/* $OpenBSD: agp_apple.c,v 1.9 2024/05/24 06:02:53 jsg Exp $ */ /* * Copyright (c) 2012 Martin Pieuchot * * 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 #include #include #include #include #include #include #include #include #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 *); int agp_apple_enable(void *, uint32_t); 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, agp_apple_enable, }; 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: /* XXX until KMS works with these bridges */ return (0); 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); flushdcache((void *)pa, PAGE_SIZE); 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); } } int agp_apple_enable(void *v, uint32_t mode) { struct agp_apple_softc *asc = v; if ((asc->asc_flags & AGP_APPLE_ISU3) == 0) { /* * GART invalidate/SBA reset? Linux and Darwin do something * similar and it prevents GPU lockups with KMS. */ 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); } return (agp_generic_enable(asc->agpdev, mode)); }