Commit | Line | Data |
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c76acec6 JF |
1 | /* |
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 | ||
f91e3bd8 | 9 | #include <linux/bug.h> |
c76acec6 JF |
10 | #include <linux/device.h> |
11 | #include <linux/ethtool.h> | |
12 | #include <linux/firewire.h> | |
13 | #include <linux/firewire-constants.h> | |
14 | #include <linux/highmem.h> | |
15 | #include <linux/in.h> | |
16 | #include <linux/ip.h> | |
f91e3bd8 | 17 | #include <linux/jiffies.h> |
c76acec6 JF |
18 | #include <linux/mod_devicetable.h> |
19 | #include <linux/module.h> | |
20 | #include <linux/moduleparam.h> | |
5a124d38 | 21 | #include <linux/mutex.h> |
c76acec6 JF |
22 | #include <linux/netdevice.h> |
23 | #include <linux/skbuff.h> | |
5a124d38 | 24 | #include <linux/spinlock.h> |
c76acec6 JF |
25 | |
26 | #include <asm/unaligned.h> | |
27 | #include <net/arp.h> | |
28 | ||
f91e3bd8 SR |
29 | #define FWNET_MAX_FRAGMENTS 25 /* arbitrary limit */ |
30 | #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16 * 1024 ? 4 : 2) | |
c76acec6 | 31 | |
f91e3bd8 SR |
32 | #define IEEE1394_BROADCAST_CHANNEL 31 |
33 | #define IEEE1394_ALL_NODES (0xffc0 | 0x003f) | |
34 | #define IEEE1394_MAX_PAYLOAD_S100 512 | |
35 | #define FWNET_NO_FIFO_ADDR (~0ULL) | |
c76acec6 | 36 | |
f91e3bd8 SR |
37 | #define IANA_SPECIFIER_ID 0x00005eU |
38 | #define RFC2734_SW_VERSION 0x000001U | |
c76acec6 | 39 | |
f91e3bd8 | 40 | #define IEEE1394_GASP_HDR_SIZE 8 |
c76acec6 | 41 | |
f91e3bd8 SR |
42 | #define RFC2374_UNFRAG_HDR_SIZE 4 |
43 | #define RFC2374_FRAG_HDR_SIZE 8 | |
44 | #define RFC2374_FRAG_OVERHEAD 4 | |
c76acec6 | 45 | |
f91e3bd8 SR |
46 | #define RFC2374_HDR_UNFRAG 0 /* unfragmented */ |
47 | #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */ | |
48 | #define RFC2374_HDR_LASTFRAG 2 /* last fragment */ | |
49 | #define RFC2374_HDR_INTFRAG 3 /* interior fragment */ | |
c76acec6 | 50 | |
f91e3bd8 | 51 | #define RFC2734_HW_ADDR_LEN 16 |
c76acec6 | 52 | |
f91e3bd8 SR |
53 | struct rfc2734_arp { |
54 | __be16 hw_type; /* 0x0018 */ | |
55 | __be16 proto_type; /* 0x0806 */ | |
56 | u8 hw_addr_len; /* 16 */ | |
57 | u8 ip_addr_len; /* 4 */ | |
58 | __be16 opcode; /* ARP Opcode */ | |
59 | /* Above is exactly the same format as struct arphdr */ | |
c76acec6 | 60 | |
f91e3bd8 SR |
61 | __be64 s_uniq_id; /* Sender's 64bit EUI */ |
62 | u8 max_rec; /* Sender's max packet size */ | |
63 | u8 sspd; /* Sender's max speed */ | |
64 | __be16 fifo_hi; /* hi 16bits of sender's FIFO addr */ | |
65 | __be32 fifo_lo; /* lo 32bits of sender's FIFO addr */ | |
66 | __be32 sip; /* Sender's IP Address */ | |
67 | __be32 tip; /* IP Address of requested hw addr */ | |
68 | } __attribute__((packed)); | |
c76acec6 | 69 | |
f91e3bd8 SR |
70 | /* This header format is specific to this driver implementation. */ |
71 | #define FWNET_ALEN 8 | |
72 | #define FWNET_HLEN 10 | |
73 | struct fwnet_header { | |
74 | u8 h_dest[FWNET_ALEN]; /* destination address */ | |
75 | __be16 h_proto; /* packet type ID field */ | |
76 | } __attribute__((packed)); | |
c76acec6 | 77 | |
f91e3bd8 SR |
78 | /* IPv4 and IPv6 encapsulation header */ |
79 | struct rfc2734_header { | |
c76acec6 JF |
80 | u32 w0; |
81 | u32 w1; | |
82 | }; | |
83 | ||
f91e3bd8 SR |
84 | #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) |
85 | #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) | |
86 | #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16) | |
87 | #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) | |
88 | #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) | |
c76acec6 | 89 | |
f91e3bd8 SR |
90 | #define fwnet_set_hdr_lf(lf) ((lf) << 30) |
91 | #define fwnet_set_hdr_ether_type(et) (et) | |
92 | #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16) | |
93 | #define fwnet_set_hdr_fg_off(fgo) (fgo) | |
c76acec6 | 94 | |
f91e3bd8 | 95 | #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) |
c76acec6 | 96 | |
f91e3bd8 SR |
97 | static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, |
98 | unsigned ether_type) | |
99 | { | |
100 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) | |
101 | | fwnet_set_hdr_ether_type(ether_type); | |
102 | } | |
c76acec6 | 103 | |
f91e3bd8 SR |
104 | static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, |
105 | unsigned ether_type, unsigned dg_size, unsigned dgl) | |
106 | { | |
107 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) | |
108 | | fwnet_set_hdr_dg_size(dg_size) | |
109 | | fwnet_set_hdr_ether_type(ether_type); | |
110 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
111 | } | |
c76acec6 | 112 | |
f91e3bd8 SR |
113 | static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, |
114 | unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) | |
115 | { | |
116 | hdr->w0 = fwnet_set_hdr_lf(lf) | |
117 | | fwnet_set_hdr_dg_size(dg_size) | |
118 | | fwnet_set_hdr_fg_off(fg_off); | |
119 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
120 | } | |
c76acec6 JF |
121 | |
122 | /* This list keeps track of what parts of the datagram have been filled in */ | |
f91e3bd8 SR |
123 | struct fwnet_fragment_info { |
124 | struct list_head fi_link; | |
c76acec6 JF |
125 | u16 offset; |
126 | u16 len; | |
127 | }; | |
128 | ||
f91e3bd8 SR |
129 | struct fwnet_partial_datagram { |
130 | struct list_head pd_link; | |
131 | struct list_head fi_list; | |
c76acec6 JF |
132 | struct sk_buff *skb; |
133 | /* FIXME Why not use skb->data? */ | |
134 | char *pbuf; | |
135 | u16 datagram_label; | |
136 | u16 ether_type; | |
137 | u16 datagram_size; | |
138 | }; | |
139 | ||
5a124d38 SR |
140 | static DEFINE_MUTEX(fwnet_device_mutex); |
141 | static LIST_HEAD(fwnet_device_list); | |
c76acec6 | 142 | |
f91e3bd8 | 143 | struct fwnet_device { |
5a124d38 | 144 | struct list_head dev_link; |
c76acec6 | 145 | spinlock_t lock; |
f91e3bd8 SR |
146 | enum { |
147 | FWNET_BROADCAST_ERROR, | |
148 | FWNET_BROADCAST_RUNNING, | |
149 | FWNET_BROADCAST_STOPPED, | |
150 | } broadcast_state; | |
c76acec6 JF |
151 | struct fw_iso_context *broadcast_rcv_context; |
152 | struct fw_iso_buffer broadcast_rcv_buffer; | |
153 | void **broadcast_rcv_buffer_ptrs; | |
154 | unsigned broadcast_rcv_next_ptr; | |
155 | unsigned num_broadcast_rcv_ptrs; | |
156 | unsigned rcv_buffer_size; | |
157 | /* | |
158 | * This value is the maximum unfragmented datagram size that can be | |
159 | * sent by the hardware. It already has the GASP overhead and the | |
160 | * unfragmented datagram header overhead calculated into it. | |
161 | */ | |
162 | unsigned broadcast_xmt_max_payload; | |
163 | u16 broadcast_xmt_datagramlabel; | |
164 | ||
165 | /* | |
f91e3bd8 | 166 | * The CSR address that remote nodes must send datagrams to for us to |
c76acec6 JF |
167 | * receive them. |
168 | */ | |
169 | struct fw_address_handler handler; | |
170 | u64 local_fifo; | |
171 | ||
c76acec6 JF |
172 | /* List of packets to be sent */ |
173 | struct list_head packet_list; | |
174 | /* | |
175 | * List of packets that were broadcasted. When we get an ISO interrupt | |
176 | * one of them has been sent | |
177 | */ | |
178 | struct list_head broadcasted_list; | |
179 | /* List of packets that have been sent but not yet acked */ | |
180 | struct list_head sent_list; | |
181 | ||
5a124d38 | 182 | struct list_head peer_list; |
c76acec6 | 183 | struct fw_card *card; |
5a124d38 SR |
184 | struct net_device *netdev; |
185 | }; | |
186 | ||
187 | struct fwnet_peer { | |
188 | struct list_head peer_link; | |
189 | struct fwnet_device *dev; | |
190 | u64 guid; | |
191 | u64 fifo; | |
192 | ||
193 | /* guarded by dev->lock */ | |
194 | struct list_head pd_list; /* received partial datagrams */ | |
195 | unsigned pdg_size; /* pd_list size */ | |
196 | ||
197 | u16 datagram_label; /* outgoing datagram label */ | |
198 | unsigned max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ | |
199 | int node_id; | |
200 | int generation; | |
201 | unsigned speed; | |
c76acec6 JF |
202 | }; |
