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Kernel: Introduce the new Storage subsystem

Browse Source 
This new subsystem is somewhat replacing the IDE disk code we had with a
new flexible design.

StorageDevice is a generic class that represent a generic storage
device. It is meant that specific storage hardware will override the
interface. StorageController is a generic class that represent
a storage controller that can be found in a machine.

The IDEController class governs two IDEChannels. An IDEChannel is
responsible to manage the master & slave devices of the channel,
therefore an IDEChannel is an IRQHandler.
This commit is contained in:
Liav A 2020-12-19 12:50:57 +02:00 committed by Andreas Kling
parent 39c1783387
commit 0a2b00a1bf
Notes: sideshowbarker 2024-07-19 00:42:24 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/0a2b00a1bf6
Pull-request: https://github.com/SerenityOS/serenity/pull/4462
12 changed files with 604 additions and 213 deletions
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2
CMakeLists.txt
View File

@ -68,7 +68,7 @@ if (ALL_THE_DEBUG_MACROS)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DOBJECT_DEBUG -DOCCLUSIONS_DEBUG -DOFFD_DEBUG")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DPAGE_FAULT_DEBUG -DPARSER_DEBUG -DPATA_DEBUG -DPATA_DEVICE_DEBUG -DPATH_DEBUG -DPCI_DEBUG -DPNG_DEBUG -DPPM_DEBUG -DPROCESS_DEBUG -DPROCFS_DEBUG -DPS2MOUSE_DEBUG -DPTHREAD_DEBUG -DPTMX_DEBUG")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DREACHABLE_DEBUG -DREGEX_DEBUG -DRESIZE_DEBUG -DRESOURCE_DEBUG -DROUTING_DEBUG -DRTL8139_DEBUG")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DSAFE_SYSCALL_DEBUG -DSB16_DEBUG -DSCHEDULER_DEBUG -DSCHEDULER_RUNNABLE_DEBUG -DSELECTION_DEBUG -DSERVICE_DEBUG -DSHARED_BUFFER_DEBUG -DSH_DEBUG -DSIGNAL_DEBUG -DSLAVEPTY_DEBUG -DSMP_DEBUG -DSOCKET_DEBUG -DSYSTEM_MENU_DEBUG -DSYSTEMSERVER_DEBUG")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DSAFE_SYSCALL_DEBUG -DSB16_DEBUG -DSCHEDULER_DEBUG -DSCHEDULER_RUNNABLE_DEBUG -DSELECTION_DEBUG -DSERVICE_DEBUG -DSHARED_BUFFER_DEBUG -DSH_DEBUG -DSIGNAL_DEBUG -DSLAVEPTY_DEBUG -DSMP_DEBUG -DSOCKET_DEBUG -DSYSTEM_MENU_DEBUG -DSYSTEMSERVER_DEBUG -DSTORAGE_DEVICE_DEBUG")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DTCP_DEBUG -DTCP_SOCKET_DEBUG -DTERMCAP_DEBUG -DTERMINAL_DEBUG -DTHREAD_DEBUG -DTLS_DEBUG -DTTY_DEBUG")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DUCI_DEBUG -DUDP_DEBUG -DUPDATE_COALESCING_DEBUG")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DVERY_DEBUG -DVFS_DEBUG -DVMWAREBACKDOOR_DEBUG -DVRA_DEBUG")

6
Kernel/CMakeLists.txt
View File

@ -31,8 +31,6 @@ set(KERNEL_SOURCES
Devices/MBRPartitionTable.cpp
Devices/MBVGADevice.cpp
Devices/NullDevice.cpp
Devices/PATAChannel.cpp
Devices/PATADiskDevice.cpp
Devices/PCSpeaker.cpp
Devices/PS2MouseDevice.cpp
Devices/RandomDevice.cpp
@ -41,6 +39,10 @@ set(KERNEL_SOURCES
Devices/UHCIController.cpp
Devices/VMWareBackdoor.cpp
Devices/ZeroDevice.cpp
Storage/StorageDevice.cpp
Storage/IDEController.cpp
Storage/IDEChannel.cpp
Storage/PATADiskDevice.cpp
DoubleBuffer.cpp
FileSystem/BlockBasedFileSystem.cpp
FileSystem/Custody.cpp

