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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> |
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 | |
021b97e4 YH |
87 | static bool fwnet_hwaddr_is_multicast(u8 *ha) |
88 | { | |
89 | return !!(*ha & 1); | |
90 | } | |
91 | ||
f91e3bd8 SR |
92 | /* IPv4 and IPv6 encapsulation header */ |
93 | struct rfc2734_header { | |
c76acec6 JF |
94 | u32 w0; |
95 | u32 w1; | |
96 | }; | |
97 | ||
f91e3bd8 SR |
98 | #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) |
99 | #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) | |
100 | #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16) | |
101 | #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) | |
102 | #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) | |
c76acec6 | 103 | |
f91e3bd8 SR |
104 | #define fwnet_set_hdr_lf(lf) ((lf) << 30) |
105 | #define fwnet_set_hdr_ether_type(et) (et) | |
106 | #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16) | |
107 | #define fwnet_set_hdr_fg_off(fgo) (fgo) | |
c76acec6 | 108 | |
f91e3bd8 | 109 | #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) |
c76acec6 | 110 | |
f91e3bd8 SR |
111 | static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, |
112 | unsigned ether_type) | |
113 | { | |
114 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) | |
115 | | fwnet_set_hdr_ether_type(ether_type); | |
116 | } | |
c76acec6 | 117 | |
f91e3bd8 SR |
118 | static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, |
119 | unsigned ether_type, unsigned dg_size, unsigned dgl) | |
120 | { | |
121 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) | |
122 | | fwnet_set_hdr_dg_size(dg_size) | |
123 | | fwnet_set_hdr_ether_type(ether_type); | |
124 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
125 | } | |
c76acec6 | 126 | |
f91e3bd8 SR |
127 | static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, |
128 | unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) | |
129 | { | |
130 | hdr->w0 = fwnet_set_hdr_lf(lf) | |
131 | | fwnet_set_hdr_dg_size(dg_size) | |
132 | | fwnet_set_hdr_fg_off(fg_off); | |
133 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
134 | } | |
c76acec6 JF |
135 | |
136 | /* This list keeps track of what parts of the datagram have been filled in */ | |
f91e3bd8 SR |
137 | struct fwnet_fragment_info { |
138 | struct list_head fi_link; | |
c76acec6 JF |
139 | u16 offset; |
140 | u16 len; | |
141 | }; | |
142 | ||
f91e3bd8 SR |
143 | struct fwnet_partial_datagram { |
144 | struct list_head pd_link; | |
145 | struct list_head fi_list; | |
c76acec6 JF |
146 | struct sk_buff *skb; |
147 | /* FIXME Why not use skb->data? */ | |
148 | char *pbuf; | |
149 | u16 datagram_label; | |
150 | u16 ether_type; | |
151 | u16 datagram_size; | |
152 | }; | |
153 | ||
5a124d38 SR |
154 | static DEFINE_MUTEX(fwnet_device_mutex); |
155 | static LIST_HEAD(fwnet_device_list); | |
c76acec6 | 156 | |
f91e3bd8 | 157 | struct fwnet_device { |
5a124d38 | 158 | struct list_head dev_link; |
c76acec6 | 159 | spinlock_t lock; |
f91e3bd8 SR |
160 | enum { |
161 | FWNET_BROADCAST_ERROR, | |
162 | FWNET_BROADCAST_RUNNING, | |
163 | FWNET_BROADCAST_STOPPED, | |
164 | } broadcast_state; | |
c76acec6 JF |
165 | struct fw_iso_context *broadcast_rcv_context; |
166 | struct fw_iso_buffer broadcast_rcv_buffer; | |
167 | void **broadcast_rcv_buffer_ptrs; | |
168 | unsigned broadcast_rcv_next_ptr; | |
169 | unsigned num_broadcast_rcv_ptrs; | |
170 | unsigned rcv_buffer_size; | |
171 | /* | |
172 | * This value is the maximum unfragmented datagram size that can be | |
173 | * sent by the hardware. It already has the GASP overhead and the | |
174 | * unfragmented datagram header overhead calculated into it. | |
175 | */ | |
176 | unsigned broadcast_xmt_max_payload; | |
177 | u16 broadcast_xmt_datagramlabel; | |
178 | ||
179 | /* | |
f91e3bd8 | 180 | * The CSR address that remote nodes must send datagrams to for us to |
c76acec6 JF |
181 | * receive them. |
182 | */ | |
183 | struct fw_address_handler handler; | |
184 | u64 local_fifo; | |
185 | ||
48553011 SR |
186 | /* Number of tx datagrams that have been queued but not yet acked */ |
187 | int queued_datagrams; | |
c76acec6 | 188 | |
c1671470 | 189 | int peer_count; |
5a124d38 | 190 | struct list_head peer_list; |
c76acec6 | 191 | struct fw_card *card; |
5a124d38 SR |
192 | struct net_device *netdev; |
193 | }; | |
194 | ||
195 | struct fwnet_peer { | |
196 | struct list_head peer_link; | |
197 | struct fwnet_device *dev; | |
198 | u64 guid; | |
199 | u64 fifo; | |
74a14504 | 200 | __be32 ip; |
5a124d38 SR |
201 | |
202 | /* guarded by dev->lock */ | |
203 | struct list_head pd_list; /* received partial datagrams */ | |
204 | unsigned pdg_size; /* pd_list size */ | |
205 | ||
206 | u16 datagram_label; /* outgoing datagram label */ | |
48553011 | 207 | u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ |
5a124d38 SR |
208 | int node_id; |
209 | int generation; | |
210 | unsigned speed; | |
c76acec6 JF |
211 | }; |
212 | ||
213 | /* This is our task struct. It's used for the packet complete callback. */ | |
f91e3bd8 | 214 | struct fwnet_packet_task { |
c76acec6 | 215 | struct fw_transaction transaction; |
f91e3bd8 | 216 | struct rfc2734_header hdr; |
c76acec6 | 217 | struct sk_buff *skb; |
f91e3bd8 SR |
218 | struct fwnet_device *dev; |
219 | ||
c76acec6 | 220 | int outstanding_pkts; |
c76acec6 JF |
221 | u64 fifo_addr; |
222 | u16 dest_node; | |
48553011 | 223 | u16 max_payload; |
c76acec6 JF |
224 | u8 generation; |
225 | u8 speed; | |
48553011 | 226 | u8 enqueued; |
c76acec6 JF |
227 | }; |
228 | ||
f91e3bd8 SR |
229 | /* |
230 | * saddr == NULL means use device source address. | |
231 | * daddr == NULL means leave destination address (eg unresolved arp). | |
232 | */ | |
233 | static int fwnet_header_create(struct sk_buff *skb, struct net_device *net, | |
234 | unsigned short type, const void *daddr, | |
235 | const void *saddr, unsigned len) | |
236 | { | |
237 | struct fwnet_header *h; | |
c76acec6 | 238 | |
f91e3bd8 SR |
239 | h = (struct fwnet_header *)skb_push(skb, sizeof(*h)); |
240 | put_unaligned_be16(type, &h->h_proto); | |
c76acec6 | 241 | |
f91e3bd8 SR |
242 | if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
243 | memset(h->h_dest, 0, net->addr_len); | |
c76acec6 | 244 | |
f91e3bd8 | 245 | return net->hard_header_len; |
c76acec6 JF |
246 | } |
247 | ||
248 | if (daddr) { | |
f91e3bd8 SR |
249 | memcpy(h->h_dest, daddr, net->addr_len); |
250 | ||
251 | return net->hard_header_len; | |
c76acec6 JF |
252 | } |
253 | ||
f91e3bd8 | 254 | return -net->hard_header_len; |
c76acec6 JF |
255 | } |
256 | ||
f91e3bd8 | 257 | static int fwnet_header_rebuild(struct sk_buff *skb) |
c76acec6 | 258 | { |
f91e3bd8 | 259 | struct fwnet_header *h = (struct fwnet_header *)skb->data; |
c76acec6 | 260 | |
f91e3bd8 SR |
261 | if (get_unaligned_be16(&h->h_proto) == ETH_P_IP) |
262 | return arp_find((unsigned char *)&h->h_dest, skb); | |
c76acec6 | 263 | |
8408dc1c SR |
264 | dev_notice(&skb->dev->dev, "unable to resolve type %04x addresses\n", |
265 | be16_to_cpu(h->h_proto)); | |
c76acec6 JF |
266 | return 0; |
267 | } | |
268 | ||
f91e3bd8 | 269 | static int fwnet_header_cache(const struct neighbour *neigh, |
e69dd336 | 270 | struct hh_cache *hh, __be16 type) |
f91e3bd8 SR |
271 | { |
272 | struct net_device *net; | |
273 | struct fwnet_header *h; | |
c76acec6 | 274 | |
e69dd336 | 275 | if (type == cpu_to_be16(ETH_P_802_3)) |
c76acec6 | 276 | return -1; |
f91e3bd8 | 277 | net = neigh->dev; |
