mirror of
https://github.com/RGBCube/serenity
synced 2025-05-25 07:25:07 +00:00
30d3f2789e
When scanning for network adapters, we give each driver a chance to claim the PCI device and whoever claims it first gets to keep it. Before this patch, the driver API returned a LockRefPtr<AdapterType>, which made it impossible to propagate errors that occurred during detection and/or initialization. This patch changes the API so that errors can bubble all the way out the PCI enumeration in NetworkingManagement::initialize() where we perform all the network adapter auto-detection on boot. When we eventually start to support hot-plugging network adapter in the future, it will be even more important to propagate errors instead of swallowing them. Importantly, before this patch, some errors were "handled" by panicking the kernel. This is no longer the case. 7 FIXMEs were killed in the making of this commit. :^)
472 lines
18 KiB
C++
472 lines
18 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/MACAddress.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Debug.h>
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#include <Kernel/IOWindow.h>
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#include <Kernel/Net/NE2000/NetworkAdapter.h>
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#include <Kernel/Net/NetworkingManagement.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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/**
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* The NE2000 is an ancient 10 Mib/s Ethernet network card standard by Novell
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* from the late 80s. Based on National Semiconductor's DP8390 Ethernet chip
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* or compatible, they were known to be extremely bare-bones but also very
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* cheap entry-level cards.
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*
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* QEMU supports them with the ne2k_{isa,pci} devices, physical incarnations
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* were available from different manufacturers for the ISA bus and later on
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* the PCI bus, including:
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* - Realtek's RTL8029
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* - VIA Technologies, Inc.'s VT86C926
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*
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* Official documentation from National Semiconductor includes:
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* - Datasheet "DP8390D/NS32490D NIC Network Interface Controller"
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* - Application Note 874 "Writing Drivers for the DP8390 NIC Family of Ethernet Controllers"
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*
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* This driver supports only the PCI variant.
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*
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* Remember, friends don't let friends use NE2000 network cards :^)
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*/
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// Page 0 registers
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static constexpr u8 REG_RW_COMMAND = 0x00;
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static constexpr u8 BIT_COMMAND_STOP = (0b1 << 0);
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static constexpr u8 BIT_COMMAND_START = (0b1 << 1);
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static constexpr u8 BIT_COMMAND_TXP = (0b1 << 2);
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static constexpr u8 BIT_COMMAND_DMA_READ = (0b001 << 3);
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static constexpr u8 BIT_COMMAND_DMA_WRITE = (0b010 << 3);
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static constexpr u8 BIT_COMMAND_DMA_SEND = (0b011 << 3);
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static constexpr u8 BIT_COMMAND_DMA_ABORT = (0b100 << 3);
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static constexpr u8 BIT_COMMAND_DMA_FIELD = (0b111 << 3);
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static constexpr u8 BIT_COMMAND_PAGE1 = (0b01 << 6);
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static constexpr u8 BIT_COMMAND_PAGE2 = (0b10 << 6);
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static constexpr u8 BIT_COMMAND_PAGE_FIELD = (0b11 << 6);
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static constexpr u8 REG_WR_PAGESTART = 0x01;
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static constexpr u8 REG_WR_PAGESTOP = 0x02;
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static constexpr u8 REG_RW_BOUNDARY = 0x03;
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static constexpr u8 REG_RD_TRANSMITSTATUS = 0x04;
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static constexpr u8 REG_WR_TRANSMITPAGE = 0x04;
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static constexpr u8 REG_RD_NCR = 0x05;
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static constexpr u8 REG_WR_TRANSMITBYTECOUNT0 = 0x05;
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static constexpr u8 REG_WR_TRANSMITBYTECOUNT1 = 0x06;
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static constexpr u8 REG_RW_INTERRUPTSTATUS = 0x07;
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static constexpr u8 REG_RD_CRDMA0 = 0x08;
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static constexpr u8 REG_WR_REMOTESTARTADDRESS0 = 0x08;
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static constexpr u8 REG_RD_CRDMA1 = 0x09;
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static constexpr u8 REG_WR_REMOTESTARTADDRESS1 = 0x09;
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static constexpr u8 REG_WR_REMOTEBYTECOUNT0 = 0x0a;
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static constexpr u8 REG_WR_REMOTEBYTECOUNT1 = 0x0b;
