![Ben Gamari](/assets/img/avatar_default.png)
The old mechanism to formatting proc files is extremely ugly. The seq_file API was designed specifically for cases like this and greatly simplifies the process. Also, most of the files in /proc really don't belong there. This patch introduces the infrastructure for putting these into debugfs and exposes all of the proc files in debugfs as well. This contains the i915 hooks rewrite as well, to make bisectability better. Signed-off-by: Ben Gamari <bgamari@gmail.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
232 lines
6.3 KiB
C
232 lines
6.3 KiB
C
/**
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* \file drm_proc.c
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* /proc support for DRM
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*
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* \par Acknowledgements:
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* Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
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* the problem with the proc files not outputting all their information.
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*/
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/*
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* Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/seq_file.h>
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#include "drmP.h"
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/***************************************************
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* Initialization, etc.
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**************************************************/
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/**
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* Proc file list.
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*/
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static struct drm_info_list drm_proc_list[] = {
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{"name", drm_name_info, 0},
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{"vm", drm_vm_info, 0},
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{"clients", drm_clients_info, 0},
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{"queues", drm_queues_info, 0},
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{"bufs", drm_bufs_info, 0},
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{"gem_names", drm_gem_name_info, DRIVER_GEM},
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{"gem_objects", drm_gem_object_info, DRIVER_GEM},
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#if DRM_DEBUG_CODE
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{"vma", drm_vma_info, 0},
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#endif
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};
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#define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
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static int drm_proc_open(struct inode *inode, struct file *file)
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{
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struct drm_info_node* node = PDE(inode)->data;
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return single_open(file, node->info_ent->show, node);
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}
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static const struct file_operations drm_proc_fops = {
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.owner = THIS_MODULE,
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.open = drm_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/**
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* Initialize a given set of proc files for a device
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*
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* \param files The array of files to create
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* \param count The number of files given
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* \param root DRI proc dir entry.
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* \param minor device minor number
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* \return Zero on success, non-zero on failure
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*
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* Create a given set of proc files represented by an array of
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* gdm_proc_lists in the given root directory.
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*/
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int drm_proc_create_files(struct drm_info_list *files, int count,
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struct proc_dir_entry *root, struct drm_minor *minor)
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{
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struct drm_device *dev = minor->dev;
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struct proc_dir_entry *ent;
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struct drm_info_node *tmp;
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char name[64];
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int i, ret;
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for (i = 0; i < count; i++) {
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u32 features = files[i].driver_features;
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if (features != 0 &&
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(dev->driver->driver_features & features) != features)
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continue;
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tmp = drm_alloc(sizeof(struct drm_info_node), _DRM_DRIVER);
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ent = create_proc_entry(files[i].name, S_IFREG | S_IRUGO, root);
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if (!ent) {
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DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
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name, files[i].name);
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drm_free(tmp, sizeof(struct drm_info_node),
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_DRM_DRIVER);
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ret = -1;
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goto fail;
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}
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ent->proc_fops = &drm_proc_fops;
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ent->data = tmp;
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tmp->minor = minor;
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tmp->info_ent = &files[i];
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list_add(&(tmp->list), &(minor->proc_nodes.list));
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}
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return 0;
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fail:
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for (i = 0; i < count; i++)
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remove_proc_entry(drm_proc_list[i].name, minor->proc_root);
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return ret;
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}
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/**
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* Initialize the DRI proc filesystem for a device
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*
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* \param dev DRM device
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* \param minor device minor number
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* \param root DRI proc dir entry.
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* \param dev_root resulting DRI device proc dir entry.
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* \return root entry pointer on success, or NULL on failure.
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*
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* Create the DRI proc root entry "/proc/dri", the device proc root entry
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* "/proc/dri/%minor%/", and each entry in proc_list as
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* "/proc/dri/%minor%/%name%".
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*/
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int drm_proc_init(struct drm_minor *minor, int minor_id,
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struct proc_dir_entry *root)
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{
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struct drm_device *dev = minor->dev;
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char name[64];
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int ret;
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INIT_LIST_HEAD(&minor->proc_nodes.list);
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sprintf(name, "%d", minor_id);
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minor->proc_root = proc_mkdir(name, root);
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if (!minor->proc_root) {
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DRM_ERROR("Cannot create /proc/dri/%s\n", name);
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return -1;
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}
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ret = drm_proc_create_files(drm_proc_list, DRM_PROC_ENTRIES,
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minor->proc_root, minor);
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if (ret) {
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remove_proc_entry(name, root);
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minor->proc_root = NULL;
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DRM_ERROR("Failed to create core drm proc files\n");
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return ret;
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}
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if (dev->driver->proc_init) {
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ret = dev->driver->proc_init(minor);
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if (ret) {
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DRM_ERROR("DRM: Driver failed to initialize "
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"/proc/dri.\n");
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return ret;
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}
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}
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return 0;
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}
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int drm_proc_remove_files(struct drm_info_list *files, int count,
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struct drm_minor *minor)
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{
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struct list_head *pos, *q;
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struct drm_info_node *tmp;
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int i;
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for (i = 0; i < count; i++) {
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list_for_each_safe(pos, q, &minor->proc_nodes.list) {
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tmp = list_entry(pos, struct drm_info_node, list);
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if (tmp->info_ent == &files[i]) {
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remove_proc_entry(files[i].name,
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minor->proc_root);
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list_del(pos);
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drm_free(tmp, sizeof(struct drm_info_node),
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_DRM_DRIVER);
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}
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}
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}
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return 0;
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}
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/**
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* Cleanup the proc filesystem resources.
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*
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* \param minor device minor number.
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* \param root DRI proc dir entry.
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* \param dev_root DRI device proc dir entry.
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* \return always zero.
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*
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* Remove all proc entries created by proc_init().
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*/
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int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root)
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{
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struct drm_device *dev = minor->dev;
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char name[64];
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if (!root || !minor->proc_root)
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return 0;
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if (dev->driver->proc_cleanup)
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dev->driver->proc_cleanup(minor);
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drm_proc_remove_files(drm_proc_list, DRM_PROC_ENTRIES, minor);
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sprintf(name, "%d", minor->index);
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remove_proc_entry(name, root);
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return 0;
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}
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