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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* SPDX-FileCopyrightText: Copyright (c) 2021, Ha Thach (tinyusb.org)
* SPDX-FileCopyrightText: Copyright (c) 2024, Hardy Griech
* SPDX-License-Identifier: MIT
*
* This file is part of the TinyUSB stack.
*/
#ifndef TUSB_NCM_H_
#define TUSB_NCM_H_
#include "common/tusb_common.h"
// NTB buffers size for reception side, must be >> MTU to avoid TCP retransmission (driver issue ?)
// Linux use 2048 as minimal size
#ifndef CFG_TUD_NCM_OUT_NTB_MAX_SIZE
#define CFG_TUD_NCM_OUT_NTB_MAX_SIZE 3200
#endif
// NTB buffers size for reception side, must be > MTU
// Linux use 2048 as minimal size
#ifndef CFG_TUD_NCM_IN_NTB_MAX_SIZE
#define CFG_TUD_NCM_IN_NTB_MAX_SIZE 3200
#endif
// Number of NTB buffers for reception side
// Depending on the configuration, this parameter could be increased with the cost of additional RAM requirements
// On Full-Speed (RP2040) :
// 1 - good performance
// 2 - up to 30% more performance with iperf with small packets
// >2 - no performance gain
// On High-Speed (STM32F7) :
// No performance gain
#ifndef CFG_TUD_NCM_OUT_NTB_N
#define CFG_TUD_NCM_OUT_NTB_N 1
#endif
// Number of NTB buffers for transmission side
// Depending on the configuration, this parameter could be increased with the cost of additional RAM requirements
// On Full-Speed (RP2040) :
// 1 - good performance but SystemView shows lost events (on load test)
// 2 - up to 50% more performance with iperf with small packets, "tud_network_can_xmit: request blocked"
// happens from time to time with SystemView
// 3 - "tud_network_can_xmit: request blocked" never happens
// >3 - no performance gain
// On High-Speed (STM32F7) :
// No performance gain
#ifndef CFG_TUD_NCM_IN_NTB_N
#define CFG_TUD_NCM_IN_NTB_N 1
#endif
// How many datagrams it is allowed to put into an NTB for transmission side
#ifndef CFG_TUD_NCM_IN_MAX_DATAGRAMS_PER_NTB
#define CFG_TUD_NCM_IN_MAX_DATAGRAMS_PER_NTB 8
#endif
// This tells the host how many datagrams it is allowed to put into an NTB
#ifndef CFG_TUD_NCM_OUT_MAX_DATAGRAMS_PER_NTB
#define CFG_TUD_NCM_OUT_MAX_DATAGRAMS_PER_NTB 6
#endif
// Table 6.2 Class-Specific Request Codes for Network Control Model subclass
typedef enum
{
NCM_SET_ETHERNET_MULTICAST_FILTERS = 0x40,
NCM_SET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER = 0x41,
NCM_GET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER = 0x42,
NCM_SET_ETHERNET_PACKET_FILTER = 0x43,
NCM_GET_ETHERNET_STATISTIC = 0x44,
NCM_GET_NTB_PARAMETERS = 0x80,
NCM_GET_NET_ADDRESS = 0x81,
NCM_SET_NET_ADDRESS = 0x82,
NCM_GET_NTB_FORMAT = 0x83,
NCM_SET_NTB_FORMAT = 0x84,
NCM_GET_NTB_INPUT_SIZE = 0x85,
NCM_SET_NTB_INPUT_SIZE = 0x86,
NCM_GET_MAX_DATAGRAM_SIZE = 0x87,
NCM_SET_MAX_DATAGRAM_SIZE = 0x88,
NCM_GET_CRC_MODE = 0x89,
NCM_SET_CRC_MODE = 0x8A,
} ncm_request_code_t;
#define NTH16_SIGNATURE 0x484D434E
#define NDP16_SIGNATURE_NCM0 0x304D434E
#define NDP16_SIGNATURE_NCM1 0x314D434E
typedef struct TU_ATTR_PACKED {
uint16_t wLength;
uint16_t bmNtbFormatsSupported;
uint32_t dwNtbInMaxSize;
uint16_t wNdbInDivisor;
uint16_t wNdbInPayloadRemainder;
uint16_t wNdbInAlignment;
uint16_t wReserved;
uint32_t dwNtbOutMaxSize;
uint16_t wNdbOutDivisor;
uint16_t wNdbOutPayloadRemainder;
uint16_t wNdbOutAlignment;
uint16_t wNtbOutMaxDatagrams;
} ntb_parameters_t;
typedef struct TU_ATTR_PACKED {
uint32_t dwSignature;
uint16_t wHeaderLength;
uint16_t wSequence;
uint16_t wBlockLength;
uint16_t wNdpIndex;
} nth16_t;
typedef struct TU_ATTR_PACKED {
uint16_t wDatagramIndex;
uint16_t wDatagramLength;
} ndp16_datagram_t;
typedef struct TU_ATTR_PACKED {
uint32_t dwSignature;
uint16_t wLength;
uint16_t wNextNdpIndex;
//ndp16_datagram_t datagram[];
} ndp16_t;
typedef union TU_ATTR_PACKED {
struct {
nth16_t nth;
ndp16_t ndp;
ndp16_datagram_t ndp_datagram[CFG_TUD_NCM_IN_MAX_DATAGRAMS_PER_NTB + 1];
};
uint8_t data[CFG_TUD_NCM_IN_NTB_MAX_SIZE];
} xmit_ntb_t;
typedef union TU_ATTR_PACKED {
struct {
nth16_t nth;
// only the header is at a guaranteed position
};
uint8_t data[CFG_TUD_NCM_OUT_NTB_MAX_SIZE];
} recv_ntb_t;
typedef struct {
tusb_control_request_t header;
uint32_t downlink;
uint32_t uplink;
} ncm_notify_t;
typedef struct TU_ATTR_PACKED {
uint8_t bFunctionLength;
uint8_t bDescriptorType;
uint8_t bDescriptorSubType;
uint16_t bcdNcmVersion;
uint8_t bmCapabilities;
} tusb_desc_cdc_ncm_func_t;
typedef struct TU_ATTR_PACKED {
uint32_t dwNtbInMaxSize;
uint16_t wNtbInMaxDatagrams;
uint16_t wReserved;
} ncm_ntb_input_size_t;
#endif
|
