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> |
bf337b15 | 10 | #include <linux/compiler.h> |
48553011 | 11 | #include <linux/delay.h> |
c76acec6 | 12 | #include <linux/device.h> |
c1671470 | 13 | #include <linux/ethtool.h> |
c76acec6 JF |
14 | #include <linux/firewire.h> |
15 | #include <linux/firewire-constants.h> | |
16 | #include <linux/highmem.h> | |
17 | #include <linux/in.h> | |
18 | #include <linux/ip.h> | |
f91e3bd8 | 19 | #include <linux/jiffies.h> |
c76acec6 JF |
20 | #include <linux/mod_devicetable.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/moduleparam.h> | |
5a124d38 | 23 | #include <linux/mutex.h> |
c76acec6 JF |
24 | #include <linux/netdevice.h> |
25 | #include <linux/skbuff.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
5a124d38 | 27 | #include <linux/spinlock.h> |
c76acec6 JF |
28 | |
29 | #include <asm/unaligned.h> | |
30 | #include <net/arp.h> | |
31 | ||
b2268830 SR |
32 | /* rx limits */ |
33 | #define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */ | |
34 | #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2) | |
35 | ||
36 | /* tx limits */ | |
37 | #define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */ | |
38 | #define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */ | |
39 | #define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */ | |
c76acec6 | 40 | |
f91e3bd8 SR |
41 | #define IEEE1394_BROADCAST_CHANNEL 31 |
42 | #define IEEE1394_ALL_NODES (0xffc0 | 0x003f) | |
43 | #define IEEE1394_MAX_PAYLOAD_S100 512 | |
44 | #define FWNET_NO_FIFO_ADDR (~0ULL) | |
c76acec6 | 45 | |
f91e3bd8 SR |
46 | #define IANA_SPECIFIER_ID 0x00005eU |
47 | #define RFC2734_SW_VERSION 0x000001U | |
c76acec6 | 48 | |
f91e3bd8 | 49 | #define IEEE1394_GASP_HDR_SIZE 8 |
c76acec6 | 50 | |
f91e3bd8 SR |
51 | #define RFC2374_UNFRAG_HDR_SIZE 4 |
52 | #define RFC2374_FRAG_HDR_SIZE 8 | |
53 | #define RFC2374_FRAG_OVERHEAD 4 | |
c76acec6 | 54 | |
f91e3bd8 SR |
55 | #define RFC2374_HDR_UNFRAG 0 /* unfragmented */ |
56 | #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */ | |
57 | #define RFC2374_HDR_LASTFRAG 2 /* last fragment */ | |
58 | #define RFC2374_HDR_INTFRAG 3 /* interior fragment */ | |
c76acec6 | 59 | |
f91e3bd8 | 60 | #define RFC2734_HW_ADDR_LEN 16 |
c76acec6 | 61 | |
f91e3bd8 SR |
62 | struct rfc2734_arp { |
63 | __be16 hw_type; /* 0x0018 */ | |
64 | __be16 proto_type; /* 0x0806 */ | |
65 | u8 hw_addr_len; /* 16 */ | |
66 | u8 ip_addr_len; /* 4 */ | |
67 | __be16 opcode; /* ARP Opcode */ | |
68 | /* Above is exactly the same format as struct arphdr */ | |
c76acec6 | 69 | |
f91e3bd8 SR |
70 | __be64 s_uniq_id; /* Sender's 64bit EUI */ |
71 | u8 max_rec; /* Sender's max packet size */ | |
72 | u8 sspd; /* Sender's max speed */ | |
73 | __be16 fifo_hi; /* hi 16bits of sender's FIFO addr */ | |
74 | __be32 fifo_lo; /* lo 32bits of sender's FIFO addr */ | |
75 | __be32 sip; /* Sender's IP Address */ | |
76 | __be32 tip; /* IP Address of requested hw addr */ | |
bf337b15 | 77 | } __packed; |
c76acec6 | 78 | |
f91e3bd8 SR |
79 | /* This header format is specific to this driver implementation. */ |
80 | #define FWNET_ALEN 8 | |
81 | #define FWNET_HLEN 10 | |
82 | struct fwnet_header { | |
83 | u8 h_dest[FWNET_ALEN]; /* destination address */ | |
84 | __be16 h_proto; /* packet type ID field */ | |
bf337b15 | 85 | } __packed; |
c76acec6 | 86 | |
f91e3bd8 SR |
87 | /* IPv4 and IPv6 encapsulation header */ |
88 | struct rfc2734_header { | |
c76acec6 JF |
89 | u32 w0; |
90 | u32 w1; | |
91 | }; | |
92 | ||
f91e3bd8 SR |
93 | #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) |
94 | #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) | |
95 | #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16) | |
96 | #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) | |
97 | #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) | |
c76acec6 | 98 | |
f91e3bd8 SR |
99 | #define fwnet_set_hdr_lf(lf) ((lf) << 30) |
100 | #define fwnet_set_hdr_ether_type(et) (et) | |
101 | #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16) | |
102 | #define fwnet_set_hdr_fg_off(fgo) (fgo) | |
c76acec6 | 103 | |
f91e3bd8 | 104 | #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) |
c76acec6 | 105 | |
f91e3bd8 SR |
106 | static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, |
107 | unsigned ether_type) | |
108 | { | |
109 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) | |
110 | | fwnet_set_hdr_ether_type(ether_type); | |
111 | } | |
c76acec6 | 112 | |
f91e3bd8 SR |
113 | static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, |
114 | unsigned ether_type, unsigned dg_size, unsigned dgl) | |
115 | { | |
116 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) | |
117 | | fwnet_set_hdr_dg_size(dg_size) | |
118 | | fwnet_set_hdr_ether_type(ether_type); | |
119 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
120 | } | |
c76acec6 | 121 | |
f91e3bd8 SR |
122 | static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, |
123 | unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) | |
124 | { | |
125 | hdr->w0 = fwnet_set_hdr_lf(lf) | |
126 | | fwnet_set_hdr_dg_size(dg_size) | |
127 | | fwnet_set_hdr_fg_off(fg_off); | |
128 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
129 | } | |
c76acec6 JF |
130 | |
131 | /* This list keeps track of what parts of the datagram have been filled in */ | |
f91e3bd8 SR |
132 | struct fwnet_fragment_info { |
133 | struct list_head fi_link; | |
c76acec6 JF |
134 | u16 offset; |
135 | u16 len; | |
136 | }; | |
137 | ||
f91e3bd8 SR |
138 | struct fwnet_partial_datagram { |
139 | struct list_head pd_link; | |
140 | struct list_head fi_list; | |
c76acec6 JF |
141 | struct sk_buff *skb; |
142 | /* FIXME Why not use skb->data? */ | |
143 | char *pbuf; | |
144 | u16 datagram_label; | |
145 | u16 ether_type; | |
146 | u16 datagram_size; | |
147 | }; | |
148 | ||
5a124d38 SR |
149 | static DEFINE_MUTEX(fwnet_device_mutex); |
150 | static LIST_HEAD(fwnet_device_list); | |
c76acec6 | 151 | |
f91e3bd8 | 152 | struct fwnet_device { |
5a124d38 | 153 | struct list_head dev_link; |
c76acec6 | 154 | spinlock_t lock; |
f91e3bd8 SR |
155 | enum { |
156 | FWNET_BROADCAST_ERROR, | |
157 | FWNET_BROADCAST_RUNNING, | |
158 | FWNET_BROADCAST_STOPPED, | |
159 | } broadcast_state; | |
c76acec6 JF |
160 | struct fw_iso_context *broadcast_rcv_context; |
161 | struct fw_iso_buffer broadcast_rcv_buffer; | |
162 | void **broadcast_rcv_buffer_ptrs; | |
163 | unsigned broadcast_rcv_next_ptr; | |
164 | unsigned num_broadcast_rcv_ptrs; | |
165 | unsigned rcv_buffer_size; | |
166 | /* | |
167 | * This value is the maximum unfragmented datagram size that can be | |
168 | * sent by the hardware. It already has the GASP overhead and the | |
169 | * unfragmented datagram header overhead calculated into it. | |
170 | */ | |
171 | unsigned broadcast_xmt_max_payload; | |
172 | u16 broadcast_xmt_datagramlabel; | |
173 | ||
174 | /* | |
f91e3bd8 | 175 | * The CSR address that remote nodes must send datagrams to for us to |
c76acec6 JF |
