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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#ifndef _DRM_FILE_H_#define _DRM_FILE_H_
#include <linux/types.h>#include <linux/completion.h>#include <linux/idr.h>#include <linux/xarray.h>
#include <uapi/drm/drm.h>
#include <drm/drm_prime.h>
struct dma_fence;struct drm_file;struct drm_device;struct drm_printer;struct device;struct file;
extern struct xarray drm_minors_xa;
/* * FIXME: Not sure we want to have drm_minor here in the end, but to avoid * header include loops we need it here for now. */
/* Note that the values of this enum are ABI (it determines * /dev/dri/renderD* numbers). * * Setting DRM_MINOR_ACCEL to 32 gives enough space for more drm minors to * be implemented before we hit any future */enum drm_minor_type { DRM_MINOR_PRIMARY = 0, DRM_MINOR_CONTROL = 1, DRM_MINOR_RENDER = 2, DRM_MINOR_ACCEL = 32,};
/** * struct drm_minor - DRM device minor structure * * This structure represents a DRM minor number for device nodes in /dev. * Entirely opaque to drivers and should never be inspected directly by drivers. * Drivers instead should only interact with &struct drm_file and of course * &struct drm_device, which is also where driver-private data and resources can * be attached to. */struct drm_minor { /* private: */ int index; /* Minor device number */ int type; /* Control or render or accel */ struct device *kdev; /* Linux device */ struct drm_device *dev;
struct dentry *debugfs_symlink; struct dentry *debugfs_root;};
/** * struct drm_pending_event - Event queued up for userspace to read * * This represents a DRM event. Drivers can use this as a generic completion * mechanism, which supports kernel-internal &struct completion, &struct dma_fence * and also the DRM-specific &struct drm_event delivery mechanism. */struct drm_pending_event { /** * @completion: * * Optional pointer to a kernel internal completion signalled when * drm_send_event() is called, useful to internally synchronize with * nonblocking operations. */ struct completion *completion;
/** * @completion_release: * * Optional callback currently only used by the atomic modeset helpers * to clean up the reference count for the structure @completion is * stored in. */ void (*completion_release)(struct completion *completion);
/** * @event: * * Pointer to the actual event that should be sent to userspace to be * read using drm_read(). Can be optional, since nowadays events are * also used to signal kernel internal threads with @completion or DMA * transactions using @fence. */ struct drm_event *event;
/** * @fence: * * Optional DMA fence to unblock other hardware transactions which * depend upon the nonblocking DRM operation this event represents. */ struct dma_fence *fence;
/** * @file_priv: * * &struct drm_file where @event should be delivered to. Only set when * @event is set. */ struct drm_file *file_priv;
/** * @link: * * Double-linked list to keep track of this event. Can be used by the * driver up to the point when it calls drm_send_event(), after that * this list entry is owned by the core for its own book-keeping. */ struct list_head link;
/** * @pending_link: * * Entry on &drm_file.pending_event_list, to keep track of all pending * events for @file_priv, to allow correct unwinding of them when * userspace closes the file before the event is delivered. */ struct list_head pending_link;};
/** * struct drm_file - DRM file private data * * This structure tracks DRM state per open file descriptor. */struct drm_file { /** * @authenticated: * * Whether the client is allowed to submit rendering, which for legacy * nodes means it must be authenticated. * * See also the :ref:`section on primary nodes and authentication * <drm_primary_node>`. */ bool authenticated;
/** * @stereo_allowed: * * True when the client has asked us to expose stereo 3D mode flags. */ bool stereo_allowed;
/** * @universal_planes: * * True if client understands CRTC primary planes and cursor planes * in the plane list. Automatically set when @atomic is set. */ bool universal_planes;
/** @atomic: True if client understands atomic properties. */ bool atomic;
/** * @aspect_ratio_allowed: * * True, if client can handle picture aspect ratios, and has requested * to pass this information along with the mode. */ bool aspect_ratio_allowed;
