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Revert "Revert "Kernel/Storage: Remove the ramdisk implementation""

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This reverts commit 187723776a.

This was reverted because it was needed until the aarch64 port
got an SD card driver

Co-authored-by: Ollrogge <nils-ollrogge@outlook.de>
This commit is contained in:
Marco Cutecchia 2023-03-21 22:08:12 +01:00 • committed by Linus Groh
parent d09852642c
commit 36c5afdfb2
9 changed files with 0 additions and 232 deletions
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2
Kernel/CMakeLists.txt
View file

@ -108,8 +108,6 @@ set(KERNEL_SOURCES
Storage/NVMe/NVMeInterruptQueue.cpp
Storage/NVMe/NVMePollQueue.cpp
Storage/NVMe/NVMeQueue.cpp
Storage/Ramdisk/Controller.cpp
Storage/Ramdisk/Device.cpp
Storage/SD/SDHostController.cpp
Storage/SD/SDMemoryCard.cpp
Storage/DiskPartition.cpp

67
Kernel/Storage/Ramdisk/Controller.cpp
View file

@ -1,67 +0,0 @@
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/OwnPtr.h>
#include <AK/Types.h>
#include <Kernel/Library/LockRefPtr.h>
#include <Kernel/Storage/Ramdisk/Controller.h>
namespace Kernel {
ErrorOr<NonnullRefPtr<RamdiskController>> RamdiskController::try_initialize()
{
return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) RamdiskController()));
}
ErrorOr<void> RamdiskController::reset()
{
return Error::from_errno(ENOTIMPL);
}
ErrorOr<void> RamdiskController::shutdown()
{
return Error::from_errno(ENOTIMPL);
}
size_t RamdiskController::devices_count() const
{
return m_devices.size();
}
void RamdiskController::complete_current_request(AsyncDeviceRequest::RequestResult)
{
VERIFY_NOT_REACHED();
}
RamdiskController::RamdiskController()
: StorageController(0)
{
// Populate ramdisk controllers from Multiboot boot modules, if any.
size_t count = 0;
MM.for_each_used_memory_range([&](auto& used_memory_range) {
if (used_memory_range.type == Memory::UsedMemoryRangeType::BootModule) {
size_t length = Memory::page_round_up(used_memory_range.end.get()).release_value_but_fixme_should_propagate_errors() - used_memory_range.start.get();
auto region_or_error = MM.allocate_kernel_region(used_memory_range.start, length, "Ramdisk"sv, Memory::Region::Access::ReadWrite);
if (region_or_error.is_error()) {
dmesgln("RamdiskController: Failed to allocate kernel region of size {}", length);
} else {
m_devices.append(RamdiskDevice::create(*this, region_or_error.release_value(), 6, count));
}
count++;
}
});
}
RamdiskController::~RamdiskController() = default;
LockRefPtr<StorageDevice> RamdiskController::device(u32 index) const
{
if (index >= m_devices.size())
return nullptr;
return m_devices[index];
}
}

36
Kernel/Storage/Ramdisk/Controller.h
View file

@ -1,36 +0,0 @@
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <AK/Types.h>
#include <Kernel/Library/LockRefPtr.h>
#include <Kernel/Storage/Ramdisk/Device.h>
#include <Kernel/Storage/StorageController.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
class AsyncBlockDeviceRequest;
class RamdiskController final : public StorageController {
public:
static ErrorOr<NonnullRefPtr<RamdiskController>> try_initialize();
virtual ~RamdiskController() override;
virtual LockRefPtr<StorageDevice> device(u32 index) const override;
virtual ErrorOr<void> reset() override;
virtual ErrorOr<void> shutdown() override;
virtual size_t devices_count() const override;
virtual void complete_current_request(AsyncDeviceRequest::RequestResult) override;
private:
RamdiskController();
Vector<NonnullLockRefPtr<RamdiskDevice>> m_devices;
};
}

60
Kernel/Storage/Ramdisk/Device.cpp
View file

@ -1,60 +0,0 @@
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Memory.h>
#include <AK/StringView.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/FileSystem/OpenFileDescription.h>
#include <Kernel/Storage/Ramdisk/Controller.h>
#include <Kernel/Storage/Ramdisk/Device.h>
namespace Kernel {
NonnullLockRefPtr<RamdiskDevice> RamdiskDevice::create(RamdiskController const& controller, NonnullOwnPtr<Memory::Region>&& region, int major, int minor)
{
auto device_or_error = DeviceManagement::try_create_device<RamdiskDevice>(controller, move(region), major, minor);
// FIXME: Find a way to propagate errors
VERIFY(!device_or_error.is_error());
return device_or_error.release_value();
}
RamdiskDevice::RamdiskDevice(RamdiskController const& controller, NonnullOwnPtr<Memory::Region>&& region, int major, int minor)
: StorageDevice({}, LUNAddress { controller.controller_id(), 0, 0 }, 0, major, minor, 512, region->size() / 512)
, m_region(move(region))
{
dmesgln("Ramdisk: Device #{} @ {}, Capacity={}", minor, m_region->vaddr(), max_addressable_block() * 512);
}
RamdiskDevice::~RamdiskDevice() = default;
StringView RamdiskDevice::class_name() const
{
return "RamdiskDevice"sv;
}
void RamdiskDevice::start_request(AsyncBlockDeviceRequest& request)
{
MutexLocker locker(m_lock);
u8* base = m_region->vaddr().as_ptr();
size_t size = m_region->size();
u8* offset = base + request.block_index() * request.block_size();
size_t length = request.buffer_size();
if ((offset + length > base + size) || (offset + length < base)) {
request.complete(AsyncDeviceRequest::Failure);
} else {
ErrorOr<void> result;
if (request.request_type() == AsyncBlockDeviceRequest::Read) {
result = request.buffer().write(offset, length);
} else {
result = request.buffer().read(offset, length);
}
request.complete(!result.is_error() ? AsyncDeviceRequest::Success : AsyncDeviceRequest::MemoryFault);
}
}
}

