| /* |
| * 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_bridge.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/drm_managed.h> |
| #include <drm/drm_gpuvm.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_debugfs_entry *entry = m->private; |
| struct drm_device *dev = entry->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_debugfs_entry *entry = m->private; |
| struct drm_device *dev = entry->dev; |
| struct drm_file *priv; |
| kuid_t uid; |
| |
| seq_printf(m, |
| "%20s %5s %3s master a %5s %10s\n", |
| "command", |
| "tgid", |
| "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) { |
| bool is_current_master = drm_is_current_master(priv); |
| struct task_struct *task; |
| struct pid *pid; |
| |
| rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */ |
| pid = rcu_dereference(priv->pid); |
| task = pid_task(pid, PIDTYPE_TGID); |
| 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(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_debugfs_entry *entry = m->private; |
| struct drm_device *dev = entry->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_debugfs_info 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; |
| |
| if (!device_is_registered(node->minor->kdev)) |
| return -ENODEV; |
| |
| return single_open(file, node->info_ent->show, node); |
| } |
| |
| static int drm_debugfs_entry_open(struct inode *inode, struct file *file) |
| { |
| struct drm_debugfs_entry *entry = inode->i_private; |
| struct drm_debugfs_info *node = &entry->file; |
| struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel; |
| |
| if (!device_is_registered(minor->kdev)) |
| return -ENODEV; |
| |
| return single_open(file, node->show, entry); |
| } |
| |
| static const struct file_operations drm_debugfs_entry_fops = { |
| .owner = THIS_MODULE, |
| .open = drm_debugfs_entry_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| 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_gpuva_info - dump the given DRM GPU VA space |
| * @m: pointer to the &seq_file to write |
| * @gpuvm: the &drm_gpuvm representing the GPU VA space |
| * |
| * Dumps the GPU VA mappings of a given DRM GPU VA manager. |
| * |
| * For each DRM GPU VA space drivers should call this function from their |
| * &drm_info_list's show callback. |
| * |
| * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized |
| */ |
| int drm_debugfs_gpuva_info(struct seq_file *m, |
| struct drm_gpuvm *gpuvm) |
| { |
| struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node; |
| |
| if (!gpuvm->name) |
| return -ENODEV; |
| |
| seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n", |
| gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range); |
| seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n", |
| kva->va.addr, kva->va.addr + kva->va.range); |
| seq_puts(m, "\n"); |
| seq_puts(m, " VAs | start | range | end | object | object offset\n"); |
| seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n"); |
| drm_gpuvm_for_each_va(va, gpuvm) { |
| if (unlikely(va == kva)) |
| continue; |
| |
| seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n", |
| va->va.addr, va->va.range, va->va.addr + va->va.range, |
| (u64)(uintptr_t)va->gem.obj, va->gem.offset); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_debugfs_gpuva_info); |
| |
| /** |
| * 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_dev_fini(). |
| */ |
| 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 = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL); |
| if (tmp == NULL) |
| continue; |
| |
| tmp->minor = minor; |
| tmp->dent = debugfs_create_file(files[i].name, |
| 0444, root, tmp, |
| &drm_debugfs_fops); |
| tmp->info_ent = &files[i]; |
| } |
| } |
| EXPORT_SYMBOL(drm_debugfs_create_files); |
| |
| int drm_debugfs_remove_files(const struct drm_info_list *files, int count, |
| struct dentry *root, struct drm_minor *minor) |
| { |
| int i; |
| |
| for (i = 0; i < count; i++) { |
| struct dentry *dent = debugfs_lookup(files[i].name, root); |
| |
| if (!dent) |
| continue; |
| |
| drmm_kfree(minor->dev, d_inode(dent)->i_private); |
| debugfs_remove(dent); |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_debugfs_remove_files); |
| |
| /** |
| * drm_debugfs_dev_init - create debugfs directory for the device |
| * @dev: the device which we want to create the directory for |
| * @root: the parent directory depending on the device type |
| * |
| * Creates the debugfs directory for the device under the given root directory. |
| */ |
| void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root) |
| { |
| dev->debugfs_root = debugfs_create_dir(dev->unique, root); |
| } |
| |
| /** |
| * drm_debugfs_dev_fini - cleanup debugfs directory |
| * @dev: the device to cleanup the debugfs stuff |
| * |
| * Remove the debugfs directory, might be called multiple times. |
| */ |
| void drm_debugfs_dev_fini(struct drm_device *dev) |
| { |
| debugfs_remove_recursive(dev->debugfs_root); |
| dev->debugfs_root = NULL; |
| } |
| |
| void drm_debugfs_dev_register(struct drm_device *dev) |
| { |
| drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES); |