/** * @writeback_connectors: * * True if client understands writeback connectors */ bool writeback_connectors;
/** * @plane_color_pipeline: * * True if client understands plane color pipelines */ bool plane_color_pipeline;
/** * @was_master: * * This client has or had, master capability. Protected by struct * &drm_device.master_mutex. * * This is used to ensure that CAP_SYS_ADMIN is not enforced, if the * client is or was master in the past. */ bool was_master;
/** * @is_master: * * This client is the creator of @master. Protected by struct * &drm_device.master_mutex. * * See also the :ref:`section on primary nodes and authentication * <drm_primary_node>`. */ bool is_master;
/** * @supports_virtualized_cursor_plane: * * This client is capable of handling the cursor plane with the * restrictions imposed on it by the virtualized drivers. * * This implies that the cursor plane has to behave like a cursor * i.e. track cursor movement. It also requires setting of the * hotspot properties by the client on the cursor plane. */ bool supports_virtualized_cursor_plane;
/** * @master: * * Master this node is currently associated with. Protected by struct * &drm_device.master_mutex, and serialized by @master_lookup_lock. * * Only relevant if drm_is_primary_client() returns true. Note that * this only matches &drm_device.master if the master is the currently * active one. * * To update @master, both &drm_device.master_mutex and * @master_lookup_lock need to be held, therefore holding either of * them is safe and enough for the read side. * * When dereferencing this pointer, either hold struct * &drm_device.master_mutex for the duration of the pointer's use, or * use drm_file_get_master() if struct &drm_device.master_mutex is not * currently held and there is no other need to hold it. This prevents * @master from being freed during use. * * See also @authentication and @is_master and the :ref:`section on * primary nodes and authentication <drm_primary_node>`. */ struct drm_master *master;
/** @master_lookup_lock: Serializes @master. */ spinlock_t master_lookup_lock;
/** * @pid: Process that is using this file. * * Must only be dereferenced under a rcu_read_lock or equivalent. * * Updates are guarded with dev->filelist_mutex and reference must be * dropped after a RCU grace period to accommodate lockless readers. */ struct pid __rcu *pid;
/** @client_id: A unique id for fdinfo */ u64 client_id;
/** @magic: Authentication magic, see @authenticated. */ drm_magic_t magic;
/** * @lhead: * * List of all open files of a DRM device, linked into * &drm_device.filelist. Protected by &drm_device.filelist_mutex. */ struct list_head lhead;
/** @minor: &struct drm_minor for this file. */ struct drm_minor *minor;
/** * @object_idr: * * Mapping of mm object handles to object pointers. Used by the GEM * subsystem. Protected by @table_lock. * * Note that allocated entries might be NULL as a transient state when * creating or deleting a handle. */ struct idr object_idr;
/** @table_lock: Protects @object_idr. */ spinlock_t table_lock;
/** @syncobj_xa: Mapping of sync object handles to object pointers. */ struct xarray syncobj_xa;
/** @filp: Pointer to the core file structure. */ struct file *filp;
/** * @driver_priv: * * Optional pointer for driver private data. Can be allocated in * &drm_driver.open and should be freed in &drm_driver.postclose. */ void *driver_priv;
/** * @fbs: * * List of &struct drm_framebuffer associated with this file, using the * &drm_framebuffer.filp_head entry. * * Protected by @fbs_lock. Note that the @fbs list holds a reference on * the framebuffer object to prevent it from untimely disappearing. */ struct list_head fbs;
/** @fbs_lock: Protects @fbs. */ struct mutex fbs_lock;
/** * @blobs: * * User-created blob properties; this retains a reference on the * property. * * Protected by @drm_mode_config.blob_lock; */ struct list_head blobs;
/** @event_wait: Waitqueue for new events added to @event_list. */ wait_queue_head_t event_wait;
/** * @pending_event_list: * * List of pending &struct drm_pending_event, used to clean up pending * events in case this file gets closed before the event is signalled. * Uses the &drm_pending_event.pending_link entry. * * Protect by &drm_device.event_lock. */ struct list_head pending_event_list;
