Commit | Line | Data |
---|---|---|
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> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
5a124d38 | 25 | #include <linux/spinlock.h> |
c76acec6 JF |
26 | |
27 | #include <asm/unaligned.h> | |
28 | #include <net/arp.h> | |
29 | ||
f91e3bd8 SR |
30 | #define FWNET_MAX_FRAGMENTS 25 /* arbitrary limit */ |
31 | #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16 * 1024 ? 4 : 2) | |
c76acec6 | 32 | |
f91e3bd8 SR |
33 | #define IEEE1394_BROADCAST_CHANNEL 31 |
34 | #define IEEE1394_ALL_NODES (0xffc0 | 0x003f) | |
35 | #define IEEE1394_MAX_PAYLOAD_S100 512 | |
36 | #define FWNET_NO_FIFO_ADDR (~0ULL) | |
c76acec6 | 37 | |
f91e3bd8 SR |
38 | #define IANA_SPECIFIER_ID 0x00005eU |
39 | #define RFC2734_SW_VERSION 0x000001U | |
c76acec6 | 40 | |
f91e3bd8 | 41 | #define IEEE1394_GASP_HDR_SIZE 8 |
c76acec6 | 42 | |
f91e3bd8 SR |
43 | #define RFC2374_UNFRAG_HDR_SIZE 4 |
44 | #define RFC2374_FRAG_HDR_SIZE 8 | |
45 | #define RFC2374_FRAG_OVERHEAD 4 | |
c76acec6 | 46 | |
f91e3bd8 SR |
47 | #define RFC2374_HDR_UNFRAG 0 /* unfragmented */ |
48 | #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */ | |
49 | #define RFC2374_HDR_LASTFRAG 2 /* last fragment */ | |
50 | #define RFC2374_HDR_INTFRAG 3 /* interior fragment */ | |
c76acec6 | 51 | |
f91e3bd8 | 52 | #define RFC2734_HW_ADDR_LEN 16 |
c76acec6 | 53 | |
f91e3bd8 SR |
54 | struct rfc2734_arp { |
55 | __be16 hw_type; /* 0x0018 */ | |
56 | __be16 proto_type; /* 0x0806 */ | |
57 | u8 hw_addr_len; /* 16 */ | |
58 | u8 ip_addr_len; /* 4 */ | |
59 | __be16 opcode; /* ARP Opcode */ | |
60 | /* Above is exactly the same format as struct arphdr */ | |
c76acec6 | 61 | |
f91e3bd8 SR |
62 | __be64 s_uniq_id; /* Sender's 64bit EUI */ |
63 | u8 max_rec; /* Sender's max packet size */ | |
64 | u8 sspd; /* Sender's max speed */ | |
65 | __be16 fifo_hi; /* hi 16bits of sender's FIFO addr */ | |
66 | __be32 fifo_lo; /* lo 32bits of sender's FIFO addr */ | |
67 | __be32 sip; /* Sender's IP Address */ | |
68 | __be32 tip; /* IP Address of requested hw addr */ | |
69 | } __attribute__((packed)); | |
c76acec6 | 70 | |
f91e3bd8 SR |
71 | /* This header format is specific to this driver implementation. */ |
72 | #define FWNET_ALEN 8 | |
73 | #define FWNET_HLEN 10 | |
74 | struct fwnet_header { | |
75 | u8 h_dest[FWNET_ALEN]; /* destination address */ | |
76 | __be16 h_proto; /* packet type ID field */ | |
77 | } __attribute__((packed)); | |
c76acec6 | 78 | |
f91e3bd8 SR |
79 | /* IPv4 and IPv6 encapsulation header */ |
80 | struct rfc2734_header { | |
c76acec6 JF |
81 | u32 w0; |
82 | u32 w1; | |
83 | }; | |
84 | ||
f91e3bd8 SR |
85 | #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) |
86 | #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) | |
87 | #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16) | |
88 | #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) | |
89 | #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) | |
c76acec6 | 90 | |
f91e3bd8 SR |
91 | #define fwnet_set_hdr_lf(lf) ((lf) << 30) |
92 | #define fwnet_set_hdr_ether_type(et) (et) | |
93 | #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16) | |
94 | #define fwnet_set_hdr_fg_off(fgo) (fgo) | |
c76acec6 | 95 | |
f91e3bd8 | 96 | #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) |
c76acec6 | 97 | |
f91e3bd8 SR |
98 | static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, |
99 | unsigned ether_type) | |
100 | { | |
101 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) | |
102 | | fwnet_set_hdr_ether_type(ether_type); | |
103 | } | |
c76acec6 | 104 | |
f91e3bd8 SR |
105 | static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, |
106 | unsigned ether_type, unsigned dg_size, unsigned dgl) | |
107 | { | |
108 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) | |
109 | | fwnet_set_hdr_dg_size(dg_size) | |
110 | | fwnet_set_hdr_ether_type(ether_type); | |
111 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
112 | } | |
c76acec6 | 113 | |
f91e3bd8 SR |
114 | static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, |
115 | unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) | |
116 | { | |
117 | hdr->w0 = fwnet_set_hdr_lf(lf) | |
118 | | fwnet_set_hdr_dg_size(dg_size) | |
119 | | fwnet_set_hdr_fg_off(fg_off); | |
120 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
121 | } | |
c76acec6 JF |
122 | |
123 | /* This list keeps track of what parts of the datagram have been filled in */ | |
f91e3bd8 SR |
124 | struct fwnet_fragment_info { |
125 | struct list_head fi_link; | |
c76acec6 JF |
126 | u16 offset; |
127 | u16 len; | |
128 | }; | |
129 | ||
f91e3bd8 SR |
130 | struct fwnet_partial_datagram { |
131 | struct list_head pd_link; | |
132 | struct list_head fi_list; | |
c76acec6 JF |
133 | struct sk_buff *skb; |
134 | /* FIXME Why not use skb->data? */ | |
135 | char *pbuf; | |
136 | u16 datagram_label; | |
137 | u16 ether_type; | |
138 | u16 datagram_size; | |
139 | }; | |
140 | ||
5a124d38 SR |
141 | static DEFINE_MUTEX(fwnet_device_mutex); |
142 | static LIST_HEAD(fwnet_device_list); | |
c76acec6 | 143 | |
f91e3bd8 | 144 | struct fwnet_device { |
5a124d38 | 145 | struct list_head dev_link; |
c76acec6 | 146 | spinlock_t lock; |
f91e3bd8 SR |
147 | enum { |
148 | FWNET_BROADCAST_ERROR, | |
149 | FWNET_BROADCAST_RUNNING, | |
150 | FWNET_BROADCAST_STOPPED, | |
151 | } broadcast_state; | |
c76acec6 JF |
152 | struct fw_iso_context *broadcast_rcv_context; |
153 | struct fw_iso_buffer broadcast_rcv_buffer; | |
154 | void **broadcast_rcv_buffer_ptrs; | |
155 | unsigned broadcast_rcv_next_ptr; | |
156 | unsigned num_broadcast_rcv_ptrs; | |
157 | unsigned rcv_buffer_size; | |
158 | /* | |
159 | * This value is the maximum unfragmented datagram size that can be | |
160 | * sent by the hardware. It already has the GASP overhead and the | |
161 | * unfragmented datagram header overhead calculated into it. | |
162 | */ | |
163 | unsigned broadcast_xmt_max_payload; | |
164 | u16 broadcast_xmt_datagramlabel; | |
165 | ||
166 | /* | |
f91e3bd8 | 167 | * The CSR address that remote nodes must send datagrams to for us to |
c76acec6 JF |
168 | * receive them. |
169 | */ | |
170 | struct fw_address_handler handler; | |
171 | u64 local_fifo; | |
172 | ||
c76acec6 JF |
173 | /* List of packets to be sent */ |
174 | struct list_head packet_list; | |
175 | /* | |
176 | * List of packets that were broadcasted. When we get an ISO interrupt | |
177 | * one of them has been sent | |
178 | */ | |
179 | struct list_head broadcasted_list; | |
180 | /* List of packets that have been sent but not yet acked */ | |
181 | struct list_head sent_list; | |
182 | ||
5a124d38 | 183 | struct list_head peer_list; |
c76acec6 | 184 | struct fw_card *card; |
5a124d38 SR |
185 | struct net_device *netdev; |
186 | }; | |
187 | ||
188 | struct fwnet_peer { | |
189 | struct list_head peer_link; | |
190 | struct fwnet_device *dev; | |
191 | u64 guid; | |
192 | u64 fifo; | |
193 | ||
194 | /* guarded by dev->lock */ | |
195 | struct list_head pd_list; /* received partial datagrams */ | |
196 | unsigned pdg_size; /* pd_list size */ | |
197 | ||
198 | u16 datagram_label; /* outgoing datagram label */ | |
199 | unsigned max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ | |
200 | int node_id; | |
201 | int generation; | |
202 | unsigned speed; | |
c76acec6 JF |
203 | }; |
204 | ||
205 | /* This is our task struct. It's used for the packet complete callback. */ | |
f91e3bd8 | 206 | struct fwnet_packet_task { |
c76acec6 | 207 | /* |
f91e3bd8 SR |
208 | * ptask can actually be on dev->packet_list, dev->broadcasted_list, |
209 | * or dev->sent_list depending on its current state. | |
c76acec6 | 210 | */ |
f91e3bd8 | 211 | struct list_head pt_link; |
c76acec6 | 212 | struct fw_transaction transaction; |
f91e3bd8 | 213 | struct rfc2734_header hdr; |
c76acec6 | 214 | struct sk_buff *skb; |
f91e3bd8 SR |
215 | struct fwnet_device *dev; |
216 | ||
c76acec6 JF |
217 | int outstanding_pkts; |
218 | unsigned max_payload; | |
219 | u64 fifo_addr; | |
