/* $NetBSD: agp_i810.c,v 1.126 2024/01/29 01:05:55 riastradh 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: agp_i810.c,v 1.126 2024/01/29 01:05:55 riastradh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/atomic.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/xcall.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 <dev/pci/agp_i810var.h>
#include <sys/agpio.h>
#include <sys/bus.h>
#include "agp_intel.h"
#ifdef AGP_DEBUG
#define DPRINTF(sc, fmt, ...) \
device_printf((sc)->as_dev, "%s: " fmt, __func__, ##__VA_ARGS__)
#else
#define DPRINTF(sc, fmt, ...) do {} while (0)
#endif
struct agp_softc *agp_i810_sc = NULL;
#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 */
#define CHIP_I915 3 /* 915G/915GM/945G/945GM/945GME */
#define CHIP_I965 4 /* 965Q/965PM */
#define CHIP_G33 5 /* G33/Q33/Q35 */
#define CHIP_G4X 6 /* G45/Q45 */
#define CHIP_PINEVIEW 7 /* Pineview */
/* XXX hack, see below */
static bus_addr_t agp_i810_vga_regbase;
static bus_size_t agp_i810_vga_regsize;
static bus_space_tag_t agp_i810_vga_bst;
static bus_space_handle_t agp_i810_vga_bsh;
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_bind_memory_dcache(struct agp_softc *, struct agp_memory *,
off_t);
static int agp_i810_bind_memory_hwcursor(struct agp_softc *,
struct agp_memory *, off_t);
static int agp_i810_unbind_memory(struct agp_softc *, struct agp_memory *);
static bool agp_i810_resume(device_t, const pmf_qual_t *);
static int agp_i810_init(struct agp_softc *);
static int agp_i810_setup_chipset_flush_page(struct agp_softc *);
static void agp_i810_teardown_chipset_flush_page(struct agp_softc *);
static int agp_i810_init(struct agp_softc *);
static 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,
};
int
agp_i810_write_gtt_entry(struct agp_i810_softc *isc, off_t off,
bus_addr_t addr, int flags)
{
u_int32_t pte;
/*
* Bits 11:4 (physical start address extension) should be zero.
* Flag bits 3:0 should be zero too.
*
* XXX This should be a kassert -- no reason for this routine
* to allow failure.
*/
if ((addr & 0xfff) != 0)
return EINVAL;
KASSERT(flags == (flags & 0x7));
pte = (u_int32_t)addr;
/*
* We need to massage the pte if bus_addr_t is wider than 32 bits.
* The compiler isn't smart enough, hence the casts to uintmax_t.
*/
if (sizeof(bus_addr_t) > sizeof(u_int32_t)) {
/* 965+ can do 36-bit addressing, add in the extra bits. */
if (isc->chiptype == CHIP_I965 ||
isc->chiptype == CHIP_G33 ||
isc->chiptype == CHIP_PINEVIEW ||
isc->chiptype == CHIP_G4X) {
if (((uintmax_t)addr >> 36) != 0)
return EINVAL;
pte |= (addr >> 28) & 0xf0;
} else {
if (((uintmax_t)addr >> 32) != 0)
return EINVAL;
}
}
bus_space_write_4(isc->gtt_bst, isc->gtt_bsh,
4*(off >> AGP_PAGE_SHIFT), pte | flags);
return 0;
}
void
agp_i810_post_gtt_entry(struct agp_i810_softc *isc, off_t off)
{
/*
* See <https://bugs.freedesktop.org/show_bug.cgi?id=88191>.
* Out of paranoia, let's do the write barrier and posting
* read, because I don't have enough time or hardware to
* conduct conclusive tests.
*/
bus_space_barrier(isc->gtt_bst, isc->gtt_bsh, 0, isc->gtt_size,
BUS_SPACE_BARRIER_WRITE);
(void)bus_space_read_4(isc->gtt_bst, isc->gtt_bsh,
4*(off >> AGP_PAGE_SHIFT));
}
static void
agp_flush_cache_ipi(void *cookie __unused)
{
agp_flush_cache();
}
void
agp_i810_chipset_flush(struct agp_i810_softc *isc)
{
unsigned int timo = 20000; /* * 50 us = 1 s */
switch (isc->chiptype) {
case CHIP_I810:
break;
case CHIP_I830:
case CHIP_I855:
/*
* Flush all CPU caches. If we're cold, we can't run
* xcalls, but there should be only one CPU up, so
* flushing only the local CPU's cache should suffice.
*
* XXX Come to think of it, do these chipsets appear in
* any multi-CPU systems?
*/
if (cold) {
agp_flush_cache();
} else {
/*
* Caller may hold a spin lock, so use ipi(9)
* rather than xcall(9) here.
