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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* Copyright (c) 2009-2010, Code Aurora Forum.
* Copyright 2016 Intel Corp.
* 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.
#ifndef _DRM_DRV_H_
#define _DRM_DRV_H_
#include <linux/list.h>
#include <linux/irqreturn.h>
struct drm_device;
struct drm_file;
struct drm_gem_object;
struct drm_master;
struct drm_minor;
struct dma_buf_attachment;
struct drm_display_mode;
struct drm_mode_create_dumb;
/* driver capabilities and requirements mask */
#define DRIVER_USE_AGP 0x1
#define DRIVER_LEGACY 0x2
#define DRIVER_PCI_DMA 0x8
#define DRIVER_SG 0x10
#define DRIVER_HAVE_DMA 0x20
#define DRIVER_HAVE_IRQ 0x40
#define DRIVER_IRQ_SHARED 0x80
#define DRIVER_GEM 0x1000
#define DRIVER_MODESET 0x2000
#define DRIVER_PRIME 0x4000
#define DRIVER_RENDER 0x8000
#define DRIVER_ATOMIC 0x10000
* struct drm_driver - DRM driver structure
* This structure represent the common code for a family of cards. There will
* one drm_device for each card present in this family. It contains lots of
* vfunc entries, and a pile of those probably should be moved to more
* appropriate places like &drm_mode_config_funcs or into a new operations
* structure for GEM drivers.
struct drm_driver {
* @load:
* Backward-compatible driver callback to complete
* initialization steps after the driver is registered. For
* this reason, may suffer from race conditions and its use is
* deprecated for new drivers. It is therefore only supported
* for existing drivers not yet converted to the new scheme.
* See drm_dev_init() and drm_dev_register() for proper and
* race-free way to set up a &struct drm_device.
* Returns:
* Zero on success, non-zero value on failure.
int (*load) (struct drm_device *, unsigned long flags);
int (*open) (struct drm_device *, struct drm_file *);
void (*preclose) (struct drm_device *, struct drm_file *file_priv);
void (*postclose) (struct drm_device *, struct drm_file *);
void (*lastclose) (struct drm_device *);
* @unload:
* Reverse the effects of the driver load callback. Ideally,
* the clean up performed by the driver should happen in the
* reverse order of the initialization. Similarly to the load
* hook, this handler is deprecated and its usage should be
* dropped in favor of an open-coded teardown function at the
* driver layer. See drm_dev_unregister() and drm_dev_unref()
* for the proper way to remove a &struct drm_device.
* The unload() hook is called right after unregistering
* the device.
void (*unload) (struct drm_device *);
* @release:
* Optional callback for destroying device data after the final
* reference is released, i.e. the device is being destroyed. Drivers
* using this callback are responsible for calling drm_dev_fini()
* to finalize the device and then freeing the struct themselves.
void (*release) (struct drm_device *);
int (*set_busid)(struct drm_device *dev, struct drm_master *master);
* @get_vblank_counter:
* Driver callback for fetching a raw hardware vblank counter for the
* CRTC specified with the pipe argument. If a device doesn't have a
* hardware counter, the driver can simply use
* drm_vblank_no_hw_counter() function. The DRM core will account for
* missed vblank events while interrupts where disabled based on system
* timestamps.
* Wraparound handling and loss of events due to modesetting is dealt
* with in the DRM core code, as long as drivers call
* drm_crtc_vblank_off() and drm_crtc_vblank_on() when disabling or
* enabling a CRTC.
* Returns:
* Raw vblank counter value.
u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe);
* @enable_vblank:
* Enable vblank interrupts for the CRTC specified with the pipe
* argument.
* Returns:
* Zero on success, appropriate errno if the given @crtc's vblank
* interrupt cannot be enabled.
int (*enable_vblank) (struct drm_device *dev, unsigned int pipe);
* @disable_vblank:
* Disable vblank interrupts for the CRTC specified with the pipe
* argument.
void (*disable_vblank) (struct drm_device *dev, unsigned int pipe);
* @get_scanout_position:
* Called by vblank timestamping code.
