mirror of
https://github.com/akuker/RASCSI.git
synced 2024-11-29 16:49:55 +00:00
ef6cd97656
* Set TB, PER and DTE bits in read/write error recovery page * Fixed typo * Added unit test * Comment update
718 lines
17 KiB
C++
718 lines
17 KiB
C++
//---------------------------------------------------------------------------
|
||
//
|
||
// X68000 EMULATOR "XM6"
|
||
//
|
||
// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
|
||
// Copyright (C) 2014-2020 GIMONS
|
||
//
|
||
// XM6i
|
||
// Copyright (C) 2010-2015 isaki@NetBSD.org
|
||
// Copyright (C) 2010 Y.Sugahara
|
||
//
|
||
// Imported sava's Anex86/T98Next image and MO format support patch.
|
||
// Comments translated to english by akuker.
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
|
||
#include "shared/piscsi_exceptions.h"
|
||
#include "scsi_command_util.h"
|
||
#include "disk.h"
|
||
#include <sstream>
|
||
#include <iomanip>
|
||
|
||
using namespace scsi_defs;
|
||
using namespace scsi_command_util;
|
||
|
||
Disk::~Disk()
|
||
{
|
||
// Save disk cache, only if ready
|
||
if (IsReady() && cache != nullptr) {
|
||
cache->Save();
|
||
}
|
||
}
|
||
|
||
bool Disk::Init(const unordered_map<string, string>& params)
|
||
{
|
||
StorageDevice::Init(params);
|
||
|
||
// REZERO implementation is identical with Seek
|
||
AddCommand(scsi_command::eCmdRezero, [this] { Seek(); });
|
||
AddCommand(scsi_command::eCmdFormatUnit, [this] { FormatUnit(); });
|
||
// REASSIGN BLOCKS implementation is identical with Seek
|
||
AddCommand(scsi_command::eCmdReassignBlocks, [this] { Seek(); });
|
||
AddCommand(scsi_command::eCmdRead6, [this] { Read6(); });
|
||
AddCommand(scsi_command::eCmdWrite6, [this] { Write6(); });
|
||
AddCommand(scsi_command::eCmdSeek6, [this] { Seek6(); });
|
||
AddCommand(scsi_command::eCmdStartStop, [this] { StartStopUnit(); });
|
||
AddCommand(scsi_command::eCmdPreventAllowMediumRemoval, [this]{ PreventAllowMediumRemoval(); });
|
||
AddCommand(scsi_command::eCmdReadCapacity10, [this] { ReadCapacity10(); });
|
||
AddCommand(scsi_command::eCmdRead10, [this] { Read10(); });
|
||
AddCommand(scsi_command::eCmdWrite10, [this] { Write10(); });
|
||
AddCommand(scsi_command::eCmdReadLong10, [this] { ReadWriteLong10(); });
|
||
AddCommand(scsi_command::eCmdWriteLong10, [this] { ReadWriteLong10(); });
|
||
AddCommand(scsi_command::eCmdWriteLong16, [this] { ReadWriteLong16(); });
|
||
AddCommand(scsi_command::eCmdSeek10, [this] { Seek10(); });
|
||
AddCommand(scsi_command::eCmdVerify10, [this] { Verify10(); });
|
||
AddCommand(scsi_command::eCmdSynchronizeCache10, [this] { SynchronizeCache(); });
|
||
AddCommand(scsi_command::eCmdSynchronizeCache16, [this] { SynchronizeCache(); });
|
||
AddCommand(scsi_command::eCmdReadDefectData10, [this] { ReadDefectData10(); });
|
||
AddCommand(scsi_command::eCmdRead16,[this] { Read16(); });
|
||
AddCommand(scsi_command::eCmdWrite16, [this] { Write16(); });
|
||
AddCommand(scsi_command::eCmdVerify16, [this] { Verify16(); });
|
||
