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

[unleashed/tickless.git] / usr / src / uts / intel / io / pci / pci_boot.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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2015 Joyent, Inc.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/sunndi.h>
#include <sys/pci.h>
#include <sys/pci_impl.h>
#include <sys/pcie_impl.h>
#include <sys/memlist.h>
#include <sys/bootconf.h>
#include <io/pci/mps_table.h>
#include <sys/pci_cfgacc.h>
#include <sys/pci_cfgspace.h>
#include <sys/pci_cfgspace_impl.h>
#include <sys/psw.h>
#include "../../../../common/pci/pci_strings.h"
#include <sys/apic.h>
#include <io/pciex/pcie_nvidia.h>
#include <sys/hotplug/pci/pciehpc_acpi.h>
#include <sys/acpi/acpi.h>
#include <sys/acpica.h>
#include <sys/iommulib.h>
#include <sys/devcache.h>
#include <sys/pci_cfgacc_x86.h>

#define pci_getb        (*pci_getb_func)
#define pci_getw        (*pci_getw_func)
#define pci_getl        (*pci_getl_func)
#define pci_putb        (*pci_putb_func)
#define pci_putw        (*pci_putw_func)
#define pci_putl        (*pci_putl_func)
#define dcmn_err        if (pci_boot_debug) cmn_err

#define CONFIG_INFO     0
#define CONFIG_UPDATE   1
#define CONFIG_NEW      2
#define CONFIG_FIX      3
#define COMPAT_BUFSIZE  512

#define PPB_IO_ALIGNMENT        0x1000          /* 4K aligned */
#define PPB_MEM_ALIGNMENT       0x100000        /* 1M aligned */
/* round down to nearest power of two */
#define P2LE(align)                                     \
        {                                               \
                int i = 0;                              \
                while (align >>= 1)                     \
                        i ++;                           \
                align = 1 << i;                         \
        }                                               \

/* for is_vga and list_is_vga_only */

enum io_mem {
        IO,
        MEM
};

/* See AMD-8111 Datasheet Rev 3.03, Page 149: */
#define LPC_IO_CONTROL_REG_1    0x40
#define AMD8111_ENABLENMI       (uint8_t)0x80
#define DEVID_AMD8111_LPC       0x7468

struct pci_fixundo {
        uint8_t                 bus;
        uint8_t                 dev;
        uint8_t                 fn;
        void                    (*undofn)(uint8_t, uint8_t, uint8_t);
        struct pci_fixundo      *next;
};

struct pci_devfunc {
        struct pci_devfunc *next;
        dev_info_t *dip;
        uchar_t dev;
        uchar_t func;
        boolean_t reprogram;    /* this device needs to be reprogrammed */
};

extern int apic_nvidia_io_max;
extern int pseudo_isa;
extern int pci_bios_maxbus;
static uchar_t max_dev_pci = 32;        /* PCI standard */
int pci_boot_debug = 0;
extern struct memlist *find_bus_res(int, int);
static struct pci_fixundo *undolist = NULL;
static int num_root_bus = 0;    /* count of root buses */
extern volatile int acpi_resource_discovery;
extern uint64_t mcfg_mem_base;
extern void pci_cfgacc_add_workaround(uint16_t, uchar_t, uchar_t);
extern dev_info_t *pcie_get_rc_dip(dev_info_t *);

/*
 * Module prototypes
 */
static void enumerate_bus_devs(uchar_t bus, int config_op);
static void create_root_bus_dip(uchar_t bus);
static void process_devfunc(uchar_t, uchar_t, uchar_t, uchar_t,
    ushort_t, int);
static void add_compatible(dev_info_t *, ushort_t, ushort_t,
    ushort_t, ushort_t, uchar_t, uint_t, int);
static int add_reg_props(dev_info_t *, uchar_t, uchar_t, uchar_t, int, int);
static void add_ppb_props(dev_info_t *, uchar_t, uchar_t, uchar_t, int,
    ushort_t);
static void add_model_prop(dev_info_t *, uint_t);
static void add_bus_range_prop(int);
static void add_bus_slot_names_prop(int);
static void add_ranges_prop(int, int);
static void add_bus_available_prop(int);
static int get_pci_cap(uchar_t bus, uchar_t dev, uchar_t func, uint8_t cap_id);
static void fix_ppb_res(uchar_t, boolean_t);
static void alloc_res_array();
static void create_ioapic_node(int bus, int dev, int fn, ushort_t vendorid,
    ushort_t deviceid);
static void pciex_slot_names_prop(dev_info_t *, ushort_t);
static void populate_bus_res(uchar_t bus);
static void memlist_remove_list(struct memlist **list,
    struct memlist *remove_list);
static void ck804_fix_aer_ptr(dev_info_t *, pcie_req_id_t);

static void pci_scan_bbn(void);
static int pci_unitaddr_cache_valid(void);
static int pci_bus_unitaddr(int);
static void pci_unitaddr_cache_create(void);

static int pci_cache_unpack_nvlist(nvf_handle_t, nvlist_t *, char *);
static int pci_cache_pack_nvlist(nvf_handle_t, nvlist_t **);
static void pci_cache_free_list(nvf_handle_t);

extern int pci_slot_names_prop(int, char *, int);

/* set non-zero to force PCI peer-bus renumbering */
int pci_bus_always_renumber = 0;

/*
 * used to register ISA resource usage which must not be made
 * "available" from other PCI node' resource maps
 */
static struct {
        struct memlist *io_used;
        struct memlist *mem_used;
} isa_res;

/*
 * PCI unit-address cache management
 */
static nvf_ops_t pci_unitaddr_cache_ops = {
        "/etc/devices/pci_unitaddr_persistent", /* path to cache */
        pci_cache_unpack_nvlist,                /* read in nvlist form */
        pci_cache_pack_nvlist,                  /* convert to nvlist form */
        pci_cache_free_list,                    /* free data list */
        NULL                                    /* write complete callback */
};

typedef struct {
        list_node_t     pua_nodes;
        int             pua_index;
        int             pua_addr;
} pua_node_t;

nvf_handle_t    puafd_handle;
int             pua_cache_valid = 0;


/*ARGSUSED*/
static ACPI_STATUS
pci_process_acpi_device(ACPI_HANDLE hdl, UINT32 level, void *ctx, void **rv)
{
        ACPI_BUFFER     rb;
        ACPI_OBJECT     ro;
        ACPI_DEVICE_INFO *adi;
        int             busnum;

        /*
         * Use AcpiGetObjectInfo() to find the device _HID
         * If not a PCI root-bus, ignore this device and continue
         * the walk
         */
        if (ACPI_FAILURE(AcpiGetObjectInfo(hdl, &adi)))
                return (AE_OK);

        if (!(adi->Valid & ACPI_VALID_HID)) {
                AcpiOsFree(adi);
                return (AE_OK);
        }

        if (strncmp(adi->HardwareId.String, PCI_ROOT_HID_STRING,
            sizeof (PCI_ROOT_HID_STRING)) &&
            strncmp(adi->HardwareId.String, PCI_EXPRESS_ROOT_HID_STRING,
            sizeof (PCI_EXPRESS_ROOT_HID_STRING))) {
                AcpiOsFree(adi);
                return (AE_OK);
        }

        AcpiOsFree(adi);

        /*
         * XXX: ancient Big Bear broken _BBN will result in two
         * bus 0 _BBNs being found, so we need to handle duplicate
         * bus 0 gracefully.  However, broken _BBN does not
         * hide a childless root-bridge so no need to work-around it
         * here
         */
        rb.Pointer = &ro;
        rb.Length = sizeof (ro);
        if (ACPI_SUCCESS(AcpiEvaluateObjectTyped(hdl, "_BBN",
            NULL, &rb, ACPI_TYPE_INTEGER))) {
                busnum = ro.Integer.Value;

                /*
                 * Ignore invalid _BBN return values here (rather
                 * than panic) and emit a warning; something else
                 * may suffer failure as a result of the broken BIOS.
                 */
                if ((busnum < 0) || (busnum > pci_bios_maxbus)) {
                        dcmn_err(CE_NOTE,
                            "pci_process_acpi_device: invalid _BBN 0x%x\n",
                            busnum);
                        return (AE_CTRL_DEPTH);
                }

                /* PCI with valid _BBN */
                if (pci_bus_res[busnum].par_bus == (uchar_t)-1 &&
                    pci_bus_res[busnum].dip == NULL)
                        create_root_bus_dip((uchar_t)busnum);
                return (AE_CTRL_DEPTH);
        }

        /* PCI and no _BBN, continue walk */
        return (AE_OK);
}

/*
 * Scan the ACPI namespace for all top-level instances of _BBN
 * in order to discover childless root-bridges (which enumeration
 * may not find; root-bridges are inferred by the existence of
 * children).  This scan should find all root-bridges that have
 * been enumerated, and any childless root-bridges not enumerated.
 * Root-bridge for bus 0 may not have a _BBN object.
 */
static void
pci_scan_bbn()
{
        void *rv;

        (void) AcpiGetDevices(NULL, pci_process_acpi_device, NULL, &rv);
}

static void
pci_unitaddr_cache_init(void)
{

        puafd_handle = nvf_register_file(&pci_unitaddr_cache_ops);
        ASSERT(puafd_handle);

        list_create(nvf_list(puafd_handle), sizeof (pua_node_t),
            offsetof(pua_node_t, pua_nodes));

        rw_enter(nvf_lock(puafd_handle), RW_WRITER);
        (void) nvf_read_file(puafd_handle);
        rw_exit(nvf_lock(puafd_handle));
}

/*
 * Format of /etc/devices/pci_unitaddr_persistent:
 *
 * The persistent record of unit-address assignments contains
 * a list of name/value pairs, where name is a string representation
 * of the "index value" of the PCI root-bus and the value is
 * the assigned unit-address.
 *
 * The "index value" is simply the zero-based index of the PCI
 * root-buses ordered by physical bus number; first PCI bus is 0,
 * second is 1, and so on.
 */

/*ARGSUSED*/
static int
pci_cache_unpack_nvlist(nvf_handle_t hdl, nvlist_t *nvl, char *name)
{
        long            index;
        int32_t         value;
        nvpair_t        *np;
        pua_node_t      *node;

        np = NULL;
        while ((np = nvlist_next_nvpair(nvl, np)) != NULL) {
                /* name of nvpair is index value */
                if (ddi_strtol(nvpair_name(np), NULL, 10, &index) != 0)
                        continue;

                if (nvpair_value_int32(np, &value) != 0)
                        continue;

                node = kmem_zalloc(sizeof (pua_node_t), KM_SLEEP);
                node->pua_index = index;
                node->pua_addr = value;
                list_insert_tail(nvf_list(hdl), node);
        }

        pua_cache_valid = 1;
        return (DDI_SUCCESS);
}

static int
pci_cache_pack_nvlist(nvf_handle_t hdl, nvlist_t **ret_nvl)
{
        int             rval;
        nvlist_t        *nvl, *sub_nvl;
        list_t          *listp;
        pua_node_t      *pua;
        char            buf[13];

        ASSERT(RW_WRITE_HELD(nvf_lock(hdl)));

        rval = nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP);
        if (rval != DDI_SUCCESS) {
                nvf_error("%s: nvlist alloc error %d\n",
                    nvf_cache_name(hdl), rval);
                return (DDI_FAILURE);
        }

        sub_nvl = NULL;
        rval = nvlist_alloc(&sub_nvl, NV_UNIQUE_NAME, KM_SLEEP);
        if (rval != DDI_SUCCESS)
                goto error;

        listp = nvf_list(hdl);
        for (pua = list_head(listp); pua != NULL;
            pua = list_next(listp, pua)) {
                (void) snprintf(buf, sizeof (buf), "%d", pua->pua_index);
                rval = nvlist_add_int32(sub_nvl, buf, pua->pua_addr);
                if (rval != DDI_SUCCESS)
                        goto error;
        }

        rval = nvlist_add_nvlist(nvl, "table", sub_nvl);
        if (rval != DDI_SUCCESS)
                goto error;
        nvlist_free(sub_nvl);

        *ret_nvl = nvl;
        return (DDI_SUCCESS);

error:
        nvlist_free(sub_nvl);
        ASSERT(nvl);
        nvlist_free(nvl);
        *ret_nvl = NULL;
        return (DDI_FAILURE);
}

static void
pci_cache_free_list(nvf_handle_t hdl)
{
        list_t          *listp;
        pua_node_t      *pua;

        ASSERT(RW_WRITE_HELD(nvf_lock(hdl)));

        listp = nvf_list(hdl);
        for (pua = list_head(listp); pua != NULL;
            pua = list_next(listp, pua)) {
                list_remove(listp, pua);
                kmem_free(pua, sizeof (pua_node_t));
        }
}


static int
pci_unitaddr_cache_valid(void)
{

        /* read only, no need for rw lock */
        return (pua_cache_valid);
}


static int
pci_bus_unitaddr(int index)
{
        pua_node_t      *pua;
        list_t          *listp;
        int             addr;

        rw_enter(nvf_lock(puafd_handle), RW_READER);

        addr = -1;      /* default return if no match */
        listp = nvf_list(puafd_handle);
        for (pua = list_head(listp); pua != NULL;
            pua = list_next(listp, pua)) {
                if (pua->pua_index == index) {
                        addr = pua->pua_addr;
                        break;
                }
        }

        rw_exit(nvf_lock(puafd_handle));
        return (addr);
}

static void
pci_unitaddr_cache_create(void)
{
        int             i, index;
        pua_node_t      *node;
        list_t          *listp;

        rw_enter(nvf_lock(puafd_handle), RW_WRITER);

        index = 0;
        listp = nvf_list(puafd_handle);
        for (i = 0; i <= pci_bios_maxbus; i++) {
                /* skip non-root (peer) PCI busses */
                if ((pci_bus_res[i].par_bus != (uchar_t)-1) ||
                    (pci_bus_res[i].dip == NULL))
                        continue;
                node = kmem_zalloc(sizeof (pua_node_t), KM_SLEEP);
                node->pua_index = index++;
                node->pua_addr = pci_bus_res[i].root_addr;
                list_insert_tail(listp, node);
        }

        (void) nvf_mark_dirty(puafd_handle);
        rw_exit(nvf_lock(puafd_handle));
        nvf_wake_daemon();
}


/*
 * Enumerate all PCI devices
 */
void
pci_setup_tree(void)
{
        uint_t i, root_bus_addr = 0;

        alloc_res_array();
        for (i = 0; i <= pci_bios_maxbus; i++) {
                pci_bus_res[i].par_bus = (uchar_t)-1;
                pci_bus_res[i].root_addr = (uchar_t)-1;
                pci_bus_res[i].sub_bus = i;
        }

        pci_bus_res[0].root_addr = root_bus_addr++;
        create_root_bus_dip(0);
        enumerate_bus_devs(0, CONFIG_INFO);

        /*
         * Now enumerate peer busses
         *
         * We loop till pci_bios_maxbus. On most systems, there is
         * one more bus at the high end, which implements the ISA
         * compatibility bus. We don't care about that.
         *
         * Note: In the old (bootconf) enumeration, the peer bus
         *      address did not use the bus number, and there were
         *      too many peer busses created. The root_bus_addr is
         *      used to maintain the old peer bus address assignment.
         *      However, we stop enumerating phantom peers with no
         *      device below.
         */
        for (i = 1; i <= pci_bios_maxbus; i++) {
                if (pci_bus_res[i].dip == NULL) {
                        pci_bus_res[i].root_addr = root_bus_addr++;
                }
                enumerate_bus_devs(i, CONFIG_INFO);

