cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/drm_debugfs.c

Directory: drivers/gpu/drm
/**
 * \file drm_debugfs.c
 * debugfs support for DRM
 *
 * \author Ben Gamari <bgamari@gmail.com>
 */

/*
 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
 *
 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
 *
 * 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/debugfs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <drm/drmP.h>
#include <drm/drm_edid.h>
#include <drm/drm_atomic.h>
#include "drm_internal.h"
#include "drm_crtc_internal.h"

#if defined(CONFIG_DEBUG_FS)

/***************************************************
 * Initialization, etc.
 **************************************************/


static const struct drm_info_list drm_debugfs_list[] = {
	{"name", drm_name_info, 0},
	{"clients", drm_clients_info, 0},
	{"gem_names", drm_gem_name_info, DRIVER_GEM},
};

#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)



static int drm_debugfs_open(struct inode *inode, struct file *file) { struct drm_info_node *node = inode->i_private; return single_open(file, node->info_ent->show, node); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Gamari39100.00%1100.00%
Total39100.00%1100.00%

static const struct file_operations drm_debugfs_fops = { .owner = THIS_MODULE, .open = drm_debugfs_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; /** * Initialize a given set of debugfs files for a device * * \param files The array of files to create * \param count The number of files given * \param root DRI debugfs dir entry. * \param minor device minor number * \return Zero on success, non-zero on failure * * Create a given set of debugfs files represented by an array of * &drm_info_list in the given root directory. These files will be removed * automatically on drm_debugfs_cleanup(). */
int drm_debugfs_create_files(const struct drm_info_list *files, int count, struct dentry *root, struct drm_minor *minor) { struct drm_device *dev = minor->dev; struct dentry *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; } ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO, root, tmp, &drm_debugfs_fops); if (!ent) { DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n", root, files[i].name); kfree(tmp); ret = -1; goto fail; } tmp->minor = minor; tmp->dent = ent; tmp->info_ent = &files[i]; mutex_lock(&minor->debugfs_lock); list_add(&tmp->list, &minor->debugfs_list); mutex_unlock(&minor->debugfs_lock); } return 0; fail: drm_debugfs_remove_files(files, count, minor); return ret; }

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PersonTokensPropCommitsCommitProp
Ben Gamari20482.93%112.50%
Marcin Ślusarz187.32%225.00%
Jiri Slaby166.50%112.50%
Eric Anholt31.22%112.50%
Emil Velikov31.22%112.50%
Damien Lespiau10.41%112.50%
Al Viro10.41%112.50%
Total246100.00%8100.00%

EXPORT_SYMBOL(drm_debugfs_create_files); /** * Initialize the DRI debugfs filesystem for a device * * \param dev DRM device * \param minor device minor number * \param root DRI debugfs dir entry. * * Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry * "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as * "/sys/kernel/debug/dri/%minor%/%name%". */
int drm_debugfs_init(struct drm_minor *minor, int minor_id, struct dentry *root) { struct drm_device *dev = minor->dev; char name[64]; int ret; INIT_LIST_HEAD(&minor->debugfs_list); mutex_init(&minor->debugfs_lock); sprintf(name, "%d", minor_id); minor->debugfs_root = debugfs_create_dir(name, root); if (!minor->debugfs_root) { DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name); return -1; } ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor->debugfs_root, minor); if (ret) { debugfs_remove(minor->debugfs_root); minor->debugfs_root = NULL; DRM_ERROR("Failed to create core drm debugfs files\n"); return ret; } if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { ret = drm_atomic_debugfs_init(minor); if (ret) { DRM_ERROR("Failed to create atomic debugfs files\n"); return ret; } } if (dev->driver->debugfs_init) { ret = dev->driver->debugfs_init(minor); if (ret) { DRM_ERROR("DRM: Driver failed to initialize " "/sys/kernel/debug/dri.\n"); return ret; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Gamari16279.02%125.00%
Rob Clark3215.61%125.00%
Marcin Ślusarz94.39%125.00%
GeunSik Lim20.98%125.00%
Total205100.00%4100.00%

