124cfec04a
generic bridge support was biting us more than it helped, whenever a new chipset came out from a vendor and misprogramming it caused strange hangs or corruption. [2] Add a large number of PCI IDs based on what the linux drivers support. Note that the new PCI IDs haven't been tested, they're just *likely* to work. In particular the VIA AGP 8x chipsets are concerning, due to lack of testing, possible issues (kern/69953), and not having a nice "does this bridge say it would do 8x" function. However, this shouldn't make the situation worse, since these chips would have probed in the past anyway.
275 lines
6.8 KiB
C
275 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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case 0x162110b9:
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return ("Ali M1621 host to AGP bridge");
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};
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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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