cvmx-helper-npi.c

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/***********************license start***************
 * Author: Cavium Networks
 *
 * Contact: [email protected]
 * 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 NPI 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>

int __cvmx_helper_npi_probe(int interface)
{
#if CVMX_PKO_QUEUES_PER_PORT_PCI > 0
    if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
        return 4;
    else if (OCTEON_IS_MODEL(OCTEON_CN56XX)
         && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X))
        /* The packet engines didn't exist before pass 2 */
        return 4;
    else if (OCTEON_IS_MODEL(OCTEON_CN52XX)
         && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X))
        /* The packet engines didn't exist before pass 2 */
        return 4;
#if 0
    /*
     * Technically CN30XX, CN31XX, and CN50XX contain packet
     * engines, but nobody ever uses them. Since this is the case,
     * we disable them here.
     */
    else if (OCTEON_IS_MODEL(OCTEON_CN31XX)
         || OCTEON_IS_MODEL(OCTEON_CN50XX))
        return 2;
    else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
        return 1;
#endif
#endif
    return 0;
}

int __cvmx_helper_npi_enable(int interface)
{
    /*
     * On CN50XX, CN52XX, and CN56XX we need to disable length
     * checking so packet < 64 bytes and jumbo frames don't get
     * errors.
     */
    if (!OCTEON_IS_MODEL(OCTEON_CN3XXX) &&
        !OCTEON_IS_MODEL(OCTEON_CN58XX)) {
        int num_ports = cvmx_helper_ports_on_interface(interface);
        int port;
        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);
        }
    }

    /* Enables are controlled by the remote host, so nothing to do here */
    return 0;
}