8354 sync regcomp(3C) with upstream (fix make catalog)

[unleashed/tickless.git] / usr / src / uts / sun4u / serengeti / io / sbdp.c

/*
 * 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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/conf.h>
#include <sys/ddi_impldefs.h>
#include <sys/autoconf.h>
#include <sys/systm.h>
#include <sys/modctl.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/ndi_impldefs.h>
#include <sys/promif.h>
#include <sys/stat.h>
#include <sys/kmem.h>
#include <sys/promif.h>
#include <sys/conf.h>
#include <sys/obpdefs.h>
#include <sys/cpuvar.h>
#include <vm/seg_kmem.h>
#include <sys/prom_plat.h>
#include <sys/machsystm.h>
#include <sys/note.h>
#include <sys/memlist.h>
#include <sys/ssm.h>

#include <sys/sbd_ioctl.h>
#include <sys/sbd.h>
#include <sys/sbdp_priv.h>
#include <sys/sbdp_mem.h>
#include <sys/sbdp_error.h>
#include <sys/serengeti.h>

#include <sys/sgsbbc.h>         /* To get fn_t type definition */

/*
 * Config information
 */
#ifdef DEBUG
uint_t sbdp_debug = 0x0;
#endif /* DEBUG */

/*
 * Enable or disable dr
 */
int sbdp_dr_available = 1;

/* name properties for some Serengeti device nodes */
#define CMP_DEVNAME             "cmp"
#define MEM_DEVNAME             "memory"
#define CPU_DEVNAME             "cpu"
#define IO_PCI_DEVNAME          "pci"
#define IO_SGHSC_DEVNAME        "sghsc"
#define IO_WCI_DEVNAME          "wci"

static  sbd_devattr_t   sbdp_devattr[] = {
        { CMP_DEVNAME,          "cmp",                  SBD_COMP_CMP },
        { MEM_DEVNAME,          "memory-controller",    SBD_COMP_MEM },
        { CPU_DEVNAME,          "cpu",                  SBD_COMP_CPU },
        { IO_PCI_DEVNAME,       "pci",                  SBD_COMP_IO },
        { IO_SGHSC_DEVNAME,     "sghsc",                SBD_COMP_IO },
        { IO_WCI_DEVNAME,       "wci",                  SBD_COMP_IO },
        /* last item must be blank */
        { NULL,                 NULL,                   SBD_COMP_UNKNOWN }
};

/*
 * In the case of a busy mbox, if a status cmd comes in we return a cached
 * copy.  This cache is a link list of wnodes that contains bd structs with
 * the appropriate info.  When a new wnode is created a whole entry is added
 * to the list.
 */
sbdp_wnode_t    *first_node = NULL; /* first wnode. Entry to the link list */
int             cur_num_wnodes = 0; /* how many nodes are currently running */

/* Macros to access fields in the previous array */
#define SBDP_CT(i)              sbdp_devattr[i].s_dnodetype
#define SBDP_DEVNAME(i)         sbdp_devattr[(i)].s_devname
#define SBDP_OTYPE(i)           sbdp_devattr[(i)].s_obp_type

/*
 * Prototypes
 */
sbdp_wnode_t *sbdp_get_wnodep(int);

/*
 * Module linkage information for the kernel.
 */

static struct modlmisc modlmisc = {
        &mod_miscops,
        "Serengeti sbdp",
};

static struct modlinkage modlinkage = {
        MODREV_1,
        (void *)&modlmisc,
        NULL
};

/*
 * VA area used during CPU shutdown.
 */
caddr_t sbdp_shutdown_va;

/*
 * Mutex to protect our inventory
 */
kmutex_t        sbdp_wnode_mutex;

int
_init(void)
{
        int e;

        e = mod_install(&modlinkage);
        if (e != 0)
                return (e);

        sbdp_shutdown_va = vmem_alloc(heap_arena, PAGESIZE, VM_SLEEP);
        ASSERT(sbdp_shutdown_va != NULL);
        sbdp_valp = (uint64_t *)vmem_alloc(static_alloc_arena,
            sizeof (uint64_t), VM_SLEEP);

        mutex_init(&sbdp_wnode_mutex, NULL, MUTEX_DRIVER, NULL);
        return (e);
}

int
_fini(void)
{
        int e;

