uath_tx_desc
struct uath_tx_desc *desc;
*(uint32_t *)data->buf = UATH_MAKECTL(1, sizeof (struct uath_tx_desc));
desc = (struct uath_tx_desc *)(data->buf + sizeof (uint32_t));
bzero(desc, sizeof (struct uath_tx_desc));
desc->len = htobe32(sizeof (struct uath_tx_desc));
sizeof (uint32_t) + sizeof (struct uath_tx_desc), USBD_NO_COPY |
struct uath_tx_desc *desc;
desc = (struct uath_tx_desc *)(data->buf + sizeof (uint32_t));
xferlen = sizeof (uint32_t) + sizeof (struct uath_tx_desc) + paylen;
(sizeof (uint32_t) + sizeof (struct uath_tx_desc) + IEEE80211_MAX_LEN)