176 | * receive them. |
177 | */ | |
178 | struct fw_address_handler handler; | |
179 | u64 local_fifo; | |
180 | ||
48553011 SR |
181 | /* Number of tx datagrams that have been queued but not yet acked */ |
182 | int queued_datagrams; | |
c76acec6 | 183 | |
c1671470 | 184 | int peer_count; |
5a124d38 | 185 | struct list_head peer_list; |
c76acec6 | 186 | struct fw_card *card; |
5a124d38 SR |
187 | struct net_device *netdev; |
188 | }; | |
189 | ||
190 | struct fwnet_peer { | |
191 | struct list_head peer_link; | |
192 | struct fwnet_device *dev; | |
193 | u64 guid; | |
194 | u64 fifo; | |
74a14504 | 195 | __be32 ip; |
5a124d38 SR |
196 | |
197 | /* guarded by dev->lock */ | |
198 | struct list_head pd_list; /* received partial datagrams */ | |
199 | unsigned pdg_size; /* pd_list size */ | |
200 | ||
201 | u16 datagram_label; /* outgoing datagram label */ | |
48553011 | 202 | u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ |
5a124d38 SR |
203 | int node_id; |
204 | int generation; | |
205 | unsigned speed; | |
c76acec6 JF |
206 | }; |
207 | ||
208 | /* This is our task struct. It's used for the packet complete callback. */ | |
f91e3bd8 | 209 | struct fwnet_packet_task { |
c76acec6 | 210 | struct fw_transaction transaction; |
f91e3bd8 | 211 | struct rfc2734_header hdr; |
c76acec6 | 212 | struct sk_buff *skb; |
f91e3bd8 SR |
213 | struct fwnet_device *dev; |
214 | ||
c76acec6 | 215 | int outstanding_pkts; |
c76acec6 JF |
216 | u64 fifo_addr; |
217 | u16 dest_node; | |
48553011 | 218 | u16 max_payload; |
c76acec6 JF |
219 | u8 generation; |
220 | u8 speed; | |
48553011 | 221 | u8 enqueued; |
c76acec6 JF |
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 | 264 | static int fwnet_header_cache(const struct neighbour *neigh, |
e69dd336 | 265 | struct hh_cache *hh, __be16 type) |
f91e3bd8 SR |
266 | { |
267 | struct net_device *net; | |
268 | struct fwnet_header *h; | |
c76acec6 | 269 | |
e69dd336 | 270 | if (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)); | |
e69dd336 | 274 | h->h_proto = type; |
f91e3bd8 SR |
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 | /* | |
25985edc | 457 | * Move list entry to beginning of list so that oldest partial |
c76acec6 JF |
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 | 504 | max_rec = min(max_rec, speed + 8); |
4ec4a67a | 505 | max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */ |
5a124d38 SR |
506 | |
507 | return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; | |
c76acec6 JF |
508 | } |
509 | ||
5a124d38 | 510 | |
f91e3bd8 SR |
511 | static int fwnet_finish_incoming_packet(struct net_device *net, |
512 | struct sk_buff *skb, u16 source_node_id, | |
513 | bool is_broadcast, u16 ether_type) | |
514 | { | |
515 | struct fwnet_device *dev; | |
516 | static const __be64 broadcast_hw = cpu_to_be64(~0ULL); | |
c76acec6 | 517 | int status; |
f91e3bd8 | 518 | __be64 guid; |
c76acec6 | 519 | |
f91e3bd8 | 520 | dev = netdev_priv(net); |
c76acec6 | 521 | /* Write metadata, and then pass to the receive level */ |
f91e3bd8 | 522 | skb->dev = net; |
c76acec6 JF |
523 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ |
524 | ||
525 | /* | |
526 | * Parse the encapsulation header. This actually does the job of | |
527 | * converting to an ethernet frame header, as well as arp | |
528 | * conversion if needed. ARP conversion is easier in this | |
529 | * direction, since we are using ethernet as our backend. | |
530 | */ | |
531 | /* | |
532 | * If this is an ARP packet, convert it. First, we want to make | |
533 | * use of some of the fields, since they tell us a little bit | |
534 | * about the sending machine. | |
535 | */ | |
536 | if (ether_type == ETH_P_ARP) { | |
f91e3bd8 | 537 | struct rfc2734_arp *arp1394; |
c76acec6 JF |
538 | struct arphdr *arp; |
539 | unsigned char *arp_ptr; | |
540 | u64 fifo_addr; | |
f91e3bd8 | 541 | u64 peer_guid; |
5a124d38 | 542 | unsigned sspd; |
c76acec6 | 543 | u16 max_payload; |
f91e3bd8 | 544 | struct fwnet_peer *peer; |
5a124d38 SR |
545 | unsigned long flags; |
546 | ||
547 | arp1394 = (struct rfc2734_arp *)skb->data; | |
548 | arp = (struct arphdr *)skb->data; | |
549 | arp_ptr = (unsigned char *)(arp + 1); | |
550 | peer_guid = get_unaligned_be64(&arp1394->s_uniq_id); | |
551 | fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32 | |
552 | | get_unaligned_be32(&arp1394->fifo_lo); | |
c76acec6 | 553 | |
c76acec6 | 554 | sspd = arp1394->sspd; |
f91e3bd8 SR |
555 | /* Sanity check. OS X 10.3 PPC reportedly sends 131. */ |
556 | if (sspd > SCODE_3200) { | |
557 | fw_notify("sspd %x out of range\n", sspd); | |
5a124d38 | 558 | sspd = SCODE_3200; |
c76acec6 | 559 | } |
5a124d38 | 560 | max_payload = fwnet_max_payload(arp1394->max_rec, sspd); |
c76acec6 | 561 | |
5a124d38 | 562 | spin_lock_irqsave(&dev->lock, flags); |
f91e3bd8 | 563 | peer = fwnet_peer_find_by_guid(dev, peer_guid); |
5a124d38 SR |
564 | if (peer) { |
565 | peer->fifo = fifo_addr; | |
566 | ||
567 | if (peer->speed > sspd) | |
568 | peer->speed = sspd; | |
569 | if (peer->max_payload > max_payload) | |
570 | peer->max_payload = max_payload; | |
74a14504 ML |
571 | |
572 | peer->ip = arp1394->sip; | |
5a124d38 SR |
573 | } |
574 | spin_unlock_irqrestore(&dev->lock, flags); | |
575 | ||
f91e3bd8 SR |
576 | if (!peer) { |
577 | fw_notify("No peer for ARP packet from %016llx\n", | |
578 | (unsigned long long)peer_guid); | |
1bf145fe | 579 | goto no_peer; |
c76acec6 | 580 | } |
f91e3bd8 | 581 | |
c76acec6 JF |
582 | /* |
583 | * Now that we're done with the 1394 specific stuff, we'll | |
584 | * need to alter some of the data. Believe it or not, all | |
585 | * that needs to be done is sender_IP_address needs to be | |
586 | * moved, the destination hardware address get stuffed | |
587 | * in and the hardware address length set to 8. | |
588 | * | |
589 | * IMPORTANT: The code below overwrites 1394 specific data | |
590 | * needed above so keep the munging of the data for the | |
591 | * higher level IP stack last. | |
592 | */ | |
593 | ||
594 | arp->ar_hln = 8; | |
f91e3bd8 SR |
595 | /* skip over sender unique id */ |
596 | arp_ptr += arp->ar_hln; | |
597 | /* move sender IP addr */ | |
598 | put_unaligned(arp1394->sip, (u32 *)arp_ptr); | |
599 | /* skip over sender IP addr */ | |
600 | arp_ptr += arp->ar_pln; | |
c76acec6 JF |
601 | |
602 | if (arp->ar_op == htons(ARPOP_REQUEST)) | |
603 | memset(arp_ptr, 0, sizeof(u64)); | |
604 | else | |
f91e3bd8 | 605 | memcpy(arp_ptr, net->dev_addr, sizeof(u64)); |
c76acec6 JF |
606 | } |
607 | ||
608 | /* Now add the ethernet header. */ | |
f91e3bd8 SR |
609 | guid = cpu_to_be64(dev->card->guid); |
610 | if (dev_hard_header(skb, net, ether_type, | |
611 | is_broadcast ? &broadcast_hw : &guid, | |
612 | NULL, skb->len) >= 0) { | |
613 | struct fwnet_header *eth; | |
c76acec6 JF |
614 | u16 *rawp; |
615 | __be16 protocol; | |
616 | ||
617 | skb_reset_mac_header(skb); | |
618 | skb_pull(skb, sizeof(*eth)); | |
f91e3bd8 | 619 | eth = (struct fwnet_header *)skb_mac_header(skb); |