267
Kernel/Devices/PATAChannel.cpp → Kernel/Storage/IDEChannel.cpp
View File

@ -27,11 +27,12 @@
#include <AK/ByteBuffer.h>
#include <AK/Singleton.h>
#include <AK/StringView.h>
#include <Kernel/Devices/PATAChannel.h>
#include <Kernel/Devices/PATADiskDevice.h>
#include <Kernel/FileSystem/ProcFS.h>
#include <Kernel/IO.h>
#include <Kernel/Process.h>
#include <Kernel/Storage/IDEChannel.h>
#include <Kernel/Storage/IDEController.h>
#include <Kernel/Storage/PATADiskDevice.h>
#include <Kernel/VM/MemoryManager.h>
namespace Kernel {
@ -108,24 +109,25 @@ namespace Kernel {
#define PCI_Mass_Storage_Class 0x1
#define PCI_IDE_Controller_Subclass 0x1
OwnPtr<PATAChannel> PATAChannel::create(ChannelType type, bool force_pio)
NonnullOwnPtr<IDEChannel> IDEChannel::create(const IDEController& controller, IOAddressGroup io_group, ChannelType type, bool force_pio)
{
PCI::Address pci_address;
PCI::enumerate([&](const PCI::Address& address, PCI::ID id) {
if (PCI::get_class(address) == PCI_Mass_Storage_Class && PCI::get_subclass(address) == PCI_IDE_Controller_Subclass) {
pci_address = address;
klog() << "PATAChannel: PATA Controller found, ID " << id;
}
});
return make<PATAChannel>(pci_address, type, force_pio);
return make<IDEChannel>(controller, io_group, type, force_pio);
}
PATAChannel::PATAChannel(PCI::Address address, ChannelType type, bool force_pio)
: PCI::Device(address, (type == ChannelType::Primary ? PATA_PRIMARY_IRQ : PATA_SECONDARY_IRQ))
RefPtr<StorageDevice> IDEChannel::master_device()
{
return m_master;
}
RefPtr<StorageDevice> IDEChannel::slave_device()
{
return m_slave;
}
IDEChannel::IDEChannel(const IDEController& controller, IOAddressGroup io_group, ChannelType type, bool force_pio)
: IRQHandler(type == ChannelType::Primary ? PATA_PRIMARY_IRQ : PATA_SECONDARY_IRQ)
, m_channel_number((type == ChannelType::Primary ? 0 : 1))
, m_io_base((type == ChannelType::Primary ? 0x1F0 : 0x170))
, m_control_base((type == ChannelType::Primary ? 0x3f6 : 0x376))
, m_bus_master_base(PCI::get_BAR4(pci_address()) & 0xfffc)
, m_io_group(io_group)
, m_parent_controller(controller)
{
disable_irq();
@ -137,15 +139,15 @@ PATAChannel::PATAChannel(PCI::Address address, ChannelType type, bool force_pio)
enable_irq();
}
PATAChannel::~PATAChannel()
IDEChannel::~IDEChannel()
{
}
void PATAChannel::start_request(AsyncBlockDeviceRequest& request, bool use_dma, bool is_slave)
void IDEChannel::start_request(AsyncBlockDeviceRequest& request, bool use_dma, bool is_slave)
{
ScopedSpinLock lock(m_request_lock);
#ifdef PATA_DEBUG
dbg() << "PATAChannel::start_request";
dbg() << "IDEChannel::start_request";
#endif
m_current_request = &request;
m_current_request_block_index = 0;
@ -165,7 +167,7 @@ void PATAChannel::start_request(AsyncBlockDeviceRequest& request, bool use_dma,
}
}
void PATAChannel::complete_current_request(AsyncDeviceRequest::RequestResult result)
void IDEChannel::complete_current_request(AsyncDeviceRequest::RequestResult result)
{
// NOTE: this may be called from the interrupt handler!
ASSERT(m_current_request);
@ -177,7 +179,7 @@ void PATAChannel::complete_current_request(AsyncDeviceRequest::RequestResult res
// before Processor::deferred_call_queue returns!
Processor::deferred_call_queue([this, result]() {
#ifdef PATA_DEBUG
dbg() << "PATAChannel::complete_current_request result: " << result;
dbg() << "IDEChannel::complete_current_request result: " << result;
#endif
ASSERT(m_current_request);
auto& request = *m_current_request;
@ -193,7 +195,7 @@ void PATAChannel::complete_current_request(AsyncDeviceRequest::RequestResult res
}
// I read somewhere that this may trigger a cache flush so let's do it.
m_bus_master_base.offset(2).out<u8>(m_bus_master_base.offset(2).in<u8>() | 0x6);
m_io_group.bus_master_base().offset(2).out<u8>(m_io_group.bus_master_base().offset(2).in<u8>() | 0x6);
}
}
@ -201,50 +203,50 @@ void PATAChannel::complete_current_request(AsyncDeviceRequest::RequestResult res
});
}
void PATAChannel::initialize(bool force_pio)
void IDEChannel::initialize(bool force_pio)
{
PCI::enable_interrupt_line(pci_address());
m_parent_controller->enable_pin_based_interrupts();
if (force_pio) {
klog() << "PATAChannel: Requested to force PIO mode; not setting up DMA";
klog() << "IDEChannel: Requested to force PIO mode; not setting up DMA";
return;
}
// Let's try to set up DMA transfers.
PCI::enable_bus_mastering(pci_address());
PCI::enable_bus_mastering(m_parent_controller->pci_address());
m_prdt_page = MM.allocate_supervisor_physical_page();
prdt().end_of_table = 0x8000;
m_dma_buffer_page = MM.allocate_supervisor_physical_page();
klog() << "PATAChannel: Bus master IDE: " << m_bus_master_base;
klog() << "IDEChannel: Bus master IDE: " << m_io_group.bus_master_base();
}
static void print_ide_status(u8 status)
{
klog() << "PATAChannel: print_ide_status: DRQ=" << ((status & ATA_SR_DRQ) != 0) << " BSY=" << ((status & ATA_SR_BSY) != 0) << " DRDY=" << ((status & ATA_SR_DRDY) != 0) << " DSC=" << ((status & ATA_SR_DSC) != 0) << " DF=" << ((status & ATA_SR_DF) != 0) << " CORR=" << ((status & ATA_SR_CORR) != 0) << " IDX=" << ((status & ATA_SR_IDX) != 0) << " ERR=" << ((status & ATA_SR_ERR) != 0);
klog() << "IDEChannel: print_ide_status: DRQ=" << ((status & ATA_SR_DRQ) != 0) << " BSY=" << ((status & ATA_SR_BSY) != 0) << " DRDY=" << ((status & ATA_SR_DRDY) != 0) << " DSC=" << ((status & ATA_SR_DSC) != 0) << " DF=" << ((status & ATA_SR_DF) != 0) << " CORR=" << ((status & ATA_SR_CORR) != 0) << " IDX=" << ((status & ATA_SR_IDX) != 0) << " ERR=" << ((status & ATA_SR_ERR) != 0);
}
void PATAChannel::handle_irq(const RegisterState&)
void IDEChannel::handle_irq(const RegisterState&)
{
u8 status = m_io_base.offset(ATA_REG_STATUS).in<u8>();
u8 status = m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>();
m_entropy_source.add_random_event(status);
u8 bstatus = m_bus_master_base.offset(2).in<u8>();
u8 bstatus = m_io_group.bus_master_base().offset(2).in<u8>();
if (!(bstatus & 0x4)) {
// interrupt not from this device, ignore
#ifdef PATA_DEBUG
klog() << "PATAChannel: ignore interrupt";
klog() << "IDEChannel: ignore interrupt";
