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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_H #define VK_SYNC_H #include <stdbool.h> #include <vulkan/vulkan_core.h> #include "util/macros.h" #ifdef __cplusplus extern "C" { #endif struct vk_device; struct vk_sync; enum vk_sync_features { /** Set if a sync type supports the binary mode of operation * * In binary mode, a vk_sync has two modes: signaled and unsignaled. If * it supports CPU_RESET, it can be changed from signaled to unsignaled on * the CPU via vk_sync_reset(). If it supports CPU_SIGNAL, it can be * changed from unsignaled to signaled on the CPU via vk_sync_signal(). * * Binary vk_sync types may also support WAIT_PENDING in which they have a * third hidden pending state. Once such a vk_sync has been submitted to * the kernel driver for signaling, it is in the pending state and remains * there until the work is complete at which point it enters the signaled * state. This pending state is visible across processes for shared * vk_sync types. This is used to by the threaded submit mode to ensure * that everything gets submitted to the kernel driver in-order. * * A vk_sync operates in binary mode if VK_SYNC_IS_TIMELINE is not set * in vk_sync::flags. */ VK_SYNC_FEATURE_BINARY = (1 << 0), /** Set if a sync type supports the timeline mode of operation * * In timeline mode, a vk_sync has a monotonically increasing 64-bit value * which represents most recently signaled time point. Waits are relative * to time points. Instead of waiting for the vk_sync to enter a signaled * state, you wait for its 64-bit value to be at least some wait value. * * Timeline vk_sync types can also support WAIT_PENDING. In this case, the * wait is not for a pending state, as such, but rather for someone to have * submitted a kernel request which will signal a time point with at least * that value. Logically, you can think of this as having two timelines, * the real timeline and a pending timeline which runs slightly ahead of * the real one. As with binary vk_sync types, this is used by threaded * submit to re-order things so that the kernel requests happen in a valid * linear order. * * A vk_sync operates in timeline mode if VK_SYNC_IS_TIMELINE is set in * vk_sync::flags. */ VK_SYNC_FEATURE_TIMELINE = (1 << 1), /** Set if this sync supports GPU waits */ VK_SYNC_FEATURE_GPU_WAIT = (1 << 2), /** Set if a sync type supports multiple GPU waits on one signal state * * The Vulkan spec for VkSemaphore requires GPU wait and signal operations * to have a one-to-one relationship. This formally described by saying * that the VkSemaphore gets implicitly reset on wait. However, it is * often useful to have well-defined multi-wait. If binary vk_sync * supports multi-wait then any number of kernel requests can be submitted * which wait on one signal operation. This also implies that you can * signal twice back-to-back (there are 0 waits on the first signal). * * This feature only applies to binary vk_sync objects. */ VK_SYNC_FEATURE_GPU_MULTI_WAIT = (1 << 3), /** Set if a sync type supports vk_sync_wait() and vk_sync_wait_many() */ VK_SYNC_FEATURE_CPU_WAIT = (1 << 4), /** Set if a sync type supports vk_sync_reset() * * This feature only applies to binary vk_sync objects. */ VK_SYNC_FEATURE_CPU_RESET = (1 << 5), /** Set if a sync type supports vk_sync_signal() */ VK_SYNC_FEATURE_CPU_SIGNAL = (1 << 6), /** Set if sync_type::wait_many supports the VK_SYNC_WAIT_ANY bit * * vk_sync_wait_many() will support the bit regardless. If the sync type * doesn't support it natively, it will be emulated. */ VK_SYNC_FEATURE_WAIT_ANY = (1 << 7), /** Set if a sync type supports the VK_SYNC_WAIT_PENDING bit * * See VK_SYNC_FEATURE_BINARY and VK_SYNC_FEATURE_TIMELINE for descriptions * of what this does in each case. */ VK_SYNC_FEATURE_WAIT_PENDING = (1 << 8), /** Set if a sync type natively supports wait-before-signal * * If this is set then the underlying OS primitive supports submitting * kernel requests which wait on the vk_sync before submitting a kernel * request which would cause that wait to unblock. */ VK_SYNC_FEATURE_WAIT_BEFORE_SIGNAL = (1 << 9), }; struct vk_sync_wait; enum vk_sync_wait_flags { /** Placeholder for 0 to make vk_sync_wait() calls more clear */ VK_SYNC_WAIT_COMPLETE = 0, /** If set, only wait for the vk_sync operation to be pending * * See VK_SYNC_FEATURE_BINARY and VK_SYNC_FEATURE_TIMELINE for descriptions * of what this does in each case. */ VK_SYNC_WAIT_PENDING = (1 << 0), /** If set, wait for any of of the vk_sync operations to complete * * This is as opposed to waiting for all of them. There is no guarantee * that vk_sync_wait_many() will return immediately after the first * operation completes but it will make a best effort to return as soon as * possible. */ VK_SYNC_WAIT_ANY = (1 << 1), }; struct vk_sync_type { /** Size of this sync type */ size_t size; /** Features supported by this sync type */ enum vk_sync_features features; /** Initialize a vk_sync * * The base vk_sync will already be initialized and the sync type set * before this function is called. If any OS primitives need to be * allocated, that should be done here. */ VkResult (*init)(struct vk_device *device, struct vk_sync *sync, uint64_t initial_value); /** Finish a vk_sync * * This should free any internal data stored in this vk_sync. */ void (*finish)(struct vk_device *device, struct vk_sync *sync); /** Signal a vk_sync * * For non-timeline sync types, value == 0. */ VkResult (*signal)(struct vk_device *device, struct vk_sync *sync, uint64_t value); /** Get the timeline value for a vk_sync */ VkResult (*get_value)(struct vk_device *device, struct vk_sync *sync, uint64_t *value); /** Reset a non-timeline vk_sync */ VkResult (*reset)(struct vk_device *device, struct vk_sync *sync); /** Moves the guts of one binary vk_sync to another * * This moves the current binary vk_sync event from src to dst and resets * src. If dst contained an event, it is discarded. * * This is required for all binary vk_sync types that can be used for a * semaphore wait in conjunction with real timeline semaphores. */ VkResult (*move)(struct vk_device *device, struct vk_sync *dst, struct vk_sync *src); /** Wait on a vk_sync * * For a timeline vk_sync, wait_value is the timeline value to wait for. * This function should not return VK_SUCCESS until get_value on that * vk_sync would return a value >= wait_value. A wait_value of zero is * allowed in which case the wait is a no-op. For a non-timeline vk_sync, * wait_value should be ignored. * * This function is optional. If the sync type needs to support CPU waits, * at least one of wait or wait_many must be provided. If one is missing, * it will be implemented in terms of the other. */ VkResult (*wait)(struct vk_device *device, struct vk_sync *sync, uint64_t wait_value, enum vk_sync_wait_flags wait_flags, uint64_t abs_timeout_ns); /** Wait for multiple vk_sync events * * If VK_SYNC_WAIT_ANY is set, it will return after at least one of the * wait events is complete instead of waiting for all of them. * * See wait for more details. */ VkResult (*wait_many)(struct vk_device *device, uint32_t wait_count, const struct vk_sync_wait *waits, enum vk_sync_wait_flags wait_flags, uint64_t abs_timeout_ns); /** Permanently imports the given FD into this vk_sync * * This replaces the guts of the given vk_sync with whatever is in the FD. * In a sense, this vk_sync now aliases whatever vk_sync the FD was * exported from. */ VkResult (*import_opaque_fd)(struct vk_device *device, struct vk_sync *sync, int fd); /** Export the guts of this vk_sync to an FD */ VkResult (*export_opaque_fd)(struct vk_device *device, struct vk_sync *sync, int *fd); /** Imports a sync file into this binary vk_sync * * If this completes successfully, the vk_sync will now signal whenever * the sync file signals. * * If sync_file == -1, the vk_sync should be signaled immediately. If * the vk_sync_type