203 | ||
204 | /* This is our task struct. It's used for the packet complete callback. */ | |
f91e3bd8 | 205 | struct fwnet_packet_task { |
c76acec6 | 206 | /* |
f91e3bd8 SR |
207 | * ptask can actually be on dev->packet_list, dev->broadcasted_list, |
208 | * or dev->sent_list depending on its current state. | |
c76acec6 | 209 | */ |
f91e3bd8 | 210 | struct list_head pt_link; |
c76acec6 | 211 | struct fw_transaction transaction; |
f91e3bd8 | 212 | struct rfc2734_header hdr; |
c76acec6 | 213 | struct sk_buff *skb; |
f91e3bd8 SR |
214 | struct fwnet_device *dev; |
215 | ||
c76acec6 JF |
216 | int outstanding_pkts; |
217 | unsigned max_payload; | |
218 | u64 fifo_addr; | |
219 | u16 dest_node; | |
220 | u8 generation; | |
221 | u8 speed; | |
222 | }; | |
223 | ||
f91e3bd8 SR |
224 | /* |
225 | * saddr == NULL means use device source address. | |
226 | * daddr == NULL means leave destination address (eg unresolved arp). | |
227 | */ | |
228 | static int fwnet_header_create(struct sk_buff *skb, struct net_device *net, | |
229 | unsigned short type, const void *daddr, | |
230 | const void *saddr, unsigned len) | |
231 | { | |
232 | struct fwnet_header *h; | |
c76acec6 | 233 | |
f91e3bd8 SR |
234 | h = (struct fwnet_header *)skb_push(skb, sizeof(*h)); |
235 | put_unaligned_be16(type, &h->h_proto); | |
c76acec6 | 236 | |
f91e3bd8 SR |
237 | if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
238 | memset(h->h_dest, 0, net->addr_len); | |
c76acec6 | 239 | |
f91e3bd8 | 240 | return net->hard_header_len; |
c76acec6 JF |
241 | } |
242 | ||
243 | if (daddr) { | |
f91e3bd8 SR |
244 | memcpy(h->h_dest, daddr, net->addr_len); |
245 | ||
246 | return net->hard_header_len; | |
c76acec6 JF |
247 | } |
248 | ||
f91e3bd8 | 249 | return -net->hard_header_len; |
c76acec6 JF |
250 | } |
251 | ||
f91e3bd8 | 252 | static int fwnet_header_rebuild(struct sk_buff *skb) |
c76acec6 | 253 | { |
f91e3bd8 | 254 | struct fwnet_header *h = (struct fwnet_header *)skb->data; |
c76acec6 | 255 | |
f91e3bd8 SR |
256 | if (get_unaligned_be16(&h->h_proto) == ETH_P_IP) |
257 | return arp_find((unsigned char *)&h->h_dest, skb); | |
c76acec6 | 258 | |
f91e3bd8 SR |
259 | fw_notify("%s: unable to resolve type %04x addresses\n", |
260 | skb->dev->name, be16_to_cpu(h->h_proto)); | |
c76acec6 JF |
261 | return 0; |
262 | } | |
263 | ||
f91e3bd8 SR |
264 | static int fwnet_header_cache(const struct neighbour *neigh, |
265 | struct hh_cache *hh) | |
266 | { | |
267 | struct net_device *net; | |
268 | struct fwnet_header *h; | |
c76acec6 | 269 | |
f91e3bd8 | 270 | if (hh->hh_type == cpu_to_be16(ETH_P_802_3)) |
c76acec6 | 271 | return -1; |
f91e3bd8 SR |
272 | net = neigh->dev; |
273 | h = (struct fwnet_header *)((u8 *)hh->hh_data + 16 - sizeof(*h)); | |
274 | h->h_proto = hh->hh_type; | |
275 | memcpy(h->h_dest, neigh->ha, net->addr_len); | |
276 | hh->hh_len = FWNET_HLEN; | |
c76acec6 | 277 | |
c76acec6 JF |
278 | return 0; |
279 | } | |
280 | ||
281 | /* Called by Address Resolution module to notify changes in address. */ | |
f91e3bd8 SR |
282 | static void fwnet_header_cache_update(struct hh_cache *hh, |
283 | const struct net_device *net, const unsigned char *haddr) | |
284 | { | |
285 | memcpy((u8 *)hh->hh_data + 16 - FWNET_HLEN, haddr, net->addr_len); | |
c76acec6 JF |
286 | } |
287 | ||
f91e3bd8 SR |
288 | static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
289 | { | |
290 | memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN); | |
291 | ||
292 | return FWNET_ALEN; | |
c76acec6 JF |
293 | } |
294 | ||
f91e3bd8 SR |
295 | static const struct header_ops fwnet_header_ops = { |
296 | .create = fwnet_header_create, | |
297 | .rebuild = fwnet_header_rebuild, | |
298 | .cache = fwnet_header_cache, | |
299 | .cache_update = fwnet_header_cache_update, | |
300 | .parse = fwnet_header_parse, | |
c76acec6 JF |
301 | }; |
302 | ||
c76acec6 | 303 | /* FIXME: is this correct for all cases? */ |
f91e3bd8 SR |
304 | static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd, |
305 | unsigned offset, unsigned len) | |
c76acec6 | 306 | { |
f91e3bd8 | 307 | struct fwnet_fragment_info *fi; |
c76acec6 JF |
308 | unsigned end = offset + len; |
309 | ||
f91e3bd8 SR |
310 | list_for_each_entry(fi, &pd->fi_list, fi_link) |
311 | if (offset < fi->offset + fi->len && end > fi->offset) | |
c76acec6 | 312 | return true; |
f91e3bd8 | 313 | |
c76acec6 JF |
314 | return false; |
315 | } | |
316 | ||
317 | /* Assumes that new fragment does not overlap any existing fragments */ | |
f91e3bd8 SR |
318 | static struct fwnet_fragment_info *fwnet_frag_new( |
319 | struct fwnet_partial_datagram *pd, unsigned offset, unsigned len) | |
320 | { | |
321 | struct fwnet_fragment_info *fi, *fi2, *new; | |
c76acec6 JF |
322 | struct list_head *list; |
323 | ||
f91e3bd8 SR |
324 | list = &pd->fi_list; |
325 | list_for_each_entry(fi, &pd->fi_list, fi_link) { | |
c76acec6 JF |
326 | if (fi->offset + fi->len == offset) { |
327 | /* The new fragment can be tacked on to the end */ | |
328 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
329 | fi2 = list_entry(fi->fi_link.next, |
330 | struct fwnet_fragment_info, fi_link); | |
c76acec6 | 331 | if (fi->offset + fi->len == fi2->offset) { |
c76acec6 JF |
332 | /* glue fragments together */ |
333 | fi->len += len + fi2->len; | |
f91e3bd8 | 334 | list_del(&fi2->fi_link); |
c76acec6 JF |
335 | kfree(fi2); |
336 | } else { | |
c76acec6 JF |
337 | fi->len += len; |
338 | } | |
f91e3bd8 | 339 | |
c76acec6 JF |
340 | return fi; |
341 | } | |
342 | if (offset + len == fi->offset) { | |
343 | /* The new fragment can be tacked on to the beginning */ | |
344 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
345 | fi2 = list_entry(fi->fi_link.prev, |
346 | struct fwnet_fragment_info, fi_link); | |
c76acec6 JF |
347 | if (fi2->offset + fi2->len == fi->offset) { |
348 | /* glue fragments together */ | |
c76acec6 | 349 | fi2->len += fi->len + len; |
f91e3bd8 | 350 | list_del(&fi->fi_link); |
c76acec6 | 351 | kfree(fi); |
f91e3bd8 | 352 | |
c76acec6 JF |
353 | return fi2; |
354 | } | |
c76acec6 JF |
355 | fi->offset = offset; |
356 | fi->len += len; | |
f91e3bd8 | 357 | |
c76acec6 JF |
358 | return fi; |
359 | } | |
360 | if (offset > fi->offset + fi->len) { | |
f91e3bd8 | 361 | list = &fi->fi_link; |
c76acec6 JF |
362 | break; |
363 | } | |
364 | if (offset + len < fi->offset) { | |
f91e3bd8 | 365 | list = fi->fi_link.prev; |
c76acec6 JF |
366 | break; |
367 | } | |
368 | } | |
369 | ||
370 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
371 | if (!new) { | |
f91e3bd8 | 372 | fw_error("out of memory\n"); |
c76acec6 JF |
373 | return NULL; |
374 | } | |
375 | ||
376 | new->offset = offset; | |
377 | new->len = len; | |
f91e3bd8 SR |
378 | list_add(&new->fi_link, list); |
379 | ||
c76acec6 JF |
380 | return new; |
381 | } | |
382 | ||
f91e3bd8 SR |
383 | static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net, |
384 | struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size, | |
385 | void *frag_buf, unsigned frag_off, unsigned frag_len) | |
386 | { | |
387 | struct fwnet_partial_datagram *new; | |
388 | struct fwnet_fragment_info *fi; | |
c76acec6 JF |
389 | |
390 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
391 | if (!new) | |
392 | goto fail; | |
f91e3bd8 SR |
393 | |
394 | INIT_LIST_HEAD(&new->fi_list); | |
395 | fi = fwnet_frag_new(new, frag_off, frag_len); | |
396 | if (fi == NULL) | |
c76acec6 | 397 | goto fail_w_new; |
f91e3bd8 | 398 | |
c76acec6 JF |
399 | new->datagram_label = datagram_label; |
400 | new->datagram_size = dg_size; | |
f91e3bd8 SR |
401 | new->skb = dev_alloc_skb(dg_size + net->hard_header_len + 15); |
402 | if (new->skb == NULL) | |
c76acec6 | 403 | goto fail_w_fi; |
f91e3bd8 SR |
404 | |
405 | skb_reserve(new->skb, (net->hard_header_len + 15) & ~15); | |
c76acec6 JF |
406 | new->pbuf = skb_put(new->skb, dg_size); |
407 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
f91e3bd8 SR |
408 | list_add_tail(&new->pd_link, &peer->pd_list); |
