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Kernel/Storage: Don't try to enumerate PCI adapters if PCI is disabled

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If there's no PCI bus, then it's safe to assume that we run on a x86
machine that has an ISA IDE controller in the system. In such case, we
just instantiate a ISAIDEController object that assumes fixed locations
of IDE IO ports.
This commit is contained in:
Liav A 2022-01-21 16:18:31 +02:00 • committed by Andreas Kling
parent fafa339264
commit 30eeba1981
11 changed files with 283 additions and 142 deletions
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19
Kernel/Storage/StorageManagement.cpp
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@ -16,7 +16,8 @@
#include <Kernel/FileSystem/Ext2FileSystem.h>
#include <Kernel/Panic.h>
#include <Kernel/Storage/ATA/AHCIController.h>
#include <Kernel/Storage/ATA/IDEController.h>
#include <Kernel/Storage/ATA/ISAIDEController.h>
#include <Kernel/Storage/ATA/PCIIDEController.h>
#include <Kernel/Storage/NVMe/NVMeController.h>
#include <Kernel/Storage/Partition/EBRPartitionTable.h>
#include <Kernel/Storage/Partition/GUIDPartitionTable.h>
@ -45,7 +46,7 @@ bool StorageManagement::boot_argument_contains_partition_uuid()
return m_boot_argument.starts_with(partition_uuid_prefix);
}
UNMAP_AFTER_INIT void StorageManagement::enumerate_controllers(bool force_pio, bool nvme_poll)
UNMAP_AFTER_INIT void StorageManagement::enumerate_pci_controllers(bool force_pio, bool nvme_poll)
{
VERIFY(m_controllers.is_empty());
@ -77,7 +78,7 @@ UNMAP_AFTER_INIT void StorageManagement::enumerate_controllers(bool force_pio, b
auto subclass_code = static_cast<SubclassID>(device_identifier.subclass_code().value());
if (subclass_code == SubclassID::IDEController && kernel_command_line().is_ide_enabled()) {
m_controllers.append(IDEController::initialize(device_identifier, force_pio));
m_controllers.append(PCIIDEController::initialize(device_identifier, force_pio));
}
if (subclass_code == SubclassID::SATAController
@ -94,7 +95,6 @@ UNMAP_AFTER_INIT void StorageManagement::enumerate_controllers(bool force_pio, b
}
});
}
m_controllers.append(RamdiskController::initialize());
}
UNMAP_AFTER_INIT void StorageManagement::enumerate_storage_devices()
@ -273,7 +273,16 @@ UNMAP_AFTER_INIT void StorageManagement::initialize(StringView root_device, bool
{
VERIFY(s_device_minor_number == 0);
m_boot_argument = root_device;
enumerate_controllers(force_pio, poll);
if (PCI::Access::is_disabled()) {
// Note: If PCI is disabled, we assume that at least we have an ISA IDE controller
// to probe and use
m_controllers.append(ISAIDEController::initialize());
} else {
enumerate_pci_controllers(force_pio, poll);
}
// Note: Whether PCI bus is present on the system or not, always try to attach
// a given ramdisk.
m_controllers.append(RamdiskController::initialize());
enumerate_storage_devices();
enumerate_disk_partitions();
if (!boot_argument_contains_partition_uuid()) {