rx_buffer gets dma_alloc'ed but is never dma_map'ed and therefor not
flushed before it is initially used.
Map the rx_buffer when the macb is initialized and unmap it on ether_halt.
While at it, cleanup the dma_alloc_coherent rx_ring/tx_ring, too.
Signed-off-by: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
---
drivers/net/macb.c | 83 +++++++++++++++++++++++++++++++++++-------------------
1 file changed, 54 insertions(+), 29 deletions(-)
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 260c1e806a..6aae8e340d 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -63,10 +63,13 @@ struct macb_device {
unsigned int tx_head;
void *rx_buffer;
+ dma_addr_t rx_buffer_phys;
void *tx_buffer;
void *rx_packet_buf;
struct macb_dma_desc *rx_ring;
+ dma_addr_t rx_ring_phys;
struct macb_dma_desc *tx_ring;
+ dma_addr_t tx_ring_phys;
struct macb_dma_desc *gem_q1_descs;
int rx_buffer_size;
@@ -105,6 +108,7 @@ static int macb_send(struct eth_device *edev, void *packet,
int ret = 0;
uint64_t start;
unsigned int tx_head = macb->tx_head;
+ dma_addr_t packet_dma;
ctrl = MACB_BF(TX_FRMLEN, length);
ctrl |= MACB_BIT(TX_LAST);
@@ -116,10 +120,14 @@ static int macb_send(struct eth_device *edev, void *packet,
macb->tx_head++;
}
+ packet_dma = dma_map_single(macb->dev, packet, length, DMA_TO_DEVICE);
+ if (dma_mapping_error(macb->dev, packet_dma))
+ return -EFAULT;
+
macb->tx_ring[tx_head].ctrl = ctrl;
- macb->tx_ring[tx_head].addr = (ulong)packet;
+ macb->tx_ring[tx_head].addr = packet_dma;
barrier();
- dma_sync_single_for_device(macb->dev, (unsigned long)packet, length, DMA_TO_DEVICE);
+
macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
start = get_time_ns();
@@ -132,7 +140,8 @@ static int macb_send(struct eth_device *edev, void *packet,
break;
}
} while (!is_timeout(start, 100 * MSECOND));
- dma_sync_single_for_cpu(macb->dev, (unsigned long)packet, length, DMA_TO_DEVICE);
+
+ dma_unmap_single(macb->dev, packet_dma, length, DMA_TO_DEVICE);
if (ctrl & MACB_BIT(TX_UNDERRUN))
dev_err(macb->dev, "TX underrun\n");
@@ -169,7 +178,7 @@ static void reclaim_rx_buffers(struct macb_device *macb,
static int gem_recv(struct eth_device *edev)
{
struct macb_device *macb = edev->priv;
- void *buffer;
+ dma_addr_t buffer;
int length;
u32 status;
@@ -181,12 +190,12 @@ static int gem_recv(struct eth_device *edev)
barrier();
status = macb->rx_ring[macb->rx_tail].ctrl;
length = MACB_BFEXT(RX_FRMLEN, status);
- buffer = macb->rx_buffer + macb->rx_buffer_size * macb->rx_tail;
- dma_sync_single_for_cpu(macb->dev, (unsigned long)buffer, length,
- DMA_FROM_DEVICE);
- net_receive(edev, buffer, length);
- dma_sync_single_for_device(macb->dev, (unsigned long)buffer, length,
- DMA_FROM_DEVICE);
+ buffer = macb->rx_buffer_phys + macb->rx_buffer_size * macb->rx_tail;
+ dma_sync_single_for_cpu(macb->dev, buffer, length, DMA_FROM_DEVICE);
+ net_receive(edev,
+ macb->rx_buffer + macb->rx_buffer_size * macb->rx_tail,
+ length);
+ dma_sync_single_for_device(macb->dev, buffer, length, DMA_FROM_DEVICE);
macb->rx_ring[macb->rx_tail].addr &= ~MACB_BIT(RX_USED);
barrier();
@@ -202,7 +211,7 @@ static int macb_recv(struct eth_device *edev)
{
struct macb_device *macb = edev->priv;
unsigned int rx_tail = macb->rx_tail;
- void *buffer;
+ dma_addr_t buffer;
int length;
int wrapped = 0;
u32 status;
@@ -221,7 +230,7 @@ static int macb_recv(struct eth_device *edev)
}
if (status & MACB_BIT(RX_EOF)) {
- buffer = macb->rx_buffer + macb->rx_buffer_size * macb->rx_tail;
+ buffer = macb->rx_buffer_phys + macb->rx_buffer_size * macb->rx_tail;
length = MACB_BFEXT(RX_FRMLEN, status);
if (wrapped) {
unsigned int headlen, taillen;
@@ -229,23 +238,23 @@ static int macb_recv(struct eth_device *edev)
headlen = macb->rx_buffer_size * (macb->rx_ring_size
- macb->rx_tail);
taillen = length - headlen;
- dma_sync_single_for_cpu(macb->dev, (unsigned long)buffer,
- headlen, DMA_FROM_DEVICE);
- memcpy(macb->rx_packet_buf, buffer, headlen);
