freebsd-dev/sys/pci/agp_sis.c

259 lines
6.2 KiB
C
Raw Normal View History

/*-
* 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.
*
* $FreeBSD$
*/
#include "opt_bus.h"
#include "opt_pci.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <pci/agppriv.h>
#include <pci/agpreg.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/pmap.h>
struct agp_sis_softc {
struct agp_softc agp;
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
};
static const char*
agp_sis_match(device_t dev)
{
if (pci_get_class(dev) != PCIC_BRIDGE
|| pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
return NULL;
if (agp_find_caps(dev) == 0)
return NULL;
switch (pci_get_devid(dev)) {
case 0x00011039:
return ("SiS 5591 host to AGP bridge");
};
if (pci_get_vendor(dev) == 0x1039)
return ("SIS Generic host to PCI bridge");
return NULL;
}
static int
agp_sis_probe(device_t dev)
{
const char *desc;
desc = agp_sis_match(dev);
if (desc) {
device_verbose(dev);
device_set_desc(dev, desc);
return 0;
}
return ENXIO;
}
static int
agp_sis_attach(device_t dev)
{
struct agp_sis_softc *sc = device_get_softc(dev);
struct agp_gatt *gatt;
int error;
error = agp_generic_attach(dev);
if (error)
return error;
sc->initial_aperture = AGP_GET_APERTURE(dev);
for (;;) {
gatt = agp_alloc_gatt(dev);
if (gatt)
break;
/*
* Probably contigmalloc failure. Try reducing the
* aperture so that the gatt size reduces.
*/
if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
agp_generic_detach(dev);
return ENOMEM;
}
}
sc->gatt = gatt;
/* Install the gatt. */
pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
/* Enable the aperture. */
pci_write_config(dev, AGP_SIS_WINCTRL,
pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
/*
* Enable the TLB and make it automatically invalidate entries
* when the GATT is written.
*/
pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
return 0;
}
static int
agp_sis_detach(device_t dev)
{
struct agp_sis_softc *sc = device_get_softc(dev);
int error;
error = agp_generic_detach(dev);
if (error)
return error;
/* Disable the aperture.. */
pci_write_config(dev, AGP_SIS_WINCTRL,
pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
/* and the TLB. */
pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(dev, sc->initial_aperture);
agp_free_gatt(sc->gatt);
return 0;
}
static u_int32_t
agp_sis_get_aperture(device_t dev)
{
int gws;
/*
* The aperture size is equal to 4M<<gws.
*/
gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
return (4*1024*1024) << gws;
}
static int
agp_sis_set_aperture(device_t dev, u_int32_t aperture)
{
int gws;
/*
* 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;
pci_write_config(dev, AGP_SIS_WINCTRL,
((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
| gws << 4), 1);
return 0;
}
static int
agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
{
struct agp_sis_softc *sc = device_get_softc(dev);
if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
return 0;
}
static int
agp_sis_unbind_page(device_t dev, int offset)
{
struct agp_sis_softc *sc = device_get_softc(dev);
if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
return 0;
}
static void
agp_sis_flush_tlb(device_t dev)
{
pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
}
static device_method_t agp_sis_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, agp_sis_probe),
DEVMETHOD(device_attach, agp_sis_attach),
DEVMETHOD(device_detach, agp_sis_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* AGP interface */
DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
DEVMETHOD(agp_bind_page, agp_sis_bind_page),
DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
DEVMETHOD(agp_enable, agp_generic_enable),
DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
DEVMETHOD(agp_free_memory, agp_generic_free_memory),
DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
{ 0, 0 }
};
static driver_t agp_sis_driver = {
"agp",
agp_sis_methods,
sizeof(struct agp_sis_softc),
};
static devclass_t agp_devclass;
DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);