ethernet-defines.h

 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__ */