freebsd-dev/sys/dev/agp/agp_i810.c
Doug Rabson e547d6fd34 Add support for Intel's i810 chipset with integrated graphics. An
associated patch to XFree86 allows the X server to work with this chipset
on FreeBSD. Additional work will include porting the Linux 3D driver.

Submitted by: Ruslan Ermilov <ru@FreeBSD.org>
2000-07-12 10:13:07 +00:00

463 lines
11 KiB
C

/*-
* Copyright (c) 2000 Doug Rabson
* Copyright (c) 2000 Ruslan Ermilov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_bus.h"
#include "opt_pci.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <pci/agppriv.h>
#include <pci/agpreg.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
MALLOC_DECLARE(M_AGP);
#define READ1(off) bus_space_read_1(sc->bst, sc->bsh, off)
#define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
struct agp_i810_softc {
struct agp_softc agp;
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
u_int32_t dcache_size;
device_t bdev; /* bridge device */
struct resource *regs; /* memory mapped GC registers */
bus_space_tag_t bst; /* bus_space tag */
bus_space_handle_t bsh; /* bus_space handle */
};
static const char*
agp_i810_match(device_t dev)
{
if (pci_get_class(dev) != PCIC_DISPLAY
|| pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
return NULL;
switch (pci_get_devid(dev)) {
case 0x71218086:
return ("Intel 82810 (i810 GMCH) SVGA controller");
case 0x71238086:
return ("Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller");
case 0x71258086:
return ("Intel 82810E (i810E GMCH) SVGA controller");
};
return NULL;
}
/*
* Find bridge device.
*/
static device_t
agp_i810_find_bridge(device_t dev)
{
device_t *children, child;
int nchildren, i;
u_int32_t devid;
/*
* XXX assume that the bridge device's ID is one minus the vga ID.
*/
devid = pci_get_devid(dev) - 0x10000;
if (device_get_children(device_get_parent(dev), &children, &nchildren))
return 0;
for (i = 0; i < nchildren; i++) {
child = children[i];
if (pci_get_devid(child) == devid) {
free(children, M_TEMP);
return child;
}
}
free(children, M_TEMP);
return 0;
}
static int
agp_i810_probe(device_t dev)
{
const char *desc;
desc = agp_i810_match(dev);
if (desc) {
device_t bdev;
u_int8_t smram;
bdev = agp_i810_find_bridge(dev);
if (!bdev) {
if (bootverbose)
printf("I810: can't find bridge device\n");
return ENXIO;
}
smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
if ((smram & AGP_I810_SMRAM_GMS)
== AGP_I810_SMRAM_GMS_DISABLED) {
if (bootverbose)
printf("I810: disabled, not probing\n");
return ENXIO;
}
device_verbose(dev);
device_set_desc(dev, desc);
return 0;
}
return ENXIO;
}
static int
agp_i810_attach(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
struct agp_gatt *gatt;
int error, rid;
sc->bdev = agp_i810_find_bridge(dev);
if (!sc->bdev)
return ENOENT;
error = agp_generic_attach(dev);
if (error)
return error;
rid = AGP_I810_MMADR;
sc->regs = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
0, ~0, 1, RF_ACTIVE);
if (!sc->regs) {
agp_generic_detach(dev);
return ENOMEM;
}
sc->bst = rman_get_bustag(sc->regs);
sc->bsh = rman_get_bushandle(sc->regs);
sc->initial_aperture = AGP_GET_APERTURE(dev);
if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
sc->dcache_size = 4 * 1024 * 1024;
else
sc->dcache_size = 0;
for (;;) {
gatt = agp_alloc_gatt(dev);
if (gatt)
break;
/*
* Probably contigmalloc failure. Try reducing the
* aperture so that the gatt size reduces.
*/
if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
agp_generic_detach(dev);
return ENOMEM;
}
}
sc->gatt = gatt;
/* Install the GATT. */
WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
/*
* Make sure the chipset can see everything.
*/
agp_flush_cache();
return 0;
}
static int
agp_i810_detach(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
int error;
error = agp_generic_detach(dev);
if (error)
return error;
/* Clear the GATT base. */
WRITE4(AGP_I810_PGTBL_CTL, 0);
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(dev, sc->initial_aperture);
agp_free_gatt(sc->gatt);
bus_release_resource(dev, SYS_RES_MEMORY,
AGP_I810_MMADR, sc->regs);
return 0;
}
static u_int32_t
agp_i810_get_aperture(device_t dev)
{
struct agp_i810_softc *sc = device_get_softc(dev);
u_int16_t miscc;
miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
