d58258f4be
Avoid unnessecary compares. Found with: Coverity Prevent(tm) CID: 2362,4215,4214,4209,4208,2363,4211,4210,4213,4212 MFC after: 3 days
440 lines
12 KiB
C
440 lines
12 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/agp/agppriv.h>
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#include <dev/agp/agpreg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.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 MAX_APSIZE 0x3f /* 256 MB */
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struct agp_intel_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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u_int aperture_mask;
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u_int32_t current_aperture; /* current aperture size */
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};
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static const char*
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agp_intel_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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/* Intel -- vendor 0x8086 */
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case 0x71808086:
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return ("Intel 82443LX (440 LX) host to PCI bridge");
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case 0x71908086:
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return ("Intel 82443BX (440 BX) host to PCI bridge");
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case 0x71a08086:
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return ("Intel 82443GX host to PCI bridge");
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case 0x71a18086:
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return ("Intel 82443GX host to AGP bridge");
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case 0x11308086:
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return ("Intel 82815 (i815 GMCH) host to PCI bridge");
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case 0x25008086:
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case 0x25018086:
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return ("Intel 82820 host to AGP bridge");
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case 0x35758086:
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return ("Intel 82830 host to AGP bridge");
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case 0x1a218086:
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return ("Intel 82840 host to AGP bridge");
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case 0x1a308086:
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return ("Intel 82845 host to AGP bridge");
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case 0x25308086:
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return ("Intel 82850 host to AGP bridge");
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case 0x33408086:
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return ("Intel 82855 host to AGP bridge");
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case 0x25318086:
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return ("Intel 82860 host to AGP bridge");
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case 0x25708086:
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return ("Intel 82865 host to AGP bridge");
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case 0x255d8086:
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return ("Intel E7205 host to AGP bridge");
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case 0x25508086:
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return ("Intel E7505 host to AGP bridge");
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case 0x25788086:
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return ("Intel 82875P host to AGP bridge");
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case 0x25608086:
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return ("Intel 82845G host to AGP bridge");
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case 0x35808086:
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return ("Intel 82855GM 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_intel_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_intel_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 void
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agp_intel_commit_gatt(device_t dev)
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{
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struct agp_intel_softc *sc;
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u_int32_t type;
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u_int32_t value;
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sc = device_get_softc(dev);
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type = pci_get_devid(dev);
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/* Install the gatt. */
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pci_write_config(dev, AGP_INTEL_ATTBASE, sc->gatt->ag_physical, 4);
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/* Enable the GLTB and setup the control register. */
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switch (type) {
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case 0x71908086: /* 440LX/EX */
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pci_write_config(dev, AGP_INTEL_AGPCTRL, 0x2080, 4);
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break;
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case 0x71808086: /* 440BX */
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/*
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* XXX: Should be 0xa080? Bit 9 is undefined, and
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* bit 13 being on and bit 15 being clear is illegal.
