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Kernel: Add MSIInfo struct to PCI DeviceIdentifier

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Add a struct named MSIInfo that stores all the relevant MSI
information as a part of PCI DeviceIdentifier struct.
Populate the MSI struct during the PCI device init.
This commit is contained in:
Pankaj Raghav 2023-05-08 21:24:07 +02:00 • committed by Jelle Raaijmakers
commit 09b5cefd43
Notes: sideshowbarker 2024-07-16 20:08:16 +09:00
2 changed files with 30 additions and 2 deletions
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10
Kernel/Bus/PCI/DeviceIdentifier.cpp
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@ -26,7 +26,15 @@ void DeviceIdentifier::initialize()
auto msix_count = (cap.read16(2) & msix_control_table_mask) + 1;
m_msix_info = MSIxInfo(msix_count, msix_bir_bar, msix_bir_offset);
}
if (cap.id() == PCI::Capabilities::ID::MSI) {
bool message_address_64_bit_format = (cap.read8(msi_control_offset) & msi_address_format_mask);
u8 count = 1;
u8 mme_count = (cap.read8(msi_control_offset) & msi_mmc_format_mask) >> 1;
if (mme_count)
count = mme_count;
m_msi_info = MSIInfo(message_address_64_bit_format, count);
}
}
}
}