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c626f1fe9a
attach to the hostb driver instead. This means that agp can now be loaded at runtime (in theory at least). Also, the drivers no longer have to explicity call device_verbose() to cancel out any earlier calls to device_quiet() by the hostb(4) driver (this shows a limitation in new-bus, drivers really shouldn't be doing device_quiet() until they know they are going to drive that device, i.e. in attach).
368 lines
9.9 KiB
C
368 lines
9.9 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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#define REG_GARTCTRL 0
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#define REG_APSIZE 1
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#define REG_ATTBASE 2
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struct agp_via_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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int *regs;
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};
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static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
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AGP_VIA_ATTBASE };
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static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
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AGP3_VIA_ATTBASE };
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static const char*
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agp_via_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 0x01981106:
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return ("VIA 8763 (P4X600) host to PCI bridge");
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case 0x02591106:
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return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge");
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case 0x02691106:
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return ("VIA KT880 host to PCI bridge");
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case 0x02961106:
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return ("VIA 3296 (P4M800) host to PCI bridge");
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case 0x03051106:
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return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge");
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case 0x03911106:
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return ("VIA 8371 (Apollo KX133) host to PCI bridge");
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case 0x05011106:
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return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
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case 0x05971106:
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return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
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case 0x05981106:
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return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
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case 0x06011106:
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return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
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case 0x06051106:
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return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
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case 0x06911106:
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return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
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case 0x30911106:
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return ("VIA 8633 (Pro 266) host to PCI bridge");
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case 0x30991106:
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return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
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case 0x31011106:
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return ("VIA 8653 (Pro266T) host to PCI bridge");
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case 0x31121106:
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return ("VIA 8361 (KLE133) host to PCI bridge");
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case 0x31161106:
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return ("VIA XM266 (PM266/KM266) host to PCI bridge");
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case 0x31231106:
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return ("VIA 862x (CLE266) host to PCI bridge");
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case 0x31281106:
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return ("VIA 8753 (P4X266) host to PCI bridge");
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case 0x31481106:
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return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
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case 0x31561106:
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return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
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case 0x31681106:
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return ("VIA 8754 (PT800) host to PCI bridge");
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case 0x31891106:
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return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
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case 0x32051106:
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return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
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case 0x32081106:
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return ("VIA 8783 (PT890) host to PCI bridge");
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case 0x32581106:
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return ("VIA PT880 host to PCI bridge");
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case 0xb1981106:
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return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI 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_via_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_via_match(dev);
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if (desc) {
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device_set_desc(dev, desc);
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return BUS_PROBE_DEFAULT;
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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_via_attach(device_t dev)
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{
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struct agp_via_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 agpsel;
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/* XXX: This should be keying off of whether the bridge is AGP3 capable,
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* rather than a bunch of device ids for chipsets that happen to do 8x.
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*/
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switch (pci_get_devid(dev)) {
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case 0x01981106:
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case 0x02591106:
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case 0x02691106:
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case 0x02961106:
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case 0x31231106:
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case 0x31681106:
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case 0x31891106:
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case 0x32051106:
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case 0x32581106:
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case 0xb1981106:
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/* The newer VIA chipsets will select the AGP version based on
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* what AGP versions the card supports. We still have to
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* program it using the v2 registers if it has chosen to use
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* compatibility mode.
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*/
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agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
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if ((agpsel & (1 << 1)) == 0)
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sc->regs = via_v3_regs;
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else
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sc->regs = via_v2_regs;
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break;
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default:
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sc->regs = via_v2_regs;
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break;
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}
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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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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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if (sc->regs == via_v2_regs) {
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/* Install the gatt. */
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pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
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/* Enable the aperture. */
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pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
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} else {
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u_int32_t gartctrl;
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/* Install the gatt. */
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pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4);
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/* Enable the aperture. */
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gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4);
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pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4);
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}
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return 0;
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}
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static int
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agp_via_detach(device_t dev)
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{
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struct agp_via_softc *sc = device_get_softc(dev);
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int error;
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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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pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
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pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
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AGP_SET_APERTURE(dev, sc->initial_aperture);
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agp_free_gatt(sc->gatt);
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return 0;
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}
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static u_int32_t
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agp_via_get_aperture(device_t dev)
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{
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struct agp_via_softc *sc = device_get_softc(dev);
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u_int32_t apsize;
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apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f;
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/*
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* The size is determined by the number of low bits of
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* register APBASE which are forced to zero. The low 20 bits
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* are always forced to zero and each zero bit in the apsize
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* field just read forces the corresponding bit in the 27:20
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* to be zero. We calculate the aperture size accordingly.
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*/
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return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
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}
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static int
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agp_via_set_aperture(device_t dev, u_int32_t aperture)
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{
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struct agp_via_softc *sc = device_get_softc(dev);
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u_int32_t apsize;
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/*
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* Reverse the magic from get_aperture.
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*/
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apsize = ((aperture - 1) >> 20) ^ 0xff;
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/*
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* Double check for sanity.
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*/
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if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
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return EINVAL;
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pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
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return 0;
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}
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static int
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agp_via_bind_page(device_t dev, int offset, vm_offset_t physical)
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{
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struct agp_via_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_via_unbind_page(device_t dev, int offset)
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{
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struct agp_via_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_via_flush_tlb(device_t dev)
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{
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struct agp_via_softc *sc = device_get_softc(dev);
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u_int32_t gartctrl;
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if (sc->regs == via_v2_regs) {
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pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
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pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
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} else {
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gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
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pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl &
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~(1 << 7), 4);
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pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4);
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}
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}
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static device_method_t agp_via_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, agp_via_probe),
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DEVMETHOD(device_attach, agp_via_attach),
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DEVMETHOD(device_detach, agp_via_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_via_get_aperture),
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DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
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DEVMETHOD(agp_bind_page, agp_via_bind_page),
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DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
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DEVMETHOD(agp_flush_tlb, agp_via_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_via_driver = {
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"agp",
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agp_via_methods,
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sizeof(struct agp_via_softc),
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};
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static devclass_t agp_devclass;
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DRIVER_MODULE(agp_via, hostb, agp_via_driver, agp_devclass, 0, 0);
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MODULE_DEPEND(agp_via, agp, 1, 1, 1);
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MODULE_DEPEND(agp_via, pci, 1, 1, 1);
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