WebSVN – Kolibri OS – Blame – /drivers/include/drm/ttm/ttm_memory.h

Rev	Author	Line No.	Line
3262	Serge	1	/**************************************************************************
		2	*
		3	* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
		4	* All Rights Reserved.
		5	*
		6	* Permission is hereby granted, free of charge, to any person obtaining a
		7	* copy of this software and associated documentation files (the
		8	* "Software"), to deal in the Software without restriction, including
		9	* without limitation the rights to use, copy, modify, merge, publish,
		10	* distribute, sub license, and/or sell copies of the Software, and to
		11	* permit persons to whom the Software is furnished to do so, subject to
		12	* the following conditions:
		13	*
		14	* The above copyright notice and this permission notice (including the
		15	* next paragraph) shall be included in all copies or substantial portions
		16	* of the Software.
		17	*
		18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
		21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
		22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
		23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
		24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
		25	*
		26	**************************************************************************/
		27
		28	#ifndef TTM_MEMORY_H
		29	#define TTM_MEMORY_H
		30
3763	Serge	31	#include
3262	Serge	32	#include
		33	#include
		34	#include
		35	#include
3763	Serge	36	#include
3262	Serge	37	#include
		38
		39	/**
		40	* struct ttm_mem_shrink - callback to shrink TTM memory usage.
		41	*
		42	* @do_shrink: The callback function.
		43	*
		44	* Arguments to the do_shrink functions are intended to be passed using
		45	* inheritance. That is, the argument class derives from struct ttm_mem_shrink,
		46	* and can be accessed using container_of().
		47	*/
		48
		49	struct ttm_mem_shrink {
		50	int (do_shrink) (struct ttm_mem_shrink );
		51	};
		52
		53	/**
		54	* struct ttm_mem_global - Global memory accounting structure.
		55	*
		56	* @shrink: A single callback to shrink TTM memory usage. Extend this
		57	* to a linked list to be able to handle multiple callbacks when needed.
		58	* @swap_queue: A workqueue to handle shrinking in low memory situations. We
		59	* need a separate workqueue since it will spend a lot of time waiting
		60	* for the GPU, and this will otherwise block other workqueue tasks(?)
		61	* At this point we use only a single-threaded workqueue.
		62	* @work: The workqueue callback for the shrink queue.
		63	* @lock: Lock to protect the @shrink - and the memory accounting members,
		64	* that is, essentially the whole structure with some exceptions.
		65	* @zones: Array of pointers to accounting zones.
		66	* @num_zones: Number of populated entries in the @zones array.
		67	* @zone_kernel: Pointer to the kernel zone.
		68	* @zone_highmem: Pointer to the highmem zone if there is one.
		69	* @zone_dma32: Pointer to the dma32 zone if there is one.
		70	*
		71	* Note that this structure is not per device. It should be global for all
		72	* graphics devices.
		73	*/
		74
		75	#define TTM_MEM_MAX_ZONES 2
		76	struct ttm_mem_zone;
		77	struct ttm_mem_global {
6082	serge	78	struct kobject kobj;
3262	Serge	79	struct ttm_mem_shrink *shrink;
		80	struct workqueue_struct *swap_queue;
		81	struct work_struct work;
		82	spinlock_t lock;
		83	struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES];
		84	unsigned int num_zones;
		85	struct ttm_mem_zone *zone_kernel;
		86	#ifdef CONFIG_HIGHMEM
		87	struct ttm_mem_zone *zone_highmem;
		88	#else
		89	struct ttm_mem_zone *zone_dma32;
		90	#endif
		91	};
		92
		93	/**
		94	* ttm_mem_init_shrink - initialize a struct ttm_mem_shrink object
		95	*
		96	* @shrink: The object to initialize.
		97	* @func: The callback function.
		98	*/
		99
		100	static inline void ttm_mem_init_shrink(struct ttm_mem_shrink *shrink,
		101	int (func) (struct ttm_mem_shrink ))
		102	{
		103	shrink->do_shrink = func;
		104	}
		105
		106	/**
		107	* ttm_mem_register_shrink - register a struct ttm_mem_shrink object.
		108	*
		109	* @glob: The struct ttm_mem_global object to register with.
		110	* @shrink: An initialized struct ttm_mem_shrink object to register.
		111	*
		112	* Returns:
		113	* -EBUSY: There's already a callback registered. (May change).
		114	*/
		115
		116	static inline int ttm_mem_register_shrink(struct ttm_mem_global *glob,
		117	struct ttm_mem_shrink *shrink)
		118	{
		119	spin_lock(&glob->lock);
		120	if (glob->shrink != NULL) {
		121	spin_unlock(&glob->lock);
		122	return -EBUSY;
		123	}
		124	glob->shrink = shrink;
		125	spin_unlock(&glob->lock);
		126	return 0;
		127	}
		128
		129	/**
		130	* ttm_mem_unregister_shrink - unregister a struct ttm_mem_shrink object.
		131	*
		132	* @glob: The struct ttm_mem_global object to unregister from.
		133	* @shrink: A previously registert struct ttm_mem_shrink object.
		134	*
		135	*/
		136
		137	static inline void ttm_mem_unregister_shrink(struct ttm_mem_global *glob,
		138	struct ttm_mem_shrink *shrink)
		139	{
		140	spin_lock(&glob->lock);
		141	BUG_ON(glob->shrink != shrink);
		142	glob->shrink = NULL;
		143	spin_unlock(&glob->lock);
		144	}
		145
		146	extern int ttm_mem_global_init(struct ttm_mem_global *glob);
		147	extern void ttm_mem_global_release(struct ttm_mem_global *glob);
		148	extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
		149	bool no_wait, bool interruptible);
		150	extern void ttm_mem_global_free(struct ttm_mem_global *glob,
		151	uint64_t amount);
		152	extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
		153	struct page *page,
		154	bool no_wait, bool interruptible);
		155	extern void ttm_mem_global_free_page(struct ttm_mem_global *glob,
		156	struct page *page);
		157	extern size_t ttm_round_pot(size_t size);
		158	#endif

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(root)/drivers/include/drm/ttm/ttm_memory.h – Rev 6082