RING_DESC_ALIGN
RING_DESC_ALIGN);
txring->dma = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
RING_DESC_ALIGN);
rxring->dma = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
#define TX_RING_ALLOC_SIZE(s) ((s * TX_DESC_SIZE) + RING_DESC_ALIGN)
#define RX_RING_ALLOC_SIZE(s) ((s * RX_DESC_SIZE) + RING_DESC_ALIGN)