firewire: net: style changes

Change names of types, variables, functions.
Omit debug code.
Use get_unaligned*, put_unaligned*.
Annotate big endian data.
Handle errors in __init.
Change whitespace.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

2 files changed, 966 insertions, 1077 deletions

diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index cdab32b2067..8c45e43da7c 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -430,7 +430,7 @@ void fw_card_initialize(struct fw_card *card,
 
 	INIT_DELAYED_WORK(&card->work, fw_card_bm_work);
 	card->netdev = NULL;
-	INIT_LIST_HEAD(&card->ipv4_nodes);
+	INIT_LIST_HEAD(&card->peer_list);
 }
 EXPORT_SYMBOL(fw_card_initialize);
 
diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c
index 15353886bd8..ba6f924b1b1 100644
--- a/drivers/firewire/net.c
+++ b/drivers/firewire/net.c
@@ -6,6 +6,7 @@
  * based on eth1394 by Ben Collins et al
  */
 
+#include <linux/bug.h>
 #include <linux/device.h>
 #include <linux/ethtool.h>
 #include <linux/firewire.h>
@@ -13,6 +14,7 @@
 #include <linux/highmem.h>
 #include <linux/in.h>
 #include <linux/ip.h>
+#include <linux/jiffies.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -22,181 +24,109 @@
 #include <asm/unaligned.h>
 #include <net/arp.h>
 
-/* Things to potentially make runtime cofigurable */
-/* must be at least as large as our maximum receive size */
-#define FIFO_SIZE 4096
-/* Network timeout in glibbles */
-#define IPV4_TIMEOUT       100000
+#define FWNET_MAX_FRAGMENTS	25	/* arbitrary limit */
+#define FWNET_ISO_PAGE_COUNT	(PAGE_SIZE < 16 * 1024 ? 4 : 2)
 
-/* Runitme configurable paramaters */
-static int ipv4_mpd = 25;
-static int ipv4_max_xmt = 0;
-/* 16k for receiving arp and broadcast packets.  Enough? */
-static int ipv4_iso_page_count = 4;
+#define IEEE1394_BROADCAST_CHANNEL	31
+#define IEEE1394_ALL_NODES		(0xffc0 | 0x003f)
+#define IEEE1394_MAX_PAYLOAD_S100	512
+#define FWNET_NO_FIFO_ADDR		(~0ULL)
 
-MODULE_AUTHOR("Jay Fenlason (fenlason@redhat.com)");
-MODULE_DESCRIPTION("Firewire IPv4 Driver (IPv4-over-IEEE1394 as per RFC 2734)");
-MODULE_LICENSE("GPL");
-MODULE_DEVICE_TABLE(ieee1394, ipv4_id_table);
-module_param_named(max_partial_datagrams, ipv4_mpd, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(max_partial_datagrams, "Maximum number of received"
- " incomplete fragmented datagrams (default = 25).");
-
-/* Max xmt is useful for forcing fragmentation, which makes testing easier. */
-module_param_named(max_transmit, ipv4_max_xmt, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(max_transmit, "Maximum datagram size to transmit"
- " (larger datagrams will be fragmented) (default = 0 (use hardware defaults).");
-
-/* iso page count controls how many pages will be used for receiving broadcast packets. */
-module_param_named(iso_pages, ipv4_iso_page_count, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(iso_pages, "Number of pages to use for receiving broadcast packets"
- " (default = 4).");
-
-/* uncomment this line to do debugging */
-#define fw_debug(s, args...) printk(KERN_DEBUG KBUILD_MODNAME ": " s, ## args)
-
-/* comment out these lines to do debugging. */
-/* #undef fw_debug */
-/* #define fw_debug(s...) */
-/* #define print_hex_dump(l...) */
-
-/* Define a fake hardware header format for the networking core.  Note that
- * header size cannot exceed 16 bytes as that is the size of the header cache.
- * Also, we do not need the source address in the header so we omit it and
- * keep the header to under 16 bytes */
-#define IPV4_ALEN (8)
-/* This must equal sizeof(struct ipv4_ether_hdr) */
-#define IPV4_HLEN (10)
-
-/* FIXME: what's a good size for this? */
-#define INVALID_FIFO_ADDR (u64)~0ULL
-
-/* Things specified by standards */
-#define BROADCAST_CHANNEL 31
-
-#define S100_BUFFER_SIZE 512
-#define MAX_BUFFER_SIZE 4096
-
-#define IPV4_GASP_SPECIFIER_ID	0x00005EU
-#define IPV4_GASP_VERSION	0x00000001U
-
-#define IPV4_GASP_OVERHEAD (2 * sizeof(u32)) /* for GASP header */
-
-#define IPV4_UNFRAG_HDR_SIZE	sizeof(u32)
-#define IPV4_FRAG_HDR_SIZE	(2 * sizeof(u32))
-#define IPV4_FRAG_OVERHEAD	sizeof(u32)
-
-#define ALL_NODES (0xffc0 | 0x003f)
-
-#define IPV4_HDR_UNFRAG		0	/* unfragmented		*/
-#define IPV4_HDR_FIRSTFRAG	1	/* first fragment	*/
-#define IPV4_HDR_LASTFRAG	2	/* last fragment	*/
-#define IPV4_HDR_INTFRAG	3	/* interior fragment	*/
-
-/* Our arp packet (ARPHRD_IEEE1394) */
-/* FIXME: note that this is probably bogus on weird-endian machines */
-struct ipv4_arp {
-	u16 hw_type;		/* 0x0018	*/
-	u16 proto_type;		/* 0x0806       */
-	u8 hw_addr_len;		/* 16		*/
-	u8 ip_addr_len;         /* 4		*/
-	u16 opcode;	        /* ARP Opcode	*/
-	/* Above is exactly the same format as struct arphdr */
-
-	u64 s_uniq_id;		/* Sender's 64bit EUI			*/
-	u8 max_rec;             /* Sender's max packet size		*/
-	u8 sspd;		/* Sender's max speed			*/
-	u16 fifo_hi;            /* hi 16bits of sender's FIFO addr	*/
-	u32 fifo_lo;            /* lo 32bits of sender's FIFO addr	*/
-	u32 sip;		/* Sender's IP Address			*/
-	u32 tip;		/* IP Address of requested hw addr	*/
-} __attribute__((packed));
+#define IANA_SPECIFIER_ID		0x00005eU
+#define RFC2734_SW_VERSION		0x000001U
 
