/* $OpenBSD: tc_dma_3000_500.c,v 1.1 2002/05/02 22:56:06 miod Exp $ */ /* $NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 thorpej 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, 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. */ #define _ALPHA_BUS_DMA_PRIVATE #include <sys/param.h> #include <sys/systm.h> #include <sys/device.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <uvm/uvm_extern.h> #include <machine/bus.h> #include <dev/tc/tcvar.h> #include <alpha/tc/tc_sgmap.h> #include <alpha/tc/tc_dma_3000_500.h> struct alpha_bus_dma_tag tc_dmat_sgmap = { NULL, /* _cookie */ 0, /* _wbase */ 0, /* _wsize */ NULL, /* _next_window */ 0, /* _boundary */ NULL, /* _sgmap */ NULL, /* _get_tag */ tc_bus_dmamap_create_sgmap, tc_bus_dmamap_destroy_sgmap, tc_bus_dmamap_load_sgmap, tc_bus_dmamap_load_mbuf_sgmap, tc_bus_dmamap_load_uio_sgmap, tc_bus_dmamap_load_raw_sgmap, tc_bus_dmamap_unload_sgmap, _bus_dmamap_sync, _bus_dmamem_alloc, _bus_dmamem_free, _bus_dmamem_map, _bus_dmamem_unmap, _bus_dmamem_mmap, }; struct tc_dma_slot_info { struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ }; struct tc_dma_slot_info *tc_dma_slot_info; void tc_dma_init_3000_500(nslots) int nslots; { extern struct alpha_bus_dma_tag tc_dmat_direct; size_t sisize; int i; /* Allocate per-slot DMA info. */ sisize = nslots * sizeof(struct tc_dma_slot_info); tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); if (tc_dma_slot_info == NULL) panic("tc_dma_init: can't allocate per-slot DMA info"); memset(tc_dma_slot_info, 0, sisize); /* Default all slots to direct-mapped. */ for (i = 0; i < nslots; i++) memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct, sizeof(tc_dma_slot_info[i].tdsi_dmat)); } /* * Return the DMA tag for the given slot. */ bus_dma_tag_t tc_dma_get_tag_3000_500(slot) int slot; { return (&tc_dma_slot_info[slot].tdsi_dmat); } /* * Create a TurboChannel SGMAP-mapped DMA map. */ int tc_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; /* XXX BUS_DMA_ALLOCNOW */ return (error); } /* * Destroy a TurboChannel SGMAP-mapped DMA map. */ void tc_bus_dmamap_destroy_sgmap(t, map) bus_dma_tag_t t; bus_dmamap_t map; { KASSERT(map->dm_mapsize == 0); _bus_dmamap_destroy(t, map); } /* * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. */ int tc_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; { struct tc_dma_slot_info *tdsi = t->_cookie; return (tc_sgmap_load(t, map, buf, buflen, p, flags, &tdsi->tdsi_sgmap)); } /* * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. */ int tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) bus_dma_tag_t t; bus_dmamap_t map; struct mbuf *m; int flags; { struct tc_dma_slot_info *tdsi = t->_cookie; return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); } /* * Load a TurboChannel SGMAP-mapped DMA map with a uio. */ int tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) bus_dma_tag_t t; bus_dmamap_t map; struct uio *uio; int flags; { struct tc_dma_slot_info *tdsi = t->_cookie; return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); } /* * Load a TurboChannel SGMAP-mapped DMA map with raw memory. */ int tc_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; { struct tc_dma_slot_info *tdsi = t->_cookie; return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, &tdsi->tdsi_sgmap)); } /* * Unload a TurboChannel SGMAP-mapped DMA map. */ void tc_bus_dmamap_unload_sgmap(t, map) bus_dma_tag_t t; bus_dmamap_t map; { struct tc_dma_slot_info *tdsi = t->_cookie; /* * Invalidate any SGMAP page table entries used by this * mapping. */ tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); /* * Do the generic bits of the unload. */ _bus_dmamap_unload(t, map); }