ab33dfac01
tested on Intel BX chipsets only. The other agp minidrivers are totally untested. The programming api is a subset of the Linux api and is only intended to be enough for the X server to use. There is also an in-kernel api for the use of other kernel modules such as the 3D DRI.
257 lines
6.1 KiB
C
257 lines
6.1 KiB
C
/*-
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* Copyright (c) 2000 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_bus.h"
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#include "opt_pci.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/lock.h>
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#include <pci/pcivar.h>
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#include <pci/pcireg.h>
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#include <pci/agppriv.h>
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#include <pci/agpreg.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/pmap.h>
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struct agp_sis_softc {
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struct agp_softc agp;
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u_int32_t initial_aperture; /* aperture size at startup */
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struct agp_gatt *gatt;
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};
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static const char*
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agp_sis_match(device_t dev)
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{
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if (pci_get_class(dev) != PCIC_BRIDGE
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|| pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
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return NULL;
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if (agp_find_caps(dev) == 0)
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return NULL;
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switch (pci_get_devid(dev)) {
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case 0x00011039:
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return ("SiS 5591 host to AGP bridge");
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};
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if (pci_get_vendor(dev) == 0x1039)
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return ("SIS Generic host to PCI bridge");
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return NULL;
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}
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static int
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agp_sis_probe(device_t dev)
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{
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const char *desc;
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desc = agp_sis_match(dev);
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if (desc) {
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device_verbose(dev);
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device_set_desc(dev, desc);
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return 0;
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}
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return ENXIO;
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}
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static int
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agp_sis_attach(device_t dev)
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{
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struct agp_sis_softc *sc = device_get_softc(dev);
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struct agp_gatt *gatt;
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int error;
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error = agp_generic_attach(dev);
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if (error)
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return error;
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sc->initial_aperture = AGP_GET_APERTURE(dev);
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for (;;) {
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gatt = agp_alloc_gatt(dev);
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if (gatt)
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break;
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/*
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* Probably contigmalloc failure. Try reducing the
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* aperture so that the gatt size reduces.
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*/
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if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
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agp_generic_detach(dev);
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return ENOMEM;
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}
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}
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sc->gatt = gatt;
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/* Install the gatt. */
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pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
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/* Enable the aperture. */
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pci_write_config(dev, AGP_SIS_WINCTRL,
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pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
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/*
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* Enable the TLB and make it automatically invalidate entries
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* when the GATT is written.
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*/
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pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
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return 0;
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}
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static int
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agp_sis_detach(device_t dev)
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{
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struct agp_sis_softc *sc = device_get_softc(dev);
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int error;
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error = agp_generic_detach(dev);
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if (error)
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return error;
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/* Disable the aperture.. */
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pci_write_config(dev, AGP_SIS_WINCTRL,
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pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
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/* and the TLB. */
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pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
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/* Put the aperture back the way it started. */
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AGP_SET_APERTURE(dev, sc->initial_aperture);
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agp_free_gatt(sc->gatt);
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return 0;
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}
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static u_int32_t
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agp_sis_get_aperture(device_t dev)
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{
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int gws;
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/*
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* The aperture size is equal to 4M<<gws.
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*/
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gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
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return (4*1024*1024) << gws;
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}
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static int
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agp_sis_set_aperture(device_t dev, u_int32_t aperture)
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{
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int gws;
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/*
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* Check for a power of two and make sure its within the
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* programmable range.
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*/
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if (aperture & (aperture - 1)
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|| aperture < 4*1024*1024
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|| aperture > 256*1024*1024)
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return EINVAL;
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gws = ffs(aperture / 4*1024*1024) - 1;
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pci_write_config(dev, AGP_SIS_WINCTRL,
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((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
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| gws << 4), 1);
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return 0;
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}
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static int
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agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
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{
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struct agp_sis_softc *sc = device_get_softc(dev);
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if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
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return EINVAL;
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sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
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return 0;
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}
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static int
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agp_sis_unbind_page(device_t dev, int offset)
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{
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struct agp_sis_softc *sc = device_get_softc(dev);
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if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
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return EINVAL;
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sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
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return 0;
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}
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static void
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agp_sis_flush_tlb(device_t dev)
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{
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pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
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}
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static device_method_t agp_sis_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, agp_sis_probe),
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DEVMETHOD(device_attach, agp_sis_attach),
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DEVMETHOD(device_detach, agp_sis_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* AGP interface */
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DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
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DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
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DEVMETHOD(agp_bind_page, agp_sis_bind_page),
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DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
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DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
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DEVMETHOD(agp_enable, agp_generic_enable),
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DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
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DEVMETHOD(agp_free_memory, agp_generic_free_memory),
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DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
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DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
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{ 0, 0 }
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};
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static driver_t agp_sis_driver = {
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"agp",
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agp_sis_methods,
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sizeof(struct agp_sis_softc),
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};
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static devclass_t agp_devclass;
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DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
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