/* $OpenBSD: agp_amd.c,v 1.4 2007/10/06 23:50:54 krw Exp $ */ /* $NetBSD: agp_amd.c,v 1.6 2001/10/06 02:48:50 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_amd.c,v 1.6 2001/07/05 21:28:46 jhb Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define READ2(off) bus_space_read_2(asc->iot, asc->ioh, off) #define READ4(off) bus_space_read_4(asc->iot, asc->ioh, off) #define WRITE2(off,v) bus_space_write_2(asc->iot, asc->ioh, off, v) #define WRITE4(off,v) bus_space_write_4(asc->iot, asc->ioh, off, v) struct agp_amd_gatt { bus_dmamap_t ag_dmamap; bus_dma_segment_t ag_dmaseg; int ag_nseg; u_int32_t ag_entries; u_int32_t *ag_vdir; /* virtual address of page dir */ bus_addr_t ag_pdir; /* bus address of page dir */ u_int32_t *ag_virtual; /* virtual address of gatt */ bus_addr_t ag_physical; /* bus address of gatt */ size_t ag_size; }; struct agp_amd_softc { u_int32_t initial_aperture; /* aperture size at startup */ struct agp_amd_gatt *gatt; bus_space_handle_t ioh; bus_space_tag_t iot; }; static u_int32_t agp_amd_get_aperture(struct vga_pci_softc *); static int agp_amd_set_aperture(struct vga_pci_softc *, u_int32_t); static int agp_amd_bind_page(struct vga_pci_softc *, off_t, bus_addr_t); static int agp_amd_unbind_page(struct vga_pci_softc *, off_t); static void agp_amd_flush_tlb(struct vga_pci_softc *); struct agp_methods agp_amd_methods = { agp_amd_get_aperture, agp_amd_set_aperture, agp_amd_bind_page, agp_amd_unbind_page, agp_amd_flush_tlb, agp_generic_enable, agp_generic_alloc_memory, agp_generic_free_memory, agp_generic_bind_memory, agp_generic_unbind_memory, }; static struct agp_amd_gatt * agp_amd_alloc_gatt(struct vga_pci_softc *sc) { u_int32_t apsize = AGP_GET_APERTURE(sc); u_int32_t entries = apsize >> AGP_PAGE_SHIFT; struct agp_amd_gatt *gatt; int i, npages; caddr_t vdir; gatt = malloc(sizeof(struct agp_amd_gatt), M_DEVBUF, M_NOWAIT); if (!gatt) return (0); if (agp_alloc_dmamem(sc->sc_dmat, AGP_PAGE_SIZE + entries * sizeof(u_int32_t), 0, &gatt->ag_dmamap, &vdir, &gatt->ag_pdir, &gatt->ag_dmaseg, 1, &gatt->ag_nseg) != 0) { printf("failed to allocate GATT\n"); free(gatt, M_DEVBUF); return (NULL); } gatt->ag_vdir = (u_int32_t *)vdir; gatt->ag_entries = entries; gatt->ag_virtual = (u_int32_t *)(vdir + AGP_PAGE_SIZE); gatt->ag_physical = gatt->ag_pdir + AGP_PAGE_SIZE; gatt->ag_size = AGP_PAGE_SIZE + entries * sizeof(u_int32_t); memset(gatt->ag_vdir, 0, AGP_PAGE_SIZE); memset(gatt->ag_virtual, 0, entries * sizeof(u_int32_t)); /* * Map the pages of the GATT into the page directory. */ npages = ((entries * sizeof(u_int32_t) + AGP_PAGE_SIZE - 1) >> AGP_PAGE_SHIFT); for (i = 0; i < npages; i++) gatt->ag_vdir[i] = (gatt->ag_physical + i * AGP_PAGE_SIZE) | 1; /* * Make sure the chipset can see everything. */ agp_flush_cache(); return (gatt); } #if 0 static void agp_amd_free_gatt(struct vga_pci_softc *sc, struct agp_amd_gatt *gatt) { agp_free_dmamem(sc->sc_dmat, gatt->ag_size, gatt->ag_dmamap, (caddr_t)gatt->ag_virtual, &gatt->ag_dmaseg, gatt->ag_nseg); free(gatt, M_DEVBUF); } #endif int agp_amd_attach(struct vga_pci_softc *sc, struct pci_attach_args *pa, struct