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/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (c) 2003-2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/
/*
* Functions for LOOP initialization, configuration,
* and monitoring.
*/
#include <asm/octeon/octeon.h>
#include "cvmx-config.h"
#include "cvmx-helper.h"
#include "cvmx-pip-defs.h"
/**
* Probe a LOOP interface and determine the number of ports
* connected to it. The LOOP interface should still be down
* after this call.
*
* @interface: Interface to probe
*
* Returns Number of ports on the interface. Zero to disable.
*/
int __cvmx_helper_loop_probe(int interface)
{
union cvmx_ipd_sub_port_fcs ipd_sub_port_fcs;
int num_ports = 4;
int port;
/* We need to disable length checking so packet < 64 bytes and jumbo
frames don't get errors */
for (port = 0; port < num_ports; port++) {
union cvmx_pip_prt_cfgx port_cfg;
int ipd_port = cvmx_helper_get_ipd_port(interface, port);
port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
port_cfg.s.maxerr_en = 0;
port_cfg.s.minerr_en = 0;
cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64);
}
/* Disable FCS stripping for loopback ports */
ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS);
ipd_sub_port_fcs.s.port_bit2 = 0;
cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
return num_ports;
}
/**
* Bringup and enable a LOOP interface. After this call packet
* I/O should be fully functional. This is called with IPD
* enabled but PKO disabled.
*
* @interface: Interface to bring up
*
* Returns Zero on success, negative on failure
*/
int __cvmx_helper_loop_enable(int interface)
{
/* Do nothing. */
return 0;
}
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