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freebsd/sys/pci/agp_intel.c
Eric Anholt 124cfec04a [1] Remove the generic bridge support from those drivers that had it. The 
generic bridge support was biting us more than it helped, whenever a new chipset
came out from a vendor and misprogramming it caused strange hangs or corruption.
[2] Add a large number of PCI IDs based on what the linux drivers support.
Note that the new PCI IDs haven't been tested, they're just *likely* to work.
In particular the VIA AGP 8x chipsets are concerning, due to lack of testing,
possible issues (kern/69953), and not having a nice "does this bridge say it
would do 8x" function.  However, this shouldn't make the situation worse, since
these chips would have probed in the past anyway.
2004-12-30 07:18:58 +00:00

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/*-
* 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("$FreeBSD$");
#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>
#define MAX_APSIZE 0x3f /* 256 MB */
struct agp_intel_softc {
struct agp_softc agp;
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
u_int aperture_mask;
};
static const char*
agp_intel_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)) {
/* Intel -- vendor 0x8086 */
case 0x71808086:
return ("Intel 82443LX (440 LX) host to PCI bridge");
case 0x71908086:
return ("Intel 82443BX (440 BX) host to PCI bridge");
case 0x71a08086:
return ("Intel 82443GX host to PCI bridge");
case 0x71a18086:
return ("Intel 82443GX host to AGP bridge");
case 0x11308086:
return ("Intel 82815 (i815 GMCH) host to PCI bridge");
case 0x25008086:
case 0x25018086:
return ("Intel 82820 host to AGP bridge");
case 0x35758086:
return ("Intel 82830 host to AGP bridge");
case 0x1a218086:
return ("Intel 82840 host to AGP bridge");
case 0x1a308086:
return ("Intel 82845 host to AGP bridge");
case 0x25308086:
return ("Intel 82850 host to AGP bridge");
case 0x33408086:
return ("Intel 82855 host to AGP bridge");
case 0x25318086:
return ("Intel 82860 host to AGP bridge");
case 0x25708086:
return ("Intel 82865 host to AGP bridge");
case 0x255d8086:
return ("Intel E7205 host to AGP bridge");
case 0x25788086:
return ("Intel 82875P host to AGP bridge");
case 0x25608086: /* i845G */
return ("Intel 82845G host to AGP bridge");
};
return NULL;
}
static int
agp_intel_probe(device_t dev)
{
const char *desc;
if (resource_disabled("agp", device_get_unit(dev)))
return (ENXIO);
desc = agp_intel_match(dev);
if (desc) {
device_verbose(dev);
device_set_desc(dev, desc);
return 0;
}
return ENXIO;
}
static int
agp_intel_attach(device_t dev)
{
struct agp_intel_softc *sc = device_get_softc(dev);
struct agp_gatt *gatt;
u_int32_t type = pci_get_devid(dev);
u_int32_t value;
int error;
error = agp_generic_attach(dev);
if (error)
return error;
/* Determine maximum supported aperture size. */
value = pci_read_config(dev, AGP_INTEL_APSIZE, 1);
pci_write_config(dev, AGP_INTEL_APSIZE, MAX_APSIZE, 1);
sc->aperture_mask = pci_read_config(dev, AGP_INTEL_APSIZE, 1) &
MAX_APSIZE;
pci_write_config(dev, AGP_INTEL_APSIZE, value, 1);
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_INTEL_ATTBASE, gatt->ag_physical, 4);
/* Enable the GLTB and setup the control register. */
switch (type) {
case 0x71908086: /* 440LX/EX */
pci_write_config(dev, AGP_INTEL_AGPCTRL, 0x2080, 4);
break;
case 0x71808086: /* 440BX */
/*
* XXX: Should be 0xa080? Bit 9 is undefined, and
* bit 13 being on and bit 15 being clear is illegal.
*/
pci_write_config(dev, AGP_INTEL_AGPCTRL, 0x2280, 4);
break;
default:
value = pci_read_config(dev, AGP_INTEL_AGPCTRL, 4);
pci_write_config(dev, AGP_INTEL_AGPCTRL, value | 0x80, 4);
}
/* Enable things, clear errors etc. */
switch (type) {
case 0x1a218086: /* i840 */
case 0x25308086: /* i850 */
case 0x25318086: /* i860 */
pci_write_config(dev, AGP_INTEL_MCHCFG,
(pci_read_config(dev, AGP_INTEL_MCHCFG, 2)
| (1 << 9)), 2);
break;
case 0x25008086: /* i820 */
case 0x25018086: /* i820 */
pci_write_config(dev, AGP_INTEL_I820_RDCR,
(pci_read_config(dev, AGP_INTEL_I820_RDCR, 1)
| (1 << 1)), 1);
break;
case 0x1a308086: /* i845 */
case 0x33408086: /* i855 */
case 0x255d8086: /* E7205 */
case 0x25708086: /* i865 */
case 0x25788086: /* i875P */
case 0x25608086: /* i845G */
pci_write_config(dev, AGP_INTEL_I845_MCHCFG,
(pci_read_config(dev, AGP_INTEL_I845_MCHCFG, 1)
| (1 << 1)), 1);
break;
default: /* Intel Generic (maybe) */
pci_write_config(dev, AGP_INTEL_NBXCFG,
(pci_read_config(dev, AGP_INTEL_NBXCFG, 4)
