2021-01-20 16:34:16 +00:00
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/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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2021-04-22 08:24:48 +00:00
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* SPDX-License-Identifier: BSD-2-Clause
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2021-01-20 16:34:16 +00:00
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*/
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2021-08-06 08:45:34 +00:00
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#include <Kernel/Memory/ScatterGatherList.h>
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2021-01-20 16:34:16 +00:00
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2021-08-06 11:49:36 +00:00
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namespace Kernel::Memory {
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2021-01-20 16:34:16 +00:00
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2023-05-17 17:23:03 +00:00
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ErrorOr<LockRefPtr<ScatterGatherList>> ScatterGatherList::try_create(AsyncBlockDeviceRequest& request, Span<NonnullRefPtr<PhysicalPage>> allocated_pages, size_t device_block_size)
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2021-04-24 01:30:27 +00:00
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{
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2023-05-17 17:23:03 +00:00
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auto vm_object = TRY(AnonymousVMObject::try_create_with_physical_pages(allocated_pages));
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return adopt_lock_ref_if_nonnull(new (nothrow) ScatterGatherList(vm_object, request, device_block_size));
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2021-04-24 01:30:27 +00:00
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}
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2022-08-19 18:53:40 +00:00
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ScatterGatherList::ScatterGatherList(NonnullLockRefPtr<AnonymousVMObject> vm_object, AsyncBlockDeviceRequest& request, size_t device_block_size)
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2021-05-14 12:06:29 +00:00
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: m_vm_object(move(vm_object))
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2021-04-24 01:30:27 +00:00
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{
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2022-07-11 17:32:29 +00:00
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auto region_or_error = MM.allocate_kernel_region_with_vmobject(m_vm_object, page_round_up((request.block_count() * device_block_size)).release_value_but_fixme_should_propagate_errors(), "AHCI Scattered DMA"sv, Region::Access::Read | Region::Access::Write, Region::Cacheable::Yes);
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2021-09-05 23:36:14 +00:00
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if (region_or_error.is_error())
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TODO();
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m_dma_region = region_or_error.release_value();
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2021-04-24 01:30:27 +00:00
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}
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2021-01-20 16:34:16 +00:00
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}
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