path: root/sys/contrib/octeon-sdk/cvmx-helper-util.c

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/**
 * @file
 *
 * Small helper utilities.
 *
 * <hr>$Revision: 70030 $<hr>
 */
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <linux/module.h>
#include <linux/slab.h>					\

#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-pip.h>
#include <asm/octeon/cvmx-ipd.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-gmxx-defs.h>
#include <asm/octeon/cvmx-pko-defs.h>
#include <asm/octeon/cvmx-pko.h>
#include <asm/octeon/cvmx-sli-defs.h>
#include <asm/octeon/cvmx-pexp-defs.h>
#include <asm/octeon/cvmx-helper-cfg.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "executive-config.h"
#include "cvmx-config.h"
#endif
#include "cvmx.h"
#include "cvmx-bootmem.h"
#include "cvmx-fpa.h"
#include "cvmx-pip.h"
#include "cvmx-pko.h"
#include "cvmx-ilk.h"
#include "cvmx-ipd.h"
#include "cvmx-gmx.h"
#include "cvmx-spi.h"
#include "cvmx-sysinfo.h"
#include "cvmx-helper.h"
#include "cvmx-helper-util.h"
#include "cvmx-version.h"
#include "cvmx-helper-ilk.h"
#include "cvmx-helper-cfg.h"
#endif

#ifdef CVMX_ENABLE_HELPER_FUNCTIONS

struct cvmx_iface {
    int				cvif_ipd_nports;
    int				cvif_has_fcs; /* PKO fcs for this interface. */
    enum cvmx_pko_padding	cvif_padding;
    cvmx_helper_link_info_t	*cvif_ipd_port_link_info;
};

/*
 * This has to be static as u-boot expects to probe an interface and
 * gets the number of its ports.
 */
static CVMX_SHARED struct cvmx_iface cvmx_interfaces[CVMX_HELPER_MAX_IFACE];

#ifndef CVMX_BUILD_FOR_LINUX_KERNEL
/**
 * Get the version of the CVMX libraries.
 *
 * @return Version string. Note this buffer is allocated statically
 *         and will be shared by all callers.
 */
const char *cvmx_helper_get_version(void)
{
    return OCTEON_SDK_VERSION_STRING;
}
#endif

/**
 * Convert a interface mode into a human readable string
 *
 * @param mode   Mode to convert
 *
 * @return String
 */
const char *cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t mode)
{
    switch (mode)
    {
        case CVMX_HELPER_INTERFACE_MODE_DISABLED:   return "DISABLED";
        case CVMX_HELPER_INTERFACE_MODE_RGMII:      return "RGMII";
        case CVMX_HELPER_INTERFACE_MODE_GMII:       return "GMII";
        case CVMX_HELPER_INTERFACE_MODE_SPI:        return "SPI";
        case CVMX_HELPER_INTERFACE_MODE_PCIE:       return "PCIE";
        case CVMX_HELPER_INTERFACE_MODE_XAUI:       return "XAUI";
        case CVMX_HELPER_INTERFACE_MODE_RXAUI:      return "RXAUI";
        case CVMX_HELPER_INTERFACE_MODE_SGMII:      return "SGMII";
        case CVMX_HELPER_INTERFACE_MODE_PICMG:      return "PICMG";
        case CVMX_HELPER_INTERFACE_MODE_NPI:        return "NPI";
        case CVMX_HELPER_INTERFACE_MODE_LOOP:       return "LOOP";
        case CVMX_HELPER_INTERFACE_MODE_SRIO:       return "SRIO";
        case CVMX_HELPER_INTERFACE_MODE_ILK:        return "ILK";
    }
    return "UNKNOWN";
}