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static constexpr u8 REG_RD_RECEIVESTATUS = 0x0c;
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static constexpr u8 BIT_RECEIVESTATUS_PRX = (0b1 << 0);
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static constexpr u8 BIT_RECEIVESTATUS_CRC = (0b1 << 1);
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static constexpr u8 BIT_RECEIVESTATUS_FAE = (0b1 << 2);
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static constexpr u8 BIT_RECEIVESTATUS_FO = (0b1 << 3);
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static constexpr u8 BIT_RECEIVESTATUS_MPA = (0b1 << 4);
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static constexpr u8 REG_WR_RECEIVECONFIGURATION = 0x0c;
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static constexpr u8 BIT_RECEIVECONFIGURATION_SEP = (0b1 << 0);
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static constexpr u8 BIT_RECEIVECONFIGURATION_AR = (0b1 << 1);
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static constexpr u8 BIT_RECEIVECONFIGURATION_AB = (0b1 << 2);
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static constexpr u8 BIT_RECEIVECONFIGURATION_AM = (0b1 << 3);
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static constexpr u8 BIT_RECEIVECONFIGURATION_PRO = (0b1 << 4);
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static constexpr u8 BIT_RECEIVECONFIGURATION_MON = (0b1 << 5);
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static constexpr u8 REG_RD_FAE_TALLY = 0x0d;
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static constexpr u8 REG_WR_TRANSMITCONFIGURATION = 0x0d;
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static constexpr u8 BIT_WR_TRANSMITCONFIGURATION_LOOPBACK = (0b10 << 0);
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static constexpr u8 REG_RD_CRC_TALLY = 0x0e;
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static constexpr u8 REG_WR_DATACONFIGURATION = 0x0e;
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static constexpr u8 BIT_DATACONFIGURATION_WTS = (0b1 << 0);
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static constexpr u8 BIT_DATACONFIGURATION_BOS = (0b1 << 1);
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static constexpr u8 BIT_DATACONFIGURATION_LS = (0b1 << 2);
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static constexpr u8 BIT_DATACONFIGURATION_FIFO_8B = (0b10 << 5);
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static constexpr u8 REG_RD_MISS_PKT_TALLY = 0x0f;
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static constexpr u8 REG_WR_INTERRUPTMASK = 0x0f;
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static constexpr u8 BIT_INTERRUPTMASK_PRX = (0b1 << 0);
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static constexpr u8 BIT_INTERRUPTMASK_PTX = (0b1 << 1);
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static constexpr u8 BIT_INTERRUPTMASK_RXE = (0b1 << 2);
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static constexpr u8 BIT_INTERRUPTMASK_TXE = (0b1 << 3);
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static constexpr u8 BIT_INTERRUPTMASK_OVW = (0b1 << 4);
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static constexpr u8 BIT_INTERRUPTMASK_CNT = (0b1 << 5);
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static constexpr u8 BIT_INTERRUPTMASK_RDC = (0b1 << 6);
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static constexpr u8 BIT_INTERRUPTMASK_RST = (0b1 << 7);
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static constexpr u8 REG_RW_IOPORT = 0x10;
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// Page 1 registers
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static constexpr u8 REG_RW_PHYSICALADDRESS0 = 0x01;
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static constexpr u8 REG_RW_CURRENT = 0x07;
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static constexpr int NE2K_PAGE_SIZE = 256;
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static constexpr int NE2K_RAM_BEGIN = 16384;
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static constexpr int NE2K_RAM_END = 32768;
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static constexpr int NE2K_RAM_SIZE = NE2K_RAM_END - NE2K_RAM_BEGIN;
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static constexpr int NE2K_RAM_SEND_BEGIN = 16384;
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static constexpr int NE2K_RAM_SEND_END = 16384 + 6 * NE2K_PAGE_SIZE;
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static constexpr int NE2K_RAM_SEND_SIZE = NE2K_RAM_SEND_END - NE2K_RAM_SEND_BEGIN;
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static constexpr int NE2K_RAM_RECV_BEGIN = NE2K_RAM_SEND_END;
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static constexpr int NE2K_RAM_RECV_END = NE2K_RAM_END;
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static constexpr int NE2K_RAM_RECV_SIZE = NE2K_RAM_RECV_END - NE2K_RAM_RECV_BEGIN;
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static_assert(NE2K_RAM_BEGIN % NE2K_PAGE_SIZE == 0);
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static_assert(NE2K_RAM_END % NE2K_PAGE_SIZE == 0);
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static_assert(NE2K_RAM_SEND_BEGIN % NE2K_PAGE_SIZE == 0);
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static_assert(NE2K_RAM_SEND_END % NE2K_PAGE_SIZE == 0);
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static_assert(NE2K_RAM_RECV_BEGIN % NE2K_PAGE_SIZE == 0);
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static_assert(NE2K_RAM_RECV_END % NE2K_PAGE_SIZE == 0);
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struct [[gnu::packed]] received_packet_header {
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u8 status;
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u8 next_packet_page;
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u16 length;
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};
