1073 lines
25 KiB
C
1073 lines
25 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2000 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include "opt_agp.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/conf.h>
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#include <sys/ioccom.h>
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#include <sys/agpio.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 <sys/rwlock.h>
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#include <dev/agp/agppriv.h>
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#include <dev/agp/agpvar.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_extern.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_param.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pageout.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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MODULE_VERSION(agp, 1);
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MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
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/* agp_drv.c */
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static d_open_t agp_open;
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static d_close_t agp_close;
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static d_ioctl_t agp_ioctl;
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static d_mmap_t agp_mmap;
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static struct cdevsw agp_cdevsw = {
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.d_version = D_VERSION,
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.d_flags = D_NEEDGIANT,
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.d_open = agp_open,
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.d_close = agp_close,
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.d_ioctl = agp_ioctl,
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.d_mmap = agp_mmap,
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.d_name = "agp",
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};
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static devclass_t agp_devclass;
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/* Helper functions for implementing chipset mini drivers. */
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u_int8_t
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agp_find_caps(device_t dev)
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{
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int capreg;
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if (pci_find_cap(dev, PCIY_AGP, &capreg) != 0)
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capreg = 0;
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return (capreg);
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}
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/*
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* Find an AGP display device (if any).
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*/
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static device_t
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agp_find_display(void)
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{
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devclass_t pci = devclass_find("pci");
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device_t bus, dev = 0;
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device_t *kids;
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int busnum, numkids, i;
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for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
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bus = devclass_get_device(pci, busnum);
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if (!bus)
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continue;
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if (device_get_children(bus, &kids, &numkids) != 0)
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continue;
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for (i = 0; i < numkids; i++) {
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dev = kids[i];
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if (pci_get_class(dev) == PCIC_DISPLAY
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&& pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
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if (agp_find_caps(dev)) {
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free(kids, M_TEMP);
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return dev;
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}
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}
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free(kids, M_TEMP);
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}
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return 0;
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}
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struct agp_gatt *
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agp_alloc_gatt(device_t dev)
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{
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u_int32_t apsize = AGP_GET_APERTURE(dev);
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u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
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struct agp_gatt *gatt;
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if (bootverbose)
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device_printf(dev,
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"allocating GATT for aperture of size %dM\n",
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apsize / (1024*1024));
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if (entries == 0) {
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device_printf(dev, "bad aperture size\n");
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return NULL;
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}
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gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
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if (!gatt)
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return 0;
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gatt->ag_entries = entries;
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gatt->ag_virtual = kmem_alloc_contig(entries * sizeof(uint32_t),
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M_NOWAIT | M_ZERO, 0, ~0, PAGE_SIZE, 0, VM_MEMATTR_WRITE_COMBINING);
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if (!gatt->ag_virtual) {
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if (bootverbose)
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device_printf(dev, "contiguous allocation failed\n");
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free(gatt, M_AGP);
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return 0;
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}
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gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
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return gatt;
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}
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void
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agp_free_gatt(struct agp_gatt *gatt)
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{
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kmem_free(gatt->ag_virtual, gatt->ag_entries * sizeof(uint32_t));
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free(gatt, M_AGP);
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}
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static u_int agp_max[][2] = {
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{0, 0},
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{32, 4},
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{64, 28},
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{128, 96},
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{256, 204},
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{512, 440},
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{1024, 942},
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{2048, 1920},
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{4096, 3932}
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};
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#define AGP_MAX_SIZE nitems(agp_max)
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/**
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* Sets the PCI resource which represents the AGP aperture.
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*
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* If not called, the default AGP aperture resource of AGP_APBASE will
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* be used. Must be called before agp_generic_attach().
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*/
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void
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agp_set_aperture_resource(device_t dev, int rid)
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{
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struct agp_softc *sc = device_get_softc(dev);
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sc->as_aperture_rid = rid;
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}
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int
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agp_generic_attach(device_t dev)
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{
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struct make_dev_args mdargs;
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struct agp_softc *sc = device_get_softc(dev);
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int error, i, unit;
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u_int memsize;
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/*
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* Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
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* because the kernel doesn't need to map it.