-struct ipv4_ether_hdr {
-	unsigned char	h_dest[IPV4_ALEN];	/* destination address */
-	unsigned short  h_proto;                /* packet type ID field */
-}  __attribute__((packed));
+#define IEEE1394_GASP_HDR_SIZE	8
 
-static inline struct ipv4_ether_hdr *ipv4_ether_hdr(const struct sk_buff *skb)
-{
-	return (struct ipv4_ether_hdr *)skb_mac_header(skb);
-}
+#define RFC2374_UNFRAG_HDR_SIZE	4
+#define RFC2374_FRAG_HDR_SIZE	8
+#define RFC2374_FRAG_OVERHEAD	4
 
-enum ipv4_tx_type {
-	IPV4_UNKNOWN = 0,
-	IPV4_GASP = 1,
-	IPV4_WRREQ = 2,
-};
+#define RFC2374_HDR_UNFRAG	0	/* unfragmented		*/
+#define RFC2374_HDR_FIRSTFRAG	1	/* first fragment	*/
+#define RFC2374_HDR_LASTFRAG	2	/* last fragment	*/
+#define RFC2374_HDR_INTFRAG	3	/* interior fragment	*/
 
-enum ipv4_broadcast_state {
-	IPV4_BROADCAST_ERROR,
-	IPV4_BROADCAST_RUNNING,
-	IPV4_BROADCAST_STOPPED,
-};
+#define RFC2734_HW_ADDR_LEN	16
 
-#define ipv4_get_hdr_lf(h)		(((h)->w0&0xC0000000)>>30)
-#define ipv4_get_hdr_ether_type(h)	(((h)->w0&0x0000FFFF)    )
-#define ipv4_get_hdr_dg_size(h)		(((h)->w0&0x0FFF0000)>>16)
-#define ipv4_get_hdr_fg_off(h)		(((h)->w0&0x00000FFF)    )
-#define ipv4_get_hdr_dgl(h)		(((h)->w1&0xFFFF0000)>>16)
+struct rfc2734_arp {
+	__be16 hw_type;		/* 0x0018	*/
+	__be16 proto_type;	/* 0x0806       */
+	u8 hw_addr_len;		/* 16		*/
+	u8 ip_addr_len;		/* 4		*/
+	__be16 opcode;		/* ARP Opcode	*/
+	/* Above is exactly the same format as struct arphdr */
 
-#define ipv4_set_hdr_lf(lf)		(( lf)<<30)
-#define ipv4_set_hdr_ether_type(et)	(( et)    )
-#define ipv4_set_hdr_dg_size(dgs)	((dgs)<<16)
-#define ipv4_set_hdr_fg_off(fgo)	((fgo)    )
+	__be64 s_uniq_id;	/* Sender's 64bit EUI			*/
+	u8 max_rec;		/* Sender's max packet size		*/
+	u8 sspd;		/* Sender's max speed			*/
+	__be16 fifo_hi;		/* hi 16bits of sender's FIFO addr	*/
+	__be32 fifo_lo;		/* lo 32bits of sender's FIFO addr	*/
+	__be32 sip;		/* Sender's IP Address			*/
+	__be32 tip;		/* IP Address of requested hw addr	*/
+} __attribute__((packed));
 
-#define ipv4_set_hdr_dgl(dgl)		((dgl)<<16)
+/* This header format is specific to this driver implementation. */
+#define FWNET_ALEN	8
+#define FWNET_HLEN	10
+struct fwnet_header {
+	u8 h_dest[FWNET_ALEN];	/* destination address */
+	__be16 h_proto;		/* packet type ID field */
+} __attribute__((packed));
 
-struct ipv4_hdr {
+/* IPv4 and IPv6 encapsulation header */
+struct rfc2734_header {
 	u32 w0;
 	u32 w1;
 };
 
-static inline void ipv4_make_uf_hdr( struct ipv4_hdr *hdr, unsigned ether_type) {
-	hdr->w0 = ipv4_set_hdr_lf(IPV4_HDR_UNFRAG)
-		   |ipv4_set_hdr_ether_type(ether_type);
-	fw_debug ( "Setting unfragmented header %p to %x\n", hdr, hdr->w0 );
-}
+#define fwnet_get_hdr_lf(h)		(((h)->w0 & 0xc0000000) >> 30)
+#define fwnet_get_hdr_ether_type(h)	(((h)->w0 & 0x0000ffff))
+#define fwnet_get_hdr_dg_size(h)	(((h)->w0 & 0x0fff0000) >> 16)
+#define fwnet_get_hdr_fg_off(h)		(((h)->w0 & 0x00000fff))
+#define fwnet_get_hdr_dgl(h)		(((h)->w1 & 0xffff0000) >> 16)
 
