blob: c2e194c5866717633d426636cc5cd5e43efa821e [file] [log] [blame]
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001/*
2 * IPv4 over IEEE 1394, per RFC 2734
3 *
4 * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com>
5 *
6 * based on eth1394 by Ben Collins et al
7 */
8
Stefan Richterf91e3bd2009-06-07 22:57:53 +02009#include <linux/bug.h>
Stefan Richter48553012010-11-06 23:18:23 +010010#include <linux/delay.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040011#include <linux/device.h>
Stefan Richterc1671472010-12-17 22:22:33 +010012#include <linux/ethtool.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040013#include <linux/firewire.h>
14#include <linux/firewire-constants.h>
15#include <linux/highmem.h>
16#include <linux/in.h>
17#include <linux/ip.h>
Stefan Richterf91e3bd2009-06-07 22:57:53 +020018#include <linux/jiffies.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040019#include <linux/mod_devicetable.h>
20#include <linux/module.h>
21#include <linux/moduleparam.h>
Stefan Richter5a124d32009-06-14 11:45:27 +020022#include <linux/mutex.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040023#include <linux/netdevice.h>
24#include <linux/skbuff.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Stefan Richter5a124d32009-06-14 11:45:27 +020026#include <linux/spinlock.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040027
28#include <asm/unaligned.h>
29#include <net/arp.h>
30
Stefan Richterb2268832010-11-14 14:35:40 +010031/* rx limits */
32#define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */
33#define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2)
34
35/* tx limits */
36#define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */
37#define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */
38#define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040039
Stefan Richterf91e3bd2009-06-07 22:57:53 +020040#define IEEE1394_BROADCAST_CHANNEL 31
41#define IEEE1394_ALL_NODES (0xffc0 | 0x003f)
42#define IEEE1394_MAX_PAYLOAD_S100 512
43#define FWNET_NO_FIFO_ADDR (~0ULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -040044
Stefan Richterf91e3bd2009-06-07 22:57:53 +020045#define IANA_SPECIFIER_ID 0x00005eU
46#define RFC2734_SW_VERSION 0x000001U
Jay Fenlasonc76acec2009-05-18 13:08:06 -040047
Stefan Richterf91e3bd2009-06-07 22:57:53 +020048#define IEEE1394_GASP_HDR_SIZE 8
Jay Fenlasonc76acec2009-05-18 13:08:06 -040049
Stefan Richterf91e3bd2009-06-07 22:57:53 +020050#define RFC2374_UNFRAG_HDR_SIZE 4
51#define RFC2374_FRAG_HDR_SIZE 8
52#define RFC2374_FRAG_OVERHEAD 4
Jay Fenlasonc76acec2009-05-18 13:08:06 -040053
Stefan Richterf91e3bd2009-06-07 22:57:53 +020054#define RFC2374_HDR_UNFRAG 0 /* unfragmented */
55#define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */
56#define RFC2374_HDR_LASTFRAG 2 /* last fragment */
57#define RFC2374_HDR_INTFRAG 3 /* interior fragment */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040058
Stefan Richterf91e3bd2009-06-07 22:57:53 +020059#define RFC2734_HW_ADDR_LEN 16
Jay Fenlasonc76acec2009-05-18 13:08:06 -040060
Stefan Richterf91e3bd2009-06-07 22:57:53 +020061struct rfc2734_arp {
62 __be16 hw_type; /* 0x0018 */
63 __be16 proto_type; /* 0x0806 */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040064 u8 hw_addr_len; /* 16 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +020065 u8 ip_addr_len; /* 4 */
66 __be16 opcode; /* ARP Opcode */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040067 /* Above is exactly the same format as struct arphdr */
68
Stefan Richterf91e3bd2009-06-07 22:57:53 +020069 __be64 s_uniq_id; /* Sender's 64bit EUI */
70 u8 max_rec; /* Sender's max packet size */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040071 u8 sspd; /* Sender's max speed */
Stefan Richterf91e3bd2009-06-07 22:57:53 +020072 __be16 fifo_hi; /* hi 16bits of sender's FIFO addr */
73 __be32 fifo_lo; /* lo 32bits of sender's FIFO addr */
74 __be32 sip; /* Sender's IP Address */
75 __be32 tip; /* IP Address of requested hw addr */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040076} __attribute__((packed));
77
Stefan Richterf91e3bd2009-06-07 22:57:53 +020078/* This header format is specific to this driver implementation. */
79#define FWNET_ALEN 8
80#define FWNET_HLEN 10
81struct fwnet_header {
82 u8 h_dest[FWNET_ALEN]; /* destination address */
83 __be16 h_proto; /* packet type ID field */
84} __attribute__((packed));
Jay Fenlasonc76acec2009-05-18 13:08:06 -040085
Stefan Richterf91e3bd2009-06-07 22:57:53 +020086/* IPv4 and IPv6 encapsulation header */
87struct rfc2734_header {
Jay Fenlasonc76acec2009-05-18 13:08:06 -040088 u32 w0;
89 u32 w1;
90};
91
Stefan Richterf91e3bd2009-06-07 22:57:53 +020092#define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30)
93#define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff))
94#define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16)
95#define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff))
96#define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16)
97
98#define fwnet_set_hdr_lf(lf) ((lf) << 30)
99#define fwnet_set_hdr_ether_type(et) (et)
100#define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16)
101#define fwnet_set_hdr_fg_off(fgo) (fgo)
102
103#define fwnet_set_hdr_dgl(dgl) ((dgl) << 16)
104
105static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr,
106 unsigned ether_type)
107{
108 hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG)
109 | fwnet_set_hdr_ether_type(ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400110}
111
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200112static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr,
113 unsigned ether_type, unsigned dg_size, unsigned dgl)
114{
115 hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG)
116 | fwnet_set_hdr_dg_size(dg_size)
117 | fwnet_set_hdr_ether_type(ether_type);
118 hdr->w1 = fwnet_set_hdr_dgl(dgl);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400119}
120
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200121static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr,
122 unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl)
123{
124 hdr->w0 = fwnet_set_hdr_lf(lf)
125 | fwnet_set_hdr_dg_size(dg_size)
126 | fwnet_set_hdr_fg_off(fg_off);
127 hdr->w1 = fwnet_set_hdr_dgl(dgl);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400128}
129
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400130/* This list keeps track of what parts of the datagram have been filled in */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200131struct fwnet_fragment_info {
132 struct list_head fi_link;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400133 u16 offset;
134 u16 len;
135};
136
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200137struct fwnet_partial_datagram {
138 struct list_head pd_link;
139 struct list_head fi_list;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400140 struct sk_buff *skb;
141 /* FIXME Why not use skb->data? */
142 char *pbuf;
143 u16 datagram_label;
144 u16 ether_type;
145 u16 datagram_size;
146};
147
Stefan Richter5a124d32009-06-14 11:45:27 +0200148static DEFINE_MUTEX(fwnet_device_mutex);
149static LIST_HEAD(fwnet_device_list);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400150
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200151struct fwnet_device {
Stefan Richter5a124d32009-06-14 11:45:27 +0200152 struct list_head dev_link;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400153 spinlock_t lock;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200154 enum {
155 FWNET_BROADCAST_ERROR,
156 FWNET_BROADCAST_RUNNING,
157 FWNET_BROADCAST_STOPPED,
158 } broadcast_state;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400159 struct fw_iso_context *broadcast_rcv_context;
160 struct fw_iso_buffer broadcast_rcv_buffer;
161 void **broadcast_rcv_buffer_ptrs;
162 unsigned broadcast_rcv_next_ptr;
163 unsigned num_broadcast_rcv_ptrs;
164 unsigned rcv_buffer_size;
165 /*
166 * This value is the maximum unfragmented datagram size that can be
167 * sent by the hardware. It already has the GASP overhead and the
168 * unfragmented datagram header overhead calculated into it.
169 */
170 unsigned broadcast_xmt_max_payload;
171 u16 broadcast_xmt_datagramlabel;
172
173 /*
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200174 * The CSR address that remote nodes must send datagrams to for us to
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400175 * receive them.