/**
 * Debug routine to dump the packet structure to the console
 *
 * @param work   Work queue entry containing the packet to dump
 * @return
 */
int cvmx_helper_dump_packet(cvmx_wqe_t *work)
{
    uint64_t        count;
    uint64_t        remaining_bytes;
    cvmx_buf_ptr_t  buffer_ptr;
    uint64_t        start_of_buffer;
    uint8_t *       data_address;
    uint8_t *       end_of_data;

    cvmx_dprintf("Packet Length:   %u\n", cvmx_wqe_get_len(work));
    cvmx_dprintf("    Input Port:  %u\n", cvmx_wqe_get_port(work));
    cvmx_dprintf("    QoS:         %u\n", cvmx_wqe_get_qos(work));
    cvmx_dprintf("    Buffers:     %u\n", work->word2.s.bufs);

    if (work->word2.s.bufs == 0)
    {
        cvmx_ipd_wqe_fpa_queue_t wqe_pool;
        wqe_pool.u64 = cvmx_read_csr(CVMX_IPD_WQE_FPA_QUEUE);
        buffer_ptr.u64 = 0;
        buffer_ptr.s.pool = wqe_pool.s.wqe_pool;
        buffer_ptr.s.size = 128;
        buffer_ptr.s.addr = cvmx_ptr_to_phys(work->packet_data);
        if (cvmx_likely(!work->word2.s.not_IP))
        {
            cvmx_pip_ip_offset_t pip_ip_offset;
            pip_ip_offset.u64 = cvmx_read_csr(CVMX_PIP_IP_OFFSET);
            buffer_ptr.s.addr += (pip_ip_offset.s.offset<<3) - work->word2.s.ip_offset;
            buffer_ptr.s.addr += (work->word2.s.is_v6^1)<<2;
        }
        else
        {
            /* WARNING: This code assume that the packet is not RAW. If it was,
                we would use PIP_GBL_CFG[RAW_SHF] instead of
                PIP_GBL_CFG[NIP_SHF] */
            cvmx_pip_gbl_cfg_t pip_gbl_cfg;
            pip_gbl_cfg.u64 = cvmx_read_csr(CVMX_PIP_GBL_CFG);
            buffer_ptr.s.addr += pip_gbl_cfg.s.nip_shf;
        }
    }
    else
        buffer_ptr = work->packet_ptr;
    remaining_bytes = cvmx_wqe_get_len(work);

    while (remaining_bytes)
    {
        start_of_buffer = ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7;
        cvmx_dprintf("    Buffer Start:%llx\n", (unsigned long long)start_of_buffer);
        cvmx_dprintf("    Buffer I   : %u\n", buffer_ptr.s.i);
        cvmx_dprintf("    Buffer Back: %u\n", buffer_ptr.s.back);
        cvmx_dprintf("    Buffer Pool: %u\n", buffer_ptr.s.pool);
        cvmx_dprintf("    Buffer Data: %llx\n", (unsigned long long)buffer_ptr.s.addr);
        cvmx_dprintf("    Buffer Size: %u\n", buffer_ptr.s.size);

        cvmx_dprintf("\t\t");
        data_address = (uint8_t *)cvmx_phys_to_ptr(buffer_ptr.s.addr);
        end_of_data = data_address + buffer_ptr.s.size;
        count = 0;
        while (data_address < end_of_data)
        {
            if (remaining_bytes == 0)
                break;
            else
                remaining_bytes--;
            cvmx_dprintf("%02x", (unsigned int)*data_address);
            data_address++;
            if (remaining_bytes && (count == 7))
            {
                cvmx_dprintf("\n\t\t");
                count = 0;
            }
            else
                count++;
        }
        cvmx_dprintf("\n");

        if (remaining_bytes)
            buffer_ptr = *(cvmx_buf_ptr_t*)cvmx_phys_to_ptr(buffer_ptr.s.addr - 8);
    }
    return 0;
}


/**
 * Setup Random Early Drop on a specific input queue
 *
 * @param queue  Input queue to setup RED on (0-7)
 * @param pass_thresh
 *               Packets will begin slowly dropping when there are less than
 *               this many packet buffers free in FPA 0.
 * @param drop_thresh
 *               All incomming packets will be dropped when there are less
 *               than this many free packet buffers in FPA 0.
 * @return Zero on success. Negative on failure
 */
int cvmx_helper_setup_red_queue(int queue, int pass_thresh, int drop_thresh)
{
    cvmx_ipd_qosx_red_marks_t red_marks;
    cvmx_ipd_red_quex_param_t red_param;