                /* add slot-names property for named pci hot-plug slots */
                add_bus_slot_names_prop(i);
        }
}

/*
 * >0 = present, 0 = not present, <0 = error
 */
static int
pci_bbn_present(int bus)
{
        ACPI_HANDLE     hdl;
        int     rv;

        /* no dip means no _BBN */
        if (pci_bus_res[bus].dip == NULL)
                return (0);

        rv = -1;        /* default return value in case of error below */
        if (ACPI_SUCCESS(acpica_get_handle(pci_bus_res[bus].dip, &hdl))) {
                switch (AcpiEvaluateObject(hdl, "_BBN", NULL, NULL)) {
                case AE_OK:
                        rv = 1;
                        break;
                case AE_NOT_FOUND:
                        rv = 0;
                        break;
                default:
                        break;
                }
        }

        return (rv);
}

/*
 * Return non-zero if any PCI bus in the system has an associated
 * _BBN object, 0 otherwise.
 */
static int
pci_roots_have_bbn(void)
{
        int     i;

        /*
         * Scan the PCI busses and look for at least 1 _BBN
         */
        for (i = 0; i <= pci_bios_maxbus; i++) {
                /* skip non-root (peer) PCI busses */
                if (pci_bus_res[i].par_bus != (uchar_t)-1)
                        continue;

                if (pci_bbn_present(i) > 0)
                        return (1);
        }
        return (0);

}

/*
 * return non-zero if the machine is one on which we renumber
 * the internal pci unit-addresses
 */
static int
pci_bus_renumber()
{
        ACPI_TABLE_HEADER *fadt;

        if (pci_bus_always_renumber)
                return (1);

        /* get the FADT */
        if (AcpiGetTable(ACPI_SIG_FADT, 1, (ACPI_TABLE_HEADER **)&fadt) !=
            AE_OK)
                return (0);

        /* compare OEM Table ID to "SUNm31" */
        if (strncmp("SUNm31", fadt->OemId, 6))
                return (0);
        else
                return (1);
}

/*
 * Initial enumeration of the physical PCI bus hierarchy can
 * leave 'gaps' in the order of peer PCI bus unit-addresses.
 * Systems with more than one peer PCI bus *must* have an ACPI
 * _BBN object associated with each peer bus; use the presence
 * of this object to remove gaps in the numbering of the peer
 * PCI bus unit-addresses - only peer busses with an associated
 * _BBN are counted.
 */
static void
pci_renumber_root_busses(void)
{
        int pci_regs[] = {0, 0, 0};
        int     i, root_addr = 0;

        /*
         * Currently, we only enable the re-numbering on specific
         * Sun machines; this is a work-around for the more complicated
         * issue of upgrade changing physical device paths
         */
        if (!pci_bus_renumber())
                return;

        /*
         * If we find no _BBN objects at all, we either don't need
         * to do anything or can't do anything anyway
         */
        if (!pci_roots_have_bbn())
                return;

        for (i = 0; i <= pci_bios_maxbus; i++) {
                /* skip non-root (peer) PCI busses */
                if (pci_bus_res[i].par_bus != (uchar_t)-1)
                        continue;

                if (pci_bbn_present(i) < 1) {
                        pci_bus_res[i].root_addr = (uchar_t)-1;
                        continue;
                }

                ASSERT(pci_bus_res[i].dip != NULL);
                if (pci_bus_res[i].root_addr != root_addr) {
                        /* update reg property for node */
                        pci_bus_res[i].root_addr = root_addr;
                        pci_regs[0] = pci_bus_res[i].root_addr;
                        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE,
                            pci_bus_res[i].dip, "reg", (int *)pci_regs, 3);
                }
                root_addr++;
        }
}

void
pci_register_isa_resources(int type, uint32_t base, uint32_t size)
{
        (void) memlist_insert(
            (type == 1) ?  &isa_res.io_used : &isa_res.mem_used,
            base, size);
}

/*
 * Remove the resources which are already used by devices under a subtractive
 * bridge from the bus's resources lists, because they're not available, and
 * shouldn't be allocated to other buses.  This is necessary because tracking
 * resources for subtractive bridges is not complete.  (Subtractive bridges only
 * track some of their claimed resources, not "the rest of the address space" as
 * they should, so that allocation to peer non-subtractive PPBs is easier.  We
 * need a fully-capable global resource allocator).
 */
static void
remove_subtractive_res()
{
        int i, j;
        struct memlist *list;

        for (i = 0; i <= pci_bios_maxbus; i++) {
                if (pci_bus_res[i].subtractive) {
                        /* remove used io ports */
                        list = pci_bus_res[i].io_used;
                        while (list) {
                                for (j = 0; j <= pci_bios_maxbus; j++)
                                        (void) memlist_remove(
                                            &pci_bus_res[j].io_avail,
                                            list->ml_address, list->ml_size);
                                list = list->ml_next;
                        }
                        /* remove used mem resource */
                        list = pci_bus_res[i].mem_used;
                        while (list) {
                                for (j = 0; j <= pci_bios_maxbus; j++) {
                                        (void) memlist_remove(
                                            &pci_bus_res[j].mem_avail,
                                            list->ml_address, list->ml_size);
                                        (void) memlist_remove(
                                            &pci_bus_res[j].pmem_avail,
                                            list->ml_address, list->ml_size);
                                }
                                list = list->ml_next;
                        }
                        /* remove used prefetchable mem resource */
                        list = pci_bus_res[i].pmem_used;
                        while (list) {
                                for (j = 0; j <= pci_bios_maxbus; j++) {
                                        (void) memlist_remove(
                                            &pci_bus_res[j].pmem_avail,
                                            list->ml_address, list->ml_size);
                                        (void) memlist_remove(
                                            &pci_bus_res[j].mem_avail,
                                            list->ml_address, list->ml_size);
                                }
                                list = list->ml_next;
                        }
                }
        }
}

/*
 * Set up (or complete the setup of) the bus_avail resource list
 */
static void
setup_bus_res(int bus)
{
        uchar_t par_bus;

        if (pci_bus_res[bus].dip == NULL)       /* unused bus */
                return;

        /*
         * Set up bus_avail if not already filled in by populate_bus_res()
         */
        if (pci_bus_res[bus].bus_avail == NULL) {
                ASSERT(pci_bus_res[bus].sub_bus >= bus);
                memlist_insert(&pci_bus_res[bus].bus_avail, bus,
                    pci_bus_res[bus].sub_bus - bus + 1);
        }

        ASSERT(pci_bus_res[bus].bus_avail != NULL);

        /*
         * Remove resources from parent bus node if this is not a
         * root bus.
         */
        par_bus = pci_bus_res[bus].par_bus;
        if (par_bus != (uchar_t)-1) {
                ASSERT(pci_bus_res[par_bus].bus_avail != NULL);
                memlist_remove_list(&pci_bus_res[par_bus].bus_avail,
                    pci_bus_res[bus].bus_avail);
        }

        /* remove self from bus_avail */;
        (void) memlist_remove(&pci_bus_res[bus].bus_avail, bus, 1);
}

static uint64_t
get_parbus_io_res(uchar_t parbus, uchar_t bus, uint64_t size, uint64_t align)
{
        uint64_t addr = 0;
        uchar_t res_bus;

        /*
         * Skip root(peer) buses in multiple-root-bus systems when
         * ACPI resource discovery was not successfully done.
         */
        if ((pci_bus_res[parbus].par_bus == (uchar_t)-1) &&
            (num_root_bus > 1) && (acpi_resource_discovery <= 0))
                return (0);

        res_bus = parbus;
        while (pci_bus_res[res_bus].subtractive) {
                if (pci_bus_res[res_bus].io_avail)
                        break;
                res_bus = pci_bus_res[res_bus].par_bus;
                if (res_bus == (uchar_t)-1)
                        break; /* root bus already */
        }

        if (pci_bus_res[res_bus].io_avail) {
                addr = memlist_find(&pci_bus_res[res_bus].io_avail,
                    size, align);
                if (addr) {
                        memlist_insert(&pci_bus_res[res_bus].io_used,
                            addr, size);

                        /* free the old resource */
                        memlist_free_all(&pci_bus_res[bus].io_avail);
                        memlist_free_all(&pci_bus_res[bus].io_used);

                        /* add the new resource */
                        memlist_insert(&pci_bus_res[bus].io_avail, addr, size);
                }
        }

        return (addr);
}

static uint64_t
get_parbus_mem_res(uchar_t parbus, uchar_t bus, uint64_t size, uint64_t align)
{
        uint64_t addr = 0;
        uchar_t res_bus;

        /*
         * Skip root(peer) buses in multiple-root-bus systems when
         * ACPI resource discovery was not successfully done.
         */
        if ((pci_bus_res[parbus].par_bus == (uchar_t)-1) &&
            (num_root_bus > 1) && (acpi_resource_discovery <= 0))
                return (0);

        res_bus = parbus;
        while (pci_bus_res[res_bus].subtractive) {
                if (pci_bus_res[res_bus].mem_avail)
                        break;
                res_bus = pci_bus_res[res_bus].par_bus;
                if (res_bus == (uchar_t)-1)
                        break; /* root bus already */
        }

        if (pci_bus_res[res_bus].mem_avail) {
                addr = memlist_find(&pci_bus_res[res_bus].mem_avail,
                    size, align);
                if (addr) {
                        memlist_insert(&pci_bus_res[res_bus].mem_used,
                            addr, size);
                        (void) memlist_remove(&pci_bus_res[res_bus].pmem_avail,
                            addr, size);

                        /* free the old resource */
                        memlist_free_all(&pci_bus_res[bus].mem_avail);
                        memlist_free_all(&pci_bus_res[bus].mem_used);

                        /* add the new resource */
                        memlist_insert(&pci_bus_res[bus].mem_avail, addr, size);
                }
        }

        return (addr);
}

/*
 * given a cap_id, return its cap_id location in config space
 */
static int
get_pci_cap(uchar_t bus, uchar_t dev, uchar_t func, uint8_t cap_id)
{
        uint8_t curcap, cap_id_loc;
        uint16_t status;
        int location = -1;

        /*
         * Need to check the Status register for ECP support first.
         * Also please note that for type 1 devices, the
         * offset could change. Should support type 1 next.
         */
        status = pci_getw(bus, dev, func, PCI_CONF_STAT);
        if (!(status & PCI_STAT_CAP)) {
                return (-1);
        }
        cap_id_loc = pci_getb(bus, dev, func, PCI_CONF_CAP_PTR);

        /* Walk the list of capabilities */
        while (cap_id_loc && cap_id_loc != (uint8_t)-1) {
                curcap = pci_getb(bus, dev, func, cap_id_loc);

                if (curcap == cap_id) {
                        location = cap_id_loc;
                        break;
                }
                cap_id_loc = pci_getb(bus, dev, func, cap_id_loc + 1);
        }
        return (location);
}

/*
 * Does this resource element live in the legacy VGA range?
 */

int
is_vga(struct memlist *elem, enum io_mem io)
{

        if (io == IO) {
                if ((elem->ml_address == 0x3b0 && elem->ml_size == 0xc) ||
                    (elem->ml_address == 0x3c0 && elem->ml_size == 0x20))
                        return (1);
        } else {
                if (elem->ml_address == 0xa0000 && elem->ml_size == 0x20000)
                        return (1);
        }
        return (0);
}

/*
 * Does this entire resource list consist only of legacy VGA resources?
 */

int
list_is_vga_only(struct memlist *l, enum io_mem io)
{
        do {
                if (!is_vga(l, io))
                        return (0);
        } while ((l = l->ml_next) != NULL);
        return (1);
}

/*
 * Assign valid resources to unconfigured pci(e) bridges. We are trying
 * to reprogram the bridge when its
 *              i)   SECBUS == SUBBUS   ||
 *              ii)  IOBASE > IOLIM     ||
 *              iii) MEMBASE > MEMLIM
 * This must be done after one full pass through the PCI tree to collect
 * all BIOS-configured resources, so that we know what resources are
 * free and available to assign to the unconfigured PPBs.
 */
static void
fix_ppb_res(uchar_t secbus, boolean_t prog_sub)
{
        uchar_t bus, dev, func;
        uchar_t parbus, subbus;
        uint_t io_base, io_limit, mem_base, mem_limit;
        uint_t io_size, mem_size, io_align, mem_align;
        uint64_t addr = 0;
        int *regp = NULL;
        uint_t reglen;
        int rv, cap_ptr, physhi;
        dev_info_t *dip;
        uint16_t cmd_reg;
        struct memlist *list, *scratch_list;

        /* skip root (peer) PCI busses */
        if (pci_bus_res[secbus].par_bus == (uchar_t)-1)
                return;

        /* skip subtractive PPB when prog_sub is not TRUE */
        if (pci_bus_res[secbus].subtractive && !prog_sub)
                return;

        /* some entries may be empty due to discontiguous bus numbering */
        dip = pci_bus_res[secbus].dip;
        if (dip == NULL)
                return;

        rv = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
            "reg", &regp, &reglen);
        if (rv != DDI_PROP_SUCCESS || reglen == 0)
                return;
        physhi = regp[0];
        ddi_prop_free(regp);

        func = (uchar_t)PCI_REG_FUNC_G(physhi);
        dev = (uchar_t)PCI_REG_DEV_G(physhi);
        bus = (uchar_t)PCI_REG_BUS_G(physhi);

        /*
         * If pcie bridge, check to see if link is enabled
         */
        cap_ptr = get_pci_cap(bus, dev, func, PCI_CAP_ID_PCI_E);
        if (cap_ptr != -1) {
                cmd_reg = pci_getw(bus, dev, func,
                    (uint16_t)cap_ptr + PCIE_LINKCTL);
                if (cmd_reg & PCIE_LINKCTL_LINK_DISABLE) {
                        dcmn_err(CE_NOTE,
                            "!fix_ppb_res: ppb[%x/%x/%x] link is disabled.\n",
                            bus, dev, func);
                        return;
                }
        }

        subbus = pci_getb(bus, dev, func, PCI_BCNF_SUBBUS);
        parbus = pci_bus_res[secbus].par_bus;
        ASSERT(parbus == bus);
        cmd_reg = pci_getw(bus, dev, func, PCI_CONF_COMM);

        /*
         * If we have a Cardbus bridge, but no bus space
         */
        if (pci_bus_res[secbus].num_cbb != 0 &&
            pci_bus_res[secbus].bus_avail == NULL) {
                uchar_t range;

                /* normally there are 2 buses under a cardbus bridge */
                range = pci_bus_res[secbus].num_cbb * 2;

                /*
                 * Try to find and allocate a bus-range starting at subbus+1
                 * from the parent of the PPB.
                 */
                for (; range != 0; range--) {
                        if (memlist_find_with_startaddr(
                            &pci_bus_res[parbus].bus_avail,
                            subbus + 1, range, 1) != NULL)
                                break; /* find bus range resource at parent */
                }
                if (range != 0) {
                        memlist_insert(&pci_bus_res[secbus].bus_avail,
                            subbus + 1, range);
                        subbus = subbus + range;
                        pci_bus_res[secbus].sub_bus = subbus;
                        pci_putb(bus, dev, func, PCI_BCNF_SUBBUS, subbus);
                        add_bus_range_prop(secbus);

