mirror of https://github.com/akuker/RASCSI.git
144 lines
3.8 KiB
C++
144 lines
3.8 KiB
C++
//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator PiSCSI
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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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// Host Services with realtime clock and shutdown support
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//
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//---------------------------------------------------------------------------
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//
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// Features of the host services device:
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//
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// 1. Vendor-specific mode page 0x20 returns the current date and time, see mode_page_datetime
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//
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// 2. START/STOP UNIT shuts down PiSCSI or shuts down/reboots the Raspberry Pi
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// a) !start && !load (STOP): Shut down PiSCSI
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// b) !start && load (EJECT): Shut down the Raspberry Pi
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// c) start && load (LOAD): Reboot the Raspberry Pi
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//
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#include "shared/piscsi_exceptions.h"
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#include "controllers/scsi_controller.h"
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#include "scsi_command_util.h"
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#include "host_services.h"
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#include <algorithm>
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using namespace scsi_defs;
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using namespace scsi_command_util;
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bool HostServices::Init(const unordered_map<string, string>& params)
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{
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ModePageDevice::Init(params);
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AddCommand(scsi_command::eCmdTestUnitReady, [this] { TestUnitReady(); });
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AddCommand(scsi_command::eCmdStartStop, [this] { StartStopUnit(); });
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SetReady(true);
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return true;
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}
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void HostServices::TestUnitReady()
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{
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// Always successful
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EnterStatusPhase();
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}
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vector<uint8_t> HostServices::InquiryInternal() const
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{
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return HandleInquiry(device_type::PROCESSOR, scsi_level::SPC_3, false);
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}
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void HostServices::StartStopUnit() const
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{
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const bool start = GetController()->GetCmd(4) & 0x01;
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const bool load = GetController()->GetCmd(4) & 0x02;
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if (!start) {
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if (load) {
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GetController()->ScheduleShutdown(AbstractController::piscsi_shutdown_mode::STOP_PI);
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}
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else {
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GetController()->ScheduleShutdown(AbstractController::piscsi_shutdown_mode::STOP_PISCSI);
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}
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}
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else if (load) {
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GetController()->ScheduleShutdown(AbstractController::piscsi_shutdown_mode::RESTART_PI);
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}
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else {
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throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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EnterStatusPhase();
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}
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int HostServices::ModeSense6(const vector<int>& cdb, vector<uint8_t>& buf) const
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{
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// Block descriptors cannot be returned
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if (!(cdb[1] & 0x08)) {
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throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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const auto length = static_cast<int>(min(buf.size(), static_cast<size_t>(cdb[4])));
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fill_n(buf.begin(), length, 0);
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// 4 bytes basic information
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const int size = AddModePages(cdb, buf, 4, length, 255);
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buf[0] = (uint8_t)size;
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return size;
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}
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int HostServices::ModeSense10(const vector<int>& cdb, vector<uint8_t>& buf) const
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{
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// Block descriptors cannot be returned
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if (!(cdb[1] & 0x08)) {
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throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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const auto length = static_cast<int>(min(buf.size(), static_cast<size_t>(GetInt16(cdb, 7))));
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fill_n(buf.begin(), length, 0);
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// 8 bytes basic information
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const int size = AddModePages(cdb, buf, 8, length, 65535);
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SetInt16(buf, 0, size);
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return size;
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}
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void HostServices::SetUpModePages(map<int, vector<byte>>& pages, int page, bool changeable) const
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{
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if (page == 0x20 || page == 0x3f) {
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AddRealtimeClockPage(pages, changeable);
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}
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}
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void HostServices::AddRealtimeClockPage(map<int, vector<byte>>& pages, bool changeable) const
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{
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pages[32] = vector<byte>(10);
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if (!changeable) {
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time_t t = time(nullptr);
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tm localtime;
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localtime_r(&t, &localtime);
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mode_page_datetime datetime;
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datetime.major_version = 0x01;
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datetime.minor_version = 0x00;
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datetime.year = (uint8_t)localtime.tm_year;
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datetime.month = (uint8_t)localtime.tm_mon;
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datetime.day = (uint8_t)localtime.tm_mday;
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datetime.hour = (uint8_t)localtime.tm_hour;
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datetime.minute = (uint8_t)localtime.tm_min;
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// Ignore leap second for simplicity
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datetime.second = (uint8_t)(localtime.tm_sec < 60 ? localtime.tm_sec : 59);
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memcpy(&pages[32][2], &datetime, sizeof(datetime));
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}
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}
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