/*-
 * Copyright (c) 2002 Adaptec Inc.
 * All rights reserved.
 *
 * Written by: David Jeffery
 *
 * 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.
 *
 * $FreeBSD: src/sys/dev/ips/ips_pci.c,v 1.10 2004/03/19 17:36:47 scottl Exp $
 */

#include <dev/raid/ips/ips.h>

static int ips_pci_free(ips_softc_t *sc);
static void ips_intrhook(void *arg);

static struct ips_pci_product {
        uint16_t vendor, device;
        const char *desc;
        int (*ips_adapter_reinit)(struct ips_softc *, int);
        void (*ips_adapter_intr)(void *);
        void (*ips_issue_cmd)(ips_command_t *);
        void (*ips_poll_cmd)(ips_command_t *);
} ips_pci_products[] = {
        { IPS_VENDOR_ID, IPS_MORPHEUS_DEVICE_ID, "IBM ServeRAID Adapter",
          ips_morpheus_reinit, ips_morpheus_intr, ips_issue_morpheus_cmd,
          ips_morpheus_poll },
        { IPS_VENDOR_ID, IPS_COPPERHEAD_DEVICE_ID, "IBM ServeRAID Adapter",
          ips_copperhead_reinit, ips_copperhead_intr, ips_issue_copperhead_cmd,
          ips_copperhead_poll },
        { IPS_VENDOR_ID_ADAPTEC, IPS_MARCO_DEVICE_ID,
          "Adaptec ServeRAID Adapter", ips_morpheus_reinit, ips_morpheus_intr,
          ips_issue_morpheus_cmd, ips_morpheus_poll },
        { 0, 0, NULL }
};

static int
ips_pci_probe(device_t dev)
{
        uint16_t vendor = pci_get_vendor(dev);
        uint16_t device = pci_get_device(dev);
        struct ips_pci_product *pp;
        ips_softc_t *sc;

        for (pp = ips_pci_products; pp->vendor; pp++) {
                if (vendor == pp->vendor && device == pp->device) {
                        sc = (ips_softc_t *)device_get_softc(dev);
                        sc->ips_adapter_reinit = pp->ips_adapter_reinit;
                        sc->ips_adapter_intr = pp->ips_adapter_intr;
                        sc->ips_issue_cmd = pp->ips_issue_cmd;
                        sc->ips_poll_cmd = pp->ips_poll_cmd;
                        device_set_desc(dev, pp->desc);
                        return (0);
                }
        }
        return (ENXIO);
}

static int
ips_pci_attach(device_t dev)
{
        u_int32_t command;
        ips_softc_t *sc;
        int error;