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UNMAP_AFTER_INIT ErrorOr<LockRefPtr<NE2000NetworkAdapter>> NE2000NetworkAdapter::try_to_initialize(PCI::DeviceIdentifier const& pci_device_identifier)
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{
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constexpr auto ne2k_ids = Array {
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PCI::HardwareID { 0x10EC, 0x8029 }, // RealTek RTL-8029(AS)
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// List of clones, taken from Linux's ne2k-pci.c
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PCI::HardwareID { 0x1050, 0x0940 }, // Winbond 89C940
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PCI::HardwareID { 0x11f6, 0x1401 }, // Compex RL2000
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PCI::HardwareID { 0x8e2e, 0x3000 }, // KTI ET32P2
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PCI::HardwareID { 0x4a14, 0x5000 }, // NetVin NV5000SC
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PCI::HardwareID { 0x1106, 0x0926 }, // Via 86C926
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PCI::HardwareID { 0x10bd, 0x0e34 }, // SureCom NE34
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PCI::HardwareID { 0x1050, 0x5a5a }, // Winbond W89C940F
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PCI::HardwareID { 0x12c3, 0x0058 }, // Holtek HT80232
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PCI::HardwareID { 0x12c3, 0x5598 }, // Holtek HT80229
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PCI::HardwareID { 0x8c4a, 0x1980 }, // Winbond W89C940 (misprogrammed)
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};
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if (!ne2k_ids.span().contains_slow(pci_device_identifier.hardware_id()))
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return nullptr;
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u8 irq = pci_device_identifier.interrupt_line().value();
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auto interface_name = TRY(NetworkingManagement::generate_interface_name_from_pci_address(pci_device_identifier));
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auto registers_io_window = TRY(IOWindow::create_for_pci_device_bar(pci_device_identifier, PCI::HeaderType0BaseRegister::BAR0));
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return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) NE2000NetworkAdapter(pci_device_identifier.address(), irq, move(registers_io_window), move(interface_name))));
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}
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UNMAP_AFTER_INIT NE2000NetworkAdapter::NE2000NetworkAdapter(PCI::Address address, u8 irq, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString> interface_name)
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: NetworkAdapter(move(interface_name))
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, PCI::Device(address)
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, IRQHandler(irq)
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, m_registers_io_window(move(registers_io_window))
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{
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dmesgln("NE2000: Found @ {}", pci_address());
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dmesgln("NE2000: Port base: {}", m_registers_io_window);
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dmesgln("NE2000: Interrupt line: {}", interrupt_number());
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int ram_errors = ram_test();
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dmesgln("NE2000: RAM test {}, got {} byte errors", (ram_errors == 0 ? "OK" : "KO"), ram_errors);
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reset();
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set_mac_address(m_mac_address);
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dmesgln("NE2000: MAC address: {}", m_mac_address.to_string());
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enable_irq();
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}
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UNMAP_AFTER_INIT NE2000NetworkAdapter::~NE2000NetworkAdapter() = default;
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bool NE2000NetworkAdapter::handle_irq(RegisterState const&)
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{
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u8 status = in8(REG_RW_INTERRUPTSTATUS);
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m_entropy_source.add_random_event(status);
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Got interrupt, status={:#02x}", status);
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if (status == 0) {
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return false;
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}
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if (status & BIT_INTERRUPTMASK_PRX) {
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Interrupt for packet received");
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}
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if (status & BIT_INTERRUPTMASK_PTX) {
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Interrupt for packet sent");
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}
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if (status & BIT_INTERRUPTMASK_RXE) {
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u8 fae = in8(REG_RD_FAE_TALLY);
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u8 crc = in8(REG_RD_CRC_TALLY);
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u8 miss = in8(REG_RD_MISS_PKT_TALLY);
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dmesgln("NE2000NetworkAdapter: Packet reception error framing={} crc={} missed={}", fae, crc, miss);
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// TODO: handle counters
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}
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if (status & BIT_INTERRUPTMASK_TXE) {
