FreeBSD-5.3/sys/pci/agp_ali.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_ali.c,v 1.12 2004/05/30 20:00:40 phk Exp $");
#include "opt_bus.h"
#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>
struct agp_ali_softc {
struct agp_softc agp;
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
};
static const char*
agp_ali_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 0x154110b9:
return ("Ali M1541 host to AGP bridge");
};
if (pci_get_vendor(dev) == 0x10b9)
return ("Ali Generic host to PCI bridge");
return NULL;
}
static int
agp_ali_probe(device_t dev)
{
const char *desc;
if (resource_disabled("agp", device_get_unit(dev)))
return (ENXIO);
desc = agp_ali_match(dev);
if (desc) {
device_verbose(dev);
device_set_desc(dev, desc);
return 0;
}
return ENXIO;
}
static int
agp_ali_attach(device_t dev)
{
struct agp_ali_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);
if (sc->initial_aperture == 0) {
device_printf(dev, "bad initial aperture size, disabling\n");
return ENXIO;
}
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_ALI_ATTBASE,
(gatt->ag_physical
| (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
4);
/* Enable the TLB. */
pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
return 0;
}
static int
agp_ali_detach(device_t dev)
{
struct agp_ali_softc *sc = device_get_softc(dev);
int error;
error = agp_generic_detach(dev);
if (error)
return error;
/* Disable the TLB.. */
pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(dev, sc->initial_aperture);
pci_write_config(dev, AGP_ALI_ATTBASE,
pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
4);
agp_free_gatt(sc->gatt);
return 0;
}
#define M 1024*1024
static u_int32_t agp_ali_table[] = {
0, /* 0 - invalid */
1, /* 1 - invalid */
2, /* 2 - invalid */
4*M, /* 3 - invalid */
8*M, /* 4 - invalid */
0, /* 5 - invalid */
16*M, /* 6 - invalid */
32*M, /* 7 - invalid */
64*M, /* 8 - invalid */
128*M, /* 9 - invalid */
256*M, /* 10 - invalid */
};
#define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
static u_int32_t
agp_ali_get_aperture(device_t dev)
{
/*
* The aperture size is derived from the low bits of attbase.
* I'm not sure this is correct..
*/
int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
if (i >= agp_ali_table_size)
return 0;
return agp_ali_table[i];
}
static int
agp_ali_set_aperture(device_t dev, u_int32_t aperture)
{
int i;
for (i = 0; i < agp_ali_table_size; i++)
if (agp_ali_table[i] == aperture)
break;
if (i == agp_ali_table_size)
return EINVAL;
pci_write_config(dev, AGP_ALI_ATTBASE,
((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
| i), 4);
return 0;
}
static int
agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
{
struct agp_ali_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_ali_unbind_page(device_t dev, int offset)
{
struct agp_ali_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_ali_flush_tlb(device_t dev)
{
pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
}
static device_method_t agp_ali_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, agp_ali_probe),
DEVMETHOD(device_attach, agp_ali_attach),
DEVMETHOD(device_detach, agp_ali_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_ali_get_aperture),
DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
DEVMETHOD(agp_bind_page, agp_ali_bind_page),
DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
DEVMETHOD(agp_flush_tlb, agp_ali_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_ali_driver = {
"agp",
agp_ali_methods,
sizeof(struct agp_ali_softc),
};
static devclass_t agp_devclass;
DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
MODULE_DEPEND(agp_ali, pci, 1, 1, 1);