82586340 | 278 | h = (struct fwnet_header *)((u8 *)hh->hh_data + HH_DATA_OFF(sizeof(*h))); |
e69dd336 | 279 | h->h_proto = type; |
f91e3bd8 SR |
280 | memcpy(h->h_dest, neigh->ha, net->addr_len); |
281 | hh->hh_len = FWNET_HLEN; | |
c76acec6 | 282 | |
c76acec6 JF |
283 | return 0; |
284 | } | |
285 | ||
286 | /* Called by Address Resolution module to notify changes in address. */ | |
f91e3bd8 SR |
287 | static void fwnet_header_cache_update(struct hh_cache *hh, |
288 | const struct net_device *net, const unsigned char *haddr) | |
289 | { | |
82586340 | 290 | memcpy((u8 *)hh->hh_data + HH_DATA_OFF(FWNET_HLEN), haddr, net->addr_len); |
c76acec6 JF |
291 | } |
292 | ||
f91e3bd8 SR |
293 | static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
294 | { | |
295 | memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN); | |
296 | ||
297 | return FWNET_ALEN; | |
c76acec6 JF |
298 | } |
299 | ||
f91e3bd8 SR |
300 | static const struct header_ops fwnet_header_ops = { |
301 | .create = fwnet_header_create, | |
302 | .rebuild = fwnet_header_rebuild, | |
303 | .cache = fwnet_header_cache, | |
304 | .cache_update = fwnet_header_cache_update, | |
305 | .parse = fwnet_header_parse, | |
c76acec6 JF |
306 | }; |
307 | ||
c76acec6 | 308 | /* FIXME: is this correct for all cases? */ |
f91e3bd8 SR |
309 | static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd, |
310 | unsigned offset, unsigned len) | |
c76acec6 | 311 | { |
f91e3bd8 | 312 | struct fwnet_fragment_info *fi; |
c76acec6 JF |
313 | unsigned end = offset + len; |
314 | ||
f91e3bd8 SR |
315 | list_for_each_entry(fi, &pd->fi_list, fi_link) |
316 | if (offset < fi->offset + fi->len && end > fi->offset) | |
c76acec6 | 317 | return true; |
f91e3bd8 | 318 | |
c76acec6 JF |
319 | return false; |
320 | } | |
321 | ||
322 | /* Assumes that new fragment does not overlap any existing fragments */ | |
f91e3bd8 SR |
323 | static struct fwnet_fragment_info *fwnet_frag_new( |
324 | struct fwnet_partial_datagram *pd, unsigned offset, unsigned len) | |
325 | { | |
326 | struct fwnet_fragment_info *fi, *fi2, *new; | |
c76acec6 JF |
327 | struct list_head *list; |
328 | ||
f91e3bd8 SR |
329 | list = &pd->fi_list; |
330 | list_for_each_entry(fi, &pd->fi_list, fi_link) { | |
c76acec6 JF |
331 | if (fi->offset + fi->len == offset) { |
332 | /* The new fragment can be tacked on to the end */ | |
333 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
334 | fi2 = list_entry(fi->fi_link.next, |
335 | struct fwnet_fragment_info, fi_link); | |
c76acec6 | 336 | if (fi->offset + fi->len == fi2->offset) { |
c76acec6 JF |
337 | /* glue fragments together */ |
338 | fi->len += len + fi2->len; | |
f91e3bd8 | 339 | list_del(&fi2->fi_link); |
c76acec6 JF |
340 | kfree(fi2); |
341 | } else { | |
c76acec6 JF |
342 | fi->len += len; |
343 | } | |
f91e3bd8 | 344 | |
c76acec6 JF |
345 | return fi; |
346 | } | |
347 | if (offset + len == fi->offset) { | |
348 | /* The new fragment can be tacked on to the beginning */ | |
349 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
350 | fi2 = list_entry(fi->fi_link.prev, |
351 | struct fwnet_fragment_info, fi_link); | |
c76acec6 JF |
352 | if (fi2->offset + fi2->len == fi->offset) { |
353 | /* glue fragments together */ | |
c76acec6 | 354 | fi2->len += fi->len + len; |
f91e3bd8 | 355 | list_del(&fi->fi_link); |
c76acec6 | 356 | kfree(fi); |
f91e3bd8 | 357 | |
c76acec6 JF |
358 | return fi2; |
359 | } | |
c76acec6 JF |
360 | fi->offset = offset; |
361 | fi->len += len; | |
f91e3bd8 | 362 | |
c76acec6 JF |
363 | return fi; |
364 | } | |
365 | if (offset > fi->offset + fi->len) { | |
f91e3bd8 | 366 | list = &fi->fi_link; |
c76acec6 JF |
367 | break; |
368 | } | |
369 | if (offset + len < fi->offset) { | |
f91e3bd8 | 370 | list = fi->fi_link.prev; |
c76acec6 JF |
371 | break; |
372 | } | |
373 | } | |
374 | ||
375 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
376 | if (!new) { | |
8408dc1c | 377 | dev_err(&pd->skb->dev->dev, "out of memory\n"); |
c76acec6 JF |
378 | return NULL; |
379 | } | |
380 | ||
381 | new->offset = offset; | |
382 | new->len = len; | |
f91e3bd8 SR |
383 | list_add(&new->fi_link, list); |
384 | ||
c76acec6 JF |
385 | return new; |
386 | } | |
387 | ||
f91e3bd8 SR |
388 | static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net, |
389 | struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size, | |
390 | void *frag_buf, unsigned frag_off, unsigned frag_len) | |
391 | { | |
392 | struct fwnet_partial_datagram *new; | |
393 | struct fwnet_fragment_info *fi; | |
c76acec6 JF |
394 | |
395 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
396 | if (!new) | |
397 | goto fail; | |
f91e3bd8 SR |
398 | |
399 | INIT_LIST_HEAD(&new->fi_list); | |
400 | fi = fwnet_frag_new(new, frag_off, frag_len); | |
401 | if (fi == NULL) | |
c76acec6 | 402 | goto fail_w_new; |
f91e3bd8 | 403 | |
c76acec6 JF |
404 | new->datagram_label = datagram_label; |
405 | new->datagram_size = dg_size; | |
82586340 | 406 | new->skb = dev_alloc_skb(dg_size + LL_RESERVED_SPACE(net)); |
f91e3bd8 | 407 | if (new->skb == NULL) |
c76acec6 | 408 | goto fail_w_fi; |
f91e3bd8 | 409 | |
82586340 | 410 | skb_reserve(new->skb, LL_RESERVED_SPACE(net)); |
c76acec6 JF |
411 | new->pbuf = skb_put(new->skb, dg_size); |
412 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
f91e3bd8 SR |
413 | list_add_tail(&new->pd_link, &peer->pd_list); |
414 | ||
c76acec6 JF |
415 | return new; |
416 | ||
417 | fail_w_fi: | |
418 | kfree(fi); | |
419 | fail_w_new: | |
420 | kfree(new); | |
421 | fail: | |
8408dc1c | 422 | dev_err(&net->dev, "out of memory\n"); |
f91e3bd8 | 423 | |
c76acec6 JF |
424 | return NULL; |
425 | } | |
426 | ||
f91e3bd8 SR |
427 | static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer, |
428 | u16 datagram_label) | |
429 | { | |
430 | struct fwnet_partial_datagram *pd; | |
c76acec6 | 431 | |
f91e3bd8 SR |
432 | list_for_each_entry(pd, &peer->pd_list, pd_link) |
433 | if (pd->datagram_label == datagram_label) | |
c76acec6 | 434 | return pd; |
f91e3bd8 | 435 | |
c76acec6 JF |
436 | return NULL; |
437 | } | |
438 | ||
439 | ||
f91e3bd8 SR |
440 | static void fwnet_pd_delete(struct fwnet_partial_datagram *old) |
441 | { | |
442 | struct fwnet_fragment_info *fi, *n; | |
c76acec6 | 443 | |
f91e3bd8 | 444 | list_for_each_entry_safe(fi, n, &old->fi_list, fi_link) |
c76acec6 | 445 | kfree(fi); |
f91e3bd8 SR |
446 | |
447 | list_del(&old->pd_link); | |
c76acec6 JF |
448 | dev_kfree_skb_any(old->skb); |
449 | kfree(old); | |
450 | } | |
451 | ||
f91e3bd8 SR |
452 | static bool fwnet_pd_update(struct fwnet_peer *peer, |
453 | struct fwnet_partial_datagram *pd, void *frag_buf, | |
454 | unsigned frag_off, unsigned frag_len) | |
455 | { | |
456 | if (fwnet_frag_new(pd, frag_off, frag_len) == NULL) | |
c76acec6 | 457 | return false; |
f91e3bd8 | 458 | |
c76acec6 JF |
459 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
460 | ||
461 | /* | |
25985edc | 462 | * Move list entry to beginning of list so that oldest partial |
c76acec6 JF |
463 | * datagrams percolate to the end of the list |
464 | */ | |
f91e3bd8 SR |
465 | list_move_tail(&pd->pd_link, &peer->pd_list); |
466 | ||
c76acec6 JF |
467 | return true; |
468 | } | |
469 | ||
f91e3bd8 SR |
470 | static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd) |
471 | { | |
472 | struct fwnet_fragment_info *fi; | |
c76acec6 | 473 | |
f91e3bd8 | 474 | fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link); |
c76acec6 | 475 | |
f91e3bd8 | 476 | return fi->len == pd->datagram_size; |
c76acec6 JF |
477 | } |
478 | ||
5a124d38 | 479 | /* caller must hold dev->lock */ |