/** * @event_list: * * List of &struct drm_pending_event, ready for delivery to userspace * through drm_read(). Uses the &drm_pending_event.link entry. * * Protect by &drm_device.event_lock. */ struct list_head event_list;
/** * @event_space: * * Available event space to prevent userspace from * exhausting kernel memory. Currently limited to the fairly arbitrary * value of 4KB. */ int event_space;
/** @event_read_lock: Serializes drm_read(). */ struct mutex event_read_lock;
/** * @prime: * * Per-file buffer caches used by the PRIME buffer sharing code. */ struct drm_prime_file_private prime;
/** * @client_name: * * Userspace-provided name; useful for accounting and debugging. */ const char *client_name;
/** * @client_name_lock: Protects @client_name. */ struct mutex client_name_lock;
/** * @debugfs_client: * * debugfs directory for each client under a drm node. */ struct dentry *debugfs_client;};
/** * drm_is_primary_client - is this an open file of the primary node * @file_priv: DRM file * * Returns true if this is an open file of the primary node, i.e. * &drm_file.minor of @file_priv is a primary minor. * * See also the :ref:`section on primary nodes and authentication * <drm_primary_node>`. */static inline bool drm_is_primary_client(const struct drm_file *file_priv){ return file_priv->minor->type == DRM_MINOR_PRIMARY;}
/** * drm_is_render_client - is this an open file of the render node * @file_priv: DRM file * * Returns true if this is an open file of the render node, i.e. * &drm_file.minor of @file_priv is a render minor. * * See also the :ref:`section on render nodes <drm_render_node>`. */static inline bool drm_is_render_client(const struct drm_file *file_priv){ return file_priv->minor->type == DRM_MINOR_RENDER;}
/** * drm_is_accel_client - is this an open file of the compute acceleration node * @file_priv: DRM file * * Returns true if this is an open file of the compute acceleration node, i.e. * &drm_file.minor of @file_priv is a accel minor. * * See also :doc:`Introduction to compute accelerators subsystem * </accel/introduction>`. */static inline bool drm_is_accel_client(const struct drm_file *file_priv){ return file_priv->minor->type == DRM_MINOR_ACCEL;}
__printf(2, 3)void drm_file_err(struct drm_file *file_priv, const char *fmt, ...);
void drm_file_update_pid(struct drm_file *);
struct drm_minor *drm_minor_acquire(struct xarray *minors_xa, unsigned int minor_id);void drm_minor_release(struct drm_minor *minor);
int drm_open(struct inode *inode, struct file *filp);int drm_open_helper(struct file *filp, struct drm_minor *minor);ssize_t drm_read(struct file *filp, char __user *buffer, size_t count, loff_t *offset);int drm_release(struct inode *inode, struct file *filp);int drm_release_noglobal(struct inode *inode, struct file *filp);__poll_t drm_poll(struct file *filp, struct poll_table_struct *wait);int drm_event_reserve_init_locked(struct drm_device *dev, struct drm_file *file_priv, struct drm_pending_event *p, struct drm_event *e);int drm_event_reserve_init(struct drm_device *dev, struct drm_file *file_priv, struct drm_pending_event *p, struct drm_event *e);void drm_event_cancel_free(struct drm_device *dev, struct drm_pending_event *p);void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);void drm_send_event_timestamp_locked(struct drm_device *dev, struct drm_pending_event *e, ktime_t timestamp);
/** * struct drm_memory_stats - GEM object stats associated * @shared: Total size of GEM objects shared between processes * @private: Total size of GEM objects * @resident: Total size of GEM objects backing pages * @purgeable: Total size of GEM objects that can be purged (resident and not active) * @active: Total size of GEM objects active on one or more engines * * Used by drm_print_memory_stats() */struct drm_memory_stats { u64 shared; u64 private; u64 resident; u64 purgeable; u64 active;};
enum drm_gem_object_status;
int drm_memory_stats_is_zero(const struct drm_memory_stats *stats);void drm_fdinfo_print_size(struct drm_printer *p, const char *prefix, const char *stat, const char *region, u64 sz);void drm_print_memory_stats(struct drm_printer *p, const struct drm_memory_stats *stats, enum drm_gem_object_status supported_status, const char *region);
void drm_show_memory_stats(struct drm_printer *p, struct drm_file *file);void drm_show_fdinfo(struct seq_file *m, struct file *f);
struct file *mock_drm_getfile(struct drm_minor *minor, unsigned int flags);
#endif /* _DRM_FILE_H_ */