minor){	int i; 	for (i = 0; i < count; i++) {		struct dentry *dent = debugfs_lookup(files[i].name, root); 		if (!dent)			continue; 		drmm_kfree(minor->dev, d_inode(dent)->i_private);		debugfs_remove(dent);	}	return 0;}EXPORT_SYMBOL(drm_debugfs_remove_files); void drm_debugfs_bridge_params(void){	drm_bridge_debugfs_params(drm_debugfs_root);} void drm_debugfs_init_root(void){	drm_debugfs_root = debugfs_create_dir("dri", NULL);#if IS_ENABLED(CONFIG_DRM_ACCEL)	accel_debugfs_root = debugfs_create_dir("accel", NULL);#endif} void drm_debugfs_remove_root(void){#if IS_ENABLED(CONFIG_DRM_ACCEL)	debugfs_remove(accel_debugfs_root);#endif	debugfs_remove(drm_debugfs_root);} static int drm_debugfs_proc_info_show(struct seq_file *m, void *unused){	struct pid *pid;	struct task_struct *task;	struct drm_file *file = m->private; 	if (!file)		return -EINVAL; 	rcu_read_lock();	pid = rcu_dereference(file->pid);	task = pid_task(pid, PIDTYPE_TGID); 	seq_printf(m, "pid: %d\n", task ? task->pid : 0);	seq_printf(m, "comm: %s\n", task ? task->comm : "Unset");	rcu_read_unlock();	return 0;} static int drm_debufs_proc_info_open(struct inode *inode, struct file *file){	return single_open(file, drm_debugfs_proc_info_show, inode->i_private);} static const struct file_operations drm_debugfs_proc_info_fops = {	.owner = THIS_MODULE,	.open = drm_debufs_proc_info_open,	.read = seq_read,	.llseek = seq_lseek,	.release = single_release,}; /** * drm_debugfs_clients_add - Add a per client debugfs directory * @file: drm_file for a client * * Create the debugfs directory for each client. This will be used to populate * driver specific data for each client. * * Also add the process information debugfs file for each client to tag * which client belongs to which process. */void drm_debugfs_clients_add(struct drm_file *file){	char *client; 	client = kasprintf(GFP_KERNEL, "client-%llu", file->client_id);	if (!client)		return; 	/* Create a debugfs directory for the client in root on drm debugfs */	file->debugfs_client = debugfs_create_dir(client, drm_debugfs_root);	kfree(client); 	debugfs_create_file("proc_info", 0444, file->debugfs_client, file,			    &drm_debugfs_proc_info_fops); 	client = kasprintf(GFP_KERNEL, "../%s", file->minor->dev->unique);	if (!client)		return; 	/* Create a link from client_id to the drm device this client id belongs to */	debugfs_create_symlink("device", file->debugfs_client, client);	kfree(client);} /** * drm_debugfs_clients_remove - removes all debugfs directories and files * @file: drm_file for a client * * Removes the debugfs directories recursively from the client directory. * * There is also a possibility that debugfs files are open while the drm_file * is released. */void drm_debugfs_clients_remove(struct drm_file *file){	debugfs_remove_recursive(file->debugfs_client);	file->debugfs_client = NULL;} /** * drm_debugfs_dev_init - create debugfs directory for the device * @dev: the device which we want to create the directory for * * Creates the debugfs directory for the device under the given root directory. */void drm_debugfs_dev_init(struct drm_device *dev){	if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL))		dev->debugfs_root = debugfs_create_dir(dev->unique, accel_debugfs_root);	else		dev->debugfs_root = debugfs_create_dir(dev->unique, drm_debugfs_root);} /** * drm_debugfs_dev_fini - cleanup debugfs directory * @dev: the device to cleanup the debugfs stuff * * Remove the debugfs directory, might be called multiple times. */void drm_debugfs_dev_fini(struct drm_device *dev){	debugfs_remove_recursive(dev->debugfs_root);	dev->debugfs_root = NULL;} void drm_debugfs_dev_register(struct drm_device *dev){	drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES); 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {		drm_framebuffer_debugfs_init(dev);		drm_client_debugfs_init(dev);	}	if (drm_drv_uses_atomic_modeset(dev))		drm_atomic_debugfs_init(dev);} int drm_debugfs_register(struct drm_minor *minor, int minor_id){	struct drm_device *dev = minor->dev;	char name[64]; 	sprintf(name, "%d", minor_id);	minor->debugfs_symlink = debugfs_create_symlink(name, drm_debugfs_root,							dev->unique); 	/* TODO: Only for compatibility with drivers */	minor->debugfs_root = dev->debugfs_root; 	if (dev->driver->debugfs_init && dev->render != minor)		dev->driver->debugfs_init(minor); 	return 0;} void drm_debugfs_unregister(struct drm_minor *minor){	debugfs_remove(minor->debugfs_symlink);	minor->debugfs_symlink = NULL;} /** * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list * @dev: drm device for the ioctl * @name: debugfs file name * @show: show callback * @data: driver-private data, should not be device-specific * * Add a given file entry to the DRM device debugfs file list to be created on * drm_debugfs_init. */void drm_debugfs_add_file(struct drm_device *dev, const char *name,			  int (*show)(struct seq_file*, void*), void *data){	struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL); 	if (!entry)		return; 	entry->file.name = name;	entry->file.show = show;	entry->file.data = data;	entry->dev = dev; 	debugfs_create_file(name, 0444, dev->debugfs_root, entry,			    &drm_debugfs_entry_fops);}EXPORT_SYMBOL(drm_debugfs_add_file); /** * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list * @dev: drm device for the ioctl * @files: The array of files to create * @count: The number of files given * * Add a given set of debugfs files represented by an array of * &struct drm_debugfs_info in the DRM device debugfs file list. */void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count){	int i; 	for (i = 0; i < count; i++)		drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);}

Lines 1–500 of 883. Load more