| |
| if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| drm_framebuffer_debugfs_init(dev); |
| drm_client_debugfs_init(dev); |
| } |
| if (drm_drv_uses_atomic_modeset(dev)) |
| drm_atomic_debugfs_init(dev); |
| } |
| |
| int drm_debugfs_register(struct drm_minor *minor, int minor_id, |
| struct dentry *root) |
| { |
| struct drm_device *dev = minor->dev; |
| char name[64]; |
| |
| sprintf(name, "%d", minor_id); |
| minor->debugfs_symlink = debugfs_create_symlink(name, root, |
| dev->unique); |
| |
| /* TODO: Only for compatibility with drivers */ |
| minor->debugfs_root = dev->debugfs_root; |
| |
| if (dev->driver->debugfs_init && dev->render != minor) |
| dev->driver->debugfs_init(minor); |
| |
| return 0; |
| } |
| |
| void drm_debugfs_unregister(struct drm_minor *minor) |
| { |
| debugfs_remove(minor->debugfs_symlink); |
| minor->debugfs_symlink = NULL; |
| } |
| |
| /** |
| * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list |
| * @dev: drm device for the ioctl |
| * @name: debugfs file name |
| * @show: show callback |
| * @data: driver-private data, should not be device-specific |
| * |
| * Add a given file entry to the DRM device debugfs file list to be created on |
| * drm_debugfs_init. |
| */ |
| void drm_debugfs_add_file(struct drm_device *dev, const char *name, |
| int (*show)(struct seq_file*, void*), void *data) |
| { |
| struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL); |
| |
| if (!entry) |
| return; |
| |
| entry->file.name = name; |
| entry->file.show = show; |
| entry->file.data = data; |
| entry->dev = dev; |
| |
| debugfs_create_file(name, 0444, dev->debugfs_root, entry, |
| &drm_debugfs_entry_fops); |
| } |
| EXPORT_SYMBOL(drm_debugfs_add_file); |
| |
| /** |
| * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list |
| * @dev: drm device for the ioctl |
| * @files: The array of files to create |
| * @count: The number of files given |
| * |
| * Add a given set of debugfs files represented by an array of |
| * &struct drm_debugfs_info in the DRM device debugfs file list. |
| */ |
| void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count) |
| { |
| int i; |
| |
| for (i = 0; i < count; i++) |
| drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data); |
| } |
| EXPORT_SYMBOL(drm_debugfs_add_files); |
| |
| 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) |
| { |
| return drm_edid_override_show(m->private, m); |
| } |
| |
| 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_device *dev = connector->dev; |
| struct dentry *root; |
| |
| if (!dev->debugfs_root) |
| return; |
| |
| root = debugfs_create_dir(connector->name, dev->debugfs_root); |
| connector->debugfs_entry = root; |
| |
| /* force */ |
| debugfs_create_file("force", 0644, root, connector, |
| &drm_connector_fops); |
| |
| /* edid */ |
| debugfs_create_file("edid_override", 0644, root, connector, |
| &drm_edid_fops); |
| |
| /* vrr range */ |
| debugfs_create_file("vrr_range", 0444, 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_device *dev = crtc->dev; |
| struct dentry *root; |
| char *name; |
| |
| name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index); |
| if (!name) |
| return; |
| |
| root = debugfs_create_dir(name, dev->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; |
| } |
| |
| static int bridges_show(struct seq_file *m, void *data) |
| { |
| struct drm_encoder *encoder = m->private; |
| struct drm_printer p = drm_seq_file_printer(m); |
| struct drm_bridge *bridge; |
| unsigned int idx = 0; |
| |
| drm_for_each_bridge_in_chain(encoder, bridge) { |
| drm_printf(&p, "bridge[%d]: %ps\n", idx++, bridge->funcs); |
| drm_printf(&p, "\ttype: [%d] %s\n", |
| bridge->type, |
| drm_get_connector_type_name(bridge->type)); |
| #ifdef CONFIG_OF |
| if (bridge->of_node) |
| drm_printf(&p, "\tOF: %pOFfc\n", bridge->of_node); |
| #endif |
| drm_printf(&p, "\tops: [0x%x]", bridge->ops); |
| if (bridge->ops & DRM_BRIDGE_OP_DETECT) |
| drm_puts(&p, " detect"); |
| if (bridge->ops & DRM_BRIDGE_OP_EDID) |
| drm_puts(&p, " edid"); |
| if (bridge->ops & DRM_BRIDGE_OP_HPD) |
| drm_puts(&p, " hpd"); |
| if (bridge->ops & DRM_BRIDGE_OP_MODES) |
| drm_puts(&p, " modes"); |
| drm_puts(&p, "\n"); |
| } |
| |
| return 0; |
| } |
| DEFINE_SHOW_ATTRIBUTE(bridges); |
| |
| void drm_debugfs_encoder_add(struct drm_encoder *encoder) |
| { |
| struct drm_minor *minor = encoder->dev->primary; |
| struct dentry *root; |
| char *name; |
| |
| name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index); |
| if (!name) |
| return; |
| |
| root = debugfs_create_dir(name, minor->debugfs_root); |
| kfree(name); |
| |
| encoder->debugfs_entry = root; |
| |
| /* bridges list */ |
| debugfs_create_file("bridges", 0444, root, encoder, |
| &bridges_fops); |
| |
| if (encoder->funcs && encoder->funcs->debugfs_init) |
| encoder->funcs->debugfs_init(encoder, root); |
| } |
| |
| void drm_debugfs_encoder_remove(struct drm_encoder *encoder) |
| { |
| debugfs_remove_recursive(encoder->debugfs_entry); |
| encoder->debugfs_entry = NULL; |
| } |
| |
| #endif /* CONFIG_DEBUG_FS */ |