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Kernel: Remove the NE2000 PCI network adapter driver

Browse source 
Nobody tests this network card as the person who added it, Jean-Baptiste
Boric (known as boricj) is not an active contributor in the project now.
After a discussion with him on the Discord server, we agreed it's for
the best to remove the driver, as for two reasons:
- The original author (boricj) agreed to do this, stating that he will
  not be able to test the driver anymore after his Athlon XP machine is
  no longer supported after the removal of the i686 port.
- It was agreed that the NE2000 network card family is far from the
  ideal hardware we would want to support, similarly to the RTL8139 that
  got removed recently for almost the same reason.
This commit is contained in:
Liav A 2023-01-07 21:34:26 +02:00 committed by Jelle Raaijmakers
parent 2e985bb505
commit c876412b1b
6 changed files with 0 additions and 561 deletions
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1
Kernel/CMakeLists.txt
View file

@ -238,7 +238,6 @@ set(KERNEL_SOURCES
Locking/Mutex.cpp
Net/Intel/E1000ENetworkAdapter.cpp
Net/Intel/E1000NetworkAdapter.cpp
Net/NE2000/NetworkAdapter.cpp
Net/Realtek/RTL8168NetworkAdapter.cpp
Net/IPv4Socket.cpp
Net/LocalSocket.cpp

4
Kernel/Debug.h.in
View file

@ -219,10 +219,6 @@
#cmakedefine01 MULTIPROCESSOR_DEBUG
#endif
#ifndef NE2000_DEBUG
#cmakedefine01 NE2000_DEBUG
#endif
#ifndef NETWORK_TASK_DEBUG
#cmakedefine01 NETWORK_TASK_DEBUG
#endif

480
Kernel/Net/NE2000/NetworkAdapter.cpp
View file

@ -1,480 +0,0 @@
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/MACAddress.h>
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Debug.h>
#include <Kernel/IOWindow.h>
#include <Kernel/Net/NE2000/NetworkAdapter.h>
#include <Kernel/Net/NetworkingManagement.h>
#include <Kernel/Sections.h>
namespace Kernel {
/**
* The NE2000 is an ancient 10 Mib/s Ethernet network card standard by Novell
* from the late 80s. Based on National Semiconductor's DP8390 Ethernet chip
* or compatible, they were known to be extremely bare-bones but also very
* cheap entry-level cards.
*
* QEMU supports them with the ne2k_{isa,pci} devices, physical incarnations
* were available from different manufacturers for the ISA bus and later on
* the PCI bus, including:
* - Realtek's RTL8029
* - VIA Technologies, Inc.'s VT86C926
*
* Official documentation from National Semiconductor includes:
* - Datasheet "DP8390D/NS32490D NIC Network Interface Controller"
* - Application Note 874 "Writing Drivers for the DP8390 NIC Family of Ethernet Controllers"
*
* This driver supports only the PCI variant.
