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

Rev	Author	Line No.	Line
1408	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
		31	//#include
		32	#include
		33	//#include
		34	#include
		35	//#include
		36	//#include
		37
		38	/**
		39	* struct ttm_mem_shrink - callback to shrink TTM memory usage.
		40	*
		41	* @do_shrink: The callback function.
		42	*
		43	* Arguments to the do_shrink functions are intended to be passed using
		44	* inheritance. That is, the argument class derives from struct ttm_mem_srink,
		45	* and can be accessed using container_of().
		46	*/
		47
		48	struct ttm_mem_shrink {
		49	int (do_shrink) (struct ttm_mem_shrink );
		50	};
		51
		52	/**
		53	* struct ttm_mem_global - Global memory accounting structure.
		54	*
		55	* @shrink: A single callback to shrink TTM memory usage. Extend this
		56	* to a linked list to be able to handle multiple callbacks when needed.
		57	* @swap_queue: A workqueue to handle shrinking in low memory situations. We
		58	* need a separate workqueue since it will spend a lot of time waiting
		59	* for the GPU, and this will otherwise block other workqueue tasks(?)
		60	* At this point we use only a single-threaded workqueue.
		61	* @work: The workqueue callback for the shrink queue.
		62	* @queue: Wait queue for processes suspended waiting for memory.
		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 {
		78	// struct kobject kobj;
		79	struct ttm_mem_shrink *shrink;
		80	// struct workqueue_struct *swap_queue;
		81	// struct work_struct work;
		82	// wait_queue_head_t queue;
		83	spinlock_t lock;
		84	struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES];
		85	unsigned int num_zones;
		86	struct ttm_mem_zone *zone_kernel;
		87	#ifdef CONFIG_HIGHMEM
		88	struct ttm_mem_zone *zone_highmem;
		89	#else
		90	struct ttm_mem_zone *zone_dma32;
		91	#endif
		92	};
		93
		94	/**
		95	* ttm_mem_init_shrink - initialize a struct ttm_mem_shrink object
		96	*
		97	* @shrink: The object to initialize.
		98	* @func: The callback function.
		99	*/
		100
		101	static inline void ttm_mem_init_shrink(struct ttm_mem_shrink *shrink,
		102	int (func) (struct ttm_mem_shrink ))
		103	{
		104	shrink->do_shrink = func;
		105	}
		106
		107	/**
		108	* ttm_mem_register_shrink - register a struct ttm_mem_shrink object.
		109	*
		110	* @glob: The struct ttm_mem_global object to register with.
		111	* @shrink: An initialized struct ttm_mem_shrink object to register.
		112	*
		113	* Returns:
		114	* -EBUSY: There's already a callback registered. (May change).
		115	*/
		116
		117	static inline int ttm_mem_register_shrink(struct ttm_mem_global *glob,
		118	struct ttm_mem_shrink *shrink)
		119	{
		120	spin_lock(&glob->lock);
		121	if (glob->shrink != NULL) {
		122	spin_unlock(&glob->lock);
		123	return -EBUSY;
		124	}
		125	glob->shrink = shrink;
		126	spin_unlock(&glob->lock);
		127	return 0;
		128	}
		129
		130	/**
		131	* ttm_mem_unregister_shrink - unregister a struct ttm_mem_shrink object.
		132	*
		133	* @glob: The struct ttm_mem_global object to unregister from.
		134	* @shrink: A previously registert struct ttm_mem_shrink object.
		135	*
		136	*/
		137
		138	static inline void ttm_mem_unregister_shrink(struct ttm_mem_global *glob,
		139	struct ttm_mem_shrink *shrink)
		140	{
		141	spin_lock(&glob->lock);
		142	BUG_ON(glob->shrink != shrink);
		143	glob->shrink = NULL;
		144	spin_unlock(&glob->lock);
		145	}
		146
		147	extern int ttm_mem_global_init(struct ttm_mem_global *glob);
		148	extern void ttm_mem_global_release(struct ttm_mem_global *glob);
		149	extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
		150	bool no_wait, bool interruptible);
		151	extern void ttm_mem_global_free(struct ttm_mem_global *glob,
		152	uint64_t amount);
		153	extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
		154	struct page *page,
		155	bool no_wait, bool interruptible);
		156	extern void ttm_mem_global_free_page(struct ttm_mem_global *glob,
		157	struct page *page);
		158	extern size_t ttm_round_pot(size_t size);
		159	#endif

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(root)/drivers/include/drm/ttm/ttm_memory.h – Rev 1875