path: root/drivers/gpu/drm/i915/gem/i915_gem_object.h

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2016 Intel Corporation
 */

#ifndef __I915_GEM_OBJECT_H__
#define __I915_GEM_OBJECT_H__

#include <drm/drm_gem.h>
#include <drm/drm_file.h>
#include <drm/drm_device.h>

#include <drm/i915_drm.h>

#include "display/intel_frontbuffer.h"
#include "i915_gem_object_types.h"
#include "i915_gem_gtt.h"
#include "i915_vma_types.h"

void i915_gem_init__objects(struct drm_i915_private *i915);

struct drm_i915_gem_object *i915_gem_object_alloc(void);
void i915_gem_object_free(struct drm_i915_gem_object *obj);

void i915_gem_object_init(struct drm_i915_gem_object *obj,
			  const struct drm_i915_gem_object_ops *ops,
			  struct lock_class_key *key);
struct drm_i915_gem_object *
i915_gem_object_create_shmem(struct drm_i915_private *i915,
			     resource_size_t size);
struct drm_i915_gem_object *
i915_gem_object_create_shmem_from_data(struct drm_i915_private *i915,
				       const void *data, resource_size_t size);

extern const struct drm_i915_gem_object_ops i915_gem_shmem_ops;
void __i915_gem_object_release_shmem(struct drm_i915_gem_object *obj,
				     struct sg_table *pages,
				     bool needs_clflush);

int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align);

void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file);
void i915_gem_free_object(struct drm_gem_object *obj);

void i915_gem_flush_free_objects(struct drm_i915_private *i915);

struct sg_table *
__i915_gem_object_unset_pages(struct drm_i915_gem_object *obj);
void i915_gem_object_truncate(struct drm_i915_gem_object *obj);

/**
 * i915_gem_object_lookup_rcu - look up a temporary GEM object from its handle
 * @filp: DRM file private date
 * @handle: userspace handle
 *
 * Returns:
 *
 * A pointer to the object named by the handle if such exists on @filp, NULL
 * otherwise. This object is only valid whilst under the RCU read lock, and
 * note carefully the object may be in the process of being destroyed.
 */
static inline struct drm_i915_gem_object *
i915_gem_object_lookup_rcu(struct drm_file *file, u32 handle)
{
#ifdef CONFIG_LOCKDEP
	WARN_ON(debug_locks && !lock_is_held(&rcu_lock_map));
#endif
	return idr_find(&file->object_idr, handle);
}

static inline struct drm_i915_gem_object *
i915_gem_object_lookup(struct drm_file *file, u32 handle)
{
	struct drm_i915_gem_object *obj;

	rcu_read_lock();
	obj = i915_gem_object_lookup_rcu(file, handle);
	if (obj && !kref_get_unless_zero(&obj->base.refcount))
		obj = NULL;
	rcu_read_unlock();

	return obj;
}

__deprecated
struct drm_gem_object *
drm_gem_object_lookup(struct drm_file *file, u32 handle);

__attribute__((nonnull))
static inline struct drm_i915_gem_object *
i915_gem_object_get(struct drm_i915_gem_object *obj)
{
	drm_gem_object_get(&obj->base);
	return obj;
}

__attribute__((nonnull))
static inline void
i915_gem_object_put(struct drm_i915_gem_object *obj)
{
	__drm_gem_object_put(&obj->base);
}

#define assert_object_held(obj) dma_resv_assert_held((obj)->base.resv)

static inline void i915_gem_object_lock(struct drm_i915_gem_object *obj)
{
	dma_resv_lock(obj->base.resv, NULL);
}

static inline bool i915_gem_object_trylock(struct drm_i915_gem_object *obj)
{
	return dma_resv_trylock(obj->base.resv);
}

static inline int
i915_gem_object_lock_interruptible(struct drm_i915_gem_object *obj)
{
	return dma_resv_lock_interruptible(obj->base.resv, NULL);
}

static inline void i915_gem_object_unlock(struct drm_i915_gem_object *obj)
{
	dma_resv_unlock(obj->base.resv);
}

