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NetBSD/sys/dev/pci/agp_i810.c

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/* $NetBSD: agp_i810.c,v 1.22 2004/03/20 14:00:40 jdolecek Exp $ */
/*-
* 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: src/sys/pci/agp_i810.c,v 1.4 2001/07/05 21:28:47 jhb Exp $
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: agp_i810.c,v 1.22 2004/03/20 14:00:40 jdolecek Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <uvm/uvm_extern.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/agpvar.h>
#include <dev/pci/agpreg.h>
#include <sys/agpio.h>
#include <machine/bus.h>
#include "agp_intel.h"
#define READ1(off) bus_space_read_1(isc->bst, isc->bsh, off)
#define READ4(off) bus_space_read_4(isc->bst, isc->bsh, off)
#define WRITE4(off,v) bus_space_write_4(isc->bst, isc->bsh, off, v)
#define CHIP_I810 0 /* i810/i815 */
#define CHIP_I830 1 /* 830M/845G */
#define CHIP_I855 2 /* 852GM/855GM/865G */
struct agp_i810_softc {
u_int32_t initial_aperture; /* aperture size at startup */
struct agp_gatt *gatt;
int chiptype; /* i810-like or i830 */
u_int32_t dcache_size; /* i810 only */
u_int32_t stolen; /* number of i830/845 gtt entries
for stolen memory */
bus_space_tag_t bst; /* bus_space tag */
bus_space_handle_t bsh; /* bus_space handle */
struct pci_attach_args vga_pa;
};
static u_int32_t agp_i810_get_aperture(struct agp_softc *);
static int agp_i810_set_aperture(struct agp_softc *, u_int32_t);
static int agp_i810_bind_page(struct agp_softc *, off_t, bus_addr_t);
static int agp_i810_unbind_page(struct agp_softc *, off_t);
static void agp_i810_flush_tlb(struct agp_softc *);
static int agp_i810_enable(struct agp_softc *, u_int32_t mode);
static struct agp_memory *agp_i810_alloc_memory(struct agp_softc *, int,
vsize_t);
static int agp_i810_free_memory(struct agp_softc *, struct agp_memory *);
static int agp_i810_bind_memory(struct agp_softc *, struct agp_memory *, off_t);
static int agp_i810_unbind_memory(struct agp_softc *, struct agp_memory *);
struct agp_methods agp_i810_methods = {
agp_i810_get_aperture,
agp_i810_set_aperture,
agp_i810_bind_page,
agp_i810_unbind_page,
agp_i810_flush_tlb,
agp_i810_enable,
agp_i810_alloc_memory,
agp_i810_free_memory,
agp_i810_bind_memory,
agp_i810_unbind_memory,
};
/* XXXthorpej -- duplicated code (see arch/i386/pci/pchb.c) */
static int
agp_i810_vgamatch(struct pci_attach_args *pa)
{
if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY ||
PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_DISPLAY_VGA)
return (0);
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_82810_GC:
case PCI_PRODUCT_INTEL_82810_DC100_GC:
case PCI_PRODUCT_INTEL_82810E_GC:
case PCI_PRODUCT_INTEL_82815_FULL_GRAPH:
case PCI_PRODUCT_INTEL_82830MP_IV:
case PCI_PRODUCT_INTEL_82845G_IGD:
case PCI_PRODUCT_INTEL_82855GM_IGD:
case PCI_PRODUCT_INTEL_82865_IGD:
return (1);
}
return (0);
}
int
agp_i810_attach(struct device *parent, struct device *self, void *aux)
{
struct agp_softc *sc = (void *)self;
struct agp_i810_softc *isc;
struct agp_gatt *gatt;
int error;
isc = malloc(sizeof *isc, M_AGP, M_NOWAIT|M_ZERO);
if (isc == NULL) {
aprint_error(": can't allocate chipset-specific softc\n");
return ENOMEM;
}
sc->as_chipc = isc;
sc->as_methods = &agp_i810_methods;
if (pci_find_device(&isc->vga_pa, agp_i810_vgamatch) == 0) {
#if NAGP_INTEL > 0
const struct pci_attach_args *pa = aux;
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_82840_HB:
case PCI_PRODUCT_INTEL_82865_HB:
case PCI_PRODUCT_INTEL_82845G_DRAM:
return agp_intel_attach(parent, self, aux);
}
#endif
aprint_error(": can't find internal VGA device config space\n");
free(isc, M_AGP);
return ENOENT;
}
/* XXXfvdl */
sc->as_dmat = isc->vga_pa.pa_dmat;
error = agp_map_aperture(&isc->vga_pa, sc);
if (error != 0) {