409 | ||
c76acec6 JF |
410 | return new; |
411 | ||
412 | fail_w_fi: | |
413 | kfree(fi); | |
414 | fail_w_new: | |
415 | kfree(new); | |
416 | fail: | |
f91e3bd8 SR |
417 | fw_error("out of memory\n"); |
418 | ||
c76acec6 JF |
419 | return NULL; |
420 | } | |
421 | ||
f91e3bd8 SR |
422 | static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer, |
423 | u16 datagram_label) | |
424 | { | |
425 | struct fwnet_partial_datagram *pd; | |
c76acec6 | 426 | |
f91e3bd8 SR |
427 | list_for_each_entry(pd, &peer->pd_list, pd_link) |
428 | if (pd->datagram_label == datagram_label) | |
c76acec6 | 429 | return pd; |
f91e3bd8 | 430 | |
c76acec6 JF |
431 | return NULL; |
432 | } | |
433 | ||
434 | ||
f91e3bd8 SR |
435 | static void fwnet_pd_delete(struct fwnet_partial_datagram *old) |
436 | { | |
437 | struct fwnet_fragment_info *fi, *n; | |
c76acec6 | 438 | |
f91e3bd8 | 439 | list_for_each_entry_safe(fi, n, &old->fi_list, fi_link) |
c76acec6 | 440 | kfree(fi); |
f91e3bd8 SR |
441 | |
442 | list_del(&old->pd_link); | |
c76acec6 JF |
443 | dev_kfree_skb_any(old->skb); |
444 | kfree(old); | |
445 | } | |
446 | ||
f91e3bd8 SR |
447 | static bool fwnet_pd_update(struct fwnet_peer *peer, |
448 | struct fwnet_partial_datagram *pd, void *frag_buf, | |
449 | unsigned frag_off, unsigned frag_len) | |
450 | { | |
451 | if (fwnet_frag_new(pd, frag_off, frag_len) == NULL) | |
c76acec6 | 452 | return false; |
f91e3bd8 | 453 | |
c76acec6 JF |
454 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
455 | ||
456 | /* | |
457 | * Move list entry to beginnig of list so that oldest partial | |
458 | * datagrams percolate to the end of the list | |
459 | */ | |
f91e3bd8 SR |
460 | list_move_tail(&pd->pd_link, &peer->pd_list); |
461 | ||
c76acec6 JF |
462 | return true; |
463 | } | |
464 | ||
f91e3bd8 SR |
465 | static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd) |
466 | { | |
467 | struct fwnet_fragment_info *fi; | |
c76acec6 | 468 | |
f91e3bd8 | 469 | fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link); |
c76acec6 | 470 | |
f91e3bd8 | 471 | return fi->len == pd->datagram_size; |
c76acec6 JF |
472 | } |
473 | ||
5a124d38 | 474 | /* caller must hold dev->lock */ |
f91e3bd8 SR |
475 | static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev, |
476 | u64 guid) | |
477 | { | |
5a124d38 | 478 | struct fwnet_peer *peer; |
c76acec6 | 479 | |
5a124d38 SR |
480 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
481 | if (peer->guid == guid) | |
482 | return peer; | |
c76acec6 | 483 | |
5a124d38 | 484 | return NULL; |
c76acec6 JF |
485 | } |
486 | ||
5a124d38 | 487 | /* caller must hold dev->lock */ |
f91e3bd8 | 488 | static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev, |
5a124d38 | 489 | int node_id, int generation) |
f91e3bd8 | 490 | { |
5a124d38 | 491 | struct fwnet_peer *peer; |
c76acec6 | 492 | |
5a124d38 SR |
493 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
494 | if (peer->node_id == node_id && | |
495 | peer->generation == generation) | |
496 | return peer; | |
f91e3bd8 | 497 | |
5a124d38 | 498 | return NULL; |
c76acec6 JF |
499 | } |
500 | ||
5a124d38 SR |
501 | /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */ |
502 | static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed) | |
f91e3bd8 | 503 | { |
5a124d38 SR |
504 | max_rec = min(max_rec, speed + 8); |
505 | max_rec = min(max_rec, 0xbU); /* <= 4096 */ | |
506 | if (max_rec < 8) { | |
507 | fw_notify("max_rec %x out of range\n", max_rec); | |
508 | max_rec = 8; | |
c76acec6 | 509 | } |
5a124d38 SR |
510 | |
511 | return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; | |
c76acec6 JF |
512 | } |
513 | ||
5a124d38 | 514 | |
f91e3bd8 SR |
515 | static int fwnet_finish_incoming_packet(struct net_device *net, |
516 | struct sk_buff *skb, u16 source_node_id, | |
517 | bool is_broadcast, u16 ether_type) | |
518 | { | |
519 | struct fwnet_device *dev; | |
520 | static const __be64 broadcast_hw = cpu_to_be64(~0ULL); | |
c76acec6 | 521 | int status; |
f91e3bd8 | 522 | __be64 guid; |
c76acec6 | 523 | |
f91e3bd8 | 524 | dev = netdev_priv(net); |
c76acec6 | 525 | /* Write metadata, and then pass to the receive level */ |
f91e3bd8 | 526 | skb->dev = net; |
c76acec6 JF |
527 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ |
528 | ||
529 | /* | |
530 | * Parse the encapsulation header. This actually does the job of | |
531 | * converting to an ethernet frame header, as well as arp | |
532 | * conversion if needed. ARP conversion is easier in this | |
533 | * direction, since we are using ethernet as our backend. | |
534 | */ | |
535 | /* | |
536 | * If this is an ARP packet, convert it. First, we want to make | |
537 | * use of some of the fields, since they tell us a little bit | |
538 | * about the sending machine. | |
539 | */ | |
540 | if (ether_type == ETH_P_ARP) { | |
f91e3bd8 | 541 | struct rfc2734_arp *arp1394; |
c76acec6 JF |
542 | struct arphdr *arp; |
543 | unsigned char *arp_ptr; | |
544 | u64 fifo_addr; | |
f91e3bd8 | 545 | u64 peer_guid; |
5a124d38 | 546 | unsigned sspd; |
c76acec6 | 547 | u16 max_payload; |
f91e3bd8 | 548 | struct fwnet_peer *peer; |
5a124d38 SR |
549 | unsigned long flags; |
550 | ||
551 | arp1394 = (struct rfc2734_arp *)skb->data; | |
552 | arp = (struct arphdr *)skb->data; | |
553 | arp_ptr = (unsigned char *)(arp + 1); | |
554 | peer_guid = get_unaligned_be64(&arp1394->s_uniq_id); | |
555 | fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32 | |
556 | | get_unaligned_be32(&arp1394->fifo_lo); | |
c76acec6 | 557 | |
c76acec6 | 558 | sspd = arp1394->sspd; |
f91e3bd8 SR |
559 | /* Sanity check. OS X 10.3 PPC reportedly sends 131. */ |
560 | if (sspd > SCODE_3200) { | |
561 | fw_notify("sspd %x out of range\n", sspd); | |
5a124d38 | 562 | sspd = SCODE_3200; |
c76acec6 | 563 | } |
5a124d38 | 564 | max_payload = fwnet_max_payload(arp1394->max_rec, sspd); |
c76acec6 | 565 | |
5a124d38 | 566 | spin_lock_irqsave(&dev->lock, flags); |
f91e3bd8 | 567 | peer = fwnet_peer_find_by_guid(dev, peer_guid); |
5a124d38 SR |
568 | if (peer) { |
569 | peer->fifo = fifo_addr; | |
570 | ||
571 | if (peer->speed > sspd) | |
572 | peer->speed = sspd; | |
573 | if (peer->max_payload > max_payload) | |
574 | peer->max_payload = max_payload; | |
575 | } | |
576 | spin_unlock_irqrestore(&dev->lock, flags); | |
577 | ||
f91e3bd8 SR |
578 | if (!peer) { |
579 | fw_notify("No peer for ARP packet from %016llx\n", | |
580 | (unsigned long long)peer_guid); | |
c76acec6 JF |
581 | goto failed_proto; |
582 | } | |
f91e3bd8 | 583 | |
c76acec6 JF |
584 | /* |
585 | * Now that we're done with the 1394 specific stuff, we'll | |
586 | * need to alter some of the data. Believe it or not, all | |
587 | * that needs to be done is sender_IP_address needs to be | |
588 | * moved, the destination hardware address get stuffed | |
589 | * in and the hardware address length set to 8. | |
590 | * | |
591 | * IMPORTANT: The code below overwrites 1394 specific data | |
592 | * needed above so keep the munging of the data for the | |
593 | * higher level IP stack last. | |
594 | */ | |
595 | ||
596 | arp->ar_hln = 8; | |
f91e3bd8 SR |
597 | /* skip over sender unique id */ |
598 | arp_ptr += arp->ar_hln; | |
599 | /* move sender IP addr */ | |
600 | put_unaligned(arp1394->sip, (u32 *)arp_ptr); | |
601 | /* skip over sender IP addr */ | |
602 | arp_ptr += arp->ar_pln; | |
c76acec6 JF |
603 | |
604 | if (arp->ar_op == htons(ARPOP_REQUEST)) | |
605 | memset(arp_ptr, 0, sizeof(u64)); | |
606 | else | |
f91e3bd8 | 607 | memcpy(arp_ptr, net->dev_addr, sizeof(u64)); |
c76acec6 JF |
608 | } |
609 | ||
610 | /* Now add the ethernet header. */ | |
f91e3bd8 SR |
611 | guid = cpu_to_be64(dev->card->guid); |
612 | if (dev_hard_header(skb, net, ether_type, | |
613 | is_broadcast ? &broadcast_hw : &guid, | |
614 | NULL, skb->len) >= 0) { | |
615 | struct fwnet_header *eth; | |
c76acec6 JF |
616 | u16 *rawp; |
617 | __be16 protocol; | |
618 | ||
619 | skb_reset_mac_header(skb); | |