176 */
177 struct fw_address_handler handler;
178 u64 local_fifo;
179
Stefan Richter48553012010-11-06 23:18:23 +0100180 /* Number of tx datagrams that have been queued but not yet acked */
181 int queued_datagrams;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400182
Stefan Richterc1671472010-12-17 22:22:33 +0100183 int peer_count;
Stefan Richter5a124d32009-06-14 11:45:27 +0200184 struct list_head peer_list;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400185 struct fw_card *card;
Stefan Richter5a124d32009-06-14 11:45:27 +0200186 struct net_device *netdev;
187};
188
189struct fwnet_peer {
190 struct list_head peer_link;
191 struct fwnet_device *dev;
192 u64 guid;
193 u64 fifo;
194
195 /* guarded by dev->lock */
196 struct list_head pd_list; /* received partial datagrams */
197 unsigned pdg_size; /* pd_list size */
198
199 u16 datagram_label; /* outgoing datagram label */
Stefan Richter48553012010-11-06 23:18:23 +0100200 u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */
Stefan Richter5a124d32009-06-14 11:45:27 +0200201 int node_id;
202 int generation;
203 unsigned speed;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400204};
205
206/* This is our task struct. It's used for the packet complete callback. */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200207struct fwnet_packet_task {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400208 struct fw_transaction transaction;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200209 struct rfc2734_header hdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400210 struct sk_buff *skb;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200211 struct fwnet_device *dev;
212
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400213 int outstanding_pkts;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400214 u64 fifo_addr;
215 u16 dest_node;
Stefan Richter48553012010-11-06 23:18:23 +0100216 u16 max_payload;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400217 u8 generation;
218 u8 speed;
Stefan Richter48553012010-11-06 23:18:23 +0100219 u8 enqueued;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400220};
221
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200222/*
223 * saddr == NULL means use device source address.
224 * daddr == NULL means leave destination address (eg unresolved arp).
225 */
226static int fwnet_header_create(struct sk_buff *skb, struct net_device *net,
227 unsigned short type, const void *daddr,
228 const void *saddr, unsigned len)
229{
230 struct fwnet_header *h;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400231
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200232 h = (struct fwnet_header *)skb_push(skb, sizeof(*h));
233 put_unaligned_be16(type, &h->h_proto);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400234
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200235 if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) {
236 memset(h->h_dest, 0, net->addr_len);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400237
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200238 return net->hard_header_len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400239 }
240
241 if (daddr) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200242 memcpy(h->h_dest, daddr, net->addr_len);
243
244 return net->hard_header_len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400245 }
246
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200247 return -net->hard_header_len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400248}
249
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200250static int fwnet_header_rebuild(struct sk_buff *skb)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400251{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200252 struct fwnet_header *h = (struct fwnet_header *)skb->data;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400253
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200254 if (get_unaligned_be16(&h->h_proto) == ETH_P_IP)
255 return arp_find((unsigned char *)&h->h_dest, skb);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400256
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200257 fw_notify("%s: unable to resolve type %04x addresses\n",
258 skb->dev->name, be16_to_cpu(h->h_proto));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400259 return 0;
260}
261
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200262static int fwnet_header_cache(const struct neighbour *neigh,
263 struct hh_cache *hh)
264{
265 struct net_device *net;
266 struct fwnet_header *h;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400267
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200268 if (hh->hh_type == cpu_to_be16(ETH_P_802_3))
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400269 return -1;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200270 net = neigh->dev;
271 h = (struct fwnet_header *)((u8 *)hh->hh_data + 16 - sizeof(*h));
272 h->h_proto = hh->hh_type;
273 memcpy(h->h_dest, neigh->ha, net->addr_len);
274 hh->hh_len = FWNET_HLEN;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400275
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400276 return 0;
277}
278
279/* Called by Address Resolution module to notify changes in address. */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200280static void fwnet_header_cache_update(struct hh_cache *hh,
281 const struct net_device *net, const unsigned char *haddr)
282{
283 memcpy((u8 *)hh->hh_data + 16 - FWNET_HLEN, haddr, net->addr_len);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400284}
285
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200286static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr)
287{
288 memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN);
289
290 return FWNET_ALEN;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400291}
292
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200293static const struct header_ops fwnet_header_ops = {
294 .create = fwnet_header_create,
295 .rebuild = fwnet_header_rebuild,
296 .cache = fwnet_header_cache,
297 .cache_update = fwnet_header_cache_update,
298 .parse = fwnet_header_parse,
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400299};
300
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400301/* FIXME: is this correct for all cases? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200302static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd,
303 unsigned offset, unsigned len)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400304{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200305 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400306 unsigned end = offset + len;
307
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200308 list_for_each_entry(fi, &pd->fi_list, fi_link)
309 if (offset < fi->offset + fi->len && end > fi->offset)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400310 return true;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200311
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400312 return false;
313}
314
315/* Assumes that new fragment does not overlap any existing fragments */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200316static struct fwnet_fragment_info *fwnet_frag_new(
317 struct fwnet_partial_datagram *pd, unsigned offset, unsigned len)
318{
319 struct fwnet_fragment_info *fi, *fi2, *new;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400320 struct list_head *list;
321
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200322 list = &pd->fi_list;
323 list_for_each_entry(fi, &pd->fi_list, fi_link) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400324 if (fi->offset + fi->len == offset) {
325 /* The new fragment can be tacked on to the end */
326 /* Did the new fragment plug a hole? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200327 fi2 = list_entry(fi->fi_link.next,
328 struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400329 if (fi->offset + fi->len == fi2->offset) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400330 /* glue fragments together */
331 fi->len += len + fi2->len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200332 list_del(&fi2->fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400333 kfree(fi2);
334 } else {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400335 fi->len += len;
336 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200337
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400338 return fi;
339 }
340 if (offset + len == fi->offset) {
341 /* The new fragment can be tacked on to the beginning */
342 /* Did the new fragment plug a hole? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200343 fi2 = list_entry(fi->fi_link.prev,
344 struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400345 if (fi2->offset + fi2->len == fi->offset) {
346 /* glue fragments together */
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400347 fi2->len += fi->len + len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200348 list_del(&fi->fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400349 kfree(fi);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200350
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400351 return fi2;
352 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400353 fi->offset = offset;
354 fi->len += len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200355
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400356 return fi;
357 }
358 if (offset > fi->offset + fi->len) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200359 list = &fi->fi_link;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400360 break;
361 }
362 if (offset + len < fi->offset) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200363 list = fi->fi_link.prev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400364 break;
365 }
366 }
367
368 new = kmalloc(sizeof(*new), GFP_ATOMIC);
369 if (!new) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200370 fw_error("out of memory\n");
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400371 return NULL;
372 }
373
374 new->offset = offset;
