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

Rev	Author	Line No.	Line
3391	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	* Authors: Thomas Hellstrom
		29	*/
		30
		31	#ifndef _TTM_EXECBUF_UTIL_H_
		32	#define _TTM_EXECBUF_UTIL_H_
		33
		34	#include
		35	#include
		36
		37	/**
		38	* struct ttm_validate_buffer
		39	*
		40	* @head: list head for thread-private list.
		41	* @bo: refcounted buffer object pointer.
		42	* @reserved: Indicates whether @bo has been reserved for validation.
		43	* @removed: Indicates whether @bo has been removed from lru lists.
		44	* @put_count: Number of outstanding references on bo::list_kref.
		45	* @old_sync_obj: Pointer to a sync object about to be unreferenced
		46	*/
		47
		48	struct ttm_validate_buffer {
		49	struct list_head head;
		50	struct ttm_buffer_object *bo;
		51	bool reserved;
		52	bool removed;
		53	int put_count;
		54	void *old_sync_obj;
		55	};
		56
		57	/**
		58	* function ttm_eu_backoff_reservation
		59	*
4065	Serge	60	* @ticket: ww_acquire_ctx from reserve call
3391	Serge	61	* @list: thread private list of ttm_validate_buffer structs.
		62	*
		63	* Undoes all buffer validation reservations for bos pointed to by
		64	* the list entries.
		65	*/
		66
4065	Serge	67	extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
		68	struct list_head *list);
3391	Serge	69
		70	/**
		71	* function ttm_eu_reserve_buffers
		72	*
4568	Serge	73	* @ticket: [out] ww_acquire_ctx filled in by call, or NULL if only
		74	* non-blocking reserves should be tried.
3391	Serge	75	* @list: thread private list of ttm_validate_buffer structs.
		76	*
		77	* Tries to reserve bos pointed to by the list entries for validation.
		78	* If the function returns 0, all buffers are marked as "unfenced",
		79	* taken off the lru lists and are not synced for write CPU usage.
		80	*
		81	* If the function detects a deadlock due to multiple threads trying to
		82	* reserve the same buffers in reverse order, all threads except one will
		83	* back off and retry. This function may sleep while waiting for
		84	* CPU write reservations to be cleared, and for other threads to
		85	* unreserve their buffers.
		86	*
		87	* This function may return -ERESTART or -EAGAIN if the calling process
		88	* receives a signal while waiting. In that case, no buffers on the list
		89	* will be reserved upon return.
		90	*
		91	* Buffers reserved by this function should be unreserved by
		92	* a call to either ttm_eu_backoff_reservation() or
		93	* ttm_eu_fence_buffer_objects() when command submission is complete or
		94	* has failed.
		95	*/
		96
4065	Serge	97	extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
		98	struct list_head *list);
3391	Serge	99
		100	/**
		101	* function ttm_eu_fence_buffer_objects.
		102	*
4065	Serge	103	* @ticket: ww_acquire_ctx from reserve call
3391	Serge	104	* @list: thread private list of ttm_validate_buffer structs.
		105	* @sync_obj: The new sync object for the buffers.
		106	*
		107	* This function should be called when command submission is complete, and
		108	* it will add a new sync object to bos pointed to by entries on @list.
		109	* It also unreserves all buffers, putting them on lru lists.
		110	*
		111	*/
		112
4065	Serge	113	extern void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
		114	struct list_head list, void sync_obj);
3391	Serge	115
		116	#endif

Subversion Repositories Kolibri OS

(root)/drivers/include/drm/ttm/ttm_execbuf_util.h – Rev 4568