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Commit | Line | Data |
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c76acec6 JF |
1 | /* |
2 | * IPv4 over IEEE 1394, per RFC 2734 | |
3 | * | |
4 | * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com> | |
5 | * | |
6 | * based on eth1394 by Ben Collins et al | |
7 | */ | |
8 | ||
f91e3bd8 | 9 | #include <linux/bug.h> |
48553011 | 10 | #include <linux/delay.h> |
c76acec6 | 11 | #include <linux/device.h> |
c1671470 | 12 | #include <linux/ethtool.h> |
c76acec6 JF |
13 | #include <linux/firewire.h> |
14 | #include <linux/firewire-constants.h> | |
15 | #include <linux/highmem.h> | |
16 | #include <linux/in.h> | |
17 | #include <linux/ip.h> | |
f91e3bd8 | 18 | #include <linux/jiffies.h> |
c76acec6 JF |
19 | #include <linux/mod_devicetable.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/moduleparam.h> | |
5a124d38 | 22 | #include <linux/mutex.h> |
c76acec6 JF |
23 | #include <linux/netdevice.h> |
24 | #include <linux/skbuff.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
5a124d38 | 26 | #include <linux/spinlock.h> |
c76acec6 JF |
27 | |
28 | #include <asm/unaligned.h> | |
29 | #include <net/arp.h> | |
30 | ||
b2268830 SR |
31 | /* rx limits */ |
32 | #define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */ | |
33 | #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2) | |
34 | ||
35 | /* tx limits */ | |
36 | #define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */ | |
37 | #define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */ | |
38 | #define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */ | |
c76acec6 | 39 | |
f91e3bd8 SR |
40 | #define IEEE1394_BROADCAST_CHANNEL 31 |
41 | #define IEEE1394_ALL_NODES (0xffc0 | 0x003f) | |
42 | #define IEEE1394_MAX_PAYLOAD_S100 512 | |
43 | #define FWNET_NO_FIFO_ADDR (~0ULL) | |
c76acec6 | 44 | |
f91e3bd8 SR |
45 | #define IANA_SPECIFIER_ID 0x00005eU |
46 | #define RFC2734_SW_VERSION 0x000001U | |
c76acec6 | 47 | |
f91e3bd8 | 48 | #define IEEE1394_GASP_HDR_SIZE 8 |
c76acec6 | 49 | |
f91e3bd8 SR |
50 | #define RFC2374_UNFRAG_HDR_SIZE 4 |
51 | #define RFC2374_FRAG_HDR_SIZE 8 | |
52 | #define RFC2374_FRAG_OVERHEAD 4 | |
c76acec6 | 53 | |
f91e3bd8 SR |
54 | #define RFC2374_HDR_UNFRAG 0 /* unfragmented */ |
55 | #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */ | |
56 | #define RFC2374_HDR_LASTFRAG 2 /* last fragment */ | |
57 | #define RFC2374_HDR_INTFRAG 3 /* interior fragment */ | |
c76acec6 | 58 | |
f91e3bd8 | 59 | #define RFC2734_HW_ADDR_LEN 16 |
c76acec6 | 60 | |
f91e3bd8 SR |
61 | struct rfc2734_arp { |
62 | __be16 hw_type; /* 0x0018 */ | |
63 | __be16 proto_type; /* 0x0806 */ | |
64 | u8 hw_addr_len; /* 16 */ | |
65 | u8 ip_addr_len; /* 4 */ | |
66 | __be16 opcode; /* ARP Opcode */ | |
67 | /* Above is exactly the same format as struct arphdr */ | |
c76acec6 | 68 | |
f91e3bd8 SR |
69 | __be64 s_uniq_id; /* Sender's 64bit EUI */ |
70 | u8 max_rec; /* Sender's max packet size */ | |
71 | u8 sspd; /* Sender's max speed */ | |
72 | __be16 fifo_hi; /* hi 16bits of sender's FIFO addr */ | |
73 | __be32 fifo_lo; /* lo 32bits of sender's FIFO addr */ | |
74 | __be32 sip; /* Sender's IP Address */ | |
75 | __be32 tip; /* IP Address of requested hw addr */ | |
76 | } __attribute__((packed)); | |
c76acec6 | 77 | |
f91e3bd8 SR |
78 | /* This header format is specific to this driver implementation. */ |
79 | #define FWNET_ALEN 8 | |
80 | #define FWNET_HLEN 10 | |
81 | struct fwnet_header { | |
82 | u8 h_dest[FWNET_ALEN]; /* destination address */ | |
83 | __be16 h_proto; /* packet type ID field */ | |
84 | } __attribute__((packed)); | |
c76acec6 | 85 | |
f91e3bd8 SR |
86 | /* IPv4 and IPv6 encapsulation header */ |
87 | struct rfc2734_header { | |
c76acec6 JF |
88 | u32 w0; |
89 | u32 w1; | |
90 | }; | |
91 | ||
f91e3bd8 SR |
92 | #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) |
93 | #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) | |
94 | #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16) | |
95 | #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) | |
96 | #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) | |
c76acec6 | 97 | |
f91e3bd8 SR |
98 | #define fwnet_set_hdr_lf(lf) ((lf) << 30) |
99 | #define fwnet_set_hdr_ether_type(et) (et) | |
100 | #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16) | |
101 | #define fwnet_set_hdr_fg_off(fgo) (fgo) | |
c76acec6 | 102 | |
f91e3bd8 | 103 | #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) |
c76acec6 | 104 | |
f91e3bd8 SR |
105 | static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, |
106 | unsigned ether_type) | |
107 | { | |
108 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) | |
109 | | fwnet_set_hdr_ether_type(ether_type); | |
110 | } | |
c76acec6 | 111 | |
f91e3bd8 SR |
112 | static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, |
113 | unsigned ether_type, unsigned dg_size, unsigned dgl) | |
114 | { | |
115 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) | |
116 | | fwnet_set_hdr_dg_size(dg_size) | |
117 | | fwnet_set_hdr_ether_type(ether_type); | |
118 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
119 | } | |
c76acec6 | 120 | |
f91e3bd8 SR |
121 | static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, |
122 | unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) | |
123 | { | |
124 | hdr->w0 = fwnet_set_hdr_lf(lf) | |
125 | | fwnet_set_hdr_dg_size(dg_size) | |
126 | | fwnet_set_hdr_fg_off(fg_off); | |
127 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
128 | } | |
c76acec6 JF |
129 | |
130 | /* This list keeps track of what parts of the datagram have been filled in */ | |
f91e3bd8 SR |
131 | struct fwnet_fragment_info { |
132 | struct list_head fi_link; | |
c76acec6 JF |
133 | u16 offset; |
134 | u16 len; | |
135 | }; | |
136 | ||
f91e3bd8 SR |
137 | struct fwnet_partial_datagram { |
138 | struct list_head pd_link; | |
139 | struct list_head fi_list; | |
c76acec6 JF |
140 | struct sk_buff *skb; |
141 | /* FIXME Why not use skb->data? */ | |
142 | char *pbuf; | |
143 | u16 datagram_label; | |
144 | u16 ether_type; | |
145 | u16 datagram_size; | |
146 | }; | |
147 | ||
5a124d38 SR |
148 | static DEFINE_MUTEX(fwnet_device_mutex); |
149 | static LIST_HEAD(fwnet_device_list); | |
c76acec6 | 150 | |
f91e3bd8 | 151 | struct fwnet_device { |
5a124d38 | 152 | struct list_head dev_link; |
c76acec6 | 153 | spinlock_t lock; |
f91e3bd8 SR |
154 | enum { |
155 | FWNET_BROADCAST_ERROR, | |
156 | FWNET_BROADCAST_RUNNING, | |
157 | FWNET_BROADCAST_STOPPED, | |
158 | } broadcast_state; | |
c76acec6 JF |
159 | struct fw_iso_context *broadcast_rcv_context; |
160 | struct fw_iso_buffer broadcast_rcv_buffer; | |
161 | void **broadcast_rcv_buffer_ptrs; | |
162 | unsigned broadcast_rcv_next_ptr; | |
163 | unsigned num_broadcast_rcv_ptrs; | |
164 | unsigned rcv_buffer_size; | |
165 | /* | |
166 | * This value is the maximum unfragmented datagram size that can be | |
167 | * sent by the hardware. It already has the GASP overhead and the | |
168 | * unfragmented datagram header overhead calculated into it. | |
169 | */ | |
170 | unsigned broadcast_xmt_max_payload; | |
171 | u16 broadcast_xmt_datagramlabel; | |
172 | ||
173 | /* | |
f91e3bd8 | 174 | * The CSR address that remote nodes must send datagrams to for us to |
c76acec6 JF |
175 | * receive them. |
176 | */ | |
177 | struct fw_address_handler handler; | |
178 | u64 local_fifo; | |
179 | ||
48553011 SR |
180 | /* Number of tx datagrams that have been queued but not yet acked */ |
181 | int queued_datagrams; | |
c76acec6 | 182 | |
c1671470 | 183 | int peer_count; |
5a124d38 | 184 | struct list_head peer_list; |
c76acec6 | 185 | struct fw_card *card; |
5a124d38 SR |
186 | struct net_device *netdev; |
187 | }; | |
188 | ||
189 | struct fwnet_peer { | |
190 | struct list_head peer_link; | |
191 | struct fwnet_device *dev; | |
192 | u64 guid; | |
193 | u64 fifo; | |
74a14504 | 194 | __be32 ip; |
5a124d38 SR |