#endif
return;
}
ScopedSpinLock lock(m_request_lock);
#ifdef PATA_DEBUG
klog() << "PATAChannel: interrupt: DRQ=" << ((status & ATA_SR_DRQ) != 0) << " BSY=" << ((status & ATA_SR_BSY) != 0) << " DRDY=" << ((status & ATA_SR_DRDY) != 0);
klog() << "IDEChannel: interrupt: DRQ=" << ((status & ATA_SR_DRQ) != 0) << " BSY=" << ((status & ATA_SR_BSY) != 0) << " DRDY=" << ((status & ATA_SR_DRDY) != 0);
#endif
if (!m_current_request) {
#ifdef PATA_DEBUG
dbg() << "PATAChannel: IRQ but no pending request!";
dbg() << "IDEChannel: IRQ but no pending request!";
#endif
return;
}
@ -253,8 +255,8 @@ void PATAChannel::handle_irq(const RegisterState&)
if (status & ATA_SR_ERR) {
print_ide_status(status);
m_device_error = m_io_base.offset(ATA_REG_ERROR).in<u8>();
klog() << "PATAChannel: Error " << String::format("%b", m_device_error) << "!";
m_device_error = m_io_group.io_base().offset(ATA_REG_ERROR).in<u8>();
klog() << "IDEChannel: Error " << String::format("%b", m_device_error) << "!";
complete_current_request(AsyncDeviceRequest::Failure);
return;
}
@ -270,7 +272,7 @@ void PATAChannel::handle_irq(const RegisterState&)
// trigger page faults
Processor::deferred_call_queue([this]() {
if (m_current_request->request_type() == AsyncBlockDeviceRequest::Read) {
dbg() << "PATAChannel: Read block " << m_current_request_block_index << "/" << m_current_request->block_count();
dbg() << "IDEChannel: Read block " << m_current_request_block_index << "/" << m_current_request->block_count();
if (ata_do_read_sector()) {
if (++m_current_request_block_index >= m_current_request->block_count()) {
complete_current_request(AsyncDeviceRequest::Success);
@ -281,12 +283,12 @@ void PATAChannel::handle_irq(const RegisterState&)
}
} else {
if (!m_current_request_flushing_cache) {
dbg() << "PATAChannel: Wrote block " << m_current_request_block_index << "/" << m_current_request->block_count();
dbg() << "IDEChannel: Wrote block " << m_current_request_block_index << "/" << m_current_request->block_count();
if (++m_current_request_block_index >= m_current_request->block_count()) {
// We read the last block, flush cache
ASSERT(!m_current_request_flushing_cache);
m_current_request_flushing_cache = true;
m_io_base.offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_CACHE_FLUSH);
m_io_group.io_base().offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_CACHE_FLUSH);
} else {
// Read next block
ata_do_write_sector();
@ -305,27 +307,27 @@ static void io_delay()
IO::in8(0x3f6);
}
void PATAChannel::detect_disks()
void IDEChannel::detect_disks()
{
// There are only two possible disks connected to a channel
for (auto i = 0; i < 2; i++) {
m_io_base.offset(ATA_REG_HDDEVSEL).out<u8>(0xA0 | (i << 4)); // First, we need to select the drive itself
m_io_group.io_base().offset(ATA_REG_HDDEVSEL).out<u8>(0xA0 | (i << 4)); // First, we need to select the drive itself
// Apparently these need to be 0 before sending IDENTIFY?!
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(0x00);
m_io_base.offset(ATA_REG_LBA0).out<u8>(0x00);
m_io_base.offset(ATA_REG_LBA1).out<u8>(0x00);
m_io_base.offset(ATA_REG_LBA2).out<u8>(0x00);
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(0x00);
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>(0x00);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>(0x00);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>(0x00);
m_io_base.offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_IDENTIFY); // Send the ATA_IDENTIFY command
m_io_group.io_base().offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_IDENTIFY); // Send the ATA_IDENTIFY command
// Wait for the BSY flag to be reset
while (m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
while (m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
;
if (m_io_base.offset(ATA_REG_STATUS).in<u8>() == 0x00) {
if (m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() == 0x00) {
#ifdef PATA_DEBUG
klog() << "PATAChannel: No " << (i == 0 ? "master" : "slave") << " disk detected!";
klog() << "IDEChannel: No " << (i == 0 ? "master" : "slave") << " disk detected!";
#endif
continue;
}
@ -337,7 +339,7 @@ void PATAChannel::detect_disks()
const u16* wbufbase = (u16*)wbuf.data();
for (u32 i = 0; i < 256; ++i) {
u16 data = m_io_base.offset(ATA_REG_DATA).in<u16>();
u16 data = m_io_group.io_base().offset(ATA_REG_DATA).in<u16>();
*(w++) = data;
*(b++) = MSB(data);
*(b++) = LSB(data);
@ -350,26 +352,25 @@ void PATAChannel::detect_disks()
u8 cyls = wbufbase[1];
u8 heads = wbufbase[3];
u8 spt = wbufbase[6];
klog() << "PATAChannel: Name=" << ((char*)bbuf.data() + 54) << ", C/H/Spt=" << cyls << "/" << heads << "/" << spt;
if (cyls == 0 || heads == 0 || spt == 0)
continue;
klog() << "IDEChannel: Name=" << ((char*)bbuf.data() + 54) << ", C/H/Spt=" << cyls << "/" << heads << "/" << spt;
int major = (m_channel_number == 0) ? 3 : 4;
if (i == 0) {
m_master = PATADiskDevice::create(*this, PATADiskDevice::DriveType::Master, major, 0);
m_master->set_drive_geometry(cyls, heads, spt);
m_master = PATADiskDevice::create(m_parent_controller, *this, PATADiskDevice::DriveType::Master, cyls, heads, spt, major, 0);
} else {
m_slave = PATADiskDevice::create(*this, PATADiskDevice::DriveType::Slave, major, 1);
m_slave->set_drive_geometry(cyls, heads, spt);
m_slave = PATADiskDevice::create(m_parent_controller, *this, PATADiskDevice::DriveType::Slave, cyls, heads, spt, major, 1);
}
}
}
void PATAChannel::ata_read_sectors_with_dma(bool slave_request)
void IDEChannel::ata_read_sectors_with_dma(bool slave_request)
{
auto& request = *m_current_request;
u32 lba = request.block_index();
#ifdef PATA_DEBUG
dbg() << "PATAChannel::ata_read_sectors_with_dma (" << lba << " x" << request.block_count() << ")";
dbg() << "IDEChannel::ata_read_sectors_with_dma (" << lba << " x" << request.block_count() << ")";
#endif
prdt().offset = m_dma_buffer_page->paddr();
@ -378,57 +379,57 @@ void PATAChannel::ata_read_sectors_with_dma(bool slave_request)
ASSERT(prdt().size <= PAGE_SIZE);
// Stop bus master
m_bus_master_base.out<u8>(0);
m_io_group.bus_master_base().out<u8>(0);
// Write the PRDT location
