300 lines
7.7 KiB
C
300 lines
7.7 KiB
C
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/*-
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* Copyright (c) 2010 Nathan Whitehorn
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_bus.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/module.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 <sys/proc.h>
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#include <machine/resource.h>
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#include <dev/agp/agppriv.h>
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#include <dev/agp/agpreg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.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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#define UNIN_AGP_GART_BASE 0x8c
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#define UNIN_AGP_BASE_ADDR 0x90
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#define UNIN_AGP_GART_CONTROL 0x94
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#define UNIN_AGP_GART_INVAL 0x00000001
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#define UNIN_AGP_GART_ENABLE 0x00000100
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#define UNIN_AGP_GART_2XRESET 0x00010000
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#define UNIN_AGP_U3_GART_PERFRD 0x00080000
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struct agp_apple_softc {
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struct agp_softc agp;
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uint32_t aperture;
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struct agp_gatt *gatt;
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int u3;
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int needs_2x_reset;
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};
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static int
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agp_apple_probe(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 (ENXIO);
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if (agp_find_caps(dev) == 0)
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return (ENXIO);
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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 (ENXIO);
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switch (pci_get_devid(dev)) {
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case 0x0020106b:
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case 0x0027106b:
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device_set_desc(dev, "Apple UniNorth AGP Bridge");
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return (BUS_PROBE_DEFAULT);
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case 0x002d106b:
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device_set_desc(dev, "Apple UniNorth 1.5 AGP Bridge");
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return (BUS_PROBE_DEFAULT);
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case 0x0034106b:
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device_set_desc(dev, "Apple UniNorth 2 AGP Bridge");
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return (BUS_PROBE_DEFAULT);
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case 0x004b106b:
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case 0x0058106b:
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case 0x0059106b:
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device_set_desc(dev, "Apple U3 AGP Bridge");
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return (BUS_PROBE_DEFAULT);
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case 0x0066106b:
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device_set_desc(dev, "Apple Intrepid AGP Bridge");
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return (BUS_PROBE_DEFAULT);
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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_apple_attach(device_t dev)
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{
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struct agp_apple_softc *sc = device_get_softc(dev);
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int error;
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/* Record quirks */
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sc->needs_2x_reset = 0;
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sc->u3 = 0;
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switch (pci_get_devid(dev)) {
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case 0x0020106b:
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case 0x0027106b:
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sc->needs_2x_reset = 1;
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break;
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case 0x004b106b:
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case 0x0058106b:
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case 0x0059106b:
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sc->u3 = 1;
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break;
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}
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/* Set the aperture bus address base (must be 0) */
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pci_write_config(dev, UNIN_AGP_BASE_ADDR, 0, 4);
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agp_set_aperture_resource(dev, -1);
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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->aperture = 256*1024*1024;
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for (sc->aperture = 256*1024*1024; sc->aperture >= 4*1024*1024;
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sc->aperture /= 2) {
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sc->gatt = agp_alloc_gatt(dev);
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if (sc->gatt)
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break;
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}
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if (sc->aperture < 4*1024*1024) {
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agp_generic_detach(dev);
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return ENOMEM;
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}
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/* Install the gatt. */
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AGP_SET_APERTURE(dev, sc->aperture);
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/* XXX: U3 scratch page? */
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/* Enable the aperture and TLB. */
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AGP_FLUSH_TLB(dev);
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return (0);
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}
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static int
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agp_apple_detach(device_t dev)
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{
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struct agp_apple_softc *sc = device_get_softc(dev);
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agp_free_cdev(dev);
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/* Disable the aperture and TLB */
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pci_write_config(dev, UNIN_AGP_GART_CONTROL, UNIN_AGP_GART_INVAL, 4);
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pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
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if (sc->needs_2x_reset) {
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pci_write_config(dev, UNIN_AGP_GART_CONTROL,
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UNIN_AGP_GART_2XRESET, 4);
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pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
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}
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AGP_SET_APERTURE(dev, 0);
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agp_free_gatt(sc->gatt);
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agp_free_res(dev);
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return 0;
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}
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static uint32_t
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agp_apple_get_aperture(device_t dev)
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{
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struct agp_apple_softc *sc = device_get_softc(dev);
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return (sc->aperture);
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}
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static int
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agp_apple_set_aperture(device_t dev, uint32_t aperture)
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{
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struct agp_apple_softc *sc = device_get_softc(dev);
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/*
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* Check for a multiple of 4 MB and make sure it is within the
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* programmable range.
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*/
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if (aperture % (4*1024*1024)
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|| aperture < 4*1024*1024
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|| aperture > ((sc->u3) ? 512 : 256)*1024*1024)
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return EINVAL;
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/* The aperture value is a multiple of 4 MB */
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aperture /= (4*1024*1024);
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pci_write_config(dev, UNIN_AGP_GART_BASE,
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(sc->gatt->ag_physical & 0xfffff000) | aperture, 4);
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return (0);
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}
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static int
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agp_apple_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
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{
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struct agp_apple_softc *sc = device_get_softc(dev);
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if (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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__asm __volatile("dcbst 0,%0; sync" ::
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"r"(&sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT]) : "memory");
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return (0);
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}
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static int
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agp_apple_unbind_page(device_t dev, vm_offset_t offset)
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{
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struct agp_apple_softc *sc = device_get_softc(dev);
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if (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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__asm __volatile("dcbst 0,%0; sync" ::
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"r"(&sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT]) : "memory");
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return (0);
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}
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static void
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agp_apple_flush_tlb(device_t dev)
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{
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struct agp_apple_softc *sc = device_get_softc(dev);
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uint32_t cntrl = UNIN_AGP_GART_ENABLE;
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if (sc->u3)
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cntrl |= UNIN_AGP_U3_GART_PERFRD;
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pci_write_config(dev, UNIN_AGP_GART_CONTROL,
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cntrl | UNIN_AGP_GART_INVAL, 4);
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pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
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if (sc->needs_2x_reset) {
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pci_write_config(dev, UNIN_AGP_GART_CONTROL,
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cntrl | UNIN_AGP_GART_2XRESET, 4);
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pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
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}
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}
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static device_method_t agp_apple_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, agp_apple_probe),
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DEVMETHOD(device_attach, agp_apple_attach),
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DEVMETHOD(device_detach, agp_apple_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_apple_get_aperture),
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DEVMETHOD(agp_set_aperture, agp_apple_set_aperture),
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DEVMETHOD(agp_bind_page, agp_apple_bind_page),
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DEVMETHOD(agp_unbind_page, agp_apple_unbind_page),
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DEVMETHOD(agp_flush_tlb, agp_apple_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_apple_driver = {
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"agp",
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agp_apple_methods,
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sizeof(struct agp_apple_softc),
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};
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static devclass_t agp_devclass;
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DRIVER_MODULE(agp_apple, hostb, agp_apple_driver, agp_devclass, 0, 0);
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MODULE_DEPEND(agp_apple, agp, 1, 1, 1);
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MODULE_DEPEND(agp_apple, pci, 1, 1, 1);
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