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*/
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if (sc->as_aperture_rid != -1) {
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if (sc->as_aperture_rid == 0)
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sc->as_aperture_rid = AGP_APBASE;
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sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->as_aperture_rid, RF_SHAREABLE);
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if (!sc->as_aperture)
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return ENOMEM;
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}
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/*
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* Work out an upper bound for agp memory allocation. This
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* uses a heurisitc table from the Linux driver.
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*/
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memsize = ptoa(realmem) >> 20;
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for (i = 0; i < AGP_MAX_SIZE; i++) {
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if (memsize <= agp_max[i][0])
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break;
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}
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if (i == AGP_MAX_SIZE)
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i = AGP_MAX_SIZE - 1;
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sc->as_maxmem = agp_max[i][1] << 20U;
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/*
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* The lock is used to prevent re-entry to
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* agp_generic_bind_memory() since that function can sleep.
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*/
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mtx_init(&sc->as_lock, "agp lock", NULL, MTX_DEF);
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/*
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* Initialise stuff for the userland device.
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*/
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agp_devclass = devclass_find("agp");
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TAILQ_INIT(&sc->as_memory);
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sc->as_nextid = 1;
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sc->as_devalias = NULL;
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make_dev_args_init(&mdargs);
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mdargs.mda_devsw = &agp_cdevsw;
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mdargs.mda_uid = UID_ROOT;
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mdargs.mda_gid = GID_WHEEL;
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mdargs.mda_mode = 0600;
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mdargs.mda_si_drv1 = sc;
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mdargs.mda_si_drv2 = NULL;
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unit = device_get_unit(dev);
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error = make_dev_s(&mdargs, &sc->as_devnode, "agpgart%d", unit);
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if (error == 0) {
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/*
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* Create an alias for the first device that shows up.
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*/
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if (unit == 0) {
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(void)make_dev_alias_p(MAKEDEV_CHECKNAME,
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&sc->as_devalias, sc->as_devnode, "agpgart");
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}
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} else {
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agp_free_res(dev);
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}
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return error;
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}
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void
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agp_free_cdev(device_t dev)
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{
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struct agp_softc *sc = device_get_softc(dev);
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destroy_dev(sc->as_devnode);
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if (sc->as_devalias != NULL)
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destroy_dev(sc->as_devalias);
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}
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void
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agp_free_res(device_t dev)
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{
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struct agp_softc *sc = device_get_softc(dev);
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if (sc->as_aperture != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
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sc->as_aperture);
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mtx_destroy(&sc->as_lock);
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}
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int
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agp_generic_detach(device_t dev)
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{
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agp_free_cdev(dev);
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agp_free_res(dev);
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return 0;
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}
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/**
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* Default AGP aperture size detection which simply returns the size of
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* the aperture's PCI resource.
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*/
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u_int32_t
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agp_generic_get_aperture(device_t dev)
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{
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struct agp_softc *sc = device_get_softc(dev);
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return rman_get_size(sc->as_aperture);
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}
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/**
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* Default AGP aperture size setting function, which simply doesn't allow
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* changes to resource size.
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*/
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int
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agp_generic_set_aperture(device_t dev, u_int32_t aperture)
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{
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u_int32_t current_aperture;
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current_aperture = AGP_GET_APERTURE(dev);
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if (current_aperture != aperture)
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return EINVAL;
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else
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return 0;
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}
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/*
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* This does the enable logic for v3, with the same topology
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* restrictions as in place for v2 -- one bus, one device on the bus.