220 | u16 dest_node; | |
221 | u8 generation; | |
222 | u8 speed; | |
223 | }; | |
224 | ||
f91e3bd8 SR |
225 | /* |
226 | * saddr == NULL means use device source address. | |
227 | * daddr == NULL means leave destination address (eg unresolved arp). | |
228 | */ | |
229 | static int fwnet_header_create(struct sk_buff *skb, struct net_device *net, | |
230 | unsigned short type, const void *daddr, | |
231 | const void *saddr, unsigned len) | |
232 | { | |
233 | struct fwnet_header *h; | |
c76acec6 | 234 | |
f91e3bd8 SR |
235 | h = (struct fwnet_header *)skb_push(skb, sizeof(*h)); |
236 | put_unaligned_be16(type, &h->h_proto); | |
c76acec6 | 237 | |
f91e3bd8 SR |
238 | if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
239 | memset(h->h_dest, 0, net->addr_len); | |
c76acec6 | 240 | |
f91e3bd8 | 241 | return net->hard_header_len; |
c76acec6 JF |
242 | } |
243 | ||
244 | if (daddr) { | |
f91e3bd8 SR |
245 | memcpy(h->h_dest, daddr, net->addr_len); |
246 | ||
247 | return net->hard_header_len; | |
c76acec6 JF |
248 | } |
249 | ||
f91e3bd8 | 250 | return -net->hard_header_len; |
c76acec6 JF |
251 | } |
252 | ||
f91e3bd8 | 253 | static int fwnet_header_rebuild(struct sk_buff *skb) |
c76acec6 | 254 | { |
f91e3bd8 | 255 | struct fwnet_header *h = (struct fwnet_header *)skb->data; |
c76acec6 | 256 | |
f91e3bd8 SR |
257 | if (get_unaligned_be16(&h->h_proto) == ETH_P_IP) |
258 | return arp_find((unsigned char *)&h->h_dest, skb); | |
c76acec6 | 259 | |
f91e3bd8 SR |
260 | fw_notify("%s: unable to resolve type %04x addresses\n", |
261 | skb->dev->name, be16_to_cpu(h->h_proto)); | |
c76acec6 JF |
262 | return 0; |
263 | } | |
264 | ||
f91e3bd8 SR |
265 | static int fwnet_header_cache(const struct neighbour *neigh, |
266 | struct hh_cache *hh) | |
267 | { | |
268 | struct net_device *net; | |
269 | struct fwnet_header *h; | |
c76acec6 | 270 | |
f91e3bd8 | 271 | if (hh->hh_type == cpu_to_be16(ETH_P_802_3)) |
c76acec6 | 272 | return -1; |
f91e3bd8 SR |
273 | net = neigh->dev; |
274 | h = (struct fwnet_header *)((u8 *)hh->hh_data + 16 - sizeof(*h)); | |
275 | h->h_proto = hh->hh_type; | |
276 | memcpy(h->h_dest, neigh->ha, net->addr_len); | |
277 | hh->hh_len = FWNET_HLEN; | |
c76acec6 | 278 | |
c76acec6 JF |
279 | return 0; |
280 | } | |
281 | ||
282 | /* Called by Address Resolution module to notify changes in address. */ | |
f91e3bd8 SR |
283 | static void fwnet_header_cache_update(struct hh_cache *hh, |
284 | const struct net_device *net, const unsigned char *haddr) | |
285 | { | |
286 | memcpy((u8 *)hh->hh_data + 16 - FWNET_HLEN, haddr, net->addr_len); | |
c76acec6 JF |
287 | } |
288 | ||
f91e3bd8 SR |
289 | static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
290 | { | |
291 | memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN); | |
292 | ||
293 | return FWNET_ALEN; | |
c76acec6 JF |
294 | } |
295 | ||
f91e3bd8 SR |
296 | static const struct header_ops fwnet_header_ops = { |
297 | .create = fwnet_header_create, | |
298 | .rebuild = fwnet_header_rebuild, | |
299 | .cache = fwnet_header_cache, | |
300 | .cache_update = fwnet_header_cache_update, | |
301 | .parse = fwnet_header_parse, | |
c76acec6 JF |
302 | }; |
303 | ||
c76acec6 | 304 | /* FIXME: is this correct for all cases? */ |
f91e3bd8 SR |
305 | static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd, |
306 | unsigned offset, unsigned len) | |
c76acec6 | 307 | { |
f91e3bd8 | 308 | struct fwnet_fragment_info *fi; |
c76acec6 JF |
309 | unsigned end = offset + len; |
310 | ||
f91e3bd8 SR |
311 | list_for_each_entry(fi, &pd->fi_list, fi_link) |
312 | if (offset < fi->offset + fi->len && end > fi->offset) | |
c76acec6 | 313 | return true; |
f91e3bd8 | 314 | |
c76acec6 JF |
315 | return false; |
316 | } | |
317 | ||
318 | /* Assumes that new fragment does not overlap any existing fragments */ | |
f91e3bd8 SR |
319 | static struct fwnet_fragment_info *fwnet_frag_new( |
320 | struct fwnet_partial_datagram *pd, unsigned offset, unsigned len) | |
321 | { | |
322 | struct fwnet_fragment_info *fi, *fi2, *new; | |
c76acec6 JF |
323 | struct list_head *list; |
324 | ||
f91e3bd8 SR |
325 | list = &pd->fi_list; |
326 | list_for_each_entry(fi, &pd->fi_list, fi_link) { | |
c76acec6 JF |
327 | if (fi->offset + fi->len == offset) { |
328 | /* The new fragment can be tacked on to the end */ | |
329 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
330 | fi2 = list_entry(fi->fi_link.next, |
331 | struct fwnet_fragment_info, fi_link); | |
c76acec6 | 332 | if (fi->offset + fi->len == fi2->offset) { |
c76acec6 JF |
333 | /* glue fragments together */ |
334 | fi->len += len + fi2->len; | |
f91e3bd8 | 335 | list_del(&fi2->fi_link); |
c76acec6 JF |
336 | kfree(fi2); |
337 | } else { | |
c76acec6 JF |
338 | fi->len += len; |
339 | } | |
f91e3bd8 | 340 | |
c76acec6 JF |
341 | return fi; |
342 | } | |
343 | if (offset + len == fi->offset) { | |
344 | /* The new fragment can be tacked on to the beginning */ | |
345 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
346 | fi2 = list_entry(fi->fi_link.prev, |
347 | struct fwnet_fragment_info, fi_link); | |
c76acec6 JF |
348 | if (fi2->offset + fi2->len == fi->offset) { |
349 | /* glue fragments together */ | |
c76acec6 | 350 | fi2->len += fi->len + len; |
f91e3bd8 | 351 | list_del(&fi->fi_link); |
c76acec6 | 352 | kfree(fi); |
f91e3bd8 | 353 | |
c76acec6 JF |
354 | return fi2; |
355 | } | |
c76acec6 JF |
356 | fi->offset = offset; |
357 | fi->len += len; | |
f91e3bd8 | 358 | |
c76acec6 JF |
359 | return fi; |
360 | } | |
361 | if (offset > fi->offset + fi->len) { | |
f91e3bd8 | 362 | list = &fi->fi_link; |
c76acec6 JF |
363 | break; |
364 | } | |
365 | if (offset + len < fi->offset) { | |
f91e3bd8 | 366 | list = fi->fi_link.prev; |
c76acec6 JF |
367 | break; |
368 | } | |
369 | } | |
370 | ||
371 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
372 | if (!new) { | |
f91e3bd8 | 373 | fw_error("out of memory\n"); |
c76acec6 JF |
374 | return NULL; |
375 | } | |
376 | ||
377 | new->offset = offset; | |
378 | new->len = len; | |
f91e3bd8 SR |
379 | list_add(&new->fi_link, list); |
380 | ||
c76acec6 JF |
381 | return new; |
382 | } | |
383 | ||
f91e3bd8 SR |
384 | static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net, |
385 | struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size, | |
386 | void *frag_buf, unsigned frag_off, unsigned frag_len) | |
387 | { | |
388 | struct fwnet_partial_datagram *new; | |
389 | struct fwnet_fragment_info *fi; | |
c76acec6 JF |
390 | |
391 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
392 | if (!new) | |
393 | goto fail; | |
f91e3bd8 SR |
394 | |
395 | INIT_LIST_HEAD(&new->fi_list); | |
396 | fi = fwnet_frag_new(new, frag_off, frag_len); | |
397 | if (fi == NULL) | |
c76acec6 | 398 | goto fail_w_new; |
f91e3bd8 | 399 | |
c76acec6 JF |
400 | new->datagram_label = datagram_label; |
401 | new->datagram_size = dg_size; | |
f91e3bd8 SR |
402 | new->skb = dev_alloc_skb(dg_size + net->hard_header_len + 15); |
403 | if (new->skb == NULL) | |
c76acec6 | 404 | goto fail_w_fi; |
f91e3bd8 SR |
405 | |
406 | skb_reserve(new->skb, (net->hard_header_len + 15) & ~15); | |
c76acec6 JF |
407 | new->pbuf = skb_put(new->skb, dg_size); |
408 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
f91e3bd8 SR |
409 | list_add_tail(&new->pd_link, &peer->pd_list); |
410 | ||
c76acec6 JF |
411 | return new; |
412 | ||
413 | fail_w_fi: | |
414 | kfree(fi); | |
415 | fail_w_new: | |
416 | kfree(new); | |
417 | fail: | |
f91e3bd8 SR |
418 | fw_error("out of memory\n"); |
419 | ||
c76acec6 JF |
420 | return NULL; |
421 | } | |
422 | ||
f91e3bd8 SR |
423 | static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer, |
424 | u16 datagram_label) | |
425 | { | |
426 | struct fwnet_partial_datagram *pd; | |
c76acec6 | 427 | |
f91e3bd8 SR |
428 | list_for_each_entry(pd, &peer->pd_list, pd_link) |
429 | if (pd->datagram_label == datagram_label) | |
c76acec6 | 430 | return pd; |
f91e3bd8 | 431 | |
c76acec6 JF |
432 | return NULL; |
433 | } | |
434 | ||
435 | ||
f91e3bd8 SR |
