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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/Devices/BlockDevice.h>
namespace Kernel {
AsyncBlockDeviceRequest::AsyncBlockDeviceRequest(Device& block_device, RequestType request_type, u32 block_index, u32 block_count, const UserOrKernelBuffer& buffer, size_t buffer_size)
: AsyncDeviceRequest(block_device)
, m_block_device(static_cast<BlockDevice&>(block_device))
, m_request_type(request_type)
, m_block_index(block_index)
, m_block_count(block_count)
, m_buffer(buffer)
, m_buffer_size(buffer_size)
{
}
void AsyncBlockDeviceRequest::start()
{
m_block_device.start_request(*this);
}
BlockDevice::~BlockDevice()
{
}
bool BlockDevice::read_block(unsigned index, UserOrKernelBuffer& buffer)
{
auto read_request = make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Read, index, 1, buffer, 512);
switch (read_request->wait().request_result()) {
case AsyncDeviceRequest::Success:
return true;
case AsyncDeviceRequest::Failure:
dbgln("BlockDevice::read_block({}) IO error", index);
break;
case AsyncDeviceRequest::MemoryFault:
dbgln("BlockDevice::read_block({}) EFAULT", index);
break;
case AsyncDeviceRequest::Cancelled:
dbgln("BlockDevice::read_block({}) cancelled", index);
break;
default:
ASSERT_NOT_REACHED();
}
return false;
}
bool BlockDevice::write_block(unsigned index, const UserOrKernelBuffer& buffer)
{
auto write_request = make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Write, index, 1, buffer, 512);
switch (write_request->wait().request_result()) {
case AsyncDeviceRequest::Success:
return true;
case AsyncDeviceRequest::Failure:
dbgln("BlockDevice::write_block({}) IO error", index);
break;
case AsyncDeviceRequest::MemoryFault:
dbgln("BlockDevice::write_block({}) EFAULT", index);
break;
case AsyncDeviceRequest::Cancelled:
dbgln("BlockDevice::write_block({}) cancelled", index);
break;
default:
ASSERT_NOT_REACHED();
}
return false;
}
}
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