/***********************license start***************
 *  Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights
 *  reserved.
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 *
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 *  modification, are permitted provided that the following conditions are
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 *
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 *        notice, this list of conditions and the following disclaimer.
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 *        derived from this software without specific prior written
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 *
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 ***********************license end**************************************/






/**
 * @file
 *
 * Functions for NPI initialization, configuration,
 * and monitoring.
 *
 * <hr>$Revision: 41586 $<hr>
 */
#include "cvmx.h"
#include "cvmx-helper.h"

#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
 * @INTERNAL
 * Probe a NPI interface and determine the number of ports
 * connected to it. The NPI interface should still be down
 * after this call.
 *
 * @param interface Interface to probe
 *
 * @return Number of ports on the interface. Zero to disable.
 */
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))
        return 4; /* The packet engines didn't exist before pass 2 */
    else if (OCTEON_IS_MODEL(OCTEON_CN52XX) && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X))
        return 4; /* The packet engines didn't exist before pass 2 */
#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;
}


/**
 * @INTERNAL
 * Bringup and enable a NPI interface. After this call packet
 * I/O should be fully functional. This is called with IPD
 * enabled but PKO disabled.
 *
 * @param interface Interface to bring up
 *
 * @return Zero on success, negative on failure
 */
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++)
        {
            cvmx_pip_port_cfg_t 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;
}

#endif /* CVMX_ENABLE_PKO_FUNCTIONS */