375 new->len = len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200376 list_add(&new->fi_link, list);
377
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400378 return new;
379}
380
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200381static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net,
382 struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size,
383 void *frag_buf, unsigned frag_off, unsigned frag_len)
384{
385 struct fwnet_partial_datagram *new;
386 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400387
388 new = kmalloc(sizeof(*new), GFP_ATOMIC);
389 if (!new)
390 goto fail;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200391
392 INIT_LIST_HEAD(&new->fi_list);
393 fi = fwnet_frag_new(new, frag_off, frag_len);
394 if (fi == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400395 goto fail_w_new;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200396
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400397 new->datagram_label = datagram_label;
398 new->datagram_size = dg_size;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200399 new->skb = dev_alloc_skb(dg_size + net->hard_header_len + 15);
400 if (new->skb == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400401 goto fail_w_fi;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200402
403 skb_reserve(new->skb, (net->hard_header_len + 15) & ~15);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400404 new->pbuf = skb_put(new->skb, dg_size);
405 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200406 list_add_tail(&new->pd_link, &peer->pd_list);
407
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400408 return new;
409
410fail_w_fi:
411 kfree(fi);
412fail_w_new:
413 kfree(new);
414fail:
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200415 fw_error("out of memory\n");
416
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400417 return NULL;
418}
419
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200420static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer,
421 u16 datagram_label)
422{
423 struct fwnet_partial_datagram *pd;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400424
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200425 list_for_each_entry(pd, &peer->pd_list, pd_link)
426 if (pd->datagram_label == datagram_label)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400427 return pd;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200428
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400429 return NULL;
430}
431
432
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200433static void fwnet_pd_delete(struct fwnet_partial_datagram *old)
434{
435 struct fwnet_fragment_info *fi, *n;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400436
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200437 list_for_each_entry_safe(fi, n, &old->fi_list, fi_link)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400438 kfree(fi);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200439
440 list_del(&old->pd_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400441 dev_kfree_skb_any(old->skb);
442 kfree(old);
443}
444
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200445static bool fwnet_pd_update(struct fwnet_peer *peer,
446 struct fwnet_partial_datagram *pd, void *frag_buf,
447 unsigned frag_off, unsigned frag_len)
448{
449 if (fwnet_frag_new(pd, frag_off, frag_len) == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400450 return false;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200451
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400452 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
453
454 /*
455 * Move list entry to beginnig of list so that oldest partial
456 * datagrams percolate to the end of the list
457 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200458 list_move_tail(&pd->pd_link, &peer->pd_list);
459
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400460 return true;
461}
462
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200463static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd)
464{
465 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400466
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200467 fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400468
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200469 return fi->len == pd->datagram_size;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400470}
471
Stefan Richter5a124d32009-06-14 11:45:27 +0200472/* caller must hold dev->lock */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200473static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev,
474 u64 guid)
475{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200476 struct fwnet_peer *peer;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400477
Stefan Richter5a124d32009-06-14 11:45:27 +0200478 list_for_each_entry(peer, &dev->peer_list, peer_link)
479 if (peer->guid == guid)
480 return peer;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200481
Stefan Richter5a124d32009-06-14 11:45:27 +0200482 return NULL;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400483}
484
Stefan Richter5a124d32009-06-14 11:45:27 +0200485/* caller must hold dev->lock */
486static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev,
487 int node_id, int generation)
488{
489 struct fwnet_peer *peer;
490
491 list_for_each_entry(peer, &dev->peer_list, peer_link)
492 if (peer->node_id == node_id &&
493 peer->generation == generation)
494 return peer;
495
496 return NULL;
497}
498
499/* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */
500static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed)
501{
502 max_rec = min(max_rec, speed + 8);
503 max_rec = min(max_rec, 0xbU); /* <= 4096 */
504 if (max_rec < 8) {
505 fw_notify("max_rec %x out of range\n", max_rec);
506 max_rec = 8;
507 }
508
509 return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE;
510}
511
512
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200513static int fwnet_finish_incoming_packet(struct net_device *net,
514 struct sk_buff *skb, u16 source_node_id,
515 bool is_broadcast, u16 ether_type)
516{
517 struct fwnet_device *dev;
518 static const __be64 broadcast_hw = cpu_to_be64(~0ULL);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400519 int status;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200520 __be64 guid;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400521
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200522 dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400523 /* Write metadata, and then pass to the receive level */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200524 skb->dev = net;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400525 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
526
527 /*
528 * Parse the encapsulation header. This actually does the job of
529 * converting to an ethernet frame header, as well as arp
530 * conversion if needed. ARP conversion is easier in this
531 * direction, since we are using ethernet as our backend.
532 */
533 /*
534 * If this is an ARP packet, convert it. First, we want to make
535 * use of some of the fields, since they tell us a little bit
536 * about the sending machine.
537 */
538 if (ether_type == ETH_P_ARP) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200539 struct rfc2734_arp *arp1394;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400540 struct arphdr *arp;
541 unsigned char *arp_ptr;
542 u64 fifo_addr;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200543 u64 peer_guid;
Stefan Richter5a124d32009-06-14 11:45:27 +0200544 unsigned sspd;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400545 u16 max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200546 struct fwnet_peer *peer;
Stefan Richter5a124d32009-06-14 11:45:27 +0200547 unsigned long flags;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400548
Stefan Richter5a124d32009-06-14 11:45:27 +0200549 arp1394 = (struct rfc2734_arp *)skb->data;
550 arp = (struct arphdr *)skb->data;
551 arp_ptr = (unsigned char *)(arp + 1);
552 peer_guid = get_unaligned_be64(&arp1394->s_uniq_id);
553 fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32
554 | get_unaligned_be32(&arp1394->fifo_lo);
555
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400556 sspd = arp1394->sspd;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200557 /* Sanity check. OS X 10.3 PPC reportedly sends 131. */
558 if (sspd > SCODE_3200) {
559 fw_notify("sspd %x out of range\n", sspd);
Stefan Richter5a124d32009-06-14 11:45:27 +0200560 sspd = SCODE_3200;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400561 }
Stefan Richter5a124d32009-06-14 11:45:27 +0200562 max_payload = fwnet_max_payload(arp1394->max_rec, sspd);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400563
Stefan Richter5a124d32009-06-14 11:45:27 +0200564 spin_lock_irqsave(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200565 peer = fwnet_peer_find_by_guid(dev, peer_guid);
Stefan Richter5a124d32009-06-14 11:45:27 +0200566 if (peer) {
567 peer->fifo = fifo_addr;
568
569 if (peer->speed > sspd)
570 peer->speed = sspd;
571 if (peer->max_payload > max_payload)
572 peer->max_payload = max_payload;
573 }
574 spin_unlock_irqrestore(&dev->lock, flags);
575
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200576 if (!peer) {
577 fw_notify("No peer for ARP packet from %016llx\n",
578 (unsigned long long)peer_guid);
Stefan Richter1bf145f2010-08-16 23:45:54 +0200579 goto no_peer;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400580 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200581
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400582 /*
583 * Now that we're done with the 1394 specific stuff, we'll
584 * need to alter some of the data. Believe it or not, all
585 * that needs to be done is sender_IP_address needs to be
586 * moved, the destination hardware address get stuffed
587 * in and the hardware address length set to 8.
588 *
589 * IMPORTANT: The code below overwrites 1394 specific data
590 * needed above so keep the munging of the data for the
591 * higher level IP stack last.
