/*      $OpenBSD: autoconf.c,v 1.47 2022/09/02 20:06:56 miod Exp $      */
/*
 * Copyright (c) 1996, 1997 Per Fogelstrom
 * Copyright (c) 1995 Theo de Raadt
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department and Ralph Campbell.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * from: Utah Hdr: autoconf.c 1.31 91/01/21
 *
 *      from: @(#)autoconf.c    8.1 (Berkeley) 6/10/93
 *      $Id: autoconf.c,v 1.47 2022/09/02 20:06:56 miod Exp $
 */

/*
 * Setup the system to run on the current machine.
 *
 * cpu_configure() is called at boot time.  Available
 * devices are determined (from possibilities mentioned in ioconf.c),
 * and the drivers are initialized.
 */

#include "sd.h"
#include "mpath.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/disklabel.h>
#include <sys/conf.h>
#include <sys/reboot.h>
#include <sys/device.h>
#include <dev/cons.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>

#include <sys/disk.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <dev/ata/atavar.h>

#if NMPATH > 0
#include <scsi/mpathvar.h>
#endif

void    dumpconf(void);
static  struct devmap *findtype(char **);
void    parseofwbp(char *);
int     getpno(char **);

/*
 * The following several variables are related to
 * the configuration process, and are used in initializing
 * the machine.
 */
int     cold = 1;       /* if 1, still working on cold-start */
char    bootdev[16];    /* to hold boot dev name */
struct device *bootdv = NULL;
enum devclass bootdev_class = DV_DULL;
int     bootdev_type = 0;
int     bootdev_unit = 0;

/*
 *  Configure all devices found that we know about.
 *  This is done at boot time.
 */
void
cpu_configure(void)
{
        (void)splhigh();        /* To be really sure.. */

        softintr_init();

        if (config_rootfound("mainbus", "mainbus") == 0)
                panic("no mainbus found");
        (void)spl0();
        cold = 0;
}

struct devmap {
        char *att;
        char *dev;
        int   type;
};
#define T_IFACE 0x10

#define T_BUS   0x00
#define T_SCSI  0x11
#define T_IDE   0x12
#define T_DISK  0x21

static struct devmap *
findtype(char **s)
{
        static struct devmap devmap[] = {
                { "/ht",                NULL, T_BUS },
                { "/ht@",               NULL, T_BUS },
                { "/pci@",              NULL, T_BUS },
                { "/pci",               NULL, T_BUS },
                { "/AppleKiwi@",        NULL, T_BUS },
                { "/AppleKiwi",         NULL, T_BUS },
                { "/mac-io@",           NULL, T_BUS },
                { "/mac-io",            NULL, T_BUS },
                { "/@",                 NULL, T_BUS },
                { "/LSILogic,sas@",     "sd", T_SCSI },
                { "/scsi@",             "sd", T_SCSI },
                { "/ide",               "wd", T_IDE },
                { "/ata",               "wd", T_IDE },
                { "/k2-sata-root",      NULL, T_BUS },
                { "/k2-sata",           "wd", T_IDE },
                { "/disk@",             "sd", T_DISK },
                { "/disk",              "wd", T_DISK },
                { "/usb@",              "sd", T_SCSI },
                { "/ADPT,2940U2B@",     "sd", T_SCSI },
                { "/bcom5704@4",        "bge0", T_IFACE },
                { "/bcom5704@4,1",      "bge1", T_IFACE },
                { "/ethernet",          "gem0", T_IFACE },
                { "/enet",              "mc0", T_IFACE },
                { NULL, NULL }
        };
        struct devmap *dp = &devmap[0];

        while (dp->att) {
                if (strncmp(*s, dp->att, strlen(dp->att)) == 0) {
                        *s += strlen(dp->att);
                        break;
                }
                dp++;
        }
        if (dp->att == NULL)
                printf("string [%s] not found\n", *s);

        return(dp);
}

/*
 * Look at the string 'bp' and decode the boot device.
 * Boot names look like: '/pci/scsi@c/disk@0,0/bsd'
 *                       '/pci/mac-io/ide@20000/disk@0,0/bsd
 *                       '/pci/mac-io/ide/disk/bsd
 *                       '/ht@0,f2000000/pci@2/bcom5704@4/bsd'
 */
void
parseofwbp(char *bp)
{
        int     ptype;
        char   *dev, *cp;
        struct devmap *dp;

        cp = bp;
        do {
                while(*cp && *cp != '/')
                        cp++;

                dp = findtype(&cp);
                if (!dp->att) {
                        printf("Warning: bootpath unrecognized: %s\n", bp);
                        return;
                }
        } while((dp->type & T_IFACE) == 0);

        if (dp->att && dp->type == T_IFACE) {
                bootdev_class = DV_IFNET;
                bootdev_type = dp->type;
                strlcpy(bootdev, dp->dev, sizeof bootdev);
                return;
        }
        dev = dp->dev;
        while(*cp && *cp != '/')
                cp++;
        ptype = dp->type;
        dp = findtype(&cp);
        if (dp->att && dp->type == T_DISK) {
                bootdev_class = DV_DISK;
                bootdev_type = ptype;
                bootdev_unit = getpno(&cp);
                return;
        }
        printf("Warning: boot device unrecognized: %s\n", bp);
}

int
getpno(char **cp)
{
        int val = 0, digit;
        char *cx = *cp;

        while (*cx) {
                if (*cx >= '0' && *cx <= '9')
                        digit = *cx - '0';
                else if (*cx >= 'a' && *cx <= 'f')
                        digit = *cx - 'a' + 0x0a;
                else
                        break;
                val = val * 16 + digit;
                cx++;
        }
        *cp = cx;
        return (val);
}

void
device_register(struct device *dev, void *aux)
{
#if NSD > 0
        extern struct cfdriver scsibus_cd;
#endif
        const char *drvrname = dev->dv_cfdata->cf_driver->cd_name;
        const char *name = dev->dv_xname;

        if (bootdv != NULL || dev->dv_class != bootdev_class)
                return;

        switch (bootdev_type) {
#if NSD > 0
        case T_SCSI:
                if (dev->dv_parent->dv_cfdata->cf_driver == &scsibus_cd) {
                        struct scsi_attach_args *sa = aux;

                        if (sa->sa_sc_link->target == bootdev_unit)
                                bootdv = dev;
                }
#endif
        case T_IDE:
                if (strcmp(drvrname, "wd") == 0) {
                        struct ata_atapi_attach *aa = aux;

                        if (aa->aa_drv_data->drive == bootdev_unit)
                                bootdv = dev;
                }
                break;
        case T_IFACE:
                if (strcmp(name, bootdev) == 0)
                        bootdv = dev;
                break;
        default:
                break;
        }
}

void
diskconf(void)
{
        printf("bootpath: %s\n", bootpath);

#if NMPATH > 0
        if (bootdv != NULL)
                bootdv = mpath_bootdv(bootdv);
#endif

        setroot(bootdv, 0, RB_USERREQ);
        dumpconf();
}

const struct nam2blk nam2blk[] = {
        { "wd",         0 },
        { "sd",         2 },
        { "cd",         3 },
        { "vnd",        14 },
        { "rd",         17 },
        { NULL,         -1 }
};