                        cmn_err(CE_NOTE, "!reprogram bus-range on ppb"
                            "[%x/%x/%x]: %x ~ %x\n", bus, dev, func,
                            secbus, subbus);
                }
        }

        /*
         * Calculate required IO size and alignment
         * If bus io_size is zero, we are going to assign 512 bytes per bus,
         * otherwise, we'll choose the maximum value of such calculation and
         * bus io_size. The size needs to be 4K aligned.
         *
         * We calculate alignment as the largest power of two less than the
         * the sum of all children's IO size requirements, because this will
         * align to the size of the largest child request within that size
         * (which is always a power of two).
         */
        io_size = (subbus - secbus + 1) * 0x200;
        if (io_size <  pci_bus_res[secbus].io_size)
                io_size = pci_bus_res[secbus].io_size;
        io_size = P2ROUNDUP(io_size, PPB_IO_ALIGNMENT);
        io_align = io_size;
        P2LE(io_align);

        /*
         * Calculate required MEM size and alignment
         * If bus mem_size is zero, we are going to assign 1M bytes per bus,
         * otherwise, we'll choose the maximum value of such calculation and
         * bus mem_size. The size needs to be 1M aligned.
         *
         * For the alignment, refer to the I/O comment above.
         */
        mem_size = (subbus - secbus + 1) * PPB_MEM_ALIGNMENT;
        if (mem_size < pci_bus_res[secbus].mem_size) {
                mem_size = pci_bus_res[secbus].mem_size;
                mem_size = P2ROUNDUP(mem_size, PPB_MEM_ALIGNMENT);
        }
        mem_align = mem_size;
        P2LE(mem_align);

        /* Subtractive bridge */
        if (pci_bus_res[secbus].subtractive && prog_sub) {
                /*
                 * We program an arbitrary amount of I/O and memory resource
                 * for the subtractive bridge so that child dynamic-resource-
                 * allocating devices (such as Cardbus bridges) have a chance
                 * of success.  Until we have full-tree resource rebalancing,
                 * dynamic resource allocation (thru busra) only looks at the
                 * parent bridge, so all PPBs must have some allocatable
                 * resource.  For non-subtractive bridges, the resources come
                 * from the base/limit register "windows", but subtractive
                 * bridges often don't program those (since they don't need to).
                 * If we put all the remaining resources on the subtractive
                 * bridge, then peer non-subtractive bridges can't allocate
                 * more space (even though this is probably most correct).
                 * If we put the resources only on the parent, then allocations
                 * from children of subtractive bridges will fail without
                 * special-case code for bypassing the subtractive bridge.
                 * This solution is the middle-ground temporary solution until
                 * we have fully-capable resource allocation.
                 */

                /*
                 * Add an arbitrary I/O resource to the subtractive PPB
                 */
                if (pci_bus_res[secbus].io_avail == NULL) {
                        addr = get_parbus_io_res(parbus, secbus, io_size,
                            io_align);
                        if (addr) {
                                add_ranges_prop(secbus, 1);
                                pci_bus_res[secbus].io_reprogram =
                                    pci_bus_res[parbus].io_reprogram;

                                cmn_err(CE_NOTE, "!add io-range on subtractive"
                                    " ppb[%x/%x/%x]: 0x%x ~ 0x%x\n",
                                    bus, dev, func, (uint32_t)addr,
                                    (uint32_t)addr + io_size - 1);
                        }
                }
                /*
                 * Add an arbitrary memory resource to the subtractive PPB
                 */
                if (pci_bus_res[secbus].mem_avail == NULL) {
                        addr = get_parbus_mem_res(parbus, secbus, mem_size,
                            mem_align);
                        if (addr) {
                                add_ranges_prop(secbus, 1);
                                pci_bus_res[secbus].mem_reprogram =
                                    pci_bus_res[parbus].mem_reprogram;

                                cmn_err(CE_NOTE, "!add mem-range on "
                                    "subtractive ppb[%x/%x/%x]: 0x%x ~ 0x%x\n",
                                    bus, dev, func, (uint32_t)addr,
                                    (uint32_t)addr + mem_size - 1);
                        }
                }

                goto cmd_enable;
        }

        /*
         * Check to see if we need to reprogram I/O space, either because the
         * parent bus needed reprogramming and so do we, or because I/O space is
         * disabled in base/limit or command register.
         */
        io_base = pci_getb(bus, dev, func, PCI_BCNF_IO_BASE_LOW);
        io_limit = pci_getb(bus, dev, func, PCI_BCNF_IO_LIMIT_LOW);
        io_base = (io_base & 0xf0) << 8;
        io_limit = ((io_limit & 0xf0) << 8) | 0xfff;

        /* Form list of all resources passed (avail + used) */
        scratch_list = memlist_dup(pci_bus_res[secbus].io_avail);
        memlist_merge(&pci_bus_res[secbus].io_used, &scratch_list);

        if ((pci_bus_res[parbus].io_reprogram ||
            (io_base > io_limit) ||
            (!(cmd_reg & PCI_COMM_IO))) &&
            !list_is_vga_only(scratch_list, IO)) {
                if (pci_bus_res[secbus].io_used) {
                        memlist_subsume(&pci_bus_res[secbus].io_used,
                            &pci_bus_res[secbus].io_avail);
                }
                if (pci_bus_res[secbus].io_avail &&
                    (!pci_bus_res[parbus].io_reprogram) &&
                    (!pci_bus_res[parbus].subtractive)) {
                        /* rechoose old io ports info */
                        list = pci_bus_res[secbus].io_avail;
                        io_base = 0;
                        do {
                                if (is_vga(list, IO))
                                        continue;
                                if (!io_base) {
                                        io_base = (uint_t)list->ml_address;
                                        io_limit = (uint_t)list->ml_address +
                                            list->ml_size - 1;
                                        io_base =
                                            P2ALIGN(io_base, PPB_IO_ALIGNMENT);
                                } else {
                                        if (list->ml_address + list->ml_size >
                                            io_limit) {
                                                io_limit = (uint_t)
                                                    (list->ml_address +
                                                    list->ml_size - 1);
                                        }
                                }
                        } while ((list = list->ml_next) != NULL);
                        /* 4K aligned */
                        io_limit = P2ROUNDUP(io_limit, PPB_IO_ALIGNMENT) - 1;
                        io_size = io_limit - io_base + 1;
                        ASSERT(io_base <= io_limit);
                        memlist_free_all(&pci_bus_res[secbus].io_avail);
                        memlist_insert(&pci_bus_res[secbus].io_avail,
                            io_base, io_size);
                        memlist_insert(&pci_bus_res[parbus].io_used,
                            io_base, io_size);
                        (void) memlist_remove(&pci_bus_res[parbus].io_avail,
                            io_base, io_size);
                        pci_bus_res[secbus].io_reprogram = B_TRUE;
                } else {
                        /* get new io ports from parent bus */
                        addr = get_parbus_io_res(parbus, secbus, io_size,
                            io_align);
                        if (addr) {
                                io_base = addr;
                                io_limit = addr + io_size - 1;
                                pci_bus_res[secbus].io_reprogram = B_TRUE;
                        }
                }
                if (pci_bus_res[secbus].io_reprogram) {
                        /* reprogram PPB regs */
                        pci_putb(bus, dev, func, PCI_BCNF_IO_BASE_LOW,
                            (uchar_t)((io_base>>8) & 0xf0));
                        pci_putb(bus, dev, func, PCI_BCNF_IO_LIMIT_LOW,
                            (uchar_t)((io_limit>>8) & 0xf0));
                        pci_putb(bus, dev, func, PCI_BCNF_IO_BASE_HI, 0);
                        pci_putb(bus, dev, func, PCI_BCNF_IO_LIMIT_HI, 0);
                        add_ranges_prop(secbus, 1);

                        cmn_err(CE_NOTE, "!reprogram io-range on"
                            " ppb[%x/%x/%x]: 0x%x ~ 0x%x\n",
                            bus, dev, func, io_base, io_limit);
                }
        }
        memlist_free_all(&scratch_list);

        /*
         * Check memory space as we did I/O space.
         */
        mem_base = (uint_t)pci_getw(bus, dev, func, PCI_BCNF_MEM_BASE);
        mem_base = (mem_base & 0xfff0) << 16;
        mem_limit = (uint_t)pci_getw(bus, dev, func, PCI_BCNF_MEM_LIMIT);
        mem_limit = ((mem_limit & 0xfff0) << 16) | 0xfffff;

        scratch_list = memlist_dup(pci_bus_res[secbus].mem_avail);
        memlist_merge(&pci_bus_res[secbus].mem_used, &scratch_list);

        if ((pci_bus_res[parbus].mem_reprogram ||
            (mem_base > mem_limit) ||
            (!(cmd_reg & PCI_COMM_MAE))) &&
            !list_is_vga_only(scratch_list, MEM)) {
                if (pci_bus_res[secbus].mem_used) {
                        memlist_subsume(&pci_bus_res[secbus].mem_used,
                            &pci_bus_res[secbus].mem_avail);
                }
                if (pci_bus_res[secbus].mem_avail &&
                    (!pci_bus_res[parbus].mem_reprogram) &&
                    (!pci_bus_res[parbus].subtractive)) {
                        /* rechoose old mem resource */
                        list = pci_bus_res[secbus].mem_avail;
                        mem_base = 0;
                        do {
                                if (is_vga(list, MEM))
                                        continue;
                                if (mem_base == 0) {
                                        mem_base = (uint_t)list->ml_address;
                                        mem_base = P2ALIGN(mem_base,
                                            PPB_MEM_ALIGNMENT);
                                        mem_limit = (uint_t)(list->ml_address +
                                            list->ml_size - 1);
                                } else {
                                        if ((list->ml_address + list->ml_size) >
                                            mem_limit) {
                                                mem_limit = (uint_t)
                                                    (list->ml_address +
                                                    list->ml_size - 1);
                                        }
                                }
                        } while ((list = list->ml_next) != NULL);
                        mem_limit = P2ROUNDUP(mem_limit, PPB_MEM_ALIGNMENT) - 1;
                        mem_size = mem_limit + 1 - mem_base;
                        ASSERT(mem_base <= mem_limit);
                        memlist_free_all(&pci_bus_res[secbus].mem_avail);
                        memlist_insert(&pci_bus_res[secbus].mem_avail,
                            mem_base, mem_size);
                        memlist_insert(&pci_bus_res[parbus].mem_used,
                            mem_base, mem_size);
                        (void) memlist_remove(&pci_bus_res[parbus].mem_avail,
                            mem_base, mem_size);
                        pci_bus_res[secbus].mem_reprogram = B_TRUE;
                } else {
                        /* get new mem resource from parent bus */
                        addr = get_parbus_mem_res(parbus, secbus, mem_size,
                            mem_align);
                        if (addr) {
                                mem_base = addr;
                                mem_limit = addr + mem_size - 1;
                                pci_bus_res[secbus].mem_reprogram = B_TRUE;
                        }
                }

                if (pci_bus_res[secbus].mem_reprogram) {
                        /* reprogram PPB MEM regs */
                        pci_putw(bus, dev, func, PCI_BCNF_MEM_BASE,
                            (uint16_t)((mem_base>>16) & 0xfff0));
                        pci_putw(bus, dev, func, PCI_BCNF_MEM_LIMIT,
                            (uint16_t)((mem_limit>>16) & 0xfff0));
                        /*
                         * Disable PMEM window by setting base > limit.
                         * We currently don't reprogram the PMEM like we've
                         * done for I/O and MEM. (Devices that support prefetch
                         * can use non-prefetch MEM.) Anyway, if the MEM access
                         * bit is initially disabled by BIOS, we disable the
                         * PMEM window manually by setting PMEM base > PMEM
                         * limit here, in case there are incorrect values in
                         * them from BIOS, so that we won't get in trouble once
                         * the MEM access bit is enabled at the end of this
                         * function.
                         */
                        if (!(cmd_reg & PCI_COMM_MAE)) {
                                pci_putw(bus, dev, func, PCI_BCNF_PF_BASE_LOW,
                                    0xfff0);
                                pci_putw(bus, dev, func, PCI_BCNF_PF_LIMIT_LOW,
                                    0x0);
                                pci_putl(bus, dev, func, PCI_BCNF_PF_BASE_HIGH,
                                    0xffffffff);
                                pci_putl(bus, dev, func, PCI_BCNF_PF_LIMIT_HIGH,
                                    0x0);
                        }

                        add_ranges_prop(secbus, 1);

                        cmn_err(CE_NOTE, "!reprogram mem-range on"
                            " ppb[%x/%x/%x]: 0x%x ~ 0x%x\n",
                            bus, dev, func, mem_base, mem_limit);
                }
        }
        memlist_free_all(&scratch_list);

cmd_enable:
        if (pci_bus_res[secbus].io_avail)
                cmd_reg |= PCI_COMM_IO | PCI_COMM_ME;
        if (pci_bus_res[secbus].mem_avail)
                cmd_reg |= PCI_COMM_MAE | PCI_COMM_ME;
        pci_putw(bus, dev, func, PCI_CONF_COMM, cmd_reg);
}

void
pci_reprogram(void)
{
        int i, pci_reconfig = 1;
        char *onoff;
        int bus;

        /*
         * Scan ACPI namespace for _BBN objects, make sure that
         * childless root-bridges appear in devinfo tree
         */
        pci_scan_bbn();
        pci_unitaddr_cache_init();

        /*
         * Fix-up unit-address assignments if cache is available
         */
        if (pci_unitaddr_cache_valid()) {
                int pci_regs[] = {0, 0, 0};
                int     new_addr;
                int     index = 0;

                for (bus = 0; bus <= pci_bios_maxbus; bus++) {
                        /* skip non-root (peer) PCI busses */
                        if ((pci_bus_res[bus].par_bus != (uchar_t)-1) ||
                            (pci_bus_res[bus].dip == NULL))
                                continue;

                        new_addr = pci_bus_unitaddr(index);
                        if (pci_bus_res[bus].root_addr != new_addr) {
                                /* update reg property for node */
                                pci_regs[0] = pci_bus_res[bus].root_addr =
                                    new_addr;
                                (void) ndi_prop_update_int_array(
                                    DDI_DEV_T_NONE, pci_bus_res[bus].dip,
                                    "reg", (int *)pci_regs, 3);
                        }
                        index++;
                }
        } else {
                /* perform legacy processing */
                pci_renumber_root_busses();
                pci_unitaddr_cache_create();
        }

        /*
         * Do root-bus resource discovery
         */
        for (bus = 0; bus <= pci_bios_maxbus; bus++) {
                /* skip non-root (peer) PCI busses */
                if (pci_bus_res[bus].par_bus != (uchar_t)-1)
                        continue;

                /*
                 * 1. find resources associated with this root bus
                 */
                populate_bus_res(bus);


                /*
                 * 2. Remove used PCI and ISA resources from bus resource map
                 */

                memlist_remove_list(&pci_bus_res[bus].io_avail,
                    pci_bus_res[bus].io_used);
                memlist_remove_list(&pci_bus_res[bus].mem_avail,
                    pci_bus_res[bus].mem_used);
                memlist_remove_list(&pci_bus_res[bus].pmem_avail,
                    pci_bus_res[bus].pmem_used);
                memlist_remove_list(&pci_bus_res[bus].mem_avail,
                    pci_bus_res[bus].pmem_used);
                memlist_remove_list(&pci_bus_res[bus].pmem_avail,
                    pci_bus_res[bus].mem_used);

                memlist_remove_list(&pci_bus_res[bus].io_avail,
                    isa_res.io_used);
                memlist_remove_list(&pci_bus_res[bus].mem_avail,
                    isa_res.mem_used);

