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Replace Nic driver interface by customizable component

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Removed the Nic::Driver implementation. All nic servers now inherit from
Nic::Session_component. Packet stream signals are dispatched to
the 'handle_packet_stream' function within a session component. Thus, nic
servers now have direct access to the packet stream channels, making handling
more flexible.

Adjusted nic_loobpack, dde_ipxe, wifi, usb, lan9118, Linux nic, and OpenVPN to
the new interface.

Fixes #1602
This commit is contained in:
Sebastian Sumpf 2015-06-23 13:13:20 +02:00 committed by Christian Helmuth
parent cc4febd1c2
commit 463c9bec17
20 changed files with 1125 additions and 1832 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

197
repos/dde_ipxe/src/drivers/nic/main.cc
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@ -1,6 +1,7 @@
/* /*
* \brief NIC driver based on iPXE * \brief NIC driver based on iPXE
* \author Christian Helmuth * \author Christian Helmuth
* \author Sebastian Sumpf
* \date 2011-11-17 * \date 2011-11-17
*/ */
@ -17,131 +18,133 @@
#include <base/printf.h> #include <base/printf.h>
#include <cap_session/connection.h> #include <cap_session/connection.h>
#include <nic/component.h> #include <nic/component.h>
#include <nic/root.h>
#include <os/server.h> #include <os/server.h>
#include <dde_ipxe/nic.h> #include <dde_ipxe/nic.h>
namespace Ipxe { class Ipxe_session_component : public Nic::Session_component
{
public:
class Driver : public Nic::Driver static Ipxe_session_component *instance;
{
public:
static Driver *instance; private:
private: Nic::Mac_address _mac_addr;
Server::Entrypoint &_ep; static void _rx_callback(unsigned if_index,
const char *packet,
unsigned packet_len)
{
if (instance)
instance->_receive(packet, packet_len);
}
Nic::Mac_address _mac_addr; static void _link_callback()
Nic::Rx_buffer_alloc &_alloc; {
Nic::Driver_notification &_notify; if (instance)
instance->_link_state_changed();
}
static void _rx_callback(unsigned if_index, bool _send()
const char *packet, {
unsigned packet_len) using namespace Genode;
{
instance->rx_handler(packet, packet_len); if (!_tx.sink()->ready_to_ack())
return false;
if (!_tx.sink()->packet_avail())
return false;
Packet_descriptor packet = _tx.sink()->get_packet();
if (!packet.valid()) {
PWRN("Invalid tx packet");
return true;
} }
static void _link_callback() { instance->link_state_changed(); } if (dde_ipxe_nic_tx(1, _tx.sink()->packet_content(packet), packet.size()))
PWRN("Sending packet failed!");
public: _tx.sink()->acknowledge_packet(packet);
return true;
}
Driver(Server::Entrypoint &ep, Nic::Rx_buffer_alloc &alloc, void _receive(const char *packet, unsigned packet_len)
Nic::Driver_notification &notify) {
: _ep(ep), _alloc(alloc), _notify(notify) _handle_packet_stream();
{
PINF("--- init callbacks");
dde_ipxe_nic_register_callbacks(_rx_callback, _link_callback);
dde_ipxe_nic_get_mac_addr(1, _mac_addr.addr); if (!_rx.source()->ready_to_submit())
PINF("--- get MAC address %02x:%02x:%02x:%02x:%02x:%02x", return;
_mac_addr.addr[0] & 0xff, _mac_addr.addr[1] & 0xff,
_mac_addr.addr[2] & 0xff, _mac_addr.addr[3] & 0xff, try {
_mac_addr.addr[4] & 0xff, _mac_addr.addr[5] & 0xff); Nic::Packet_descriptor p = _rx.source()->alloc_packet(packet_len);
Genode::memcpy(_rx.source()->packet_content(p), packet, packet_len);
_rx.source()->submit_packet(p);
} catch (...) {
PDBG("failed to process received packet");
} }
}
~Driver() { dde_ipxe_nic_unregister_callbacks(); } void _handle_packet_stream() override
{
while (_rx.source()->ack_avail())
_rx.source()->release_packet(_rx.source()->get_acked_packet());
void rx_handler(const char *packet, unsigned packet_len) while (_send()) ;
{ }
try {
void *buffer = _alloc.alloc(packet_len);
Genode::memcpy(buffer, packet, packet_len);
_alloc.submit();
} catch (...) {
PDBG("failed to process received packet");
}
}
void link_state_changed() { _notify.link_state_changed(); } public:
Ipxe_session_component(Genode::size_t const tx_buf_size,
Genode::size_t const rx_buf_size,
Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Server::Entrypoint &ep)
: Session_component(tx_buf_size, rx_buf_size, rx_block_md_alloc, ram_session, ep)
{
instance = this;
PINF("--- init callbacks");
dde_ipxe_nic_register_callbacks(_rx_callback, _link_callback);
dde_ipxe_nic_get_mac_addr(1, _mac_addr.addr);
PINF("--- get MAC address %02x:%02x:%02x:%02x:%02x:%02x",
_mac_addr.addr[0] & 0xff, _mac_addr.addr[1] & 0xff,
_mac_addr.addr[2] & 0xff, _mac_addr.addr[3] & 0xff,
_mac_addr.addr[4] & 0xff, _mac_addr.addr[5] & 0xff);
}
~Ipxe_session_component()
{
instance = nullptr;
dde_ipxe_nic_unregister_callbacks();
}
/**************************************
** Nic::Session_component interface **
**************************************/
Nic::Mac_address mac_address() override { return _mac_addr; }
bool link_state() override
{
return dde_ipxe_nic_link_state(1);
}
};
/*************************** Ipxe_session_component *Ipxe_session_component::instance;
** Nic::Driver interface **
***************************/
Nic::Mac_address mac_address() override { return _mac_addr; }
bool link_state() override
{
return dde_ipxe_nic_link_state(1);
}
void tx(char const *packet, Genode::size_t size)
{
if (dde_ipxe_nic_tx(1, packet, size))
PWRN("Sending packet failed!");
}
/******************************
** Irq_activation interface **
******************************/
void handle_irq(int) { /* not used */ }
};
} /* namespace Ipxe */
Ipxe::Driver * Ipxe::Driver::instance = 0;
struct Main struct Main
{ {
Server::Entrypoint &ep; Server::Entrypoint &ep;
Genode::Sliced_heap sliced_heap;
struct Factory : public Nic::Driver_factory Nic::Root<Ipxe_session_component> root {ep, *Genode::env()->heap() };
{
Server::Entrypoint &ep;
Factory(Server::Entrypoint &ep) : ep(ep) { } Main(Server::Entrypoint &ep) : ep(ep)
Nic::Driver *create(Nic::Rx_buffer_alloc &alloc,
Nic::Driver_notification &notify)
{
Ipxe::Driver::instance = new (Genode::env()->heap()) Ipxe::Driver(ep, alloc, notify);
return Ipxe::Driver::instance;
}
void destroy(Nic::Driver *)
{
Genode::destroy(Genode::env()->heap(), Ipxe::Driver::instance);
Ipxe::Driver::instance = 0;
}
} factory;
Nic::Root root;
Main(Server::Entrypoint &ep)
:
ep(ep),
sliced_heap(Genode::env()->ram_session(), Genode::env()->rm_session()),
factory(ep),
root(&ep.rpc_ep(), &sliced_heap, factory)
{ {
PINF("--- iPXE NIC driver started ---\n"); PINF("--- iPXE NIC driver started ---\n");

181
repos/dde_ipxe/src/drivers/nic_stat/main.cc
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@ -1,181 +0,0 @@
/*
* \brief NIC driver based on iPXE for performance measurements solely
* \author Christian Helmuth
* \date 2011-11-17
*/
/*
* 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.
*/
/* Genode include */
#include <base/env.h>
#include <base/sleep.h>
#include <base/printf.h>
#include <cap_session/connection.h>
#include <nic/component.h>
#include <os/server.h>
#include <nic/stat.h>
#include <nic/packet_allocator.h>
#include <nic_session/connection.h>
/* DDE */
extern "C" {
#include <dde_ipxe/nic.h>
}
namespace Ipxe {
class Driver : public Nic::Driver
{
public:
static Driver *instance;
private:
Nic::Mac_address _mac_addr;
Nic::Rx_buffer_alloc &_alloc;
Nic::Driver_notification &_notify;
Timer::Connection _timer;
Nic::Measurement _stat;
static void _rx_callback(unsigned if_index,
const char *packet,
unsigned packet_len)
{
instance->rx_handler_stat(packet, packet_len);
}
static void _link_callback() { instance->link_state_changed(); }
public:
Driver(Server::Entrypoint &ep, Nic::Rx_buffer_alloc &alloc,
Nic::Driver_notification &notify)
: _alloc(alloc), _notify(notify), _stat(_timer)
{
PINF("--- init iPXE NIC");
int cnt = dde_ipxe_nic_init(&ep);
PINF(" number of devices: %d", cnt);
PINF("--- init callbacks");
dde_ipxe_nic_register_callbacks(_rx_callback, _link_callback);
dde_ipxe_nic_get_mac_addr(1, _mac_addr.addr);
PINF("--- get MAC address %02x:%02x:%02x:%02x:%02x:%02x",
_mac_addr.addr[0] & 0xff, _mac_addr.addr[1] & 0xff,
_mac_addr.addr[2] & 0xff, _mac_addr.addr[3] & 0xff,
_mac_addr.addr[4] & 0xff, _mac_addr.addr[5] & 0xff);
_stat.set_mac(_mac_addr.addr);
}
void rx_handler_stat(const char *packet, unsigned packet_len)
{
Genode::addr_t test = reinterpret_cast<Genode::addr_t>(packet);
void * buffer = reinterpret_cast<void *>(test);
Net::Ethernet_frame *eth =
new (buffer) Net::Ethernet_frame(packet_len);
_stat.data(eth, packet_len);
}
void rx_handler(const char *packet, unsigned packet_len)
{
void *buffer = _alloc.alloc(packet_len);
Genode::memcpy(buffer, packet, packet_len);
_alloc.submit();
}
void link_state_changed() { _notify.link_state_changed(); }
/***************************
** Nic::Driver interface **
***************************/
Nic::Mac_address mac_address() { return _mac_addr; }
bool link_state() override
{
return dde_ipxe_nic_link_state(1);
}
void tx(char const *packet, Genode::size_t size)
{
if (dde_ipxe_nic_tx(1, packet, size))
PWRN("Sending packet failed!");
}
/******************************
** Irq_activation interface **
******************************/
void handle_irq(int) { /* not used */ }
};
} /* namespace Ipxe */
Ipxe::Driver * Ipxe::Driver::instance = 0;
struct Main
{
Server::Entrypoint &ep;
Genode::Sliced_heap sliced_heap;
struct Factory : public Nic::Driver_factory
{
Server::Entrypoint &ep;
Factory(Server::Entrypoint &ep) : ep(ep) { }
Nic::Driver *create(Nic::Rx_buffer_alloc &alloc,
Nic::Driver_notification &notify)
{
Ipxe::Driver::instance = new (Genode::env()->heap()) Ipxe::Driver(ep, alloc, notify);
return Ipxe::Driver::instance;
}
void destroy(Nic::Driver *)
{
Genode::destroy(Genode::env()->heap(), Ipxe::Driver::instance);
Ipxe::Driver::instance = 0;
}
} factory;
Nic::Root root;
Main(Server::Entrypoint &ep)
:
ep(ep),
sliced_heap(Genode::env()->ram_session(), Genode::env()->rm_session()),
factory(ep),
root(&ep.rpc_ep(), &sliced_heap, factory)
{
PINF("--- iPXE NIC driver started ---\n");
Genode::env()->parent()->announce(ep.manage(root));
root.session("ram_quota=155648, tx_buf_size=65536, rx_buf_size=65536",
Genode::Affinity());
}
};
/************
** Server **
************/
namespace Server {
char const *name() { return "nic_drv_stat_ep"; }
size_t stack_size() { return 2*1024*sizeof(long); }
void construct(Entrypoint &ep) { static Main server(ep); }
}

3
repos/dde_ipxe/src/drivers/nic_stat/target.mk
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@ -1,3 +0,0 @@
TARGET = nic_drv_stat
LIBS = base server dde_ipxe_nic net-stat
SRC_CC = main.cc