m_bus_master_base.offset(4).out(m_prdt_page->paddr().get());
m_io_group.bus_master_base().offset(4).out(m_prdt_page->paddr().get());
// Turn on "Interrupt" and "Error" flag. The error flag should be cleared by hardware.
m_bus_master_base.offset(2).out<u8>(m_bus_master_base.offset(2).in<u8>() | 0x6);
m_io_group.bus_master_base().offset(2).out<u8>(m_io_group.bus_master_base().offset(2).in<u8>() | 0x6);
// Set transfer direction
m_bus_master_base.out<u8>(0x8);
m_io_group.bus_master_base().out<u8>(0x8);
while (m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
while (m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
;
m_control_base.offset(ATA_CTL_CONTROL).out<u8>(0);
m_io_base.offset(ATA_REG_HDDEVSEL).out<u8>(0x40 | (static_cast<u8>(slave_request) << 4));
m_io_group.control_base().offset(ATA_CTL_CONTROL).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_HDDEVSEL).out<u8>(0x40 | (static_cast<u8>(slave_request) << 4));
io_delay();
m_io_base.offset(ATA_REG_FEATURES).out<u16>(0);
m_io_group.io_base().offset(ATA_REG_FEATURES).out<u16>(0);
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(0);
m_io_base.offset(ATA_REG_LBA0).out<u8>(0);
m_io_base.offset(ATA_REG_LBA1).out<u8>(0);
m_io_base.offset(ATA_REG_LBA2).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>(0);
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(request.block_count());
m_io_base.offset(ATA_REG_LBA0).out<u8>((lba & 0x000000ff) >> 0);
m_io_base.offset(ATA_REG_LBA1).out<u8>((lba & 0x0000ff00) >> 8);
m_io_base.offset(ATA_REG_LBA2).out<u8>((lba & 0x00ff0000) >> 16);
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(request.block_count());
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>((lba & 0x000000ff) >> 0);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>((lba & 0x0000ff00) >> 8);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>((lba & 0x00ff0000) >> 16);
for (;;) {
auto status = m_io_base.offset(ATA_REG_STATUS).in<u8>();
auto status = m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>();
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRDY))
break;
}
m_io_base.offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_READ_DMA_EXT);
m_io_group.io_base().offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_READ_DMA_EXT);
io_delay();
enable_irq();
// Start bus master
m_bus_master_base.out<u8>(0x9);
m_io_group.bus_master_base().out<u8>(0x9);
}
bool PATAChannel::ata_do_read_sector()
bool IDEChannel::ata_do_read_sector()
{
auto& request = *m_current_request;
auto out_buffer = request.buffer().offset(m_current_request_block_index * 512);
ssize_t nwritten = request.write_to_buffer_buffered<512>(out_buffer, 512, [&](u8* buffer, size_t buffer_bytes) {
for (size_t i = 0; i < buffer_bytes; i += sizeof(u16))
*(u16*)&buffer[i] = IO::in16(m_io_base.offset(ATA_REG_DATA).get());
*(u16*)&buffer[i] = IO::in16(m_io_group.io_base().offset(ATA_REG_DATA).get());
return (ssize_t)buffer_bytes;
});
if (nwritten < 0) {
@ -439,58 +440,58 @@ bool PATAChannel::ata_do_read_sector()
return true;
}
void PATAChannel::ata_read_sectors(bool slave_request)
void IDEChannel::ata_read_sectors(bool slave_request)
{
auto& request = *m_current_request;
ASSERT(request.block_count() <= 256);
#ifdef PATA_DEBUG
dbg() << "PATAChannel::ata_read_sectors";
dbg() << "IDEChannel::ata_read_sectors";
#endif
while (m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
while (m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
;
auto lba = request.block_index();
#ifdef PATA_DEBUG
klog() << "PATAChannel: Reading " << request.block_count() << " sector(s) @ LBA " << lba;
klog() << "IDEChannel: Reading " << request.block_count() << " sector(s) @ LBA " << lba;
#endif
u8 devsel = 0xe0;
if (slave_request)
devsel |= 0x10;
m_control_base.offset(ATA_CTL_CONTROL).out<u8>(0);
m_io_base.offset(ATA_REG_HDDEVSEL).out<u8>(devsel | (static_cast<u8>(slave_request) << 4) | 0x40);
m_io_group.control_base().offset(ATA_CTL_CONTROL).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_HDDEVSEL).out<u8>(devsel | (static_cast<u8>(slave_request) << 4) | 0x40);
io_delay();
m_io_base.offset(ATA_REG_FEATURES).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_FEATURES).out<u8>(0);
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(0);
m_io_base.offset(ATA_REG_LBA0).out<u8>(0);
m_io_base.offset(ATA_REG_LBA1).out<u8>(0);
m_io_base.offset(ATA_REG_LBA2).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>(0);
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(request.block_count());
m_io_base.offset(ATA_REG_LBA0).out<u8>((lba & 0x000000ff) >> 0);
m_io_base.offset(ATA_REG_LBA1).out<u8>((lba & 0x0000ff00) >> 8);
m_io_base.offset(ATA_REG_LBA2).out<u8>((lba & 0x00ff0000) >> 16);
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(request.block_count());
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>((lba & 0x000000ff) >> 0);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>((lba & 0x0000ff00) >> 8);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>((lba & 0x00ff0000) >> 16);
for (;;) {
auto status = m_io_base.offset(ATA_REG_STATUS).in<u8>();
auto status = m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>();
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRDY))
break;
}
enable_irq();
m_io_base.offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_READ_PIO);
m_io_group.io_base().offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_READ_PIO);
}
void PATAChannel::ata_write_sectors_with_dma(bool slave_request)
void IDEChannel::ata_write_sectors_with_dma(bool slave_request)
{
auto& request = *m_current_request;
u32 lba = request.block_index();
#ifdef PATA_DEBUG
dbg() << "PATAChannel::ata_write_sectors_with_dma (" << lba << " x" << request.block_count() << ")";
dbg() << "IDEChannel::ata_write_sectors_with_dma (" << lba << " x" << request.block_count() << ")";
#endif
prdt().offset = m_dma_buffer_page->paddr();
@ -504,72 +505,72 @@ void PATAChannel::ata_write_sectors_with_dma(bool slave_request)
ASSERT(prdt().size <= PAGE_SIZE);
// Stop bus master
m_bus_master_base.out<u8>(0);
m_io_group.bus_master_base().out<u8>(0);