                /*
                 * 3. Exclude <1M address range here in case below reserved
                 * ranges for BIOS data area, ROM area etc are wrongly reported
                 * in ACPI resource producer entries for PCI root bus.
                 *      00000000 - 000003FF     RAM
                 *      00000400 - 000004FF     BIOS data area
                 *      00000500 - 0009FFFF     RAM
                 *      000A0000 - 000BFFFF     VGA RAM
                 *      000C0000 - 000FFFFF     ROM area
                 */
                (void) memlist_remove(&pci_bus_res[bus].mem_avail, 0, 0x100000);
                (void) memlist_remove(&pci_bus_res[bus].pmem_avail,
                    0, 0x100000);
        }

        memlist_free_all(&isa_res.io_used);
        memlist_free_all(&isa_res.mem_used);

        /* add bus-range property for root/peer bus nodes */
        for (i = 0; i <= pci_bios_maxbus; i++) {
                /* create bus-range property on root/peer buses */
                if (pci_bus_res[i].par_bus == (uchar_t)-1)
                        add_bus_range_prop(i);

                /* setup bus range resource on each bus */
                setup_bus_res(i);
        }

        if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
            DDI_PROP_DONTPASS, "pci-reprog", &onoff) == DDI_SUCCESS) {
                if (strcmp(onoff, "off") == 0) {
                        pci_reconfig = 0;
                        cmn_err(CE_NOTE, "pci device reprogramming disabled");
                }
                ddi_prop_free(onoff);
        }

        remove_subtractive_res();

        /* reprogram the non-subtractive PPB */
        if (pci_reconfig)
                for (i = 0; i <= pci_bios_maxbus; i++)
                        fix_ppb_res(i, B_FALSE);

        for (i = 0; i <= pci_bios_maxbus; i++) {
                /* configure devices not configured by BIOS */
                if (pci_reconfig) {
                        /*
                         * Reprogram the subtractive PPB. At this time, all its
                         * siblings should have got their resources already.
                         */
                        if (pci_bus_res[i].subtractive)
                                fix_ppb_res(i, B_TRUE);
                        enumerate_bus_devs(i, CONFIG_NEW);
                }
        }

        /* All dev programmed, so we can create available prop */
        for (i = 0; i <= pci_bios_maxbus; i++)
                add_bus_available_prop(i);
}

/*
 * populate bus resources
 */
static void
populate_bus_res(uchar_t bus)
{

        /* scan BIOS structures */
        pci_bus_res[bus].pmem_avail = find_bus_res(bus, PREFETCH_TYPE);
        pci_bus_res[bus].mem_avail = find_bus_res(bus, MEM_TYPE);
        pci_bus_res[bus].io_avail = find_bus_res(bus, IO_TYPE);
        pci_bus_res[bus].bus_avail = find_bus_res(bus, BUSRANGE_TYPE);

        /*
         * attempt to initialize sub_bus from the largest range-end
         * in the bus_avail list
         */
        if (pci_bus_res[bus].bus_avail != NULL) {
                struct memlist *entry;
                int current;

                entry = pci_bus_res[bus].bus_avail;
                while (entry != NULL) {
                        current = entry->ml_address + entry->ml_size - 1;
                        if (current > pci_bus_res[bus].sub_bus)
                                pci_bus_res[bus].sub_bus = current;
                        entry = entry->ml_next;
                }
        }

        if (bus == 0) {
                /*
                 * Special treatment of bus 0:
                 * If no IO/MEM resource from ACPI/MPSPEC/HRT, copy
                 * pcimem from boot and make I/O space the entire range
                 * starting at 0x100.
                 */
                if (pci_bus_res[0].mem_avail == NULL)
                        pci_bus_res[0].mem_avail =
                            memlist_dup(bootops->boot_mem->pcimem);
                /* Exclude 0x00 to 0xff of the I/O space, used by all PCs */
                if (pci_bus_res[0].io_avail == NULL)
                        memlist_insert(&pci_bus_res[0].io_avail, 0x100, 0xffff);
        }

        /*
         * Create 'ranges' property here before any resources are
         * removed from the resource lists
         */
        add_ranges_prop(bus, 0);
}


/*
 * Create top-level bus dips, i.e. /pci@0,0, /pci@1,0...
 */
static void
create_root_bus_dip(uchar_t bus)
{
        int pci_regs[] = {0, 0, 0};
        dev_info_t *dip;

        ASSERT(pci_bus_res[bus].par_bus == (uchar_t)-1);

        num_root_bus++;
        ndi_devi_alloc_sleep(ddi_root_node(), "pci",
            (pnode_t)DEVI_SID_NODEID, &dip);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
            "#address-cells", 3);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
            "#size-cells", 2);
        pci_regs[0] = pci_bus_res[bus].root_addr;
        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, dip,
            "reg", (int *)pci_regs, 3);

        /*
         * If system has PCIe bus, then create different properties
         */
        if (create_pcie_root_bus(bus, dip) == B_FALSE)
                (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip,
                    "device_type", "pci");

        (void) ndi_devi_bind_driver(dip, 0);
        pci_bus_res[bus].dip = dip;
}

/*
 * For any fixed configuration (often compatability) pci devices
 * and those with their own expansion rom, create device nodes
 * to hold the already configured device details.
 */
void
enumerate_bus_devs(uchar_t bus, int config_op)
{
        uchar_t dev, func, nfunc, header;
        ushort_t venid;
        struct pci_devfunc *devlist = NULL, *entry;

        if (config_op == CONFIG_NEW) {
                dcmn_err(CE_NOTE, "configuring pci bus 0x%x", bus);
        } else if (config_op == CONFIG_FIX) {
                dcmn_err(CE_NOTE, "fixing devices on pci bus 0x%x", bus);
        } else
                dcmn_err(CE_NOTE, "enumerating pci bus 0x%x", bus);

        if (config_op == CONFIG_NEW) {
                devlist = (struct pci_devfunc *)pci_bus_res[bus].privdata;
                while (devlist) {
                        entry = devlist;
                        devlist = entry->next;
                        if (entry->reprogram ||
                            pci_bus_res[bus].io_reprogram ||
                            pci_bus_res[bus].mem_reprogram) {
                                /* reprogram device(s) */
                                (void) add_reg_props(entry->dip, bus,
                                    entry->dev, entry->func, CONFIG_NEW, 0);
                        }
                        kmem_free(entry, sizeof (*entry));
                }
                pci_bus_res[bus].privdata = NULL;
                return;
        }

        for (dev = 0; dev < max_dev_pci; dev++) {
                nfunc = 1;
                for (func = 0; func < nfunc; func++) {

                        dcmn_err(CE_NOTE, "probing dev 0x%x, func 0x%x",
                            dev, func);

                        venid = pci_getw(bus, dev, func, PCI_CONF_VENID);

                        if ((venid == 0xffff) || (venid == 0)) {
                                /* no function at this address */
                                continue;
                        }

                        header = pci_getb(bus, dev, func, PCI_CONF_HEADER);
                        if (header == 0xff) {
                                continue; /* illegal value */
                        }

                        /*
                         * according to some mail from Microsoft posted
                         * to the pci-drivers alias, their only requirement
                         * for a multifunction device is for the 1st
                         * function to have to PCI_HEADER_MULTI bit set.
                         */
                        if ((func == 0) && (header & PCI_HEADER_MULTI)) {
                                nfunc = 8;
                        }

                        if (config_op == CONFIG_FIX ||
                            config_op == CONFIG_INFO) {
                                /*
                                 * Create the node, unconditionally, on the
                                 * first pass only.  It may still need
                                 * resource assignment, which will be
                                 * done on the second, CONFIG_NEW, pass.
                                 */
                                process_devfunc(bus, dev, func, header,
                                    venid, config_op);

                        }
                }
        }

        /* percolate bus used resources up through parents to root */
        if (config_op == CONFIG_INFO) {
                int     par_bus;

                par_bus = pci_bus_res[bus].par_bus;
                while (par_bus != (uchar_t)-1) {
                        pci_bus_res[par_bus].io_size +=
                            pci_bus_res[bus].io_size;
                        pci_bus_res[par_bus].mem_size +=
                            pci_bus_res[bus].mem_size;

                        if (pci_bus_res[bus].io_used)
                                memlist_merge(&pci_bus_res[bus].io_used,
                                    &pci_bus_res[par_bus].io_used);

                        if (pci_bus_res[bus].mem_used)
                                memlist_merge(&pci_bus_res[bus].mem_used,
                                    &pci_bus_res[par_bus].mem_used);

                        if (pci_bus_res[bus].pmem_used)
                                memlist_merge(&pci_bus_res[bus].pmem_used,
                                    &pci_bus_res[par_bus].pmem_used);

                        bus = par_bus;
                        par_bus = pci_bus_res[par_bus].par_bus;
                }
        }
}

static int
check_pciide_prop(uchar_t revid, ushort_t venid, ushort_t devid,
    ushort_t subvenid, ushort_t subdevid)
{
        static int prop_exist = -1;
        static char *pciide_str;
        char compat[32];

        if (prop_exist == -1) {
                prop_exist = (ddi_prop_lookup_string(DDI_DEV_T_ANY,
                    ddi_root_node(), DDI_PROP_DONTPASS, "pci-ide",
                    &pciide_str) == DDI_SUCCESS);
        }

        if (!prop_exist)
                return (0);

        /* compare property value against various forms of compatible */
        if (subvenid) {
                (void) snprintf(compat, sizeof (compat), "pci%x,%x.%x.%x.%x",
                    venid, devid, subvenid, subdevid, revid);
                if (strcmp(pciide_str, compat) == 0)
                        return (1);

                (void) snprintf(compat, sizeof (compat), "pci%x,%x.%x.%x",
                    venid, devid, subvenid, subdevid);
                if (strcmp(pciide_str, compat) == 0)
                        return (1);

                (void) snprintf(compat, sizeof (compat), "pci%x,%x",
                    subvenid, subdevid);
                if (strcmp(pciide_str, compat) == 0)
                        return (1);
        }
        (void) snprintf(compat, sizeof (compat), "pci%x,%x.%x",
            venid, devid, revid);
        if (strcmp(pciide_str, compat) == 0)
                return (1);

        (void) snprintf(compat, sizeof (compat), "pci%x,%x", venid, devid);
        if (strcmp(pciide_str, compat) == 0)
                return (1);

        return (0);
}

static int
is_pciide(uchar_t basecl, uchar_t subcl, uchar_t revid,
    ushort_t venid, ushort_t devid, ushort_t subvenid, ushort_t subdevid)
{
        struct ide_table {      /* table for PCI_MASS_OTHER */
                ushort_t venid;
                ushort_t devid;
        } *entry;

        /* XXX SATA and other devices: need a way to add dynamically */
        static struct ide_table ide_other[] = {
                {0x1095, 0x3112},
                {0x1095, 0x3114},
                {0x1095, 0x3512},
                {0x1095, 0x680},        /* Sil0680 */
                {0x1283, 0x8211},       /* ITE 8211F is subcl PCI_MASS_OTHER */
                {0, 0}
        };

        if (basecl != PCI_CLASS_MASS)
                return (0);

        if (subcl == PCI_MASS_IDE) {
                return (1);
        }

        if (check_pciide_prop(revid, venid, devid, subvenid, subdevid))
                return (1);

        if (subcl != PCI_MASS_OTHER && subcl != PCI_MASS_SATA) {
                return (0);
        }

        entry = &ide_other[0];
        while (entry->venid) {
                if (entry->venid == venid && entry->devid == devid)
                        return (1);
                entry++;
        }
        return (0);
}

static int
is_display(uint_t classcode)
{
        static uint_t disp_classes[] = {
                0x000100,
                0x030000,
                0x030001
        };
        int i, nclasses = sizeof (disp_classes) / sizeof (uint_t);

        for (i = 0; i < nclasses; i++) {
                if (classcode == disp_classes[i])
                        return (1);
        }
        return (0);
}

static void
add_undofix_entry(uint8_t bus, uint8_t dev, uint8_t fn,
    void (*undofn)(uint8_t, uint8_t, uint8_t))
{
        struct pci_fixundo *newundo;

        newundo = kmem_alloc(sizeof (struct pci_fixundo), KM_SLEEP);

        /*
         * Adding an item to this list means that we must turn its NMIENABLE
         * bit back on at a later time.
         */
        newundo->bus = bus;
        newundo->dev = dev;
        newundo->fn = fn;
        newundo->undofn = undofn;
        newundo->next = undolist;

        /* add to the undo list in LIFO order */
        undolist = newundo;
}

void
add_pci_fixes(void)
{
        int i;

        for (i = 0; i <= pci_bios_maxbus; i++) {
                /*
                 * For each bus, apply needed fixes to the appropriate devices.
                 * This must be done before the main enumeration loop because
                 * some fixes must be applied to devices normally encountered
                 * later in the pci scan (e.g. if a fix to device 7 must be
                 * applied before scanning device 6, applying fixes in the
                 * normal enumeration loop would obviously be too late).
                 */
                enumerate_bus_devs(i, CONFIG_FIX);
        }
}

void
undo_pci_fixes(void)
{
        struct pci_fixundo *nextundo;
        uint8_t bus, dev, fn;

        /*
         * All fixes in the undo list are performed unconditionally.  Future
         * fixes may require selective undo.
         */
        while (undolist != NULL) {

                bus = undolist->bus;
                dev = undolist->dev;
                fn = undolist->fn;

                (*(undolist->undofn))(bus, dev, fn);

                nextundo = undolist->next;
                kmem_free(undolist, sizeof (struct pci_fixundo));
                undolist = nextundo;
        }
}

static void
undo_amd8111_pci_fix(uint8_t bus, uint8_t dev, uint8_t fn)
{
        uint8_t val8;

        val8 = pci_getb(bus, dev, fn, LPC_IO_CONTROL_REG_1);
        /*
         * The NMIONERR bit is turned back on to allow the SMM BIOS
         * to handle more critical PCI errors (e.g. PERR#).
         */
        val8 |= AMD8111_ENABLENMI;
        pci_putb(bus, dev, fn, LPC_IO_CONTROL_REG_1, val8);
}

static void
pci_fix_amd8111(uint8_t bus, uint8_t dev, uint8_t fn)
{
        uint8_t val8;

        val8 = pci_getb(bus, dev, fn, LPC_IO_CONTROL_REG_1);

        if ((val8 & AMD8111_ENABLENMI) == 0)
                return;

