xref: /freebsd-9.3-release/sys/contrib/octeon-sdk/cvmx-helper-loop.c

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/**
 * @file
 *
 * Functions for LOOP initialization, configuration,
 * and monitoring.
 *
 * <hr>$Revision: 49448 $<hr>
 */
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
#include <asm/octeon/cvmx-helper.h>
#endif
#include <asm/octeon/cvmx-pip-defs.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "executive-config.h"
#include "cvmx-config.h"
#ifdef CVMX_ENABLE_PKO_FUNCTIONS

#include "cvmx.h"
#include "cvmx-helper.h"
#endif
#else
#include "cvmx.h"
#include "cvmx-helper.h"
#endif
#endif
#ifdef CVMX_ENABLE_PKO_FUNCTIONS

/**
 * @INTERNAL
 * Probe a LOOP interface and determine the number of ports
 * connected to it. The LOOP 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_loop_probe(int interface)
{
    cvmx_ipd_sub_port_fcs_t 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++)
    {
        cvmx_pip_prt_cfgx_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);
    }

    /* 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;
}


/**
 * @INTERNAL
 * 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.
 *
 * @param interface Interface to bring up
 *
 * @return Zero on success, negative on failure
 */
int __cvmx_helper_loop_enable(int interface)
{
    /* Do nothing. */
    return 0;
}

#endif /* CVMX_ENABLE_PKO_FUNCTIONS */