        /*
         * Remove the module.
         */
        e = mod_remove(&modlinkage);
        if (e != 0)
                return (e);

        vmem_free(heap_arena, sbdp_shutdown_va, PAGESIZE);
        sbdp_shutdown_va = NULL;
        vmem_free(static_alloc_arena, (void *)sbdp_valp, sizeof (uint64_t));
        sbdp_valp = NULL;

        mutex_destroy(&sbdp_wnode_mutex);
        return (e);
}

int
_info(struct modinfo *modinfop)
{
        return (mod_info(&modlinkage, modinfop));
}

int
sbdp_get_bd_and_wnode_num(pnode_t nodeid, int *bd, int *wnode)
{
        int portid;
        static fn_t     f = "sbdp_get_bd_and_wnode_num";
        extern int      get_portid(pnode_t node, pnode_t *cmpp);

        SBDP_DBG_FUNC("%s\n", f);

        if (sbdp_is_node_bad(nodeid))
                return (-1);

        if ((portid = get_portid(nodeid, NULL)) == -1)
                return (-1);

        /*
         * decode the board number
         */
        *bd = SG_PORTID_TO_BOARD_NUM(portid);
        *wnode = SG_PORTID_TO_NODEID(portid);

        return (0);
}

int
sbdp_get_board_num(sbdp_handle_t *hp, dev_info_t *dip)
{
        _NOTE(ARGUNUSED(hp))

        pnode_t         nodeid;
        int             bd, wnode;
        static fn_t     f = "sbdp_get_board_num";

        SBDP_DBG_FUNC("%s\n", f);

        if (dip == NULL)
                return (-1);

        nodeid = ddi_get_nodeid(dip);

        /*
         * Portid has encoded the nodeid and the agent id.  The top
         * 4 bits are correspond to the wcnodeid and the lower 5 are the
         * agent id.
         * Each agent id represents a physical location hence we can
         * obtain the board number
         */
        if (sbdp_get_bd_and_wnode_num(nodeid, &bd, &wnode) < 0)
                return (-1);

        return (bd);
}


sbd_devattr_t *
sbdp_get_devattr(void)
{
        return (&sbdp_devattr[0]);
}

int
sbdp_portid_to_cpu_unit(int cmp, int core)
{
        return (SG_PORTID_TO_CPU_UNIT(cmp, core));
}

int
sbdp_get_unit_num(sbdp_handle_t *hp, dev_info_t *dip)
{
        int             unit = -1;
        int             portid;
        processorid_t   cpuid;
        sbd_comp_type_t type;
        char            dev_type[OBP_MAXPROPNAME];
        int             i;
        pnode_t         nodeid;
        static fn_t     f = "sbdp_get_unit_num";

        SBDP_DBG_FUNC("%s\n", f);

        if (dip == NULL)
                return (-1);

        nodeid = ddi_get_nodeid(dip);

        if (sbdp_is_node_bad(nodeid))
                return (-1);

        if (prom_getprop(nodeid, "device_type", (caddr_t)dev_type) < 0) {
                SBDP_DBG_MISC("%s: couldn't get device_type\n", f);
                return (-1);
        }

        for (i = 0; SBDP_CT(i) != SBD_COMP_UNKNOWN; i++) {
                if (strcmp(dev_type, SBDP_OTYPE(i)) != 0)
                        continue;
                type = SBDP_CT(i);
        }

        switch (type) {
        case SBD_COMP_CPU:
                if ((cpuid = sbdp_get_cpuid(hp, dip)) != -1) {
                        unit = SG_CPUID_TO_CPU_UNIT(cpuid);
                }
                break;
        case SBD_COMP_MEM:
                unit = 0;
                break;
        case SBD_COMP_IO: {
                regspace_t      regs[3];
                int             len = 0;

                /*
                 * Check to see if this is a cpci node
                 * cpci nodes are assign unit nums of 5 for now
                 * So they don't conflict with the pci unit nums
                 */

                if (strcmp(dev_type, "sghsc") == 0) {
                        SBDP_DBG_MISC("it is a sghsc\n");
                        return (4);
                }

                if (prom_getprop(nodeid, "portid", (caddr_t)&portid) <= 0) {
                        SBDP_DBG_MISC("%s: couldn't get portid\n", f);
                        return (-1);
                }

                len = prom_getproplen(nodeid, "reg");
                if (len <= 0) {
                        SBDP_DBG_MISC("%s: couldn't get length\n", f);
                        return (-1);
                }

                if (prom_getprop(nodeid, "reg", (caddr_t)regs) < 0) {
                        SBDP_DBG_MISC("%s: couldn't get registers\n", f);
                        return (-1);
                }

                if ((portid % 2) != 0)
                        if ((regs[0].regspec_addr_lo & 0x700000) ==
                            0x700000)
                                unit = 0;
                        else
                                unit = 1;
                else
                        if ((regs[0].regspec_addr_lo & 0x700000) ==
                            0x700000)
                                unit = 2;
                        else
                                unit = 3;