*/
ipi_msg_t msg = { .func = agp_flush_cache_ipi };
kpreempt_disable();
ipi_broadcast(&msg, /*skip_self*/false);
ipi_wait(&msg);
kpreempt_enable();
}
WRITE4(AGP_I830_HIC, READ4(AGP_I830_HIC) | __BIT(31));
while (ISSET(READ4(AGP_I830_HIC), __BIT(31))) {
if (timo-- == 0)
break;
DELAY(50);
}
break;
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_PINEVIEW:
case CHIP_G4X:
bus_space_write_4(isc->flush_bst, isc->flush_bsh, 0, 1);
break;
}
}
/* XXXthorpej -- duplicated code (see arch/x86/pci/pchb.c) */
static int
agp_i810_vgamatch(const 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:
case PCI_PRODUCT_INTEL_82915G_IGD:
case PCI_PRODUCT_INTEL_82915GM_IGD:
case PCI_PRODUCT_INTEL_82945P_IGD:
case PCI_PRODUCT_INTEL_82945GM_IGD:
case PCI_PRODUCT_INTEL_82945GM_IGD_1:
case PCI_PRODUCT_INTEL_82945GME_IGD:
case PCI_PRODUCT_INTEL_E7221_IGD:
case PCI_PRODUCT_INTEL_82965Q_IGD:
case PCI_PRODUCT_INTEL_82965Q_IGD_1:
case PCI_PRODUCT_INTEL_82965PM_IGD:
case PCI_PRODUCT_INTEL_82965PM_IGD_1:
case PCI_PRODUCT_INTEL_82G33_IGD:
case PCI_PRODUCT_INTEL_82G33_IGD_1:
case PCI_PRODUCT_INTEL_82965G_IGD:
case PCI_PRODUCT_INTEL_82965G_IGD_1:
case PCI_PRODUCT_INTEL_82965GME_IGD:
case PCI_PRODUCT_INTEL_82Q35_IGD:
case PCI_PRODUCT_INTEL_82Q35_IGD_1:
case PCI_PRODUCT_INTEL_82Q33_IGD:
case PCI_PRODUCT_INTEL_82Q33_IGD_1:
case PCI_PRODUCT_INTEL_82G35_IGD:
case PCI_PRODUCT_INTEL_82G35_IGD_1:
case PCI_PRODUCT_INTEL_82946GZ_IGD:
case PCI_PRODUCT_INTEL_82GM45_IGD:
case PCI_PRODUCT_INTEL_82GM45_IGD_1:
case PCI_PRODUCT_INTEL_82IGD_E_IGD:
case PCI_PRODUCT_INTEL_82Q45_IGD:
case PCI_PRODUCT_INTEL_82G45_IGD:
case PCI_PRODUCT_INTEL_82G41_IGD:
case PCI_PRODUCT_INTEL_82B43_IGD:
case PCI_PRODUCT_INTEL_IRONLAKE_D_IGD:
case PCI_PRODUCT_INTEL_IRONLAKE_M_IGD:
case PCI_PRODUCT_INTEL_PINEVIEW_IGD:
case PCI_PRODUCT_INTEL_PINEVIEW_M_IGD:
return (1);
}
return (0);
}
static int
agp_i965_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc, int reg)
{
/*
* Find the aperture. Don't map it (yet), this would
* eat KVA.
*/
if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg,
PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_64BIT, &sc->as_apaddr, &sc->as_apsize,
&sc->as_apflags) != 0)
return ENXIO;
sc->as_apt = pa->pa_memt;
return 0;
}
int
agp_i810_attach(device_t parent, device_t self, void *aux)
{
struct agp_softc *sc = device_private(self);
struct agp_i810_softc *isc;
int apbase, mmadr_bar, gtt_bar;
int mmadr_type, mmadr_flags;
bus_addr_t mmadr;
bus_size_t mmadr_size, gtt_off;
int error;
isc = malloc(sizeof *isc, M_AGP, M_WAITOK|M_ZERO);
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:
case PCI_PRODUCT_INTEL_82815_FULL_HUB:
case PCI_PRODUCT_INTEL_82855GM_MCH:
free(isc, M_AGP);
return agp_intel_attach(parent, self, aux);
}
#endif
aprint_error(": can't find internal VGA"
" config space\n");
error = ENOENT;
goto fail1;
}
/* XXXfvdl */
sc->as_dmat = isc->vga_pa.pa_dmat;
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;
aprint_normal(": i810-family chipset\n");
break;
case PCI_PRODUCT_INTEL_82830MP_IV:
case PCI_PRODUCT_INTEL_82845G_IGD:
isc->chiptype = CHIP_I830;
aprint_normal(": i830-family chipset\n");
break;
case PCI_PRODUCT_INTEL_82855GM_IGD:
case PCI_PRODUCT_INTEL_82865_IGD:
isc->chiptype = CHIP_I855;
aprint_normal(": i855-family chipset\n");
break;
case PCI_PRODUCT_INTEL_82915G_IGD:
case PCI_PRODUCT_INTEL_82915GM_IGD:
case PCI_PRODUCT_INTEL_82945P_IGD:
case PCI_PRODUCT_INTEL_82945GM_IGD:
case PCI_PRODUCT_INTEL_82945GM_IGD_1:
case PCI_PRODUCT_INTEL_82945GME_IGD:
case PCI_PRODUCT_INTEL_E7221_IGD:
isc->chiptype = CHIP_I915;
aprint_normal(": i915-family chipset\n");
break;
case PCI_PRODUCT_INTEL_82965Q_IGD:
case PCI_PRODUCT_INTEL_82965Q_IGD_1:
case PCI_PRODUCT_INTEL_82965PM_IGD:
case PCI_PRODUCT_INTEL_82965PM_IGD_1:
case PCI_PRODUCT_INTEL_82965G_IGD:
case PCI_PRODUCT_INTEL_82965G_IGD_1:
case PCI_PRODUCT_INTEL_82965GME_IGD:
case PCI_PRODUCT_INTEL_82946GZ_IGD:
case PCI_PRODUCT_INTEL_82G35_IGD:
case PCI_PRODUCT_INTEL_82G35_IGD_1:
isc->chiptype = CHIP_I965;
aprint_normal(": i965-family chipset\n");
break;
case PCI_PRODUCT_INTEL_82Q35_IGD:
case PCI_PRODUCT_INTEL_82Q35_IGD_1:
case PCI_PRODUCT_INTEL_82G33_IGD:
case PCI_PRODUCT_INTEL_82G33_IGD_1:
case PCI_PRODUCT_INTEL_82Q33_IGD:
case PCI_PRODUCT_INTEL_82Q33_IGD_1:
isc->chiptype = CHIP_G33;
aprint_normal(": G33-family chipset\n");
break;
case PCI_PRODUCT_INTEL_PINEVIEW_IGD:
case PCI_PRODUCT_INTEL_PINEVIEW_M_IGD:
isc->chiptype = CHIP_PINEVIEW;
aprint_normal(": Pineview chipset\n");
break;
case PCI_PRODUCT_INTEL_82GM45_IGD:
case PCI_PRODUCT_INTEL_82GM45_IGD_1:
case PCI_PRODUCT_INTEL_82IGD_E_IGD:
case PCI_PRODUCT_INTEL_82Q45_IGD:
case PCI_PRODUCT_INTEL_82G45_IGD:
case PCI_PRODUCT_INTEL_82G41_IGD:
case PCI_PRODUCT_INTEL_82B43_IGD:
case PCI_PRODUCT_INTEL_IRONLAKE_D_IGD:
case PCI_PRODUCT_INTEL_IRONLAKE_M_IGD:
isc->chiptype = CHIP_G4X;
aprint_normal(": G4X-family chipset\n");
break;
}
aprint_naive("\n");
/* Discriminate on the chipset to choose the relevant BARs. */
switch (isc->chiptype) {
case CHIP_I915:
case CHIP_G33:
case CHIP_PINEVIEW:
apbase = AGP_I915_GMADR;
mmadr_bar = AGP_I915_MMADR;
gtt_bar = AGP_I915_GTTADR;
gtt_off = ~(bus_size_t)0; /* XXXGCC */
break;
case CHIP_I965:
apbase = AGP_I965_GMADR;
mmadr_bar = AGP_I965_MMADR;
gtt_bar = 0;
gtt_off = AGP_I965_GTT;
break;
case CHIP_G4X:
apbase = AGP_I965_GMADR;
mmadr_bar = AGP_I965_MMADR;
gtt_bar = 0;
gtt_off = AGP_G4X_GTT;
break;
default:
apbase = AGP_I810_GMADR;
mmadr_bar = AGP_I810_MMADR;
gtt_bar = 0;
gtt_off = AGP_I810_GTT;
break;
}
/*
* Ensure the MMIO BAR is, in fact, a memory BAR.
*
* XXX This is required because we use pa_memt below. It is
* not a priori clear to me there is any other reason to
* require this.
*/
mmadr_type = pci_mapreg_type(isc->vga_pa.pa_pc, isc->vga_pa.pa_tag,
mmadr_bar);
if (PCI_MAPREG_TYPE(mmadr_type) != PCI_MAPREG_TYPE_MEM) {
aprint_error_dev(self, "non-memory device MMIO registers\n");
error = ENXIO;
goto fail1;
}
/*
* Determine the size of the MMIO registers.
*
* XXX The size of the MMIO registers we use is statically
* determined, as a function of the chipset, by the driver's
* implementation.
*
* On some chipsets, the GTT is part of the MMIO register BAR.
* We would like to map the GTT separately, so that we can map
* it prefetchable, which we can't do with the MMIO registers.
* Consequently, we would especially like to map a fixed size
* of MMIO registers, not just whatever size the BAR says.
*
* However, old drm assumes that the combined GTT/MMIO register
* space is a single bus space mapping, so mapping them
* separately breaks that. Once we rip out old drm, we can
* replace the pci_mapreg_info call by the chipset switch.
*/
#if notyet
switch (isc->chiptype) {
case CHIP_I810:
case CHIP_I830:
case CHIP_I855:
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_PINEVIEW:
case CHIP_G4X:
isc->size = 512*1024;
break;
case CHIP_SANDYBRIDGE:
case CHIP_IVYBRIDGE:
case CHIP_HASWELL:
isc->size = 2*1024*1024;
break;
}
#else
if (pci_mapreg_info(isc->vga_pa.pa_pc, isc->vga_pa.pa_tag,
mmadr_bar, mmadr_type, NULL, &isc->size, NULL))
isc->size = 512*1024;
#endif /* notyet */
/* Map (or, rather, find the address and size of) the aperture. */
if (isc->chiptype == CHIP_I965 || isc->chiptype == CHIP_G4X)
error = agp_i965_map_aperture(&isc->vga_pa, sc, apbase);
else
error = agp_map_aperture(&isc->vga_pa, sc, apbase);
if (error) {
aprint_error_dev(self, "can't map aperture: %d\n", error);
goto fail1;
}
/* Map the memory-mapped I/O registers, or the non-GTT part. */
if (pci_mapreg_info(isc->vga_pa.pa_pc, isc->vga_pa.pa_tag, mmadr_bar,
mmadr_type, &mmadr, &mmadr_size, &mmadr_flags)) {
aprint_error_dev(self, "can't find MMIO registers\n");
error = ENXIO;
goto fail1;
}
if (mmadr_size < isc->size) {
aprint_error_dev(self, "MMIO registers too small"
": %"PRIuMAX" < %"PRIuMAX"\n",
(uintmax_t)mmadr_size, (uintmax_t)isc->size);
error = ENXIO;
goto fail1;
}
isc->bst = isc->vga_pa.pa_memt;
error = bus_space_map(isc->bst, mmadr, isc->size, mmadr_flags,
&isc->bsh);
if (error) {
aprint_error_dev(self, "can't map MMIO registers: %d\n",
error);
error = ENXIO;
goto fail1;
}
/* Set up a chipset flush page if necessary. */
switch (isc->chiptype) {
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_PINEVIEW:
case CHIP_G4X:
error = agp_i810_setup_chipset_flush_page(sc);
if (error) {
aprint_error_dev(self,
"can't set up chipset flush page: %d\n", error);
goto fail2;
}
break;
}
/*
* XXX horrible hack to allow drm code to use our mapping
* of VGA chip registers
*/
agp_i810_vga_regbase = mmadr;
agp_i810_vga_regsize = isc->size;
agp_i810_vga_bst = isc->bst;
agp_i810_vga_bsh = isc->bsh;
/* Initialize the chipset. */
error = agp_i810_init(sc);
if (error)
goto fail3;
/* Map the GTT, from either part of the MMIO region or its own BAR. */
if (gtt_bar == 0) {
isc->gtt_bst = isc->bst;
if ((mmadr_size - gtt_off) < isc->gtt_size) {
aprint_error_dev(self, "GTTMMADR too small for GTT"
": (%"PRIxMAX" - %"PRIxMAX") < %"PRIxMAX"\n",
(uintmax_t)mmadr_size,
(uintmax_t)gtt_off,
(uintmax_t)isc->gtt_size);
error = ENXIO;
goto fail4;
}
/*
* Map the GTT separately if we can, so that we can map
* it prefetchable, but in early models, there are MMIO
* registers before and after the GTT, so we can only
* take a subregion.
*/
if (isc->size < gtt_off)
error = bus_space_map(isc->gtt_bst, (mmadr + gtt_off),
isc->gtt_size, mmadr_flags, &isc->gtt_bsh);
else
error = bus_space_subregion(isc->bst, isc->bsh,
gtt_off, isc->gtt_size, &isc->gtt_bsh);
if (error) {
aprint_error_dev(self, "can't map GTT: %d\n", error);
error = ENXIO;
goto fail4;
}
} else {
bus_size_t gtt_bar_size;
/*
* All chipsets with a separate BAR for the GTT, namely
* the i915 and G33 families, have 32-bit GTT BARs.
*
* XXX [citation needed]
*/
if (pci_mapreg_map(&isc->vga_pa, gtt_bar, PCI_MAPREG_TYPE_MEM,
0,
&isc->gtt_bst, &isc->gtt_bsh, NULL, >t_bar_size)) {
aprint_error_dev(self, "can't map GTT\n");
error = ENXIO;
goto fail4;
}
if (gtt_bar_size != isc->gtt_size) {
aprint_error_dev(self,
"BAR size %"PRIxMAX
" mismatches detected GTT size %"PRIxMAX
"; trusting BAR\n",
(uintmax_t)gtt_bar_size,
(uintmax_t)isc->gtt_size);
isc->gtt_size = gtt_bar_size;
}
}
/* Power management. (XXX Nothing to save on suspend? Fishy...) */
if (!pmf_device_register(self, NULL, agp_i810_resume))
aprint_error_dev(self, "can't establish power handler\n");
/* Match the generic AGP code's autoconf output format. */
aprint_normal("%s", device_xname(self));
/* Success! */
return 0;
fail5: __unused
pmf_device_deregister(self);
if ((gtt_bar != 0) || (isc->size < gtt_off))
bus_space_unmap(isc->gtt_bst, isc->gtt_bsh, isc->gtt_size);
isc->gtt_size = 0;
fail4:
#if notyet
agp_i810_fini(sc);
#endif
fail3: switch (isc->chiptype) {
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_PINEVIEW:
case CHIP_G4X:
agp_i810_teardown_chipset_flush_page(sc);
break;
}
fail2: bus_space_unmap(isc->bst, isc->bsh, isc->size);
isc->size = 0;
fail1: free(isc, M_AGP);
sc->as_chipc = NULL;
agp_generic_detach(sc);
KASSERT(error);
return error;
}
/*
* Skip pages reserved by the BIOS. Notably, skip 0xa0000-0xfffff,
* which includes the video BIOS at 0xc0000-0xdffff which the display
* drivers need for video mode detection.
*
* XXX Is there an MI name for this, or a conventional x86 name? Or
* should we really use bus_dma instead?
*/
#define PCIBIOS_MIN_MEM 0x100000
static int
agp_i810_setup_chipset_flush_page(struct agp_softc *sc)
{
struct agp_i810_softc *const isc = sc->as_chipc;
const pci_chipset_tag_t pc = sc->as_pc;
const pcitag_t tag = sc->as_tag;
pcireg_t lo, hi;
bus_addr_t addr, minaddr, maxaddr;
int error;
/* We always use memory-mapped I/O. */
isc->flush_bst = isc->vga_pa.pa_memt;
/* No page allocated yet. */
isc->flush_addr = 0;
/* Read the PCI config register: 4-byte on gen3, 8-byte on gen>=4. */
if (isc->chiptype == CHIP_I915) {
addr = pci_conf_read(pc, tag, AGP_I915_IFPADDR);
minaddr = PCIBIOS_MIN_MEM;
maxaddr = UINT32_MAX;
} else {
hi = pci_conf_read(pc, tag, AGP_I965_IFPADDR+4);
lo = pci_conf_read(pc, tag, AGP_I965_IFPADDR);
/*
* Convert to uint64_t, rather than bus_addr_t which
* may be 32-bit, to avoid undefined behaviour with a
* too-wide shift. Since the BIOS doesn't know whether
* the OS will run 64-bit or with PAE, it ought to
* configure at most a 32-bit physical address, so
* let's print a warning in case that happens.
