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Add an untested implementation of bus_dmamap_load_raw(9).

This commit is contained in:
dyoung 2011-09-28 01:33:26 +00:00
parent 109ec163ae
commit 9115bf9945
1 changed files with 38 additions and 5 deletions
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43
sys/arch/x86/x86/bus_dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: bus_dma.c,v 1.63 2011/09/27 23:44:18 dyoung Exp $ */
/* $NetBSD: bus_dma.c,v 1.64 2011/09/28 01:33:26 dyoung Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998, 2007 The NetBSD Foundation, Inc.
@ -31,7 +31,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.63 2011/09/27 23:44:18 dyoung Exp $");
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.64 2011/09/28 01:33:26 dyoung Exp $");
/*
* The following is included because _bus_dma_uiomove is derived from
@ -716,11 +716,44 @@ _bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio,
*/
static int
_bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map,
bus_dma_segment_t *segs, int nsegs,
bus_size_t size, int flags)
bus_dma_segment_t *segs, int nsegs, bus_size_t size0, int flags)
{
bus_size_t size;
int i, error = 0;
panic("_bus_dmamap_load_raw: not implemented");
/*
* Make sure that on error condition we return "no valid mappings."
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
KASSERT(map->dm_maxsegsz <= map->_dm_maxmaxsegsz);
if (size0 > map->_dm_size)
return EINVAL;
for (i = 0, size = size0; i < nsegs && size > 0; i++) {
bus_dma_segment_t *ds = &segs[i];
bus_size_t sgsize;
sgsize = MIN(ds->ds_len, size);
if (sgsize == 0)
continue;
error = _bus_dmamap_load_busaddr(t, map, ds->ds_addr, sgsize);
if (error != 0)
break;
size -= sgsize;
}
if (error != 0) {
map->dm_mapsize = 0;
map->dm_nsegs = 0;
return error;
}
/* XXX TBD bounce */
map->dm_mapsize = size0;
return 0;
}
/*