[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / i915 / i915_gem_object.h

/*
 * Copyright © 2016 Intel Corporation
 *
 * 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
 * THE AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 */

#ifndef __I915_GEM_OBJECT_H__
#define __I915_GEM_OBJECT_H__

#include <linux/reservation.h>

#include <drm/drm_vma_manager.h>
#include <drm/drm_gem.h>
#include <drm/drmP.h>

#include <drm/i915_drm.h>

#include "i915_gem_request.h"
#include "i915_selftest.h"

struct drm_i915_gem_object;

struct drm_i915_gem_object_ops {
	unsigned int flags;
#define I915_GEM_OBJECT_HAS_STRUCT_PAGE BIT(0)
#define I915_GEM_OBJECT_IS_SHRINKABLE   BIT(1)

	/* Interface between the GEM object and its backing storage.
	 * get_pages() is called once prior to the use of the associated set
	 * of pages before to binding them into the GTT, and put_pages() is
	 * called after we no longer need them. As we expect there to be
	 * associated cost with migrating pages between the backing storage
	 * and making them available for the GPU (e.g. clflush), we may hold
	 * onto the pages after they are no longer referenced by the GPU
	 * in case they may be used again shortly (for example migrating the
	 * pages to a different memory domain within the GTT). put_pages()
	 * will therefore most likely be called when the object itself is
	 * being released or under memory pressure (where we attempt to
	 * reap pages for the shrinker).
	 */
	struct sg_table *(*get_pages)(struct drm_i915_gem_object *);
	void (*put_pages)(struct drm_i915_gem_object *, struct sg_table *);

	int (*pwrite)(struct drm_i915_gem_object *,
		      const struct drm_i915_gem_pwrite *);

	int (*dmabuf_export)(struct drm_i915_gem_object *);
	void (*release)(struct drm_i915_gem_object *);
};

struct drm_i915_gem_object {
	struct drm_gem_object base;

	const struct drm_i915_gem_object_ops *ops;

	/**
	 * @vma_list: List of VMAs backed by this object
	 *
	 * The VMA on this list are ordered by type, all GGTT vma are placed
	 * at the head and all ppGTT vma are placed at the tail. The different
	 * types of GGTT vma are unordered between themselves, use the
	 * @vma_tree (which has a defined order between all VMA) to find an
	 * exact match.
	 */
	struct list_head vma_list;
	/**
	 * @vma_tree: Ordered tree of VMAs backed by this object
	 *
	 * All VMA created for this object are placed in the @vma_tree for
	 * fast retrieval via a binary search in i915_vma_instance().
	 * They are also added to @vma_list for easy iteration.
	 */
	struct rb_root vma_tree;
	struct i915_vma *vma_hashed;

	/** Stolen memory for this object, instead of being backed by shmem. */
	struct drm_mm_node *stolen;
	struct list_head global_link;
	union {
		struct rcu_head rcu;
		struct llist_node freed;
	};

	/**
	 * Whether the object is currently in the GGTT mmap.
	 */
	struct list_head userfault_link;

	struct list_head batch_pool_link;
	I915_SELFTEST_DECLARE(struct list_head st_link);

	unsigned long flags;

	/**
	 * Have we taken a reference for the object for incomplete GPU
	 * activity?
	 */
#define I915_BO_ACTIVE_REF 0

	/*
	 * Is the object to be mapped as read-only to the GPU
	 * Only honoured if hardware has relevant pte bit
	 */
	unsigned long gt_ro:1;
	unsigned int cache_level:3;
	unsigned int cache_coherent:2;
#define I915_BO_CACHE_COHERENT_FOR_READ BIT(0)
#define I915_BO_CACHE_COHERENT_FOR_WRITE BIT(1)
	unsigned int cache_dirty:1;

	atomic_t frontbuffer_bits;
	unsigned int frontbuffer_ggtt_origin; /* write once */
	struct i915_gem_active frontbuffer_write;