aprint_error(": can't map aperture\n");
free(isc, M_AGP);
return error;
}
switch (PCI_PRODUCT(isc->vga_pa.pa_id)) {
case PCI_PRODUCT_INTEL_82810_GC:
case PCI_PRODUCT_INTEL_82810_DC100_GC:
case PCI_PRODUCT_INTEL_82810E_GC:
case PCI_PRODUCT_INTEL_82815_FULL_GRAPH:
isc->chiptype = CHIP_I810;
break;
case PCI_PRODUCT_INTEL_82830MP_IV:
case PCI_PRODUCT_INTEL_82845G_IGD:
isc->chiptype = CHIP_I830;
break;
case PCI_PRODUCT_INTEL_82855GM_IGD:
case PCI_PRODUCT_INTEL_82865_IGD:
isc->chiptype = CHIP_I855;
break;
}
error = pci_mapreg_map(&isc->vga_pa, AGP_I810_MMADR,
PCI_MAPREG_TYPE_MEM, 0, &isc->bst, &isc->bsh, NULL, NULL);
if (error != 0) {
aprint_error(": can't map mmadr registers\n");
return error;
}
isc->initial_aperture = AGP_GET_APERTURE(sc);
gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
if (!gatt) {
agp_generic_detach(sc);
return ENOMEM;
}
isc->gatt = gatt;
gatt->ag_entries = AGP_GET_APERTURE(sc) >> AGP_PAGE_SHIFT;
if (isc->chiptype == CHIP_I810) {
int dummyseg;
/* Some i810s have on-chip memory called dcache */
if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
isc->dcache_size = 4 * 1024 * 1024;
else
isc->dcache_size = 0;
/* According to the specs the gatt on the i810 must be 64k */
if (agp_alloc_dmamem(sc->as_dmat, 64 * 1024,
0, &gatt->ag_dmamap, (caddr_t *)&gatt->ag_virtual,
&gatt->ag_physical, &gatt->ag_dmaseg, 1, &dummyseg) != 0) {
free(gatt, M_AGP);
agp_generic_detach(sc);
return ENOMEM;
}
gatt->ag_size = gatt->ag_entries * sizeof(u_int32_t);
memset(gatt->ag_virtual, 0, gatt->ag_size);
agp_flush_cache();
/* Install the GATT. */
WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
} else if (isc->chiptype == CHIP_I830) {
/* The i830 automatically initializes the 128k gatt on boot. */
pcireg_t reg;
u_int32_t pgtblctl;
u_int16_t gcc1;
reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I830_GCC0);
gcc1 = (u_int16_t)(reg >> 16);
switch (gcc1 & AGP_I830_GCC1_GMS) {
case AGP_I830_GCC1_GMS_STOLEN_512:
isc->stolen = (512 - 132) * 1024 / 4096;
break;
case AGP_I830_GCC1_GMS_STOLEN_1024:
isc->stolen = (1024 - 132) * 1024 / 4096;
break;
case AGP_I830_GCC1_GMS_STOLEN_8192:
isc->stolen = (8192 - 132) * 1024 / 4096;
break;
default:
isc->stolen = 0;
aprint_error(
": unknown memory configuration, disabling\n");
agp_generic_detach(sc);
return EINVAL;
}
if (isc->stolen > 0) {
aprint_error(": detected %dk stolen memory\n%s",
isc->stolen * 4, sc->as_dev.dv_xname);
}
/* GATT address is already in there, make sure it's enabled */
pgtblctl = READ4(AGP_I810_PGTBL_CTL);
pgtblctl |= 1;
WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
gatt->ag_physical = pgtblctl & ~1;
} else { /* CHIP_I855 */
/* The 855GM automatically initializes the 128k gatt on boot. */
pcireg_t reg;
u_int32_t pgtblctl;
u_int16_t gcc1;
reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I855_GCC1);
gcc1 = (u_int16_t)(reg >> 16);
switch (gcc1 & AGP_I855_GCC1_GMS) {
case AGP_I855_GCC1_GMS_STOLEN_1M:
isc->stolen = (1024 - 132) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_4M:
isc->stolen = (4096 - 132) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_8M:
isc->stolen = (8192 - 132) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_16M:
isc->stolen = (16384 - 132) * 1024 / 4096;
break;
case AGP_I855_GCC1_GMS_STOLEN_32M:
isc->stolen = (32768 - 132) * 1024 / 4096;
break;
default:
isc->stolen = 0;
aprint_error(
": unknown memory configuration, disabling\n");
agp_generic_detach(sc);
return EINVAL;
}
if (isc->stolen > 0) {
aprint_error(": detected %dk stolen memory\n%s",
isc->stolen * 4, sc->as_dev.dv_xname);
}
/* GATT address is already in there, make sure it's enabled */
pgtblctl = READ4(AGP_I810_PGTBL_CTL);
pgtblctl |= 1;
WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
gatt->ag_physical = pgtblctl & ~1;
}
/*
* Make sure the chipset can see everything.
