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