/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/selinfo.h>
#include <sys/efi.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>

#ifdef LOCAL_MODULE
#include <ipmivars.h>
#else
#include <dev/ipmi/ipmivars.h>
#endif

static int ipmi_pci_probe(device_t dev);
static int ipmi_pci_attach(device_t dev);

static struct ipmi_ident
{
        u_int16_t       vendor;
        u_int16_t       device;
        char            *desc;
} ipmi_identifiers[] = {
        {0x1028, 0x000d, "Dell PE2650 SMIC interface"},
        {0, 0, 0}
};

const char *
ipmi_pci_match(uint16_t vendor, uint16_t device)
{
        struct ipmi_ident *m;

        for (m = ipmi_identifiers; m->vendor != 0; m++)
                if (m->vendor == vendor && m->device == device)
                        return (m->desc);
        return (NULL);
}

static int
ipmi_pci_probe(device_t dev)
{
        const char *desc;

        if (ipmi_attached)
                return (ENXIO);

        desc = ipmi_pci_match(pci_get_vendor(dev), pci_get_device(dev));
        if (desc != NULL) {
                device_set_desc(dev, desc);
                return (BUS_PROBE_DEFAULT);
        }

        return (ENXIO);
}

static int
ipmi_pci_attach(device_t dev)
{
        struct ipmi_softc *sc = device_get_softc(dev);
        struct ipmi_get_info info;
        const char *mode;
        int error, type;

        /* Look for an IPMI entry in the SMBIOS table. */
        if (!ipmi_smbios_identify(&info))
                return (ENXIO);

        sc->ipmi_dev = dev;

        switch (info.iface_type) {
        case KCS_MODE:
                mode = "KCS";
                break;
        case SMIC_MODE:
                mode = "SMIC";
                break;
        case BT_MODE:
                mode = "BT";
                break;
        default:
                device_printf(dev, "No IPMI interface found\n");
                return (ENXIO);
        }

        device_printf(dev, "%s mode found at %s 0x%jx alignment 0x%x on %s\n",
            mode, info.io_mode ? "io" : "mem",
            (uintmax_t)info.address, info.offset,
            device_get_name(device_get_parent(dev)));
        if (info.io_mode)
                type = SYS_RES_IOPORT;
        else
                type = SYS_RES_MEMORY;

        sc->ipmi_io_rid = PCIR_BAR(0);
        sc->ipmi_io_res[0] = bus_alloc_resource_any(dev, type,
            &sc->ipmi_io_rid, RF_ACTIVE);
        sc->ipmi_io_type = type;
        sc->ipmi_io_spacing = info.offset;

        if (sc->ipmi_io_res[0] == NULL) {
                device_printf(dev, "couldn't configure pci io res\n");
                return (ENXIO);
        }

        sc->ipmi_irq_rid = 0;
        sc->ipmi_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
            &sc->ipmi_irq_rid, RF_SHAREABLE | RF_ACTIVE);

        error = ENXIO;
        switch (info.iface_type) {
        case KCS_MODE:
                error = ipmi_kcs_attach(sc);
                break;
        case SMIC_MODE:
                error = ipmi_smic_attach(sc);
                break;
        case BT_MODE:
                error = ipmi_bt_attach(sc);
                break;
        }
        if (error)
                goto bad;
        error = ipmi_attach(dev);
        if (error)
                goto bad;

        return (0);
bad:
        ipmi_release_resources(dev);
        return (error);
}

static device_method_t ipmi_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,     ipmi_pci_probe),
        DEVMETHOD(device_attach,    ipmi_pci_attach),
        DEVMETHOD(device_detach,    ipmi_detach),
        DEVMETHOD_END
};

static driver_t ipmi_pci_driver = {
        "ipmi",
        ipmi_methods,
        sizeof(struct ipmi_softc)
};

DRIVER_MODULE(ipmi_pci, pci, ipmi_pci_driver, 0, 0);

/* Native IPMI on PCI driver. */

static int
ipmi2_pci_probe(device_t dev)
{

        if (pci_get_class(dev) == PCIC_SERIALBUS &&
            pci_get_subclass(dev) == PCIS_SERIALBUS_IPMI) {
                device_set_desc(dev, "IPMI System Interface");
                return (BUS_PROBE_GENERIC);
        }

        return (ENXIO);
}

static int
ipmi2_pci_attach(device_t dev)
{
        struct ipmi_softc *sc;
        int error, iface, type;

        sc = device_get_softc(dev);
        sc->ipmi_dev = dev;

        /* Interface is determined by progif. */
        switch (pci_get_progif(dev)) {
        case PCIP_SERIALBUS_IPMI_SMIC:
                iface = SMIC_MODE;
                break;
        case PCIP_SERIALBUS_IPMI_KCS:
                iface = KCS_MODE;
                break;
        case PCIP_SERIALBUS_IPMI_BT:
                iface = BT_MODE;
                break;
        default:
                device_printf(dev, "Unsupported interface: %d\n",
                    pci_get_progif(dev));
                return (ENXIO);
        }

        /* Check the BAR to determine our resource type. */
        sc->ipmi_io_rid = PCIR_BAR(0);
        if (PCI_BAR_IO(pci_read_config(dev, PCIR_BAR(0), 4)))
                type = SYS_RES_IOPORT;
        else
                type = SYS_RES_MEMORY;
        sc->ipmi_io_type = type;
        sc->ipmi_io_spacing = 1;
        sc->ipmi_io_res[0] = bus_alloc_resource_any(dev, type,
            &sc->ipmi_io_rid, RF_ACTIVE);
        if (sc->ipmi_io_res[0] == NULL) {
                device_printf(dev, "couldn't map ports/memory\n");
                return (ENXIO);
        }

        sc->ipmi_irq_rid = 0;
        sc->ipmi_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
            &sc->ipmi_irq_rid, RF_SHAREABLE | RF_ACTIVE);

        error = ENXIO;
        switch (iface) {
        case KCS_MODE:
                device_printf(dev, "using KSC interface\n");

                /*
                 * We have to examine the resource directly to determine the
                 * alignment.
                 */
                if (!ipmi_kcs_probe_align(sc)) {
                        device_printf(dev, "Unable to determine alignment\n");
                        goto bad;
                }

                error = ipmi_kcs_attach(sc);
                if (error)
                        goto bad;
                break;
        case SMIC_MODE:
                device_printf(dev, "using SMIC interface\n");
                error = ipmi_smic_attach(sc);
                break;
        case BT_MODE:
                device_printf(dev, "using BT interface\n");
                error = ipmi_bt_attach(sc);
                break;
        }
        if (error)
                goto bad;
        error = ipmi_attach(dev);
        if (error)
                goto bad;

        return (0);
bad:
        ipmi_release_resources(dev);
        return (error);
}

static device_method_t ipmi2_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,     ipmi2_pci_probe),
        DEVMETHOD(device_attach,    ipmi2_pci_attach),
        DEVMETHOD(device_detach,    ipmi_detach),
        DEVMETHOD_END
};

static driver_t ipmi2_pci_driver = {
        "ipmi",
        ipmi2_methods,
        sizeof(struct ipmi_softc)
};

DRIVER_MODULE(ipmi2_pci, pci, ipmi2_pci_driver, 0, 0);
#ifdef ARCH_MAY_USE_EFI
MODULE_DEPEND(ipmi2_pci, efirt, 1, 1, 1);
#endif