	/** Current tiling stride for the object, if it's tiled. */
	unsigned int tiling_and_stride;
#define FENCE_MINIMUM_STRIDE 128 /* See i915_tiling_ok() */
#define TILING_MASK (FENCE_MINIMUM_STRIDE-1)
#define STRIDE_MASK (~TILING_MASK)

	/** Count of VMA actually bound by this object */
	unsigned int bind_count;
	unsigned int active_count;
	unsigned int pin_display;

	struct {
		struct mutex lock; /* protects the pages and their use */
		atomic_t pages_pin_count;

		struct sg_table *pages;
		void *mapping;

		struct i915_gem_object_page_iter {
			struct scatterlist *sg_pos;
			unsigned int sg_idx; /* in pages, but 32bit eek! */

			struct radix_tree_root radix;
			struct mutex lock; /* protects this cache */
		} get_page;

		/**
		 * Advice: are the backing pages purgeable?
		 */
		unsigned int madv:2;

		/**
		 * This is set if the object has been written to since the
		 * pages were last acquired.
		 */
		bool dirty:1;

		/**
		 * This is set if the object has been pinned due to unknown
		 * swizzling.
		 */
		bool quirked:1;
	} mm;

	/** Breadcrumb of last rendering to the buffer.
	 * There can only be one writer, but we allow for multiple readers.
	 * If there is a writer that necessarily implies that all other
	 * read requests are complete - but we may only be lazily clearing
	 * the read requests. A read request is naturally the most recent
	 * request on a ring, so we may have two different write and read
	 * requests on one ring where the write request is older than the
	 * read request. This allows for the CPU to read from an active
	 * buffer by only waiting for the write to complete.
	 */
	struct reservation_object *resv;

	/** References from framebuffers, locks out tiling changes. */
	unsigned int framebuffer_references;

	/** Record of address bit 17 of each page at last unbind. */
	unsigned long *bit_17;

	union {
		struct i915_gem_userptr {
			uintptr_t ptr;
			unsigned read_only :1;

			struct i915_mm_struct *mm;
			struct i915_mmu_object *mmu_object;
			struct work_struct *work;
		} userptr;

		unsigned long scratch;
	};

	/** for phys allocated objects */
	struct drm_dma_handle *phys_handle;

	struct reservation_object __builtin_resv;
};

static inline struct drm_i915_gem_object *
to_intel_bo(struct drm_gem_object *gem)
{
	/* Assert that to_intel_bo(NULL) == NULL */
	BUILD_BUG_ON(offsetof(struct drm_i915_gem_object, base));

	return container_of(gem, struct drm_i915_gem_object, base);
}

/**
 * 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
extern 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_reference(&obj->base);
	return obj;
}

__deprecated
extern void drm_gem_object_reference(struct drm_gem_object *);

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

__deprecated
extern void drm_gem_object_unreference(struct drm_gem_object *);

__deprecated
extern void drm_gem_object_unreference_unlocked(struct drm_gem_object *);

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

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

static inline bool
i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
{
	return obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE;
}

static inline bool
i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj)
{
	return obj->ops->flags & I915_GEM_OBJECT_IS_SHRINKABLE;
}

static inline bool
i915_gem_object_is_active(const struct drm_i915_gem_object *obj)
{
	return obj->active_count;
}

static inline bool
i915_gem_object_has_active_reference(const struct drm_i915_gem_object *obj)
{
	return test_bit(I915_BO_ACTIVE_REF, &obj->flags);
}

static inline void
i915_gem_object_set_active_reference(struct drm_i915_gem_object *obj)
{
	lockdep_assert_held(&obj->base.dev->struct_mutex);
	__set_bit(I915_BO_ACTIVE_REF, &obj->flags);
}

static inline void
i915_gem_object_clear_active_reference(struct drm_i915_gem_object *obj)
{
	lockdep_assert_held(&obj->base.dev->struct_mutex);
	__clear_bit(I915_BO_ACTIVE_REF, &obj->flags);
}

void __i915_gem_object_release_unless_active(struct drm_i915_gem_object *obj);

