/* * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com * * Copyright 2008 Ben Gamari * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #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; bool is_current_master = drm_is_current_master(priv); 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 : "", pid_vnr(priv->pid), priv->minor->index, is_current_master ? '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(). */ void 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 && !drm_core_check_all_features(dev, 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); } } 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]; INIT_LIST_HEAD(&minor->debugfs_list); rw_init(&minor->debugfs_lock, "dbgfs"); sprintf(name, "%d", minor_id); minor->debugfs_root = debugfs_create_dir(name, root); drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor->debugfs_root, minor); if (drm_drv_uses_atomic_modeset(dev)) { drm_atomic_debugfs_init(minor); } if (drm_core_check_feature(dev, DRIVER_MODESET)) { drm_framebuffer_debugfs_init(minor); drm_client_debugfs_init(minor); } if (dev->driver->debugfs_init) dev->driver->debugfs_init(minor); 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; } /* * Returns the min and max vrr vfreq through the connector's debugfs file. * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range */ static int vrr_range_show(struct seq_file *m, void *data) { struct drm_connector *connector = m->private; if (connector->status != connector_status_connected) return -ENODEV; seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq); seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq); return 0; } DEFINE_SHOW_ATTRIBUTE(vrr_range); 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); /* vrr range */ debugfs_create_file("vrr_range", S_IRUGO, root, connector, &vrr_range_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 */