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*/
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pci_write_config(dev, AGP_INTEL_AGPCTRL, 0x2280, 4);
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break;
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default:
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value = pci_read_config(dev, AGP_INTEL_AGPCTRL, 4);
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pci_write_config(dev, AGP_INTEL_AGPCTRL, value | 0x80, 4);
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}
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/* Enable aperture accesses. */
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switch (type) {
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case 0x25008086: /* i820 */
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case 0x25018086: /* i820 */
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pci_write_config(dev, AGP_INTEL_I820_RDCR,
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(pci_read_config(dev, AGP_INTEL_I820_RDCR, 1)
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| (1 << 1)), 1);
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break;
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case 0x1a308086: /* i845 */
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case 0x25608086: /* i845G */
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case 0x33408086: /* i855 */
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case 0x35808086: /* i855GM */
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case 0x25708086: /* i865 */
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case 0x25788086: /* i875P */
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pci_write_config(dev, AGP_INTEL_I845_AGPM,
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(pci_read_config(dev, AGP_INTEL_I845_AGPM, 1)
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| (1 << 1)), 1);
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break;
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case 0x1a218086: /* i840 */
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case 0x25308086: /* i850 */
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case 0x25318086: /* i860 */
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case 0x255d8086: /* E7205 */
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case 0x25508086: /* E7505 */
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pci_write_config(dev, AGP_INTEL_MCHCFG,
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(pci_read_config(dev, AGP_INTEL_MCHCFG, 2)
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| (1 << 9)), 2);
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break;
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default: /* Intel Generic (maybe) */
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pci_write_config(dev, AGP_INTEL_NBXCFG,
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(pci_read_config(dev, AGP_INTEL_NBXCFG, 4)
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& ~(1 << 10)) | (1 << 9), 4);
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}
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/* Clear errors. */
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switch (type) {
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case 0x1a218086: /* i840 */
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pci_write_config(dev, AGP_INTEL_I8XX_ERRSTS, 0xc000, 2);
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break;
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case 0x25008086: /* i820 */
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case 0x25018086: /* i820 */
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case 0x1a308086: /* i845 */
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case 0x25608086: /* i845G */
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case 0x25308086: /* i850 */
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case 0x33408086: /* i855 */
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case 0x25318086: /* i860 */
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case 0x25708086: /* i865 */
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case 0x25788086: /* i875P */
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case 0x255d8086: /* E7205 */
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case 0x25508086: /* E7505 */
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pci_write_config(dev, AGP_INTEL_I8XX_ERRSTS, 0x00ff, 2);
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break;
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default: /* Intel Generic (maybe) */
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pci_write_config(dev, AGP_INTEL_ERRSTS + 1, 7, 1);
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}
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}
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static int
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agp_intel_attach(device_t dev)
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{
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struct agp_intel_softc *sc;
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struct agp_gatt *gatt;
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u_int32_t value;
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int error;
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sc = device_get_softc(dev);
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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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/* Determine maximum supported aperture size. */
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value = pci_read_config(dev, AGP_INTEL_APSIZE, 1);
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pci_write_config(dev, AGP_INTEL_APSIZE, MAX_APSIZE, 1);
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sc->aperture_mask = pci_read_config(dev, AGP_INTEL_APSIZE, 1) &
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MAX_APSIZE;
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pci_write_config(dev, AGP_INTEL_APSIZE, value, 1);
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sc->current_aperture = 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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agp_intel_commit_gatt(dev);
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return (0);
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}
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static int
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agp_intel_detach(device_t dev)
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{
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struct agp_intel_softc *sc;
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u_int32_t reg;
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sc = device_get_softc(dev);
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agp_free_cdev(dev);
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/* Disable aperture accesses. */
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switch (pci_get_devid(dev)) {
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case 0x25008086: /* i820 */
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case 0x25018086: /* i820 */
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reg = pci_read_config(dev, AGP_INTEL_I820_RDCR, 1) & ~(1 << 1);
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printf("%s: set RDCR to %02x\n", __func__, reg & 0xff);
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pci_write_config(dev, AGP_INTEL_I820_RDCR, reg, 1);
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break;
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case 0x1a308086: /* i845 */
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case 0x25608086: /* i845G */
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case 0x33408086: /* i855 */
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case 0x35808086: /* i855GM */
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case 0x25708086: /* i865 */
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case 0x25788086: /* i875P */
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reg = pci_read_config(dev, AGP_INTEL_I845_AGPM, 1) & ~(1 << 1);