620 | skb_pull(skb, sizeof(*eth)); | |
f91e3bd8 | 621 | eth = (struct fwnet_header *)skb_mac_header(skb); |
c76acec6 | 622 | if (*eth->h_dest & 1) { |
f91e3bd8 SR |
623 | if (memcmp(eth->h_dest, net->broadcast, |
624 | net->addr_len) == 0) | |
c76acec6 | 625 | skb->pkt_type = PACKET_BROADCAST; |
c76acec6 JF |
626 | #if 0 |
627 | else | |
628 | skb->pkt_type = PACKET_MULTICAST; | |
629 | #endif | |
630 | } else { | |
156ce867 | 631 | if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) |
c76acec6 | 632 | skb->pkt_type = PACKET_OTHERHOST; |
c76acec6 JF |
633 | } |
634 | if (ntohs(eth->h_proto) >= 1536) { | |
c76acec6 JF |
635 | protocol = eth->h_proto; |
636 | } else { | |
637 | rawp = (u16 *)skb->data; | |
f91e3bd8 | 638 | if (*rawp == 0xffff) |
c76acec6 | 639 | protocol = htons(ETH_P_802_3); |
f91e3bd8 | 640 | else |
c76acec6 | 641 | protocol = htons(ETH_P_802_2); |
c76acec6 JF |
642 | } |
643 | skb->protocol = protocol; | |
644 | } | |
645 | status = netif_rx(skb); | |
f91e3bd8 SR |
646 | if (status == NET_RX_DROP) { |
647 | net->stats.rx_errors++; | |
648 | net->stats.rx_dropped++; | |
c76acec6 | 649 | } else { |
f91e3bd8 SR |
650 | net->stats.rx_packets++; |
651 | net->stats.rx_bytes += skb->len; | |
c76acec6 | 652 | } |
f91e3bd8 SR |
653 | if (netif_queue_stopped(net)) |
654 | netif_wake_queue(net); | |
655 | ||
c76acec6 JF |
656 | return 0; |
657 | ||
658 | failed_proto: | |
f91e3bd8 SR |
659 | net->stats.rx_errors++; |
660 | net->stats.rx_dropped++; | |
661 | ||
c76acec6 | 662 | dev_kfree_skb_any(skb); |
f91e3bd8 SR |
663 | if (netif_queue_stopped(net)) |
664 | netif_wake_queue(net); | |
665 | ||
666 | net->last_rx = jiffies; | |
667 | ||
c76acec6 JF |
668 | return 0; |
669 | } | |
670 | ||
f91e3bd8 | 671 | static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, |
5a124d38 SR |
672 | int source_node_id, int generation, |
673 | bool is_broadcast) | |
f91e3bd8 | 674 | { |
c76acec6 | 675 | struct sk_buff *skb; |
5a124d38 | 676 | struct net_device *net = dev->netdev; |
f91e3bd8 | 677 | struct rfc2734_header hdr; |
c76acec6 JF |
678 | unsigned lf; |
679 | unsigned long flags; | |
f91e3bd8 SR |
680 | struct fwnet_peer *peer; |
681 | struct fwnet_partial_datagram *pd; | |
c76acec6 JF |
682 | int fg_off; |
683 | int dg_size; | |
684 | u16 datagram_label; | |
685 | int retval; | |
686 | u16 ether_type; | |
687 | ||
f91e3bd8 SR |
688 | hdr.w0 = be32_to_cpu(buf[0]); |
689 | lf = fwnet_get_hdr_lf(&hdr); | |
690 | if (lf == RFC2374_HDR_UNFRAG) { | |
c76acec6 JF |
691 | /* |
692 | * An unfragmented datagram has been received by the ieee1394 | |
693 | * bus. Build an skbuff around it so we can pass it to the | |
694 | * high level network layer. | |
695 | */ | |
f91e3bd8 | 696 | ether_type = fwnet_get_hdr_ether_type(&hdr); |
c76acec6 | 697 | buf++; |
f91e3bd8 | 698 | len -= RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 | 699 | |
f91e3bd8 | 700 | skb = dev_alloc_skb(len + net->hard_header_len + 15); |
c76acec6 | 701 | if (unlikely(!skb)) { |
f91e3bd8 SR |
702 | fw_error("out of memory\n"); |
703 | net->stats.rx_dropped++; | |
704 | ||
c76acec6 JF |
705 | return -1; |
706 | } | |
f91e3bd8 SR |
707 | skb_reserve(skb, (net->hard_header_len + 15) & ~15); |
708 | memcpy(skb_put(skb, len), buf, len); | |
709 | ||
710 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
711 | is_broadcast, ether_type); | |
c76acec6 JF |
712 | } |
713 | /* A datagram fragment has been received, now the fun begins. */ | |
714 | hdr.w1 = ntohl(buf[1]); | |
f91e3bd8 SR |
715 | buf += 2; |
716 | len -= RFC2374_FRAG_HDR_SIZE; | |
717 | if (lf == RFC2374_HDR_FIRSTFRAG) { | |
718 | ether_type = fwnet_get_hdr_ether_type(&hdr); | |
c76acec6 JF |
719 | fg_off = 0; |
720 | } else { | |
f91e3bd8 SR |
721 | ether_type = 0; |
722 | fg_off = fwnet_get_hdr_fg_off(&hdr); | |
c76acec6 | 723 | } |
f91e3bd8 SR |
724 | datagram_label = fwnet_get_hdr_dgl(&hdr); |
725 | dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */ | |
f91e3bd8 | 726 | |
5a124d38 SR |
727 | spin_lock_irqsave(&dev->lock, flags); |
728 | ||
729 | peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); | |
730 | if (!peer) | |
731 | goto bad_proto; | |
f91e3bd8 SR |
732 | |
733 | pd = fwnet_pd_find(peer, datagram_label); | |
c76acec6 | 734 | if (pd == NULL) { |
f91e3bd8 | 735 | while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { |
c76acec6 | 736 | /* remove the oldest */ |
f91e3bd8 SR |
737 | fwnet_pd_delete(list_first_entry(&peer->pd_list, |
738 | struct fwnet_partial_datagram, pd_link)); | |
739 | peer->pdg_size--; | |
c76acec6 | 740 | } |
f91e3bd8 SR |
741 | pd = fwnet_pd_new(net, peer, datagram_label, |
742 | dg_size, buf, fg_off, len); | |
743 | if (pd == NULL) { | |
c76acec6 JF |
744 | retval = -ENOMEM; |
745 | goto bad_proto; | |
746 | } | |
f91e3bd8 | 747 | peer->pdg_size++; |
c76acec6 | 748 | } else { |
f91e3bd8 SR |
749 | if (fwnet_frag_overlap(pd, fg_off, len) || |
750 | pd->datagram_size != dg_size) { | |
c76acec6 JF |
751 | /* |
752 | * Differing datagram sizes or overlapping fragments, | |
f91e3bd8 | 753 | * discard old datagram and start a new one. |
c76acec6 | 754 | */ |
f91e3bd8 SR |
755 | fwnet_pd_delete(pd); |
756 | pd = fwnet_pd_new(net, peer, datagram_label, | |
757 | dg_size, buf, fg_off, len); | |
758 | if (pd == NULL) { | |
c76acec6 | 759 | retval = -ENOMEM; |
f91e3bd8 | 760 | peer->pdg_size--; |
c76acec6 JF |
761 | goto bad_proto; |
762 | } | |
763 | } else { | |
f91e3bd8 | 764 | if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { |
c76acec6 JF |
765 | /* |
766 | * Couldn't save off fragment anyway | |
767 | * so might as well obliterate the | |
768 | * datagram now. | |
769 | */ | |
f91e3bd8 SR |
770 | fwnet_pd_delete(pd); |
771 | peer->pdg_size--; | |
c76acec6 JF |
772 | goto bad_proto; |
773 | } | |
774 | } | |
775 | } /* new datagram or add to existing one */ | |
776 | ||
f91e3bd8 | 777 | if (lf == RFC2374_HDR_FIRSTFRAG) |
c76acec6 | 778 | pd->ether_type = ether_type; |
f91e3bd8 SR |
779 | |
780 | if (fwnet_pd_is_complete(pd)) { | |
c76acec6 | 781 | ether_type = pd->ether_type; |
f91e3bd8 | 782 | peer->pdg_size--; |
c76acec6 | 783 | skb = skb_get(pd->skb); |
f91e3bd8 SR |
784 | fwnet_pd_delete(pd); |
785 | ||
5a124d38 | 786 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
787 | |
788 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
789 | false, ether_type); | |
c76acec6 JF |
790 | } |
791 | /* | |
792 | * Datagram is not complete, we're done for the | |
793 | * moment. | |
794 | */ | |
5a124d38 | 795 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 | 796 | |
c76acec6 JF |
797 | return 0; |
798 | ||
799 | bad_proto: | |
5a124d38 | 800 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
801 | |
802 | if (netif_queue_stopped(net)) | |
803 | netif_wake_queue(net); | |
804 | ||
c76acec6 JF |
805 | return 0; |
806 | } | |
807 | ||
f91e3bd8 SR |
808 | static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |
809 | int tcode, int destination, int source, int generation, | |
810 | int speed, unsigned long long offset, void *payload, | |
811 | size_t length, void *callback_data) | |
812 | { | |
00635b8e SR |
813 | struct fwnet_device *dev = callback_data; |
814 | int rcode; | |
c76acec6 | 815 | |
00635b8e SR |
816 | if (destination == IEEE1394_ALL_NODES) { |
817 | kfree(r); | |
f91e3bd8 | 818 | |
c76acec6 JF |
819 | return; |
820 | } | |
f91e3bd8 | 821 | |
00635b8e SR |
822 | if (offset != dev->handler.offset) |
823 | rcode = RCODE_ADDRESS_ERROR; | |
824 | else if (tcode != TCODE_WRITE_BLOCK_REQUEST) | |
825 | rcode = RCODE_TYPE_ERROR; | |
826 | else if (fwnet_incoming_packet(dev, payload, length, | |
827 | source, generation, false) != 0) { | |
f91e3bd8 | 828 | fw_error("Incoming packet failure\n"); |
00635b8e SR |
829 | rcode = RCODE_CONFLICT_ERROR; |
830 | } else | |
831 | rcode = RCODE_COMPLETE; | |
f91e3bd8 | 832 | |
00635b8e | 833 | fw_send_response(card, r, rcode); |
c76acec6 JF |
834 | } |
835 | ||
f91e3bd8 SR |