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

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

static inline bool
i915_gem_object_is_tiled(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(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(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(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);

static inline struct intel_engine_cs *
i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
{
	struct intel_engine_cs *engine = NULL;
	struct dma_fence *fence;

	rcu_read_lock();
	fence = reservation_object_get_excl_rcu(obj->resv);
	rcu_read_unlock();

	if (fence && dma_fence_is_i915(fence) && !dma_fence_is_signaled(fence))
		engine = to_request(fence)->engine;
	dma_fence_put(fence);

	return engine;
}

void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
					 unsigned int cache_level);
void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj);

#endif
Commit	Line	Data
b42fe9ca JL	1	/*
	2	* Copyright © 2016 Intel Corporation
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice (including the next
	12	* paragraph) shall be included in all copies or substantial portions of the
	13	* Software.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	16	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	18	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	20	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	21	* IN THE SOFTWARE.
	22	*
	23	*/
	24
	25	#ifndef __I915_GEM_OBJECT_H__
	26	#define __I915_GEM_OBJECT_H__
	27
	28	#include <linux/reservation.h>
	29
	30	#include <drm/drm_vma_manager.h>
	31	#include <drm/drm_gem.h>
	32	#include <drm/drmP.h>
	33
	34	#include <drm/i915_drm.h>
	35
b8f55be6	36	#include "i915_gem_request.h"
8d28ba45 CW	37	#include "i915_selftest.h"
8d28ba45 CW	38
b8f55be6 CW	39	struct drm_i915_gem_object;
b8f55be6 CW	40
b42fe9ca JL	41	struct drm_i915_gem_object_ops {
b42fe9ca JL	42	unsigned int flags;
22284f40 CW	43	#define I915_GEM_OBJECT_HAS_STRUCT_PAGE BIT(0)
22284f40 CW	44	#define I915_GEM_OBJECT_IS_SHRINKABLE BIT(1)
b42fe9ca JL	45
	46	/* Interface between the GEM object and its backing storage.
	47	* get_pages() is called once prior to the use of the associated set
	48	* of pages before to binding them into the GTT, and put_pages() is
	49	* called after we no longer need them. As we expect there to be
	50	* associated cost with migrating pages between the backing storage
	51	* and making them available for the GPU (e.g. clflush), we may hold
	52	* onto the pages after they are no longer referenced by the GPU
	53	* in case they may be used again shortly (for example migrating the
	54	* pages to a different memory domain within the GTT). put_pages()
	55	* will therefore most likely be called when the object itself is
	56	* being released or under memory pressure (where we attempt to
	57	* reap pages for the shrinker).
	58	*/
	59	struct sg_table (get_pages)(struct drm_i915_gem_object *);
	60	void (put_pages)(struct drm_i915_gem_object , struct sg_table *);
	61
7c55e2c5 CW	62	int (pwrite)(struct drm_i915_gem_object ,
	63	const struct drm_i915_gem_pwrite *);
	64
b42fe9ca JL	65	int (dmabuf_export)(struct drm_i915_gem_object );
	66	void (release)(struct drm_i915_gem_object );
	67	};
	68
	69	struct drm_i915_gem_object {
	70	struct drm_gem_object base;
	71
	72	const struct drm_i915_gem_object_ops *ops;
	73
b5a82425 CW	74	/**
	75	* @vma_list: List of VMAs backed by this object
