mirror of https://github.com/akuker/RASCSI.git
912 lines
21 KiB
C++
912 lines
21 KiB
C++
//---------------------------------------------------------------------------
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//
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// X68000 EMULATOR "XM6"
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//
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// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
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// Copyright (C) 2014-2020 GIMONS
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//
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// XM6i
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// Copyright (C) 2010-2015 isaki@NetBSD.org
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// Copyright (C) 2010 Y.Sugahara
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//
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// Imported sava's Anex86/T98Next image and MO format support patch.
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// Comments translated to english by akuker.
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//
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//---------------------------------------------------------------------------
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#include "os.h"
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#include "fileio.h"
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#include "file_support.h"
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#include "rascsi_exceptions.h"
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#include "dispatcher.h"
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#include "scsi_command_util.h"
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#include "disk.h"
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using namespace scsi_defs;
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using namespace scsi_command_util;
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Disk::Disk(const string& type, int lun) : ModePageDevice(type, lun)
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{
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dispatcher.Add(scsi_command::eCmdRezero, "Rezero", &Disk::Rezero);
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dispatcher.Add(scsi_command::eCmdFormat, "FormatUnit", &Disk::FormatUnit);
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dispatcher.Add(scsi_command::eCmdReassign, "ReassignBlocks", &Disk::ReassignBlocks);
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dispatcher.Add(scsi_command::eCmdRead6, "Read6", &Disk::Read6);
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dispatcher.Add(scsi_command::eCmdWrite6, "Write6", &Disk::Write6);
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dispatcher.Add(scsi_command::eCmdSeek6, "Seek6", &Disk::Seek6);
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dispatcher.Add(scsi_command::eCmdReserve6, "Reserve6", &Disk::Reserve);
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dispatcher.Add(scsi_command::eCmdRelease6, "Release6", &Disk::Release);
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dispatcher.Add(scsi_command::eCmdStartStop, "StartStopUnit", &Disk::StartStopUnit);
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dispatcher.Add(scsi_command::eCmdSendDiag, "SendDiagnostic", &Disk::SendDiagnostic);
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dispatcher.Add(scsi_command::eCmdRemoval, "PreventAllowMediumRemoval", &Disk::PreventAllowMediumRemoval);
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dispatcher.Add(scsi_command::eCmdReadCapacity10, "ReadCapacity10", &Disk::ReadCapacity10);
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dispatcher.Add(scsi_command::eCmdRead10, "Read10", &Disk::Read10);
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dispatcher.Add(scsi_command::eCmdWrite10, "Write10", &Disk::Write10);
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dispatcher.Add(scsi_command::eCmdReadLong10, "ReadLong10", &Disk::ReadWriteLong10);
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dispatcher.Add(scsi_command::eCmdWriteLong10, "WriteLong10", &Disk::ReadWriteLong10);
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dispatcher.Add(scsi_command::eCmdWriteLong16, "WriteLong16", &Disk::ReadWriteLong16);
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dispatcher.Add(scsi_command::eCmdSeek10, "Seek10", &Disk::Seek10);
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dispatcher.Add(scsi_command::eCmdVerify10, "Verify10", &Disk::Verify10);
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dispatcher.Add(scsi_command::eCmdSynchronizeCache10, "SynchronizeCache10", &Disk::SynchronizeCache);
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dispatcher.Add(scsi_command::eCmdSynchronizeCache16, "SynchronizeCache16", &Disk::SynchronizeCache);
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dispatcher.Add(scsi_command::eCmdReadDefectData10, "ReadDefectData10", &Disk::ReadDefectData10);
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dispatcher.Add(scsi_command::eCmdReserve10, "Reserve10", &Disk::Reserve);
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dispatcher.Add(scsi_command::eCmdRelease10, "Release10", &Disk::Release);
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dispatcher.Add(scsi_command::eCmdRead16, "Read16", &Disk::Read16);
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dispatcher.Add(scsi_command::eCmdWrite16, "Write16", &Disk::Write16);
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dispatcher.Add(scsi_command::eCmdVerify16, "Verify16", &Disk::Verify16);
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dispatcher.Add(scsi_command::eCmdReadCapacity16_ReadLong16, "ReadCapacity16/ReadLong16", &Disk::ReadCapacity16_ReadLong16);
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}
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Disk::~Disk()
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{
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// Save disk cache, only if ready
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if (IsReady() && cache != nullptr) {
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cache->Save();
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}
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}
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bool Disk::Dispatch(scsi_command cmd)
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{
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// Media changes must be reported on the next access, i.e. not only for TEST UNIT READY
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if (is_medium_changed) {