327
repos/dde_linux/src/lib/usb/include/nic/component.h
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@ -1,327 +0,0 @@
/*
* \brief Block-session implementation for network devices
* \author Sebastian Sumpf
* \date 2012-07-05
*/
/*
* Copyright (C) 2012-2013 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 _NIC__COMPONENT_H_
#define _NIC__COMPONENT_H_
#include <root/component.h>
#include <nic/packet_allocator.h>
#include <nic_session/rpc_object.h>
#include <timer_session/connection.h>
#include <signal/dispatch.h>
#define BENCH 0
namespace Nic {
using namespace Genode;
class Session_component;
#if BENCH
struct Counter : public Genode::Thread<8192>
{
char const *prefix;
int cnt;
int burst;
size_t size;
void entry()
{
Timer::Connection _timer;
int interval = 5;
while(1) {
_timer.msleep(interval * 1000);
PDBG("%s: Packets %d/s (in %d burst packets) bytes/s: %d",
prefix, cnt / interval, burst / interval, size / interval);
cnt = 0;
size = 0;
burst = 0;
}
}
void inc(size_t s) { cnt++; size += s; }
void inc_burst() { burst++; }
Counter(char const *prefix)
: Thread("counter"), prefix(prefix), cnt(0), burst(0), size(0)
{ start(); }
};
#else
struct Counter
{
Counter(char const *) { };
void inc(size_t) { }
void inc_burst() { }
};
#endif
struct Device : ::Device
{
Session_component *_session;
/**
* Transmit data to driver
*/
virtual bool tx(addr_t virt, size_t size) = 0;
/**
* Return mac address of device
*/
virtual Mac_address mac_address() = 0;
/**
* Return current link-state (true if link detected)
*/
virtual bool link_state() = 0;
/**
* Set session belonging to this driver
*/
void session(Session_component *s) { _session = s; }
/**
* Check for session
*/
bool session() { return _session != 0; }
/**
* Alloc an SKB
*/
virtual sk_buff *alloc_skb() = 0;
/**
* Submit SKB to device
*/
virtual void tx_skb(sk_buff *skb) = 0;
/**
* Setup SKB with 'data' of 'size', return 'false' if SKB is longer than
* 'end'.
*/
virtual bool skb_fill(struct sk_buff *skb, unsigned char *data, Genode::size_t size, unsigned char *end) = 0;
/**
* Call driver fixup function on SKB
*/
virtual void tx_fixup(struct sk_buff *skb) = 0;
/**
* Return true if device supports burst operations
*/
virtual bool burst() = 0;
Device() : _session(0) { }
};
class Session_component : public Nic::Packet_allocator,
public Packet_session_component<Session_rpc_object>
{
private:
Device *_device; /* device this session is using */
Tx::Sink *_tx_sink; /* client packet sink */
bool _tx_alloc; /* get next packet from client or use _tx_packet */
Packet_descriptor _tx_packet; /* saved packet in case of driver errors */
Signal_context_capability _link_state_sigh;
void _send_packet_avail_signal() {
Signal_transmitter(_tx.sigh_packet_avail()).submit(); }
protected:
void _process_packets(unsigned)
{
static sk_buff work_skb; /* dummy skb for fixup calls */
static Counter counter("TX");
int tx_cnt = 0;
unsigned size = 0;
sk_buff *skb = 0;
unsigned char *ptr = 0;
/* submit received packets to lower layer */
while (_tx_sink->packet_avail())
{
Packet_descriptor packet = _tx_alloc ? _tx_sink->get_packet() : _tx_packet;
addr_t virt = (addr_t)_tx_sink->packet_content(packet);
if (_device->burst()) {
if (!ptr || !_device->skb_fill(&work_skb, ptr, packet.size(), skb->end)) {
/* submit batch to device */
if (ptr) {
_device->tx_skb(skb);
tx_cnt++;
counter.inc_burst();
}
/* alloc new SKB */
skb = _device->alloc_skb();
if (!skb) {
_send_packet_avail_signal();
_tx_alloc = false;
_tx_packet = packet;
return;
}
_tx_alloc = true;
ptr = skb->data;
work_skb.data = 0;
_device->skb_fill(&work_skb, ptr, packet.size(), skb->end);
}
/* copy packet to current data pos */
Genode::memcpy(work_skb.data, (void *)virt, packet.size());
/* call fixup on dummy SKB */
_device->tx_fixup(&work_skb);
/* advance to next slot */
ptr = work_skb.end;
skb->len += work_skb.truesize;
} else {
/* send to driver */
if (!(_device->tx(virt, packet.size()))) {
_send_packet_avail_signal();
_tx_alloc = false;
_tx_packet = packet;
return;
}
_tx_alloc = true;
tx_cnt++;
}
counter.inc(packet.size());
/* acknowledge to client */
_tx_sink->acknowledge_packet(packet);
/* it's cooperative scheduling - be nice */
if (tx_cnt == 20)
break;
}
/* sumbit last skb */
if (skb) {
_device->tx_skb(skb);
counter.inc_burst();
}
/* for large TCP/s check RX immediately */
Irq::check_irq();
/* release acknowledged packets */
_rx_ack(false);
if (_tx_sink->packet_avail())
_send_packet_avail_signal();
}
void _rx_ack(bool block = true)
{
while (_rx.source()->ack_avail() || block)
{
Packet_descriptor packet = _rx.source()->get_acked_packet();
/* free packet buffer */
_rx.source()->release_packet(packet);
block = false;
}
}
public:
/**
* Constructor
*/
Session_component(Dataspace_capability tx_ds,
Dataspace_capability rx_ds,
Server::Entrypoint &ep,
::Device *device)
:
Nic::Packet_allocator(Genode::env()->heap()),
Packet_session_component(tx_ds, rx_ds, this, ep),
_device(static_cast<Device *>(device)),
_tx_sink(Session_rpc_object::_tx.sink()),
_tx_alloc(true)
{ _device->session(this); }
/**
* Link state changed (called from driver)
*/
void link_state_changed()
{
if (_link_state_sigh.valid())
Genode::Signal_transmitter(_link_state_sigh).submit();
}
Mac_address mac_address() { return _device->mac_address(); }
bool link_state() override {
return _device->link_state(); }
void link_state_sigh(Genode::Signal_context_capability sigh) {
_link_state_sigh = sigh; }
/**
* Send packet to client (called form driver)
*/
void rx(addr_t virt, size_t size)
{
static Counter counter("RX");
while (true) {
try {
Packet_descriptor p =_rx.source()->alloc_packet(size);
Genode::memcpy(_rx.source()->packet_content(p), (void*)virt, size);
_rx.source()->submit_packet(p);
counter.inc(size);
} catch (...) {
/* ack or block */
_rx_ack();
continue;
}
break;
}
_rx_ack(false);
}
};
/*
* Shortcut for single-client root component
*/
typedef Root_component<Session_component, Single_client> Root_component;
/**
* Root component, handling new session requests
*/
class Root : public Packet_root<Root_component, Session_component, CACHED>
{
public:
Root(Server::Entrypoint &ep, Allocator *md_alloc,
Device *device)
: Packet_root(ep, md_alloc, device) { }
};
}
#endif /* _NIC__COMPONENT_H_ */

133
repos/dde_linux/src/lib/usb/include/signal/dispatch.h
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@ -1,133 +0,0 @@
/**
* \brief Packet-stream-session components
* \author Sebastian Sumpf
* \author Norman Feske
* \date 2012-07-06
*/
/*
* Copyright (C) 2012-2013 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 _SIGNAL__DISPATCHER_H_
#define _SIGNAL__DISPATCHER_H_
#include "signal.h"
#include "platform/lx_mem.h"
/**
* Session components that overrides signal handlers
*/
template <typename RPC>
class Packet_session_component : public RPC
{
private:
Genode::Signal_rpc_member<Packet_session_component> _dispatcher;
protected:
virtual void _process_packets(unsigned) = 0;
public:
Packet_session_component(Genode::Dataspace_capability tx_ds,
Server::Entrypoint &ep)
: RPC(tx_ds, ep.rpc_ep()),
_dispatcher(ep, *this, &Packet_session_component::_process_packets)
{
/*
* Register '_process_packets' dispatch function as signal
* handler for packet-avail and ready-to-ack signals.
*/
RPC::_tx.sigh_packet_avail(_dispatcher);
RPC::_tx.sigh_ready_to_ack(_dispatcher);
}
Packet_session_component(Genode::Dataspace_capability tx_ds,
Genode::Dataspace_capability rx_ds,
Genode::Range_allocator *rx_buffer_alloc,
Server::Entrypoint &ep)
: RPC(tx_ds, rx_ds, rx_buffer_alloc, ep.rpc_ep()),
_dispatcher(ep, *this, &Packet_session_component::_process_packets)
{
/*
* Register '_process_packets' dispatch function as signal
* handler for packet-avail and ready-to-ack signals.
*/
RPC::_tx.sigh_packet_avail(_dispatcher);
RPC::_tx.sigh_ready_to_ack(_dispatcher);
}
};
/**
* Abstract device
*/
struct Device { };
/**
* Root component, handling new session requests
*/
template <typename ROOT_COMPONENT, typename SESSION_COMPONENT,
Genode::Cache_attribute CACHEABILITY>
class Packet_root : public ROOT_COMPONENT
{
private:
Server::Entrypoint &_ep;
Device *_device;
protected:
/**
* Always returns the singleton block-session component
*/
SESSION_COMPONENT *_create_session(const char *args)
{
using namespace Genode;
size_t ram_quota =
Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
size_t tx_buf_size =
Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
size_t rx_buf_size =
Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
/* delete ram quota by the memory needed for the session */
size_t session_size = max((size_t)4096,
sizeof(SESSION_COMPONENT)
+ sizeof(Allocator_avl));
if (ram_quota < session_size)
throw Root::Quota_exceeded();
/*
* Check if donated ram quota suffices for both communication
* buffers. Also check both sizes separately to handle a
* possible overflow of the sum of both sizes.
*/
if (tx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + session_size);
throw Root::Quota_exceeded();
}
return new (ROOT_COMPONENT::md_alloc())
SESSION_COMPONENT(Backend_memory::alloc(tx_buf_size, CACHEABILITY),
Backend_memory::alloc(rx_buf_size, CACHEABILITY),
_ep, _device);
}
public:
Packet_root(Server::Entrypoint &ep, Genode::Allocator *md_alloc,
Device *device)
: ROOT_COMPONENT(&ep.rpc_ep(), md_alloc),
_ep(ep), _device(device) { }
};
#endif /* _SIGNAL__DISPATCHER_H_ */

