RASCSI/cpp/devices/host_services.cpp
Daniel Markstedt 08194af424
Move C++ code into cpp/ dir (#941)
- Moved C++ code to cpp/ from src/raspberrypi
- Related updates to Makefile, easyinstall.sh, and the github build rules
- Removed the native X68k C code in src/x68k from the repo
2022-10-25 12:59:30 -07:00

156 lines
4.1 KiB
C++

//---------------------------------------------------------------------------
//
// SCSI Target Emulator RaSCSI Reloaded
// for Raspberry Pi
//
// Copyright (C) 2022 Uwe Seimet
//
// Host Services with realtime clock and shutdown support
//
//---------------------------------------------------------------------------
//
// Features of the host services device:
//
// 1. Vendor-specific mode page 0x20 returns the current date and time, see mode_page_datetime
//
// 2. START/STOP UNIT shuts down RaSCSI or shuts down/reboots the Raspberry Pi
// a) !start && !load (STOP): Shut down RaSCSI
// b) !start && load (EJECT): Shut down the Raspberry Pi
// c) start && load (LOAD): Reboot the Raspberry Pi
//
#include "controllers/controller_manager.h"
#include "controllers/scsi_controller.h"
#include "rascsi_exceptions.h"
#include "scsi_command_util.h"
#include "dispatcher.h"
#include "host_services.h"
#include <algorithm>
using namespace scsi_defs;
using namespace scsi_command_util;
HostServices::HostServices(int lun, const ControllerManager& manager)
: ModePageDevice(SCHS, lun), controller_manager(manager)
{
dispatcher.Add(scsi_command::eCmdTestUnitReady, "TestUnitReady", &HostServices::TestUnitReady);
dispatcher.Add(scsi_command::eCmdStartStop, "StartStopUnit", &HostServices::StartStopUnit);
SetReady(true);
}
bool HostServices::Dispatch(scsi_command cmd)
{
// The superclass class handles the less specific commands
return dispatcher.Dispatch(this, cmd) ? true : super::Dispatch(cmd);
}
void HostServices::TestUnitReady()
{
// Always successful
EnterStatusPhase();
}
vector<byte> HostServices::InquiryInternal() const
{
return HandleInquiry(device_type::PROCESSOR, scsi_level::SPC_3, false);
}
void HostServices::StartStopUnit()
{
const bool start = ctrl->cmd[4] & 0x01;
const bool load = ctrl->cmd[4] & 0x02;
if (!start) {
// Flush any caches
for (const auto& device : controller_manager.GetAllDevices()) {
device->FlushCache();
}
if (load) {
controller->ScheduleShutdown(AbstractController::rascsi_shutdown_mode::STOP_PI);
}
else {
controller->ScheduleShutdown(AbstractController::rascsi_shutdown_mode::STOP_RASCSI);
}
}
else if (load) {
controller->ScheduleShutdown(AbstractController::rascsi_shutdown_mode::RESTART_PI);
}
else {
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
}
EnterStatusPhase();
}
int HostServices::ModeSense6(const vector<int>& cdb, vector<BYTE>& buf) const
{
// Block descriptors cannot be returned
if (!(cdb[1] & 0x08)) {
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
}
const auto length = (int)min(buf.size(), (size_t)cdb[4]);
fill_n(buf.begin(), length, 0);
// 4 bytes basic information
int size = AddModePages(cdb, buf, 4, length, 255);
buf[0] = (BYTE)size;
return size;
}
int HostServices::ModeSense10(const vector<int>& cdb, vector<BYTE>& buf) const
{
// Block descriptors cannot be returned
if (!(cdb[1] & 0x08)) {
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
}
const auto length = (int)min(buf.size(), (size_t)GetInt16(cdb, 7));
fill_n(buf.begin(), length, 0);
// 8 bytes basic information
int size = AddModePages(cdb, buf, 8, length, 65535);
SetInt16(buf, 0, size);
return size;
}
void HostServices::SetUpModePages(map<int, vector<byte>>& pages, int page, bool changeable) const
{
if (page == 0x20 || page == 0x3f) {
AddRealtimeClockPage(pages, changeable);
}
}
void HostServices::AddRealtimeClockPage(map<int, vector<byte>>& pages, bool changeable) const
{
vector<byte> buf(10);
if (!changeable) {
time_t t = time(nullptr);
tm localtime;
localtime_r(&t, &localtime);
mode_page_datetime datetime;
datetime.major_version = 0x01;
datetime.minor_version = 0x00;
datetime.year = (uint8_t)localtime.tm_year;
datetime.month = (uint8_t)localtime.tm_mon;
datetime.day = (uint8_t)localtime.tm_mday;
datetime.hour = (uint8_t)localtime.tm_hour;
datetime.minute = (uint8_t)localtime.tm_min;
// Ignore leap second for simplicity
datetime.second = (uint8_t)(localtime.tm_sec < 60 ? localtime.tm_sec : 59);
memcpy(&buf[2], &datetime, sizeof(datetime));
}
pages[32] = buf;
}