+static int gmac_init_multi_queues(struct macb_device *macb)
+{
+ int i, num_queues = 1;
+ u32 queue_mask;
+
+ /* bit 0 is never set but queue 0 always exists */
+ queue_mask = gem_readl(macb, DCFG6) & 0xff;
+ queue_mask |= 0x1;
+
+ for (i = 1; i < MACB_MAX_QUEUES; i++)
+ if (queue_mask & (1 << i))
+ num_queues++;
+
+ macb->dummy_desc->ctrl = TXBUF_USED;
+ macb->dummy_desc->addr = 0;
+ flush_dcache_range(macb->dummy_desc_dma, macb->dummy_desc_dma +
+ MACB_TX_DUMMY_DMA_DESC_SIZE);
+
+ for (i = 1; i < num_queues; i++)
+ gem_writel_queue_TBQP(macb, macb->dummy_desc_dma, i - 1);
+
+ return 0;
+}
+