                SBDP_DBG_MISC("unit is %d\n", unit);
                break;
        }
        default:
                break;

        }

        return (unit);
}

struct sbdp_mem_dip {
        sbdp_bd_t       *bdp;
        dev_info_t      *dip;
};

static int
sbdp_get_mem_dip(pnode_t node, void *arg, uint_t flags)
{
        _NOTE(ARGUNUSED(flags))

        struct sbdp_mem_dip     *smdp = (struct sbdp_mem_dip *)arg;
        mem_op_t        mem = {0};

        if (node == OBP_NONODE || node == OBP_BADNODE)
                return (DDI_FAILURE);

        mem.nodes = smdp->bdp->nodes;
        mem.board = smdp->bdp->bd;
        mem.nmem  = smdp->bdp->nnum;

        (void) sbdp_is_mem(node, &mem);

        /*
         * We need to find the dip only for the first nodeid
         */
        if (smdp->bdp->nnum == 0 && mem.nmem == 1) {
                ASSERT(smdp->dip == NULL);
                smdp->dip = e_ddi_nodeid_to_dip(node);
        }

        smdp->bdp->nnum = mem.nmem;

        return (DDI_SUCCESS);
}


/*
 * Update the board info.  Required after a copy rename
 */
void
sbdp_update_bd_info(sbdp_bd_t *bdp)
{
        attach_pkt_t            apkt, *apktp = &apkt;
        struct sbdp_mem_dip     smd = {0};
        static fn_t     f = "sbdp_update_bd_info";

        SBDP_DBG_FUNC("%s\n", f);

        if (bdp == NULL) {
                return;
        }
        /*
         * Grab the lock
         */
        mutex_enter(&bdp->bd_mutex);

        /*
         * we get the top nodes here.  This will have a side effect of
         * updating the present bit for cpus
         */
        apktp->node = bdp->wnode;
        apktp->board = bdp->bd;
        apktp->num_of_nodes = 0;
        apktp->flags = 0;
        sbdp_walk_prom_tree(prom_rootnode(), sbdp_select_top_nodes,
            (void *) apktp);

        /*
         * We need to clear nnum since we are looking again for the
         * nodes
         */
        bdp->nnum = 0;
        smd.bdp = bdp;

        /*
         * If a dip is found by sbdp_get_mem_dip(), it will be
         * returned held
         */
        sbdp_walk_prom_tree(prom_rootnode(), sbdp_get_mem_dip, &smd);
        if (smd.dip != NULL) {
                sbdp_handle_t           *hp;

                hp = kmem_zalloc(sizeof (sbdp_handle_t), KM_SLEEP);
                hp->h_board = bdp->bd;
                hp->h_wnode = bdp->wnode;
                hp->h_err = kmem_zalloc(sizeof (*hp->h_err), KM_SLEEP);
                if (bdp->ml != NULL) {
                        (void) sbdp_del_memlist(hp, bdp->ml);
                }
                bdp->ml = sbdp_get_memlist(hp, (dev_info_t *)NULL);
                /*
                 * if the board doesn't have banks initialize them,
                 * otherwise we assume they have been updated if
                 * necessary
                 */
                if (bdp->banks == NULL) {
                        sbdp_init_bd_banks(bdp);
                }
#ifdef DEBUG
                sbdp_print_bd_banks(bdp);
#endif

                if (sbdphw_get_base_physaddr(hp, smd.dip, &bdp->bpa))
                        bdp->bpa = -1;
                ddi_release_devi(smd.dip);
                kmem_free(hp->h_err, sizeof (*hp->h_err));
                kmem_free(hp, sizeof (sbdp_handle_t));
        }
        mutex_exit(&bdp->bd_mutex);
}

/*
 * Initialize the board struct.  This remains cached.  We update it
 * every time we have a successful show_board and after a copy-rename
 */
void
sbdp_bd_init(sbdp_bd_t *bdp, int bd, int wnode)
{
        static fn_t     f = "sbdp_bd_init";

