1 /********************************************************************** 2 * Author: Cavium Networks 3 * 4 * Contact: support@caviumnetworks.com 5 * This file is part of the OCTEON SDK 6 * 7 * Copyright (c) 2003-2007 Cavium Networks 8 * 9 * This file is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License, Version 2, as 11 * published by the Free Software Foundation. 12 * 13 * This file is distributed in the hope that it will be useful, but 14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16 * NONINFRINGEMENT. See the GNU General Public License for more 17 * details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this file; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 * or visit http://www.gnu.org/licenses/. 23 * 24 * This file may also be available under a different license from Cavium. 25 * Contact Cavium Networks for more information 26 **********************************************************************/ 27 28 /* 29 * A few defines are used to control the operation of this driver: 30 * USE_SKBUFFS_IN_HW 31 * Tells the driver to populate the packet buffers with kernel skbuffs. 32 * This allows the driver to receive packets without copying them. It also 33 * means that 32bit userspace can't access the packet buffers. 34 * USE_HW_TCPUDP_CHECKSUM 35 * Controls if the Octeon TCP/UDP checksum engine is used for packet 36 * output. If this is zero, the kernel will perform the checksum in 37 * software. 38 * USE_ASYNC_IOBDMA 39 * Use asynchronous IO access to hardware. This uses Octeon's asynchronous 40 * IOBDMAs to issue IO accesses without stalling. Set this to zero 41 * to disable this. Note that IOBDMAs require CVMSEG. 42 * REUSE_SKBUFFS_WITHOUT_FREE 43 * Allows the TX path to free an skbuff into the FPA hardware pool. This 44 * can significantly improve performance for forwarding and bridging, but 45 * may be somewhat dangerous. Checks are made, but if any buffer is reused 46 * without the proper Linux cleanup, the networking stack may have very 47 * bizarre bugs. 48 */ 49 #ifndef __ETHERNET_DEFINES_H__ 50 #define __ETHERNET_DEFINES_H__ 51 52 #include <asm/octeon/cvmx-config.h> 53 54 55 #define OCTEON_ETHERNET_VERSION "1.9" 56 57 #define USE_SKBUFFS_IN_HW 1 58 #ifdef CONFIG_NETFILTER 59 #define REUSE_SKBUFFS_WITHOUT_FREE 0 60 #else 61 #define REUSE_SKBUFFS_WITHOUT_FREE 1 62 #endif 63 64 #define USE_HW_TCPUDP_CHECKSUM 1 65 66 /* Enable Random Early Dropping under load */ 67 #define USE_RED 1 68 #define USE_ASYNC_IOBDMA (CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0) 69 70 /* 71 * Allow SW based preamble removal at 10Mbps to workaround PHYs giving 72 * us bad preambles. 73 */ 74 #define USE_10MBPS_PREAMBLE_WORKAROUND 1 75 /* 76 * Use this to have all FPA frees also tell the L2 not to write data 77 * to memory. 78 */ 79 #define DONT_WRITEBACK(x) (x) 80 /* Use this to not have FPA frees control L2 */ 81 /*#define DONT_WRITEBACK(x) 0 */ 82 83 /* Maximum number of SKBs to try to free per xmit packet. */ 84 #define MAX_OUT_QUEUE_DEPTH 1000 85 86 #define FAU_TOTAL_TX_TO_CLEAN (CVMX_FAU_REG_END - sizeof(uint32_t)) 87 #define FAU_NUM_PACKET_BUFFERS_TO_FREE (FAU_TOTAL_TX_TO_CLEAN - sizeof(uint32_t)) 88 89 #define TOTAL_NUMBER_OF_PORTS (CVMX_PIP_NUM_INPUT_PORTS+1) 90 91 92 #endif /* __ETHERNET_DEFINES_H__ */ 93