f91e3bd8 SR |
480 | static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev, |
481 | u64 guid) | |
482 | { | |
5a124d38 | 483 | struct fwnet_peer *peer; |
c76acec6 | 484 | |
5a124d38 SR |
485 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
486 | if (peer->guid == guid) | |
487 | return peer; | |
c76acec6 | 488 | |
5a124d38 | 489 | return NULL; |
c76acec6 JF |
490 | } |
491 | ||
5a124d38 | 492 | /* caller must hold dev->lock */ |
f91e3bd8 | 493 | static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev, |
5a124d38 | 494 | int node_id, int generation) |
f91e3bd8 | 495 | { |
5a124d38 | 496 | struct fwnet_peer *peer; |
c76acec6 | 497 | |
5a124d38 SR |
498 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
499 | if (peer->node_id == node_id && | |
500 | peer->generation == generation) | |
501 | return peer; | |
f91e3bd8 | 502 | |
5a124d38 | 503 | return NULL; |
c76acec6 JF |
504 | } |
505 | ||
5a124d38 SR |
506 | /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */ |
507 | static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed) | |
f91e3bd8 | 508 | { |
5a124d38 | 509 | max_rec = min(max_rec, speed + 8); |
4ec4a67a | 510 | max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */ |
5a124d38 SR |
511 | |
512 | return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; | |
c76acec6 JF |
513 | } |
514 | ||
5a124d38 | 515 | |
f91e3bd8 SR |
516 | static int fwnet_finish_incoming_packet(struct net_device *net, |
517 | struct sk_buff *skb, u16 source_node_id, | |
518 | bool is_broadcast, u16 ether_type) | |
519 | { | |
520 | struct fwnet_device *dev; | |
521 | static const __be64 broadcast_hw = cpu_to_be64(~0ULL); | |
c76acec6 | 522 | int status; |
f91e3bd8 | 523 | __be64 guid; |
c76acec6 | 524 | |
18406d7e YH |
525 | switch (ether_type) { |
526 | case ETH_P_ARP: | |
527 | case ETH_P_IP: | |
528 | break; | |
529 | default: | |
530 | goto err; | |
531 | } | |
532 | ||
f91e3bd8 | 533 | dev = netdev_priv(net); |
c76acec6 | 534 | /* Write metadata, and then pass to the receive level */ |
f91e3bd8 | 535 | skb->dev = net; |
b577d7e2 | 536 | skb->ip_summed = CHECKSUM_NONE; |
c76acec6 JF |
537 | |
538 | /* | |
539 | * Parse the encapsulation header. This actually does the job of | |
540 | * converting to an ethernet frame header, as well as arp | |
541 | * conversion if needed. ARP conversion is easier in this | |
542 | * direction, since we are using ethernet as our backend. | |
543 | */ | |
544 | /* | |
545 | * If this is an ARP packet, convert it. First, we want to make | |
546 | * use of some of the fields, since they tell us a little bit | |
547 | * about the sending machine. | |
548 | */ | |
549 | if (ether_type == ETH_P_ARP) { | |
f91e3bd8 | 550 | struct rfc2734_arp *arp1394; |
c76acec6 JF |
551 | struct arphdr *arp; |
552 | unsigned char *arp_ptr; | |
553 | u64 fifo_addr; | |
f91e3bd8 | 554 | u64 peer_guid; |
f91e3bd8 | 555 | struct fwnet_peer *peer; |
5a124d38 SR |
556 | unsigned long flags; |
557 | ||
558 | arp1394 = (struct rfc2734_arp *)skb->data; | |
559 | arp = (struct arphdr *)skb->data; | |
560 | arp_ptr = (unsigned char *)(arp + 1); | |
561 | peer_guid = get_unaligned_be64(&arp1394->s_uniq_id); | |
562 | fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32 | |
563 | | get_unaligned_be32(&arp1394->fifo_lo); | |
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; | |
74a14504 | 569 | peer->ip = arp1394->sip; |
5a124d38 SR |
570 | } |
571 | spin_unlock_irqrestore(&dev->lock, flags); | |
572 | ||
f91e3bd8 | 573 | if (!peer) { |
8408dc1c SR |
574 | dev_notice(&net->dev, |
575 | "no peer for ARP packet from %016llx\n", | |
576 | (unsigned long long)peer_guid); | |
1bf145fe | 577 | goto no_peer; |
c76acec6 | 578 | } |
f91e3bd8 | 579 | |
c76acec6 JF |
580 | /* |
581 | * Now that we're done with the 1394 specific stuff, we'll | |
582 | * need to alter some of the data. Believe it or not, all | |
583 | * that needs to be done is sender_IP_address needs to be | |
584 | * moved, the destination hardware address get stuffed | |
585 | * in and the hardware address length set to 8. | |
586 | * | |
587 | * IMPORTANT: The code below overwrites 1394 specific data | |
588 | * needed above so keep the munging of the data for the | |
589 | * higher level IP stack last. | |
590 | */ | |
591 | ||
592 | arp->ar_hln = 8; | |
f91e3bd8 SR |
593 | /* skip over sender unique id */ |
594 | arp_ptr += arp->ar_hln; | |
595 | /* move sender IP addr */ | |
596 | put_unaligned(arp1394->sip, (u32 *)arp_ptr); | |
597 | /* skip over sender IP addr */ | |
598 | arp_ptr += arp->ar_pln; | |
c76acec6 JF |
599 | |
600 | if (arp->ar_op == htons(ARPOP_REQUEST)) | |
601 | memset(arp_ptr, 0, sizeof(u64)); | |
602 | else | |
f91e3bd8 | 603 | memcpy(arp_ptr, net->dev_addr, sizeof(u64)); |
c76acec6 JF |
604 | } |
605 | ||
606 | /* Now add the ethernet header. */ | |
f91e3bd8 SR |
607 | guid = cpu_to_be64(dev->card->guid); |
608 | if (dev_hard_header(skb, net, ether_type, | |
609 | is_broadcast ? &broadcast_hw : &guid, | |
610 | NULL, skb->len) >= 0) { | |
611 | struct fwnet_header *eth; | |
c76acec6 JF |
612 | u16 *rawp; |
613 | __be16 protocol; | |
614 | ||
615 | skb_reset_mac_header(skb); | |
616 | skb_pull(skb, sizeof(*eth)); | |
f91e3bd8 | 617 | eth = (struct fwnet_header *)skb_mac_header(skb); |
021b97e4 | 618 | if (fwnet_hwaddr_is_multicast(eth->h_dest)) { |
f91e3bd8 SR |
619 | if (memcmp(eth->h_dest, net->broadcast, |
620 | net->addr_len) == 0) | |
c76acec6 | 621 | skb->pkt_type = PACKET_BROADCAST; |
c76acec6 JF |
622 | #if 0 |
623 | else | |
624 | skb->pkt_type = PACKET_MULTICAST; | |
625 | #endif | |
626 | } else { | |
156ce867 | 627 | if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) |
c76acec6 | 628 | skb->pkt_type = PACKET_OTHERHOST; |
c76acec6 JF |
629 | } |
630 | if (ntohs(eth->h_proto) >= 1536) { | |
c76acec6 JF |
631 | protocol = eth->h_proto; |
632 | } else { | |
633 | rawp = (u16 *)skb->data; | |
f91e3bd8 | 634 | if (*rawp == 0xffff) |
c76acec6 | 635 | protocol = htons(ETH_P_802_3); |
f91e3bd8 | 636 | else |
c76acec6 | 637 | protocol = htons(ETH_P_802_2); |
c76acec6 JF |
638 | } |
639 | skb->protocol = protocol; | |
640 | } | |
641 | status = netif_rx(skb); | |
f91e3bd8 SR |
642 | if (status == NET_RX_DROP) { |
643 | net->stats.rx_errors++; | |
644 | net->stats.rx_dropped++; | |
c76acec6 | 645 | } else { |
f91e3bd8 SR |
646 | net->stats.rx_packets++; |
647 | net->stats.rx_bytes += skb->len; | |
c76acec6 | 648 | } |
f91e3bd8 | 649 | |
c76acec6 JF |
650 | return 0; |
651 | ||
1bf145fe | 652 | no_peer: |
18406d7e | 653 | err: |
f91e3bd8 SR |
654 | net->stats.rx_errors++; |
655 | net->stats.rx_dropped++; | |
656 | ||
c76acec6 | 657 | dev_kfree_skb_any(skb); |
f91e3bd8 | 658 | |
1bf145fe | 659 | return -ENOENT; |
c76acec6 JF |
660 | } |
661 | ||
f91e3bd8 | 662 | static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, |
5a124d38 SR |
663 | int source_node_id, int generation, |
664 | bool is_broadcast) | |
f91e3bd8 | 665 | { |
c76acec6 | 666 | struct sk_buff *skb; |
5a124d38 | 667 | struct net_device *net = dev->netdev; |
f91e3bd8 | 668 | struct rfc2734_header hdr; |
c76acec6 JF |
669 | unsigned lf; |
670 | unsigned long flags; | |
f91e3bd8 SR |
671 | struct fwnet_peer *peer; |
672 | struct fwnet_partial_datagram *pd; | |
c76acec6 JF |
673 | int fg_off; |
674 | int dg_size; | |
675 | u16 datagram_label; | |
676 | int retval; | |
677 | u16 ether_type; | |
678 | ||
f91e3bd8 SR |
679 | hdr.w0 = be32_to_cpu(buf[0]); |
680 | lf = fwnet_get_hdr_lf(&hdr); | |
681 | if (lf == RFC2374_HDR_UNFRAG) { | |
c76acec6 JF |
682 | /* |
