NUM_TX_RINGS
#define NUM_TX_BD (TX_DESC_CNT * NUM_TX_RINGS)
#define MAX_TX_AVAIL (MAX_TX_DESC_CNT * NUM_TX_RINGS - 2)
for (i = 1; i <= NUM_TX_RINGS; i++) {
BCM_PAGE_SIZE*(i % NUM_TX_RINGS)));
BCM_PAGE_SIZE*(i % NUM_TX_RINGS)));