freebsd/sys/pci/pci_compat.c

/*
 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
 * 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 unmodified, 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 ``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 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.
 *
 * $FreeBSD$
 *
 */

#include "opt_bus.h"

/* for compatibility to FreeBSD-2.2 and 3.x versions of PCI code */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>

#include <vm/vm.h>
#include <vm/pmap.h>
#include <sys/interrupt.h>

#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>

#include <sys/pciio.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>

#ifdef APIC_IO
#include <machine/smp.h>
#endif

#ifdef __i386__
#include <i386/isa/intr_machdep.h>
#endif


/* ------------------------------------------------------------------------- */

u_long
pci_conf_read(pcici_t cfg, u_long reg)
{
	return (pci_read_config(cfg->dev, reg, 4));
}

void
pci_conf_write(pcici_t cfg, u_long reg, u_long data)
{
	pci_write_config(cfg->dev, reg, data, 4);
}

int
pci_map_port(pcici_t cfg, u_long reg, pci_port_t* pa)
{
	int rid;
	struct resource *res;

	rid = reg;
	res = bus_alloc_resource(cfg->dev, SYS_RES_IOPORT, &rid,
				 0, ~0, 1, RF_ACTIVE);
	if (res) {
		*pa = rman_get_start(res);
		return (1);
	}
	return (0);
}

int
pci_map_mem(pcici_t cfg, u_long reg, vm_offset_t* va, vm_offset_t* pa)
{
	int rid;
	struct resource *res;

	rid = reg;
	res = bus_alloc_resource(cfg->dev, SYS_RES_MEMORY, &rid,
				 0, ~0, 1, RF_ACTIVE);
	if (res) {
		*pa = rman_get_start(res);
		*va = (vm_offset_t) rman_get_virtual(res);
		return (1);
	}
	return (0);
}

int
pci_map_int(pcici_t cfg, pci_inthand_t *handler, void *arg, intrmask_t *maskptr)
{
	return (pci_map_int_right(cfg, handler, arg, maskptr, 0));
}

int
pci_map_int_right(pcici_t cfg, pci_inthand_t *handler, void *arg,
		  intrmask_t *maskptr, u_int intflags)
{
	int error;
#ifdef APIC_IO
	int nextpin, muxcnt;
#endif
	if (cfg->intpin != 0) {
		int irq = cfg->intline;
		int rid = 0;
		struct resource *res;
		int flags = 0;
		int resflags = RF_SHAREABLE|RF_ACTIVE;
		void *ih;

#ifdef INTR_FAST
		if (intflags & INTR_FAST)
			flags |= INTR_TYPE_FAST;
		if (intflags & INTR_EXCL)
			resflags &= ~RF_SHAREABLE;
#endif

		res = bus_alloc_resource(cfg->dev, SYS_RES_IRQ, &rid,
					 irq, irq, 1, resflags);
		if (!res) {
			printf("pci_map_int: can't allocate interrupt\n");
			return 0;
		}

		/*
		 * This is ugly. Translate the mask into an interrupt type.
		 */
		if (maskptr == &tty_imask)
			flags |= INTR_TYPE_TTY;
		else if (maskptr == &bio_imask)
			flags |= INTR_TYPE_BIO;
		else if (maskptr == &net_imask)
			flags |= INTR_TYPE_NET;
		else if (maskptr == &cam_imask)
			flags |= INTR_TYPE_CAM;

		error = BUS_SETUP_INTR(device_get_parent(cfg->dev), cfg->dev,
				       res, flags, handler, arg, &ih);
		if (error != 0)
			return 0;

#ifdef NEW_BUS_PCI
		/*
		 * XXX this apic stuff looks totally busted.  It should
		 * move to the nexus code which actually registers the
		 * interrupt.
		 */
#endif

#ifdef APIC_IO
		nextpin = next_apic_irq(irq);
		
		if (nextpin < 0)
			return 1;

