| /***********************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; | |
| } |