| /** |
| * \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 "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; |
| } |
| |