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pci/ecam: Fix reading config registers using ACPI method.

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Also adjust end-address computation: we read up to 4 bytes past the offset.

Change-Id: I76343aba38cddb614394bd0dca1b36094b8dd85e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6469
Reviewed-by: waddlesplash <[email protected]>
Reviewed-by: X512 <[email protected]>
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: Adrien Destugues <[email protected]>
This commit is contained in:
Augustin Cavalier
2023-05-25 17:35:53 +00:00
committed by waddlesplash
parent 769b4ee4aa
commit 19ae638fb6
2 changed files with 3 additions and 5 deletions
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src/add-ons/kernel/busses/pci/ecam/ECAMPCIController.cpp
+1 -4
View File
@@ -166,10 +166,7 @@ ECAMPCIController::ConfigAddress(uint8 bus, uint8 device, uint8 function, uint16
.device = device,
.bus = bus
};
PciAddressEcam addressEnd = address;
addressEnd.offset = /*~(uint32)0*/ 4095;
if (addressEnd.val >= fRegsLen)
if ((address.val + 4) > fRegsLen)
return 0;
return (addr_t)fRegs + address.val;
src/add-ons/kernel/busses/pci/ecam/ECAMPCIControllerACPI.cpp
+2 -1
View File
@@ -57,8 +57,9 @@ ECAMPCIControllerACPI::ReadResourceInfo()
uint8 startBusNumber = alloc->start_bus_number;
uint8 endBusNumber = alloc->end_bus_number;
fRegsLen = (endBusNumber - startBusNumber + 1) << 20;
fRegsArea.SetTo(map_physical_memory("PCI Config MMIO",
alloc->address, (endBusNumber - startBusNumber + 1) << 20, B_ANY_KERNEL_ADDRESS,
alloc->address, fRegsLen, B_ANY_KERNEL_ADDRESS,
B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA, (void **)&fRegs));
CHECK_RET(fRegsArea.Get());