From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/drm_debugfs.c | 488 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 488 insertions(+) create mode 100644 drivers/gpu/drm/drm_debugfs.c (limited to 'drivers/gpu/drm/drm_debugfs.c') diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c new file mode 100644 index 000000000..01ee3febb --- /dev/null +++ b/drivers/gpu/drm/drm_debugfs.c @@ -0,0 +1,488 @@ +/* + * 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); + mutex_init(&minor->debugfs_lock); + 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; + int ret; + + buf = memdup_user(ubuf, len); + if (IS_ERR(buf)) + return PTR_ERR(buf); + + if (len == 5 && !strncmp(buf, "reset", 5)) + ret = drm_edid_override_reset(connector); + else + ret = drm_edid_override_set(connector, buf, len); + + 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", connector->display_info.monitor_range.min_vfreq); + seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(vrr_range); + +/* + * Returns Connector's max supported bpc through debugfs file. + * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc + */ +static int output_bpc_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + + if (connector->status != connector_status_connected) + return -ENODEV; + + seq_printf(m, "Maximum: %u\n", connector->display_info.bpc); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(output_bpc); + +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); + + /* max bpc */ + debugfs_create_file("output_bpc", 0444, root, connector, + &output_bpc_fops); + + if (connector->funcs->debugfs_init) + connector->funcs->debugfs_init(connector, root); +} + +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 */ -- cgit v1.2.3