xref: /freebsd-10-stable/sys/contrib/octeon-sdk/cvmx-helper-loop.c

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/**
 * @file
 *
 * Functions for LOOP initialization, configuration,
 * and monitoring.
 *
 * <hr>$Revision: 70030 $<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


int __cvmx_helper_loop_enumerate(int interface)
{
	return (OCTEON_IS_MODEL(OCTEON_CN68XX) ? 8 : 4);
}

/**
 * @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)
{
	return __cvmx_helper_loop_enumerate(interface);
}


/**
 * @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)
{
    cvmx_pip_prt_cfgx_t port_cfg;
    int num_ports, index;
    unsigned long offset;

    num_ports = __cvmx_helper_get_num_ipd_ports(interface);

    /*
     * We need to disable length checking so packet < 64 bytes and jumbo
     * frames don't get errors
     */
    for (index = 0; index < num_ports; index++) {
        offset = ((octeon_has_feature(OCTEON_FEATURE_PKND)) ?
	    cvmx_helper_get_pknd(interface, index) :
            cvmx_helper_get_ipd_port(interface, index));

        port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(offset));
        port_cfg.s.maxerr_en = 0;
        port_cfg.s.minerr_en = 0;
        cvmx_write_csr(CVMX_PIP_PRT_CFGX(offset), port_cfg.u64);
    }

    /*
     * Disable FCS stripping for loopback ports
     */
    if (!octeon_has_feature(OCTEON_FEATURE_PKND)) {
        cvmx_ipd_sub_port_fcs_t ipd_sub_port_fcs;
        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 0;
}

#endif /* CVMX_ENABLE_PKO_FUNCTIONS */