    /* Set RED to begin dropping packets when there are pass_thresh buffers
        left. It will linearly drop more packets until reaching drop_thresh
        buffers */
    red_marks.u64 = 0;
    red_marks.s.drop = drop_thresh;
    red_marks.s.pass = pass_thresh;
    cvmx_write_csr(CVMX_IPD_QOSX_RED_MARKS(queue), red_marks.u64);

    /* Use the actual queue 0 counter, not the average */
    red_param.u64 = 0;
    red_param.s.prb_con = (255ul<<24) / (red_marks.s.pass - red_marks.s.drop);
    red_param.s.avg_con = 1;
    red_param.s.new_con = 255;
    red_param.s.use_pcnt = 1;
    cvmx_write_csr(CVMX_IPD_RED_QUEX_PARAM(queue), red_param.u64);
    return 0;
}


/**
 * Setup Random Early Drop to automatically begin dropping packets.
 *
 * @param pass_thresh
 *               Packets will begin slowly dropping when there are less than
 *               this many packet buffers free in FPA 0.
 * @param drop_thresh
 *               All incomming packets will be dropped when there are less
 *               than this many free packet buffers in FPA 0.
 * @return Zero on success. Negative on failure
 */
int cvmx_helper_setup_red(int pass_thresh, int drop_thresh)
{
    int queue;
    int interface;
    int port;

    /*
     * Disable backpressure based on queued buffers. It needs SW support
     */
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
    {
	int bpid;
        for (interface = 0; interface < CVMX_HELPER_MAX_GMX; interface++)
	{
	    int num_ports;

	    num_ports = cvmx_helper_ports_on_interface(interface);
	    for (port = 0; port < num_ports; port++) {
		bpid = cvmx_helper_get_bpid(interface, port);
		if (bpid == CVMX_INVALID_BPID)
	            cvmx_dprintf(
		        "setup_red: cvmx_helper_get_bpid(%d, %d) = %d\n",
			interface, port, cvmx_helper_get_bpid(interface, port));
		else
                    cvmx_write_csr(CVMX_IPD_BPIDX_MBUF_TH(bpid), 0);
	    }
	}
    }
    else
    {
        cvmx_ipd_portx_bp_page_cnt_t page_cnt;

        page_cnt.u64 = 0;
        page_cnt.s.bp_enb = 0;
        page_cnt.s.page_cnt = 100;
        for (interface = 0; interface < CVMX_HELPER_MAX_GMX; interface++)
        {
            for (port = cvmx_helper_get_first_ipd_port(interface);
	        port < cvmx_helper_get_last_ipd_port(interface); port++)
                cvmx_write_csr(CVMX_IPD_PORTX_BP_PAGE_CNT(port), page_cnt.u64);
        }
    }

    for (queue = 0; queue < 8; queue++)
        cvmx_helper_setup_red_queue(queue, pass_thresh, drop_thresh);

    /*
     * Shutoff the dropping based on the per port page count. SW isn't
     * decrementing it right now
     */
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
        cvmx_write_csr(CVMX_IPD_ON_BP_DROP_PKTX(0), 0);
    else
        cvmx_write_csr(CVMX_IPD_BP_PRT_RED_END, 0);

#define IPD_RED_AVG_DLY	1000
#define IPD_RED_PRB_DLY	1000
    /*
     * Setting up avg_dly and prb_dly, enable bits
     */
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
    {
	cvmx_ipd_red_delay_t red_delay;
        cvmx_ipd_red_bpid_enablex_t red_bpid_enable;

	red_delay.u64 = 0;
	red_delay.s.avg_dly = IPD_RED_AVG_DLY;
	red_delay.s.prb_dly = IPD_RED_PRB_DLY;
        cvmx_write_csr(CVMX_IPD_RED_DELAY, red_delay.u64);