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assert(IsRemovable());
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is_medium_changed = false;
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throw scsi_error_exception(sense_key::UNIT_ATTENTION, asc::NOT_READY_TO_READY_CHANGE);
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}
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// The superclass handles the less specific commands
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return dispatcher.Dispatch(this, cmd) ? true : super::Dispatch(cmd);
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}
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//---------------------------------------------------------------------------
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//
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// Open
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// * Call as a post-process after successful opening in a derived class
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//
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//---------------------------------------------------------------------------
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void Disk::Open(const Filepath& path)
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{
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if (blocks == 0) {
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throw io_exception("Disk has 0 blocks");
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}
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SetReady(true);
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// Can read/write open
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if (Fileio fio; fio.Open(path, Fileio::OpenMode::ReadWrite)) {
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// Write permission
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fio.Close();
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} else {
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// Permanently write-protected
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SetReadOnly(true);
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SetProtectable(false);
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SetProtected(false);
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}
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SetStopped(false);
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SetRemoved(false);
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SetLocked(false);
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}
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void Disk::SetUpCache(const Filepath& path, off_t image_offset, bool raw)
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{
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assert(cache == nullptr);
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cache = make_unique<DiskCache>(path, size_shift_count, (uint32_t)blocks, image_offset);
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cache->SetRawMode(raw);
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}
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void Disk::ResizeCache(const Filepath& path, bool raw)
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{
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cache.reset(new DiskCache(path, GetSectorSizeShiftCount(), (uint32_t)blocks));
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cache->SetRawMode(raw);
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}
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void Disk::FlushCache()
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{
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if (cache != nullptr) {
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cache->Save();
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}
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}
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void Disk::Rezero()
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{
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Seek();
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}
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void Disk::FormatUnit()
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{
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CheckReady();
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// FMTDATA=1 is not supported (but OK if there is no DEFECT LIST)
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if ((ctrl->cmd[1] & 0x10) != 0 && ctrl->cmd[4] != 0) {
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throw scsi_error_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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void Disk::ReassignBlocks()
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{
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Seek();
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}
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void Disk::Read(access_mode mode)
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{
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if (uint64_t start; CheckAndGetStartAndCount(start, ctrl->blocks, mode)) {
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ctrl->length = Read(ctrl->cmd, controller->GetBuffer(), start);
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LOGTRACE("%s ctrl.length is %d", __PRETTY_FUNCTION__, controller->GetLength())
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// Set next block
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ctrl->next = start + 1;
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EnterDataInPhase();
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}
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else {
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EnterStatusPhase();
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}
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}
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void Disk::Read6()
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{
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Read(RW6);
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}
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void Disk::Read10()
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{
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Read(RW10);
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}
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void Disk::Read16()
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{
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Read(RW16);
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}