c76acec6 | 620 | if (*eth->h_dest & 1) { |
f91e3bd8 SR |
621 | if (memcmp(eth->h_dest, net->broadcast, |
622 | net->addr_len) == 0) | |
c76acec6 | 623 | skb->pkt_type = PACKET_BROADCAST; |
c76acec6 JF |
624 | #if 0 |
625 | else | |
626 | skb->pkt_type = PACKET_MULTICAST; | |
627 | #endif | |
628 | } else { | |
156ce867 | 629 | if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) |
c76acec6 | 630 | skb->pkt_type = PACKET_OTHERHOST; |
c76acec6 JF |
631 | } |
632 | if (ntohs(eth->h_proto) >= 1536) { | |
c76acec6 JF |
633 | protocol = eth->h_proto; |
634 | } else { | |
635 | rawp = (u16 *)skb->data; | |
f91e3bd8 | 636 | if (*rawp == 0xffff) |
c76acec6 | 637 | protocol = htons(ETH_P_802_3); |
f91e3bd8 | 638 | else |
c76acec6 | 639 | protocol = htons(ETH_P_802_2); |
c76acec6 JF |
640 | } |
641 | skb->protocol = protocol; | |
642 | } | |
643 | status = netif_rx(skb); | |
f91e3bd8 SR |
644 | if (status == NET_RX_DROP) { |
645 | net->stats.rx_errors++; | |
646 | net->stats.rx_dropped++; | |
c76acec6 | 647 | } else { |
f91e3bd8 SR |
648 | net->stats.rx_packets++; |
649 | net->stats.rx_bytes += skb->len; | |
c76acec6 | 650 | } |
f91e3bd8 | 651 | |
c76acec6 JF |
652 | return 0; |
653 | ||
1bf145fe | 654 | no_peer: |
f91e3bd8 SR |
655 | net->stats.rx_errors++; |
656 | net->stats.rx_dropped++; | |
657 | ||
c76acec6 | 658 | dev_kfree_skb_any(skb); |
f91e3bd8 | 659 | |
1bf145fe | 660 | return -ENOENT; |
c76acec6 JF |
661 | } |
662 | ||
f91e3bd8 | 663 | static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, |
5a124d38 SR |
664 | int source_node_id, int generation, |
665 | bool is_broadcast) | |
f91e3bd8 | 666 | { |
c76acec6 | 667 | struct sk_buff *skb; |
5a124d38 | 668 | struct net_device *net = dev->netdev; |
f91e3bd8 | 669 | struct rfc2734_header hdr; |
c76acec6 JF |
670 | unsigned lf; |
671 | unsigned long flags; | |
f91e3bd8 SR |
672 | struct fwnet_peer *peer; |
673 | struct fwnet_partial_datagram *pd; | |
c76acec6 JF |
674 | int fg_off; |
675 | int dg_size; | |
676 | u16 datagram_label; | |
677 | int retval; | |
678 | u16 ether_type; | |
679 | ||
f91e3bd8 SR |
680 | hdr.w0 = be32_to_cpu(buf[0]); |
681 | lf = fwnet_get_hdr_lf(&hdr); | |
682 | if (lf == RFC2374_HDR_UNFRAG) { | |
c76acec6 JF |
683 | /* |
684 | * An unfragmented datagram has been received by the ieee1394 | |
685 | * bus. Build an skbuff around it so we can pass it to the | |
686 | * high level network layer. | |
687 | */ | |
f91e3bd8 | 688 | ether_type = fwnet_get_hdr_ether_type(&hdr); |
c76acec6 | 689 | buf++; |
f91e3bd8 | 690 | len -= RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 | 691 | |
f91e3bd8 | 692 | skb = dev_alloc_skb(len + net->hard_header_len + 15); |
c76acec6 | 693 | if (unlikely(!skb)) { |
f91e3bd8 SR |
694 | fw_error("out of memory\n"); |
695 | net->stats.rx_dropped++; | |
696 | ||
1bf145fe | 697 | return -ENOMEM; |
c76acec6 | 698 | } |
f91e3bd8 SR |
699 | skb_reserve(skb, (net->hard_header_len + 15) & ~15); |
700 | memcpy(skb_put(skb, len), buf, len); | |
701 | ||
702 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
703 | is_broadcast, ether_type); | |
c76acec6 JF |
704 | } |
705 | /* A datagram fragment has been received, now the fun begins. */ | |
706 | hdr.w1 = ntohl(buf[1]); | |
f91e3bd8 SR |
707 | buf += 2; |
708 | len -= RFC2374_FRAG_HDR_SIZE; | |
709 | if (lf == RFC2374_HDR_FIRSTFRAG) { | |
710 | ether_type = fwnet_get_hdr_ether_type(&hdr); | |
c76acec6 JF |
711 | fg_off = 0; |
712 | } else { | |
f91e3bd8 SR |
713 | ether_type = 0; |
714 | fg_off = fwnet_get_hdr_fg_off(&hdr); | |
c76acec6 | 715 | } |
f91e3bd8 SR |
716 | datagram_label = fwnet_get_hdr_dgl(&hdr); |
717 | dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */ | |
f91e3bd8 | 718 | |
5a124d38 SR |
719 | spin_lock_irqsave(&dev->lock, flags); |
720 | ||
721 | peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); | |
1bf145fe SR |
722 | if (!peer) { |
723 | retval = -ENOENT; | |
724 | goto fail; | |
725 | } | |
f91e3bd8 SR |
726 | |
727 | pd = fwnet_pd_find(peer, datagram_label); | |
c76acec6 | 728 | if (pd == NULL) { |
f91e3bd8 | 729 | while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { |
c76acec6 | 730 | /* remove the oldest */ |
f91e3bd8 SR |
731 | fwnet_pd_delete(list_first_entry(&peer->pd_list, |
732 | struct fwnet_partial_datagram, pd_link)); | |
733 | peer->pdg_size--; | |
c76acec6 | 734 | } |
f91e3bd8 SR |
735 | pd = fwnet_pd_new(net, peer, datagram_label, |
736 | dg_size, buf, fg_off, len); | |
737 | if (pd == NULL) { | |
c76acec6 | 738 | retval = -ENOMEM; |
1bf145fe | 739 | goto fail; |
c76acec6 | 740 | } |
f91e3bd8 | 741 | peer->pdg_size++; |
c76acec6 | 742 | } else { |
f91e3bd8 SR |
743 | if (fwnet_frag_overlap(pd, fg_off, len) || |
744 | pd->datagram_size != dg_size) { | |
c76acec6 JF |
745 | /* |
746 | * Differing datagram sizes or overlapping fragments, | |
f91e3bd8 | 747 | * discard old datagram and start a new one. |
c76acec6 | 748 | */ |
f91e3bd8 SR |
749 | fwnet_pd_delete(pd); |
750 | pd = fwnet_pd_new(net, peer, datagram_label, | |
751 | dg_size, buf, fg_off, len); | |
752 | if (pd == NULL) { | |
f91e3bd8 | 753 | peer->pdg_size--; |
1bf145fe SR |
754 | retval = -ENOMEM; |
755 | goto fail; | |
c76acec6 JF |
756 | } |
757 | } else { | |
f91e3bd8 | 758 | if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { |
c76acec6 JF |
759 | /* |
760 | * Couldn't save off fragment anyway | |
761 | * so might as well obliterate the | |
762 | * datagram now. | |
763 | */ | |
f91e3bd8 SR |
764 | fwnet_pd_delete(pd); |
765 | peer->pdg_size--; | |
1bf145fe SR |
766 | retval = -ENOMEM; |
767 | goto fail; | |
c76acec6 JF |
768 | } |
769 | } | |
770 | } /* new datagram or add to existing one */ | |
771 | ||
f91e3bd8 | 772 | if (lf == RFC2374_HDR_FIRSTFRAG) |
c76acec6 | 773 | pd->ether_type = ether_type; |
f91e3bd8 SR |
774 | |
775 | if (fwnet_pd_is_complete(pd)) { | |
c76acec6 | 776 | ether_type = pd->ether_type; |
f91e3bd8 | 777 | peer->pdg_size--; |
c76acec6 | 778 | skb = skb_get(pd->skb); |
f91e3bd8 SR |
779 | fwnet_pd_delete(pd); |
780 | ||
5a124d38 | 781 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
782 | |
783 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
784 | false, ether_type); | |
c76acec6 JF |
785 | } |
786 | /* | |
787 | * Datagram is not complete, we're done for the | |
788 | * moment. | |
789 | */ | |
b2268830 | 790 | retval = 0; |
1bf145fe | 791 | fail: |
5a124d38 | 792 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 | 793 | |
1bf145fe | 794 | return retval; |
c76acec6 JF |
795 | } |
796 | ||
f91e3bd8 SR |
797 | static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |
798 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
799 | unsigned long long offset, void *payload, size_t length, |
800 | void *callback_data) | |
f91e3bd8 | 801 | { |
00635b8e SR |
802 | struct fwnet_device *dev = callback_data; |
803 | int rcode; | |
c76acec6 | 804 | |
00635b8e SR |
805 | if (destination == IEEE1394_ALL_NODES) { |
806 | kfree(r); | |
f91e3bd8 | 807 | |
c76acec6 JF |
808 | return; |
809 | } | |
f91e3bd8 | 810 | |
