Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *	NET3:	802.3 data link hooks used for IPX 802.3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *	802.3 isn't really a protocol data link layer. Some old IPX stuff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *	uses it however. Note that there is only one 802.3 protocol layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *	in the system. We don't currently support different protocols
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *	running raw 802.3 on different devices. Thankfully nobody else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *	has done anything like the old IPX.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <net/datalink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/p8022.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  *	Place an 802.3 header on a packet. The driver will do the mac
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  *	addresses, we just need to give it the buffer length.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static int p8023_request(struct datalink_proto *dl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 			 struct sk_buff *skb, unsigned char *dest_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	struct net_device *dev = skb->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	dev_hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	return dev_queue_xmit(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  *	Create an 802.3 client. Note there can be only one 802.3 client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct datalink_proto *make_8023_client(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	if (proto) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		proto->header_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		proto->request	     = p8023_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	return proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)  *	Destroy the 802.3 client.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) void destroy_8023_client(struct datalink_proto *dl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	kfree(dl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) EXPORT_SYMBOL(destroy_8023_client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) EXPORT_SYMBOL(make_8023_client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) MODULE_LICENSE("GPL");