a3f0842419
vm_mtx does not recurse and is required for most low level vm operations. faults can not be taken without holding Giant. Memory subsystems can now call the base page allocators safely. Almost all atomic ops were removed as they are covered under the vm mutex. Alpha and ia64 now need to catch up to i386's trap handlers. FFS and NFS have been tested, other filesystems will need minor changes (grabbing the vm lock when twiddling page properties). Reviewed (partially) by: jake, jhb
255 lines
6.3 KiB
C
255 lines
6.3 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 <sys/mutex.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_via_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_via_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 0x05011106:
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return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
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case 0x05971106:
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return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
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case 0x05981106:
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return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
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case 0x06911106:
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return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
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};
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if (pci_get_vendor(dev) == 0x1106)
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return ("VIA 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_via_probe(device_t dev)
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{
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const char *desc;
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desc = agp_via_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_via_attach(device_t dev)
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{
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struct agp_via_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_VIA_ATTBASE, gatt->ag_physical | 3, 4);
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/* Enable the aperture. */
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pci_write_config(dev, AGP_VIA_GARTCTRL, 0x0f, 4);
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return 0;
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}
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static int
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agp_via_detach(device_t dev)
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{
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struct agp_via_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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pci_write_config(dev, AGP_VIA_GARTCTRL, 0, 4);
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pci_write_config(dev, AGP_VIA_ATTBASE, 0, 4);
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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_via_get_aperture(device_t dev)
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{
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u_int32_t apsize;
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apsize = pci_read_config(dev, AGP_VIA_APSIZE, 1) & 0x1f;
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/*
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* The size is determined by the number of low bits of
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* register APBASE which are forced to zero. The low 20 bits
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* are always forced to zero and each zero bit in the apsize
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* field just read forces the corresponding bit in the 27:20
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* to be zero. We calculate the aperture size accordingly.
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*/
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return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
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}
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static int
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agp_via_set_aperture(device_t dev, u_int32_t aperture)
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{
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u_int32_t apsize;
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/*
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* Reverse the magic from get_aperture.
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*/
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apsize = ((aperture - 1) >> 20) ^ 0xff;
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/*
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* Double check for sanity.
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*/
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if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
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return EINVAL;
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pci_write_config(dev, AGP_VIA_APSIZE, apsize, 1);
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return 0;
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}
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static int
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agp_via_bind_page(device_t dev, int offset, vm_offset_t physical)
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{
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struct agp_via_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_via_unbind_page(device_t dev, int offset)
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{
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struct agp_via_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_via_flush_tlb(device_t dev)
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{
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pci_write_config(dev, AGP_VIA_GARTCTRL, 0x8f, 4);
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pci_write_config(dev, AGP_VIA_GARTCTRL, 0x0f, 4);
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}
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static device_method_t agp_via_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, agp_via_probe),
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DEVMETHOD(device_attach, agp_via_attach),
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DEVMETHOD(device_detach, agp_via_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_via_get_aperture),
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DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
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DEVMETHOD(agp_bind_page, agp_via_bind_page),
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DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
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DEVMETHOD(agp_flush_tlb, agp_via_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_via_driver = {
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"agp",
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agp_via_methods,
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sizeof(struct agp_via_softc),
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};
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static devclass_t agp_devclass;
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DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0);
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