| /* |
| * 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/export.h> |
| #include <linux/seq_file.h> |
| #include <linux/slab.h> |
| #include <linux/uaccess.h> |
| |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_auth.h> |
| #include <drm/drm_client.h> |
| #include <drm/drm_debugfs.h> |
| #include <drm/drm_device.h> |
| #include <drm/drm_drv.h> |
| #include <drm/drm_edid.h> |
| #include <drm/drm_file.h> |
| #include <drm/drm_gem.h> |
| |
| #include "drm_crtc_internal.h" |
| #include "drm_internal.h" |
| |
| #if defined(CONFIG_DEBUG_FS) |
| |
| /*************************************************** |
| * Initialization, etc. |
| **************************************************/ |
| |
| static int drm_name_info(struct seq_file *m, void *data) |
| { |
| struct drm_info_node *node = (struct drm_info_node *) m->private; |
| struct drm_minor *minor = node->minor; |
| struct drm_device *dev = minor->dev; |
| struct drm_master *master; |
| |
| mutex_lock(&dev->master_mutex); |
| master = dev->master; |
| seq_printf(m, "%s", dev->driver->name); |
| if (dev->dev) |
| seq_printf(m, " dev=%s", dev_name(dev->dev)); |
| if (master && master->unique) |
| seq_printf(m, " master=%s", master->unique); |
| if (dev->unique) |
| seq_printf(m, " unique=%s", dev->unique); |
| seq_printf(m, "\n"); |
| mutex_unlock(&dev->master_mutex); |
| |
| return 0; |
| } |
| |
| static int drm_clients_info(struct seq_file *m, void *data) |
| { |
| struct drm_info_node *node = (struct drm_info_node *) m->private; |
| struct drm_device *dev = node->minor->dev; |
| struct drm_file *priv; |
| kuid_t uid; |
| |
| seq_printf(m, |
| "%20s %5s %3s master a %5s %10s\n", |
| "command", |
| "pid", |
| "dev", |
| "uid", |
| "magic"); |
| |
| /* dev->filelist is sorted youngest first, but we want to present |
| * oldest first (i.e. kernel, servers, clients), so walk backwardss. |
| */ |
| mutex_lock(&dev->filelist_mutex); |
| list_for_each_entry_reverse(priv, &dev->filelist, lhead) { |
| struct task_struct *task; |
| |
| rcu_read_lock(); /* locks pid_task()->comm */ |
| task = pid_task(priv->pid, PIDTYPE_PID); |
| uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID; |
| seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n", |
| task ? task->comm : "<unknown>", |
| pid_vnr(priv->pid), |
| priv->minor->index, |
| drm_is_current_master(priv) ? 'y' : 'n', |
| priv->authenticated ? 'y' : 'n', |
| from_kuid_munged(seq_user_ns(m), uid), |
| priv->magic); |
| rcu_read_unlock(); |
| } |
| mutex_unlock(&dev->filelist_mutex); |
| return 0; |
| } |
| |
| static int drm_gem_one_name_info(int id, void *ptr, void *data) |
| { |
| struct drm_gem_object *obj = ptr; |
| struct seq_file *m = data; |
| |
| seq_printf(m, "%6d %8zd %7d %8d\n", |
| obj->name, obj->size, |
| obj->handle_count, |
| kref_read(&obj->refcount)); |
| return 0; |
| } |
| |
| static int drm_gem_name_info(struct seq_file *m, void *data) |
| { |
| struct drm_info_node *node = (struct drm_info_node *) m->private; |
| struct drm_device *dev = node->minor->dev; |
| |
| seq_printf(m, " name size handles refcount\n"); |
| |
| mutex_lock(&dev->object_name_lock); |
| idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m); |
| mutex_unlock(&dev->object_name_lock); |
| |
| return 0; |
| } |
| |
| 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); |
| } |
| |
| |
| static const struct file_operations drm_debugfs_fops = { |
| .owner = THIS_MODULE, |
| .open = drm_debugfs_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| |
| /** |
| * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM |
| * minor |
| * @files: The array of files to create |
| * @count: The number of files given |
| * @root: DRI debugfs dir entry. |
| * @minor: device minor number |
| * |
| * Create a given set of debugfs files represented by an array of |
| * &struct 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 drm_info_node *tmp; |
| int i; |
| |
| 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) |
| continue; |
| |
| tmp->minor = minor; |
