/* $NetBSD: uba_dma.c,v 1.11 2010/12/14 23:38:30 matt 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. * * 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, 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. */ #include __KERNEL_RCSID(0, "$NetBSD: uba_dma.c,v 1.11 2010/12/14 23:38:30 matt Exp $"); #define _VAX_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include #include #include #include int uba_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *); void uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t); int uba_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int uba_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void uba_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); void uba_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); void uba_dma_init(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, if not mapped in already. */ if (sc->uv_uba) { pte = sc->uv_uba->uba_map; } else { pte = (struct pte *)vax_map_physmem(sc->uv_addr, vax_btoc(vax_btoc(sc->uv_size) * sizeof(struct pte))); 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(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(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(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( 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(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(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(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(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. */ }