/*
 * 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);
}