195 | |
196 | /* guarded by dev->lock */ | |
197 | struct list_head pd_list; /* received partial datagrams */ | |
198 | unsigned pdg_size; /* pd_list size */ | |
199 | ||
200 | u16 datagram_label; /* outgoing datagram label */ | |
48553011 | 201 | u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ |
5a124d38 SR |
202 | int node_id; |
203 | int generation; | |
204 | unsigned speed; | |
c76acec6 JF |
205 | }; |
206 | ||
207 | /* This is our task struct. It's used for the packet complete callback. */ | |
f91e3bd8 | 208 | struct fwnet_packet_task { |
c76acec6 | 209 | struct fw_transaction transaction; |
f91e3bd8 | 210 | struct rfc2734_header hdr; |
c76acec6 | 211 | struct sk_buff *skb; |
f91e3bd8 SR |
212 | struct fwnet_device *dev; |
213 | ||
c76acec6 | 214 | int outstanding_pkts; |
c76acec6 JF |
215 | u64 fifo_addr; |
216 | u16 dest_node; | |
48553011 | 217 | u16 max_payload; |
c76acec6 JF |
218 | u8 generation; |
219 | u8 speed; | |
48553011 | 220 | u8 enqueued; |
c76acec6 JF |
221 | }; |
222 | ||
f91e3bd8 SR |
223 | /* |
224 | * saddr == NULL means use device source address. | |
225 | * daddr == NULL means leave destination address (eg unresolved arp). | |
226 | */ | |
227 | static int fwnet_header_create(struct sk_buff *skb, struct net_device *net, | |
228 | unsigned short type, const void *daddr, | |
229 | const void *saddr, unsigned len) | |
230 | { | |
231 | struct fwnet_header *h; | |
c76acec6 | 232 | |
f91e3bd8 SR |
233 | h = (struct fwnet_header *)skb_push(skb, sizeof(*h)); |
234 | put_unaligned_be16(type, &h->h_proto); | |
c76acec6 | 235 | |
f91e3bd8 SR |
236 | if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
237 | memset(h->h_dest, 0, net->addr_len); | |
c76acec6 | 238 | |
f91e3bd8 | 239 | return net->hard_header_len; |
c76acec6 JF |
240 | } |
241 | ||
242 | if (daddr) { | |
f91e3bd8 SR |
243 | memcpy(h->h_dest, daddr, net->addr_len); |
244 | ||
245 | return net->hard_header_len; | |
c76acec6 JF |
246 | } |
247 | ||
f91e3bd8 | 248 | return -net->hard_header_len; |
c76acec6 JF |
249 | } |
250 | ||
f91e3bd8 | 251 | static int fwnet_header_rebuild(struct sk_buff *skb) |
c76acec6 | 252 | { |
f91e3bd8 | 253 | struct fwnet_header *h = (struct fwnet_header *)skb->data; |
c76acec6 | 254 | |
f91e3bd8 SR |
255 | if (get_unaligned_be16(&h->h_proto) == ETH_P_IP) |
256 | return arp_find((unsigned char *)&h->h_dest, skb); | |
c76acec6 | 257 | |
f91e3bd8 SR |
258 | fw_notify("%s: unable to resolve type %04x addresses\n", |
259 | skb->dev->name, be16_to_cpu(h->h_proto)); | |
c76acec6 JF |
260 | return 0; |
261 | } | |
262 | ||
f91e3bd8 SR |
263 | static int fwnet_header_cache(const struct neighbour *neigh, |
264 | struct hh_cache *hh) | |
265 | { | |
266 | struct net_device *net; | |
267 | struct fwnet_header *h; | |
c76acec6 | 268 | |
f91e3bd8 | 269 | if (hh->hh_type == cpu_to_be16(ETH_P_802_3)) |
c76acec6 | 270 | return -1; |
f91e3bd8 SR |
271 | net = neigh->dev; |
272 | h = (struct fwnet_header *)((u8 *)hh->hh_data + 16 - sizeof(*h)); | |
273 | h->h_proto = hh->hh_type; | |
274 | memcpy(h->h_dest, neigh->ha, net->addr_len); | |
275 | hh->hh_len = FWNET_HLEN; | |
c76acec6 | 276 | |
c76acec6 JF |
277 | return 0; |
278 | } | |
279 | ||
280 | /* Called by Address Resolution module to notify changes in address. */ | |
f91e3bd8 SR |
281 | static void fwnet_header_cache_update(struct hh_cache *hh, |
282 | const struct net_device *net, const unsigned char *haddr) | |
283 | { | |
284 | memcpy((u8 *)hh->hh_data + 16 - FWNET_HLEN, haddr, net->addr_len); | |
c76acec6 JF |
285 | } |
286 | ||
f91e3bd8 SR |
287 | static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
288 | { | |
289 | memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN); | |
290 | ||
291 | return FWNET_ALEN; | |
c76acec6 JF |
292 | } |
293 | ||
f91e3bd8 SR |
294 | static const struct header_ops fwnet_header_ops = { |
295 | .create = fwnet_header_create, | |
296 | .rebuild = fwnet_header_rebuild, | |
297 | .cache = fwnet_header_cache, | |
298 | .cache_update = fwnet_header_cache_update, | |
299 | .parse = fwnet_header_parse, | |
c76acec6 JF |
300 | }; |
301 | ||
c76acec6 | 302 | /* FIXME: is this correct for all cases? */ |
f91e3bd8 SR |
303 | static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd, |
304 | unsigned offset, unsigned len) | |
c76acec6 | 305 | { |
f91e3bd8 | 306 | struct fwnet_fragment_info *fi; |
c76acec6 JF |
307 | unsigned end = offset + len; |
308 | ||
f91e3bd8 SR |
309 | list_for_each_entry(fi, &pd->fi_list, fi_link) |
310 | if (offset < fi->offset + fi->len && end > fi->offset) | |
c76acec6 | 311 | return true; |
f91e3bd8 | 312 | |
c76acec6 JF |
313 | return false; |
314 | } | |
315 | ||
316 | /* Assumes that new fragment does not overlap any existing fragments */ | |
f91e3bd8 SR |
317 | static struct fwnet_fragment_info *fwnet_frag_new( |
318 | struct fwnet_partial_datagram *pd, unsigned offset, unsigned len) | |
319 | { | |
320 | struct fwnet_fragment_info *fi, *fi2, *new; | |
c76acec6 JF |
321 | struct list_head *list; |
322 | ||
f91e3bd8 SR |
323 | list = &pd->fi_list; |
324 | list_for_each_entry(fi, &pd->fi_list, fi_link) { | |
c76acec6 JF |
325 | if (fi->offset + fi->len == offset) { |
326 | /* The new fragment can be tacked on to the end */ | |
327 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
328 | fi2 = list_entry(fi->fi_link.next, |
329 | struct fwnet_fragment_info, fi_link); | |
c76acec6 | 330 | if (fi->offset + fi->len == fi2->offset) { |
c76acec6 JF |
331 | /* glue fragments together */ |
332 | fi->len += len + fi2->len; | |
f91e3bd8 | 333 | list_del(&fi2->fi_link); |
c76acec6 JF |
334 | kfree(fi2); |
335 | } else { | |
c76acec6 JF |
336 | fi->len += len; |
337 | } | |
f91e3bd8 | 338 | |
c76acec6 JF |
339 | return fi; |
340 | } | |
341 | if (offset + len == fi->offset) { | |
342 | /* The new fragment can be tacked on to the beginning */ | |
343 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
344 | fi2 = list_entry(fi->fi_link.prev, |
345 | struct fwnet_fragment_info, fi_link); | |
c76acec6 JF |
346 | if (fi2->offset + fi2->len == fi->offset) { |
347 | /* glue fragments together */ | |
c76acec6 | 348 | fi2->len += fi->len + len; |
f91e3bd8 | 349 | list_del(&fi->fi_link); |
c76acec6 | 350 | kfree(fi); |
f91e3bd8 | 351 | |
c76acec6 JF |
352 | return fi2; |
353 | } | |
c76acec6 JF |
354 | fi->offset = offset; |
355 | fi->len += len; | |
f91e3bd8 | 356 | |
c76acec6 JF |
357 | return fi; |
358 | } | |
359 | if (offset > fi->offset + fi->len) { | |
f91e3bd8 | 360 | list = &fi->fi_link; |
c76acec6 JF |
361 | break; |
362 | } | |
363 | if (offset + len < fi->offset) { | |
f91e3bd8 | 364 | list = fi->fi_link.prev; |
c76acec6 JF |
365 | break; |
366 | } | |
367 | } | |
368 | ||
369 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
370 | if (!new) { | |
f91e3bd8 | 371 | fw_error("out of memory\n"); |
c76acec6 JF |
372 | return NULL; |
373 | } | |
374 | ||
375 | new->offset = offset; | |
376 | new->len = len; | |
f91e3bd8 SR |
377 | list_add(&new->fi_link, list); |
378 | ||
c76acec6 JF |
379 | return new; |
380 | } | |
381 | ||
f91e3bd8 SR |
382 | static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net, |
383 | struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size, | |
384 | void *frag_buf, unsigned frag_off, unsigned frag_len) | |
385 | { | |
386 | struct fwnet_partial_datagram *new; | |
387 | struct fwnet_fragment_info *fi; | |
c76acec6 JF |
388 | |
389 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
390 | if (!new) | |
391 | goto fail; | |
f91e3bd8 SR |
392 | |
393 | INIT_LIST_HEAD(&new->fi_list); | |
394 | fi = fwnet_frag_new(new, frag_off, frag_len); | |
395 | if (fi == NULL) | |
c76acec6 | 396 | goto fail_w_new; |
f91e3bd8 | 397 | |
c76acec6 JF |
398 | new->datagram_label = datagram_label; |
399 | new->datagram_size = dg_size; | |
f91e3bd8 SR |
400 | new->skb = dev_alloc_skb(dg_size + net->hard_header_len + 15); |
401 | if (new->skb == NULL) | |
c76acec6 | 402 | goto fail_w_fi; |
