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/*
* The MIT License (MIT)
*
* Copyright (c) 2021, Ha Thach (tinyusb.org)
* Copyright (c) 2024, Hardy Griech
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* 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
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