/** * \file drm_proc.c * /proc support for DRM * * \author Rickard E. (Rik) Faith <faith@valinux.com> * \author Gareth Hughes <gareth@valinux.com> * * \par Acknowledgements: *    Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix *    the problem with the proc files not outputting all their information. */ /* * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * 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/seq_file.h>#include <linux/slab.h>#include <linux/export.h>#include "drmP.h" /*************************************************** * Initialization, etc. **************************************************/ /** * Proc file list. */static struct drm_info_list drm_proc_list[] = {	{"name", drm_name_info, 0},	{"vm", drm_vm_info, 0},	{"clients", drm_clients_info, 0},	{"queues", drm_queues_info, 0},	{"bufs", drm_bufs_info, 0},	{"gem_names", drm_gem_name_info, DRIVER_GEM},#if DRM_DEBUG_CODE	{"vma", drm_vma_info, 0},#endif};#define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list) static int drm_proc_open(struct inode *inode, struct file *file){	struct drm_info_node* node = PDE(inode)->data; 	return single_open(file, node->info_ent->show, node);} static const struct file_operations drm_proc_fops = {	.owner = THIS_MODULE,	.open = drm_proc_open,	.read = seq_read,	.llseek = seq_lseek,	.release = single_release,};  /** * Initialize a given set of proc files for a device * * \param files The array of files to create * \param count The number of files given * \param root DRI proc dir entry. * \param minor device minor number * \return Zero on success, non-zero on failure * * Create a given set of proc files represented by an array of * gdm_proc_lists in the given root directory. */int drm_proc_create_files(struct drm_info_list *files, int count,			  struct proc_dir_entry *root, struct drm_minor *minor){	struct drm_device *dev = minor->dev;	struct proc_dir_entry *ent;	struct drm_info_node *tmp;	int i, ret; 	for (i = 0; i < count; i++) {		u32 features = files[i].driver_features; 		if (features != 0 &&		    (dev->driver->driver_features & features) != features)			continue; 		tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);		if (tmp == NULL) {			ret = -1;			goto fail;		}		tmp->minor = minor;		tmp->info_ent = &files[i];		list_add(&tmp->list, &minor->proc_nodes.list); 		ent = proc_create_data(files[i].name, S_IRUGO, root,				       &drm_proc_fops, tmp);		if (!ent) {			DRM_ERROR("Cannot create /proc/dri/%s/%s\n",				  root->name, files[i].name);			list_del(&tmp->list);			kfree(tmp);			ret = -1;			goto fail;		} 	}	return 0; fail:	for (i = 0; i < count; i++)		remove_proc_entry(drm_proc_list[i].name, minor->proc_root);	return ret;} /** * Initialize the DRI proc filesystem for a device * * \param dev DRM device * \param minor device minor number * \param root DRI proc dir entry. * \param dev_root resulting DRI device proc dir entry. * \return root entry pointer on success, or NULL on failure. * * Create the DRI proc root entry "/proc/dri", the device proc root entry * "/proc/dri/%minor%/", and each entry in proc_list as * "/proc/dri/%minor%/%name%". */int drm_proc_init(struct drm_minor *minor, int minor_id,		  struct proc_dir_entry *root){	char name[64];	int ret; 	INIT_LIST_HEAD(&minor->proc_nodes.list);	sprintf(name, "%d", minor_id);	minor->proc_root = proc_mkdir(name, root);	if (!minor->proc_root) {		DRM_ERROR("Cannot create /proc/dri/%s\n", name);		return -1;	} 	ret = drm_proc_create_files(drm_proc_list, DRM_PROC_ENTRIES,				    minor->proc_root, minor);	if (ret) {		remove_proc_entry(name, root);		minor->proc_root = NULL;		DRM_ERROR("Failed to create core drm proc files\n");		return ret;	} 	return 0;} int drm_proc_remove_files(struct drm_info_list *files, int count,			  struct drm_minor *minor){	struct list_head *pos, *q;	struct drm_info_node *tmp;	int i; 	for (i = 0; i < count; i++) {		list_for_each_safe(pos, q, &minor->proc_nodes.list) {			tmp = list_entry(pos, struct drm_info_node, list);			if (tmp->info_ent == &files[i]) {				remove_proc_entry(files[i].name,						  minor->proc_root);				list_del(pos);				kfree(tmp);			}		}	}	return 0;} /** * Cleanup the proc filesystem resources. * * \param minor device minor number. * \param root DRI proc dir entry. * \param dev_root DRI device proc dir entry. * \return always zero. * * Remove all proc entries created by proc_init(). */int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root){	char name[64]; 	if (!root || !minor->proc_root)		return 0; 	drm_proc_remove_files(drm_proc_list, DRM_PROC_ENTRIES, minor); 	sprintf(name, "%d", minor->index);	remove_proc_entry(name, root); 	return 0;}