        /*
         * We reset NMIONERR in the LPC because master-abort on the PCI
         * bridge side of the 8111 will cause NMI, which might cause SMI,
         * which sometimes prevents all devices from being enumerated.
         */
        val8 &= ~AMD8111_ENABLENMI;

        pci_putb(bus, dev, fn, LPC_IO_CONTROL_REG_1, val8);

        add_undofix_entry(bus, dev, fn, undo_amd8111_pci_fix);
}

static void
set_devpm_d0(uchar_t bus, uchar_t dev, uchar_t func)
{
        uint16_t status;
        uint8_t header;
        uint8_t cap_ptr;
        uint8_t cap_id;
        uint16_t pmcsr;

        status = pci_getw(bus, dev, func, PCI_CONF_STAT);
        if (!(status & PCI_STAT_CAP))
                return; /* No capabilities list */

        header = pci_getb(bus, dev, func, PCI_CONF_HEADER) & PCI_HEADER_TYPE_M;
        if (header == PCI_HEADER_CARDBUS)
                cap_ptr = pci_getb(bus, dev, func, PCI_CBUS_CAP_PTR);
        else
                cap_ptr = pci_getb(bus, dev, func, PCI_CONF_CAP_PTR);
        /*
         * Walk the capabilities list searching for a PM entry.
         */
        while (cap_ptr != PCI_CAP_NEXT_PTR_NULL && cap_ptr >= PCI_CAP_PTR_OFF) {
                cap_ptr &= PCI_CAP_PTR_MASK;
                cap_id = pci_getb(bus, dev, func, cap_ptr + PCI_CAP_ID);
                if (cap_id == PCI_CAP_ID_PM) {
                        pmcsr = pci_getw(bus, dev, func, cap_ptr + PCI_PMCSR);
                        pmcsr &= ~(PCI_PMCSR_STATE_MASK);
                        pmcsr |= PCI_PMCSR_D0; /* D0 state */
                        pci_putw(bus, dev, func, cap_ptr + PCI_PMCSR, pmcsr);
                        break;
                }
                cap_ptr = pci_getb(bus, dev, func, cap_ptr + PCI_CAP_NEXT_PTR);
        }

}

#define is_isa(bc, sc)  \
        (((bc) == PCI_CLASS_BRIDGE) && ((sc) == PCI_BRIDGE_ISA))

static void
process_devfunc(uchar_t bus, uchar_t dev, uchar_t func, uchar_t header,
    ushort_t vendorid, int config_op)
{
        char nodename[32], unitaddr[5];
        dev_info_t *dip;
        uchar_t basecl, subcl, progcl, intr, revid;
        ushort_t subvenid, subdevid, status;
        ushort_t slot_num;
        uint_t classcode, revclass;
        int reprogram = 0, pciide = 0;
        int power[2] = {1, 1};
        int pciex = 0;
        ushort_t is_pci_bridge = 0;
        struct pci_devfunc *devlist = NULL, *entry = NULL;
        boolean_t slot_valid;
        gfx_entry_t *gfxp;
        pcie_req_id_t bdf;

        ushort_t deviceid = pci_getw(bus, dev, func, PCI_CONF_DEVID);

        switch (header & PCI_HEADER_TYPE_M) {
        case PCI_HEADER_ZERO:
                subvenid = pci_getw(bus, dev, func, PCI_CONF_SUBVENID);
                subdevid = pci_getw(bus, dev, func, PCI_CONF_SUBSYSID);
                break;
        case PCI_HEADER_CARDBUS:
                subvenid = pci_getw(bus, dev, func, PCI_CBUS_SUBVENID);
                subdevid = pci_getw(bus, dev, func, PCI_CBUS_SUBSYSID);
                /* Record the # of cardbus bridges found on the bus */
                if (config_op == CONFIG_INFO)
                        pci_bus_res[bus].num_cbb++;
                break;
        default:
                subvenid = 0;
                subdevid = 0;
                break;
        }

        if (config_op == CONFIG_FIX) {
                if (vendorid == VENID_AMD && deviceid == DEVID_AMD8111_LPC) {
                        pci_fix_amd8111(bus, dev, func);
                }
                return;
        }

        /* XXX should be use generic names? derive from class? */
        revclass = pci_getl(bus, dev, func, PCI_CONF_REVID);
        classcode = revclass >> 8;
        revid = revclass & 0xff;

        /* figure out if this is pci-ide */
        basecl = classcode >> 16;
        subcl = (classcode >> 8) & 0xff;
        progcl = classcode & 0xff;


        if (is_display(classcode))
                (void) snprintf(nodename, sizeof (nodename), "display");
        else if (!pseudo_isa && is_isa(basecl, subcl))
                (void) snprintf(nodename, sizeof (nodename), "isa");
        else if (subvenid != 0)
                (void) snprintf(nodename, sizeof (nodename),
                    "pci%x,%x", subvenid, subdevid);
        else
                (void) snprintf(nodename, sizeof (nodename),
                    "pci%x,%x", vendorid, deviceid);

        /* make sure parent bus dip has been created */
        if (pci_bus_res[bus].dip == NULL)
                create_root_bus_dip(bus);

        ndi_devi_alloc_sleep(pci_bus_res[bus].dip, nodename,
            DEVI_SID_NODEID, &dip);

        if (check_if_device_is_pciex(dip, bus, dev, func, &slot_valid,
            &slot_num, &is_pci_bridge) == B_TRUE)
                pciex = 1;

        bdf = PCI_GETBDF(bus, dev, func);
        /*
         * Record BAD AMD bridges which don't support MMIO config access.
         */
        if (IS_BAD_AMD_NTBRIDGE(vendorid, deviceid) ||
            IS_AMD_8132_CHIP(vendorid, deviceid)) {
                uchar_t secbus = 0;
                uchar_t subbus = 0;

                if ((basecl == PCI_CLASS_BRIDGE) &&
                    (subcl == PCI_BRIDGE_PCI)) {
                        secbus = pci_getb(bus, dev, func, PCI_BCNF_SECBUS);
                        subbus = pci_getb(bus, dev, func, PCI_BCNF_SUBBUS);
                }
                pci_cfgacc_add_workaround(bdf, secbus, subbus);
        }

        /*
         * Only populate bus_t if this device is sitting under a PCIE root
         * complex.  Some particular machines have both a PCIE root complex and
         * a PCI hostbridge, in which case only devices under the PCIE root
         * complex will have their bus_t populated.
         */
        if (pcie_get_rc_dip(dip) != NULL) {
                ck804_fix_aer_ptr(dip, bdf);
                (void) pcie_init_bus(dip, bdf, PCIE_BUS_INITIAL);
        }

        /* add properties */
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip, "device-id", deviceid);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip, "vendor-id", vendorid);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip, "revision-id", revid);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
            "class-code", classcode);
        if (func == 0)
                (void) snprintf(unitaddr, sizeof (unitaddr), "%x", dev);
        else
                (void) snprintf(unitaddr, sizeof (unitaddr),
                    "%x,%x", dev, func);
        (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip,
            "unit-address", unitaddr);

        /* add device_type for display nodes */
        if (is_display(classcode)) {
                (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip,
                    "device_type", "display");
        }
        /* add special stuff for header type */
        if ((header & PCI_HEADER_TYPE_M) == PCI_HEADER_ZERO) {
                uchar_t mingrant = pci_getb(bus, dev, func, PCI_CONF_MIN_G);
                uchar_t maxlatency = pci_getb(bus, dev, func, PCI_CONF_MAX_L);

                if (subvenid != 0) {
                        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                            "subsystem-id", subdevid);
                        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                            "subsystem-vendor-id", subvenid);
                }
                if (!pciex)
                        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                            "min-grant", mingrant);
                if (!pciex)
                        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                            "max-latency", maxlatency);
        }

        /* interrupt, record if not 0 */
        intr = pci_getb(bus, dev, func, PCI_CONF_IPIN);
        if (intr != 0)
                (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                    "interrupts", intr);

        /*
         * Add support for 133 mhz pci eventually
         */
        status = pci_getw(bus, dev, func, PCI_CONF_STAT);

        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
            "devsel-speed", (status & PCI_STAT_DEVSELT) >> 9);
        if (!pciex && (status & PCI_STAT_FBBC))
                (void) ndi_prop_create_boolean(DDI_DEV_T_NONE, dip,
                    "fast-back-to-back");
        if (!pciex && (status & PCI_STAT_66MHZ))
                (void) ndi_prop_create_boolean(DDI_DEV_T_NONE, dip,
                    "66mhz-capable");
        if (status & PCI_STAT_UDF)
                (void) ndi_prop_create_boolean(DDI_DEV_T_NONE, dip,
                    "udf-supported");
        if (pciex && slot_valid) {
                (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                    "physical-slot#", slot_num);
                if (!is_pci_bridge)
                        pciex_slot_names_prop(dip, slot_num);
        }

        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, dip,
            "power-consumption", power, 2);

        /* Set the device PM state to D0 */
        set_devpm_d0(bus, dev, func);

        if ((basecl == PCI_CLASS_BRIDGE) && (subcl == PCI_BRIDGE_PCI))
                add_ppb_props(dip, bus, dev, func, pciex, is_pci_bridge);
        else {
                /*
                 * Record the non-PPB devices on the bus for possible
                 * reprogramming at 2nd bus enumeration.
                 * Note: PPB reprogramming is done in fix_ppb_res()
                 */
                devlist = (struct pci_devfunc *)pci_bus_res[bus].privdata;
                entry = kmem_zalloc(sizeof (*entry), KM_SLEEP);
                entry->dip = dip;
                entry->dev = dev;
                entry->func = func;
                entry->next = devlist;
                pci_bus_res[bus].privdata = entry;
        }

        if (IS_CLASS_IOAPIC(basecl, subcl, progcl)) {
                create_ioapic_node(bus, dev, func, vendorid, deviceid);
        }

        /* check for NVIDIA CK8-04/MCP55 based LPC bridge */
        if (NVIDIA_IS_LPC_BRIDGE(vendorid, deviceid) && (dev == 1) &&
            (func == 0)) {
                add_nvidia_isa_bridge_props(dip, bus, dev, func);
                /* each LPC bridge has an integrated IOAPIC */
                apic_nvidia_io_max++;
        }

        if (pciex && is_pci_bridge)
                (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip, "model",
                    (char *)"PCIe-PCI bridge");
        else
                add_model_prop(dip, classcode);

        add_compatible(dip, subvenid, subdevid, vendorid, deviceid,
            revid, classcode, pciex);

        /*
         * See if this device is a controller that advertises
         * itself to be a standard ATA task file controller, or one that
         * has been hard coded.
         *
         * If it is, check if any other higher precedence driver listed in
         * driver_aliases will claim the node by calling
         * ddi_compatibile_driver_major.  If so, clear pciide and do not
         * create a pci-ide node or any other special handling.
         *
         * If another driver does not bind, set the node name to pci-ide
         * and then let the special pci-ide handling for registers and
         * child pci-ide nodes proceed below.
         */
        if (is_pciide(basecl, subcl, revid, vendorid, deviceid,
            subvenid, subdevid) == 1) {
                if (ddi_compatible_driver_major(dip, NULL) == (major_t)-1) {
                        (void) ndi_devi_set_nodename(dip, "pci-ide", 0);
                        pciide = 1;
                }
        }

        DEVI_SET_PCI(dip);
        reprogram = add_reg_props(dip, bus, dev, func, config_op, pciide);
        (void) ndi_devi_bind_driver(dip, 0);

        /* special handling for pci-ide */
        if (pciide) {
                dev_info_t *cdip;

                /*
                 * Create properties specified by P1275 Working Group
                 * Proposal #414 Version 1
                 */
                (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip,
                    "device_type", "pci-ide");
                (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                    "#address-cells", 1);
                (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
                    "#size-cells", 0);

                /* allocate two child nodes */
                ndi_devi_alloc_sleep(dip, "ide",
                    (pnode_t)DEVI_SID_NODEID, &cdip);
                (void) ndi_prop_update_int(DDI_DEV_T_NONE, cdip,
                    "reg", 0);
                (void) ndi_devi_bind_driver(cdip, 0);
                ndi_devi_alloc_sleep(dip, "ide",
                    (pnode_t)DEVI_SID_NODEID, &cdip);
                (void) ndi_prop_update_int(DDI_DEV_T_NONE, cdip,
                    "reg", 1);
                (void) ndi_devi_bind_driver(cdip, 0);

                reprogram = 0;  /* don't reprogram pci-ide bridge */
        }

        if (is_display(classcode)) {
                gfxp = kmem_zalloc(sizeof (*gfxp), KM_SLEEP);
                gfxp->g_dip = dip;
                gfxp->g_prev = NULL;
                gfxp->g_next = gfx_devinfo_list;
                gfx_devinfo_list = gfxp;
                if (gfxp->g_next)
                        gfxp->g_next->g_prev = gfxp;
        }

        /* special handling for isa */
        if (!pseudo_isa && is_isa(basecl, subcl)) {
                /* add device_type */
                (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip,
                    "device_type", "isa");
        }

        if (reprogram && (entry != NULL))
                entry->reprogram = B_TRUE;

}

/*
 * Some vendors do not use unique subsystem IDs in their products, which
 * makes the use of form 2 compatible names (pciSSSS,ssss) inappropriate.
 * Allow for these compatible forms to be excluded on a per-device basis.
 */
/*ARGSUSED*/
static boolean_t
subsys_compat_exclude(ushort_t venid, ushort_t devid, ushort_t subvenid,
    ushort_t subdevid, uchar_t revid, uint_t classcode)
{
        /* Nvidia display adapters */
        if ((venid == 0x10de) && (is_display(classcode)))
                return (B_TRUE);

        return (B_FALSE);
}

/*
 * Set the compatible property to a value compliant with
 * rev 2.1 of the IEEE1275 PCI binding.
 * (Also used for PCI-Express devices).
 *
 *   pciVVVV,DDDD.SSSS.ssss.RR  (0)
 *   pciVVVV,DDDD.SSSS.ssss     (1)
 *   pciSSSS,ssss               (2)
 *   pciVVVV,DDDD.RR            (3)
 *   pciVVVV,DDDD               (4)
 *   pciclass,CCSSPP            (5)
 *   pciclass,CCSS              (6)
 *
 * The Subsystem (SSSS) forms are not inserted if
 * subsystem-vendor-id is 0.
 *
 * NOTE: For PCI-Express devices "pci" is replaced with "pciex" in 0-6 above
 * property 2 is not created as per "1275 bindings for PCI Express Interconnect"
 *
 * Set with setprop and \x00 between each
 * to generate the encoded string array form.
 */
void
add_compatible(dev_info_t *dip, ushort_t subvenid, ushort_t subdevid,
    ushort_t vendorid, ushort_t deviceid, uchar_t revid, uint_t classcode,
    int pciex)
{
        int i = 0;
        int size = COMPAT_BUFSIZE;
        char *compat[13];
        char *buf, *curr;

        curr = buf = kmem_alloc(size, KM_SLEEP);

        if (pciex) {
                if (subvenid) {
                        compat[i++] = curr;     /* form 0 */
                        (void) snprintf(curr, size, "pciex%x,%x.%x.%x.%x",
                            vendorid, deviceid, subvenid, subdevid, revid);
                        size -= strlen(curr) + 1;
                        curr += strlen(curr) + 1;

                        compat[i++] = curr;     /* form 1 */
                        (void) snprintf(curr, size, "pciex%x,%x.%x.%x",
                            vendorid, deviceid, subvenid, subdevid);
                        size -= strlen(curr) + 1;
                        curr += strlen(curr) + 1;