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void Disk::ReadWriteLong10()
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{
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// Transfer lengths other than 0 are not supported, which is compliant with the SCSI standard
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if (GetInt16(ctrl->cmd, 7) != 0) {
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throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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ValidateBlockAddress(RW10);
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EnterStatusPhase();
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}
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void Disk::ReadWriteLong16()
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{
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// Transfer lengths other than 0 are not supported, which is compliant with the SCSI standard
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if (GetInt16(ctrl->cmd, 12) != 0) {
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throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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ValidateBlockAddress(RW16);
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EnterStatusPhase();
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}
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void Disk::Write(access_mode mode)
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{
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if (uint64_t start; CheckAndGetStartAndCount(start, ctrl->blocks, mode)) {
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ctrl->length = WriteCheck(start);
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// Set next block
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ctrl->next = start + 1;
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EnterDataOutPhase();
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}
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else {
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EnterStatusPhase();
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}
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}
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void Disk::Write6()
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{
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Write(RW6);
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}
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void Disk::Write10()
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{
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Write(RW10);
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}
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void Disk::Write16()
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{
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Write(RW16);
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}
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void Disk::Verify(access_mode mode)
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{
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if (uint64_t start; CheckAndGetStartAndCount(start, ctrl->blocks, mode)) {
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// if BytChk=0
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if ((ctrl->cmd[1] & 0x02) == 0) {
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Seek();
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return;
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}
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// Test reading
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ctrl->length = Read(ctrl->cmd, controller->GetBuffer(), start);
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// Set next block
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ctrl->next = start + 1;
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EnterDataOutPhase();
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}
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else {
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EnterStatusPhase();
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}
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}
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void Disk::Verify10()
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{
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Verify(RW10);
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}
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void Disk::Verify16()
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{
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Verify(RW16);
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}
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void Disk::StartStopUnit()
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{
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bool start = ctrl->cmd[4] & 0x01;
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bool load = ctrl->cmd[4] & 0x02;
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if (load) {
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LOGTRACE(start ? "Loading medium" : "Ejecting medium")
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}
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else {
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LOGTRACE(start ? "Starting unit" : "Stopping unit")
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SetStopped(!start);
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}
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if (!start) {
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FlushCache();
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// Look at the eject bit and eject if necessary
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if (load) {
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if (IsLocked()) {
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// Cannot be ejected because it is locked
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throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::LOAD_OR_EJECT_FAILED);
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}
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// Eject
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if (!Eject(false)) {
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throw scsi_error_exception();
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}
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}
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}
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EnterStatusPhase();
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}
