very experimental Apple UniNorth AGP support
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macallan
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196
sys/dev/pci/agp_apple.c
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196
sys/dev/pci/agp_apple.c
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/* $NetBSD: agp_apple.c,v 1.1 2007/03/25 23:31:51 macallan Exp $ */
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/*-
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* Copyright (c) 2007 Michael Lorenz
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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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* 3. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: agp_apple.c,v 1.1 2007/03/25 23:31:51 macallan Exp $");
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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/lock.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/agpio.h>
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#include <uvm/uvm_extern.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/agpvar.h>
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#include <dev/pci/agpreg.h>
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#include <machine/bus.h>
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static u_int32_t agp_apple_get_aperture(struct agp_softc *);
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static int agp_apple_set_aperture(struct agp_softc *, u_int32_t);
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static int agp_apple_bind_page(struct agp_softc *, off_t, bus_addr_t);
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static int agp_apple_unbind_page(struct agp_softc *, off_t);
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static void agp_apple_flush_tlb(struct agp_softc *);
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static struct agp_methods agp_apple_methods = {
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agp_apple_get_aperture,
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agp_apple_set_aperture,
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agp_apple_bind_page,
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agp_apple_unbind_page,
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agp_apple_flush_tlb,
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agp_generic_enable,
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agp_generic_alloc_memory,
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agp_generic_free_memory,
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agp_generic_bind_memory,
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agp_generic_unbind_memory,
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};
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struct agp_apple_softc {
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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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int
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agp_apple_attach(struct device *parent, struct device *self, void *aux)
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{
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struct pci_attach_args *pa = aux;
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struct agp_softc *sc = (void *)self;
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struct agp_apple_softc *asc;
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struct agp_gatt *gatt;
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asc = malloc(sizeof *asc, M_AGP, M_NOWAIT|M_ZERO);
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if (asc == NULL) {
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aprint_error(": can't allocate chipset-specific softc\n");
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return ENOMEM;
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}
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sc->as_chipc = asc;
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sc->as_methods = &agp_apple_methods;
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pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff,
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NULL);
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sc->as_apaddr = 0;
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sc->as_apsize = 8 * 1024 * 1024;
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sc->as_apflags = 0;
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sc->as_pc = pa->pa_pc;
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sc->as_tag = pa->pa_tag;
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sc->as_apt = pa->pa_memt;
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asc->initial_aperture = sc->as_apsize;
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for (;;) {
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gatt = agp_alloc_gatt(sc);
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if (gatt)
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break;
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sc->as_apsize = sc->as_apsize >> 1;
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if (sc->as_apsize == 0) {
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aprint_error(": can't set aperture size\n");
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return ENOMEM;
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}
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}
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asc->gatt = gatt;
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/* Install the gatt. */
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aprint_error("gatt: %08x %d MB\n", gatt->ag_physical, sc->as_apsize >> 20);
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pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_BASE,
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(gatt->ag_physical & 0xfffff000) |
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(sc->as_apsize >> 22));
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/* Enable the aperture. */
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pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
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APPLE_GART_EN);
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pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
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APPLE_GART_EN | APPLE_GART_INV);
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pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
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APPLE_GART_EN);
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return 0;
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}
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static u_int32_t
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agp_apple_get_aperture(struct agp_softc *sc)
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{
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#if 0
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u_int32_t apsize = 0;
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aprint_error("%s: ", __func__);
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apsize = pci_conf_read(sc->as_pc, sc->as_tag,
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APPLE_UNINORTH_GART_BASE) & 0x0000ffff;
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aprint_error("%08x\n", apsize);
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return (apsize << 22);
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#else
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return sc->as_apsize;
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#endif
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}
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static int
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agp_apple_set_aperture(struct agp_softc *sc, u_int32_t aperture)
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{
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pcireg_t reg;
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aprint_error("%s: %08x\n", __func__, aperture);
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reg = pci_conf_read(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE)
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& 0xfffff000;
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reg |= ((aperture >> 22) & 0xfff);
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pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE, reg);
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sc->as_apsize = aperture;
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return 0;
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}
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static int
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agp_apple_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical)
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{
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struct agp_apple_softc *asc = sc->as_chipc;
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if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
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return EINVAL;
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asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = htole32(physical);
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return 0;
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}
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static int
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agp_apple_unbind_page(struct agp_softc *sc, off_t offset)
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{
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struct agp_apple_softc *asc = sc->as_chipc;
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if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
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return EINVAL;
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asc->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_apple_flush_tlb(struct agp_softc *sc)
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{
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pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
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APPLE_GART_EN);
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pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
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APPLE_GART_EN | APPLE_GART_INV);
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pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
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APPLE_GART_EN);
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}
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