-static inline void ipv4_make_ff_hdr ( struct ipv4_hdr *hdr, unsigned ether_type, unsigned dg_size, unsigned dgl ) {
-	hdr->w0 = ipv4_set_hdr_lf(IPV4_HDR_FIRSTFRAG)
-		   |ipv4_set_hdr_dg_size(dg_size)
-		   |ipv4_set_hdr_ether_type(ether_type);
-	hdr->w1 = ipv4_set_hdr_dgl(dgl);
-	fw_debug ( "Setting fragmented header %p to first_frag %x,%x (et %x, dgs %x, dgl %x)\n", hdr, hdr->w0, hdr->w1,
- ether_type, dg_size, dgl );
-}
+#define fwnet_set_hdr_lf(lf)		((lf)  << 30)
+#define fwnet_set_hdr_ether_type(et)	(et)
+#define fwnet_set_hdr_dg_size(dgs)	((dgs) << 16)
+#define fwnet_set_hdr_fg_off(fgo)	(fgo)
 
-static inline void ipv4_make_sf_hdr ( struct ipv4_hdr *hdr, unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) {
-	hdr->w0 = ipv4_set_hdr_lf(lf)
-		 |ipv4_set_hdr_dg_size(dg_size)
-		 |ipv4_set_hdr_fg_off(fg_off);
-	hdr->w1 = ipv4_set_hdr_dgl(dgl);
-	fw_debug ( "Setting fragmented header %p to %x,%x (lf %x, dgs %x, fo %x dgl %x)\n",
- hdr, hdr->w0, hdr->w1,
- lf, dg_size, fg_off, dgl );
-}
+#define fwnet_set_hdr_dgl(dgl)		((dgl) << 16)
 
-/* End of IP1394 headers */
+static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr,
+		unsigned ether_type)
+{
+	hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG)
+		  | fwnet_set_hdr_ether_type(ether_type);
+}
 
-/* Fragment types */
-#define ETH1394_HDR_LF_UF	0	/* unfragmented		*/
-#define ETH1394_HDR_LF_FF	1	/* first fragment	*/
-#define ETH1394_HDR_LF_LF	2	/* last fragment	*/
-#define ETH1394_HDR_LF_IF	3	/* interior fragment	*/
+static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr,
+		unsigned ether_type, unsigned dg_size, unsigned dgl)
+{
+	hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG)
+		  | fwnet_set_hdr_dg_size(dg_size)
+		  | fwnet_set_hdr_ether_type(ether_type);
+	hdr->w1 = fwnet_set_hdr_dgl(dgl);
+}
 
-#define IP1394_HW_ADDR_LEN	16	/* As per RFC		*/
+static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr,
+		unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl)
+{
+	hdr->w0 = fwnet_set_hdr_lf(lf)
+		  | fwnet_set_hdr_dg_size(dg_size)
+		  | fwnet_set_hdr_fg_off(fg_off);
+	hdr->w1 = fwnet_set_hdr_dgl(dgl);
+}
 
 /* This list keeps track of what parts of the datagram have been filled in */
-struct ipv4_fragment_info {
-        struct list_head fragment_info;
+struct fwnet_fragment_info {
+	struct list_head fi_link;
 	u16 offset;
 	u16 len;
 };
 
-struct ipv4_partial_datagram {
-	struct list_head pdg_list;
-	struct list_head fragment_info;
+struct fwnet_partial_datagram {
+	struct list_head pd_link;
+	struct list_head fi_list;
 	struct sk_buff *skb;
 	/* FIXME Why not use skb->data? */
 	char *pbuf;
@@ -208,40 +138,43 @@ struct ipv4_partial_datagram {
 /*
  * We keep one of these for each IPv4 capable device attached to a fw_card.
  * The list of them is stored in the fw_card structure rather than in the
- * ipv4_priv because the remote IPv4 nodes may be probed before the card is,
- * so we need a place to store them before the ipv4_priv structure is
+ * fwnet_device because the remote IPv4 nodes may be probed before the card is,
+ * so we need a place to store them before the fwnet_device structure is
  * allocated.
  */
-struct ipv4_node {
-	struct list_head ipv4_nodes;
-	/* guid of the remote node */
+struct fwnet_peer {
+	struct list_head peer_link;
+	/* guid of the remote peer */
 	u64 guid;
-	/* FIFO address to transmit datagrams to, or INVALID_FIFO_ADDR */
+	/* FIFO address to transmit datagrams to, or FWNET_NO_FIFO_ADDR */
 	u64 fifo;
 
 	spinlock_t pdg_lock;	/* partial datagram lock		*/
-	/* List of partial datagrams received from this node */
-	struct list_head pdg_list;
-	/* Number of entries in pdg_list at the moment */
+	/* List of partial datagrams received from this peer */
+	struct list_head pd_list;
+	/* Number of entries in pd_list at the moment */
 	unsigned pdg_size;
 
-	/* max payload to transmit to this remote node */
-	/* This already includes the IPV4_FRAG_HDR_SIZE overhead */
+	/* max payload to transmit to this remote peer */
+	/* This already includes the RFC2374_FRAG_HDR_SIZE overhead */
 	u16 max_payload;
 	/* outgoing datagram label */
 	u16 datagram_label;
-	/* Current node_id of the remote node */
-	u16 nodeid;
-	/* current generation of the remote node */
+	/* Current node_id of the remote peer */
+	u16 node_id;
+	/* current generation of the remote peer */
 	u8 generation;
-	/* max speed that this node can receive at */
+	/* max speed that this peer can receive at */
 	u8 xmt_speed;
 };
 