AddCommand(scsi_command::eCmdReadCapacity16_ReadLong16, [this] { ReadCapacity16_ReadLong16(); });
|
||
|
||
return true;
|
||
}
|
||
|
||
void Disk::Dispatch(scsi_command cmd)
|
||
{
|
||
// Media changes must be reported on the next access, i.e. not only for TEST UNIT READY
|
||
if (IsMediumChanged()) {
|
||
assert(IsRemovable());
|
||
|
||
SetMediumChanged(false);
|
||
|
||
GetController()->Error(sense_key::UNIT_ATTENTION, asc::NOT_READY_TO_READY_CHANGE);
|
||
}
|
||
else {
|
||
PrimaryDevice::Dispatch(cmd);
|
||
}
|
||
}
|
||
|
||
void Disk::SetUpCache(off_t image_offset, bool raw)
|
||
{
|
||
cache = make_unique<DiskCache>(GetFilename(), size_shift_count, static_cast<uint32_t>(GetBlockCount()), image_offset);
|
||
cache->SetRawMode(raw);
|
||
}
|
||
|
||
void Disk::ResizeCache(const string& path, bool raw)
|
||
{
|
||
cache.reset(new DiskCache(path, size_shift_count, static_cast<uint32_t>(GetBlockCount())));
|
||
cache->SetRawMode(raw);
|
||
}
|
||
|
||
void Disk::FlushCache()
|
||
{
|
||
if (cache != nullptr) {
|
||
cache->Save();
|
||
}
|
||
}
|
||
|
||
void Disk::FormatUnit()
|
||
{
|
||
CheckReady();
|
||
|
||
// FMTDATA=1 is not supported (but OK if there is no DEFECT LIST)
|
||
if ((GetController()->GetCmd(1) & 0x10) != 0 && GetController()->GetCmd(4) != 0) {
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::Read(access_mode mode)
|
||
{
|
||
const auto& [valid, start, blocks] = CheckAndGetStartAndCount(mode);
|
||
if (valid) {
|
||
GetController()->SetBlocks(blocks);
|
||
GetController()->SetLength(Read(GetController()->GetCmd(), GetController()->GetBuffer(), start));
|
||
|
||
GetLogger().Trace("Length is " + to_string(GetController()->GetLength()));
|
||
|
||
// Set next block
|
||
GetController()->SetNext(start + 1);
|
||
|
||
EnterDataInPhase();
|
||
}
|
||
else {
|
||
EnterStatusPhase();
|
||
}
|
||
}
|
||
|
||
void Disk::ReadWriteLong10() const
|
||
{
|
||
ValidateBlockAddress(RW10);
|
||
|
||
// Transfer lengths other than 0 are not supported, which is compliant with the SCSI standard
|
||
if (GetInt16(GetController()->GetCmd(), 7) != 0) {
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::ReadWriteLong16() const
|
||
{
|
||
ValidateBlockAddress(RW16);
|
||
|
||
// Transfer lengths other than 0 are not supported, which is compliant with the SCSI standard
|
||
if (GetInt16(GetController()->GetCmd(), 12) != 0) {
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::Write(access_mode mode) const
|
||
{
|
||
if (IsProtected()) {
|
||
throw scsi_exception(sense_key::DATA_PROTECT, asc::WRITE_PROTECTED);
|
||
}
|
||
|
||
const auto& [valid, start, blocks] = CheckAndGetStartAndCount(mode);
|
||
if (valid) {
|
||
GetController()->SetBlocks(blocks);
|
||
GetController()->SetLength(GetSectorSizeInBytes());
|
||
|
||
// Set next block
|
||
GetController()->SetNext(start + 1);
|
||
|
||
EnterDataOutPhase();
|
||
}
|
||
else {
|
||
EnterStatusPhase();
|
||
}
|
||
}
|
||
|
||
void Disk::Verify(access_mode mode)
|
||
{
|
||
const auto& [valid, start, blocks] = CheckAndGetStartAndCount(mode);