// Write the PRDT location
m_bus_master_base.offset(4).out<u32>(m_prdt_page->paddr().get());
m_io_group.bus_master_base().offset(4).out<u32>(m_prdt_page->paddr().get());
// Turn on "Interrupt" and "Error" flag. The error flag should be cleared by hardware.
m_bus_master_base.offset(2).out<u8>(m_bus_master_base.offset(2).in<u8>() | 0x6);
m_io_group.bus_master_base().offset(2).out<u8>(m_io_group.bus_master_base().offset(2).in<u8>() | 0x6);
while (m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
while (m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
;
m_control_base.offset(ATA_CTL_CONTROL).out<u8>(0);
m_io_base.offset(ATA_REG_HDDEVSEL).out<u8>(0x40 | (static_cast<u8>(slave_request) << 4));
m_io_group.control_base().offset(ATA_CTL_CONTROL).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_HDDEVSEL).out<u8>(0x40 | (static_cast<u8>(slave_request) << 4));
io_delay();
m_io_base.offset(ATA_REG_FEATURES).out<u16>(0);
m_io_group.io_base().offset(ATA_REG_FEATURES).out<u16>(0);
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(0);
m_io_base.offset(ATA_REG_LBA0).out<u8>(0);
m_io_base.offset(ATA_REG_LBA1).out<u8>(0);
m_io_base.offset(ATA_REG_LBA2).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>(0);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>(0);
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(request.block_count());
m_io_base.offset(ATA_REG_LBA0).out<u8>((lba & 0x000000ff) >> 0);
m_io_base.offset(ATA_REG_LBA1).out<u8>((lba & 0x0000ff00) >> 8);
m_io_base.offset(ATA_REG_LBA2).out<u8>((lba & 0x00ff0000) >> 16);
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(request.block_count());
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>((lba & 0x000000ff) >> 0);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>((lba & 0x0000ff00) >> 8);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>((lba & 0x00ff0000) >> 16);
for (;;) {
auto status = m_io_base.offset(ATA_REG_STATUS).in<u8>();
auto status = m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>();
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRDY))
break;
}
m_io_base.offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_WRITE_DMA_EXT);
m_io_group.io_base().offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_WRITE_DMA_EXT);
io_delay();
enable_irq();
// Start bus master
m_bus_master_base.out<u8>(0x1);
m_io_group.bus_master_base().out<u8>(0x1);
}
void PATAChannel::ata_do_write_sector()
void IDEChannel::ata_do_write_sector()
{
auto& request = *m_current_request;
io_delay();
while ((m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY) || !(m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_DRQ))
while ((m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY) || !(m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_DRQ))
;
u8 status = m_io_base.offset(ATA_REG_STATUS).in<u8>();
u8 status = m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>();
ASSERT(status & ATA_SR_DRQ);
auto in_buffer = request.buffer().offset(m_current_request_block_index * 512);
#ifdef PATA_DEBUG
dbg() << "PATAChannel: Writing 512 bytes (part " << m_current_request_block_index << ") (status=" << String::format("%b", status) << ")...";
dbg() << "IDEChannel: Writing 512 bytes (part " << m_current_request_block_index << ") (status=" << String::format("%b", status) << ")...";
#endif
ssize_t nread = request.read_from_buffer_buffered<512>(in_buffer, 512, [&](const u8* buffer, size_t buffer_bytes) {
for (size_t i = 0; i < buffer_bytes; i += sizeof(u16))
IO::out16(m_io_base.offset(ATA_REG_DATA).get(), *(const u16*)&buffer[i]);
IO::out16(m_io_group.io_base().offset(ATA_REG_DATA).get(), *(const u16*)&buffer[i]);
return (ssize_t)buffer_bytes;
});
if (nread < 0)
complete_current_request(AsyncDeviceRequest::MemoryFault);
}
void PATAChannel::ata_write_sectors(bool slave_request)
void IDEChannel::ata_write_sectors(bool slave_request)
{
auto& request = *m_current_request;
@ -577,34 +578,34 @@ void PATAChannel::ata_write_sectors(bool slave_request)
u32 start_sector = request.block_index();
u32 count = request.block_count();
#ifdef PATA_DEBUG
klog() << "PATAChannel::ata_write_sectors request (" << count << " sector(s) @ " << start_sector << ")";
klog() << "IDEChannel::ata_write_sectors request (" << count << " sector(s) @ " << start_sector << ")";
#endif
while (m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
while (m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY)
;
#ifdef PATA_DEBUG
klog() << "PATAChannel: Writing " << count << " sector(s) @ LBA " << start_sector;
klog() << "IDEChannel: Writing " << count << " sector(s) @ LBA " << start_sector;
#endif
u8 devsel = 0xe0;
if (slave_request)
devsel |= 0x10;
m_io_base.offset(ATA_REG_SECCOUNT0).out<u8>(count == 256 ? 0 : LSB(count));
m_io_base.offset(ATA_REG_LBA0).out<u8>(start_sector & 0xff);
m_io_base.offset(ATA_REG_LBA1).out<u8>((start_sector >> 8) & 0xff);
m_io_base.offset(ATA_REG_LBA2).out<u8>((start_sector >> 16) & 0xff);
m_io_base.offset(ATA_REG_HDDEVSEL).out<u8>(devsel | ((start_sector >> 24) & 0xf));
m_io_group.io_base().offset(ATA_REG_SECCOUNT0).out<u8>(count == 256 ? 0 : LSB(count));
m_io_group.io_base().offset(ATA_REG_LBA0).out<u8>(start_sector & 0xff);
m_io_group.io_base().offset(ATA_REG_LBA1).out<u8>((start_sector >> 8) & 0xff);
m_io_group.io_base().offset(ATA_REG_LBA2).out<u8>((start_sector >> 16) & 0xff);
m_io_group.io_base().offset(ATA_REG_HDDEVSEL).out<u8>(devsel | ((start_sector >> 24) & 0xf));
IO::out8(0x3F6, 0x08);
while (!(m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_DRDY))
while (!(m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_DRDY))
;
m_io_base.offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_WRITE_PIO);
m_io_group.io_base().offset(ATA_REG_COMMAND).out<u8>(ATA_CMD_WRITE_PIO);
io_delay();
while ((m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY) || !(m_io_base.offset(ATA_REG_STATUS).in<u8>() & ATA_SR_DRQ))
while ((m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_BSY) || !(m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>() & ATA_SR_DRQ))
;
enable_irq();