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void Disk::SendDiagnostic()
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{
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// Do not support PF bit
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if (ctrl->cmd[1] & 0x10) {
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throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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// Do not support parameter list
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if ((ctrl->cmd[3] != 0) || (ctrl->cmd[4] != 0)) {
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throw scsi_error_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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void Disk::PreventAllowMediumRemoval()
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{
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CheckReady();
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bool lock = ctrl->cmd[4] & 0x01;
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LOGTRACE(lock ? "Locking medium" : "Unlocking medium")
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SetLocked(lock);
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EnterStatusPhase();
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}
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void Disk::SynchronizeCache()
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{
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FlushCache();
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EnterStatusPhase();
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}
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void Disk::ReadDefectData10()
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{
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size_t allocation_length = min((size_t)GetInt16(ctrl->cmd, 7), (size_t)4);
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// The defect list is empty
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fill_n(controller->GetBuffer().begin(), allocation_length, 0);
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ctrl->length = (int)allocation_length;
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EnterDataInPhase();
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}
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void Disk::MediumChanged()
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{
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if (IsRemovable()) {
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is_medium_changed = true;
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}
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else {
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LOGERROR("Medium change requested for non-removable medium")
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}
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}
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bool Disk::Eject(bool force)
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{
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bool status = super::Eject(force);
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if (status) {
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FlushCache();
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cache.reset();
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// The image file for this drive is not in use anymore
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if (auto file_support = dynamic_cast<FileSupport *>(this); file_support) {
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file_support->UnreserveFile();
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}
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}
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return status;
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}
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int Disk::ModeSense6(const vector<int>& cdb, vector<BYTE>& buf) const
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{
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// Get length, clear buffer
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auto length = (int)min(buf.size(), (size_t)cdb[4]);
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fill_n(buf.begin(), length, 0);
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// DEVICE SPECIFIC PARAMETER
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if (IsProtected()) {
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buf[2] = 0x80;
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}
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// Basic information
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int size = 4;
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// Add block descriptor if DBD is 0
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if ((cdb[1] & 0x08) == 0) {
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// Mode parameter header, block descriptor length
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buf[3] = 0x08;
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// Only if ready
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if (IsReady()) {
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// Short LBA mode parameter block descriptor (number of blocks and block length)
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SetInt32(buf, 4, (uint32_t)blocks);
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SetInt32(buf, 8, GetSectorSizeInBytes());
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}
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size = 12;
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}
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size += super::AddModePages(cdb, buf, size, length - size);
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if (size > 255) {
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throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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// Do not return more than ALLOCATION LENGTH bytes
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if (size > length) {
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size = length;
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}
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// Final setting of mode data length
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buf[0] = (BYTE)size;
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return size;
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}
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int Disk::ModeSense10(const vector<int>& cdb, vector<BYTE>& buf) const