592 */
593
594 arp->ar_hln = 8;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200595 /* skip over sender unique id */
596 arp_ptr += arp->ar_hln;
597 /* move sender IP addr */
598 put_unaligned(arp1394->sip, (u32 *)arp_ptr);
599 /* skip over sender IP addr */
600 arp_ptr += arp->ar_pln;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400601
602 if (arp->ar_op == htons(ARPOP_REQUEST))
603 memset(arp_ptr, 0, sizeof(u64));
604 else
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200605 memcpy(arp_ptr, net->dev_addr, sizeof(u64));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400606 }
607
608 /* Now add the ethernet header. */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200609 guid = cpu_to_be64(dev->card->guid);
610 if (dev_hard_header(skb, net, ether_type,
611 is_broadcast ? &broadcast_hw : &guid,
612 NULL, skb->len) >= 0) {
613 struct fwnet_header *eth;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400614 u16 *rawp;
615 __be16 protocol;
616
617 skb_reset_mac_header(skb);
618 skb_pull(skb, sizeof(*eth));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200619 eth = (struct fwnet_header *)skb_mac_header(skb);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400620 if (*eth->h_dest & 1) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200621 if (memcmp(eth->h_dest, net->broadcast,
622 net->addr_len) == 0)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400623 skb->pkt_type = PACKET_BROADCAST;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400624#if 0
625 else
626 skb->pkt_type = PACKET_MULTICAST;
627#endif
628 } else {
Stefan Richter156ce862009-06-14 11:46:57 +0200629 if (memcmp(eth->h_dest, net->dev_addr, net->addr_len))
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400630 skb->pkt_type = PACKET_OTHERHOST;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400631 }
632 if (ntohs(eth->h_proto) >= 1536) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400633 protocol = eth->h_proto;
634 } else {
635 rawp = (u16 *)skb->data;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200636 if (*rawp == 0xffff)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400637 protocol = htons(ETH_P_802_3);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200638 else
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400639 protocol = htons(ETH_P_802_2);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400640 }
641 skb->protocol = protocol;
642 }
643 status = netif_rx(skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200644 if (status == NET_RX_DROP) {
645 net->stats.rx_errors++;
646 net->stats.rx_dropped++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400647 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200648 net->stats.rx_packets++;
649 net->stats.rx_bytes += skb->len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400650 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200651
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400652 return 0;
653
Stefan Richter1bf145f2010-08-16 23:45:54 +0200654 no_peer:
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200655 net->stats.rx_errors++;
656 net->stats.rx_dropped++;
657
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400658 dev_kfree_skb_any(skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200659
Stefan Richter1bf145f2010-08-16 23:45:54 +0200660 return -ENOENT;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400661}
662
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200663static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len,
Stefan Richter5a124d32009-06-14 11:45:27 +0200664 int source_node_id, int generation,
665 bool is_broadcast)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200666{
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400667 struct sk_buff *skb;
Stefan Richter5a124d32009-06-14 11:45:27 +0200668 struct net_device *net = dev->netdev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200669 struct rfc2734_header hdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400670 unsigned lf;
671 unsigned long flags;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200672 struct fwnet_peer *peer;
673 struct fwnet_partial_datagram *pd;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400674 int fg_off;
675 int dg_size;
676 u16 datagram_label;
677 int retval;
678 u16 ether_type;
679
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200680 hdr.w0 = be32_to_cpu(buf[0]);
681 lf = fwnet_get_hdr_lf(&hdr);
682 if (lf == RFC2374_HDR_UNFRAG) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400683 /*
684 * An unfragmented datagram has been received by the ieee1394
685 * bus. Build an skbuff around it so we can pass it to the
686 * high level network layer.
687 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200688 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400689 buf++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200690 len -= RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400691
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200692 skb = dev_alloc_skb(len + net->hard_header_len + 15);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400693 if (unlikely(!skb)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200694 fw_error("out of memory\n");
695 net->stats.rx_dropped++;
696
Stefan Richter1bf145f2010-08-16 23:45:54 +0200697 return -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400698 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200699 skb_reserve(skb, (net->hard_header_len + 15) & ~15);
700 memcpy(skb_put(skb, len), buf, len);
701
702 return fwnet_finish_incoming_packet(net, skb, source_node_id,
703 is_broadcast, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400704 }
705 /* A datagram fragment has been received, now the fun begins. */
706 hdr.w1 = ntohl(buf[1]);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200707 buf += 2;
708 len -= RFC2374_FRAG_HDR_SIZE;
709 if (lf == RFC2374_HDR_FIRSTFRAG) {
710 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400711 fg_off = 0;
712 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200713 ether_type = 0;
714 fg_off = fwnet_get_hdr_fg_off(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400715 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200716 datagram_label = fwnet_get_hdr_dgl(&hdr);
717 dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200718
Stefan Richter5a124d32009-06-14 11:45:27 +0200719 spin_lock_irqsave(&dev->lock, flags);
720
721 peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation);
Stefan Richter1bf145f2010-08-16 23:45:54 +0200722 if (!peer) {
723 retval = -ENOENT;
724 goto fail;
725 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200726
727 pd = fwnet_pd_find(peer, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400728 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200729 while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400730 /* remove the oldest */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200731 fwnet_pd_delete(list_first_entry(&peer->pd_list,
732 struct fwnet_partial_datagram, pd_link));
733 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400734 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200735 pd = fwnet_pd_new(net, peer, datagram_label,
736 dg_size, buf, fg_off, len);
737 if (pd == NULL) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400738 retval = -ENOMEM;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200739 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400740 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200741 peer->pdg_size++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400742 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200743 if (fwnet_frag_overlap(pd, fg_off, len) ||
744 pd->datagram_size != dg_size) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400745 /*
746 * Differing datagram sizes or overlapping fragments,
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200747 * discard old datagram and start a new one.
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400748 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200749 fwnet_pd_delete(pd);
750 pd = fwnet_pd_new(net, peer, datagram_label,
751 dg_size, buf, fg_off, len);
752 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200753 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200754 retval = -ENOMEM;
755 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400756 }
757 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200758 if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400759 /*
760 * Couldn't save off fragment anyway
761 * so might as well obliterate the
762 * datagram now.
763 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200764 fwnet_pd_delete(pd);
765 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200766 retval = -ENOMEM;
767 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400768 }
769 }
770 } /* new datagram or add to existing one */
771
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200772 if (lf == RFC2374_HDR_FIRSTFRAG)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400773 pd->ether_type = ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200774
775 if (fwnet_pd_is_complete(pd)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400776 ether_type = pd->ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200777 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400778 skb = skb_get(pd->skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200779 fwnet_pd_delete(pd);
780
Stefan Richter5a124d32009-06-14 11:45:27 +0200781 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200782
783 return fwnet_finish_incoming_packet(net, skb, source_node_id,
784 false, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400785 }
786 /*
787 * Datagram is not complete, we're done for the
788 * moment.
789 */
Stefan Richterb2268832010-11-14 14:35:40 +0100790 retval = 0;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200791 fail:
Stefan Richter5a124d32009-06-14 11:45:27 +0200792 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200793
Stefan Richter1bf145f2010-08-16 23:45:54 +0200794 return retval;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400795}
796
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200797static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r,
798 int tcode, int destination, int source, int generation,
Stefan Richter33e553f2010-06-20 22:50:35 +0200799 unsigned long long offset, void *payload, size_t length,
800 void *callback_data)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200801{
Stefan Richter00635b82009-06-16 22:35:32 +0200802 struct fwnet_device *dev = callback_data;
803 int rcode;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400804
Stefan Richter00635b82009-06-16 22:35:32 +0200805 if (destination == IEEE1394_ALL_NODES) {
806 kfree(r);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200807
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400808 return;
809 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200810
Stefan Richter00635b82009-06-16 22:35:32 +0200811 if (offset != dev->handler.offset)
812 rcode = RCODE_ADDRESS_ERROR;
813 else if (tcode != TCODE_WRITE_BLOCK_REQUEST)
814 rcode = RCODE_TYPE_ERROR;
815 else if (fwnet_incoming_packet(dev, payload, length,
816 source, generation, false) != 0) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200817 fw_error("Incoming packet failure\n");
Stefan Richter00635b82009-06-16 22:35:32 +0200818 rcode = RCODE_CONFLICT_ERROR;
819 } else