& ~(1 << 10)) | (1 << 9), 4);
}
switch (type) {
case 0x1a218086: /* i840 */
pci_write_config(dev, AGP_INTEL_I8XX_ERRSTS, 0xc000, 2);
break;
case 0x25008086: /* i820 */
case 0x25018086: /* i820 */
case 0x1a308086: /* i845 */
case 0x25308086: /* i850 */
case 0x33408086: /* i855 */
case 0x255d8086: /* E7205 */
case 0x25318086: /* i860 */
case 0x25708086: /* i865 */
case 0x25788086: /* i875P */
case 0x25608086: /* i845G */
pci_write_config(dev, AGP_INTEL_I8XX_ERRSTS, 0x00ff, 2);
break;
default: /* Intel Generic (maybe) */
pci_write_config(dev, AGP_INTEL_ERRSTS + 1, 7, 1);
}
return 0;
}
static int
agp_intel_detach(device_t dev)
{
struct agp_intel_softc *sc = device_get_softc(dev);
u_int32_t type = pci_get_devid(dev);
int error;
error = agp_generic_detach(dev);
if (error)
return error;
switch (type) {
case 0x1a218086: /* i840 */
case 0x25308086: /* i850 */
case 0x25318086: /* i860 */
printf("%s: set MCHCFG to %x\n", __func__, (unsigned)
(pci_read_config(dev, AGP_INTEL_MCHCFG, 2)
& ~(1 << 9)));
pci_write_config(dev, AGP_INTEL_MCHCFG,
(pci_read_config(dev, AGP_INTEL_MCHCFG, 2)
& ~(1 << 9)), 2);
case 0x25008086: /* i820 */
case 0x25018086: /* i820 */
printf("%s: set RDCR to %x\n", __func__, (unsigned)
(pci_read_config(dev, AGP_INTEL_I820_RDCR, 1)
& ~(1 << 1)));
pci_write_config(dev, AGP_INTEL_I820_RDCR,
(pci_read_config(dev, AGP_INTEL_I820_RDCR, 1)
& ~(1 << 1)), 1);
case 0x1a308086: /* i845 */
case 0x25608086: /* i845G */
case 0x33408086: /* i855 */
case 0x255d8086: /* E7205 */
case 0x25708086: /* i865 */
case 0x25788086: /* i875P */
printf("%s: set MCHCFG to %x\n", __func__, (unsigned)
(pci_read_config(dev, AGP_INTEL_I845_MCHCFG, 1)
& ~(1 << 1)));
pci_write_config(dev, AGP_INTEL_MCHCFG,
(pci_read_config(dev, AGP_INTEL_I845_MCHCFG, 1)
& ~(1 << 1)), 1);
default: /* Intel Generic (maybe) */
printf("%s: set NBXCFG to %x\n", __func__,
(pci_read_config(dev, AGP_INTEL_NBXCFG, 4)
& ~(1 << 9)));
pci_write_config(dev, AGP_INTEL_NBXCFG,
(pci_read_config(dev, AGP_INTEL_NBXCFG, 4)
& ~(1 << 9)), 4);
}
pci_write_config(dev, AGP_INTEL_ATTBASE, 0, 4);
AGP_SET_APERTURE(dev, sc->initial_aperture);
agp_free_gatt(sc->gatt);
return 0;
}
static u_int32_t
agp_intel_get_aperture(device_t dev)
{
struct agp_intel_softc *sc = device_get_softc(dev);
u_int32_t apsize;
apsize = pci_read_config(dev, AGP_INTEL_APSIZE, 1) & sc->aperture_mask;
/*
* The size is determined by the number of low bits of
* register APBASE which are forced to zero. The low 22 bits
* are always forced to zero and each zero bit in the apsize
* field just read forces the corresponding bit in the 27:22
* to be zero. We calculate the aperture size accordingly.
*/
return (((apsize ^ sc->aperture_mask) << 22) | ((1 << 22) - 1)) + 1;
}
static int
agp_intel_set_aperture(device_t dev, u_int32_t aperture)
{
struct agp_intel_softc *sc = device_get_softc(dev);
u_int32_t apsize;
/*
* Reverse the magic from get_aperture.
*/
apsize = ((aperture - 1) >> 22) ^ sc->aperture_mask;
/*
* Double check for sanity.
*/
if ((((apsize ^ sc->aperture_mask) << 22) | ((1 << 22) - 1)) + 1 != aperture)
return EINVAL;
pci_write_config(dev, AGP_INTEL_APSIZE, apsize, 1);
return 0;
}
static int
agp_intel_bind_page(device_t dev, int offset, vm_offset_t physical)
{
struct agp_intel_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 | 0x17;
return 0;
}
static int
agp_intel_unbind_page(device_t dev, int offset)
{
struct agp_intel_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_intel_flush_tlb(device_t dev)
{
u_int32_t val;
val = pci_read_config(dev, AGP_INTEL_AGPCTRL, 4);
pci_write_config(dev, AGP_INTEL_AGPCTRL, val & ~(1 << 7), 4);
pci_write_config(dev, AGP_INTEL_AGPCTRL, val, 4);
}
static device_method_t agp_intel_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, agp_intel_probe),
DEVMETHOD(device_attach, agp_intel_attach),
DEVMETHOD(device_detach, agp_intel_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_intel_get_aperture),
DEVMETHOD(agp_set_aperture, agp_intel_set_aperture),
DEVMETHOD(agp_bind_page, agp_intel_bind_page),
DEVMETHOD(agp_unbind_page, agp_intel_unbind_page),
DEVMETHOD(agp_flush_tlb, agp_intel_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_intel_driver = {
"agp",
agp_intel_methods,
sizeof(struct agp_intel_softc),
};
static devclass_t agp_devclass;
DRIVER_MODULE(agp_intel, pci, agp_intel_driver, agp_devclass, 0, 0);
MODULE_DEPEND(agp_intel, agp, 1, 1, 1);
MODULE_DEPEND(agp_intel, pci, 1, 1, 1);
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