pci_attach_args *pchb_pa) { struct agp_amd_softc *asc; struct agp_amd_gatt *gatt; pcireg_t reg; int error; asc = malloc(sizeof *asc, M_DEVBUF, M_NOWAIT | M_ZERO); if (asc == NULL) { printf(": can't allocate softc\n"); /* agp_generic_detach(sc) */ return (ENOMEM); } error = pci_mapreg_map(pchb_pa, AGP_AMD751_REGISTERS, PCI_MAPREG_TYPE_MEM,0, &asc->iot, &asc->ioh, NULL, NULL, 0); if (error != 0) { printf(": can't map AGP registers\n"); agp_generic_detach(sc); return (error); } if (agp_map_aperture(sc, AGP_APBASE, PCI_MAPREG_TYPE_MEM) != 0) { printf(": can't map aperture\n"); agp_generic_detach(sc); free(asc, M_DEVBUF); return (ENXIO); } sc->sc_methods = &agp_amd_methods; sc->sc_chipc = asc; asc->initial_aperture = AGP_GET_APERTURE(sc); for (;;) { gatt = agp_amd_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)) { printf(": can't set aperture\n"); return (ENOMEM); } } asc->gatt = gatt; /* Install the gatt. */ WRITE4(AGP_AMD751_ATTBASE, gatt->ag_physical); /* Enable synchronisation between host and agp. */ reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_AMD751_MODECTRL); reg &= ~0x00ff00ff; reg |= (AGP_AMD751_MODECTRL_SYNEN) | (AGP_AMD751_MODECTRL2_GPDCE << 16); pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_AMD751_MODECTRL, reg); /* Enable the TLB and flush */ WRITE2(AGP_AMD751_STATUS, READ2(AGP_AMD751_STATUS) | AGP_AMD751_STATUS_GCE); AGP_FLUSH_TLB(sc); return (0); } #if 0 static int agp_amd_detach(struct vga_pci_softc *sc) { pcireg_t reg; struct agp_amd_softc *asc = sc->sc_chipc; /* Disable the TLB.. */ WRITE2(AGP_AMD751_STATUS, READ2(AGP_AMD751_STATUS) & ~AGP_AMD751_STATUS_GCE); /* Disable host-agp sync */ reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_AMD751_MODECTRL); reg &= 0xffffff00; pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_AMD751_MODECTRL, reg); /* Clear the GATT base */ WRITE4(AGP_AMD751_ATTBASE, 0); /* Put the aperture back the way it started. */ AGP_SET_APERTURE(sc, asc->initial_aperture); agp_amd_free_gatt(sc, asc->gatt); /* XXXfvdl no pci_mapreg_unmap */ return (0); } #endif static u_int32_t agp_amd_get_aperture(struct vga_pci_softc *sc) { int vas; vas = (pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_AMD751_APCTRL) & 0x06); vas >>= 1; /* * The aperture size is equal to 32M< 2U*1024*1024*1024) return (EINVAL); vas = ffs(aperture / 32*1024*1024) - 1; reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_AMD751_APCTRL); reg = (reg & ~0x06) | (vas << 1); pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_AMD751_APCTRL, reg); return (0); } static int agp_amd_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t physical) { struct agp_amd_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 | 1; return (0); } static int agp_amd_unbind_page(struct vga_pci_softc *sc, off_t offset) { struct agp_amd_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); } static void agp_amd_flush_tlb(struct vga_pci_softc *sc) { struct agp_amd_softc *asc = sc->sc_chipc; /* Set the cache invalidate bit and wait for the chipset to clear */ WRITE4(AGP_AMD751_TLBCTRL, 1); do { DELAY(1); } while (READ4(AGP_AMD751_TLBCTRL)); }