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Kernel/USB: Add a crude USB MassStorage driver :^)
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Kernel/Bus/USB/Drivers/MassStorage/MassStorageDriver.cpp
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184
Kernel/Bus/USB/Drivers/MassStorage/MassStorageDriver.cpp
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/*
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* Copyright (c) 2023, Leon Albrecht <leon.a@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Find.h>
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#include <Kernel/Bus/USB/Drivers/MassStorage/MassStorageDriver.h>
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#include <Kernel/Bus/USB/USBClasses.h>
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#include <Kernel/Bus/USB/USBEndpoint.h>
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#include <Kernel/Bus/USB/USBRequest.h>
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#include <Kernel/Devices/DeviceManagement.h>
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#include <Kernel/Devices/Storage/StorageManagement.h>
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#include <Kernel/Devices/Storage/USB/BulkSCSIInterface.h>
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#include <Kernel/Devices/Storage/USB/Codes.h>
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#include <Kernel/Devices/Storage/USB/SCSIComands.h>
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namespace Kernel::USB {
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using namespace MassStorage;
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USB_DEVICE_DRIVER(MassStorageDriver);
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void MassStorageDriver::init()
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{
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auto driver = MUST(adopt_nonnull_lock_ref_or_enomem(new MassStorageDriver()));
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USBManagement::the().register_driver(driver);
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}
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ErrorOr<void> MassStorageDriver::checkout_interface(USB::Device& device, USBInterface const& interface)
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{
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auto const& descriptor = interface.descriptor();
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if (descriptor.interface_class_code != USB_CLASS_MASS_STORAGE)
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return ENOTSUP;
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dmesgln("USB MassStorage Interface for device {}:{} found:", device.device_descriptor().vendor_id, device.device_descriptor().product_id);
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dmesgln(" Subclass: {} [{:#02x}]", MassStorage::subclass_string((SubclassCode)descriptor.interface_sub_class_code), descriptor.interface_sub_class_code);
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dmesgln(" Protocol: {} [{:#02x}]", MassStorage::transport_protocol_string((TransportProtocol)descriptor.interface_protocol), descriptor.interface_protocol);
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// FIXME: Find a nice way of handling multiple device subclasses and protocols
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if (descriptor.interface_protocol == to_underlying(TransportProtocol::BBB))
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return initialise_bulk_only_device(device, interface);
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return ENOTSUP;
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}
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ErrorOr<void> MassStorageDriver::probe(USB::Device& device)
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{
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// USB massbulk Table 4.1:
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if (device.device_descriptor().device_class != USB_CLASS_DEVICE
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|| device.device_descriptor().device_sub_class != 0x00
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|| device.device_descriptor().device_protocol != 0x00)
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return ENOTSUP;
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for (auto const& config : device.configurations()) {
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// FIXME: There might be multiple MassStorage configs present,
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// figure out how to decide which one to take,
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// although that's very unlikely
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bool has_accepted_an_interface = false;
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for (auto const& interface : config.interfaces()) {
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// FIXME: Handle multiple interfaces
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// Interface may coexist at the same time,
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// but having multiple handles on the same data storage seems like a bad idea,
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// so:
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// FIXME: Choose the best supported interface
