static int
_bus_dma_alloc_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map,
bus_size_t size, int flags)
{
struct mips_bus_dma_cookie *cookie = map->_dm_cookie;
int error = 0;
#ifdef DIAGNOSTIC
if (cookie == NULL)
panic("_bus_dma_alloc_bouncebuf: no cookie");
#endif
cookie->id_bouncebuflen = round_page(size);
error = _bus_dmamem_alloc(t, cookie->id_bouncebuflen,
PAGE_SIZE, map->_dm_boundary, cookie->id_bouncesegs,
map->_dm_segcnt, &cookie->id_nbouncesegs, flags);
if (error)
goto out;
error = _bus_dmamem_map(t, cookie->id_bouncesegs,
cookie->id_nbouncesegs, cookie->id_bouncebuflen,
(void **)&cookie->id_bouncebuf, flags);
out:
if (error) {
_bus_dmamem_free(t, cookie->id_bouncesegs,
cookie->id_nbouncesegs);
cookie->id_bouncebuflen = 0;
cookie->id_nbouncesegs = 0;
} else {
cookie->id_flags |= _BUS_DMA_HAS_BOUNCE;
}
return (error);
}
int
isadma_bounce_alloc_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map,
bus_size_t size, int flags)
{
struct isadma_bounce_cookie *cookie = map->_dm_cookie;
int error = 0;
cookie->id_bouncebuflen = round_page(size);
error = isadma_bounce_dmamem_alloc(t, cookie->id_bouncebuflen,
PAGE_SIZE, map->_dm_boundary, cookie->id_bouncesegs,
map->_dm_segcnt, &cookie->id_nbouncesegs, flags);
if (error)
goto out;
error = _bus_dmamem_map(t, cookie->id_bouncesegs,
cookie->id_nbouncesegs, cookie->id_bouncebuflen,
(caddr_t *)&cookie->id_bouncebuf, flags);
out:
if (error) {
_bus_dmamem_free(t, cookie->id_bouncesegs,
cookie->id_nbouncesegs);
cookie->id_bouncebuflen = 0;
cookie->id_nbouncesegs = 0;
} else
cookie->id_flags |= ID_HAS_BOUNCE;
return (error);
}
/*
* Map ISA DMA-safe memory into kernel virtual address space.
*/
int
_isa_bus_dmamem_map(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs,
size_t size, caddr_t *kvap, int flags)
{
return (_bus_dmamem_map(t, segs, nsegs, size, kvap, flags));
}