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131 lines
3.5 KiB
C++
131 lines
3.5 KiB
C++
/*
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* \brief Server::Entrypoint based NIC session component
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* \author Norman Feske
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* \author Sebastian Sumpf
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* \date 2015-06-22
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*/
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/*
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* Copyright (C) 2015-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _INCLUDE__NIC__COMPONENT_H_
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#define _INCLUDE__NIC__COMPONENT_H_
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#include <base/attached_ram_dataspace.h>
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#include <base/entrypoint.h>
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#include <nic/packet_allocator.h>
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#include <nic_session/rpc_object.h>
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namespace Nic {
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class Communication_buffers;
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class Session_component;
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}
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class Nic::Communication_buffers
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{
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protected:
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Nic::Packet_allocator _rx_packet_alloc;
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Genode::Attached_ram_dataspace _tx_ds, _rx_ds;
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Communication_buffers(Genode::Allocator &rx_block_md_alloc,
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Genode::Ram_session &ram_session,
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Genode::Region_map ®ion_map,
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Genode::size_t tx_size,
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Genode::size_t rx_size)
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:
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_rx_packet_alloc(&rx_block_md_alloc),
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_tx_ds(ram_session, region_map, tx_size),
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_rx_ds(ram_session, region_map, rx_size)
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{ }
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};
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class Nic::Session_component : Communication_buffers, public Session_rpc_object
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{
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protected:
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Genode::Entrypoint &_ep;
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Genode::Signal_context_capability _link_state_sigh;
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/**
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* Signal link-state change to client
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*/
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void _link_state_changed()
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{
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if (_link_state_sigh.valid())
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Genode::Signal_transmitter(_link_state_sigh).submit();
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}
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/**
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* Sub-classes must implement this function, it is called upon all
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* packet-stream signals.
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*/
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virtual void _handle_packet_stream() = 0;
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void _dispatch() { _handle_packet_stream(); }
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Genode::Signal_handler<Session_component> _packet_stream_dispatcher {
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_ep, *this, &Session_component::_dispatch };
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public:
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/**
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* Constructor
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*
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* \param tx_buf_size buffer size for tx channel
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* \param rx_buf_size buffer size for rx channel
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* \param rx_block_md_alloc backing store of the meta data of the
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* rx block allocator
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* \param ram_session RAM session to allocate tx and rx buffers
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* \param ep entry point used for packet stream
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* channels
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*/
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Session_component(Genode::size_t const tx_buf_size,
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Genode::size_t const rx_buf_size,
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Genode::Allocator &rx_block_md_alloc,
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Genode::Ram_session &ram_session,
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Genode::Region_map ®ion_map,
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Genode::Entrypoint &ep)
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:
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Communication_buffers(rx_block_md_alloc, ram_session, region_map,
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tx_buf_size, rx_buf_size),
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Session_rpc_object(region_map,
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_tx_ds.cap(),
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_rx_ds.cap(),
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&_rx_packet_alloc, ep.rpc_ep()),
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_ep(ep)
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{
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/* install data-flow signal handlers for both packet streams */
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_tx.sigh_ready_to_ack(_packet_stream_dispatcher);
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_tx.sigh_packet_avail(_packet_stream_dispatcher);
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_rx.sigh_ready_to_submit(_packet_stream_dispatcher);
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_rx.sigh_ack_avail(_packet_stream_dispatcher);
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}
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void link_state_sigh(Genode::Signal_context_capability sigh)
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{
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_link_state_sigh = sigh;
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}
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/**
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* Return the current link state
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*/
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virtual bool link_state() = 0;
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/**
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* Return the MAC address of the device
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*/
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virtual Mac_address mac_address() = 0;
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};
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#endif /* _INCLUDE__NIC__COMPONENT_H_ */
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