*/
agp_flush_cache();
return 0;
}
#if 0
static int
agp_i810_detach(struct agp_softc *sc)
{
int error;
struct agp_i810_softc *isc = sc->as_chipc;
error = agp_generic_detach(sc);
if (error)
return error;
/* Clear the GATT base. */
if (sc->chiptype == CHIP_I810) {
WRITE4(AGP_I810_PGTBL_CTL, 0);
} else {
unsigned int pgtblctl;
pgtblctl = READ4(AGP_I810_PGTBL_CTL);
pgtblctl &= ~1;
WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
}
/* Put the aperture back the way it started. */
AGP_SET_APERTURE(sc, isc->initial_aperture);
if (sc->chiptype == CHIP_I810) {
agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap,
(caddr_t)gatt->ag_virtual, &gatt->ag_dmaseg, 1);
}
free(sc->gatt, M_AGP);
return 0;
}
#endif
static u_int32_t
agp_i810_get_aperture(struct agp_softc *sc)
{
struct agp_i810_softc *isc = sc->as_chipc;
pcireg_t reg;
if (isc->chiptype == CHIP_I810) {
u_int16_t miscc;
reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM);
miscc = (u_int16_t)(reg >> 16);
if ((miscc & AGP_I810_MISCC_WINSIZE) ==
AGP_I810_MISCC_WINSIZE_32)
return 32 * 1024 * 1024;
else
return 64 * 1024 * 1024;
} else if (isc->chiptype == CHIP_I830) {
u_int16_t gcc1;
reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I830_GCC0);
gcc1 = (u_int16_t)(reg >> 16);
if ((gcc1 & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
return 64 * 1024 * 1024;
else
return 128 * 1024 * 1024;
} else { /* CHIP_I855 */
return 128 * 1024 * 1024;
}
}
static int
agp_i810_set_aperture(struct agp_softc *sc, u_int32_t aperture)
{
struct agp_i810_softc *isc = sc->as_chipc;
pcireg_t reg;
if (isc->chiptype == CHIP_I810) {
u_int16_t miscc;
/*
* Double check for sanity.
*/
if (aperture != (32 * 1024 * 1024) &&
aperture != (64 * 1024 * 1024)) {
printf("%s: bad aperture size %d\n",
sc->as_dev.dv_xname, aperture);
return EINVAL;
}
reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM);
miscc = (u_int16_t)(reg >> 16);
miscc &= ~AGP_I810_MISCC_WINSIZE;
if (aperture == 32 * 1024 * 1024)
miscc |= AGP_I810_MISCC_WINSIZE_32;
else
miscc |= AGP_I810_MISCC_WINSIZE_64;
reg &= 0x0000ffff;
reg |= ((pcireg_t)miscc) << 16;
pci_conf_write(sc->as_pc, sc->as_tag, AGP_I810_SMRAM, reg);
} if (isc->chiptype == CHIP_I830) {
u_int16_t gcc1;
if (aperture != (64 * 1024 * 1024) &&
aperture != (128 * 1024 * 1024)) {
printf("%s: bad aperture size %d\n",
sc->as_dev.dv_xname, aperture);
return EINVAL;
}
reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I830_GCC0);
gcc1 = (u_int16_t)(reg >> 16);
gcc1 &= ~AGP_I830_GCC1_GMASIZE;
if (aperture == 64 * 1024 * 1024)
gcc1 |= AGP_I830_GCC1_GMASIZE_64;
else
gcc1 |= AGP_I830_GCC1_GMASIZE_128;
reg &= 0x0000ffff;
reg |= ((pcireg_t)gcc1) << 16;
pci_conf_write(sc->as_pc, sc->as_tag, AGP_I830_GCC0, reg);
} else { /* CHIP_I855 */
if (aperture != 128 * 1024 * 1024) {
printf("%s: bad aperture size %d\n",
sc->as_dev.dv_xname, aperture);
return EINVAL;
}
}
return 0;
}
static int
agp_i810_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical)
{
struct agp_i810_softc *isc = sc->as_chipc;
if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
#ifdef DEBUG
printf("%s: failed: offset 0x%08x, shift %d, entries %d\n",
sc->as_dev.dv_xname, (int)offset, AGP_PAGE_SHIFT,
isc->gatt->ag_entries);
#endif
return EINVAL;
}
if (isc->chiptype != CHIP_I830) {
if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) {
#ifdef DEBUG
printf("%s: trying to bind into stolen memory",
sc->as_dev.dv_xname);
#endif
return EINVAL;
}
}
WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4,
physical | 1);
return 0;
}
static int
agp_i810_unbind_page(struct agp_softc *sc, off_t offset)
{
struct agp_i810_softc *isc = sc->as_chipc;
if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT))
return EINVAL;
if (isc->chiptype != CHIP_I810 ) {
if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) {
#ifdef DEBUG
printf("%s: trying to unbind from stolen memory",
sc->as_dev.dv_xname);
#endif
return EINVAL;
}
}
WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 0);
return 0;
}
/*
* Writing via memory mapped registers already flushes all TLBs.