	76	*
	77	* The VMA on this list are ordered by type, all GGTT vma are placed
	78	* at the head and all ppGTT vma are placed at the tail. The different
	79	* types of GGTT vma are unordered between themselves, use the
	80	* @vma_tree (which has a defined order between all VMA) to find an
	81	* exact match.
	82	*/
b42fe9ca	83	struct list_head vma_list;
b5a82425 CW	84	/**
	85	* @vma_tree: Ordered tree of VMAs backed by this object
	86	*
	87	* All VMA created for this object are placed in the @vma_tree for
	88	* fast retrieval via a binary search in i915_vma_instance().
	89	* They are also added to @vma_list for easy iteration.
	90	*/
b42fe9ca	91	struct rb_root vma_tree;
4ff4b44c	92	struct i915_vma *vma_hashed;
b42fe9ca JL	93
	94	/** Stolen memory for this object, instead of being backed by shmem. */
	95	struct drm_mm_node *stolen;
	96	struct list_head global_link;
	97	union {
	98	struct rcu_head rcu;
	99	struct llist_node freed;
	100	};
	101
	102	/**
	103	* Whether the object is currently in the GGTT mmap.
	104	*/
	105	struct list_head userfault_link;
	106
b42fe9ca	107	struct list_head batch_pool_link;
8d28ba45	108	I915_SELFTEST_DECLARE(struct list_head st_link);
b42fe9ca JL	109
	110	unsigned long flags;
	111
	112	/**
	113	* Have we taken a reference for the object for incomplete GPU
	114	* activity?
	115	*/
	116	#define I915_BO_ACTIVE_REF 0
	117
	118	/*
	119	* Is the object to be mapped as read-only to the GPU
	120	* Only honoured if hardware has relevant pte bit
	121	*/
	122	unsigned long gt_ro:1;
	123	unsigned int cache_level:3;
b8f55be6 CW	124	unsigned int cache_coherent:2;
	125	#define I915_BO_CACHE_COHERENT_FOR_READ BIT(0)
	126	#define I915_BO_CACHE_COHERENT_FOR_WRITE BIT(1)
b42fe9ca JL	127	unsigned int cache_dirty:1;
	128
	129	atomic_t frontbuffer_bits;
	130	unsigned int frontbuffer_ggtt_origin; /* write once */
5b8c8aec	131	struct i915_gem_active frontbuffer_write;
b42fe9ca JL	132
	133	/** Current tiling stride for the object, if it's tiled. */
	134	unsigned int tiling_and_stride;
	135	#define FENCE_MINIMUM_STRIDE 128 /* See i915_tiling_ok() */
	136	#define TILING_MASK (FENCE_MINIMUM_STRIDE-1)
	137	#define STRIDE_MASK (~TILING_MASK)
	138
	139	/** Count of VMA actually bound by this object */
	140	unsigned int bind_count;
	141	unsigned int active_count;
	142	unsigned int pin_display;
	143
	144	struct {
	145	struct mutex lock; /* protects the pages and their use */
	146	atomic_t pages_pin_count;
	147
	148	struct sg_table *pages;
	149	void *mapping;
	150
	151	struct i915_gem_object_page_iter {
	152	struct scatterlist *sg_pos;
	153	unsigned int sg_idx; /* in pages, but 32bit eek! */
	154
	155	struct radix_tree_root radix;
	156	struct mutex lock; /* protects this cache */
	157	} get_page;
	158
	159	/**
	160	* Advice: are the backing pages purgeable?
	161	*/
	162	unsigned int madv:2;
	163
	164	/**
	165	* This is set if the object has been written to since the
	166	* pages were last acquired.
	167	*/
	168	bool dirty:1;
	169
	170	/**
	171	* This is set if the object has been pinned due to unknown
	172	* swizzling.
	173	*/
	174	bool quirked:1;
	175	} mm;
	176
	177	/** Breadcrumb of last rendering to the buffer.
	178	* There can only be one writer, but we allow for multiple readers.
	179	* If there is a writer that necessarily implies that all other
	180	* read requests are complete - but we may only be lazily clearing
