IDMAC_DES0_CH
des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH;
desc64->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH;
desc64_last->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC);
desc_last->des0 &= cpu_to_le32(~(IDMAC_DES0_CH | IDMAC_DES0_DIC));