*/
addr = ((uint64_t)hi << 32) | lo;
if (hi) {
aprint_error_dev(sc->as_dev,
"BIOS configured >32-bit flush page address"
": %"PRIx64"\n", ((uint64_t)hi << 32) | lo);
#if __i386__ && !PAE
return EIO;
#endif
}
minaddr = PCIBIOS_MIN_MEM;
maxaddr = MIN(UINT64_MAX, ~(bus_addr_t)0);
}
/* Allocate or map a pre-allocated a page for it. */
if (ISSET(addr, 1)) {
/* BIOS allocated it for us. Use that. */
error = bus_space_map(isc->flush_bst, addr & ~1, PAGE_SIZE, 0,
&isc->flush_bsh);
if (error)
return error;
} else {
/* None allocated. Allocate one. */
error = bus_space_alloc(isc->flush_bst, minaddr, maxaddr,
PAGE_SIZE, PAGE_SIZE, 0, 0,
&isc->flush_addr, &isc->flush_bsh);
if (error)
return error;
KASSERT(isc->flush_addr != 0);
/* Write it into the PCI config register. */
addr = isc->flush_addr | 1;
if (isc->chiptype == CHIP_I915) {
pci_conf_write(pc, tag, AGP_I915_IFPADDR, addr);
} else {
hi = __SHIFTOUT(addr, __BITS(63, 32));
lo = __SHIFTOUT(addr, __BITS(31, 0));
pci_conf_write(pc, tag, AGP_I965_IFPADDR+4, hi);
pci_conf_write(pc, tag, AGP_I965_IFPADDR, lo);
}
}
/* Success! */
return 0;
}
static void
agp_i810_teardown_chipset_flush_page(struct agp_softc *sc)
{
struct agp_i810_softc *const isc = sc->as_chipc;
if (isc->flush_addr) {
/* If we allocated a page, clear it. */
if (isc->chiptype == CHIP_I915) {
pci_conf_write(sc->as_pc, sc->as_tag, AGP_I915_IFPADDR,
0);
} else {
pci_conf_write(sc->as_pc, sc->as_tag,
AGP_I965_IFPADDR, 0);
pci_conf_write(sc->as_pc, sc->as_tag,
AGP_I965_IFPADDR + 4, 0);
}
isc->flush_addr = 0;
bus_space_free(isc->flush_bst, isc->flush_bsh, PAGE_SIZE);
} else {
/* Otherwise, just unmap the pre-allocated page. */
bus_space_unmap(isc->flush_bst, isc->flush_bsh, PAGE_SIZE);
}
}
/*
* XXX horrible hack to allow drm code to use our mapping
* of VGA chip registers
*/
int
agp_i810_borrow(bus_addr_t base, bus_size_t size, bus_space_handle_t *hdlp)
{
if (agp_i810_vga_regbase == 0)
return 0;
if (base < agp_i810_vga_regbase)
return 0;
if (agp_i810_vga_regsize < size)
return 0;
if ((base - agp_i810_vga_regbase) > (agp_i810_vga_regsize - size))
return 0;
if (bus_space_subregion(agp_i810_vga_bst, agp_i810_vga_bsh,
(base - agp_i810_vga_regbase), (agp_i810_vga_regsize - size),
hdlp))
return 0;
return 1;
}
static int
agp_i810_init(struct agp_softc *sc)
{
struct agp_i810_softc *isc;
int error;
isc = sc->as_chipc;
if (isc->chiptype == CHIP_I810) {
struct agp_gatt *gatt;
void *virtual;
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 */
isc->gtt_size = 64 * 1024;
gatt = malloc(sizeof(*gatt), M_AGP, M_WAITOK);
gatt->ag_entries = isc->gtt_size / sizeof(uint32_t);
error = agp_alloc_dmamem(sc->as_dmat, isc->gtt_size,
0, &gatt->ag_dmamap, &virtual, &gatt->ag_physical,
&gatt->ag_dmaseg, 1, &dummyseg);
if (error) {
aprint_error_dev(sc->as_dev,
"can't allocate memory for GTT: %d\n", error);
free(gatt, M_AGP);
goto fail0;
}
gatt->ag_virtual = (uint32_t *)virtual;
gatt->ag_size = gatt->ag_entries * sizeof(uint32_t);
memset(gatt->ag_virtual, 0, gatt->ag_size);
agp_flush_cache();
/* Install the GATT. */
isc->pgtblctl = gatt->ag_physical | 1;
WRITE4(AGP_I810_PGTBL_CTL, isc->pgtblctl);
isc->gatt = gatt;
} else if (isc->chiptype == CHIP_I830) {
/* The i830 automatically initializes the 128k gatt on boot. */
/* XXX [citation needed] */
pcireg_t reg;
u_int16_t gcc1;
isc->gtt_size = 128 * 1024;
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_dev(sc->as_dev,
"unknown memory configuration, disabling\n");
error = ENXIO;
goto fail0;
}
if (isc->stolen > 0) {
aprint_normal_dev(sc->as_dev,
"detected %dk stolen memory\n",
isc->stolen * 4);
}
/* GATT address is already in there, make sure it's enabled */
isc->pgtblctl = READ4(AGP_I810_PGTBL_CTL);
isc->pgtblctl |= 1;
WRITE4(AGP_I810_PGTBL_CTL, isc->pgtblctl);
} else if (isc->chiptype == CHIP_I855 || isc->chiptype == CHIP_I915 ||
isc->chiptype == CHIP_I965 || isc->chiptype == CHIP_G33 ||
isc->chiptype == CHIP_PINEVIEW ||
isc->chiptype == CHIP_G4X) {
pcireg_t reg;
u_int32_t gtt_size, stolen; /* XXX kilobytes */
u_int16_t gcc1;
reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I855_GCC1);
gcc1 = (u_int16_t)(reg >> 16);
isc->pgtblctl = READ4(AGP_I810_PGTBL_CTL);
/* Stolen memory is set up at the beginning of the aperture by
* the BIOS, consisting of the GATT followed by 4kb for the
* BIOS display.