820 rcode = RCODE_COMPLETE;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200821
Stefan Richter00635b82009-06-16 22:35:32 +0200822 fw_send_response(card, r, rcode);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400823}
824
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200825static void fwnet_receive_broadcast(struct fw_iso_context *context,
826 u32 cycle, size_t header_length, void *header, void *data)
827{
828 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400829 struct fw_iso_packet packet;
830 struct fw_card *card;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200831 __be16 *hdr_ptr;
832 __be32 *buf_ptr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400833 int retval;
834 u32 length;
835 u16 source_node_id;
836 u32 specifier_id;
837 u32 ver;
838 unsigned long offset;
839 unsigned long flags;
840
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200841 dev = data;
842 card = dev->card;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400843 hdr_ptr = header;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200844 length = be16_to_cpup(hdr_ptr);
845
846 spin_lock_irqsave(&dev->lock, flags);
847
848 offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr;
849 buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++];
850 if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs)
851 dev->broadcast_rcv_next_ptr = 0;
852
853 spin_unlock_irqrestore(&dev->lock, flags);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400854
855 specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8
856 | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200857 ver = be32_to_cpu(buf_ptr[1]) & 0xffffff;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400858 source_node_id = be32_to_cpu(buf_ptr[0]) >> 16;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200859
860 if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400861 buf_ptr += 2;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200862 length -= IEEE1394_GASP_HDR_SIZE;
863 fwnet_incoming_packet(dev, buf_ptr, length,
Stefan Richter5a124d32009-06-14 11:45:27 +0200864 source_node_id, -1, true);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200865 }
866
867 packet.payload_length = dev->rcv_buffer_size;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400868 packet.interrupt = 1;
869 packet.skip = 0;
870 packet.tag = 3;
871 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200872 packet.header_length = IEEE1394_GASP_HDR_SIZE;
873
874 spin_lock_irqsave(&dev->lock, flags);
875
876 retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet,
877 &dev->broadcast_rcv_buffer, offset);
878
879 spin_unlock_irqrestore(&dev->lock, flags);
880
881 if (retval < 0)
882 fw_error("requeue failed\n");
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400883}
884
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200885static struct kmem_cache *fwnet_packet_task_cache;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400886
Stefan Richter110f82d2010-01-18 22:36:49 +0100887static void fwnet_free_ptask(struct fwnet_packet_task *ptask)
888{
889 dev_kfree_skb_any(ptask->skb);
890 kmem_cache_free(fwnet_packet_task_cache, ptask);
891}
892
Stefan Richterb2268832010-11-14 14:35:40 +0100893/* Caller must hold dev->lock. */
894static void dec_queued_datagrams(struct fwnet_device *dev)
895{
896 if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS)
897 netif_wake_queue(dev->netdev);
898}
899
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200900static int fwnet_send_packet(struct fwnet_packet_task *ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400901
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200902static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask)
903{
Stefan Richter110f82d2010-01-18 22:36:49 +0100904 struct fwnet_device *dev = ptask->dev;
Stefan Richter902bca02010-11-06 12:36:13 +0100905 struct sk_buff *skb = ptask->skb;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400906 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +0100907 bool free;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200908
909 spin_lock_irqsave(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200910
Stefan Richter110f82d2010-01-18 22:36:49 +0100911 ptask->outstanding_pkts--;
912
913 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100914 free = (ptask->outstanding_pkts == 0 && ptask->enqueued);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100915 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100916 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +0100917
Stefan Richter902bca02010-11-06 12:36:13 +0100918 if (ptask->outstanding_pkts == 0) {
Stefan Richter902bca02010-11-06 12:36:13 +0100919 dev->netdev->stats.tx_packets++;
920 dev->netdev->stats.tx_bytes += skb->len;
921 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100922
923 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200924
925 if (ptask->outstanding_pkts > 0) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400926 u16 dg_size;
927 u16 fg_off;
928 u16 datagram_label;
929 u16 lf;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400930
931 /* Update the ptask to point to the next fragment and send it */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200932 lf = fwnet_get_hdr_lf(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400933 switch (lf) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200934 case RFC2374_HDR_LASTFRAG:
935 case RFC2374_HDR_UNFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400936 default:
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200937 fw_error("Outstanding packet %x lf %x, header %x,%x\n",
938 ptask->outstanding_pkts, lf, ptask->hdr.w0,
939 ptask->hdr.w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400940 BUG();
941
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200942 case RFC2374_HDR_FIRSTFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400943 /* Set frag type here for future interior fragments */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200944 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
945 fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
946 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400947 break;
948
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200949 case RFC2374_HDR_INTFRAG:
950 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
951 fg_off = fwnet_get_hdr_fg_off(&ptask->hdr)
952 + ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
953 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400954 break;
955 }
Stefan Richter902bca02010-11-06 12:36:13 +0100956
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200957 skb_pull(skb, ptask->max_payload);
958 if (ptask->outstanding_pkts > 1) {
959 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG,
960 dg_size, fg_off, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400961 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200962 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG,
963 dg_size, fg_off, datagram_label);
964 ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400965 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200966 fwnet_send_packet(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400967 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100968
969 if (free)
970 fwnet_free_ptask(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400971}
972
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100973static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask)
974{
975 struct fwnet_device *dev = ptask->dev;
976 unsigned long flags;
977 bool free;
978
979 spin_lock_irqsave(&dev->lock, flags);
980
981 /* One fragment failed; don't try to send remaining fragments. */
982 ptask->outstanding_pkts = 0;
983
984 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100985 free = ptask->enqueued;
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100986 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100987 dec_queued_datagrams(dev);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100988
989 dev->netdev->stats.tx_dropped++;
990 dev->netdev->stats.tx_errors++;
991
992 spin_unlock_irqrestore(&dev->lock, flags);
993
994 if (free)
995 fwnet_free_ptask(ptask);
996}
997
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200998static void fwnet_write_complete(struct fw_card *card, int rcode,
999 void *payload, size_t length, void *data)
1000{
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +02001001 struct fwnet_packet_task *ptask = data;
1002 static unsigned long j;
1003 static int last_rcode, errors_skipped;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001004
Stefan Richter7ee11fa2010-11-06 16:57:28 +01001005 if (rcode == RCODE_COMPLETE) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001006 fwnet_transmit_packet_done(ptask);
Stefan Richter7ee11fa2010-11-06 16:57:28 +01001007 } else {
Stefan Richter7ee11fa2010-11-06 16:57:28 +01001008 fwnet_transmit_packet_failed(ptask);
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +02001009
1010 if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) {
1011 fw_error("fwnet_write_complete: "
1012 "failed: %x (skipped %d)\n", rcode, errors_skipped);
1013
1014 errors_skipped = 0;
1015 last_rcode = rcode;
1016 } else
1017 errors_skipped++;
Stefan Richter7ee11fa2010-11-06 16:57:28 +01001018 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001019}
1020
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001021static int fwnet_send_packet(struct fwnet_packet_task *ptask)
1022{
1023 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001024 unsigned tx_len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001025 struct rfc2734_header *bufhdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001026 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +01001027 bool free;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001028
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001029 dev = ptask->dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001030 tx_len = ptask->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001031 switch (fwnet_get_hdr_lf(&ptask->hdr)) {
1032 case RFC2374_HDR_UNFRAG:
1033 bufhdr = (struct rfc2734_header *)
1034 skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE);
1035 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001036 break;
1037
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001038 case RFC2374_HDR_FIRSTFRAG:
1039 case RFC2374_HDR_INTFRAG:
1040 case RFC2374_HDR_LASTFRAG:
1041 bufhdr = (struct rfc2734_header *)
1042 skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE);
1043 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
1044 put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001045 break;
1046
1047 default:
1048 BUG();
1049 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001050 if (ptask->dest_node == IEEE1394_ALL_NODES) {
1051 u8 *p;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001052 int generation;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001053 int node_id;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001054
1055 /* ptask->generation may not have been set yet */
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001056 generation = dev->card->generation;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001057 smp_rmb();
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001058 node_id = dev->card->node_id;
1059
1060 p = skb_push(ptask->skb, 8);
1061 put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p);
1062 put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24