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// UAS for example is supposed to be better than BBB, but BBB will always
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// be the first listed interface of them, when both are supported
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auto result = checkout_interface(device, interface);
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if (result.is_error())
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continue;
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has_accepted_an_interface = true;
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}
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if (has_accepted_an_interface)
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return {};
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}
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return ENOTSUP;
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}
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ErrorOr<void> MassStorageDriver::initialise_bulk_only_device(USB::Device& device, USBInterface const& interface)
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{
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auto const& descriptor = interface.descriptor();
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auto const& configuration = interface.configuration();
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if (descriptor.interface_sub_class_code != to_underlying(MassStorage::SubclassCode::SCSI_transparent))
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return ENOTSUP;
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TRY(device.control_transfer(
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USB_REQUEST_RECIPIENT_DEVICE | USB_REQUEST_TYPE_STANDARD | USB_REQUEST_TRANSFER_DIRECTION_HOST_TO_DEVICE,
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USB_REQUEST_SET_CONFIGURATION, configuration.configuration_id(), 0, 0, nullptr));
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u8 max_luns;
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TRY(device.control_transfer(
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USB_REQUEST_TYPE_CLASS | USB_REQUEST_RECIPIENT_INTERFACE | USB_REQUEST_TRANSFER_DIRECTION_DEVICE_TO_HOST,
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to_underlying(MassStorage::RequestCodes::GetMaxLun), 0, interface.descriptor().interface_id, 1, &max_luns));
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// FIXME: Devices that do not support multiple LUNs may STALL this command
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// FIXME: Support multiple LUNs
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if (max_luns != 0)
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dmesgln("SCSI/BBB: WARNING: USB Mass Storage Device supports multiple LUNs ({}) only targetting first LUN", max_luns);
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u8 in_pipe_address = 0xff;
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u8 in_max_packet_size;
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u8 out_pipe_address = 0xff;
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u8 out_max_packet_size;
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if (interface.descriptor().number_of_endpoints < 2) {
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dmesgln("SCSI/BBB: Interface does not provide enough endpoints for advertised Bulk-only transfer protocol; Rejecting");
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return ENOTSUP;
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}
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for (auto const& endpoint : interface.endpoints()) {
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if (endpoint.endpoint_attributes_bitmap != USBEndpoint::ENDPOINT_ATTRIBUTES_TRANSFER_TYPE_BULK)
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continue;
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// The upper bit of the Endpoint address is set to 1, iff it is the Bulk-In Endpoint
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if (endpoint.endpoint_address & 0x80) {
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in_pipe_address = endpoint.endpoint_address & 0b1111;
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in_max_packet_size = endpoint.max_packet_size;
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} else {
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out_pipe_address = endpoint.endpoint_address & 0b1111;
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out_max_packet_size = endpoint.max_packet_size;
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}
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}
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if (in_pipe_address == 0xff || out_pipe_address == 0xff) {
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dmesgln("SCSI/BBB: Interface did not advertise two Bulk Endpoints; Rejecting");
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return ENOTSUP;
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}
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auto in_pipe = TRY(BulkInPipe::create(device.controller(), in_pipe_address, in_max_packet_size, device.address()));
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auto out_pipe = TRY(BulkOutPipe::create(device.controller(), out_pipe_address, out_max_packet_size, device.address()));
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CommandBlockWrapper command_block {};