-struct ipv4_priv {
+struct fwnet_device {
 	spinlock_t lock;
-
-	enum ipv4_broadcast_state broadcast_state;
+	enum {
+		FWNET_BROADCAST_ERROR,
+		FWNET_BROADCAST_RUNNING,
+		FWNET_BROADCAST_STOPPED,
+	} broadcast_state;
 	struct fw_iso_context *broadcast_rcv_context;
 	struct fw_iso_buffer broadcast_rcv_buffer;
 	void **broadcast_rcv_buffer_ptrs;
@@ -257,14 +190,12 @@ struct ipv4_priv {
 	u16 broadcast_xmt_datagramlabel;
 
 	/*
-	 * The csr address that remote nodes must send datagrams to for us to
+	 * The CSR address that remote nodes must send datagrams to for us to
 	 * receive them.
 	 */
 	struct fw_address_handler handler;
 	u64 local_fifo;
 
-	/* Wake up to xmt	 */
-        /* struct work_struct wake;*/
 	/* List of packets to be sent */
 	struct list_head packet_list;
 	/*
@@ -279,17 +210,17 @@ struct ipv4_priv {
 };
 
 /* This is our task struct. It's used for the packet complete callback.  */
-struct ipv4_packet_task {
+struct fwnet_packet_task {
 	/*
-	 * ptask can actually be on priv->packet_list, priv->broadcasted_list,
-	 * or priv->sent_list depending on its current state.
+	 * ptask can actually be on dev->packet_list, dev->broadcasted_list,
+	 * or dev->sent_list depending on its current state.
 	 */
-	struct list_head packet_list;
+	struct list_head pt_link;
 	struct fw_transaction transaction;
-	struct ipv4_hdr hdr;
+	struct rfc2734_header hdr;
 	struct sk_buff *skb;
-	struct ipv4_priv *priv;
-	enum ipv4_tx_type tx_type;
+	struct fwnet_device *dev;
+
 	int outstanding_pkts;
 	unsigned max_payload;
 	u64 fifo_addr;
@@ -298,243 +229,192 @@ struct ipv4_packet_task {
 	u8 speed;
 };
 
-static struct kmem_cache *ipv4_packet_task_cache;
-
-static const char ipv4_driver_name[] = "firewire-ipv4";
-
-static const struct ieee1394_device_id ipv4_id_table[] = {
-	{
-		.match_flags  = IEEE1394_MATCH_SPECIFIER_ID |
-				IEEE1394_MATCH_VERSION,
-		.specifier_id = IPV4_GASP_SPECIFIER_ID,
-		.version      = IPV4_GASP_VERSION,
-	},
-	{ }
-};
-
-static u32 ipv4_unit_directory_data[] = {
-	0x00040000,					/* unit directory */
-	0x12000000 | IPV4_GASP_SPECIFIER_ID,	/* specifier ID */
-	0x81000003,					/* text descriptor */
-	0x13000000 | IPV4_GASP_VERSION,		/* version */
-	0x81000005,					/* text descriptor */
-
-	0x00030000,					/* Three quadlets */
-	0x00000000,					/* Text */
-	0x00000000,					/* Language 0 */
-	0x49414e41,					/* I A N A */
-	0x00030000,					/* Three quadlets */
-	0x00000000,					/* Text */
-	0x00000000,					/* Language 0 */
-	0x49507634,					/* I P v 4 */
-};
-
-static struct fw_descriptor ipv4_unit_directory = {
-	.length = ARRAY_SIZE(ipv4_unit_directory_data),
-	.key = 0xd1000000,
-	.data = ipv4_unit_directory_data
-};
-
-static int ipv4_send_packet(struct ipv4_packet_task *ptask );
-
-/* ------------------------------------------------------------------ */
-/******************************************
- * HW Header net device functions
- ******************************************/
-  /* These functions have been adapted from net/ethernet/eth.c */
-
-/* Create a fake MAC header for an arbitrary protocol layer.
- * saddr=NULL means use device source address
- * daddr=NULL means leave destination address (eg unresolved arp). */
+/*
+ * saddr == NULL means use device source address.
+ * daddr == NULL means leave destination address (eg unresolved arp).
+ */
+static int fwnet_header_create(struct sk_buff *skb, struct net_device *net,
+			unsigned short type, const void *daddr,
+			const void *saddr, unsigned len)
+{
+	struct fwnet_header *h;
 
-static int ipv4_header ( struct sk_buff *skb, struct net_device *dev,
-		       unsigned short type, const void *daddr,
-		       const void *saddr, unsigned len) {
-	struct ipv4_ether_hdr *eth;
+	h = (struct fwnet_header *)skb_push(skb, sizeof(*h));
+	put_unaligned_be16(type, &h->h_proto);
 
-	eth = (struct ipv4_ether_hdr *)skb_push(skb, sizeof(*eth));
-	eth->h_proto = htons(type);
+	if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) {
+		memset(h->h_dest, 0, net->addr_len);
 
-	if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
-		memset(eth->h_dest, 0, dev->addr_len);
-		return dev->hard_header_len;
+		return net->hard_header_len;
 	}
 
 	if (daddr) {
-		memcpy(eth->h_dest, daddr, dev->addr_len);
-		return dev->hard_header_len;
+		memcpy(h->h_dest, daddr, net->addr_len);
+
+		return net->hard_header_len;
 	}
 