* Returns the current display scanout position from a crtc, and an
* optional accurate ktime_get() timestamp of when position was
* measured. Note that this is a helper callback which is only used if a
* driver uses drm_calc_vbltimestamp_from_scanoutpos() for the
* @get_vblank_timestamp callback.
* Parameters:
* dev:
* DRM device.
* pipe:
* Id of the crtc to query.
* flags:
* Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
* vpos:
* Target location for current vertical scanout position.
* hpos:
* Target location for current horizontal scanout position.
* stime:
* Target location for timestamp taken immediately before
* scanout position query. Can be NULL to skip timestamp.
* etime:
* Target location for timestamp taken immediately after
* scanout position query. Can be NULL to skip timestamp.
* mode:
* Current display timings.
* Returns vpos as a positive number while in active scanout area.
* Returns vpos as a negative number inside vblank, counting the number
* of scanlines to go until end of vblank, e.g., -1 means "one scanline
* until start of active scanout / end of vblank."
* Returns:
* Flags, or'ed together as follows:
* Query successful.
* Inside vblank.
* DRM_SCANOUTPOS_ACCURATE: Returned position is accurate. A lack of
* this flag means that returned position may be offset by a
* constant but unknown small number of scanlines wrt. real scanout
* position.
int (*get_scanout_position) (struct drm_device *dev, unsigned int pipe,
unsigned int flags, int *vpos, int *hpos,
ktime_t *stime, ktime_t *etime,
const struct drm_display_mode *mode);
* @get_vblank_timestamp:
* Called by drm_get_last_vbltimestamp(). Should return a precise
* timestamp when the most recent VBLANK interval ended or will end.
* Specifically, the timestamp in @vblank_time should correspond as
* closely as possible to the time when the first video scanline of
* the video frame after the end of VBLANK will start scanning out,
* the time immediately after end of the VBLANK interval. If the
* @crtc is currently inside VBLANK, this will be a time in the future.
* If the @crtc is currently scanning out a frame, this will be the
* past start time of the current scanout. This is meant to adhere
* to the OpenML OML_sync_control extension specification.
* Paramters:
* dev:
* dev DRM device handle.
* pipe:
* crtc for which timestamp should be returned.
* max_error:
* Maximum allowable timestamp error in nanoseconds.
* Implementation should strive to provide timestamp
* with an error of at most max_error nanoseconds.
* Returns true upper bound on error for timestamp.
* vblank_time:
* Target location for returned vblank timestamp.
* flags:
* 0 = Defaults, no special treatment needed.
* DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
* irq handler. Some drivers need to apply some workarounds
* for gpu-specific vblank irq quirks if flag is set.
* Returns:
* Zero if timestamping isn't supported in current display mode or a
* negative number on failure. A positive status code on success,
* which describes how the vblank_time timestamp was computed.
int (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe,
int *max_error,
struct timeval *vblank_time,
unsigned flags);
/* these have to be filled in */
irqreturn_t(*irq_handler) (int irq, void *arg);
void (*irq_preinstall) (struct drm_device *dev);
int (*irq_postinstall) (struct drm_device *dev);
void (*irq_uninstall) (struct drm_device *dev);
* @master_create:
* Called whenever a new master is created. Only used by vmwgfx.
int (*master_create)(struct drm_device *dev, struct drm_master *master);
* @master_destroy:
* Called whenever a master is destroyed. Only used by vmwgfx.
void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
* @master_set:
* Called whenever the minor master is set. Only used by vmwgfx.
int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
bool from_open);
* @master_drop:
* Called whenever the minor master is dropped. Only used by vmwgfx.
void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
int (*debugfs_init)(struct drm_minor *minor);
void (*debugfs_cleanup)(struct drm_minor *minor);
* @gem_free_object: deconstructor for drm_gem_objects
* This is deprecated and should not be used by new drivers. Use
* @gem_free_object_unlocked instead.
void (*gem_free_object) (struct drm_gem_object *obj);
* @gem_free_object_unlocked: deconstructor for drm_gem_objects
* This is for drivers which are not encumbered with &drm_device.struct_mutex
* legacy locking schemes. Use this hook instead of @gem_free_object.