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command_block.set_command(SCSI::ReadCapacity10 {});
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command_block.transfer_length = sizeof(SCSI::ReadCapacity10Parameters);
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command_block.direction = CBWDirection::DataIn;
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TRY(out_pipe->submit_bulk_out_transfer(31, &command_block));
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SCSI::ReadCapacity10Parameters capacity;
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TRY(in_pipe->submit_bulk_in_transfer(sizeof(capacity), &capacity));
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// FIXME: Handle Stalling
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CommandStatusWrapper status;
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TRY(in_pipe->submit_bulk_in_transfer(sizeof(status), &status));
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if (status.status != CSWStatus::Passed) {
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dmesgln("SCSI/BBB: Failed to query USB Drive capacity; Rejecting");
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return ENOTSUP;
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}
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dmesgln(" Block Size: {}B", capacity.block_size);
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dmesgln(" Block Count: {}", capacity.block_count);
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dmesgln(" Total Size: {}MiB", (u64)capacity.block_size * capacity.block_count / MiB);
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StorageDevice::LUNAddress lun = {
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device.controller().storage_controller_id(),
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device.address(),
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// FIXME: Again, support multiple LUNs per device
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0
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};
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auto bulk_scsi_interface = TRY(DeviceManagement::try_create_device<BulkSCSIInterface>(
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lun,
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device.address(), // FIXME: Figure out a better ID to put here
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capacity.block_size,
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capacity.block_count,
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device,
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move(in_pipe),
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move(out_pipe)));
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m_interfaces.append(bulk_scsi_interface);
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StorageManagement::the().add_device(bulk_scsi_interface);
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return {};
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}
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void MassStorageDriver::detach(USB::Device& device)
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{
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auto&& interface = AK::find_if(m_interfaces.begin(), m_interfaces.end(), [&device](auto& interface) { return &interface.device() == &device; });
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StorageManagement::the().remove_device(*interface);
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m_interfaces.remove(*interface);
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}
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}
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38
Kernel/Bus/USB/Drivers/MassStorage/MassStorageDriver.h
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38
Kernel/Bus/USB/Drivers/MassStorage/MassStorageDriver.h
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/*
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* Copyright (c) 2023, Leon Albrecht <leon.a@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <Kernel/Bus/USB/Drivers/USBDriver.h>
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#include <Kernel/Bus/USB/USBInterface.h>
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#include <Kernel/Bus/USB/USBManagement.h>
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#include <Kernel/Devices/Storage/USB/BulkSCSIInterface.h>
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namespace Kernel::USB {
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class MassStorageDriver final : public Driver {
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public:
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MassStorageDriver()
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: Driver("USB MassStorage"sv)
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{
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}
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static void init();
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virtual ~MassStorageDriver() override = default;
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virtual ErrorOr<void> probe(USB::Device&) override;
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virtual void detach(USB::Device&) override;
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private:
