1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #ifndef _XE_PREEMPT_FENCE_H_ 7 #define _XE_PREEMPT_FENCE_H_ 8 9 #include "xe_preempt_fence_types.h" 10 11 struct list_head; 12 13 struct dma_fence * 14 xe_preempt_fence_create(struct xe_exec_queue *q, 15 u64 context, u32 seqno); 16 17 struct xe_preempt_fence *xe_preempt_fence_alloc(void); 18 19 void xe_preempt_fence_free(struct xe_preempt_fence *pfence); 20 21 struct dma_fence * 22 xe_preempt_fence_arm(struct xe_preempt_fence *pfence, struct xe_exec_queue *q, 23 u64 context, u32 seqno); 24 25 static inline struct xe_preempt_fence * 26 to_preempt_fence(struct dma_fence *fence) 27 { 28 return container_of(fence, struct xe_preempt_fence, base); 29 } 30 31 /** 32 * xe_preempt_fence_link() - Return a link used to keep unarmed preempt 33 * fences on a list. 34 * @pfence: Pointer to the preempt fence. 35 * 36 * The link is embedded in the struct xe_preempt_fence. Use 37 * link_to_preempt_fence() to convert back to the preempt fence. 38 * 39 * Return: A pointer to an embedded struct list_head. 40 */ 41 static inline struct list_head * 42 xe_preempt_fence_link(struct xe_preempt_fence *pfence) 43 { 44 return &pfence->link; 45 } 46 47 /** 48 * to_preempt_fence_from_link() - Convert back to a preempt fence pointer 49 * from a link obtained with xe_preempt_fence_link(). 50 * @link: The struct list_head obtained from xe_preempt_fence_link(). 51 * 52 * Return: A pointer to the embedding struct xe_preempt_fence. 53 */ 54 static inline struct xe_preempt_fence * 55 to_preempt_fence_from_link(struct list_head *link) 56 { 57 return container_of(link, struct xe_preempt_fence, link); 58 } 59 60 bool xe_fence_is_xe_preempt(const struct dma_fence *fence); 61 #endif 62