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CLK/Storage/MassStorage/SCSI/Target.cpp

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//
// Target.cpp
// Clock Signal
//
// Created by Thomas Harte on 17/08/2019.
// Copyright © 2019 Thomas Harte. All rights reserved.
//
#include "Target.hpp"
using namespace SCSI::Target;
CommandState::CommandState(const std::vector<uint8_t> &data, const std::vector<uint8_t> &received) : data_(data), received_(received) {}
uint32_t CommandState::address() const {
switch(data_.size()) {
default: return 0;
case 6:
return
(uint32_t(data_[1]) << 16) |
(uint32_t(data_[2]) << 8) |
uint32_t(data_[3]);
case 10:
case 12:
return
(uint32_t(data_[1]) << 24) |
(uint32_t(data_[2]) << 16) |
(uint32_t(data_[3]) << 8) |
uint32_t(data_[4]);
}
}
uint16_t CommandState::number_of_blocks() const {
switch(data_.size()) {
default: return 0;
case 6:
return uint16_t(data_[4]);
case 10:
return uint16_t((data_[7] << 8) | data_[8]);
}
}
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CommandState::ReadWrite CommandState::read_write_specs() const {
ReadWrite specs;
specs.address = address();
specs.number_of_blocks = number_of_blocks();
if(!specs.number_of_blocks && (data_.size() == 6)) {
specs.number_of_blocks = 256;
}
return specs;
}
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size_t CommandState::allocated_inquiry_bytes() const {
// 0 means 256 bytes allocated for inquiry.
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return size_t(((data_[4] - 1) & 0xff) + 1);
}
CommandState::ModeSense CommandState::mode_sense_specs() const {
ModeSense specs;
specs.exclude_block_descriptors = (data_[1] & 0x08);
specs.page_control_values = ModeSense::PageControlValues(data_[2] >> 5);
specs.page_code = data_[2] & 0x3f;
specs.subpage_code = data_[3];
specs.allocated_bytes = number_of_blocks();
return specs;
}
CommandState::ReadBuffer CommandState::read_buffer_specs() const {
ReadBuffer specs;
specs.mode = ReadBuffer::Mode(data_[1]&7);
if(specs.mode > ReadBuffer::Mode::Reserved) specs.mode = ReadBuffer::Mode::Reserved;
specs.buffer_id = data_[2];
specs.buffer_offset = uint32_t((data_[3] << 16) | (data_[4] << 8) | data_[5]);
specs.buffer_length = uint32_t((data_[6] << 16) | (data_[7] << 8) | data_[8]);
return specs;
}
CommandState::ModeSelect CommandState::mode_select_specs() const {
ModeSelect specs;
specs.parameter_list_length = number_of_blocks();
specs.content_is_vendor_specific = !(data_[1] & 0x10);
specs.revert_to_default = (data_[1] & 0x02);
specs.save_pages = (data_[1] & 0x01);
return specs;
}