f91e3bd8 SR |
403 | |
404 | skb_reserve(new->skb, (net->hard_header_len + 15) & ~15); | |
c76acec6 JF |
405 | new->pbuf = skb_put(new->skb, dg_size); |
406 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
f91e3bd8 SR |
407 | list_add_tail(&new->pd_link, &peer->pd_list); |
408 | ||
c76acec6 JF |
409 | return new; |
410 | ||
411 | fail_w_fi: | |
412 | kfree(fi); | |
413 | fail_w_new: | |
414 | kfree(new); | |
415 | fail: | |
f91e3bd8 SR |
416 | fw_error("out of memory\n"); |
417 | ||
c76acec6 JF |
418 | return NULL; |
419 | } | |
420 | ||
f91e3bd8 SR |
421 | static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer, |
422 | u16 datagram_label) | |
423 | { | |
424 | struct fwnet_partial_datagram *pd; | |
c76acec6 | 425 | |
f91e3bd8 SR |
426 | list_for_each_entry(pd, &peer->pd_list, pd_link) |
427 | if (pd->datagram_label == datagram_label) | |
c76acec6 | 428 | return pd; |
f91e3bd8 | 429 | |
c76acec6 JF |
430 | return NULL; |
431 | } | |
432 | ||
433 | ||
f91e3bd8 SR |
434 | static void fwnet_pd_delete(struct fwnet_partial_datagram *old) |
435 | { | |
436 | struct fwnet_fragment_info *fi, *n; | |
c76acec6 | 437 | |
f91e3bd8 | 438 | list_for_each_entry_safe(fi, n, &old->fi_list, fi_link) |
c76acec6 | 439 | kfree(fi); |
f91e3bd8 SR |
440 | |
441 | list_del(&old->pd_link); | |
c76acec6 JF |
442 | dev_kfree_skb_any(old->skb); |
443 | kfree(old); | |
444 | } | |
445 | ||
f91e3bd8 SR |
446 | static bool fwnet_pd_update(struct fwnet_peer *peer, |
447 | struct fwnet_partial_datagram *pd, void *frag_buf, | |
448 | unsigned frag_off, unsigned frag_len) | |
449 | { | |
450 | if (fwnet_frag_new(pd, frag_off, frag_len) == NULL) | |
c76acec6 | 451 | return false; |
f91e3bd8 | 452 | |
c76acec6 JF |
453 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
454 | ||
455 | /* | |
456 | * Move list entry to beginnig of list so that oldest partial | |
457 | * datagrams percolate to the end of the list | |
458 | */ | |
f91e3bd8 SR |
459 | list_move_tail(&pd->pd_link, &peer->pd_list); |
460 | ||
c76acec6 JF |
461 | return true; |
462 | } | |
463 | ||
f91e3bd8 SR |
464 | static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd) |
465 | { | |
466 | struct fwnet_fragment_info *fi; | |
c76acec6 | 467 | |
f91e3bd8 | 468 | fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link); |
c76acec6 | 469 | |
f91e3bd8 | 470 | return fi->len == pd->datagram_size; |
c76acec6 JF |
471 | } |
472 | ||
5a124d38 | 473 | /* caller must hold dev->lock */ |
f91e3bd8 SR |
474 | static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev, |
475 | u64 guid) | |
476 | { | |
5a124d38 | 477 | struct fwnet_peer *peer; |
c76acec6 | 478 | |
5a124d38 SR |
479 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
480 | if (peer->guid == guid) | |
481 | return peer; | |
c76acec6 | 482 | |
5a124d38 | 483 | return NULL; |
c76acec6 JF |
484 | } |
485 | ||
5a124d38 | 486 | /* caller must hold dev->lock */ |
f91e3bd8 | 487 | static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev, |
5a124d38 | 488 | int node_id, int generation) |
f91e3bd8 | 489 | { |
5a124d38 | 490 | struct fwnet_peer *peer; |
c76acec6 | 491 | |
5a124d38 SR |
492 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
493 | if (peer->node_id == node_id && | |
494 | peer->generation == generation) | |
495 | return peer; | |
f91e3bd8 | 496 | |
5a124d38 | 497 | return NULL; |
c76acec6 JF |
498 | } |
499 | ||
5a124d38 SR |
500 | /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */ |
501 | static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed) | |
f91e3bd8 | 502 | { |
5a124d38 SR |
503 | max_rec = min(max_rec, speed + 8); |
504 | max_rec = min(max_rec, 0xbU); /* <= 4096 */ | |
505 | if (max_rec < 8) { | |
506 | fw_notify("max_rec %x out of range\n", max_rec); | |
507 | max_rec = 8; | |
c76acec6 | 508 | } |
5a124d38 SR |
509 | |
510 | return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; | |
c76acec6 JF |
511 | } |
512 | ||
5a124d38 | 513 | |
f91e3bd8 SR |
514 | static int fwnet_finish_incoming_packet(struct net_device *net, |
515 | struct sk_buff *skb, u16 source_node_id, | |
516 | bool is_broadcast, u16 ether_type) | |
517 | { | |
518 | struct fwnet_device *dev; | |
519 | static const __be64 broadcast_hw = cpu_to_be64(~0ULL); | |
c76acec6 | 520 | int status; |
f91e3bd8 | 521 | __be64 guid; |
c76acec6 | 522 | |
f91e3bd8 | 523 | dev = netdev_priv(net); |
c76acec6 | 524 | /* Write metadata, and then pass to the receive level */ |
f91e3bd8 | 525 | skb->dev = net; |
c76acec6 JF |
526 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ |
527 | ||
528 | /* | |
529 | * Parse the encapsulation header. This actually does the job of | |
530 | * converting to an ethernet frame header, as well as arp | |
531 | * conversion if needed. ARP conversion is easier in this | |
532 | * direction, since we are using ethernet as our backend. | |
533 | */ | |
534 | /* | |
535 | * If this is an ARP packet, convert it. First, we want to make | |
536 | * use of some of the fields, since they tell us a little bit | |
537 | * about the sending machine. | |
538 | */ | |
539 | if (ether_type == ETH_P_ARP) { | |
f91e3bd8 | 540 | struct rfc2734_arp *arp1394; |
c76acec6 JF |
541 | struct arphdr *arp; |
542 | unsigned char *arp_ptr; | |
543 | u64 fifo_addr; | |
f91e3bd8 | 544 | u64 peer_guid; |
5a124d38 | 545 | unsigned sspd; |
c76acec6 | 546 | u16 max_payload; |
f91e3bd8 | 547 | struct fwnet_peer *peer; |
5a124d38 SR |
548 | unsigned long flags; |
549 | ||
550 | arp1394 = (struct rfc2734_arp *)skb->data; | |
551 | arp = (struct arphdr *)skb->data; | |
552 | arp_ptr = (unsigned char *)(arp + 1); | |
553 | peer_guid = get_unaligned_be64(&arp1394->s_uniq_id); | |
554 | fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32 | |
555 | | get_unaligned_be32(&arp1394->fifo_lo); | |
c76acec6 | 556 | |
c76acec6 | 557 | sspd = arp1394->sspd; |
f91e3bd8 SR |
558 | /* Sanity check. OS X 10.3 PPC reportedly sends 131. */ |
559 | if (sspd > SCODE_3200) { | |
560 | fw_notify("sspd %x out of range\n", sspd); | |
5a124d38 | 561 | sspd = SCODE_3200; |
c76acec6 | 562 | } |
5a124d38 | 563 | max_payload = fwnet_max_payload(arp1394->max_rec, sspd); |
c76acec6 | 564 | |
5a124d38 | 565 | spin_lock_irqsave(&dev->lock, flags); |
f91e3bd8 | 566 | peer = fwnet_peer_find_by_guid(dev, peer_guid); |
5a124d38 SR |
567 | if (peer) { |
568 | peer->fifo = fifo_addr; | |
569 | ||
570 | if (peer->speed > sspd) | |
571 | peer->speed = sspd; | |
572 | if (peer->max_payload > max_payload) | |
573 | peer->max_payload = max_payload; | |
74a14504 ML |
574 | |
575 | peer->ip = arp1394->sip; | |
5a124d38 SR |
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 | 654 | |
c76acec6 JF |
655 | return 0; |
656 | ||
1bf145fe | 657 | no_peer: |
f91e3bd8 SR |
658 | net->stats.rx_errors++; |
659 | net->stats.rx_dropped++; | |
660 | ||
c76acec6 | 661 | dev_kfree_skb_any(skb); |
f91e3bd8 | 662 | |
1bf145fe | 663 | return -ENOENT; |
c76acec6 JF |
664 | } |
665 | ||
f91e3bd8 | 666 | static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, |
5a124d38 SR |
667 | int source_node_id, int generation, |
668 | bool is_broadcast) | |
f91e3bd8 | 669 | { |
c76acec6 | 670 | struct sk_buff *skb; |
5a124d38 | 671 | struct net_device *net = dev->netdev; |
f91e3bd8 | 672 | struct rfc2734_header hdr; |
c76acec6 JF |
673 | unsigned lf; |
674 | unsigned long flags; | |
f91e3bd8 SR |
675 | struct fwnet_peer *peer; |
676 | struct fwnet_partial_datagram *pd; | |
c76acec6 JF |
677 | int fg_off; |
678 | int dg_size; | |
679 | u16 datagram_label; | |
680 | int retval; | |
681 | u16 ether_type; | |
682 | ||
f91e3bd8 SR |
683 | hdr.w0 = be32_to_cpu(buf[0]); |
684 | lf = fwnet_get_hdr_lf(&hdr); | |
685 | if (lf == RFC2374_HDR_UNFRAG) { | |
c76acec6 JF |
686 | /* |
687 | * An unfragmented datagram has been received by the ieee1394 | |
688 | * bus. Build an skbuff around it so we can pass it to the | |
689 | * high level network layer. | |
690 | */ | |
