287 lines
6.9 KiB
C
287 lines
6.9 KiB
C
/* $NetBSD: uba_dma.c,v 1.5 2000/06/29 07:14:22 mrg Exp $ */
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/*-
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* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <uvm/uvm_extern.h>
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#define _VAX_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/sgmap.h>
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#include <dev/qbus/ubavar.h>
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#include <arch/vax/uba/uba_common.h>
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int uba_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int,
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bus_size_t, bus_size_t, int, bus_dmamap_t *));
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void uba_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
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int uba_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *,
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bus_size_t, struct proc *, int));
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int uba_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
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struct mbuf *, int));
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int uba_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
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struct uio *, int));
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int uba_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
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bus_dma_segment_t *, int, bus_size_t, int));
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void uba_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
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void uba_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
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bus_size_t, int));
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void
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uba_dma_init(sc)
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struct uba_vsoftc *sc;
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{
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bus_dma_tag_t t;
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struct pte *pte;
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/*
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* Initialize the DMA tag used for sgmap-mapped DMA.
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*/
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t = &sc->uv_dmat;
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t->_cookie = sc;
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t->_wbase = 0;
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t->_wsize = sc->uv_size;
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t->_boundary = 0;
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t->_sgmap = &sc->uv_sgmap;
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t->_dmamap_create = uba_bus_dmamap_create_sgmap;
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t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap;
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t->_dmamap_load = uba_bus_dmamap_load_sgmap;
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t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap;
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t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap;
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t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap;
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t->_dmamap_unload = uba_bus_dmamap_unload_sgmap;
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t->_dmamap_sync = uba_bus_dmamap_sync;
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t->_dmamem_alloc = _bus_dmamem_alloc;
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t->_dmamem_free = _bus_dmamem_free;
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t->_dmamem_map = _bus_dmamem_map;
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t->_dmamem_unmap = _bus_dmamem_unmap;
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t->_dmamem_mmap = _bus_dmamem_mmap;
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/*
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* Map in Unibus map registers, if not mapped in already.
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*/
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if (sc->uv_uba) {
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pte = sc->uv_uba->uba_map;
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} else {
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pte = (struct pte *)vax_map_physmem(sc->uv_addr,
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sc->uv_size/(VAX_NBPG/sizeof(struct pte)));
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if (pte == 0)
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panic("uba_dma_init");
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}
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/*
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* Initialize the SGMAP.
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*/
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vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0);
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}
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/*
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* Create a UBA SGMAP-mapped DMA map.
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*/
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int
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uba_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary,
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flags, dmamp)
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bus_dma_tag_t t;
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bus_size_t size;
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int nsegments;
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bus_size_t maxsegsz;
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bus_size_t boundary;
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int flags;
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bus_dmamap_t *dmamp;
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{
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bus_dmamap_t map;
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int error;
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error = _bus_dmamap_create(t, size, nsegments, maxsegsz,
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boundary, flags, dmamp);
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if (error)
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return (error);
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map = *dmamp;
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if (flags & BUS_DMA_ALLOCNOW) {
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error = vax_sgmap_alloc(map, vax_round_page(size),
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t->_sgmap, flags);
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if (error)
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uba_bus_dmamap_destroy_sgmap(t, map);
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}
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return (error);
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}
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/*
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* Destroy a UBA SGMAP-mapped DMA map.
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*/
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void
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uba_bus_dmamap_destroy_sgmap(t, map)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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{
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if (map->_dm_flags & DMAMAP_HAS_SGMAP)
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vax_sgmap_free(map, t->_sgmap);
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_bus_dmamap_destroy(t, map);
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}
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/*
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* Load a UBA SGMAP-mapped DMA map with a linear buffer.
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*/
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int
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uba_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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void *buf;
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bus_size_t buflen;
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struct proc *p;
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int flags;
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{
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int error;
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error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap);
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/*
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* XXX - Set up BDPs.
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*/
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return (error);
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}
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/*
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* Load a UBA SGMAP-mapped DMA map with an mbuf chain.
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*/
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int
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uba_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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struct mbuf *m;
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int flags;
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{
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int error;
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error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap);
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return (error);
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}
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/*
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* Load a UBA SGMAP-mapped DMA map with a uio.
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*/
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int
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uba_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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struct uio *uio;
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int flags;
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{
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int error;
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error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap);
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return (error);
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}
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/*
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* Load a UBA SGMAP-mapped DMA map with raw memory.
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*/
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int
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uba_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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bus_dma_segment_t *segs;
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int nsegs;
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bus_size_t size;
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int flags;
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{
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int error;
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error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags,
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t->_sgmap);
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return (error);
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}
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/*
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* Unload a UBA DMA map.
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*/
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void
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uba_bus_dmamap_unload_sgmap(t, map)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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{
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/*
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* Invalidate any SGMAP page table entries used by this
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* mapping.
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*/
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vax_sgmap_unload(t, map, t->_sgmap);
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/*
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* Do the generic bits of the unload.
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*/
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_bus_dmamap_unload(t, map);
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}
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/*
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* Sync the bus map. This is only needed if BDP's are used.
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*/
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void
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uba_bus_dmamap_sync(tag, dmam, offset, len, ops)
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bus_dma_tag_t tag;
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bus_dmamap_t dmam;
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bus_addr_t offset;
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bus_size_t len;
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int ops;
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{
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/* Only BDP handling, but not yet. */
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}
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