        SBDP_DBG_FUNC("%s\n", f);

        bdp->bd = bd;
        bdp->wnode = wnode;

        SBDP_UNSET_ALL_CPUS_IN_RESET(bdp);

        bdp->cpus_present = 0;

        sbdp_update_bd_info(bdp);

        mutex_init(&bdp->bd_mutex, NULL, MUTEX_DRIVER, NULL);
        bdp->bd_sc = (show_board_t *)kmem_zalloc(sizeof (show_board_t),
            KM_SLEEP);
        bdp->valid_cp = -1;
}

/*
 * This entry is going away.  Clean up
 */
void
sbdp_bd_fini(sbdp_bd_t *bdp)
{
        static fn_t     f = "sbdp_bd_fini";

        SBDP_DBG_FUNC("%s\n", f);

        sbdp_cleanup_bd(bdp->wnode, bdp->bd);
        kmem_free(bdp->bd_sc, sizeof (show_board_t));
        bdp->bd_sc = NULL;
        mutex_destroy(&bdp->bd_mutex);
#ifdef DEBUG
        sbdp_print_all_segs();
#endif
}

/*
 * A new wnode has arrived.  Initialize the struct and create
 * the board structures.
 */
void
sbdp_wnode_init(sbdp_wnode_t *wnodep, int wnode, int boards)
{
        int             i;
        static fn_t     f = "sbdp_wnode_init";

        SBDP_DBG_FUNC("%s\n", f);

        wnodep->wnode = wnode;
        wnodep->nbds = boards;
        wnodep->bds = kmem_zalloc(sizeof (sbdp_bd_t) * boards, KM_SLEEP);
        wnodep->next = wnodep->prev = NULL;

        for (i = 0; i < boards; i++)
                sbdp_bd_init(&wnodep->bds[i], i, wnode);
}

/*
 * Wnode got DRed out.  Clean up all the node stuff including the boards
 */
void
sbdp_wnode_fini(sbdp_wnode_t *wnodep)
{
        int     boards;
        int     i;
        static fn_t     f = "sbdp_wnode_fini";

        SBDP_DBG_FUNC("%s\n", f);

        boards = wnodep->nbds;

        for (i = 0; i < boards; i++)
                sbdp_bd_fini(&wnodep->bds[i]);

        kmem_free(wnodep->bds, sizeof (sbdp_bd_t) * boards);
        wnodep->next = wnodep->prev = NULL;
        kmem_free(wnodep, sizeof (sbdp_wnode_t));
}

/*
 * Add all the necessary fields to this board's struct
 */
void
sbdp_add_new_bd_info(int wnode, int board)
{
        sbdp_wnode_t    *cur;
        static fn_t     f = "sbdp_add_new_bd_info";

        SBDP_DBG_FUNC("%s\n", f);

        cur = sbdp_get_wnodep(wnode);

        SBDP_DBG_MISC("adding new board info %d\n", board);

        sbdp_update_bd_info(&cur->bds[board]);

}

/*
 * This board has gone away.  Clean the necessary fields
 */
void
sbdp_cleanup_bd(int wnode, int board)
{
        sbdp_wnode_t    *cur;
        sbdp_handle_t   handle, *hp;
        sbdp_bd_t       *bdp;
        int             i;
        static fn_t     f = "sbdp_cleanup_bd";

        SBDP_DBG_FUNC("%s\n", f);

        cur = sbdp_get_wnodep(wnode);

        SBDP_DBG_MISC("cleaning up bd info for bd %d\n", board);
        if (cur == NULL) {
                SBDP_DBG_MISC("cur is null\n");
                return;
        }

        bdp = &cur->bds[board];

        /*
         * Grab the lock
         */
        mutex_enter(&bdp->bd_mutex);

        for (i = 0; i < bdp->nnum; i++)
                bdp->nodes[i] = (pnode_t)0;
        bdp->nnum = 0;

        sbdp_fini_bd_banks(bdp);

        hp = &handle;
        hp->h_board = bdp->bd;
        hp->h_wnode = bdp->wnode;
        if (bdp->ml) {
                (void) sbdp_del_memlist(hp, bdp->ml);
        }

        bdp->ml = NULL;

        bdp->bpa = -1;

        sbdp_cpu_in_reset(wnode, bdp->bd, SBDP_ALL_CPUS, 0);

        bdp->cpus_present = 0;

        mutex_exit(&bdp->bd_mutex);
}

/*
 *  Traverse the list looking for wnode. Return it when found
 */
sbdp_wnode_t *
sbdp_get_wnodep(int wnode)
{
        sbdp_wnode_t    *cur;
        int             i;
        static fn_t     f = "sbdp_get_wnodep";

