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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#ifndef INC_DRIVE_MANAGER_H
#define INC_DRIVE_MANAGER_H
#include <KernelKit/UserProcessScheduler.h>
#include <CompilerKit/CompilerKit.h>
#include <KernelKit/DebugOutput.h>
#include <KernelKit/DeviceMgr.h>
#include <KernelKit/KPC.h>
#include <NewKit/Defines.h>
#include <NewKit/KString.h>
#include <NewKit/Ref.h>
#define kDriveMaxCount (4U)
#define kDriveSectorSz (512U)
#define kDriveInvalidID (-1)
#define kDriveNameLen (32)
#define drv_sector_cnt(SIZE, SECTOR_SZ) (((SIZE) + (SECTOR_SZ)) / (SECTOR_SZ))
namespace Kernel
{
enum
{
kInvalidDrive = -1,
/// Storage types, combine with flags.
kBlockDevice = 0xAD,
kMassStorageDrive = 0xDA,
kFloppyDrive = 0xCD,
kOpticalDrive = 0xDC, // CD-ROM/DVD-ROM/Blu-Ray
kTapeDrive = 0xD7,
/// Storage flags, combine with types.
kReadOnlyDrive = 0x10, // Read only drive
kEPMDrive = 0x11, // Explicit Partition Map.
kEPTDrive = 0x12, // ESP w/ EPM partition.
kMBRDrive = 0x13, // PC classic partition scheme
kGPTDrive = 0x14, // PC new partition scheme
kUnformattedDrive = 0x15,
kStorageCount = 9,
};
/// @brief Media drive trait type.
struct DriveTrait final
{
Char fName[kDriveNameLen]; // /System, /boot, //./Devices/USB...
Int32 fKind; // fMassStorage, fFloppy, fOpticalDrive.
Int32 fFlags; // fReadOnly, fEPMDrive...
/// @brief Packet drive (StorageKit compilant.)
struct DrivePacket final
{
VoidPtr fPacketContent{nullptr}; //! packet body.
Char fPacketMime[kDriveNameLen] = "*/*"; //! identify what we're sending.
SizeT fPacketSize{0UL}; //! packet size
UInt32 fPacketCRC32{0UL}; //! sanity crc, in case if good is set to false
Boolean fPacketGood{YES};
Lba fPacketLba{0UL};
Boolean fPacketReadOnly{NO};
} fPacket;
Lba fLbaStart{0}, fLbaEnd{0};
SizeT fSectorSz{512};
Void (*fInput)(DrivePacket packet);
Void (*fOutput)(DrivePacket packet);
Void (*fVerify)(DrivePacket packet);
Void (*fInit)(DrivePacket packet);
const Char* (*fDriveKind)(Void);
};
///! drive as a device.
typedef DriveTrait* DriveTraitPtr;
/**
* @brief Mounted drives interface.
* @note This class has all of it's drive set to nullptr, allocate them using
* GetAddressOf(index).
*/
class MountpointInterface final
{
public:
explicit MountpointInterface() = default;
~MountpointInterface() = default;
NE_COPY_DEFAULT(MountpointInterface);
public:
DriveTrait& A()
{
return mA;
}
DriveTrait& B()
{
return mB;
}
DriveTrait& C()
{
return mC;
}
DriveTrait& D()
{
return mD;
}
enum
{
kDriveIndexA = 0,
kDriveIndexB,
kDriveIndexC,
kDriveIndexD,
kDriveIndexInvalid,
};
DriveTraitPtr GetAddressOf(const Int32& index)
{
err_local_get() = kErrorSuccess;
switch (index)
{
case kDriveIndexA:
return &mA;
case kDriveIndexB:
return &mB;
case kDriveIndexC:
return &mC;
case kDriveIndexD:
return &mD;
default: {
err_local_get() = kErrorNoSuchDisk;
kout << "No such disc letter.\n";
break;
}
}
return nullptr;
}
private:
DriveTrait mA, mB, mC, mD;
};
/// @brief Unimplemented drive.
/// @param pckt the packet to read.
/// @return
Void io_drv_unimplemented(DriveTrait::DrivePacket* pckt) noexcept;
/// @brief Gets the drive kind (ATA, SCSI, AHCI...)
/// @param void none.
/// @return the drive kind (ATA, Flash, NVM)
const Char* io_drv_kind(Void);
/// @brief Makes a new drive.
/// @return the new drive as a trait.
DriveTrait io_construct_blank_drive(Void) noexcept;
/// @brief Fetches the main drive.
/// @return the new drive as a trait.
DriveTrait io_construct_main_drive(Void) noexcept;
namespace Detect
{
Void io_detect_drive(DriveTrait& trait);
}
/// @brief Read from newfs disk.
/// @param Mnt mounted interface.
/// @param DrvTrait drive info
/// @param DrvIndex drive index.
/// @return
Int32 fs_ifs_read(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex);
/// @brief Write to ifs disk.
/// @param Mnt mounted interface.
/// @param DrvTrait drive info
/// @param DrvIndex drive index.
/// @return
Int32 fs_ifs_write(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex);
} // namespace Kernel
#endif /* ifndef INC_DRIVE_MANAGER_H */
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