FreeBSD-5.3/sys/pci/agp_via.c
/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/pci/agp_via.c,v 1.18.2.1 2004/08/23 05:23:16 imp Exp $");
#include "opt_bus.h"
#ifndef PC98
#include "opt_agp.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <pci/agppriv.h>
#include <pci/agpreg.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/pmap.h>
#define REG_GARTCTRL 0
#define REG_APSIZE 1
#define REG_ATTBASE 2
struct agp_via_softc {
struct agp_softc agp;
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
int *regs;
};
static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
AGP_VIA_ATTBASE };
static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
AGP3_VIA_ATTBASE };
static const char*
agp_via_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 0x03051106:
return ("VIA 82C8363 (Apollo KT133A) host to PCI bridge");
case 0x05011106:
return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
case 0x05971106:
return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
case 0x05981106:
return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
case 0x06051106:
return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
case 0x06911106:
return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
case 0x31881106:
#if defined(__amd64__) || defined(AGP_AMD64_GART)
return NULL;
#else
return ("VIA 8385 host to PCI bridge");
#endif
case 0x31891106:
return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
};
if (pci_get_vendor(dev) == 0x1106)
return ("VIA Generic host to PCI bridge");
return NULL;
}
static int
agp_via_probe(device_t dev)
{
const char *desc;
if (resource_disabled("agp", device_get_unit(dev)))
return (ENXIO);
desc = agp_via_match(dev);
if (desc) {
device_verbose(dev);
device_set_desc(dev, desc);
return 0;
}
return ENXIO;
}
static int
agp_via_attach(device_t dev)
{
struct agp_via_softc *sc = device_get_softc(dev);
struct agp_gatt *gatt;
int error;
u_int32_t agpsel;
switch (pci_get_devid(dev)) {
#ifdef AGP_NO_AMD64_GART
case 0x31881106:
#endif
case 0x31891106:
/* The newer VIA chipsets will select the AGP version based on
* what AGP versions the card supports. We still have to
* program it using the v2 registers if it has chosen to use
* compatibility mode.
*/
agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
if ((agpsel & (1 << 1)) == 0)
sc->regs = via_v3_regs;
else
sc->regs = via_v2_regs;
break;
default:
sc->regs = via_v2_regs;
break;
}
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, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
/* Enable the aperture. */
pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
return 0;
}
static int
agp_via_detach(device_t dev)
{
struct agp_via_softc *sc = device_get_softc(dev);
int error;
error = agp_generic_detach(dev);
if (error)
return error;
pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
AGP_SET_APERTURE(dev, sc->initial_aperture);
agp_free_gatt(sc->gatt);
return 0;
}
static u_int32_t
agp_via_get_aperture(device_t dev)
{
struct agp_via_softc *sc = device_get_softc(dev);
u_int32_t apsize;
apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f;
/*
* The size is determined by the number of low bits of
* register APBASE which are forced to zero. The low 20 bits
* are always forced to zero and each zero bit in the apsize
* field just read forces the corresponding bit in the 27:20
* to be zero. We calculate the aperture size accordingly.
*/
return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
}
static int
agp_via_set_aperture(device_t dev, u_int32_t aperture)
{
struct agp_via_softc *sc = device_get_softc(dev);
u_int32_t apsize;
/*
* Reverse the magic from get_aperture.
*/
apsize = ((aperture - 1) >> 20) ^ 0xff;
/*
* Double check for sanity.
*/
if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
return EINVAL;
pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
return 0;
}
static int
agp_via_bind_page(device_t dev, int offset, vm_offset_t physical)
{
struct agp_via_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_via_unbind_page(device_t dev, int offset)
{
struct agp_via_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_via_flush_tlb(device_t dev)
{
struct agp_via_softc *sc = device_get_softc(dev);
pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
}
static device_method_t agp_via_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, agp_via_probe),
DEVMETHOD(device_attach, agp_via_attach),
DEVMETHOD(device_detach, agp_via_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_via_get_aperture),
DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
DEVMETHOD(agp_bind_page, agp_via_bind_page),
DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
DEVMETHOD(agp_flush_tlb, agp_via_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_via_driver = {
"agp",
agp_via_methods,
sizeof(struct agp_via_softc),
};
static devclass_t agp_devclass;
DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0);
MODULE_DEPEND(agp_via, agp, 1, 1, 1);
MODULE_DEPEND(agp_via, pci, 1, 1, 1);