/** * Remove a list of debugfs files * * \param files The list of files * \param count The number of files * \param minor The minor of which we should remove the files * \return always zero. * * Remove all debugfs entries created by debugfs_init(). */
int drm_debugfs_remove_files(const struct drm_info_list *files, int count, struct drm_minor *minor) { struct list_head *pos, *q; struct drm_info_node *tmp; int i; mutex_lock(&minor->debugfs_lock); for (i = 0; i < count; i++) { list_for_each_safe(pos, q, &minor->debugfs_list) { tmp = list_entry(pos, struct drm_info_node, list); if (tmp->info_ent == &files[i]) { debugfs_remove(tmp->dent); list_del(pos); kfree(tmp); } } } mutex_unlock(&minor->debugfs_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Gamari10384.43%125.00%
Marcin Ślusarz1713.93%125.00%
Damien Lespiau10.82%125.00%
Eric Anholt10.82%125.00%
Total122100.00%4100.00%

EXPORT_SYMBOL(drm_debugfs_remove_files);
static void drm_debugfs_remove_all_files(struct drm_minor *minor) { struct drm_info_node *node, *tmp; mutex_lock(&minor->debugfs_lock); list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) { debugfs_remove(node->dent); list_del(&node->list); kfree(node); } mutex_unlock(&minor->debugfs_lock); }

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PersonTokensPropCommitsCommitProp
Noralf Trönnes67100.00%1100.00%
Total67100.00%1100.00%

/** * Cleanup the debugfs filesystem resources. * * \param minor device minor number. * \return always zero. * * Remove all debugfs entries created by debugfs_init(). */
int drm_debugfs_cleanup(struct drm_minor *minor) { struct drm_device *dev = minor->dev; if (!minor->debugfs_root) return 0; if (dev->driver->debugfs_cleanup) dev->driver->debugfs_cleanup(minor); drm_debugfs_remove_all_files(minor); debugfs_remove_recursive(minor->debugfs_root); minor->debugfs_root = NULL; return 0; }

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PersonTokensPropCommitsCommitProp
Ben Gamari6597.01%150.00%
Noralf Trönnes22.99%150.00%
Total67100.00%2100.00%


static int connector_show(struct seq_file *m, void *data) { struct drm_connector *connector = m->private; const char *status; switch (connector->force) { case DRM_FORCE_ON: status = "on\n"; break; case DRM_FORCE_ON_DIGITAL: status = "digital\n"; break; case DRM_FORCE_OFF: status = "off\n"; break; case DRM_FORCE_UNSPECIFIED: status = "unspecified\n"; break; default: return 0; } seq_puts(m, status); return 0; }

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PersonTokensPropCommitsCommitProp
Thomas Wood83100.00%1100.00%
Total83100.00%1100.00%


static int connector_open(struct inode *inode, struct file *file) { struct drm_connector *dev = inode->i_private; return single_open(file, connector_show, dev); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Wood35100.00%1100.00%
Total35100.00%1100.00%


static ssize_t connector_write(struct file *file, const char __user *ubuf, size_t len, loff_t *offp) { struct seq_file *m = file->private_data; struct drm_connector *connector = m->private; char buf[12]; if (len > sizeof(buf) - 1) return -EINVAL; if (copy_from_user(buf, ubuf, len)) return -EFAULT; buf[len] = '\0'; if (!strcmp(buf, "on")) connector->force = DRM_FORCE_ON; else if (!strcmp(buf, "digital")) connector->force = DRM_FORCE_ON_DIGITAL; else if (!strcmp(buf, "off")) connector->force = DRM_FORCE_OFF; else if (!strcmp(buf, "unspecified")) connector->force = DRM_FORCE_UNSPECIFIED; else return -EINVAL; return len; }

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PersonTokensPropCommitsCommitProp
Thomas Wood160100.00%1100.00%
Total160100.00%1100.00%


static int edid_show(struct seq_file *m, void *data) { struct drm_connector *connector = m->private; struct drm_property_blob *edid = connector->edid_blob_ptr; if (connector->override_edid && edid) seq_write(m, edid->data, edid->length); return 0; }

