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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <KernelKit/DebugOutput.h>
#include <KernelKit/DriveMgr.h>
#include <NewKit/Utils.h>
#include <FirmwareKit/EPM.h>
#include <Mod/ATA/ATA.h>
#include <Mod/AHCI/AHCI.h>
#include <Mod/NVME/NVME.h>
/***********************************************************************************/
/// @file DriveMgr.cc
/// @brief Drive Manager of neoskrnl.
/***********************************************************************************/
namespace Kernel
{
#if defined(__ATA_PIO__) || defined(__ATA_DMA__)
STATIC UInt16 kATAIO = 0U;
STATIC UInt8 kATAMaster = 0U;
#endif
/// @brief reads from an ATA drive.
/// @param pckt Packet structure (fPacketContent must be non null)
/// @return
Void io_drv_input(DriveTrait::DrivePacket pckt)
{
#ifdef __AHCI__
drv_std_read(pckt.fPacketLba, (Char*)pckt.fPacketContent, kAHCISectorSize, pckt.fPacketSize);
#elif defined(__ATA_PIO__) || defined(__ATA_DMA__)
drv_std_read(pckt.fPacketLba, kATAIO, kATAMaster, (Char*)pckt.fPacketContent, kATASectorSize, pckt.fPacketSize);
#endif
}
/// @brief Writes to an ATA drive.
/// @param pckt the packet to write.
/// @return
Void io_drv_output(DriveTrait::DrivePacket pckt)
{
if (pckt.fPacketReadOnly)
return;
#ifdef __AHCI__
drv_std_write(pckt.fPacketLba, (Char*)pckt.fPacketContent, kAHCISectorSize, pckt.fPacketSize);
#elif defined(__ATA_PIO__) || defined(__ATA_DMA__)
drv_std_write(pckt.fPacketLba, kATAIO, kATAMaster, (Char*)pckt.fPacketContent, kATASectorSize, pckt.fPacketSize);
#endif
}
/// @brief Executes a disk check on the ATA drive.
/// @param pckt the packet to read.
/// @return
Void io_drv_init(DriveTrait::DrivePacket pckt)
{
#if defined(__ATA_PIO__) || defined(__ATA_DMA__)
kATAMaster = 0;
kATAIO = 0;
#endif
#if defined(__ATA_PIO__) || defined(__ATA_DMA__)
kATAMaster = true;
kATAIO = ATA_PRIMARY_IO;
if (drv_std_init(kATAIO, kATAMaster, kATAIO, kATAMaster))
{
pckt.fPacketGood = YES;
return;
}
kATAMaster = false;
kATAIO = ATA_SECONDARY_IO;
if (!drv_std_init(kATAIO, kATAMaster, kATAIO, kATAMaster))
{
return;
}
pckt.fPacketGood = YES;
#elif defined(__AHCI__)
UInt16 pi = 0;
if (!drv_std_init(pi))
{
return;
}
#endif // if defined(__ATA_PIO__) || defined (__ATA_DMA__)
}
/// @brief Gets the drive kind (ATA, SCSI, AHCI...)
/// @param no arguments.
/// @return no arguments.
#ifdef __ATA_PIO__
const Char* io_drv_kind(Void)
{
return "ATA-PIO";
}
#endif
#ifdef __ATA_DMA__
const Char* io_drv_kind(Void)
{
return "ATA-DMA";
}
#endif
#ifdef __AHCI__
const Char* io_drv_kind(Void)
{
return "AHCI";
}
#endif
#ifdef __NE_MINIMAL_OS__
const Char* io_drv_kind(Void)
{
return "Not Loaded";
}
#endif
/// @brief Unimplemented drive function.
/// @param pckt the packet to read.
Void io_drv_unimplemented(DriveTrait::DrivePacket pckt) noexcept
{
NE_UNUSED(pckt);
}
/// @brief Makes a new drive.
/// @return the new blank drive.
DriveTrait io_construct_blank_drive() noexcept
{
DriveTrait trait;
constexpr auto kBlankDrive = "/media/blank/";
rt_copy_memory((VoidPtr)kBlankDrive, trait.fName, rt_string_len(kBlankDrive));
trait.fKind = kInvalidDisc;
trait.fInput = io_drv_unimplemented;
trait.fOutput = io_drv_unimplemented;
trait.fVerify = io_drv_unimplemented;
trait.fInit = io_drv_unimplemented;
trait.fDriveKind = io_drv_kind;
kout << "Construct: " << trait.fName << "\r";
return trait;
}
namespace Detect
{
Void io_detect_drive(DriveTrait& trait)
{
EPM_PART_BLOCK block_struct;
trait.fPacket.fPacketLba = kEPMBootBlockLba;
trait.fPacket.fPacketSize = sizeof(EPM_PART_BLOCK);
trait.fPacket.fPacketContent = &block_struct;
rt_copy_memory((VoidPtr) "fs/detect-packet", trait.fPacket.fPacketMime,
rt_string_len("fs/detect-packet"));
trait.fInit(trait.fPacket);
kout << "Reading EPM block...\r";
trait.fInput(trait.fPacket);
if (rt_string_cmp(((BOOT_BLOCK_STRUCT*)trait.fPacket.fPacketContent)->Magic, kEPMMagic, kEPMMagicLength) == 0)
{
trait.fPacket.fPacketReadOnly = NO;
trait.fKind = kMassStorageDisc | kEPMDrive;
kout << "Disk is EPM.\r";
trait.fSectorSz = block_struct.SectorSz;
trait.fLbaEnd = block_struct.LbaEnd;
trait.fLbaStart = block_struct.LbaStart;
if (trait.fSectorSz == 0 ||
trait.fLbaEnd == 0 ||
trait.fSectorSz == 0)
{
ke_panic(RUNTIME_CHECK_FAILED, "Invalid EPM partition!");
}
}
else
{
trait.fPacket.fPacketReadOnly = YES;
trait.fKind = kMassStorageDisc | kUnformattedDrive | kReadOnlyDrive;
kout << "Scheme Found: " << block_struct.Name << endl;
if (block_struct.Name[0] == 0 ||
block_struct.Name[0] == 0xFF ||
block_struct.Name[0] == 0xAF)
kout << "Disk partition is empty (Read Only)\r";
}
rt_copy_memory((VoidPtr) "*/*", trait.fPacket.fPacketMime,
rt_string_len("*/*"));
trait.fPacket.fPacketLba = 0;
trait.fPacket.fPacketSize = 0UL;
trait.fPacket.fPacketContent = nullptr;
}
} // namespace Detect
/// @brief Fetches the main drive.
/// @return the new drive. (returns kEPMDrive if EPM formatted)
DriveTrait io_construct_main_drive() noexcept
{
DriveTrait trait;
constexpr auto kMainDrive = "/media/sda/";
rt_copy_memory((VoidPtr)kMainDrive, trait.fName, rt_string_len(kMainDrive));
MUST_PASS(trait.fName[0] != 0);
trait.fVerify = io_drv_unimplemented;
trait.fOutput = io_drv_output;
trait.fInput = io_drv_input;
trait.fInit = io_drv_init;
trait.fDriveKind = io_drv_kind;
kout << "Detecting partition scheme of: " << trait.fName << ".\r";
Detect::io_detect_drive(trait);
return trait;
}
} // namespace Kernel
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