	181	* the read requests. A read request is naturally the most recent
	182	* request on a ring, so we may have two different write and read
	183	* requests on one ring where the write request is older than the
	184	* read request. This allows for the CPU to read from an active
	185	* buffer by only waiting for the write to complete.
	186	*/
	187	struct reservation_object *resv;
	188
	189	/** References from framebuffers, locks out tiling changes. */
dd689287	190	unsigned int framebuffer_references;
b42fe9ca JL	191
	192	/** Record of address bit 17 of each page at last unbind. */
	193	unsigned long *bit_17;
	194
44653988 CW	195	union {
	196	struct i915_gem_userptr {
	197	uintptr_t ptr;
	198	unsigned read_only :1;
	199
	200	struct i915_mm_struct *mm;
	201	struct i915_mmu_object *mmu_object;
	202	struct work_struct *work;
	203	} userptr;
	204
	205	unsigned long scratch;
	206	};
b42fe9ca JL	207
	208	/** for phys allocated objects */
	209	struct drm_dma_handle *phys_handle;
	210
	211	struct reservation_object __builtin_resv;
	212	};
	213
	214	static inline struct drm_i915_gem_object *
	215	to_intel_bo(struct drm_gem_object *gem)
	216	{
	217	/* Assert that to_intel_bo(NULL) == NULL */
	218	BUILD_BUG_ON(offsetof(struct drm_i915_gem_object, base));
	219
	220	return container_of(gem, struct drm_i915_gem_object, base);
	221	}
	222
	223	/**
	224	* i915_gem_object_lookup_rcu - look up a temporary GEM object from its handle
	225	* @filp: DRM file private date
	226	* @handle: userspace handle
	227	*
	228	* Returns:
	229	*
	230	* A pointer to the object named by the handle if such exists on @filp, NULL
	231	* otherwise. This object is only valid whilst under the RCU read lock, and
	232	* note carefully the object may be in the process of being destroyed.
	233	*/
	234	static inline struct drm_i915_gem_object *
	235	i915_gem_object_lookup_rcu(struct drm_file *file, u32 handle)
	236	{
	237	#ifdef CONFIG_LOCKDEP
	238	WARN_ON(debug_locks && !lock_is_held(&rcu_lock_map));
	239	#endif
	240	return idr_find(&file->object_idr, handle);
	241	}
	242
	243	static inline struct drm_i915_gem_object *
	244	i915_gem_object_lookup(struct drm_file *file, u32 handle)
	245	{
	246	struct drm_i915_gem_object *obj;
	247
	248	rcu_read_lock();
	249	obj = i915_gem_object_lookup_rcu(file, handle);
	250	if (obj && !kref_get_unless_zero(&obj->base.refcount))
	251	obj = NULL;
	252	rcu_read_unlock();
	253
	254	return obj;
	255	}
	256
	257	__deprecated
	258	extern struct drm_gem_object *
	259	drm_gem_object_lookup(struct drm_file *file, u32 handle);
	260
	261	__attribute__((nonnull))
	262	static inline struct drm_i915_gem_object *
	263	i915_gem_object_get(struct drm_i915_gem_object *obj)
	264	{
	265	drm_gem_object_reference(&obj->base);
	266	return obj;
	267	}
	268
	269	__deprecated
	270	extern void drm_gem_object_reference(struct drm_gem_object *);
271
272	__attribute__((nonnull))
273	static inline void
274	i915_gem_object_put(struct drm_i915_gem_object *obj)
275	{
276	__drm_gem_object_unreference(&obj->base);
277	}
278
279	__deprecated
280	extern void drm_gem_object_unreference(struct drm_gem_object *);
281
282	__deprecated
283	extern void drm_gem_object_unreference_unlocked(struct drm_gem_object *);
284
dd689287 CW	285	static inline void i915_gem_object_lock(struct drm_i915_gem_object *obj)
	286	{
	287	reservation_object_lock(obj->resv, NULL);
	288	}
	289
	290	static inline void i915_gem_object_unlock(struct drm_i915_gem_object *obj)