65
Kernel/Devices/PATAChannel.h → Kernel/Storage/IDEChannel.h
View File

@ -41,11 +41,11 @@
#include <AK/RefPtr.h>
#include <Kernel/Devices/Device.h>
#include <Kernel/IO.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Lock.h>
#include <Kernel/PCI/Access.h>
#include <Kernel/PCI/Device.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/Random.h>
#include <Kernel/Storage/StorageDevice.h>
#include <Kernel/VM/PhysicalPage.h>
#include <Kernel/WaitQueue.h>
@ -59,8 +59,9 @@ struct PhysicalRegionDescriptor {
u16 end_of_table { 0 };
};
class PATADiskDevice;
class PATAChannel final : public PCI::Device {
class IDEController;
class IDEChannel final : public IRQHandler {
friend class IDEController;
friend class PATADiskDevice;
AK_MAKE_ETERNAL
public:
@ -69,13 +70,46 @@ public:
Secondary
};
public:
static OwnPtr<PATAChannel> create(ChannelType type, bool force_pio);
PATAChannel(PCI::Address address, ChannelType type, bool force_pio);
virtual ~PATAChannel() override;
struct IOAddressGroup {
IOAddressGroup(IOAddress io_base, IOAddress control_base, IOAddress bus_master_base)
: m_io_base(io_base)
, m_control_base(control_base)
, m_bus_master_base(bus_master_base)
{
}
RefPtr<PATADiskDevice> master_device() { return m_master; };
RefPtr<PATADiskDevice> slave_device() { return m_slave; };
// Disable default implementations that would use surprising integer promotion.
bool operator==(const IOAddressGroup&) const = delete;
bool operator<=(const IOAddressGroup&) const = delete;
bool operator>=(const IOAddressGroup&) const = delete;
bool operator<(const IOAddressGroup&) const = delete;
bool operator>(const IOAddressGroup&) const = delete;
IOAddress io_base() const { return m_io_base; };
IOAddress control_base() const { return m_control_base; }
IOAddress bus_master_base() const { return m_bus_master_base; }
const IOAddressGroup& operator=(const IOAddressGroup& group)
{
m_io_base = group.io_base();
m_control_base = group.control_base();
m_bus_master_base = group.bus_master_base();
return *this;
}
private:
IOAddress m_io_base;
IOAddress m_control_base;
IOAddress m_bus_master_base;
};
public:
static NonnullOwnPtr<IDEChannel> create(const IDEController&, IOAddressGroup, ChannelType type, bool force_pio);
IDEChannel(const IDEController&, IOAddressGroup, ChannelType type, bool force_pio);
virtual ~IDEChannel() override;
RefPtr<StorageDevice> master_device();
RefPtr<StorageDevice> slave_device();
virtual const char* purpose() const override { return "PATA Channel"; }
@ -98,24 +132,25 @@ private:
// Data members
u8 m_channel_number { 0 }; // Channel number. 0 = master, 1 = slave
IOAddress m_io_base;
IOAddress m_control_base;
volatile u8 m_device_error { 0 };
PhysicalRegionDescriptor& prdt() { return *reinterpret_cast<PhysicalRegionDescriptor*>(m_prdt_page->paddr().offset(0xc0000000).as_ptr()); }
RefPtr<PhysicalPage> m_prdt_page;
RefPtr<PhysicalPage> m_dma_buffer_page;
IOAddress m_bus_master_base;
Lockable<bool> m_dma_enabled;
EntropySource m_entropy_source;
RefPtr<PATADiskDevice> m_master;
RefPtr<PATADiskDevice> m_slave;
RefPtr<StorageDevice> m_master;
RefPtr<StorageDevice> m_slave;
AsyncBlockDeviceRequest* m_current_request { nullptr };
u32 m_current_request_block_index { 0 };
bool m_current_request_uses_dma { false };
bool m_current_request_flushing_cache { false };
SpinLock<u8> m_request_lock;
IOAddressGroup m_io_group;
NonnullRefPtr<IDEController> m_parent_controller;
};
}

103
Kernel/Storage/IDEController.cpp Normal file
View File

@ -0,0 +1,103 @@
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <AK/Types.h>
#include <Kernel/Storage/IDEController.h>
#include <Kernel/Storage/PATADiskDevice.h>
namespace Kernel {
NonnullRefPtr<IDEController> IDEController::initialize(PCI::Address address, bool force_pio)
{
return adopt(*new IDEController(address, force_pio));
}
bool IDEController::reset()
{
TODO();
}
bool IDEController::shutdown()
{
TODO();
}
void IDEController::start_request(const StorageDevice&, AsyncBlockDeviceRequest&)
{
ASSERT_NOT_REACHED();
}
void IDEController::complete_current_request(AsyncDeviceRequest::RequestResult)
{
ASSERT_NOT_REACHED();
}
IDEController::IDEController(PCI::Address address, bool force_pio)
: StorageController(address)
{
initialize(force_pio);
}
IDEController::~IDEController()
{
}
void IDEController::initialize(bool force_pio)
{
auto bus_master_base = IOAddress(PCI::get_BAR4(pci_address()) & (~1));
auto bar0 = PCI::get_BAR0(pci_address());
auto base_io = (bar0 == 0x1 || bar0 == 0) ? IOAddress(0x1F0) : IOAddress(bar0);
auto bar1 = PCI::get_BAR1(pci_address());
auto control_io = (bar1 == 0x1 || bar1 == 0) ? IOAddress(0x3F6) : IOAddress(bar1);
m_channels.append(IDEChannel::create(*this, { base_io, control_io, bus_master_base }, IDEChannel::ChannelType::Primary, force_pio));
auto bar2 = PCI::get_BAR2(pci_address());
base_io = (bar2 == 0x1 || bar2 == 0) ? IOAddress(0x170) : IOAddress(bar2);
auto bar3 = PCI::get_BAR3(pci_address());
control_io = (bar3 == 0x1 || bar3 == 0) ? IOAddress(0x376) : IOAddress(bar3);
m_channels.append(IDEChannel::create(*this, { base_io, control_io, bus_master_base.offset(8) }, IDEChannel::ChannelType::Secondary, force_pio));
}
RefPtr<StorageDevice> IDEController::device(u32 index)
{
switch (index) {
case 0:
return m_channels[0].master_device();
case 1:
return m_channels[0].slave_device();
case 2:
return m_channels[1].master_device();
case 3:
return m_channels[1].slave_device();
}
return nullptr;
}
}

61
Kernel/Storage/IDEController.h Normal file
View File

@ -0,0 +1,61 @@
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <AK/Types.h>
#include <Kernel/Storage/IDEChannel.h>
#include <Kernel/Storage/StorageController.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
class AsyncBlockDeviceRequest;
class IDEController final : public StorageController {
AK_MAKE_ETERNAL
public:
public:
static NonnullRefPtr<IDEController> initialize(PCI::Address address, bool force_pio);
virtual ~IDEController() override;
virtual RefPtr<StorageDevice> device(u32 index) override;
virtual bool reset() override;
virtual bool shutdown() override;
virtual void start_request(const StorageDevice&, AsyncBlockDeviceRequest&) override;
virtual void complete_current_request(AsyncDeviceRequest::RequestResult) override;
private:
IDEController(PCI::Address address, bool force_pio);
void initialize(bool force_pio);
void detect_disks();
NonnullOwnPtrVector<IDEChannel> m_channels;
};
}

