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      1 /*	$NetBSD: bus_stubs.c,v 1.1 2023/05/07 12:41:48 skrll Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Maxime Villard.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: bus_stubs.c,v 1.1 2023/05/07 12:41:48 skrll Exp $");
     34 
     35 #include <sys/systm.h>
     36 #include <sys/asan.h>
     37 
     38 #include <machine/bus_defs.h>
     39 #include <machine/bus_funcs.h>
     40 
     41 int
     42 bus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments,
     43     bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp)
     44 {
     45 	return (*t->_dmamap_create)(t, size, nsegments, maxsegsz, boundary,
     46 	    flags, dmamp);
     47 }
     48 
     49 void
     50 bus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t dmam)
     51 {
     52 	(*t->_dmamap_destroy)(t, dmam);
     53 }
     54 
     55 int
     56 bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t dmam, void *buf,
     57     bus_size_t buflen, struct proc *p, int flags)
     58 {
     59 	kasan_dma_load(dmam, buf, buflen, KASAN_DMA_LINEAR);
     60 	return (*t->_dmamap_load)(t, dmam, buf, buflen, p, flags);
     61 }
     62 
     63 int
     64 bus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t dmam, struct mbuf *chain,
     65     int flags)
     66 {
     67 	kasan_dma_load(dmam, chain, 0, KASAN_DMA_MBUF);
     68 	return (*t->_dmamap_load_mbuf)(t, dmam, chain, flags);
     69 }
     70 
     71 int
     72 bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t dmam, struct uio *uio,
     73     int flags)
     74 {
     75 	kasan_dma_load(dmam, uio, 0, KASAN_DMA_UIO);
     76 	return (*t->_dmamap_load_uio)(t, dmam, uio, flags);
     77 }
     78 
     79 int
     80 bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t dmam, bus_dma_segment_t *segs,
     81     int nsegs, bus_size_t size, int flags)
     82 {
     83 	return (*t->_dmamap_load_raw)(t, dmam, segs, nsegs, size, flags);
     84 }
     85 
     86 void
     87 bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t dmam)
     88 {
     89 	(*t->_dmamap_unload)(t, dmam);
     90 }
     91 
     92 void
     93 bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t p, bus_addr_t o, bus_size_t l,
     94     int ops)
     95 {
     96 	kasan_dma_sync(p, o, l, ops);
     97 
     98 	(*t->_dmamap_sync)(t, p, o, l, ops);
     99 }
    100