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printf("%s: set AGPM to %02x\n", __func__, reg & 0xff);
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pci_write_config(dev, AGP_INTEL_I845_AGPM, reg, 1);
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break;
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case 0x1a218086: /* i840 */
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case 0x25308086: /* i850 */
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case 0x25318086: /* i860 */
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case 0x255d8086: /* E7205 */
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case 0x25508086: /* E7505 */
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reg = pci_read_config(dev, AGP_INTEL_MCHCFG, 2) & ~(1 << 9);
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printf("%s: set MCHCFG to %x04\n", __func__, reg & 0xffff);
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pci_write_config(dev, AGP_INTEL_MCHCFG, reg, 2);
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break;
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default: /* Intel Generic (maybe) */
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reg = pci_read_config(dev, AGP_INTEL_NBXCFG, 4) & ~(1 << 9);
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printf("%s: set NBXCFG to %08x\n", __func__, reg);
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pci_write_config(dev, AGP_INTEL_NBXCFG, reg, 4);
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}
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pci_write_config(dev, AGP_INTEL_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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agp_free_res(dev);
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return (0);
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}
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static int
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agp_intel_resume(device_t dev)
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{
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struct agp_intel_softc *sc;
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sc = device_get_softc(dev);
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AGP_SET_APERTURE(dev, sc->current_aperture);
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agp_intel_commit_gatt(dev);
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return (bus_generic_resume(dev));
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}
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static u_int32_t
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agp_intel_get_aperture(device_t dev)
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{
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struct agp_intel_softc *sc;
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u_int32_t apsize;
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sc = device_get_softc(dev);
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apsize = pci_read_config(dev, AGP_INTEL_APSIZE, 1) & sc->aperture_mask;
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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 22 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 27:22
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* to be zero. We calculate the aperture size accordingly.
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*/
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return ((((apsize ^ sc->aperture_mask) << 22) | ((1 << 22) - 1)) + 1);
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}
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static int
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agp_intel_set_aperture(device_t dev, u_int32_t aperture)
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{
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struct agp_intel_softc *sc;
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u_int32_t apsize;
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sc = device_get_softc(dev);
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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) >> 22) ^ sc->aperture_mask;
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/*
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* Double check for sanity.
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*/
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if ((((apsize ^ sc->aperture_mask) << 22) | ((1 << 22) - 1)) + 1 != aperture)
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return (EINVAL);
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sc->current_aperture = apsize;
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pci_write_config(dev, AGP_INTEL_APSIZE, apsize, 1);
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return (0);
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}
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static int
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agp_intel_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
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{
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struct agp_intel_softc *sc;
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sc = device_get_softc(dev);
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if (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 | 0x17;
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return (0);
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}
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static int
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agp_intel_unbind_page(device_t dev, vm_offset_t offset)
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{
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struct agp_intel_softc *sc;
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sc = device_get_softc(dev);
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if (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_intel_flush_tlb(device_t dev)
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{
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u_int32_t val;
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val = pci_read_config(dev, AGP_INTEL_AGPCTRL, 4);
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pci_write_config(dev, AGP_INTEL_AGPCTRL, val & ~(1 << 7), 4);
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pci_write_config(dev, AGP_INTEL_AGPCTRL, val, 4);
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}
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static device_method_t agp_intel_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, agp_intel_probe),
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DEVMETHOD(device_attach, agp_intel_attach),
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DEVMETHOD(device_detach, agp_intel_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, agp_intel_resume),
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/* AGP interface */
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DEVMETHOD(agp_get_aperture, agp_intel_get_aperture),
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DEVMETHOD(agp_set_aperture, agp_intel_set_aperture),
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DEVMETHOD(agp_bind_page, agp_intel_bind_page),
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DEVMETHOD(agp_unbind_page, agp_intel_unbind_page),
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DEVMETHOD(agp_flush_tlb, agp_intel_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_intel_driver = {
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"agp",
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agp_intel_methods,
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sizeof(struct agp_intel_softc),
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};
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static devclass_t agp_devclass;
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DRIVER_MODULE(agp_intel, hostb, agp_intel_driver, agp_devclass, 0, 0);
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MODULE_DEPEND(agp_intel, agp, 1, 1, 1);
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MODULE_DEPEND(agp_intel, pci, 1, 1, 1);
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