-	return -dev->hard_header_len;
+	return -net->hard_header_len;
 }
 
-/* Rebuild the faked MAC header. This is called after an ARP
- * (or in future other address resolution) has completed on this
- * sk_buff. We now let ARP fill in the other fields.
- *
- * This routine CANNOT use cached dst->neigh!
- * Really, it is used only when dst->neigh is wrong.
- */
-
-static int ipv4_rebuild_header(struct sk_buff *skb)
+static int fwnet_header_rebuild(struct sk_buff *skb)
 {
-	struct ipv4_ether_hdr *eth;
+	struct fwnet_header *h = (struct fwnet_header *)skb->data;
 
-	eth = (struct ipv4_ether_hdr *)skb->data;
-	if (eth->h_proto == htons(ETH_P_IP))
-		return arp_find((unsigned char *)&eth->h_dest, skb);
+	if (get_unaligned_be16(&h->h_proto) == ETH_P_IP)
+		return arp_find((unsigned char *)&h->h_dest, skb);
 
-	fw_notify ( "%s: unable to resolve type %04x addresses\n",
-		   skb->dev->name,ntohs(eth->h_proto) );
+	fw_notify("%s: unable to resolve type %04x addresses\n",
+		  skb->dev->name, be16_to_cpu(h->h_proto));
 	return 0;
 }
 
-static int ipv4_header_cache(const struct neighbour *neigh, struct hh_cache *hh) {
-	unsigned short type = hh->hh_type;
-	struct net_device *dev;
-	struct ipv4_ether_hdr *eth;
+static int fwnet_header_cache(const struct neighbour *neigh,
+			      struct hh_cache *hh)
+{
+	struct net_device *net;
+	struct fwnet_header *h;
 
-	if (type == htons(ETH_P_802_3))
+	if (hh->hh_type == cpu_to_be16(ETH_P_802_3))
 		return -1;
-	dev = neigh->dev;
-	eth = (struct ipv4_ether_hdr *)((u8 *)hh->hh_data + 16 - sizeof(*eth));
-	eth->h_proto = type;
-	memcpy(eth->h_dest, neigh->ha, dev->addr_len);
+	net = neigh->dev;
+	h = (struct fwnet_header *)((u8 *)hh->hh_data + 16 - sizeof(*h));
+	h->h_proto = hh->hh_type;
+	memcpy(h->h_dest, neigh->ha, net->addr_len);
+	hh->hh_len = FWNET_HLEN;
 
-	hh->hh_len = IPV4_HLEN;
 	return 0;
 }
 
 /* Called by Address Resolution module to notify changes in address. */
-static void ipv4_header_cache_update(struct hh_cache *hh, const struct net_device *dev, const unsigned char * haddr ) {
-	memcpy((u8 *)hh->hh_data + 16 - IPV4_HLEN, haddr, dev->addr_len);
+static void fwnet_header_cache_update(struct hh_cache *hh,
+		const struct net_device *net, const unsigned char *haddr)
+{
+	memcpy((u8 *)hh->hh_data + 16 - FWNET_HLEN, haddr, net->addr_len);
 }
 
-static int ipv4_header_parse(const struct sk_buff *skb, unsigned char *haddr) {
-	memcpy(haddr, skb->dev->dev_addr, IPV4_ALEN);
-	return IPV4_ALEN;
+static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr)
+{
+	memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN);
+
+	return FWNET_ALEN;
 }
 
-static const struct header_ops ipv4_header_ops = {
-	.create         = ipv4_header,
-	.rebuild        = ipv4_rebuild_header,
-	.cache		= ipv4_header_cache,
-	.cache_update	= ipv4_header_cache_update,
-	.parse          = ipv4_header_parse,
+static const struct header_ops fwnet_header_ops = {
+	.create         = fwnet_header_create,
+	.rebuild        = fwnet_header_rebuild,
+	.cache		= fwnet_header_cache,
+	.cache_update	= fwnet_header_cache_update,
+	.parse          = fwnet_header_parse,
 };
 
-/* ------------------------------------------------------------------ */
-
 /* FIXME: is this correct for all cases? */
-static bool ipv4_frag_overlap(struct ipv4_partial_datagram *pd, unsigned offset, unsigned len)
+static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd,
+			       unsigned offset, unsigned len)
 {
-        struct ipv4_fragment_info *fi;
+	struct fwnet_fragment_info *fi;
 	unsigned end = offset + len;
 
-	list_for_each_entry(fi, &pd->fragment_info, fragment_info) {
-		if (offset < fi->offset + fi->len && end > fi->offset) {
-			fw_debug ( "frag_overlap pd %p fi %p (%x@%x) with %x@%x\n", pd, fi, fi->len, fi->offset, len, offset );
+	list_for_each_entry(fi, &pd->fi_list, fi_link)
+		if (offset < fi->offset + fi->len && end > fi->offset)
 			return true;
-		}
-	}
-	fw_debug ( "frag_overlap %p does not overlap with %x@%x\n", pd, len, offset );
+
 	return false;
 }
 
 /* Assumes that new fragment does not overlap any existing fragments */
-static struct ipv4_fragment_info *ipv4_frag_new ( struct ipv4_partial_datagram *pd, unsigned offset, unsigned len ) {
-	struct ipv4_fragment_info *fi, *fi2, *new;
+static struct fwnet_fragment_info *fwnet_frag_new(
+	struct fwnet_partial_datagram *pd, unsigned offset, unsigned len)
+{
+	struct fwnet_fragment_info *fi, *fi2, *new;
 	struct list_head *list;
 