683 | * An unfragmented datagram has been received by the ieee1394 | |
684 | * bus. Build an skbuff around it so we can pass it to the | |
685 | * high level network layer. | |
686 | */ | |
f91e3bd8 | 687 | ether_type = fwnet_get_hdr_ether_type(&hdr); |
c76acec6 | 688 | buf++; |
f91e3bd8 | 689 | len -= RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 | 690 | |
82586340 | 691 | skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net)); |
c76acec6 | 692 | if (unlikely(!skb)) { |
8408dc1c | 693 | dev_err(&net->dev, "out of memory\n"); |
f91e3bd8 SR |
694 | net->stats.rx_dropped++; |
695 | ||
1bf145fe | 696 | return -ENOMEM; |
c76acec6 | 697 | } |
82586340 | 698 | skb_reserve(skb, LL_RESERVED_SPACE(net)); |
f91e3bd8 SR |
699 | memcpy(skb_put(skb, len), buf, len); |
700 | ||
701 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
702 | is_broadcast, ether_type); | |
c76acec6 JF |
703 | } |
704 | /* A datagram fragment has been received, now the fun begins. */ | |
705 | hdr.w1 = ntohl(buf[1]); | |
f91e3bd8 SR |
706 | buf += 2; |
707 | len -= RFC2374_FRAG_HDR_SIZE; | |
708 | if (lf == RFC2374_HDR_FIRSTFRAG) { | |
709 | ether_type = fwnet_get_hdr_ether_type(&hdr); | |
c76acec6 JF |
710 | fg_off = 0; |
711 | } else { | |
f91e3bd8 SR |
712 | ether_type = 0; |
713 | fg_off = fwnet_get_hdr_fg_off(&hdr); | |
c76acec6 | 714 | } |
f91e3bd8 SR |
715 | datagram_label = fwnet_get_hdr_dgl(&hdr); |
716 | dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */ | |
f91e3bd8 | 717 | |
5a124d38 SR |
718 | spin_lock_irqsave(&dev->lock, flags); |
719 | ||
720 | peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); | |
1bf145fe SR |
721 | if (!peer) { |
722 | retval = -ENOENT; | |
723 | goto fail; | |
724 | } | |
f91e3bd8 SR |
725 | |
726 | pd = fwnet_pd_find(peer, datagram_label); | |
c76acec6 | 727 | if (pd == NULL) { |
f91e3bd8 | 728 | while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { |
c76acec6 | 729 | /* remove the oldest */ |
f91e3bd8 SR |
730 | fwnet_pd_delete(list_first_entry(&peer->pd_list, |
731 | struct fwnet_partial_datagram, pd_link)); | |
732 | peer->pdg_size--; | |
c76acec6 | 733 | } |
f91e3bd8 SR |
734 | pd = fwnet_pd_new(net, peer, datagram_label, |
735 | dg_size, buf, fg_off, len); | |
736 | if (pd == NULL) { | |
c76acec6 | 737 | retval = -ENOMEM; |
1bf145fe | 738 | goto fail; |
c76acec6 | 739 | } |
f91e3bd8 | 740 | peer->pdg_size++; |
c76acec6 | 741 | } else { |
f91e3bd8 SR |
742 | if (fwnet_frag_overlap(pd, fg_off, len) || |
743 | pd->datagram_size != dg_size) { | |
c76acec6 JF |
744 | /* |
745 | * Differing datagram sizes or overlapping fragments, | |
f91e3bd8 | 746 | * discard old datagram and start a new one. |
c76acec6 | 747 | */ |
f91e3bd8 SR |
748 | fwnet_pd_delete(pd); |
749 | pd = fwnet_pd_new(net, peer, datagram_label, | |
750 | dg_size, buf, fg_off, len); | |
751 | if (pd == NULL) { | |
f91e3bd8 | 752 | peer->pdg_size--; |
1bf145fe SR |
753 | retval = -ENOMEM; |
754 | goto fail; | |
c76acec6 JF |
755 | } |
756 | } else { | |
f91e3bd8 | 757 | if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { |
c76acec6 JF |
758 | /* |
759 | * Couldn't save off fragment anyway | |
760 | * so might as well obliterate the | |
761 | * datagram now. | |
762 | */ | |
f91e3bd8 SR |
763 | fwnet_pd_delete(pd); |
764 | peer->pdg_size--; | |
1bf145fe SR |
765 | retval = -ENOMEM; |
766 | goto fail; | |
c76acec6 JF |
767 | } |
768 | } | |
769 | } /* new datagram or add to existing one */ | |
770 | ||
f91e3bd8 | 771 | if (lf == RFC2374_HDR_FIRSTFRAG) |
c76acec6 | 772 | pd->ether_type = ether_type; |
f91e3bd8 SR |
773 | |
774 | if (fwnet_pd_is_complete(pd)) { | |
c76acec6 | 775 | ether_type = pd->ether_type; |
f91e3bd8 | 776 | peer->pdg_size--; |
c76acec6 | 777 | skb = skb_get(pd->skb); |
f91e3bd8 SR |
778 | fwnet_pd_delete(pd); |
779 | ||
5a124d38 | 780 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
781 | |
782 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
783 | false, ether_type); | |
c76acec6 JF |
784 | } |
785 | /* | |
786 | * Datagram is not complete, we're done for the | |
787 | * moment. | |
788 | */ | |
b2268830 | 789 | retval = 0; |
1bf145fe | 790 | fail: |
5a124d38 | 791 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 | 792 | |
1bf145fe | 793 | return retval; |
c76acec6 JF |
794 | } |
795 | ||
f91e3bd8 SR |
796 | static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |
797 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
798 | unsigned long long offset, void *payload, size_t length, |
799 | void *callback_data) | |
f91e3bd8 | 800 | { |
00635b8e SR |
801 | struct fwnet_device *dev = callback_data; |
802 | int rcode; | |
c76acec6 | 803 | |
00635b8e SR |
804 | if (destination == IEEE1394_ALL_NODES) { |
805 | kfree(r); | |
f91e3bd8 | 806 | |
c76acec6 JF |
807 | return; |
808 | } | |
f91e3bd8 | 809 | |
00635b8e SR |
810 | if (offset != dev->handler.offset) |
811 | rcode = RCODE_ADDRESS_ERROR; | |
812 | else if (tcode != TCODE_WRITE_BLOCK_REQUEST) | |
813 | rcode = RCODE_TYPE_ERROR; | |
814 | else if (fwnet_incoming_packet(dev, payload, length, | |
815 | source, generation, false) != 0) { | |
8408dc1c | 816 | dev_err(&dev->netdev->dev, "incoming packet failure\n"); |
00635b8e SR |
817 | rcode = RCODE_CONFLICT_ERROR; |
818 | } else | |
819 | rcode = RCODE_COMPLETE; | |
f91e3bd8 | 820 | |
00635b8e | 821 | fw_send_response(card, r, rcode); |
c76acec6 JF |
822 | } |
823 | ||
f91e3bd8 SR |
824 | static void fwnet_receive_broadcast(struct fw_iso_context *context, |
825 | u32 cycle, size_t header_length, void *header, void *data) | |
826 | { | |
827 | struct fwnet_device *dev; | |
c76acec6 | 828 | struct fw_iso_packet packet; |
f91e3bd8 SR |
829 | __be16 *hdr_ptr; |
830 | __be32 *buf_ptr; | |
c76acec6 JF |
831 | int retval; |
832 | u32 length; | |
833 | u16 source_node_id; | |
834 | u32 specifier_id; | |
835 | u32 ver; | |
836 | unsigned long offset; | |
837 | unsigned long flags; | |
838 | ||
f91e3bd8 | 839 | dev = data; |
c76acec6 | 840 | hdr_ptr = header; |
f91e3bd8 SR |
841 | length = be16_to_cpup(hdr_ptr); |
842 | ||
843 | spin_lock_irqsave(&dev->lock, flags); | |
844 | ||
845 | offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; | |
846 | buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; | |
847 | if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) | |
848 | dev->broadcast_rcv_next_ptr = 0; | |
849 | ||
850 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
851 | |
852 | specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 | |
853 | | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; | |
f91e3bd8 | 854 | ver = be32_to_cpu(buf_ptr[1]) & 0xffffff; |
c76acec6 | 855 | source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; |
f91e3bd8 SR |
856 | |
857 | if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) { | |
c76acec6 | 858 | buf_ptr += 2; |
f91e3bd8 | 859 | length -= IEEE1394_GASP_HDR_SIZE; |
9d237342 SG |
860 | fwnet_incoming_packet(dev, buf_ptr, length, source_node_id, |
861 | context->card->generation, true); | |
f91e3bd8 SR |
862 | } |
863 | ||
864 | packet.payload_length = dev->rcv_buffer_size; | |
c76acec6 JF |
865 | packet.interrupt = 1; |
866 | packet.skip = 0; | |
867 | packet.tag = 3; | |
868 | packet.sy = 0; | |
f91e3bd8 SR |
869 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
870 | ||
871 | spin_lock_irqsave(&dev->lock, flags); | |
c76acec6 | 872 | |
f91e3bd8 SR |
873 | retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, |
874 | &dev->broadcast_rcv_buffer, offset); | |
875 | ||
876 | spin_unlock_irqrestore(&dev->lock, flags); | |
877 | ||
13882a82 CL |