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PersonTokensPropCommitsCommitProp
Thomas Wood57100.00%1100.00%
Total57100.00%1100.00%


static int edid_open(struct inode *inode, struct file *file) { struct drm_connector *dev = inode->i_private; return single_open(file, edid_show, dev); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Wood35100.00%1100.00%
Total35100.00%1100.00%


static ssize_t edid_write(struct file *file, const char __user *ubuf, size_t len, loff_t *offp) { struct seq_file *m = file->private_data; struct drm_connector *connector = m->private; char *buf; struct edid *edid; int ret; buf = memdup_user(ubuf, len); if (IS_ERR(buf)) return PTR_ERR(buf); edid = (struct edid *) buf; if (len == 5 && !strncmp(buf, "reset", 5)) { connector->override_edid = false; ret = drm_mode_connector_update_edid_property(connector, NULL); } else if (len < EDID_LENGTH || EDID_LENGTH * (1 + edid->extensions) > len) ret = -EINVAL; else { connector->override_edid = false; ret = drm_mode_connector_update_edid_property(connector, edid); if (!ret) connector->override_edid = true; } kfree(buf); return (ret) ? ret : len; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Wood185100.00%1100.00%
Total185100.00%1100.00%

static const struct file_operations drm_edid_fops = { .owner = THIS_MODULE, .open = edid_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = edid_write }; static const struct file_operations drm_connector_fops = { .owner = THIS_MODULE, .open = connector_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = connector_write };
int drm_debugfs_connector_add(struct drm_connector *connector) { struct drm_minor *minor = connector->dev->primary; struct dentry *root, *ent; if (!minor->debugfs_root) return -1; root = debugfs_create_dir(connector->name, minor->debugfs_root); if (!root) return -ENOMEM; connector->debugfs_entry = root; /* force */ ent = debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector, &drm_connector_fops); if (!ent) goto error; /* edid */ ent = debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector, &drm_edid_fops); if (!ent) goto error; return 0; error: debugfs_remove_recursive(connector->debugfs_entry); connector->debugfs_entry = NULL; return -ENOMEM; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Wood144100.00%2100.00%
Total144100.00%2100.00%


void drm_debugfs_connector_remove(struct drm_connector *connector) { if (!connector->debugfs_entry) return; debugfs_remove_recursive(connector->debugfs_entry); connector->debugfs_entry = NULL; }

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PersonTokensPropCommitsCommitProp
Thomas Wood31100.00%1100.00%
Total31100.00%1100.00%


int drm_debugfs_crtc_add(struct drm_crtc *crtc) { struct drm_minor *minor = crtc->dev->primary; struct dentry *root; char *name; name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index); if (!name) return -ENOMEM; root = debugfs_create_dir(name, minor->debugfs_root); kfree(name); if (!root) return -ENOMEM; crtc->debugfs_entry = root; if (drm_debugfs_crtc_crc_add(crtc)) goto error; return 0; error: drm_debugfs_crtc_remove(crtc); return -ENOMEM; }

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PersonTokensPropCommitsCommitProp
Tomeu Vizoso107100.00%1100.00%
Total107100.00%1100.00%


void drm_debugfs_crtc_remove(struct drm_crtc *crtc) { debugfs_remove_recursive(crtc->debugfs_entry); crtc->debugfs_entry = NULL; }

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Tomeu Vizoso23100.00%1100.00%
Total23100.00%1100.00%

#endif /* CONFIG_DEBUG_FS */

Overall Contributors

PersonTokensPropCommitsCommitProp
Thomas Wood80944.82%29.52%
Ben Gamari67337.29%14.76%
Tomeu Vizoso1307.20%14.76%
Noralf Trönnes703.88%14.76%
Marcin Ślusarz442.44%29.52%
Rob Clark351.94%14.76%
Jiri Slaby160.89%14.76%
Daniel Vetter60.33%29.52%
Eric Anholt40.22%14.76%
GeunSik Lim30.17%14.76%
Paul Gortmaker30.17%14.76%
Emil Velikov30.17%14.76%
Damien Lespiau30.17%29.52%
Tejun Heo30.17%14.76%
David Howells10.06%14.76%
David Herrmann10.06%14.76%
Al Viro10.06%14.76%
Total1805100.00%21100.00%
Directory: drivers/gpu/drm
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