*
* Remember, friends don't let friends use NE2000 network cards :^)
*/
// Page 0 registers
static constexpr u8 REG_RW_COMMAND = 0x00;
static constexpr u8 BIT_COMMAND_STOP = (0b1 << 0);
static constexpr u8 BIT_COMMAND_START = (0b1 << 1);
static constexpr u8 BIT_COMMAND_TXP = (0b1 << 2);
static constexpr u8 BIT_COMMAND_DMA_READ = (0b001 << 3);
static constexpr u8 BIT_COMMAND_DMA_WRITE = (0b010 << 3);
static constexpr u8 BIT_COMMAND_DMA_SEND = (0b011 << 3);
static constexpr u8 BIT_COMMAND_DMA_ABORT = (0b100 << 3);
static constexpr u8 BIT_COMMAND_DMA_FIELD = (0b111 << 3);
static constexpr u8 BIT_COMMAND_PAGE1 = (0b01 << 6);
static constexpr u8 BIT_COMMAND_PAGE2 = (0b10 << 6);
static constexpr u8 BIT_COMMAND_PAGE_FIELD = (0b11 << 6);
static constexpr u8 REG_WR_PAGESTART = 0x01;
static constexpr u8 REG_WR_PAGESTOP = 0x02;
static constexpr u8 REG_RW_BOUNDARY = 0x03;
static constexpr u8 REG_RD_TRANSMITSTATUS = 0x04;
static constexpr u8 REG_WR_TRANSMITPAGE = 0x04;
static constexpr u8 REG_RD_NCR = 0x05;
static constexpr u8 REG_WR_TRANSMITBYTECOUNT0 = 0x05;
static constexpr u8 REG_WR_TRANSMITBYTECOUNT1 = 0x06;
static constexpr u8 REG_RW_INTERRUPTSTATUS = 0x07;
static constexpr u8 REG_RD_CRDMA0 = 0x08;
static constexpr u8 REG_WR_REMOTESTARTADDRESS0 = 0x08;
static constexpr u8 REG_RD_CRDMA1 = 0x09;
static constexpr u8 REG_WR_REMOTESTARTADDRESS1 = 0x09;
static constexpr u8 REG_WR_REMOTEBYTECOUNT0 = 0x0a;
static constexpr u8 REG_WR_REMOTEBYTECOUNT1 = 0x0b;
static constexpr u8 REG_RD_RECEIVESTATUS = 0x0c;
static constexpr u8 BIT_RECEIVESTATUS_PRX = (0b1 << 0);
static constexpr u8 BIT_RECEIVESTATUS_CRC = (0b1 << 1);
static constexpr u8 BIT_RECEIVESTATUS_FAE = (0b1 << 2);
static constexpr u8 BIT_RECEIVESTATUS_FO = (0b1 << 3);
static constexpr u8 BIT_RECEIVESTATUS_MPA = (0b1 << 4);
static constexpr u8 REG_WR_RECEIVECONFIGURATION = 0x0c;
static constexpr u8 BIT_RECEIVECONFIGURATION_SEP = (0b1 << 0);
static constexpr u8 BIT_RECEIVECONFIGURATION_AR = (0b1 << 1);
static constexpr u8 BIT_RECEIVECONFIGURATION_AB = (0b1 << 2);
static constexpr u8 BIT_RECEIVECONFIGURATION_AM = (0b1 << 3);
static constexpr u8 BIT_RECEIVECONFIGURATION_PRO = (0b1 << 4);
static constexpr u8 BIT_RECEIVECONFIGURATION_MON = (0b1 << 5);
static constexpr u8 REG_RD_FAE_TALLY = 0x0d;
static constexpr u8 REG_WR_TRANSMITCONFIGURATION = 0x0d;
static constexpr u8 BIT_WR_TRANSMITCONFIGURATION_LOOPBACK = (0b10 << 0);
static constexpr u8 REG_RD_CRC_TALLY = 0x0e;
static constexpr u8 REG_WR_DATACONFIGURATION = 0x0e;
static constexpr u8 BIT_DATACONFIGURATION_WTS = (0b1 << 0);
static constexpr u8 BIT_DATACONFIGURATION_BOS = (0b1 << 1);
static constexpr u8 BIT_DATACONFIGURATION_LS = (0b1 << 2);
static constexpr u8 BIT_DATACONFIGURATION_FIFO_8B = (0b10 << 5);
static constexpr u8 REG_RD_MISS_PKT_TALLY = 0x0f;
static constexpr u8 REG_WR_INTERRUPTMASK = 0x0f;
static constexpr u8 BIT_INTERRUPTMASK_PRX = (0b1 << 0);
static constexpr u8 BIT_INTERRUPTMASK_PTX = (0b1 << 1);
static constexpr u8 BIT_INTERRUPTMASK_RXE = (0b1 << 2);
static constexpr u8 BIT_INTERRUPTMASK_TXE = (0b1 << 3);
static constexpr u8 BIT_INTERRUPTMASK_OVW = (0b1 << 4);
