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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#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_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"
static struct dentry *accel_debugfs_root;static struct dentry *drm_debugfs_root;
/*************************************************** * 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 %*s %20s\n", "command", "tgid", "dev", "uid", "magic", DRM_CLIENT_NAME_MAX_LEN, "name", "id");
/* 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;
mutex_lock(&priv->client_name_lock); 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 %*s %20llu\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, DRM_CLIENT_NAME_MAX_LEN, priv->client_name ? priv->client_name : "<unset>", priv->client_id); rcu_read_unlock(); mutex_unlock(&priv->client_name_lock); } 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);
void drm_debugfs_bridge_params(void){ drm_bridge_debugfs_params(drm_debugfs_root);}
void drm_debugfs_init_root(void){ drm_debugfs_root = debugfs_create_dir("dri", NULL);#if IS_ENABLED(CONFIG_DRM_ACCEL) accel_debugfs_root = debugfs_create_dir("accel", NULL);#endif}
void drm_debugfs_remove_root(void){#if IS_ENABLED(CONFIG_DRM_ACCEL) debugfs_remove(accel_debugfs_root);#endif debugfs_remove(drm_debugfs_root);}
static int drm_debugfs_proc_info_show(struct seq_file *m, void *unused){ struct pid *pid; struct task_struct *task; struct drm_file *file = m->private;
if (!file) return -EINVAL;
rcu_read_lock(); pid = rcu_dereference(file->pid); task = pid_task(pid, PIDTYPE_TGID);
seq_printf(m, "pid: %d\n", task ? task->pid : 0); seq_printf(m, "comm: %s\n", task ? task->comm : "Unset"); rcu_read_unlock(); return 0;}
static int drm_debufs_proc_info_open(struct inode *inode, struct file *file){ return single_open(file, drm_debugfs_proc_info_show, inode->i_private);}
static const struct file_operations drm_debugfs_proc_info_fops = { .owner = THIS_MODULE, .open = drm_debufs_proc_info_open, .read = seq_read, .llseek = seq_lseek, .release = single_release,};
/** * drm_debugfs_clients_add - Add a per client debugfs directory * @file: drm_file for a client * * Create the debugfs directory for each client. This will be used to populate * driver specific data for each client. * * Also add the process information debugfs file for each client to tag * which client belongs to which process. */void drm_debugfs_clients_add(struct drm_file *file){ char *client;
client = kasprintf(GFP_KERNEL, "client-%llu", file->client_id); if (!client) return;
/* Create a debugfs directory for the client in root on drm debugfs */ file->debugfs_client = debugfs_create_dir(client, drm_debugfs_root); kfree(client);
debugfs_create_file("proc_info", 0444, file->debugfs_client, file, &drm_debugfs_proc_info_fops);
client = kasprintf(GFP_KERNEL, "../%s", file->minor->dev->unique); if (!client) return;
/* Create a link from client_id to the drm device this client id belongs to */ debugfs_create_symlink("device", file->debugfs_client, client); kfree(client);}
/** * drm_debugfs_clients_remove - removes all debugfs directories and files * @file: drm_file for a client * * Removes the debugfs directories recursively from the client directory. * * There is also a possibility that debugfs files are open while the drm_file * is released. */void drm_debugfs_clients_remove(struct drm_file *file){ debugfs_remove_recursive(file->debugfs_client); file->debugfs_client = NULL;}
/** * drm_debugfs_dev_init - create debugfs directory for the device * @dev: the device which we want to create the directory for * * Creates the debugfs directory for the device under the given root directory. */void drm_debugfs_dev_init(struct drm_device *dev){ if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL)) dev->debugfs_root = debugfs_create_dir(dev->unique, accel_debugfs_root); else dev->debugfs_root = debugfs_create_dir(dev->unique, drm_debugfs_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 drm_device *dev = minor->dev; char name[64];