1063 | RFC2734_SW_VERSION, &p[4]);
1064
1065 /* We should not transmit if broadcast_channel.valid == 0. */
1066 fw_send_request(dev->card, &ptask->transaction,
1067 TCODE_STREAM_DATA,
1068 fw_stream_packet_destination_id(3,
1069 IEEE1394_BROADCAST_CHANNEL, 0),
1070 generation, SCODE_100, 0ULL, ptask->skb->data,
1071 tx_len + 8, fwnet_write_complete, ptask);
1072
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001073 spin_lock_irqsave(&dev->lock, flags);
Stefan Richter110f82d2010-01-18 22:36:49 +01001074
1075 /* If the AT tasklet already ran, we may be last user. */
Stefan Richter48553012010-11-06 23:18:23 +01001076 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
Stefan Richter110f82d2010-01-18 22:36:49 +01001077 if (!free)
Stefan Richter48553012010-11-06 23:18:23 +01001078 ptask->enqueued = true;
1079 else
Stefan Richterb2268832010-11-14 14:35:40 +01001080 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001081
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001082 spin_unlock_irqrestore(&dev->lock, flags);
1083
Stefan Richter110f82d2010-01-18 22:36:49 +01001084 goto out;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001085 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001086
1087 fw_send_request(dev->card, &ptask->transaction,
1088 TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node,
1089 ptask->generation, ptask->speed, ptask->fifo_addr,
1090 ptask->skb->data, tx_len, fwnet_write_complete, ptask);
1091
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001092 spin_lock_irqsave(&dev->lock, flags);
Stefan Richter110f82d2010-01-18 22:36:49 +01001093
1094 /* If the AT tasklet already ran, we may be last user. */
Stefan Richter48553012010-11-06 23:18:23 +01001095 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
Stefan Richter110f82d2010-01-18 22:36:49 +01001096 if (!free)
Stefan Richter48553012010-11-06 23:18:23 +01001097 ptask->enqueued = true;
1098 else
Stefan Richterb2268832010-11-14 14:35:40 +01001099 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001100
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001101 spin_unlock_irqrestore(&dev->lock, flags);
1102
Stefan Richter5a124d32009-06-14 11:45:27 +02001103 dev->netdev->trans_start = jiffies;
Stefan Richter110f82d2010-01-18 22:36:49 +01001104 out:
1105 if (free)
1106 fwnet_free_ptask(ptask);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001107
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001108 return 0;
1109}
1110
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001111static int fwnet_broadcast_start(struct fwnet_device *dev)
1112{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001113 struct fw_iso_context *context;
1114 int retval;
1115 unsigned num_packets;
1116 unsigned max_receive;
1117 struct fw_iso_packet packet;
1118 unsigned long offset;
1119 unsigned u;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001120
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001121 if (dev->local_fifo == FWNET_NO_FIFO_ADDR) {
1122 /* outside OHCI posted write area? */
1123 static const struct fw_address_region region = {
1124 .start = 0xffff00000000ULL,
1125 .end = CSR_REGISTER_BASE,
1126 };
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001127
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001128 dev->handler.length = 4096;
1129 dev->handler.address_callback = fwnet_receive_packet;
1130 dev->handler.callback_data = dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001131
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001132 retval = fw_core_add_address_handler(&dev->handler, &region);
1133 if (retval < 0)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001134 goto failed_initial;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001135
1136 dev->local_fifo = dev->handler.offset;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001137 }
1138
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001139 max_receive = 1U << (dev->card->max_receive + 1);
1140 num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive;
1141
1142 if (!dev->broadcast_rcv_context) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001143 void **ptrptr;
1144
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001145 context = fw_iso_context_create(dev->card,
1146 FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL,
1147 dev->card->link_speed, 8, fwnet_receive_broadcast, dev);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001148 if (IS_ERR(context)) {
1149 retval = PTR_ERR(context);
1150 goto failed_context_create;
1151 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001152
1153 retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer,
1154 dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
1155 if (retval < 0)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001156 goto failed_buffer_init;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001157
1158 ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL);
1159 if (!ptrptr) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001160 retval = -ENOMEM;
1161 goto failed_ptrs_alloc;
1162 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001163
1164 dev->broadcast_rcv_buffer_ptrs = ptrptr;
1165 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001166 void *ptr;
1167 unsigned v;
1168
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001169 ptr = kmap(dev->broadcast_rcv_buffer.pages[u]);
1170 for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++)
1171 *ptrptr++ = (void *)
1172 ((char *)ptr + v * max_receive);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001173 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001174 dev->broadcast_rcv_context = context;
1175 } else {
1176 context = dev->broadcast_rcv_context;
1177 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001178
1179 packet.payload_length = max_receive;
1180 packet.interrupt = 1;
1181 packet.skip = 0;
1182 packet.tag = 3;
1183 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001184 packet.header_length = IEEE1394_GASP_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001185 offset = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001186
1187 for (u = 0; u < num_packets; u++) {
1188 retval = fw_iso_context_queue(context, &packet,
1189 &dev->broadcast_rcv_buffer, offset);
1190 if (retval < 0)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001191 goto failed_rcv_queue;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001192
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001193 offset += max_receive;
1194 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001195 dev->num_broadcast_rcv_ptrs = num_packets;
1196 dev->rcv_buffer_size = max_receive;
1197 dev->broadcast_rcv_next_ptr = 0U;
1198 retval = fw_iso_context_start(context, -1, 0,
1199 FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
1200 if (retval < 0)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001201 goto failed_rcv_queue;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001202
1203 /* FIXME: adjust it according to the min. speed of all known peers? */
1204 dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
1205 - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE;
1206 dev->broadcast_state = FWNET_BROADCAST_RUNNING;
1207
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001208 return 0;
1209
1210 failed_rcv_queue:
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001211 kfree(dev->broadcast_rcv_buffer_ptrs);
1212 dev->broadcast_rcv_buffer_ptrs = NULL;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001213 failed_ptrs_alloc:
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001214 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001215 failed_buffer_init:
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001216 fw_iso_context_destroy(context);
1217 dev->broadcast_rcv_context = NULL;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001218 failed_context_create:
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001219 fw_core_remove_address_handler(&dev->handler);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001220 failed_initial:
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001221 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1222
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001223 return retval;
1224}
1225
Stefan Richterc1671472010-12-17 22:22:33 +01001226static void set_carrier_state(struct fwnet_device *dev)
1227{
1228 if (dev->peer_count > 1)
1229 netif_carrier_on(dev->netdev);
1230 else
1231 netif_carrier_off(dev->netdev);
1232}
1233
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001234/* ifup */
1235static int fwnet_open(struct net_device *net)
1236{
1237 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001238 int ret;
1239
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001240 if (dev->broadcast_state == FWNET_BROADCAST_ERROR) {
1241 ret = fwnet_broadcast_start(dev);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001242 if (ret)
1243 return ret;
1244 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001245 netif_start_queue(net);
1246
Stefan Richterc1671472010-12-17 22:22:33 +01001247 spin_lock_irq(&dev->lock);
1248 set_carrier_state(dev);
1249 spin_unlock_irq(&dev->lock);
1250
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001251 return 0;
1252}
1253
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001254/* ifdown */
1255static int fwnet_stop(struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001256{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001257 netif_stop_queue(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001258
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001259 /* Deallocate iso context for use by other applications? */
1260
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001261 return 0;
1262}
1263
Stephen Hemminger424efe92009-08-31 19:50:51 +00001264static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001265{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001266 struct fwnet_header hdr_buf;
1267 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001268 __be16 proto;
1269 u16 dest_node;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001270 unsigned max_payload;
1271 u16 dg_size;
1272 u16 *datagram_label_ptr;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001273 struct fwnet_packet_task *ptask;
Stefan Richter5a124d32009-06-14 11:45:27 +02001274 struct fwnet_peer *peer;
1275 unsigned long flags;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001276
Stefan Richterb2268832010-11-14 14:35:40 +01001277 spin_lock_irqsave(&dev->lock, flags);
1278
1279 /* Can this happen? */
1280 if (netif_queue_stopped(dev->netdev)) {
1281 spin_unlock_irqrestore(&dev->lock, flags);
1282
1283 return NETDEV_TX_BUSY;
1284 }
1285
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001286 ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001287 if (ptask == NULL)
1288 goto fail;
1289
1290 skb = skb_share_check(skb, GFP_ATOMIC);
1291 if (!skb)
1292 goto fail;
1293
1294 /*
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001295 * Make a copy of the driver-specific header.
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001296 * We might need to rebuild the header on tx failure.
1297 */
1298 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
1299 skb_pull(skb, sizeof(hdr_buf));
1300
1301 proto = hdr_buf.h_proto;
1302 dg_size = skb->len;
1303
1304 /*
1305 * Set the transmission type for the packet. ARP packets and IP
1306 * broadcast packets are sent via GASP.
