GMAC_CHAN_CONTROL
mode = dwqe_read(sc, GMAC_CHAN_CONTROL(0));
dwqe_write(sc, GMAC_CHAN_CONTROL(0), mode);
#define GMAC_CHAN_RX_WATCHDOG(x) (GMAC_CHAN_CONTROL(x) + 0x38)
#define GMAC_CHAN_SLOT_CTRL_STATUS(x) (GMAC_CHAN_CONTROL(x) + 0x3c)
#define GMAC_CHAN_CUR_TX_DESC(x) (GMAC_CHAN_CONTROL(x) + 0x44)
#define GMAC_CHAN_CUR_RX_DESC(x) (GMAC_CHAN_CONTROL(x) + 0x4c)
#define GMAC_CHAN_CUR_TX_BUF_ADDR(x) (GMAC_CHAN_CONTROL(x) + 0x54)
#define GMAC_CHAN_CUR_RX_BUF_ADDR(x) (GMAC_CHAN_CONTROL(x) + 0x5c)
#define GMAC_CHAN_STATUS(x) (GMAC_CHAN_CONTROL(x) + 0x60)