836 | static void fwnet_receive_broadcast(struct fw_iso_context *context, |
837 | u32 cycle, size_t header_length, void *header, void *data) | |
838 | { | |
839 | struct fwnet_device *dev; | |
c76acec6 JF |
840 | struct fw_iso_packet packet; |
841 | struct fw_card *card; | |
f91e3bd8 SR |
842 | __be16 *hdr_ptr; |
843 | __be32 *buf_ptr; | |
c76acec6 JF |
844 | int retval; |
845 | u32 length; | |
846 | u16 source_node_id; | |
847 | u32 specifier_id; | |
848 | u32 ver; | |
849 | unsigned long offset; | |
850 | unsigned long flags; | |
851 | ||
f91e3bd8 SR |
852 | dev = data; |
853 | card = dev->card; | |
c76acec6 | 854 | hdr_ptr = header; |
f91e3bd8 SR |
855 | length = be16_to_cpup(hdr_ptr); |
856 | ||
857 | spin_lock_irqsave(&dev->lock, flags); | |
858 | ||
859 | offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; | |
860 | buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; | |
861 | if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) | |
862 | dev->broadcast_rcv_next_ptr = 0; | |
863 | ||
864 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
865 | |
866 | specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 | |
867 | | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; | |
f91e3bd8 | 868 | ver = be32_to_cpu(buf_ptr[1]) & 0xffffff; |
c76acec6 | 869 | source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; |
f91e3bd8 SR |
870 | |
871 | if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) { | |
c76acec6 | 872 | buf_ptr += 2; |
f91e3bd8 SR |
873 | length -= IEEE1394_GASP_HDR_SIZE; |
874 | fwnet_incoming_packet(dev, buf_ptr, length, | |
5a124d38 | 875 | source_node_id, -1, true); |
f91e3bd8 SR |
876 | } |
877 | ||
878 | packet.payload_length = dev->rcv_buffer_size; | |
c76acec6 JF |
879 | packet.interrupt = 1; |
880 | packet.skip = 0; | |
881 | packet.tag = 3; | |
882 | packet.sy = 0; | |
f91e3bd8 SR |
883 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
884 | ||
885 | spin_lock_irqsave(&dev->lock, flags); | |
c76acec6 | 886 | |
f91e3bd8 SR |
887 | retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, |
888 | &dev->broadcast_rcv_buffer, offset); | |
889 | ||
890 | spin_unlock_irqrestore(&dev->lock, flags); | |
891 | ||
892 | if (retval < 0) | |
893 | fw_error("requeue failed\n"); | |
c76acec6 JF |
894 | } |
895 | ||
f91e3bd8 SR |
896 | static struct kmem_cache *fwnet_packet_task_cache; |
897 | ||
898 | static int fwnet_send_packet(struct fwnet_packet_task *ptask); | |
899 | ||
900 | static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) | |
901 | { | |
902 | struct fwnet_device *dev; | |
c76acec6 JF |
903 | unsigned long flags; |
904 | ||
f91e3bd8 SR |
905 | dev = ptask->dev; |
906 | ||
907 | spin_lock_irqsave(&dev->lock, flags); | |
908 | list_del(&ptask->pt_link); | |
909 | spin_unlock_irqrestore(&dev->lock, flags); | |
910 | ||
911 | ptask->outstanding_pkts--; /* FIXME access inside lock */ | |
912 | ||
913 | if (ptask->outstanding_pkts > 0) { | |
c76acec6 JF |
914 | u16 dg_size; |
915 | u16 fg_off; | |
916 | u16 datagram_label; | |
917 | u16 lf; | |
918 | struct sk_buff *skb; | |
919 | ||
920 | /* Update the ptask to point to the next fragment and send it */ | |
f91e3bd8 | 921 | lf = fwnet_get_hdr_lf(&ptask->hdr); |
c76acec6 | 922 | switch (lf) { |
f91e3bd8 SR |
923 | case RFC2374_HDR_LASTFRAG: |
924 | case RFC2374_HDR_UNFRAG: | |
c76acec6 | 925 | default: |
f91e3bd8 SR |
926 | fw_error("Outstanding packet %x lf %x, header %x,%x\n", |
927 | ptask->outstanding_pkts, lf, ptask->hdr.w0, | |
928 | ptask->hdr.w1); | |
c76acec6 JF |
929 | BUG(); |
930 | ||
f91e3bd8 | 931 | case RFC2374_HDR_FIRSTFRAG: |
c76acec6 | 932 | /* Set frag type here for future interior fragments */ |
f91e3bd8 SR |
933 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); |
934 | fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
935 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
936 | break; |
937 | ||
f91e3bd8 SR |
938 | case RFC2374_HDR_INTFRAG: |
939 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); | |
940 | fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) | |
941 | + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
942 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
943 | break; |
944 | } | |
945 | skb = ptask->skb; | |
f91e3bd8 SR |
946 | skb_pull(skb, ptask->max_payload); |
947 | if (ptask->outstanding_pkts > 1) { | |
948 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, | |
949 | dg_size, fg_off, datagram_label); | |
c76acec6 | 950 | } else { |
f91e3bd8 SR |
951 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, |
952 | dg_size, fg_off, datagram_label); | |
953 | ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; | |
c76acec6 | 954 | } |
f91e3bd8 | 955 | fwnet_send_packet(ptask); |
c76acec6 | 956 | } else { |
f91e3bd8 SR |
957 | dev_kfree_skb_any(ptask->skb); |
958 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
c76acec6 JF |
959 | } |
960 | } | |
961 | ||
f91e3bd8 SR |
962 | static void fwnet_write_complete(struct fw_card *card, int rcode, |
963 | void *payload, size_t length, void *data) | |
964 | { | |
965 | struct fwnet_packet_task *ptask; | |
c76acec6 JF |
966 | |
967 | ptask = data; | |
c76acec6 | 968 | |
f91e3bd8 SR |
969 | if (rcode == RCODE_COMPLETE) |
970 | fwnet_transmit_packet_done(ptask); | |
971 | else | |
972 | fw_error("fwnet_write_complete: failed: %x\n", rcode); | |
c76acec6 | 973 | /* ??? error recovery */ |
c76acec6 JF |
974 | } |
975 | ||
f91e3bd8 SR |
976 | static int fwnet_send_packet(struct fwnet_packet_task *ptask) |
977 | { | |
978 | struct fwnet_device *dev; | |
c76acec6 | 979 | unsigned tx_len; |
f91e3bd8 | 980 | struct rfc2734_header *bufhdr; |
c76acec6 | 981 | unsigned long flags; |
c76acec6 | 982 | |
f91e3bd8 | 983 | dev = ptask->dev; |
c76acec6 | 984 | tx_len = ptask->max_payload; |
f91e3bd8 SR |
985 | switch (fwnet_get_hdr_lf(&ptask->hdr)) { |
986 | case RFC2374_HDR_UNFRAG: | |
987 | bufhdr = (struct rfc2734_header *) | |
988 | skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); | |
989 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
c76acec6 JF |
990 | break; |
991 | ||
f91e3bd8 SR |
992 | case RFC2374_HDR_FIRSTFRAG: |
993 | case RFC2374_HDR_INTFRAG: | |
994 | case RFC2374_HDR_LASTFRAG: | |
995 | bufhdr = (struct rfc2734_header *) | |
996 | skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); | |
997 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
998 | put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); | |
c76acec6 JF |
999 | break; |
1000 | ||
1001 | default: | |
1002 | BUG(); | |
1003 | } | |
f91e3bd8 SR |
1004 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
1005 | u8 *p; | |
c76acec6 | 1006 | int generation; |
f91e3bd8 | 1007 | int node_id; |
c76acec6 JF |
1008 | |
1009 | /* ptask->generation may not have been set yet */ | |
f91e3bd8 | 1010 | generation = dev->card->generation; |
c76acec6 | 1011 | smp_rmb(); |
f91e3bd8 SR |
1012 | node_id = dev->card->node_id; |
1013 | ||
1014 | p = skb_push(ptask->skb, 8); | |
1015 | put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); | |
1016 | put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 | |
1017 | | RFC2734_SW_VERSION, &p[4]); | |
1018 | ||
1019 | /* We should not transmit if broadcast_channel.valid == 0. */ | |
1020 | fw_send_request(dev->card, &ptask->transaction, | |
1021 | TCODE_STREAM_DATA, | |
1022 | fw_stream_packet_destination_id(3, | |
1023 | IEEE1394_BROADCAST_CHANNEL, 0), | |
1024 | generation, SCODE_100, 0ULL, ptask->skb->data, | |
1025 | tx_len + 8, fwnet_write_complete, ptask); | |
1026 | ||
1027 | /* FIXME race? */ | |
1028 | spin_lock_irqsave(&dev->lock, flags); | |
1029 | list_add_tail(&ptask->pt_link, &dev->broadcasted_list); | |
1030 | spin_unlock_irqrestore(&dev->lock, flags); | |
1031 | ||
c76acec6 | 1032 | return 0; |
c76acec6 | 1033 | } |
f91e3bd8 SR |
1034 | |
1035 | fw_send_request(dev->card, &ptask->transaction, | |
1036 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, | |
