1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* 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 E1000NetworkAdapter : public NetworkAdapter
, public PCI::Device
, public IRQHandler {
public:
static ErrorOr<bool> probe(PCI::DeviceIdentifier const&);
static ErrorOr<NonnullRefPtr<NetworkAdapter>> create(PCI::DeviceIdentifier const&);
virtual ErrorOr<void> initialize(Badge<NetworkingManagement>) override;
virtual ~E1000NetworkAdapter() override;
virtual void send_raw(ReadonlyBytes) override;
virtual bool link_up() override { return m_link_up; };
virtual i32 link_speed() override;
virtual bool link_full_duplex() override;
virtual StringView purpose() const override { return class_name(); }
virtual StringView device_name() const override { return "E1000"sv; }
virtual Type adapter_type() const override { return Type::Ethernet; }
protected:
static constexpr size_t rx_buffer_size = 8192;
static constexpr size_t tx_buffer_size = 8192;
void setup_interrupts();
void setup_link();
E1000NetworkAdapter(PCI::DeviceIdentifier const&, u8 irq,
NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<Memory::Region> rx_buffer_region,
NonnullOwnPtr<Memory::Region> tx_buffer_region, NonnullOwnPtr<Memory::Region> rx_descriptors_region,
NonnullOwnPtr<Memory::Region> tx_descriptors_region, NonnullOwnPtr<KString>);
virtual bool handle_irq(RegisterState const&) override;
virtual StringView class_name() const override { return "E1000NetworkAdapter"sv; }
struct [[gnu::packed]] e1000_rx_desc {
volatile uint64_t addr { 0 };
volatile uint16_t length { 0 };
volatile uint16_t checksum { 0 };
volatile uint8_t status { 0 };
volatile uint8_t errors { 0 };
volatile uint16_t special { 0 };
};
struct [[gnu::packed]] e1000_tx_desc {
volatile uint64_t addr { 0 };
volatile uint16_t length { 0 };
volatile uint8_t cso { 0 };
volatile uint8_t cmd { 0 };
volatile uint8_t status { 0 };
volatile uint8_t css { 0 };
volatile uint16_t special { 0 };
};
virtual void detect_eeprom();
virtual u32 read_eeprom(u8 address);
void read_mac_address();
void initialize_rx_descriptors();
void initialize_tx_descriptors();
void out8(u16 address, u8);
void out16(u16 address, u16);
void out32(u16 address, u32);
u8 in8(u16 address);
u16 in16(u16 address);
u32 in32(u16 address);
void receive();
static constexpr size_t number_of_rx_descriptors = 256;
static constexpr size_t number_of_tx_descriptors = 256;
NonnullOwnPtr<IOWindow> m_registers_io_window;
NonnullOwnPtr<Memory::Region> m_rx_descriptors_region;
NonnullOwnPtr<Memory::Region> m_tx_descriptors_region;
NonnullOwnPtr<Memory::Region> m_rx_buffer_region;
NonnullOwnPtr<Memory::Region> m_tx_buffer_region;
Array<void*, number_of_rx_descriptors> m_rx_buffers;
Array<void*, number_of_tx_descriptors> m_tx_buffers;
bool m_has_eeprom { false };
bool m_link_up { false };
EntropySource m_entropy_source;
WaitQueue m_wait_queue;
};
}
|