272
repos/dde_linux/src/lib/usb/include/usb_nic_component.h Normal file
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@ -0,0 +1,272 @@
/*
* \brief Block-session implementation for network devices
* \author Sebastian Sumpf
* \date 2012-07-05
*/
/*
* Copyright (C) 2012-2013 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 _USB_NIC_COMPONENT_H_
#define _USB_NIC_COMPONENT_H_
#include <nic/component.h>
#include <root/component.h>
namespace Usb_nic {
using namespace Genode;
class Session_component;
struct Device;
};
struct Usb_nic::Device
{
Session_component *_session;
/**
* Transmit data to driver
*/
virtual bool tx(addr_t virt, size_t size) = 0;
/**
* Return mac address of device
*/
virtual Nic::Mac_address mac_address() = 0;
/**
* Return current link-state (true if link detected)
*/
virtual bool link_state() = 0;
/**
* Set session belonging to this driver
*/
void session(Session_component *s) { _session = s; }
/**
* Check for session
*/
bool session() { return _session != 0; }
/**
* Alloc an SKB
*/
virtual sk_buff *alloc_skb() = 0;
/**
* Submit SKB to device
*/
virtual void tx_skb(sk_buff *skb) = 0;
/**
* Setup SKB with 'data' of 'size', return 'false' if SKB is longer than
* 'end'.
*/
virtual bool skb_fill(struct sk_buff *skb, unsigned char *data, Genode::size_t size, unsigned char *end) = 0;
/**
* Call driver fixup function on SKB
*/
virtual void tx_fixup(struct sk_buff *skb) = 0;
/**
* Return true if device supports burst operations
*/
virtual bool burst() = 0;
Device() : _session(0) { }
};
class Usb_nic::Session_component : public Nic::Session_component
{
private:
Device *_device; /* device this session is using */
protected:
void _send_burst()
{
static sk_buff work_skb; /* dummy skb for fixup calls */
static Packet_descriptor save;
sk_buff *skb = nullptr;
unsigned char *ptr = nullptr;
/* submit received packets to lower layer */
while (((_tx.sink()->packet_avail() || save.valid()) && _tx.sink()->ready_to_ack()))
{
/* alloc skb */
if (!skb) {
if (!(skb = _device->alloc_skb()))
return;
ptr = skb->data;
work_skb.data = nullptr;
}
Packet_descriptor packet = save.valid() ? save : _tx.sink()->get_packet();
save = Packet_descriptor();
if (!_device->skb_fill(&work_skb, ptr, packet.size(), skb->end)) {
/* submit batch */
_device->tx_skb(skb);
skb = nullptr;
save = packet;
continue;
}
/* copy packet to current data pos */
Genode::memcpy(work_skb.data, _tx.sink()->packet_content(packet), packet.size());
/* call fixup on dummy SKB */
_device->tx_fixup(&work_skb);
/* advance to next slot */
ptr = work_skb.end;
skb->len += work_skb.truesize;
/* acknowledge to client */
_tx.sink()->acknowledge_packet(packet);
}
/* submit last skb */
if (skb)
_device->tx_skb(skb);
}
bool _send()
{
if (!_tx.sink()->ready_to_ack())
return false;
if (!_tx.sink()->packet_avail())
return false;
Genode::Packet_descriptor packet = _tx.sink()->get_packet();
if (!packet.valid()) {
PWRN("Invalid tx packet");
return true;
}
bool ret = _device->tx((addr_t)_tx.sink()->packet_content(packet), packet.size());
_tx.sink()->acknowledge_packet(packet);
return ret;
}
void _handle_packet_stream() override
{
while (_rx.source()->ack_avail())
_rx.source()->release_packet(_rx.source()->get_acked_packet());
if (_device->burst())
_send_burst();
else
while (_send());
}
public:
/**
* Constructor
*/
Session_component(Genode::size_t const tx_buf_size,
Genode::size_t const rx_buf_size,
Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Server::Entrypoint &ep,
Device *device)
: Nic::Session_component(tx_buf_size, rx_buf_size, rx_block_md_alloc, ram_session, ep),
_device(device)
{ _device->session(this); }
Nic::Mac_address mac_address() override { return _device->mac_address(); }
bool link_state() override { return _device->link_state(); }
void link_state_changed() { _link_state_changed(); }
/**
* Send packet to client (called from driver)
*/
void rx(addr_t virt, size_t size)
{
_handle_packet_stream();
if (!_rx.source()->ready_to_submit())
return;
try {
Packet_descriptor p =_rx.source()->alloc_packet(size);
Genode::memcpy(_rx.source()->packet_content(p), (void*)virt, size);
_rx.source()->submit_packet(p);
} catch (...) {
/* drop */
return;
}
}
};
/*
* Shortcut for single-client root component
*/
typedef Genode::Root_component<Usb_nic::Session_component, Genode::Single_client> Root_component;
/**
* Root component, handling new session requests
*/
class Root : public Root_component
{
private:
Server::Entrypoint &_ep;
Usb_nic::Device *_device;
protected:
Usb_nic::Session_component *_create_session(const char *args)
{
using namespace Genode;
size_t ram_quota = Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
size_t tx_buf_size = Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
size_t rx_buf_size = Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
/* deplete ram quota by the memory needed for the session structure */
size_t session_size = max(4096UL, (unsigned long)sizeof(Usb_nic::Session_component));
if (ram_quota < session_size)
throw Genode::Root::Quota_exceeded();
/*
* Check if donated ram quota suffices for both communication
* buffers. Also check both sizes separately to handle a
* possible overflow of the sum of both sizes.
*/
if (tx_buf_size > ram_quota - session_size
|| rx_buf_size > ram_quota - session_size
|| tx_buf_size + rx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + rx_buf_size + session_size);
throw Genode::Root::Quota_exceeded();
}
return new (Root::md_alloc())
Usb_nic::Session_component(tx_buf_size, rx_buf_size,
*env()->heap(),
*env()->ram_session(),
_ep, _device);
}
public:
Root(Server::Entrypoint &ep, Genode::Allocator &md_alloc,
Usb_nic::Device *device)
: Root_component(&ep.rpc_ep(), &md_alloc),
_ep(ep), _device(device)
{ }
};
#endif /* _USB_NIC_COMPONENT_H_ */

10
repos/dde_linux/src/lib/usb/nic/nic.cc
View File

@ -25,7 +25,7 @@
#include <linux/usb/usbnet.h> #include <linux/usb/usbnet.h>
#include <extern_c_end.h> #include <extern_c_end.h>
#include <nic/component.h> #include <usb_nic_component.h>
#include "signal.h" #include "signal.h"
@ -137,7 +137,7 @@ typedef struct sk_buff* (*fixup_t)(struct usbnet *, struct sk_buff *, gfp_t);
/** /**
* Net_device to session glue code * Net_device to session glue code
*/ */
class Nic_device : public Nic::Device class Nic_device : public Usb_nic::Device
{ {
public: public:
@ -320,7 +320,7 @@ int register_netdev(struct net_device *ndev)
/* XXX: move to 'main' */ /* XXX: move to 'main' */
if (!announce) { if (!announce) {
static Nic::Root root(_signal->ep(), env()->heap(), nic); static ::Root root(_signal->ep(), *env()->heap(), nic);
announce = true; announce = true;
@ -333,10 +333,6 @@ int register_netdev(struct net_device *ndev)
if (ndev->netdev_ops->ndo_set_rx_mode) if (ndev->netdev_ops->ndo_set_rx_mode)
ndev->netdev_ops->ndo_set_rx_mode(ndev); ndev->netdev_ops->ndo_set_rx_mode(ndev);
/*
if(ndev->netdev_ops->ndo_change_mtu)
ndev->netdev_ops->ndo_change_mtu(ndev, 4000);
*/
_nic = nic; _nic = nic;
env()->parent()->announce(_signal->ep().rpc_ep().manage(&root)); env()->parent()->announce(_signal->ep().rpc_ep().manage(&root));
} }

214
repos/dde_linux/src/lib/wifi/include/nic/component.h
View File

@ -1,214 +0,0 @@
/*
* \brief Nic-session implementation for network devices
* \author Sebastian Sumpf
* \date 2012-07-05
*/
/*
* Copyright (C) 2012-2013 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 _NIC__COMPONENT_H_
#define _NIC__COMPONENT_H_
/* Genode includes */
#include <nic/packet_allocator.h>
#include <nic_session/rpc_object.h>
#include <root/component.h>
#include <timer_session/connection.h>
/* local includes */
#include <nic/dispatch.h>
#include <extern_c_begin.h>
# include <linux/skbuff.h>
#include <extern_c_end.h>
namespace Nic {
using namespace Genode; /* FIXME */
struct Session_component;
struct Device;
typedef Genode::Root_component<Session_component, Single_client> Root_component;
struct Root;
}
struct Nic::Device
{
/**
* Transmit data to driver
*/
virtual bool tx(addr_t virt, size_t size) = 0;
/**
* Return mac address of device
*/
virtual Mac_address mac_address() = 0;
/**
* Return link state (true if link detected)
*/
virtual bool link_state() = 0;
/**
* Set session belonging to this driver
*/
virtual void session(Session_component *s) = 0;
Device() { }
virtual ~Device() { }
};
class Nic::Session_component : public Nic::Packet_allocator,
public Packet_session_component<Session_rpc_object>
{
private:
Device &_device; /* device this session is using */
Tx::Sink *_tx_sink; /* client packet sink */
bool _tx_alloc; /* get next packet from client or use _tx_packet */
Packet_descriptor _tx_packet; /* saved packet in case of driver errors */
Signal_context_capability _link_state_sigh;
void _send_packet_avail_signal() {
Signal_transmitter(_tx.sigh_packet_avail()).submit(); }
protected:
void _process_packets(unsigned)
{
int tx_cnt = 0;
/* submit received packets to lower layer */
while (_tx_sink->packet_avail()) {
Packet_descriptor packet = _tx_alloc ? _tx_sink->get_packet() : _tx_packet;
addr_t virt = (addr_t)_tx_sink->packet_content(packet);
/* send to driver */
if (!(_device.tx(virt, packet.size()))) {
_send_packet_avail_signal();
_tx_alloc = false;
_tx_packet = packet;
return;
}
_tx_alloc = true;
tx_cnt++;
/* acknowledge to client */
_tx_sink->acknowledge_packet(packet);
}
/* release acknowledged packets */
_rx_ack(false);
if (_tx_sink->packet_avail())
_send_packet_avail_signal();
}
void _rx_ack(bool block = true)
{
while (_rx.source()->ack_avail() || block) {
Packet_descriptor packet = _rx.source()->get_acked_packet();
/* free packet buffer */
_rx.source()->release_packet(packet);
block = false;
}
}
public:
/**
* Constructor
*/
Session_component(Dataspace_capability tx_ds,
Dataspace_capability rx_ds,
Server::Entrypoint &ep,
Device &device)
:
Nic::Packet_allocator(Genode::env()->heap()),
Packet_session_component(tx_ds, rx_ds, this, ep),
_device(device),
_tx_sink(Session_rpc_object::_tx.sink()),
_tx_alloc(true)
{ _device.session(this); }
/**
* Send packet to client (called from driver)
*/
void rx(addr_t packet, size_t psize, addr_t frag, size_t fsize)
{
size_t size = psize + fsize;
while (true) {
try {
Packet_descriptor p =_rx.source()->alloc_packet(size);
Genode::memcpy(_rx.source()->packet_content(p), (void*)packet, psize);
if (fsize)
Genode::memcpy(_rx.source()->packet_content(p)+psize, (void*)frag, fsize);
_rx.source()->submit_packet(p);
} catch (...) {
/* ack or block */
_rx_ack();
continue;
}
break;
}
_rx_ack(false);
}
/**
* Link state changed (called from driver)
*/
void link_state_changed()
{
if (_link_state_sigh.valid())
Genode::Signal_transmitter(_link_state_sigh).submit();
}
/***************************
** Nic-session interface **
***************************/
Mac_address mac_address() override
{
return _device.mac_address();
}
bool link_state() // override
{
return _device.link_state();
}
void link_state_sigh(Genode::Signal_context_capability sigh)
{
_link_state_sigh = sigh;
}
};
/**
* Root component, handling new session requests
*/
struct Nic::Root : Packet_root<Root_component, Session_component, Device, CACHED>
{
Root(Server::Entrypoint &ep, Allocator *md_alloc, Device &device)
: Packet_root(ep, md_alloc, device) { }
};
#endif /* _NIC__COMPONENT_H_ */

