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