00635b8e SR |
811 | if (offset != dev->handler.offset) |
812 | rcode = RCODE_ADDRESS_ERROR; | |
813 | else if (tcode != TCODE_WRITE_BLOCK_REQUEST) | |
814 | rcode = RCODE_TYPE_ERROR; | |
815 | else if (fwnet_incoming_packet(dev, payload, length, | |
816 | source, generation, false) != 0) { | |
f91e3bd8 | 817 | fw_error("Incoming packet failure\n"); |
00635b8e SR |
818 | rcode = RCODE_CONFLICT_ERROR; |
819 | } else | |
820 | rcode = RCODE_COMPLETE; | |
f91e3bd8 | 821 | |
00635b8e | 822 | fw_send_response(card, r, rcode); |
c76acec6 JF |
823 | } |
824 | ||
f91e3bd8 SR |
825 | static void fwnet_receive_broadcast(struct fw_iso_context *context, |
826 | u32 cycle, size_t header_length, void *header, void *data) | |
827 | { | |
828 | struct fwnet_device *dev; | |
c76acec6 JF |
829 | struct fw_iso_packet packet; |
830 | struct fw_card *card; | |
f91e3bd8 SR |
831 | __be16 *hdr_ptr; |
832 | __be32 *buf_ptr; | |
c76acec6 JF |
833 | int retval; |
834 | u32 length; | |
835 | u16 source_node_id; | |
836 | u32 specifier_id; | |
837 | u32 ver; | |
838 | unsigned long offset; | |
839 | unsigned long flags; | |
840 | ||
f91e3bd8 SR |
841 | dev = data; |
842 | card = dev->card; | |
c76acec6 | 843 | hdr_ptr = header; |
f91e3bd8 SR |
844 | length = be16_to_cpup(hdr_ptr); |
845 | ||
846 | spin_lock_irqsave(&dev->lock, flags); | |
847 | ||
848 | offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; | |
849 | buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; | |
850 | if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) | |
851 | dev->broadcast_rcv_next_ptr = 0; | |
852 | ||
853 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
854 | |
855 | specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 | |
856 | | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; | |
f91e3bd8 | 857 | ver = be32_to_cpu(buf_ptr[1]) & 0xffffff; |
c76acec6 | 858 | source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; |
f91e3bd8 SR |
859 | |
860 | if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) { | |
c76acec6 | 861 | buf_ptr += 2; |
f91e3bd8 SR |
862 | length -= IEEE1394_GASP_HDR_SIZE; |
863 | fwnet_incoming_packet(dev, buf_ptr, length, | |
5a124d38 | 864 | source_node_id, -1, true); |
f91e3bd8 SR |
865 | } |
866 | ||
867 | packet.payload_length = dev->rcv_buffer_size; | |
c76acec6 JF |
868 | packet.interrupt = 1; |
869 | packet.skip = 0; | |
870 | packet.tag = 3; | |
871 | packet.sy = 0; | |
f91e3bd8 SR |
872 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
873 | ||
874 | spin_lock_irqsave(&dev->lock, flags); | |
c76acec6 | 875 | |
f91e3bd8 SR |
876 | retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, |
877 | &dev->broadcast_rcv_buffer, offset); | |
878 | ||
879 | spin_unlock_irqrestore(&dev->lock, flags); | |
880 | ||
13882a82 CL |
881 | if (retval >= 0) |
882 | fw_iso_context_queue_flush(dev->broadcast_rcv_context); | |
883 | else | |
f91e3bd8 | 884 | fw_error("requeue failed\n"); |
c76acec6 JF |
885 | } |
886 | ||
f91e3bd8 SR |
887 | static struct kmem_cache *fwnet_packet_task_cache; |
888 | ||
110f82d7 SR |
889 | static void fwnet_free_ptask(struct fwnet_packet_task *ptask) |
890 | { | |
891 | dev_kfree_skb_any(ptask->skb); | |
892 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
893 | } | |
894 | ||
b2268830 SR |
895 | /* Caller must hold dev->lock. */ |
896 | static void dec_queued_datagrams(struct fwnet_device *dev) | |
897 | { | |
898 | if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS) | |
899 | netif_wake_queue(dev->netdev); | |
900 | } | |
901 | ||
f91e3bd8 SR |
902 | static int fwnet_send_packet(struct fwnet_packet_task *ptask); |
903 | ||
904 | static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) | |
905 | { | |
110f82d7 | 906 | struct fwnet_device *dev = ptask->dev; |
902bca00 | 907 | struct sk_buff *skb = ptask->skb; |
c76acec6 | 908 | unsigned long flags; |
110f82d7 | 909 | bool free; |
f91e3bd8 SR |
910 | |
911 | spin_lock_irqsave(&dev->lock, flags); | |
f91e3bd8 | 912 | |
110f82d7 SR |
913 | ptask->outstanding_pkts--; |
914 | ||
915 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 916 | free = (ptask->outstanding_pkts == 0 && ptask->enqueued); |
7ee11fa8 | 917 | if (free) |
b2268830 | 918 | dec_queued_datagrams(dev); |
110f82d7 | 919 | |
902bca00 | 920 | if (ptask->outstanding_pkts == 0) { |
902bca00 SR |
921 | dev->netdev->stats.tx_packets++; |
922 | dev->netdev->stats.tx_bytes += skb->len; | |
923 | } | |
110f82d7 SR |
924 | |
925 | spin_unlock_irqrestore(&dev->lock, flags); | |
f91e3bd8 SR |
926 | |
927 | if (ptask->outstanding_pkts > 0) { | |
c76acec6 JF |
928 | u16 dg_size; |
929 | u16 fg_off; | |
930 | u16 datagram_label; | |
931 | u16 lf; | |
c76acec6 JF |
932 | |
933 | /* Update the ptask to point to the next fragment and send it */ | |
f91e3bd8 | 934 | lf = fwnet_get_hdr_lf(&ptask->hdr); |
c76acec6 | 935 | switch (lf) { |
f91e3bd8 SR |
936 | case RFC2374_HDR_LASTFRAG: |
937 | case RFC2374_HDR_UNFRAG: | |
c76acec6 | 938 | default: |
f91e3bd8 SR |
939 | fw_error("Outstanding packet %x lf %x, header %x,%x\n", |
940 | ptask->outstanding_pkts, lf, ptask->hdr.w0, | |
941 | ptask->hdr.w1); | |
c76acec6 JF |
942 | BUG(); |
943 | ||
f91e3bd8 | 944 | case RFC2374_HDR_FIRSTFRAG: |
c76acec6 | 945 | /* Set frag type here for future interior fragments */ |
f91e3bd8 SR |
946 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); |
947 | fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
948 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
949 | break; |
950 | ||
f91e3bd8 SR |
951 | case RFC2374_HDR_INTFRAG: |
952 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); | |
953 | fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) | |
954 | + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
955 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
956 | break; |
957 | } | |
902bca00 | 958 | |
f91e3bd8 SR |
959 | skb_pull(skb, ptask->max_payload); |
960 | if (ptask->outstanding_pkts > 1) { | |
961 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, | |
962 | dg_size, fg_off, datagram_label); | |
c76acec6 | 963 | } else { |
f91e3bd8 SR |
964 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, |
965 | dg_size, fg_off, datagram_label); | |
966 | ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; | |
c76acec6 | 967 | } |
f91e3bd8 | 968 | fwnet_send_packet(ptask); |
c76acec6 | 969 | } |
110f82d7 SR |
970 | |
971 | if (free) | |
972 | fwnet_free_ptask(ptask); | |
c76acec6 JF |
973 | } |
974 | ||
7ee11fa8 SR |
975 | static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask) |
976 | { | |
977 | struct fwnet_device *dev = ptask->dev; | |
978 | unsigned long flags; | |
979 | bool free; | |
980 | ||
981 | spin_lock_irqsave(&dev->lock, flags); | |
982 | ||
983 | /* One fragment failed; don't try to send remaining fragments. */ | |
984 | ptask->outstanding_pkts = 0; | |
985 | ||
986 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 987 | free = ptask->enqueued; |
7ee11fa8 | 988 | if (free) |
b2268830 | 989 | dec_queued_datagrams(dev); |