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dmesgln("NE2000NetworkAdapter: Packet transmission error");
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}
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if (status & BIT_INTERRUPTMASK_OVW) {
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dmesgln("NE2000NetworkAdapter: Ring buffer reception overflow error");
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// TODO: handle counters
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}
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if (status & BIT_INTERRUPTMASK_CNT) {
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dmesgln("NE2000NetworkAdapter: Counter overflow error");
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// TODO: handle counters
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}
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if (status & BIT_INTERRUPTMASK_RST) {
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dmesgln("NE2000NetworkAdapter: NIC requires reset due to packet reception overflow");
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// TODO: proper reset procedure
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reset();
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}
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receive();
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m_wait_queue.wake_all();
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out8(REG_RW_INTERRUPTSTATUS, status);
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return true;
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}
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UNMAP_AFTER_INIT int NE2000NetworkAdapter::ram_test()
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{
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int errors = 0;
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out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_STOP);
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_WTS);
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_BOS | BIT_DATACONFIGURATION_WTS);
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#else
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# error Unknown byte order
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#endif
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out8(REG_WR_REMOTEBYTECOUNT0, 0x00);
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out8(REG_WR_REMOTEBYTECOUNT1, 0x00);
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out8(REG_WR_RECEIVECONFIGURATION, BIT_RECEIVECONFIGURATION_MON);
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out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_START);
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Array<u8, NE2K_RAM_SIZE> buffer;
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const u8 patterns[3] = { 0x5a, 0xff, 0x00 };
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for (int i = 0; i < 3; ++i) {
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for (size_t j = 0; j < buffer.size(); ++j)
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buffer[j] = patterns[i];
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rdma_write(NE2K_RAM_BEGIN, buffer);
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rdma_read(NE2K_RAM_BEGIN, buffer);
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for (size_t j = 0; j < buffer.size(); ++j) {
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if (buffer[j] != patterns[i]) {
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if (errors < 16)
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Bad adapter RAM @ {} expected={} got={}", PhysicalAddress(NE2K_RAM_BEGIN + j), patterns[i], buffer[j]);
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else if (errors == 16)
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Too many RAM errors, silencing further output");
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errors++;
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}
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}
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}
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return errors;
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}
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void NE2000NetworkAdapter::reset()
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{
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const u8 interrupt_mask = BIT_INTERRUPTMASK_PRX | BIT_INTERRUPTMASK_PTX | BIT_INTERRUPTMASK_RXE | BIT_INTERRUPTMASK_TXE | BIT_INTERRUPTMASK_OVW | BIT_INTERRUPTMASK_CNT;
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u8 prom[32];
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// Taken from DP8390D's datasheet section 11.0, "Initialization Procedures"
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out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_STOP);
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_WTS);
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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out8(REG_WR_DATACONFIGURATION, BIT_DATACONFIGURATION_FIFO_8B | BIT_DATACONFIGURATION_BOS | BIT_DATACONFIGURATION_WTS);
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#else
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# error Unknown byte order
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#endif
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out8(REG_WR_REMOTEBYTECOUNT0, 0x00);
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out8(REG_WR_REMOTEBYTECOUNT1, 0x00);
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out8(REG_WR_RECEIVECONFIGURATION, BIT_RECEIVECONFIGURATION_AB | BIT_RECEIVECONFIGURATION_AR);
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out8(REG_WR_TRANSMITCONFIGURATION, BIT_WR_TRANSMITCONFIGURATION_LOOPBACK);
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m_ring_read_ptr = NE2K_RAM_RECV_BEGIN >> 8;
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out8(REG_WR_PAGESTART, NE2K_RAM_RECV_BEGIN >> 8);
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out8(REG_RW_BOUNDARY, NE2K_RAM_RECV_BEGIN >> 8);