static constexpr u8 BIT_INTERRUPTMASK_CNT = (0b1 << 5);
static constexpr u8 BIT_INTERRUPTMASK_RDC = (0b1 << 6);
static constexpr u8 BIT_INTERRUPTMASK_RST = (0b1 << 7);
static constexpr u8 REG_RW_IOPORT = 0x10;
// Page 1 registers
static constexpr u8 REG_RW_PHYSICALADDRESS0 = 0x01;
static constexpr u8 REG_RW_CURRENT = 0x07;
static constexpr int NE2K_PAGE_SIZE = 256;
static constexpr int NE2K_RAM_BEGIN = 16384;
static constexpr int NE2K_RAM_END = 32768;
static constexpr int NE2K_RAM_SIZE = NE2K_RAM_END - NE2K_RAM_BEGIN;
static constexpr int NE2K_RAM_SEND_BEGIN = 16384;
static constexpr int NE2K_RAM_SEND_END = 16384 + 6 * NE2K_PAGE_SIZE;
static constexpr int NE2K_RAM_SEND_SIZE = NE2K_RAM_SEND_END - NE2K_RAM_SEND_BEGIN;
static constexpr int NE2K_RAM_RECV_BEGIN = NE2K_RAM_SEND_END;
static constexpr int NE2K_RAM_RECV_END = NE2K_RAM_END;
static constexpr int NE2K_RAM_RECV_SIZE = NE2K_RAM_RECV_END - NE2K_RAM_RECV_BEGIN;
static_assert(NE2K_RAM_BEGIN % NE2K_PAGE_SIZE == 0);
static_assert(NE2K_RAM_END % NE2K_PAGE_SIZE == 0);
static_assert(NE2K_RAM_SEND_BEGIN % NE2K_PAGE_SIZE == 0);
static_assert(NE2K_RAM_SEND_END % NE2K_PAGE_SIZE == 0);
static_assert(NE2K_RAM_RECV_BEGIN % NE2K_PAGE_SIZE == 0);
static_assert(NE2K_RAM_RECV_END % NE2K_PAGE_SIZE == 0);
struct [[gnu::packed]] received_packet_header {
u8 status;
u8 next_packet_page;
u16 length;
};
UNMAP_AFTER_INIT ErrorOr<bool> NE2000NetworkAdapter::probe(PCI::DeviceIdentifier const& pci_device_identifier)
{
constexpr auto ne2k_ids = Array {
PCI::HardwareID { 0x10EC, 0x8029 }, // RealTek RTL-8029(AS)
// List of clones, taken from Linux's ne2k-pci.c
PCI::HardwareID { 0x1050, 0x0940 }, // Winbond 89C940
PCI::HardwareID { 0x11f6, 0x1401 }, // Compex RL2000
PCI::HardwareID { 0x8e2e, 0x3000 }, // KTI ET32P2
PCI::HardwareID { 0x4a14, 0x5000 }, // NetVin NV5000SC
PCI::HardwareID { 0x1106, 0x0926 }, // Via 86C926
PCI::HardwareID { 0x10bd, 0x0e34 }, // SureCom NE34
PCI::HardwareID { 0x1050, 0x5a5a }, // Winbond W89C940F
PCI::HardwareID { 0x12c3, 0x0058 }, // Holtek HT80232
PCI::HardwareID { 0x12c3, 0x5598 }, // Holtek HT80229
PCI::HardwareID { 0x8c4a, 0x1980 }, // Winbond W89C940 (misprogrammed)
};
return ne2k_ids.span().contains_slow(pci_device_identifier.hardware_id());
}
UNMAP_AFTER_INIT ErrorOr<NonnullLockRefPtr<NetworkAdapter>> NE2000NetworkAdapter::create(PCI::DeviceIdentifier const& pci_device_identifier)
{
u8 irq = pci_device_identifier.interrupt_line().value();
auto interface_name = TRY(NetworkingManagement::generate_interface_name_from_pci_address(pci_device_identifier));
auto registers_io_window = TRY(IOWindow::create_for_pci_device_bar(pci_device_identifier, PCI::HeaderType0BaseRegister::BAR0));
return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) NE2000NetworkAdapter(pci_device_identifier.address(), irq, move(registers_io_window), move(interface_name))));
}
UNMAP_AFTER_INIT ErrorOr<void> NE2000NetworkAdapter::initialize(Badge<NetworkingManagement>)
{
dmesgln_pci(*this, "Found @ {}", pci_address());
dmesgln_pci(*this, "Port base: {}", m_registers_io_window);
dmesgln_pci(*this, "Interrupt line: {}", interrupt_number());
