/* $OpenBSD: agp_intel.c,v 1.5 2007/10/06 23:50:54 krw Exp $ */ /* $NetBSD: agp_intel.c,v 1.3 2001/09/15 00:25:00 thorpej Exp $ */ /*- * Copyright (c) 2000 Doug Rabson * 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_intel.c,v 1.4 2001/07/05 21:28:47 jhb Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct agp_intel_softc { u_int32_t initial_aperture; /* aperture size at startup */ struct agp_gatt *gatt; }; static u_int32_t agp_intel_get_aperture(struct vga_pci_softc *); static int agp_intel_set_aperture(struct vga_pci_softc *, u_int32_t); static int agp_intel_bind_page(struct vga_pci_softc *, off_t, bus_addr_t); static int agp_intel_unbind_page(struct vga_pci_softc *, off_t); static void agp_intel_flush_tlb(struct vga_pci_softc *); struct agp_methods agp_intel_methods = { agp_intel_get_aperture, agp_intel_set_aperture, agp_intel_bind_page, agp_intel_unbind_page, agp_intel_flush_tlb, agp_generic_enable, agp_generic_alloc_memory, agp_generic_free_memory, agp_generic_bind_memory, agp_generic_unbind_memory, }; int agp_intel_attach(struct vga_pci_softc *sc, struct pci_attach_args *pa, struct pci_attach_args *pchb_pa) { struct agp_intel_softc *isc; struct agp_gatt *gatt; pcireg_t reg; isc = malloc(sizeof *isc, M_DEVBUF, M_NOWAIT | M_ZERO); if (isc == NULL) { printf(": can't allocate chipset-specific softc\n"); return (ENOMEM); } sc->sc_methods = &agp_intel_methods; sc->sc_chipc = isc; if (agp_map_aperture(sc, AGP_APBASE, PCI_MAPREG_TYPE_MEM) != 0) { printf(": can't map aperture\n"); free(isc, M_DEVBUF); sc->sc_chipc = NULL; return (ENXIO); } isc->initial_aperture = AGP_GET_APERTURE(sc); for (;;) { gatt = agp_alloc_gatt(sc); if (gatt) break; /* * Probably contigmalloc failure. Try reducing the * aperture so that the gatt size reduces. */ if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { agp_generic_detach(sc); printf(": failed to set aperture\n"); return (ENOMEM); } } isc->gatt = gatt; /* Install the gatt. */ pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_ATTBASE, gatt->ag_physical); /* Enable things, clear errors etc. */ /* XXXfvdl get rid of the magic constants */ pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_AGPCTRL, 0x2280); reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG); reg &= ~(1 << 10); reg |= (1 << 9); pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG, reg); reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_STS); reg &= ~0x00ff0000; reg |= (7 << 16); pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_STS, reg); return (0); } #if 0 static int agp_intel_detach(struct vga_pci_softc *sc) { int error; pcireg_t reg; struct agp_intel_softc *isc = sc->sc_chipc; error = agp_generic_detach(sc); if (error) return (error); reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG); reg &= ~(1 << 9); printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg); pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG, reg); pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_ATTBASE, 0); AGP_SET_APERTURE(sc, isc->initial_aperture); agp_free_gatt(sc, isc->gatt); return (0); } #endif static u_int32_t agp_intel_get_aperture(struct vga_pci_softc *sc) { u_int32_t apsize; apsize = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_APSIZE) & 0x1f; /* * The size is determined by the number of low bits of * register APBASE which are forced to zero. The low 22 bits * are always forced to zero and each zero bit in the apsize * field just read forces the corresponding bit in the 27:22 * to be zero. We calculate the aperture size accordingly. */ return ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1); } static int agp_intel_set_aperture(struct vga_pci_softc *sc, u_int32_t aperture) { u_int32_t apsize; pcireg_t reg; /* * Reverse the magic from get_aperture. */ apsize = ((aperture - 1) >> 22) ^ 0x1f; /* * Double check for sanity. */ if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture) return (EINVAL); reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_APSIZE); reg = (reg & 0xffffff00) | apsize; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_APSIZE, reg); return (0); } static int agp_intel_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t physical) { struct agp_intel_softc *isc = sc->sc_chipc; if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) return (EINVAL); isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; return (0); } static int agp_intel_unbind_page(struct vga_pci_softc *sc, off_t offset) { struct agp_intel_softc *isc = sc->sc_chipc; if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) return (EINVAL); isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; return (0); } static void agp_intel_flush_tlb(struct vga_pci_softc *sc) { pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_AGPCTRL, 0x2200); pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_AGPCTRL, 0x2280); }