|
||
if (valid) {
|
||
// if BytChk=0
|
||
if ((GetController()->GetCmd(1) & 0x02) == 0) {
|
||
Seek();
|
||
return;
|
||
}
|
||
|
||
// Test reading
|
||
GetController()->SetBlocks(blocks);
|
||
GetController()->SetLength(Read(GetController()->GetCmd(), GetController()->GetBuffer(), start));
|
||
|
||
// Set next block
|
||
GetController()->SetNext(start + 1);
|
||
|
||
EnterDataOutPhase();
|
||
}
|
||
else {
|
||
EnterStatusPhase();
|
||
}
|
||
}
|
||
|
||
void Disk::StartStopUnit()
|
||
{
|
||
const bool start = GetController()->GetCmd(4) & 0x01;
|
||
const bool load = GetController()->GetCmd(4) & 0x02;
|
||
|
||
if (load) {
|
||
GetLogger().Trace(start ? "Loading medium" : "Ejecting medium");
|
||
}
|
||
else {
|
||
GetLogger().Trace(start ? "Starting unit" : "Stopping unit");
|
||
|
||
SetStopped(!start);
|
||
}
|
||
|
||
if (!start) {
|
||
// Look at the eject bit and eject if necessary
|
||
if (load) {
|
||
if (IsLocked()) {
|
||
// Cannot be ejected because it is locked
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::LOAD_OR_EJECT_FAILED);
|
||
}
|
||
|
||
// Eject
|
||
if (!Eject(false)) {
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::LOAD_OR_EJECT_FAILED);
|
||
}
|
||
}
|
||
else {
|
||
FlushCache();
|
||
}
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::PreventAllowMediumRemoval()
|
||
{
|
||
CheckReady();
|
||
|
||
const bool lock = GetController()->GetCmd(4) & 0x01;
|
||
|
||
GetLogger().Trace(lock ? "Locking medium" : "Unlocking medium");
|
||
|
||
SetLocked(lock);
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::SynchronizeCache()
|
||
{
|
||
FlushCache();
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::ReadDefectData10() const
|
||
{
|
||
const size_t allocation_length = min(static_cast<size_t>(GetInt16(GetController()->GetCmd(), 7)),
|
||
static_cast<size_t>(4));
|
||
|
||
// The defect list is empty
|
||
fill_n(GetController()->GetBuffer().begin(), allocation_length, 0);
|
||
GetController()->SetLength(static_cast<uint32_t>(allocation_length));
|
||
|
||
EnterDataInPhase();
|
||
}
|
||
|
||
bool Disk::Eject(bool force)
|
||
{
|
||
const bool status = PrimaryDevice::Eject(force);
|
||
if (status) {
|
||
FlushCache();
|
||
cache.reset();
|
||
|
||
// The image file for this drive is not in use anymore
|
||
UnreserveFile();
|
||
}
|
||
|
||
return status;
|
||
}
|
||
|
||
int Disk::ModeSense6(const vector<int>& cdb, vector<uint8_t>& buf) const
|
||
{
|
||
// Get length, clear buffer
|
||
const auto length = static_cast<int>(min(buf.size(), static_cast<size_t>(cdb[4])));
|
||
fill_n(buf.begin(), length, 0);
|
||
|
||
// DEVICE SPECIFIC PARAMETER
|
||
if (IsProtected()) {
|
||
buf[2] = 0x80;
|
||
}
|
||
|
||
// Basic information
|
||
int size = 4;
|
||
|
||
// Add block descriptor if DBD is 0
|
||
if ((cdb[1] & 0x08) == 0) {
|
||
// Mode parameter header, block descriptor length
|
||
buf[3] = 0x08;
|
||
|
||
// Only if ready
|
||
if (IsReady()) {
|
||
// Short LBA mode parameter block descriptor (number of blocks and block length)