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BulkSCSIInterface::List m_interfaces;
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ErrorOr<void> checkout_interface(USB::Device&, USBInterface const&);
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ErrorOr<void> initialise_bulk_only_device(USB::Device&, USBInterface const&);
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};
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}
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namespace Kernel::USB {
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// https://www.usb.org/defined-class-codes
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static constexpr u8 USB_CLASS_DEVICE = 0x00;
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static constexpr u8 USB_CLASS_AUDIO = 0x01;
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static constexpr u8 USB_CLASS_COMMUNICATIONS_AND_CDC_CONTROL = 0x02;
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static constexpr u8 USB_CLASS_HID = 0x03;
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@ -31,6 +31,7 @@ set(KERNEL_SOURCES
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Bus/PCI/DeviceIdentifier.cpp
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Bus/USB/UHCI/UHCIController.cpp
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Bus/USB/UHCI/UHCIRootHub.cpp
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Bus/USB/Drivers/MassStorage/MassStorageDriver.cpp
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Bus/USB/USBConfiguration.cpp
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Bus/USB/USBController.cpp
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Bus/USB/USBDevice.cpp
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@ -120,6 +121,7 @@ set(KERNEL_SOURCES
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Devices/Storage/SD/PCISDHostController.cpp
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Devices/Storage/SD/SDHostController.cpp
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Devices/Storage/SD/SDMemoryCard.cpp
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Devices/Storage/USB/BulkSCSIInterface.cpp
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Devices/Storage/DiskPartition.cpp
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Devices/Storage/StorageController.cpp
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Devices/Storage/StorageDevice.cpp
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125
Kernel/Devices/Storage/USB/BulkSCSIInterface.cpp
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125
Kernel/Devices/Storage/USB/BulkSCSIInterface.cpp
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/*
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* Copyright (c) 2023, Leon Albrecht <leon.a@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Bus/USB/USBController.h>
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#include <Kernel/Devices/Storage/USB/BulkSCSIInterface.h>
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#include <Kernel/Devices/Storage/USB/SCSIComands.h>
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namespace Kernel::USB {
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BulkSCSIInterface::BulkSCSIInterface(LUNAddress logical_unit_number_address, u32 hardware_relative_controller_id, size_t sector_size, u64 max_addressable_block, USB::Device& device, NonnullOwnPtr<BulkInPipe> in_pipe, NonnullOwnPtr<BulkOutPipe> out_pipe)
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: StorageDevice(logical_unit_number_address, hardware_relative_controller_id, sector_size, max_addressable_block)
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, m_device(device)
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, m_in_pipe(move(in_pipe))
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, m_out_pipe(move(out_pipe))
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{
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}
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void BulkSCSIInterface::start_request(AsyncBlockDeviceRequest& request)
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{
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if (request.request_type() == AsyncBlockDeviceRequest::RequestType::Read) {
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if (do_read(request.block_index(), request.block_count(), request.buffer(), request.buffer_size()).is_error()) {
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request.complete(AsyncDeviceRequest::RequestResult::Failure);
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} else {
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request.complete(AsyncDeviceRequest::RequestResult::Success);
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}
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} else {
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if (do_write(request.block_index(), request.block_count(), request.buffer(), request.buffer_size()).is_error()) {
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request.complete(AsyncDeviceRequest::RequestResult::Failure);
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} else {
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request.complete(AsyncDeviceRequest::RequestResult::Success);
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}
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}
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}