- dma_sync_single_for_cpu(macb->dev, (unsigned long)macb->rx_buffer,
+ dma_sync_single_for_cpu(macb->dev, buffer, headlen, DMA_FROM_DEVICE);
+ memcpy(macb->rx_packet_buf,
+ macb->rx_buffer + macb->rx_buffer_size * macb->rx_tail,
+ headlen);
+ dma_sync_single_for_cpu(macb->dev, macb->rx_buffer_phys,
taillen, DMA_FROM_DEVICE);
memcpy(macb->rx_packet_buf + headlen, macb->rx_buffer, taillen);
- dma_sync_single_for_device(macb->dev, (unsigned long)buffer,
- headlen, DMA_FROM_DEVICE);
- dma_sync_single_for_device(macb->dev, (unsigned long)macb->rx_buffer,
+ dma_sync_single_for_device(macb->dev, buffer, headlen, DMA_FROM_DEVICE);
+ dma_sync_single_for_device(macb->dev, macb->rx_buffer_phys,
taillen, DMA_FROM_DEVICE);
net_receive(edev, macb->rx_packet_buf, length);
} else {
- dma_sync_single_for_cpu(macb->dev, (unsigned long)buffer, length,
- DMA_FROM_DEVICE);
- net_receive(edev, buffer, length);
- dma_sync_single_for_device(macb->dev, (unsigned long)buffer, length,
- DMA_FROM_DEVICE);
+ dma_sync_single_for_cpu(macb->dev, buffer, length, DMA_FROM_DEVICE);
+ net_receive(edev,
+ macb->rx_buffer + macb->rx_buffer_size * macb->rx_tail,
+ length);
+ dma_sync_single_for_device(macb->dev, buffer, length, DMA_FROM_DEVICE);
}
barrier();
if (++rx_tail >= macb->rx_ring_size)
@@ -377,7 +386,7 @@ static int gmac_init_dummy_tx_queues(struct macb_device *macb)
return 0;
}
-static void macb_init(struct macb_device *macb)
+static int macb_init(struct macb_device *macb)
{
unsigned long paddr, val = 0;
int i;
@@ -386,6 +395,11 @@ static void macb_init(struct macb_device *macb)
* macb_halt should have been called at some point before now,
* so we'll assume the controller is idle.
*/
+ macb->rx_buffer_phys = dma_map_single(macb->dev, macb->rx_buffer,
+ macb->rx_buffer_size * macb->rx_ring_size,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(macb->dev, macb->rx_buffer_phys))
+ return -EFAULT;
/* initialize DMA descriptors */
paddr = (ulong)macb->rx_buffer;
@@ -442,6 +456,7 @@ static void macb_init(struct macb_device *macb)
macb_or_gem_writel(macb, USRIO, val);
+ return 0;
}
static void macb_halt(struct eth_device *edev)
@@ -460,6 +475,13 @@ static void macb_halt(struct eth_device *edev)
/* Disable TX and RX, and clear statistics */
macb_writel(macb, NCR, MACB_BIT(CLRSTAT));
+
+ dma_unmap_single(macb->dev, macb->rx_buffer_phys,
+ macb->rx_buffer_size * macb->rx_ring_size,
+ DMA_FROM_DEVICE);
+ free(macb->rx_buffer);
+ dma_free_coherent((void *)macb->rx_ring, macb->rx_ring_phys, RX_RING_BYTES(macb));
+ dma_free_coherent((void *)macb->tx_ring, macb->tx_ring_phys, TX_RING_BYTES);
}
static int macb_phy_read(struct mii_bus *bus, int addr, int reg)
@@ -780,6 +802,7 @@ static int macb_probe(struct device *dev)
const char *pclk_name, *hclk_name;
const struct macb_config *config = NULL;
u32 ncfgr;
+ int ret;
macb = xzalloc(sizeof(*macb));
edev = &macb->netdev;
@@ -877,7 +900,7 @@ static int macb_probe(struct device *dev)
clk_enable(macb->rxclk);
if (config) {
- int ret = config->txclk_init(dev, &macb->txclk);
+ ret = config->txclk_init(dev, &macb->txclk);
if (ret)
return ret;
}
@@ -891,8 +914,8 @@ static int macb_probe(struct device *dev)
macb_init_rx_buffer_size(macb, PKTSIZE);
macb->rx_buffer = dma_alloc(macb->rx_buffer_size * macb->rx_ring_size);
- macb->rx_ring = dma_alloc_coherent(RX_RING_BYTES(macb), DMA_ADDRESS_BROKEN);
- macb->tx_ring = dma_alloc_coherent(TX_RING_BYTES, DMA_ADDRESS_BROKEN);
+ macb->rx_ring = dma_alloc_coherent(RX_RING_BYTES(macb), &macb->rx_ring_phys);
+ macb->tx_ring = dma_alloc_coherent(TX_RING_BYTES, &macb->tx_ring_phys);
if (macb->is_gem)
macb->gem_q1_descs = dma_alloc_coherent(GEM_Q1_DESC_BYTES,
@@ -907,7 +930,9 @@ static int macb_probe(struct device *dev)
ncfgr |= macb_dbw(macb);
macb_writel(macb, NCFGR, ncfgr);
- macb_init(macb);
+ ret = macb_init(macb);
+ if (ret)
+ return ret;
mdiobus_register(&macb->miibus);
eth_register(edev);
--
2.40.1