|
||
SetInt32(buf, 4, static_cast<uint32_t>(GetBlockCount()));
|
||
SetInt32(buf, 8, GetSectorSizeInBytes());
|
||
}
|
||
|
||
size = 12;
|
||
}
|
||
|
||
size = AddModePages(cdb, buf, size, length, 255);
|
||
|
||
buf[0] = (uint8_t)size;
|
||
|
||
return size;
|
||
}
|
||
|
||
int Disk::ModeSense10(const vector<int>& cdb, vector<uint8_t>& buf) const
|
||
{
|
||
// Get length, clear buffer
|
||
const auto length = static_cast<int>(min(buf.size(), static_cast<size_t>(GetInt16(cdb, 7))));
|
||
fill_n(buf.begin(), length, 0);
|
||
|
||
// DEVICE SPECIFIC PARAMETER
|
||
if (IsProtected()) {
|
||
buf[3] = 0x80;
|
||
}
|
||
|
||
// Basic Information
|
||
int size = 8;
|
||
|
||
// Add block descriptor if DBD is 0, only if ready
|
||
if ((cdb[1] & 0x08) == 0 && IsReady()) {
|
||
uint64_t disk_blocks = GetBlockCount();
|
||
uint32_t disk_size = GetSectorSizeInBytes();
|
||
|
||
// Check LLBAA for short or long block descriptor
|
||
if ((cdb[1] & 0x10) == 0 || disk_blocks <= 0xFFFFFFFF) {
|
||
// Mode parameter header, block descriptor length
|
||
buf[7] = 0x08;
|
||
|
||
// Short LBA mode parameter block descriptor (number of blocks and block length)
|
||
SetInt32(buf, 8, static_cast<uint32_t>(disk_blocks));
|
||
SetInt32(buf, 12, disk_size);
|
||
|
||
size = 16;
|
||
}
|
||
else {
|
||
// Mode parameter header, LONGLBA
|
||
buf[4] = 0x01;
|
||
|
||
// Mode parameter header, block descriptor length
|
||
buf[7] = 0x10;
|
||
|
||
// Long LBA mode parameter block descriptor (number of blocks and block length)
|
||
SetInt64(buf, 8, disk_blocks);
|
||
SetInt32(buf, 20, disk_size);
|
||
|
||
size = 24;
|
||
}
|
||
}
|
||
|
||
size = AddModePages(cdb, buf, size, length, 65535);
|
||
|
||
SetInt16(buf, 0, size);
|
||
|
||
return size;
|
||
}
|
||
|
||
void Disk::SetUpModePages(map<int, vector<byte>>& pages, int page, bool changeable) const
|
||
{
|
||
// Page code 1 (read-write error recovery)
|
||
if (page == 0x01 || page == 0x3f) {
|
||
AddErrorPage(pages, changeable);
|
||
}
|
||
|
||
// Page code 3 (format device)
|
||
if (page == 0x03 || page == 0x3f) {
|
||
AddFormatPage(pages, changeable);
|
||
}
|
||
|
||
// Page code 4 (rigid drive page)
|
||
if (page == 0x04 || page == 0x3f) {
|
||
AddDrivePage(pages, changeable);
|
||
}
|
||
|
||
// Page code 8 (caching)
|
||
if (page == 0x08 || page == 0x3f) {
|
||
AddCachePage(pages, changeable);
|
||
}
|
||
|
||
// Page (vendor special)
|
||
AddVendorPage(pages, page, changeable);
|
||
}
|
||
|
||
void Disk::AddErrorPage(map<int, vector<byte>>& pages, bool) const
|
||
{
|
||
// Retry count is 0, limit time uses internal default value
|
||
vector<byte> buf(12);
|
||
|
||
// TB, PER, DTE (required for OpenVMS/VAX compatibility, see issue #1117)
|
||
buf[2] = (byte)0x26;
|
||
|
||
pages[1] = buf;
|
||
}
|
||
|
||
void Disk::AddFormatPage(map<int, vector<byte>>& pages, bool changeable) const
|
||
{
|
||
vector<byte> buf(24);
|
||
|
||
// No changeable area
|
||
if (changeable) {
|
||
pages[3] = buf;
|