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ErrorOr<void> BulkSCSIInterface::do_read(u32 block_index, u32 block_count, UserOrKernelBuffer& buffer, size_t)
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{
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// FIXME: Error Handling and proper device reset on exit
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CommandBlockWrapper command;
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SCSI::Read10 read_command;
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u32 block_index_to_read = block_index;
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u32 blocks_read = 0;
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UserOrKernelBuffer destination_buffer = buffer;
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while (blocks_read < block_count) {
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read_command.logical_block_address = block_index_to_read;
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u16 transfer_length_bytes = min((block_count - blocks_read) * block_size(), AK::NumericLimits<u16>::max());
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read_command.transfer_length = transfer_length_bytes / block_size();
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command.transfer_length = transfer_length_bytes;
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command.direction = CBWDirection::DataIn;
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command.set_command(read_command);
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TRY(m_out_pipe->submit_bulk_out_transfer(sizeof(command), &command));
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TRY(m_in_pipe->submit_bulk_in_transfer(transfer_length_bytes, destination_buffer));
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CommandStatusWrapper status;
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TRY(m_in_pipe->submit_bulk_in_transfer(sizeof(status), &status));
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if (status.status != CSWStatus::Passed) {
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// FIXME: Actually handle the error
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// See usbmassbulk 5.3, 6.4 and 6.5
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dmesgln("SCSI/BBB: Read failed with code {}", to_underlying(status.status));
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return EIO;
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}
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u32 bytes_transferred = transfer_length_bytes - status.data_residue;
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u32 blocks_read_in_transfer = bytes_transferred / block_size();
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blocks_read += blocks_read_in_transfer;
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block_index_to_read += blocks_read_in_transfer;
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}
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return {};
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}
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ErrorOr<void> BulkSCSIInterface::do_write(u32 block_index, u32 block_count, UserOrKernelBuffer& buffer, size_t)
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{
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// FIXME: Error Handling and proper device reset on exit
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CommandBlockWrapper command;
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SCSI::Write10 read_command;
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u32 block_index_to_read = block_index;
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u32 blocks_read = 0;
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UserOrKernelBuffer destination_buffer = buffer;
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while (blocks_read < block_count) {
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read_command.logical_block_address = block_index_to_read;
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u16 transfer_length_bytes = min((block_count - blocks_read) * block_size(), AK::NumericLimits<u16>::max());
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read_command.transfer_length = transfer_length_bytes / block_size();
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command.transfer_length = transfer_length_bytes;
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command.direction = CBWDirection::DataOut;
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command.set_command(read_command);
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TRY(m_out_pipe->submit_bulk_out_transfer(sizeof(command), &command));
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TRY(m_out_pipe->submit_bulk_out_transfer(transfer_length_bytes, destination_buffer));
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CommandStatusWrapper status;
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TRY(m_in_pipe->submit_bulk_in_transfer(sizeof(status), &status));
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if (status.status != CSWStatus::Passed) {
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// FIXME: Actually handle the error
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// See usbmassbulk 5.3, 6.4 and 6.5
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dmesgln("SCSI/BBB: Write failed with code {}", to_underlying(status.status));
