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 *  USE_SKBUFFS_IN_HW
37 *      Tells the driver to populate the packet buffers with kernel skbuffs.
38 *      This allows the driver to receive packets without copying them. It also
39 *      means that 32bit userspace can't access the packet buffers.
40 *  USE_HW_TCPUDP_CHECKSUM
41 *      Controls if the Octeon TCP/UDP checksum engine is used for packet
42 *      output. If this is zero, the kernel will perform the checksum in
43 *      software.
44 *  USE_ASYNC_IOBDMA
45 *      Use asynchronous IO access to hardware. This uses Octeon's asynchronous
46 *      IOBDMAs to issue IO accesses without stalling. Set this to zero
47 *      to disable this. Note that IOBDMAs require CVMSEG.
48 *  REUSE_SKBUFFS_WITHOUT_FREE
49 *      Allows the TX path to free an skbuff into the FPA hardware pool. This
50 *      can significantly improve performance for forwarding and bridging, but
51 *      may be somewhat dangerous. Checks are made, but if any buffer is reused
52 *      without the proper Linux cleanup, the networking stack may have very
53 *      bizarre bugs.
54 */
55#ifndef __ETHERNET_DEFINES_H__
56#define __ETHERNET_DEFINES_H__
57
58#include <asm/octeon/cvmx-config.h>
59
60
61#define OCTEON_ETHERNET_VERSION "1.9"
62
63#ifndef CONFIG_CAVIUM_RESERVE32
64#define CONFIG_CAVIUM_RESERVE32 0
65#endif
66
67#define USE_SKBUFFS_IN_HW           1
68#ifdef CONFIG_NETFILTER
69#define REUSE_SKBUFFS_WITHOUT_FREE  0
70#else
71#define REUSE_SKBUFFS_WITHOUT_FREE  1
72#endif
73
74#define USE_HW_TCPUDP_CHECKSUM      1
75
76/* Enable Random Early Dropping under load */
77#define USE_RED                     1
78#define USE_ASYNC_IOBDMA            (CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0)
79
80/*
81 * Allow SW based preamble removal at 10Mbps to workaround PHYs giving
82 * us bad preambles.
83 */
84#define USE_10MBPS_PREAMBLE_WORKAROUND 1
85/*
86 * Use this to have all FPA frees also tell the L2 not to write data
87 * to memory.
88 */
89#define DONT_WRITEBACK(x)           (x)
90/* Use this to not have FPA frees control L2 */
91/*#define DONT_WRITEBACK(x)         0   */
92
93/* Maximum number of SKBs to try to free per xmit packet. */
94#define MAX_OUT_QUEUE_DEPTH 1000
95
96#define FAU_TOTAL_TX_TO_CLEAN (CVMX_FAU_REG_END - sizeof(uint32_t))
97#define FAU_NUM_PACKET_BUFFERS_TO_FREE (FAU_TOTAL_TX_TO_CLEAN - sizeof(uint32_t))
98
99#define TOTAL_NUMBER_OF_PORTS       (CVMX_PIP_NUM_INPUT_PORTS+1)
100
101
102#endif /* __ETHERNET_DEFINES_H__ */
103