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{
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// Get length, clear buffer
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auto length = (int)min(buf.size(), (size_t)GetInt16(cdb, 7));
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fill_n(buf.begin(), length, 0);
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// DEVICE SPECIFIC PARAMETER
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if (IsProtected()) {
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buf[3] = 0x80;
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}
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// Basic Information
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int size = 8;
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// Add block descriptor if DBD is 0, only if ready
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if ((cdb[1] & 0x08) == 0 && IsReady()) {
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uint64_t disk_blocks = blocks;
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uint32_t disk_size = GetSectorSizeInBytes();
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// Check LLBAA for short or long block descriptor
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if ((cdb[1] & 0x10) == 0 || disk_blocks <= 0xFFFFFFFF) {
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// Mode parameter header, block descriptor length
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buf[7] = 0x08;
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// Short LBA mode parameter block descriptor (number of blocks and block length)
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SetInt32(buf, 8, (uint32_t)disk_blocks);
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SetInt32(buf, 12, disk_size);
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size = 16;
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}
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else {
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// Mode parameter header, LONGLBA
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buf[4] = 0x01;
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// Mode parameter header, block descriptor length
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buf[7] = 0x10;
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// Long LBA mode parameter block descriptor (number of blocks and block length)
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SetInt64(buf, 8, disk_blocks);
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SetInt32(buf, 20, disk_size);
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size = 24;
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}
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}
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size += super::AddModePages(cdb, buf, size, length - size);
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if (size > 65535) {
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throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
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}
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// Do not return more than ALLOCATION LENGTH bytes
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if (size > length) {
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size = length;
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}
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// Final setting of mode data length
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SetInt16(buf, 0, size);
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return size;
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}
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void Disk::SetUpModePages(map<int, vector<byte>>& pages, int page, bool changeable) const
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{
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// Page code 1 (read-write error recovery)
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if (page == 0x01 || page == 0x3f) {
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AddErrorPage(pages, changeable);
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}
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// Page code 3 (format device)
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if (page == 0x03 || page == 0x3f) {
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AddFormatPage(pages, changeable);
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}
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// Page code 4 (drive parameter)
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if (page == 0x04 || page == 0x3f) {
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AddDrivePage(pages, changeable);
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}
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// Page code 8 (caching)
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if (page == 0x08 || page == 0x3f) {
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AddCachePage(pages, changeable);
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}
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// Page (vendor special)
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AddVendorPage(pages, page, changeable);
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}
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void Disk::AddErrorPage(map<int, vector<byte>>& pages, bool) const
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{
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vector<byte> buf(12);
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// Retry count is 0, limit time uses internal default value
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pages[1] = buf;
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}
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void Disk::AddFormatPage(map<int, vector<byte>>& pages, bool changeable) const
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{
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vector<byte> buf(24);
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// No changeable area
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if (changeable) {
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pages[3] = buf;
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return;
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}
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if (IsReady()) {
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// Set the number of tracks in one zone to 8
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buf[0x03] = (byte)0x08;
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// Set sector/track to 25
