cavium-octeon/executive/cvmx-helper-npi.c

0001 /***********************license start***************
0002  * Author: Cavium Networks
0003  *
0004  * Contact: support@caviumnetworks.com
0005  * This file is part of the OCTEON SDK
0006  *
0007  * Copyright (c) 2003-2008 Cavium Networks
0008  *
0009  * This file is free software; you can redistribute it and/or modify
0010  * it under the terms of the GNU General Public License, Version 2, as
0011  * published by the Free Software Foundation.
0012  *
0013  * This file is distributed in the hope that it will be useful, but
0014  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
0015  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
0016  * NONINFRINGEMENT.  See the GNU General Public License for more
0017  * details.
0018  *
0019  * You should have received a copy of the GNU General Public License
0020  * along with this file; if not, write to the Free Software
0021  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0022  * or visit http://www.gnu.org/licenses/.
0023  *
0024  * This file may also be available under a different license from Cavium.
0025  * Contact Cavium Networks for more information
0026  ***********************license end**************************************/
0027
0028 /*
0029  * Functions for NPI initialization, configuration,
0030  * and monitoring.
0031  */
0032 #include <asm/octeon/octeon.h>
0033
0034 #include <asm/octeon/cvmx-config.h>
0035
0036 #include <asm/octeon/cvmx-helper.h>
0037
0038 #include <asm/octeon/cvmx-pip-defs.h>
0039
0040 /**
0041  * Probe a NPI interface and determine the number of ports
0042  * connected to it. The NPI interface should still be down
0043  * after this call.
0044  *
0045  * @interface: Interface to probe
0046  *
0047  * Returns Number of ports on the interface. Zero to disable.
0048  */
0049 int __cvmx_helper_npi_probe(int interface)
0050 {
0051 #if CVMX_PKO_QUEUES_PER_PORT_PCI > 0
0052     if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
0053         return 4;
0054     else if (OCTEON_IS_MODEL(OCTEON_CN56XX)
0055          && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X))
0056         /* The packet engines didn't exist before pass 2 */
0057         return 4;
0058     else if (OCTEON_IS_MODEL(OCTEON_CN52XX)
0059          && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X))
0060         /* The packet engines didn't exist before pass 2 */
0061         return 4;
0062 #endif
0063     return 0;
0064 }
0065
0066 /**
0067  * Bringup and enable a NPI interface. After this call packet
0068  * I/O should be fully functional. This is called with IPD
0069  * enabled but PKO disabled.
0070  *
0071  * @interface: Interface to bring up
0072  *
0073  * Returns Zero on success, negative on failure
0074  */
0075 int __cvmx_helper_npi_enable(int interface)
0076 {
0077     /*
0078      * On CN50XX, CN52XX, and CN56XX we need to disable length
0079      * checking so packet < 64 bytes and jumbo frames don't get
0080      * errors.
0081      */
0082     if (!OCTEON_IS_MODEL(OCTEON_CN3XXX) &&
0083         !OCTEON_IS_MODEL(OCTEON_CN58XX)) {
0084         int num_ports = cvmx_helper_ports_on_interface(interface);
0085         int port;
0086         for (port = 0; port < num_ports; port++) {
0087             union cvmx_pip_prt_cfgx port_cfg;
0088             int ipd_port =
0089                 cvmx_helper_get_ipd_port(interface, port);
0090             port_cfg.u64 =
0091                 cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
0092             port_cfg.s.maxerr_en = 0;
0093             port_cfg.s.minerr_en = 0;
0094             cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port),
0095                        port_cfg.u64);
0096         }
0097     }
0098
0099     /* Enables are controlled by the remote host, so nothing to do here */
0100     return 0;
0101 }