acpi/acpidev/acpidev_scope.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) 2009-2010, Intel Corporation.
 * All rights reserved.
 */

#include <sys/types.h>
#include <sys/atomic.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/acpi/acpi.h>
#include <sys/acpica.h>
#include <sys/acpidev.h>
#include <sys/acpidev_impl.h>

static ACPI_STATUS acpidev_scope_probe(acpidev_walk_info_t *infop);
static acpidev_filter_result_t acpidev_scope_filter(acpidev_walk_info_t *infop,
    char *devname, int maxlen);
static ACPI_STATUS acpidev_scope_init(acpidev_walk_info_t *infop);

/*
 * Default class driver for ACPI scope objects.
 * This class driver is used to handle predefined ACPI SCOPE objects
 * under the ACPI root object, such as _PR_, _SB_ and _TZ_ etc.
 * The default policy for ACPI SCOPE objects is SKIP.
 */
acpidev_class_t acpidev_class_scope = {
    0,              /* adc_refcnt */
    ACPIDEV_CLASS_REV1,     /* adc_version */
    ACPIDEV_CLASS_ID_SCOPE,     /* adc_class_id */
    "ACPI Scope",           /* adc_class_name */
    ACPIDEV_TYPE_SCOPE,     /* adc_dev_type */
    NULL,               /* adc_private */
    NULL,               /* adc_pre_probe */
    NULL,               /* adc_post_probe */
    acpidev_scope_probe,        /* adc_probe */
    acpidev_scope_filter,       /* adc_filter */
    acpidev_scope_init,     /* adc_init */
    NULL,               /* adc_fini */
};

acpidev_class_list_t *acpidev_class_list_scope = NULL;

/*
 * All SCOPE objects share a global pseudo unit address space across the system.
 */
static uint32_t acpidev_scope_unitaddr = 0;

/* Filter rule table for ACPI SCOPE objects. */
static acpidev_filter_rule_t acpidev_scope_filters[] = {
    {   /* For safety, _SB_ is hardcoded as DEVICE by acpica */
        NULL,
        0,
        ACPIDEV_FILTER_DEFAULT,
        &acpidev_class_list_device,
        1,
        1,
        ACPIDEV_OBJECT_NAME_SB,
        ACPIDEV_NODE_NAME_MODULE_SBD,
    },
    {   /* Handle _PR_ object. */
        NULL,
        0,
        ACPIDEV_FILTER_SCAN,
        &acpidev_class_list_scope,
        1,
        1,
        ACPIDEV_OBJECT_NAME_PR,
        ACPIDEV_NODE_NAME_PROCESSOR,
    },
    {   /* Ignore all other scope objects. */
        NULL,
        0,
        ACPIDEV_FILTER_SKIP,
        NULL,
        1,
        INT_MAX,
        NULL,
        NULL,
    }
};

static ACPI_STATUS
acpidev_scope_probe(acpidev_walk_info_t *infop)
{
    ACPI_STATUS rc = AE_OK;
    int flags;

    ASSERT(infop != NULL);
    ASSERT(infop->awi_hdl != NULL);
    ASSERT(infop->awi_info != NULL);
    if (infop->awi_info->Type != ACPI_TYPE_LOCAL_SCOPE) {
        return (AE_OK);
    }

    flags = ACPIDEV_PROCESS_FLAG_SCAN;
    switch (infop->awi_op_type) {
    case ACPIDEV_OP_BOOT_PROBE:
        flags |= ACPIDEV_PROCESS_FLAG_CREATE;
        break;

    case ACPIDEV_OP_BOOT_REPROBE:
        break;

    case ACPIDEV_OP_HOTPLUG_PROBE:
        flags |= ACPIDEV_PROCESS_FLAG_SYNCSTATUS |
            ACPIDEV_PROCESS_FLAG_HOLDBRANCH;
        break;

    default:
        ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
            "in acpidev_scope_probe().", infop->awi_op_type);
        rc = AE_BAD_PARAMETER;
        break;
    }

    if (rc == AE_OK) {
        rc = acpidev_process_object(infop, flags);
    }
    if (ACPI_FAILURE(rc) && rc != AE_NOT_EXIST && rc != AE_ALREADY_EXISTS) {
        cmn_err(CE_WARN,
            "!acpidev: failed to process scope object %s.",
            infop->awi_name);
    } else {
        rc = AE_OK;
    }

    return (rc);
}

static acpidev_filter_result_t
acpidev_scope_filter(acpidev_walk_info_t *infop, char *devname, int maxlen)
{
    acpidev_filter_result_t res;

    ASSERT(infop != NULL);
    if (infop->awi_op_type == ACPIDEV_OP_BOOT_PROBE ||
        infop->awi_op_type == ACPIDEV_OP_BOOT_REPROBE ||
        infop->awi_op_type == ACPIDEV_OP_HOTPLUG_PROBE) {
        res = acpidev_filter_device(infop, infop->awi_hdl,
            ACPIDEV_ARRAY_PARAM(acpidev_scope_filters),
            devname, maxlen);
    } else {
        ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
            "in acpidev_scope_filter().", infop->awi_op_type);
        res = ACPIDEV_FILTER_FAILED;
    }

    return (res);
}

static ACPI_STATUS
acpidev_scope_init(acpidev_walk_info_t *infop)
{
    char unitaddr[32];
    char *compatible[] = {
        ACPIDEV_HID_SCOPE,
        ACPIDEV_TYPE_SCOPE,
        ACPIDEV_HID_VIRTNEX,
        ACPIDEV_TYPE_VIRTNEX,
    };

    ASSERT(infop != NULL);
    ASSERT(infop->awi_hdl != NULL);
    ASSERT(infop->awi_dip != NULL);
    if (ACPI_FAILURE(acpidev_set_compatible(infop,
        ACPIDEV_ARRAY_PARAM(compatible)))) {
        return (AE_ERROR);
    }
    (void) snprintf(unitaddr, sizeof (unitaddr), "%u",
        atomic_inc_32_nv(&acpidev_scope_unitaddr) - 1);
    if (ACPI_FAILURE(acpidev_set_unitaddr(infop, NULL, 0, unitaddr))) {
        return (AE_ERROR);
    }

    return (AE_OK);
}