-	fw_debug ( "frag_new pd %p %x@%x\n", pd, len, offset );
-	list = &pd->fragment_info;
-	list_for_each_entry(fi, &pd->fragment_info, fragment_info) {
+	list = &pd->fi_list;
+	list_for_each_entry(fi, &pd->fi_list, fi_link) {
 		if (fi->offset + fi->len == offset) {
 			/* The new fragment can be tacked on to the end */
 			/* Did the new fragment plug a hole? */
-			fi2 = list_entry(fi->fragment_info.next, struct ipv4_fragment_info, fragment_info);
+			fi2 = list_entry(fi->fi_link.next,
+					 struct fwnet_fragment_info, fi_link);
 			if (fi->offset + fi->len == fi2->offset) {
-				fw_debug ( "pd %p: hole filling %p (%x@%x) and %p(%x@%x): now %x@%x\n", pd, fi, fi->len, fi->offset,
-				fi2, fi2->len, fi2->offset, fi->len + len + fi2->len, fi->offset );
 				/* glue fragments together */
 				fi->len += len + fi2->len;
-				list_del(&fi2->fragment_info);
+				list_del(&fi2->fi_link);
 				kfree(fi2);
 			} else {
-				fw_debug ( "pd %p: extending %p from %x@%x to %x@%x\n", pd, fi, fi->len, fi->offset, fi->len+len, fi->offset );
 				fi->len += len;
 			}
+
 			return fi;
 		}
 		if (offset + len == fi->offset) {
 			/* The new fragment can be tacked on to the beginning */
 			/* Did the new fragment plug a hole? */
-			fi2 = list_entry(fi->fragment_info.prev, struct ipv4_fragment_info, fragment_info);
+			fi2 = list_entry(fi->fi_link.prev,
+					 struct fwnet_fragment_info, fi_link);
 			if (fi2->offset + fi2->len == fi->offset) {
 				/* glue fragments together */
-				fw_debug ( "pd %p: extending %p and merging with %p from %x@%x to %x@%x\n",
- pd, fi2, fi, fi2->len, fi2->offset, fi2->len + fi->len + len, fi2->offset );
 				fi2->len += fi->len + len;
-				list_del(&fi->fragment_info);
+				list_del(&fi->fi_link);
 				kfree(fi);
+
 				return fi2;
 			}
-			fw_debug ( "pd %p: extending %p from %x@%x to %x@%x\n", pd, fi, fi->len, fi->offset, offset, fi->len + len );
 			fi->offset = offset;
 			fi->len += len;
+
 			return fi;
 		}
 		if (offset > fi->offset + fi->len) {
-			list = &fi->fragment_info;
+			list = &fi->fi_link;
 			break;
 		}
 		if (offset + len < fi->offset) {
-			list = fi->fragment_info.prev;
+			list = fi->fi_link.prev;
 			break;
 		}
 	}
 
 	new = kmalloc(sizeof(*new), GFP_ATOMIC);
 	if (!new) {
-		fw_error ( "out of memory in fragment handling!\n" );
+		fw_error("out of memory\n");
 		return NULL;
 	}
 
 	new->offset = offset;
 	new->len = len;
-	list_add(&new->fragment_info, list);
-	fw_debug ( "pd %p: new frag %p %x@%x\n", pd, new, new->len, new->offset );
-	list_for_each_entry( fi, &pd->fragment_info, fragment_info )
-		fw_debug ( "fi %p %x@%x\n", fi, fi->len, fi->offset );
+	list_add(&new->fi_link, list);
+
 	return new;
 }
 
-/* ------------------------------------------------------------------ */
-
-static struct ipv4_partial_datagram *ipv4_pd_new(struct net_device *netdev,
- struct ipv4_node *node, u16 datagram_label, unsigned dg_size, u32 *frag_buf,
- unsigned frag_off, unsigned frag_len) {
-	struct ipv4_partial_datagram *new;
-	struct ipv4_fragment_info *fi;
+static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net,
+		struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size,
+		void *frag_buf, unsigned frag_off, unsigned frag_len)
+{
+	struct fwnet_partial_datagram *new;
+	struct fwnet_fragment_info *fi;
 
 	new = kmalloc(sizeof(*new), GFP_ATOMIC);
 	if (!new)
 		goto fail;
-	INIT_LIST_HEAD(&new->fragment_info);
-	fi = ipv4_frag_new ( new, frag_off, frag_len);
-	if ( fi == NULL )
+
+	INIT_LIST_HEAD(&new->fi_list);
+	fi = fwnet_frag_new(new, frag_off, frag_len);
+	if (fi == NULL)
 		goto fail_w_new;
+
 	new->datagram_label = datagram_label;
 	new->datagram_size = dg_size;
-	new->skb = dev_alloc_skb(dg_size + netdev->hard_header_len + 15);
-	if ( new->skb == NULL )
+	new->skb = dev_alloc_skb(dg_size + net->hard_header_len + 15);
+	if (new->skb == NULL)
 		goto fail_w_fi;
-	skb_reserve(new->skb, (netdev->hard_header_len + 15) & ~15);
+
+	skb_reserve(new->skb, (net->hard_header_len + 15) & ~15);
 	new->pbuf = skb_put(new->skb, dg_size);
 	memcpy(new->pbuf + frag_off, frag_buf, frag_len);
-	list_add_tail(&new->pdg_list, &node->pdg_list);
-	fw_debug ( "pd_new: new pd %p { dgl %u, dg_size %u, skb %p, pbuf %p } on node %p\n",
- new, new->datagram_label, new->datagram_size, new->skb, new->pbuf, node );
+	list_add_tail(&new->pd_link, &peer->pd_list);
+
 	return new;
 
 fail_w_fi:
@@ -542,174 +422,171 @@ fail_w_fi:
 fail_w_new:
 	kfree(new);
 fail:
-	fw_error("ipv4_pd_new: no memory\n");
+	fw_error("out of memory\n");
+
 	return NULL;
 }
 