143
repos/dde_linux/src/lib/wifi/include/nic/dispatch.h
View File

@ -1,143 +0,0 @@
/**
* \brief Packet-stream-session components
* \author Sebastian Sumpf
* \author Norman Feske
* \date 2012-07-06
*/
/*
* Copyright (C) 2012-2013 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 _SIGNAL__DISPATCHER_H_
#define _SIGNAL__DISPATCHER_H_
/* Genode includes */
#include <base/signal.h>
/* local includes */
#include <lx.h>
/**
* Session components that overrides signal handlers
*/
template <typename SESSION_RPC_OBJECT>
class Packet_session_component : public SESSION_RPC_OBJECT
{
private:
Genode::Signal_rpc_member<Packet_session_component> _tx_ready_to_ack_dispatcher;
Genode::Signal_rpc_member<Packet_session_component> _tx_packet_avail_dispatcher;
Genode::Signal_rpc_member<Packet_session_component> _rx_ack_avail_dispatcher;
Genode::Signal_rpc_member<Packet_session_component> _rx_ready_to_submit_dispatcher;
void _tx_ready_to_ack(unsigned)
{
_process_packets(0);
}
void _tx_packet_avail(unsigned)
{
_process_packets(0);
}
void _rx_ack_avail(unsigned)
{
_process_packets(0);
}
void _rx_ready_to_submit(unsigned)
{
_process_packets(0);
}
protected:
virtual void _process_packets(unsigned) = 0;
public:
Packet_session_component(Genode::Dataspace_capability tx_ds,
Genode::Dataspace_capability rx_ds,
Genode::Range_allocator *rx_buffer_alloc,
Server::Entrypoint &ep)
:
SESSION_RPC_OBJECT(tx_ds, rx_ds, rx_buffer_alloc, ep.rpc_ep()),
_tx_ready_to_ack_dispatcher(ep, *this, &Packet_session_component::_tx_ready_to_ack),
_tx_packet_avail_dispatcher(ep, *this, &Packet_session_component::_tx_packet_avail),
_rx_ack_avail_dispatcher(ep, *this, &Packet_session_component::_rx_ack_avail),
_rx_ready_to_submit_dispatcher(ep, *this, &Packet_session_component::_rx_ready_to_submit)
{
SESSION_RPC_OBJECT::_tx.sigh_ready_to_ack(_tx_ready_to_ack_dispatcher);
SESSION_RPC_OBJECT::_tx.sigh_packet_avail(_tx_packet_avail_dispatcher);
SESSION_RPC_OBJECT::_rx.sigh_ack_avail(_rx_ack_avail_dispatcher);
SESSION_RPC_OBJECT::_rx.sigh_ready_to_submit(_rx_ready_to_submit_dispatcher);
}
};
/**
* Root component, handling new session requests
*/
template <typename ROOT_COMPONENT,
typename SESSION_COMPONENT,
typename DEVICE,
Genode::Cache_attribute CACHEABILITY>
class Packet_root : public ROOT_COMPONENT
{
private:
Server::Entrypoint &_ep;
DEVICE &_device;
protected:
/**
* Always returns the singleton block-session component
*/
SESSION_COMPONENT *_create_session(const char *args)
{
using namespace Genode;
size_t ram_quota =
Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
size_t tx_buf_size =
Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
size_t rx_buf_size =
Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
/* delete ram quota by the memory needed for the session */
size_t session_size = max((size_t)4096,
sizeof(SESSION_COMPONENT)
+ sizeof(Allocator_avl));
if (ram_quota < session_size)
throw Root::Quota_exceeded();
/*
* Check if donated ram quota suffices for both communication
* buffers. Also check both sizes separately to handle a
* possible overflow of the sum of both sizes.
*/
if (tx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + session_size);
throw Root::Quota_exceeded();
}
return new (ROOT_COMPONENT::md_alloc())
SESSION_COMPONENT(Lx::backend_alloc(tx_buf_size, CACHEABILITY),
Lx::backend_alloc(rx_buf_size, CACHEABILITY),
_ep, _device);
}
public:
Packet_root(Server::Entrypoint &ep, Genode::Allocator *md_alloc, DEVICE &device)
: ROOT_COMPONENT(&ep.rpc_ep(), md_alloc),
_ep(ep), _device(device) { }
};
#endif /* _SIGNAL__DISPATCHER_H_ */

256
repos/dde_linux/src/lib/wifi/nic.cc
View File

@ -17,17 +17,17 @@
#include <base/snprintf.h> #include <base/snprintf.h>
#include <cap_session/connection.h> #include <cap_session/connection.h>
#include <nic/xml_node.h> #include <nic/xml_node.h>
#include <nic_session/nic_session.h>
#include <os/config.h> #include <os/config.h>
#include <nic/component.h>
#include <root/component.h>
#include <util/xml_node.h> #include <util/xml_node.h>
/* local includes */ /* local includes */
#include <lx.h> #include <lx.h>
#include <nic/component.h>
#include <extern_c_begin.h> #include <extern_c_begin.h>
# include <lx_emul.h> #include <lx_emul.h>
# include <net/cfg80211.h> #include <net/cfg80211.h>
#include <extern_c_end.h> #include <extern_c_end.h>
extern bool config_verbose; extern bool config_verbose;
@ -37,22 +37,91 @@ enum {
}; };
/** /**
* Net_device to session glue code * Nic::Session implementation
*/ */
class Nic_device : public Nic::Device class Wifi_session_component : public Nic::Session_component
{ {
public: /* FIXME */ private:
struct net_device *_ndev; net_device *_ndev;
Nic::Session_component *_session = nullptr; bool _has_link = !(_ndev->state & 1UL << __LINK_STATE_NOCARRIER);
bool _has_link = false;
protected:
bool _send()
{
using namespace Genode;
if (!_tx.sink()->ready_to_ack())
return false;
if (!_tx.sink()->packet_avail())
return false;
Packet_descriptor packet = _tx.sink()->get_packet();
if (!packet.valid()) {
PWRN("Invalid tx packet");
return true;
}
struct sk_buff *skb = ::alloc_skb(packet.size() + HEAD_ROOM, GFP_KERNEL);
skb_reserve(skb, HEAD_ROOM);
unsigned char *data = skb_put(skb, packet.size());
Genode::memcpy(data, _tx.sink()->packet_content(packet), packet.size());
_ndev->netdev_ops->ndo_start_xmit(skb, _ndev);
_tx.sink()->acknowledge_packet(packet);
return true;
}
void _handle_packet_stream()
{
while (_rx.source()->ack_avail())
_rx.source()->release_packet(_rx.source()->get_acked_packet());
while (_send()) ;
}
public: public:
Nic_device(struct net_device *ndev) : _ndev(ndev) { } Wifi_session_component(Genode::size_t const tx_buf_size,
Genode::size_t const rx_buf_size,
void rx(sk_buff *skb) Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Server::Entrypoint &ep, net_device *ndev)
: Session_component(tx_buf_size, rx_buf_size, rx_block_md_alloc, ram_session, ep),
_ndev(ndev)
{ {
_ndev->lx_nic_device = this;
}
~Wifi_session_component()
{
_ndev->lx_nic_device = nullptr;
}
/**
* Report link state
*/
void link_state(bool link)
{
/* only report changes of the link state */
if (link == _has_link)
return;
_has_link = link;
_link_state_changed();
}
void receive(struct sk_buff *skb)
{
_handle_packet_stream();
if (!_rx.source()->ready_to_submit())
return;
/* get mac header back */ /* get mac header back */
skb_push(skb, ETH_HLEN); skb_push(skb, ETH_HLEN);
@ -77,29 +146,24 @@ class Nic_device : public Nic::Device
else else
packet_size += skb->len; packet_size += skb->len;
_session->rx((Genode::addr_t)packet, packet_size, (Genode::addr_t)frag, frag_size);
try {
Nic::Packet_descriptor p = _rx.source()->alloc_packet(packet_size + frag_size);
void *buffer = _rx.source()->packet_content(p);
memcpy(buffer, packet, packet_size);
if (frag_size)
memcpy((char *)buffer + packet_size, frag, frag_size);
_rx.source()->submit_packet(p);
} catch (...) {
PDBG("failed to process received packet");
}
} }
/**
* Report link state
*/
void link_state(bool link)
{
/* only report changes of the link state */
if (link == _has_link)
return;
_has_link = link; /*****************************
** NIC-component interface **
if (_session) *****************************/
_session->link_state_changed();
}
/**********************
** Device interface **
**********************/
void session(Nic::Session_component *s) override { _session = s; }
Nic::Mac_address mac_address() override Nic::Mac_address mac_address() override
{ {
@ -109,32 +173,83 @@ class Nic_device : public Nic::Device
} }
bool link_state() override { return _has_link; } bool link_state() override { return _has_link; }
bool tx(Genode::addr_t virt, Genode::size_t size) override
{
struct sk_buff *skb = ::alloc_skb(size + HEAD_ROOM, GFP_KERNEL);
skb_reserve(skb, HEAD_ROOM);
unsigned char *data = skb_put(skb, size);
Genode::memcpy(data, (void*)virt, size);
_ndev->netdev_ops->ndo_start_xmit(skb, _ndev);
return true;
}
}; };
static Nic_device *_nic = 0; /**
* NIC root implementation
*/
class Root : public Genode::Root_component<Wifi_session_component,
Genode::Single_client>
{
private:
static Server::Entrypoint *_ep; Server::Entrypoint &_ep;
void Lx::nic_init(Server::Entrypoint &ep) { protected:
_ep = &ep; }
Wifi_session_component *_create_session(const char *args)
{
using namespace Genode;
size_t ram_quota = Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
size_t tx_buf_size = Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
size_t rx_buf_size = Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
/* deplete ram quota by the memory needed for the session structure */
size_t session_size = max(4096UL, (unsigned long)sizeof(Wifi_session_component));
if (ram_quota < session_size)
throw Genode::Root::Quota_exceeded();
/*
* Check if donated ram quota suffices for both communication
* buffers. Also check both sizes separately to handle a
* possible overflow of the sum of both sizes.
*/
if (tx_buf_size > ram_quota - session_size
|| rx_buf_size > ram_quota - session_size
|| tx_buf_size + rx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + rx_buf_size + session_size);
throw Genode::Root::Quota_exceeded();
}
session = new (md_alloc())
Wifi_session_component(tx_buf_size, rx_buf_size,
*env()->heap(),
*env()->ram_session(),
_ep, device);
return session;
}
public:
net_device *device = nullptr;
Wifi_session_component *session = nullptr;
static Root *instance;
Root(Server::Entrypoint &ep, Genode::Allocator &md_alloc)
: Genode::Root_component<Wifi_session_component, Genode::Single_client>(&ep.rpc_ep(), &md_alloc),
_ep(ep)
{ }
void announce() { Genode::env()->parent()->announce(_ep.rpc_ep().manage(this)); }
};
Root *Root::instance;
void Lx::nic_init(Server::Entrypoint &ep)
{
static Root root(ep, *Genode::env()->heap());
Root::instance = &root;
}
void Lx::get_mac_address(unsigned char *addr) void Lx::get_mac_address(unsigned char *addr)
{ {
Genode::memcpy(addr, _nic->_ndev->perm_addr, ETH_ALEN); memcpy(addr, Root::instance->device->perm_addr, ETH_ALEN);
} }
@ -319,12 +434,12 @@ extern "C" void __dev_remove_pack(struct packet_type *pt)
extern "C" struct net_device *__dev_get_by_index(struct net *net, int ifindex) extern "C" struct net_device *__dev_get_by_index(struct net *net, int ifindex)
{ {
if (!_nic || !_nic->_ndev) { if (!Root::instance->device) {
PERR("no net device registered!"); PERR("no net device registered!");
return 0; return 0;
} }
return _nic->_ndev; return Root::instance->device;
} }
@ -387,18 +502,10 @@ extern "C" int register_netdevice(struct net_device *ndev)
return -ENODEV; return -ENODEV;
} }
static Nic_device nic_device(ndev);
static Nic::Root nic_root(*_ep, Genode::env()->heap(), nic_device);
/*
* XXX This is just a starting point for removing all the static stuff from
* this file...
*/
ndev->lx_nic_device = (void *)&nic_device;
_nic = &nic_device;
already_registered = true; already_registered = true;
Root::instance->device = ndev;
ndev->state |= 1UL << __LINK_STATE_START; ndev->state |= 1UL << __LINK_STATE_START;
netif_carrier_off(ndev); netif_carrier_off(ndev);
@ -424,7 +531,7 @@ extern "C" int register_netdevice(struct net_device *ndev)
if (ndev->netdev_ops->ndo_set_rx_mode) if (ndev->netdev_ops->ndo_set_rx_mode)
ndev->netdev_ops->ndo_set_rx_mode(ndev); ndev->netdev_ops->ndo_set_rx_mode(ndev);
Genode::env()->parent()->announce(_ep->rpc_ep().manage(&nic_root)); Root::instance->announce();
list_add_tail_rcu(&ndev->dev_list, &init_net.dev_base_head); list_add_tail_rcu(&ndev->dev_list, &init_net.dev_base_head);
@ -451,9 +558,10 @@ extern "C" void netif_carrier_on(struct net_device *dev)
{ {
dev->state &= ~(1UL << __LINK_STATE_NOCARRIER); dev->state &= ~(1UL << __LINK_STATE_NOCARRIER);
Nic_device *nic = (Nic_device *)dev->lx_nic_device; Wifi_session_component *session = (Wifi_session_component *)dev->lx_nic_device;
nic->link_state(true); if (session)
session->link_state(true);
} }
@ -464,9 +572,10 @@ extern "C" void netif_carrier_off(struct net_device *dev)
dev->state |= 1UL << __LINK_STATE_NOCARRIER; dev->state |= 1UL << __LINK_STATE_NOCARRIER;
Nic_device *nic = (Nic_device *)dev->lx_nic_device; Wifi_session_component *session = (Wifi_session_component *)dev->lx_nic_device;
nic->link_state(false); if (session)
session->link_state(false);
} }
@ -481,14 +590,13 @@ extern "C" int netif_receive_skb(struct sk_buff *skb)
if (ntohs(skb->protocol) == ETH_P_PAE) { if (ntohs(skb->protocol) == ETH_P_PAE) {
/* XXX call only AF_PACKET hook */ /* XXX call only AF_PACKET hook */
for (Proto_hook* ph = proto_hook_list().first(); ph; ph = ph->next()) { for (Proto_hook* ph = proto_hook_list().first(); ph; ph = ph->next()) {
ph->pt.func(skb, _nic->_ndev, &ph->pt, _nic->_ndev); ph->pt.func(skb, Root::instance->device, &ph->pt, Root::instance->device);
} }
return NET_RX_SUCCESS; return NET_RX_SUCCESS;
} }
if (_nic && _nic->_session) { if (Root::instance->session)
_nic->rx(skb); Root::instance->session->receive(skb);
}
dev_kfree_skb(skb); dev_kfree_skb(skb);
return NET_RX_SUCCESS; return NET_RX_SUCCESS;
@ -567,12 +675,6 @@ extern "C" struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name
} }
/**********************
** linux/inerrupt.h **
**********************/
/************************* /*************************
** linux/etherdevice.h ** ** linux/etherdevice.h **
*************************/ *************************/

