dca_rng
error = dca_rng(softc, buf, len, req);
if (dca_rng(dca, (uchar_t *)dca->dca_buf1, RANDOM_BUFFER_SIZE,
if ((rv = dca_rng(dca, (uchar_t *)fill_buf,
struct dca_rng dp_rng;
int dca_rng(dca_t *, uchar_t *, size_t len, crypto_req_handle_t);