151 lines
4.6 KiB
C++
151 lines
4.6 KiB
C++
/*
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* \brief Downlink interface in form of a NIC session component
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* \author Martin Stein
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* \date 2017-03-08
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*/
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/*
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* Copyright (C) 2016-2017 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 Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <os/session_policy.h>
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/* local includes */
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#include <component.h>
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#include <uplink.h>
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using namespace Net;
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using namespace Genode;
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/**************************
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** Communication_buffer **
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**************************/
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Communication_buffer::Communication_buffer(Ram_session &ram,
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Genode::size_t const size)
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:
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Ram_dataspace_capability(ram.alloc(size)), _ram(ram)
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{ }
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/****************************
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** Session_component_base **
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****************************/
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Session_component_base::
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Session_component_base(Allocator &guarded_alloc_backing,
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size_t const guarded_alloc_amount,
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Ram_session &buf_ram,
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size_t const tx_buf_size,
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size_t const rx_buf_size)
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:
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_guarded_alloc(&guarded_alloc_backing, guarded_alloc_amount),
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_range_alloc(&_guarded_alloc), _tx_buf(buf_ram, tx_buf_size),
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_rx_buf(buf_ram, rx_buf_size)
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{ }
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/***********************
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** Session_component **
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***********************/
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Net::Session_component::Session_component(Allocator &alloc,
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size_t const amount,
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Ram_session &buf_ram,
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size_t const tx_buf_size,
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size_t const rx_buf_size,
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Region_map ®ion_map,
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Uplink &uplink,
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Xml_node config,
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Timer::Connection &timer,
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unsigned &curr_time,
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Entrypoint &ep)
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:
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Session_component_base(alloc, amount, buf_ram, tx_buf_size, rx_buf_size),
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Session_rpc_object(region_map, _tx_buf, _rx_buf, &_range_alloc, ep.rpc_ep()),
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Interface(ep, config.attribute_value("downlink", Interface_label()),
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timer, curr_time, config.attribute_value("time", false),
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_guarded_alloc),
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_mac(uplink.mac_address())
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{
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_tx.sigh_ready_to_ack(_sink_ack);
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_tx.sigh_packet_avail(_sink_submit);
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_rx.sigh_ack_avail(_source_ack);
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_rx.sigh_ready_to_submit(_source_submit);
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Interface::remote(uplink);
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uplink.Interface::remote(*this);
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}
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bool Session_component::link_state()
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{
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warning("Session_component::link_state not implemented");
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return false;
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}
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void Session_component::link_state_sigh(Signal_context_capability sigh)
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{
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warning("Session_component::link_state_sigh not implemented");
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}
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/**********
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** Root **
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**********/
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Net::Root::Root(Entrypoint &ep,
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Allocator &alloc,
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Uplink &uplink,
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Ram_session &buf_ram,
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Xml_node config,
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Timer::Connection &timer,
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unsigned &curr_time,
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Region_map ®ion_map)
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:
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Root_component<Session_component, Genode::Single_client>(&ep.rpc_ep(),
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&alloc),
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_ep(ep), _uplink(uplink), _buf_ram(buf_ram),
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_region_map(region_map), _config(config), _timer(timer),
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_curr_time(curr_time)
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{ }
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Session_component *Net::Root::_create_session(char const *args)
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{
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try {
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size_t const ram_quota =
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Arg_string::find_arg(args, "ram_quota").ulong_value(0);
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size_t const tx_buf_size =
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Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
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size_t const rx_buf_size =
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Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
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size_t const session_size =
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max((size_t)4096, sizeof(Session_component));
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if (ram_quota < session_size) {
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throw Insufficient_ram_quota(); }
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if (tx_buf_size > ram_quota - session_size ||
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rx_buf_size > ram_quota - session_size ||
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tx_buf_size + rx_buf_size > ram_quota - session_size)
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{
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error("insufficient 'ram_quota' for session creation");
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throw Insufficient_ram_quota();
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}
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return new (md_alloc())
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Session_component(*md_alloc(), ram_quota - session_size,
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_buf_ram, tx_buf_size, rx_buf_size, _region_map,
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_uplink, _config, _timer, _curr_time, _ep);
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}
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catch (...) { throw Service_denied(); }
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}
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