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      1 /*	$NetBSD: intel_timeline.h,v 1.2 2021/12/18 23:45:30 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright  2016 Intel Corporation
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the next
     14  * paragraph) shall be included in all copies or substantial portions of the
     15  * Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     23  * IN THE SOFTWARE.
     24  *
     25  */
     26 
     27 #ifndef I915_TIMELINE_H
     28 #define I915_TIMELINE_H
     29 
     30 #include <linux/lockdep.h>
     31 
     32 #include "i915_active.h"
     33 #include "i915_syncmap.h"
     34 #include "gt/intel_timeline_types.h"
     35 
     36 int intel_timeline_init(struct intel_timeline *tl,
     37 			struct intel_gt *gt,
     38 			struct i915_vma *hwsp);
     39 void intel_timeline_fini(struct intel_timeline *tl);
     40 
     41 struct intel_timeline *
     42 intel_timeline_create(struct intel_gt *gt, struct i915_vma *global_hwsp);
     43 
     44 static inline struct intel_timeline *
     45 intel_timeline_get(struct intel_timeline *timeline)
     46 {
     47 	kref_get(&timeline->kref);
     48 	return timeline;
     49 }
     50 
     51 void __intel_timeline_free(struct kref *kref);
     52 static inline void intel_timeline_put(struct intel_timeline *timeline)
     53 {
     54 	kref_put(&timeline->kref, __intel_timeline_free);
     55 }
     56 
     57 static inline int __intel_timeline_sync_set(struct intel_timeline *tl,
     58 					    u64 context, u32 seqno)
     59 {
     60 	return i915_syncmap_set(&tl->sync, context, seqno);
     61 }
     62 
     63 static inline int intel_timeline_sync_set(struct intel_timeline *tl,
     64 					  const struct dma_fence *fence)
     65 {
     66 	return __intel_timeline_sync_set(tl, fence->context, fence->seqno);
     67 }
     68 
     69 static inline bool __intel_timeline_sync_is_later(struct intel_timeline *tl,
     70 						  u64 context, u32 seqno)
     71 {
     72 	return i915_syncmap_is_later(&tl->sync, context, seqno);
     73 }
     74 
     75 static inline bool intel_timeline_sync_is_later(struct intel_timeline *tl,
     76 						const struct dma_fence *fence)
     77 {
     78 	return __intel_timeline_sync_is_later(tl, fence->context, fence->seqno);
     79 }
     80 
     81 int intel_timeline_pin(struct intel_timeline *tl);
     82 void intel_timeline_enter(struct intel_timeline *tl);
     83 int intel_timeline_get_seqno(struct intel_timeline *tl,
     84 			     struct i915_request *rq,
     85 			     u32 *seqno);
     86 void intel_timeline_exit(struct intel_timeline *tl);
     87 void intel_timeline_unpin(struct intel_timeline *tl);
     88 
     89 int intel_timeline_read_hwsp(struct i915_request *from,
     90 			     struct i915_request *until,
     91 			     u32 *hwsp_offset);
     92 
     93 void intel_gt_init_timelines(struct intel_gt *gt);
     94 void intel_gt_fini_timelines(struct intel_gt *gt);
     95 
     96 #endif
     97