-static struct ipv4_partial_datagram *ipv4_pd_find(struct ipv4_node *node, u16 datagram_label) {
-	struct ipv4_partial_datagram *pd;
+static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer,
+						    u16 datagram_label)
+{
+	struct fwnet_partial_datagram *pd;
 
-	list_for_each_entry(pd, &node->pdg_list, pdg_list) {
-	        if ( pd->datagram_label == datagram_label ) {
-			fw_debug ( "pd_find(node %p, label %u): pd %p\n", node, datagram_label, pd );
+	list_for_each_entry(pd, &peer->pd_list, pd_link)
+		if (pd->datagram_label == datagram_label)
 			return pd;
-		}
-	}
-	fw_debug ( "pd_find(node %p, label %u) no entry\n", node, datagram_label );
+
 	return NULL;
 }
 
 
-static void ipv4_pd_delete ( struct ipv4_partial_datagram *old ) {
-	struct ipv4_fragment_info *fi, *n;
+static void fwnet_pd_delete(struct fwnet_partial_datagram *old)
+{
+	struct fwnet_fragment_info *fi, *n;
 
-	fw_debug ( "pd_delete %p\n", old );
-	list_for_each_entry_safe(fi, n, &old->fragment_info, fragment_info) {
-		fw_debug ( "Freeing fi %p\n", fi );
+	list_for_each_entry_safe(fi, n, &old->fi_list, fi_link)
 		kfree(fi);
-	}
-	list_del(&old->pdg_list);
+
+	list_del(&old->pd_link);
 	dev_kfree_skb_any(old->skb);
 	kfree(old);
 }
 
-static bool ipv4_pd_update ( struct ipv4_node *node, struct ipv4_partial_datagram *pd,
- u32 *frag_buf, unsigned frag_off, unsigned frag_len) {
-	fw_debug ( "pd_update node %p, pd %p, frag_buf %p, %x@%x\n", node, pd, frag_buf, frag_len, frag_off );
-	if ( ipv4_frag_new ( pd, frag_off, frag_len ) == NULL)
+static bool fwnet_pd_update(struct fwnet_peer *peer,
+		struct fwnet_partial_datagram *pd, void *frag_buf,
+		unsigned frag_off, unsigned frag_len)
+{
+	if (fwnet_frag_new(pd, frag_off, frag_len) == NULL)
 		return false;
+
 	memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
 
 	/*
 	 * Move list entry to beginnig of list so that oldest partial
 	 * datagrams percolate to the end of the list
 	 */
-	list_move_tail(&pd->pdg_list, &node->pdg_list);
-	fw_debug ( "New pd list:\n" );
-	list_for_each_entry ( pd, &node->pdg_list, pdg_list ) {
-		fw_debug ( "pd %p\n", pd );
-	}
+	list_move_tail(&pd->pd_link, &peer->pd_list);
+
 	return true;
 }
 
-static bool ipv4_pd_is_complete ( struct ipv4_partial_datagram *pd ) {
-	struct ipv4_fragment_info *fi;
-	bool ret;
+static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd)
+{
+	struct fwnet_fragment_info *fi;
 
-	fi = list_entry(pd->fragment_info.next, struct ipv4_fragment_info, fragment_info);
+	fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link);
 
-	ret = (fi->len == pd->datagram_size);
-	fw_debug ( "pd_is_complete (pd %p, dgs %x): fi %p (%x@%x) %s\n", pd, pd->datagram_size, fi, fi->len, fi->offset, ret ? "yes" : "no" );
-	return ret;
+	return fi->len == pd->datagram_size;
 }
 
-/* ------------------------------------------------------------------ */
+static int fwnet_peer_new(struct fw_card *card, struct fw_device *device)
+{
+	struct fwnet_peer *peer;
 
-static int ipv4_node_new ( struct fw_card *card, struct fw_device *device ) {
-	struct ipv4_node *node;
+	peer = kmalloc(sizeof(*peer), GFP_KERNEL);
+	if (!peer) {
+		fw_error("out of memory\n");
 
-	node = kmalloc ( sizeof(*node), GFP_KERNEL );
-	if ( ! node ) {
-		fw_error ( "allocate new node failed\n" );
 		return -ENOMEM;
 	}
-	node->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
-	node->fifo = INVALID_FIFO_ADDR;
-	INIT_LIST_HEAD(&node->pdg_list);
-	spin_lock_init(&node->pdg_lock);
-	node->pdg_size = 0;
-	node->generation = device->generation;
+	peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
+	peer->fifo = FWNET_NO_FIFO_ADDR;
+	INIT_LIST_HEAD(&peer->pd_list);
+	spin_lock_init(&peer->pdg_lock);
+	peer->pdg_size = 0;
+	peer->generation = device->generation;
 	rmb();
-	node->nodeid = device->node_id;
+	peer->node_id = device->node_id;
 	 /* FIXME what should it really be? */
-	node->max_payload = S100_BUFFER_SIZE - IPV4_UNFRAG_HDR_SIZE;
-	node->datagram_label = 0U;
-	node->xmt_speed = device->max_speed;
-	list_add_tail ( &node->ipv4_nodes, &card->ipv4_nodes );
-	fw_debug ( "node_new: %p { guid %016llx, generation %u, nodeid %x, max_payload %x, xmt_speed %x } added\n",
- node, (unsigned long long)node->guid, node->generation, node->nodeid, node->max_payload, node->xmt_speed );
+	peer->max_payload = IEEE1394_MAX_PAYLOAD_S100 - RFC2374_UNFRAG_HDR_SIZE;
+	peer->datagram_label = 0U;
+	peer->xmt_speed = device->max_speed;
+	list_add_tail(&peer->peer_link, &card->peer_list);
+
 	return 0;
 }
 
