mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-20 14:13:09 +00:00
115 lines
2.6 KiB
C++
115 lines
2.6 KiB
C++
/*
|
|
* \brief Block-driver interface
|
|
* \author Christian Helmuth
|
|
* \author Sebastian Sumpf
|
|
* \date 2011-05-23
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011-2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__BLOCK__DRIVER_H_
|
|
#define _INCLUDE__BLOCK__DRIVER_H_
|
|
|
|
#include <base/exception.h>
|
|
#include <base/stdint.h>
|
|
|
|
|
|
namespace Block {
|
|
|
|
/**
|
|
* Interface to be implemented by the device-specific driver code
|
|
*/
|
|
struct Driver
|
|
{
|
|
/**
|
|
* Exceptions
|
|
*/
|
|
class Io_error : public ::Genode::Exception { };
|
|
|
|
/**
|
|
* Request block size for driver and medium
|
|
*/
|
|
virtual Genode::size_t block_size() = 0;
|
|
|
|
/**
|
|
* Request capacity of medium in blocks
|
|
*/
|
|
virtual Genode::size_t block_count() = 0;
|
|
|
|
/**
|
|
* Read from medium
|
|
*
|
|
* \param block_number number of first block to read
|
|
* \param block_count number of blocks to read
|
|
* \param out_buffer output buffer for read request
|
|
*/
|
|
virtual void read(Genode::size_t block_number,
|
|
Genode::size_t block_count,
|
|
char *out_buffer) = 0;
|
|
|
|
/**
|
|
* Write to medium
|
|
*
|
|
* \param block_number number of first block to write
|
|
* \param block_count number of blocks to write
|
|
* \param buffer buffer for write request
|
|
*/
|
|
virtual void write(Genode::size_t block_number,
|
|
Genode::size_t block_count,
|
|
char const *buffer) = 0;
|
|
|
|
/**
|
|
* Read from medium using DMA
|
|
*
|
|
* \param block_number number of first block to read
|
|
* \param block_count number of blocks to read
|
|
* \param phys phyiscal address of read buffer
|
|
*/
|
|
virtual void read_dma(Genode::size_t block_number,
|
|
Genode::size_t block_count,
|
|
Genode::addr_t phys) = 0;
|
|
|
|
/**
|
|
* Write to medium using DMA
|
|
*
|
|
* \param block_number number of first block to write
|
|
* \param block_count number of blocks to write
|
|
* \param phys physical address of write buffer
|
|
*/
|
|
virtual void write_dma(Genode::size_t block_number,
|
|
Genode::size_t block_count,
|
|
Genode::addr_t phys) = 0;
|
|
|
|
/**
|
|
* Check if DMA is enabled for driver
|
|
*
|
|
* \return true if DMA is enabled, false otherwise
|
|
*/
|
|
virtual bool dma_enabled() = 0;
|
|
};
|
|
|
|
|
|
/**
|
|
* Interface for constructing the driver object
|
|
*/
|
|
struct Driver_factory
|
|
{
|
|
/**
|
|
* Construct new driver
|
|
*/
|
|
virtual Driver *create() = 0;
|
|
|
|
/**
|
|
* Destroy driver
|
|
*/
|
|
virtual void destroy(Driver *driver) = 0;
|
|
};
|
|
}
|
|
|
|
#endif /* _BLOCK__DRIVER_H_ */
|