1037 | ptask->generation, ptask->speed, ptask->fifo_addr, | |
1038 | ptask->skb->data, tx_len, fwnet_write_complete, ptask); | |
1039 | ||
1040 | /* FIXME race? */ | |
1041 | spin_lock_irqsave(&dev->lock, flags); | |
1042 | list_add_tail(&ptask->pt_link, &dev->sent_list); | |
1043 | spin_unlock_irqrestore(&dev->lock, flags); | |
1044 | ||
5a124d38 | 1045 | dev->netdev->trans_start = jiffies; |
f91e3bd8 | 1046 | |
c76acec6 JF |
1047 | return 0; |
1048 | } | |
1049 | ||
f91e3bd8 SR |
1050 | static int fwnet_broadcast_start(struct fwnet_device *dev) |
1051 | { | |
c76acec6 JF |
1052 | struct fw_iso_context *context; |
1053 | int retval; | |
1054 | unsigned num_packets; | |
1055 | unsigned max_receive; | |
1056 | struct fw_iso_packet packet; | |
1057 | unsigned long offset; | |
1058 | unsigned u; | |
c76acec6 | 1059 | |
f91e3bd8 SR |
1060 | if (dev->local_fifo == FWNET_NO_FIFO_ADDR) { |
1061 | /* outside OHCI posted write area? */ | |
1062 | static const struct fw_address_region region = { | |
1063 | .start = 0xffff00000000ULL, | |
1064 | .end = CSR_REGISTER_BASE, | |
1065 | }; | |
1066 | ||
1067 | dev->handler.length = 4096; | |
1068 | dev->handler.address_callback = fwnet_receive_packet; | |
1069 | dev->handler.callback_data = dev; | |
1070 | ||
1071 | retval = fw_core_add_address_handler(&dev->handler, ®ion); | |
1072 | if (retval < 0) | |
c76acec6 | 1073 | goto failed_initial; |
f91e3bd8 SR |
1074 | |
1075 | dev->local_fifo = dev->handler.offset; | |
c76acec6 JF |
1076 | } |
1077 | ||
f91e3bd8 SR |
1078 | max_receive = 1U << (dev->card->max_receive + 1); |
1079 | num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; | |
1080 | ||
1081 | if (!dev->broadcast_rcv_context) { | |
c76acec6 JF |
1082 | void **ptrptr; |
1083 | ||
f91e3bd8 SR |
1084 | context = fw_iso_context_create(dev->card, |
1085 | FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL, | |
1086 | dev->card->link_speed, 8, fwnet_receive_broadcast, dev); | |
c76acec6 JF |
1087 | if (IS_ERR(context)) { |
1088 | retval = PTR_ERR(context); | |
1089 | goto failed_context_create; | |
1090 | } | |
f91e3bd8 SR |
1091 | |
1092 | retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, | |
1093 | dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); | |
1094 | if (retval < 0) | |
c76acec6 | 1095 | goto failed_buffer_init; |
f91e3bd8 SR |
1096 | |
1097 | ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL); | |
1098 | if (!ptrptr) { | |
c76acec6 JF |
1099 | retval = -ENOMEM; |
1100 | goto failed_ptrs_alloc; | |
1101 | } | |
f91e3bd8 SR |
1102 | |
1103 | dev->broadcast_rcv_buffer_ptrs = ptrptr; | |
1104 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { | |
c76acec6 JF |
1105 | void *ptr; |
1106 | unsigned v; | |
1107 | ||
f91e3bd8 SR |
1108 | ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); |
1109 | for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) | |
1110 | *ptrptr++ = (void *) | |
1111 | ((char *)ptr + v * max_receive); | |
c76acec6 | 1112 | } |
f91e3bd8 SR |
1113 | dev->broadcast_rcv_context = context; |
1114 | } else { | |
1115 | context = dev->broadcast_rcv_context; | |
1116 | } | |
c76acec6 JF |
1117 | |
1118 | packet.payload_length = max_receive; | |
1119 | packet.interrupt = 1; | |
1120 | packet.skip = 0; | |
1121 | packet.tag = 3; | |
1122 | packet.sy = 0; | |
f91e3bd8 | 1123 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
c76acec6 | 1124 | offset = 0; |
f91e3bd8 SR |
1125 | |
1126 | for (u = 0; u < num_packets; u++) { | |
1127 | retval = fw_iso_context_queue(context, &packet, | |
1128 | &dev->broadcast_rcv_buffer, offset); | |
1129 | if (retval < 0) | |
c76acec6 | 1130 | goto failed_rcv_queue; |
f91e3bd8 | 1131 | |
c76acec6 JF |
1132 | offset += max_receive; |
1133 | } | |
f91e3bd8 SR |
1134 | dev->num_broadcast_rcv_ptrs = num_packets; |
1135 | dev->rcv_buffer_size = max_receive; | |
1136 | dev->broadcast_rcv_next_ptr = 0U; | |
1137 | retval = fw_iso_context_start(context, -1, 0, | |
1138 | FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ | |
1139 | if (retval < 0) | |
c76acec6 | 1140 | goto failed_rcv_queue; |
f91e3bd8 SR |
1141 | |
1142 | /* FIXME: adjust it according to the min. speed of all known peers? */ | |
1143 | dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 | |
1144 | - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; | |
1145 | dev->broadcast_state = FWNET_BROADCAST_RUNNING; | |
1146 | ||
c76acec6 JF |
1147 | return 0; |
1148 | ||
1149 | failed_rcv_queue: | |
f91e3bd8 SR |
1150 | kfree(dev->broadcast_rcv_buffer_ptrs); |
1151 | dev->broadcast_rcv_buffer_ptrs = NULL; | |
c76acec6 | 1152 | failed_ptrs_alloc: |
f91e3bd8 | 1153 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); |
c76acec6 | 1154 | failed_buffer_init: |
f91e3bd8 SR |
1155 | fw_iso_context_destroy(context); |
1156 | dev->broadcast_rcv_context = NULL; | |
c76acec6 | 1157 | failed_context_create: |
f91e3bd8 | 1158 | fw_core_remove_address_handler(&dev->handler); |
c76acec6 | 1159 | failed_initial: |
f91e3bd8 SR |
1160 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
1161 | ||
c76acec6 JF |
1162 | return retval; |
1163 | } | |
1164 | ||
f91e3bd8 SR |
1165 | /* ifup */ |
1166 | static int fwnet_open(struct net_device *net) | |
1167 | { | |
1168 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1169 | int ret; |
1170 | ||
f91e3bd8 SR |
1171 | if (dev->broadcast_state == FWNET_BROADCAST_ERROR) { |
1172 | ret = fwnet_broadcast_start(dev); | |
c76acec6 JF |
1173 | if (ret) |
1174 | return ret; | |
1175 | } | |
f91e3bd8 SR |
1176 | netif_start_queue(net); |
1177 | ||
c76acec6 JF |
1178 | return 0; |
1179 | } | |
1180 | ||
f91e3bd8 SR |
1181 | /* ifdown */ |
1182 | static int fwnet_stop(struct net_device *net) | |
c76acec6 | 1183 | { |
f91e3bd8 SR |
1184 | netif_stop_queue(net); |
1185 | ||
1186 | /* Deallocate iso context for use by other applications? */ | |
c76acec6 | 1187 | |
c76acec6 JF |
1188 | return 0; |
1189 | } | |
1190 | ||
f91e3bd8 | 1191 | static int fwnet_tx(struct sk_buff *skb, struct net_device *net) |
c76acec6 | 1192 | { |
f91e3bd8 SR |
1193 | struct fwnet_header hdr_buf; |
1194 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1195 | __be16 proto; |
1196 | u16 dest_node; | |
c76acec6 JF |
1197 | unsigned max_payload; |
1198 | u16 dg_size; | |
1199 | u16 *datagram_label_ptr; | |
f91e3bd8 | 1200 | struct fwnet_packet_task *ptask; |
5a124d38 SR |
1201 | struct fwnet_peer *peer; |
1202 | unsigned long flags; | |
c76acec6 | 1203 | |
f91e3bd8 | 1204 | ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); |
c76acec6 JF |
1205 | if (ptask == NULL) |
1206 | goto fail; | |
1207 | ||
1208 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1209 | if (!skb) | |
1210 | goto fail; | |
1211 | ||
1212 | /* | |
f91e3bd8 | 1213 | * Make a copy of the driver-specific header. |
c76acec6 JF |
1214 | * We might need to rebuild the header on tx failure. |
1215 | */ | |
1216 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
1217 | skb_pull(skb, sizeof(hdr_buf)); | |
1218 | ||
1219 | proto = hdr_buf.h_proto; | |
1220 | dg_size = skb->len; | |
1221 | ||
5a124d38 SR |
1222 | /* serialize access to peer, including peer->datagram_label */ |
1223 | spin_lock_irqsave(&dev->lock, flags); | |
1224 | ||
c76acec6 JF |
1225 | /* |
1226 | * Set the transmission type for the packet. ARP packets and IP | |
1227 | * broadcast packets are sent via GASP. | |
1228 | */ | |
f91e3bd8 | 1229 | if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0 |
c76acec6 | 1230 | || proto == htons(ETH_P_ARP) |
f91e3bd8 SR |
1231 | || (proto == htons(ETH_P_IP) |
1232 | && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { | |
5a124d38 | 1233 | max_payload = dev->broadcast_xmt_max_payload; |
f91e3bd8 SR |
1234 | datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; |
1235 | ||
5a124d38 SR |
1236 | ptask->fifo_addr = FWNET_NO_FIFO_ADDR; |
1237 | ptask->generation = 0; | |
1238 | ptask->dest_node = IEEE1394_ALL_NODES; | |
1239 | ptask->speed = SCODE_100; | |
c76acec6 | 1240 | } else { |