286
repos/os/include/nic/component.h
View File

@ -1,11 +1,12 @@
/* /*
* \brief Glue between device-specific NIC driver code and Genode * \brief Server::Entrypoint based NIC session component
* \author Norman Feske * \author Norman Feske
* \date 2011-05-21 * \author Sebastian Sumpf
* \date 2015-06-22
*/ */
/* /*
* Copyright (C) 2011-2013 Genode Labs GmbH * Copyright (C) 2015 Genode Labs GmbH
* *
* This file is part of the Genode OS framework, which is distributed * This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2. * under the terms of the GNU General Public License version 2.
@ -14,101 +15,64 @@
#ifndef _INCLUDE__NIC__COMPONENT_H_ #ifndef _INCLUDE__NIC__COMPONENT_H_
#define _INCLUDE__NIC__COMPONENT_H_ #define _INCLUDE__NIC__COMPONENT_H_
#include <base/env.h> #include <os/attached_ram_dataspace.h>
#include <os/server.h>
#include <nic/packet_allocator.h>
#include <nic_session/rpc_object.h> #include <nic_session/rpc_object.h>
#include <base/allocator_avl.h>
#include <util/arg_string.h>
#include <base/rpc_server.h>
#include <root/component.h>
#include <nic/driver.h>
enum { VERBOSE_RX = false };
namespace Nic { namespace Nic {
class Communication_buffers;
class Session_component; class Session_component;
/**
* Shortcut for single-client NIC root component
*/
typedef Genode::Root_component<Session_component, Genode::Single_client>
Root_component;
class Root;
} }
class Nic::Session_component : public Genode::Allocator_avl, class Nic::Communication_buffers
public Session_rpc_object, public Rx_buffer_alloc,
public Driver_notification
{ {
private: protected:
Driver_factory &_driver_factory; Nic::Packet_allocator _rx_packet_alloc;
Driver &_driver; Genode::Attached_ram_dataspace _tx_ds, _rx_ds;
Communication_buffers(Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Genode::size_t tx_size, Genode::size_t rx_size)
:
_rx_packet_alloc(&rx_block_md_alloc),
_tx_ds(&ram_session, tx_size),
_rx_ds(&ram_session, rx_size)
{ }
};
class Nic::Session_component : Communication_buffers, public Session_rpc_object
{
protected:
Server::Entrypoint &_ep;
Genode::Signal_context_capability _link_state_sigh; Genode::Signal_context_capability _link_state_sigh;
/* rx packet descriptor */
Genode::Packet_descriptor _curr_rx_packet;
enum { TX_STACK_SIZE = 8*1024 }; /**
class Tx_thread : public Genode::Thread<TX_STACK_SIZE> * Signal link-state change to client
*/
void _link_state_changed()
{ {
private: if (_link_state_sigh.valid())
Genode::Signal_transmitter(_link_state_sigh).submit();
Tx::Sink *_tx_sink;
Driver &_driver;
public:
Tx_thread(Tx::Sink *tx_sink, Driver &driver)
:
Genode::Thread<TX_STACK_SIZE>("tx"),
_tx_sink(tx_sink), _driver(driver)
{
start();
}
void entry()
{
using namespace Genode;
while (true) {
/* block for packet from client */
Packet_descriptor packet = _tx_sink->get_packet();
if (!packet.valid()) {
PWRN("received invalid packet");
continue;
}
_driver.tx(_tx_sink->packet_content(packet),
packet.size());
/* acknowledge packet to the client */
if (!_tx_sink->ready_to_ack())
PDBG("need to wait until ready-for-ack");
_tx_sink->acknowledge_packet(packet);
}
}
} _tx_thread;
void dump()
{
using namespace Genode;
if (!VERBOSE_RX) return;
char *buf = (char *)_rx.source()->packet_content(_curr_rx_packet);
size_t size = _curr_rx_packet.size();
printf("rx packet:");
for (unsigned i = 0; i < size; i++)
printf("%02x,", buf[i]);
printf("\n");
} }
/**
* Sub-classes must implement this function, it is called upon all
* packet-stream signals.
*/
virtual void _handle_packet_stream() = 0;
void _dispatch(unsigned) { _handle_packet_stream(); }
Genode::Signal_rpc_member<Session_component> _packet_stream_dispatcher {
_ep, *this, &Session_component::_dispatch };
public: public:
/** /**
@ -116,149 +80,47 @@ class Nic::Session_component : public Genode::Allocator_avl,
* *
* \param tx_buf_size buffer size for tx channel * \param tx_buf_size buffer size for tx channel
* \param rx_buf_size buffer size for rx channel * \param rx_buf_size buffer size for rx channel
* \param rx_block_alloc rx block allocator * \param rx_block_md_alloc backing store of the meta data of the
* rx block allocator
* \param ram_session RAM session to allocate tx and rx buffers
* \param ep entry point used for packet stream * \param ep entry point used for packet stream
* channels
*/ */
Session_component(Genode::size_t tx_buf_size, Session_component(Genode::size_t const tx_buf_size,
Genode::size_t rx_buf_size, Genode::size_t const rx_buf_size,
Nic::Driver_factory &driver_factory, Genode::Allocator &rx_block_md_alloc,
Genode::Rpc_entrypoint &ep) Genode::Ram_session &ram_session,
Server::Entrypoint &ep)
: :
Genode::Allocator_avl(Genode::env()->heap()), Communication_buffers(rx_block_md_alloc, ram_session,
Session_rpc_object(Genode::env()->ram_session()->alloc(tx_buf_size), tx_buf_size, rx_buf_size),
Genode::env()->ram_session()->alloc(rx_buf_size), Session_rpc_object(_tx_ds.cap(),
static_cast<Genode::Range_allocator *>(this), ep), _rx_ds.cap(),
_driver_factory(driver_factory), &_rx_packet_alloc, ep.rpc_ep()),
_driver(*driver_factory.create(*this, *this)), _ep(ep)
_tx_thread(_tx.sink(), _driver)
{ }
/**
* Destructor
*/
~Session_component()
{ {
_driver_factory.destroy(&_driver); /* install data-flow signal handlers for both packet streams */
_tx.sigh_ready_to_ack(_packet_stream_dispatcher);
_tx.sigh_packet_avail(_packet_stream_dispatcher);
_rx.sigh_ready_to_submit(_packet_stream_dispatcher);
_rx.sigh_ack_avail(_packet_stream_dispatcher);
} }
/*********************************** void link_state_sigh(Genode::Signal_context_capability sigh)
** Driver-notification interface **
***********************************/
void link_state_changed() override
{
if (_link_state_sigh.valid())
Genode::Signal_transmitter(_link_state_sigh).submit();
}
/*******************************
** Rx_buffer_alloc interface **
*******************************/
void *alloc(Genode::size_t size) override
{
/* assign rx packet descriptor */
_curr_rx_packet = _rx.source()->alloc_packet(size);
return _rx.source()->packet_content(_curr_rx_packet);
}
void submit() override
{
/* check for acknowledgements from the client */
while (_rx.source()->ack_avail()) {
Genode::Packet_descriptor packet = _rx.source()->get_acked_packet();
/* free packet buffer */
_rx.source()->release_packet(packet);
}
dump();
_rx.source()->submit_packet(_curr_rx_packet);
/* invalidate rx packet descriptor */
_curr_rx_packet = Packet_descriptor();
}
/****************************
** Nic::Session interface **
****************************/
Mac_address mac_address() { return _driver.mac_address(); }
bool link_state() { return _driver.link_state(); }
Tx::Sink* tx_sink() { return _tx.sink(); }
Rx::Source* rx_source() { return _rx.source(); }
void link_state_sigh(Genode::Signal_context_capability sigh) override
{ {
_link_state_sigh = sigh; _link_state_sigh = sigh;
} }
};
/**
/* * Return the current link state
* Root component, handling new session requests.
*/
class Nic::Root : public Root_component
{
private:
Driver_factory &_driver_factory;
Genode::Rpc_entrypoint &_ep;
protected:
/*
* Always returns the singleton nic-session component.
*/ */
Session_component *_create_session(const char *args) virtual bool link_state() = 0;
{
using namespace Genode;
Genode::size_t ram_quota = /**
Arg_string::find_arg(args, "ram_quota" ).ulong_value(0); * Return the MAC address of the device
Genode::size_t tx_buf_size = */
Arg_string::find_arg(args, "tx_buf_size").ulong_value(0); virtual Mac_address mac_address() = 0;
Genode::size_t rx_buf_size =
Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
/* delete ram quota by the memory needed for the session */
Genode::size_t session_size = max((Genode::size_t)4096, sizeof(Session_component)
+ sizeof(Allocator_avl));
if (ram_quota < session_size)
throw Root::Quota_exceeded();
/*
* Check if donated ram quota suffices for both
* communication buffers. Also check both sizes separately
* to handle a possible overflow of the sum of both sizes.
*/
if (tx_buf_size > ram_quota - session_size
|| rx_buf_size > ram_quota - session_size
|| tx_buf_size + rx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + rx_buf_size + session_size);
throw Root::Quota_exceeded();
}
return new (md_alloc()) Session_component(tx_buf_size,
rx_buf_size,
_driver_factory,
_ep);
}
public:
Root(Genode::Rpc_entrypoint *session_ep,
Genode::Allocator *md_alloc,
Nic::Driver_factory &driver_factory)
:
Root_component(session_ep, md_alloc),
_driver_factory(driver_factory),
_ep(*session_ep)
{ }
}; };
#endif /* _INCLUDE__NIC__COMPONENT_H_ */ #endif /* _INCLUDE__NIC__COMPONENT_H_ */

109
repos/os/include/nic/driver.h
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@ -1,109 +0,0 @@
/*
* \brief Interfaces used internally in NIC drivers
* \author Norman Feske
* \date 2011-05-21
*/
/*
* 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__NIC__DRIVER_H_
#define _INCLUDE__NIC__DRIVER_H_
#include <os/irq_activation.h> /* for 'Genode::Irq_handler' type */
#include <nic_session/nic_session.h> /* for 'Nic::Mac_address' type */
namespace Nic {
struct Rx_buffer_alloc;
struct Driver;
struct Driver_factory;
struct Driver_notification;
}
/**
* Interface for allocating the backing store for incoming packets
*/
struct Nic::Rx_buffer_alloc
{
/**
* Allocate packet buffer
*/
virtual void *alloc(Genode::size_t) = 0;
/**
* Submit packet to client
*/
virtual void submit() = 0;
};
/**
* Interface for driver-to-component notifications
*/
struct Nic::Driver_notification { virtual void link_state_changed() = 0; };
/**
* Interface to be implemented by the device-specific driver code
*/
struct Nic::Driver : Genode::Irq_handler
{
/**
* Return MAC address of the network interface
*/
virtual Mac_address mac_address() = 0;
/**
* Return link state (true if link detected)
*/
virtual bool link_state() = 0;
/**
* Transmit packet
*
* \param packet start of packet
* \param size packet size
*
* If the packet size is not a multiple of 4 bytes, this method
* accesses the bytes after the packet buffer up to the next 4-byte
* length (in the worst case, 3 bytes after the packet end).
*/
virtual void tx(char const *packet, Genode::size_t size) = 0;
};
/**
* Interface for constructing the driver object
*
* The driver object requires an rx-packet allocator at construction time.
* This allocator, however, exists not before the creation of a NIC session
* because the client pays for it. Therefore, the driver must be created at
* session-construction time. Because drivers may differ with regard to
* their constructor arguments, the 'Driver_factory' interface allows for
* unifying the session-creation among these drivers.
*/
struct Nic::Driver_factory
{
/**
* Construct new driver
*
* \param rx_buffer_alloc buffer allocator used for storing incoming
* packets
* \param notifier callback for notifications
*/
virtual Driver *create(Rx_buffer_alloc &rx_buffer_alloc,
Driver_notification &notify) = 0;
/**
* Destroy driver
*/
virtual void destroy(Driver *driver) = 0;
};
#endif /* _INCLUDE__NIC__DRIVER_H_ */

