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Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/macb.c61
1 files changed, 57 insertions, 4 deletions
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 750331d..01a94a4 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -51,6 +51,10 @@ struct macb_dma_desc {
u32 ctrl;
};
+#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 RXADDR_USED 0x00000001
#define RXADDR_WRAP 0x00000002
@@ -194,6 +198,39 @@ int macb_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value)
}
#endif
+#define RX 1
+#define TX 0
+static inline void macb_invalidate_ring_desc(struct macb_device *macb, bool rx)
+{
+ if (rx)
+ invalidate_dcache_range(macb->rx_ring_dma, macb->rx_ring_dma +
+ MACB_RX_DMA_DESC_SIZE);
+ else
+ invalidate_dcache_range(macb->tx_ring_dma, macb->tx_ring_dma +
+ MACB_TX_DMA_DESC_SIZE);
+}
+
+static inline void macb_flush_ring_desc(struct macb_device *macb, bool rx)
+{
+ if (rx)
+ flush_dcache_range(macb->rx_ring_dma, macb->rx_ring_dma +
+ MACB_RX_DMA_DESC_SIZE);
+ else
+ flush_dcache_range(macb->tx_ring_dma, macb->tx_ring_dma +
+ MACB_TX_DMA_DESC_SIZE);
+}
+
+static inline void macb_flush_rx_buffer(struct macb_device *macb)
+{
+ flush_dcache_range(macb->rx_buffer_dma, macb->rx_buffer_dma +
+ MACB_RX_BUFFER_SIZE);
+}
+
+static inline void macb_invalidate_rx_buffer(struct macb_device *macb)
+{
+ invalidate_dcache_range(macb->rx_buffer_dma, macb->rx_buffer_dma +
+ MACB_RX_BUFFER_SIZE);
+}
#if defined(CONFIG_CMD_NET)
@@ -218,6 +255,9 @@ static int macb_send(struct eth_device *netdev, void *packet, int length)
macb->tx_ring[tx_head].ctrl = ctrl;
macb->tx_ring[tx_head].addr = paddr;
barrier();
+ macb_flush_ring_desc(macb, TX);
+ /* Do we need check paddr and length is dcache line aligned? */
+ flush_dcache_range(paddr, paddr + length);
macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
/*
@@ -226,6 +266,7 @@ static int macb_send(struct eth_device *netdev, void *packet, int length)
*/
for (i = 0; i <= MACB_TX_TIMEOUT; i++) {
barrier();
+ macb_invalidate_ring_desc(macb, TX);
ctrl = macb->tx_ring[tx_head].ctrl;
if (ctrl & TXBUF_USED)
break;
@@ -254,6 +295,8 @@ static void reclaim_rx_buffers(struct macb_device *macb,
unsigned int i;
i = macb->rx_tail;
+
+ macb_invalidate_ring_desc(macb, RX);
while (i > new_tail) {
macb->rx_ring[i].addr &= ~RXADDR_USED;
i++;
@@ -267,6 +310,7 @@ static void reclaim_rx_buffers(struct macb_device *macb,
}
barrier();
+ macb_flush_ring_desc(macb, RX);
macb->rx_tail = new_tail;
}
@@ -280,6 +324,8 @@ static int macb_recv(struct eth_device *netdev)
u32 status;
for (;;) {
+ macb_invalidate_ring_desc(macb, RX);
+
if (!(macb->rx_ring[rx_tail].addr & RXADDR_USED))
return -1;
@@ -293,6 +339,8 @@ static int macb_recv(struct eth_device *netdev)
if (status & RXBUF_FRAME_END) {
buffer = macb->rx_buffer + 128 * macb->rx_tail;
length = status & RXBUF_FRMLEN_MASK;
+
+ macb_invalidate_rx_buffer(macb);
if (wrapped) {
unsigned int headlen, taillen;
@@ -506,6 +554,9 @@ static int macb_init(struct eth_device *netdev, bd_t *bd)
macb->rx_ring[i].ctrl = 0;
paddr += 128;
}
+ macb_flush_ring_desc(macb, RX);
+ macb_flush_rx_buffer(macb);
+
for (i = 0; i < MACB_TX_RING_SIZE; i++) {
macb->tx_ring[i].addr = 0;
if (i == (MACB_TX_RING_SIZE - 1))
@@ -513,6 +564,8 @@ static int macb_init(struct eth_device *netdev, bd_t *bd)
else
macb->tx_ring[i].ctrl = TXBUF_USED;
}
+ macb_flush_ring_desc(macb, TX);
+
macb->rx_tail = 0;
macb->tx_head = 0;
macb->tx_tail = 0;
@@ -658,13 +711,13 @@ int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
macb->rx_buffer = dma_alloc_coherent(MACB_RX_BUFFER_SIZE,
&macb->rx_buffer_dma);
- macb->rx_ring = dma_alloc_coherent(MACB_RX_RING_SIZE
- * sizeof(struct macb_dma_desc),
+ macb->rx_ring = dma_alloc_coherent(MACB_RX_DMA_DESC_SIZE,
&macb->rx_ring_dma);
- macb->tx_ring = dma_alloc_coherent(MACB_TX_RING_SIZE
- * sizeof(struct macb_dma_desc),
+ macb->tx_ring = dma_alloc_coherent(MACB_TX_DMA_DESC_SIZE,
&macb->tx_ring_dma);
+ /* TODO: we need check the rx/tx_ring_dma is dcache line aligned */
+
macb->regs = regs;
macb->phy_addr = phy_addr;