sun4v/io/mach_rootnex.c

	mach_rootnex.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * sun4v root nexus driver
 */
#include <sys/conf.h>
#include <sys/cpuvar.h>
#include <sys/ivintr.h>
#include <sys/intreg.h>
#include <sys/ddi_subrdefs.h>
#include <sys/sunndi.h>
#include <sys/async.h>

/* Useful debugging Stuff */
#include <sys/nexusdebug.h>
#define ROOTNEX_MAP_DEBUG       0x1
#define ROOTNEX_INTR_DEBUG      0x2

extern uint_t   root_phys_addr_lo_mask;
extern int rootnex_name_child(dev_info_t *child, char *name, int namelen);
extern int rootnex_ctl_uninitchild(dev_info_t *dip);

uint_t  root_phys_addr_hi_mask = 0xfffffff;

#define BUS_ADDRTYPE_CONFIG     0xc

#define BUSTYPE_TO_ADDRTYPE(bustype)    ((bustype >> 28) & 0xf)

static char *bus_addrtype[16] = {
    "m", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
    "i", NULL, NULL, NULL, "", NULL, NULL, NULL
};

/*
 * config information
 */
int
rootnex_add_intr_impl(dev_info_t *dip, dev_info_t *rdip,
    ddi_intr_handle_impl_t *hdlp);

int
rootnex_remove_intr_impl(dev_info_t *dip, dev_info_t *rdip,
    ddi_intr_handle_impl_t *hdlp);

void
rootnex_get_intr_pri(dev_info_t *dip, dev_info_t *rdip,
    ddi_intr_handle_impl_t *hdlp);

ddi_iblock_cookie_t rootnex_err_ibc;

/*
 * rootnex_add_intr_impl:
 */
/*ARGSUSED*/
int
rootnex_add_intr_impl(dev_info_t *dip, dev_info_t *rdip,
    ddi_intr_handle_impl_t *hdlp)
{
    ddi_ispec_t *ip = (ddi_ispec_t *)hdlp->ih_private;

    hdlp->ih_vector = *ip->is_intr;

    return (i_ddi_add_ivintr(hdlp));
}

/*
 * rootnex_remove_intr_impl:
 */
/*ARGSUSED*/
int
rootnex_remove_intr_impl(dev_info_t *dip, dev_info_t *rdip,
    ddi_intr_handle_impl_t *hdlp)
{
    ddi_ispec_t *ip = (ddi_ispec_t *)hdlp->ih_private;

    hdlp->ih_vector = *ip->is_intr;
    i_ddi_rem_ivintr(hdlp);

    return (DDI_SUCCESS);
}

/*
 * rootnex_get_intr_pri:
 */
/*ARGSUSED*/
void
rootnex_get_intr_pri(dev_info_t *dip, dev_info_t *rdip,
    ddi_intr_handle_impl_t *hdlp)
{
}

int
rootnex_ctl_reportdev_impl(dev_info_t *dev)
{
    struct regspec *rp;
    char buf[80];
    char *p = buf;

    (void) sprintf(p, "%s%d at root", ddi_driver_name(dev),
        ddi_get_instance(dev));
    p += strlen(p);

    if (sparc_pd_getnreg(dev) > 0) {
        rp = sparc_pd_getreg(dev, 0);

        (void) strcpy(p, ": ");
        p += strlen(p);

        (void) snprintf(p, sizeof (buf) - (buf - p),
            "0x%x 0x%x", rp->regspec_bustype & root_phys_addr_hi_mask,
            rp->regspec_addr & root_phys_addr_lo_mask);

        p += strlen(p);
    }

    /*
     * This is where we need to print out the interrupt specifications
     * for the FFB device and any UPA add-on devices.  Not sure how to
     * do this yet?
     */
    cmn_err(CE_CONT, "?%s\n", buf);
    return (DDI_SUCCESS);
}

int
rootnex_name_child_impl(dev_info_t *child, char *name, int namelen)
{
    struct ddi_parent_private_data *pdptr;
    uint_t addrtype;
    uint_t addrlow;
    struct regspec *rp;

    extern uint_t root_phys_addr_lo_mask;
    extern void make_ddi_ppd(
        dev_info_t *, struct ddi_parent_private_data **);

