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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 <asm/octeon/cvmx-config.h> #include <asm/octeon/cvmx-helper.h> #include <asm/octeon/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; } |