int ram_errors = ram_test();
dmesgln_pci(*this, "RAM test {}, got {} byte errors", (ram_errors == 0 ? "OK" : "KO"), ram_errors);
reset();
set_mac_address(m_mac_address);
dmesgln_pci(*this, "MAC address: {}", m_mac_address.to_string());
enable_irq();
return {};
}
UNMAP_AFTER_INIT NE2000NetworkAdapter::NE2000NetworkAdapter(PCI::Address address, u8 irq, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString> interface_name)
: NetworkAdapter(move(interface_name))
, PCI::Device(address)
, IRQHandler(irq)
, m_registers_io_window(move(registers_io_window))
{
}
UNMAP_AFTER_INIT NE2000NetworkAdapter::~NE2000NetworkAdapter() = default;
bool NE2000NetworkAdapter::handle_irq(RegisterState const&)
{
u8 status = in8(REG_RW_INTERRUPTSTATUS);
m_entropy_source.add_random_event(status);
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Got interrupt, status={:#02x}", status);
if (status == 0) {
return false;
}
if (status & BIT_INTERRUPTMASK_PRX) {
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Interrupt for packet received");
}
if (status & BIT_INTERRUPTMASK_PTX) {
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Interrupt for packet sent");
}
if (status & BIT_INTERRUPTMASK_RXE) {
u8 fae = in8(REG_RD_FAE_TALLY);
u8 crc = in8(REG_RD_CRC_TALLY);
u8 miss = in8(REG_RD_MISS_PKT_TALLY);
dmesgln_pci(*this, "Packet reception error framing={} crc={} missed={}", fae, crc, miss);
// TODO: handle counters
}
if (status & BIT_INTERRUPTMASK_TXE) {
dmesgln_pci(*this, "Packet transmission error");
}
if (status & BIT_INTERRUPTMASK_OVW) {
dmesgln_pci(*this, "Ring buffer reception overflow error");
// TODO: handle counters
}
if (status & BIT_INTERRUPTMASK_CNT) {
dmesgln_pci(*this, "Counter overflow error");
// TODO: handle counters
}
if (status & BIT_INTERRUPTMASK_RST) {
dmesgln_pci(*this, "NIC requires reset due to packet reception overflow");
// TODO: proper reset procedure
reset();
}
receive();
m_wait_queue.wake_all();
out8(REG_RW_INTERRUPTSTATUS, status);
return true;
}
UNMAP_AFTER_INIT int NE2000NetworkAdapter::ram_test()
{
int errors = 0;
out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_STOP);
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_WTS);
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_BOS | BIT_DATACONFIGURATION_WTS);
#else
# error Unknown byte order
#endif
out8(REG_WR_REMOTEBYTECOUNT0, 0x00);
out8(REG_WR_REMOTEBYTECOUNT1, 0x00);
out8(REG_WR_RECEIVECONFIGURATION, BIT_RECEIVECONFIGURATION_MON);
out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_START);
Array<u8, NE2K_RAM_SIZE> buffer;
const u8 patterns[3] = { 0x5a, 0xff, 0x00 };
for (int i = 0; i < 3; ++i) {
for (size_t j = 0; j < buffer.size(); ++j)
buffer[j] = patterns[i];
rdma_write(NE2K_RAM_BEGIN, buffer);
rdma_read(NE2K_RAM_BEGIN, buffer);
for (size_t j = 0; j < buffer.size(); ++j) {
if (buffer[j] != patterns[i]) {
if (errors < 16)
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Bad adapter RAM @ {} expected={} got={}", PhysicalAddress(NE2K_RAM_BEGIN + j), patterns[i], buffer[j]);
else if (errors == 16)
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Too many RAM errors, silencing further output");
