We have debugfs and sysfs for these things now!
Digging through the dungeons of old code and wading through countless result pages on google indeed turned up one user of this:
libdrm before 2001 checks via the presence of /proc/dri/0 whether the kernel drm is present and has a module successfully loaded.
Frankly I think that demanding from users that they upgrade to a more modern libdrm is in order.
Signed-off-by: Daniel Vetter daniel.vetter@ffwll.ch --- drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/drm_drv.c | 8 -- drivers/gpu/drm/drm_proc.c | 220 -------------------------------------------- drivers/gpu/drm/drm_stub.c | 25 ++--- include/drm/drmP.h | 9 -- 5 files changed, 8 insertions(+), 256 deletions(-) delete mode 100644 drivers/gpu/drm/drm_proc.c
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index f65f65e..36b20b1 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -7,7 +7,7 @@ ccflags-y := -Iinclude/drm drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \ drm_context.o drm_dma.o \ drm_drv.o drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \ - drm_lock.o drm_memory.o drm_proc.o drm_stub.o drm_vm.o \ + drm_lock.o drm_memory.o drm_stub.o drm_vm.o \ drm_agpsupport.o drm_scatter.o ati_pcigart.o drm_pci.o \ drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \ drm_crtc.o drm_modes.o drm_edid.o \ diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index bbabc05..0bb4b84 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -262,13 +262,6 @@ static int __init drm_core_init(void) goto err_p2; }
- drm_proc_root = proc_mkdir("dri", NULL); - if (!drm_proc_root) { - DRM_ERROR("Cannot create /proc/dri\n"); - ret = -1; - goto err_p3; - } - drm_debugfs_root = debugfs_create_dir("dri", NULL); if (!drm_debugfs_root) { DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); @@ -291,7 +284,6 @@ err_p1:
static void __exit drm_core_exit(void) { - remove_proc_entry("dri", NULL); debugfs_remove(drm_debugfs_root); drm_sysfs_destroy();
diff --git a/drivers/gpu/drm/drm_proc.c b/drivers/gpu/drm/drm_proc.c deleted file mode 100644 index 371c695..0000000 --- a/drivers/gpu/drm/drm_proc.c +++ /dev/null @@ -1,220 +0,0 @@ -/** - * \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}, - {"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; -} - diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c index 21bcd4a..d8e6927 100644 --- a/drivers/gpu/drm/drm_stub.c +++ b/drivers/gpu/drm/drm_stub.c @@ -60,7 +60,6 @@ module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600) struct idr drm_minors_idr;
struct class *drm_class; -struct proc_dir_entry *drm_proc_root; struct dentry *drm_debugfs_root;
int drm_err(const char *func, const char *format, ...) @@ -329,7 +328,7 @@ EXPORT_SYMBOL(drm_fill_in_dev); * \return negative number on failure. * * Search an empty entry and initialize it to the given parameters, and - * create the proc init entry via proc_init(). This routines assigns + * create the sysfs/debugfs init entry. This routines assigns * minor numbers to secondary heads of multi-headed cards */ int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type) @@ -358,20 +357,11 @@ int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
idr_replace(&drm_minors_idr, new_minor, minor_id);
- if (type == DRM_MINOR_LEGACY) { - ret = drm_proc_init(new_minor, minor_id, drm_proc_root); - if (ret) { - DRM_ERROR("DRM: Failed to initialize /proc/dri.\n"); - goto err_mem; - } - } else - new_minor->proc_root = NULL; - #if defined(CONFIG_DEBUG_FS) ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); if (ret) { DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); - goto err_g2; + goto err_mem; } #endif
@@ -379,7 +369,7 @@ int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type) if (ret) { printk(KERN_ERR "DRM: Error sysfs_device_add.\n"); - goto err_g2; + goto err_debugfs; } *minor = new_minor;
@@ -387,9 +377,10 @@ int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type) return 0;
-err_g2: - if (new_minor->type == DRM_MINOR_LEGACY) - drm_proc_cleanup(new_minor, drm_proc_root); +err_debugfs: +#if defined(CONFIG_DEBUG_FS) + drm_debugfs_cleanup(new_minor); +#endif err_mem: kfree(new_minor); err_idr: @@ -415,8 +406,6 @@ int drm_put_minor(struct drm_minor **minor_p)
DRM_DEBUG("release secondary minor %d\n", minor->index);
- if (minor->type == DRM_MINOR_LEGACY) - drm_proc_cleanup(minor, drm_proc_root); #if defined(CONFIG_DEBUG_FS) drm_debugfs_cleanup(minor); #endif diff --git a/include/drm/drmP.h b/include/drm/drmP.h index df21016..f217ecc 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -45,7 +45,6 @@ #include <linux/kernel.h> #include <linux/miscdevice.h> #include <linux/fs.h> -#include <linux/proc_fs.h> #include <linux/init.h> #include <linux/file.h> #include <linux/platform_device.h> @@ -1016,8 +1015,6 @@ struct drm_minor { struct device kdev; /**< Linux device */ struct drm_device *dev;
- struct proc_dir_entry *proc_root; /**< proc directory entry */ - struct drm_info_node proc_nodes; struct dentry *debugfs_root;
struct list_head debugfs_list; @@ -1503,18 +1500,12 @@ extern unsigned int drm_vblank_offdelay; extern unsigned int drm_timestamp_precision;
extern struct class *drm_class; -extern struct proc_dir_entry *drm_proc_root; extern struct dentry *drm_debugfs_root;
extern struct idr drm_minors_idr;
extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
- /* Proc support (drm_proc.h) */ -extern int drm_proc_init(struct drm_minor *minor, int minor_id, - struct proc_dir_entry *root); -extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root); - /* Debugfs support */ #if defined(CONFIG_DEBUG_FS) extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,