-static struct ipv4_node *ipv4_node_find_by_guid(struct ipv4_priv *priv, u64 guid) {
-	struct ipv4_node *node;
+/* FIXME caller must take the lock, or peer needs to be reference-counted */
+static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev,
+						  u64 guid)
+{
+	struct fwnet_peer *p, *peer = NULL;
 	unsigned long flags;
 
-	spin_lock_irqsave(&priv->lock, flags);
-	list_for_each_entry(node, &priv->card->ipv4_nodes, ipv4_nodes)
-		if (node->guid == guid) {
-			/* FIXME: lock the node first? */
-			spin_unlock_irqrestore ( &priv->lock, flags );
-			fw_debug ( "node_find_by_guid (%016llx) found %p\n", (unsigned long long)guid, node );
-			return node;
+	spin_lock_irqsave(&dev->lock, flags);
+	list_for_each_entry(p, &dev->card->peer_list, peer_link)
+		if (p->guid == guid) {
+			peer = p;
+			break;
 		}
+	spin_unlock_irqrestore(&dev->lock, flags);
 
-	spin_unlock_irqrestore ( &priv->lock, flags );
-	fw_debug ( "node_find_by_guid (%016llx) not found\n", (unsigned long long)guid );
-	return NULL;
+	return peer;
 }
 
-static struct ipv4_node *ipv4_node_find_by_nodeid(struct ipv4_priv *priv, u16 nodeid) {
-	struct ipv4_node *node;
+/* FIXME caller must take the lock, or peer needs to be reference-counted */
+/* FIXME node_id doesn't mean anything without generation */
+static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev,
+						     u16 node_id)
+{
+	struct fwnet_peer *p, *peer = NULL;
 	unsigned long flags;
 
-	spin_lock_irqsave(&priv->lock, flags);
-	list_for_each_entry(node, &priv->card->ipv4_nodes, ipv4_nodes)
-		if (node->nodeid == nodeid) {
-			/* FIXME: lock the node first? */
-			spin_unlock_irqrestore ( &priv->lock, flags );
-			fw_debug ( "node_find_by_nodeid (%x) found %p\n", nodeid, node );
-			return node;
+	spin_lock_irqsave(&dev->lock, flags);
+	list_for_each_entry(p, &dev->card->peer_list, peer_link)
+		if (p->node_id == node_id) {
+			peer = p;
+			break;
 		}
-	fw_debug ( "node_find_by_nodeid (%x) not found\n", nodeid );
-	spin_unlock_irqrestore ( &priv->lock, flags );
-	return NULL;
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return peer;
 }
 
-/* This is only complicated because we can't assume priv exists */
-static void ipv4_node_delete ( struct fw_card *card, struct fw_device *device ) {
-	struct net_device *netdev;
-	struct ipv4_priv *priv;
-	struct ipv4_node *node;
+/* FIXME */
+static void fwnet_peer_delete(struct fw_card *card, struct fw_device *device)
+{
+	struct net_device *net;
+	struct fwnet_device *dev;
+	struct fwnet_peer *peer;
 	u64 guid;
 	unsigned long flags;
-	struct ipv4_partial_datagram *pd, *pd_next;
+	struct fwnet_partial_datagram *pd, *pd_next;
 
 	guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
-	netdev = card->netdev;
-	if ( netdev )
-		priv = netdev_priv ( netdev );
+	net = card->netdev;
+	if (net)
+		dev = netdev_priv(net);
 	else
-		priv = NULL;
-	if ( priv )
-		spin_lock_irqsave ( &priv->lock, flags );
-	list_for_each_entry( node, &card->ipv4_nodes, ipv4_nodes ) {
-		if ( node->guid == guid ) {
-			list_del ( &node->ipv4_nodes );
-			list_for_each_entry_safe( pd, pd_next, &node->pdg_list, pdg_list )
-				ipv4_pd_delete ( pd );
+		dev = NULL;
+	if (dev)
+		spin_lock_irqsave(&dev->lock, flags);
+
+	list_for_each_entry(peer, &card->peer_list, peer_link) {
+		if (peer->guid == guid) {
+			list_del(&peer->peer_link);
+			list_for_each_entry_safe(pd, pd_next, &peer->pd_list,
+						 pd_link)
+				fwnet_pd_delete(pd);
 			break;
 		}
 	}
-	if ( priv )
-		spin_unlock_irqrestore ( &priv->lock, flags );
+	if (dev)
+		spin_unlock_irqrestore(&dev->lock, flags);
 }
 
-/* ------------------------------------------------------------------ */
-
-
-static int ipv4_finish_incoming_packet ( struct net_device *netdev,
- struct sk_buff *skb, u16 source_node_id, bool is_broadcast, u16 ether_type ) {
-	struct ipv4_priv *priv;
-	static u64 broadcast_hw = ~0ULL;
+static int fwnet_finish_incoming_packet(struct net_device *net,
+					struct sk_buff *skb, u16 source_node_id,
+					bool is_broadcast, u16 ether_type)
+{
+	struct fwnet_device *dev;
+	static const __be64 broadcast_hw = cpu_to_be64(~0ULL);
 	int status;
-	u64 guid;
+	__be64 guid;
 
-	fw_debug ( "ipv4_finish_incoming_packet(%p, %p, %x, %s, %x\n",
- netdev, skb, source_node_id, is_broadcast ? "true" : "f