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Kernel: Add MSIxInfo struct to PCI DeviceIdentifier

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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.
This commit is contained in:
Pankaj Raghav 2023-04-28 15:16:20 +02:00 • committed by Jelle Raaijmakers
parent 71c75873c9
commit d0fbaf790a
4 changed files with 39 additions and 1 deletions
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12
Kernel/Bus/PCI/DeviceIdentifier.cpp
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@ -17,4 +17,16 @@ ErrorOr<NonnullRefPtr<DeviceIdentifier>> DeviceIdentifier::from_enumerable_ident
return adopt_nonnull_ref_or_enomem(new (nothrow) DeviceIdentifier(other_identifier));
}
void DeviceIdentifier::initialize()
{
for (auto cap : capabilities()) {
if (cap.id() == PCI::Capabilities::ID::MSIX) {
auto msix_bir_bar = (cap.read8(4) & msix_table_bir_mask);
auto msix_bir_offset = (cap.read32(4) & msix_table_offset_mask);
auto msix_count = (cap.read16(2) & msix_control_table_mask) + 1;
m_msix_info = MSIxInfo(msix_count, msix_bir_bar, msix_bir_offset);
}
}
}
}