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out8(REG_WR_PAGESTOP, NE2K_RAM_RECV_END >> 8);
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out8(REG_RW_INTERRUPTSTATUS, 0xff);
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out8(REG_WR_INTERRUPTMASK, interrupt_mask);
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rdma_read(0, Bytes(prom, sizeof(prom)));
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for (int i = 0; i < 6; i++) {
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m_mac_address[i] = prom[i * 2];
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}
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out8(REG_RW_COMMAND, BIT_COMMAND_PAGE1 | BIT_COMMAND_DMA_ABORT | BIT_COMMAND_STOP);
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for (int i = 0; i < 6; i++) {
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out8(REG_RW_PHYSICALADDRESS0 + i, m_mac_address[i]);
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}
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out8(REG_RW_CURRENT, NE2K_RAM_RECV_BEGIN >> 8);
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out8(REG_RW_COMMAND, BIT_COMMAND_DMA_ABORT | BIT_COMMAND_START);
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out8(REG_WR_TRANSMITCONFIGURATION, 0xe0);
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}
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void NE2000NetworkAdapter::rdma_read(size_t address, Bytes payload)
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{
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: DMA read @ {} length={}", PhysicalAddress(address), payload.size());
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u8 command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_PAGE_FIELD | BIT_COMMAND_DMA_FIELD);
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out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_ABORT);
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out8(REG_RW_INTERRUPTSTATUS, BIT_INTERRUPTMASK_RDC);
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out8(REG_WR_REMOTEBYTECOUNT0, payload.size());
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out8(REG_WR_REMOTEBYTECOUNT1, payload.size() >> 8);
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out8(REG_WR_REMOTESTARTADDRESS0, address);
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out8(REG_WR_REMOTESTARTADDRESS1, address >> 8);
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command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_DMA_FIELD);
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out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_READ);
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for (size_t i = 0; i < payload.size(); i += 2) {
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u16 data = in16(REG_RW_IOPORT);
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payload[i] = data;
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if (i != payload.size() - 1)
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payload[i + 1] = data >> 8;
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}
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while (!(in8(REG_RW_INTERRUPTSTATUS) & BIT_INTERRUPTMASK_RDC))
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;
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}
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void NE2000NetworkAdapter::rdma_write(size_t address, ReadonlyBytes payload)
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{
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: DMA write @ {} length={}", PhysicalAddress(address), payload.size());
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u8 command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_PAGE_FIELD | BIT_COMMAND_DMA_FIELD);
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out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_ABORT);
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out8(REG_RW_INTERRUPTSTATUS, BIT_INTERRUPTMASK_RDC);
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out8(REG_WR_REMOTEBYTECOUNT0, payload.size());
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out8(REG_WR_REMOTEBYTECOUNT1, payload.size() >> 8);
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out8(REG_WR_REMOTESTARTADDRESS0, address);
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out8(REG_WR_REMOTESTARTADDRESS1, address >> 8);
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command = in8(REG_RW_COMMAND) & ~(BIT_COMMAND_DMA_FIELD);
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out8(REG_RW_COMMAND, command | BIT_COMMAND_DMA_WRITE);
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for (size_t i = 0; i < payload.size(); i += 2) {
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u16 data = payload[i];
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if (i != payload.size() - 1)
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data |= payload[i + 1] << 8;
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out16(REG_RW_IOPORT, data);
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}
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while (!(in8(REG_RW_INTERRUPTSTATUS) & BIT_INTERRUPTMASK_RDC))
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;
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}
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void NE2000NetworkAdapter::send_raw(ReadonlyBytes payload)
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{
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dbgln_if(NE2000_DEBUG, "NE2000NetworkAdapter: Sending packet length={}", payload.size());
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if (payload.size() > NE2K_RAM_SEND_SIZE) {
|
|
dmesgln("NE2000NetworkAdapter: Packet to send was too big; discarding");
|
|
return;
|
|
}
|
|
|
|
while (in8(REG_RW_COMMAND) & BIT_COMMAND_TXP)
|
|
m_wait_queue.wait_forever("NE2000NetworkAdapter"sv);
|
|
|
|
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);
|
|
}
|
|
|
|
}
|