||
|
||
return;
|
||
}
|
||
|
||
if (IsReady()) {
|
||
// Set the number of tracks in one zone to 8
|
||
buf[0x03] = (byte)0x08;
|
||
|
||
// Set sector/track to 25
|
||
SetInt16(buf, 0x0a, 25);
|
||
|
||
// Set the number of bytes in the physical sector
|
||
SetInt16(buf, 0x0c, 1 << size_shift_count);
|
||
|
||
// Interleave 1
|
||
SetInt16(buf, 0x0e, 1);
|
||
|
||
// Track skew factor 11
|
||
SetInt16(buf, 0x10, 11);
|
||
|
||
// Cylinder skew factor 20
|
||
SetInt16(buf, 0x12, 20);
|
||
}
|
||
|
||
buf[20] = IsRemovable() ? (byte)0x20 : (byte)0x00;
|
||
|
||
// Hard-sectored
|
||
buf[20] |= (byte)0x40;
|
||
|
||
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 = GetBlockCount();
|
||
cylinders >>= 3;
|
||
cylinders /= 25;
|
||
SetInt32(buf, 0x01, static_cast<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;
|
||
}
|
||
|
||
int Disk::Read(const vector<int>&, vector<uint8_t>& buf, uint64_t block)
|
||
{
|
||
assert(block < GetBlockCount());
|
||
|
||
CheckReady();
|
||
|
||
if (!cache->ReadSector(buf, static_cast<uint32_t>(block))) {
|
||
throw scsi_exception(sense_key::MEDIUM_ERROR, asc::READ_FAULT);
|
||
}
|
||
|
||
return GetSectorSizeInBytes();
|
||
}
|
||
|
||
void Disk::Write(const vector<int>&, const vector<uint8_t>& buf, uint64_t block)
|
||
{
|
||
assert(block < GetBlockCount());
|
||
|
||
CheckReady();
|
||
|
||
if (!cache->WriteSector(buf, static_cast<uint32_t>(block))) {
|
||
throw scsi_exception(sense_key::MEDIUM_ERROR, asc::WRITE_FAULT);
|
||
}
|
||
}
|
||
|
||
void Disk::Seek()
|
||
{
|
||
CheckReady();
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::Seek6()
|
||
{
|
||
const auto& [valid, start, blocks] = CheckAndGetStartAndCount(SEEK6);
|
||
if (valid) {
|
||
CheckReady();
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::Seek10()
|
||
{
|
||
const auto& [valid, start, blocks] = CheckAndGetStartAndCount(SEEK10);
|
||
if (valid) {
|
||
CheckReady();
|
||
}
|
||
|
||
EnterStatusPhase();
|
||
}
|
||
|
||
void Disk::ReadCapacity10()
|
||
{
|
||
CheckReady();
|
||
|
||
if (GetBlockCount() == 0) {
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::MEDIUM_NOT_PRESENT);
|
||
}
|
||
|
||
vector<uint8_t>& buf = GetController()->GetBuffer();
|
||
|
||
// Create end of logical block address (blocks-1)
|
||
uint64_t capacity = GetBlockCount() - 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, static_cast<uint32_t>(capacity));
|
||
|
||
// Create block length (1 << size)
|
||
SetInt32(buf, 4, 1 << size_shift_count);
|
||
|
||
GetController()->SetLength(8);
|
||
|
||
EnterDataInPhase();
|
||
}
|
||
|
||
void Disk::ReadCapacity16()
|
||
{
|
||
CheckReady();
|
||
|
||
if (GetBlockCount() == 0) {
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::MEDIUM_NOT_PRESENT);
|
||
}
|
||
|
||
vector<uint8_t>& buf = GetController()->GetBuffer();
|
||
|
||
// Create end of logical block address (blocks-1)
|
||
SetInt64(buf, 0, GetBlockCount() - 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;
|
||
|
||
GetController()->SetLength(14);
