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#################################################################################################
#
# Copyright (c) 2017 - 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: BSD-3-Clause
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#################################################################################################
import ctypes
from cuda import __version__, cuda
from cutlass.backend.utils.device import device_cc
_version_splits = [int(x) for x in __version__.split("rc")[0].split(".")]
_supports_cluster_launch = None
def supports_cluster_launch():
global _supports_cluster_launch
if _supports_cluster_launch is None:
major, minor = _version_splits[0], _version_splits[1]
_supports_cluster_launch = device_cc() >= 90 and (major > 11 or (major == 11 and minor >= 8))
return _supports_cluster_launch
class LaunchConfiguration:
def __init__(self, grid=[1, 1, 1], block=[1, 1, 1], smem=0):
self.grid = grid
self.block = block
self.shared_memory_capacity = smem
class ExecutableOperation:
def __init__(self, operation):
self.operation = operation
self.module = None
self.kernel = None
def name(self):
return self.operation.procedural_name()
def emit(self):
return ""
def can_implement(self, configuration, arguments):
raise NotImplementedError()
def get_host_workspace_size(self, arguments):
raise NotImplementedError()
def get_device_workspace_size(self, arguments):
raise NotImplementedError()
def plan(self, arguments):
raise NotImplementedError()
def initialize(self, host_workspace, device_workspace, launch_config, arguments, stream=cuda.CUstream(0)):
raise NotImplementedError()
def run_with_clusters(self, launch_config, kernel_params, stream=cuda.CUstream(0)):
if hasattr(self.operation, "tile_description") and hasattr(self.operation.tile_description, "cluster_shape"):
attr = cuda.CUlaunchAttribute()
attr.value.clusterDim.x, attr.value.clusterDim.y, attr.value.clusterDim.z = self.operation.tile_description.cluster_shape
attr.id = cuda.CUstreamAttrID.CU_LAUNCH_ATTRIBUTE_CLUSTER_DIMENSION
attrs = [attr]
# Allow for non-portable cluster sizes
err, = cuda.cuFuncSetAttribute(
self.kernel, cuda.CUfunction_attribute.CU_FUNC_ATTRIBUTE_NON_PORTABLE_CLUSTER_SIZE_ALLOWED, 1)
if err != cuda.CUresult.CUDA_SUCCESS:
return err
else:
attrs = []
config = cuda.CUlaunchConfig()
config.gridDimX, config.gridDimY, config.gridDimZ = launch_config.grid
config.blockDimX, config.blockDimY, config.blockDimZ = launch_config.block
config.blockDimZ = launch_config.block[2]
config.sharedMemBytes = launch_config.shared_memory_capacity
config.hStream = stream
config.attrs = attrs
config.numAttrs = len(attrs)
err, = cuda.cuLaunchKernelEx(
config, f=self.kernel, kernelParams=kernel_params, extra=0)
return err
def run_without_clusters(self, launch_config, kernel_params, stream=cuda.CUstream(0)):
err, = cuda.cuLaunchKernel(
self.kernel,
launch_config.grid[0], launch_config.grid[1], launch_config.grid[2],
launch_config.block[0], launch_config.block[1], launch_config.block[2],
launch_config.shared_memory_capacity,
stream,
kernel_params,
0)
return err
def run(self, host_workspace, device_workspace, launch_config, stream=cuda.CUstream(0)):
cArg = (ctypes.c_char * len(host_workspace)).from_buffer(host_workspace)
packed = (ctypes.c_void_p * 1)()
packed[0] = ctypes.addressof(cArg)
if supports_cluster_launch():
return self.run_with_clusters(launch_config, packed, stream)
else:
return self.run_without_clusters(launch_config, packed, stream)
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