        SBDP_DBG_FUNC("%s\n", f);

        mutex_enter(&sbdp_wnode_mutex);
        for (i = 0, cur = first_node; i < cur_num_wnodes; i++,
            cur = cur->next) {
                if (cur->wnode == wnode) {
                        mutex_exit(&sbdp_wnode_mutex);
                        return (cur);
                }
        }
        mutex_exit(&sbdp_wnode_mutex);

        return (NULL);
}

/*
 * Insert this brand new node into our master list. It leaves it all
 * initialized
 */
void
sbdp_insert_wnode(int wnode, int max_boards)
{
        sbdp_wnode_t    *wnodep;
        sbdp_wnode_t    *cur;
        static fn_t     f = "sbdp_insert_wnode";

        SBDP_DBG_FUNC("%s\n", f);

        wnodep = kmem_zalloc(sizeof (sbdp_wnode_t), KM_SLEEP);

        mutex_enter(&sbdp_wnode_mutex);
        if (first_node == NULL) {
                first_node = wnodep;
                cur_num_wnodes++;
        } else {
                cur = first_node + cur_num_wnodes++;
                cur->next = wnodep;
                wnodep->prev = cur;
        }
        mutex_exit(&sbdp_wnode_mutex);
        sbdp_wnode_init(wnodep, wnode, max_boards);
}

/*
 * This node is gone.  Remove it from the list and also clean up
 */
void
sbdp_remove_wnode(sbdp_wnode_t *wnodep)
{
        sbdp_wnode_t    *cur;
        static fn_t     f = "sbdp_remove_wnode";

        SBDP_DBG_FUNC("%s\n", f);

        if (wnodep != NULL) {
                sbdp_wnode_fini(wnodep);
                mutex_enter(&sbdp_wnode_mutex);

                if (first_node == wnodep)
                        first_node = NULL;
                else {
                        cur = wnodep->prev;
                        if (cur != NULL)
                                cur->next = wnodep->next;
                        if (wnodep->next != NULL)
                                wnodep->next->prev = cur;
                }

                cur_num_wnodes--;
                mutex_exit(&sbdp_wnode_mutex);
        }
}

/*
 * Entry point from sbd.  This is called when a new node is added.  We
 * create an entry in our inventory and initialize all the stuff that will be
 * needed
 */
int
sbdp_setup_instance(caddr_t arg)
{
        ssm_sbdp_info_t *sbdp_info;
        int             instance;
        int             wnode;
        int             max_boards;
        static fn_t     f = "sbdp_setup_instance";

        SBDP_DBG_FUNC("%s\n", f);

        /*
         * We get this directly from ssm
         */
        sbdp_info = (ssm_sbdp_info_t *)arg;

        instance = sbdp_info->instance;
        wnode = sbdp_info->wnode;
        max_boards = plat_max_boards();

        SBDP_DBG_MISC("sbdp_setup_instance: instance %d wnode %d\n", instance,
            sbdp_info->wnode);

        if (sbdp_get_wnodep(wnode) == NULL) {
                /*
                 * This node has not been instanstiated
                 * create one
                 */
                sbdp_insert_wnode(wnode, max_boards);
        }

        return (DDI_SUCCESS);
}

/*
 * Entry point from sbd. This is called when a node has been removed (or is
 * going away. We do all the necessary cleanup
 */
int
sbdp_teardown_instance(caddr_t arg)
{
        ssm_sbdp_info_t *sbdp_info;
        int             instance;
        int             wnode;
        sbdp_wnode_t    *wnodep;
        static fn_t     f = "sbdp_teardown_instance";

        SBDP_DBG_FUNC("%s\n", f);

        /*
         * ssm should have set this up
         */
        sbdp_info = (ssm_sbdp_info_t *)arg;

        instance = sbdp_info->instance;
        wnode = sbdp_info->wnode;

        SBDP_DBG_MISC("sbdp_teardown_instance: instance %d wnode %d\n",
            instance, wnode);