878 | if (retval >= 0) |
879 | fw_iso_context_queue_flush(dev->broadcast_rcv_context); | |
880 | else | |
8408dc1c | 881 | dev_err(&dev->netdev->dev, "requeue failed\n"); |
c76acec6 JF |
882 | } |
883 | ||
f91e3bd8 SR |
884 | static struct kmem_cache *fwnet_packet_task_cache; |
885 | ||
110f82d7 SR |
886 | static void fwnet_free_ptask(struct fwnet_packet_task *ptask) |
887 | { | |
888 | dev_kfree_skb_any(ptask->skb); | |
889 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
890 | } | |
891 | ||
b2268830 SR |
892 | /* Caller must hold dev->lock. */ |
893 | static void dec_queued_datagrams(struct fwnet_device *dev) | |
894 | { | |
895 | if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS) | |
896 | netif_wake_queue(dev->netdev); | |
897 | } | |
898 | ||
f91e3bd8 SR |
899 | static int fwnet_send_packet(struct fwnet_packet_task *ptask); |
900 | ||
901 | static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) | |
902 | { | |
110f82d7 | 903 | struct fwnet_device *dev = ptask->dev; |
902bca00 | 904 | struct sk_buff *skb = ptask->skb; |
c76acec6 | 905 | unsigned long flags; |
110f82d7 | 906 | bool free; |
f91e3bd8 SR |
907 | |
908 | spin_lock_irqsave(&dev->lock, flags); | |
f91e3bd8 | 909 | |
110f82d7 SR |
910 | ptask->outstanding_pkts--; |
911 | ||
912 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 913 | free = (ptask->outstanding_pkts == 0 && ptask->enqueued); |
7ee11fa8 | 914 | if (free) |
b2268830 | 915 | dec_queued_datagrams(dev); |
110f82d7 | 916 | |
902bca00 | 917 | if (ptask->outstanding_pkts == 0) { |
902bca00 SR |
918 | dev->netdev->stats.tx_packets++; |
919 | dev->netdev->stats.tx_bytes += skb->len; | |
920 | } | |
110f82d7 SR |
921 | |
922 | spin_unlock_irqrestore(&dev->lock, flags); | |
f91e3bd8 SR |
923 | |
924 | if (ptask->outstanding_pkts > 0) { | |
c76acec6 JF |
925 | u16 dg_size; |
926 | u16 fg_off; | |
927 | u16 datagram_label; | |
928 | u16 lf; | |
c76acec6 JF |
929 | |
930 | /* Update the ptask to point to the next fragment and send it */ | |
f91e3bd8 | 931 | lf = fwnet_get_hdr_lf(&ptask->hdr); |
c76acec6 | 932 | switch (lf) { |
f91e3bd8 SR |
933 | case RFC2374_HDR_LASTFRAG: |
934 | case RFC2374_HDR_UNFRAG: | |
c76acec6 | 935 | default: |
8408dc1c SR |
936 | dev_err(&dev->netdev->dev, |
937 | "outstanding packet %x lf %x, header %x,%x\n", | |
938 | ptask->outstanding_pkts, lf, ptask->hdr.w0, | |
939 | ptask->hdr.w1); | |
c76acec6 JF |
940 | BUG(); |
941 | ||
f91e3bd8 | 942 | case RFC2374_HDR_FIRSTFRAG: |
c76acec6 | 943 | /* Set frag type here for future interior fragments */ |
f91e3bd8 SR |
944 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); |
945 | fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
946 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
947 | break; |
948 | ||
f91e3bd8 SR |
949 | case RFC2374_HDR_INTFRAG: |
950 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); | |
951 | fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) | |
952 | + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
953 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
954 | break; |
955 | } | |
902bca00 | 956 | |
9d237342 SG |
957 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
958 | skb_pull(skb, | |
959 | ptask->max_payload + IEEE1394_GASP_HDR_SIZE); | |
960 | } else { | |
961 | skb_pull(skb, ptask->max_payload); | |
962 | } | |
f91e3bd8 SR |
963 | if (ptask->outstanding_pkts > 1) { |
964 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, | |
965 | dg_size, fg_off, datagram_label); | |
c76acec6 | 966 | } else { |
f91e3bd8 SR |
967 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, |
968 | dg_size, fg_off, datagram_label); | |
969 | ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; | |
c76acec6 | 970 | } |
f91e3bd8 | 971 | fwnet_send_packet(ptask); |
c76acec6 | 972 | } |
110f82d7 SR |
973 | |
974 | if (free) | |
975 | fwnet_free_ptask(ptask); | |
c76acec6 JF |
976 | } |
977 | ||
7ee11fa8 SR |
978 | static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask) |
979 | { | |
980 | struct fwnet_device *dev = ptask->dev; | |
981 | unsigned long flags; | |
982 | bool free; | |
983 | ||
984 | spin_lock_irqsave(&dev->lock, flags); | |
985 | ||
986 | /* One fragment failed; don't try to send remaining fragments. */ | |
987 | ptask->outstanding_pkts = 0; | |
988 | ||
989 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 990 | free = ptask->enqueued; |
7ee11fa8 | 991 | if (free) |
b2268830 | 992 | dec_queued_datagrams(dev); |
7ee11fa8 SR |
993 | |
994 | dev->netdev->stats.tx_dropped++; | |
995 | dev->netdev->stats.tx_errors++; | |
996 | ||
997 | spin_unlock_irqrestore(&dev->lock, flags); | |
998 | ||
999 | if (free) | |
1000 | fwnet_free_ptask(ptask); | |
1001 | } | |
1002 | ||
f91e3bd8 SR |
1003 | static void fwnet_write_complete(struct fw_card *card, int rcode, |
1004 | void *payload, size_t length, void *data) | |
1005 | { | |
c4d6fd40 ML |
1006 | struct fwnet_packet_task *ptask = data; |
1007 | static unsigned long j; | |
1008 | static int last_rcode, errors_skipped; | |
c76acec6 | 1009 | |
7ee11fa8 | 1010 | if (rcode == RCODE_COMPLETE) { |
f91e3bd8 | 1011 | fwnet_transmit_packet_done(ptask); |
7ee11fa8 | 1012 | } else { |
7ee11fa8 | 1013 | fwnet_transmit_packet_failed(ptask); |
c4d6fd40 ML |
1014 | |
1015 | if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) { | |
8408dc1c SR |
1016 | dev_err(&ptask->dev->netdev->dev, |
1017 | "fwnet_write_complete failed: %x (skipped %d)\n", | |
1018 | rcode, errors_skipped); | |
c4d6fd40 ML |
1019 | |
1020 | errors_skipped = 0; | |
1021 | last_rcode = rcode; | |
1022 | } else | |
1023 | errors_skipped++; | |
7ee11fa8 | 1024 | } |
c76acec6 JF |
1025 | } |
1026 | ||
f91e3bd8 SR |
1027 | static int fwnet_send_packet(struct fwnet_packet_task *ptask) |
1028 | { | |
1029 | struct fwnet_device *dev; | |
c76acec6 | 1030 | unsigned tx_len; |
f91e3bd8 | 1031 | struct rfc2734_header *bufhdr; |
c76acec6 | 1032 | unsigned long flags; |
110f82d7 | 1033 | bool free; |
c76acec6 | 1034 | |
f91e3bd8 | 1035 | dev = ptask->dev; |
c76acec6 | 1036 | tx_len = ptask->max_payload; |
f91e3bd8 SR |
1037 | switch (fwnet_get_hdr_lf(&ptask->hdr)) { |
1038 | case RFC2374_HDR_UNFRAG: | |
1039 | bufhdr = (struct rfc2734_header *) | |
1040 | skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); | |
1041 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
c76acec6 JF |
1042 | break; |
1043 | ||
f91e3bd8 SR |
1044 | case RFC2374_HDR_FIRSTFRAG: |
1045 | case RFC2374_HDR_INTFRAG: | |
1046 | case RFC2374_HDR_LASTFRAG: | |
1047 | bufhdr = (struct rfc2734_header *) | |
1048 | skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); | |
1049 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
1050 | put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); | |
c76acec6 JF |
1051 | break; |
1052 | ||
1053 | default: | |
1054 | BUG(); | |
1055 | } | |
f91e3bd8 SR |
1056 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
1057 | u8 *p; | |
c76acec6 | 1058 | int generation; |
f91e3bd8 | 1059 | int node_id; |
c76acec6 JF |
1060 | |
1061 | /* ptask->generation may not have been set yet */ | |
f91e3bd8 | 1062 | generation = dev->card->generation; |
c76acec6 | 1063 | smp_rmb(); |
f91e3bd8 SR |
1064 | node_id = dev->card->node_id; |
1065 | ||
9d237342 | 1066 | p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE); |
f91e3bd8 SR |
1067 | put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); |
1068 | put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 | |
1069 | | RFC2734_SW_VERSION, &p[4]); | |
1070 | ||
1071 | /* We should not transmit if broadcast_channel.valid == 0. */ | |
