CMD_ENTRIES
if (txp_dma_malloc(sc, sizeof(struct txp_cmd_desc) * CMD_ENTRIES,
bzero(sc->sc_cmdring_dma.dma_vaddr, sizeof(struct txp_cmd_desc) * CMD_ENTRIES);
boot->br_cmd_siz = htole32(CMD_ENTRIES * sizeof(struct txp_cmd_desc));
sc->sc_cmdring.size = CMD_ENTRIES * sizeof(struct txp_cmd_desc);
boot->br_resp_siz = htole32(CMD_ENTRIES * sizeof(struct txp_rsp_desc));