return 32 * 1024 * 1024;
else
return 64 * 1024 * 1024;
}
static int
agp_i810_set_aperture(device_t dev, u_int32_t aperture)
{
struct agp_i810_softc *sc = device_get_softc(dev);
u_int16_t miscc;
/*
* Double check for sanity.
*/
if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
device_printf(dev, "bad aperture size %d\n", aperture);
return EINVAL;
}
miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
miscc &= ~AGP_I810_MISCC_WINSIZE;
if (aperture == 32 * 1024 * 1024)
miscc |= AGP_I810_MISCC_WINSIZE_32;
else
miscc |= AGP_I810_MISCC_WINSIZE_64;
pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
return 0;
}
static int
agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
return 0;
}
static int
agp_i810_unbind_page(device_t dev, int offset)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
return 0;
}
/*
* Writing via memory mapped registers already flushes all TLBs.
*/
static void
agp_i810_flush_tlb(device_t dev)
{
}
static int
agp_i810_enable(device_t dev, u_int32_t mode)
{
return 0;
}
static struct agp_memory *
agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
{
struct agp_i810_softc *sc = device_get_softc(dev);
struct agp_memory *mem;
if ((size & (AGP_PAGE_SIZE - 1)) != 0)
return 0;
if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
return 0;
if (type == 1) {
/*
* Mapping local DRAM into GATT.
*/
if (size != sc->dcache_size)
return 0;
} else if (type == 2) {
/*
* Bogus mapping of a single page for the hardware cursor.
*/
if (size != AGP_PAGE_SIZE)
return 0;
}
mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
mem->am_id = sc->agp.as_nextid++;
mem->am_size = size;
mem->am_type = type;
if (type != 1)
mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
atop(round_page(size)));
else
mem->am_obj = 0;
if (type == 2) {
/*
* Allocate and wire down the page now so that we can
* get its physical address.
*/
vm_page_t m;
m = vm_page_grab(mem->am_obj, 0, VM_ALLOC_ZERO|VM_ALLOC_RETRY);
vm_page_wire(m);
mem->am_physical = VM_PAGE_TO_PHYS(m);
vm_page_wakeup(m);
} else {
mem->am_physical = 0;
}
mem->am_offset = 0;
mem->am_is_bound = 0;
TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
sc->agp.as_allocated += size;
return mem;
}
static int
agp_i810_free_memory(device_t dev, struct agp_memory *mem)
{
struct agp_i810_softc *sc = device_get_softc(dev);
if (mem->am_is_bound)
return EBUSY;
if (mem->am_type == 2) {
/*
* Unwire the page which we wired in alloc_memory.
*/
vm_page_t m = vm_page_lookup(mem->am_obj, 0);
vm_page_unwire(m, 0);
}
sc->agp.as_allocated -= mem->am_size;
TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
if (mem->am_obj)
vm_object_deallocate(mem->am_obj);
free(mem, M_AGP);
return 0;
}
static int
agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
vm_offset_t offset)
{
struct agp_i810_softc *sc = device_get_softc(dev);
vm_offset_t i;
if (mem->am_type != 1)
return agp_generic_bind_memory(dev, mem, offset);
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
i | 3);
}
return 0;
}
static int
agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
{
struct agp_i810_softc *sc = device_get_softc(dev);
vm_offset_t i;
if (mem->am_type != 1)
return agp_generic_unbind_memory(dev, mem);
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
return 0;
}
static device_method_t agp_i810_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, agp_i810_probe),
DEVMETHOD(device_attach, agp_i810_attach),
DEVMETHOD(device_detach, agp_i810_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* AGP interface */
DEVMETHOD(agp_get_aperture, agp_i810_get_aperture),
DEVMETHOD(agp_set_aperture, agp_i810_set_aperture),
DEVMETHOD(agp_bind_page, agp_i810_bind_page),
DEVMETHOD(agp_unbind_page, agp_i810_unbind_page),
DEVMETHOD(agp_flush_tlb, agp_i810_flush_tlb),
DEVMETHOD(agp_enable, agp_i810_enable),
DEVMETHOD(agp_alloc_memory, agp_i810_alloc_memory),
DEVMETHOD(agp_free_memory, agp_i810_free_memory),
DEVMETHOD(agp_bind_memory, agp_i810_bind_memory),
DEVMETHOD(agp_unbind_memory, agp_i810_unbind_memory),
{ 0, 0 }
};
static driver_t agp_i810_driver = {
"agp",
agp_i810_methods,
sizeof(struct agp_i810_softc),
};
static devclass_t agp_devclass;
DRIVER_MODULE(agp_i810, pci, agp_i810_driver, agp_devclass, 0, 0);