1/*
2 * This file is based on code from OCTEON SDK by Cavium Networks.
3 *
4 * Copyright (c) 2003-2007 Cavium Networks
5 *
6 * This file is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, Version 2, as
8 * published by the Free Software Foundation.
9 */
10
11/*
12 * A few defines are used to control the operation of this driver:
13 *  USE_ASYNC_IOBDMA
14 *      Use asynchronous IO access to hardware. This uses Octeon's asynchronous
15 *      IOBDMAs to issue IO accesses without stalling. Set this to zero
16 *      to disable this. Note that IOBDMAs require CVMSEG.
17 *  REUSE_SKBUFFS_WITHOUT_FREE
18 *      Allows the TX path to free an skbuff into the FPA hardware pool. This
19 *      can significantly improve performance for forwarding and bridging, but
20 *      may be somewhat dangerous. Checks are made, but if any buffer is reused
21 *      without the proper Linux cleanup, the networking stack may have very
22 *      bizarre bugs.
23 */
24#ifndef __ETHERNET_DEFINES_H__
25#define __ETHERNET_DEFINES_H__
26
27#include <asm/octeon/cvmx-config.h>
28
29#ifdef CONFIG_NETFILTER
30#define REUSE_SKBUFFS_WITHOUT_FREE  0
31#else
32#define REUSE_SKBUFFS_WITHOUT_FREE  1
33#endif
34
35#define USE_ASYNC_IOBDMA            (CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0)
36
37/* Maximum number of SKBs to try to free per xmit packet. */
38#define MAX_OUT_QUEUE_DEPTH 1000
39
40#define FAU_TOTAL_TX_TO_CLEAN (CVMX_FAU_REG_END - sizeof(u32))
41#define FAU_NUM_PACKET_BUFFERS_TO_FREE (FAU_TOTAL_TX_TO_CLEAN - sizeof(u32))
42
43#define TOTAL_NUMBER_OF_PORTS       (CVMX_PIP_NUM_INPUT_PORTS+1)
44
45#endif /* __ETHERNET_DEFINES_H__ */
46