*/
static void
agp_i810_flush_tlb(struct agp_softc *sc)
{
}
static int
agp_i810_enable(struct agp_softc *sc, u_int32_t mode)
{
return 0;
}
static struct agp_memory *
agp_i810_alloc_memory(struct agp_softc *sc, int type, vsize_t size)
{
struct agp_i810_softc *isc = sc->as_chipc;
struct agp_memory *mem;
if ((size & (AGP_PAGE_SIZE - 1)) != 0)
return 0;
if (sc->as_allocated + size > sc->as_maxmem)
return 0;
if (type == 1) {
/*
* Mapping local DRAM into GATT.
*/
if (isc->chiptype != CHIP_I810 )
return 0;
if (size != isc->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|M_ZERO);
if (mem == NULL)
return NULL;
mem->am_id = sc->as_nextid++;
mem->am_size = size;
mem->am_type = type;
if (type == 2) {
/*
* Allocate and wire down the page now so that we can
* get its physical address.
*/
mem->am_dmaseg = malloc(sizeof *mem->am_dmaseg, M_AGP,
M_WAITOK);
if (mem->am_dmaseg == NULL) {
free(mem, M_AGP);
return NULL;
}
if (agp_alloc_dmamem(sc->as_dmat, size, 0,
&mem->am_dmamap, &mem->am_virtual, &mem->am_physical,
mem->am_dmaseg, 1, &mem->am_nseg) != 0) {
free(mem->am_dmaseg, M_AGP);
free(mem, M_AGP);
return NULL;
}
} else if (type != 1) {
if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1,
size, 0, BUS_DMA_NOWAIT,
&mem->am_dmamap) != 0) {
free(mem, M_AGP);
return NULL;
}
}
TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
sc->as_allocated += size;
return mem;
}
static int
agp_i810_free_memory(struct agp_softc *sc, struct agp_memory *mem)
{
if (mem->am_is_bound)
return EBUSY;
if (mem->am_type == 2) {
agp_free_dmamem(sc->as_dmat, mem->am_size, mem->am_dmamap,
mem->am_virtual, mem->am_dmaseg, mem->am_nseg);
free(mem->am_dmaseg, M_AGP);
}
sc->as_allocated -= mem->am_size;
TAILQ_REMOVE(&sc->as_memory, mem, am_link);
free(mem, M_AGP);
return 0;
}
static int
agp_i810_bind_memory(struct agp_softc *sc, struct agp_memory *mem,
off_t offset)
{
struct agp_i810_softc *isc = sc->as_chipc;
u_int32_t regval, i;
/*
* XXX evil hack: the PGTBL_CTL appearently gets overwritten by the
* X server for mysterious reasons which leads to crashes if we write
* to the GTT through the MMIO window.
* Until the issue is solved, simply restore it.
*/
regval = bus_space_read_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL);
if (regval != (isc->gatt->ag_physical | 1)) {
printf("agp_i810_bind_memory: PGTBL_CTL is 0x%x - fixing\n",
regval);
bus_space_write_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL,
isc->gatt->ag_physical | 1);
}
if (mem->am_type == 2) {
WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4,
mem->am_physical | 1);
mem->am_offset = offset;
mem->am_is_bound = 1;
return 0;
}
if (mem->am_type != 1)
return agp_generic_bind_memory(sc, mem, offset);
if (isc->chiptype != CHIP_I810)
return EINVAL;
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4,
i | 3);
}
mem->am_is_bound = 1;
return 0;
}
static int
agp_i810_unbind_memory(struct agp_softc *sc, struct agp_memory *mem)
{
struct agp_i810_softc *isc = sc->as_chipc;
u_int32_t i;
if (mem->am_type == 2) {
WRITE4(AGP_I810_GTT +
(u_int32_t)(mem->am_offset >> AGP_PAGE_SHIFT) * 4,
0);
mem->am_offset = 0;
mem->am_is_bound = 0;
return 0;
}
if (mem->am_type != 1)
return agp_generic_unbind_memory(sc, mem);
if (isc->chiptype != CHIP_I810)
return EINVAL;
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
mem->am_is_bound = 0;
return 0;
}
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