	291	{
	292	reservation_object_unlock(obj->resv);
	293	}
	294
b42fe9ca JL	295	static inline bool
	296	i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
	297	{
	298	return obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE;
	299	}
	300
	301	static inline bool
	302	i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj)
	303	{
	304	return obj->ops->flags & I915_GEM_OBJECT_IS_SHRINKABLE;
	305	}
	306
	307	static inline bool
	308	i915_gem_object_is_active(const struct drm_i915_gem_object *obj)
	309	{
	310	return obj->active_count;
	311	}
	312
	313	static inline bool
	314	i915_gem_object_has_active_reference(const struct drm_i915_gem_object *obj)
	315	{
	316	return test_bit(I915_BO_ACTIVE_REF, &obj->flags);
	317	}
	318
	319	static inline void
	320	i915_gem_object_set_active_reference(struct drm_i915_gem_object *obj)
	321	{
	322	lockdep_assert_held(&obj->base.dev->struct_mutex);
	323	__set_bit(I915_BO_ACTIVE_REF, &obj->flags);
	324	}
	325
	326	static inline void
	327	i915_gem_object_clear_active_reference(struct drm_i915_gem_object *obj)
	328	{
	329	lockdep_assert_held(&obj->base.dev->struct_mutex);
	330	__clear_bit(I915_BO_ACTIVE_REF, &obj->flags);
	331	}
	332
	333	void __i915_gem_object_release_unless_active(struct drm_i915_gem_object *obj);
	334
dd689287 CW	335	static inline bool
	336	i915_gem_object_is_framebuffer(const struct drm_i915_gem_object *obj)
	337	{
	338	return READ_ONCE(obj->framebuffer_references);
	339	}
	340
b42fe9ca JL	341	static inline unsigned int
	342	i915_gem_object_get_tiling(struct drm_i915_gem_object *obj)
	343	{
	344	return obj->tiling_and_stride & TILING_MASK;
	345	}
	346
	347	static inline bool
	348	i915_gem_object_is_tiled(struct drm_i915_gem_object *obj)
	349	{
	350	return i915_gem_object_get_tiling(obj) != I915_TILING_NONE;
	351	}
	352
	353	static inline unsigned int
	354	i915_gem_object_get_stride(struct drm_i915_gem_object *obj)
	355	{
	356	return obj->tiling_and_stride & STRIDE_MASK;
	357	}
	358
6649a0b6 CW	359	static inline unsigned int
	360	i915_gem_tile_height(unsigned int tiling)
	361	{
	362	GEM_BUG_ON(!tiling);
	363	return tiling == I915_TILING_Y ? 32 : 8;
	364	}
	365
	366	static inline unsigned int
	367	i915_gem_object_get_tile_height(struct drm_i915_gem_object *obj)
	368	{
	369	return i915_gem_tile_height(i915_gem_object_get_tiling(obj));
	370	}
	371
	372	static inline unsigned int
	373	i915_gem_object_get_tile_row_size(struct drm_i915_gem_object *obj)
	374	{
	375	return (i915_gem_object_get_stride(obj) *
	376	i915_gem_object_get_tile_height(obj));
	377	}
	378
957870f9 CW	379	int i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
	380	unsigned int tiling, unsigned int stride);
	381
b42fe9ca JL	382	static inline struct intel_engine_cs *
	383	i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
	384	{
	385	struct intel_engine_cs *engine = NULL;
	386	struct dma_fence *fence;
	387
	388	rcu_read_lock();
	389	fence = reservation_object_get_excl_rcu(obj->resv);
	390	rcu_read_unlock();
	391
	392	if (fence && dma_fence_is_i915(fence) && !dma_fence_is_signaled(fence))
	393	engine = to_request(fence)->engine;
	394	dma_fence_put(fence);
	395
	396	return engine;
	397	}
	398
b8f55be6 CW	399	void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
b8f55be6 CW	400	unsigned int cache_level);
5a97bcc6 CW	401	void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj);
5a97bcc6 CW	402
b42fe9ca JL	403	#endif
b42fe9ca JL	404