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*/
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static int
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agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
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{
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u_int32_t tstatus, mstatus;
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u_int32_t command;
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int rq, sba, fw, rate, arqsz, cal;
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tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
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mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
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/* Set RQ to the min of mode, tstatus and mstatus */
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rq = AGP_MODE_GET_RQ(mode);
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if (AGP_MODE_GET_RQ(tstatus) < rq)
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rq = AGP_MODE_GET_RQ(tstatus);
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if (AGP_MODE_GET_RQ(mstatus) < rq)
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rq = AGP_MODE_GET_RQ(mstatus);
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/*
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* ARQSZ - Set the value to the maximum one.
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* Don't allow the mode register to override values.
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*/
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arqsz = AGP_MODE_GET_ARQSZ(mode);
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if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
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rq = AGP_MODE_GET_ARQSZ(tstatus);
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if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
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rq = AGP_MODE_GET_ARQSZ(mstatus);
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/* Calibration cycle - don't allow override by mode register */
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cal = AGP_MODE_GET_CAL(tstatus);
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if (AGP_MODE_GET_CAL(mstatus) < cal)
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cal = AGP_MODE_GET_CAL(mstatus);
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/* SBA must be supported for AGP v3. */
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sba = 1;
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/* Set FW if all three support it. */
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fw = (AGP_MODE_GET_FW(tstatus)
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& AGP_MODE_GET_FW(mstatus)
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& AGP_MODE_GET_FW(mode));
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/* Figure out the max rate */
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rate = (AGP_MODE_GET_RATE(tstatus)
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& AGP_MODE_GET_RATE(mstatus)
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& AGP_MODE_GET_RATE(mode));
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if (rate & AGP_MODE_V3_RATE_8x)
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rate = AGP_MODE_V3_RATE_8x;
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else
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rate = AGP_MODE_V3_RATE_4x;
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if (bootverbose)
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device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
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pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
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/* Construct the new mode word and tell the hardware */
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command = 0;
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command = AGP_MODE_SET_RQ(0, rq);
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command = AGP_MODE_SET_ARQSZ(command, arqsz);
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command = AGP_MODE_SET_CAL(command, cal);
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command = AGP_MODE_SET_SBA(command, sba);
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command = AGP_MODE_SET_FW(command, fw);
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command = AGP_MODE_SET_RATE(command, rate);
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command = AGP_MODE_SET_MODE_3(command, 1);
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command = AGP_MODE_SET_AGP(command, 1);
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pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
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pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
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return 0;
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}
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static int
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agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
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{
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u_int32_t tstatus, mstatus;
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u_int32_t command;
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int rq, sba, fw, rate;
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tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
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mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
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/* Set RQ to the min of mode, tstatus and mstatus */
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rq = AGP_MODE_GET_RQ(mode);
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if (AGP_MODE_GET_RQ(tstatus) < rq)
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rq = AGP_MODE_GET_RQ(tstatus);
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if (AGP_MODE_GET_RQ(mstatus) < rq)
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rq = AGP_MODE_GET_RQ(mstatus);
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/* Set SBA if all three can deal with SBA */
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sba = (AGP_MODE_GET_SBA(tstatus)
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& AGP_MODE_GET_SBA(mstatus)
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& AGP_MODE_GET_SBA(mode));
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/* Similar for FW */
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fw = (AGP_MODE_GET_FW(tstatus)
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& AGP_MODE_GET_FW(mstatus)
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& AGP_MODE_GET_FW(mode));
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/* Figure out the max rate */
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rate = (AGP_MODE_GET_RATE(tstatus)
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& AGP_MODE_GET_RATE(mstatus)
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& AGP_MODE_GET_RATE(mode));
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if (rate & AGP_MODE_V2_RATE_4x)
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rate = AGP_MODE_V2_RATE_4x;
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else if (rate & AGP_MODE_V2_RATE_2x)
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rate = AGP_MODE_V2_RATE_2x;
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else
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rate = AGP_MODE_V2_RATE_1x;
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if (bootverbose)
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device_printf(dev, "Setting AGP v2 mode %d\n", rate);
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/* Construct the new mode word and tell the hardware */
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command = 0;
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command = AGP_MODE_SET_RQ(0, rq);
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command = AGP_MODE_SET_SBA(command, sba);
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command = AGP_MODE_SET_FW(command, fw);
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command = AGP_MODE_SET_RATE(command, rate);
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command = AGP_MODE_SET_AGP(command, 1);
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pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
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pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
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return 0;
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}
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int
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agp_generic_enable(device_t dev, u_int32_t mode)
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{
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device_t mdev = agp_find_display();
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u_int32_t tstatus, mstatus;
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if (!mdev) {
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AGP_DPF("can't find display\n");
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return ENXIO;
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}
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tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
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mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
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/*
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* Check display and bridge for AGP v3 support. AGP v3 allows
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* more variety in topology than v2, e.g. multiple AGP devices
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* attached to one bridge, or multiple AGP bridges in one
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* system. This doesn't attempt to address those situations,
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* but should work fine for a classic single AGP slot system
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* with AGP v3.