77
repos/os/include/nic/root.h Normal file
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@ -0,0 +1,77 @@
/**
* \brief Simple single client NIC Root
* \author Sebastian Sumpf
* \date 2015-06-23
*/
/*
* Copyright (C) 2015 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__NIC__ROOT_H_
#define _INCLUDE__NIC__ROOT_H_
#include <nic/component.h>
#include <root/component.h>
namespace Nic {
template <class SESSION_COMPONENT> class Root;
};
template <class SESSION_COMPONENT>
class Nic::Root : public Genode::Root_component<SESSION_COMPONENT,
Genode::Single_client>
{
private:
Server::Entrypoint &_ep;
protected:
SESSION_COMPONENT *_create_session(const char *args)
{
using namespace Genode;
size_t ram_quota = Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
size_t tx_buf_size = Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
size_t rx_buf_size = Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
/* deplete ram quota by the memory needed for the session structure */
size_t session_size = max(4096UL, (unsigned long)sizeof(SESSION_COMPONENT));
if (ram_quota < session_size)
throw Genode::Root::Quota_exceeded();
/*
* Check if donated ram quota suffices for both communication
* buffers. Also check both sizes separately to handle a
* possible overflow of the sum of both sizes.
*/
if (tx_buf_size > ram_quota - session_size
|| rx_buf_size > ram_quota - session_size
|| tx_buf_size + rx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + rx_buf_size + session_size);
throw Genode::Root::Quota_exceeded();
}
return new (Root::md_alloc())
SESSION_COMPONENT(tx_buf_size, rx_buf_size,
*env()->heap(),
*env()->ram_session(),
_ep);
}
public:
Root(Server::Entrypoint &ep, Genode::Allocator &md_alloc)
: Genode::Root_component<SESSION_COMPONENT, Genode::Single_client>(&ep.rpc_ep(), &md_alloc),
_ep(ep)
{ }
};
#endif /* _INCLUDE__NIC__ROOT_H_ */

139
repos/os/src/drivers/nic/lan9118/lan9118.h
View File

@ -19,9 +19,10 @@
#include <os/attached_io_mem_dataspace.h> #include <os/attached_io_mem_dataspace.h>
#include <os/irq_activation.h> #include <os/irq_activation.h>
#include <timer_session/connection.h> #include <timer_session/connection.h>
#include <nic/driver.h> #include <nic/component.h>
class Lan9118 : public Nic::Driver class Lan9118 : public Nic::Session_component,
public Genode::Irq_handler
{ {
private: private:
@ -70,9 +71,7 @@ class Lan9118 : public Nic::Driver
Genode::Attached_io_mem_dataspace _mmio; Genode::Attached_io_mem_dataspace _mmio;
volatile Genode::uint32_t *_reg_base; volatile Genode::uint32_t *_reg_base;
Timer::Connection _timer; Timer::Connection _timer;
Nic::Rx_buffer_alloc &_rx_buffer_alloc;
Nic::Mac_address _mac_addr; Nic::Mac_address _mac_addr;
Nic::Driver_notification &_notify;
enum { IRQ_STACK_SIZE = 4096 }; enum { IRQ_STACK_SIZE = 4096 };
Genode::Irq_activation _irq_activation; Genode::Irq_activation _irq_activation;
@ -189,6 +188,67 @@ class Lan9118 : public Nic::Driver
return _reg_read(RX_FIFO_INF) & 0xffff; return _reg_read(RX_FIFO_INF) & 0xffff;
} }
protected:
bool _send()
{
if (!_tx.sink()->ready_to_ack())
return false;
if (!_tx.sink()->packet_avail())
return false;
Genode::Packet_descriptor packet = _tx.sink()->get_packet();
if (!packet.valid()) {
PWRN("Invalid tx packet");
return true;
}
/* limit size to 11 bits, the maximum supported by lan9118 */
enum { MAX_PACKET_SIZE_LOG2 = 11 };
Genode::size_t const max_size = (1 << MAX_PACKET_SIZE_LOG2) - 1;
if (packet.size() > max_size) {
PERR("packet size %zd too large, limit is %zd", packet.size(), max_size);
return true;
}
enum { FIRST_SEG = (1 << 13),
LAST_SEG = (1 << 12) };
Genode::uint32_t const cmd_a = packet.size() | FIRST_SEG | LAST_SEG,
cmd_b = packet.size();
unsigned count = Genode::align_addr(packet.size(), 2) >> 2;
Genode::uint32_t *src = (Genode::uint32_t *)_tx.sink()->packet_content(packet);
/* check space left in tx data fifo */
Genode::size_t const fifo_avail = _reg_read(TX_FIFO_INF) & 0xffff;
if (fifo_avail < count*4 + sizeof(cmd_a) + sizeof(cmd_b)) {
PERR("tx fifo overrun, ignore packet");
_tx.sink()->acknowledge_packet(packet);
return false;
}
_reg_write(TX_DATA_FIFO, cmd_a);
_reg_write(TX_DATA_FIFO, cmd_b);
/* supply payload to transmit fifo */
for (; count--; src++)
_reg_write(TX_DATA_FIFO, *src);
_tx.sink()->acknowledge_packet(packet);
return true;
}
void _handle_packet_stream() override
{
while (_rx.source()->ack_avail())
_rx.source()->release_packet(_rx.source()->get_acked_packet());
while (_send()) ;
}
public: public:
/** /**
@ -202,13 +262,14 @@ class Lan9118 : public Nic::Driver
* \throw Device_not_supported * \throw Device_not_supported
*/ */
Lan9118(Genode::addr_t mmio_base, Genode::size_t mmio_size, int irq, Lan9118(Genode::addr_t mmio_base, Genode::size_t mmio_size, int irq,
Nic::Rx_buffer_alloc &rx_buffer_alloc, Genode::size_t const tx_buf_size,
Nic::Driver_notification &notify) Genode::size_t const rx_buf_size,
: Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Server::Entrypoint &ep)
: Session_component(tx_buf_size, rx_buf_size, rx_block_md_alloc, ram_session, ep),
_mmio(mmio_base, mmio_size), _mmio(mmio_base, mmio_size),
_reg_base(_mmio.local_addr<Genode::uint32_t>()), _reg_base(_mmio.local_addr<Genode::uint32_t>()),
_rx_buffer_alloc(rx_buffer_alloc),
_notify(notify),
_irq_activation(irq, *this, IRQ_STACK_SIZE) _irq_activation(irq, *this, IRQ_STACK_SIZE)
{ {
unsigned long const id_rev = _reg_read(ID_REV), unsigned long const id_rev = _reg_read(ID_REV),
@ -290,58 +351,21 @@ class Lan9118 : public Nic::Driver
_mac_csr_write(MAC_CR, 0); _mac_csr_write(MAC_CR, 0);
} }
void link_state_changed() { _notify.link_state_changed(); } /**************************************
** Nic::Session_component interface **
**************************************/
Nic::Mac_address mac_address() override
/***************************
** Nic::Driver interface **
***************************/
Nic::Mac_address mac_address()
{ {
return _mac_addr; return _mac_addr;
} }
bool link_state() bool link_state() override
{ {
/* XXX always return true for now */ /* XXX always return true for now */
return true; return true;
} }
void tx(char const *packet, Genode::size_t size)
{
/* limit size to 11 bits, the maximum supported by lan9118 */
enum { MAX_PACKET_SIZE_LOG2 = 11 };
Genode::size_t const max_size = (1 << MAX_PACKET_SIZE_LOG2) - 1;
if (size > max_size) {
PERR("packet size %zd too large, limit is %zd", size, max_size);
return;
}
enum { FIRST_SEG = (1 << 13),
LAST_SEG = (1 << 12) };
Genode::uint32_t const cmd_a = size | FIRST_SEG | LAST_SEG,
cmd_b = size;
unsigned count = Genode::align_addr(size, 2) >> 2;
Genode::uint32_t *src = (Genode::uint32_t *)packet;
/* check space left in tx data fifo */
Genode::size_t const fifo_avail = _reg_read(TX_FIFO_INF) & 0xffff;
if (fifo_avail < count*4 + sizeof(cmd_a) + sizeof(cmd_b)) {
PERR("tx fifo overrun, ignore packet");
return;
}
_reg_write(TX_DATA_FIFO, cmd_a);
_reg_write(TX_DATA_FIFO, cmd_b);
/* supply payload to transmit fifo */
for (; count--; src++)
_reg_write(TX_DATA_FIFO, *src);
}
/****************************** /******************************
** Irq_activation interface ** ** Irq_activation interface **
@ -351,7 +375,9 @@ class Lan9118 : public Nic::Driver
{ {
using namespace Genode; using namespace Genode;
while (_rx_packet_avail()) { _handle_packet_stream();
while (_rx_packet_avail() && _rx.source()->ready_to_submit()) {
/* read packet from NIC, copy to client buffer */ /* read packet from NIC, copy to client buffer */
Rx_packet_info packet = _rx_packet_info(); Rx_packet_info packet = _rx_packet_info();
@ -360,7 +386,12 @@ class Lan9118 : public Nic::Driver
size_t const size = align_addr(packet.size, 2); size_t const size = align_addr(packet.size, 2);
/* allocate rx packet buffer */ /* allocate rx packet buffer */
uint32_t *dst = (uint32_t *)_rx_buffer_alloc.alloc(size); Nic::Packet_descriptor p;
try {
p = _rx.source()->alloc_packet(size);
} catch (Session::Rx::Source::Packet_alloc_failed) { return; }
uint32_t *dst = (uint32_t *)_rx.source()->packet_content(p);
/* calculate number of words to be read from rx fifo */ /* calculate number of words to be read from rx fifo */
size_t count = min(size, _rx_data_pending()) >> 2; size_t count = min(size, _rx_data_pending()) >> 2;
@ -369,7 +400,7 @@ class Lan9118 : public Nic::Driver
for (; count--; ) for (; count--; )
*dst++ = _reg_read(RX_DATA_FIFO); *dst++ = _reg_read(RX_DATA_FIFO);
_rx_buffer_alloc.submit(); _rx.source()->submit_packet(p);
} }
/* acknowledge all pending irqs */ /* acknowledge all pending irqs */

93
repos/os/src/drivers/nic/lan9118/main.cc
View File

@ -18,6 +18,8 @@
#include <base/sleep.h> #include <base/sleep.h>
#include <cap_session/connection.h> #include <cap_session/connection.h>
#include <nic/component.h> #include <nic/component.h>
#include <os/server.h>
#include <root/component.h>
/* device definitions */ /* device definitions */
#include <lan9118_defs.h> #include <lan9118_defs.h>
@ -25,39 +27,80 @@
/* driver code */ /* driver code */
#include <lan9118.h> #include <lan9118.h>
namespace Server { struct Main; }
int main(int, char **) class Root : public Genode::Root_component<Lan9118, Genode::Single_client>
{ {
using namespace Genode; private:
printf("--- LAN9118 NIC driver started ---\n"); Server::Entrypoint &_ep;
/** protected:
* Factory used by 'Nic::Root' at session creation/destruction time
*/ Lan9118 *_create_session(const char *args)
struct Lan9118_driver_factory : Nic::Driver_factory {
using namespace Genode;
size_t ram_quota = Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
size_t tx_buf_size = Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
size_t rx_buf_size = Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
/* deplete ram quota by the memory needed for the session structure */
size_t session_size = max(4096UL, (unsigned long)sizeof(Lan9118));
if (ram_quota < session_size)
throw Genode::Root::Quota_exceeded();
/*
* Check if donated ram quota suffices for both communication
* buffers. Also check both sizes separately to handle a
* possible overflow of the sum of both sizes.
*/
if (tx_buf_size > ram_quota - session_size
|| rx_buf_size > ram_quota - session_size
|| tx_buf_size + rx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + rx_buf_size + session_size);
throw Genode::Root::Quota_exceeded();
}
return new (Root::md_alloc())
Lan9118(LAN9118_PHYS, LAN9118_SIZE, LAN9118_IRQ,
tx_buf_size, rx_buf_size,
*env()->heap(),
*env()->ram_session(),
_ep);
}
public:
Root(Server::Entrypoint &ep, Genode::Allocator &md_alloc)
: Genode::Root_component<Lan9118, Genode::Single_client>(&ep.rpc_ep(), &md_alloc),
_ep(ep)
{ }
};
struct Server::Main
{
Entrypoint &ep;
::Root nic_root{ ep, *Genode::env()->heap() };
Main(Entrypoint &ep) : ep(ep)
{ {
Nic::Driver *create(Nic::Rx_buffer_alloc &alloc, printf("--- LAN9118 NIC driver started ---\n");
Nic::Driver_notification &notify) Genode::env()->parent()->announce(ep.manage(nic_root));
{ }
return new (env()->heap()) };
Lan9118(LAN9118_PHYS, LAN9118_SIZE, LAN9118_IRQ, alloc, notify);
}
void destroy(Nic::Driver *driver)
{
Genode::destroy(env()->heap(), static_cast<Lan9118 *>(driver));
}
} driver_factory; namespace Server {
enum { STACK_SIZE = 4096 }; char const *name() { return "nic_ep"; }
static Cap_connection cap;
static Rpc_entrypoint ep(&cap, STACK_SIZE, "nic_ep");
static Nic::Root nic_root(&ep, env()->heap(), driver_factory); size_t stack_size() { return 2*1024*sizeof(long); }
env()->parent()->announce(ep.manage(&nic_root));
Genode::sleep_forever(); void construct(Entrypoint &ep)
return 0; {
static Main main(ep);
}
} }

