[U-Boot] [PATCH 1/5] net: fec_mxc: Fix DM driver issue in recv

[Peng Fan]

From: Ye Li <ye.li at nxp.com>

When using ethernet DM driver, the recv interface has a
change with non-DM interface, that driver needs to set
the packet pointer and provide it to upper layer to process.

In fec driver, the fecmxc_recv functions does not handle the
packet pointer parameter. This may cause crash in upper layer
processing because the packet pointer is not set.

This patch allocates a buffer for the packet pointer and free it
through free_pkt interface.

Signed-off-by: Ye Li <ye.li at nxp.com>
Reviewed-by: Peng Fan <peng.fan at nxp.com>
---
 drivers/net/fec_mxc.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index ff7ad91116..7c396d8d95 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -806,7 +806,16 @@ static int fec_recv(struct eth_device *dev)
 	uint16_t bd_status;
 	ulong addr, size, end;
 	int i;
+
+#ifdef CONFIG_DM_ETH
+	*packetp = memalign(ARCH_DMA_MINALIGN, FEC_MAX_PKT_SIZE);
+	if (*packetp == 0) {
+		printf("%s: error allocating packetp\n", __func__);
+		return -ENOMEM;
+	}
+#else
 	ALLOC_CACHE_ALIGN_BUFFER(uchar, buff, FEC_MAX_PKT_SIZE);
+#endif
 
 	/* Check if any critical events have happened */
 	ievent = readl(&fec->eth->ievent);
@@ -882,8 +891,13 @@ static int fec_recv(struct eth_device *dev)
 #ifdef CONFIG_FEC_MXC_SWAP_PACKET
 			swap_packet((uint32_t *)addr, frame_length);
 #endif
+
+#ifdef CONFIG_DM_ETH
+			memcpy(*packetp, (char *)addr, frame_length);
+#else
 			memcpy(buff, (char *)addr, frame_length);
 			net_process_received_packet(buff, frame_length);
+#endif
 			len = frame_length;
 		} else {
 			if (bd_status & FEC_RBD_ERR)
@@ -917,6 +931,16 @@ static int fec_recv(struct eth_device *dev)
 	return len;
 }
 
+static int fecmxc_free_pkt(struct udevice *dev, uchar *packet, int length)
+{
+#ifdef CONFIG_DM_ETH
+	if (packet)
+		free(packet);
+#endif
+
+	return 0;
+}
+
 static void fec_set_dev_name(char *dest, int dev_id)
 {
 	sprintf(dest, (dev_id == -1) ? "FEC" : "FEC%i", dev_id);
@@ -1205,6 +1229,7 @@ static const struct eth_ops fecmxc_ops = {
 	.start			= fecmxc_init,
 	.send			= fecmxc_send,
 	.recv			= fecmxc_recv,
+	.free_pkt		= fecmxc_free_pkt,
 	.stop			= fecmxc_halt,
 	.write_hwaddr		= fecmxc_set_hwaddr,
 	.read_rom_hwaddr	= fecmxc_read_rom_hwaddr,
-- 
2.14.1