mirror of
https://github.com/genodelabs/genode.git
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Make calls using IPCs IRQ safe, handle packet exhaustion, removed 'Packet_pool', tweak TCP rmem and wmem buffer sizes to show better performance results, use 'Net::Packet_allocator, fix 'update-patch' Makefile command
241 lines
4.8 KiB
C++
241 lines
4.8 KiB
C++
/*
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* \brief Genode C API framebuffer functions of the L4Linux support library
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* \author Stefan Kalkowski
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* \date 2009-06-08
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*/
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/*
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* Copyright (C) 2009-2012 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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/* Genode includes */
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#include <base/allocator_avl.h>
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#include <base/env.h>
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#include <base/exception.h>
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#include <base/printf.h>
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#include <util/misc_math.h>
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#include <util/string.h>
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#include <nic/packet_allocator.h>
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#include <nic_session/connection.h>
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#include <timer_session/connection.h>
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#include <vcpu.h>
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#include <linux.h>
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namespace Fiasco {
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#include <genode/net.h>
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#include <l4/sys/irq.h>
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#include <l4/sys/kdebug.h>
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#include <l4/sys/ktrace.h>
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}
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#define TX_BENCH 0
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#define RX_BENCH 0
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/**
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* Debugging/Tracing
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*/
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#if TX_BENCH | RX_BENCH
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struct Counter : public Genode::Thread<8192>
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{
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int cnt;
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Genode::size_t size;
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void entry()
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{
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Timer::Connection _timer;
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int interval = 5;
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while(1) {
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_timer.msleep(interval * 1000);
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PDBG("LX Packets %d/s bytes/s: %d", cnt / interval, size / interval);
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cnt = 0;
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size = 0;
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}
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}
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void inc(Genode::size_t s) { cnt++; size += s; }
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Counter() : cnt(0), size(0) { start(); }
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};
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#else
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struct Counter { inline void inc(Genode::size_t s) { } };
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#endif
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static Nic::Connection *nic() {
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enum {
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PACKET_SIZE = Nic::Packet_allocator::DEFAULT_PACKET_SIZE,
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RX_BUF_SIZE = Nic::Session::RX_QUEUE_SIZE * PACKET_SIZE,
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TX_BUF_SIZE = Nic::Session::TX_QUEUE_SIZE * PACKET_SIZE,
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};
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static Nic::Connection *n = 0;
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static bool initialized = false;
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if (initialized)
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return n;
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try {
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Linux::Irq_guard guard;
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static Nic::Packet_allocator tx_block_alloc(Genode::env()->heap());
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static Nic::Connection nic(&tx_block_alloc, TX_BUF_SIZE, RX_BUF_SIZE);
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n = &nic;
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} catch(...) { }
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initialized = true;
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return n;
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}
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namespace {
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class Signal_thread : public Genode::Thread<8192>
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{
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private:
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Fiasco::l4_cap_idx_t _cap;
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Genode::Lock *_sync;
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protected:
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void entry()
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{
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using namespace Fiasco;
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using namespace Genode;
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Signal_receiver receiver;
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Signal_context rx;
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Signal_context_capability cap(receiver.manage(&rx));
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nic()->rx_channel()->sigh_ready_to_ack(cap);
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nic()->rx_channel()->sigh_packet_avail(cap);
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_sync->unlock();
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while (true) {
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receiver.wait_for_signal();
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if (l4_error(l4_irq_trigger(_cap)) != -1)
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PWRN("IRQ net trigger failed\n");
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}
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}
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public:
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Signal_thread(Fiasco::l4_cap_idx_t cap, Genode::Lock *sync)
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: Genode::Thread<8192>("net-signal-thread"), _cap(cap), _sync(sync) {
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start(); }
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};
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}
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using namespace Fiasco;
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extern "C" {
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static FASTCALL void (*receive_packet)(void*, void*, unsigned long) = 0;
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static void *net_device = 0;
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void genode_net_start(void *dev, FASTCALL void (*func)(void*, void*, unsigned long))
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{
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receive_packet = func;
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net_device = dev;
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}
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l4_cap_idx_t genode_net_irq_cap()
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{
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Linux::Irq_guard guard;
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static Genode::Native_capability cap = L4lx::vcpu_connection()->alloc_irq();
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static Genode::Lock lock(Genode::Lock::LOCKED);
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static Signal_thread th(cap.dst(), &lock);
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lock.lock();
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return cap.dst();
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}
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void genode_net_stop()
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{
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net_device = 0;
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receive_packet = 0;
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}
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void genode_net_mac(void* mac, unsigned long size)
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{
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Linux::Irq_guard guard;
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using namespace Genode;
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Nic::Mac_address m = nic()->mac_address();
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memcpy(mac, &m.addr, min(sizeof(m.addr), (size_t)size));
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}
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int genode_net_tx(void* addr, unsigned long len)
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{
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Linux::Irq_guard guard;
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static Counter counter;
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try {
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Packet_descriptor packet = nic()->tx()->alloc_packet(len);
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void* content = nic()->tx()->packet_content(packet);
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Genode::memcpy((char *)content, addr, len);
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nic()->tx()->submit_packet(packet);
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counter.inc(len);
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return 0;
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/* 'Packet_alloc_failed' */
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} catch(...) {
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return 1;
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}
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}
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int genode_net_tx_ack_avail() {
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return nic()->tx()->ack_avail(); }
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void genode_net_tx_ack()
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{
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Linux::Irq_guard guard;
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Packet_descriptor packet = nic()->tx()->get_acked_packet();
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nic()->tx()->release_packet(packet);
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}
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void genode_net_rx_receive()
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{
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Linux::Irq_guard guard;
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static Counter counter;
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if (nic()) {
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while(nic()->rx()->packet_avail()) {
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Packet_descriptor p = nic()->rx()->get_packet();
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if (receive_packet && net_device)
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receive_packet(net_device, nic()->rx()->packet_content(p), p.size());
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counter.inc(p.size());
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nic()->rx()->acknowledge_packet(p);
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}
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}
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}
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int genode_net_ready()
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{
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return nic() ? 1 : 0;
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}
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void *genode_net_memcpy(void *dst, void const *src, unsigned long size) {
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return Genode::memcpy(dst, src, size); }
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}
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