/*
* Linux ARCnet driver - "raw mode" packet encapsulation (no soft headers)
- *
+ *
* Written 1994-1999 by Avery Pennarun.
* Derived from skeleton.c by Donald Becker.
*
* **********************
*/
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/init.h>
#include <net/arp.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
-#include <linux/arcdevice.h>
-
-#define VERSION "arcnet: raw mode (`r') encapsulation support loaded.\n"
-
-
-static void rx(struct net_device *dev, int bufnum,
- struct archdr *pkthdr, int length);
-static int build_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, uint8_t daddr);
-static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
- int bufnum);
-
-static struct ArcProto rawmode_proto =
-{
- .suffix = 'r',
- .mtu = XMTU,
- .rx = rx,
- .build_header = build_header,
- .prepare_tx = prepare_tx,
- .continue_tx = NULL,
- .ack_tx = NULL
-};
-
-
-static int __init arcnet_raw_init(void)
-{
- int count;
-
- printk(VERSION);
-
- for (count = 0; count < 256; count++)
- if (arc_proto_map[count] == arc_proto_default)
- arc_proto_map[count] = &rawmode_proto;
-
- /* for raw mode, we only set the bcast proto if there's no better one */
- if (arc_bcast_proto == arc_proto_default)
- arc_bcast_proto = &rawmode_proto;
-
- arc_proto_default = &rawmode_proto;
- return 0;
-}
-
-static void __exit arcnet_raw_exit(void)
-{
- arcnet_unregister_proto(&rawmode_proto);
-}
-
-module_init(arcnet_raw_init);
-module_exit(arcnet_raw_exit);
-
-MODULE_LICENSE("GPL");
-
+#include "arcdevice.h"
/* packet receiver */
static void rx(struct net_device *dev, int bufnum,
struct archdr *pkt = pkthdr;
int ofs;
- BUGMSG(D_DURING, "it's a raw packet (length=%d)\n", length);
+ arc_printk(D_DURING, dev, "it's a raw packet (length=%d)\n", length);
if (length > MTU)
ofs = 512 - length;
ofs = 256 - length;
skb = alloc_skb(length + ARC_HDR_SIZE, GFP_ATOMIC);
- if (skb == NULL) {
- BUGMSG(D_NORMAL, "Memory squeeze, dropping packet.\n");
+ if (!skb) {
dev->stats.rx_dropped++;
return;
}
skb_put(skb, length + ARC_HDR_SIZE);
skb->dev = dev;
- pkt = (struct archdr *) skb->data;
+ pkt = (struct archdr *)skb->data;
skb_reset_mac_header(skb);
skb_pull(skb, ARC_HDR_SIZE);
pkt->soft.raw + sizeof(pkt->soft),
length - sizeof(pkt->soft));
- BUGLVL(D_SKB) arcnet_dump_skb(dev, skb, "rx");
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, skb, "rx");
skb->protocol = cpu_to_be16(ETH_P_ARCNET);
netif_rx(skb);
}
-
-/*
- * Create the ARCnet hard/soft headers for raw mode.
+/* Create the ARCnet hard/soft headers for raw mode.
* There aren't any soft headers in raw mode - not even the protocol id.
*/
static int build_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, uint8_t daddr)
{
int hdr_size = ARC_HDR_SIZE;
- struct archdr *pkt = (struct archdr *) skb_push(skb, hdr_size);
+ struct archdr *pkt = (struct archdr *)skb_push(skb, hdr_size);
- /*
- * Set the source hardware address.
+ /* Set the source hardware address.
*
* This is pretty pointless for most purposes, but it can help in
- * debugging. ARCnet does not allow us to change the source address in
- * the actual packet sent)
+ * debugging. ARCnet does not allow us to change the source address
+ * in the actual packet sent.
*/
pkt->hard.source = *dev->dev_addr;
/* see linux/net/ethernet/eth.c to see where I got the following */
if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
- /*
- * FIXME: fill in the last byte of the dest ipaddr here to better
- * comply with RFC1051 in "noarp" mode.
+ /* FIXME: fill in the last byte of the dest ipaddr here
+ * to better comply with RFC1051 in "noarp" mode.
*/
pkt->hard.dest = 0;
return hdr_size;
return hdr_size; /* success */
}
-
static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
int bufnum)
{
struct arc_hardware *hard = &pkt->hard;
int ofs;
- BUGMSG(D_DURING, "prepare_tx: txbufs=%d/%d/%d\n",
- lp->next_tx, lp->cur_tx, bufnum);
+ arc_printk(D_DURING, dev, "prepare_tx: txbufs=%d/%d/%d\n",
+ lp->next_tx, lp->cur_tx, bufnum);
- length -= ARC_HDR_SIZE; /* hard header is not included in packet length */
+ /* hard header is not included in packet length */
+ length -= ARC_HDR_SIZE;
if (length > XMTU) {
/* should never happen! other people already check for this. */
- BUGMSG(D_NORMAL, "Bug! prepare_tx with size %d (> %d)\n",
- length, XMTU);
+ arc_printk(D_NORMAL, dev, "Bug! prepare_tx with size %d (> %d)\n",
+ length, XMTU);
length = XMTU;
}
if (length >= MinTU) {
} else if (length > MTU) {
hard->offset[0] = 0;
hard->offset[1] = ofs = 512 - length - 3;
- } else
+ } else {
hard->offset[0] = ofs = 256 - length;
+ }
- BUGMSG(D_DURING, "prepare_tx: length=%d ofs=%d\n",
- length,ofs);
+ arc_printk(D_DURING, dev, "prepare_tx: length=%d ofs=%d\n",
+ length, ofs);
lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
lp->hw.copy_to_card(dev, bufnum, ofs, &pkt->soft, length);
return 1; /* done */
}
+
+static struct ArcProto rawmode_proto = {
+ .suffix = 'r',
+ .mtu = XMTU,
+ .rx = rx,
+ .build_header = build_header,
+ .prepare_tx = prepare_tx,
+ .continue_tx = NULL,
+ .ack_tx = NULL
+};
+
+static int __init arcnet_raw_init(void)
+{
+ int count;
+
+ pr_info("raw mode (`r') encapsulation support loaded\n");
+
+ for (count = 0; count < 256; count++)
+ if (arc_proto_map[count] == arc_proto_default)
+ arc_proto_map[count] = &rawmode_proto;
+
+ /* for raw mode, we only set the bcast proto if there's no better one */
+ if (arc_bcast_proto == arc_proto_default)
+ arc_bcast_proto = &rawmode_proto;
+
+ arc_proto_default = &rawmode_proto;
+ return 0;
+}
+
+static void __exit arcnet_raw_exit(void)
+{
+ arcnet_unregister_proto(&rawmode_proto);
+}
+
+module_init(arcnet_raw_init);
+module_exit(arcnet_raw_exit);
+
+MODULE_LICENSE("GPL");
projects / karo-tx-linux.git / blobdiff