134 lines
4.3 KiB
C
134 lines
4.3 KiB
C
/*
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* Copyright © 2021 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef VK_SYNC_TIMELINE_H
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#define VK_SYNC_TIMELINE_H
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#include "c11/threads.h"
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#include "util/list.h"
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#include "util/macros.h"
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#include "vk_sync.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct vk_sync_timeline_type {
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struct vk_sync_type sync;
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/* Type of each individual time point */
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const struct vk_sync_type *point_sync_type;
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};
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struct vk_sync_timeline_type
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vk_sync_timeline_get_type(const struct vk_sync_type *point_sync_type);
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struct vk_sync_timeline_point {
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struct vk_sync_timeline *timeline;
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struct list_head link;
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uint64_t value;
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int refcount;
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bool pending;
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struct vk_sync sync;
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};
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/** Implements a timeline vk_sync type on top of a binary vk_sync
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*
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* This is used for emulating VK_KHR_timeline_semaphores for implementations
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* whose kernel driver do not yet support timeline syncobj. Since it's a
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* requirement for Vulkan 1.2, it's useful to have an emulation like this.
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*
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* The driver should never see a vk_sync_timeline object. Instead, converting
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* from vk_sync_timeline to a binary vk_sync for a particular time point is
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* handled by common code. All a driver needs to do is declare its preferred
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* binary vk_sync_type for emulation as follows:
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*
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* const struct vk_sync_type anv_bo_sync_type = {
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* ...
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* };
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* VK_DECL_TIMELINE_TYPE(anv_bo_timeline_sync_type, &anv_bo_sync_type);
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*
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* and then anv_bo_timeline_sync_type.sync can be used as a sync type to
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* provide timelines.
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*/
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struct vk_sync_timeline {
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struct vk_sync sync;
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mtx_t mutex;
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cnd_t cond;
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uint64_t highest_past;
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uint64_t highest_pending;
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struct list_head pending_points;
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struct list_head free_points;
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};
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VkResult vk_sync_timeline_init(struct vk_device *device,
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struct vk_sync *sync,
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uint64_t initial_value);
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VkResult vk_sync_timeline_alloc_point(struct vk_device *device,
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struct vk_sync_timeline *timeline,
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uint64_t value,
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struct vk_sync_timeline_point **point_out);
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void vk_sync_timeline_point_free(struct vk_device *device,
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struct vk_sync_timeline_point *point);
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VkResult vk_sync_timeline_point_install(struct vk_device *device,
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struct vk_sync_timeline_point *point);
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VkResult vk_sync_timeline_get_point(struct vk_device *device,
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struct vk_sync_timeline *timeline,
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uint64_t wait_value,
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struct vk_sync_timeline_point **point_out);
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void vk_sync_timeline_point_release(struct vk_device *device,
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struct vk_sync_timeline_point *point);
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static inline bool
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vk_sync_type_is_vk_sync_timeline(const struct vk_sync_type *type)
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{
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return type->init == vk_sync_timeline_init;
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}
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static inline struct vk_sync_timeline *
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vk_sync_as_timeline(struct vk_sync *sync)
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{
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if (!vk_sync_type_is_vk_sync_timeline(sync->type))
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return NULL;
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return container_of(sync, struct vk_sync_timeline, sync);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* VK_SYNC_TIMELINE_H */
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