/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "nge.h"

#undef  NGE_DBG
#define NGE_DBG         NGE_DBG_NDD

static char transfer_speed_propname[] = "transfer-speed";
static char speed_propname[] = "speed";
static char duplex_propname[] = "full-duplex";

/*
 * synchronize the  adv* and en* parameters.
 *
 * See comments in <sys/dld.h> for details of the *_en_*
 * parameters.  The usage of ndd for setting adv parameters will
 * synchronize all the en parameters with the nge parameters,
 * implicitly disabling any settings made via dladm.
 */
static void
nge_param_sync(nge_t *ngep)
{
        ngep->param_en_pause = ngep->param_adv_pause;
        ngep->param_en_asym_pause = ngep->param_adv_asym_pause;
        ngep->param_en_1000fdx = ngep->param_adv_1000fdx;
        ngep->param_en_1000hdx = ngep->param_adv_1000hdx;
        ngep->param_en_100fdx = ngep->param_adv_100fdx;
        ngep->param_en_100hdx = ngep->param_adv_100hdx;
        ngep->param_en_10fdx = ngep->param_adv_10fdx;
        ngep->param_en_10hdx = ngep->param_adv_10hdx;
}


boolean_t
nge_nd_get_prop_val(dev_info_t *dip, char *nm, long min, long max, int *pval)
{
        /*
         * If the parameter is writable, and there's a property
         * with the same name, and its value is in range, we use
         * it to initialise the parameter.  If it exists but is
         * out of range, it's ignored.
         */
        if (NGE_PROP_EXISTS(dip, nm)) {
                *pval = NGE_PROP_GET_INT(dip, nm);
                if (*pval >= min && *pval <= max)
                        return (B_TRUE);
        }
        return (B_FALSE);
}

#define NGE_INIT_PROP(propname, fieldname, initval) {           \
        if (nge_nd_get_prop_val(dip, propname, 0, 1, &propval)) \
                ngep->fieldname = propval;                      \
        else                                                    \
                ngep->fieldname = initval;                      \
}

static void
nge_nd_param_init(nge_t *ngep)
{
        dev_info_t *dip;
        int propval;

        dip = ngep->devinfo;

        /*
         * initialize values to those from driver.conf (if available)
         * or the default value otherwise.
         */
        NGE_INIT_PROP("adv_autoneg_cap", param_adv_autoneg, 1);
        NGE_INIT_PROP("adv_1000fdx_cap", param_adv_1000fdx, 1);
        NGE_INIT_PROP("adv_1000hdx_cap", param_adv_1000hdx, 0);
        NGE_INIT_PROP("adv_pause_cap", param_adv_pause, 1);
        NGE_INIT_PROP("adv_asym_pause_cap", param_adv_asym_pause, 1);
        NGE_INIT_PROP("adv_100fdx_cap", param_adv_100fdx, 1);
        NGE_INIT_PROP("adv_100hdx_cap", param_adv_100hdx, 1);
        NGE_INIT_PROP("adv_10fdx_cap", param_adv_10fdx, 1);
        NGE_INIT_PROP("adv_10hdx_cap", param_adv_10hdx, 1);
}

int
nge_nd_init(nge_t *ngep)
{
        dev_info_t *dip;
        int duplex;
        int speed;

        NGE_TRACE(("nge_nd_init($%p)", (void *)ngep));

        /*
         * initialize from .conf file, if appropriate.
         */
        nge_nd_param_init(ngep);

        /*
         * The link speed may be forced to 10, 100 or 1000 Mbps using
         * the property "transfer-speed". This may be done in OBP by
         * using the command "apply transfer-speed=<speed> <device>".
         * The speed may be 10, 100 or 1000 - any other value will be
         * ignored.  Note that this does *enables* autonegotiation, but
         * restricts it to the speed specified by the property.
         */
        dip = ngep->devinfo;
        if (NGE_PROP_EXISTS(dip, transfer_speed_propname)) {

                speed = NGE_PROP_GET_INT(dip, transfer_speed_propname);
                nge_log(ngep, "%s property is %d",
                    transfer_speed_propname, speed);

                switch (speed) {
                case 1000:
                        ngep->param_adv_autoneg = 1;
                        ngep->param_adv_1000fdx = 1;
                        ngep->param_adv_1000hdx = 0;
                        ngep->param_adv_100fdx = 0;
                        ngep->param_adv_100hdx = 0;
                        ngep->param_adv_10fdx = 0;
                        ngep->param_adv_10hdx = 0;
                        break;

                case 100:
                        ngep->param_adv_autoneg = 1;
                        ngep->param_adv_1000fdx = 0;
                        ngep->param_adv_1000hdx = 0;
                        ngep->param_adv_100fdx = 1;
                        ngep->param_adv_100hdx = 1;
                        ngep->param_adv_10fdx = 0;
                        ngep->param_adv_10hdx = 0;
                        break;

                case 10:
                        ngep->param_adv_autoneg = 1;
                        ngep->param_adv_1000fdx = 0;
                        ngep->param_adv_1000hdx = 0;
                        ngep->param_adv_100fdx = 0;
                        ngep->param_adv_100hdx = 0;
                        ngep->param_adv_10fdx = 1;
                        ngep->param_adv_10hdx = 1;
                        break;

                default:
                        break;
                }
        }

        /*
         * Also check the "speed" and "full-duplex" properties.  Setting
         * these properties will override all other settings and *disable*
         * autonegotiation, so both should be specified if either one is.
         * Otherwise, the unspecified parameter will be set to a default
         * value (1000Mb/s, full-duplex).
         */
        if (NGE_PROP_EXISTS(dip, speed_propname) ||
            NGE_PROP_EXISTS(dip, duplex_propname)) {

                ngep->param_adv_autoneg = 0;
                ngep->param_adv_1000fdx = 1;
                ngep->param_adv_1000hdx = 0;
                ngep->param_adv_100fdx = 1;
                ngep->param_adv_100hdx = 1;
                ngep->param_adv_10fdx = 1;
                ngep->param_adv_10hdx = 1;

                speed = NGE_PROP_GET_INT(dip, speed_propname);
                duplex = NGE_PROP_GET_INT(dip, duplex_propname);
                nge_log(ngep, "%s property is %d",
                    speed_propname, speed);
                nge_log(ngep, "%s property is %d",
                    duplex_propname, duplex);

                switch (speed) {
                case 1000:
                default:
                        ngep->param_adv_100fdx = 0;
                        ngep->param_adv_100hdx = 0;
                        ngep->param_adv_10fdx = 0;
                        ngep->param_adv_10hdx = 0;
                        break;

                case 100:
                        ngep->param_adv_1000fdx = 0;
                        ngep->param_adv_1000hdx = 0;
                        ngep->param_adv_10fdx = 0;
                        ngep->param_adv_10hdx = 0;
                        break;

                case 10:
                        ngep->param_adv_1000fdx = 0;
                        ngep->param_adv_1000hdx = 0;
                        ngep->param_adv_100fdx = 0;
                        ngep->param_adv_100hdx = 0;
                        break;
                }

                switch (duplex) {
                default:
                case 1:
                        ngep->param_adv_1000hdx = 0;
                        ngep->param_adv_100hdx = 0;
                        ngep->param_adv_10hdx = 0;
                        break;

                case 0:
                        ngep->param_adv_1000fdx = 0;
                        ngep->param_adv_100fdx = 0;
                        ngep->param_adv_10fdx = 0;
                        break;
                }
        }


        nge_param_sync(ngep);

        return (0);
}