78
Kernel/Storage/PATADiskDevice.cpp Normal file
View File

@ -0,0 +1,78 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
//#define PATA_DEVICE_DEBUG
#include <AK/Memory.h>
#include <AK/StringView.h>
#include <Kernel/FileSystem/FileDescription.h>
#include <Kernel/Storage/IDEChannel.h>
#include <Kernel/Storage/IDEController.h>
#include <Kernel/Storage/PATADiskDevice.h>
namespace Kernel {
NonnullRefPtr<PATADiskDevice> PATADiskDevice::create(const IDEController& controller, IDEChannel& channel, DriveType type, u8 cylinders, u8 heads, u8 spt, int major, int minor)
{
return adopt(*new PATADiskDevice(controller, channel, type, cylinders, heads, spt, major, minor));
}
PATADiskDevice::PATADiskDevice(const IDEController& controller, IDEChannel& channel, DriveType type, u8 cylinders, u8 heads, u8 spt, int major, int minor)
: StorageDevice(controller, major, minor, 512, 0)
, m_cylinders(cylinders)
, m_heads(heads)
, m_sectors_per_track(spt)
, m_channel(channel)
, m_drive_type(type)
{
}
PATADiskDevice::~PATADiskDevice()
{
}
const char* PATADiskDevice::class_name() const
{
return "PATADiskDevice";
}
void PATADiskDevice::start_request(AsyncBlockDeviceRequest& request)
{
bool use_dma = !m_channel.m_io_group.bus_master_base().is_null() && m_channel.m_dma_enabled.resource();
m_channel.start_request(request, use_dma, is_slave());
}
size_t PATADiskDevice::max_addressable_block() const
{
return m_cylinders * m_heads * m_sectors_per_track;
}
bool PATADiskDevice::is_slave() const
{
return m_drive_type == DriveType::Slave;
}
}

25
Kernel/Devices/PATADiskDevice.h → Kernel/Storage/PATADiskDevice.h
View File

@ -30,15 +30,16 @@
#pragma once
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Lock.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
class PATAChannel;
class IDEController;
class PATADiskDevice final : public BlockDevice {
class PATADiskDevice final : public StorageDevice {
friend class IDEController;
AK_MAKE_ETERNAL
public:
// Type of drive this IDEDiskDevice is on the ATA channel.
@ -51,22 +52,19 @@ public:
};
public:
static NonnullRefPtr<PATADiskDevice> create(PATAChannel&, DriveType, int major, int minor);
static NonnullRefPtr<PATADiskDevice> create(const IDEController&, IDEChannel&, DriveType, u8, u8, u8, int major, int minor);
virtual ~PATADiskDevice() override;
void set_drive_geometry(u16, u16, u16);
// ^StorageDevice
virtual Type type() const override { return StorageDevice::Type::IDE; }
virtual size_t max_addressable_block() const override;
// ^BlockDevice
virtual void start_request(AsyncBlockDeviceRequest&) override;
virtual KResultOr<size_t> read(FileDescription&, size_t, UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const FileDescription&, size_t) const override;
virtual KResultOr<size_t> write(FileDescription&, size_t, const UserOrKernelBuffer&, size_t) override;
virtual bool can_write(const FileDescription&, size_t) const override;
protected:
explicit PATADiskDevice(PATAChannel&, DriveType, int, int);
private:
PATADiskDevice(const IDEController&, IDEChannel&, DriveType, u8, u8, u8, int major, int minor);
// ^DiskDevice
virtual const char* class_name() const override;
@ -76,9 +74,8 @@ private:
u16 m_cylinders { 0 };
u16 m_heads { 0 };
u16 m_sectors_per_track { 0 };
IDEChannel& m_channel;
DriveType m_drive_type { DriveType::Master };
PATAChannel& m_channel;
};
}

64
Kernel/Storage/StorageController.h Normal file
View File

@ -0,0 +1,64 @@
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <Kernel/Devices/Device.h>
#include <Kernel/IO.h>
#include <Kernel/Lock.h>
#include <Kernel/PCI/Access.h>
#include <Kernel/PCI/DeviceController.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/Random.h>
#include <Kernel/VM/PhysicalPage.h>
#include <Kernel/WaitQueue.h>
namespace Kernel {
class AsyncBlockDeviceRequest;
class StorageDevice;
class StorageController : public RefCounted<StorageController>
, public PCI::DeviceController {
AK_MAKE_ETERNAL
public:
protected:
explicit StorageController(PCI::Address address)
: PCI::DeviceController(address)
{
}
virtual RefPtr<StorageDevice> device(u32 index) = 0;
virtual void start_request(const StorageDevice&, AsyncBlockDeviceRequest&) = 0;
protected:
virtual bool reset() = 0;
virtual bool shutdown() = 0;
virtual void complete_current_request(AsyncDeviceRequest::RequestResult) = 0;
};
}