2
repos/os/src/drivers/nic/lan9118/target.mk
View File

@ -1,5 +1,5 @@
REQUIRES = lan9118 REQUIRES = lan9118
TARGET = nic_drv TARGET = nic_drv
SRC_CC = main.cc SRC_CC = main.cc
LIBS = base LIBS = base server
INC_DIR += $(PRG_DIR) INC_DIR += $(PRG_DIR)

214
repos/os/src/drivers/nic/linux/main.cc
View File

@ -2,6 +2,7 @@
* \brief NIC driver for Linux TUN/TAP device * \brief NIC driver for Linux TUN/TAP device
* \author Stefan Kalkowski * \author Stefan Kalkowski
* \author Christian Helmuth * \author Christian Helmuth
* \author Sebastian Sumpf
* \date 2011-08-08 * \date 2011-08-08
* *
* Configuration options are: * Configuration options are:
@ -23,9 +24,8 @@
*/ */
/* Genode */ /* Genode */
#include <base/sleep.h> #include <base/thread.h>
#include <cap_session/connection.h> #include <nic/root.h>
#include <nic/component.h>
#include <nic/xml_node.h> #include <nic/xml_node.h>
#include <os/config.h> #include <os/config.h>
@ -37,18 +37,20 @@
#include <net/if.h> #include <net/if.h>
#include <linux/if_tun.h> #include <linux/if_tun.h>
namespace Server { struct Main; }
class Linux_driver : public Nic::Driver
class Linux_session_component : public Nic::Session_component
{ {
private: private:
struct Rx_thread : Genode::Thread<0x2000> struct Rx_signal_thread : Genode::Thread<0x1000>
{ {
int fd; int fd;
Nic::Driver &driver; Genode::Signal_context_capability sigh;
Rx_thread(int fd, Nic::Driver &driver) Rx_signal_thread(int fd, Genode::Signal_context_capability sigh)
: Genode::Thread<0x2000>("rx"), fd(fd), driver(driver) { } : Genode::Thread<0x1000>("rx_signal"), fd(fd), sigh(sigh) { }
void entry() void entry()
{ {
@ -61,19 +63,15 @@ class Linux_driver : public Nic::Driver
FD_SET(fd, &rfds); FD_SET(fd, &rfds);
do { ret = select(fd + 1, &rfds, 0, 0, 0); } while (ret < 0); do { ret = select(fd + 1, &rfds, 0, 0, 0); } while (ret < 0);
/* inform driver about incoming packet */ /* signal incoming packet */
driver.handle_irq(fd); Genode::Signal_transmitter(sigh).submit();
} }
} }
}; };
Nic::Mac_address _mac_addr; Nic::Mac_address _mac_addr;
Nic::Rx_buffer_alloc &_alloc; int _tap_fd;
Nic::Driver_notification &_notify; Rx_signal_thread _rx_thread;
char _packet_buffer[1514]; /* maximum ethernet packet length */
int _tap_fd;
Rx_thread _rx_thread;
int _setup_tap_fd() int _setup_tap_fd()
{ {
@ -88,6 +86,12 @@ class Linux_driver : public Nic::Driver
throw Genode::Exception(); throw Genode::Exception();
} }
/* set fd to non-blocking */
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
PERR("could not set /dev/net/tun to non-blocking");
throw Genode::Exception();
}
Genode::memset(&ifr, 0, sizeof(ifr)); Genode::memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI; ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
@ -113,13 +117,85 @@ class Linux_driver : public Nic::Driver
return fd; return fd;
} }
bool _send()
{
using namespace Genode;
if (!_tx.sink()->ready_to_ack())
return false;
if (!_tx.sink()->packet_avail())
return false;
Packet_descriptor packet = _tx.sink()->get_packet();
if (!packet.valid()) {
PWRN("Invalid tx packet");
return true;
}
int ret;
/* non-blocking-write packet to TAP */
do {
ret = write(_tap_fd, _tx.sink()->packet_content(packet), packet.size());
/* drop packet if write would block */
if (ret < 0 && errno == EAGAIN)
continue;
if (ret < 0) PERR("write: errno=%d", errno);
} while (ret < 0);
_tx.sink()->acknowledge_packet(packet);
return true;
}
bool _receive()
{
unsigned const max_size = Nic::Packet_allocator::DEFAULT_PACKET_SIZE;
if (!_rx.source()->ready_to_submit())
return false;
Nic::Packet_descriptor p;
try {
p = _rx.source()->alloc_packet(max_size);
} catch (Session::Rx::Source::Packet_alloc_failed) { return false; }
int size = read(_tap_fd, _rx.source()->packet_content(p), max_size);
if (size <= 0) {
_rx.source()->release_packet(p);
return false;
}
/* adjust packet size */
Nic::Packet_descriptor p_adjust(p.offset(), size);
_rx.source()->submit_packet(p_adjust);
return true;
}
protected:
void _handle_packet_stream() override
{
while (_rx.source()->ack_avail())
_rx.source()->release_packet(_rx.source()->get_acked_packet());
while (_send()) ;
while (_receive()) ;
}
public: public:
Linux_driver(Nic::Rx_buffer_alloc &alloc, Linux_session_component(Genode::size_t const tx_buf_size,
Nic::Driver_notification &notify) Genode::size_t const rx_buf_size,
Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Server::Entrypoint &ep)
: :
_alloc(alloc), _notify(notify), Session_component(tx_buf_size, rx_buf_size, rx_block_md_alloc, ram_session, ep),
_tap_fd(_setup_tap_fd()), _rx_thread(_tap_fd, *this) _tap_fd(_setup_tap_fd()), _rx_thread(_tap_fd, _packet_stream_dispatcher)
{ {
/* try using configured MAC address */ /* try using configured MAC address */
try { try {
@ -145,93 +221,23 @@ class Linux_driver : public Nic::Driver
_rx_thread.start(); _rx_thread.start();
} }
void link_state_changed() { _notify.link_state_changed(); } bool link_state() override { return true; }
Nic::Mac_address mac_address() override { return _mac_addr; }
/***************************
** Nic::Driver interface **
***************************/
Nic::Mac_address mac_address() { return _mac_addr; }
bool link_state()
{
/* XXX return always true for now */
return true;
}
void tx(char const *packet, Genode::size_t size)
{
int ret;
/* blocking-write packet to TAP */
do {
ret = write(_tap_fd, packet, size);
if (ret < 0) PERR("write: errno=%d", errno);
} while (ret < 0);
}
/******************************
** Irq_activation interface **
******************************/
void handle_irq(int)
{
int ret;
/* blocking read incoming packet */
do {
ret = read(_tap_fd, _packet_buffer, sizeof(_packet_buffer));
if (ret < 0) PERR("read: errno=%d", errno);
} while (ret < 0);
void *buffer = _alloc.alloc(ret);
Genode::memcpy(buffer, _packet_buffer, ret);
_alloc.submit();
}
}; };
/* struct Server::Main
* Manually initialize the 'lx_environ' pointer, needed because 'nic_drv' is not
* using the normal Genode startup code.
*/
extern char **environ;
char **lx_environ = environ;
int main(int, char **)
{ {
using namespace Genode; Entrypoint &ep;
Nic::Root<Linux_session_component> nic_root{ ep, *Genode::env()->heap() };
printf("--- Linux/tap NIC driver started ---\n"); Main(Entrypoint &ep) : ep(ep)
/**
* Factory used by 'Nic::Root' at session creation/destruction time
*/
struct Linux_driver_factory : Nic::Driver_factory
{ {
Nic::Driver *create(Nic::Rx_buffer_alloc &alloc, Genode::env()->parent()->announce(ep.manage(nic_root));
Nic::Driver_notification &notify) }
{ };
return new (env()->heap()) Linux_driver(alloc, notify);
}
void destroy(Nic::Driver *driver)
{
Genode::destroy(env()->heap(), static_cast<Linux_driver *>(driver));
}
} driver_factory;
enum { STACK_SIZE = 2*4096 };
static Cap_connection cap;
static Rpc_entrypoint ep(&cap, STACK_SIZE, "nic_ep");
static Nic::Root nic_root(&ep, env()->heap(), driver_factory);
env()->parent()->announce(ep.manage(&nic_root));
sleep_forever();
return 0;
}
char const * Server::name() { return "nic_ep"; }
size_t Server::stack_size() { return 2*1024*sizeof(long); }
void Server::construct(Entrypoint &ep) { static Main main(ep); }

2
repos/os/src/drivers/nic/linux/target.mk
View File

@ -1,4 +1,4 @@
TARGET = nic_drv TARGET = nic_drv
REQUIRES = linux REQUIRES = linux
LIBS = lx_hybrid config LIBS = lx_hybrid config server
SRC_CC = main.cc SRC_CC = main.cc

