ubsec_ctx_rngbypass
struct ubsec_ctx_rngbypass *ctx;
ctx = (struct ubsec_ctx_rngbypass *)rng->rng_q.q_ctx.dma_vaddr;
ctx->rbp_len = htole16(sizeof(struct ubsec_ctx_rngbypass));
if (ubsec_dma_malloc(sc, sizeof(struct ubsec_ctx_rngbypass),