errors++;
}
}
}
return errors;
}
void NE2000NetworkAdapter::reset()
{
const u8 interrupt_mask = BIT_INTERRUPTMASK_PRX | BIT_INTERRUPTMASK_PTX | BIT_INTERRUPTMASK_RXE | BIT_INTERRUPTMASK_TXE | BIT_INTERRUPTMASK_OVW | BIT_INTERRUPTMASK_CNT;
u8 prom[32];
// Taken from DP8390D's datasheet section 11.0, "Initialization Procedures"
out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_STOP);
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_WTS);
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_BOS | BIT_DATACONFIGURATION_WTS);
#else
# error Unknown byte order
#endif
out8(REG_WR_REMOTEBYTECOUNT0, 0x00);
out8(REG_WR_REMOTEBYTECOUNT1, 0x00);
out8(REG_WR_RECEIVECONFIGURATION, BIT_RECEIVECONFIGURATION_AB | BIT_RECEIVECONFIGURATION_AR);
out8(REG_WR_TRANSMITCONFIGURATION, BIT_WR_TRANSMITCONFIGURATION_LOOPBACK);
m_ring_read_ptr = NE2K_RAM_RECV_BEGIN >> 8;
out8(REG_WR_PAGESTART, NE2K_RAM_RECV_BEGIN >> 8);
out8(REG_RW_BOUNDARY, NE2K_RAM_RECV_BEGIN >> 8);
out8(REG_WR_PAGESTOP, NE2K_RAM_RECV_END >> 8);
out8(REG_RW_INTERRUPTSTATUS, 0xff);
out8(REG_WR_INTERRUPTMASK, interrupt_mask);
rdma_read(0, Bytes(prom, sizeof(prom)));
for (int i = 0; i < 6; i++) {
m_mac_address[i] = prom[i * 2];
}
out8(REG_RW_COMMAND, BIT_COMMAND_PAGE1 | BIT_COMMAND_DMA_ABORT | BIT_COMMAND_STOP);
for (int i = 0; i < 6; i++) {
out8(REG_RW_PHYSICALADDRESS0 + i, m_mac_address[i]);
}
out8(REG_RW_CURRENT, NE2K_RAM_RECV_BEGIN >> 8);
out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_START);
out8(REG_WR_TRANSMITCONFIGURATION, 0xe0);
}
void NE2000NetworkAdapter::rdma_read(size_t address, Bytes payload)
{
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: DMA read @ {} length={}", PhysicalAddress(address), payload.size());
u8 command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_PAGE_FIELD | BIT_COMMAND_DMA_FIELD);
out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_ABORT);
out8(REG_RW_INTERRUPTSTATUS, BIT_INTERRUPTMASK_RDC);
out8(REG_WR_REMOTEBYTECOUNT0, payload.size());
out8(REG_WR_REMOTEBYTECOUNT1, payload.size() >> 8);
out8(REG_WR_REMOTESTARTADDRESS0, address);
out8(REG_WR_REMOTESTARTADDRESS1, address >> 8);
command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_DMA_FIELD);
out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_READ);
for (size_t i = 0; i < payload.size(); i += 2) {
u16 data = in16(REG_RW_IOPORT);
payload[i] = data;
if (i != payload.size() - 1)
payload[i + 1] = data >> 8;
}
while (!(in8(REG_RW_INTERRUPTSTATUS) & BIT_INTERRUPTMASK_RDC))
;
}
void NE2000NetworkAdapter::rdma_write(size_t address, ReadonlyBytes payload)
{
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: DMA write @ {} length={}", PhysicalAddress(address), payload.size());
u8 command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_PAGE_FIELD | BIT_COMMAND_DMA_FIELD);
out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_ABORT);
out8(REG_RW_INTERRUPTSTATUS, BIT_INTERRUPTMASK_RDC);
out8(REG_WR_REMOTEBYTECOUNT0, payload.size());
out8(REG_WR_REMOTEBYTECOUNT1, payload.size() >> 8);
out8(REG_WR_REMOTESTARTADDRESS0, address);
out8(REG_WR_REMOTESTARTADDRESS1, address >> 8);