struct dma_fence *
i915_gem_object_lock_fence(struct drm_i915_gem_object *obj);
void i915_gem_object_unlock_fence(struct drm_i915_gem_object *obj,
				  struct dma_fence *fence);

static inline void
i915_gem_object_set_readonly(struct drm_i915_gem_object *obj)
{
	obj->flags |= I915_BO_READONLY;
}

static inline bool
i915_gem_object_is_readonly(const struct drm_i915_gem_object *obj)
{
	return obj->flags & I915_BO_READONLY;
}

static inline bool
i915_gem_object_is_contiguous(const struct drm_i915_gem_object *obj)
{
	return obj->flags & I915_BO_ALLOC_CONTIGUOUS;
}

static inline bool
i915_gem_object_is_volatile(const struct drm_i915_gem_object *obj)
{
	return obj->flags & I915_BO_ALLOC_VOLATILE;
}

static inline void
i915_gem_object_set_volatile(struct drm_i915_gem_object *obj)
{
	obj->flags |= I915_BO_ALLOC_VOLATILE;
}

static inline bool
i915_gem_object_type_has(const struct drm_i915_gem_object *obj,
			 unsigned long flags)
{
	return obj->ops->flags & flags;
}

static inline bool
i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
{
	return i915_gem_object_type_has(obj, I915_GEM_OBJECT_HAS_STRUCT_PAGE);
}

static inline bool
i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj)
{
	return i915_gem_object_type_has(obj, I915_GEM_OBJECT_IS_SHRINKABLE);
}

static inline bool
i915_gem_object_is_proxy(const struct drm_i915_gem_object *obj)
{
	return i915_gem_object_type_has(obj, I915_GEM_OBJECT_IS_PROXY);
}

static inline bool
i915_gem_object_never_bind_ggtt(const struct drm_i915_gem_object *obj)
{
	return i915_gem_object_type_has(obj, I915_GEM_OBJECT_NO_GGTT);
}

static inline bool
i915_gem_object_needs_async_cancel(const struct drm_i915_gem_object *obj)
{
	return i915_gem_object_type_has(obj, I915_GEM_OBJECT_ASYNC_CANCEL);
}

static inline bool
i915_gem_object_is_framebuffer(const struct drm_i915_gem_object *obj)
{
	return READ_ONCE(obj->frontbuffer);
}

static inline unsigned int
i915_gem_object_get_tiling(const struct drm_i915_gem_object *obj)
{
	return obj->tiling_and_stride & TILING_MASK;
}

static inline bool
i915_gem_object_is_tiled(const struct drm_i915_gem_object *obj)
{
	return i915_gem_object_get_tiling(obj) != I915_TILING_NONE;
}

static inline unsigned int
i915_gem_object_get_stride(const struct drm_i915_gem_object *obj)
{
	return obj->tiling_and_stride & STRIDE_MASK;
}

static inline unsigned int
i915_gem_tile_height(unsigned int tiling)
{
	GEM_BUG_ON(!tiling);
	return tiling == I915_TILING_Y ? 32 : 8;
}

static inline unsigned int
i915_gem_object_get_tile_height(const struct drm_i915_gem_object *obj)
{
	return i915_gem_tile_height(i915_gem_object_get_tiling(obj));
}

static inline unsigned int
i915_gem_object_get_tile_row_size(const struct drm_i915_gem_object *obj)
{
	return (i915_gem_object_get_stride(obj) *
		i915_gem_object_get_tile_height(obj));
}

int i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
			       unsigned int tiling, unsigned int stride);

struct scatterlist *
i915_gem_object_get_sg(struct drm_i915_gem_object *obj,
		       unsigned int n, unsigned int *offset);

struct page *
i915_gem_object_get_page(struct drm_i915_gem_object *obj,
			 unsigned int n);

struct page *
i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj,
			       unsigned int n);

dma_addr_t
i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj,
				    unsigned long n,
				    unsigned int *len);

dma_addr_t
i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj,
				unsigned long n);

void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
				 struct sg_table *pages,
				 unsigned int sg_page_sizes);

int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj);
int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj);

enum i915_mm_subclass { /* lockdep subclass for obj->mm.lock/struct_mutex */
	I915_MM_NORMAL = 0,
	<