f91e3bd8 | 691 | ether_type = fwnet_get_hdr_ether_type(&hdr); |
c76acec6 | 692 | buf++; |
f91e3bd8 | 693 | len -= RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 | 694 | |
f91e3bd8 | 695 | skb = dev_alloc_skb(len + net->hard_header_len + 15); |
c76acec6 | 696 | if (unlikely(!skb)) { |
f91e3bd8 SR |
697 | fw_error("out of memory\n"); |
698 | net->stats.rx_dropped++; | |
699 | ||
1bf145fe | 700 | return -ENOMEM; |
c76acec6 | 701 | } |
f91e3bd8 SR |
702 | skb_reserve(skb, (net->hard_header_len + 15) & ~15); |
703 | memcpy(skb_put(skb, len), buf, len); | |
704 | ||
705 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
706 | is_broadcast, ether_type); | |
c76acec6 JF |
707 | } |
708 | /* A datagram fragment has been received, now the fun begins. */ | |
709 | hdr.w1 = ntohl(buf[1]); | |
f91e3bd8 SR |
710 | buf += 2; |
711 | len -= RFC2374_FRAG_HDR_SIZE; | |
712 | if (lf == RFC2374_HDR_FIRSTFRAG) { | |
713 | ether_type = fwnet_get_hdr_ether_type(&hdr); | |
c76acec6 JF |
714 | fg_off = 0; |
715 | } else { | |
f91e3bd8 SR |
716 | ether_type = 0; |
717 | fg_off = fwnet_get_hdr_fg_off(&hdr); | |
c76acec6 | 718 | } |
f91e3bd8 SR |
719 | datagram_label = fwnet_get_hdr_dgl(&hdr); |
720 | dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */ | |
f91e3bd8 | 721 | |
5a124d38 SR |
722 | spin_lock_irqsave(&dev->lock, flags); |
723 | ||
724 | peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); | |
1bf145fe SR |
725 | if (!peer) { |
726 | retval = -ENOENT; | |
727 | goto fail; | |
728 | } | |
f91e3bd8 SR |
729 | |
730 | pd = fwnet_pd_find(peer, datagram_label); | |
c76acec6 | 731 | if (pd == NULL) { |
f91e3bd8 | 732 | while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { |
c76acec6 | 733 | /* remove the oldest */ |
f91e3bd8 SR |
734 | fwnet_pd_delete(list_first_entry(&peer->pd_list, |
735 | struct fwnet_partial_datagram, pd_link)); | |
736 | peer->pdg_size--; | |
c76acec6 | 737 | } |
f91e3bd8 SR |
738 | pd = fwnet_pd_new(net, peer, datagram_label, |
739 | dg_size, buf, fg_off, len); | |
740 | if (pd == NULL) { | |
c76acec6 | 741 | retval = -ENOMEM; |
1bf145fe | 742 | goto fail; |
c76acec6 | 743 | } |
f91e3bd8 | 744 | peer->pdg_size++; |
c76acec6 | 745 | } else { |
f91e3bd8 SR |
746 | if (fwnet_frag_overlap(pd, fg_off, len) || |
747 | pd->datagram_size != dg_size) { | |
c76acec6 JF |
748 | /* |
749 | * Differing datagram sizes or overlapping fragments, | |
f91e3bd8 | 750 | * discard old datagram and start a new one. |
c76acec6 | 751 | */ |
f91e3bd8 SR |
752 | fwnet_pd_delete(pd); |
753 | pd = fwnet_pd_new(net, peer, datagram_label, | |
754 | dg_size, buf, fg_off, len); | |
755 | if (pd == NULL) { | |
f91e3bd8 | 756 | peer->pdg_size--; |
1bf145fe SR |
757 | retval = -ENOMEM; |
758 | goto fail; | |
c76acec6 JF |
759 | } |
760 | } else { | |
f91e3bd8 | 761 | if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { |
c76acec6 JF |
762 | /* |
763 | * Couldn't save off fragment anyway | |
764 | * so might as well obliterate the | |
765 | * datagram now. | |
766 | */ | |
f91e3bd8 SR |
767 | fwnet_pd_delete(pd); |
768 | peer->pdg_size--; | |
1bf145fe SR |
769 | retval = -ENOMEM; |
770 | goto fail; | |
c76acec6 JF |
771 | } |
772 | } | |
773 | } /* new datagram or add to existing one */ | |
774 | ||
f91e3bd8 | 775 | if (lf == RFC2374_HDR_FIRSTFRAG) |
c76acec6 | 776 | pd->ether_type = ether_type; |
f91e3bd8 SR |
777 | |
778 | if (fwnet_pd_is_complete(pd)) { | |
c76acec6 | 779 | ether_type = pd->ether_type; |
f91e3bd8 | 780 | peer->pdg_size--; |
c76acec6 | 781 | skb = skb_get(pd->skb); |
f91e3bd8 SR |
782 | fwnet_pd_delete(pd); |
783 | ||
5a124d38 | 784 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
785 | |
786 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
787 | false, ether_type); | |
c76acec6 JF |
788 | } |
789 | /* | |
790 | * Datagram is not complete, we're done for the | |
791 | * moment. | |
792 | */ | |
b2268830 | 793 | retval = 0; |
1bf145fe | 794 | fail: |
5a124d38 | 795 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 | 796 | |
1bf145fe | 797 | return retval; |
c76acec6 JF |
798 | } |
799 | ||
f91e3bd8 SR |
800 | static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |
801 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
802 | unsigned long long offset, void *payload, size_t length, |
803 | void *callback_data) | |
f91e3bd8 | 804 | { |
00635b8e SR |
805 | struct fwnet_device *dev = callback_data; |
806 | int rcode; | |
c76acec6 | 807 | |
00635b8e SR |
808 | if (destination == IEEE1394_ALL_NODES) { |
809 | kfree(r); | |
f91e3bd8 | 810 | |
c76acec6 JF |
811 | return; |
812 | } | |
f91e3bd8 | 813 | |
00635b8e SR |
814 | if (offset != dev->handler.offset) |
815 | rcode = RCODE_ADDRESS_ERROR; | |
816 | else if (tcode != TCODE_WRITE_BLOCK_REQUEST) | |
817 | rcode = RCODE_TYPE_ERROR; | |
818 | else if (fwnet_incoming_packet(dev, payload, length, | |
819 | source, generation, false) != 0) { | |
f91e3bd8 | 820 | fw_error("Incoming packet failure\n"); |
00635b8e SR |
821 | rcode = RCODE_CONFLICT_ERROR; |
822 | } else | |
823 | rcode = RCODE_COMPLETE; | |
f91e3bd8 | 824 | |
00635b8e | 825 | fw_send_response(card, r, rcode); |
c76acec6 JF |
826 | } |
827 | ||
f91e3bd8 SR |
828 | static void fwnet_receive_broadcast(struct fw_iso_context *context, |
829 | u32 cycle, size_t header_length, void *header, void *data) | |
830 | { | |
831 | struct fwnet_device *dev; | |
c76acec6 JF |
832 | struct fw_iso_packet packet; |
833 | struct fw_card *card; | |
f91e3bd8 SR |
834 | __be16 *hdr_ptr; |
835 | __be32 *buf_ptr; | |
c76acec6 JF |
836 | int retval; |
837 | u32 length; | |
838 | u16 source_node_id; | |
839 | u32 specifier_id; | |
840 | u32 ver; | |
841 | unsigned long offset; | |
842 | unsigned long flags; | |
843 | ||
f91e3bd8 SR |
844 | dev = data; |
845 | card = dev->card; | |
c76acec6 | 846 | hdr_ptr = header; |
f91e3bd8 SR |
847 | length = be16_to_cpup(hdr_ptr); |
848 | ||
849 | spin_lock_irqsave(&dev->lock, flags); | |
850 | ||
851 | offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; | |
852 | buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; | |
853 | if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) | |
854 | dev->broadcast_rcv_next_ptr = 0; | |
855 | ||
856 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
857 | |
858 | specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 | |
859 | | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; | |
f91e3bd8 | 860 | ver = be32_to_cpu(buf_ptr[1]) & 0xffffff; |
c76acec6 | 861 | source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; |
f91e3bd8 SR |
862 | |
863 | if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) { | |
c76acec6 | 864 | buf_ptr += 2; |
f91e3bd8 SR |
865 | length -= IEEE1394_GASP_HDR_SIZE; |
866 | fwnet_incoming_packet(dev, buf_ptr, length, | |
5a124d38 | 867 | source_node_id, -1, true); |
f91e3bd8 SR |
868 | } |
869 | ||
870 | packet.payload_length = dev->rcv_buffer_size; | |
c76acec6 JF |
871 | packet.interrupt = 1; |
872 | packet.skip = 0; | |
873 | packet.tag = 3; | |
874 | packet.sy = 0; | |
f91e3bd8 SR |
875 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
876 | ||
877 | spin_lock_irqsave(&dev->lock, flags); | |
c76acec6 | 878 | |
f91e3bd8 SR |
879 | retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, |
880 | &dev->broadcast_rcv_buffer, offset); | |
881 | ||
882 | spin_unlock_irqrestore(&dev->lock, flags); | |
883 | ||
884 | if (retval < 0) | |
885 | fw_error("requeue failed\n"); | |
c76acec6 JF |
886 | } |
887 | ||
f91e3bd8 SR |
888 | static struct kmem_cache *fwnet_packet_task_cache; |
889 | ||
110f82d7 SR |
890 | static void fwnet_free_ptask(struct fwnet_packet_task *ptask) |
891 | { | |
892 | dev_kfree_skb_any(ptask->skb); | |
893 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
894 | } | |
895 | ||
b2268830 SR |
896 | /* Caller must hold dev->lock. */ |
897 | static void dec_queued_datagrams(struct fwnet_device *dev) | |
898 | { | |
899 | if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS) | |