command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_DMA_FIELD);
out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_WRITE);
for (size_t i = 0; i < payload.size(); i += 2) {
u16 data = payload[i];
if (i != payload.size() - 1)
data |= payload[i + 1] << 8;
out16(REG_RW_IOPORT, data);
}
while (!(in8(REG_RW_INTERRUPTSTATUS) & BIT_INTERRUPTMASK_RDC))
;
}
void NE2000NetworkAdapter::send_raw(ReadonlyBytes payload)
{
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Sending packet length={}", payload.size());
if (payload.size() > NE2K_RAM_SEND_SIZE) {
dmesgln_pci(*this, "Packet to send was too big; discarding");
return;
}
while (in8(REG_RW_COMMAND) & BIT_COMMAND_TXP)
m_wait_queue.wait_forever(device_name());
disable_irq();
size_t packet_size = payload.size();
if (packet_size < 64)
packet_size = 64;
rdma_write(NE2K_RAM_SEND_BEGIN, payload);
out8(REG_WR_TRANSMITPAGE, NE2K_RAM_SEND_BEGIN >> 8);
out8(REG_WR_TRANSMITBYTECOUNT0, packet_size);
out8(REG_WR_TRANSMITBYTECOUNT1, packet_size >> 8);
out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_TXP | BIT_COMMAND_START);
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Packet submitted for transmission");
enable_irq();
}
void NE2000NetworkAdapter::receive()
{
while (true) {
out8(REG_RW_COMMAND, BIT_COMMAND_PAGE1 | in8(REG_RW_COMMAND));
u8 current = in8(REG_RW_CURRENT);
out8(REG_RW_COMMAND, in8(REG_RW_COMMAND) & ~BIT_COMMAND_PAGE_FIELD);
if (m_ring_read_ptr == current)
break;
size_t header_address = m_ring_read_ptr << 8;
received_packet_header header;
rdma_read(header_address, Bytes(reinterpret_cast<u8*>(&header), sizeof(header)));
bool packet_ok = header.status & BIT_RECEIVESTATUS_PRX;
dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Packet received {} length={}", (packet_ok ? "intact" : "damaged"), header.length);
if (packet_ok) {
size_t bytes_in_packet = sizeof(received_packet_header) + header.length;
auto packet_result = NetworkByteBuffer::create_uninitialized(bytes_in_packet);
u8 drop_buffer[NE2K_PAGE_SIZE];
Bytes buffer { drop_buffer, array_size(drop_buffer) };
bool will_drop { false };
if (packet_result.is_error()) {
dbgln("NE2000NetworkAdapter: Not enough memory for packet with length = {}, dropping.", header.length);
will_drop = true;
} else {
buffer = packet_result.value().bytes();
}
int current_offset = 0;
int ring_offset = header_address;
while (bytes_in_packet > 0) {
int copy_size = min(bytes_in_packet, NE2K_PAGE_SIZE);
rdma_read(ring_offset, buffer.slice(current_offset, copy_size));
if (!will_drop)
current_offset += copy_size;
ring_offset += copy_size;
bytes_in_packet -= copy_size;
if (ring_offset == NE2K_RAM_RECV_END)
ring_offset = NE2K_RAM_RECV_BEGIN;
}
if (!will_drop)
did_receive(buffer.slice(sizeof(received_packet_header)));
}
if (header.next_packet_page == (NE2K_RAM_RECV_BEGIN >> 8))
out8(REG_RW_BOUNDARY, (NE2K_RAM_RECV_END >> 8) - 1);
else
out8(REG_RW_BOUNDARY, header.next_packet_page - 1);
m_ring_read_ptr = header.next_packet_page;
}
}
void NE2000NetworkAdapter::out8(u16 address, u8 data)
{
m_registers_io_window->write8(address, data);
}
void NE2000NetworkAdapter::out16(u16 address, u16 data)