41
Kernel/Storage/Ramdisk/Device.h
View file

@ -1,41 +0,0 @@
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Locking/Mutex.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
class RamdiskController;
class RamdiskDevice final : public StorageDevice {
friend class RamdiskController;
friend class DeviceManagement;
public:
static NonnullLockRefPtr<RamdiskDevice> create(RamdiskController const&, NonnullOwnPtr<Memory::Region>&& region, int major, int minor);
virtual ~RamdiskDevice() override;
// ^DiskDevice
virtual StringView class_name() const override;
private:
RamdiskDevice(RamdiskController const&, NonnullOwnPtr<Memory::Region>&&, int major, int minor);
// ^BlockDevice
virtual void start_request(AsyncBlockDeviceRequest&) override;
// ^StorageDevice
virtual CommandSet command_set() const override { return CommandSet::PlainMemory; }
Mutex m_lock { "RamdiskDevice"sv };
NonnullOwnPtr<Memory::Region> m_region;
};
}

2
Kernel/Storage/StorageDevice.cpp
View file

@ -69,8 +69,6 @@ StringView StorageDevice::class_name() const
StringView StorageDevice::command_set_to_string_view() const
{
switch (command_set()) {
case CommandSet::PlainMemory:
return "memory"sv;
case CommandSet::SCSI:
return "scsi"sv;
case CommandSet::ATA:

1
Kernel/Storage/StorageDevice.h
View file

@ -34,7 +34,6 @@ public:
// and ATAPI is the exception to no-distinction rule. If we ever put SCSI support in the kernel,
// we can create another enum class to put the distinction.
enum class CommandSet {
PlainMemory,
SCSI,
ATA,
NVMe,

22
Kernel/Storage/StorageManagement.cpp
View file

@ -28,7 +28,6 @@
#include <Kernel/Storage/ATA/AHCI/Controller.h>
#include <Kernel/Storage/ATA/GenericIDE/Controller.h>
#include <Kernel/Storage/NVMe/NVMeController.h>
#include <Kernel/Storage/Ramdisk/Controller.h>
#include <Kernel/Storage/SD/SDHostController.h>
#include <Kernel/Storage/StorageManagement.h>
#include <LibPartition/EBRPartitionTable.h>
@ -53,7 +52,6 @@ static constexpr StringView block_device_prefix = "block"sv;
static constexpr StringView ata_device_prefix = "ata"sv;
static constexpr StringView nvme_device_prefix = "nvme"sv;
static constexpr StringView ramdisk_device_prefix = "ramdisk"sv;
static constexpr StringView logical_unit_number_device_prefix = "lun"sv;
UNMAP_AFTER_INIT StorageManagement::StorageManagement()
@ -304,13 +302,6 @@ UNMAP_AFTER_INIT void StorageManagement::determine_nvme_boot_device()
});
}
UNMAP_AFTER_INIT void StorageManagement::determine_ramdisk_boot_device()
{
determine_hardware_relative_boot_device(ramdisk_device_prefix, [](StorageDevice const& device) -> bool {
return device.command_set() == StorageDevice::CommandSet::PlainMemory;
});
}
UNMAP_AFTER_INIT void StorageManagement::determine_block_boot_device()
{
VERIFY(m_boot_argument.starts_with(block_device_prefix));
@ -370,11 +361,6 @@ UNMAP_AFTER_INIT void StorageManagement::determine_boot_device()
return;
}
if (m_boot_argument.starts_with(ramdisk_device_prefix)) {
determine_ramdisk_boot_device();
return;
}
if (m_boot_argument.starts_with(nvme_device_prefix)) {
determine_nvme_boot_device();
return;
@ -468,14 +454,6 @@ UNMAP_AFTER_INIT void StorageManagement::initialize(StringView root_device, bool
}
#endif
// Note: Whether PCI bus is present on the system or not, always try to attach
// a given ramdisk.
auto controller = RamdiskController::try_initialize();
if (controller.is_error()) {
dmesgln("Unable to initialize RAM controller: {}", controller.error());
} else {
m_controllers.append(controller.release_value());
}
enumerate_storage_devices();
enumerate_disk_partitions();

1
Kernel/Storage/StorageManagement.h
View file

@ -53,7 +53,6 @@ private:
void resolve_partition_from_boot_device_parameter(StorageDevice const& chosen_storage_device, StringView boot_device_prefix);
void determine_boot_device_with_logical_unit_number();
void determine_block_boot_device();
void determine_ramdisk_boot_device();
void determine_nvme_boot_device();
void determine_ata_boot_device();
void determine_hardware_relative_boot_device(StringView relative_hardware_prefix, Function<bool(StorageDevice const&)> filter_device_callback);