diff options
Diffstat (limited to 'sys/arch/vax/uba/uba_dma.c')
| -rw-r--r-- | sys/arch/vax/uba/uba_dma.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/sys/arch/vax/uba/uba_dma.c b/sys/arch/vax/uba/uba_dma.c new file mode 100644 index 00000000000..f0344dfff96 --- /dev/null +++ b/sys/arch/vax/uba/uba_dma.c @@ -0,0 +1,282 @@ +/* $OpenBSD: uba_dma.c,v 1.1 2000/04/27 03:14:51 bjc Exp $ */ +/* $NetBSD: uba_dma.c,v 1.2 1999/06/20 00:59:55 ragge Exp $ */ + +/*- + * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, + * NASA Ames Research Center. + * + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPEUBAL, 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. + */ + + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/device.h> +#include <sys/malloc.h> +#include <vm/vm.h> + +#define _VAX_BUS_DMA_PRIVATE +#include <machine/bus.h> +#include <machine/cpu.h> +#include <machine/sgmap.h> + +#include <arch/vax/qbus/ubavar.h> + +#include <arch/vax/uba/uba_common.h> + +int uba_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, + bus_size_t, bus_size_t, int, bus_dmamap_t *)); + +void uba_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); + +int uba_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, + bus_size_t, struct proc *, int)); + +int uba_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, + struct mbuf *, int)); + +int uba_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, + struct uio *, int)); + +int uba_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, + bus_dma_segment_t *, int, bus_size_t, int)); + +void uba_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); + +void uba_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, + bus_size_t, int)); + +void +uba_dma_init(sc) + struct uba_vsoftc *sc; +{ + bus_dma_tag_t t; + struct pte *pte; + + /* + * Initialize the DMA tag used for sgmap-mapped DMA. + */ + t = &sc->uv_dmat; + t->_cookie = sc; + t->_wbase = 0; + t->_wsize = sc->uv_size; + t->_boundary = 0; + t->_sgmap = &sc->uv_sgmap; + t->_dmamap_create = uba_bus_dmamap_create_sgmap; + t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap; + t->_dmamap_load = uba_bus_dmamap_load_sgmap; + t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap; + t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap; + t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap; + t->_dmamap_unload = uba_bus_dmamap_unload_sgmap; + t->_dmamap_sync = uba_bus_dmamap_sync; + + t->_dmamem_alloc = _bus_dmamem_alloc; + t->_dmamem_free = _bus_dmamem_free; + t->_dmamem_map = _bus_dmamem_map; + t->_dmamem_unmap = _bus_dmamem_unmap; + t->_dmamem_mmap = _bus_dmamem_mmap; + + /* + * Map in Unibus map registers. + */ + pte = (struct pte *)vax_map_physmem(sc->uv_addr, sc->uv_size/VAX_NBPG); + if (pte == 0) + panic("uba_dma_init"); + /* + * Initialize the SGMAP. + */ + vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0); + +} + +/* + * Create a UBA SGMAP-mapped DMA map. + */ +int +uba_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, + flags, dmamp) + bus_dma_tag_t t; + bus_size_t size; + int nsegments; + bus_size_t maxsegsz; + bus_size_t boundary; + int flags; + bus_dmamap_t *dmamp; +{ + bus_dmamap_t map; + int error; + + error = _bus_dmamap_create(t, size, nsegments, maxsegsz, + boundary, flags, dmamp); + if (error) + return (error); + + map = *dmamp; + + if (flags & BUS_DMA_ALLOCNOW) { + error = vax_sgmap_alloc(map, vax_round_page(size), + t->_sgmap, flags); + if (error) + uba_bus_dmamap_destroy_sgmap(t, map); + } + + return (error); +} + +/* + * Destroy a UBA SGMAP-mapped DMA map. + */ +void +uba_bus_dmamap_destroy_sgmap(t, map) + bus_dma_tag_t t; + bus_dmamap_t map; +{ + + if (map->_dm_flags & DMAMAP_HAS_SGMAP) + vax_sgmap_free(map, t->_sgmap); + + _bus_dmamap_destroy(t, map); +} + +/* + * Load a UBA SGMAP-mapped DMA map with a linear buffer. + */ +int +uba_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) + bus_dma_tag_t t; + bus_dmamap_t map; + void *buf; + bus_size_t buflen; + struct proc *p; + int flags; +{ + int error; + + error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); + /* + * XXX - Set up BDPs. + */ + + return (error); +} + +/* + * Load a UBA SGMAP-mapped DMA map with an mbuf chain. + */ +int +uba_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) + bus_dma_tag_t t; + bus_dmamap_t map; + struct mbuf *m; + int flags; +{ + int error; + + error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); + + return (error); +} + +/* + * Load a UBA SGMAP-mapped DMA map with a uio. + */ +int +uba_bus_dmamap_load_uio_sgmap(t, map, uio, flags) + bus_dma_tag_t t; + bus_dmamap_t map; + struct uio *uio; + int flags; +{ + int error; + + error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); + + return (error); +} + +/* + * Load a UBA SGMAP-mapped DMA map with raw memory. + */ +int +uba_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) + bus_dma_tag_t t; + bus_dmamap_t map; + bus_dma_segment_t *segs; + int nsegs; + bus_size_t size; + int flags; +{ + int error; + + error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, + t->_sgmap); + + return (error); +} + +/* + * Unload a UBA DMA map. + */ +void +uba_bus_dmamap_unload_sgmap(t, map) + bus_dma_tag_t t; + bus_dmamap_t map; +{ + + /* + * Invalidate any SGMAP page table entries used by this + * mapping. + */ + vax_sgmap_unload(t, map, t->_sgmap); + + /* + * Do the generic bits of the unload. + */ + _bus_dmamap_unload(t, map); +} + +/* + * Sync the bus map. This is only needed if BDP's are used. + */ +void +uba_bus_dmamap_sync(tag, dmam, offset, len, ops) + bus_dma_tag_t tag; + bus_dmamap_t dmam; + bus_addr_t offset; + bus_size_t len; + int ops; +{ + /* Only BDP handling, but not yet. */ +} |