{
m_registers_io_window->write16(address, data);
}
u8 NE2000NetworkAdapter::in8(u16 address)
{
return m_registers_io_window->read8(address);
}
u16 NE2000NetworkAdapter::in16(u16 address)
{
return m_registers_io_window->read16(address);
}
}

73
Kernel/Net/NE2000/NetworkAdapter.h
View file

@ -1,73 +0,0 @@
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <Kernel/Bus/PCI/Access.h>
#include <Kernel/Bus/PCI/Device.h>
#include <Kernel/IOWindow.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Net/NetworkAdapter.h>
#include <Kernel/Random.h>
namespace Kernel {
class NE2000NetworkAdapter final : public NetworkAdapter
, public PCI::Device
, public IRQHandler {
public:
static ErrorOr<bool> probe(PCI::DeviceIdentifier const&);
static ErrorOr<NonnullLockRefPtr<NetworkAdapter>> create(PCI::DeviceIdentifier const&);
virtual ErrorOr<void> initialize(Badge<NetworkingManagement>) override;
virtual ~NE2000NetworkAdapter() override;
virtual void send_raw(ReadonlyBytes) override;
virtual bool link_up() override
{
// Pure NE2000 doesn't seem to have a link status indicator, so
// just assume that it's up.
return true;
}
virtual i32 link_speed() override
{
// Can only do 10mbit..
return 10;
}
virtual bool link_full_duplex() override { return true; }
virtual StringView purpose() const override { return class_name(); }
virtual StringView device_name() const override { return class_name(); }
private:
NE2000NetworkAdapter(PCI::Address, u8, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString>);
virtual bool handle_irq(RegisterState const&) override;
virtual StringView class_name() const override { return "NE2000NetworkAdapter"sv; }
int ram_test();
void reset();
void rdma_read(size_t address, Bytes payload);
void rdma_write(size_t address, ReadonlyBytes payload);
void receive();
void out8(u16 address, u8 data);
void out16(u16 address, u16 data);
u8 in8(u16 address);
u16 in16(u16 address);
NonnullOwnPtr<IOWindow> m_registers_io_window;
int m_ring_read_ptr;
u8 m_interrupt_line { 0 };
MACAddress m_mac_address;
EntropySource m_entropy_source;
WaitQueue m_wait_queue;
};
}

2
Kernel/Net/NetworkingManagement.cpp
View file

@ -13,7 +13,6 @@
#include <Kernel/Net/Intel/E1000ENetworkAdapter.h>
#include <Kernel/Net/Intel/E1000NetworkAdapter.h>
#include <Kernel/Net/LoopbackAdapter.h>
#include <Kernel/Net/NE2000/NetworkAdapter.h>
#include <Kernel/Net/NetworkingManagement.h>
#include <Kernel/Net/Realtek/RTL8168NetworkAdapter.h>
#include <Kernel/Sections.h>
@ -99,7 +98,6 @@ struct PCINetworkDriverInitializer {
static constexpr PCINetworkDriverInitializer s_initializers[] = {
{ RTL8168NetworkAdapter::probe, RTL8168NetworkAdapter::create },
{ NE2000NetworkAdapter::probe, NE2000NetworkAdapter::create },
{ E1000NetworkAdapter::probe, E1000NetworkAdapter::create },
{ E1000ENetworkAdapter::probe, E1000ENetworkAdapter::create },
};

1
Meta/CMake/all_the_debug_macros.cmake
View file

@ -128,7 +128,6 @@ set(MINIMIZE_ANIMATION_DEBUG ON)
set(MOUSE_DEBUG ON)
set(MOVE_DEBUG ON)
set(MULTIPROCESSOR_DEBUG ON)
set(NE2000_DEBUG ON)
set(NETWORKJOB_DEBUG ON)
set(NETWORK_TASK_DEBUG ON)
set(NT_DEBUG ON)