	/*
	 * Only enable the gmx ports
	 */
	red_bpid_enable.u64 = 0;
        for (interface = 0; interface < CVMX_HELPER_MAX_GMX; interface++)
	{
	    int num_ports = cvmx_helper_ports_on_interface(interface);
	    for (port = 0; port < num_ports; port++)
		red_bpid_enable.u64 |= (((uint64_t) 1) <<
		    cvmx_helper_get_bpid(interface, port));
	}
	cvmx_write_csr(CVMX_IPD_RED_BPID_ENABLEX(0), red_bpid_enable.u64);
    }
    else
    {
        cvmx_ipd_red_port_enable_t red_port_enable;

        red_port_enable.u64 = 0;
        red_port_enable.s.prt_enb = 0xfffffffffull;
        red_port_enable.s.avg_dly = IPD_RED_AVG_DLY;
        red_port_enable.s.prb_dly = IPD_RED_PRB_DLY;
        cvmx_write_csr(CVMX_IPD_RED_PORT_ENABLE, red_port_enable.u64);

        /*
	 * Shutoff the dropping of packets based on RED for SRIO ports
	 */
        if (octeon_has_feature(OCTEON_FEATURE_SRIO))
        {
            cvmx_ipd_red_port_enable2_t red_port_enable2;
            red_port_enable2.u64 = 0;
            red_port_enable2.s.prt_enb = 0xf0;
            cvmx_write_csr(CVMX_IPD_RED_PORT_ENABLE2, red_port_enable2.u64);
        }
    }

    return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_setup_red);
#endif


/**
 * @INTERNAL
 * Setup the common GMX settings that determine the number of
 * ports. These setting apply to almost all configurations of all
 * chips.
 *
 * @param interface Interface to configure
 * @param num_ports Number of ports on the interface
 *
 * @return Zero on success, negative on failure
 */
int __cvmx_helper_setup_gmx(int interface, int num_ports)
{
    cvmx_gmxx_tx_prts_t gmx_tx_prts;
    cvmx_gmxx_rx_prts_t gmx_rx_prts;
    cvmx_pko_reg_gmx_port_mode_t pko_mode;
    cvmx_gmxx_txx_thresh_t gmx_tx_thresh;
    int index;

    /*
     * Tell GMX the number of TX ports on this interface
     */
    gmx_tx_prts.u64 = cvmx_read_csr(CVMX_GMXX_TX_PRTS(interface));
    gmx_tx_prts.s.prts = num_ports;
    cvmx_write_csr(CVMX_GMXX_TX_PRTS(interface), gmx_tx_prts.u64);

    /*
     * Tell GMX the number of RX ports on this interface.  This only applies
     * to GMII and XAUI ports
     */
    if (cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_RGMII
        || cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_SGMII
        || cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_GMII
        || cvmx_helper_interface_get_mode(interface) == CVMX_HELPER_INTERFACE_MODE_XAUI)
    {
        if (num_ports > 4)
        {
            cvmx_dprintf("__cvmx_helper_setup_gmx: Illegal num_ports\n");
            return(-1);
        }

        gmx_rx_prts.u64 = cvmx_read_csr(CVMX_GMXX_RX_PRTS(interface));
        gmx_rx_prts.s.prts = num_ports;
        cvmx_write_csr(CVMX_GMXX_RX_PRTS(interface), gmx_rx_prts.u64);
    }

    /* 
     * Skip setting CVMX_PKO_REG_GMX_PORT_MODE on 30XX, 31XX, 50XX,
     * and 68XX.
     */
    if (!OCTEON_IS_MODEL(OCTEON_CN30XX) && !OCTEON_IS_MODEL(OCTEON_CN31XX) &&
        !OCTEON_IS_MODEL(OCTEON_CN50XX) && !OCTEON_IS_MODEL(OCTEON_CN68XX))
    {
        /* Tell PKO the number of ports on this interface */
        pko_mode.u64 = cvmx_read_csr(CVMX_PKO_REG_GMX_PORT_MODE);
        if (interface == 0)
        {
            if (num_ports == 1)
                pko_mode.s.mode0 = 4;
            else if (num_ports == 2)
                pko_mode.s.mode0 = 3;
            else if (num_ports <= 4)
                pko_mode.s.mode0 = 2;
            else if (num_ports <= 8)
                pko_mode.s.mode0 = 1;
            else
                pko_mode.s.mode0 = 0;
        }
        else
        {
            if (num_ports == 1)
                pko_mode.s.mode1 = 4;
            else if (num_ports == 2)
                pko_mode.s.mode1 = 3;
            else if (num_ports <= 4)
                pko_mode.s.mode1 = 2;
            else if (num_ports <= 8)
                pko_mode.s.mode1 = 1;
            else
                pko_mode.s.mode1 = 0;
        }
        cvmx_write_csr(CVMX_PKO_REG_GMX_PORT_MODE, pko_mode.u64);
    }