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*/
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if (AGP_MODE_GET_MODE_3(mode) &&
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AGP_MODE_GET_MODE_3(tstatus) &&
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AGP_MODE_GET_MODE_3(mstatus))
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return (agp_v3_enable(dev, mdev, mode));
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else
|
|
return (agp_v2_enable(dev, mdev, mode));
|
|
}
|
|
|
|
struct agp_memory *
|
|
agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
struct agp_memory *mem;
|
|
|
|
if ((size & (AGP_PAGE_SIZE - 1)) != 0)
|
|
return 0;
|
|
|
|
if (size > sc->as_maxmem - sc->as_allocated)
|
|
return 0;
|
|
|
|
if (type != 0) {
|
|
printf("agp_generic_alloc_memory: unsupported type %d\n",
|
|
type);
|
|
return 0;
|
|
}
|
|
|
|
mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
|
|
mem->am_id = sc->as_nextid++;
|
|
mem->am_size = size;
|
|
mem->am_type = 0;
|
|
mem->am_obj = vm_object_allocate(OBJT_SWAP, atop(round_page(size)));
|
|
mem->am_physical = 0;
|
|
mem->am_offset = 0;
|
|
mem->am_is_bound = 0;
|
|
TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
|
|
sc->as_allocated += size;
|
|
|
|
return mem;
|
|
}
|
|
|
|
int
|
|
agp_generic_free_memory(device_t dev, struct agp_memory *mem)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
|
|
if (mem->am_is_bound)
|
|
return EBUSY;
|
|
|
|
sc->as_allocated -= mem->am_size;
|
|
TAILQ_REMOVE(&sc->as_memory, mem, am_link);
|
|
vm_object_deallocate(mem->am_obj);
|
|
free(mem, M_AGP);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
|
|
vm_offset_t offset)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
vm_offset_t i, j, k;
|
|
vm_page_t m;
|
|
int error;
|
|
|
|
/* Do some sanity checks first. */
|
|
if ((offset & (AGP_PAGE_SIZE - 1)) != 0 ||
|
|
offset + mem->am_size > AGP_GET_APERTURE(dev)) {
|
|
device_printf(dev, "binding memory at bad offset %#x\n",
|
|
(int)offset);
|
|
return EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Allocate the pages early, before acquiring the lock,
|
|
* because vm_page_grab() may sleep and we can't hold a mutex
|
|
* while sleeping.
|
|
*/
|
|
VM_OBJECT_WLOCK(mem->am_obj);
|
|
for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
|
|
/*
|
|
* Find a page from the object and wire it
|
|
* down. This page will be mapped using one or more
|
|
* entries in the GATT (assuming that PAGE_SIZE >=
|
|
* AGP_PAGE_SIZE. If this is the first call to bind,
|
|
* the pages will be allocated and zeroed.
