![Marcin Slusarz](/assets/img/avatar_default.png)
It printed garbage. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
221 lines
5.9 KiB
C
221 lines
5.9 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 <linux/slab.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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#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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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 = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
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if (tmp == NULL) {
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ret = -1;
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goto fail;
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}
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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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ent = proc_create_data(files[i].name, S_IRUGO, root,
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&drm_proc_fops, tmp);
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if (!ent) {
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DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
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root->name, files[i].name);
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list_del(&tmp->list);
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kfree(tmp);
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ret = -1;
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goto fail;
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}
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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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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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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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kfree(tmp);
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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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char name[64];
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if (!root || !minor->proc_root)
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return 0;
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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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