diff options
| -rw-r--r-- | include/net.h | 8 | ||||
| -rw-r--r-- | net/eth.c | 4 |
2 files changed, 10 insertions, 2 deletions
diff --git a/include/net.h b/include/net.h index e7f28d7..35602cd 100644 --- a/include/net.h +++ b/include/net.h @@ -97,7 +97,12 @@ struct eth_pdata { * send: Send the bytes passed in "packet" as a packet on the wire * recv: Check if the hardware received a packet. If so, set the pointer to the * packet buffer in the packetp parameter. If not, return an error or 0 to - * indicate that the hardware receive FIFO is empty + * indicate that the hardware receive FIFO is empty. If 0 is returned, the + * network stack will not process the empty packet, but free_pkt() will be + * called if supplied + * free_pkt: Give the driver an opportunity to manage its packet buffer memory + * when the network stack is finished processing it. This will only be + * called when no error was returned from recv - optional * stop: Stop the hardware from looking for packets - may be called even if * state == PASSIVE * mcast: Join or leave a multicast group (for TFTP) - optional @@ -113,6 +118,7 @@ struct eth_ops { int (*start)(struct udevice *dev); int (*send)(struct udevice *dev, void *packet, int length); int (*recv)(struct udevice *dev, uchar **packetp); + int (*free_pkt)(struct udevice *dev, uchar *packet, int length); void (*stop)(struct udevice *dev); #ifdef CONFIG_MCAST_TFTP int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join); @@ -344,7 +344,9 @@ int eth_rx(void) ret = eth_get_ops(current)->recv(current, &packet); if (ret > 0) net_process_received_packet(packet, ret); - else + if (ret >= 0 && eth_get_ops(current)->free_pkt) + eth_get_ops(current)->free_pkt(current, packet, ret); + if (ret <= 0) break; } if (ret == -EAGAIN) |