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Add bus_dmamap_load_mbuf_sg() to powerpc.

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This commit is contained in:
scottl 2005-01-15 19:55:25 +00:00
parent 7c9c98e639
commit 5c70871d36
2 changed files with 32 additions and 0 deletions
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3
sys/powerpc/include/bus.h
View File

@ -890,6 +890,9 @@ int bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map,
struct mbuf *mbuf,
bus_dmamap_callback2_t *callback, void *callback_arg,
int flags);
int bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map,
struct mbuf *mbuf, bus_dma_segment_t *segs,
int *nsegs, int flags);
/*
* Like bus_dmamap_load but for uios. Note the use of the
* bus_dmamap_callback2_t interface.

29
sys/powerpc/powerpc/busdma_machdep.c
View File

@ -500,6 +500,35 @@ bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
return (error);
}
int
bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
bus_dma_segment_t *segs, int *nsegs, int flags)
{
int error = 0;
M_ASSERTPKTHDR(m0);
if (m0->m_pkthdr.len <= dmat->maxsize) {
int first = 1;
vm_offset_t lastaddr = 0;
struct mbuf *m;
for (m = m0; m != NULL && error == 0; m = m->m_next) {
if (m->m_len > 0) {
error = bus_dmamap_load_buffer(dmat,
segs, m->m_data, m->m_len, NULL,
flags, &lastaddr, nsegs, first);
first = 0;
}
}
++*nsegs;
} else {
error = EINVAL;
}
return (error);
}
/*
* Like bus_dmamap_load(), but for uios.
*/