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Kernel/Storage: Merge IDE functionality from BusMasterChannel to Channel

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This simplifies the flow of how things work currently and is a step for
more improvements in the next commits.
This commit is contained in:
Liav A 2021-11-20 17:23:09 +02:00 • committed by Linus Groh
parent ade672c576
commit 2c987367e6
11 changed files with 294 additions and 358 deletions
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51
Kernel/Storage/ATA/GenericIDE/Channel.h
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@ -17,6 +17,7 @@
#pragma once
#include <AK/Badge.h>
#include <AK/RefPtr.h>
#include <Kernel/Arch/x86/IO.h>
#include <Kernel/Devices/Device.h>
@ -26,6 +27,7 @@
#include <Kernel/PhysicalAddress.h>
#include <Kernel/Random.h>
#include <Kernel/Storage/ATA/ATADevice.h>
#include <Kernel/Storage/ATA/GenericIDE/Controller.h>
#include <Kernel/Storage/StorageDevice.h>
#include <Kernel/WaitQueue.h>
@ -33,7 +35,8 @@ namespace Kernel {
class AsyncBlockDeviceRequest;
class IDEController;
class PCIIDEController;
class ISAIDEController;
class IDEChannel : public RefCounted<IDEChannel>
, public IRQHandler {
friend class IDEController;
@ -57,6 +60,13 @@ public:
{
}
IOAddressGroup(IOAddress io_base, IOAddress control_base, Optional<IOAddress> bus_master_base)
: m_io_base(io_base)
, m_control_base(control_base)
, m_bus_master_base(bus_master_base)
{
}
IOAddressGroup(IOAddress io_base, IOAddress control_base)
: m_io_base(io_base)
, m_control_base(control_base)
@ -93,6 +103,9 @@ public:
public:
static NonnullRefPtr<IDEChannel> create(IDEController const&, IOAddressGroup, ChannelType type);
static NonnullRefPtr<IDEChannel> create(IDEController const&, u8 irq, IOAddressGroup, ChannelType type);
void initialize_with_pci_controller(Badge<PCIIDEController>, bool force_pio);
void initialize_with_isa_controller(Badge<ISAIDEController>, bool force_pio);
virtual ~IDEChannel() override;
RefPtr<StorageDevice> master_device() const;
@ -100,14 +113,15 @@ public:
virtual StringView purpose() const override { return "PATA Channel"sv; }
virtual bool is_dma_enabled() const { return false; }
private:
void complete_current_request(AsyncDeviceRequest::RequestResult);
void initialize();
static constexpr size_t m_logical_sector_size = 512;
void initialize(bool force_pio);
struct [[gnu::packed]] PhysicalRegionDescriptor {
u32 offset;
u16 size { 0 };
u16 end_of_table { 0 };
};
protected:
enum class LBAMode : u8 {
None, // CHS
TwentyEightBit,
@ -123,11 +137,18 @@ protected:
IDEChannel(IDEController const&, u8 irq, IOAddressGroup, ChannelType type);
//^ IRQHandler
virtual bool handle_irq(RegisterState const&) override;
bool handle_irq_for_dma_transaction();
void complete_dma_transaction(AsyncDeviceRequest::RequestResult);
bool handle_irq_for_pio_transaction();
void complete_pio_transaction(AsyncDeviceRequest::RequestResult);
virtual void send_ata_io_command(LBAMode lba_mode, Direction direction) const;
void send_ata_pio_command(LBAMode lba_mode, Direction direction) const;
void ata_read_sectors_with_pio(bool, u16);
void ata_write_sectors_with_pio(bool, u16);
virtual void ata_read_sectors(bool, u16);
virtual void ata_write_sectors(bool, u16);
void send_ata_dma_command(LBAMode lba_mode, Direction direction) const;
void ata_read_sectors_with_dma(bool, u16);
void ata_write_sectors_with_dma(bool, u16);
void detect_disks();
StringView channel_type_string() const;
@ -142,8 +163,10 @@ protected:
void ata_access(Direction, bool, u64, u8, u16);
bool ata_do_read_sector();
void ata_do_write_sector();
bool ata_do_pio_read_sector();
void ata_do_pio_write_sector();
PhysicalRegionDescriptor& prdt() { return *reinterpret_cast<PhysicalRegionDescriptor*>(m_prdt_region->vaddr().as_ptr()); }
// Data members
ChannelType m_channel_type { ChannelType::Primary };
@ -160,7 +183,13 @@ protected:
Spinlock m_request_lock;
Mutex m_lock { "IDEChannel"sv };
bool m_dma_enabled { false };
IOAddressGroup m_io_group;
OwnPtr<Memory::Region> m_prdt_region;
OwnPtr<Memory::Region> m_dma_buffer_region;
RefPtr<Memory::PhysicalPage> m_prdt_page;
RefPtr<Memory::PhysicalPage> m_dma_buffer_page;
NonnullRefPtr<IDEController> m_parent_controller;
};
}