173 lines
3.6 KiB
C++
173 lines
3.6 KiB
C++
/*
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* \brief NIC driver based on iPXE
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* \author Christian Helmuth
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* \author Sebastian Sumpf
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* \date 2011-11-17
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*/
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/*
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* Copyright (C) 2011-2017 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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/* Genode */
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#include <base/component.h>
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#include <base/env.h>
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#include <base/heap.h>
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#include <base/log.h>
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#include <nic/component.h>
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#include <nic/root.h>
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#include <dde_ipxe/support.h>
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#include <dde_ipxe/nic.h>
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using namespace Genode;
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class Ipxe_session_component : public Nic::Session_component
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{
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public:
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static Ipxe_session_component *instance;
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private:
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Nic::Mac_address _mac_addr;
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static void _rx_callback(unsigned if_index,
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const char *packet,
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unsigned packet_len)
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{
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if (instance)
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instance->_receive(packet, packet_len);
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}
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static void _link_callback()
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{
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if (instance)
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instance->_link_state_changed();
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}
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bool _send()
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{
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using namespace Genode;
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if (!_tx.sink()->ready_to_ack())
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return false;
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if (!_tx.sink()->packet_avail())
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return false;
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Packet_descriptor packet = _tx.sink()->get_packet();
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if (!packet.size()) {
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Genode::warning("Invalid tx packet");
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return true;
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}
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if (link_state()) {
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if (dde_ipxe_nic_tx(1, _tx.sink()->packet_content(packet), packet.size()))
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Genode::warning("Sending packet failed!");
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}
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_tx.sink()->acknowledge_packet(packet);
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return true;
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}
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void _receive(const char *packet, unsigned packet_len)
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{
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_handle_packet_stream();
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if (!_rx.source()->ready_to_submit())
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return;
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try {
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Nic::Packet_descriptor p = _rx.source()->alloc_packet(packet_len);
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Genode::memcpy(_rx.source()->packet_content(p), packet, packet_len);
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_rx.source()->submit_packet(p);
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} catch (...) {
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Genode::warning(__func__, ": failed to process received packet");
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}
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}
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void _handle_packet_stream() override
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{
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while (_rx.source()->ack_avail())
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_rx.source()->release_packet(_rx.source()->get_acked_packet());
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while (_send()) ;
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}
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public:
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Ipxe_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::Env &env)
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: Session_component(tx_buf_size, rx_buf_size, Genode::CACHED,
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rx_block_md_alloc, env)
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{
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instance = this;
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dde_ipxe_nic_register_callbacks(_rx_callback, _link_callback);
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dde_ipxe_nic_get_mac_addr(1, _mac_addr.addr);
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Genode::log("MAC address ", _mac_addr);
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}
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~Ipxe_session_component()
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{
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instance = nullptr;
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dde_ipxe_nic_unregister_callbacks();
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}
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/**************************************
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** Nic::Session_component interface **
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**************************************/
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Nic::Mac_address mac_address() override { return _mac_addr; }
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bool link_state() override
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{
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return dde_ipxe_nic_link_state(1);
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}
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};
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Ipxe_session_component *Ipxe_session_component::instance;
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struct Main
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{
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Env &_env;
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Heap _heap { _env.ram(), _env.rm() };
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Nic::Root<Ipxe_session_component> root {_env, _heap };
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Main(Env &env) : _env(env)
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{
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Genode::log("--- iPXE NIC driver started ---");
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Genode::log("-- init iPXE NIC");
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/* pass Env to backend */
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dde_support_init(_env, _heap);
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if (!dde_ipxe_nic_init()) {
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Genode::error("could not find usable NIC device");
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}
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_env.parent().announce(_env.ep().manage(root));
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}
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};
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void Component::construct(Genode::Env &env)
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{
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/* XXX execute constructors of global statics */
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env.exec_static_constructors();
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static Main main(env);
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}
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