    /* 
     * Set GMX to buffer as much data as possible before starting
     * transmit. This reduces the chances that we have a TX under run
     * due to memory contention. Any packet that fits entirely in the
     * GMX FIFO can never have an under run regardless of memory load.
     */
    gmx_tx_thresh.u64 = cvmx_read_csr(CVMX_GMXX_TXX_THRESH(0, interface));
    if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN31XX) ||
        OCTEON_IS_MODEL(OCTEON_CN50XX))
        /* These chips have a fixed max threshold of 0x40 */
        gmx_tx_thresh.s.cnt = 0x40;
    else
    {
        /* ccn - common cnt numberator */
	int ccn = 0x100; 

        /* Choose the max value for the number of ports */
        if (num_ports <= 1)
            gmx_tx_thresh.s.cnt = ccn / 1;
        else if (num_ports == 2)
            gmx_tx_thresh.s.cnt = ccn / 2;
        else
            gmx_tx_thresh.s.cnt = ccn / 4;
    }

    /*
     * SPI and XAUI can have lots of ports but the GMX hardware only ever has
     * a max of 4
     */
    if (num_ports > 4)
        num_ports = 4;
    for (index = 0; index < num_ports; index++)
        cvmx_write_csr(CVMX_GMXX_TXX_THRESH(index, interface),
	    gmx_tx_thresh.u64);

    /*
     * For o68, we need to setup the pipes
     */
    if (OCTEON_IS_MODEL(OCTEON_CN68XX) && interface < CVMX_HELPER_MAX_GMX)
    {
	cvmx_gmxx_txx_pipe_t config;

	for (index = 0; index < num_ports; index++)
	{
	    config.u64 = 0;

	    if (__cvmx_helper_cfg_pko_port_base(interface, index) >= 0)
	    {
	        config.u64 = cvmx_read_csr(
		    CVMX_GMXX_TXX_PIPE(index, interface));
		config.s.nump = __cvmx_helper_cfg_pko_port_num(interface, index);
		config.s.base = __cvmx_helper_cfg_pko_port_base(interface, index);
		cvmx_write_csr(CVMX_GMXX_TXX_PIPE(index, interface),
		    config.u64);
	    }
	}
    }

    return 0;
}

int cvmx_helper_get_pko_port(int interface, int port)
{
    return cvmx_pko_get_base_pko_port(interface, port);
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_pko_port);
#endif

int cvmx_helper_get_ipd_port(int interface, int port)
{
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
    {
        if (interface >= 0 && interface <= 4)
        {
            cvmx_helper_interface_mode_t mode = cvmx_helper_interface_get_mode(interface);
            if (mode == CVMX_HELPER_INTERFACE_MODE_XAUI || mode == CVMX_HELPER_INTERFACE_MODE_RXAUI)
                return 0x840 + (interface * 0x100);
            else
                return 0x800 + (interface * 0x100) + (port * 16);
        }
        else if (interface == 5 || interface == 6)
            return 0x400 + (interface - 5) * 0x100 + port;
        else if (interface == 7)
            return 0x100 + port;
        else if (interface == 8)
            return port;
        else
            return -1;
    }
    switch (interface)
    {
        case 0: return port;
        case 1: return port + 16;
        case 2: return port + 32;
        case 3: return port + 36;
        case 4: return port + 40;
        case 5: return port + 42;
        case 6: return port + 44;
    }
    return -1;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_ipd_port);
#endif

int __cvmx_helper_get_num_ipd_ports(int interface)
{
    struct cvmx_iface *piface;