436 | static void fwnet_pd_delete(struct fwnet_partial_datagram *old) |
437 | { | |
438 | struct fwnet_fragment_info *fi, *n; | |
c76acec6 | 439 | |
f91e3bd8 | 440 | list_for_each_entry_safe(fi, n, &old->fi_list, fi_link) |
c76acec6 | 441 | kfree(fi); |
f91e3bd8 SR |
442 | |
443 | list_del(&old->pd_link); | |
c76acec6 JF |
444 | dev_kfree_skb_any(old->skb); |
445 | kfree(old); | |
446 | } | |
447 | ||
f91e3bd8 SR |
448 | static bool fwnet_pd_update(struct fwnet_peer *peer, |
449 | struct fwnet_partial_datagram *pd, void *frag_buf, | |
450 | unsigned frag_off, unsigned frag_len) | |
451 | { | |
452 | if (fwnet_frag_new(pd, frag_off, frag_len) == NULL) | |
c76acec6 | 453 | return false; |
f91e3bd8 | 454 | |
c76acec6 JF |
455 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
456 | ||
457 | /* | |
458 | * Move list entry to beginnig of list so that oldest partial | |
459 | * datagrams percolate to the end of the list | |
460 | */ | |
f91e3bd8 SR |
461 | list_move_tail(&pd->pd_link, &peer->pd_list); |
462 | ||
c76acec6 JF |
463 | return true; |
464 | } | |
465 | ||
f91e3bd8 SR |
466 | static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd) |
467 | { | |
468 | struct fwnet_fragment_info *fi; | |
c76acec6 | 469 | |
f91e3bd8 | 470 | fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link); |
c76acec6 | 471 | |
f91e3bd8 | 472 | return fi->len == pd->datagram_size; |
c76acec6 JF |
473 | } |
474 | ||
5a124d38 | 475 | /* caller must hold dev->lock */ |
f91e3bd8 SR |
476 | static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev, |
477 | u64 guid) | |
478 | { | |
5a124d38 | 479 | struct fwnet_peer *peer; |
c76acec6 | 480 | |
5a124d38 SR |
481 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
482 | if (peer->guid == guid) | |
483 | return peer; | |
c76acec6 | 484 | |
5a124d38 | 485 | return NULL; |
c76acec6 JF |
486 | } |
487 | ||
5a124d38 | 488 | /* caller must hold dev->lock */ |
f91e3bd8 | 489 | static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev, |
5a124d38 | 490 | int node_id, int generation) |
f91e3bd8 | 491 | { |
5a124d38 | 492 | struct fwnet_peer *peer; |
c76acec6 | 493 | |
5a124d38 SR |
494 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
495 | if (peer->node_id == node_id && | |
496 | peer->generation == generation) | |
497 | return peer; | |
f91e3bd8 | 498 | |
5a124d38 | 499 | return NULL; |
c76acec6 JF |
500 | } |
501 | ||
5a124d38 SR |
502 | /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */ |
503 | static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed) | |
f91e3bd8 | 504 | { |
5a124d38 SR |
505 | max_rec = min(max_rec, speed + 8); |
506 | max_rec = min(max_rec, 0xbU); /* <= 4096 */ | |
507 | if (max_rec < 8) { | |
508 | fw_notify("max_rec %x out of range\n", max_rec); | |
509 | max_rec = 8; | |
c76acec6 | 510 | } |
5a124d38 SR |
511 | |
512 | return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; | |
c76acec6 JF |
513 | } |
514 | ||
5a124d38 | 515 | |
f91e3bd8 SR |
516 | static int fwnet_finish_incoming_packet(struct net_device *net, |
517 | struct sk_buff *skb, u16 source_node_id, | |
518 | bool is_broadcast, u16 ether_type) | |
519 | { | |
520 | struct fwnet_device *dev; | |
521 | static const __be64 broadcast_hw = cpu_to_be64(~0ULL); | |
c76acec6 | 522 | int status; |
f91e3bd8 | 523 | __be64 guid; |
c76acec6 | 524 | |
f91e3bd8 | 525 | dev = netdev_priv(net); |
c76acec6 | 526 | /* Write metadata, and then pass to the receive level */ |
f91e3bd8 | 527 | skb->dev = net; |
c76acec6 JF |
528 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ |
529 | ||
530 | /* | |
531 | * Parse the encapsulation header. This actually does the job of | |
532 | * converting to an ethernet frame header, as well as arp | |
533 | * conversion if needed. ARP conversion is easier in this | |
534 | * direction, since we are using ethernet as our backend. | |
535 | */ | |
536 | /* | |
537 | * If this is an ARP packet, convert it. First, we want to make | |
538 | * use of some of the fields, since they tell us a little bit | |
539 | * about the sending machine. | |
540 | */ | |
541 | if (ether_type == ETH_P_ARP) { | |
f91e3bd8 | 542 | struct rfc2734_arp *arp1394; |
c76acec6 JF |
543 | struct arphdr *arp; |
544 | unsigned char *arp_ptr; | |
545 | u64 fifo_addr; | |
f91e3bd8 | 546 | u64 peer_guid; |
5a124d38 | 547 | unsigned sspd; |
c76acec6 | 548 | u16 max_payload; |
f91e3bd8 | 549 | struct fwnet_peer *peer; |
5a124d38 SR |
550 | unsigned long flags; |
551 | ||
552 | arp1394 = (struct rfc2734_arp *)skb->data; | |
553 | arp = (struct arphdr *)skb->data; | |
554 | arp_ptr = (unsigned char *)(arp + 1); | |
555 | peer_guid = get_unaligned_be64(&arp1394->s_uniq_id); | |
556 | fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32 | |
557 | | get_unaligned_be32(&arp1394->fifo_lo); | |
c76acec6 | 558 | |
c76acec6 | 559 | sspd = arp1394->sspd; |
f91e3bd8 SR |
560 | /* Sanity check. OS X 10.3 PPC reportedly sends 131. */ |
561 | if (sspd > SCODE_3200) { | |
562 | fw_notify("sspd %x out of range\n", sspd); | |
5a124d38 | 563 | sspd = SCODE_3200; |
c76acec6 | 564 | } |
5a124d38 | 565 | max_payload = fwnet_max_payload(arp1394->max_rec, sspd); |
c76acec6 | 566 | |
5a124d38 | 567 | spin_lock_irqsave(&dev->lock, flags); |
f91e3bd8 | 568 | peer = fwnet_peer_find_by_guid(dev, peer_guid); |
5a124d38 SR |
569 | if (peer) { |
570 | peer->fifo = fifo_addr; | |
571 | ||
572 | if (peer->speed > sspd) | |
573 | peer->speed = sspd; | |
574 | if (peer->max_payload > max_payload) | |
575 | peer->max_payload = max_payload; | |
576 | } | |
577 | spin_unlock_irqrestore(&dev->lock, flags); | |
578 | ||
f91e3bd8 SR |
579 | if (!peer) { |
580 | fw_notify("No peer for ARP packet from %016llx\n", | |
581 | (unsigned long long)peer_guid); | |
1bf145fe | 582 | goto no_peer; |
c76acec6 | 583 | } |
f91e3bd8 | 584 | |
c76acec6 JF |
585 | /* |
586 | * Now that we're done with the 1394 specific stuff, we'll | |
587 | * need to alter some of the data. Believe it or not, all | |
588 | * that needs to be done is sender_IP_address needs to be | |
589 | * moved, the destination hardware address get stuffed | |
590 | * in and the hardware address length set to 8. | |
591 | * | |
592 | * IMPORTANT: The code below overwrites 1394 specific data | |
593 | * needed above so keep the munging of the data for the | |
594 | * higher level IP stack last. | |
595 | */ | |
596 | ||
597 | arp->ar_hln = 8; | |
f91e3bd8 SR |
598 | /* skip over sender unique id */ |
599 | arp_ptr += arp->ar_hln; | |
600 | /* move sender IP addr */ | |
601 | put_unaligned(arp1394->sip, (u32 *)arp_ptr); | |
602 | /* skip over sender IP addr */ | |
603 | arp_ptr += arp->ar_pln; | |
c76acec6 JF |
604 | |
605 | if (arp->ar_op == htons(ARPOP_REQUEST)) | |
606 | memset(arp_ptr, 0, sizeof(u64)); | |
607 | else | |
f91e3bd8 | 608 | memcpy(arp_ptr, net->dev_addr, sizeof(u64)); |
c76acec6 JF |
609 | } |
610 | ||
611 | /* Now add the ethernet header. */ | |
f91e3bd8 SR |
612 | guid = cpu_to_be64(dev->card->guid); |
613 | if (dev_hard_header(skb, net, ether_type, | |
614 | is_broadcast ? &broadcast_hw : &guid, | |
615 | NULL, skb->len) >= 0) { | |
616 | struct fwnet_header *eth; | |
c76acec6 JF |
617 | u16 *rawp; |
618 | __be16 protocol; | |
619 | ||
620 | skb_reset_mac_header(skb); | |
621 | skb_pull(skb, sizeof(*eth)); | |
f91e3bd8 | 622 | eth = (struct fwnet_header *)skb_mac_header(skb); |
c76acec6 | 623 | if (*eth->h_dest & 1) { |
f91e3bd8 SR |
624 | if (memcmp(eth->h_dest, net->broadcast, |
625 | net->addr_len) == 0) | |
c76acec6 | 626 | skb->pkt_type = PACKET_BROADCAST; |
c76acec6 JF |
627 | #if 0 |
628 | else | |
629 | skb->pkt_type = PACKET_MULTICAST; | |
630 | #endif | |
631 | } else { | |
156ce867 | 632 | if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) |
c76acec6 | 633 | skb->pkt_type = PACKET_OTHERHOST; |
c76acec6 JF |
634 | } |
635 | if (ntohs(eth->h_proto) >= 1536) { | |
c76acec6 JF |
636 | protocol = eth->h_proto; |
637 | } else { | |
638 | rawp = (u16 *)skb->data; | |
f91e3bd8 | 639 | if (*rawp == 0xffff) |
