mirror of
https://github.com/RGBCube/serenity
synced 2025-05-17 20:45:09 +00:00
86 lines
3.5 KiB
C++
86 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/ByteReader.h>
|
|
#include <Kernel/Arch/x86/IO.h>
|
|
#include <Kernel/Bus/PCI/API.h>
|
|
#include <Kernel/Bus/PCI/Access.h>
|
|
#include <Kernel/Bus/PCI/Controller/VolumeManagementDevice.h>
|
|
|
|
namespace Kernel::PCI {
|
|
|
|
static Atomic<u32> s_vmd_pci_domain_number = 0x10000;
|
|
|
|
NonnullOwnPtr<VolumeManagementDevice> VolumeManagementDevice::must_create(PCI::DeviceIdentifier const& device_identifier)
|
|
{
|
|
u8 start_bus = 0;
|
|
switch ((PCI::read16(device_identifier.address(), static_cast<PCI::RegisterOffset>(0x44)) >> 8) & 0x3) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
start_bus = 128;
|
|
break;
|
|
case 2:
|
|
start_bus = 224;
|
|
break;
|
|
default:
|
|
dbgln("VMD @ {}: Unknown bus offset option was set to {}", device_identifier.address(),
|
|
((PCI::read16(device_identifier.address(), static_cast<PCI::RegisterOffset>(0x44)) >> 8) & 0x3));
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
// FIXME: The end bus might not be 255, so we actually need to check it with the
|
|
// resource size of BAR0.
|
|
dbgln("VMD Host bridge @ {}: Start bus at {}, end bus {}", device_identifier.address(), start_bus, 0xff);
|
|
PCI::Domain domain { s_vmd_pci_domain_number++, start_bus, 0xff };
|
|
auto start_address = PhysicalAddress(PCI::get_BAR0(device_identifier.address())).page_base();
|
|
return adopt_own_if_nonnull(new (nothrow) VolumeManagementDevice(domain, start_address)).release_nonnull();
|
|
}
|
|
|
|
void VolumeManagementDevice::write8_field(BusNumber bus, DeviceNumber device, FunctionNumber function, u32 field, u8 value)
|
|
{
|
|
SpinlockLocker locker(m_config_lock);
|
|
// Note: We must write then read to ensure completion before returning.
|
|
MemoryBackedHostBridge::write8_field(bus, device, function, field, value);
|
|
MemoryBackedHostBridge::read8_field(bus, device, function, field);
|
|
}
|
|
void VolumeManagementDevice::write16_field(BusNumber bus, DeviceNumber device, FunctionNumber function, u32 field, u16 value)
|
|
{
|
|
SpinlockLocker locker(m_config_lock);
|
|
// Note: We must write then read to ensure completion before returning.
|
|
MemoryBackedHostBridge::write16_field(bus, device, function, field, value);
|
|
MemoryBackedHostBridge::read16_field(bus, device, function, field);
|
|
}
|
|
void VolumeManagementDevice::write32_field(BusNumber bus, DeviceNumber device, FunctionNumber function, u32 field, u32 value)
|
|
{
|
|
SpinlockLocker locker(m_config_lock);
|
|
// Note: We must write then read to ensure completion before returning.
|
|
MemoryBackedHostBridge::write32_field(bus, device, function, field, value);
|
|
MemoryBackedHostBridge::read32_field(bus, device, function, field);
|
|
}
|
|
|
|
u8 VolumeManagementDevice::read8_field(BusNumber bus, DeviceNumber device, FunctionNumber function, u32 field)
|
|
{
|
|
SpinlockLocker locker(m_config_lock);
|
|
return MemoryBackedHostBridge::read8_field(bus, device, function, field);
|
|
}
|
|
u16 VolumeManagementDevice::read16_field(BusNumber bus, DeviceNumber device, FunctionNumber function, u32 field)
|
|
{
|
|
SpinlockLocker locker(m_config_lock);
|
|
return MemoryBackedHostBridge::read16_field(bus, device, function, field);
|
|
}
|
|
u32 VolumeManagementDevice::read32_field(BusNumber bus, DeviceNumber device, FunctionNumber function, u32 field)
|
|
{
|
|
SpinlockLocker locker(m_config_lock);
|
|
return MemoryBackedHostBridge::read32_field(bus, device, function, field);
|
|
}
|
|
|
|
VolumeManagementDevice::VolumeManagementDevice(PCI::Domain const& domain, PhysicalAddress start_address)
|
|
: MemoryBackedHostBridge(domain, start_address)
|
|
{
|
|
}
|
|
|
|
}
|