7ee11fa8 SR |
990 | |
991 | dev->netdev->stats.tx_dropped++; | |
992 | dev->netdev->stats.tx_errors++; | |
993 | ||
994 | spin_unlock_irqrestore(&dev->lock, flags); | |
995 | ||
996 | if (free) | |
997 | fwnet_free_ptask(ptask); | |
998 | } | |
999 | ||
f91e3bd8 SR |
1000 | static void fwnet_write_complete(struct fw_card *card, int rcode, |
1001 | void *payload, size_t length, void *data) | |
1002 | { | |
c4d6fd40 ML |
1003 | struct fwnet_packet_task *ptask = data; |
1004 | static unsigned long j; | |
1005 | static int last_rcode, errors_skipped; | |
c76acec6 | 1006 | |
7ee11fa8 | 1007 | if (rcode == RCODE_COMPLETE) { |
f91e3bd8 | 1008 | fwnet_transmit_packet_done(ptask); |
7ee11fa8 | 1009 | } else { |
7ee11fa8 | 1010 | fwnet_transmit_packet_failed(ptask); |
c4d6fd40 ML |
1011 | |
1012 | if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) { | |
1013 | fw_error("fwnet_write_complete: " | |
1014 | "failed: %x (skipped %d)\n", rcode, errors_skipped); | |
1015 | ||
1016 | errors_skipped = 0; | |
1017 | last_rcode = rcode; | |
1018 | } else | |
1019 | errors_skipped++; | |
7ee11fa8 | 1020 | } |
c76acec6 JF |
1021 | } |
1022 | ||
f91e3bd8 SR |
1023 | static int fwnet_send_packet(struct fwnet_packet_task *ptask) |
1024 | { | |
1025 | struct fwnet_device *dev; | |
c76acec6 | 1026 | unsigned tx_len; |
f91e3bd8 | 1027 | struct rfc2734_header *bufhdr; |
c76acec6 | 1028 | unsigned long flags; |
110f82d7 | 1029 | bool free; |
c76acec6 | 1030 | |
f91e3bd8 | 1031 | dev = ptask->dev; |
c76acec6 | 1032 | tx_len = ptask->max_payload; |
f91e3bd8 SR |
1033 | switch (fwnet_get_hdr_lf(&ptask->hdr)) { |
1034 | case RFC2374_HDR_UNFRAG: | |
1035 | bufhdr = (struct rfc2734_header *) | |
1036 | skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); | |
1037 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
c76acec6 JF |
1038 | break; |
1039 | ||
f91e3bd8 SR |
1040 | case RFC2374_HDR_FIRSTFRAG: |
1041 | case RFC2374_HDR_INTFRAG: | |
1042 | case RFC2374_HDR_LASTFRAG: | |
1043 | bufhdr = (struct rfc2734_header *) | |
1044 | skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); | |
1045 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
1046 | put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); | |
c76acec6 JF |
1047 | break; |
1048 | ||
1049 | default: | |
1050 | BUG(); | |
1051 | } | |
f91e3bd8 SR |
1052 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
1053 | u8 *p; | |
c76acec6 | 1054 | int generation; |
f91e3bd8 | 1055 | int node_id; |
c76acec6 JF |
1056 | |
1057 | /* ptask->generation may not have been set yet */ | |
f91e3bd8 | 1058 | generation = dev->card->generation; |
c76acec6 | 1059 | smp_rmb(); |
f91e3bd8 SR |
1060 | node_id = dev->card->node_id; |
1061 | ||
1062 | p = skb_push(ptask->skb, 8); | |
1063 | put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); | |
1064 | put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 | |
1065 | | RFC2734_SW_VERSION, &p[4]); | |
1066 | ||
1067 | /* We should not transmit if broadcast_channel.valid == 0. */ | |
1068 | fw_send_request(dev->card, &ptask->transaction, | |
1069 | TCODE_STREAM_DATA, | |
1070 | fw_stream_packet_destination_id(3, | |
1071 | IEEE1394_BROADCAST_CHANNEL, 0), | |
1072 | generation, SCODE_100, 0ULL, ptask->skb->data, | |
1073 | tx_len + 8, fwnet_write_complete, ptask); | |
1074 | ||
f91e3bd8 | 1075 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1076 | |
1077 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1078 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1079 | if (!free) |
48553011 SR |
1080 | ptask->enqueued = true; |
1081 | else | |
b2268830 | 1082 | dec_queued_datagrams(dev); |
110f82d7 | 1083 | |
f91e3bd8 SR |
1084 | spin_unlock_irqrestore(&dev->lock, flags); |
1085 | ||
110f82d7 | 1086 | goto out; |
c76acec6 | 1087 | } |
f91e3bd8 SR |
1088 | |
1089 | fw_send_request(dev->card, &ptask->transaction, | |
1090 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, | |
1091 | ptask->generation, ptask->speed, ptask->fifo_addr, | |
1092 | ptask->skb->data, tx_len, fwnet_write_complete, ptask); | |
1093 | ||
f91e3bd8 | 1094 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1095 | |
1096 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1097 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1098 | if (!free) |
48553011 SR |
1099 | ptask->enqueued = true; |
1100 | else | |
b2268830 | 1101 | dec_queued_datagrams(dev); |
110f82d7 | 1102 | |
f91e3bd8 SR |
1103 | spin_unlock_irqrestore(&dev->lock, flags); |
1104 | ||
5a124d38 | 1105 | dev->netdev->trans_start = jiffies; |
110f82d7 SR |
1106 | out: |
1107 | if (free) | |
1108 | fwnet_free_ptask(ptask); | |
f91e3bd8 | 1109 | |
c76acec6 JF |
1110 | return 0; |
1111 | } | |
1112 | ||
f91e3bd8 SR |
1113 | static int fwnet_broadcast_start(struct fwnet_device *dev) |
1114 | { | |
c76acec6 JF |
1115 | struct fw_iso_context *context; |
1116 | int retval; | |
1117 | unsigned num_packets; | |
1118 | unsigned max_receive; | |
1119 | struct fw_iso_packet packet; | |
1120 | unsigned long offset; | |
1121 | unsigned u; | |
c76acec6 | 1122 | |
f91e3bd8 | 1123 | if (dev->local_fifo == FWNET_NO_FIFO_ADDR) { |
f91e3bd8 SR |
1124 | dev->handler.length = 4096; |
1125 | dev->handler.address_callback = fwnet_receive_packet; | |
1126 | dev->handler.callback_data = dev; | |
1127 | ||
a74477db SG |
1128 | retval = fw_core_add_address_handler(&dev->handler, |
1129 | &fw_high_memory_region); | |
f91e3bd8 | 1130 | if (retval < 0) |
c76acec6 | 1131 | goto failed_initial; |
f91e3bd8 SR |
1132 | |
1133 | dev->local_fifo = dev->handler.offset; | |
c76acec6 JF |
1134 | } |
1135 | ||
f91e3bd8 SR |
1136 | max_receive = 1U << (dev->card->max_receive + 1); |
1137 | num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; | |
1138 | ||
1139 | if (!dev->broadcast_rcv_context) { | |
c76acec6 JF |
1140 | void **ptrptr; |
1141 | ||
f91e3bd8 SR |
1142 | context = fw_iso_context_create(dev->card, |
1143 | FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL, | |
1144 | dev->card->link_speed, 8, fwnet_receive_broadcast, dev); | |
c76acec6 JF |
1145 | if (IS_ERR(context)) { |
1146 | retval = PTR_ERR(context); | |
1147 | goto failed_context_create; | |
1148 | } | |
f91e3bd8 SR |
1149 | |
1150 | retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, | |
1151 | dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); | |
1152 | if (retval < 0) | |
c76acec6 | 1153 | goto failed_buffer_init; |
f91e3bd8 SR |
1154 | |
1155 | ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL); | |
1156 | if (!ptrptr) { | |
c76acec6 JF |
1157 | retval = -ENOMEM; |
1158 | goto failed_ptrs_alloc; | |
1159 | } | |
f91e3bd8 SR |
1160 | |
1161 | dev->broadcast_rcv_buffer_ptrs = ptrptr; | |
1162 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { | |
c76acec6 JF |
1163 | void *ptr; |
1164 | unsigned v; | |
1165 | ||
f91e3bd8 SR |
1166 | ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); |
1167 | for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) | |
1168 | *ptrptr++ = (void *) | |
1169 | ((char *)ptr + v * max_receive); | |
