mirror of
https://github.com/akuker/RASCSI.git
synced 2024-12-22 15:30:09 +00:00
c98c52ffb8
* Cleaned up dependencies on controller manager * Removed global fields * Simplified setting up RascsiResponse and RascsiExecutor * Got rid of remaining raw pointers * Use references instead of pointers * Improved encapsulation
134 lines
4.3 KiB
C++
134 lines
4.3 KiB
C++
//---------------------------------------------------------------------------
|
|
//
|
|
// SCSI Target Emulator RaSCSI Reloaded
|
|
// for Raspberry Pi
|
|
//
|
|
// Copyright (C) 2022 Uwe Seimet
|
|
//
|
|
// Base class for device controllers
|
|
//
|
|
//---------------------------------------------------------------------------
|
|
|
|
#pragma once
|
|
|
|
#include "scsi.h"
|
|
#include "hal/bus.h"
|
|
#include "phase_handler.h"
|
|
#include "controller_manager.h"
|
|
#include <unordered_set>
|
|
#include <unordered_map>
|
|
#include <vector>
|
|
#include <memory>
|
|
|
|
using namespace std;
|
|
|
|
class PrimaryDevice;
|
|
|
|
class AbstractController : public PhaseHandler, public enable_shared_from_this<AbstractController>
|
|
{
|
|
public:
|
|
|
|
enum class rascsi_shutdown_mode {
|
|
NONE,
|
|
STOP_RASCSI,
|
|
STOP_PI,
|
|
RESTART_PI
|
|
};
|
|
|
|
AbstractController(shared_ptr<ControllerManager> controller_manager, int target_id, int max_luns)
|
|
: controller_manager(controller_manager), target_id(target_id), max_luns(max_luns) {}
|
|
~AbstractController() override = default;
|
|
|
|
virtual void Error(scsi_defs::sense_key, scsi_defs::asc = scsi_defs::asc::NO_ADDITIONAL_SENSE_INFORMATION,
|
|
scsi_defs::status = scsi_defs::status::CHECK_CONDITION) = 0;
|
|
virtual void Reset();
|
|
virtual int GetInitiatorId() const = 0;
|
|
|
|
// Get requested LUN based on IDENTIFY message, with LUN from the CDB as fallback
|
|
virtual int GetEffectiveLun() const = 0;
|
|
|
|
virtual void ScheduleShutdown(rascsi_shutdown_mode) = 0;
|
|
|
|
int GetTargetId() const { return target_id; }
|
|
int GetMaxLuns() const { return max_luns; }
|
|
int GetLunCount() const { return static_cast<int>(luns.size()); }
|
|
|
|
unordered_set<shared_ptr<PrimaryDevice>> GetDevices() const;
|
|
shared_ptr<PrimaryDevice> GetDeviceForLun(int) const;
|
|
bool AddDevice(shared_ptr<PrimaryDevice>);
|
|
bool RemoveDevice(shared_ptr<PrimaryDevice>);
|
|
bool HasDeviceForLun(int) const;
|
|
int ExtractInitiatorId(int) const;
|
|
|
|
// TODO These should probably be extracted into a new TransferHandler class
|
|
void AllocateBuffer(size_t);
|
|
vector<uint8_t>& GetBuffer() { return ctrl.buffer; }
|
|
scsi_defs::status GetStatus() const { return ctrl.status; }
|
|
void SetStatus(scsi_defs::status s) { ctrl.status = s; }
|
|
uint32_t GetLength() const { return ctrl.length; }
|
|
void SetLength(uint32_t l) { ctrl.length = l; }
|
|
uint32_t GetBlocks() const { return ctrl.blocks; }
|
|
void SetBlocks(uint32_t b) { ctrl.blocks = b; }
|
|
void DecrementBlocks() { --ctrl.blocks; }
|
|
uint64_t GetNext() const { return ctrl.next; }
|
|
void SetNext(uint64_t n) { ctrl.next = n; }
|
|
void IncrementNext() { ++ctrl.next; }
|
|
int GetMessage() const { return ctrl.message; }
|
|
void SetMessage(int m) { ctrl.message = m; }
|
|
vector<int>& GetCmd() { return ctrl.cmd; }
|
|
int GetCmd(int index) const { return ctrl.cmd[index]; }
|
|
bool IsByteTransfer() const { return is_byte_transfer; }
|
|
void SetByteTransfer(bool);
|
|
uint32_t GetBytesToTransfer() const { return bytes_to_transfer; }
|
|
void SetBytesToTransfer(uint32_t b) { bytes_to_transfer = b; }
|
|
|
|
protected:
|
|
|
|
shared_ptr<ControllerManager> GetControllerManager() const { return controller_manager.lock(); }
|
|
inline BUS& GetBus() const { return controller_manager.lock()->GetBus(); }
|
|
|
|
scsi_defs::scsi_command GetOpcode() const { return static_cast<scsi_defs::scsi_command>(ctrl.cmd[0]); }
|
|
int GetLun() const { return (ctrl.cmd[1] >> 5) & 0x07; }
|
|
|
|
void ProcessPhase();
|
|
|
|
void AllocateCmd(size_t);
|
|
|
|
// TODO These should probably be extracted into a new TransferHandler class
|
|
bool HasValidLength() const { return ctrl.length != 0; }
|
|
int GetOffset() const { return ctrl.offset; }
|
|
void ResetOffset() { ctrl.offset = 0; }
|
|
void UpdateOffsetAndLength() { ctrl.offset += ctrl.length; ctrl.length = 0; }
|
|
|
|
private:
|
|
|
|
using ctrl_t = struct _ctrl_t {
|
|
// Command data, dynamically resized if required
|
|
vector<int> cmd = vector<int>(16);
|
|
|
|
scsi_defs::status status; // Status data
|
|
int message; // Message data
|
|
|
|
// Transfer
|
|
vector<uint8_t> buffer; // Transfer data buffer
|
|
uint32_t blocks; // Number of transfer blocks
|
|
uint64_t next; // Next record
|
|
uint32_t offset; // Transfer offset
|
|
uint32_t length; // Transfer remaining length
|
|
};
|
|
|
|
ctrl_t ctrl = {};
|
|
|
|
weak_ptr<ControllerManager> controller_manager;
|
|
|
|
// Logical units of this controller mapped to their LUN numbers
|
|
unordered_map<int, shared_ptr<PrimaryDevice>> luns;
|
|
|
|
int target_id;
|
|
|
|
int max_luns;
|
|
|
|
bool is_byte_transfer = false;
|
|
uint32_t bytes_to_transfer = 0;
|
|
};
|