65
Kernel/Devices/PATADiskDevice.cpp → Kernel/Storage/StorageDevice.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -24,51 +24,33 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
//#define PATA_DEVICE_DEBUG
//#define STORAGE_DEVICE_DEBUG
#include <AK/Memory.h>
#include <AK/StringView.h>
#include <Kernel/Devices/PATAChannel.h>
#include <Kernel/Devices/PATADiskDevice.h>
#include <Kernel/FileSystem/FileDescription.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
NonnullRefPtr<PATADiskDevice> PATADiskDevice::create(PATAChannel& channel, DriveType type, int major, int minor)
{
return adopt(*new PATADiskDevice(channel, type, major, minor));
}
PATADiskDevice::PATADiskDevice(PATAChannel& channel, DriveType type, int major, int minor)
: BlockDevice(major, minor, 512)
, m_drive_type(type)
, m_channel(channel)
StorageDevice::StorageDevice(const StorageController& controller, int major, int minor, size_t sector_size, size_t max_addressable_block)
: BlockDevice(major, minor, sector_size)
, m_storage_controller(controller)
, m_max_addressable_block(max_addressable_block)
{
}
PATADiskDevice::~PATADiskDevice()
const char* StorageDevice::class_name() const
{
return "StorageDevice";
}
const char* PATADiskDevice::class_name() const
NonnullRefPtr<StorageController> StorageDevice::controller() const
{
return "PATADiskDevice";
return m_storage_controller;
}
void PATADiskDevice::start_request(AsyncBlockDeviceRequest& request)
{
bool use_dma = !m_channel.m_bus_master_base.is_null() && m_channel.m_dma_enabled.resource();
m_channel.start_request(request, use_dma, is_slave());
}
void PATADiskDevice::set_drive_geometry(u16 cyls, u16 heads, u16 spt)
{
m_cylinders = cyls;
m_heads = heads;
m_sectors_per_track = spt;
}
KResultOr<size_t> PATADiskDevice::read(FileDescription&, size_t offset, UserOrKernelBuffer& outbuf, size_t len)
KResultOr<size_t> StorageDevice::read(FileDescription&, size_t offset, UserOrKernelBuffer& outbuf, size_t len)
{
unsigned index = offset / block_size();
u16 whole_blocks = len / block_size();
@ -83,8 +65,8 @@ KResultOr<size_t> PATADiskDevice::read(FileDescription&, size_t offset, UserOrKe
remaining = 0;
}
#ifdef PATA_DEVICE_DEBUG
klog() << "PATADiskDevice::read() index=" << index << " whole_blocks=" << whole_blocks << " remaining=" << remaining;
#ifdef STORAGE_DEVICE_DEBUG
klog() << "StorageDevice::read() index=" << index << " whole_blocks=" << whole_blocks << " remaining=" << remaining;
#endif
if (whole_blocks > 0) {
@ -130,12 +112,12 @@ KResultOr<size_t> PATADiskDevice::read(FileDescription&, size_t offset, UserOrKe
return pos + remaining;
}
bool PATADiskDevice::can_read(const FileDescription&, size_t offset) const
bool StorageDevice::can_read(const FileDescription&, size_t offset) const
{
return offset < (m_cylinders * m_heads * m_sectors_per_track * block_size());
return offset < (max_addressable_block() * block_size());
}
KResultOr<size_t> PATADiskDevice::write(FileDescription&, size_t offset, const UserOrKernelBuffer& inbuf, size_t len)
KResultOr<size_t> StorageDevice::write(FileDescription&, size_t offset, const UserOrKernelBuffer& inbuf, size_t len)
{
unsigned index = offset / block_size();
u16 whole_blocks = len / block_size();
@ -150,8 +132,8 @@ KResultOr<size_t> PATADiskDevice::write(FileDescription&, size_t offset, const U
remaining = 0;
}
#ifdef PATA_DEVICE_DEBUG
klog() << "PATADiskDevice::write() index=" << index << " whole_blocks=" << whole_blocks << " remaining=" << remaining;
#ifdef STORAGE_DEVICE_DEBUG
klog() << "StorageDevice::write() index=" << index << " whole_blocks=" << whole_blocks << " remaining=" << remaining;
#endif
if (whole_blocks > 0) {
@ -222,14 +204,9 @@ KResultOr<size_t> PATADiskDevice::write(FileDescription&, size_t offset, const U
return pos + remaining;
}
bool PATADiskDevice::can_write(const FileDescription&, size_t offset) const
bool StorageDevice::can_write(const FileDescription&, size_t offset) const
{
return offset < (m_cylinders * m_heads * m_sectors_per_track * block_size());
}
bool PATADiskDevice::is_slave() const
{
return m_drive_type == DriveType::Slave;
return offset < (max_addressable_block() * block_size());
}
}

66
Kernel/Storage/StorageDevice.h Normal file
View File

@ -0,0 +1,66 @@
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Lock.h>
#include <Kernel/Storage/StorageController.h>
namespace Kernel {
class StorageDevice : public BlockDevice {
AK_MAKE_ETERNAL
public:
enum class Type : u8 {
IDE,
NVMe,
};
public:
virtual Type type() const = 0;
virtual size_t max_addressable_block() const { return m_max_addressable_block; }
NonnullRefPtr<StorageController> controller() const;
// ^BlockDevice
virtual KResultOr<size_t> read(FileDescription&, size_t, UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const FileDescription&, size_t) const override;
virtual KResultOr<size_t> write(FileDescription&, size_t, const UserOrKernelBuffer&, size_t) override;
virtual bool can_write(const FileDescription&, size_t) const override;
protected:
StorageDevice(const StorageController&, int, int, size_t, size_t);
// ^DiskDevice
virtual const char* class_name() const override;
private:
NonnullRefPtr<StorageController> m_storage_controller;
size_t m_max_addressable_block;
};
}

15
Kernel/init.cpp
View File

@ -40,8 +40,6 @@
#include <Kernel/Devices/MBRPartitionTable.h>
#include <Kernel/Devices/MBVGADevice.h>
#include <Kernel/Devices/NullDevice.h>
#include <Kernel/Devices/PATAChannel.h>
#include <Kernel/Devices/PATADiskDevice.h>
#include <Kernel/Devices/RandomDevice.h>
#include <Kernel/Devices/SB16.h>
#include <Kernel/Devices/SerialDevice.h>
@ -67,6 +65,8 @@
#include <Kernel/RTC.h>
#include <Kernel/Random.h>
#include <Kernel/Scheduler.h>
#include <Kernel/Storage/IDEController.h>
#include <Kernel/Storage/PATADiskDevice.h>
#include <Kernel/TTY/PTYMultiplexer.h>
#include <Kernel/TTY/VirtualConsole.h>
#include <Kernel/Tasks/FinalizerTask.h>
@ -276,8 +276,15 @@ void init_stage2(void*)
Processor::halt();
}
auto pata0 = PATAChannel::create(PATAChannel::ChannelType::Primary, force_pio);
NonnullRefPtr<BlockDevice> root_dev = *pata0->master_device();
RefPtr<BlockDevice> checked_root_dev;
PCI::enumerate([&](const PCI::Address& address, PCI::ID) {
if (PCI::get_class(address) == 0x1 && PCI::get_subclass(address) == 0x1) {
auto pata0 = IDEController::initialize(address, force_pio);
checked_root_dev = *pata0->device(0);
}
});
ASSERT(!checked_root_dev.is_null());
NonnullRefPtr<BlockDevice> root_dev = checked_root_dev.release_nonnull();
root = root.substring(strlen("/dev/hda"), root.length() - strlen("/dev/hda"));