/* $OpenBSD: agp_ali.c,v 1.5 2007/11/26 15:35:15 deraadt Exp $ */ /* $NetBSD: agp_ali.c,v 1.2 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_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct agp_ali_softc { u_int32_t initial_aperture; /* aperture size at startup */ struct agp_gatt *gatt; }; u_int32_t agp_ali_get_aperture(struct agp_softc *); int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); int agp_ali_unbind_page(struct agp_softc *, off_t); void agp_ali_flush_tlb(struct agp_softc *); struct agp_methods agp_ali_methods = { agp_ali_get_aperture, agp_ali_set_aperture, agp_ali_bind_page, agp_ali_unbind_page, agp_ali_flush_tlb, agp_generic_enable, agp_generic_alloc_memory, agp_generic_free_memory, agp_generic_bind_memory, agp_generic_unbind_memory, }; int agp_ali_attach(struct agp_softc *sc, struct pci_attach_args *pa) { struct agp_ali_softc *asc; struct agp_gatt *gatt; pcireg_t reg; asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); if (asc == NULL) { printf("failed to allocate softc\n"); return (ENOMEM); } sc->sc_chipc = asc; sc->sc_methods = &agp_ali_methods; if (agp_map_aperture(pa, sc, AGP_APBASE, PCI_MAPREG_TYPE_MEM) != 0) { printf("failed to map aperture\n"); free(asc, M_AGP); return (ENXIO); } asc->initial_aperture = agp_ali_get_aperture(sc); for (;;) { gatt = agp_alloc_gatt(sc); if (gatt != NULL) 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); } } asc->gatt = gatt; /* Install the gatt. */ reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE); reg = (reg & 0xff) | gatt->ag_physical; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg); /* Enable the TLB. */ reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL); reg = (reg & ~0xff) | 0x10; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); return (0); } #if 0 int agp_ali_detach(struct agp_softc *sc) { int error; pcireg_t reg; struct agp_ali_softc *asc = sc->sc_chipc; error = agp_generic_detach(sc); if (error) return (error); /* Disable the TLB.. */ reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL); reg &= ~0xff; reg |= 0x90; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); /* Put the aperture back the way it started. */ AGP_SET_APERTURE(sc, asc->initial_aperture); reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE); reg &= 0xff; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg); agp_free_gatt(sc, asc->gatt); return (0); } #endif #define M 1024*1024 static const u_int32_t agp_ali_table[] = { 0, /* 0 - invalid */ 1, /* 1 - invalid */ 2, /* 2 - invalid */ 4*M, /* 3 - invalid */ 8*M, /* 4 - invalid */ 0, /* 5 - invalid */ 16*M, /* 6 - invalid */ 32*M, /* 7 - invalid */ 64*M, /* 8 - invalid */ 128*M, /* 9 - invalid */ 256*M, /* 10 - invalid */ }; #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) u_int32_t agp_ali_get_aperture(struct agp_softc *sc) { int i; /* * The aperture size is derived from the low bits of attbase. * I'm not sure this is correct.. */ i = (int)pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE) & 0xff; if (i >= agp_ali_table_size) return (0); return (agp_ali_table[i]); } int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) { int i; pcireg_t reg; for (i = 0; i < agp_ali_table_size; i++) if (agp_ali_table[i] == aperture) break; if (i == agp_ali_table_size) return (EINVAL); reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE); reg &= ~0xff; reg |= i; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg); return (0); } int agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) { struct agp_ali_softc *asc = sc->sc_chipc; if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) return (EINVAL); asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; return (0); } int agp_ali_unbind_page(struct agp_softc *sc, off_t offset) { struct agp_ali_softc *asc = sc->sc_chipc; if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) return (EINVAL); asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; return (0); } void agp_ali_flush_tlb(struct agp_softc *sc) { pcireg_t reg; reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL); reg &= ~0xff; reg |= 0x90; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); reg &= ~0xff; reg |= 0x10; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg); }