1307 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001308 if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001309 || proto == htons(ETH_P_ARP)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001310 || (proto == htons(ETH_P_IP)
1311 && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001312 max_payload = dev->broadcast_xmt_max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001313 datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
1314
Stefan Richter5a124d32009-06-14 11:45:27 +02001315 ptask->fifo_addr = FWNET_NO_FIFO_ADDR;
1316 ptask->generation = 0;
1317 ptask->dest_node = IEEE1394_ALL_NODES;
1318 ptask->speed = SCODE_100;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001319 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001320 __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001321 u8 generation;
1322
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001323 peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid));
Stefan Richter5a124d32009-06-14 11:45:27 +02001324 if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR)
Stefan Richterb2268832010-11-14 14:35:40 +01001325 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001326
Stefan Richter5a124d32009-06-14 11:45:27 +02001327 generation = peer->generation;
1328 dest_node = peer->node_id;
1329 max_payload = peer->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001330 datagram_label_ptr = &peer->datagram_label;
1331
Stefan Richter5a124d32009-06-14 11:45:27 +02001332 ptask->fifo_addr = peer->fifo;
1333 ptask->generation = generation;
1334 ptask->dest_node = dest_node;
1335 ptask->speed = peer->speed;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001336 }
1337
1338 /* If this is an ARP packet, convert it */
1339 if (proto == htons(ETH_P_ARP)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001340 struct arphdr *arp = (struct arphdr *)skb->data;
1341 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001342 struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data;
1343 __be32 ipaddr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001344
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001345 ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN));
1346
1347 arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN;
1348 arp1394->max_rec = dev->card->max_receive;
1349 arp1394->sspd = dev->card->link_speed;
1350
1351 put_unaligned_be16(dev->local_fifo >> 32,
1352 &arp1394->fifo_hi);
1353 put_unaligned_be32(dev->local_fifo & 0xffffffff,
1354 &arp1394->fifo_lo);
1355 put_unaligned(ipaddr, &arp1394->sip);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001356 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001357
1358 ptask->hdr.w0 = 0;
1359 ptask->hdr.w1 = 0;
1360 ptask->skb = skb;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001361 ptask->dev = dev;
1362
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001363 /* Does it all fit in one packet? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001364 if (dg_size <= max_payload) {
1365 fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001366 ptask->outstanding_pkts = 1;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001367 max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001368 } else {
1369 u16 datagram_label;
1370
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001371 max_payload -= RFC2374_FRAG_OVERHEAD;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001372 datagram_label = (*datagram_label_ptr)++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001373 fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size,
1374 datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001375 ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001376 max_payload += RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001377 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001378
Stefan Richterb2268832010-11-14 14:35:40 +01001379 if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS)
1380 netif_stop_queue(dev->netdev);
Stefan Richter48553012010-11-06 23:18:23 +01001381
Stefan Richter5a124d32009-06-14 11:45:27 +02001382 spin_unlock_irqrestore(&dev->lock, flags);
1383
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001384 ptask->max_payload = max_payload;
Stefan Richter48553012010-11-06 23:18:23 +01001385 ptask->enqueued = 0;
Stefan Richter110f82d2010-01-18 22:36:49 +01001386
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001387 fwnet_send_packet(ptask);
1388
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001389 return NETDEV_TX_OK;
1390
1391 fail:
Stefan Richterb2268832010-11-14 14:35:40 +01001392 spin_unlock_irqrestore(&dev->lock, flags);
1393
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001394 if (ptask)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001395 kmem_cache_free(fwnet_packet_task_cache, ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001396
1397 if (skb != NULL)
1398 dev_kfree_skb(skb);
1399
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001400 net->stats.tx_dropped++;
1401 net->stats.tx_errors++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001402
1403 /*
1404 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1405 * causes serious problems" here, allegedly. Before that patch,
1406 * -ERRNO was returned which is not appropriate under Linux 2.6.
1407 * Perhaps more needs to be done? Stop the queue in serious
1408 * conditions and restart it elsewhere?
1409 */
1410 return NETDEV_TX_OK;
1411}
1412
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001413static int fwnet_change_mtu(struct net_device *net, int new_mtu)
1414{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001415 if (new_mtu < 68)
1416 return -EINVAL;
1417
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001418 net->mtu = new_mtu;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001419 return 0;
1420}
1421
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001422static const struct ethtool_ops fwnet_ethtool_ops = {
1423 .get_link = ethtool_op_get_link,
1424};
1425
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001426static const struct net_device_ops fwnet_netdev_ops = {
1427 .ndo_open = fwnet_open,
1428 .ndo_stop = fwnet_stop,
1429 .ndo_start_xmit = fwnet_tx,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001430 .ndo_change_mtu = fwnet_change_mtu,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001431};
1432
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001433static void fwnet_init_dev(struct net_device *net)
1434{
1435 net->header_ops = &fwnet_header_ops;
1436 net->netdev_ops = &fwnet_netdev_ops;
Stefan Richter1337f852009-06-14 11:47:44 +02001437 net->watchdog_timeo = 2 * HZ;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001438 net->flags = IFF_BROADCAST | IFF_MULTICAST;
1439 net->features = NETIF_F_HIGHDMA;
1440 net->addr_len = FWNET_ALEN;
1441 net->hard_header_len = FWNET_HLEN;
1442 net->type = ARPHRD_IEEE1394;
Stefan Richterb2268832010-11-14 14:35:40 +01001443 net->tx_queue_len = FWNET_TX_QUEUE_LEN;
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001444 net->ethtool_ops = &fwnet_ethtool_ops;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001445}
1446
Stefan Richter5a124d32009-06-14 11:45:27 +02001447/* caller must hold fwnet_device_mutex */
1448static struct fwnet_device *fwnet_dev_find(struct fw_card *card)
1449{
1450 struct fwnet_device *dev;
1451
1452 list_for_each_entry(dev, &fwnet_device_list, dev_link)
1453 if (dev->card == card)
1454 return dev;
1455
1456 return NULL;
1457}
1458
1459static int fwnet_add_peer(struct fwnet_device *dev,
1460 struct fw_unit *unit, struct fw_device *device)
1461{
1462 struct fwnet_peer *peer;
1463
1464 peer = kmalloc(sizeof(*peer), GFP_KERNEL);
1465 if (!peer)
1466 return -ENOMEM;
1467
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001468 dev_set_drvdata(&unit->device, peer);
1469
Stefan Richter5a124d32009-06-14 11:45:27 +02001470 peer->dev = dev;
1471 peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
1472 peer->fifo = FWNET_NO_FIFO_ADDR;
1473 INIT_LIST_HEAD(&peer->pd_list);
1474 peer->pdg_size = 0;
1475 peer->datagram_label = 0;
1476 peer->speed = device->max_speed;
1477 peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed);
1478
1479 peer->generation = device->generation;
1480 smp_rmb();
1481 peer->node_id = device->node_id;
1482
1483 spin_lock_irq(&dev->lock);
1484 list_add_tail(&peer->peer_link, &dev->peer_list);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001485 dev->peer_count++;
Stefan Richterc1671472010-12-17 22:22:33 +01001486 set_carrier_state(dev);
Stefan Richter5a124d32009-06-14 11:45:27 +02001487 spin_unlock_irq(&dev->lock);
1488
1489 return 0;
1490}
1491
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001492static int fwnet_probe(struct device *_dev)
1493{
1494 struct fw_unit *unit = fw_unit(_dev);
1495 struct fw_device *device = fw_parent_device(unit);
1496 struct fw_card *card = device->card;
1497 struct net_device *net;
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001498 bool allocated_netdev = false;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001499 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001500 unsigned max_mtu;
Stefan Richter5a124d32009-06-14 11:45:27 +02001501 int ret;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001502
Stefan Richter5a124d32009-06-14 11:45:27 +02001503 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001504
Stefan Richter5a124d32009-06-14 11:45:27 +02001505 dev = fwnet_dev_find(card);
1506 if (dev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001507 net = dev->netdev;
1508 goto have_dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001509 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001510