c76acec6 | 640 | protocol = htons(ETH_P_802_3); |
f91e3bd8 | 641 | else |
c76acec6 | 642 | protocol = htons(ETH_P_802_2); |
c76acec6 JF |
643 | } |
644 | skb->protocol = protocol; | |
645 | } | |
646 | status = netif_rx(skb); | |
f91e3bd8 SR |
647 | if (status == NET_RX_DROP) { |
648 | net->stats.rx_errors++; | |
649 | net->stats.rx_dropped++; | |
c76acec6 | 650 | } else { |
f91e3bd8 SR |
651 | net->stats.rx_packets++; |
652 | net->stats.rx_bytes += skb->len; | |
c76acec6 | 653 | } |
f91e3bd8 SR |
654 | if (netif_queue_stopped(net)) |
655 | netif_wake_queue(net); | |
656 | ||
c76acec6 JF |
657 | return 0; |
658 | ||
1bf145fe | 659 | no_peer: |
f91e3bd8 SR |
660 | net->stats.rx_errors++; |
661 | net->stats.rx_dropped++; | |
662 | ||
c76acec6 | 663 | dev_kfree_skb_any(skb); |
f91e3bd8 SR |
664 | if (netif_queue_stopped(net)) |
665 | netif_wake_queue(net); | |
666 | ||
1bf145fe | 667 | return -ENOENT; |
c76acec6 JF |
668 | } |
669 | ||
f91e3bd8 | 670 | static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, |
5a124d38 SR |
671 | int source_node_id, int generation, |
672 | bool is_broadcast) | |
f91e3bd8 | 673 | { |
c76acec6 | 674 | struct sk_buff *skb; |
5a124d38 | 675 | struct net_device *net = dev->netdev; |
f91e3bd8 | 676 | struct rfc2734_header hdr; |
c76acec6 JF |
677 | unsigned lf; |
678 | unsigned long flags; | |
f91e3bd8 SR |
679 | struct fwnet_peer *peer; |
680 | struct fwnet_partial_datagram *pd; | |
c76acec6 JF |
681 | int fg_off; |
682 | int dg_size; | |
683 | u16 datagram_label; | |
684 | int retval; | |
685 | u16 ether_type; | |
686 | ||
f91e3bd8 SR |
687 | hdr.w0 = be32_to_cpu(buf[0]); |
688 | lf = fwnet_get_hdr_lf(&hdr); | |
689 | if (lf == RFC2374_HDR_UNFRAG) { | |
c76acec6 JF |
690 | /* |
691 | * An unfragmented datagram has been received by the ieee1394 | |
692 | * bus. Build an skbuff around it so we can pass it to the | |
693 | * high level network layer. | |
694 | */ | |
f91e3bd8 | 695 | ether_type = fwnet_get_hdr_ether_type(&hdr); |
c76acec6 | 696 | buf++; |
f91e3bd8 | 697 | len -= RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 | 698 | |
f91e3bd8 | 699 | skb = dev_alloc_skb(len + net->hard_header_len + 15); |
c76acec6 | 700 | if (unlikely(!skb)) { |
f91e3bd8 SR |
701 | fw_error("out of memory\n"); |
702 | net->stats.rx_dropped++; | |
703 | ||
1bf145fe | 704 | return -ENOMEM; |
c76acec6 | 705 | } |
f91e3bd8 SR |
706 | skb_reserve(skb, (net->hard_header_len + 15) & ~15); |
707 | memcpy(skb_put(skb, len), buf, len); | |
708 | ||
709 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
710 | is_broadcast, ether_type); | |
c76acec6 JF |
711 | } |
712 | /* A datagram fragment has been received, now the fun begins. */ | |
713 | hdr.w1 = ntohl(buf[1]); | |
f91e3bd8 SR |
714 | buf += 2; |
715 | len -= RFC2374_FRAG_HDR_SIZE; | |
716 | if (lf == RFC2374_HDR_FIRSTFRAG) { | |
717 | ether_type = fwnet_get_hdr_ether_type(&hdr); | |
c76acec6 JF |
718 | fg_off = 0; |
719 | } else { | |
f91e3bd8 SR |
720 | ether_type = 0; |
721 | fg_off = fwnet_get_hdr_fg_off(&hdr); | |
c76acec6 | 722 | } |
f91e3bd8 SR |
723 | datagram_label = fwnet_get_hdr_dgl(&hdr); |
724 | dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */ | |
f91e3bd8 | 725 | |
5a124d38 SR |
726 | spin_lock_irqsave(&dev->lock, flags); |
727 | ||
728 | peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); | |
1bf145fe SR |
729 | if (!peer) { |
730 | retval = -ENOENT; | |
731 | goto fail; | |
732 | } | |
f91e3bd8 SR |
733 | |
734 | pd = fwnet_pd_find(peer, datagram_label); | |
c76acec6 | 735 | if (pd == NULL) { |
f91e3bd8 | 736 | while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { |
c76acec6 | 737 | /* remove the oldest */ |
f91e3bd8 SR |
738 | fwnet_pd_delete(list_first_entry(&peer->pd_list, |
739 | struct fwnet_partial_datagram, pd_link)); | |
740 | peer->pdg_size--; | |
c76acec6 | 741 | } |
f91e3bd8 SR |
742 | pd = fwnet_pd_new(net, peer, datagram_label, |
743 | dg_size, buf, fg_off, len); | |
744 | if (pd == NULL) { | |
c76acec6 | 745 | retval = -ENOMEM; |
1bf145fe | 746 | goto fail; |
c76acec6 | 747 | } |
f91e3bd8 | 748 | peer->pdg_size++; |
c76acec6 | 749 | } else { |
f91e3bd8 SR |
750 | if (fwnet_frag_overlap(pd, fg_off, len) || |
751 | pd->datagram_size != dg_size) { | |
c76acec6 JF |
752 | /* |
753 | * Differing datagram sizes or overlapping fragments, | |
f91e3bd8 | 754 | * discard old datagram and start a new one. |
c76acec6 | 755 | */ |
f91e3bd8 SR |
756 | fwnet_pd_delete(pd); |
757 | pd = fwnet_pd_new(net, peer, datagram_label, | |
758 | dg_size, buf, fg_off, len); | |
759 | if (pd == NULL) { | |
f91e3bd8 | 760 | peer->pdg_size--; |
1bf145fe SR |
761 | retval = -ENOMEM; |
762 | goto fail; | |
c76acec6 JF |
763 | } |
764 | } else { | |
f91e3bd8 | 765 | if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { |
c76acec6 JF |
766 | /* |
767 | * Couldn't save off fragment anyway | |
768 | * so might as well obliterate the | |
769 | * datagram now. | |
770 | */ | |
f91e3bd8 SR |
771 | fwnet_pd_delete(pd); |
772 | peer->pdg_size--; | |
1bf145fe SR |
773 | retval = -ENOMEM; |
774 | goto fail; | |
c76acec6 JF |
775 | } |
776 | } | |
777 | } /* new datagram or add to existing one */ | |
778 | ||
f91e3bd8 | 779 | if (lf == RFC2374_HDR_FIRSTFRAG) |
c76acec6 | 780 | pd->ether_type = ether_type; |
f91e3bd8 SR |
781 | |
782 | if (fwnet_pd_is_complete(pd)) { | |
c76acec6 | 783 | ether_type = pd->ether_type; |
f91e3bd8 | 784 | peer->pdg_size--; |
c76acec6 | 785 | skb = skb_get(pd->skb); |
f91e3bd8 SR |
786 | fwnet_pd_delete(pd); |
787 | ||
5a124d38 | 788 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
789 | |
790 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
791 | false, ether_type); | |
c76acec6 JF |
792 | } |
793 | /* | |
794 | * Datagram is not complete, we're done for the | |
795 | * moment. | |
796 | */ | |
5a124d38 | 797 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 | 798 | |
c76acec6 | 799 | return 0; |
1bf145fe | 800 | fail: |
5a124d38 | 801 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
802 | |
803 | if (netif_queue_stopped(net)) | |
804 | netif_wake_queue(net); | |
805 | ||
1bf145fe | 806 | return retval; |
c76acec6 JF |
807 | } |
808 | ||
f91e3bd8 SR |
809 | static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |
810 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
811 | unsigned long long offset, void *payload, size_t length, |
812 | void *callback_data) | |
f91e3bd8 | 813 | { |
00635b8e SR |
814 | struct fwnet_device *dev = callback_data; |
815 | int rcode; | |
c76acec6 | 816 | |
00635b8e SR |
817 | if (destination == IEEE1394_ALL_NODES) { |
818 | kfree(r); | |
f91e3bd8 | 819 | |
c76acec6 JF |
820 | return; |
821 | } | |
f91e3bd8 | 822 | |
00635b8e SR |
823 | if (offset != dev->handler.offset) |
824 | rcode = RCODE_ADDRESS_ERROR; | |
825 | else if (tcode != TCODE_WRITE_BLOCK_REQUEST) | |
826 | rcode = RCODE_TYPE_ERROR; | |
827 | else if (fwnet_incoming_packet(dev, payload, length, | |
828 | source, generation, false) != 0) { | |
f91e3bd8 | 829 | fw_error("Incoming packet failure\n"); |
00635b8e SR |
830 | rcode = RCODE_CONFLICT_ERROR; |
831 | } else | |
832 | rcode = RCODE_COMPLETE; | |
f91e3bd8 | 833 | |
00635b8e | 834 | fw_send_response(card, r, rcode); |
c76acec6 JF |
835 | } |
836 | ||
f91e3bd8 SR |
837 | static void fwnet_receive_broadcast(struct fw_iso_context *context, |
838 | u32 cycle, size_t header_length, void *header, void *data) | |
839 | { | |
840 | struct fwnet_device *dev; | |
c76acec6 JF |
841 | struct fw_iso_packet packet; |
842 | struct fw_card *card; | |
f91e3bd8 SR |
843 | __be16 *hdr_ptr; |
844 | __be32 *buf_ptr; | |
c76acec6 JF |
845 | int retval; |
846 | u32 length; | |
847 | u16 source_node_id; | |
848 | u32 specifier_id; | |
849 | u32 ver; | |
850 | unsigned long offset; | |
851 | unsigned long flags; | |
852 | ||
f91e3bd8 SR |
853 | dev = data; |
854 | card = dev->card; | |
c76acec6 | 855 | hdr_ptr = header; |
f91e3bd8 SR |
856 | length = be16_to_cpup(hdr_ptr); |
857 | ||
858 | spin_lock_irqsave(&dev->lock, flags); | |
859 | ||
