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implement _bus_dmamap_load_raw, ok skrll@

This commit is contained in:
jmcneill 2015-10-18 15:34:08 +00:00
parent 8c41569f24
commit 4b8e1c344f
1 changed files with 40 additions and 4 deletions
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44
sys/arch/arm/arm32/bus_dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: bus_dma.c,v 1.93 2015/08/24 04:51:18 matt Exp $ */
/* $NetBSD: bus_dma.c,v 1.94 2015/10/18 15:34:08 jmcneill Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@ -35,7 +35,7 @@
#include "opt_arm_bus_space.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.93 2015/08/24 04:51:18 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.94 2015/10/18 15:34:08 jmcneill Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -734,10 +734,46 @@ _bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio,
*/
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)
{
panic("_bus_dmamap_load_raw: not implemented");
bus_size_t size;
int i, error = 0;
/*
* Make sure that on error conditions 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_paddr(t, map, ds->ds_addr,
sgsize, false);
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;
}
/*