    if (interface >= cvmx_helper_get_number_of_interfaces())
        return -1;

    piface = &cvmx_interfaces[interface];
    return piface->cvif_ipd_nports;
}

enum cvmx_pko_padding __cvmx_helper_get_pko_padding(int interface)
{
    struct cvmx_iface *piface;

    if (interface >= cvmx_helper_get_number_of_interfaces())
        return CVMX_PKO_PADDING_NONE;

    piface = &cvmx_interfaces[interface];
    return piface->cvif_padding;
}

int __cvmx_helper_init_interface(int interface, int num_ipd_ports, int has_fcs, enum cvmx_pko_padding pad)
{
    struct cvmx_iface *piface;
    int sz;

    if (interface >= cvmx_helper_get_number_of_interfaces())
        return -1;

    piface = &cvmx_interfaces[interface];
    piface->cvif_ipd_nports = num_ipd_ports;
    piface->cvif_padding = pad;

    piface->cvif_has_fcs = has_fcs;

    /*
     * allocate the per-ipd_port link_info structure
     */
    sz = piface->cvif_ipd_nports * sizeof(cvmx_helper_link_info_t);
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
    if (sz == 0)
	    sz = sizeof(cvmx_helper_link_info_t);
    piface->cvif_ipd_port_link_info = (cvmx_helper_link_info_t *)kmalloc(sz, GFP_KERNEL);
    if (ZERO_OR_NULL_PTR(piface->cvif_ipd_port_link_info))
	    panic("Cannot allocate memory in __cvmx_helper_init_interface.");
#else
    piface->cvif_ipd_port_link_info = (cvmx_helper_link_info_t *)cvmx_bootmem_alloc(sz, sizeof(cvmx_helper_link_info_t));
#endif
    if (!piface->cvif_ipd_port_link_info)
        return -1;

    /* Initialize 'em */ {
	int i;
	cvmx_helper_link_info_t *p;
	p = piface->cvif_ipd_port_link_info;

	for (i = 0; i < piface->cvif_ipd_nports; i++)
	{
	    (*p).u64 = 0;
	    p++;
	}
    }

    return 0;
}

/*
 * Shut down the interfaces; free the resources.
 * @INTERNAL
 */
void __cvmx_helper_shutdown_interfaces(void)
{
    int i;
    int nifaces;	/* number of interfaces */
    struct cvmx_iface *piface;

    nifaces = cvmx_helper_get_number_of_interfaces();
    for (i = 0; i < nifaces; i++)
    {
        piface = cvmx_interfaces + i;
        if (piface->cvif_ipd_port_link_info)
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
            kfree(piface->cvif_ipd_port_link_info);
#else
            /*
	     * For SE apps, bootmem was meant to be allocated and never
	     * freed.
	     */
#endif
        piface->cvif_ipd_port_link_info = 0;
    }
}

int __cvmx_helper_set_link_info(int interface, int port,
    cvmx_helper_link_info_t link_info)
{
    struct cvmx_iface *piface;

    if (interface >= cvmx_helper_get_number_of_interfaces())
        return -1;

    piface = &cvmx_interfaces[interface];

    if (piface->cvif_ipd_port_link_info)
    {
        piface->cvif_ipd_port_link_info[port] = link_info;
        return 0;
    }

    return -1;
}

cvmx_helper_link_info_t __cvmx_helper_get_link_info(int interface, int port)
{
    struct cvmx_iface *piface;
    cvmx_helper_link_info_t err;

    err.u64 = 0;

    if (interface >= cvmx_helper_get_number_of_interfaces())
        return err;
    piface = &cvmx_interfaces[interface];

    if (piface->cvif_ipd_port_link_info)
        return piface->cvif_ipd_port_link_info[port];

    return err;
}

int __cvmx_helper_get_has_fcs(int interface)
{
    return cvmx_interfaces[interface].cvif_has_fcs;
}

int cvmx_helper_get_pknd(int interface, int port)
{
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
        return __cvmx_helper_cfg_pknd(interface, port);

    return CVMX_INVALID_PKND;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_pknd);
#endif

int cvmx_helper_get_bpid(int interface, int port)
{
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
        return __cvmx_helper_cfg_bpid(interface, port);

    return CVMX_INVALID_BPID;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_bpid);
#endif