860 | offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; | |
861 | buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; | |
862 | if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) | |
863 | dev->broadcast_rcv_next_ptr = 0; | |
864 | ||
865 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
866 | |
867 | specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 | |
868 | | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; | |
f91e3bd8 | 869 | ver = be32_to_cpu(buf_ptr[1]) & 0xffffff; |
c76acec6 | 870 | source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; |
f91e3bd8 SR |
871 | |
872 | if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) { | |
c76acec6 | 873 | buf_ptr += 2; |
f91e3bd8 SR |
874 | length -= IEEE1394_GASP_HDR_SIZE; |
875 | fwnet_incoming_packet(dev, buf_ptr, length, | |
5a124d38 | 876 | source_node_id, -1, true); |
f91e3bd8 SR |
877 | } |
878 | ||
879 | packet.payload_length = dev->rcv_buffer_size; | |
c76acec6 JF |
880 | packet.interrupt = 1; |
881 | packet.skip = 0; | |
882 | packet.tag = 3; | |
883 | packet.sy = 0; | |
f91e3bd8 SR |
884 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
885 | ||
886 | spin_lock_irqsave(&dev->lock, flags); | |
c76acec6 | 887 | |
f91e3bd8 SR |
888 | retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, |
889 | &dev->broadcast_rcv_buffer, offset); | |
890 | ||
891 | spin_unlock_irqrestore(&dev->lock, flags); | |
892 | ||
893 | if (retval < 0) | |
894 | fw_error("requeue failed\n"); | |
c76acec6 JF |
895 | } |
896 | ||
f91e3bd8 SR |
897 | static struct kmem_cache *fwnet_packet_task_cache; |
898 | ||
110f82d7 SR |
899 | static void fwnet_free_ptask(struct fwnet_packet_task *ptask) |
900 | { | |
901 | dev_kfree_skb_any(ptask->skb); | |
902 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
903 | } | |
904 | ||
f91e3bd8 SR |
905 | static int fwnet_send_packet(struct fwnet_packet_task *ptask); |
906 | ||
907 | static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) | |
908 | { | |
110f82d7 | 909 | struct fwnet_device *dev = ptask->dev; |
c76acec6 | 910 | unsigned long flags; |
110f82d7 | 911 | bool free; |
f91e3bd8 SR |
912 | |
913 | spin_lock_irqsave(&dev->lock, flags); | |
f91e3bd8 | 914 | |
110f82d7 SR |
915 | ptask->outstanding_pkts--; |
916 | ||
917 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
918 | free = (ptask->outstanding_pkts == 0 && !list_empty(&ptask->pt_link)); | |
919 | ||
920 | if (ptask->outstanding_pkts == 0) | |
921 | list_del(&ptask->pt_link); | |
922 | ||
923 | spin_unlock_irqrestore(&dev->lock, flags); | |
f91e3bd8 SR |
924 | |
925 | if (ptask->outstanding_pkts > 0) { | |
c76acec6 JF |
926 | u16 dg_size; |
927 | u16 fg_off; | |
928 | u16 datagram_label; | |
929 | u16 lf; | |
930 | struct sk_buff *skb; | |
931 | ||
932 | /* Update the ptask to point to the next fragment and send it */ | |
f91e3bd8 | 933 | lf = fwnet_get_hdr_lf(&ptask->hdr); |
c76acec6 | 934 | switch (lf) { |
f91e3bd8 SR |
935 | case RFC2374_HDR_LASTFRAG: |
936 | case RFC2374_HDR_UNFRAG: | |
c76acec6 | 937 | default: |
f91e3bd8 SR |
938 | fw_error("Outstanding packet %x lf %x, header %x,%x\n", |
939 | ptask->outstanding_pkts, lf, ptask->hdr.w0, | |
940 | ptask->hdr.w1); | |
c76acec6 JF |
941 | BUG(); |
942 | ||
f91e3bd8 | 943 | case RFC2374_HDR_FIRSTFRAG: |
c76acec6 | 944 | /* Set frag type here for future interior fragments */ |
f91e3bd8 SR |
945 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); |
946 | fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
947 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
948 | break; |
949 | ||
f91e3bd8 SR |
950 | case RFC2374_HDR_INTFRAG: |
951 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); | |
952 | fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) | |
953 | + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
954 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
955 | break; |
956 | } | |
957 | skb = ptask->skb; | |
f91e3bd8 SR |
958 | skb_pull(skb, ptask->max_payload); |
959 | if (ptask->outstanding_pkts > 1) { | |
960 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, | |
961 | dg_size, fg_off, datagram_label); | |
c76acec6 | 962 | } else { |
f91e3bd8 SR |
963 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, |
964 | dg_size, fg_off, datagram_label); | |
965 | ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; | |
c76acec6 | 966 | } |
f91e3bd8 | 967 | fwnet_send_packet(ptask); |
c76acec6 | 968 | } |
110f82d7 SR |
969 | |
970 | if (free) | |
971 | fwnet_free_ptask(ptask); | |
c76acec6 JF |
972 | } |
973 | ||
f91e3bd8 SR |
974 | static void fwnet_write_complete(struct fw_card *card, int rcode, |
975 | void *payload, size_t length, void *data) | |
976 | { | |
977 | struct fwnet_packet_task *ptask; | |
c76acec6 JF |
978 | |
979 | ptask = data; | |
c76acec6 | 980 | |
f91e3bd8 SR |
981 | if (rcode == RCODE_COMPLETE) |
982 | fwnet_transmit_packet_done(ptask); | |
983 | else | |
984 | fw_error("fwnet_write_complete: failed: %x\n", rcode); | |
c76acec6 | 985 | /* ??? error recovery */ |
c76acec6 JF |
986 | } |
987 | ||
f91e3bd8 SR |
988 | static int fwnet_send_packet(struct fwnet_packet_task *ptask) |
989 | { | |
990 | struct fwnet_device *dev; | |
c76acec6 | 991 | unsigned tx_len; |
f91e3bd8 | 992 | struct rfc2734_header *bufhdr; |
c76acec6 | 993 | unsigned long flags; |
110f82d7 | 994 | bool free; |
c76acec6 | 995 | |
f91e3bd8 | 996 | dev = ptask->dev; |
c76acec6 | 997 | tx_len = ptask->max_payload; |
f91e3bd8 SR |
998 | switch (fwnet_get_hdr_lf(&ptask->hdr)) { |
999 | case RFC2374_HDR_UNFRAG: | |
1000 | bufhdr = (struct rfc2734_header *) | |
1001 | skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); | |
1002 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
c76acec6 JF |
1003 | break; |
1004 | ||
f91e3bd8 SR |
1005 | case RFC2374_HDR_FIRSTFRAG: |
1006 | case RFC2374_HDR_INTFRAG: | |
1007 | case RFC2374_HDR_LASTFRAG: | |
1008 | bufhdr = (struct rfc2734_header *) | |
1009 | skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); | |
1010 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
1011 | put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); | |
c76acec6 JF |
1012 | break; |
1013 | ||
1014 | default: | |
1015 | BUG(); | |
1016 | } | |
f91e3bd8 SR |
1017 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
1018 | u8 *p; | |
c76acec6 | 1019 | int generation; |
f91e3bd8 | 1020 | int node_id; |
c76acec6 JF |
1021 | |
1022 | /* ptask->generation may not have been set yet */ | |
f91e3bd8 | 1023 | generation = dev->card->generation; |
c76acec6 | 1024 | smp_rmb(); |
f91e3bd8 SR |
1025 | node_id = dev->card->node_id; |
1026 | ||
1027 | p = skb_push(ptask->skb, 8); | |
1028 | put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); | |
1029 | put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 | |
1030 | | RFC2734_SW_VERSION, &p[4]); | |
1031 | ||
1032 | /* We should not transmit if broadcast_channel.valid == 0. */ | |
1033 | fw_send_request(dev->card, &ptask->transaction, | |
1034 | TCODE_STREAM_DATA, | |
1035 | fw_stream_packet_destination_id(3, | |
1036 | IEEE1394_BROADCAST_CHANNEL, 0), | |
1037 | generation, SCODE_100, 0ULL, ptask->skb->data, | |
1038 | tx_len + 8, fwnet_write_complete, ptask); | |
1039 | ||
f91e3bd8 | 1040 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1041 | |
1042 | /* If the AT tasklet already ran, we may be last user. */ | |
1043 | free = (ptask->outstanding_pkts == 0 && list_empty(&ptask->pt_link)); | |
1044 | if (!free) | |
1045 | list_add_tail(&ptask->pt_link, &dev->broadcasted_list); | |
1046 | ||
f91e3bd8 SR |
1047 | spin_unlock_irqrestore(&dev->lock, flags); |
1048 | ||
110f82d7 | 1049 | goto out; |
c76acec6 | 1050 | } |
f91e3bd8 SR |
1051 | |
1052 | fw_send_request(dev->card, &ptask->transaction, | |
1053 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, | |
1054 | ptask->generation, ptask->speed, ptask->fifo_addr, | |
1055 | ptask->skb->data, tx_len, fwnet_write_complete, ptask); | |
1056 | ||
f91e3bd8 | 1057 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1058 | |