|
||
|
||
EnterDataInPhase();
|
||
}
|
||
|
||
void Disk::ReadCapacity16_ReadLong16()
|
||
{
|
||
// The service action determines the actual command
|
||
switch (GetController()->GetCmd(1) & 0x1f) {
|
||
case 0x10:
|
||
ReadCapacity16();
|
||
break;
|
||
|
||
case 0x11:
|
||
ReadWriteLong16();
|
||
break;
|
||
|
||
default:
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
||
break;
|
||
}
|
||
}
|
||
|
||
void Disk::ValidateBlockAddress(access_mode mode) const
|
||
{
|
||
const uint64_t block = mode == RW16 ? GetInt64(GetController()->GetCmd(), 2) : GetInt32(GetController()->GetCmd(), 2);
|
||
|
||
if (block > GetBlockCount()) {
|
||
GetLogger().Trace("Capacity of " + to_string(GetBlockCount()) + " block(s) exceeded: Trying to access block "
|
||
+ to_string(block));
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::LBA_OUT_OF_RANGE);
|
||
}
|
||
}
|
||
|
||
tuple<bool, uint64_t, uint32_t> Disk::CheckAndGetStartAndCount(access_mode mode) const
|
||
{
|
||
uint64_t start;
|
||
uint32_t count;
|
||
|
||
if (mode == RW6 || mode == SEEK6) {
|
||
start = GetInt24(GetController()->GetCmd(), 1);
|
||
|
||
count = GetController()->GetCmd(4);
|
||
if (!count) {
|
||
count= 0x100;
|
||
}
|
||
}
|
||
else {
|
||
start = mode == RW16 ? GetInt64(GetController()->GetCmd(), 2) : GetInt32(GetController()->GetCmd(), 2);
|
||
|
||
if (mode == RW16) {
|
||
count = GetInt32(GetController()->GetCmd(), 10);
|
||
}
|
||
else if (mode != SEEK6 && mode != SEEK10) {
|
||
count = GetInt16(GetController()->GetCmd(), 7);
|
||
}
|
||
else {
|
||
count = 0;
|
||
}
|
||
}
|
||
|
||
stringstream s;
|
||
s << "READ/WRITE/VERIFY/SEEK, start block: $" << setfill('0') << setw(8) << hex << start;
|
||
GetLogger().Trace(s.str() + ", blocks: " + to_string(count));
|
||
|
||
// Check capacity
|
||
if (uint64_t capacity = GetBlockCount(); !capacity || start > capacity || start + count > capacity) {
|
||
GetLogger().Trace("Capacity of " + to_string(capacity) + " block(s) exceeded: Trying to access block "
|
||
+ to_string(start) + ", block count " + to_string(count));
|
||
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::LBA_OUT_OF_RANGE);
|
||
}
|
||
|
||
// Do not process 0 blocks
|
||
if (!count && (mode != SEEK6 && mode != SEEK10)) {
|
||
return tuple(false, start, count);
|
||
}
|
||
|
||
return tuple(true, start, count);
|
||
}
|
||
|
||
uint32_t Disk::CalculateShiftCount(uint32_t size_in_bytes)
|
||
{
|
||
const auto& it = shift_counts.find(size_in_bytes);
|
||
return it != shift_counts.end() ? it->second : 0;
|
||
}
|
||
|
||
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 (const auto& sizes = device_factory.GetSectorSizes(GetType());
|
||
!sizes.empty() && sizes.find(size_in_bytes) == sizes.end()) {
|
||
throw io_exception("Invalid sector size of " + to_string(size_in_bytes) + " byte(s)");
|
||
}
|
||
|
||
size_shift_count = CalculateShiftCount(size_in_bytes);
|
||
assert(size_shift_count);
|
||
}
|
||
|
||
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;
|
||
}
|