*/
switch (isc->chiptype) {
case CHIP_I855:
gtt_size = 128;
break;
case CHIP_I915:
gtt_size = 256;
break;
case CHIP_I965:
switch (isc->pgtblctl & AGP_I810_PGTBL_SIZE_MASK) {
case AGP_I810_PGTBL_SIZE_128KB:
case AGP_I810_PGTBL_SIZE_512KB:
gtt_size = 512;
break;
case AGP_I965_PGTBL_SIZE_1MB:
gtt_size = 1024;
break;
case AGP_I965_PGTBL_SIZE_2MB:
gtt_size = 2048;
break;
case AGP_I965_PGTBL_SIZE_1_5MB:
gtt_size = 1024 + 512;
break;
default:
aprint_error_dev(sc->as_dev,
"bad PGTBL size\n");
error = ENXIO;
goto fail0;
}
break;
case CHIP_G33:
switch (gcc1 & AGP_G33_PGTBL_SIZE_MASK) {
case AGP_G33_PGTBL_SIZE_1M:
gtt_size = 1024;
break;
case AGP_G33_PGTBL_SIZE_2M:
gtt_size = 2048;
break;
default:
aprint_error_dev(sc->as_dev,
"bad PGTBL size\n");
error = ENXIO;
goto fail0;
}
break;
case CHIP_PINEVIEW:
switch (gcc1 & AGP_PINEVIEW_PGTBL_SIZE_MASK) {
case AGP_PINEVIEW_PGTBL_SIZE_1M:
gtt_size = 1024;
break;
default:
aprint_error_dev(sc->as_dev,
"bad PGTBL size\n");
error = ENXIO;
goto fail0;
}
break;
case CHIP_G4X:
switch (isc->pgtblctl & AGP_G4X_PGTBL_SIZE_MASK) {
case AGP_G4X_PGTBL_SIZE_512K:
gtt_size = 512;
break;
case AGP_G4X_PGTBL_SIZE_256K:
gtt_size = 256;
break;
case AGP_G4X_PGTBL_SIZE_128K:
gtt_size = 128;
break;
case AGP_G4X_PGTBL_SIZE_1M:
gtt_size = 1*1024;
break;
case AGP_G4X_PGTBL_SIZE_2M:
gtt_size = 2*1024;
break;
case AGP_G4X_PGTBL_SIZE_1_5M:
gtt_size = 1*1024 + 512;
break;
default:
aprint_error_dev(sc->as_dev,
"bad PGTBL size\n");
error = ENXIO;
goto fail0;
}
break;
default:
panic("impossible chiptype %d", isc->chiptype);
}
/*
* XXX If I'm reading the datasheets right, this stolen
* memory detection logic is totally wrong.
*/
switch (gcc1 & AGP_I855_GCC1_GMS) {
case AGP_I855_GCC1_GMS_STOLEN_1M:
stolen = 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_4M:
stolen = 4 * 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_8M:
stolen = 8 * 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_16M:
stolen = 16 * 1024;
break;
case AGP_I855_GCC1_GMS_STOLEN_32M:
stolen = 32 * 1024;
break;
case AGP_I915_GCC1_GMS_STOLEN_48M:
stolen = 48 * 1024;
break;
case AGP_I915_GCC1_GMS_STOLEN_64M:
stolen = 64 * 1024;
break;
case AGP_G33_GCC1_GMS_STOLEN_128M:
stolen = 128 * 1024;
break;
case AGP_G33_GCC1_GMS_STOLEN_256M:
stolen = 256 * 1024;
break;
case AGP_G4X_GCC1_GMS_STOLEN_96M:
stolen = 96 * 1024;
break;
case AGP_G4X_GCC1_GMS_STOLEN_160M:
stolen = 160 * 1024;
break;
case AGP_G4X_GCC1_GMS_STOLEN_224M:
stolen = 224 * 1024;
break;
case AGP_G4X_GCC1_GMS_STOLEN_352M:
stolen = 352 * 1024;
break;
default:
aprint_error_dev(sc->as_dev,
"unknown memory configuration, disabling\n");
error = ENXIO;
goto fail0;
}
switch (gcc1 & AGP_I855_GCC1_GMS) {
case AGP_I915_GCC1_GMS_STOLEN_48M:
case AGP_I915_GCC1_GMS_STOLEN_64M:
if (isc->chiptype != CHIP_I915 &&
isc->chiptype != CHIP_I965 &&
isc->chiptype != CHIP_G33 &&
isc->chiptype != CHIP_PINEVIEW &&
isc->chiptype != CHIP_G4X)
stolen = 0;
break;
case AGP_G33_GCC1_GMS_STOLEN_128M:
case AGP_G33_GCC1_GMS_STOLEN_256M:
if (isc->chiptype != CHIP_I965 &&
isc->chiptype != CHIP_G33 &&
isc->chiptype != CHIP_PINEVIEW &&
isc->chiptype != CHIP_G4X)
stolen = 0;
break;
case AGP_G4X_GCC1_GMS_STOLEN_96M:
case AGP_G4X_GCC1_GMS_STOLEN_160M:
case AGP_G4X_GCC1_GMS_STOLEN_224M:
case AGP_G4X_GCC1_GMS_STOLEN_352M:
if (isc->chiptype != CHIP_I965 &&
isc->chiptype != CHIP_G4X)
stolen = 0;
break;
}
isc->gtt_size = gtt_size * 1024;
/* BIOS space */
/* XXX [citation needed] */
gtt_size += 4;
/* XXX [citation needed] for this subtraction */
isc->stolen = (stolen - gtt_size) * 1024 / 4096;
if (isc->stolen > 0) {
aprint_normal_dev(sc->as_dev,
"detected %dk stolen memory\n",
isc->stolen * 4);
}
/* GATT address is already in there, make sure it's enabled */
isc->pgtblctl |= 1;
WRITE4(AGP_I810_PGTBL_CTL, isc->pgtblctl);
}
/*
* Make sure the chipset can see everything.