    /*
     * Fill in parent-private data and this function returns to us
     * an indication if it used "registers" to fill in the data.
     */
    if (ddi_get_parent_data(child) == NULL) {
        make_ddi_ppd(child, &pdptr);
        ddi_set_parent_data(child, pdptr);
    }

    /*
     * No reg property, return null string as address (e.g. pseudo)
     */
    name[0] = '\0';
    if (sparc_pd_getnreg(child) == 0) {
        return (DDI_SUCCESS);
    }
    rp = sparc_pd_getreg(child, 0);
    ASSERT(rp != NULL);

    /*
     * Name node on behalf of child nexus.
     */
    if (ddi_get_parent(child) != ddi_root_node()) {
        (void) snprintf(name, namelen, "%x,%x",
            rp->regspec_bustype, rp->regspec_addr);
        return (DDI_SUCCESS);
    }

    /*
     * On sun4v, the 'name' of a root node device depends upon
     * the first reg property, which contains two 32-bit address
     * cells as follows:
     *
     *  bit# 63-32: ssss.hhhh.hhhh.hhhh.hhhh.hhhh.hhhh.hhhh
     *  bit# 31-00: llll.llll.llll.llll.llll.llll.llll.llll
     *
     * where 'ssss' defines the address type and naming convention
     * as follows:
     *
     *    0000  -> cacheable address space
     *      foo@m<high-addr>[,<low-addr>]
     *    1000  -> non-cacheable IO address space
     *      foo@i<high-addr>[,<low-addr>]
     *    1100  -> non-cacheable configuration address space
     *      foo@<high-addr>
     *
     * where <hish-addr> is hex-ASCII reprensation of the hh...hh
     * bits and <low-addr> is hex-ASCII represenation of the
     * ll...ll bits.
     *
     * Note that the leading zeros are omitted here. Also, if the
     * <low-addr> bits are zero, then the trailing component is
     * omitted as well.
     */
    addrtype = BUSTYPE_TO_ADDRTYPE(rp->regspec_bustype);
    addrlow = rp->regspec_addr & root_phys_addr_lo_mask;
    if (bus_addrtype[addrtype] == NULL)
        cmn_err(CE_PANIC, "rootnex: wrong bustype: %x child: %s\n",
            rp->regspec_bustype, ddi_node_name(child));
    else if (addrtype == BUS_ADDRTYPE_CONFIG || addrlow == 0)
        (void) snprintf(name, namelen, "%s%x",
            bus_addrtype[addrtype],
            rp->regspec_bustype & root_phys_addr_hi_mask);
    else
        (void) snprintf(name, namelen, "%s%x,%x",
            bus_addrtype[addrtype],
            rp->regspec_bustype & root_phys_addr_hi_mask, addrlow);

    return (DDI_SUCCESS);
}


int
rootnex_ctl_initchild_impl(dev_info_t *dip)
{
    struct ddi_parent_private_data *pd;
    char name[MAXNAMELEN];

    extern struct ddi_parent_private_data *init_regspec_64(dev_info_t *dip);

    /* Name the child */
    (void) rootnex_name_child(dip, name, MAXNAMELEN);
    ddi_set_name_addr(dip, name);

    /*
     * Try to merge .conf node. If merge is successful, return
     * DDI_FAILURE to allow caller to remove this node.
     */
    if (ndi_dev_is_persistent_node(dip) == 0 &&
        (ndi_merge_node(dip, rootnex_name_child) == DDI_SUCCESS)) {
        (void) rootnex_ctl_uninitchild(dip);
        return (DDI_FAILURE);
    }

    /*
     * If there are no "reg"s in the child node, return.
     */
    pd = init_regspec_64(dip);
    if ((pd == NULL) || (pd->par_nreg == 0))
        return (DDI_SUCCESS);

    return (DDI_SUCCESS);
}

/*ARGSUSED*/
void
rootnex_ctl_uninitchild_impl(dev_info_t *dip)
{
}