/** * \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; }