248 lines
6.4 KiB
C
248 lines
6.4 KiB
C
/* $OpenBSD: agp_apple.c,v 1.8 2016/05/07 22:46:54 kettenis Exp $ */
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/*
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* Copyright (c) 2012 Martin Pieuchot <mpi@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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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/device.h>
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#include <sys/rwlock.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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#include <dev/pci/agpvar.h>
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#include <dev/pci/agpreg.h>
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#include <machine/bus.h>
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#define M (1024 * 1024)
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struct agp_apple_softc {
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struct device dev;
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struct agp_softc *agpdev;
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struct agp_gatt *gatt;
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pci_chipset_tag_t asc_pc;
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pcitag_t asc_tag;
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bus_addr_t asc_apaddr;
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bus_size_t asc_apsize;
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int asc_flags;
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#define AGP_APPLE_ISU3 (1 << 0)
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};
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int agp_apple_match(struct device *, void *, void *);
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void agp_apple_attach(struct device *, struct device *, void *);
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bus_size_t agp_apple_get_aperture(void *);
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int agp_apple_set_aperture(void *sc, bus_size_t);
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void agp_apple_bind_page(void *, bus_addr_t, paddr_t, int);
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void agp_apple_unbind_page(void *, bus_addr_t);
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void agp_apple_flush_tlb(void *);
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int agp_apple_enable(void *, uint32_t);
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const struct cfattach appleagp_ca = {
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sizeof(struct agp_apple_softc), agp_apple_match, agp_apple_attach,
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};
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struct cfdriver appleagp_cd = {
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NULL, "appleagp", DV_DULL
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};
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const struct agp_methods agp_apple_methods = {
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agp_apple_bind_page,
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agp_apple_unbind_page,
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agp_apple_flush_tlb,
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agp_apple_enable,
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};
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int
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agp_apple_match(struct device *parent, void *match, void *aux)
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{
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struct agp_attach_args *aa = aux;
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struct pci_attach_args *pa = aa->aa_pa;
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if (agpbus_probe(aa) != 1 || PCI_VENDOR(pa->pa_id) != PCI_VENDOR_APPLE)
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return (0);
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switch (PCI_PRODUCT(pa->pa_id)) {
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case PCI_PRODUCT_APPLE_UNINORTH_AGP:
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case PCI_PRODUCT_APPLE_PANGEA_AGP:
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case PCI_PRODUCT_APPLE_UNINORTH2_AGP:
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case PCI_PRODUCT_APPLE_UNINORTH_AGP3:
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case PCI_PRODUCT_APPLE_INTREPID2_AGP:
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/* XXX until KMS works with these bridges */
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return (0);
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case PCI_PRODUCT_APPLE_U3_AGP:
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case PCI_PRODUCT_APPLE_U3L_AGP:
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case PCI_PRODUCT_APPLE_K2_AGP:
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return (1);
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}
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return (0);
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}
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void
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agp_apple_attach(struct device *parent, struct device *self, void *aux)
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{
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struct agp_apple_softc *asc = (struct agp_apple_softc *)self;
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struct agp_attach_args *aa = aux;
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struct pci_attach_args *pa = aa->aa_pa;
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struct agp_gatt *gatt;
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asc->asc_tag = pa->pa_tag;
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asc->asc_pc = pa->pa_pc;
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switch (PCI_PRODUCT(pa->pa_id)) {
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case PCI_PRODUCT_APPLE_U3_AGP:
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case PCI_PRODUCT_APPLE_U3L_AGP:
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case PCI_PRODUCT_APPLE_K2_AGP:
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asc->asc_flags |= AGP_APPLE_ISU3;
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break;
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default:
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break;
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}
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/*
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* XXX It looks like UniNorth GART only accepts an aperture
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* base address of 0x00 certainly because it does not perform
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* any physical-to-physical address translation.
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*/
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asc->asc_apaddr = 0x00;
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pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_APBASE,
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asc->asc_apaddr);
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/*
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* There's no way to read the aperture size but all UniNorth
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* chips seem to support an aperture of 256M (and 512M for U3).
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*/
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asc->asc_apsize = 256 * M;
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for (;;) {
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gatt = agp_alloc_gatt(pa->pa_dmat, asc->asc_apsize);
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if (gatt != NULL)
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break;
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asc->asc_apsize /= 2;
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}
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asc->gatt = gatt;
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if (agp_apple_set_aperture(asc, asc->asc_apsize)) {
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printf("failed to set aperture\n");
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return;
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}
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agp_apple_flush_tlb(asc);
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asc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_apple_methods,
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asc->asc_apaddr, asc->asc_apsize, &asc->dev);
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}
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bus_size_t
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agp_apple_get_aperture(void *dev)
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{
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struct agp_apple_softc *asc = dev;
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return (asc->asc_apsize);
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}
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int
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agp_apple_set_aperture(void *dev, bus_size_t aperture)
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{
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struct agp_apple_softc *asc = dev;
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if (aperture % (4 * M) || aperture < (4 * M) || aperture > (256 * M))
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return (EINVAL);
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pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_ATTBASE,
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(asc->gatt->ag_physical & 0xfffff000) | (aperture >> 22));
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return (0);
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}
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#define flushd(p) __asm volatile("dcbst 0,%0; sync" ::"r"(p) : "memory")
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void
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agp_apple_bind_page(void *v, bus_addr_t off, paddr_t pa, int flags)
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{
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struct agp_apple_softc *asc = v;
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uint32_t entry;
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if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
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return;
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if (asc->asc_flags & AGP_APPLE_ISU3)
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entry = (pa >> PAGE_SHIFT | 0x80000000);
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else
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entry = htole32(pa | 0x01);
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flushdcache((void *)pa, PAGE_SIZE);
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asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = entry;
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flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]);
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}
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void
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agp_apple_unbind_page(void *v, bus_size_t off)
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{
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struct agp_apple_softc *asc = v;
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if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
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return;
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asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = 0;
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flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]);
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}
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#undef flushd
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void
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agp_apple_flush_tlb(void *v)
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{
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struct agp_apple_softc *asc = v;
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if (asc->asc_flags & AGP_APPLE_ISU3) {
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pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
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AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD |
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AGP_APPLE_GART_INVALIDATE);
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pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
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AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD);
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} else {
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pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
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AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_INVALIDATE);
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pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
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AGP_APPLE_GART_ENABLE);
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}
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}
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int
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agp_apple_enable(void *v, uint32_t mode)
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{
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struct agp_apple_softc *asc = v;
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if ((asc->asc_flags & AGP_APPLE_ISU3) == 0) {
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/*
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* GART invalidate/SBA reset? Linux and Darwin do something
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* similar and it prevents GPU lockups with KMS.
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*/
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pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
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AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_2XRESET);
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pci_conf_write(asc->asc_pc, asc->asc_tag,
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AGP_APPLE_GARTCTRL, AGP_APPLE_GART_ENABLE);
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}
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return (agp_generic_enable(asc->agpdev, mode));
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}
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