c76acec6 | 1170 | } |
f91e3bd8 SR |
1171 | dev->broadcast_rcv_context = context; |
1172 | } else { | |
1173 | context = dev->broadcast_rcv_context; | |
1174 | } | |
c76acec6 JF |
1175 | |
1176 | packet.payload_length = max_receive; | |
1177 | packet.interrupt = 1; | |
1178 | packet.skip = 0; | |
1179 | packet.tag = 3; | |
1180 | packet.sy = 0; | |
f91e3bd8 | 1181 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
c76acec6 | 1182 | offset = 0; |
f91e3bd8 SR |
1183 | |
1184 | for (u = 0; u < num_packets; u++) { | |
1185 | retval = fw_iso_context_queue(context, &packet, | |
1186 | &dev->broadcast_rcv_buffer, offset); | |
1187 | if (retval < 0) | |
c76acec6 | 1188 | goto failed_rcv_queue; |
f91e3bd8 | 1189 | |
c76acec6 JF |
1190 | offset += max_receive; |
1191 | } | |
f91e3bd8 SR |
1192 | dev->num_broadcast_rcv_ptrs = num_packets; |
1193 | dev->rcv_buffer_size = max_receive; | |
1194 | dev->broadcast_rcv_next_ptr = 0U; | |
1195 | retval = fw_iso_context_start(context, -1, 0, | |
1196 | FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ | |
1197 | if (retval < 0) | |
c76acec6 | 1198 | goto failed_rcv_queue; |
f91e3bd8 SR |
1199 | |
1200 | /* FIXME: adjust it according to the min. speed of all known peers? */ | |
1201 | dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 | |
1202 | - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; | |
1203 | dev->broadcast_state = FWNET_BROADCAST_RUNNING; | |
1204 | ||
c76acec6 JF |
1205 | return 0; |
1206 | ||
1207 | failed_rcv_queue: | |
f91e3bd8 SR |
1208 | kfree(dev->broadcast_rcv_buffer_ptrs); |
1209 | dev->broadcast_rcv_buffer_ptrs = NULL; | |
c76acec6 | 1210 | failed_ptrs_alloc: |
f91e3bd8 | 1211 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); |
c76acec6 | 1212 | failed_buffer_init: |
f91e3bd8 SR |
1213 | fw_iso_context_destroy(context); |
1214 | dev->broadcast_rcv_context = NULL; | |
c76acec6 | 1215 | failed_context_create: |
f91e3bd8 | 1216 | fw_core_remove_address_handler(&dev->handler); |
c76acec6 | 1217 | failed_initial: |
f91e3bd8 SR |
1218 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
1219 | ||
c76acec6 JF |
1220 | return retval; |
1221 | } | |
1222 | ||
c1671470 SR |
1223 | static void set_carrier_state(struct fwnet_device *dev) |
1224 | { | |
1225 | if (dev->peer_count > 1) | |
1226 | netif_carrier_on(dev->netdev); | |
1227 | else | |
1228 | netif_carrier_off(dev->netdev); | |
1229 | } | |
1230 | ||
f91e3bd8 SR |
1231 | /* ifup */ |
1232 | static int fwnet_open(struct net_device *net) | |
1233 | { | |
1234 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1235 | int ret; |
1236 | ||
f91e3bd8 SR |
1237 | if (dev->broadcast_state == FWNET_BROADCAST_ERROR) { |
1238 | ret = fwnet_broadcast_start(dev); | |
c76acec6 JF |
1239 | if (ret) |
1240 | return ret; | |
1241 | } | |
f91e3bd8 SR |
1242 | netif_start_queue(net); |
1243 | ||
c1671470 SR |
1244 | spin_lock_irq(&dev->lock); |
1245 | set_carrier_state(dev); | |
1246 | spin_unlock_irq(&dev->lock); | |
1247 | ||
c76acec6 JF |
1248 | return 0; |
1249 | } | |
1250 | ||
f91e3bd8 SR |
1251 | /* ifdown */ |
1252 | static int fwnet_stop(struct net_device *net) | |
c76acec6 | 1253 | { |
f91e3bd8 SR |
1254 | netif_stop_queue(net); |
1255 | ||
1256 | /* Deallocate iso context for use by other applications? */ | |
c76acec6 | 1257 | |
c76acec6 JF |
1258 | return 0; |
1259 | } | |
1260 | ||
424efe9c | 1261 | static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) |
c76acec6 | 1262 | { |
f91e3bd8 SR |
1263 | struct fwnet_header hdr_buf; |
1264 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1265 | __be16 proto; |
1266 | u16 dest_node; | |
c76acec6 JF |
1267 | unsigned max_payload; |
1268 | u16 dg_size; | |
1269 | u16 *datagram_label_ptr; | |
f91e3bd8 | 1270 | struct fwnet_packet_task *ptask; |
5a124d38 SR |
1271 | struct fwnet_peer *peer; |
1272 | unsigned long flags; | |
c76acec6 | 1273 | |
b2268830 SR |
1274 | spin_lock_irqsave(&dev->lock, flags); |
1275 | ||
1276 | /* Can this happen? */ | |
1277 | if (netif_queue_stopped(dev->netdev)) { | |
1278 | spin_unlock_irqrestore(&dev->lock, flags); | |
1279 | ||
1280 | return NETDEV_TX_BUSY; | |
1281 | } | |
1282 | ||
f91e3bd8 | 1283 | ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); |
c76acec6 JF |
1284 | if (ptask == NULL) |
1285 | goto fail; | |
1286 | ||
1287 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1288 | if (!skb) | |
1289 | goto fail; | |
1290 | ||
1291 | /* | |
f91e3bd8 | 1292 | * Make a copy of the driver-specific header. |
c76acec6 JF |
1293 | * We might need to rebuild the header on tx failure. |
1294 | */ | |
1295 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
1296 | skb_pull(skb, sizeof(hdr_buf)); | |
1297 | ||
1298 | proto = hdr_buf.h_proto; | |
1299 | dg_size = skb->len; | |
1300 | ||
1301 | /* | |
1302 | * Set the transmission type for the packet. ARP packets and IP | |
1303 | * broadcast packets are sent via GASP. | |
1304 | */ | |
f91e3bd8 | 1305 | if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0 |
c76acec6 | 1306 | || proto == htons(ETH_P_ARP) |
f91e3bd8 SR |
1307 | || (proto == htons(ETH_P_IP) |
1308 | && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { | |
5a124d38 | 1309 | max_payload = dev->broadcast_xmt_max_payload; |
f91e3bd8 SR |
1310 | datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; |
1311 | ||
5a124d38 SR |
1312 | ptask->fifo_addr = FWNET_NO_FIFO_ADDR; |
1313 | ptask->generation = 0; | |
1314 | ptask->dest_node = IEEE1394_ALL_NODES; | |
1315 | ptask->speed = SCODE_100; | |
c76acec6 | 1316 | } else { |
f91e3bd8 | 1317 | __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); |
c76acec6 JF |
1318 | u8 generation; |
1319 | ||
f91e3bd8 | 1320 | peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); |
5a124d38 | 1321 | if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR) |
b2268830 | 1322 | goto fail; |
c76acec6 | 1323 | |
5a124d38 SR |
1324 | generation = peer->generation; |
1325 | dest_node = peer->node_id; | |
1326 | max_payload = peer->max_payload; | |
f91e3bd8 | 1327 | datagram_label_ptr = &peer->datagram_label; |
c76acec6 | 1328 | |
5a124d38 SR |
1329 | ptask->fifo_addr = peer->fifo; |
1330 | ptask->generation = generation; | |
1331 | ptask->dest_node = dest_node; | |
1332 | ptask->speed = peer->speed; | |
c76acec6 JF |
1333 | } |
1334 | ||
1335 | /* If this is an ARP packet, convert it */ | |
1336 | if (proto == htons(ETH_P_ARP)) { | |
c76acec6 JF |
1337 | struct arphdr *arp = (struct arphdr *)skb->data; |
1338 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
f91e3bd8 SR |
1339 | struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data; |
1340 | __be32 ipaddr; | |
1341 | ||
1342 | ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN)); | |
1343 | ||
1344 | arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN; | |
1345 | arp1394->max_rec = dev->card->max_receive; | |
1346 | arp1394->sspd = dev->card->link_speed; | |
1347 | ||
1348 | put_unaligned_be16(dev->local_fifo >> 32, | |
1349 | &arp1394->fifo_hi); | |