                }
                compat[i++] = curr;     /* form 3 */
                (void) snprintf(curr, size, "pciex%x,%x.%x",
                    vendorid, deviceid, revid);
                size -= strlen(curr) + 1;
                curr += strlen(curr) + 1;

                compat[i++] = curr;     /* form 4 */
                (void) snprintf(curr, size, "pciex%x,%x", vendorid, deviceid);
                size -= strlen(curr) + 1;
                curr += strlen(curr) + 1;

                compat[i++] = curr;     /* form 5 */
                (void) snprintf(curr, size, "pciexclass,%06x", classcode);
                size -= strlen(curr) + 1;
                curr += strlen(curr) + 1;

                compat[i++] = curr;     /* form 6 */
                (void) snprintf(curr, size, "pciexclass,%04x",
                    (classcode >> 8));
                size -= strlen(curr) + 1;
                curr += strlen(curr) + 1;
        }

        if (subvenid) {
                compat[i++] = curr;     /* form 0 */
                (void) snprintf(curr, size, "pci%x,%x.%x.%x.%x",
                    vendorid, deviceid, subvenid, subdevid, revid);
                size -= strlen(curr) + 1;
                curr += strlen(curr) + 1;

                compat[i++] = curr;     /* form 1 */
                (void) snprintf(curr, size, "pci%x,%x.%x.%x",
                    vendorid, deviceid, subvenid, subdevid);
                size -= strlen(curr) + 1;
                curr += strlen(curr) + 1;

                if (subsys_compat_exclude(vendorid, deviceid, subvenid,
                    subdevid, revid, classcode) == B_FALSE) {
                        compat[i++] = curr;     /* form 2 */
                        (void) snprintf(curr, size, "pci%x,%x", subvenid,
                            subdevid);
                        size -= strlen(curr) + 1;
                        curr += strlen(curr) + 1;
                }
        }
        compat[i++] = curr;     /* form 3 */
        (void) snprintf(curr, size, "pci%x,%x.%x", vendorid, deviceid, revid);
        size -= strlen(curr) + 1;
        curr += strlen(curr) + 1;

        compat[i++] = curr;     /* form 4 */
        (void) snprintf(curr, size, "pci%x,%x", vendorid, deviceid);
        size -= strlen(curr) + 1;
        curr += strlen(curr) + 1;

        compat[i++] = curr;     /* form 5 */
        (void) snprintf(curr, size, "pciclass,%06x", classcode);
        size -= strlen(curr) + 1;
        curr += strlen(curr) + 1;

        compat[i++] = curr;     /* form 6 */
        (void) snprintf(curr, size, "pciclass,%04x", (classcode >> 8));
        size -= strlen(curr) + 1;
        curr += strlen(curr) + 1;

        (void) ndi_prop_update_string_array(DDI_DEV_T_NONE, dip,
            "compatible", compat, i);
        kmem_free(buf, COMPAT_BUFSIZE);
}

/*
 * Adjust the reg properties for a dual channel PCI-IDE device.
 *
 * NOTE: don't do anything that changes the order of the hard-decodes
 * and programmed BARs. The kernel driver depends on these values
 * being in this order regardless of whether they're for a 'native'
 * mode BAR or not.
 */
/*
 * config info for pci-ide devices
 */
static struct {
        uchar_t  native_mask;   /* 0 == 'compatibility' mode, 1 == native */
        uchar_t  bar_offset;    /* offset for alt status register */
        ushort_t addr;          /* compatibility mode base address */
        ushort_t length;        /* number of ports for this BAR */
} pciide_bar[] = {
        { 0x01, 0, 0x1f0, 8 },  /* primary lower BAR */
        { 0x01, 2, 0x3f6, 1 },  /* primary upper BAR */
        { 0x04, 0, 0x170, 8 },  /* secondary lower BAR */
        { 0x04, 2, 0x376, 1 }   /* secondary upper BAR */
};

static int
pciIdeAdjustBAR(uchar_t progcl, int index, uint_t *basep, uint_t *lenp)
{
        int hard_decode = 0;

        /*
         * Adjust the base and len for the BARs of the PCI-IDE
         * device's primary and secondary controllers. The first
         * two BARs are for the primary controller and the next
         * two BARs are for the secondary controller. The fifth
         * and sixth bars are never adjusted.
         */
        if (index >= 0 && index <= 3) {
                *lenp = pciide_bar[index].length;

                if (progcl & pciide_bar[index].native_mask) {
                        *basep += pciide_bar[index].bar_offset;
                } else {
                        *basep = pciide_bar[index].addr;
                        hard_decode = 1;
                }
        }

        /*
         * if either base or len is zero make certain both are zero
         */
        if (*basep == 0 || *lenp == 0) {
                *basep = 0;
                *lenp = 0;
                hard_decode = 0;
        }

        return (hard_decode);
}


/*
 * Add the "reg" and "assigned-addresses" property
 */
static int
add_reg_props(dev_info_t *dip, uchar_t bus, uchar_t dev, uchar_t func,
    int config_op, int pciide)
{
        uchar_t baseclass, subclass, progclass, header;
        ushort_t bar_sz;
        uint_t value = 0, len, devloc;
        uint_t base, base_hi, type;
        ushort_t offset, end;
        int max_basereg, j, reprogram = 0;
        uint_t phys_hi;
        struct memlist **io_avail, **io_used;
        struct memlist **mem_avail, **mem_used;
        struct memlist **pmem_avail, **pmem_used;
        uchar_t res_bus;

        pci_regspec_t regs[16] = {{0}};
        pci_regspec_t assigned[15] = {{0}};
        int nreg, nasgn;

        io_avail = &pci_bus_res[bus].io_avail;
        io_used = &pci_bus_res[bus].io_used;
        mem_avail = &pci_bus_res[bus].mem_avail;
        mem_used = &pci_bus_res[bus].mem_used;
        pmem_avail = &pci_bus_res[bus].pmem_avail;
        pmem_used = &pci_bus_res[bus].pmem_used;

        devloc = (uint_t)bus << 16 | (uint_t)dev << 11 | (uint_t)func << 8;
        regs[0].pci_phys_hi = devloc;
        nreg = 1;       /* rest of regs[0] is all zero */
        nasgn = 0;

        baseclass = pci_getb(bus, dev, func, PCI_CONF_BASCLASS);
        subclass = pci_getb(bus, dev, func, PCI_CONF_SUBCLASS);
        progclass = pci_getb(bus, dev, func, PCI_CONF_PROGCLASS);
        header = pci_getb(bus, dev, func, PCI_CONF_HEADER) & PCI_HEADER_TYPE_M;

        switch (header) {
        case PCI_HEADER_ZERO:
                max_basereg = PCI_BASE_NUM;
                break;
        case PCI_HEADER_PPB:
                max_basereg = PCI_BCNF_BASE_NUM;
                break;
        case PCI_HEADER_CARDBUS:
                max_basereg = PCI_CBUS_BASE_NUM;
                reprogram = 1;
                break;
        default:
                max_basereg = 0;
                break;
        }

        /*
         * Create the register property by saving the current
         * value of the base register. Write 0xffffffff to the
         * base register.  Read the value back to determine the
         * required size of the address space.  Restore the base
         * register contents.
         *
         * Do not disable I/O and memory access for bridges; this
         * has the side-effect of making the bridge transparent to
         * secondary-bus activity (see sections 4.1-4.3 of the
         * PCI-PCI Bridge Spec V1.2).  For non-bridges, disable
         * I/O and memory access to avoid difficulty with USB
         * emulation (see OHCI spec1.0a appendix B
         * "Host Controller Mapping")
         */
        end = PCI_CONF_BASE0 + max_basereg * sizeof (uint_t);
        for (j = 0, offset = PCI_CONF_BASE0; offset < end;
            j++, offset += bar_sz) {
                uint_t  command;

                /* determine the size of the address space */
                base = pci_getl(bus, dev, func, offset);
                if (baseclass != PCI_CLASS_BRIDGE) {
                        command = (uint_t)pci_getw(bus, dev, func,
                            PCI_CONF_COMM);
                        pci_putw(bus, dev, func, PCI_CONF_COMM,
                            command & ~(PCI_COMM_MAE | PCI_COMM_IO));
                }
                pci_putl(bus, dev, func, offset, 0xffffffff);
                value = pci_getl(bus, dev, func, offset);
                pci_putl(bus, dev, func, offset, base);
                if (baseclass != PCI_CLASS_BRIDGE)
                        pci_putw(bus, dev, func, PCI_CONF_COMM, command);

                /* construct phys hi,med.lo, size hi, lo */
                if ((pciide && j < 4) || (base & PCI_BASE_SPACE_IO)) {
                        int hard_decode = 0;

                        /* i/o space */
                        bar_sz = PCI_BAR_SZ_32;
                        value &= PCI_BASE_IO_ADDR_M;
                        len = ((value ^ (value-1)) + 1) >> 1;

                        /* XXX Adjust first 4 IDE registers */
                        if (pciide) {
                                if (subclass != PCI_MASS_IDE)
                                        progclass = (PCI_IDE_IF_NATIVE_PRI |
                                            PCI_IDE_IF_NATIVE_SEC);
                                hard_decode = pciIdeAdjustBAR(progclass, j,
                                    &base, &len);
                        } else if (value == 0) {
                                /* skip base regs with size of 0 */
                                continue;
                        }

                        regs[nreg].pci_phys_hi = PCI_ADDR_IO | devloc |
                            (hard_decode ? PCI_RELOCAT_B : offset);
                        regs[nreg].pci_phys_low = hard_decode ?
                            base & PCI_BASE_IO_ADDR_M : 0;
                        assigned[nasgn].pci_phys_hi =
                            PCI_RELOCAT_B | regs[nreg].pci_phys_hi;
                        regs[nreg].pci_size_low =
                            assigned[nasgn].pci_size_low = len;
                        type = base & (~PCI_BASE_IO_ADDR_M);
                        base &= PCI_BASE_IO_ADDR_M;
                        /*
                         * A device under a subtractive PPB can allocate
                         * resources from its parent bus if there is no resource
                         * available on its own bus.
                         */
                        if ((config_op == CONFIG_NEW) && (*io_avail == NULL)) {
                                res_bus = bus;
                                while (pci_bus_res[res_bus].subtractive) {
                                        res_bus = pci_bus_res[res_bus].par_bus;
                                        if (res_bus == (uchar_t)-1)
                                                break; /* root bus already */
                                        if (pci_bus_res[res_bus].io_avail) {
                                                io_avail = &pci_bus_res
                                                    [res_bus].io_avail;
                                                break;
                                        }
                                }
                        }

                        /*
                         * first pass - gather what's there
                         * update/second pass - adjust/allocate regions
                         *      config - allocate regions
                         */
                        if (config_op == CONFIG_INFO) { /* first pass */
                                /* take out of the resource map of the bus */
                                if (base != 0) {
                                        (void) memlist_remove(io_avail, base,
                                            len);
                                        memlist_insert(io_used, base, len);
                                } else {
                                        reprogram = 1;
                                }
                                pci_bus_res[bus].io_size += len;
                        } else if ((*io_avail && base == 0) ||
                            pci_bus_res[bus].io_reprogram) {
                                base = (uint_t)memlist_find(io_avail, len, len);
                                if (base != 0) {
                                        memlist_insert(io_used, base, len);
                                        /* XXX need to worry about 64-bit? */
                                        pci_putl(bus, dev, func, offset,
                                            base | type);
                                        base = pci_getl(bus, dev, func, offset);
                                        base &= PCI_BASE_IO_ADDR_M;
                                }
                                if (base == 0) {
                                        cmn_err(CE_WARN, "failed to program"
                                            " IO space [%d/%d/%d] BAR@0x%x"
                                            " length 0x%x",
                                            bus, dev, func, offset, len);
                                }
                        }
                        assigned[nasgn].pci_phys_low = base;
                        nreg++, nasgn++;

                } else {
                        /* memory space */
                        if ((base & PCI_BASE_TYPE_M) == PCI_BASE_TYPE_ALL) {
                                bar_sz = PCI_BAR_SZ_64;
                                base_hi = pci_getl(bus, dev, func, offset + 4);
                                phys_hi = PCI_ADDR_MEM64;
                        } else {
                                bar_sz = PCI_BAR_SZ_32;
                                base_hi = 0;
                                phys_hi = PCI_ADDR_MEM32;
                        }

                        /* skip base regs with size of 0 */
                        value &= PCI_BASE_M_ADDR_M;

                        if (value == 0)
                                continue;

                        len = ((value ^ (value-1)) + 1) >> 1;
                        regs[nreg].pci_size_low =
                            assigned[nasgn].pci_size_low = len;

                        phys_hi |= (devloc | offset);
                        if (base & PCI_BASE_PREF_M)
                                phys_hi |= PCI_PREFETCH_B;

                        /*
                         * A device under a subtractive PPB can allocate
                         * resources from its parent bus if there is no resource
                         * available on its own bus.
                         */
                        if ((config_op == CONFIG_NEW) && (*mem_avail == NULL)) {
                                res_bus = bus;
                                while (pci_bus_res[res_bus].subtractive) {
                                        res_bus = pci_bus_res[res_bus].par_bus;
                                        if (res_bus == (uchar_t)-1)
                                                break; /* root bus already */
                                        mem_avail =
                                            &pci_bus_res[res_bus].mem_avail;
                                        pmem_avail =
                                            &pci_bus_res [res_bus].pmem_avail;
                                        /*
                                         * Break out as long as at least
                                         * mem_avail is available
                                         */
                                        if ((*pmem_avail &&
                                            (phys_hi & PCI_PREFETCH_B)) ||
                                            *mem_avail)
                                                break;
                                }
                        }

                        regs[nreg].pci_phys_hi =
                            assigned[nasgn].pci_phys_hi = phys_hi;
                        assigned[nasgn].pci_phys_hi |= PCI_RELOCAT_B;
                        assigned[nasgn].pci_phys_mid = base_hi;
                        type = base & ~PCI_BASE_M_ADDR_M;
                        base &= PCI_BASE_M_ADDR_M;

                        if (config_op == CONFIG_INFO) {
                                /* take out of the resource map of the bus */
                                if (base != NULL) {
                                        /* remove from PMEM and MEM space */
                                        (void) memlist_remove(mem_avail,
                                            base, len);
                                        (void) memlist_remove(pmem_avail,
                                            base, len);
                                        /* only note as used in correct map */
                                        if (phys_hi & PCI_PREFETCH_B)
                                                memlist_insert(pmem_used,
                                                    base, len);
                                        else
                                                memlist_insert(mem_used,
                                                    base, len);
                                } else {
                                        reprogram = 1;
                                }
                                pci_bus_res[bus].mem_size += len;
                        } else if ((*mem_avail && base == NULL) ||
                            pci_bus_res[bus].mem_reprogram) {
                                /*
                                 * When desired, attempt a prefetchable
                                 * allocation first
                                 */
                                if (phys_hi & PCI_PREFETCH_B) {
                                        base = (uint_t)memlist_find(pmem_avail,
                                            len, len);
                                        if (base != NULL) {
                                                memlist_insert(pmem_used,
                                                    base, len);
                                                (void) memlist_remove(mem_avail,
                                                    base, len);
                                        }
                                }
                                /*
                                 * If prefetchable allocation was not
                                 * desired, or failed, attempt ordinary
                                 * memory allocation
                                 */
                                if (base == NULL) {
                                        base = (uint_t)memlist_find(mem_avail,
                                            len, len);
                                        if (base != NULL) {
                                                memlist_insert(mem_used,
                                                    base, len);
                                                (void) memlist_remove(
                                                    pmem_avail, base, len);
                                        }
                                }
                                if (base != NULL) {
                                        pci_putl(bus, dev, func, offset,
                                            base | type);
                                        base = pci_getl(bus, dev, func, offset);
                                        base &= PCI_BASE_M_ADDR_M;
                                } else
                                        cmn_err(CE_WARN, "failed to program "
                                            "mem space [%d/%d/%d] BAR@0x%x"
                                            " length 0x%x",
                                            bus, dev, func, offset, len);
                        }
                        assigned[nasgn].pci_phys_low = base;
                        nreg++, nasgn++;
                }
        }
        switch (header) {
        case PCI_HEADER_ZERO:
                offset = PCI_CONF_ROM;
                break;
        case PCI_HEADER_PPB:
                offset = PCI_BCNF_ROM;
                break;
        default: /* including PCI_HEADER_CARDBUS */
                goto done;
        }