| tmp->dent = debugfs_create_file(files[i].name, |
| S_IFREG | S_IRUGO, root, tmp, |
| &drm_debugfs_fops); |
| tmp->info_ent = &files[i]; |
| |
| mutex_lock(&minor->debugfs_lock); |
| list_add(&tmp->list, &minor->debugfs_list); |
| mutex_unlock(&minor->debugfs_lock); |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_debugfs_create_files); |
| |
| 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); |
| |
| 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_drv_uses_atomic_modeset(dev)) { |
| ret = drm_atomic_debugfs_init(minor); |
| if (ret) { |
| DRM_ERROR("Failed to create atomic debugfs files\n"); |
| return ret; |
| } |
| } |
| |
| if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| ret = drm_framebuffer_debugfs_init(minor); |
| if (ret) { |
| DRM_ERROR("Failed to create framebuffer debugfs file\n"); |
| return ret; |
| } |
| |
| ret = drm_client_debugfs_init(minor); |
| if (ret) { |
| DRM_ERROR("Failed to create client debugfs file\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; |
| } |
| |
| |
| 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; |
| } |
| 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); |
| } |
| |
| void drm_debugfs_cleanup(struct drm_minor *minor) |
| { |
| if (!minor->debugfs_root) |
| return; |
| |
| drm_debugfs_remove_all_files(minor); |
| |
| debugfs_remove_recursive(minor->debugfs_root); |
| minor->debugfs_root = NULL; |
| } |
| |
| static int connector_show(struct seq_file *m, void *data) |
| { |
| struct drm_connector *connector = m->private; |
| |
| seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force)); |
| |
| return 0; |
| } |
| |
| static int connector_open(struct inode *inode, struct file *file) |
| { |
| struct drm_connector *dev = inode->i_private; |
| |
| return single_open(file, connector_show, dev); |
| } |
| |
| 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 (sysfs_streq(buf, "on")) |
| connector->force = DRM_FORCE_ON; |
| else if (sysfs_streq(buf, "digital")) |
| connector->force = DRM_FORCE_ON_DIGITAL; |
| else if (sysfs_streq(buf, "off")) |
| connector->force = DRM_FORCE_OFF; |
| else if (sysfs_streq(buf, "unspecified")) |
| connector->force = DRM_FORCE_UNSPECIFIED; |
| else |
| return -EINVAL; |
| |
| return len; |
| } |
| |
| 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; |
| } |
| |
| static int edid_open(struct inode *inode, struct file *file) |
| { |
| struct drm_connector *dev = inode->i_private; |
| |
| return single_open(file, edid_show, dev); |
| } |
| |
| 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_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_connector_update_edid_property(connector, edid); |
| if (!ret) |
| connector->override_edid = true; |
| } |
| |
| kfree(buf); |
| |
| return (ret) ? ret : len; |
| } |
| |
| 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 |
| }; |
| |
| void drm_debugfs_connector_add(struct drm_connector *connector) |
| { |
| struct drm_minor *minor = connector->dev->primary; |
| struct dentry *root; |
| |
| if (!minor->debugfs_root) |
| return; |
| |
| root = debugfs_create_dir(connector->name, minor->debugfs_root); |
| connector->debugfs_entry = root; |
| |
| /* force */ |
| debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector, |
| &drm_connector_fops); |
| |
| /* edid */ |
| debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector, |
| &drm_edid_fops); |
| } |
| |
| void drm_debugfs_connector_remove(struct drm_connector *connector) |
| { |
| if (!connector->debugfs_entry) |
| return; |
| |
| debugfs_remove_recursive(connector->debugfs_entry); |
| |
| connector->debugfs_entry = NULL; |
| } |
| |
| void 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; |
| |
| root = debugfs_create_dir(name, minor->debugfs_root); |
| kfree(name); |
| |
| crtc->debugfs_entry = root; |
| |
| drm_debugfs_crtc_crc_add(crtc); |
| } |
| |
| void drm_debugfs_crtc_remove(struct drm_crtc *crtc) |
| { |
| debugfs_remove_recursive(crtc->debugfs_entry); |
| crtc->debugfs_entry = NULL; |
| } |
| |
| #endif /* CONFIG_DEBUG_FS */ |