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/* $OpenBSD: agp_apple.c,v 1.2 2012/12/22 19:17:36 mpi Exp $ */
/*
* Copyright (c) 2012 Martin Pieuchot <mpi@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/agpio.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 <machine/bus.h>
#define M (1024 * 1024)
struct agp_apple_softc {
struct device dev;
struct agp_softc *agpdev;
struct agp_gatt *gatt;
pci_chipset_tag_t asc_pc;
pcitag_t asc_tag;
bus_addr_t asc_apaddr;
bus_size_t asc_apsize;
int asc_flags;
#define AGP_APPLE_ISU3 (1 << 0)
};
int agp_apple_match(struct device *, void *, void *);
void agp_apple_attach(struct device *, struct device *, void *);
bus_size_t agp_apple_get_aperture(void *);
int agp_apple_set_aperture(void *sc, bus_size_t);
void agp_apple_bind_page(void *, bus_addr_t, paddr_t, int);
void agp_apple_unbind_page(void *, bus_addr_t);
void agp_apple_flush_tlb(void *);
const struct cfattach appleagp_ca = {
sizeof(struct agp_apple_softc), agp_apple_match, agp_apple_attach,
};
struct cfdriver appleagp_cd = {
NULL, "appleagp", DV_DULL
};
const struct agp_methods agp_apple_methods = {
agp_apple_bind_page,
agp_apple_unbind_page,
agp_apple_flush_tlb,
};
int
agp_apple_match(struct device *parent, void *match, void *aux)
{
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
if (agpbus_probe(aa) != 1 || PCI_VENDOR(pa->pa_id) != PCI_VENDOR_APPLE)
return (0);
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_APPLE_UNINORTH_AGP:
case PCI_PRODUCT_APPLE_PANGEA_AGP:
case PCI_PRODUCT_APPLE_UNINORTH2_AGP:
case PCI_PRODUCT_APPLE_UNINORTH_AGP3:
case PCI_PRODUCT_APPLE_INTREPID2_AGP:
case PCI_PRODUCT_APPLE_U3_AGP:
case PCI_PRODUCT_APPLE_U3L_AGP:
case PCI_PRODUCT_APPLE_K2_AGP:
return (1);
}
return (0);
}
void
agp_apple_attach(struct device *parent, struct device *self, void *aux)
{
struct agp_apple_softc *asc = (struct agp_apple_softc *)self;
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
struct agp_gatt *gatt;
asc->asc_tag = pa->pa_tag;
asc->asc_pc = pa->pa_pc;
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_APPLE_U3_AGP:
case PCI_PRODUCT_APPLE_U3L_AGP:
case PCI_PRODUCT_APPLE_K2_AGP:
asc->asc_flags |= AGP_APPLE_ISU3;
break;
default:
break;
}
/*
* XXX It looks like UniNorth GART only accepts an aperture
* base address of 0x00 certainly because it does not perform
* any physical-to-physical address translation.
*/
asc->asc_apaddr = 0x00;
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_APBASE,
asc->asc_apaddr);
/*
* There's no way to read the aperture size but all UniNorth
* chips seem to support an aperture of 256M (and 512M for U3).
*/
asc->asc_apsize = 256 * M;
for (;;) {
gatt = agp_alloc_gatt(pa->pa_dmat, asc->asc_apsize);
if (gatt != NULL)
break;
asc->asc_apsize /= 2;
}
asc->gatt = gatt;
if (agp_apple_set_aperture(asc, asc->asc_apsize)) {
printf("failed to set aperture\n");
return;
}
agp_apple_flush_tlb(asc);
asc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_apple_methods,
asc->asc_apaddr, asc->asc_apsize, &asc->dev);
}
bus_size_t
agp_apple_get_aperture(void *dev)
{
struct agp_apple_softc *asc = dev;
return (asc->asc_apsize);
}
int
agp_apple_set_aperture(void *dev, bus_size_t aperture)
{
struct agp_apple_softc *asc = dev;
if (aperture % (4 * M) || aperture < (4 * M) || aperture > (256 * M))
return (EINVAL);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_ATTBASE,
(asc->gatt->ag_physical & 0xfffff000) | (aperture >> 22));
return (0);
}
#define flushd(p) __asm __volatile("dcbst 0,%0; sync" ::"r"(p) : "memory")
void
agp_apple_bind_page(void *v, bus_addr_t off, paddr_t pa, int flags)
{
struct agp_apple_softc *asc = v;
uint32_t entry;
if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
return;
if (asc->asc_flags & AGP_APPLE_ISU3)
entry = (pa >> PAGE_SHIFT | 0x80000000);
else
entry = htole32(pa | 0x01);
asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = entry;
flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]);
}
void
agp_apple_unbind_page(void *v, bus_size_t off)
{
struct agp_apple_softc *asc = v;
if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
return;
asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = 0;
flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]);
}
#undef flushd
void
agp_apple_flush_tlb(void *v)
{
struct agp_apple_softc *asc = v;
if (asc->asc_flags & AGP_APPLE_ISU3) {
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD |
AGP_APPLE_GART_INVALIDATE);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD);
} else {
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_INVALIDATE);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_2XRESET);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE);
}
}
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