255 lines
6.7 KiB
C
255 lines
6.7 KiB
C
/* $OpenBSD: agp_sis.c,v 1.20 2022/03/11 18:00:45 mpi Exp $ */
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/* $NetBSD: agp_sis.c,v 1.2 2001/09/15 00:25:00 thorpej 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_sis.c,v 1.3 2001/07/05 21:28:47 jhb Exp $
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*/
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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/device.h>
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#include <sys/rwlock.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/pcidevs.h>
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#include <dev/pci/vga_pcivar.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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struct agp_sis_softc {
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struct device dev;
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struct agp_softc *agpdev;
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struct agp_gatt *gatt;
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pci_chipset_tag_t ssc_pc;
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pcitag_t ssc_tag;
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bus_addr_t ssc_apaddr;
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bus_size_t ssc_apsize;
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pcireg_t ssc_winctrl; /* saved over suspend/resume */
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};
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void agp_sis_attach(struct device *, struct device *, void *);
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int agp_sis_activate(struct device *, int);
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void agp_sis_save(struct agp_sis_softc *);
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void agp_sis_restore(struct agp_sis_softc *);
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int agp_sis_probe(struct device *, void *, void *);
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bus_size_t agp_sis_get_aperture(void *);
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int agp_sis_set_aperture(void *, bus_size_t);
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void agp_sis_bind_page(void *, bus_addr_t, paddr_t, int);
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void agp_sis_unbind_page(void *, bus_addr_t);
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void agp_sis_flush_tlb(void *);
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const struct cfattach sisagp_ca = {
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sizeof(struct agp_sis_softc), agp_sis_probe, agp_sis_attach,
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NULL, agp_sis_activate
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};
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struct cfdriver sisagp_cd = {
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NULL, "sisagp", DV_DULL
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};
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const struct agp_methods agp_sis_methods = {
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agp_sis_bind_page,
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agp_sis_unbind_page,
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agp_sis_flush_tlb,
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};
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int
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agp_sis_probe(struct device *parent, void *match, void *aux)
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{
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struct agp_attach_args *aa = aux;
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struct pci_attach_args *pa = aa->aa_pa;
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/* Must be a pchb, don't attach to iommu-style agp devs */
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if (agpbus_probe(aa) == 1 && PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SIS &&
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PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_SIS_755 &&
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PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_SIS_760)
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return (1);
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return (0);
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}
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void
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agp_sis_attach(struct device *parent, struct device *self, void *aux)
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{
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struct agp_sis_softc *ssc = (struct agp_sis_softc *)self;
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struct agp_attach_args *aa = aux;
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struct pci_attach_args *pa = aa->aa_pa;
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struct agp_gatt *gatt;
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pcireg_t reg;
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if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, AGP_APBASE,
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PCI_MAPREG_TYPE_MEM, &ssc->ssc_apaddr, NULL, NULL) != 0) {
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printf(": can't get aperture info\n");
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return;
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}
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ssc->ssc_pc = pa->pa_pc;
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ssc->ssc_tag = pa->pa_tag;
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ssc->ssc_apsize = agp_sis_get_aperture(ssc);
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for (;;) {
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gatt = agp_alloc_gatt(pa->pa_dmat, ssc->ssc_apsize);
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if (gatt != NULL)
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break;
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/*
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* Probably failed to alloc contiguous memory. Try reducing the
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* aperture so that the gatt size reduces.
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*/
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ssc->ssc_apsize /= 2;
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if (agp_sis_set_aperture(ssc, ssc->ssc_apsize)) {
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printf("can't set aperture size\n");
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return;
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}
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}
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ssc->gatt = gatt;
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/* Install the gatt. */
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pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_ATTBASE,
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gatt->ag_physical);
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/* Enable the aperture and auto-tlb-inval */
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reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL);
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reg |= (0x05 << 24) | 3;
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pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL, reg);
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ssc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_sis_methods,
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ssc->ssc_apaddr, ssc->ssc_apsize, &ssc->dev);
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return;
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}
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int
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agp_sis_activate(struct device *arg, int act)
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{
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struct agp_sis_softc *ssc = (struct agp_sis_softc *)arg;
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switch (act) {
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case DVACT_SUSPEND:
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agp_sis_save(ssc);
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break;
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case DVACT_RESUME:
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agp_sis_restore(ssc);
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break;
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}
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return (0);
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}
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void
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agp_sis_save(struct agp_sis_softc *ssc)
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{
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ssc->ssc_winctrl = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag,
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AGP_SIS_WINCTRL);
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}
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void
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agp_sis_restore(struct agp_sis_softc *ssc)
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{
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/* Install the gatt. */
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pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_ATTBASE,
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ssc->gatt->ag_physical);
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/*
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* Enable the aperture, reset the aperture size and enable and
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* auto-tlb-inval.
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*/
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pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL,
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ssc->ssc_winctrl);
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}
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bus_size_t
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agp_sis_get_aperture(void *sc)
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{
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struct agp_sis_softc *ssc = sc;
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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_conf_read(ssc->ssc_pc, ssc->ssc_tag,
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AGP_SIS_WINCTRL)&0x70) >> 4;
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return ((4 * 1024 * 1024) << gws);
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}
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int
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agp_sis_set_aperture(void *sc, bus_size_t aperture)
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{
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struct agp_sis_softc *ssc = sc;
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int gws;
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pcireg_t reg;
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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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reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL);
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reg &= ~0x00000070;
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reg |= gws << 4;
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pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL, reg);
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return (0);
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}
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void
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agp_sis_bind_page(void *sc, bus_addr_t offset, paddr_t physical, int flags)
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{
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struct agp_sis_softc *ssc = sc;
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ssc->gatt->ag_virtual[(offset - ssc->ssc_apaddr) >> AGP_PAGE_SHIFT] =
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physical;
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}
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void
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agp_sis_unbind_page(void *sc, bus_addr_t offset)
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{
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struct agp_sis_softc *ssc = sc;
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ssc->gatt->ag_virtual[(offset - ssc->ssc_apaddr) >> AGP_PAGE_SHIFT] = 0;
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}
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void
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agp_sis_flush_tlb(void *sc)
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{
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struct agp_sis_softc *ssc = sc;
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pcireg_t reg;
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reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_TLBFLUSH);
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reg &= 0xffffff00;
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reg |= 0x02;
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pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_TLBFLUSH, reg);
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}
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