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 * CONFIG_CAVIUM_RESERVE32 31 * This kernel config options controls the amount of memory configured 32 * in a wired TLB entry for all processes to share. If this is set, the 33 * driver will use this memory instead of kernel memory for pools. This 34 * allows 32bit userspace application to access the buffers, but also 35 * requires all received packets to be copied. 36 * CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS 37 * This kernel config option allows the user to control the number of 38 * packet and work queue buffers allocated by the driver. If this is zero, 39 * the driver uses the default from below. 40 * USE_SKBUFFS_IN_HW 41 * Tells the driver to populate the packet buffers with kernel skbuffs. 42 * This allows the driver to receive packets without copying them. It also 43 * means that 32bit userspace can't access the packet buffers. 44 * USE_32BIT_SHARED 45 * This define tells the driver to allocate memory for buffers from the 46 * 32bit sahred region instead of the kernel memory space. 47 * USE_HW_TCPUDP_CHECKSUM 48 * Controls if the Octeon TCP/UDP checksum engine is used for packet 49 * output. If this is zero, the kernel will perform the checksum in 50 * software. 51 * USE_MULTICORE_RECEIVE 52 * Process receive interrupts on multiple cores. This spreads the network 53 * load across the first 8 processors. If ths is zero, only one core 54 * processes incomming packets. 55 * USE_ASYNC_IOBDMA 56 * Use asynchronous IO access to hardware. This uses Octeon's asynchronous 57 * IOBDMAs to issue IO accesses without stalling. Set this to zero 58 * to disable this. Note that IOBDMAs require CVMSEG. 59 * REUSE_SKBUFFS_WITHOUT_FREE 60 * Allows the TX path to free an skbuff into the FPA hardware pool. This 61 * can significantly improve performance for forwarding and bridging, but 62 * may be somewhat dangerous. Checks are made, but if any buffer is reused 63 * without the proper Linux cleanup, the networking stack may have very 64 * bizarre bugs. 65 */ 66 #ifndef __ETHERNET_DEFINES_H__ 67 #define __ETHERNET_DEFINES_H__ 68 69 #include "cvmx-config.h" 70 71 72 #define OCTEON_ETHERNET_VERSION "1.9" 73 74 #ifndef CONFIG_CAVIUM_RESERVE32 75 #define CONFIG_CAVIUM_RESERVE32 0 76 #endif 77 78 #if CONFIG_CAVIUM_RESERVE32 79 #define USE_32BIT_SHARED 1 80 #define USE_SKBUFFS_IN_HW 0 81 #define REUSE_SKBUFFS_WITHOUT_FREE 0 82 #else 83 #define USE_32BIT_SHARED 0 84 #define USE_SKBUFFS_IN_HW 1 85 #ifdef CONFIG_NETFILTER 86 #define REUSE_SKBUFFS_WITHOUT_FREE 0 87 #else 88 #define REUSE_SKBUFFS_WITHOUT_FREE 1 89 #endif 90 #endif 91 92 /* Max interrupts per second per core */ 93 #define INTERRUPT_LIMIT 10000 94 95 /* Don't limit the number of interrupts */ 96 /*#define INTERRUPT_LIMIT 0 */ 97 #define USE_HW_TCPUDP_CHECKSUM 1 98 99 #define USE_MULTICORE_RECEIVE 1 100 101 /* Enable Random Early Dropping under load */ 102 #define USE_RED 1 103 #define USE_ASYNC_IOBDMA (CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0) 104 105 /* 106 * Allow SW based preamble removal at 10Mbps to workaround PHYs giving 107 * us bad preambles. 108 */ 109 #define USE_10MBPS_PREAMBLE_WORKAROUND 1 110 /* 111 * Use this to have all FPA frees also tell the L2 not to write data 112 * to memory. 113 */ 114 #define DONT_WRITEBACK(x) (x) 115 /* Use this to not have FPA frees control L2 */ 116 /*#define DONT_WRITEBACK(x) 0 */ 117 118 /* Maximum number of packets to process per interrupt. */ 119 #define MAX_RX_PACKETS 120 120 #define MAX_OUT_QUEUE_DEPTH 1000 121 122 #ifndef CONFIG_SMP 123 #undef USE_MULTICORE_RECEIVE 124 #define USE_MULTICORE_RECEIVE 0 125 #endif 126 127 #define IP_PROTOCOL_TCP 6 128 #define IP_PROTOCOL_UDP 0x11 129 130 #define FAU_NUM_PACKET_BUFFERS_TO_FREE (CVMX_FAU_REG_END - sizeof(uint32_t)) 131 #define TOTAL_NUMBER_OF_PORTS (CVMX_PIP_NUM_INPUT_PORTS+1) 132 133 134 #endif /* __ETHERNET_DEFINES_H__ */ 135