1059 | /* If the AT tasklet already ran, we may be last user. */ | |
1060 | free = (ptask->outstanding_pkts == 0 && list_empty(&ptask->pt_link)); | |
1061 | if (!free) | |
1062 | list_add_tail(&ptask->pt_link, &dev->sent_list); | |
1063 | ||
f91e3bd8 SR |
1064 | spin_unlock_irqrestore(&dev->lock, flags); |
1065 | ||
5a124d38 | 1066 | dev->netdev->trans_start = jiffies; |
110f82d7 SR |
1067 | out: |
1068 | if (free) | |
1069 | fwnet_free_ptask(ptask); | |
f91e3bd8 | 1070 | |
c76acec6 JF |
1071 | return 0; |
1072 | } | |
1073 | ||
f91e3bd8 SR |
1074 | static int fwnet_broadcast_start(struct fwnet_device *dev) |
1075 | { | |
c76acec6 JF |
1076 | struct fw_iso_context *context; |
1077 | int retval; | |
1078 | unsigned num_packets; | |
1079 | unsigned max_receive; | |
1080 | struct fw_iso_packet packet; | |
1081 | unsigned long offset; | |
1082 | unsigned u; | |
c76acec6 | 1083 | |
f91e3bd8 SR |
1084 | if (dev->local_fifo == FWNET_NO_FIFO_ADDR) { |
1085 | /* outside OHCI posted write area? */ | |
1086 | static const struct fw_address_region region = { | |
1087 | .start = 0xffff00000000ULL, | |
1088 | .end = CSR_REGISTER_BASE, | |
1089 | }; | |
1090 | ||
1091 | dev->handler.length = 4096; | |
1092 | dev->handler.address_callback = fwnet_receive_packet; | |
1093 | dev->handler.callback_data = dev; | |
1094 | ||
1095 | retval = fw_core_add_address_handler(&dev->handler, ®ion); | |
1096 | if (retval < 0) | |
c76acec6 | 1097 | goto failed_initial; |
f91e3bd8 SR |
1098 | |
1099 | dev->local_fifo = dev->handler.offset; | |
c76acec6 JF |
1100 | } |
1101 | ||
f91e3bd8 SR |
1102 | max_receive = 1U << (dev->card->max_receive + 1); |
1103 | num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; | |
1104 | ||
1105 | if (!dev->broadcast_rcv_context) { | |
c76acec6 JF |
1106 | void **ptrptr; |
1107 | ||
f91e3bd8 SR |
1108 | context = fw_iso_context_create(dev->card, |
1109 | FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL, | |
1110 | dev->card->link_speed, 8, fwnet_receive_broadcast, dev); | |
c76acec6 JF |
1111 | if (IS_ERR(context)) { |
1112 | retval = PTR_ERR(context); | |
1113 | goto failed_context_create; | |
1114 | } | |
f91e3bd8 SR |
1115 | |
1116 | retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, | |
1117 | dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); | |
1118 | if (retval < 0) | |
c76acec6 | 1119 | goto failed_buffer_init; |
f91e3bd8 SR |
1120 | |
1121 | ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL); | |
1122 | if (!ptrptr) { | |
c76acec6 JF |
1123 | retval = -ENOMEM; |
1124 | goto failed_ptrs_alloc; | |
1125 | } | |
f91e3bd8 SR |
1126 | |
1127 | dev->broadcast_rcv_buffer_ptrs = ptrptr; | |
1128 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { | |
c76acec6 JF |
1129 | void *ptr; |
1130 | unsigned v; | |
1131 | ||
f91e3bd8 SR |
1132 | ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); |
1133 | for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) | |
1134 | *ptrptr++ = (void *) | |
1135 | ((char *)ptr + v * max_receive); | |
c76acec6 | 1136 | } |
f91e3bd8 SR |
1137 | dev->broadcast_rcv_context = context; |
1138 | } else { | |
1139 | context = dev->broadcast_rcv_context; | |
1140 | } | |
c76acec6 JF |
1141 | |
1142 | packet.payload_length = max_receive; | |
1143 | packet.interrupt = 1; | |
1144 | packet.skip = 0; | |
1145 | packet.tag = 3; | |
1146 | packet.sy = 0; | |
f91e3bd8 | 1147 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
c76acec6 | 1148 | offset = 0; |
f91e3bd8 SR |
1149 | |
1150 | for (u = 0; u < num_packets; u++) { | |
1151 | retval = fw_iso_context_queue(context, &packet, | |
1152 | &dev->broadcast_rcv_buffer, offset); | |
1153 | if (retval < 0) | |
c76acec6 | 1154 | goto failed_rcv_queue; |
f91e3bd8 | 1155 | |
c76acec6 JF |
1156 | offset += max_receive; |
1157 | } | |
f91e3bd8 SR |
1158 | dev->num_broadcast_rcv_ptrs = num_packets; |
1159 | dev->rcv_buffer_size = max_receive; | |
1160 | dev->broadcast_rcv_next_ptr = 0U; | |
1161 | retval = fw_iso_context_start(context, -1, 0, | |
1162 | FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ | |
1163 | if (retval < 0) | |
c76acec6 | 1164 | goto failed_rcv_queue; |
f91e3bd8 SR |
1165 | |
1166 | /* FIXME: adjust it according to the min. speed of all known peers? */ | |
1167 | dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 | |
1168 | - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; | |
1169 | dev->broadcast_state = FWNET_BROADCAST_RUNNING; | |
1170 | ||
c76acec6 JF |
1171 | return 0; |
1172 | ||
1173 | failed_rcv_queue: | |
f91e3bd8 SR |
1174 | kfree(dev->broadcast_rcv_buffer_ptrs); |
1175 | dev->broadcast_rcv_buffer_ptrs = NULL; | |
c76acec6 | 1176 | failed_ptrs_alloc: |
f91e3bd8 | 1177 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); |
c76acec6 | 1178 | failed_buffer_init: |
f91e3bd8 SR |
1179 | fw_iso_context_destroy(context); |
1180 | dev->broadcast_rcv_context = NULL; | |
c76acec6 | 1181 | failed_context_create: |
f91e3bd8 | 1182 | fw_core_remove_address_handler(&dev->handler); |
c76acec6 | 1183 | failed_initial: |
f91e3bd8 SR |
1184 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
1185 | ||
c76acec6 JF |
1186 | return retval; |
1187 | } | |
1188 | ||
f91e3bd8 SR |
1189 | /* ifup */ |
1190 | static int fwnet_open(struct net_device *net) | |
1191 | { | |
1192 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1193 | int ret; |
1194 | ||
f91e3bd8 SR |
1195 | if (dev->broadcast_state == FWNET_BROADCAST_ERROR) { |
1196 | ret = fwnet_broadcast_start(dev); | |
c76acec6 JF |
1197 | if (ret) |
1198 | return ret; | |
1199 | } | |
f91e3bd8 SR |
1200 | netif_start_queue(net); |
1201 | ||
c76acec6 JF |
1202 | return 0; |
1203 | } | |
1204 | ||
f91e3bd8 SR |
1205 | /* ifdown */ |
1206 | static int fwnet_stop(struct net_device *net) | |
c76acec6 | 1207 | { |
f91e3bd8 SR |
1208 | netif_stop_queue(net); |
1209 | ||
1210 | /* Deallocate iso context for use by other applications? */ | |
c76acec6 | 1211 | |
c76acec6 JF |
1212 | return 0; |
1213 | } | |
1214 | ||
424efe9c | 1215 | static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) |
c76acec6 | 1216 | { |
f91e3bd8 SR |
1217 | struct fwnet_header hdr_buf; |
1218 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1219 | __be16 proto; |
1220 | u16 dest_node; | |
c76acec6 JF |
1221 | unsigned max_payload; |
1222 | u16 dg_size; | |
1223 | u16 *datagram_label_ptr; | |
f91e3bd8 | 1224 | struct fwnet_packet_task *ptask; |
5a124d38 SR |
1225 | struct fwnet_peer *peer; |
1226 | unsigned long flags; | |
c76acec6 | 1227 | |
f91e3bd8 | 1228 | ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); |
c76acec6 JF |
1229 | if (ptask == NULL) |
1230 | goto fail; | |
1231 | ||
1232 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1233 | if (!skb) | |
1234 | goto fail; | |
1235 | ||
1236 | /* | |
f91e3bd8 | 1237 | * Make a copy of the driver-specific header. |
c76acec6 JF |
1238 | * We might need to rebuild the header on tx failure. |
1239 | */ | |
1240 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
1241 | skb_pull(skb, sizeof(hdr_buf)); | |
1242 | ||
1243 | proto = hdr_buf.h_proto; | |
1244 | dg_size = skb->len; | |
1245 | ||
5a124d38 SR |
1246 | /* serialize access to peer, including peer->datagram_label */ |
1247 | spin_lock_irqsave(&dev->lock, flags); | |
1248 | ||
c76acec6 JF |
1249 | /* |
1250 | * Set the transmission type for the packet. ARP packets and IP | |
1251 | * broadcast packets are sent via GASP. | |
1252 | */ | |
f91e3bd8 | 1253 | if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0 |
c76acec6 | 1254 | || proto == htons(ETH_P_ARP) |
f91e3bd8 SR |
1255 | || (proto == htons(ETH_P_IP) |
1256 | && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { | |
5a124d38 | 1257 | max_payload = dev->broadcast_xmt_max_payload; |
f91e3bd8 SR |
1258 | datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; |
1259 | ||
5a124d38 SR |
1260 | ptask->fifo_addr = FWNET_NO_FIFO_ADDR; |
1261 | ptask->generation = 0; | |
1262 | ptask->dest_node = IEEE1394_ALL_NODES; | |
1263 | ptask->speed = SCODE_100; | |
