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/* $OpenBSD: agp_sis.c,v 1.1 2002/07/12 20:17:03 mickey 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/vga_pcivar.h>
#include <dev/pci/agpvar.h>
#include <dev/pci/agpreg.h>
#include <machine/bus.h>
struct agp_sis_softc {
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
};
static u_int32_t agp_sis_get_aperture(struct vga_pci_softc *);
static int agp_sis_set_aperture(struct vga_pci_softc *, u_int32_t);
static int agp_sis_bind_page(struct vga_pci_softc *, off_t, bus_addr_t);
static int agp_sis_unbind_page(struct vga_pci_softc *, off_t);
static void agp_sis_flush_tlb(struct vga_pci_softc *);
struct agp_methods agp_sis_methods = {
agp_sis_get_aperture,
agp_sis_set_aperture,
agp_sis_bind_page,
agp_sis_unbind_page,
agp_sis_flush_tlb,
agp_generic_enable,
agp_generic_alloc_memory,
agp_generic_free_memory,
agp_generic_bind_memory,
agp_generic_unbind_memory,
};
int
agp_sis_attach(struct vga_pci_softc *sc, struct pci_attach_args *pa, struct pci_attach_args *pchb_pa)
{
struct agp_sis_softc *ssc;
struct agp_gatt *gatt;
pcireg_t reg;
ssc = malloc(sizeof *ssc, M_DEVBUF, M_NOWAIT);
if (ssc == NULL) {
printf(": can't allocate chipset-specific softc\n");
return ENOMEM;
}
sc->sc_methods = &agp_sis_methods;
sc->sc_chipc = ssc;
if (agp_map_aperture(sc) != 0) {
printf(": can't map aperture\n");
free(ssc, M_DEVBUF);
return ENXIO;
}
ssc->initial_aperture = AGP_GET_APERTURE(sc);
for (;;) {
gatt = agp_alloc_gatt(sc);
if (gatt)
break;
/*
* Probably contigmalloc failure. Try reducing the
* aperture so that the gatt size reduces.
*/
if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) {
agp_generic_detach(sc);
printf(": failed to set aperture\n");
return ENOMEM;
}
}
ssc->gatt = gatt;
/* Install the gatt. */
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_SIS_ATTBASE,
gatt->ag_physical);
/* Enable the aperture and auto-tlb-inval */
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_SIS_WINCTRL);
reg |= (0x05 << 24) | 3;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_SIS_WINCTRL, reg);
return 0;
}
#if 0
static int
agp_sis_detach(struct vga_pci_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
static u_int32_t
agp_sis_get_aperture(struct vga_pci_softc *sc)
{
int gws;
/*
* The aperture size is equal to 4M<<gws.
*/
gws = (pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_SIS_WINCTRL)&0x70) >> 4;
return (4*1024*1024) << gws;
}
static int
agp_sis_set_aperture(struct vga_pci_softc *sc, u_int32_t aperture)
{
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(sc->sc_pc, sc->sc_pcitag, AGP_SIS_WINCTRL);
reg &= ~0x00000070;
reg |= gws << 4;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_SIS_WINCTRL, reg);
return 0;
}
static int
agp_sis_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t physical)
{
struct agp_sis_softc *ssc = sc->sc_chipc;
if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
return 0;
}
static int
agp_sis_unbind_page(struct vga_pci_softc *sc, off_t offset)
{
struct agp_sis_softc *ssc = sc->sc_chipc;
if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
return 0;
}
static void
agp_sis_flush_tlb(struct vga_pci_softc *sc)
{
pcireg_t reg;
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_SIS_TLBFLUSH);
reg &= 0xffffff00;
reg |= 0x02;
pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_SIS_TLBFLUSH, reg);
}
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