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SetInt16(buf, 0x0a, 25);
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// Set the number of bytes in the physical sector
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SetInt16(buf, 0x0c, 1 << size_shift_count);
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// Interleave 1
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SetInt16(buf, 0x0e, 1);
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// Track skew factor 11
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SetInt16(buf, 0x10, 11);
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// Cylinder skew factor 20
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SetInt16(buf, 0x12, 20);
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}
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buf[20] = IsRemovable() ? (byte)0x20 : (byte)0x00;
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// Hard-sectored
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buf[20] |= (byte)0x40;
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||
pages[3] = buf;
|
||
}
|
||
|
||
void Disk::AddDrivePage(map<int, vector<byte>>& pages, bool changeable) const
|
||
{
|
||
vector<byte> buf(24);
|
||
|
||
// No changeable area
|
||
if (changeable) {
|
||
pages[4] = buf;
|
||
|
||
return;
|
||
}
|
||
|
||
if (IsReady()) {
|
||
// Set the number of cylinders (total number of blocks
|
||
// divided by 25 sectors/track and 8 heads)
|
||
uint64_t cylinders = blocks;
|
||
cylinders >>= 3;
|
||
cylinders /= 25;
|
||
SetInt32(buf, 0x01, (uint32_t)cylinders);
|
||
|
||
// Fix the head at 8
|
||
buf[0x05] = (byte)0x8;
|
||
|
||
// Medium rotation rate 7200
|
||
SetInt16(buf, 0x14, 7200);
|
||
}
|
||
|
||
pages[4] = buf;
|
||
}
|
||
|
||
void Disk::AddCachePage(map<int, vector<byte>>& pages, bool changeable) const
|
||
{
|
||
vector<byte> buf(12);
|
||
|
||
// No changeable area
|
||
if (changeable) {
|
||
pages[8] = buf;
|
||
|
||
return;
|
||
}
|
||
|
||
// Only read cache is valid
|
||
|
||
// Disable pre-fetch transfer length
|
||
SetInt16(buf, 0x04, -1);
|
||
|
||
// Maximum pre-fetch
|
||
SetInt16(buf, 0x08, -1);
|
||
|
||
// Maximum pre-fetch ceiling
|
||
SetInt16(buf, 0x0a, -1);
|
||
|
||
pages[8] = buf;
|
||
}
|
||
|
||
void Disk::AddVendorPage(map<int, vector<byte>>&, int, bool) const
|
||
{
|
||
// Nothing to add by default
|
||
}
|
||
|
||
// TODO Read more than one block in a single call. Currently blocked by the the track-oriented cache
|
||
int Disk::Read(const vector<int>&, vector<BYTE>& buf, uint64_t block)
|
||
{
|
||
LOGTRACE("%s", __PRETTY_FUNCTION__)
|
||
|
||
CheckReady();
|
||
|
||
// Error if the total number of blocks is exceeded
|
||
if (block >= blocks) {
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
||
}
|
||
|
||
// leave it to the cache
|
||
if (!cache->ReadSector(buf, (uint32_t)block)) {
|
||
throw scsi_error_exception(sense_key::MEDIUM_ERROR, asc::READ_FAULT);
|
||
}
|
||
|
||
// Success
|
||
return 1 << size_shift_count;
|
||
}
|
||
|
||
int Disk::WriteCheck(uint64_t block)
|
||
{
|
||
CheckReady();
|
||
|
||
// Error if the total number of blocks is exceeded
|
||
if (block >= blocks) {
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
||
}
|
||
|
||
// Error if write protected
|
||
if (IsProtected()) {
|
||
throw scsi_error_exception(sense_key::DATA_PROTECT, asc::WRITE_PROTECTED);
|
||
}
|
||
|
||
// Success
|
||
return 1 << size_shift_count;
|
||
}
|
||
|
||
// TODO Write more than one block in a single call. Currently blocked by the track-oriented cache
|
||
void Disk::Write(const vector<int>&, const vector<BYTE>& buf, uint64_t block)
|
||
{
|
||
LOGTRACE("%s", __PRETTY_FUNCTION__)
|
||
|
||
// Error if not ready
|
||
if (!IsReady()) {
|
||
throw scsi_error_exception(sense_key::NOT_READY);
|
||
}
|
||
|
||
// Error if the total number of blocks is exceeded
|
||
if (block >= blocks) {
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::LBA_OUT_OF_RANGE);
|
||
}
|
||
|
||
// Error if write protected
|
||
if (IsProtected()) {
|
||
throw scsi_error_exception(sense_key::DATA_PROTECT, asc::WRITE_PROTECTED);
|
||
}
|
||
|
||
// Leave it to the cache
|
||
if (!cache->WriteSector(buf, (uint32_t)block)) {
|
||
throw scsi_error_exception(sense_key::MEDIUM_ERROR, asc::WRITE_FAULT);
|
||
}
|
||
}
|
||
|
||
void Disk::Seek()
|
||
{
|
||
CheckReady();
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::Seek6()
|
||
{
|
||
if (uint64_t start; CheckAndGetStartAndCount(start, ctrl->blocks, SEEK6)) {
|
||
CheckReady();
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::Seek10()
|
||
{
|
||
if (uint64_t start; CheckAndGetStartAndCount(start, ctrl->blocks, SEEK10)) {
|
||
CheckReady();
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::ReadCapacity10()
|
||
{
|
||
CheckReady();
|
||
|
||
if (blocks == 0) {
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::MEDIUM_NOT_PRESENT);
|
||
}
|
||
|
||
vector<BYTE>& buf = controller->GetBuffer();
|
||
|
||
// Create end of logical block address (blocks-1)
|
||
uint64_t capacity = blocks - 1;
|
||
|
||
// If the capacity exceeds 32 bit, -1 must be returned and the client has to use READ CAPACITY(16)
|
||
if (capacity > 4294967295) {
|
||
capacity = -1;
|
||
}
|
||
SetInt32(buf, 0, (uint32_t)capacity);
|
||
|
||
// Create block length (1 << size)
|
||
SetInt32(buf, 4, 1 << size_shift_count);
|
||
|
||
// the size
|
||
ctrl->length = 8;
|
||
|
||
EnterDataInPhase();
|
||
}
|
||
|
||
void Disk::ReadCapacity16()
|
||
{
|
||
CheckReady();
|
||
|
||
if (blocks == 0) {
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::MEDIUM_NOT_PRESENT);
|
||
}
|
||
|
||
vector<BYTE>& buf = controller->GetBuffer();
|
||
|
||
// Create end of logical block address (blocks-1)
|
||
SetInt64(buf, 0, blocks - 1);
|
||
|
||
// Create block length (1 << size)
|
||
SetInt32(buf, 8, 1 << size_shift_count);
|
||
|
||
buf[12] = 0;
|
||
|
||
// Logical blocks per physical block: not reported (1 or more)
|
||
buf[13] = 0;
|
||
|
||
// the size
|
||
ctrl->length = 14;
|
||
|
||
EnterDataInPhase();
|
||
}
|
||
|
||
void Disk::ReadCapacity16_ReadLong16()
|
||
{
|
||
// The service action determines the actual command
|
||
switch (ctrl->cmd[1] & 0x1f) {
|
||
case 0x10:
|
||
ReadCapacity16();
|
||
break;
|
||
|
||
case 0x11:
|
||
ReadWriteLong16();
|
||
break;
|
||
|
||
default:
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
||
break;
|
||
}
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// RESERVE/RELEASE(6/10)
|
||
//
|
||
// The reserve/release commands are only used in multi-initiator
|
||
// environments. RaSCSI doesn't support this use case. However, some old
|
||
// versions of Solaris will issue the reserve/release commands. We will
|
||
// just respond with an OK status.