1072 | fw_send_request(dev->card, &ptask->transaction, | |
1073 | TCODE_STREAM_DATA, | |
1074 | fw_stream_packet_destination_id(3, | |
1075 | IEEE1394_BROADCAST_CHANNEL, 0), | |
1076 | generation, SCODE_100, 0ULL, ptask->skb->data, | |
1077 | tx_len + 8, fwnet_write_complete, ptask); | |
1078 | ||
f91e3bd8 | 1079 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1080 | |
1081 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1082 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1083 | if (!free) |
48553011 SR |
1084 | ptask->enqueued = true; |
1085 | else | |
b2268830 | 1086 | dec_queued_datagrams(dev); |
110f82d7 | 1087 | |
f91e3bd8 SR |
1088 | spin_unlock_irqrestore(&dev->lock, flags); |
1089 | ||
110f82d7 | 1090 | goto out; |
c76acec6 | 1091 | } |
f91e3bd8 SR |
1092 | |
1093 | fw_send_request(dev->card, &ptask->transaction, | |
1094 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, | |
1095 | ptask->generation, ptask->speed, ptask->fifo_addr, | |
1096 | ptask->skb->data, tx_len, fwnet_write_complete, ptask); | |
1097 | ||
f91e3bd8 | 1098 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1099 | |
1100 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1101 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1102 | if (!free) |
48553011 SR |
1103 | ptask->enqueued = true; |
1104 | else | |
b2268830 | 1105 | dec_queued_datagrams(dev); |
110f82d7 | 1106 | |
f91e3bd8 SR |
1107 | spin_unlock_irqrestore(&dev->lock, flags); |
1108 | ||
5a124d38 | 1109 | dev->netdev->trans_start = jiffies; |
110f82d7 SR |
1110 | out: |
1111 | if (free) | |
1112 | fwnet_free_ptask(ptask); | |
f91e3bd8 | 1113 | |
c76acec6 JF |
1114 | return 0; |
1115 | } | |
1116 | ||
9d39c90a YH |
1117 | static void fwnet_fifo_stop(struct fwnet_device *dev) |
1118 | { | |
1119 | if (dev->local_fifo == FWNET_NO_FIFO_ADDR) | |
1120 | return; | |
1121 | ||
1122 | fw_core_remove_address_handler(&dev->handler); | |
1123 | dev->local_fifo = FWNET_NO_FIFO_ADDR; | |
1124 | } | |
1125 | ||
1126 | static int fwnet_fifo_start(struct fwnet_device *dev) | |
1127 | { | |
1128 | int retval; | |
1129 | ||
1130 | if (dev->local_fifo != FWNET_NO_FIFO_ADDR) | |
1131 | return 0; | |
1132 | ||
1133 | dev->handler.length = 4096; | |
1134 | dev->handler.address_callback = fwnet_receive_packet; | |
1135 | dev->handler.callback_data = dev; | |
1136 | ||
1137 | retval = fw_core_add_address_handler(&dev->handler, | |
1138 | &fw_high_memory_region); | |
1139 | if (retval < 0) | |
1140 | return retval; | |
1141 | ||
1142 | dev->local_fifo = dev->handler.offset; | |
1143 | ||
1144 | return 0; | |
1145 | } | |
1146 | ||
111534cd YH |
1147 | static void __fwnet_broadcast_stop(struct fwnet_device *dev) |
1148 | { | |
1149 | unsigned u; | |
1150 | ||
1151 | if (dev->broadcast_state != FWNET_BROADCAST_ERROR) { | |
1152 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) | |
1153 | kunmap(dev->broadcast_rcv_buffer.pages[u]); | |
1154 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); | |
1155 | } | |
1156 | if (dev->broadcast_rcv_context) { | |
1157 | fw_iso_context_destroy(dev->broadcast_rcv_context); | |
1158 | dev->broadcast_rcv_context = NULL; | |
1159 | } | |
1160 | kfree(dev->broadcast_rcv_buffer_ptrs); | |
1161 | dev->broadcast_rcv_buffer_ptrs = NULL; | |
1162 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1163 | } | |
1164 | ||
1165 | static void fwnet_broadcast_stop(struct fwnet_device *dev) | |
1166 | { | |
1167 | if (dev->broadcast_state == FWNET_BROADCAST_ERROR) | |
1168 | return; | |
1169 | fw_iso_context_stop(dev->broadcast_rcv_context); | |
1170 | __fwnet_broadcast_stop(dev); | |
1171 | } | |
1172 | ||
f91e3bd8 SR |
1173 | static int fwnet_broadcast_start(struct fwnet_device *dev) |
1174 | { | |
c76acec6 JF |
1175 | struct fw_iso_context *context; |
1176 | int retval; | |
1177 | unsigned num_packets; | |
1178 | unsigned max_receive; | |
1179 | struct fw_iso_packet packet; | |
1180 | unsigned long offset; | |
f2090594 | 1181 | void **ptrptr; |
c76acec6 | 1182 | unsigned u; |
c76acec6 | 1183 | |
2fbd8dfe YH |
1184 | if (dev->broadcast_state != FWNET_BROADCAST_ERROR) |
1185 | return 0; | |
1186 | ||
f91e3bd8 SR |
1187 | max_receive = 1U << (dev->card->max_receive + 1); |
1188 | num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; | |
1189 | ||
eac31d58 YH |
1190 | ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL); |
1191 | if (!ptrptr) { | |
1192 | retval = -ENOMEM; | |
111534cd | 1193 | goto failed; |
eac31d58 YH |
1194 | } |
1195 | dev->broadcast_rcv_buffer_ptrs = ptrptr; | |
1196 | ||
f2090594 YH |
1197 | context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE, |
1198 | IEEE1394_BROADCAST_CHANNEL, | |
1199 | dev->card->link_speed, 8, | |
1200 | fwnet_receive_broadcast, dev); | |
1201 | if (IS_ERR(context)) { | |
1202 | retval = PTR_ERR(context); | |
111534cd | 1203 | goto failed; |
f2090594 | 1204 | } |
f91e3bd8 | 1205 | |
f2090594 YH |
1206 | retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card, |
1207 | FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); | |
1208 | if (retval < 0) | |
111534cd YH |
1209 | goto failed; |
1210 | ||
1211 | dev->broadcast_state = FWNET_BROADCAST_STOPPED; | |
f91e3bd8 | 1212 | |
f2090594 YH |
1213 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { |
1214 | void *ptr; | |
1215 | unsigned v; | |
c76acec6 | 1216 | |
f2090594 YH |
1217 | ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); |
1218 | for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) | |
1219 | *ptrptr++ = (void *) ((char *)ptr + v * max_receive); | |
f91e3bd8 | 1220 | } |
f2090594 | 1221 | dev->broadcast_rcv_context = context; |
c76acec6 JF |
1222 | |
1223 | packet.payload_length = max_receive; | |
1224 | packet.interrupt = 1; | |
1225 | packet.skip = 0; | |
1226 | packet.tag = 3; | |
1227 | packet.sy = 0; | |
f91e3bd8 | 1228 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
c76acec6 | 1229 | offset = 0; |
f91e3bd8 SR |
1230 | |
1231 | for (u = 0; u < num_packets; u++) { | |
1232 | retval = fw_iso_context_queue(context, &packet, | |
1233 | &dev->broadcast_rcv_buffer, offset); | |
1234 | if (retval < 0) | |
111534cd | 1235 | goto failed; |
f91e3bd8 | 1236 | |
c76acec6 JF |
1237 | offset += max_receive; |
1238 | } | |
f91e3bd8 SR |
1239 | dev->num_broadcast_rcv_ptrs = num_packets; |
1240 | dev->rcv_buffer_size = max_receive; | |
1241 | dev->broadcast_rcv_next_ptr = 0U; | |
1242 | retval = fw_iso_context_start(context, -1, 0, | |
1243 | FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ | |
1244 | if (retval < 0) | |
111534cd | 1245 | goto failed; |
f91e3bd8 SR |
1246 | |
1247 | /* FIXME: adjust it according to the min. speed of all known peers? */ | |
1248 | dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 | |
1249 | - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; | |
1250 | dev->broadcast_state = FWNET_BROADCAST_RUNNING; | |
1251 | ||
c76acec6 JF |
1252 | return 0; |
1253 | ||
111534cd YH |
1254 | failed: |
1255 | __fwnet_broadcast_stop(dev); | |
c76acec6 JF |
1256 | return retval; |
1257 | } | |
1258 | ||
c1671470 SR |
1259 | static void set_carrier_state(struct fwnet_device *dev) |
1260 | { | |
1261 | if (dev->peer_count > 1) | |
1262 | netif_carrier_on(dev->netdev); | |
1263 | else | |
1264 | netif_carrier_off(dev->netdev); | |
1265 | } | |
1266 | ||
f91e3bd8 SR |
1267 | /* ifup */ |
1268 | static int fwnet_open(struct net_device *net) | |
1269 | { | |
1270 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1271 | int ret; |
1272 | ||
2fbd8dfe YH |
1273 | ret = fwnet_broadcast_start(dev); |
1274 | if (ret) | |
