mirror of
https://github.com/akuker/RASCSI.git
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102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator RaSCSI Reloaded
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// for Raspberry Pi
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//
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// Copyright (C) 2022 Uwe Seimet
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//
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// Base class for device controllers
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//
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//---------------------------------------------------------------------------
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#pragma once
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#include "phase_handler.h"
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#include <unordered_map>
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using namespace std;
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class PrimaryDevice;
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class AbstractController : public PhaseHandler
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{
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public:
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// Maximum number of logical units
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static const int LUN_MAX = 32;
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enum class rascsi_shutdown_mode {
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NONE,
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STOP_RASCSI,
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STOP_PI,
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RESTART_PI
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};
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// Internal data definition
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// TODO Some of these data are probably device specific, and in this case they should be moved.
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// These data are not internal, otherwise they could all be private
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using ctrl_t = struct _ctrl_t {
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// General
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BUS::phase_t phase = BUS::busfree; // Transition phase
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// commands
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DWORD cmd[16]; // Command data
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DWORD status; // Status data
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int message; // Message data
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// Transfer
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// TODO Try to get rid of the static buffer
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BYTE *buffer; // Transfer data buffer
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int bufsize; // Transfer data buffer size
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uint32_t blocks; // Number of transfer blocks
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uint64_t next; // Next record
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uint32_t offset; // Transfer offset
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uint32_t length; // Transfer remaining length
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// Logical units of this device controller mapped to their LUN numbers
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unordered_map<int, PrimaryDevice *> luns;
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};
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AbstractController(BUS *bus, int target_id) : bus(bus), target_id(target_id) {}
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~AbstractController() override = default;
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AbstractController(AbstractController&) = delete;
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AbstractController& operator=(const AbstractController&) = delete;
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virtual BUS::phase_t Process(int) = 0;
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virtual void Error(scsi_defs::sense_key, scsi_defs::asc = scsi_defs::asc::NO_ADDITIONAL_SENSE_INFORMATION,
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scsi_defs::status = scsi_defs::status::CHECK_CONDITION) = 0;
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virtual void Reset() = 0;
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virtual int GetInitiatorId() const = 0;
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virtual void SetByteTransfer(bool) = 0;
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// Get requested LUN based on IDENTIFY message, with LUN from the CDB as fallback
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virtual int GetEffectiveLun() const = 0;
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virtual int GetMaxLuns() const = 0;
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virtual void ScheduleShutdown(rascsi_shutdown_mode) = 0;
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int GetTargetId() const { return target_id; }
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PrimaryDevice *GetDeviceForLun(int) const;
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bool AddDevice(PrimaryDevice *);
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bool DeleteDevice(const PrimaryDevice *);
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bool HasDeviceForLun(int) const;
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int ExtractInitiatorId(int id_data) const;
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// TODO Do not expose internal data
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ctrl_t* GetCtrl() { return &ctrl; }
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protected:
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BUS *bus;
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ctrl_t ctrl = {};
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private:
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int target_id;
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};
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