		/* 
		 * Attempt handling of some broken mp tables.
		 *
		 * It's OK to yell (since the mp tables are broken).
		 * 
		 * Hanging in the boot is not OK
		 */

		muxcnt = 2;
		nextpin = next_apic_irq(nextpin);
		while (muxcnt < 5 && nextpin >= 0) {
			muxcnt++;
			nextpin = next_apic_irq(nextpin);
		}
		if (muxcnt >= 5) {
			printf("bogus MP table, more than 4 IO APIC pins connected to the same PCI device or ISA/EISA interrupt\n");
			return 0;
		}
		
		printf("bogus MP table, %d IO APIC pins connected to the same PCI device or ISA/EISA interrupt\n", muxcnt);

		nextpin = next_apic_irq(irq);
		while (nextpin >= 0) {
			rid = 0;
			res = bus_alloc_resource(cfg->dev, SYS_RES_IRQ, &rid,
						 nextpin, nextpin, 1,
						 resflags);
			if (!res) {
				printf("pci_map_int: can't allocate extra interrupt\n");
				return 0;
			}
			error = BUS_SETUP_INTR(device_get_parent(cfg->dev),
					       cfg->dev, res, flags,
					       handler, arg, &ih);
			if (error != 0) {
				printf("pci_map_int: BUS_SETUP_INTR failed\n");
				return 0;
			}
			printf("Registered extra interrupt handler for int %d (in addition to int %d)\n", nextpin, irq);
			nextpin = next_apic_irq(nextpin);
		}
#endif
	}
	return (1);
}

int
pci_unmap_int(pcici_t cfg)
{
	return (0); /* not supported, yet, since cfg doesn't know about idesc */
}

pcici_t
pci_get_parent_from_tag(pcici_t tag)
{
	return (pcici_t)pci_devlist_get_parent(tag);
}

int
pci_get_bus_from_tag(pcici_t tag)
{
	return tag->bus;
}

/*
 * A simple driver to wrap the old pci driver mechanism for back-compat.
 */

static int
pci_compat_probe(device_t dev)
{
	struct pci_device *dvp;
	struct pci_devinfo *dinfo;
	pcicfgregs *cfg;
	const char *name;
	int error;
	
	dinfo = device_get_ivars(dev);
	cfg = &dinfo->cfg;
	dvp = device_get_driver(dev)->priv;

	/*
	 * Do the wrapped probe.
	 */
	error = ENXIO;
	if (dvp && dvp->pd_probe) {
		name = dvp->pd_probe(cfg, (cfg->device << 16) + cfg->vendor);
		if (name) {
			device_set_desc_copy(dev, name);
			/* Allow newbus drivers to match "better" */
			error = -200;
		}
	}

	return error;
}

static int
pci_compat_attach(device_t dev)
{
	struct pci_device *dvp;
	struct pci_devinfo *dinfo;
	pcicfgregs *cfg;
	int unit;

	dinfo = device_get_ivars(dev);
	cfg = &dinfo->cfg;
	dvp = device_get_driver(dev)->priv;

	unit = device_get_unit(dev);
	if (unit > *dvp->pd_count)
		*dvp->pd_count = unit;
	if (dvp->pd_attach)
		dvp->pd_attach(cfg, unit);
	device_printf(dev, "driver is using old-style compatability shims\n");
	return 0;
}

static device_method_t pci_compat_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		pci_compat_probe),
	DEVMETHOD(device_attach,	pci_compat_attach),

	{ 0, 0 }
};

/*
 * Create a new style driver around each old pci driver.
 */
int
compat_pci_handler(module_t mod, int type, void *data)
{
	struct pci_device *dvp = (struct pci_device *)data;
	driver_t *driver;
	devclass_t pci_devclass = devclass_find("pci");

	switch (type) {
	case MOD_LOAD:
		driver = malloc(sizeof(driver_t), M_DEVBUF, M_NOWAIT);
		if (!driver)
			return ENOMEM;
		bzero(driver, sizeof(driver_t));
		driver->name = dvp->pd_name;
		driver->methods = pci_compat_methods;
		driver->size = sizeof(struct pci_devinfo *);
		driver->priv = dvp;
		devclass_add_driver(pci_devclass, driver);
		break;
	case MOD_UNLOAD:
		printf("%s: module unload not supported!\n", dvp->pd_name);
		return EOPNOTSUPP;
	default:
		break;
	}
	return 0;
}