        /*
         * Find this node and then remove it
         */
        if ((wnodep = sbdp_get_wnodep(wnode)) != NULL) {
                sbdp_remove_wnode(wnodep);
        }
        return (DDI_SUCCESS);
}

int
sbdp_disabled_component(sbdp_handle_t *hp)
{
#ifdef lint
        hp = hp;
#endif
        return (0);
}

/* ARGSUSED */
int
sbdp_release_component(sbdp_handle_t *hp, dev_info_t *dip)
{
        return (0);
}

void
sbdp_set_err(sbd_error_t *ep, int ecode, char *rsc)
{
        static fn_t     f = "sbdp_set_err";

        SBDP_DBG_FUNC("%s\n", f);
        ASSERT(ep != NULL);
        ep->e_code = ecode;

        if (rsc != NULL) {
                (void) strcpy((caddr_t)(ep->e_rsc), (caddr_t)rsc);
        }
}

/*
 * Serengeti DR passthrus are for debugging purposes only.
 */
static struct {
        const char      *name;
        int             (*handler)(sbdp_handle_t *, void *);
} sbdp_passthrus[] = {
#ifdef DEBUG
        { "readmem",            sbdp_passthru_readmem           },
        { "prep-script",        sbdp_passthru_prep_script       },
        { "test-quiesce",       sbdp_passthru_test_quiesce      },
        { "inject-error",       sbdp_passthru_inject_error      },
        { "reset-error",        sbdp_passthru_reset_error       },
#endif

        /* the following line must always be last */
        { NULL,                 NULL                            }
};


/*ARGSUSED*/
int
sbdp_ioctl(sbdp_handle_t *hp, sbdp_ioctl_arg_t *sbdpi)
{
#ifdef DEBUG
        char buf[512];
        int rv;
        sbd_ioctl_arg_t *sbdi   = (sbd_ioctl_arg_t *)sbdpi->h_iap;
        int             i;
        static fn_t     f = "sbdp_ioctl";

        SBDP_DBG_FUNC("%s\n", f);

        if (sbdi->i_len >= sizeof (buf) ||
            ddi_copyin(sbdi->i_opts, buf, sbdi->i_len, sbdpi->h_mode)) {
                sbdp_set_err(hp->h_err, ESBD_FAULT, NULL);
                return (-1);
        }

        i = 0;
        while (sbdp_passthrus[i].name != NULL) {
                int     len;

                len = strlen(sbdp_passthrus[i].name);
                if (strncmp(sbdp_passthrus[i].name, buf, len) == 0)
                        break;
                i++;
        }

        if (sbdp_passthrus[i].name == NULL) {
                sbdp_set_err(hp->h_err, ESBD_INVAL, NULL);
                rv = EIO;
        } else {
                rv = (*sbdp_passthrus[i].handler)(hp, buf);
                if (rv != ESBD_NOERROR) {
                        sbdp_set_err(hp->h_err, rv, NULL);
                        rv = EIO;
                }

        }

        return (rv);
#else
        return (0);
#endif
}

/*
 * Check the dnode we obtained.  Need to find a better way to determine
 * if the node has the correct starting address
 */
int
sbdp_is_node_bad(pnode_t node)
{
        static fn_t     f = "sbdp_is_node_bad";

        SBDP_DBG_FUNC("%s\n", f);

        return ((node == OBP_NONODE) || (node == OBP_BADNODE) ||
            ((node & 0x80000000u) != 0x80000000u));
}

/*
 * Retrieve the information we have on this board from
 * the inventory
 */
sbdp_bd_t *
sbdp_get_bd_info(int wnode, int board)
{
        sbdp_wnode_t    *wnodep;
        sbdp_bd_t       *bdp;
        int             max_bds;
        static fn_t     f = "sbdp_get_bd_info";

        SBDP_DBG_FUNC("%s\n", f);

        wnodep = sbdp_get_wnodep(wnode);
        max_bds = plat_max_boards();

        if ((wnodep == NULL) || ((board < 0) && (board > max_bds))) {
                return (NULL);
        }

        bdp = &wnodep->bds[board];

        /*
         * We might not have the complete bd info.  With cheetah we
         * cannot access the memory decode registers when then cpu is
         * in reset. If the mem info is incomplete, then we try to gather it
         * here
         */
        sbdp_update_bd_info(bdp);

        return (bdp);
}

/*
 * There are certain cases where obp marks components as failed
 * If the status is ok the node won't have any status property. It
 * is only there if the status is other than ok.
 */
sbd_cond_t
sbdp_get_comp_status(pnode_t nodeid)
{
        char                    status_buf[OBP_MAXPROPNAME];
        static const char       *status = "status";
        static const char       *failed = "fail";
        static const char       *disabled = "disabled";
        static fn_t             f = "sbdp_get_comp_status";