382c4b40 | 1275 | return ret; |
2fbd8dfe | 1276 | |
f91e3bd8 SR |
1277 | netif_start_queue(net); |
1278 | ||
c1671470 SR |
1279 | spin_lock_irq(&dev->lock); |
1280 | set_carrier_state(dev); | |
1281 | spin_unlock_irq(&dev->lock); | |
1282 | ||
c76acec6 JF |
1283 | return 0; |
1284 | } | |
1285 | ||
f91e3bd8 SR |
1286 | /* ifdown */ |
1287 | static int fwnet_stop(struct net_device *net) | |
c76acec6 | 1288 | { |
8559e7f0 YH |
1289 | struct fwnet_device *dev = netdev_priv(net); |
1290 | ||
f91e3bd8 | 1291 | netif_stop_queue(net); |
8559e7f0 | 1292 | fwnet_broadcast_stop(dev); |
c76acec6 | 1293 | |
c76acec6 JF |
1294 | return 0; |
1295 | } | |
1296 | ||
424efe9c | 1297 | static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) |
c76acec6 | 1298 | { |
f91e3bd8 SR |
1299 | struct fwnet_header hdr_buf; |
1300 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1301 | __be16 proto; |
1302 | u16 dest_node; | |
c76acec6 JF |
1303 | unsigned max_payload; |
1304 | u16 dg_size; | |
1305 | u16 *datagram_label_ptr; | |
f91e3bd8 | 1306 | struct fwnet_packet_task *ptask; |
5a124d38 SR |
1307 | struct fwnet_peer *peer; |
1308 | unsigned long flags; | |
c76acec6 | 1309 | |
b2268830 SR |
1310 | spin_lock_irqsave(&dev->lock, flags); |
1311 | ||
1312 | /* Can this happen? */ | |
1313 | if (netif_queue_stopped(dev->netdev)) { | |
1314 | spin_unlock_irqrestore(&dev->lock, flags); | |
1315 | ||
1316 | return NETDEV_TX_BUSY; | |
1317 | } | |
1318 | ||
f91e3bd8 | 1319 | ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); |
c76acec6 JF |
1320 | if (ptask == NULL) |
1321 | goto fail; | |
1322 | ||
1323 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1324 | if (!skb) | |
1325 | goto fail; | |
1326 | ||
1327 | /* | |
f91e3bd8 | 1328 | * Make a copy of the driver-specific header. |
c76acec6 JF |
1329 | * We might need to rebuild the header on tx failure. |
1330 | */ | |
1331 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
c76acec6 | 1332 | proto = hdr_buf.h_proto; |
18406d7e YH |
1333 | |
1334 | switch (proto) { | |
1335 | case htons(ETH_P_ARP): | |
1336 | case htons(ETH_P_IP): | |
1337 | break; | |
1338 | default: | |
1339 | goto fail; | |
1340 | } | |
1341 | ||
1342 | skb_pull(skb, sizeof(hdr_buf)); | |
c76acec6 JF |
1343 | dg_size = skb->len; |
1344 | ||
1345 | /* | |
1346 | * Set the transmission type for the packet. ARP packets and IP | |
1347 | * broadcast packets are sent via GASP. | |
1348 | */ | |
021b97e4 | 1349 | if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) { |
5a124d38 | 1350 | max_payload = dev->broadcast_xmt_max_payload; |
f91e3bd8 SR |
1351 | datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; |
1352 | ||
5a124d38 SR |
1353 | ptask->fifo_addr = FWNET_NO_FIFO_ADDR; |
1354 | ptask->generation = 0; | |
1355 | ptask->dest_node = IEEE1394_ALL_NODES; | |
1356 | ptask->speed = SCODE_100; | |
c76acec6 | 1357 | } else { |
f91e3bd8 | 1358 | __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); |
c76acec6 JF |
1359 | u8 generation; |
1360 | ||
f91e3bd8 | 1361 | peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); |
5a124d38 | 1362 | if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR) |
b2268830 | 1363 | goto fail; |
c76acec6 | 1364 | |
5a124d38 SR |
1365 | generation = peer->generation; |
1366 | dest_node = peer->node_id; | |
1367 | max_payload = peer->max_payload; | |
f91e3bd8 | 1368 | datagram_label_ptr = &peer->datagram_label; |
c76acec6 | 1369 | |
5a124d38 SR |
1370 | ptask->fifo_addr = peer->fifo; |
1371 | ptask->generation = generation; | |
1372 | ptask->dest_node = dest_node; | |
1373 | ptask->speed = peer->speed; | |
c76acec6 JF |
1374 | } |
1375 | ||
1376 | /* If this is an ARP packet, convert it */ | |
1377 | if (proto == htons(ETH_P_ARP)) { | |
c76acec6 JF |
1378 | struct arphdr *arp = (struct arphdr *)skb->data; |
1379 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
f91e3bd8 SR |
1380 | struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data; |
1381 | __be32 ipaddr; | |
1382 | ||
1383 | ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN)); | |
1384 | ||
1385 | arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN; | |
1386 | arp1394->max_rec = dev->card->max_receive; | |
1387 | arp1394->sspd = dev->card->link_speed; | |
1388 | ||
1389 | put_unaligned_be16(dev->local_fifo >> 32, | |
1390 | &arp1394->fifo_hi); | |
1391 | put_unaligned_be32(dev->local_fifo & 0xffffffff, | |
1392 | &arp1394->fifo_lo); | |
1393 | put_unaligned(ipaddr, &arp1394->sip); | |
c76acec6 | 1394 | } |
c76acec6 JF |
1395 | |
1396 | ptask->hdr.w0 = 0; | |
1397 | ptask->hdr.w1 = 0; | |
1398 | ptask->skb = skb; | |
f91e3bd8 SR |
1399 | ptask->dev = dev; |
1400 | ||
c76acec6 | 1401 | /* Does it all fit in one packet? */ |
f91e3bd8 SR |
1402 | if (dg_size <= max_payload) { |
1403 | fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); | |
c76acec6 | 1404 | ptask->outstanding_pkts = 1; |
f91e3bd8 | 1405 | max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 JF |
1406 | } else { |
1407 | u16 datagram_label; | |
1408 | ||
f91e3bd8 | 1409 | max_payload -= RFC2374_FRAG_OVERHEAD; |
c76acec6 | 1410 | datagram_label = (*datagram_label_ptr)++; |
f91e3bd8 SR |
1411 | fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, |
1412 | datagram_label); | |
c76acec6 | 1413 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
f91e3bd8 | 1414 | max_payload += RFC2374_FRAG_HDR_SIZE; |
c76acec6 | 1415 | } |
5a124d38 | 1416 | |
b2268830 SR |
1417 | if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS) |
1418 | netif_stop_queue(dev->netdev); | |
48553011 | 1419 | |
5a124d38 SR |
1420 | spin_unlock_irqrestore(&dev->lock, flags); |
1421 | ||
c76acec6 | 1422 | ptask->max_payload = max_payload; |
48553011 | 1423 | ptask->enqueued = 0; |
110f82d7 | 1424 | |
f91e3bd8 SR |
1425 | fwnet_send_packet(ptask); |
1426 | ||
c76acec6 JF |
1427 | return NETDEV_TX_OK; |
1428 | ||
1429 | fail: | |
b2268830 SR |
1430 | spin_unlock_irqrestore(&dev->lock, flags); |
1431 | ||
c76acec6 | 1432 | if (ptask) |
f91e3bd8 | 1433 | kmem_cache_free(fwnet_packet_task_cache, ptask); |
c76acec6 JF |
1434 | |
1435 | if (skb != NULL) | |
1436 | dev_kfree_skb(skb); | |
1437 | ||
f91e3bd8 SR |
1438 | net->stats.tx_dropped++; |
1439 | net->stats.tx_errors++; | |
c76acec6 JF |
1440 | |
1441 | /* | |
1442 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1443 | * causes serious problems" here, allegedly. Before that patch, | |
1444 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1445 | * Perhaps more needs to be done? Stop the queue in serious | |
1446 | * conditions and restart it elsewhere? | |
1447 | */ | |
1448 | return NETDEV_TX_OK; | |
1449 | } | |
1450 | ||
f91e3bd8 SR |
1451 | static int fwnet_change_mtu(struct net_device *net, int new_mtu) |
1452 | { | |
c76acec6 JF |
1453 | if (new_mtu < 68) |
1454 | return -EINVAL; | |
1455 | ||
f91e3bd8 | 1456 | net->mtu = new_mtu; |
c76acec6 JF |
1457 | return 0; |
1458 | } | |
1459 | ||
18bb36f9 ML |
1460 | static const struct ethtool_ops fwnet_ethtool_ops = { |
1461 | .get_link = ethtool_op_get_link, | |
1462 | }; | |
1463 | ||
f91e3bd8 SR |
1464 | static const struct net_device_ops fwnet_netdev_ops = { |
1465 | .ndo_open = fwnet_open, | |
1466 | .ndo_stop = fwnet_stop, | |
1467 | .ndo_start_xmit = fwnet_tx, | |
f91e3bd8 | 1468 | .ndo_change_mtu = fwnet_change_mtu, |
c76acec6 JF |
1469 | }; |
1470 | ||
f91e3bd8 SR |
1471 | static void fwnet_init_dev(struct net_device *net) |
1472 | { | |
1473 | net->header_ops = &fwnet_header_ops; | |
1474 | net->netdev_ops = &fwnet_netdev_ops; | |
1337f853 | 1475 | net->watchdog_timeo = 2 * HZ; |