void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
* @gem_create_object: constructor for gem objects
* Hook for allocating the GEM object struct, for use by core
* helpers.
struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
size_t size);
/* prime: */
/* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
uint32_t handle, uint32_t flags, int *prime_fd);
/* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
int prime_fd, uint32_t *handle);
/* export GEM -> dmabuf */
struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
struct drm_gem_object *obj, int flags);
/* import dmabuf -> GEM */
struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
struct dma_buf *dma_buf);
/* low-level interface used by drm_gem_prime_{import,export} */
int (*gem_prime_pin)(struct drm_gem_object *obj);
void (*gem_prime_unpin)(struct drm_gem_object *obj);
struct reservation_object * (*gem_prime_res_obj)(
struct drm_gem_object *obj);
struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
struct drm_gem_object *(*gem_prime_import_sg_table)(
struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sgt);
void *(*gem_prime_vmap)(struct drm_gem_object *obj);
void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
int (*gem_prime_mmap)(struct drm_gem_object *obj,
struct vm_area_struct *vma);
* @dumb_create:
* This creates a new dumb buffer in the driver's backing storage manager (GEM,
* TTM or something else entirely) and returns the resulting buffer handle. This
* handle can then be wrapped up into a framebuffer modeset object.
* Note that userspace is not allowed to use such objects for render
* acceleration - drivers must create their own private ioctls for such a use
* case.
* Width, height and depth are specified in the &drm_mode_create_dumb
* argument. The callback needs to fill the handle, pitch and size for
* the created buffer.
* Called by the user via ioctl.
* Returns:
* Zero on success, negative errno on failure.
int (*dumb_create)(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
* @dumb_map_offset:
* Allocate an offset in the drm device node's address space to be able to
* memory map a dumb buffer. GEM-based drivers must use
* drm_gem_create_mmap_offset() to implement this.
* Called by the user via ioctl.
* Returns:
* Zero on success, negative errno on failure.
int (*dumb_map_offset)(struct drm_file *file_priv,
struct drm_device *dev, uint32_t handle,
uint64_t *offset);
* @dumb_destroy:
* This destroys the userspace handle for the given dumb backing storage buffer.
* Since buffer objects must be reference counted in the kernel a buffer object
* won't be immediately freed if a framebuffer modeset object still uses it.
* Called by the user via ioctl.
* Returns:
* Zero on success, negative errno on failure.
int (*dumb_destroy)(struct drm_file *file_priv,
struct drm_device *dev,
uint32_t handle);
/* Driver private ops for this object */
const struct vm_operations_struct *gem_vm_ops;
int major;
int minor;
int patchlevel;
char *name;
char *desc;
char *date;
u32 driver_features;
const struct drm_ioctl_desc *ioctls;
int num_ioctls;
const struct file_operations *fops;
/* Everything below here is for legacy driver, never use! */
/* private: */
/* List of devices hanging off this driver with stealth attach. */
struct list_head legacy_dev_list;
int (*firstopen) (struct drm_device *);
int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
int (*dma_quiescent) (struct drm_device *);
int (*context_dtor) (struct drm_device *dev, int context);
int dev_priv_size;
extern __printf(6, 7)
void drm_dev_printk(const struct device *dev, const char *level,
unsigned int category, const char *function_name,
const char *prefix, const char *format, ...);
extern __printf(3, 4)
void drm_printk(const char *level, unsigned int category,
const char *format, ...);
extern unsigned int drm_debug;
int drm_dev_init(struct drm_device *dev,
struct drm_driver *driver,
struct device *parent);
void drm_dev_fini(struct drm_device *dev);
struct drm_device *drm_dev_alloc(struct drm_driver *driver,
struct device *parent);
int drm_dev_register(struct drm_device *dev, unsigned long flags);
void drm_dev_unregister(struct drm_device *dev);
void drm_dev_ref(struct drm_device *dev);
void drm_dev_unref(struct drm_device *dev);
void drm_put_dev(struct drm_device *dev);
void drm_unplug_dev(struct drm_device *dev);
int drm_dev_set_unique(struct drm_device *dev, const char *name);