c76acec6 | 1264 | } else { |
f91e3bd8 | 1265 | __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); |
c76acec6 JF |
1266 | u8 generation; |
1267 | ||
f91e3bd8 | 1268 | peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); |
5a124d38 SR |
1269 | if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR) |
1270 | goto fail_unlock; | |
c76acec6 | 1271 | |
5a124d38 SR |
1272 | generation = peer->generation; |
1273 | dest_node = peer->node_id; | |
1274 | max_payload = peer->max_payload; | |
f91e3bd8 | 1275 | datagram_label_ptr = &peer->datagram_label; |
c76acec6 | 1276 | |
5a124d38 SR |
1277 | ptask->fifo_addr = peer->fifo; |
1278 | ptask->generation = generation; | |
1279 | ptask->dest_node = dest_node; | |
1280 | ptask->speed = peer->speed; | |
c76acec6 JF |
1281 | } |
1282 | ||
1283 | /* If this is an ARP packet, convert it */ | |
1284 | if (proto == htons(ETH_P_ARP)) { | |
c76acec6 JF |
1285 | struct arphdr *arp = (struct arphdr *)skb->data; |
1286 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
f91e3bd8 SR |
1287 | struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data; |
1288 | __be32 ipaddr; | |
1289 | ||
1290 | ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN)); | |
1291 | ||
1292 | arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN; | |
1293 | arp1394->max_rec = dev->card->max_receive; | |
1294 | arp1394->sspd = dev->card->link_speed; | |
1295 | ||
1296 | put_unaligned_be16(dev->local_fifo >> 32, | |
1297 | &arp1394->fifo_hi); | |
1298 | put_unaligned_be32(dev->local_fifo & 0xffffffff, | |
1299 | &arp1394->fifo_lo); | |
1300 | put_unaligned(ipaddr, &arp1394->sip); | |
c76acec6 | 1301 | } |
c76acec6 JF |
1302 | |
1303 | ptask->hdr.w0 = 0; | |
1304 | ptask->hdr.w1 = 0; | |
1305 | ptask->skb = skb; | |
f91e3bd8 SR |
1306 | ptask->dev = dev; |
1307 | ||
c76acec6 | 1308 | /* Does it all fit in one packet? */ |
f91e3bd8 SR |
1309 | if (dg_size <= max_payload) { |
1310 | fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); | |
c76acec6 | 1311 | ptask->outstanding_pkts = 1; |
f91e3bd8 | 1312 | max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 JF |
1313 | } else { |
1314 | u16 datagram_label; | |
1315 | ||
f91e3bd8 | 1316 | max_payload -= RFC2374_FRAG_OVERHEAD; |
c76acec6 | 1317 | datagram_label = (*datagram_label_ptr)++; |
f91e3bd8 SR |
1318 | fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, |
1319 | datagram_label); | |
c76acec6 | 1320 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
f91e3bd8 | 1321 | max_payload += RFC2374_FRAG_HDR_SIZE; |
c76acec6 | 1322 | } |
5a124d38 SR |
1323 | |
1324 | spin_unlock_irqrestore(&dev->lock, flags); | |
1325 | ||
c76acec6 | 1326 | ptask->max_payload = max_payload; |
110f82d7 SR |
1327 | INIT_LIST_HEAD(&ptask->pt_link); |
1328 | ||
f91e3bd8 SR |
1329 | fwnet_send_packet(ptask); |
1330 | ||
c76acec6 JF |
1331 | return NETDEV_TX_OK; |
1332 | ||
5a124d38 SR |
1333 | fail_unlock: |
1334 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
1335 | fail: |
1336 | if (ptask) | |
f91e3bd8 | 1337 | kmem_cache_free(fwnet_packet_task_cache, ptask); |
c76acec6 JF |
1338 | |
1339 | if (skb != NULL) | |
1340 | dev_kfree_skb(skb); | |
1341 | ||
f91e3bd8 SR |
1342 | net->stats.tx_dropped++; |
1343 | net->stats.tx_errors++; | |
c76acec6 JF |
1344 | |
1345 | /* | |
1346 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1347 | * causes serious problems" here, allegedly. Before that patch, | |
1348 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1349 | * Perhaps more needs to be done? Stop the queue in serious | |
1350 | * conditions and restart it elsewhere? | |
1351 | */ | |
1352 | return NETDEV_TX_OK; | |
1353 | } | |
1354 | ||
f91e3bd8 SR |
1355 | static int fwnet_change_mtu(struct net_device *net, int new_mtu) |
1356 | { | |
c76acec6 JF |
1357 | if (new_mtu < 68) |
1358 | return -EINVAL; | |
1359 | ||
f91e3bd8 | 1360 | net->mtu = new_mtu; |
c76acec6 JF |
1361 | return 0; |
1362 | } | |
1363 | ||
f91e3bd8 SR |
1364 | static void fwnet_get_drvinfo(struct net_device *net, |
1365 | struct ethtool_drvinfo *info) | |
1366 | { | |
1367 | strcpy(info->driver, KBUILD_MODNAME); | |
1368 | strcpy(info->bus_info, "ieee1394"); | |
c76acec6 JF |
1369 | } |
1370 | ||
0fc0b732 | 1371 | static const struct ethtool_ops fwnet_ethtool_ops = { |
f91e3bd8 | 1372 | .get_drvinfo = fwnet_get_drvinfo, |
c76acec6 JF |
1373 | }; |
1374 | ||
f91e3bd8 SR |
1375 | static const struct net_device_ops fwnet_netdev_ops = { |
1376 | .ndo_open = fwnet_open, | |
1377 | .ndo_stop = fwnet_stop, | |
1378 | .ndo_start_xmit = fwnet_tx, | |
f91e3bd8 | 1379 | .ndo_change_mtu = fwnet_change_mtu, |
c76acec6 JF |
1380 | }; |
1381 | ||
f91e3bd8 SR |
1382 | static void fwnet_init_dev(struct net_device *net) |
1383 | { | |
1384 | net->header_ops = &fwnet_header_ops; | |
1385 | net->netdev_ops = &fwnet_netdev_ops; | |
1337f853 | 1386 | net->watchdog_timeo = 2 * HZ; |
f91e3bd8 SR |
1387 | net->flags = IFF_BROADCAST | IFF_MULTICAST; |
1388 | net->features = NETIF_F_HIGHDMA; | |
1389 | net->addr_len = FWNET_ALEN; | |
1390 | net->hard_header_len = FWNET_HLEN; | |
1391 | net->type = ARPHRD_IEEE1394; | |
1337f853 | 1392 | net->tx_queue_len = 10; |
f91e3bd8 | 1393 | SET_ETHTOOL_OPS(net, &fwnet_ethtool_ops); |
c76acec6 JF |
1394 | } |
1395 | ||
5a124d38 SR |
1396 | /* caller must hold fwnet_device_mutex */ |
1397 | static struct fwnet_device *fwnet_dev_find(struct fw_card *card) | |
1398 | { | |
1399 | struct fwnet_device *dev; | |
1400 | ||
1401 | list_for_each_entry(dev, &fwnet_device_list, dev_link) | |
1402 | if (dev->card == card) | |
1403 | return dev; | |
1404 | ||
1405 | return NULL; | |
1406 | } | |
1407 | ||
1408 | static int fwnet_add_peer(struct fwnet_device *dev, | |
1409 | struct fw_unit *unit, struct fw_device *device) | |
1410 | { | |
1411 | struct fwnet_peer *peer; | |
1412 | ||
1413 | peer = kmalloc(sizeof(*peer), GFP_KERNEL); | |
1414 | if (!peer) | |
1415 | return -ENOMEM; | |
1416 | ||
b01b4bab SR |
1417 | dev_set_drvdata(&unit->device, peer); |
1418 | ||
5a124d38 SR |
1419 | peer->dev = dev; |
1420 | peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; | |
1421 | peer->fifo = FWNET_NO_FIFO_ADDR; | |
1422 | INIT_LIST_HEAD(&peer->pd_list); | |
1423 | peer->pdg_size = 0; | |
1424 | peer->datagram_label = 0; | |
1425 | peer->speed = device->max_speed; | |
1426 | peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); | |
1427 | ||
1428 | peer->generation = device->generation; | |
1429 | smp_rmb(); | |
1430 | peer->node_id = device->node_id; | |
1431 | ||
1432 | spin_lock_irq(&dev->lock); | |
1433 | list_add_tail(&peer->peer_link, &dev->peer_list); | |
1434 | spin_unlock_irq(&dev->lock); | |
1435 | ||
1436 | return 0; | |
1437 | } | |
1438 | ||
f91e3bd8 SR |
1439 | static int fwnet_probe(struct device *_dev) |
1440 | { | |
1441 | struct fw_unit *unit = fw_unit(_dev); | |
1442 | struct fw_device *device = fw_parent_device(unit); | |
1443 | struct fw_card *card = device->card; | |
1444 | struct net_device *net; | |
b01b4bab | 1445 | bool allocated_netdev = false; |
f91e3bd8 | 1446 | struct fwnet_device *dev; |
c76acec6 | 1447 | unsigned max_mtu; |
5a124d38 | 1448 | int ret; |
c76acec6 | 1449 | |
5a124d38 | 1450 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1451 | |
5a124d38 SR |
1452 | dev = fwnet_dev_find(card); |
1453 | if (dev) { | |
5a124d38 SR |
1454 | net = dev->netdev; |
1455 | goto have_dev; | |
c76acec6 | 1456 | } |
5a124d38 | 1457 | |
f91e3bd8 SR |
1458 | net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev); |
1459 | if (net == NULL) { | |
5a124d38 | 1460 | ret = -ENOMEM; |
c76acec6 JF |
1461 | goto out; |
1462 | } | |
1463 | ||
b01b4bab | 1464 | allocated_netdev = true; |
f91e3bd8 SR |
1465 | SET_NETDEV_DEV(net, card->device); |
1466 | dev = netdev_priv(net); | |
c76acec6 | 1467 | |
f91e3bd8 SR |
1468 | spin_lock_init(&dev->lock); |
1469 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1470 | dev->broadcast_rcv_context = NULL; | |
1471 | dev->broadcast_xmt_max_payload = 0; | |
1472 | dev->broadcast_xmt_datagramlabel = 0; | |
