1247835Skib/************************************************************************** 2247835Skib * 3247835Skib * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA 4247835Skib * All Rights Reserved. 5247835Skib * 6247835Skib * Permission is hereby granted, free of charge, to any person obtaining a 7247835Skib * copy of this software and associated documentation files (the 8247835Skib * "Software"), to deal in the Software without restriction, including 9247835Skib * without limitation the rights to use, copy, modify, merge, publish, 10247835Skib * distribute, sub license, and/or sell copies of the Software, and to 11247835Skib * permit persons to whom the Software is furnished to do so, subject to 12247835Skib * the following conditions: 13247835Skib * 14247835Skib * The above copyright notice and this permission notice (including the 15247835Skib * next paragraph) shall be included in all copies or substantial portions 16247835Skib * of the Software. 17247835Skib * 18247835Skib * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19247835Skib * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20247835Skib * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21247835Skib * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22247835Skib * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23247835Skib * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24247835Skib * USE OR OTHER DEALINGS IN THE SOFTWARE. 25247835Skib * 26247835Skib **************************************************************************/ 27247835Skib/* 28247835Skib * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> 29247835Skib */ 30247835Skib/* $FreeBSD$ */ 31247835Skib 32247835Skib#ifndef _TTM_EXECBUF_UTIL_H_ 33247835Skib#define _TTM_EXECBUF_UTIL_H_ 34247835Skib 35247835Skib#include <dev/drm2/ttm/ttm_bo_api.h> 36247835Skib 37247835Skib/** 38247835Skib * struct ttm_validate_buffer 39247835Skib * 40247835Skib * @head: list head for thread-private list. 41247835Skib * @bo: refcounted buffer object pointer. 42247835Skib * @reserved: Indicates whether @bo has been reserved for validation. 43247835Skib * @removed: Indicates whether @bo has been removed from lru lists. 44247835Skib * @put_count: Number of outstanding references on bo::list_kref. 45247835Skib * @old_sync_obj: Pointer to a sync object about to be unreferenced 46247835Skib */ 47247835Skib 48247835Skibstruct ttm_validate_buffer { 49247835Skib struct list_head head; 50247835Skib struct ttm_buffer_object *bo; 51247835Skib bool reserved; 52247835Skib bool removed; 53247835Skib int put_count; 54247835Skib void *old_sync_obj; 55247835Skib}; 56247835Skib 57247835Skib/** 58247835Skib * function ttm_eu_backoff_reservation 59247835Skib * 60247835Skib * @list: thread private list of ttm_validate_buffer structs. 61247835Skib * 62247835Skib * Undoes all buffer validation reservations for bos pointed to by 63247835Skib * the list entries. 64247835Skib */ 65247835Skib 66247835Skibextern void ttm_eu_backoff_reservation(struct list_head *list); 67247835Skib 68247835Skib/** 69247835Skib * function ttm_eu_reserve_buffers 70247835Skib * 71247835Skib * @list: thread private list of ttm_validate_buffer structs. 72247835Skib * 73247835Skib * Tries to reserve bos pointed to by the list entries for validation. 74247835Skib * If the function returns 0, all buffers are marked as "unfenced", 75247835Skib * taken off the lru lists and are not synced for write CPU usage. 76247835Skib * 77247835Skib * If the function detects a deadlock due to multiple threads trying to 78247835Skib * reserve the same buffers in reverse order, all threads except one will 79247835Skib * back off and retry. This function may sleep while waiting for 80247835Skib * CPU write reservations to be cleared, and for other threads to 81247835Skib * unreserve their buffers. 82247835Skib * 83247835Skib * This function may return -ERESTART or -EAGAIN if the calling process 84247835Skib * receives a signal while waiting. In that case, no buffers on the list 85247835Skib * will be reserved upon return. 86247835Skib * 87247835Skib * Buffers reserved by this function should be unreserved by 88247835Skib * a call to either ttm_eu_backoff_reservation() or 89247835Skib * ttm_eu_fence_buffer_objects() when command submission is complete or 90247835Skib * has failed. 91247835Skib */ 92247835Skib 93247835Skibextern int ttm_eu_reserve_buffers(struct list_head *list); 94247835Skib 95247835Skib/** 96247835Skib * function ttm_eu_fence_buffer_objects. 97247835Skib * 98247835Skib * @list: thread private list of ttm_validate_buffer structs. 99247835Skib * @sync_obj: The new sync object for the buffers. 100247835Skib * 101247835Skib * This function should be called when command submission is complete, and 102247835Skib * it will add a new sync object to bos pointed to by entries on @list. 103247835Skib * It also unreserves all buffers, putting them on lru lists. 104247835Skib * 105247835Skib */ 106247835Skib 107247835Skibextern void ttm_eu_fence_buffer_objects(struct list_head *list, void *sync_obj); 108247835Skib 109247835Skib#endif 110