1095443edb
to check aperture size, avoiding hangs. Maintain the rest of the bits when setting/unsetting ATTBASE. This essentially matches Linux's AGP driver as well. PR: kern/70037 Submitted by: Mark Tinguely <tinguely at casselton dot net> Obtained from: NetBSD
276 lines
6.8 KiB
C
276 lines
6.8 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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#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 <dev/pci/pcivar.h>
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#include <dev/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_ali_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_ali_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 0x154110b9:
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return ("Ali M1541 host to AGP bridge");
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};
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if (pci_get_vendor(dev) == 0x10b9)
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return ("Ali 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_ali_probe(device_t dev)
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{
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const char *desc;
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if (resource_disabled("agp", device_get_unit(dev)))
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return (ENXIO);
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desc = agp_ali_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_ali_attach(device_t dev)
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{
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struct agp_ali_softc *sc = device_get_softc(dev);
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struct agp_gatt *gatt;
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int error;
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u_int32_t attbase;
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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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if (sc->initial_aperture == 0) {
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device_printf(dev, "bad initial aperture size, disabling\n");
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return ENXIO;
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}
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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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attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
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pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
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(attbase & 0xfff), 4);
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/* Enable the TLB. */
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pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
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return 0;
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}
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static int
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agp_ali_detach(device_t dev)
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{
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struct agp_ali_softc *sc = device_get_softc(dev);
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int error;
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u_int32_t attbase;
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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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/* Disable the TLB.. */
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pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
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/* Put the aperture back the way it started. */
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AGP_SET_APERTURE(dev, sc->initial_aperture);
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attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
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pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
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agp_free_gatt(sc->gatt);
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return 0;
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}
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#define M 1024*1024
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static 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 - invalid */
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8*M, /* 4 - invalid */
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0, /* 5 - invalid */
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16*M, /* 6 - invalid */
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32*M, /* 7 - invalid */
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64*M, /* 8 - invalid */
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128*M, /* 9 - invalid */
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256*M, /* 10 - invalid */
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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(device_t dev)
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{
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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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int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 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(device_t dev, u_int32_t aperture)
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{
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int i;
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u_int32_t attbase;
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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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attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
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pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
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return 0;
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}
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static int
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agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
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{
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struct agp_ali_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_ali_unbind_page(device_t dev, int offset)
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{
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struct agp_ali_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_ali_flush_tlb(device_t dev)
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{
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pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
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pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
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}
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static device_method_t agp_ali_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, agp_ali_probe),
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DEVMETHOD(device_attach, agp_ali_attach),
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DEVMETHOD(device_detach, agp_ali_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_ali_get_aperture),
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DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
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DEVMETHOD(agp_bind_page, agp_ali_bind_page),
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DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
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DEVMETHOD(agp_flush_tlb, agp_ali_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_ali_driver = {
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"agp",
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agp_ali_methods,
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sizeof(struct agp_ali_softc),
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};
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static devclass_t agp_devclass;
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DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
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MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
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MODULE_DEPEND(agp_ali, pci, 1, 1, 1);
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