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void Disk::Reserve()
|
||
{
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::Release()
|
||
{
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// Check/Get start sector and sector count for a READ/WRITE or READ/WRITE LONG operation
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
|
||
void Disk::ValidateBlockAddress(access_mode mode) const
|
||
{
|
||
uint64_t block = mode == RW16 ? GetInt64(ctrl->cmd, 2) : GetInt32(ctrl->cmd, 2);
|
||
|
||
uint64_t capacity = blocks;
|
||
|
||
if (block > capacity) {
|
||
LOGTRACE("%s", ("Capacity of " + to_string(capacity) + " block(s) exceeded: Trying to access block "
|
||
+ to_string(block)).c_str())
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::LBA_OUT_OF_RANGE);
|
||
}
|
||
}
|
||
|
||
bool Disk::CheckAndGetStartAndCount(uint64_t& start, uint32_t& count, access_mode mode) const
|
||
{
|
||
if (mode == RW6 || mode == SEEK6) {
|
||
start = GetInt24(ctrl->cmd, 1);
|
||
|
||
count = ctrl->cmd[4];
|
||
if (!count) {
|
||
count= 0x100;
|
||
}
|
||
}
|
||
else {
|
||
start = mode == RW16 ? GetInt64(ctrl->cmd, 2) : GetInt32(ctrl->cmd, 2);
|
||
|
||
if (mode == RW16) {
|
||
count = GetInt32(ctrl->cmd, 10);
|
||
}
|
||
else if (mode != SEEK6 && mode != SEEK10) {
|
||
count = GetInt16(ctrl->cmd, 7);
|
||
}
|
||
else {
|
||
count = 0;
|
||
}
|
||
}
|
||
|
||
LOGTRACE("%s READ/WRITE/VERIFY/SEEK command record=$%08X blocks=%d", __PRETTY_FUNCTION__, (uint32_t)start, count)
|
||
|
||
// Check capacity
|
||
if (uint64_t capacity = blocks; start > capacity || start + count > capacity) {
|
||
LOGTRACE("%s", ("Capacity of " + to_string(capacity) + " block(s) exceeded: Trying to access block "
|
||
+ to_string(start) + ", block count " + to_string(count)).c_str())
|
||
throw scsi_error_exception(sense_key::ILLEGAL_REQUEST, asc::LBA_OUT_OF_RANGE);
|
||
}
|
||
|
||
// Do not process 0 blocks
|
||
if (!count && (mode != SEEK6 && mode != SEEK10)) {
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
uint32_t Disk::GetSectorSizeInBytes() const
|
||
{
|
||
return size_shift_count ? 1 << size_shift_count : 0;
|
||
}
|
||
|
||
void Disk::SetSectorSizeInBytes(uint32_t size_in_bytes)
|
||
{
|
||
DeviceFactory device_factory;
|
||
if (unordered_set<uint32_t> sizes = device_factory.GetSectorSizes(GetType());
|
||
!sizes.empty() && sizes.find(size_in_bytes) == sizes.end()) {
|
||
throw io_exception("Invalid block size of " + to_string(size_in_bytes) + " bytes");
|
||
}
|
||
|
||
switch (size_in_bytes) {
|
||
case 512:
|
||
size_shift_count = 9;
|
||
break;
|
||
|
||
case 1024:
|
||
size_shift_count = 10;
|
||
break;
|
||
|
||
case 2048:
|
||
size_shift_count = 11;
|
||
break;
|
||
|
||
case 4096:
|
||
size_shift_count = 12;
|
||
break;
|
||
|
||
default:
|
||
throw io_exception("Invalid block size of " + to_string(size_in_bytes) + " bytes");
|
||
break;
|
||
}
|
||
}
|
||
|
||
uint32_t Disk::GetConfiguredSectorSize() const
|
||
{
|
||
return configured_sector_size;
|
||
}
|
||
|
||
bool Disk::SetConfiguredSectorSize(const DeviceFactory& device_factory, uint32_t configured_size)
|
||
{
|
||
if (unordered_set<uint32_t> sizes = device_factory.GetSectorSizes(GetType());
|
||
sizes.find(configured_size) == sizes.end()) {
|
||
return false;
|
||
}
|
||
|
||
configured_sector_size = configured_size;
|
||
|
||
return true;
|
||
}
|