60 lines
3.1 KiB
TableGen
60 lines
3.1 KiB
TableGen
//===-- Kernel.td - Kernel definitions for Offload ---------*- tablegen -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains Offload API definitions related to kernels
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//
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//===----------------------------------------------------------------------===//
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def ol_kernel_launch_size_args_t : Struct {
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let desc = "Size-related arguments for a kernel launch.";
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let members = [
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StructMember<"size_t", "Dimensions", "Number of work dimensions">,
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StructMember<"struct ol_dimensions_t", "NumGroups", "Number of work groups in each dimension">,
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StructMember<"struct ol_dimensions_t", "GroupSize", "Size of a work group in each dimension">,
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StructMember<"size_t", "DynSharedMemory", "Size of dynamic shared memory in bytes.">
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];
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}
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def olLaunchKernel : Function {
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let desc = "Enqueue a kernel launch with the specified size and parameters.";
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let details = [
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"If a queue is not specified, kernel execution happens synchronously",
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"ArgumentsData may be set to NULL (to indicate no parameters)"
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];
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let params = [
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Param<"ol_queue_handle_t", "Queue", "handle of the queue", PARAM_IN_OPTIONAL>,
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Param<"ol_device_handle_t", "Device", "handle of the device to execute on", PARAM_IN>,
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Param<"ol_symbol_handle_t", "Kernel", "handle of the kernel", PARAM_IN>,
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Param<"const void*", "ArgumentsData", "pointer to the kernel argument struct", PARAM_IN_OPTIONAL>,
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Param<"size_t", "ArgumentsSize", "size of the kernel argument struct", PARAM_IN>,
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Param<"const ol_kernel_launch_size_args_t*", "LaunchSizeArgs", "pointer to the struct containing launch size parameters", PARAM_IN>,
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];
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let returns = [
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Return<"OL_ERRC_INVALID_ARGUMENT", ["`ArgumentsSize > 0 && ArgumentsData == NULL`"]>,
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Return<"OL_ERRC_INVALID_DEVICE", ["If Queue is non-null but does not belong to Device"]>,
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Return<"OL_ERRC_SYMBOL_KIND", ["The provided symbol is not a kernel"]>,
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];
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}
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def olCalculateOptimalOccupancy : Function {
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let desc = "Given dynamic memory size, query the device for a workgroup size that will result in optimal occupancy.";
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let details = [
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"For most devices, this will be the largest workgroup size that will result in all work items fitting on the device at once.",
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];
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let params = [
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Param<"ol_device_handle_t", "Device", "device intended to run the kernel", PARAM_IN>,
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Param<"ol_symbol_handle_t", "Kernel", "handle of the kernel", PARAM_IN>,
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Param<"size_t", "SharedMemory", "dynamic shared memory required per work item in bytes", PARAM_IN>,
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Param<"size_t*", "GroupSize", "optimal block size", PARAM_OUT>
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];
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let returns = [
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Return<"OL_ERRC_SYMBOL_KIND", ["The provided symbol is not a kernel"]>,
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Return<"OL_ERRC_UNSUPPORTED", ["The backend cannot provide this information"]>,
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];
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}
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