1350 | put_unaligned_be32(dev->local_fifo & 0xffffffff, | |
1351 | &arp1394->fifo_lo); | |
1352 | put_unaligned(ipaddr, &arp1394->sip); | |
c76acec6 | 1353 | } |
c76acec6 JF |
1354 | |
1355 | ptask->hdr.w0 = 0; | |
1356 | ptask->hdr.w1 = 0; | |
1357 | ptask->skb = skb; | |
f91e3bd8 SR |
1358 | ptask->dev = dev; |
1359 | ||
c76acec6 | 1360 | /* Does it all fit in one packet? */ |
f91e3bd8 SR |
1361 | if (dg_size <= max_payload) { |
1362 | fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); | |
c76acec6 | 1363 | ptask->outstanding_pkts = 1; |
f91e3bd8 | 1364 | max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 JF |
1365 | } else { |
1366 | u16 datagram_label; | |
1367 | ||
f91e3bd8 | 1368 | max_payload -= RFC2374_FRAG_OVERHEAD; |
c76acec6 | 1369 | datagram_label = (*datagram_label_ptr)++; |
f91e3bd8 SR |
1370 | fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, |
1371 | datagram_label); | |
c76acec6 | 1372 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
f91e3bd8 | 1373 | max_payload += RFC2374_FRAG_HDR_SIZE; |
c76acec6 | 1374 | } |
5a124d38 | 1375 | |
b2268830 SR |
1376 | if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS) |
1377 | netif_stop_queue(dev->netdev); | |
48553011 | 1378 | |
5a124d38 SR |
1379 | spin_unlock_irqrestore(&dev->lock, flags); |
1380 | ||
c76acec6 | 1381 | ptask->max_payload = max_payload; |
48553011 | 1382 | ptask->enqueued = 0; |
110f82d7 | 1383 | |
f91e3bd8 SR |
1384 | fwnet_send_packet(ptask); |
1385 | ||
c76acec6 JF |
1386 | return NETDEV_TX_OK; |
1387 | ||
1388 | fail: | |
b2268830 SR |
1389 | spin_unlock_irqrestore(&dev->lock, flags); |
1390 | ||
c76acec6 | 1391 | if (ptask) |
f91e3bd8 | 1392 | kmem_cache_free(fwnet_packet_task_cache, ptask); |
c76acec6 JF |
1393 | |
1394 | if (skb != NULL) | |
1395 | dev_kfree_skb(skb); | |
1396 | ||
f91e3bd8 SR |
1397 | net->stats.tx_dropped++; |
1398 | net->stats.tx_errors++; | |
c76acec6 JF |
1399 | |
1400 | /* | |
1401 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1402 | * causes serious problems" here, allegedly. Before that patch, | |
1403 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1404 | * Perhaps more needs to be done? Stop the queue in serious | |
1405 | * conditions and restart it elsewhere? | |
1406 | */ | |
1407 | return NETDEV_TX_OK; | |
1408 | } | |
1409 | ||
f91e3bd8 SR |
1410 | static int fwnet_change_mtu(struct net_device *net, int new_mtu) |
1411 | { | |
c76acec6 JF |
1412 | if (new_mtu < 68) |
1413 | return -EINVAL; | |
1414 | ||
f91e3bd8 | 1415 | net->mtu = new_mtu; |
c76acec6 JF |
1416 | return 0; |
1417 | } | |
1418 | ||
18bb36f9 ML |
1419 | static const struct ethtool_ops fwnet_ethtool_ops = { |
1420 | .get_link = ethtool_op_get_link, | |
1421 | }; | |
1422 | ||
f91e3bd8 SR |
1423 | static const struct net_device_ops fwnet_netdev_ops = { |
1424 | .ndo_open = fwnet_open, | |
1425 | .ndo_stop = fwnet_stop, | |
1426 | .ndo_start_xmit = fwnet_tx, | |
f91e3bd8 | 1427 | .ndo_change_mtu = fwnet_change_mtu, |
c76acec6 JF |
1428 | }; |
1429 | ||
f91e3bd8 SR |
1430 | static void fwnet_init_dev(struct net_device *net) |
1431 | { | |
1432 | net->header_ops = &fwnet_header_ops; | |
1433 | net->netdev_ops = &fwnet_netdev_ops; | |
1337f853 | 1434 | net->watchdog_timeo = 2 * HZ; |
f91e3bd8 SR |
1435 | net->flags = IFF_BROADCAST | IFF_MULTICAST; |
1436 | net->features = NETIF_F_HIGHDMA; | |
1437 | net->addr_len = FWNET_ALEN; | |
1438 | net->hard_header_len = FWNET_HLEN; | |
1439 | net->type = ARPHRD_IEEE1394; | |
b2268830 | 1440 | net->tx_queue_len = FWNET_TX_QUEUE_LEN; |
18bb36f9 | 1441 | net->ethtool_ops = &fwnet_ethtool_ops; |
c76acec6 JF |
1442 | } |
1443 | ||
5a124d38 SR |
1444 | /* caller must hold fwnet_device_mutex */ |
1445 | static struct fwnet_device *fwnet_dev_find(struct fw_card *card) | |
1446 | { | |
1447 | struct fwnet_device *dev; | |
1448 | ||
1449 | list_for_each_entry(dev, &fwnet_device_list, dev_link) | |
1450 | if (dev->card == card) | |
1451 | return dev; | |
1452 | ||
1453 | return NULL; | |
1454 | } | |
1455 | ||
1456 | static int fwnet_add_peer(struct fwnet_device *dev, | |
1457 | struct fw_unit *unit, struct fw_device *device) | |
1458 | { | |
1459 | struct fwnet_peer *peer; | |
1460 | ||
1461 | peer = kmalloc(sizeof(*peer), GFP_KERNEL); | |
1462 | if (!peer) | |
1463 | return -ENOMEM; | |
1464 | ||
b01b4bab SR |
1465 | dev_set_drvdata(&unit->device, peer); |
1466 | ||
5a124d38 SR |
1467 | peer->dev = dev; |
1468 | peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; | |
1469 | peer->fifo = FWNET_NO_FIFO_ADDR; | |
74a14504 | 1470 | peer->ip = 0; |
5a124d38 SR |
1471 | INIT_LIST_HEAD(&peer->pd_list); |
1472 | peer->pdg_size = 0; | |
1473 | peer->datagram_label = 0; | |
1474 | peer->speed = device->max_speed; | |
1475 | peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); | |
1476 | ||
1477 | peer->generation = device->generation; | |
1478 | smp_rmb(); | |
1479 | peer->node_id = device->node_id; | |
1480 | ||
1481 | spin_lock_irq(&dev->lock); | |
1482 | list_add_tail(&peer->peer_link, &dev->peer_list); | |
18bb36f9 | 1483 | dev->peer_count++; |
c1671470 | 1484 | set_carrier_state(dev); |
5a124d38 SR |
1485 | spin_unlock_irq(&dev->lock); |
1486 | ||
1487 | return 0; | |
1488 | } | |
1489 | ||
f91e3bd8 SR |
1490 | static int fwnet_probe(struct device *_dev) |
1491 | { | |
1492 | struct fw_unit *unit = fw_unit(_dev); | |
1493 | struct fw_device *device = fw_parent_device(unit); | |
1494 | struct fw_card *card = device->card; | |
1495 | struct net_device *net; | |
b01b4bab | 1496 | bool allocated_netdev = false; |
f91e3bd8 | 1497 | struct fwnet_device *dev; |
c76acec6 | 1498 | unsigned max_mtu; |
5a124d38 | 1499 | int ret; |
c76acec6 | 1500 | |
5a124d38 | 1501 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1502 | |
5a124d38 SR |
1503 | dev = fwnet_dev_find(card); |
1504 | if (dev) { | |
5a124d38 SR |
1505 | net = dev->netdev; |
1506 | goto have_dev; | |
c76acec6 | 1507 | } |
5a124d38 | 1508 | |
f91e3bd8 SR |
1509 | net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev); |
1510 | if (net == NULL) { | |
5a124d38 | 1511 | ret = -ENOMEM; |
c76acec6 JF |
1512 | goto out; |
1513 | } | |
1514 | ||
b01b4bab | 1515 | allocated_netdev = true; |
f91e3bd8 SR |
1516 | SET_NETDEV_DEV(net, card->device); |
1517 | dev = netdev_priv(net); | |
c76acec6 | 1518 | |
f91e3bd8 SR |
1519 | spin_lock_init(&dev->lock); |
1520 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1521 | dev->broadcast_rcv_context = NULL; | |
1522 | dev->broadcast_xmt_max_payload = 0; | |
1523 | dev->broadcast_xmt_datagramlabel = 0; | |
f91e3bd8 | 1524 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
48553011 | 1525 | dev->queued_datagrams = 0; |
5a124d38 | 1526 | INIT_LIST_HEAD(&dev->peer_list); |
f91e3bd8 | 1527 | dev->card = card; |
5a124d38 | 1528 | dev->netdev = net; |
c76acec6 JF |
1529 | |
1530 | /* | |
1531 | * Use the RFC 2734 default 1500 octets or the maximum payload | |
1532 | * as initial MTU | |
1533 | */ | |
1534 | max_mtu = (1 << (card->max_receive + 1)) | |
f91e3bd8 SR |
