255 lines
6.6 KiB
C
255 lines
6.6 KiB
C
/* $NetBSD: agp_ali.c,v 1.15 2008/06/09 06:49:54 freza Exp $ */
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/*-
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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: src/sys/pci/agp_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: agp_ali.c,v 1.15 2008/06/09 06:49:54 freza Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/systm.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 <sys/bus.h>
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struct agp_ali_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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static u_int32_t agp_ali_get_aperture(struct agp_softc *);
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static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t);
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static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t);
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static int agp_ali_unbind_page(struct agp_softc *, off_t);
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static void agp_ali_flush_tlb(struct agp_softc *);
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static struct agp_methods agp_ali_methods = {
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agp_ali_get_aperture,
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agp_ali_set_aperture,
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agp_ali_bind_page,
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agp_ali_unbind_page,
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agp_ali_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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int
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agp_ali_attach(device_t parent, device_t self, void *aux)
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{
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struct agp_softc *sc = device_private(self);
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struct agp_ali_softc *asc;
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struct pci_attach_args *pa = aux;
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struct agp_gatt *gatt;
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pcireg_t reg;
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asc = malloc(sizeof *asc, M_AGP, M_NOWAIT);
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if (asc == NULL) {
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aprint_error(": failed to allocate 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_ali_methods;
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if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) {
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aprint_error(": failed to map aperture\n");
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free(asc, M_AGP);
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return ENXIO;
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}
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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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asc->initial_aperture = agp_ali_get_aperture(sc);
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for (;;) {
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gatt = agp_alloc_gatt(sc);
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if (gatt != NULL)
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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(sc, AGP_GET_APERTURE(sc) / 2)) {
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agp_generic_detach(sc);
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aprint_error(": failed to set aperture\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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reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE);
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reg = (reg & 0xfff) | (gatt->ag_physical & ~0xfff);
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pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg);
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/* Enable the TLB. */
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reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL);
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reg = (reg & ~0xff) | 0x10;
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pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg);
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return 0;
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}
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#if 0
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static int
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agp_ali_detach(struct agp_softc *sc)
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{
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int error;
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pcireg_t reg;
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struct agp_ali_softc *asc = sc->as_chipc;
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error = agp_generic_detach(sc);
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if (error)
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return error;
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/* Disable the TLB.. */
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reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL);
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reg &= ~0xff;
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reg |= 0x90;
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pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
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/* Put the aperture back the way it started. */
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AGP_SET_APERTURE(sc, asc->initial_aperture);
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reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE);
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reg &= 0xf;
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pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg);
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agp_free_gatt(sc, asc->gatt);
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return 0;
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}
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#endif
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#define M 1024*1024
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static const u_int32_t agp_ali_table[] = {
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0, /* 0 - invalid */
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1, /* 1 - invalid */
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2, /* 2 - invalid */
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4*M, /* 3 */
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8*M, /* 4 */
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0, /* 5 - Reserved */
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16*M, /* 6 */
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32*M, /* 7 */
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64*M, /* 8 */
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128*M, /* 9 */
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256*M, /* 10 */
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};
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#define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
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static u_int32_t
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agp_ali_get_aperture(struct agp_softc *sc)
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{
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int i;
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/*
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* The aperture size is derived from the low bits of attbase.
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* I'm not sure this is correct..
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*/
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i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xf;
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if (i >= agp_ali_table_size)
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return 0;
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return agp_ali_table[i];
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}
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static int
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agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture)
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{
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int i;
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pcireg_t reg;
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if (aperture & (aperture - 1) || aperture < 1*M)
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return EINVAL;
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for (i = 0; i < agp_ali_table_size; i++)
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if (agp_ali_table[i] == aperture)
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break;
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if (i == agp_ali_table_size)
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return EINVAL;
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reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE);
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reg &= ~0xf;
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reg |= i;
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pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg);
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return 0;
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}
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static int
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agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical)
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{
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struct agp_ali_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] = physical;
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return 0;
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}
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static int
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agp_ali_unbind_page(struct agp_softc *sc, off_t offset)
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{
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struct agp_ali_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_ali_flush_tlb(struct agp_softc *sc)
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{
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pcireg_t reg;
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reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL);
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reg &= ~0xff;
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reg |= 0x90;
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pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
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reg &= ~0xff;
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reg |= 0x10;
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pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
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}
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