        /*
         * Add the expansion rom memory space
         * Determine the size of the ROM base reg; don't write reserved bits
         * ROM isn't in the PCI memory space.
         */
        base = pci_getl(bus, dev, func, offset);
        pci_putl(bus, dev, func, offset, PCI_BASE_ROM_ADDR_M);
        value = pci_getl(bus, dev, func, offset);
        pci_putl(bus, dev, func, offset, base);
        if (value & PCI_BASE_ROM_ENABLE)
                value &= PCI_BASE_ROM_ADDR_M;
        else
                value = 0;

        if (value != 0) {
                regs[nreg].pci_phys_hi = (PCI_ADDR_MEM32 | devloc) + offset;
                assigned[nasgn].pci_phys_hi = (PCI_RELOCAT_B |
                    PCI_ADDR_MEM32 | devloc) + offset;
                base &= PCI_BASE_ROM_ADDR_M;
                assigned[nasgn].pci_phys_low = base;
                len = ((value ^ (value-1)) + 1) >> 1;
                regs[nreg].pci_size_low = assigned[nasgn].pci_size_low = len;
                nreg++, nasgn++;
                /* take it out of the memory resource */
                if (base != NULL) {
                        (void) memlist_remove(mem_avail, base, len);
                        memlist_insert(mem_used, base, len);
                        pci_bus_res[bus].mem_size += len;
                }
        }

        /*
         * Account for "legacy" (alias) video adapter resources
         */

        /* add the three hard-decode, aliased address spaces for VGA */
        if ((baseclass == PCI_CLASS_DISPLAY && subclass == PCI_DISPLAY_VGA) ||
            (baseclass == PCI_CLASS_NONE && subclass == PCI_NONE_VGA)) {

                /* VGA hard decode 0x3b0-0x3bb */
                regs[nreg].pci_phys_hi = assigned[nasgn].pci_phys_hi =
                    (PCI_RELOCAT_B | PCI_ALIAS_B | PCI_ADDR_IO | devloc);
                regs[nreg].pci_phys_low = assigned[nasgn].pci_phys_low = 0x3b0;
                regs[nreg].pci_size_low = assigned[nasgn].pci_size_low = 0xc;
                nreg++, nasgn++;
                (void) memlist_remove(io_avail, 0x3b0, 0xc);
                memlist_insert(io_used, 0x3b0, 0xc);
                pci_bus_res[bus].io_size += 0xc;

                /* VGA hard decode 0x3c0-0x3df */
                regs[nreg].pci_phys_hi = assigned[nasgn].pci_phys_hi =
                    (PCI_RELOCAT_B | PCI_ALIAS_B | PCI_ADDR_IO | devloc);
                regs[nreg].pci_phys_low = assigned[nasgn].pci_phys_low = 0x3c0;
                regs[nreg].pci_size_low = assigned[nasgn].pci_size_low = 0x20;
                nreg++, nasgn++;
                (void) memlist_remove(io_avail, 0x3c0, 0x20);
                memlist_insert(io_used, 0x3c0, 0x20);
                pci_bus_res[bus].io_size += 0x20;

                /* Video memory */
                regs[nreg].pci_phys_hi = assigned[nasgn].pci_phys_hi =
                    (PCI_RELOCAT_B | PCI_ALIAS_B | PCI_ADDR_MEM32 | devloc);
                regs[nreg].pci_phys_low =
                    assigned[nasgn].pci_phys_low = 0xa0000;
                regs[nreg].pci_size_low =
                    assigned[nasgn].pci_size_low = 0x20000;
                nreg++, nasgn++;
                /* remove from MEM and PMEM space */
                (void) memlist_remove(mem_avail, 0xa0000, 0x20000);
                (void) memlist_remove(pmem_avail, 0xa0000, 0x20000);
                memlist_insert(mem_used, 0xa0000, 0x20000);
                pci_bus_res[bus].mem_size += 0x20000;
        }

        /* add the hard-decode, aliased address spaces for 8514 */
        if ((baseclass == PCI_CLASS_DISPLAY) &&
            (subclass == PCI_DISPLAY_VGA) &&
            (progclass & PCI_DISPLAY_IF_8514)) {

                /* hard decode 0x2e8 */
                regs[nreg].pci_phys_hi = assigned[nasgn].pci_phys_hi =
                    (PCI_RELOCAT_B | PCI_ALIAS_B | PCI_ADDR_IO | devloc);
                regs[nreg].pci_phys_low = assigned[nasgn].pci_phys_low = 0x2e8;
                regs[nreg].pci_size_low = assigned[nasgn].pci_size_low = 0x1;
                nreg++, nasgn++;
                (void) memlist_remove(io_avail, 0x2e8, 0x1);
                memlist_insert(io_used, 0x2e8, 0x1);
                pci_bus_res[bus].io_size += 0x1;

                /* hard decode 0x2ea-0x2ef */
                regs[nreg].pci_phys_hi = assigned[nasgn].pci_phys_hi =
                    (PCI_RELOCAT_B | PCI_ALIAS_B | PCI_ADDR_IO | devloc);
                regs[nreg].pci_phys_low = assigned[nasgn].pci_phys_low = 0x2ea;
                regs[nreg].pci_size_low = assigned[nasgn].pci_size_low = 0x6;
                nreg++, nasgn++;
                (void) memlist_remove(io_avail, 0x2ea, 0x6);
                memlist_insert(io_used, 0x2ea, 0x6);
                pci_bus_res[bus].io_size += 0x6;
        }

done:
        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, dip, "reg",
            (int *)regs, nreg * sizeof (pci_regspec_t) / sizeof (int));
        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, dip,
            "assigned-addresses",
            (int *)assigned, nasgn * sizeof (pci_regspec_t) / sizeof (int));

        return (reprogram);
}

static void
add_ppb_props(dev_info_t *dip, uchar_t bus, uchar_t dev, uchar_t func,
    int pciex, ushort_t is_pci_bridge)
{
        char *dev_type;
        int i;
        uint_t val, io_range[2], mem_range[2], pmem_range[2];
        uchar_t secbus = pci_getb(bus, dev, func, PCI_BCNF_SECBUS);
        uchar_t subbus = pci_getb(bus, dev, func, PCI_BCNF_SUBBUS);
        uchar_t progclass;

        ASSERT(secbus <= subbus);

        /*
         * Check if it's a subtractive PPB.
         */
        progclass = pci_getb(bus, dev, func, PCI_CONF_PROGCLASS);
        if (progclass == PCI_BRIDGE_PCI_IF_SUBDECODE)
                pci_bus_res[secbus].subtractive = B_TRUE;

        /*
         * Some BIOSes lie about max pci busses, we allow for
         * such mistakes here
         */
        if (subbus > pci_bios_maxbus) {
                pci_bios_maxbus = subbus;
                alloc_res_array();
        }

        ASSERT(pci_bus_res[secbus].dip == NULL);
        pci_bus_res[secbus].dip = dip;
        pci_bus_res[secbus].par_bus = bus;

        dev_type = (pciex && !is_pci_bridge) ? "pciex" : "pci";

        /* setup bus number hierarchy */
        pci_bus_res[secbus].sub_bus = subbus;
        /*
         * Keep track of the largest subordinate bus number (this is essential
         * for peer busses because there is no other way of determining its
         * subordinate bus number).
         */
        if (subbus > pci_bus_res[bus].sub_bus)
                pci_bus_res[bus].sub_bus = subbus;
        /*
         * Loop through subordinate busses, initializing their parent bus
         * field to this bridge's parent.  The subordinate busses' parent
         * fields may very well be further refined later, as child bridges
         * are enumerated.  (The value is to note that the subordinate busses
         * are not peer busses by changing their par_bus fields to anything
         * other than -1.)
         */
        for (i = secbus + 1; i <= subbus; i++)
                pci_bus_res[i].par_bus = bus;

        (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip,
            "device_type", dev_type);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
            "#address-cells", 3);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
            "#size-cells", 2);

        /*
         * Collect bridge window specifications, and use them to populate
         * the "avail" resources for the bus.  Not all of those resources will
         * end up being available; this is done top-down, and so the initial
         * collection of windows populates the 'ranges' property for the
         * bus node.  Later, as children are found, resources are removed from
         * the 'avail' list, so that it becomes the freelist for
         * this point in the tree.  ranges may be set again after bridge
         * reprogramming in fix_ppb_res(), in which case it's set from
         * used + avail.
         *
         * According to PPB spec, the base register should be programmed
         * with a value bigger than the limit register when there are
         * no resources available. This applies to io, memory, and
         * prefetchable memory.
         */

        /*
         * io range
         * We determine i/o windows that are left unconfigured by BIOS
         * through its i/o enable bit as Microsoft recommends OEMs to do.
         * If it is unset, we disable i/o and mark it for reconfiguration in
         * later passes by setting the base > limit
         */
        val = (uint_t)pci_getw(bus, dev, func, PCI_CONF_COMM);
        if (val & PCI_COMM_IO) {
                val = (uint_t)pci_getb(bus, dev, func, PCI_BCNF_IO_BASE_LOW);
                io_range[0] = ((val & 0xf0) << 8);
                val = (uint_t)pci_getb(bus, dev, func, PCI_BCNF_IO_LIMIT_LOW);
                io_range[1]  = ((val & 0xf0) << 8) | 0xFFF;
        } else {
                io_range[0] = 0x9fff;
                io_range[1] = 0x1000;
                pci_putb(bus, dev, func, PCI_BCNF_IO_BASE_LOW,
                    (uint8_t)((io_range[0] >> 8) & 0xf0));
                pci_putb(bus, dev, func, PCI_BCNF_IO_LIMIT_LOW,
                    (uint8_t)((io_range[1] >> 8) & 0xf0));
                pci_putw(bus, dev, func, PCI_BCNF_IO_BASE_HI, 0);
                pci_putw(bus, dev, func, PCI_BCNF_IO_LIMIT_HI, 0);
        }

        if (io_range[0] != 0 && io_range[0] < io_range[1]) {
                memlist_insert(&pci_bus_res[secbus].io_avail,
                    (uint64_t)io_range[0],
                    (uint64_t)(io_range[1] - io_range[0] + 1));
                memlist_insert(&pci_bus_res[bus].io_used,
                    (uint64_t)io_range[0],
                    (uint64_t)(io_range[1] - io_range[0] + 1));
                if (pci_bus_res[bus].io_avail != NULL) {
                        (void) memlist_remove(&pci_bus_res[bus].io_avail,
                            (uint64_t)io_range[0],
                            (uint64_t)(io_range[1] - io_range[0] + 1));
                }
                dcmn_err(CE_NOTE, "bus %d io-range: 0x%x-%x",
                    secbus, io_range[0], io_range[1]);
                /* if 32-bit supported, make sure upper bits are not set */
                if ((val & 0xf) == 1 &&
                    pci_getw(bus, dev, func, PCI_BCNF_IO_BASE_HI)) {
                        cmn_err(CE_NOTE, "unsupported 32-bit IO address on"
                            " pci-pci bridge [%d/%d/%d]", bus, dev, func);
                }
        }

        /* mem range */
        val = (uint_t)pci_getw(bus, dev, func, PCI_BCNF_MEM_BASE);
        mem_range[0] = ((val & 0xFFF0) << 16);
        val = (uint_t)pci_getw(bus, dev, func, PCI_BCNF_MEM_LIMIT);
        mem_range[1] = ((val & 0xFFF0) << 16) | 0xFFFFF;
        if (mem_range[0] != 0 && mem_range[0] < mem_range[1]) {
                memlist_insert(&pci_bus_res[secbus].mem_avail,
                    (uint64_t)mem_range[0],
                    (uint64_t)(mem_range[1] - mem_range[0] + 1));
                memlist_insert(&pci_bus_res[bus].mem_used,
                    (uint64_t)mem_range[0],
                    (uint64_t)(mem_range[1] - mem_range[0] + 1));
                /* remove from parent resource list */
                (void) memlist_remove(&pci_bus_res[bus].mem_avail,
                    (uint64_t)mem_range[0],
                    (uint64_t)(mem_range[1] - mem_range[0] + 1));
                (void) memlist_remove(&pci_bus_res[bus].pmem_avail,
                    (uint64_t)mem_range[0],
                    (uint64_t)(mem_range[1] - mem_range[0] + 1));
                dcmn_err(CE_NOTE, "bus %d mem-range: 0x%x-%x",
                    secbus, mem_range[0], mem_range[1]);
        }

        /* prefetchable memory range */
        val = (uint_t)pci_getw(bus, dev, func, PCI_BCNF_PF_BASE_LOW);
        pmem_range[0] = ((val & 0xFFF0) << 16);
        val = (uint_t)pci_getw(bus, dev, func, PCI_BCNF_PF_LIMIT_LOW);
        pmem_range[1] = ((val & 0xFFF0) << 16) | 0xFFFFF;
        if (pmem_range[0] != 0 && pmem_range[0] < pmem_range[1]) {
                memlist_insert(&pci_bus_res[secbus].pmem_avail,
                    (uint64_t)pmem_range[0],
                    (uint64_t)(pmem_range[1] - pmem_range[0] + 1));
                memlist_insert(&pci_bus_res[bus].pmem_used,
                    (uint64_t)pmem_range[0],
                    (uint64_t)(pmem_range[1] - pmem_range[0] + 1));
                /* remove from parent resource list */
                (void) memlist_remove(&pci_bus_res[bus].pmem_avail,
                    (uint64_t)pmem_range[0],
                    (uint64_t)(pmem_range[1] - pmem_range[0] + 1));
                (void) memlist_remove(&pci_bus_res[bus].mem_avail,
                    (uint64_t)pmem_range[0],
                    (uint64_t)(pmem_range[1] - pmem_range[0] + 1));
                dcmn_err(CE_NOTE, "bus %d pmem-range: 0x%x-%x",
                    secbus, pmem_range[0], pmem_range[1]);
                /* if 64-bit supported, make sure upper bits are not set */
                if ((val & 0xf) == 1 &&
                    pci_getl(bus, dev, func, PCI_BCNF_PF_BASE_HIGH)) {
                        cmn_err(CE_NOTE, "unsupported 64-bit prefetch memory on"
                            " pci-pci bridge [%d/%d/%d]", bus, dev, func);
                }
        }

