OpenBSD-4.6/sys/dev/pci/agp_sis.c
/* $OpenBSD: agp_sis.c,v 1.13 2009/05/10 16:57:44 oga Exp $ */
/* $NetBSD: agp_sis.c,v 1.2 2001/09/15 00:25:00 thorpej Exp $ */
/*-
* Copyright (c) 2000 Doug Rabson
* 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.
*
* $FreeBSD: src/sys/pci/agp_sis.c,v 1.3 2001/07/05 21:28:47 jhb Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/agpio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/vga_pcivar.h>
#include <dev/pci/agpvar.h>
#include <dev/pci/agpreg.h>
#include <machine/bus.h>
struct agp_sis_softc {
struct device dev;
struct agp_softc *agpdev;
struct agp_gatt *gatt;
pci_chipset_tag_t ssc_pc;
pcitag_t ssc_tag;
bus_addr_t ssc_apaddr;
bus_size_t ssc_apsize;
};
void agp_sis_attach(struct device *, struct device *, void *);
int agp_sis_probe(struct device *, void *, void *);
bus_size_t agp_sis_get_aperture(void *);
int agp_sis_set_aperture(void *, bus_size_t);
void agp_sis_bind_page(void *, bus_addr_t, paddr_t, int);
void agp_sis_unbind_page(void *, bus_addr_t);
void agp_sis_flush_tlb(void *);
struct cfattach sisagp_ca = {
sizeof(struct agp_sis_softc), agp_sis_probe, agp_sis_attach
};
struct cfdriver sisagp_cd = {
NULL, "sisagp", DV_DULL
};
const struct agp_methods agp_sis_methods = {
agp_sis_bind_page,
agp_sis_unbind_page,
agp_sis_flush_tlb,
};
int
agp_sis_probe(struct device *parent, void *match, void *aux)
{
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
/* Must be a pchb, don't attach to iommu-style agp devs */
if (agpbus_probe(aa) == 1 && PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SIS &&
PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_SIS_755 &&
PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_SIS_760)
return (1);
return (0);
}
void
agp_sis_attach(struct device *parent, struct device *self, void *aux)
{
struct agp_sis_softc *ssc = (struct agp_sis_softc *)self;
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
struct agp_gatt *gatt;
pcireg_t reg;
if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, AGP_APBASE,
PCI_MAPREG_TYPE_MEM, &ssc->ssc_apaddr, NULL, NULL) != 0) {
printf(": can't get aperture info\n");
return;
}
ssc->ssc_pc = pa->pa_pc;
ssc->ssc_tag = pa->pa_tag;
ssc->ssc_apsize = agp_sis_get_aperture(ssc);
for (;;) {
gatt = agp_alloc_gatt(pa->pa_dmat, ssc->ssc_apsize);
if (gatt != NULL)
break;
/*
* Probably failed to alloc congigious memory. Try reducing the
* aperture so that the gatt size reduces.
*/
ssc->ssc_apsize /= 2;
if (agp_sis_set_aperture(ssc, ssc->ssc_apsize)) {
printf("can't set aperture size\n");
return;
}
}
ssc->gatt = gatt;
/* Install the gatt. */
pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_ATTBASE,
gatt->ag_physical);
/* Enable the aperture and auto-tlb-inval */
reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL);
reg |= (0x05 << 24) | 3;
pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL, reg);
ssc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_sis_methods,
ssc->ssc_apaddr, ssc->ssc_apsize, &ssc->dev);
return;
}
#if 0
int
agp_sis_detach(struct agp_softc *sc)
{
struct agp_sis_softc *ssc = sc->sc_chipc;
pcireg_t reg;
int error;
error = agp_generic_detach(sc);
if (error)
return (error);
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_SIS_WINCTRL);
reg &= ~3;
reg &= 0x00ffffff;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_SIS_WINCTRL, reg);
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(sc, ssc->initial_aperture);
agp_free_gatt(sc, ssc->gatt);
return (0);
}
#endif
bus_size_t
agp_sis_get_aperture(void *sc)
{
struct agp_sis_softc *ssc = sc;
int gws;
/*
* The aperture size is equal to 4M<<gws.
*/
gws = (pci_conf_read(ssc->ssc_pc, ssc->ssc_tag,
AGP_SIS_WINCTRL)&0x70) >> 4;
return ((4 * 1024 * 1024) << gws);
}
int
agp_sis_set_aperture(void *sc, bus_size_t aperture)
{
struct agp_sis_softc *ssc = sc;
int gws;
pcireg_t reg;
/*
* Check for a power of two and make sure its within the
* programmable range.
*/
if (aperture & (aperture - 1)
|| aperture < 4*1024*1024
|| aperture > 256*1024*1024)
return (EINVAL);
gws = ffs(aperture / 4*1024*1024) - 1;
reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL);
reg &= ~0x00000070;
reg |= gws << 4;
pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL, reg);
return (0);
}
void
agp_sis_bind_page(void *sc, bus_addr_t offset, paddr_t physical, int flags)
{
struct agp_sis_softc *ssc = sc;
ssc->gatt->ag_virtual[(offset - ssc->ssc_apaddr) >> AGP_PAGE_SHIFT] =
physical;
}
void
agp_sis_unbind_page(void *sc, bus_addr_t offset)
{
struct agp_sis_softc *ssc = sc;
ssc->gatt->ag_virtual[(offset - ssc->ssc_apaddr) >> AGP_PAGE_SHIFT] = 0;
}
void
agp_sis_flush_tlb(void *sc)
{
struct agp_sis_softc *ssc = sc;
pcireg_t reg;
reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_TLBFLUSH);
reg &= 0xffffff00;
reg |= 0x02;
pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_TLBFLUSH, reg);
}