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return EIO;
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}
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u32 bytes_transferred = transfer_length_bytes - status.data_residue;
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u32 blocks_read_in_transfer = bytes_transferred / block_size();
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blocks_read += blocks_read_in_transfer;
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block_index_to_read += blocks_read_in_transfer;
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}
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return {};
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}
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}
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85
Kernel/Devices/Storage/USB/BulkSCSIInterface.h
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85
Kernel/Devices/Storage/USB/BulkSCSIInterface.h
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/*
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* Copyright (c) 2023, Leon Albrecht <leon.a@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/IntrusiveList.h>
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#include <Kernel/Bus/USB/USBDevice.h>
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#include <Kernel/Bus/USB/USBPipe.h>
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#include <Kernel/Devices/Storage/StorageDevice.h>
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namespace Kernel::USB {
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enum class CBWDirection : u8 {
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DataOut = 0,
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DataIn = 1
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};
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struct CommandBlockWrapper {
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LittleEndian<u32> signature { 0x43425355 };
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LittleEndian<u32> tag { 0 };
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LittleEndian<u32> transfer_length { 0 };
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union {
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u8 flags { 0 };
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struct {
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u8 flag_reserved : 6;
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u8 flag_obsolete : 1;
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CBWDirection direction : 1;
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};
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};
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u8 lun { 0 }; // only 4 bits
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u8 command_length { 0 }; // 5 bits, range 1-16
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u8 command_block[16] { 0 };
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template<typename T>
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requires(sizeof(T) <= 16)
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void set_command(T const& command)
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{
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command_length = sizeof(command);
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memcpy(&command_block, &command, sizeof(command));
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}
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};
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static_assert(AssertSize<CommandBlockWrapper, 31>());
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enum class CSWStatus : u8 {
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Passed = 0x00,
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Failed = 0x01,
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PhaseError = 0x02
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};
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struct CommandStatusWrapper {
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LittleEndian<u32> signature;
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LittleEndian<u32> tag;
|
||||
LittleEndian<u32> data_residue;
|
||||
CSWStatus status;
|
||||
};
|
||||
static_assert(AssertSize<CommandStatusWrapper, 13>());
|
||||
|
||||
class BulkSCSIInterface : public StorageDevice {
|
||||
// https://www.usb.org/sites/default/files/usbmassbulk_10.pdf
|
||||
public:
|
||||
BulkSCSIInterface(LUNAddress logical_unit_number_address, u32 hardware_relative_controller_id, size_t sector_size, u64 max_addressable_block, USB::Device& device, NonnullOwnPtr<BulkInPipe> in_pipe, NonnullOwnPtr<BulkOutPipe> out_pipe);
|
||||
|
||||
USB::Device const& device() const { return m_device; }
|
||||
|
||||
virtual void start_request(AsyncBlockDeviceRequest&) override;
|
||||
virtual CommandSet command_set() const override { return CommandSet::SCSI; }
|
||||
|
||||
private:
|
||||
USB::Device& m_device;
|
||||
NonnullOwnPtr<BulkInPipe> m_in_pipe;
|
||||
NonnullOwnPtr<BulkOutPipe> m_out_pipe;
|
||||
|
||||
ErrorOr<void> do_read(u32 block_index, u32 block_count, UserOrKernelBuffer& buffer, size_t buffer_size);
|
||||
ErrorOr<void> do_write(u32 block_index, u32 block_count, UserOrKernelBuffer& buffer, size_t buffer_size);
|
||||
|
||||
IntrusiveListNode<BulkSCSIInterface, NonnullLockRefPtr<BulkSCSIInterface>> m_list_node;
|
||||
|
||||