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001511 net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev);
1512 if (net == NULL) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001513 ret = -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001514 goto out;
1515 }
1516
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001517 allocated_netdev = true;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001518 SET_NETDEV_DEV(net, card->device);
1519 dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001520
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001521 spin_lock_init(&dev->lock);
1522 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1523 dev->broadcast_rcv_context = NULL;
1524 dev->broadcast_xmt_max_payload = 0;
1525 dev->broadcast_xmt_datagramlabel = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001526 dev->local_fifo = FWNET_NO_FIFO_ADDR;
Stefan Richter48553012010-11-06 23:18:23 +01001527 dev->queued_datagrams = 0;
Stefan Richter5a124d32009-06-14 11:45:27 +02001528 INIT_LIST_HEAD(&dev->peer_list);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001529 dev->card = card;
Stefan Richter5a124d32009-06-14 11:45:27 +02001530 dev->netdev = net;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001531
1532 /*
1533 * Use the RFC 2734 default 1500 octets or the maximum payload
1534 * as initial MTU
1535 */
1536 max_mtu = (1 << (card->max_receive + 1))
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001537 - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE;
1538 net->mtu = min(1500U, max_mtu);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001539
1540 /* Set our hardware address while we're at it */
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001541 put_unaligned_be64(card->guid, net->dev_addr);
1542 put_unaligned_be64(~0ULL, net->broadcast);
Stefan Richter5a124d32009-06-14 11:45:27 +02001543 ret = register_netdev(net);
1544 if (ret) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001545 fw_error("Cannot register the driver\n");
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001546 goto out;
1547 }
1548
Stefan Richter5a124d32009-06-14 11:45:27 +02001549 list_add_tail(&dev->dev_link, &fwnet_device_list);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001550 fw_notify("%s: IPv4 over FireWire on device %016llx\n",
1551 net->name, (unsigned long long)card->guid);
Stefan Richter5a124d32009-06-14 11:45:27 +02001552 have_dev:
1553 ret = fwnet_add_peer(dev, unit, device);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001554 if (ret && allocated_netdev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001555 unregister_netdev(net);
1556 list_del(&dev->dev_link);
1557 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001558 out:
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001559 if (ret && allocated_netdev)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001560 free_netdev(net);
1561
Stefan Richter5a124d32009-06-14 11:45:27 +02001562 mutex_unlock(&fwnet_device_mutex);
1563
1564 return ret;
1565}
1566
Stefan Richterc1671472010-12-17 22:22:33 +01001567static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev)
Stefan Richter5a124d32009-06-14 11:45:27 +02001568{
1569 struct fwnet_partial_datagram *pd, *pd_next;
1570
Stefan Richterc1671472010-12-17 22:22:33 +01001571 spin_lock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001572 list_del(&peer->peer_link);
Stefan Richterc1671472010-12-17 22:22:33 +01001573 dev->peer_count--;
1574 set_carrier_state(dev);
1575 spin_unlock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001576
1577 list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link)
1578 fwnet_pd_delete(pd);
1579
1580 kfree(peer);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001581}
1582
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001583static int fwnet_remove(struct device *_dev)
1584{
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001585 struct fwnet_peer *peer = dev_get_drvdata(_dev);
Stefan Richter5a124d32009-06-14 11:45:27 +02001586 struct fwnet_device *dev = peer->dev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001587 struct net_device *net;
Stefan Richter48553012010-11-06 23:18:23 +01001588 int i;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001589
Stefan Richter5a124d32009-06-14 11:45:27 +02001590 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001591
Stefan Richterc1671472010-12-17 22:22:33 +01001592 fwnet_remove_peer(peer, dev);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001593
Stefan Richter5a124d32009-06-14 11:45:27 +02001594 if (list_empty(&dev->peer_list)) {
1595 net = dev->netdev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001596 unregister_netdev(net);
1597
1598 if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
1599 fw_core_remove_address_handler(&dev->handler);
1600 if (dev->broadcast_rcv_context) {
1601 fw_iso_context_stop(dev->broadcast_rcv_context);
1602 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer,
1603 dev->card);
1604 fw_iso_context_destroy(dev->broadcast_rcv_context);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001605 }
Stefan Richter48553012010-11-06 23:18:23 +01001606 for (i = 0; dev->queued_datagrams && i < 5; i++)
1607 ssleep(1);
1608 WARN_ON(dev->queued_datagrams);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001609 list_del(&dev->dev_link);
1610
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001611 free_netdev(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001612 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001613
Stefan Richter5a124d32009-06-14 11:45:27 +02001614 mutex_unlock(&fwnet_device_mutex);
1615
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001616 return 0;
1617}
1618
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001619/*
1620 * FIXME abort partially sent fragmented datagrams,
1621 * discard partially received fragmented datagrams
1622 */
1623static void fwnet_update(struct fw_unit *unit)
1624{
1625 struct fw_device *device = fw_parent_device(unit);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001626 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
Stefan Richter5a124d32009-06-14 11:45:27 +02001627 int generation;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001628
Stefan Richter5a124d32009-06-14 11:45:27 +02001629 generation = device->generation;
1630
1631 spin_lock_irq(&peer->dev->lock);
1632 peer->node_id = device->node_id;
1633 peer->generation = generation;
1634 spin_unlock_irq(&peer->dev->lock);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001635}
1636
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001637static const struct ieee1394_device_id fwnet_id_table[] = {
1638 {
1639 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1640 IEEE1394_MATCH_VERSION,
1641 .specifier_id = IANA_SPECIFIER_ID,
1642 .version = RFC2734_SW_VERSION,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001643 },
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001644 { }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001645};
1646
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001647static struct fw_driver fwnet_driver = {
1648 .driver = {
1649 .owner = THIS_MODULE,
1650 .name = "net",
1651 .bus = &fw_bus_type,
1652 .probe = fwnet_probe,
1653 .remove = fwnet_remove,
1654 },
1655 .update = fwnet_update,
1656 .id_table = fwnet_id_table,
1657};
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001658
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001659static const u32 rfc2374_unit_directory_data[] = {
1660 0x00040000, /* directory_length */
1661 0x1200005e, /* unit_specifier_id: IANA */
1662 0x81000003, /* textual descriptor offset */
1663 0x13000001, /* unit_sw_version: RFC 2734 */
1664 0x81000005, /* textual descriptor offset */
1665 0x00030000, /* descriptor_length */
1666 0x00000000, /* text */
1667 0x00000000, /* minimal ASCII, en */
1668 0x49414e41, /* I A N A */
1669 0x00030000, /* descriptor_length */
1670 0x00000000, /* text */
1671 0x00000000, /* minimal ASCII, en */
1672 0x49507634, /* I P v 4 */
1673};
1674
1675static struct fw_descriptor rfc2374_unit_directory = {
1676 .length = ARRAY_SIZE(rfc2374_unit_directory_data),
1677 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1678 .data = rfc2374_unit_directory_data
1679};
1680
1681static int __init fwnet_init(void)
1682{
1683 int err;
1684
1685 err = fw_core_add_descriptor(&rfc2374_unit_directory);
1686 if (err)
1687 return err;
1688
1689 fwnet_packet_task_cache = kmem_cache_create("packet_task",
1690 sizeof(struct fwnet_packet_task), 0, 0, NULL);
1691 if (!fwnet_packet_task_cache) {
1692 err = -ENOMEM;
1693 goto out;
1694 }
1695
1696 err = driver_register(&fwnet_driver.driver);
1697 if (!err)
1698 return 0;
1699
1700 kmem_cache_destroy(fwnet_packet_task_cache);
1701out:
1702 fw_core_remove_descriptor(&rfc2374_unit_directory);
1703
1704 return err;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001705}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001706module_init(fwnet_init);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001707
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001708static void __exit fwnet_cleanup(void)
1709{
1710 driver_unregister(&fwnet_driver.driver);
1711 kmem_cache_destroy(fwnet_packet_task_cache);
1712 fw_core_remove_descriptor(&rfc2374_unit_directory);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001713}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001714module_exit(fwnet_cleanup);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001715
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001716MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
1717MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734");
1718MODULE_LICENSE("GPL");
1719MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table);