mirror of
https://github.com/RGBCube/serenity
synced 2025-05-20 05:15:06 +00:00
d0fbaf790a
Add a struct named MSIxInfo that stores all the relevant MSIx information as a part of PCI DeviceIdentifier struct. Populate the MSIx struct during the PCI device init. As the DeviceIdentifier struct need to populate MSIx info, don't mark DeviceIdentifier as const in the PCI::Device class.
32 lines
958 B
C++
32 lines
958 B
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/AnyOf.h>
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#include <AK/Error.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefPtr.h>
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#include <Kernel/Bus/PCI/Definitions.h>
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namespace Kernel::PCI {
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ErrorOr<NonnullRefPtr<DeviceIdentifier>> DeviceIdentifier::from_enumerable_identifier(EnumerableDeviceIdentifier const& other_identifier)
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{
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return adopt_nonnull_ref_or_enomem(new (nothrow) DeviceIdentifier(other_identifier));
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}
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void DeviceIdentifier::initialize()
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{
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for (auto cap : capabilities()) {
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if (cap.id() == PCI::Capabilities::ID::MSIX) {
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auto msix_bir_bar = (cap.read8(4) & msix_table_bir_mask);
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auto msix_bir_offset = (cap.read32(4) & msix_table_offset_mask);
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auto msix_count = (cap.read16(2) & msix_control_table_mask) + 1;
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m_msix_info = MSIxInfo(msix_count, msix_bir_bar, msix_bir_offset);
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}
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}
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}
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}
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