|
|
*/
|
|
m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
|
|
VM_ALLOC_WIRED | VM_ALLOC_ZERO);
|
|
AGP_DPF("found page pa=%#jx\n", (uintmax_t)VM_PAGE_TO_PHYS(m));
|
|
}
|
|
VM_OBJECT_WUNLOCK(mem->am_obj);
|
|
|
|
mtx_lock(&sc->as_lock);
|
|
|
|
if (mem->am_is_bound) {
|
|
device_printf(dev, "memory already bound\n");
|
|
error = EINVAL;
|
|
VM_OBJECT_WLOCK(mem->am_obj);
|
|
i = 0;
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Bind the individual pages and flush the chipset's
|
|
* TLB.
|
|
*/
|
|
VM_OBJECT_WLOCK(mem->am_obj);
|
|
for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
|
|
m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(i));
|
|
|
|
/*
|
|
* Install entries in the GATT, making sure that if
|
|
* AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
|
|
* aligned to PAGE_SIZE, we don't modify too many GATT
|
|
* entries.
|
|
*/
|
|
for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
|
|
j += AGP_PAGE_SIZE) {
|
|
vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
|
|
AGP_DPF("binding offset %#jx to pa %#jx\n",
|
|
(uintmax_t)offset + i + j, (uintmax_t)pa);
|
|
error = AGP_BIND_PAGE(dev, offset + i + j, pa);
|
|
if (error) {
|
|
/*
|
|
* Bail out. Reverse all the mappings
|
|
* and unwire the pages.
|
|
*/
|
|
for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
|
|
AGP_UNBIND_PAGE(dev, offset + k);
|
|
goto bad;
|
|
}
|
|
}
|
|
vm_page_xunbusy(m);
|
|
}
|
|
VM_OBJECT_WUNLOCK(mem->am_obj);
|
|
|
|
/*
|
|
* Make sure the chipset gets the new mappings.
|
|
*/
|
|
AGP_FLUSH_TLB(dev);
|
|
|
|
mem->am_offset = offset;
|
|
mem->am_is_bound = 1;
|
|
|
|
mtx_unlock(&sc->as_lock);
|
|
|
|
return 0;
|
|
bad:
|
|
mtx_unlock(&sc->as_lock);
|
|
VM_OBJECT_ASSERT_WLOCKED(mem->am_obj);
|
|
for (k = 0; k < mem->am_size; k += PAGE_SIZE) {
|
|
m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(k));
|
|
if (k >= i)
|
|
vm_page_xunbusy(m);
|
|
vm_page_unwire(m, PQ_INACTIVE);
|
|
}
|
|
VM_OBJECT_WUNLOCK(mem->am_obj);
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
vm_page_t m;
|
|
int i;
|
|
|
|
mtx_lock(&sc->as_lock);
|
|
|
|
if (!mem->am_is_bound) {
|
|
device_printf(dev, "memory is not bound\n");
|
|
mtx_unlock(&sc->as_lock);
|
|
return EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Unbind the individual pages and flush the chipset's
|
|
* TLB. Unwire the pages so they can be swapped.
|
|
*/
|
|
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
|
|
AGP_UNBIND_PAGE(dev, mem->am_offset + i);
|
|
|
|
AGP_FLUSH_TLB(dev);
|
|
|
|
VM_OBJECT_WLOCK(mem->am_obj);
|
|
for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
|
|
m = vm_page_lookup(mem->am_obj, atop(i));
|
|
vm_page_unwire(m, PQ_INACTIVE);
|
|
}
|
|
VM_OBJECT_WUNLOCK(mem->am_obj);
|
|
|
|
mem->am_offset = 0;
|
|
mem->am_is_bound = 0;
|
|
|
|
mtx_unlock(&sc->as_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Helper functions for implementing user/kernel api */
|
|
|
|
static int
|
|
agp_acquire_helper(device_t dev, enum agp_acquire_state state)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
