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/Ethereal-msm8939-beta9/arch/mips/cavium-octeon/executive/cvmx-helper-loop.c

https://bitbucket.org/MilosStamenkovic95/etherealos
C | 85 lines | 26 code | 7 blank | 52 comment | 1 complexity | f15500991c80a845bcb68b4ae1a5db98 MD5 | raw file
 1/***********************license start***************
 2 * Author: Cavium Networks
 3 *
 4 * Contact: support@caviumnetworks.com
 5 * This file is part of the OCTEON SDK
 6 *
 7 * Copyright (c) 2003-2008 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 ***********************license end**************************************/
27
28/*
29 * Functions for LOOP initialization, configuration,
30 * and monitoring.
31 */
32#include <asm/octeon/octeon.h>
33
34#include <asm/octeon/cvmx-config.h>
35
36#include <asm/octeon/cvmx-helper.h>
37#include <asm/octeon/cvmx-pip-defs.h>
38
39/**
40 * Probe a LOOP interface and determine the number of ports
41 * connected to it. The LOOP interface should still be down
42 * after this call.
43 *
44 * @interface: Interface to probe
45 *
46 * Returns Number of ports on the interface. Zero to disable.
47 */
48int __cvmx_helper_loop_probe(int interface)
49{
50	union cvmx_ipd_sub_port_fcs ipd_sub_port_fcs;
51	int num_ports = 4;
52	int port;
53
54	/* We need to disable length checking so packet < 64 bytes and jumbo
55	   frames don't get errors */
56	for (port = 0; port < num_ports; port++) {
57		union cvmx_pip_prt_cfgx port_cfg;
58		int ipd_port = cvmx_helper_get_ipd_port(interface, port);
59		port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
60		port_cfg.s.maxerr_en = 0;
61		port_cfg.s.minerr_en = 0;
62		cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64);
63	}
64
65	/* Disable FCS stripping for loopback ports */
66	ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS);
67	ipd_sub_port_fcs.s.port_bit2 = 0;
68	cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
69	return num_ports;
70}
71
72/**
73 * Bringup and enable a LOOP interface. After this call packet
74 * I/O should be fully functional. This is called with IPD
75 * enabled but PKO disabled.
76 *
77 * @interface: Interface to bring up
78 *
79 * Returns Zero on success, negative on failure
80 */
81int __cvmx_helper_loop_enable(int interface)
82{
83	/* Do nothing. */
84	return 0;
85}