f91e3bd8 | 1241 | __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); |
c76acec6 JF |
1242 | u8 generation; |
1243 | ||
f91e3bd8 | 1244 | peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); |
5a124d38 SR |
1245 | if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR) |
1246 | goto fail_unlock; | |
c76acec6 | 1247 | |
5a124d38 SR |
1248 | generation = peer->generation; |
1249 | dest_node = peer->node_id; | |
1250 | max_payload = peer->max_payload; | |
f91e3bd8 | 1251 | datagram_label_ptr = &peer->datagram_label; |
c76acec6 | 1252 | |
5a124d38 SR |
1253 | ptask->fifo_addr = peer->fifo; |
1254 | ptask->generation = generation; | |
1255 | ptask->dest_node = dest_node; | |
1256 | ptask->speed = peer->speed; | |
c76acec6 JF |
1257 | } |
1258 | ||
1259 | /* If this is an ARP packet, convert it */ | |
1260 | if (proto == htons(ETH_P_ARP)) { | |
c76acec6 JF |
1261 | struct arphdr *arp = (struct arphdr *)skb->data; |
1262 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
f91e3bd8 SR |
1263 | struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data; |
1264 | __be32 ipaddr; | |
1265 | ||
1266 | ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN)); | |
1267 | ||
1268 | arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN; | |
1269 | arp1394->max_rec = dev->card->max_receive; | |
1270 | arp1394->sspd = dev->card->link_speed; | |
1271 | ||
1272 | put_unaligned_be16(dev->local_fifo >> 32, | |
1273 | &arp1394->fifo_hi); | |
1274 | put_unaligned_be32(dev->local_fifo & 0xffffffff, | |
1275 | &arp1394->fifo_lo); | |
1276 | put_unaligned(ipaddr, &arp1394->sip); | |
c76acec6 | 1277 | } |
c76acec6 JF |
1278 | |
1279 | ptask->hdr.w0 = 0; | |
1280 | ptask->hdr.w1 = 0; | |
1281 | ptask->skb = skb; | |
f91e3bd8 SR |
1282 | ptask->dev = dev; |
1283 | ||
c76acec6 | 1284 | /* Does it all fit in one packet? */ |
f91e3bd8 SR |
1285 | if (dg_size <= max_payload) { |
1286 | fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); | |
c76acec6 | 1287 | ptask->outstanding_pkts = 1; |
f91e3bd8 | 1288 | max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 JF |
1289 | } else { |
1290 | u16 datagram_label; | |
1291 | ||
f91e3bd8 | 1292 | max_payload -= RFC2374_FRAG_OVERHEAD; |
c76acec6 | 1293 | datagram_label = (*datagram_label_ptr)++; |
f91e3bd8 SR |
1294 | fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, |
1295 | datagram_label); | |
c76acec6 | 1296 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
f91e3bd8 | 1297 | max_payload += RFC2374_FRAG_HDR_SIZE; |
c76acec6 | 1298 | } |
5a124d38 SR |
1299 | |
1300 | spin_unlock_irqrestore(&dev->lock, flags); | |
1301 | ||
c76acec6 | 1302 | ptask->max_payload = max_payload; |
f91e3bd8 SR |
1303 | fwnet_send_packet(ptask); |
1304 | ||
c76acec6 JF |
1305 | return NETDEV_TX_OK; |
1306 | ||
5a124d38 SR |
1307 | fail_unlock: |
1308 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
1309 | fail: |
1310 | if (ptask) | |
f91e3bd8 | 1311 | kmem_cache_free(fwnet_packet_task_cache, ptask); |
c76acec6 JF |
1312 | |
1313 | if (skb != NULL) | |
1314 | dev_kfree_skb(skb); | |
1315 | ||
f91e3bd8 SR |
1316 | net->stats.tx_dropped++; |
1317 | net->stats.tx_errors++; | |
c76acec6 JF |
1318 | |
1319 | /* | |
1320 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1321 | * causes serious problems" here, allegedly. Before that patch, | |
1322 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1323 | * Perhaps more needs to be done? Stop the queue in serious | |
1324 | * conditions and restart it elsewhere? | |
1325 | */ | |
1326 | return NETDEV_TX_OK; | |
1327 | } | |
1328 | ||
f91e3bd8 SR |
1329 | static int fwnet_change_mtu(struct net_device *net, int new_mtu) |
1330 | { | |
c76acec6 JF |
1331 | if (new_mtu < 68) |
1332 | return -EINVAL; | |
1333 | ||
f91e3bd8 | 1334 | net->mtu = new_mtu; |
c76acec6 JF |
1335 | return 0; |
1336 | } | |
1337 | ||
f91e3bd8 SR |
1338 | static void fwnet_get_drvinfo(struct net_device *net, |
1339 | struct ethtool_drvinfo *info) | |
1340 | { | |
1341 | strcpy(info->driver, KBUILD_MODNAME); | |
1342 | strcpy(info->bus_info, "ieee1394"); | |
c76acec6 JF |
1343 | } |
1344 | ||
f91e3bd8 SR |
1345 | static struct ethtool_ops fwnet_ethtool_ops = { |
1346 | .get_drvinfo = fwnet_get_drvinfo, | |
c76acec6 JF |
1347 | }; |
1348 | ||
f91e3bd8 SR |
1349 | static const struct net_device_ops fwnet_netdev_ops = { |
1350 | .ndo_open = fwnet_open, | |
1351 | .ndo_stop = fwnet_stop, | |
1352 | .ndo_start_xmit = fwnet_tx, | |
f91e3bd8 | 1353 | .ndo_change_mtu = fwnet_change_mtu, |
c76acec6 JF |
1354 | }; |
1355 | ||
f91e3bd8 SR |
1356 | static void fwnet_init_dev(struct net_device *net) |
1357 | { | |
1358 | net->header_ops = &fwnet_header_ops; | |
1359 | net->netdev_ops = &fwnet_netdev_ops; | |
1337f853 | 1360 | net->watchdog_timeo = 2 * HZ; |
f91e3bd8 SR |
1361 | net->flags = IFF_BROADCAST | IFF_MULTICAST; |
1362 | net->features = NETIF_F_HIGHDMA; | |
1363 | net->addr_len = FWNET_ALEN; | |
1364 | net->hard_header_len = FWNET_HLEN; | |
1365 | net->type = ARPHRD_IEEE1394; | |
1337f853 | 1366 | net->tx_queue_len = 10; |
f91e3bd8 | 1367 | SET_ETHTOOL_OPS(net, &fwnet_ethtool_ops); |
c76acec6 JF |
1368 | } |
1369 | ||
5a124d38 SR |
1370 | /* caller must hold fwnet_device_mutex */ |
1371 | static struct fwnet_device *fwnet_dev_find(struct fw_card *card) | |
1372 | { | |
1373 | struct fwnet_device *dev; | |
1374 | ||
1375 | list_for_each_entry(dev, &fwnet_device_list, dev_link) | |
1376 | if (dev->card == card) | |
1377 | return dev; | |
1378 | ||
1379 | return NULL; | |
1380 | } | |
1381 | ||
1382 | static int fwnet_add_peer(struct fwnet_device *dev, | |
1383 | struct fw_unit *unit, struct fw_device *device) | |
1384 | { | |
1385 | struct fwnet_peer *peer; | |
1386 | ||
1387 | peer = kmalloc(sizeof(*peer), GFP_KERNEL); | |
1388 | if (!peer) | |
1389 | return -ENOMEM; | |
1390 | ||
b01b4bab SR |
1391 | dev_set_drvdata(&unit->device, peer); |
1392 | ||
5a124d38 SR |
1393 | peer->dev = dev; |
1394 | peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; | |
1395 | peer->fifo = FWNET_NO_FIFO_ADDR; | |
1396 | INIT_LIST_HEAD(&peer->pd_list); | |
1397 | peer->pdg_size = 0; | |
1398 | peer->datagram_label = 0; | |
1399 | peer->speed = device->max_speed; | |
1400 | peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); | |
1401 | ||
1402 | peer->generation = device->generation; | |
1403 | smp_rmb(); | |
1404 | peer->node_id = device->node_id; | |
1405 | ||
1406 | spin_lock_irq(&dev->lock); | |
1407 | list_add_tail(&peer->peer_link, &dev->peer_list); | |
1408 | spin_unlock_irq(&dev->lock); | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
f91e3bd8 SR |
1413 | static int fwnet_probe(struct device *_dev) |
1414 | { | |
1415 | struct fw_unit *unit = fw_unit(_dev); | |
1416 | struct fw_device *device = fw_parent_device(unit); | |
1417 | struct fw_card *card = device->card; | |
1418 | struct net_device *net; | |
b01b4bab | 1419 | bool allocated_netdev = false; |
f91e3bd8 | 1420 | struct fwnet_device *dev; |
c76acec6 | 1421 | unsigned max_mtu; |
5a124d38 | 1422 | int ret; |
c76acec6 | 1423 | |
5a124d38 | 1424 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1425 | |
5a124d38 SR |
1426 | dev = fwnet_dev_find(card); |
1427 | if (dev) { | |
5a124d38 SR |
1428 | net = dev->netdev; |
1429 | goto have_dev; | |
c76acec6 | 1430 | } |
5a124d38 | 1431 | |
f91e3bd8 SR |
1432 | net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev); |
1433 | if (net == NULL) { | |
5a124d38 | 1434 | ret = -ENOMEM; |
c76acec6 JF |
1435 | goto out; |
1436 | } | |
1437 | ||
b01b4bab | 1438 | allocated_netdev = true; |
f91e3bd8 SR |
1439 | SET_NETDEV_DEV(net, card->device); |
1440 | dev = netdev_priv(net); | |
c76acec6 | 1441 | |
f91e3bd8 SR |
1442 | spin_lock_init(&dev->lock); |
1443 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1444 | dev->broadcast_rcv_context = NULL; | |
1445 | dev->broadcast_xmt_max_payload = 0; | |
1446 | dev->broadcast_xmt_datagramlabel = 0; | |
c76acec6 | 1447 | |