public:
|
||||
using List = IntrusiveList<&BulkSCSIInterface::m_list_node>;
|
||||
};
|
||||
|
||||
}
|
108
Kernel/Devices/Storage/USB/Codes.h
Normal file
108
Kernel/Devices/Storage/USB/Codes.h
Normal file
|
@ -0,0 +1,108 @@
|
|||
/*
|
||||
* Copyright (c) 2023, Leon Albrecht <leon.a@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <AK/StringView.h>
|
||||
#include <AK/Types.h>
|
||||
|
||||
namespace Kernel::USB::MassStorage {
|
||||
// https://www.usb.org/sites/default/files/Mass_Storage_Specification_Overview_v1.4_2-19-2010.pdf
|
||||
// 2
|
||||
enum class SubclassCode : u8 {
|
||||
NotReported = 0x00,
|
||||
RBC = 0x01,
|
||||
MMC5 = 0x02, // ATAPI
|
||||
Obsolete_QIC157 = 0x03,
|
||||
UFI = 0x04, // Floppy
|
||||
Obsolete_SFF8070i = 0x05,
|
||||
SCSI_transparent = 0x06,
|
||||
LSD_FS = 0x07,
|
||||
IEEE1667 = 0x08,
|
||||
// Reserved: 0x09 - 0xFE
|
||||
VendorSpecific = 0xFF
|
||||
};
|
||||
|
||||
constexpr StringView subclass_string(SubclassCode code)
|
||||
{
|
||||
switch (code) {
|
||||
case SubclassCode::NotReported:
|
||||
return "Not Reported"sv;
|
||||
case SubclassCode::RBC:
|
||||
return "RBC"sv;
|
||||
case SubclassCode::MMC5:
|
||||
return "MMC-5 (ATAPI)"sv;
|
||||
case SubclassCode::Obsolete_QIC157:
|
||||
return "QIC157 (Obsolete)"sv;
|
||||
case SubclassCode::UFI:
|
||||
return "UFI"sv;
|
||||
case SubclassCode::Obsolete_SFF8070i:
|
||||
return "SFF8070i (Obsolete)"sv;
|
||||
case SubclassCode::SCSI_transparent:
|
||||
return "SCSI-transparent"sv;
|
||||
case SubclassCode::LSD_FS:
|
||||
return "LSD FS"sv;
|
||||
case SubclassCode::IEEE1667:
|
||||
return "IEEE1667"sv;
|
||||
case SubclassCode::VendorSpecific:
|
||||
return "Vendor Specific"sv;
|
||||
}
|
||||
|
||||
return "Reserved"sv;
|
||||
}
|
||||
|
||||
// 3
|
||||
enum class TransportProtocol : u8 {
|
||||
CBI_completion_interrupt = 0x00, // Control/Bulk/Interrupt
|
||||
CBI_no_completion_interrupt = 0x01, // Control/Bulk/Interrupt
|
||||
Obsolete = 0x02,
|
||||
// Reserved: 0x03 - 0x4F
|
||||
BBB = 0x50, // Bulk-only
|
||||
// Reserved: 0x51 - 0x61
|
||||
UAS = 0x62,
|
||||
// Reserved: 0x63 - 0xFE
|
||||
VendorSpecific = 0xFF
|
||||
};
|
||||
|
||||
constexpr StringView transport_protocol_string(TransportProtocol protocol)
|
||||
{
|
||||
switch (protocol) {
|
||||
case TransportProtocol::CBI_completion_interrupt:
|
||||
return "Control/Bulk/Interrupt with completion interrupt"sv;
|
||||
case TransportProtocol::CBI_no_completion_interrupt:
|
||||
return "Control/Bulk/Interrupt without completion interrupt"sv;
|
||||
case TransportProtocol::Obsolete:
|
||||
return "Obsolete"sv;
|
||||
case TransportProtocol::BBB:
|
||||
return "Bulk only"sv;
|
||||
case TransportProtocol::UAS:
|
||||
return "UAS"sv;
|
||||
case TransportProtocol::VendorSpecific:
|
||||
return "Vendor Specific"sv;
|
||||
}
|
||||
|
||||
return "Reserved"sv;
|
||||
}
|
||||
|
||||
// 4
|
||||
enum class RequestCodes : u8 {
|
||||
ADSC = 0x00, // Accept Device Specific Command (CBI) - also alias USB-request 00h Get Status
|
||||
// Reserved/alias USB-bRequest: 0x01 - 0x0D
|
||||
// Reserved: 0x0E - 0XFB
|
||||
GetRequest = 0xFC,
|
||||
PutRequest = 0xFD,
|
||||
GetMaxLun = 0xFE, // GML (BBB)
|
||||
BulkOnlyMassStorageReset = 0xFF // BOMSR (BBB)
|
||||
};
|
||||
|
||||
// 5
|
||||
enum class ClassSpecificDescriptorCodes : u8 {
|
||||
// Undefined by Mass Storage: 0x00 - 0x23
|
||||
PipeUsageClassSpecific = 0x24 // UAS
|
||||
// Undefined by Mass Storage: 0x25 - 0xFF
|
||||
};
|
||||
|
||||
}
|
72
Kernel/Devices/Storage/USB/SCSIComands.h
Normal file
72
Kernel/Devices/Storage/USB/SCSIComands.h
Normal file
|
@ -0,0 +1,72 @@
|
|||
/*
|
||||
* Copyright (c) 2023, Leon Albrecht <leon.a@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <AK/Endian.h>
|
||||
#include <AK/StdLibExtraDetails.h>
|
||||
#include <AK/Types.h>
|
||||
|
||||
// https://www.seagate.com/files/staticfiles/support/docs/manual/Interface%20manuals/100293068j.pdf
|
||||
|
||||
namespace Kernel::SCSI {
|
||||
// 3.22.1
|
||||
struct ReadCapacity10 {
|
||||
u8 opcode { 0x25 };
|
||||
u8 reserved1 { 0 };
|
||||
BigEndian<u32> oboslete_logical_block_address { 0 };
|
||||
u16 reserved2 { 0 };
|
||||
u8 reserved3 { 0 };
|
||||
u8 control { 0 };
|
||||
};
|
||||
static_assert(AssertSize<ReadCapacity10, 10>());
|
||||
// 3.22.2
|
||||
struct ReadCapacity10Parameters {
|
||||
BigEndian<u32> block_count;
|
||||
BigEndian<u32> block_size;
|
||||
};
|
||||
static_assert(AssertSize<ReadCapacity10Parameters, 8>());
|
||||
|
||||
// 3.16
|
||||
struct Read10 {
|
||||
u8 operation_code { 0x28 };
|
||||
union {
|
||||
u8 settings { 0 };
|
||||
struct {
|
||||
u8 obsolete : 2;
|
||||
u8 rarc : 1;
|
||||
u8 fua : 1;
|
||||
u8 dpo : 1;
|
||||
u8 rdprotect : 3;
|
||||
};
|
||||
};
|
||||
BigEndian<u32> logical_block_address;
|
||||
u8 group_number { 0 }; // only bottom 5 bits
|
||||
BigEndian<u16> transfer_length;
|
||||
u8 control { 0 };
|
||||
};
|
||||
static_assert(AssertSize<Read10, 10>());
|
||||
|
||||
// 3.60
|
||||
struct Write10 {
|
||||
u8 operation_code { 0x2A };
|
||||
union {
|
||||
u8 settings { 0 };
|
||||
struct {
|
||||
u8 obsolete : 2;
|
||||
u8 reserved : 1;
|
||||
u8 fua : 1;
|
||||
u8 dpo : 1;
|
||||
u8 wrprotect : 3;
|
||||
};
|
||||
};
|
||||
BigEndian<u32> logical_block_address;
|
||||
u8 group_number { 0 }; // only bottom 5 bits
|
||||
BigEndian<u16> transfer_length;
|
||||
u8 control { 0 };
|
||||
};
|
||||
static_assert(AssertSize<Read10, 10>());
|
||||
}
|
Loading…
Reference in a new issue