1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * This file is based on code from OCTEON SDK by Cavium Networks. 4 * 5 * Copyright (c) 2003-2007 Cavium Networks 6 */ 7 8 /* 9 * A few defines are used to control the operation of this driver: 10 * USE_ASYNC_IOBDMA 11 * Use asynchronous IO access to hardware. This uses Octeon's asynchronous 12 * IOBDMAs to issue IO accesses without stalling. Set this to zero 13 * to disable this. Note that IOBDMAs require CVMSEG. 14 * REUSE_SKBUFFS_WITHOUT_FREE 15 * Allows the TX path to free an skbuff into the FPA hardware pool. This 16 * can significantly improve performance for forwarding and bridging, but 17 * may be somewhat dangerous. Checks are made, but if any buffer is reused 18 * without the proper Linux cleanup, the networking stack may have very 19 * bizarre bugs. 20 */ 21 #ifndef __ETHERNET_DEFINES_H__ 22 #define __ETHERNET_DEFINES_H__ 23 24 #ifdef CONFIG_NETFILTER 25 #define REUSE_SKBUFFS_WITHOUT_FREE 0 26 #else 27 #define REUSE_SKBUFFS_WITHOUT_FREE 1 28 #endif 29 30 #define USE_ASYNC_IOBDMA (CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0) 31 32 /* Maximum number of SKBs to try to free per xmit packet. */ 33 #define MAX_OUT_QUEUE_DEPTH 1000 34 35 #define FAU_TOTAL_TX_TO_CLEAN (CVMX_FAU_REG_END - sizeof(u32)) 36 #define FAU_NUM_PACKET_BUFFERS_TO_FREE (FAU_TOTAL_TX_TO_CLEAN - sizeof(u32)) 37 38 #define TOTAL_NUMBER_OF_PORTS (CVMX_PIP_NUM_INPUT_PORTS + 1) 39 40 #endif /* __ETHERNET_DEFINES_H__ */