|
|
if (sc->as_state != AGP_ACQUIRE_FREE)
|
|
return EBUSY;
|
|
sc->as_state = state;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
agp_release_helper(device_t dev, enum agp_acquire_state state)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
|
|
if (sc->as_state == AGP_ACQUIRE_FREE)
|
|
return 0;
|
|
|
|
if (sc->as_state != state)
|
|
return EBUSY;
|
|
|
|
sc->as_state = AGP_ACQUIRE_FREE;
|
|
return 0;
|
|
}
|
|
|
|
static struct agp_memory *
|
|
agp_find_memory(device_t dev, int id)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
struct agp_memory *mem;
|
|
|
|
AGP_DPF("searching for memory block %d\n", id);
|
|
TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
|
|
AGP_DPF("considering memory block %d\n", mem->am_id);
|
|
if (mem->am_id == id)
|
|
return mem;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Implementation of the userland ioctl api */
|
|
|
|
static int
|
|
agp_info_user(device_t dev, agp_info *info)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
|
|
bzero(info, sizeof *info);
|
|
info->bridge_id = pci_get_devid(dev);
|
|
info->agp_mode =
|
|
pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
|
|
if (sc->as_aperture)
|
|
info->aper_base = rman_get_start(sc->as_aperture);
|
|
else
|
|
info->aper_base = 0;
|
|
info->aper_size = AGP_GET_APERTURE(dev) >> 20;
|
|
info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
|
|
info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
agp_setup_user(device_t dev, agp_setup *setup)
|
|
{
|
|
return AGP_ENABLE(dev, setup->agp_mode);
|
|
}
|
|
|
|
static int
|
|
agp_allocate_user(device_t dev, agp_allocate *alloc)
|
|
{
|
|
struct agp_memory *mem;
|
|
|
|
mem = AGP_ALLOC_MEMORY(dev,
|
|
alloc->type,
|
|
alloc->pg_count << AGP_PAGE_SHIFT);
|
|
if (mem) {
|
|
alloc->key = mem->am_id;
|
|
alloc->physical = mem->am_physical;
|
|
return 0;
|
|
} else {
|
|
return ENOMEM;
|
|
}
|
|
}
|
|
|
|
static int
|
|
agp_deallocate_user(device_t dev, int id)
|
|
{
|
|
struct agp_memory *mem = agp_find_memory(dev, id);
|
|
|
|
if (mem) {
|
|
AGP_FREE_MEMORY(dev, mem);
|
|
return 0;
|
|
} else {
|
|
return ENOENT;
|
|
}
|
|
}
|
|
|
|
static int
|
|
agp_bind_user(device_t dev, agp_bind *bind)
|
|
{
|
|
struct agp_memory *mem = agp_find_memory(dev, bind->key);
|
|
|
|
if (!mem)
|
|
return ENOENT;
|
|
|
|
return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
|
|
}
|
|
|
|
static int
|
|
agp_unbind_user(device_t dev, agp_unbind *unbind)
|
|
{
|
|
struct agp_memory *mem = agp_find_memory(dev, unbind->key);
|
|
|
|
if (!mem)
|
|
return ENOENT;
|
|
|
|
return AGP_UNBIND_MEMORY(dev, mem);
|
|
}
|
|
|
|
static int
|
|
agp_chipset_flush(device_t dev)
|
|
{
|
|
|
|
return (AGP_CHIPSET_FLUSH(dev));
|
|
}
|
|
|
|
static int
|
|
agp_open(struct cdev *kdev, int oflags, int devtype, struct thread *td)
|
|
{
|
|
device_t dev = kdev->si_drv1;
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
|
|
if (!sc->as_isopen) {
|
|
sc->as_isopen = 1;
|
|
device_busy(dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
