acpi/acpidev/acpidev_pci.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) 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_rsc.h>
#include <sys/acpidev_dr.h>
#include <sys/acpidev_impl.h>

static ACPI_STATUS acpidev_pci_probe(acpidev_walk_info_t *infop);

/*
 * Default class driver for PCI/PCIEX Host Bridge devices.
 */
acpidev_class_t acpidev_class_pci = {
    0,              /* adc_refcnt */
    ACPIDEV_CLASS_REV1,     /* adc_version */
    ACPIDEV_CLASS_ID_PCI,       /* adc_class_id */
    "PCI/PCIex Host Bridge",    /* adc_class_name */
    ACPIDEV_TYPE_PCI,       /* adc_dev_type */
    NULL,               /* adc_private */
    NULL,               /* adc_pre_probe */
    NULL,               /* adc_post_probe */
    acpidev_pci_probe,      /* adc_probe */
    NULL,               /* adc_filter */
    NULL,               /* adc_init */
    NULL,               /* adc_fini */
};

static char *acpidev_pci_device_ids[] = {
    ACPIDEV_HID_PCIEX_HOSTBRIDGE,
    ACPIDEV_HID_PCI_HOSTBRIDGE,
};

static char *acpidev_pciex_device_ids[] = {
    ACPIDEV_HID_PCIEX_HOSTBRIDGE,
};

static void
acpidev_pci_update_status(acpidev_walk_info_t *infop)
{
    int status;
    dev_info_t *dip = NULL;
    acpidev_data_handle_t dhdl;

    dhdl = infop->awi_data;
    ASSERT((dhdl->aod_iflag & ACPIDEV_ODF_DEVINFO_CREATED) == 0);
    ASSERT((dhdl->aod_iflag & ACPIDEV_ODF_DEVINFO_TAGGED) == 0);
    if ((dhdl->aod_iflag & ACPIDEV_ODF_STATUS_VALID) == 0) {
        status = acpidev_query_device_status(infop->awi_hdl);
        dhdl->aod_status = status;
        dhdl->aod_iflag |= ACPIDEV_ODF_STATUS_VALID;
    } else {
        status = dhdl->aod_status;
    }
    dhdl->aod_level = infop->awi_level;
    dhdl->aod_hdl = infop->awi_hdl;
    dhdl->aod_class = NULL;
    dhdl->aod_class_list = NULL;
    if (acpidev_match_device_id(infop->awi_info,
        ACPIDEV_ARRAY_PARAM(acpidev_pciex_device_ids))) {
        dhdl->aod_class_id = ACPIDEV_CLASS_ID_PCIEX;
    } else {
        dhdl->aod_class_id = ACPIDEV_CLASS_ID_PCI;
    }

    if (ACPI_FAILURE(acpica_get_devinfo(infop->awi_hdl, &dip))) {
        dip = NULL;
    } else {
        ASSERT(dip != NULL);
    }
    if (acpidev_check_device_enabled(status)) {
        /*
         * Mark the device as DISABLE if no device node created.
         * BIOS may hide some special PCI/PCIex buses from OS.
         */
        if (dip == NULL) {
            dhdl->aod_dip = NULL;
            dhdl->aod_status &= ~ACPI_STA_DEVICE_ENABLED;
        } else {
            dhdl->aod_dip = dip;
            dhdl->aod_iflag |= ACPIDEV_ODF_DEVINFO_CREATED;
        }
    } else {
        ASSERT(dip == NULL);
        dhdl->aod_dip = NULL;
        dhdl->aod_status &= ~ACPI_STA_DEVICE_ENABLED;
    }
}

static ACPI_STATUS
acpidev_pci_probe(acpidev_walk_info_t *infop)
{
    ACPI_STATUS rc = AE_OK;

    ASSERT(infop != NULL);
    ASSERT(infop->awi_hdl != NULL);
    ASSERT(infop->awi_info != NULL);
    if (infop->awi_info->Type != ACPI_TYPE_DEVICE ||
        acpidev_match_device_id(infop->awi_info,
        ACPIDEV_ARRAY_PARAM(acpidev_pci_device_ids)) == B_FALSE) {
        return (AE_OK);
    }

    if (acpica_get_devcfg_feature(ACPI_DEVCFG_PCI) == 0) {
        return (AE_OK);
    }

    if (infop->awi_op_type == ACPIDEV_OP_BOOT_PROBE) {
        /*
         * Check hotplug capability on the first pass.
         */
        acpidev_dr_check(infop);
    } else if (infop->awi_op_type == ACPIDEV_OP_BOOT_REPROBE) {
        /*
         * Check whether the PCI device enumerator has created device
         * nodes for PCI/PCIEX host bridges.
         */
        acpidev_pci_update_status(infop);
    } else if (infop->awi_op_type == ACPIDEV_OP_HOTPLUG_PROBE) {
        /*
         * No support of PCI/PCIEX host bridge hotplug yet.
         * It will come in next phase.
         */
        cmn_err(CE_WARN,
            "!acpidev: no support of PCI/PCIEX host bridge hotplug.");
        /*
         * Don't block the hot-adding process, just skip it.
         */
        rc = AE_OK;
    } else {
        ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
            "in acpidev_pci_probe().", infop->awi_op_type);
        rc = AE_BAD_PARAMETER;
    }
    if (ACPI_FAILURE(rc) && rc != AE_NOT_EXIST && rc != AE_ALREADY_EXISTS) {
        cmn_err(CE_CONT, "?acpidev: failed to process PCI/PCIEX host "
            "bridge object %s.\n", infop->awi_name);
    } else {
        rc = AE_OK;
    }

    return (rc);
}