        /*
         * Add VGA legacy resources to the bridge's pci_bus_res if it
         * has VGA_ENABLE set.  Note that we put them in 'avail',
         * because that's used to populate the ranges prop; they'll be
         * removed from there by the VGA device once it's found.  Also,
         * remove them from the parent's available list and note them as
         * used in the parent.
         */

        if (pci_getw(bus, dev, func, PCI_BCNF_BCNTRL) &
            PCI_BCNF_BCNTRL_VGA_ENABLE) {

                memlist_insert(&pci_bus_res[secbus].io_avail, 0x3b0, 0xc);

                memlist_insert(&pci_bus_res[bus].io_used, 0x3b0, 0xc);
                if (pci_bus_res[bus].io_avail != NULL) {
                        (void) memlist_remove(&pci_bus_res[bus].io_avail,
                            0x3b0, 0xc);
                }

                memlist_insert(&pci_bus_res[secbus].io_avail, 0x3c0, 0x20);

                memlist_insert(&pci_bus_res[bus].io_used, 0x3c0, 0x20);
                if (pci_bus_res[bus].io_avail != NULL) {
                        (void) memlist_remove(&pci_bus_res[bus].io_avail,
                            0x3c0, 0x20);
                }

                memlist_insert(&pci_bus_res[secbus].mem_avail, 0xa0000,
                    0x20000);

                memlist_insert(&pci_bus_res[bus].mem_used, 0xa0000, 0x20000);
                if (pci_bus_res[bus].mem_avail != NULL) {
                        (void) memlist_remove(&pci_bus_res[bus].mem_avail,
                            0xa0000, 0x20000);
                }
        }
        add_bus_range_prop(secbus);
        add_ranges_prop(secbus, 1);
}

extern const struct pci_class_strings_s class_pci[];
extern int class_pci_items;

static void
add_model_prop(dev_info_t *dip, uint_t classcode)
{
        const char *desc;
        int i;
        uchar_t baseclass = classcode >> 16;
        uchar_t subclass = (classcode >> 8) & 0xff;
        uchar_t progclass = classcode & 0xff;

        if ((baseclass == PCI_CLASS_MASS) && (subclass == PCI_MASS_IDE)) {
                desc = "IDE controller";
        } else {
                for (desc = 0, i = 0; i < class_pci_items; i++) {
                        if ((baseclass == class_pci[i].base_class) &&
                            (subclass == class_pci[i].sub_class) &&
                            (progclass == class_pci[i].prog_class)) {
                                desc = class_pci[i].actual_desc;
                                break;
                        }
                }
                if (i == class_pci_items)
                        desc = "Unknown class of pci/pnpbios device";
        }

        (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip, "model",
            (char *)desc);
}

static void
add_bus_range_prop(int bus)
{
        int bus_range[2];

        if (pci_bus_res[bus].dip == NULL)
                return;
        bus_range[0] = bus;
        bus_range[1] = pci_bus_res[bus].sub_bus;
        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, pci_bus_res[bus].dip,
            "bus-range", (int *)bus_range, 2);
}

/*
 * Add slot-names property for any named pci hot-plug slots
 */
static void
add_bus_slot_names_prop(int bus)
{
        char slotprop[256];
        int len;
        extern int pci_irq_nroutes;
        char *slotcap_name;

        /*
         * If no irq routing table, then go with the slot-names as set up
         * in pciex_slot_names_prop() from slot capability register (if any).
         */
        if (pci_irq_nroutes == 0)
                return;

        /*
         * Otherise delete the slot-names we already have and use the irq
         * routing table values as returned by pci_slot_names_prop() instead,
         * but keep any property of value "pcie0" as that can't be represented
         * in the irq routing table.
         */
        if (pci_bus_res[bus].dip != NULL) {
                if (ddi_prop_lookup_string(DDI_DEV_T_ANY, pci_bus_res[bus].dip,
                    DDI_PROP_DONTPASS, "slot-names", &slotcap_name) !=
                    DDI_SUCCESS || strcmp(slotcap_name, "pcie0") != 0)
                        (void) ndi_prop_remove(DDI_DEV_T_NONE,
                            pci_bus_res[bus].dip, "slot-names");
        }

        len = pci_slot_names_prop(bus, slotprop, sizeof (slotprop));
        if (len > 0) {
                /*
                 * Only create a peer bus node if this bus may be a peer bus.
                 * It may be a peer bus if the dip is NULL and if par_bus is
                 * -1 (par_bus is -1 if this bus was not found to be
                 * subordinate to any PCI-PCI bridge).
                 * If it's not a peer bus, then the ACPI BBN-handling code
                 * will remove it later.
                 */
                if (pci_bus_res[bus].par_bus == (uchar_t)-1 &&
                    pci_bus_res[bus].dip == NULL) {

                        create_root_bus_dip(bus);
                }
                if (pci_bus_res[bus].dip != NULL) {
                        ASSERT((len % sizeof (int)) == 0);
                        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE,
                            pci_bus_res[bus].dip, "slot-names",
                            (int *)slotprop, len / sizeof (int));
                } else {
                        cmn_err(CE_NOTE, "!BIOS BUG: Invalid bus number in PCI "
                            "IRQ routing table; Not adding slot-names "
                            "property for incorrect bus %d", bus);
                }
        }
}

/*
 * Handle both PCI root and PCI-PCI bridge range properties;
 * non-zero 'ppb' argument select PCI-PCI bridges versus root.
 */
static void
memlist_to_ranges(void **rp, struct memlist *entry, int type, int ppb)
{
        ppb_ranges_t *ppb_rp = *rp;
        pci_ranges_t *pci_rp = *rp;

        while (entry != NULL) {
                if (ppb) {
                        ppb_rp->child_high = ppb_rp->parent_high = type;
                        ppb_rp->child_mid = ppb_rp->parent_mid =
                            (uint32_t)(entry->ml_address >> 32); /* XXX */
                        ppb_rp->child_low = ppb_rp->parent_low =
                            (uint32_t)entry->ml_address;
                        ppb_rp->size_high =
                            (uint32_t)(entry->ml_size >> 32); /* XXX */
                        ppb_rp->size_low = (uint32_t)entry->ml_size;
                        *rp = ++ppb_rp;
                } else {
                        pci_rp->child_high = type;
                        pci_rp->child_mid = pci_rp->parent_high =
                            (uint32_t)(entry->ml_address >> 32); /* XXX */
                        pci_rp->child_low = pci_rp->parent_low =
                            (uint32_t)entry->ml_address;
                        pci_rp->size_high =
                            (uint32_t)(entry->ml_size >> 32); /* XXX */
                        pci_rp->size_low = (uint32_t)entry->ml_size;
                        *rp = ++pci_rp;
                }
                entry = entry->ml_next;
        }
}

static void
add_ranges_prop(int bus, int ppb)
{
        int total, alloc_size;
        void    *rp, *next_rp;
        struct memlist *iolist, *memlist, *pmemlist;

        /* no devinfo node - unused bus, return */
        if (pci_bus_res[bus].dip == NULL)
                return;

        iolist = memlist = pmemlist = (struct memlist *)NULL;

        memlist_merge(&pci_bus_res[bus].io_avail, &iolist);
        memlist_merge(&pci_bus_res[bus].io_used, &iolist);
        memlist_merge(&pci_bus_res[bus].mem_avail, &memlist);
        memlist_merge(&pci_bus_res[bus].mem_used, &memlist);
        memlist_merge(&pci_bus_res[bus].pmem_avail, &pmemlist);
        memlist_merge(&pci_bus_res[bus].pmem_used, &pmemlist);

        total = memlist_count(iolist);
        total += memlist_count(memlist);
        total += memlist_count(pmemlist);

        /* no property is created if no ranges are present */
        if (total == 0)
                return;

        alloc_size = total *
            (ppb ? sizeof (ppb_ranges_t) : sizeof (pci_ranges_t));

        next_rp = rp = kmem_alloc(alloc_size, KM_SLEEP);

        memlist_to_ranges(&next_rp, iolist, PCI_ADDR_IO | PCI_REG_REL_M, ppb);
        memlist_to_ranges(&next_rp, memlist,
            PCI_ADDR_MEM32 | PCI_REG_REL_M, ppb);
        memlist_to_ranges(&next_rp, pmemlist,
            PCI_ADDR_MEM32 | PCI_REG_REL_M | PCI_REG_PF_M, ppb);

        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, pci_bus_res[bus].dip,
            "ranges", (int *)rp, alloc_size / sizeof (int));

        kmem_free(rp, alloc_size);
        memlist_free_all(&iolist);
        memlist_free_all(&memlist);
        memlist_free_all(&pmemlist);
}

static void
memlist_remove_list(struct memlist **list, struct memlist *remove_list)
{
        while (list && *list && remove_list) {
                (void) memlist_remove(list, remove_list->ml_address,
                    remove_list->ml_size);
                remove_list = remove_list->ml_next;
        }
}

static int
memlist_to_spec(struct pci_phys_spec *sp, struct memlist *list, int type)
{
        int i = 0;

        while (list) {
                /* assume 32-bit addresses */
                sp->pci_phys_hi = type;
                sp->pci_phys_mid = 0;
                sp->pci_phys_low = (uint32_t)list->ml_address;
                sp->pci_size_hi = 0;
                sp->pci_size_low = (uint32_t)list->ml_size;

                list = list->ml_next;
                sp++, i++;
        }
        return (i);
}

static void
add_bus_available_prop(int bus)
{
        int i, count;
        struct pci_phys_spec *sp;

        /* no devinfo node - unused bus, return */
        if (pci_bus_res[bus].dip == NULL)
                return;

        count = memlist_count(pci_bus_res[bus].io_avail) +
            memlist_count(pci_bus_res[bus].mem_avail) +
            memlist_count(pci_bus_res[bus].pmem_avail);

        if (count == 0)         /* nothing available */
                return;

        sp = kmem_alloc(count * sizeof (*sp), KM_SLEEP);
        i = memlist_to_spec(&sp[0], pci_bus_res[bus].io_avail,
            PCI_ADDR_IO | PCI_REG_REL_M);
        i += memlist_to_spec(&sp[i], pci_bus_res[bus].mem_avail,
            PCI_ADDR_MEM32 | PCI_REG_REL_M);
        i += memlist_to_spec(&sp[i], pci_bus_res[bus].pmem_avail,
            PCI_ADDR_MEM32 | PCI_REG_REL_M | PCI_REG_PF_M);
        ASSERT(i == count);

        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, pci_bus_res[bus].dip,
            "available", (int *)sp,
            i * sizeof (struct pci_phys_spec) / sizeof (int));
        kmem_free(sp, count * sizeof (*sp));
}

static void
alloc_res_array(void)
{
        static int array_size = 0;
        int old_size;
        void *old_res;

        if (array_size > pci_bios_maxbus + 1)
                return; /* array is big enough */

        old_size = array_size;
        old_res = pci_bus_res;

        if (array_size == 0)
                array_size = 16;        /* start with a reasonable number */

        while (array_size <= pci_bios_maxbus + 1)
                array_size <<= 1;
        pci_bus_res = (struct pci_bus_resource *)kmem_zalloc(
            array_size * sizeof (struct pci_bus_resource), KM_SLEEP);

        if (old_res) {  /* copy content and free old array */
                bcopy(old_res, pci_bus_res,
                    old_size * sizeof (struct pci_bus_resource));
                kmem_free(old_res, old_size * sizeof (struct pci_bus_resource));
        }
}

static void
create_ioapic_node(int bus, int dev, int fn, ushort_t vendorid,
    ushort_t deviceid)
{
        static dev_info_t *ioapicsnode = NULL;
        static int numioapics = 0;
        dev_info_t *ioapic_node;
        uint64_t physaddr;
        uint32_t lobase, hibase = 0;

        /* BAR 0 contains the IOAPIC's memory-mapped I/O address */
        lobase = (*pci_getl_func)(bus, dev, fn, PCI_CONF_BASE0);

        /* We (and the rest of the world) only support memory-mapped IOAPICs */
        if ((lobase & PCI_BASE_SPACE_M) != PCI_BASE_SPACE_MEM)
                return;

        if ((lobase & PCI_BASE_TYPE_M) == PCI_BASE_TYPE_ALL)
                hibase = (*pci_getl_func)(bus, dev, fn, PCI_CONF_BASE0 + 4);

        lobase &= PCI_BASE_M_ADDR_M;

        physaddr = (((uint64_t)hibase) << 32) | lobase;

        /*
         * Create a nexus node for all IOAPICs under the root node.
         */
        if (ioapicsnode == NULL) {
                if (ndi_devi_alloc(ddi_root_node(), IOAPICS_NODE_NAME,
                    (pnode_t)DEVI_SID_NODEID, &ioapicsnode) != NDI_SUCCESS) {
                        return;
                }
                (void) ndi_devi_online(ioapicsnode, 0);
        }

        /*
         * Create a child node for this IOAPIC
         */
        ioapic_node = ddi_add_child(ioapicsnode, IOAPICS_CHILD_NAME,
            DEVI_SID_NODEID, numioapics++);
        if (ioapic_node == NULL) {
                return;
        }

        /* Vendor and Device ID */
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, ioapic_node,
            IOAPICS_PROP_VENID, vendorid);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, ioapic_node,
            IOAPICS_PROP_DEVID, deviceid);

        /* device_type */
        (void) ndi_prop_update_string(DDI_DEV_T_NONE, ioapic_node,
            "device_type", IOAPICS_DEV_TYPE);

        /* reg */
        (void) ndi_prop_update_int64(DDI_DEV_T_NONE, ioapic_node,
            "reg", physaddr);
}

/*
 * NOTE: For PCIe slots, the name is generated from the slot number
 * information obtained from Slot Capabilities register.
 * For non-PCIe slots, it is generated based on the slot number
 * information in the PCI IRQ table.
 */
static void
pciex_slot_names_prop(dev_info_t *dip, ushort_t slot_num)
{
        char slotprop[256];
        int len;

        bzero(slotprop, sizeof (slotprop));

        /* set mask to 1 as there is only one slot (i.e dev 0) */
        *(uint32_t *)slotprop = 1;
        len = 4;
        (void) snprintf(slotprop + len, sizeof (slotprop) - len, "pcie%d",
            slot_num);
        len += strlen(slotprop + len) + 1;
        len += len % 4;
        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, dip, "slot-names",
            (int *)slotprop, len / sizeof (int));
}

/*
 * Enable reporting of AER capability next pointer.
 * This needs to be done only for CK8-04 devices
 * by setting NV_XVR_VEND_CYA1 (offset 0xf40) bit 13
 * NOTE: BIOS is disabling this, it needs to be enabled temporarily
 *
 * This function is adapted from npe_ck804_fix_aer_ptr(), and is
 * called from pci_boot.c.
 */
static void
ck804_fix_aer_ptr(dev_info_t *dip, pcie_req_id_t bdf)
{
        dev_info_t *rcdip;
        ushort_t cya1;

        rcdip = pcie_get_rc_dip(dip);
        ASSERT(rcdip != NULL);

        if ((pci_cfgacc_get16(rcdip, bdf, PCI_CONF_VENID) ==
            NVIDIA_VENDOR_ID) &&
            (pci_cfgacc_get16(rcdip, bdf, PCI_CONF_DEVID) ==
            NVIDIA_CK804_DEVICE_ID) &&
            (pci_cfgacc_get8(rcdip, bdf, PCI_CONF_REVID) >=
            NVIDIA_CK804_AER_VALID_REVID)) {
                cya1 = pci_cfgacc_get16(rcdip, bdf, NVIDIA_CK804_VEND_CYA1_OFF);
                if (!(cya1 & ~NVIDIA_CK804_VEND_CYA1_ERPT_MASK))
                        (void) pci_cfgacc_put16(rcdip, bdf,
                            NVIDIA_CK804_VEND_CYA1_OFF,
                            cya1 | NVIDIA_CK804_VEND_CYA1_ERPT_VAL);
        }
}