900 | netif_wake_queue(dev->netdev); | |
901 | } | |
902 | ||
f91e3bd8 SR |
903 | static int fwnet_send_packet(struct fwnet_packet_task *ptask); |
904 | ||
905 | static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) | |
906 | { | |
110f82d7 | 907 | struct fwnet_device *dev = ptask->dev; |
902bca00 | 908 | struct sk_buff *skb = ptask->skb; |
c76acec6 | 909 | unsigned long flags; |
110f82d7 | 910 | bool free; |
f91e3bd8 SR |
911 | |
912 | spin_lock_irqsave(&dev->lock, flags); | |
f91e3bd8 | 913 | |
110f82d7 SR |
914 | ptask->outstanding_pkts--; |
915 | ||
916 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 917 | free = (ptask->outstanding_pkts == 0 && ptask->enqueued); |
7ee11fa8 | 918 | if (free) |
b2268830 | 919 | dec_queued_datagrams(dev); |
110f82d7 | 920 | |
902bca00 | 921 | if (ptask->outstanding_pkts == 0) { |
902bca00 SR |
922 | dev->netdev->stats.tx_packets++; |
923 | dev->netdev->stats.tx_bytes += skb->len; | |
924 | } | |
110f82d7 SR |
925 | |
926 | spin_unlock_irqrestore(&dev->lock, flags); | |
f91e3bd8 SR |
927 | |
928 | if (ptask->outstanding_pkts > 0) { | |
c76acec6 JF |
929 | u16 dg_size; |
930 | u16 fg_off; | |
931 | u16 datagram_label; | |
932 | u16 lf; | |
c76acec6 JF |
933 | |
934 | /* Update the ptask to point to the next fragment and send it */ | |
f91e3bd8 | 935 | lf = fwnet_get_hdr_lf(&ptask->hdr); |
c76acec6 | 936 | switch (lf) { |
f91e3bd8 SR |
937 | case RFC2374_HDR_LASTFRAG: |
938 | case RFC2374_HDR_UNFRAG: | |
c76acec6 | 939 | default: |
f91e3bd8 SR |
940 | fw_error("Outstanding packet %x lf %x, header %x,%x\n", |
941 | ptask->outstanding_pkts, lf, ptask->hdr.w0, | |
942 | ptask->hdr.w1); | |
c76acec6 JF |
943 | BUG(); |
944 | ||
f91e3bd8 | 945 | case RFC2374_HDR_FIRSTFRAG: |
c76acec6 | 946 | /* Set frag type here for future interior fragments */ |
f91e3bd8 SR |
947 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); |
948 | fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
949 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
950 | break; |
951 | ||
f91e3bd8 SR |
952 | case RFC2374_HDR_INTFRAG: |
953 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); | |
954 | fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) | |
955 | + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
956 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
957 | break; |
958 | } | |
902bca00 | 959 | |
f91e3bd8 SR |
960 | skb_pull(skb, ptask->max_payload); |
961 | if (ptask->outstanding_pkts > 1) { | |
962 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, | |
963 | dg_size, fg_off, datagram_label); | |
c76acec6 | 964 | } else { |
f91e3bd8 SR |
965 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, |
966 | dg_size, fg_off, datagram_label); | |
967 | ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; | |
c76acec6 | 968 | } |
f91e3bd8 | 969 | fwnet_send_packet(ptask); |
c76acec6 | 970 | } |
110f82d7 SR |
971 | |
972 | if (free) | |
973 | fwnet_free_ptask(ptask); | |
c76acec6 JF |
974 | } |
975 | ||
7ee11fa8 SR |
976 | static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask) |
977 | { | |
978 | struct fwnet_device *dev = ptask->dev; | |
979 | unsigned long flags; | |
980 | bool free; | |
981 | ||
982 | spin_lock_irqsave(&dev->lock, flags); | |
983 | ||
984 | /* One fragment failed; don't try to send remaining fragments. */ | |
985 | ptask->outstanding_pkts = 0; | |
986 | ||
987 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 988 | free = ptask->enqueued; |
7ee11fa8 | 989 | if (free) |
b2268830 | 990 | dec_queued_datagrams(dev); |
7ee11fa8 SR |
991 | |
992 | dev->netdev->stats.tx_dropped++; | |
993 | dev->netdev->stats.tx_errors++; | |
994 | ||
995 | spin_unlock_irqrestore(&dev->lock, flags); | |
996 | ||
997 | if (free) | |
998 | fwnet_free_ptask(ptask); | |
999 | } | |
1000 | ||
f91e3bd8 SR |
1001 | static void fwnet_write_complete(struct fw_card *card, int rcode, |
1002 | void *payload, size_t length, void *data) | |
1003 | { | |
c4d6fd40 ML |
1004 | struct fwnet_packet_task *ptask = data; |
1005 | static unsigned long j; | |
1006 | static int last_rcode, errors_skipped; | |
c76acec6 | 1007 | |
7ee11fa8 | 1008 | if (rcode == RCODE_COMPLETE) { |
f91e3bd8 | 1009 | fwnet_transmit_packet_done(ptask); |
7ee11fa8 | 1010 | } else { |
7ee11fa8 | 1011 | fwnet_transmit_packet_failed(ptask); |
c4d6fd40 ML |
1012 | |
1013 | if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) { | |
1014 | fw_error("fwnet_write_complete: " | |
1015 | "failed: %x (skipped %d)\n", rcode, errors_skipped); | |
1016 | ||
1017 | errors_skipped = 0; | |
1018 | last_rcode = rcode; | |
1019 | } else | |
1020 | errors_skipped++; | |
7ee11fa8 | 1021 | } |
c76acec6 JF |
1022 | } |
1023 | ||
f91e3bd8 SR |
1024 | static int fwnet_send_packet(struct fwnet_packet_task *ptask) |
1025 | { | |
1026 | struct fwnet_device *dev; | |
c76acec6 | 1027 | unsigned tx_len; |
f91e3bd8 | 1028 | struct rfc2734_header *bufhdr; |
c76acec6 | 1029 | unsigned long flags; |
110f82d7 | 1030 | bool free; |
c76acec6 | 1031 | |
f91e3bd8 | 1032 | dev = ptask->dev; |
c76acec6 | 1033 | tx_len = ptask->max_payload; |
f91e3bd8 SR |
1034 | switch (fwnet_get_hdr_lf(&ptask->hdr)) { |
1035 | case RFC2374_HDR_UNFRAG: | |
1036 | bufhdr = (struct rfc2734_header *) | |
1037 | skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); | |
1038 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
c76acec6 JF |
1039 | break; |
1040 | ||
f91e3bd8 SR |
1041 | case RFC2374_HDR_FIRSTFRAG: |
1042 | case RFC2374_HDR_INTFRAG: | |
1043 | case RFC2374_HDR_LASTFRAG: | |
1044 | bufhdr = (struct rfc2734_header *) | |
1045 | skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); | |
1046 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
1047 | put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); | |
c76acec6 JF |
1048 | break; |
1049 | ||
1050 | default: | |
1051 | BUG(); | |
1052 | } | |
f91e3bd8 SR |
1053 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
1054 | u8 *p; | |
c76acec6 | 1055 | int generation; |
f91e3bd8 | 1056 | int node_id; |
c76acec6 JF |
1057 | |
1058 | /* ptask->generation may not have been set yet */ | |
f91e3bd8 | 1059 | generation = dev->card->generation; |
c76acec6 | 1060 | smp_rmb(); |
f91e3bd8 SR |
1061 | node_id = dev->card->node_id; |
1062 | ||
1063 | p = skb_push(ptask->skb, 8); | |
1064 | put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); | |
1065 | put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 | |
1066 | | RFC2734_SW_VERSION, &p[4]); | |
1067 | ||
1068 | /* We should not transmit if broadcast_channel.valid == 0. */ | |
1069 | fw_send_request(dev->card, &ptask->transaction, | |
1070 | TCODE_STREAM_DATA, | |
1071 | fw_stream_packet_destination_id(3, | |
1072 | IEEE1394_BROADCAST_CHANNEL, 0), | |
1073 | generation, SCODE_100, 0ULL, ptask->skb->data, | |
1074 | tx_len + 8, fwnet_write_complete, ptask); | |
1075 | ||
f91e3bd8 | 1076 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1077 | |
1078 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1079 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1080 | if (!free) |
48553011 SR |
1081 | ptask->enqueued = true; |
1082 | else | |
b2268830 | 1083 | dec_queued_datagrams(dev); |
110f82d7 | 1084 | |
f91e3bd8 SR |
1085 | spin_unlock_irqrestore(&dev->lock, flags); |
1086 | ||
110f82d7 | 1087 | goto out; |
c76acec6 | 1088 | } |
f91e3bd8 SR |
1089 | |
1090 | fw_send_request(dev->card, &ptask->transaction, | |
1091 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, | |
1092 | ptask->generation, ptask->speed, ptask->fifo_addr, | |
1093 | ptask->skb->data, tx_len, fwnet_write_complete, ptask); | |
1094 | ||
f91e3bd8 | 1095 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1096 | |
1097 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1098 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1099 | if (!free) |
48553011 SR |
1100 | ptask->enqueued = true; |
1101 | else | |
b2268830 | 1102 | dec_queued_datagrams(dev); |