f91e3bd8 | 1448 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
c76acec6 | 1449 | |
f91e3bd8 SR |
1450 | INIT_LIST_HEAD(&dev->packet_list); |
1451 | INIT_LIST_HEAD(&dev->broadcasted_list); | |
1452 | INIT_LIST_HEAD(&dev->sent_list); | |
5a124d38 | 1453 | INIT_LIST_HEAD(&dev->peer_list); |
c76acec6 | 1454 | |
f91e3bd8 | 1455 | dev->card = card; |
5a124d38 | 1456 | dev->netdev = net; |
c76acec6 JF |
1457 | |
1458 | /* | |
1459 | * Use the RFC 2734 default 1500 octets or the maximum payload | |
1460 | * as initial MTU | |
1461 | */ | |
1462 | max_mtu = (1 << (card->max_receive + 1)) | |
f91e3bd8 SR |
1463 | - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; |
1464 | net->mtu = min(1500U, max_mtu); | |
c76acec6 JF |
1465 | |
1466 | /* Set our hardware address while we're at it */ | |
f91e3bd8 SR |
1467 | put_unaligned_be64(card->guid, net->dev_addr); |
1468 | put_unaligned_be64(~0ULL, net->broadcast); | |
5a124d38 SR |
1469 | ret = register_netdev(net); |
1470 | if (ret) { | |
f91e3bd8 | 1471 | fw_error("Cannot register the driver\n"); |
c76acec6 JF |
1472 | goto out; |
1473 | } | |
1474 | ||
5a124d38 | 1475 | list_add_tail(&dev->dev_link, &fwnet_device_list); |
f91e3bd8 SR |
1476 | fw_notify("%s: IPv4 over FireWire on device %016llx\n", |
1477 | net->name, (unsigned long long)card->guid); | |
5a124d38 SR |
1478 | have_dev: |
1479 | ret = fwnet_add_peer(dev, unit, device); | |
b01b4bab | 1480 | if (ret && allocated_netdev) { |
5a124d38 SR |
1481 | unregister_netdev(net); |
1482 | list_del(&dev->dev_link); | |
1483 | } | |
c76acec6 | 1484 | out: |
b01b4bab | 1485 | if (ret && allocated_netdev) |
f91e3bd8 SR |
1486 | free_netdev(net); |
1487 | ||
5a124d38 SR |
1488 | mutex_unlock(&fwnet_device_mutex); |
1489 | ||
1490 | return ret; | |
1491 | } | |
1492 | ||
1493 | static void fwnet_remove_peer(struct fwnet_peer *peer) | |
1494 | { | |
1495 | struct fwnet_partial_datagram *pd, *pd_next; | |
1496 | ||
1497 | spin_lock_irq(&peer->dev->lock); | |
1498 | list_del(&peer->peer_link); | |
1499 | spin_unlock_irq(&peer->dev->lock); | |
1500 | ||
1501 | list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) | |
1502 | fwnet_pd_delete(pd); | |
1503 | ||
1504 | kfree(peer); | |
c76acec6 JF |
1505 | } |
1506 | ||
f91e3bd8 SR |
1507 | static int fwnet_remove(struct device *_dev) |
1508 | { | |
b01b4bab | 1509 | struct fwnet_peer *peer = dev_get_drvdata(_dev); |
5a124d38 | 1510 | struct fwnet_device *dev = peer->dev; |
f91e3bd8 | 1511 | struct net_device *net; |
f91e3bd8 SR |
1512 | struct fwnet_packet_task *ptask, *pt_next; |
1513 | ||
5a124d38 | 1514 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1515 | |
5a124d38 | 1516 | fwnet_remove_peer(peer); |
f91e3bd8 | 1517 | |
5a124d38 SR |
1518 | if (list_empty(&dev->peer_list)) { |
1519 | net = dev->netdev; | |
f91e3bd8 SR |
1520 | unregister_netdev(net); |
1521 | ||
1522 | if (dev->local_fifo != FWNET_NO_FIFO_ADDR) | |
1523 | fw_core_remove_address_handler(&dev->handler); | |
1524 | if (dev->broadcast_rcv_context) { | |
1525 | fw_iso_context_stop(dev->broadcast_rcv_context); | |
1526 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, | |
1527 | dev->card); | |
1528 | fw_iso_context_destroy(dev->broadcast_rcv_context); | |
c76acec6 | 1529 | } |
f91e3bd8 SR |
1530 | list_for_each_entry_safe(ptask, pt_next, |
1531 | &dev->packet_list, pt_link) { | |
1532 | dev_kfree_skb_any(ptask->skb); | |
1533 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
c76acec6 | 1534 | } |
f91e3bd8 SR |
1535 | list_for_each_entry_safe(ptask, pt_next, |
1536 | &dev->broadcasted_list, pt_link) { | |
1537 | dev_kfree_skb_any(ptask->skb); | |
1538 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
c76acec6 | 1539 | } |
f91e3bd8 SR |
1540 | list_for_each_entry_safe(ptask, pt_next, |
1541 | &dev->sent_list, pt_link) { | |
1542 | dev_kfree_skb_any(ptask->skb); | |
1543 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
c76acec6 | 1544 | } |
b01b4bab SR |
1545 | list_del(&dev->dev_link); |
1546 | ||
f91e3bd8 | 1547 | free_netdev(net); |
c76acec6 | 1548 | } |
f91e3bd8 | 1549 | |
5a124d38 SR |
1550 | mutex_unlock(&fwnet_device_mutex); |
1551 | ||
c76acec6 JF |
1552 | return 0; |
1553 | } | |
1554 | ||
f91e3bd8 SR |
1555 | /* |
1556 | * FIXME abort partially sent fragmented datagrams, | |
1557 | * discard partially received fragmented datagrams | |
1558 | */ | |
1559 | static void fwnet_update(struct fw_unit *unit) | |
1560 | { | |
1561 | struct fw_device *device = fw_parent_device(unit); | |
b01b4bab | 1562 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); |
5a124d38 | 1563 | int generation; |
c76acec6 | 1564 | |
5a124d38 SR |
1565 | generation = device->generation; |
1566 | ||
1567 | spin_lock_irq(&peer->dev->lock); | |
1568 | peer->node_id = device->node_id; | |
1569 | peer->generation = generation; | |
1570 | spin_unlock_irq(&peer->dev->lock); | |
c76acec6 JF |
1571 | } |
1572 | ||
f91e3bd8 SR |
1573 | static const struct ieee1394_device_id fwnet_id_table[] = { |
1574 | { | |
1575 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1576 | IEEE1394_MATCH_VERSION, | |
1577 | .specifier_id = IANA_SPECIFIER_ID, | |
1578 | .version = RFC2734_SW_VERSION, | |
1579 | }, | |
1580 | { } | |
1581 | }; | |
1582 | ||
1583 | static struct fw_driver fwnet_driver = { | |
c76acec6 | 1584 | .driver = { |
f91e3bd8 SR |
1585 | .owner = THIS_MODULE, |
1586 | .name = "net", | |
1587 | .bus = &fw_bus_type, | |
1588 | .probe = fwnet_probe, | |
1589 | .remove = fwnet_remove, | |
c76acec6 | 1590 | }, |
f91e3bd8 SR |
1591 | .update = fwnet_update, |
1592 | .id_table = fwnet_id_table, | |
1593 | }; | |
1594 | ||
1595 | static const u32 rfc2374_unit_directory_data[] = { | |
1596 | 0x00040000, /* directory_length */ | |
1597 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1598 | 0x81000003, /* textual descriptor offset */ | |
1599 | 0x13000001, /* unit_sw_version: RFC 2734 */ | |
1600 | 0x81000005, /* textual descriptor offset */ | |
1601 | 0x00030000, /* descriptor_length */ | |
1602 | 0x00000000, /* text */ | |
1603 | 0x00000000, /* minimal ASCII, en */ | |
1604 | 0x49414e41, /* I A N A */ | |
1605 | 0x00030000, /* descriptor_length */ | |
1606 | 0x00000000, /* text */ | |
1607 | 0x00000000, /* minimal ASCII, en */ | |
1608 | 0x49507634, /* I P v 4 */ | |
1609 | }; | |
1610 | ||
1611 | static struct fw_descriptor rfc2374_unit_directory = { | |
1612 | .length = ARRAY_SIZE(rfc2374_unit_directory_data), | |
1613 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1614 | .data = rfc2374_unit_directory_data | |
c76acec6 JF |
1615 | }; |
1616 | ||
f91e3bd8 SR |
1617 | static int __init fwnet_init(void) |
1618 | { | |
1619 | int err; | |
1620 | ||
1621 | err = fw_core_add_descriptor(&rfc2374_unit_directory); | |
1622 | if (err) | |
1623 | return err; | |
c76acec6 | 1624 | |
f91e3bd8 SR |
1625 | fwnet_packet_task_cache = kmem_cache_create("packet_task", |
1626 | sizeof(struct fwnet_packet_task), 0, 0, NULL); | |
1627 | if (!fwnet_packet_task_cache) { | |
1628 | err = -ENOMEM; | |
1629 | goto out; | |
1630 | } | |
1631 | ||
1632 | err = driver_register(&fwnet_driver.driver); | |
1633 | if (!err) | |
1634 | return 0; | |
1635 | ||
1636 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1637 | out: | |
1638 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
1639 | ||
1640 | return err; | |
c76acec6 | 1641 | } |
f91e3bd8 | 1642 | module_init(fwnet_init); |
c76acec6 | 1643 | |
f91e3bd8 SR |
1644 | static void __exit fwnet_cleanup(void) |
1645 | { | |
1646 | driver_unregister(&fwnet_driver.driver); | |
1647 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1648 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
c76acec6 | 1649 | } |
f91e3bd8 | 1650 | module_exit(fwnet_cleanup); |
c76acec6 | 1651 | |
f91e3bd8 SR |
1652 | MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); |
1653 | MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734"); | |
1654 | MODULE_LICENSE("GPL"); | |
1655 | MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); |