/*-
 * 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 $
 * $DragonFly: src/sys/dev/raid/ips/ips_pci.c,v 1.13 2005/08/09 16:23:13 dillon 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, INTR_TYPE_BIO,
			       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,
				/* filter    */	NULL,
				/* filterarg */	NULL,
				/* maxsize   */	BUS_SPACE_MAXSIZE_32BIT,
				/* numsegs   */	IPS_MAX_SG_ELEMENTS,
				/* maxsegsize*/	BUS_SPACE_MAXSIZE_32BIT,
				/* flags     */	0,
				&sc->adapter_dmatag) != 0) {
		printf("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";
	lwkt_rwlock_init(&sc->queue_lock);
	bufq_init(&sc->queue);
	if (config_intrhook_establish(&sc->ips_ich) != 0) {
		printf("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),
	{ 0, 0 }
};

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, 0, 0);