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/*
* Copyright (C) 2018-2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#pragma once
#include "shared/source/built_ins/built_ins.h"
#include "shared/source/command_stream/command_stream_receiver.h"
#include "shared/source/helpers/cache_policy.h"
#include "shared/source/helpers/engine_node_helper.h"
#include "shared/source/memory_manager/unified_memory_manager.h"
#include "shared/source/os_interface/os_context.h"
#include "opencl/source/command_queue/command_queue_hw.h"
#include "opencl/source/command_queue/enqueue_common.h"
#include "opencl/source/helpers/hardware_commands_helper.h"
#include "opencl/source/mem_obj/buffer.h"
#include "opencl/source/memory_manager/mem_obj_surface.h"
#include <new>
namespace NEO {
template <typename GfxFamily>
cl_int CommandQueueHw<GfxFamily>::enqueueReadBuffer(
Buffer *buffer,
cl_bool blockingRead,
size_t offset,
size_t size,
void *ptr,
GraphicsAllocation *mapAllocation,
cl_uint numEventsInWaitList,
const cl_event *eventWaitList,
cl_event *event) {
const cl_command_type cmdType = CL_COMMAND_READ_BUFFER;
CsrSelectionArgs csrSelectionArgs{cmdType, buffer, {}, device->getRootDeviceIndex(), &size};
CommandStreamReceiver &csr = selectCsrForBuiltinOperation(csrSelectionArgs);
return enqueueReadBufferImpl(buffer, blockingRead, offset, size, ptr, mapAllocation, numEventsInWaitList, eventWaitList, event, csr);
}
template <typename GfxFamily>
cl_int CommandQueueHw<GfxFamily>::enqueueReadBufferImpl(
Buffer *buffer,
cl_bool blockingRead,
size_t offset,
size_t size,
void *ptr,
GraphicsAllocation *mapAllocation,
cl_uint numEventsInWaitList,
const cl_event *eventWaitList,
cl_event *event, CommandStreamReceiver &csr) {
const cl_command_type cmdType = CL_COMMAND_READ_BUFFER;
CsrSelectionArgs csrSelectionArgs{cmdType, buffer, {}, device->getRootDeviceIndex(), &size};
if (nullptr == mapAllocation) {
notifyEnqueueReadBuffer(buffer, !!blockingRead, EngineHelpers::isBcs(csr.getOsContext().getEngineType()));
}
auto rootDeviceIndex = getDevice().getRootDeviceIndex();
bool isMemTransferNeeded = buffer->isMemObjZeroCopy() ? buffer->checkIfMemoryTransferIsRequired(offset, 0, ptr, cmdType) : true;
bool isCpuCopyAllowed = bufferCpuCopyAllowed(buffer, cmdType, blockingRead, size, ptr,
numEventsInWaitList, eventWaitList);
InternalMemoryType memoryType = InternalMemoryType::notSpecified;
if (!mapAllocation) {
cl_int retVal = getContext().tryGetExistingHostPtrAllocation(ptr, size, rootDeviceIndex, mapAllocation, memoryType, isCpuCopyAllowed);
if (retVal != CL_SUCCESS) {
return retVal;
}
}
if (isCpuCopyAllowed) {
if (isMemTransferNeeded) {
return enqueueReadWriteBufferOnCpuWithMemoryTransfer(cmdType, buffer, offset, size, ptr,
numEventsInWaitList, eventWaitList, event);
} else {
return enqueueReadWriteBufferOnCpuWithoutMemoryTransfer(cmdType, buffer, offset, size, ptr,
numEventsInWaitList, eventWaitList, event);
}
} else if (!isMemTransferNeeded) {
return enqueueMarkerForReadWriteOperation(buffer, ptr, cmdType, blockingRead,
numEventsInWaitList, eventWaitList, event);
}
const bool isStateless = forceStateless(buffer->getSize());
const bool useHeapless = this->getHeaplessModeEnabled();
auto builtInType = EBuiltInOps::adjustBuiltinType<EBuiltInOps::copyBufferToBuffer>(isStateless, useHeapless);
void *dstPtr = ptr;
MemObjSurface bufferSurf(buffer);
HostPtrSurface hostPtrSurf(dstPtr, size);
GeneralSurface mapSurface;
Surface *surfaces[] = {&bufferSurf, nullptr};
auto bcsSplit = this->isSplitEnqueueBlitNeeded(csrSelectionArgs.direction, size, csr);
if (mapAllocation) {
surfaces[1] = &mapSurface;
mapSurface.setGraphicsAllocation(mapAllocation);
dstPtr = convertAddressWithOffsetToGpuVa(dstPtr, memoryType, *mapAllocation);
} else {
surfaces[1] = &hostPtrSurf;
if (size != 0) {
bool status = selectCsrForHostPtrAllocation(bcsSplit, csr).createAllocationForHostSurface(hostPtrSurf, true);
if (!status) {
return CL_OUT_OF_RESOURCES;
}
this->prepareHostPtrSurfaceForSplit(bcsSplit, *hostPtrSurf.getAllocation());
dstPtr = reinterpret_cast<void *>(hostPtrSurf.getAllocation()->getGpuAddress());
}
}
void *alignedDstPtr = alignDown(dstPtr, 4);
size_t dstPtrOffset = ptrDiff(dstPtr, alignedDstPtr);
BuiltinOpParams dc;
dc.dstPtr = alignedDstPtr;
dc.dstOffset = {dstPtrOffset, 0, 0};
dc.srcMemObj = buffer;
dc.srcOffset = {offset, 0, 0};
dc.size = {size, 0, 0};
dc.transferAllocation = mapAllocation ? mapAllocation : hostPtrSurf.getAllocation();
dc.bcsSplit = bcsSplit;
dc.direction = csrSelectionArgs.direction;
MultiDispatchInfo dispatchInfo(dc);
if (context->isProvidingPerformanceHints()) {
context->providePerformanceHintForMemoryTransfer(CL_COMMAND_READ_BUFFER, true, static_cast<cl_mem>(buffer), ptr);
if (!isL3Capable(ptr, size)) {
context->providePerformanceHint(CL_CONTEXT_DIAGNOSTICS_LEVEL_BAD_INTEL, CL_ENQUEUE_READ_BUFFER_DOESNT_MEET_ALIGNMENT_RESTRICTIONS, ptr, size, MemoryConstants::pageSize, MemoryConstants::pageSize);
}
}
return dispatchBcsOrGpgpuEnqueue<CL_COMMAND_READ_BUFFER>(dispatchInfo, surfaces, builtInType, numEventsInWaitList, eventWaitList, event, blockingRead, csr);
}
} // namespace NEO
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