diff options
Diffstat (limited to 'src/class/net/ncm.h')
| -rw-r--r-- | src/class/net/ncm.h | 50 |
1 files changed, 28 insertions, 22 deletions
diff --git a/src/class/net/ncm.h b/src/class/net/ncm.h index c768192a5..cf4daf96c 100644 --- a/src/class/net/ncm.h +++ b/src/class/net/ncm.h @@ -2,6 +2,7 @@ * 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 @@ -29,42 +30,47 @@ #define _TUSB_NCM_H_ #include "common/tusb_common.h" - +#include "lwipopts.h" #ifndef CFG_TUD_NCM_IN_NTB_MAX_SIZE - /// must be >> MTU - #define CFG_TUD_NCM_IN_NTB_MAX_SIZE 3200 + #define CFG_TUD_NCM_IN_NTB_MAX_SIZE (2 * TCP_MSS + 100) #endif #ifndef CFG_TUD_NCM_OUT_NTB_MAX_SIZE - /// must be >> MTU - #define CFG_TUD_NCM_OUT_NTB_MAX_SIZE 3200 + #define CFG_TUD_NCM_OUT_NTB_MAX_SIZE (2 * TCP_MSS + 100) #endif #ifndef CFG_TUD_NCM_OUT_NTB_N - /// number of ntb buffers for reception side - /// 1 - good performance - /// 2 - up to 30% more performance with iperf with small packets - /// >2 - no performance gain - #define CFG_TUD_NCM_OUT_NTB_N 2 + /// number of NTB buffers for reception side + /// 1 - good performance + /// 2 - up to 30% more performance with iperf with small packets + /// >2 - no performance gain + /// -> for performance optimizations this parameter could be increased with the cost of additional RAM requirements + #define CFG_TUD_NCM_OUT_NTB_N 1 #endif #ifndef CFG_TUD_NCM_IN_NTB_N - /// number of ntb buffers for transmission side - /// 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 - /// >2 - no performance gain - #define CFG_TUD_NCM_IN_NTB_N 3 + /// number of NTB buffers for transmission side + /// 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 + /// >2 - no performance gain + /// -> for performance optimizations this parameter could be increased with the cost of additional RAM requirements + #define CFG_TUD_NCM_IN_NTB_N 1 +#endif + +#ifndef CFG_TUD_NCM_IN_MAX_DATAGRAMS_PER_NTB + /// this is for the transmission side for allocation of \a ndp16_datagram_t + #define CFG_TUD_NCM_IN_MAX_DATAGRAMS_PER_NTB 8 #endif -#ifndef CFG_TUD_NCM_MAX_DATAGRAMS_PER_NTB - /// this is for the transmission size for allocation of \a ndp16_datagram_t - #define CFG_TUD_NCM_MAX_DATAGRAMS_PER_NTB 8 +#ifndef CFG_TUD_NCM_OUT_MAX_DATAGRAMS_PER_NTB + /// this tells the host how many datagrams it is allowed to put into an NTB + #define CFG_TUD_NCM_OUT_MAX_DATAGRAMS_PER_NTB 6 #endif #ifndef CFG_TUD_NCM_ALIGNMENT - #define CFG_TUD_NCM_ALIGNMENT 4 + #define CFG_TUD_NCM_ALIGNMENT 4 #endif #if (CFG_TUD_NCM_ALIGNMENT != 4) #error "CFG_TUD_NCM_ALIGNMENT must be 4, otherwise the headers and start of datagrams have to be aligned (which they are currently not)" @@ -136,7 +142,7 @@ typedef union TU_ATTR_PACKED { struct { nth16_t nth; ndp16_t ndp; - ndp16_datagram_t ndp_datagram[CFG_TUD_NCM_MAX_DATAGRAMS_PER_NTB + 1]; + 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; |