agp_close(struct cdev *kdev, int fflag, int devtype, struct thread *td)
|
|
{
|
|
device_t dev = kdev->si_drv1;
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
struct agp_memory *mem;
|
|
|
|
/*
|
|
* Clear the GATT and force release on last close
|
|
*/
|
|
while ((mem = TAILQ_FIRST(&sc->as_memory)) != NULL) {
|
|
if (mem->am_is_bound)
|
|
AGP_UNBIND_MEMORY(dev, mem);
|
|
AGP_FREE_MEMORY(dev, mem);
|
|
}
|
|
if (sc->as_state == AGP_ACQUIRE_USER)
|
|
agp_release_helper(dev, AGP_ACQUIRE_USER);
|
|
sc->as_isopen = 0;
|
|
device_unbusy(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
agp_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int fflag, struct thread *td)
|
|
{
|
|
device_t dev = kdev->si_drv1;
|
|
|
|
switch (cmd) {
|
|
case AGPIOC_INFO:
|
|
return agp_info_user(dev, (agp_info *) data);
|
|
|
|
case AGPIOC_ACQUIRE:
|
|
return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
|
|
|
|
case AGPIOC_RELEASE:
|
|
return agp_release_helper(dev, AGP_ACQUIRE_USER);
|
|
|
|
case AGPIOC_SETUP:
|
|
return agp_setup_user(dev, (agp_setup *)data);
|
|
|
|
case AGPIOC_ALLOCATE:
|
|
return agp_allocate_user(dev, (agp_allocate *)data);
|
|
|
|
case AGPIOC_DEALLOCATE:
|
|
return agp_deallocate_user(dev, *(int *) data);
|
|
|
|
case AGPIOC_BIND:
|
|
return agp_bind_user(dev, (agp_bind *)data);
|
|
|
|
case AGPIOC_UNBIND:
|
|
return agp_unbind_user(dev, (agp_unbind *)data);
|
|
|
|
case AGPIOC_CHIPSET_FLUSH:
|
|
return agp_chipset_flush(dev);
|
|
}
|
|
|
|
return EINVAL;
|
|
}
|
|
|
|
static int
|
|
agp_mmap(struct cdev *kdev, vm_ooffset_t offset, vm_paddr_t *paddr,
|
|
int prot, vm_memattr_t *memattr)
|
|
{
|
|
device_t dev = kdev->si_drv1;
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
|
|
if (offset > AGP_GET_APERTURE(dev))
|
|
return -1;
|
|
if (sc->as_aperture == NULL)
|
|
return -1;
|
|
*paddr = rman_get_start(sc->as_aperture) + offset;
|
|
return 0;
|
|
}
|
|
|
|
/* Implementation of the kernel api */
|
|
|
|
device_t
|
|
agp_find_device(void)
|
|
{
|
|
device_t *children, child;
|
|
int i, count;
|
|
|
|
if (!agp_devclass)
|
|
return NULL;
|
|
if (devclass_get_devices(agp_devclass, &children, &count) != 0)
|
|
return NULL;
|
|
child = NULL;
|
|
for (i = 0; i < count; i++) {
|
|
if (device_is_attached(children[i])) {
|
|
child = children[i];
|
|
break;
|
|
}
|
|
}
|
|
free(children, M_TEMP);
|
|
return child;
|
|
}
|
|
|
|
enum agp_acquire_state
|
|
agp_state(device_t dev)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
return sc->as_state;
|
|
}
|
|
|
|
void
|
|
agp_get_info(device_t dev, struct agp_info *info)
|
|
{
|
|
struct agp_softc *sc = device_get_softc(dev);
|
|
|
|
info->ai_mode =
|
|
pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
|
|
if (sc->as_aperture != NULL)
|
|
info->ai_aperture_base = rman_get_start(sc->as_aperture);
|
|
else
|
|
info->ai_aperture_base = 0;
|
|
info->ai_aperture_size = AGP_GET_APERTURE(dev);
|
|
info->ai_memory_allowed = sc->as_maxmem;
|
|
info->ai_memory_used = sc->as_allocated;
|
|
}
|
|
|
|
int
|
|
agp_acquire(device_t dev)
|
|
{
|
|