/**
 * Display interface statistics.
 *
 * @param port IPD/PKO port number
 *
 * @return none
 */
void cvmx_helper_show_stats(int port)
{
    cvmx_pip_port_status_t status;
    cvmx_pko_port_status_t pko_status;

    /* ILK stats */
    if (octeon_has_feature(OCTEON_FEATURE_ILK))
        __cvmx_helper_ilk_show_stats();

    /* PIP stats */
    cvmx_pip_get_port_status (port, 0, &status);
    cvmx_dprintf ("port %d: the number of packets - ipd: %d\n", port, (int)status.packets);

    /* PKO stats */
    cvmx_pko_get_port_status (port, 0, &pko_status);
    cvmx_dprintf ("port %d: the number of packets - pko: %d\n", port, (int)pko_status.packets);

    /* TODO: other stats */
}
#endif /* CVMX_ENABLE_HELPER_FUNCTIONS */

/**
 * Returns the interface number for an IPD/PKO port number.
 *
 * @param ipd_port IPD/PKO port number
 *
 * @return Interface number
 */
int cvmx_helper_get_interface_num(int ipd_port)
{
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
    {
        if (ipd_port >= 0x800 && ipd_port < 0x900)
            return 0;
        else if (ipd_port >= 0x900 && ipd_port < 0xa00)
            return 1;
        else if (ipd_port >= 0xa00 && ipd_port < 0xb00)
            return 2;
        else if (ipd_port >= 0xb00 && ipd_port < 0xc00)
            return 3;
        else if (ipd_port >= 0xc00 && ipd_port < 0xd00)
            return 4;
        else if (ipd_port >= 0x400 && ipd_port < 0x500)
            return 5;
        else if (ipd_port >= 0x500 && ipd_port < 0x600)
            return 6;
        else if (ipd_port >= 0x100 && ipd_port < 0x120)
            return 7;
        else if (ipd_port < 8)
            return 8;
    } else {
	if (ipd_port < 16)
	    return 0;
	else if (ipd_port < 32)
	    return 1;
	else if (ipd_port < 36)
	    return 2;
	else if (ipd_port < 40)
	    return 3;
	else if (ipd_port < 42)
	    return 4;
	else if (ipd_port < 44)
	    return 5;
	else if (ipd_port < 46)
	    return 6;
    }
    cvmx_dprintf("cvmx_helper_get_interface_num: Illegal IPD port number %d\n", ipd_port);
    return -1;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_interface_num);
#endif


/**
 * Returns the interface index number for an IPD/PKO port
 * number.
 *
 * @param ipd_port IPD/PKO port number
 *
 * @return Interface index number
 */
int cvmx_helper_get_interface_index_num(int ipd_port)
{
    if (octeon_has_feature(OCTEON_FEATURE_PKND))
    {
        if (ipd_port >= 0x800 && ipd_port < 0xd00)
        {
            int port = ((ipd_port & 0xff) >> 6);
            return ((port) ? (port - 1) : ((ipd_port & 0xff) >> 4));
        }
        else if (ipd_port >= 0x400 && ipd_port < 0x600)
            return (ipd_port & 0xff);
        else if (ipd_port >= 0x100 && ipd_port < 0x120)
            return (ipd_port & 0xff);
        else if (ipd_port < 8)
            return ipd_port;
        else
            cvmx_dprintf("cvmx_helper_get_interface_index_num: Illegal IPD port number %d\n", ipd_port);
        return -1;
    }
    if (ipd_port < 32)
        return ipd_port & 15;
    else if (ipd_port < 40)
        return ipd_port & 3;
    else if (ipd_port < 44)
        return ipd_port & 1;
    else if (ipd_port < 46)
        return ipd_port & 1;
    else
        cvmx_dprintf("cvmx_helper_get_interface_index_num: Illegal IPD port number\n");

    return -1;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_helper_get_interface_index_num);
#endif