implements signal, sync_file will never be -1. */ VkResult (*import_sync_file)(struct vk_device *device, struct vk_sync *sync, int sync_file); /** Exports the current binary vk_sync state as a sync file. * * The resulting sync file will contain the current event stored in this * binary vk_sync must be turned into a sync file. If the vk_sync is later * modified to contain a new event, the sync file is unaffected. */ VkResult (*export_sync_file)(struct vk_device *device, struct vk_sync *sync, int *sync_file); /** Permanently imports the given handle or name into this vk_sync * * This replaces the guts of the given vk_sync with whatever is in the object. * In a sense, this vk_sync now aliases whatever vk_sync the handle was * exported from. */ VkResult (*import_win32_handle)(struct vk_device *device, struct vk_sync *sync, void *handle, const wchar_t *name); /** Export the guts of this vk_sync to a handle and/or name */ VkResult (*export_win32_handle)(struct vk_device *device, struct vk_sync *sync, void **handle); /** Vulkan puts these as creation params instead of export params */ VkResult (*set_win32_export_params)(struct vk_device *device, struct vk_sync *sync, const void *security_attributes, uint32_t access, const wchar_t *name); }; enum vk_sync_flags { /** Set if the vk_sync is a timeline */ VK_SYNC_IS_TIMELINE = (1 << 0), /** Set if the vk_sync can have its payload shared */ VK_SYNC_IS_SHAREABLE = (1 << 1), /** Set if the vk_sync has a shared payload */ VK_SYNC_IS_SHARED = (1 << 2), }; struct vk_sync { const struct vk_sync_type *type; enum vk_sync_flags flags; }; /* See VkSemaphoreSubmitInfo */ struct vk_sync_wait { struct vk_sync *sync; VkPipelineStageFlags2 stage_mask; uint64_t wait_value; }; /* See VkSemaphoreSubmitInfo */ struct vk_sync_signal { struct vk_sync *sync; VkPipelineStageFlags2 stage_mask; uint64_t signal_value; }; VkResult MUST_CHECK vk_sync_init(struct vk_device *device, struct vk_sync *sync, const struct vk_sync_type *type, enum vk_sync_flags flags, uint64_t initial_value); void vk_sync_finish(struct vk_device *device, struct vk_sync *sync); VkResult MUST_CHECK vk_sync_create(struct vk_device *device, const struct vk_sync_type *type, enum vk_sync_flags flags, uint64_t initial_value, struct vk_sync **sync_out); void vk_sync_destroy(struct vk_device *device, struct vk_sync *sync); VkResult MUST_CHECK vk_sync_signal(struct vk_device *device, struct vk_sync *sync, uint64_t value); VkResult MUST_CHECK vk_sync_get_value(struct vk_device *device, struct vk_sync *sync, uint64_t *value); VkResult MUST_CHECK vk_sync_reset(struct vk_device *device, struct vk_sync *sync); VkResult MUST_CHECK vk_sync_wait(struct vk_device *device, struct vk_sync *sync, uint64_t wait_value, enum vk_sync_wait_flags wait_flags, uint64_t abs_timeout_ns); VkResult MUST_CHECK vk_sync_wait_many(struct vk_device *device, uint32_t wait_count, const struct vk_sync_wait *waits, enum vk_sync_wait_flags wait_flags, uint64_t abs_timeout_ns); VkResult MUST_CHECK vk_sync_import_opaque_fd(struct vk_device *device, struct vk_sync *sync, int fd); VkResult MUST_CHECK vk_sync_export_opaque_fd(struct vk_device *device, struct vk_sync *sync, int *fd); VkResult MUST_CHECK vk_sync_import_sync_file(struct vk_device *device, struct vk_sync *sync, int sync_file); VkResult MUST_CHECK vk_sync_export_sync_file(struct vk_device *device, struct vk_sync *sync, int *sync_file); VkResult MUST_CHECK vk_sync_import_win32_handle(struct vk_device *device, struct vk_sync *sync, void *handle, const wchar_t *name); VkResult MUST_CHECK vk_sync_export_win32_handle(struct vk_device *device, struct vk_sync *sync, void **handle); VkResult MUST_CHECK vk_sync_set_win32_export_params(struct vk_device *device, struct vk_sync *sync, const void *security_attributes, uint32_t access, const wchar_t *name); VkResult MUST_CHECK vk_sync_move(struct vk_device *device, struct vk_sync *dst, struct vk_sync *src); #ifdef __cplusplus } #endif #endif /* VK_SYNC_H */