        SBDP_DBG_FUNC("%s\n", f);

        if (sbdp_is_node_bad(nodeid)) {
                SBDP_DBG_STATE("node is not ok\n");
                return (SBD_COND_UNKNOWN);
        }

        if (prom_getproplen(nodeid, (char *)status) <= 0) {
                SBDP_DBG_STATE("status is ok\n");
                return (SBD_COND_OK);
        }

        if (prom_getprop(nodeid, (char *)status, status_buf) < 0) {
                SBDP_DBG_STATE("status is unknown\n");
                return (SBD_COND_UNKNOWN);
        }

        if (strncmp(status_buf, failed, strlen(failed)) == 0) {
                SBDP_DBG_STATE("status of failed\n");
                return (SBD_COND_FAILED);
        }

        if (strcmp(status_buf, disabled) == 0) {
                SBDP_DBG_STATE("status of unusable\n");
                return (SBD_COND_UNUSABLE);
        }

        return (SBD_COND_OK);
}

void
sbdp_cpu_in_reset(int node, int bd, int unit, int reset)
{
        sbdp_wnode_t    *cur;
        sbdp_bd_t       *bdp;
        static fn_t     f = "sbdp_cpu_in_reset";

        SBDP_DBG_FUNC("%s\n", f);

        if ((unit < -1) || (bd < 0) || (node < 0)) {
                return;
        }

        cur = sbdp_get_wnodep(node);

        SBDP_DBG_MISC("marking cpu %d %s for board %d\n", unit,
            (reset) ? "in reset" : "out of reset", bd);

        if (cur == NULL) {
                return;
        }

        bdp = &cur->bds[bd];

        if (unit == SBDP_ALL_CPUS)
                if (reset == 1)
                        SBDP_SET_ALL_CPUS_IN_RESET(bdp);
                else
                        SBDP_UNSET_ALL_CPUS_IN_RESET(bdp);
        else
                if (reset == 1)
                        SBDP_SET_CPU_IN_RESET(bdp, unit);
                else
                        SBDP_UNSET_CPU_IN_RESET(bdp, unit);
}

int
sbdp_set_cpu_present(int node, int bd, int unit)
{
        sbdp_wnode_t    *cur;
        sbdp_bd_t       *bdp;
        static fn_t     f = "sbdp_set_cpu_present";

        SBDP_DBG_FUNC("%s\n", f);

        if ((unit < 0) || (bd < 0) || (node < 0)) {
                return (-1);
        }

        cur = sbdp_get_wnodep(node);
        if (cur == NULL) {
                return (-1);
        }

        bdp = &cur->bds[bd];

        SBDP_SET_CPU_PRESENT(bdp, unit);

        return (0);
}

int
sbdp_is_cpu_present(int node, int bd, int unit)
{
        sbdp_wnode_t    *cur;
        sbdp_bd_t       *bdp;
        static fn_t     f = "sbdp_is_cpu_present";

        SBDP_DBG_FUNC("%s\n", f);

        if ((unit < 0) || (bd < 0) || (node < 0)) {
                return (-1);
        }

        cur = sbdp_get_wnodep(node);
        if (cur == NULL) {
                return (-1);
        }

        bdp = &cur->bds[bd];

        return (SBDP_IS_CPU_PRESENT(bdp, unit));
}

int
sbdp_is_cpu_in_reset(int node, int bd, int unit)
{
        sbdp_wnode_t    *cur;
        sbdp_bd_t       *bdp;
        static fn_t     f = "sbdp_is_cpu_in_reset";

        SBDP_DBG_FUNC("%s\n", f);

        if ((unit < 0) || (bd < 0) || (node < 0)) {
                return (-1);
        }

        cur = sbdp_get_wnodep(node);

        if (cur == NULL) {
                return (-1);
        }

        bdp = &cur->bds[bd];

        return (SBDP_IS_CPU_IN_RESET(bdp, unit));
}

int
sbdp_dr_avail(void)
{
        static fn_t     f = "sbdp_dr_avail";

        SBDP_DBG_FUNC("%s\n", f);

        if (sbdp_dr_available)
                if (sg_prom_sb_dr_check() == 0)
                        return (1);
        return (0);
}