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Kernel: Fix PCI bridge enumeration

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The enumeration code is already enumerating all buses, recursively
enumerating bridges (which are buses) makes devices on bridges being
enumerated multiple times. Also, the PCI code was incorrectly mixing up
terminology; let's settle down on bus, device and function because ever
since PCIe came along "slots" isn't really a thing anymore.
This commit is contained in:
Jean-Baptiste Boric 2021-01-31 12:03:23 +01:00 • committed by Andreas Kling
parent 34508c0b01
commit 06d76a4717
6 changed files with 42 additions and 42 deletions
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8
Kernel/PCI/IOAccess.cpp
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@ -91,15 +91,15 @@ void IOAccess::enumerate_hardware(Function<void(Address, ID)> callback)
#endif
// Single PCI host controller.
if ((read8_field(Address(), PCI_HEADER_TYPE) & 0x80) == 0) {
enumerate_bus(-1, 0, callback);
enumerate_bus(-1, 0, callback, true);
return;
}
// Multiple PCI host controllers.
for (u8 function = 0; function < 8; ++function) {
if (read16_field(Address(0, 0, 0, function), PCI_VENDOR_ID) == PCI_NONE)
for (int bus = 0; bus < 256; ++bus) {
if (read16_field(Address(0, 0, 0, bus), PCI_VENDOR_ID) == PCI_NONE)
break;
enumerate_bus(-1, function, callback);
enumerate_bus(-1, bus, callback, false);
}
}