return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
|
|
}
|
|
|
|
int
|
|
agp_release(device_t dev)
|
|
{
|
|
return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
|
|
}
|
|
|
|
int
|
|
agp_enable(device_t dev, u_int32_t mode)
|
|
{
|
|
return AGP_ENABLE(dev, mode);
|
|
}
|
|
|
|
void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
|
|
{
|
|
return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
|
|
}
|
|
|
|
void agp_free_memory(device_t dev, void *handle)
|
|
{
|
|
struct agp_memory *mem = (struct agp_memory *) handle;
|
|
AGP_FREE_MEMORY(dev, mem);
|
|
}
|
|
|
|
int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
|
|
{
|
|
struct agp_memory *mem = (struct agp_memory *) handle;
|
|
return AGP_BIND_MEMORY(dev, mem, offset);
|
|
}
|
|
|
|
int agp_unbind_memory(device_t dev, void *handle)
|
|
{
|
|
struct agp_memory *mem = (struct agp_memory *) handle;
|
|
return AGP_UNBIND_MEMORY(dev, mem);
|
|
}
|
|
|
|
void agp_memory_info(device_t dev, void *handle, struct
|
|
agp_memory_info *mi)
|
|
{
|
|
struct agp_memory *mem = (struct agp_memory *) handle;
|
|
|
|
mi->ami_size = mem->am_size;
|
|
mi->ami_physical = mem->am_physical;
|
|
mi->ami_offset = mem->am_offset;
|
|
mi->ami_is_bound = mem->am_is_bound;
|
|
}
|
|
|
|
int
|
|
agp_bind_pages(device_t dev, vm_page_t *pages, vm_size_t size,
|
|
vm_offset_t offset)
|
|
{
|
|
struct agp_softc *sc;
|
|
vm_offset_t i, j, k, pa;
|
|
vm_page_t m;
|
|
int error;
|
|
|
|
if ((size & (AGP_PAGE_SIZE - 1)) != 0 ||
|
|
(offset & (AGP_PAGE_SIZE - 1)) != 0)
|
|
return (EINVAL);
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
mtx_lock(&sc->as_lock);
|
|
for (i = 0; i < size; i += PAGE_SIZE) {
|
|
m = pages[OFF_TO_IDX(i)];
|
|
KASSERT(vm_page_wired(m),
|
|
("agp_bind_pages: page %p hasn't been wired", m));
|
|
|
|
/*
|
|
* Install entries in the GATT, making sure that if
|
|
* AGP_PAGE_SIZE < PAGE_SIZE and size is not
|
|
* aligned to PAGE_SIZE, we don't modify too many GATT
|
|
* entries.
|
|
*/
|
|
for (j = 0; j < PAGE_SIZE && i + j < size; j += AGP_PAGE_SIZE) {
|
|
pa = VM_PAGE_TO_PHYS(m) + j;
|
|
AGP_DPF("binding offset %#jx to pa %#jx\n",
|
|
(uintmax_t)offset + i + j, (uintmax_t)pa);
|
|
error = AGP_BIND_PAGE(dev, offset + i + j, pa);
|
|
if (error) {
|
|
/*
|
|
* Bail out. Reverse all the mappings.
|
|
*/
|
|
for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
|
|
AGP_UNBIND_PAGE(dev, offset + k);
|
|
|
|
mtx_unlock(&sc->as_lock);
|
|
return (error);
|
|
}
|
|
}
|
|
}
|
|
|
|
AGP_FLUSH_TLB(dev);
|
|
|
|
mtx_unlock(&sc->as_lock);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
agp_unbind_pages(device_t dev, vm_size_t size, vm_offset_t offset)
|
|
{
|
|
struct agp_softc *sc;
|
|
vm_offset_t i;
|
|
|
|
if ((size & (AGP_PAGE_SIZE - 1)) != 0 ||
|
|
(offset & (AGP_PAGE_SIZE - 1)) != 0)
|
|
return (EINVAL);
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
mtx_lock(&sc->as_lock);
|
|
for (i = 0; i < size; i += AGP_PAGE_SIZE)
|
|
AGP_UNBIND_PAGE(dev, offset + i);
|
|
|
|
AGP_FLUSH_TLB(dev);
|
|
|
|
mtx_unlock(&sc->as_lock);
|
|
return (0);
|
|
}
|