1535 | - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; |
1536 | net->mtu = min(1500U, max_mtu); | |
c76acec6 JF |
1537 | |
1538 | /* Set our hardware address while we're at it */ | |
f91e3bd8 SR |
1539 | put_unaligned_be64(card->guid, net->dev_addr); |
1540 | put_unaligned_be64(~0ULL, net->broadcast); | |
5a124d38 SR |
1541 | ret = register_netdev(net); |
1542 | if (ret) { | |
f91e3bd8 | 1543 | fw_error("Cannot register the driver\n"); |
c76acec6 JF |
1544 | goto out; |
1545 | } | |
1546 | ||
5a124d38 | 1547 | list_add_tail(&dev->dev_link, &fwnet_device_list); |
f91e3bd8 SR |
1548 | fw_notify("%s: IPv4 over FireWire on device %016llx\n", |
1549 | net->name, (unsigned long long)card->guid); | |
5a124d38 SR |
1550 | have_dev: |
1551 | ret = fwnet_add_peer(dev, unit, device); | |
b01b4bab | 1552 | if (ret && allocated_netdev) { |
5a124d38 SR |
1553 | unregister_netdev(net); |
1554 | list_del(&dev->dev_link); | |
1555 | } | |
c76acec6 | 1556 | out: |
b01b4bab | 1557 | if (ret && allocated_netdev) |
f91e3bd8 SR |
1558 | free_netdev(net); |
1559 | ||
5a124d38 SR |
1560 | mutex_unlock(&fwnet_device_mutex); |
1561 | ||
1562 | return ret; | |
1563 | } | |
1564 | ||
c1671470 | 1565 | static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev) |
5a124d38 SR |
1566 | { |
1567 | struct fwnet_partial_datagram *pd, *pd_next; | |
1568 | ||
c1671470 | 1569 | spin_lock_irq(&dev->lock); |
5a124d38 | 1570 | list_del(&peer->peer_link); |
c1671470 SR |
1571 | dev->peer_count--; |
1572 | set_carrier_state(dev); | |
1573 | spin_unlock_irq(&dev->lock); | |
5a124d38 SR |
1574 | |
1575 | list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) | |
1576 | fwnet_pd_delete(pd); | |
1577 | ||
1578 | kfree(peer); | |
c76acec6 JF |
1579 | } |
1580 | ||
f91e3bd8 SR |
1581 | static int fwnet_remove(struct device *_dev) |
1582 | { | |
b01b4bab | 1583 | struct fwnet_peer *peer = dev_get_drvdata(_dev); |
5a124d38 | 1584 | struct fwnet_device *dev = peer->dev; |
f91e3bd8 | 1585 | struct net_device *net; |
48553011 | 1586 | int i; |
f91e3bd8 | 1587 | |
5a124d38 | 1588 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1589 | |
74a14504 ML |
1590 | net = dev->netdev; |
1591 | if (net && peer->ip) | |
1592 | arp_invalidate(net, peer->ip); | |
1593 | ||
c1671470 | 1594 | fwnet_remove_peer(peer, dev); |
18bb36f9 | 1595 | |
5a124d38 | 1596 | if (list_empty(&dev->peer_list)) { |
f91e3bd8 SR |
1597 | unregister_netdev(net); |
1598 | ||
1599 | if (dev->local_fifo != FWNET_NO_FIFO_ADDR) | |
1600 | fw_core_remove_address_handler(&dev->handler); | |
1601 | if (dev->broadcast_rcv_context) { | |
1602 | fw_iso_context_stop(dev->broadcast_rcv_context); | |
1603 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, | |
1604 | dev->card); | |
1605 | fw_iso_context_destroy(dev->broadcast_rcv_context); | |
c76acec6 | 1606 | } |
48553011 SR |
1607 | for (i = 0; dev->queued_datagrams && i < 5; i++) |
1608 | ssleep(1); | |
1609 | WARN_ON(dev->queued_datagrams); | |
b01b4bab SR |
1610 | list_del(&dev->dev_link); |
1611 | ||
f91e3bd8 | 1612 | free_netdev(net); |
c76acec6 | 1613 | } |
f91e3bd8 | 1614 | |
5a124d38 SR |
1615 | mutex_unlock(&fwnet_device_mutex); |
1616 | ||
c76acec6 JF |
1617 | return 0; |
1618 | } | |
1619 | ||
f91e3bd8 SR |
1620 | /* |
1621 | * FIXME abort partially sent fragmented datagrams, | |
1622 | * discard partially received fragmented datagrams | |
1623 | */ | |
1624 | static void fwnet_update(struct fw_unit *unit) | |
1625 | { | |
1626 | struct fw_device *device = fw_parent_device(unit); | |
b01b4bab | 1627 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); |
5a124d38 | 1628 | int generation; |
c76acec6 | 1629 | |
5a124d38 SR |
1630 | generation = device->generation; |
1631 | ||
1632 | spin_lock_irq(&peer->dev->lock); | |
1633 | peer->node_id = device->node_id; | |
1634 | peer->generation = generation; | |
1635 | spin_unlock_irq(&peer->dev->lock); | |
c76acec6 JF |
1636 | } |
1637 | ||
f91e3bd8 SR |
1638 | static const struct ieee1394_device_id fwnet_id_table[] = { |
1639 | { | |
1640 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1641 | IEEE1394_MATCH_VERSION, | |
1642 | .specifier_id = IANA_SPECIFIER_ID, | |
1643 | .version = RFC2734_SW_VERSION, | |
1644 | }, | |
1645 | { } | |
1646 | }; | |
1647 | ||
1648 | static struct fw_driver fwnet_driver = { | |
c76acec6 | 1649 | .driver = { |
f91e3bd8 SR |
1650 | .owner = THIS_MODULE, |
1651 | .name = "net", | |
1652 | .bus = &fw_bus_type, | |
1653 | .probe = fwnet_probe, | |
1654 | .remove = fwnet_remove, | |
c76acec6 | 1655 | }, |
f91e3bd8 SR |
1656 | .update = fwnet_update, |
1657 | .id_table = fwnet_id_table, | |
1658 | }; | |
1659 | ||
1660 | static const u32 rfc2374_unit_directory_data[] = { | |
1661 | 0x00040000, /* directory_length */ | |
1662 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1663 | 0x81000003, /* textual descriptor offset */ | |
1664 | 0x13000001, /* unit_sw_version: RFC 2734 */ | |
1665 | 0x81000005, /* textual descriptor offset */ | |
1666 | 0x00030000, /* descriptor_length */ | |
1667 | 0x00000000, /* text */ | |
1668 | 0x00000000, /* minimal ASCII, en */ | |
1669 | 0x49414e41, /* I A N A */ | |
1670 | 0x00030000, /* descriptor_length */ | |
1671 | 0x00000000, /* text */ | |
1672 | 0x00000000, /* minimal ASCII, en */ | |
1673 | 0x49507634, /* I P v 4 */ | |
1674 | }; | |
1675 | ||
1676 | static struct fw_descriptor rfc2374_unit_directory = { | |
1677 | .length = ARRAY_SIZE(rfc2374_unit_directory_data), | |
1678 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1679 | .data = rfc2374_unit_directory_data | |
c76acec6 JF |
1680 | }; |
1681 | ||
f91e3bd8 SR |
1682 | static int __init fwnet_init(void) |
1683 | { | |
1684 | int err; | |
1685 | ||
1686 | err = fw_core_add_descriptor(&rfc2374_unit_directory); | |
1687 | if (err) | |
1688 | return err; | |
c76acec6 | 1689 | |
f91e3bd8 SR |
1690 | fwnet_packet_task_cache = kmem_cache_create("packet_task", |
1691 | sizeof(struct fwnet_packet_task), 0, 0, NULL); | |
1692 | if (!fwnet_packet_task_cache) { | |
1693 | err = -ENOMEM; | |
1694 | goto out; | |
1695 | } | |
1696 | ||
1697 | err = driver_register(&fwnet_driver.driver); | |
1698 | if (!err) | |
1699 | return 0; | |
1700 | ||
1701 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1702 | out: | |
1703 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
1704 | ||
1705 | return err; | |
c76acec6 | 1706 | } |
f91e3bd8 | 1707 | module_init(fwnet_init); |
c76acec6 | 1708 | |
f91e3bd8 SR |
1709 | static void __exit fwnet_cleanup(void) |
1710 | { | |
1711 | driver_unregister(&fwnet_driver.driver); | |
1712 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1713 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
c76acec6 | 1714 | } |
f91e3bd8 | 1715 | module_exit(fwnet_cleanup); |
c76acec6 | 1716 | |
f91e3bd8 SR |
1717 | MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); |
1718 | MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734"); | |
1719 | MODULE_LICENSE("GPL"); | |
1720 | MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); |