263 lines
6.7 KiB
C
263 lines
6.7 KiB
C
/* $NetBSD: tc_dma_3000_500.c,v 1.3 1997/09/02 13:20:31 thorpej Exp $ */
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/*-
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* Copyright (c) 1997 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/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.3 1997/09/02 13:20:31 thorpej Exp $");
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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/malloc.h>
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#include <vm/vm.h>
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#define _ALPHA_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <dev/tc/tcvar.h>
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#include <alpha/tc/tc_sgmap.h>
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#include <alpha/tc/tc_dma_3000_500.h>
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struct alpha_bus_dma_tag tc_dmat_sgmap = {
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NULL, /* _cookie */
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NULL, /* _get_tag */
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tc_bus_dmamap_create_sgmap,
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tc_bus_dmamap_destroy_sgmap,
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tc_bus_dmamap_load_sgmap,
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tc_bus_dmamap_load_mbuf_sgmap,
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tc_bus_dmamap_load_uio_sgmap,
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tc_bus_dmamap_load_raw_sgmap,
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tc_bus_dmamap_unload_sgmap,
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NULL, /* _dmamap_sync */
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_bus_dmamem_alloc,
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_bus_dmamem_free,
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_bus_dmamem_map,
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_bus_dmamem_unmap,
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_bus_dmamem_mmap,
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};
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struct tc_dma_slot_info {
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struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */
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struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */
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};
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struct tc_dma_slot_info *tc_dma_slot_info;
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void
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tc_dma_init_3000_500(nslots)
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int nslots;
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{
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extern struct alpha_bus_dma_tag tc_dmat_direct;
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size_t sisize;
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int i;
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/* Allocate per-slot DMA info. */
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sisize = nslots * sizeof(struct tc_dma_slot_info);
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tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT);
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if (tc_dma_slot_info == NULL)
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panic("tc_dma_init: can't allocate per-slot DMA info");
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bzero(tc_dma_slot_info, sisize);
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/* Default all slots to direct-mapped. */
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for (i = 0; i < nslots; i++)
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bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat,
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sizeof(tc_dma_slot_info[i].tdsi_dmat));
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}
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/*
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* Return the DMA tag for the given slot.
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*/
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bus_dma_tag_t
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tc_dma_get_tag_3000_500(slot)
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int slot;
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{
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return (&tc_dma_slot_info[slot].tdsi_dmat);
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}
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/*
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* Create a TurboChannel SGMAP-mapped DMA map.
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*/
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int
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tc_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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struct tc_dma_slot_info *tdsi = t->_cookie;
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struct alpha_sgmap_cookie *a;
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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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a = malloc(sizeof(struct alpha_sgmap_cookie), M_DEVBUF,
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(flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK);
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if (a == NULL) {
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_bus_dmamap_destroy(t, map);
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return (ENOMEM);
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}
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bzero(a, sizeof(struct alpha_sgmap_cookie));
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map->_dm_sgcookie = a;
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if (flags & BUS_DMA_ALLOCNOW) {
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error = alpha_sgmap_alloc(map, round_page(size),
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&tdsi->tdsi_sgmap, flags);
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if (error)
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tc_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 TurboChannel SGMAP-mapped DMA map.
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*/
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void
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tc_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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struct tc_dma_slot_info *tdsi = t->_cookie;
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struct alpha_sgmap_cookie *a = map->_dm_sgcookie;
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if (a->apdc_flags & APDC_HAS_SGMAP)
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alpha_sgmap_free(&tdsi->tdsi_sgmap, a);
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free(a, M_DEVBUF);
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_bus_dmamap_destroy(t, map);
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}
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/*
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* Load a TurboChannel SGMAP-mapped DMA map with a linear buffer.
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*/
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int
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tc_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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struct tc_dma_slot_info *tdsi = t->_cookie;
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return (tc_sgmap_load(t, map, buf, buflen, p, flags,
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&tdsi->tdsi_sgmap));
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}
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/*
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* Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain.
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*/
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int
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tc_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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struct tc_dma_slot_info *tdsi = t->_cookie;
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return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap));
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}
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/*
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* Load a TurboChannel SGMAP-mapped DMA map with a uio.
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*/
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int
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tc_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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struct tc_dma_slot_info *tdsi = t->_cookie;
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return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap));
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}
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/*
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* Load a TurboChannel SGMAP-mapped DMA map with raw memory.
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*/
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int
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tc_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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struct tc_dma_slot_info *tdsi = t->_cookie;
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return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags,
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&tdsi->tdsi_sgmap));
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}
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/*
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* Unload a TurboChannel SGMAP-mapped DMA map.
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*/
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void
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tc_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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struct tc_dma_slot_info *tdsi = t->_cookie;
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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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tc_sgmap_unload(t, map, &tdsi->tdsi_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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