*/
agp_flush_cache();
/*
* Publish what we found for kludgey drivers (I'm looking at
* you, drm).
*/
if (agp_i810_sc == NULL)
agp_i810_sc = sc;
else
aprint_error_dev(sc->as_dev, "agp already attached\n");
/* Success! */
return 0;
fail0: KASSERT(error);
return error;
}
#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;
switch (isc->chiptype) {
case CHIP_I915:
case CHIP_I965:
case CHIP_G33:
case CHIP_PINEVIEW:
case CHIP_G4X:
agp_i810_teardown_chipset_flush_page(sc);
break;
}
/* 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);
}
if (sc->chiptype == CHIP_I810) {
agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap,
(void *)gatt->ag_virtual, &gatt->ag_dmaseg, 1);
free(isc->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;
u_int32_t size;
u_int16_t miscc, gcc1;
size = 0;
switch (isc->chiptype) {
case CHIP_I810:
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)
size = 32 * 1024 * 1024;
else
size = 64 * 1024 * 1024;
break;
case CHIP_I830:
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)
size = 64 * 1024 * 1024;
else
size = 128 * 1024 * 1024;
break;
case CHIP_I855:
size = 128 * 1024 * 1024;
break;
case CHIP_I915:
case CHIP_G33:
case CHIP_PINEVIEW:
case CHIP_G4X:
size = sc->as_apsize;
break;
case CHIP_I965:
size = 512 * 1024 * 1024;
break;
default:
aprint_error(": Unknown chipset\n");
}
return size;
}
static int
agp_i810_set_aperture(struct agp_softc *sc __unused,
uint32_t aperture __unused)
{
return ENOSYS;
}
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->gtt_size/4) << AGP_PAGE_SHIFT)) {
DPRINTF(sc, "failed"
": offset 0x%"PRIxMAX", shift %u, entries %"PRIuMAX"\n",
(uintmax_t)offset,
(unsigned)AGP_PAGE_SHIFT,
(uintmax_t)isc->gtt_size/4);
return EINVAL;
}
if (isc->chiptype != CHIP_I810) {
if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) {
DPRINTF(sc, "trying to bind into stolen memory\n");
return EINVAL;
}
}
return agp_i810_write_gtt_entry(isc, offset, physical,
AGP_I810_GTT_VALID);
}
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->gtt_size/4) << AGP_PAGE_SHIFT))
return EINVAL;
if (isc->chiptype != CHIP_I810 ) {
if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) {
DPRINTF(sc, "trying to unbind from stolen memory\n");
return EINVAL;
}
}
return agp_i810_write_gtt_entry(isc, offset, 0, 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;
}
#define AGP_I810_MEMTYPE_MAIN 0
#define AGP_I810_MEMTYPE_DCACHE 1
#define AGP_I810_MEMTYPE_HWCURSOR 2
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;
int error;
DPRINTF(sc, "AGP: alloc(%d, 0x%"PRIxMAX")\n", type, (uintmax_t)size);
if (size <= 0)
return NULL;
if ((size & (AGP_PAGE_SIZE - 1)) != 0)
return NULL;
KASSERT(sc->as_allocated <= sc->as_maxmem);
if (size > (sc->as_maxmem - sc->as_allocated))
return NULL;
if (size > ((isc->gtt_size/4) << AGP_PAGE_SHIFT))
return NULL;
switch (type) {
case AGP_I810_MEMTYPE_MAIN:
break;
case AGP_I810_MEMTYPE_DCACHE:
if (isc->chiptype != CHIP_I810)
return NULL;
if (size != isc->dcache_size)
return NULL;
break;
case AGP_I810_MEMTYPE_HWCURSOR:
if ((size != AGP_PAGE_SIZE) &&
(size != AGP_PAGE_SIZE*4))
return NULL;
break;
default:
return NULL;
}
mem = malloc(sizeof(*mem), M_AGP, M_WAITOK|M_ZERO);
if (mem == NULL)
goto fail0;
mem->am_id = sc->as_nextid++;
mem->am_size = size;
mem->am_type = type;
switch (type) {
case AGP_I810_MEMTYPE_MAIN:
error = bus_dmamap_create(sc->as_dmat, size,
(size >> AGP_PAGE_SHIFT) + 1, size, 0, BUS_DMA_WAITOK,
&mem->am_dmamap);
if (error)
goto fail1;
break;
case AGP_I810_MEMTYPE_DCACHE:
break;
case AGP_I810_MEMTYPE_HWCURSOR:
mem->am_dmaseg = malloc(sizeof(*mem->am_dmaseg), M_AGP,
M_WAITOK);
error = agp_alloc_dmamem(sc->as_dmat, size, 0, &mem->am_dmamap,
&mem->am_virtual, &mem->am_physical, mem->am_dmaseg, 1,
&mem->am_nseg);
if (error) {
free(mem->am_dmaseg, M_AGP);