c76acec6 | 1473 | |
f91e3bd8 | 1474 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
c76acec6 | 1475 | |
f91e3bd8 SR |
1476 | INIT_LIST_HEAD(&dev->packet_list); |
1477 | INIT_LIST_HEAD(&dev->broadcasted_list); | |
1478 | INIT_LIST_HEAD(&dev->sent_list); | |
5a124d38 | 1479 | INIT_LIST_HEAD(&dev->peer_list); |
c76acec6 | 1480 | |
f91e3bd8 | 1481 | dev->card = card; |
5a124d38 | 1482 | dev->netdev = net; |
c76acec6 JF |
1483 | |
1484 | /* | |
1485 | * Use the RFC 2734 default 1500 octets or the maximum payload | |
1486 | * as initial MTU | |
1487 | */ | |
1488 | max_mtu = (1 << (card->max_receive + 1)) | |
f91e3bd8 SR |
1489 | - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; |
1490 | net->mtu = min(1500U, max_mtu); | |
c76acec6 JF |
1491 | |
1492 | /* Set our hardware address while we're at it */ | |
f91e3bd8 SR |
1493 | put_unaligned_be64(card->guid, net->dev_addr); |
1494 | put_unaligned_be64(~0ULL, net->broadcast); | |
5a124d38 SR |
1495 | ret = register_netdev(net); |
1496 | if (ret) { | |
f91e3bd8 | 1497 | fw_error("Cannot register the driver\n"); |
c76acec6 JF |
1498 | goto out; |
1499 | } | |
1500 | ||
5a124d38 | 1501 | list_add_tail(&dev->dev_link, &fwnet_device_list); |
f91e3bd8 SR |
1502 | fw_notify("%s: IPv4 over FireWire on device %016llx\n", |
1503 | net->name, (unsigned long long)card->guid); | |
5a124d38 SR |
1504 | have_dev: |
1505 | ret = fwnet_add_peer(dev, unit, device); | |
b01b4bab | 1506 | if (ret && allocated_netdev) { |
5a124d38 SR |
1507 | unregister_netdev(net); |
1508 | list_del(&dev->dev_link); | |
1509 | } | |
c76acec6 | 1510 | out: |
b01b4bab | 1511 | if (ret && allocated_netdev) |
f91e3bd8 SR |
1512 | free_netdev(net); |
1513 | ||
5a124d38 SR |
1514 | mutex_unlock(&fwnet_device_mutex); |
1515 | ||
1516 | return ret; | |
1517 | } | |
1518 | ||
1519 | static void fwnet_remove_peer(struct fwnet_peer *peer) | |
1520 | { | |
1521 | struct fwnet_partial_datagram *pd, *pd_next; | |
1522 | ||
1523 | spin_lock_irq(&peer->dev->lock); | |
1524 | list_del(&peer->peer_link); | |
1525 | spin_unlock_irq(&peer->dev->lock); | |
1526 | ||
1527 | list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) | |
1528 | fwnet_pd_delete(pd); | |
1529 | ||
1530 | kfree(peer); | |
c76acec6 JF |
1531 | } |
1532 | ||
f91e3bd8 SR |
1533 | static int fwnet_remove(struct device *_dev) |
1534 | { | |
b01b4bab | 1535 | struct fwnet_peer *peer = dev_get_drvdata(_dev); |
5a124d38 | 1536 | struct fwnet_device *dev = peer->dev; |
f91e3bd8 | 1537 | struct net_device *net; |
f91e3bd8 SR |
1538 | struct fwnet_packet_task *ptask, *pt_next; |
1539 | ||
5a124d38 | 1540 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1541 | |
5a124d38 | 1542 | fwnet_remove_peer(peer); |
f91e3bd8 | 1543 | |
5a124d38 SR |
1544 | if (list_empty(&dev->peer_list)) { |
1545 | net = dev->netdev; | |
f91e3bd8 SR |
1546 | unregister_netdev(net); |
1547 | ||
1548 | if (dev->local_fifo != FWNET_NO_FIFO_ADDR) | |
1549 | fw_core_remove_address_handler(&dev->handler); | |
1550 | if (dev->broadcast_rcv_context) { | |
1551 | fw_iso_context_stop(dev->broadcast_rcv_context); | |
1552 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, | |
1553 | dev->card); | |
1554 | fw_iso_context_destroy(dev->broadcast_rcv_context); | |
c76acec6 | 1555 | } |
f91e3bd8 SR |
1556 | list_for_each_entry_safe(ptask, pt_next, |
1557 | &dev->packet_list, pt_link) { | |
1558 | dev_kfree_skb_any(ptask->skb); | |
1559 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
c76acec6 | 1560 | } |
f91e3bd8 SR |
1561 | list_for_each_entry_safe(ptask, pt_next, |
1562 | &dev->broadcasted_list, pt_link) { | |
1563 | dev_kfree_skb_any(ptask->skb); | |
1564 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
c76acec6 | 1565 | } |
f91e3bd8 SR |
1566 | list_for_each_entry_safe(ptask, pt_next, |
1567 | &dev->sent_list, pt_link) { | |
1568 | dev_kfree_skb_any(ptask->skb); | |
1569 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
c76acec6 | 1570 | } |
b01b4bab SR |
1571 | list_del(&dev->dev_link); |
1572 | ||
f91e3bd8 | 1573 | free_netdev(net); |
c76acec6 | 1574 | } |
f91e3bd8 | 1575 | |
5a124d38 SR |
1576 | mutex_unlock(&fwnet_device_mutex); |
1577 | ||
c76acec6 JF |
1578 | return 0; |
1579 | } | |
1580 | ||
f91e3bd8 SR |
1581 | /* |
1582 | * FIXME abort partially sent fragmented datagrams, | |
1583 | * discard partially received fragmented datagrams | |
1584 | */ | |
1585 | static void fwnet_update(struct fw_unit *unit) | |
1586 | { | |
1587 | struct fw_device *device = fw_parent_device(unit); | |
b01b4bab | 1588 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); |
5a124d38 | 1589 | int generation; |
c76acec6 | 1590 | |
5a124d38 SR |
1591 | generation = device->generation; |
1592 | ||
1593 | spin_lock_irq(&peer->dev->lock); | |
1594 | peer->node_id = device->node_id; | |
1595 | peer->generation = generation; | |
1596 | spin_unlock_irq(&peer->dev->lock); | |
c76acec6 JF |
1597 | } |
1598 | ||
f91e3bd8 SR |
1599 | static const struct ieee1394_device_id fwnet_id_table[] = { |
1600 | { | |
1601 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1602 | IEEE1394_MATCH_VERSION, | |
1603 | .specifier_id = IANA_SPECIFIER_ID, | |
1604 | .version = RFC2734_SW_VERSION, | |
1605 | }, | |
1606 | { } | |
1607 | }; | |
1608 | ||
1609 | static struct fw_driver fwnet_driver = { | |
c76acec6 | 1610 | .driver = { |
f91e3bd8 SR |
1611 | .owner = THIS_MODULE, |
1612 | .name = "net", | |
1613 | .bus = &fw_bus_type, | |
1614 | .probe = fwnet_probe, | |
1615 | .remove = fwnet_remove, | |
c76acec6 | 1616 | }, |
f91e3bd8 SR |
1617 | .update = fwnet_update, |
1618 | .id_table = fwnet_id_table, | |
1619 | }; | |
1620 | ||
1621 | static const u32 rfc2374_unit_directory_data[] = { | |
1622 | 0x00040000, /* directory_length */ | |
1623 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1624 | 0x81000003, /* textual descriptor offset */ | |
1625 | 0x13000001, /* unit_sw_version: RFC 2734 */ | |
1626 | 0x81000005, /* textual descriptor offset */ | |
1627 | 0x00030000, /* descriptor_length */ | |
1628 | 0x00000000, /* text */ | |
1629 | 0x00000000, /* minimal ASCII, en */ | |
1630 | 0x49414e41, /* I A N A */ | |
1631 | 0x00030000, /* descriptor_length */ | |
1632 | 0x00000000, /* text */ | |
1633 | 0x00000000, /* minimal ASCII, en */ | |
1634 | 0x49507634, /* I P v 4 */ | |
1635 | }; | |
1636 | ||
1637 | static struct fw_descriptor rfc2374_unit_directory = { | |
1638 | .length = ARRAY_SIZE(rfc2374_unit_directory_data), | |
1639 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1640 | .data = rfc2374_unit_directory_data | |
c76acec6 JF |
1641 | }; |
1642 | ||
f91e3bd8 SR |
1643 | static int __init fwnet_init(void) |
1644 | { | |
1645 | int err; | |
1646 | ||
1647 | err = fw_core_add_descriptor(&rfc2374_unit_directory); | |
1648 | if (err) | |
1649 | return err; | |
c76acec6 | 1650 | |
f91e3bd8 SR |
1651 | fwnet_packet_task_cache = kmem_cache_create("packet_task", |
1652 | sizeof(struct fwnet_packet_task), 0, 0, NULL); | |
1653 | if (!fwnet_packet_task_cache) { | |
1654 | err = -ENOMEM; | |
1655 | goto out; | |
1656 | } | |
1657 | ||
1658 | err = driver_register(&fwnet_driver.driver); | |
1659 | if (!err) | |
1660 | return 0; | |
1661 | ||
1662 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1663 | out: | |
1664 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
1665 | ||
1666 | return err; | |
c76acec6 | 1667 | } |
f91e3bd8 | 1668 | module_init(fwnet_init); |
c76acec6 | 1669 | |
f91e3bd8 SR |
1670 | static void __exit fwnet_cleanup(void) |
1671 | { | |
1672 | driver_unregister(&fwnet_driver.driver); | |
1673 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1674 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
c76acec6 | 1675 | } |
f91e3bd8 | 1676 | module_exit(fwnet_cleanup); |
c76acec6 | 1677 | |
f91e3bd8 SR |
1678 | MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); |
1679 | MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734"); | |
1680 | MODULE_LICENSE("GPL"); | |
1681 | MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); |