sprintf(name, "%d", minor_id); minor->debugfs_symlink = debugfs_create_symlink(name, drm_debugfs_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};
static ssize_taudio_infoframe_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos){ struct drm_connector_hdmi_infoframe *infoframe; struct drm_connector *connector; union hdmi_infoframe *frame; u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)]; ssize_t len = 0;
connector = filp->private_data; mutex_lock(&connector->hdmi.infoframes.lock);
infoframe = &connector->hdmi.infoframes.audio; if (!infoframe->set) goto out;
frame = &infoframe->data; len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); if (len < 0) goto out;
len = simple_read_from_buffer(ubuf, count, ppos, buf, len);
out: mutex_unlock(&connector->hdmi.infoframes.lock); return len;}
static const struct file_operations audio_infoframe_fops = { .owner = THIS_MODULE, .open = simple_open, .read = audio_infoframe_read,};
static int create_hdmi_audio_infoframe_file(struct drm_connector *connector, struct dentry *parent){ struct dentry *file;
if (!connector->hdmi.funcs || !connector->hdmi.funcs->audio.write_infoframe) return 0;
file = debugfs_create_file("audio", 0400, parent, connector, &audio_infoframe_fops); if (IS_ERR(file)) return PTR_ERR(file);
return 0;}
#define DEFINE_INFOFRAME_FILE(_f) \static ssize_t _f##_read_infoframe(struct file *filp, \ char __user *ubuf, \ size_t count, \ loff_t *ppos) \{ \ struct drm_connector_hdmi_infoframe *infoframe; \ struct drm_connector_state *conn_state; \ struct drm_connector *connector; \ union hdmi_infoframe *frame; \ struct drm_device *dev; \ u8 buf[HDMI_INFOFRAME_SIZE(MAX)]; \ ssize_t len = 0; \ \ connector = filp->private_data; \ dev = connector->dev; \ \ drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); \ \ conn_state = connector->state; \ infoframe = &conn_state->hdmi.infoframes._f; \ if (!infoframe->set) \ goto out; \ \ frame = &infoframe->data; \ len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); \ if (len < 0) \ goto out; \ \ len = simple_read_from_buffer(ubuf, count, ppos, buf, len); \ \out: \ drm_modeset_unlock(&dev->mode_config.connection_mutex); \ return len; \} \\static const struct file_operations _f##_infoframe_fops = { \ .owner = THIS_MODULE, \ .open = simple_open, \ .read = _f##_read_infoframe, \}; \\static int create_hdmi_## _f ## _infoframe_file(struct drm_connector *connector, \ struct dentry *parent) \{ \ struct dentry *file; \ \ if (!connector->hdmi.funcs || \ !connector->hdmi.funcs->_f.write_infoframe) \ return 0; \ file = debugfs_create_file(#_f, 0400, parent, connector, &_f ## _infoframe_fops); \ if (IS_ERR(file)) \ return PTR_ERR(file); \ \ return 0; \}
DEFINE_INFOFRAME_FILE(avi);DEFINE_INFOFRAME_FILE(hdmi);DEFINE_INFOFRAME_FILE(hdr_drm);DEFINE_INFOFRAME_FILE(spd);
static int create_hdmi_infoframe_files(struct drm_connector *connector, struct dentry *parent){ int ret;
ret = create_hdmi_audio_infoframe_file(connector, parent); if (ret) return ret;
ret = create_hdmi_avi_infoframe_file(connector, parent); if (ret) return ret;
ret = create_hdmi_hdmi_infoframe_file(connector, parent); if (ret) return ret;
ret = create_hdmi_hdr_drm_infoframe_file(connector, parent); if (ret) return ret;
ret = create_hdmi_spd_infoframe_file(connector, parent); if (ret) return ret;
return 0;}
static void hdmi_debugfs_add(struct drm_connector *connector){ struct dentry *dir;
if (!(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA || connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)) return;
dir = debugfs_create_dir("infoframes", connector->debugfs_entry); if (IS_ERR(dir)) return;
create_hdmi_infoframe_files(connector, dir);}
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);
hdmi_debugfs_add(connector);
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;}
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;
drm_bridge_debugfs_encoder_params(root, encoder);
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;}