diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/macb.c | 33 | ||||
| -rw-r--r-- | drivers/net/macb.h | 9 |
2 files changed, 42 insertions, 0 deletions
diff --git a/drivers/net/macb.c b/drivers/net/macb.c index f949161738..a5c188066c 100644 --- a/drivers/net/macb.c +++ b/drivers/net/macb.c @@ -54,6 +54,7 @@ struct macb_dma_desc { #define DMA_DESC_BYTES(n) (n * sizeof(struct macb_dma_desc)) #define MACB_TX_DMA_DESC_SIZE (DMA_DESC_BYTES(MACB_TX_RING_SIZE)) #define MACB_RX_DMA_DESC_SIZE (DMA_DESC_BYTES(MACB_RX_RING_SIZE)) +#define MACB_TX_DUMMY_DMA_DESC_SIZE (DMA_DESC_BYTES(1)) #define RXADDR_USED 0x00000001 #define RXADDR_WRAP 0x00000002 @@ -93,6 +94,9 @@ struct macb_device { unsigned long rx_ring_dma; unsigned long tx_ring_dma; + struct macb_dma_desc *dummy_desc; + unsigned long dummy_desc_dma; + const struct device *dev; struct eth_device netdev; unsigned short phy_addr; @@ -525,6 +529,30 @@ static int macb_phy_init(struct macb_device *macb) return 1; } +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; +} + static int macb_init(struct eth_device *netdev, bd_t *bd) { struct macb_device *macb = to_macb(netdev); @@ -565,6 +593,9 @@ static int macb_init(struct eth_device *netdev, bd_t *bd) macb_writel(macb, TBQP, macb->tx_ring_dma); if (macb_is_gem(macb)) { + /* Check the multi queue and initialize the queue for tx */ + gmac_init_multi_queues(macb); + /* * When the GMAC IP with GE feature, this bit is used to * select interface between RGMII and GMII. @@ -712,6 +743,8 @@ int macb_eth_initialize(int id, void *regs, unsigned int phy_addr) &macb->rx_ring_dma); macb->tx_ring = dma_alloc_coherent(MACB_TX_DMA_DESC_SIZE, &macb->tx_ring_dma); + macb->dummy_desc = dma_alloc_coherent(MACB_TX_DUMMY_DMA_DESC_SIZE, + &macb->dummy_desc_dma); /* TODO: we need check the rx/tx_ring_dma is dcache line aligned */ diff --git a/drivers/net/macb.h b/drivers/net/macb.h index 06f7c66dfd..5bb48f449c 100644 --- a/drivers/net/macb.h +++ b/drivers/net/macb.h @@ -60,6 +60,13 @@ /* GEM specific register offsets */ #define GEM_DCFG1 0x0280 +#define GEM_DCFG6 0x0294 + +#define MACB_MAX_QUEUES 8 + +/* GEM specific multi queues register offset */ +/* hw_q can be 0~7 */ +#define GEM_TBQP(hw_q) (0x0440 + ((hw_q) << 2)) /* Bitfields in NCR */ #define MACB_LB_OFFSET 0 @@ -309,5 +316,7 @@ readl((port)->regs + GEM_##reg) #define gem_writel(port, reg, value) \ writel((value), (port)->regs + GEM_##reg) +#define gem_writel_queue_TBQP(port, value, queue_num) \ + writel((value), (port)->regs + GEM_TBQP(queue_num)) #endif /* __DRIVERS_MACB_H__ */ |