RX_LOG_RING_SIZE
#define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
#define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
#define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
MEM->init.rlen = (RX_LOG_RING_SIZE << 13) |
MEM->init.rlen = (RX_LOG_RING_SIZE << 13) |
#define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)