110f82d7 | 1103 | |
f91e3bd8 SR |
1104 | spin_unlock_irqrestore(&dev->lock, flags); |
1105 | ||
5a124d38 | 1106 | dev->netdev->trans_start = jiffies; |
110f82d7 SR |
1107 | out: |
1108 | if (free) | |
1109 | fwnet_free_ptask(ptask); | |
f91e3bd8 | 1110 | |
c76acec6 JF |
1111 | return 0; |
1112 | } | |
1113 | ||
f91e3bd8 SR |
1114 | static int fwnet_broadcast_start(struct fwnet_device *dev) |
1115 | { | |
c76acec6 JF |
1116 | struct fw_iso_context *context; |
1117 | int retval; | |
1118 | unsigned num_packets; | |
1119 | unsigned max_receive; | |
1120 | struct fw_iso_packet packet; | |
1121 | unsigned long offset; | |
1122 | unsigned u; | |
c76acec6 | 1123 | |
f91e3bd8 SR |
1124 | if (dev->local_fifo == FWNET_NO_FIFO_ADDR) { |
1125 | /* outside OHCI posted write area? */ | |
1126 | static const struct fw_address_region region = { | |
1127 | .start = 0xffff00000000ULL, | |
1128 | .end = CSR_REGISTER_BASE, | |
1129 | }; | |
1130 | ||
1131 | dev->handler.length = 4096; | |
1132 | dev->handler.address_callback = fwnet_receive_packet; | |
1133 | dev->handler.callback_data = dev; | |
1134 | ||
1135 | retval = fw_core_add_address_handler(&dev->handler, ®ion); | |
1136 | if (retval < 0) | |
c76acec6 | 1137 | goto failed_initial; |
f91e3bd8 SR |
1138 | |
1139 | dev->local_fifo = dev->handler.offset; | |
c76acec6 JF |
1140 | } |
1141 | ||
f91e3bd8 SR |
1142 | max_receive = 1U << (dev->card->max_receive + 1); |
1143 | num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; | |
1144 | ||
1145 | if (!dev->broadcast_rcv_context) { | |
c76acec6 JF |
1146 | void **ptrptr; |
1147 | ||
f91e3bd8 SR |
1148 | context = fw_iso_context_create(dev->card, |
1149 | FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL, | |
1150 | dev->card->link_speed, 8, fwnet_receive_broadcast, dev); | |
c76acec6 JF |
1151 | if (IS_ERR(context)) { |
1152 | retval = PTR_ERR(context); | |
1153 | goto failed_context_create; | |
1154 | } | |
f91e3bd8 SR |
1155 | |
1156 | retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, | |
1157 | dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); | |
1158 | if (retval < 0) | |
c76acec6 | 1159 | goto failed_buffer_init; |
f91e3bd8 SR |
1160 | |
1161 | ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL); | |
1162 | if (!ptrptr) { | |
c76acec6 JF |
1163 | retval = -ENOMEM; |
1164 | goto failed_ptrs_alloc; | |
1165 | } | |
f91e3bd8 SR |
1166 | |
1167 | dev->broadcast_rcv_buffer_ptrs = ptrptr; | |
1168 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { | |
c76acec6 JF |
1169 | void *ptr; |
1170 | unsigned v; | |
1171 | ||
f91e3bd8 SR |
1172 | ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); |
1173 | for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) | |
1174 | *ptrptr++ = (void *) | |
1175 | ((char *)ptr + v * max_receive); | |
c76acec6 | 1176 | } |
f91e3bd8 SR |
1177 | dev->broadcast_rcv_context = context; |
1178 | } else { | |
1179 | context = dev->broadcast_rcv_context; | |
1180 | } | |
c76acec6 JF |
1181 | |
1182 | packet.payload_length = max_receive; | |
1183 | packet.interrupt = 1; | |
1184 | packet.skip = 0; | |
1185 | packet.tag = 3; | |
1186 | packet.sy = 0; | |
f91e3bd8 | 1187 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
c76acec6 | 1188 | offset = 0; |
f91e3bd8 SR |
1189 | |
1190 | for (u = 0; u < num_packets; u++) { | |
1191 | retval = fw_iso_context_queue(context, &packet, | |
1192 | &dev->broadcast_rcv_buffer, offset); | |
1193 | if (retval < 0) | |
c76acec6 | 1194 | goto failed_rcv_queue; |
f91e3bd8 | 1195 | |
c76acec6 JF |
1196 | offset += max_receive; |
1197 | } | |
f91e3bd8 SR |
1198 | dev->num_broadcast_rcv_ptrs = num_packets; |
1199 | dev->rcv_buffer_size = max_receive; | |
1200 | dev->broadcast_rcv_next_ptr = 0U; | |
1201 | retval = fw_iso_context_start(context, -1, 0, | |
1202 | FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ | |
1203 | if (retval < 0) | |
c76acec6 | 1204 | goto failed_rcv_queue; |
f91e3bd8 SR |
1205 | |
1206 | /* FIXME: adjust it according to the min. speed of all known peers? */ | |
1207 | dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 | |
1208 | - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; | |
1209 | dev->broadcast_state = FWNET_BROADCAST_RUNNING; | |
1210 | ||
c76acec6 JF |
1211 | return 0; |
1212 | ||
1213 | failed_rcv_queue: | |
f91e3bd8 SR |
1214 | kfree(dev->broadcast_rcv_buffer_ptrs); |
1215 | dev->broadcast_rcv_buffer_ptrs = NULL; | |
c76acec6 | 1216 | failed_ptrs_alloc: |
f91e3bd8 | 1217 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); |
c76acec6 | 1218 | failed_buffer_init: |
f91e3bd8 SR |
1219 | fw_iso_context_destroy(context); |
1220 | dev->broadcast_rcv_context = NULL; | |
c76acec6 | 1221 | failed_context_create: |
f91e3bd8 | 1222 | fw_core_remove_address_handler(&dev->handler); |
c76acec6 | 1223 | failed_initial: |
f91e3bd8 SR |
1224 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
1225 | ||
c76acec6 JF |
1226 | return retval; |
1227 | } | |
1228 | ||
c1671470 SR |
1229 | static void set_carrier_state(struct fwnet_device *dev) |
1230 | { | |
1231 | if (dev->peer_count > 1) | |
1232 | netif_carrier_on(dev->netdev); | |
1233 | else | |
1234 | netif_carrier_off(dev->netdev); | |
1235 | } | |
1236 | ||
f91e3bd8 SR |
1237 | /* ifup */ |
1238 | static int fwnet_open(struct net_device *net) | |
1239 | { | |
1240 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1241 | int ret; |
1242 | ||
f91e3bd8 SR |
1243 | if (dev->broadcast_state == FWNET_BROADCAST_ERROR) { |
1244 | ret = fwnet_broadcast_start(dev); | |
c76acec6 JF |
1245 | if (ret) |
1246 | return ret; | |
1247 | } | |
f91e3bd8 SR |
1248 | netif_start_queue(net); |
1249 | ||
c1671470 SR |
1250 | spin_lock_irq(&dev->lock); |
1251 | set_carrier_state(dev); | |
1252 | spin_unlock_irq(&dev->lock); | |
1253 | ||
c76acec6 JF |
1254 | return 0; |
1255 | } | |
1256 | ||
f91e3bd8 SR |
1257 | /* ifdown */ |
1258 | static int fwnet_stop(struct net_device *net) | |
c76acec6 | 1259 | { |
f91e3bd8 SR |
1260 | netif_stop_queue(net); |
1261 | ||
1262 | /* Deallocate iso context for use by other applications? */ | |
c76acec6 | 1263 | |
c76acec6 JF |
1264 | return 0; |
1265 | } | |
1266 | ||
424efe9c | 1267 | static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) |
c76acec6 | 1268 | { |
f91e3bd8 SR |
1269 | struct fwnet_header hdr_buf; |
1270 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1271 | __be16 proto; |
1272 | u16 dest_node; | |
c76acec6 JF |
1273 | unsigned max_payload; |
1274 | u16 dg_size; | |
1275 | u16 *datagram_label_ptr; | |
f91e3bd8 | 1276 | struct fwnet_packet_task *ptask; |
5a124d38 SR |
1277 | struct fwnet_peer *peer; |
1278 | unsigned long flags; | |
c76acec6 | 1279 | |
b2268830 SR |
1280 | spin_lock_irqsave(&dev->lock, flags); |
1281 | ||
1282 | /* Can this happen? */ | |
1283 | if (netif_queue_stopped(dev->netdev)) { | |
1284 | spin_unlock_irqrestore(&dev->lock, flags); | |
1285 | ||
1286 | return NETDEV_TX_BUSY; | |
1287 | } | |
1288 | ||
f91e3bd8 | 1289 | ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); |
c76acec6 JF |
1290 | if (ptask == NULL) |
1291 | goto fail; | |
1292 | ||
1293 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1294 | if (!skb) | |
1295 | goto fail; | |
1296 | ||
1297 | /* | |
f91e3bd8 | 1298 | * Make a copy of the driver-specific header. |
c76acec6 JF |
1299 | * We might need to rebuild the header on tx failure. |
1300 | */ | |
1301 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
1302 | skb_pull(skb, sizeof(hdr_buf)); | |
1303 | ||
1304 | proto = hdr_buf.h_proto; | |
1305 | dg_size = skb->len; | |
1306 | ||
1307 | /* | |
1308 | * Set the transmission type for the packet. ARP packets and IP | |
1309 | * broadcast packets are sent via GASP. | |
1310 | */ | |
f91e3bd8 | 1311 | if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0 |
c76acec6 | 1312 | || proto == htons(ETH_P_ARP) |
f91e3bd8 SR |
1313 | || (proto == htons(ETH_P_IP) |
1314 | && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { | |
5a124d38 | 1315 | max_payload = dev->broadcast_xmt_max_payload; |
f91e3bd8 SR |
1316 | datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; |
1317 | ||
5a124d38 SR |
1318 | ptask->fifo_addr = FWNET_NO_FIFO_ADDR; |
1319 | ptask->generation = 0; | |
1320 | ptask->dest_node = IEEE1394_ALL_NODES; | |
1321 | ptask->speed = SCODE_100; | |
c76acec6 | 1322 | } else { |
f91e3bd8 | 1323 | __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); |
c76acec6 JF |
1324 | u8 generation; |
1325 | ||
f91e3bd8 | 1326 | peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); |
5a124d38 | 1327 | if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR) |
b2268830 | 1328 | goto fail; |
c76acec6 | 1329 | |
5a124d38 SR |
1330 | generation = peer->generation; |
1331 | dest_node = peer->node_id; | |
1332 | max_payload = peer->max_payload; | |
f91e3bd8 | 1333 | datagram_label_ptr = &peer->datagram_label; |
c76acec6 | 1334 | |
5a124d38 SR |
1335 | ptask->fifo_addr = peer->fifo; |
1336 | ptask->generation = generation; | |
1337 | ptask->dest_node = dest_node; | |
1338 | ptask->speed = peer->speed; | |
c76acec6 JF |
1339 | } |
1340 | ||
1341 | /* If this is an ARP packet, convert it */ | |
1342 | if (proto == htons(ETH_P_ARP)) { | |
c76acec6 JF |
1343 | struct arphdr *arp = (struct arphdr *)skb->data; |
1344 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
f91e3bd8 SR |
1345 | struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data; |
1346 | __be32 ipaddr; | |
1347 | ||
1348 | ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN)); | |
1349 | ||
1350 | arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN; | |
1351 | arp1394->max_rec = dev->card->max_receive; | |
1352 | arp1394->sspd = dev->card->link_speed; | |
1353 | ||
1354 | put_unaligned_be16(dev->local_fifo >> 32, | |
1355 | &arp1394->fifo_hi); | |
1356 | put_unaligned_be32(dev->local_fifo & 0xffffffff, | |
1357 | &arp1394->fifo_lo); | |
1358 | put_unaligned(ipaddr, &arp1394->sip); | |
c76acec6 | 1359 | } |
c76acec6 JF |
1360 | |
1361 | ptask->hdr.w0 = 0; | |
1362 | ptask->hdr.w1 = 0; | |
1363 | ptask->skb = skb; | |
f91e3bd8 SR |
1364 | ptask->dev = dev; |
1365 | ||
c76acec6 | 1366 | /* Does it all fit in one packet? */ |
f91e3bd8 SR |
1367 | if (dg_size <= max_payload) { |
1368 | fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); | |
c76acec6 | 1369 | ptask->outstanding_pkts = 1; |
f91e3bd8 | 1370 | max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 JF |
1371 | } else { |
1372 | u16 datagram_label; | |
1373 | ||
f91e3bd8 | 1374 | max_payload -= RFC2374_FRAG_OVERHEAD; |
c76acec6 | 1375 | datagram_label = (*datagram_label_ptr)++; |
f91e3bd8 SR |
1376 | fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, |
1377 | datagram_label); | |
c76acec6 | 1378 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
f91e3bd8 | 1379 | max_payload += RFC2374_FRAG_HDR_SIZE; |
c76acec6 | 1380 | } |
5a124d38 | 1381 | |
b2268830 SR |
1382 | if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS) |
1383 | netif_stop_queue(dev->netdev); | |
48553011 | 1384 | |
5a124d38 SR |
1385 | spin_unlock_irqrestore(&dev->lock, flags); |
1386 | ||
c76acec6 | 1387 | ptask->max_payload = max_payload; |
48553011 | 1388 | ptask->enqueued = 0; |
110f82d7 | 1389 | |
f91e3bd8 SR |
1390 | fwnet_send_packet(ptask); |
1391 | ||
c76acec6 JF |
1392 | return NETDEV_TX_OK; |
1393 | ||
1394 | fail: | |
b2268830 SR |
1395 | spin_unlock_irqrestore(&dev->lock, flags); |
1396 | ||
c76acec6 | 1397 | if (ptask) |
f91e3bd8 | 1398 | kmem_cache_free(fwnet_packet_task_cache, ptask); |
c76acec6 JF |
1399 | |
1400 | if (skb != NULL) | |
1401 | dev_kfree_skb(skb); | |
1402 | ||
f91e3bd8 SR |
1403 | net->stats.tx_dropped++; |
1404 | net->stats.tx_errors++; | |
c76acec6 JF |
1405 | |
1406 | /* | |
1407 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1408 | * causes serious problems" here, allegedly. Before that patch, | |
1409 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1410 | * Perhaps more needs to be done? Stop the queue in serious | |
1411 | * conditions and restart it elsewhere? | |
1412 | */ | |
1413 | return NETDEV_TX_OK; | |
1414 | } | |
1415 | ||
f91e3bd8 SR |
1416 | static int fwnet_change_mtu(struct net_device *net, int new_mtu) |
1417 | { | |
c76acec6 JF |
1418 | if (new_mtu < 68) |
1419 | return -EINVAL; | |
1420 | ||
f91e3bd8 | 1421 | net->mtu = new_mtu; |
c76acec6 JF |
1422 | return 0; |
1423 | } | |
1424 | ||
18bb36f9 ML |
1425 | static const struct ethtool_ops fwnet_ethtool_ops = { |
1426 | .get_link = ethtool_op_get_link, | |
1427 | }; | |
1428 | ||
f91e3bd8 SR |
1429 | static const struct net_device_ops fwnet_netdev_ops = { |
1430 | .ndo_open = fwnet_open, | |
1431 | .ndo_stop = fwnet_stop, | |
1432 | .ndo_start_xmit = fwnet_tx, | |
f91e3bd8 | 1433 | .ndo_change_mtu = fwnet_change_mtu, |
c76acec6 JF |
1434 | }; |
1435 | ||
f91e3bd8 SR |
1436 | static void fwnet_init_dev(struct net_device *net) |
1437 | { | |
1438 | net->header_ops = &fwnet_header_ops; | |
1439 | net->netdev_ops = &fwnet_netdev_ops; | |
1337f853 | 1440 | net->watchdog_timeo = 2 * HZ; |
f91e3bd8 SR |
1441 | net->flags = IFF_BROADCAST | IFF_MULTICAST; |
1442 | net->features = NETIF_F_HIGHDMA; | |
1443 | net->addr_len = FWNET_ALEN; | |
1444 | net->hard_header_len = FWNET_HLEN; | |
1445 | net->type = ARPHRD_IEEE1394; | |
b2268830 | 1446 | net->tx_queue_len = FWNET_TX_QUEUE_LEN; |
18bb36f9 | 1447 | net->ethtool_ops = &fwnet_ethtool_ops; |
c76acec6 JF |
1448 | } |
1449 | ||
5a124d38 SR |
1450 | /* caller must hold fwnet_device_mutex */ |
1451 | static struct fwnet_device *fwnet_dev_find(struct fw_card *card) | |
1452 | { | |
1453 | struct fwnet_device *dev; | |
1454 | ||
1455 | list_for_each_entry(dev, &fwnet_device_list, dev_link) | |
1456 | if (dev->card == card) | |
1457 | return dev; | |
1458 | ||
1459 | return NULL; | |
1460 | } | |
1461 | ||
1462 | static int fwnet_add_peer(struct fwnet_device *dev, | |
1463 | struct fw_unit *unit, struct fw_device *device) | |
1464 | { | |
1465 | struct fwnet_peer *peer; | |
1466 | ||
1467 | peer = kmalloc(sizeof(*peer), GFP_KERNEL); | |
1468 | if (!peer) | |
1469 | return -ENOMEM; | |
1470 | ||
b01b4bab SR |
1471 | dev_set_drvdata(&unit->device, peer); |
1472 | ||
5a124d38 SR |
1473 | peer->dev = dev; |
1474 | peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; | |
1475 | peer->fifo = FWNET_NO_FIFO_ADDR; | |
74a14504 | 1476 | peer->ip = 0; |
5a124d38 SR |
1477 | INIT_LIST_HEAD(&peer->pd_list); |
1478 | peer->pdg_size = 0; | |
1479 | peer->datagram_label = 0; | |
1480 | peer->speed = device->max_speed; | |
1481 | peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); | |
1482 | ||
1483 | peer->generation = device->generation; | |
1484 | smp_rmb(); | |
1485 | peer->node_id = device->node_id; | |
1486 | ||
1487 | spin_lock_irq(&dev->lock); | |
1488 | list_add_tail(&peer->peer_link, &dev->peer_list); | |
18bb36f9 | 1489 | dev->peer_count++; |
c1671470 | 1490 | set_carrier_state(dev); |
5a124d38 SR |
1491 | spin_unlock_irq(&dev->lock); |
1492 | ||
1493 | return 0; | |
1494 | } | |
1495 | ||
f91e3bd8 SR |
1496 | static int fwnet_probe(struct device *_dev) |
1497 | { | |
1498 | struct fw_unit *unit = fw_unit(_dev); | |
1499 | struct fw_device *device = fw_parent_device(unit); | |
1500 | struct fw_card *card = device->card; | |
1501 | struct net_device *net; | |
b01b4bab | 1502 | bool allocated_netdev = false; |
f91e3bd8 | 1503 | struct fwnet_device *dev; |
c76acec6 | 1504 | unsigned max_mtu; |
5a124d38 | 1505 | int ret; |
c76acec6 | 1506 | |
5a124d38 | 1507 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1508 | |
5a124d38 SR |
1509 | dev = fwnet_dev_find(card); |
1510 | if (dev) { | |
5a124d38 SR |
1511 | net = dev->netdev; |
1512 | goto have_dev; | |
c76acec6 | 1513 | } |
5a124d38 | 1514 | |
f91e3bd8 SR |
1515 | net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev); |
1516 | if (net == NULL) { | |
5a124d38 | 1517 | ret = -ENOMEM; |
c76acec6 JF |
