104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
/*
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* \brief LAN9118 NIC driver
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* \author Norman Feske
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* \author Stefan Kalkowski
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* \date 2011-05-19
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*
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* Note, this driver is only tested on Qemu. At the current stage, it is not
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* expected to function properly on hardware.
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*/
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/*
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* Copyright (C) 2011-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <base/attached_rom_dataspace.h>
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#include <base/component.h>
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#include <base/env.h>
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#include <base/heap.h>
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#include <nic/component.h>
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#include <root/component.h>
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/* driver code */
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#include <lan9118.h>
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class Root : public Genode::Root_component<Lan9118, Genode::Single_client>
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{
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private:
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enum {
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/**
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* If no resource addresses are given, we take these Realview
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* platform addresses as default ones.
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*/
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REALVIEW_MMIO_BASE = 0x4e000000,
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REALVIEW_IRQ = 60,
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/**
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* Size of MMIO resource
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*
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* The device spans actually a much larger
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* resource. However, only the first page is needed.
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*/
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LAN9118_MMIO_SIZE = 0x1000,
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};
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Genode::Env &_env;
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Genode::Attached_rom_dataspace _config { _env, "config" };
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Genode::addr_t _mmio_base { REALVIEW_MMIO_BASE };
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unsigned _irq { REALVIEW_IRQ };
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protected:
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Lan9118 *_create_session(const char *args) override
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{
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using namespace Genode;
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size_t ram_quota = Arg_string::find_arg(args, "ram_quota" ).ulong_value(0);
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size_t tx_buf_size = Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
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size_t rx_buf_size = Arg_string::find_arg(args, "rx_buf_size").ulong_value(0);
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/*
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* Check if donated ram quota suffices for both communication
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* buffers and check for overflow
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*/
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if (tx_buf_size + rx_buf_size < tx_buf_size ||
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tx_buf_size + rx_buf_size > ram_quota) {
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error("insufficient 'ram_quota', got ", ram_quota, ", "
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"need ", tx_buf_size + rx_buf_size);
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throw Genode::Insufficient_ram_quota();
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}
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return new (Root::md_alloc())
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Lan9118(_mmio_base, LAN9118_MMIO_SIZE, _irq,
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tx_buf_size, rx_buf_size, *md_alloc(), _env);
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}
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public:
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Root(Genode::Env &env, Genode::Allocator &md_alloc)
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: Genode::Root_component<Lan9118,
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Genode::Single_client>(env.ep(), md_alloc),
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_env(env)
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{
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_mmio_base =
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_config.xml().attribute_value("mmio_base",
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(Genode::addr_t)REALVIEW_MMIO_BASE);
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_irq = _config.xml().attribute_value<unsigned>("irq", REALVIEW_IRQ);
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}
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};
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void Component::construct(Genode::Env &env)
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{
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static Genode::Heap heap(env.ram(), env.rm());
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static Root nic_root(env, heap);
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Genode::log("--- LAN9118 NIC driver started ---");
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env.parent().announce(env.ep().manage(nic_root));
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}
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