goto fail1;
}
(void)memset(mem->am_virtual, 0, size);
break;
default:
panic("invalid agp memory type: %d", type);
}
TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
sc->as_allocated += size;
return mem;
fail1: free(mem, M_AGP);
fail0: return NULL;
}
static int
agp_i810_free_memory(struct agp_softc *sc, struct agp_memory *mem)
{
if (mem->am_is_bound)
return EBUSY;
switch (mem->am_type) {
case AGP_I810_MEMTYPE_MAIN:
bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap);
break;
case AGP_I810_MEMTYPE_DCACHE:
break;
case AGP_I810_MEMTYPE_HWCURSOR:
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);
break;
default:
panic("invalid agp i810 memory type: %d", mem->am_type);
}
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;
uint32_t pgtblctl;
int error;
if (mem->am_is_bound)
return EINVAL;
/*
* 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.
*/
pgtblctl = bus_space_read_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL);
if (pgtblctl != isc->pgtblctl) {
printf("agp_i810_bind_memory: PGTBL_CTL is 0x%"PRIx32
" - fixing\n", pgtblctl);
bus_space_write_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL,
isc->pgtblctl);
}
switch (mem->am_type) {
case AGP_I810_MEMTYPE_MAIN:
return agp_generic_bind_memory_bounded(sc, mem, offset,
0, (isc->gtt_size/4) << AGP_PAGE_SHIFT);
case AGP_I810_MEMTYPE_DCACHE:
error = agp_i810_bind_memory_dcache(sc, mem, offset);
break;
case AGP_I810_MEMTYPE_HWCURSOR:
error = agp_i810_bind_memory_hwcursor(sc, mem, offset);
break;
default:
panic("invalid agp i810 memory type: %d", mem->am_type);
}
if (error)
return error;
/* Success! */
mem->am_is_bound = 1;
return 0;
}
static int
agp_i810_bind_memory_dcache(struct agp_softc *sc, struct agp_memory *mem,
off_t offset)
{
struct agp_i810_softc *const isc __diagused = sc->as_chipc;
uint32_t i, j;
int error;
KASSERT(isc->chiptype == CHIP_I810);
KASSERT((mem->am_size & (AGP_PAGE_SIZE - 1)) == 0);
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
error = agp_i810_write_gtt_entry(isc, offset + i,
i, AGP_I810_GTT_VALID | AGP_I810_GTT_I810_DCACHE);
if (error)
goto fail0;
}
/* Success! */
mem->am_offset = offset;
return 0;
fail0: for (j = 0; j < i; j += AGP_PAGE_SIZE)
(void)agp_i810_unbind_page(sc, offset + j);
return error;
}
static int
agp_i810_bind_memory_hwcursor(struct agp_softc *sc, struct agp_memory *mem,
off_t offset)
{
const bus_addr_t pa = mem->am_physical;
uint32_t i, j;
int error;
KASSERT((mem->am_size & (AGP_PAGE_SIZE - 1)) == 0);
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
error = agp_i810_bind_page(sc, offset + i, pa + i);
if (error)
goto fail0;
}
/* Success! */
mem->am_offset = offset;
return 0;
fail0: for (j = 0; j < i; j += AGP_PAGE_SIZE)
(void)agp_i810_unbind_page(sc, offset + j);
return error;
}
static int
agp_i810_unbind_memory(struct agp_softc *sc, struct agp_memory *mem)
{
struct agp_i810_softc *isc __diagused = sc->as_chipc;
u_int32_t i;
if (!mem->am_is_bound)
return EINVAL;
switch (mem->am_type) {
case AGP_I810_MEMTYPE_MAIN:
return agp_generic_unbind_memory(sc, mem);
case AGP_I810_MEMTYPE_DCACHE:
KASSERT(isc->chiptype == CHIP_I810);
/* FALLTHROUGH */
case AGP_I810_MEMTYPE_HWCURSOR:
for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
(void)agp_i810_unbind_page(sc, mem->am_offset + i);
mem->am_offset = 0;
break;
default:
panic("invalid agp i810 memory type: %d", mem->am_type);
}
mem->am_is_bound = 0;
return 0;
}
void
agp_i810_reset(struct agp_i810_softc *isc)
{
/* Restore the page table control register. */
bus_space_write_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL,
isc->pgtblctl);
agp_flush_cache();
}
static bool
agp_i810_resume(device_t dv, const pmf_qual_t *qual)
{
struct agp_softc *sc = device_private(dv);
struct agp_i810_softc *isc = sc->as_chipc;
agp_i810_reset(isc);
return true;
}