1518 | goto out; |
1519 | } | |
1520 | ||
b01b4bab | 1521 | allocated_netdev = true; |
f91e3bd8 SR |
1522 | SET_NETDEV_DEV(net, card->device); |
1523 | dev = netdev_priv(net); | |
c76acec6 | 1524 | |
f91e3bd8 SR |
1525 | spin_lock_init(&dev->lock); |
1526 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1527 | dev->broadcast_rcv_context = NULL; | |
1528 | dev->broadcast_xmt_max_payload = 0; | |
1529 | dev->broadcast_xmt_datagramlabel = 0; | |
f91e3bd8 | 1530 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
48553011 | 1531 | dev->queued_datagrams = 0; |
5a124d38 | 1532 | INIT_LIST_HEAD(&dev->peer_list); |
f91e3bd8 | 1533 | dev->card = card; |
5a124d38 | 1534 | dev->netdev = net; |
c76acec6 JF |
1535 | |
1536 | /* | |
1537 | * Use the RFC 2734 default 1500 octets or the maximum payload | |
1538 | * as initial MTU | |
1539 | */ | |
1540 | max_mtu = (1 << (card->max_receive + 1)) | |
f91e3bd8 SR |
1541 | - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; |
1542 | net->mtu = min(1500U, max_mtu); | |
c76acec6 JF |
1543 | |
1544 | /* Set our hardware address while we're at it */ | |
f91e3bd8 SR |
1545 | put_unaligned_be64(card->guid, net->dev_addr); |
1546 | put_unaligned_be64(~0ULL, net->broadcast); | |
5a124d38 SR |
1547 | ret = register_netdev(net); |
1548 | if (ret) { | |
f91e3bd8 | 1549 | fw_error("Cannot register the driver\n"); |
c76acec6 JF |
1550 | goto out; |
1551 | } | |
1552 | ||
5a124d38 | 1553 | list_add_tail(&dev->dev_link, &fwnet_device_list); |
f91e3bd8 SR |
1554 | fw_notify("%s: IPv4 over FireWire on device %016llx\n", |
1555 | net->name, (unsigned long long)card->guid); | |
5a124d38 SR |
1556 | have_dev: |
1557 | ret = fwnet_add_peer(dev, unit, device); | |
b01b4bab | 1558 | if (ret && allocated_netdev) { |
5a124d38 SR |
1559 | unregister_netdev(net); |
1560 | list_del(&dev->dev_link); | |
1561 | } | |
c76acec6 | 1562 | out: |
b01b4bab | 1563 | if (ret && allocated_netdev) |
f91e3bd8 SR |
1564 | free_netdev(net); |
1565 | ||
5a124d38 SR |
1566 | mutex_unlock(&fwnet_device_mutex); |
1567 | ||
1568 | return ret; | |
1569 | } | |
1570 | ||
c1671470 | 1571 | static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev) |
5a124d38 SR |
1572 | { |
1573 | struct fwnet_partial_datagram *pd, *pd_next; | |
1574 | ||
c1671470 | 1575 | spin_lock_irq(&dev->lock); |
5a124d38 | 1576 | list_del(&peer->peer_link); |
c1671470 SR |
1577 | dev->peer_count--; |
1578 | set_carrier_state(dev); | |
1579 | spin_unlock_irq(&dev->lock); | |
5a124d38 SR |
1580 | |
1581 | list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) | |
1582 | fwnet_pd_delete(pd); | |
1583 | ||
1584 | kfree(peer); | |
c76acec6 JF |
1585 | } |
1586 | ||
f91e3bd8 SR |
1587 | static int fwnet_remove(struct device *_dev) |
1588 | { | |
b01b4bab | 1589 | struct fwnet_peer *peer = dev_get_drvdata(_dev); |
5a124d38 | 1590 | struct fwnet_device *dev = peer->dev; |
f91e3bd8 | 1591 | struct net_device *net; |
48553011 | 1592 | int i; |
f91e3bd8 | 1593 | |
5a124d38 | 1594 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1595 | |
74a14504 ML |
1596 | net = dev->netdev; |
1597 | if (net && peer->ip) | |
1598 | arp_invalidate(net, peer->ip); | |
1599 | ||
c1671470 | 1600 | fwnet_remove_peer(peer, dev); |
18bb36f9 | 1601 | |
5a124d38 | 1602 | if (list_empty(&dev->peer_list)) { |
f91e3bd8 SR |
1603 | unregister_netdev(net); |
1604 | ||
1605 | if (dev->local_fifo != FWNET_NO_FIFO_ADDR) | |
1606 | fw_core_remove_address_handler(&dev->handler); | |
1607 | if (dev->broadcast_rcv_context) { | |
1608 | fw_iso_context_stop(dev->broadcast_rcv_context); | |
1609 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, | |
1610 | dev->card); | |
1611 | fw_iso_context_destroy(dev->broadcast_rcv_context); | |
c76acec6 | 1612 | } |
48553011 SR |
1613 | for (i = 0; dev->queued_datagrams && i < 5; i++) |
1614 | ssleep(1); | |
1615 | WARN_ON(dev->queued_datagrams); | |
b01b4bab SR |
1616 | list_del(&dev->dev_link); |
1617 | ||
f91e3bd8 | 1618 | free_netdev(net); |
c76acec6 | 1619 | } |
f91e3bd8 | 1620 | |
5a124d38 SR |
1621 | mutex_unlock(&fwnet_device_mutex); |
1622 | ||
c76acec6 JF |
1623 | return 0; |
1624 | } | |
1625 | ||
f91e3bd8 SR |
1626 | /* |
1627 | * FIXME abort partially sent fragmented datagrams, | |
1628 | * discard partially received fragmented datagrams | |
1629 | */ | |
1630 | static void fwnet_update(struct fw_unit *unit) | |
1631 | { | |
1632 | struct fw_device *device = fw_parent_device(unit); | |
b01b4bab | 1633 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); |
5a124d38 | 1634 | int generation; |
c76acec6 | 1635 | |
5a124d38 SR |
1636 | generation = device->generation; |
1637 | ||
1638 | spin_lock_irq(&peer->dev->lock); | |
1639 | peer->node_id = device->node_id; | |
1640 | peer->generation = generation; | |
1641 | spin_unlock_irq(&peer->dev->lock); | |
c76acec6 JF |
1642 | } |
1643 | ||
f91e3bd8 SR |
1644 | static const struct ieee1394_device_id fwnet_id_table[] = { |
1645 | { | |
1646 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1647 | IEEE1394_MATCH_VERSION, | |
1648 | .specifier_id = IANA_SPECIFIER_ID, | |
1649 | .version = RFC2734_SW_VERSION, | |
1650 | }, | |
1651 | { } | |
1652 | }; | |
1653 | ||
1654 | static struct fw_driver fwnet_driver = { | |
c76acec6 | 1655 | .driver = { |
f91e3bd8 SR |
1656 | .owner = THIS_MODULE, |
1657 | .name = "net", | |
1658 | .bus = &fw_bus_type, | |
1659 | .probe = fwnet_probe, | |
1660 | .remove = fwnet_remove, | |
c76acec6 | 1661 | }, |
f91e3bd8 SR |
1662 | .update = fwnet_update, |
1663 | .id_table = fwnet_id_table, | |
1664 | }; | |
1665 | ||
1666 | static const u32 rfc2374_unit_directory_data[] = { | |
1667 | 0x00040000, /* directory_length */ | |
1668 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1669 | 0x81000003, /* textual descriptor offset */ | |
1670 | 0x13000001, /* unit_sw_version: RFC 2734 */ | |
1671 | 0x81000005, /* textual descriptor offset */ | |
1672 | 0x00030000, /* descriptor_length */ | |
1673 | 0x00000000, /* text */ | |
1674 | 0x00000000, /* minimal ASCII, en */ | |
1675 | 0x49414e41, /* I A N A */ | |
1676 | 0x00030000, /* descriptor_length */ | |
1677 | 0x00000000, /* text */ | |
1678 | 0x00000000, /* minimal ASCII, en */ | |
1679 | 0x49507634, /* I P v 4 */ | |
1680 | }; | |
1681 | ||
1682 | static struct fw_descriptor rfc2374_unit_directory = { | |
1683 | .length = ARRAY_SIZE(rfc2374_unit_directory_data), | |
1684 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1685 | .data = rfc2374_unit_directory_data | |
c76acec6 JF |
1686 | }; |
1687 | ||
f91e3bd8 SR |
1688 | static int __init fwnet_init(void) |
1689 | { | |
1690 | int err; | |
1691 | ||
1692 | err = fw_core_add_descriptor(&rfc2374_unit_directory); | |
1693 | if (err) | |
1694 | return err; | |
c76acec6 | 1695 | |
f91e3bd8 SR |
1696 | fwnet_packet_task_cache = kmem_cache_create("packet_task", |
1697 | sizeof(struct fwnet_packet_task), 0, 0, NULL); | |
1698 | if (!fwnet_packet_task_cache) { | |
1699 | err = -ENOMEM; | |
1700 | goto out; | |
1701 | } | |
1702 | ||
1703 | err = driver_register(&fwnet_driver.driver); | |
1704 | if (!err) | |
1705 | return 0; | |
1706 | ||
1707 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1708 | out: | |
1709 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
1710 | ||
1711 | return err; | |
c76acec6 | 1712 | } |
f91e3bd8 | 1713 | module_init(fwnet_init); |
c76acec6 | 1714 | |
f91e3bd8 SR |
1715 | static void __exit fwnet_cleanup(void) |
1716 | { | |
1717 | driver_unregister(&fwnet_driver.driver); | |
1718 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1719 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
c76acec6 | 1720 | } |
f91e3bd8 | 1721 | module_exit(fwnet_cleanup); |
c76acec6 | 1722 | |
f91e3bd8 SR |
1723 | MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); |
1724 | MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734"); | |
1725 | MODULE_LICENSE("GPL"); | |
1726 | MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); |