105
repos/os/src/server/nic_loopback/main.cc
View File

@ -15,19 +15,16 @@
#include <base/env.h> #include <base/env.h>
#include <base/sleep.h> #include <base/sleep.h>
#include <os/attached_ram_dataspace.h>
#include <os/server.h> #include <os/server.h>
#include <os/signal_rpc_dispatcher.h>
#include <root/component.h> #include <root/component.h>
#include <util/arg_string.h> #include <util/arg_string.h>
#include <util/misc_math.h> #include <util/misc_math.h>
#include <nic_session/rpc_object.h> #include <nic/component.h>
#include <nic_session/client.h> #include <nic/packet_allocator.h>
namespace Nic { namespace Nic {
class Communication_buffers; class Loopback_component;
class Session_component;
class Root; class Root;
} }
@ -35,36 +32,8 @@ namespace Nic {
namespace Server { struct Main; } namespace Server { struct Main; }
class Nic::Communication_buffers class Nic::Loopback_component : public Nic::Session_component
{ {
protected:
Genode::Allocator_avl _rx_packet_alloc;
Genode::Attached_ram_dataspace _tx_ds, _rx_ds;
Communication_buffers(Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Genode::size_t tx_size, Genode::size_t rx_size)
:
_rx_packet_alloc(&rx_block_md_alloc),
_tx_ds(&ram_session, tx_size),
_rx_ds(&ram_session, rx_size)
{ }
};
class Nic::Session_component : Communication_buffers, public Session_rpc_object
{
private:
Server::Entrypoint &_ep;
void _handle_packet_stream(unsigned);
Genode::Signal_rpc_member<Session_component> _packet_stream_dispatcher {
_ep, *this, &Session_component::_handle_packet_stream };
public: public:
/** /**
@ -78,46 +47,37 @@ class Nic::Session_component : Communication_buffers, public Session_rpc_object
* \param ep entry point used for packet stream * \param ep entry point used for packet stream
* channels * channels
*/ */
Session_component(Genode::size_t const tx_buf_size, Loopback_component(Genode::size_t const tx_buf_size,
Genode::size_t const rx_buf_size, Genode::size_t const rx_buf_size,
Genode::Allocator &rx_block_md_alloc, Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session, Genode::Ram_session &ram_session,
Server::Entrypoint &ep) Server::Entrypoint &ep)
: : Session_component(tx_buf_size, rx_buf_size,
Communication_buffers(rx_block_md_alloc, ram_session, rx_block_md_alloc, ram_session, ep)
tx_buf_size, rx_buf_size), { }
Session_rpc_object(this->_tx_ds.cap(),
this->_rx_ds.cap(),
&this->_rx_packet_alloc, ep.rpc_ep()),
_ep(ep)
{
/* install data-flow signal handlers for both packet streams */
_tx.sigh_ready_to_ack(_packet_stream_dispatcher);
_tx.sigh_packet_avail(_packet_stream_dispatcher);
_rx.sigh_ready_to_submit(_packet_stream_dispatcher);
_rx.sigh_ack_avail(_packet_stream_dispatcher);
}
Mac_address mac_address() Mac_address mac_address() override
{ {
Mac_address result = {{1,2,3,4,5,6}}; Mac_address result = {{1,2,3,4,5,6}};
return result; return result;
} }
bool link_state() bool link_state() override
{ {
/* XXX always return true, for now */ /* XXX always return true, for now */
return true; return true;
} }
void link_state_sigh(Genode::Signal_context_capability sigh) { } void _handle_packet_stream() override;
}; };
void Nic::Session_component::_handle_packet_stream(unsigned) void Nic::Loopback_component::_handle_packet_stream()
{ {
using namespace Genode; using namespace Genode;
unsigned const alloc_size = Nic::Packet_allocator::DEFAULT_PACKET_SIZE;
/* loop unless we cannot make any progress */ /* loop unless we cannot make any progress */
for (;;) { for (;;) {
@ -154,35 +114,36 @@ void Nic::Session_component::_handle_packet_stream(unsigned)
* We are safe to process one packet without blocking. * We are safe to process one packet without blocking.
*/ */
Packet_descriptor packet_to_client;
try {
packet_to_client = _rx.source()->alloc_packet(alloc_size);
} catch (Session::Rx::Source::Packet_alloc_failed) {
continue;
}
/* obtain packet */ /* obtain packet */
Packet_descriptor const packet_from_client = _tx.sink()->get_packet(); Packet_descriptor const packet_from_client = _tx.sink()->get_packet();
if (!packet_from_client.valid()) { if (!packet_from_client.valid()) {
PWRN("received invalid packet"); PWRN("received invalid packet");
_rx.source()->release_packet(packet_to_client);
continue; continue;
} }
try {
size_t const packet_size = packet_from_client.size();
Packet_descriptor const packet_to_client =
_rx.source()->alloc_packet(packet_size);
Genode::memcpy(_rx.source()->packet_content(packet_to_client), Genode::memcpy(_rx.source()->packet_content(packet_to_client),
_tx.sink()->packet_content(packet_from_client), _tx.sink()->packet_content(packet_from_client),
packet_size); packet_from_client.size());
packet_to_client = Packet_descriptor(packet_to_client.offset(), packet_from_client.size());
_rx.source()->submit_packet(packet_to_client); _rx.source()->submit_packet(packet_to_client);
} catch (Session::Rx::Source::Packet_alloc_failed) {
PWRN("transmit packet allocation failed, drop packet");
}
_tx.sink()->acknowledge_packet(packet_from_client); _tx.sink()->acknowledge_packet(packet_from_client);
} }
} }
class Nic::Root : public Genode::Root_component<Session_component> class Nic::Root : public Genode::Root_component<Loopback_component>
{ {
private: private:
@ -190,7 +151,7 @@ class Nic::Root : public Genode::Root_component<Session_component>
protected: protected:
Session_component *_create_session(const char *args) Loopback_component*_create_session(const char *args)
{ {
using namespace Genode; using namespace Genode;
@ -216,7 +177,7 @@ class Nic::Root : public Genode::Root_component<Session_component>
throw Root::Quota_exceeded(); throw Root::Quota_exceeded();
} }
return new (md_alloc()) Session_component(tx_buf_size, rx_buf_size, return new (md_alloc()) Loopback_component(tx_buf_size, rx_buf_size,
*env()->heap(), *env()->heap(),
*env()->ram_session(), *env()->ram_session(),
_ep); _ep);
@ -226,7 +187,7 @@ class Nic::Root : public Genode::Root_component<Session_component>
Root(Server::Entrypoint &ep, Genode::Allocator &md_alloc) Root(Server::Entrypoint &ep, Genode::Allocator &md_alloc)
: :
Genode::Root_component<Session_component>(&ep.rpc_ep(), &md_alloc), Genode::Root_component<Loopback_component>(&ep.rpc_ep(), &md_alloc),
_ep(ep) _ep(ep)
{ } { }
}; };

194
repos/ports/src/app/openvpn/main.cc
View File

@ -82,14 +82,12 @@ Tuntap_device *tuntap_dev()
** Implementation of the Nic service ** ** Implementation of the Nic service **
***************************************/ ***************************************/
class Nic_driver : public Tuntap_device, class Openvpn_component : public Tuntap_device,
public Nic::Driver public Nic::Session_component
{ {
private: private:
Nic::Mac_address _mac_addr {{ 0x02, 0x00, 0x00, 0x00, 0x00, 0x01 }}; Nic::Mac_address _mac_addr {{ 0x02, 0x00, 0x00, 0x00, 0x00, 0x01 }};
Nic::Rx_buffer_alloc &_alloc;
Nic::Driver_notification &_notify;
char const *_packet; char const *_packet;
@ -99,12 +97,52 @@ class Nic_driver : public Tuntap_device,
Genode::Semaphore _startup_lock; Genode::Semaphore _startup_lock;
Genode::Semaphore _tx_lock; Genode::Semaphore _tx_lock;
protected:
bool _send()
{
using namespace Genode;
if (!_tx.sink()->ready_to_ack())
return false;
if (!_tx.sink()->packet_avail())
return false;
Packet_descriptor packet = _tx.sink()->get_packet();
if (!packet.valid()) {
PWRN("Invalid tx packet");
return true;
}
_packet = _tx.sink()->packet_content(packet);
/* notify openvpn */
::write(_pipefd[WRITE], "1", 1);
/* block while openvpn handles the packet */
_tx_lock.down();
_tx.sink()->acknowledge_packet(packet);
return true;
}
void _handle_packet_stream() override
{
while (_rx.source()->ack_avail())
_rx.source()->release_packet(_rx.source()->get_acked_packet());
while (_send()) ;
}
public: public:
Nic_driver(Nic::Rx_buffer_alloc &alloc, Nic::Driver_notification &notify) Openvpn_component(Genode::size_t const tx_buf_size,
: Genode::size_t const rx_buf_size,
_alloc(alloc), _notify(notify), _packet(0) Genode::Allocator &rx_block_md_alloc,
Genode::Ram_session &ram_session,
Server::Entrypoint &ep)
: Session_component(tx_buf_size, rx_buf_size, rx_block_md_alloc, ram_session, ep)
{ {
if (pipe(_pipefd)) { if (pipe(_pipefd)) {
PERR("could not create pipe"); PERR("could not create pipe");
@ -112,41 +150,18 @@ class Nic_driver : public Tuntap_device,
} }
} }
~Nic_driver() { PDBG("should probably be implemented"); } /**************************************
** Nic::Session_component interface **
**************************************/
void link_state_changed() { _notify.link_state_changed(); } Nic::Mac_address mac_address() override { return _mac_addr; }
/*************************** bool link_state() override
** Nic::Driver interface **
***************************/
Nic::Mac_address mac_address() { return _mac_addr; }
bool link_state()
{ {
/* XXX always return true for now */ /* XXX always return true for now */
return true; return true;
} }
void tx(char const *packet, Genode::size_t size)
{
PDBGV("packet:0x%p size:%zu", packet, size);
_packet = packet;
/* notify openvpn */
::write(_pipefd[WRITE], "1", 1);
/* block while openvpn handles the packet */
_tx_lock.down();
}
/******************************
** Irq_activation interface **
******************************/
void handle_irq(int) { }
/*********************** /***********************
** TUN/TAP interface ** ** TUN/TAP interface **
***********************/ ***********************/
@ -171,10 +186,16 @@ class Nic_driver : public Tuntap_device,
int write(char const *buf, Genode::size_t len) int write(char const *buf, Genode::size_t len)
{ {
PDBGV("buf:0x%p len:%zu", len); PDBGV("buf:0x%p len:%zu", len);
_handle_packet_stream();
void *buffer = _alloc.alloc(len); if (!_rx.source()->ready_to_submit())
Genode::memcpy(buffer, buf, len); return 0;
_alloc.submit();
try {
Genode::Packet_descriptor packet = _rx.source()->alloc_packet(len);
Genode::memcpy(_rx.source()->packet_content(packet), buf, len);
_rx.source()->submit_packet(packet);
} catch (...) { return 0; }
return len; return len;
} }
@ -185,57 +206,86 @@ class Nic_driver : public Tuntap_device,
}; };
struct Main class Root : public Genode::Root_component<Openvpn_component, Genode::Single_client>
{ {
struct Nic_driver_factory : Nic::Driver_factory private:
{
Nic_driver *drv { 0 };
Openvpn_thread *openvpn { 0 };
Nic::Driver *create(Nic::Rx_buffer_alloc &alloc, Server::Entrypoint &_ep;
Nic::Driver_notification &notify) Openvpn_thread *_thread = nullptr;
protected:
Openvpn_component *_create_session(const char *args)
{ {
/* there can be only one */ using namespace Genode;
if (!drv) {
drv = new (Genode::env()->heap()) Nic_driver(alloc, notify);
/** size_t ram_quota = Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
* Setting the pointer in this manner is quite hackish but it has size_t tx_buf_size = Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
* to be valid before OpenVPN calls open_tun(), which unfortunatly size_t rx_buf_size = Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
* is early.
*/
_tuntap_dev = drv;
PDBGV("start OpenVPN main thread"); /* deplete ram quota by the memory needed for the session structure */
Openvpn_thread *openvpn = new (Genode::env()->heap()) Openvpn_thread(genode_argc, size_t session_size = max(4096UL, (unsigned long)sizeof(Openvpn_component));
genode_argv); if (ram_quota < session_size)
throw Genode::Root::Quota_exceeded();
openvpn->start(); /*
* Check if donated ram quota suffices for both communication
/* wait until OpenVPN configured the TUN/TAP device for the first time */ * buffers. Also check both sizes separately to handle a
_tuntap_dev->down(); * possible overflow of the sum of both sizes.
*/
return drv; if (tx_buf_size > ram_quota - session_size
|| rx_buf_size > ram_quota - session_size
|| tx_buf_size + rx_buf_size > ram_quota - session_size) {
PERR("insufficient 'ram_quota', got %zd, need %zd",
ram_quota, tx_buf_size + rx_buf_size + session_size);
throw Genode::Root::Quota_exceeded();
} }
return 0; Openvpn_component *component = new (Root::md_alloc())
Openvpn_component(tx_buf_size, rx_buf_size,
*env()->heap(),
*env()->ram_session(),
_ep);
/**
* Setting the pointer in this manner is quite hackish but it has
* to be valid before OpenVPN calls open_tun(), which unfortunatly
* is early.
*/
_tuntap_dev = component;
PDBGV("start OpenVPN main thread");
_thread = new (Genode::env()->heap()) Openvpn_thread(genode_argc, genode_argv);
_thread->start();
/* wait until OpenVPN configured the TUN/TAP device for the first time */
_tuntap_dev->down();
return component;
} }
void destroy(Nic::Driver *driver) void _destroy_session(Openvpn_component *session)
{ {
Genode::destroy(Genode::env()->heap(), static_cast<Nic_driver *>(driver)); Genode::destroy(Root::md_alloc(), session);
drv = 0; Genode::destroy(Root::md_alloc(), _thread);
Genode::destroy(Genode::env()->heap(), openvpn); _thread = nullptr;
openvpn = 0;
} }
} driver_factory;
public:
Root(Server::Entrypoint &ep, Genode::Allocator &md_alloc)
: Genode::Root_component<Openvpn_component, Genode::Single_client>(&ep.rpc_ep(), &md_alloc),
_ep(ep)
{ }
};
struct Main
{
Server::Entrypoint &ep; Server::Entrypoint &ep;
::Root nic_root { ep, *Genode::env()->heap() };
Main(Server::Entrypoint &ep) : ep(ep) Main(Server::Entrypoint &ep) : ep(ep)
{ {
static Nic::Root nic_root(&ep.rpc_ep(), Genode::env()->heap(), driver_factory);
Genode::env()->parent()->announce(ep.manage(nic_root)); Genode::env()->parent()->announce(ep.manage(nic_root));
} }
}; };