        if (resource_disabled(device_get_name(dev), device_get_unit(dev))) {
                device_printf(dev, "device is disabled\n");
                /* but return 0 so the !$)$)*!$*) unit isn't reused */
                return (0);
        }
        DEVICE_PRINTF(1, dev, "in attach.\n");
        sc = (ips_softc_t *)device_get_softc(dev);
        sc->dev = dev;
        /* make sure busmastering is on */
        pci_enable_busmaster(dev);
        command = pci_read_config(dev, PCIR_COMMAND, 1);
        /* seting up io space */
        sc->iores = NULL;
        if (command & PCIM_CMD_MEMEN) {
                PRINTF(10, "trying MEMIO\n");
                if (pci_get_device(dev) == IPS_COPPERHEAD_DEVICE_ID)
                        sc->rid = PCIR_BAR(1);
                else
                        sc->rid = PCIR_BAR(0);
                sc->iotype = SYS_RES_MEMORY;
                sc->iores = bus_alloc_resource_any(dev, sc->iotype,
                    &sc->rid, RF_ACTIVE);
        }
        if (sc->iores == NULL && command & PCIM_CMD_PORTEN) {
                PRINTF(10, "trying PORTIO\n");
                sc->rid = PCIR_BAR(0);
                sc->iotype = SYS_RES_IOPORT;
                sc->iores = bus_alloc_resource_any(dev, sc->iotype,
                    &sc->rid, RF_ACTIVE);
        }
        if (sc->iores == NULL) {
                device_printf(dev, "resource allocation failed\n");
                return (ENXIO);
        }
        sc->bustag = rman_get_bustag(sc->iores);
        sc->bushandle = rman_get_bushandle(sc->iores);
        /*
         * allocate an interrupt. when does the irq become active?
         * after leaving attach?
         */
        sc->irqrid = 0;
        if ((sc->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ,
            &sc->irqrid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
                device_printf(dev, "irq allocation failed\n");
                goto error;
        }
        error = bus_setup_intr(dev, sc->irqres, 0,
                               sc->ips_adapter_intr, sc, 
                               &sc->irqcookie, NULL);
        if (error) {
                device_printf(dev, "irq setup failed\n");
                goto error;
        }
        if (bus_dma_tag_create( /* parent    */ NULL,
                                /* alignemnt */ 1,
                                /* boundary  */ 0,
                                /* lowaddr   */ BUS_SPACE_MAXADDR_32BIT,
                                /* highaddr  */ BUS_SPACE_MAXADDR,
                                /* maxsize   */ BUS_SPACE_MAXSIZE_32BIT,
                                /* numsegs   */ IPS_MAX_SG_ELEMENTS,
                                /* maxsegsize*/ BUS_SPACE_MAXSIZE_32BIT,
                                /* flags     */ 0,
                                &sc->adapter_dmatag) != 0) {
                kprintf("IPS can't alloc dma tag\n");
                goto error;
        }
        sc->ips_ich.ich_func = ips_intrhook;
        sc->ips_ich.ich_arg = sc;
        sc->ips_ich.ich_desc = "ips";
        lockinit(&sc->queue_lock, "ipslk", 0, LK_CANRECURSE);
        bioq_init(&sc->bio_queue);
        if (config_intrhook_establish(&sc->ips_ich) != 0) {
                kprintf("IPS can't establish configuration hook\n");
                goto error;
        }
        return 0;
error:
        ips_pci_free(sc);
        return (ENXIO);
}

static void
ips_intrhook(void *arg)
{
        struct ips_softc *sc = arg;

        config_intrhook_disestablish(&sc->ips_ich);
        if (ips_adapter_init(sc))
                ips_pci_free(sc);
        else
                sc->configured = 1;
}

static int
ips_pci_free(ips_softc_t *sc)
{

        if (sc->adapter_dmatag)
                bus_dma_tag_destroy(sc->adapter_dmatag);
        if (sc->irqcookie)
                bus_teardown_intr(sc->dev, sc->irqres, sc->irqcookie);
        if (sc->irqres)
                bus_release_resource(sc->dev, SYS_RES_IRQ, sc->irqrid,
                    sc->irqres);
        if (sc->iores)
                bus_release_resource(sc->dev, sc->iotype, sc->rid, sc->iores);
        sc->configured = 0;
        return 0;
}

static int
ips_pci_detach(device_t dev)
{
        ips_softc_t *sc;

        DEVICE_PRINTF(1, dev, "detaching ServeRaid\n");
        sc = (ips_softc_t *)device_get_softc(dev);
        if (sc->configured) {
                sc->configured = 0;
                ips_flush_cache(sc);
                if (ips_adapter_free(sc))
                        return EBUSY;
                ips_pci_free(sc);
        }
        return 0;
}

static int
ips_pci_shutdown(device_t dev)
{
        ips_softc_t *sc;

        sc = (ips_softc_t *)device_get_softc(dev);
        if (sc->configured)
                ips_flush_cache(sc);
        return 0;
}

static device_method_t ips_driver_methods[] = {
        DEVMETHOD(device_probe, ips_pci_probe),
        DEVMETHOD(device_attach, ips_pci_attach),
        DEVMETHOD(device_detach, ips_pci_detach),
        DEVMETHOD(device_shutdown, ips_pci_shutdown),
        DEVMETHOD_END
};

static driver_t ips_pci_driver = {
        "ips",
        ips_driver_methods,
        sizeof(ips_softc_t),
};

static devclass_t ips_devclass;
DRIVER_MODULE(ips, pci, ips_pci_driver, ips_devclass, NULL, NULL);