109 lines
3 KiB
C++
109 lines
3 KiB
C++
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/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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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/Debug.h>
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#include <Kernel/Net/E1000ENetworkAdapter.h>
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#include <Kernel/PCI/IDs.h>
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namespace Kernel {
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#define REG_EEPROM 0x0014
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static bool is_valid_device_id(u16 device_id)
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{
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switch (device_id) {
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case 0x10D3: // 82574
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return true;
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default:
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return false;
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}
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}
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UNMAP_AFTER_INIT RefPtr<E1000ENetworkAdapter> E1000ENetworkAdapter::try_to_initialize(PCI::Address address)
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{
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auto id = PCI::get_id(address);
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if (id.vendor_id != (u16)PCIVendorID::Intel)
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return {};
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if (!is_valid_device_id(id.device_id))
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return {};
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u8 irq = PCI::get_interrupt_line(address);
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auto adapter = adopt_ref_if_nonnull(new E1000ENetworkAdapter(address, irq));
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if (!adapter)
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return {};
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if (adapter->initialize())
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return adapter;
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return {};
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}
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UNMAP_AFTER_INIT bool E1000ENetworkAdapter::initialize()
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{
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dmesgln("E1000e: Found @ {}", pci_address());
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m_io_base = IOAddress(PCI::get_BAR2(pci_address()) & ~1);
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enable_bus_mastering(pci_address());
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size_t mmio_base_size = PCI::get_BAR_space_size(pci_address(), 0);
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m_mmio_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of(PCI::get_BAR0(pci_address()))), page_round_up(mmio_base_size), "E1000e MMIO", Region::Access::Read | Region::Access::Write, Region::Cacheable::No);
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if (!m_mmio_region)
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return false;
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m_mmio_base = m_mmio_region->vaddr();
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m_use_mmio = true;
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m_interrupt_line = PCI::get_interrupt_line(pci_address());
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dmesgln("E1000e: port base: {}", m_io_base);
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dmesgln("E1000e: MMIO base: {}", PhysicalAddress(PCI::get_BAR0(pci_address()) & 0xfffffffc));
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dmesgln("E1000e: MMIO base size: {} bytes", mmio_base_size);
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dmesgln("E1000e: Interrupt line: {}", m_interrupt_line);
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detect_eeprom();
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dmesgln("E1000e: Has EEPROM? {}", m_has_eeprom);
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read_mac_address();
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const auto& mac = mac_address();
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dmesgln("E1000e: MAC address: {}", mac.to_string());
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initialize_rx_descriptors();
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initialize_tx_descriptors();
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setup_link();
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setup_interrupts();
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return true;
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}
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UNMAP_AFTER_INIT E1000ENetworkAdapter::E1000ENetworkAdapter(PCI::Address address, u8 irq)
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: E1000NetworkAdapter(address, irq)
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{
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}
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UNMAP_AFTER_INIT E1000ENetworkAdapter::~E1000ENetworkAdapter()
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{
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}
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UNMAP_AFTER_INIT void E1000ENetworkAdapter::detect_eeprom()
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{
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// FIXME: Try to find a way to detect if EEPROM exists instead of assuming it is
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m_has_eeprom = true;
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}
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UNMAP_AFTER_INIT u32 E1000ENetworkAdapter::read_eeprom(u8 address)
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{
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VERIFY(m_has_eeprom);
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u16 data = 0;
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u32 tmp = 0;
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if (m_has_eeprom) {
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out32(REG_EEPROM, ((u32)address << 2) | 1);
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while (!((tmp = in32(REG_EEPROM)) & (1 << 1)))
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;
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} else {
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out32(REG_EEPROM, ((u32)address << 2) | 1);
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while (!((tmp = in32(REG_EEPROM)) & (1 << 1)))
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;
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}
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data = (tmp >> 16) & 0xffff;
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return data;
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}
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}
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