f91e3bd8 SR |
1476 | net->flags = IFF_BROADCAST | IFF_MULTICAST; |
1477 | net->features = NETIF_F_HIGHDMA; | |
1478 | net->addr_len = FWNET_ALEN; | |
1479 | net->hard_header_len = FWNET_HLEN; | |
1480 | net->type = ARPHRD_IEEE1394; | |
b2268830 | 1481 | net->tx_queue_len = FWNET_TX_QUEUE_LEN; |
18bb36f9 | 1482 | net->ethtool_ops = &fwnet_ethtool_ops; |
c76acec6 JF |
1483 | } |
1484 | ||
5a124d38 SR |
1485 | /* caller must hold fwnet_device_mutex */ |
1486 | static struct fwnet_device *fwnet_dev_find(struct fw_card *card) | |
1487 | { | |
1488 | struct fwnet_device *dev; | |
1489 | ||
1490 | list_for_each_entry(dev, &fwnet_device_list, dev_link) | |
1491 | if (dev->card == card) | |
1492 | return dev; | |
1493 | ||
1494 | return NULL; | |
1495 | } | |
1496 | ||
1497 | static int fwnet_add_peer(struct fwnet_device *dev, | |
1498 | struct fw_unit *unit, struct fw_device *device) | |
1499 | { | |
1500 | struct fwnet_peer *peer; | |
1501 | ||
1502 | peer = kmalloc(sizeof(*peer), GFP_KERNEL); | |
1503 | if (!peer) | |
1504 | return -ENOMEM; | |
1505 | ||
b01b4bab SR |
1506 | dev_set_drvdata(&unit->device, peer); |
1507 | ||
5a124d38 SR |
1508 | peer->dev = dev; |
1509 | peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; | |
1510 | peer->fifo = FWNET_NO_FIFO_ADDR; | |
74a14504 | 1511 | peer->ip = 0; |
5a124d38 SR |
1512 | INIT_LIST_HEAD(&peer->pd_list); |
1513 | peer->pdg_size = 0; | |
1514 | peer->datagram_label = 0; | |
1515 | peer->speed = device->max_speed; | |
1516 | peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); | |
1517 | ||
1518 | peer->generation = device->generation; | |
1519 | smp_rmb(); | |
1520 | peer->node_id = device->node_id; | |
1521 | ||
1522 | spin_lock_irq(&dev->lock); | |
1523 | list_add_tail(&peer->peer_link, &dev->peer_list); | |
18bb36f9 | 1524 | dev->peer_count++; |
c1671470 | 1525 | set_carrier_state(dev); |
5a124d38 SR |
1526 | spin_unlock_irq(&dev->lock); |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
f91e3bd8 SR |
1531 | static int fwnet_probe(struct device *_dev) |
1532 | { | |
1533 | struct fw_unit *unit = fw_unit(_dev); | |
1534 | struct fw_device *device = fw_parent_device(unit); | |
1535 | struct fw_card *card = device->card; | |
1536 | struct net_device *net; | |
b01b4bab | 1537 | bool allocated_netdev = false; |
f91e3bd8 | 1538 | struct fwnet_device *dev; |
c76acec6 | 1539 | unsigned max_mtu; |
5a124d38 | 1540 | int ret; |
c76acec6 | 1541 | |
5a124d38 | 1542 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1543 | |
5a124d38 SR |
1544 | dev = fwnet_dev_find(card); |
1545 | if (dev) { | |
5a124d38 SR |
1546 | net = dev->netdev; |
1547 | goto have_dev; | |
c76acec6 | 1548 | } |
5a124d38 | 1549 | |
f91e3bd8 SR |
1550 | net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev); |
1551 | if (net == NULL) { | |
5a124d38 | 1552 | ret = -ENOMEM; |
c76acec6 JF |
1553 | goto out; |
1554 | } | |
1555 | ||
b01b4bab | 1556 | allocated_netdev = true; |
f91e3bd8 SR |
1557 | SET_NETDEV_DEV(net, card->device); |
1558 | dev = netdev_priv(net); | |
c76acec6 | 1559 | |
f91e3bd8 SR |
1560 | spin_lock_init(&dev->lock); |
1561 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1562 | dev->broadcast_rcv_context = NULL; | |
1563 | dev->broadcast_xmt_max_payload = 0; | |
1564 | dev->broadcast_xmt_datagramlabel = 0; | |
f91e3bd8 | 1565 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
48553011 | 1566 | dev->queued_datagrams = 0; |
5a124d38 | 1567 | INIT_LIST_HEAD(&dev->peer_list); |
f91e3bd8 | 1568 | dev->card = card; |
5a124d38 | 1569 | dev->netdev = net; |
c76acec6 | 1570 | |
382c4b40 YH |
1571 | ret = fwnet_fifo_start(dev); |
1572 | if (ret < 0) | |
1573 | goto out; | |
1574 | dev->local_fifo = dev->handler.offset; | |
1575 | ||
c76acec6 JF |
1576 | /* |
1577 | * Use the RFC 2734 default 1500 octets or the maximum payload | |
1578 | * as initial MTU | |
1579 | */ | |
1580 | max_mtu = (1 << (card->max_receive + 1)) | |
f91e3bd8 SR |
1581 | - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; |
1582 | net->mtu = min(1500U, max_mtu); | |
c76acec6 JF |
1583 | |
1584 | /* Set our hardware address while we're at it */ | |
f91e3bd8 SR |
1585 | put_unaligned_be64(card->guid, net->dev_addr); |
1586 | put_unaligned_be64(~0ULL, net->broadcast); | |
5a124d38 | 1587 | ret = register_netdev(net); |
8408dc1c | 1588 | if (ret) |
c76acec6 | 1589 | goto out; |
c76acec6 | 1590 | |
5a124d38 | 1591 | list_add_tail(&dev->dev_link, &fwnet_device_list); |
8408dc1c SR |
1592 | dev_notice(&net->dev, "IPv4 over IEEE 1394 on card %s\n", |
1593 | dev_name(card->device)); | |
5a124d38 SR |
1594 | have_dev: |
1595 | ret = fwnet_add_peer(dev, unit, device); | |
b01b4bab | 1596 | if (ret && allocated_netdev) { |
5a124d38 SR |
1597 | unregister_netdev(net); |
1598 | list_del(&dev->dev_link); | |
c76acec6 | 1599 | out: |
382c4b40 | 1600 | fwnet_fifo_stop(dev); |
f91e3bd8 | 1601 | free_netdev(net); |
382c4b40 | 1602 | } |
f91e3bd8 | 1603 | |
5a124d38 SR |
1604 | mutex_unlock(&fwnet_device_mutex); |
1605 | ||
1606 | return ret; | |
1607 | } | |
1608 | ||
c1671470 | 1609 | static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev) |
5a124d38 SR |
1610 | { |
1611 | struct fwnet_partial_datagram *pd, *pd_next; | |
1612 | ||
c1671470 | 1613 | spin_lock_irq(&dev->lock); |
5a124d38 | 1614 | list_del(&peer->peer_link); |
c1671470 SR |
1615 | dev->peer_count--; |
1616 | set_carrier_state(dev); | |
1617 | spin_unlock_irq(&dev->lock); | |
5a124d38 SR |
1618 | |
1619 | list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) | |
1620 | fwnet_pd_delete(pd); | |
1621 | ||
1622 | kfree(peer); | |
c76acec6 JF |
1623 | } |
1624 | ||
f91e3bd8 SR |
1625 | static int fwnet_remove(struct device *_dev) |
1626 | { | |
b01b4bab | 1627 | struct fwnet_peer *peer = dev_get_drvdata(_dev); |
5a124d38 | 1628 | struct fwnet_device *dev = peer->dev; |
f91e3bd8 | 1629 | struct net_device *net; |
48553011 | 1630 | int i; |
f91e3bd8 | 1631 | |
5a124d38 | 1632 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1633 | |
74a14504 ML |
1634 | net = dev->netdev; |
1635 | if (net && peer->ip) | |
1636 | arp_invalidate(net, peer->ip); | |
1637 | ||
c1671470 | 1638 | fwnet_remove_peer(peer, dev); |
18bb36f9 | 1639 | |
5a124d38 | 1640 | if (list_empty(&dev->peer_list)) { |
f91e3bd8 SR |
1641 | unregister_netdev(net); |
1642 | ||
382c4b40 YH |
1643 | fwnet_fifo_stop(dev); |
1644 | ||
48553011 SR |
1645 | for (i = 0; dev->queued_datagrams && i < 5; i++) |
1646 | ssleep(1); | |
1647 | WARN_ON(dev->queued_datagrams); | |
b01b4bab SR |
1648 | list_del(&dev->dev_link); |
1649 | ||
f91e3bd8 | 1650 | free_netdev(net); |
c76acec6 | 1651 | } |
f91e3bd8 | 1652 | |
5a124d38 SR |
1653 | mutex_unlock(&fwnet_device_mutex); |
1654 | ||
c76acec6 JF |
1655 | return 0; |
1656 | } | |
1657 | ||
f91e3bd8 SR |
1658 | /* |
1659 | * FIXME abort partially sent fragmented datagrams, | |
1660 | * discard partially received fragmented datagrams | |
1661 | */ | |
1662 | static void fwnet_update(struct fw_unit *unit) | |
1663 | { | |
1664 | struct fw_device *device = fw_parent_device(unit); | |
b01b4bab | 1665 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); |
5a124d38 | 1666 | int generation; |
c76acec6 | 1667 | |
5a124d38 SR |
1668 | generation = device->generation; |
1669 | ||
1670 | spin_lock_irq(&peer->dev->lock); | |
1671 | peer->node_id = device->node_id; | |
1672 | peer->generation = generation; | |
1673 | spin_unlock_irq(&peer->dev->lock); | |
c76acec6 JF |
1674 | } |
1675 | ||
f91e3bd8 SR |
1676 | static const struct ieee1394_device_id fwnet_id_table[] = { |
1677 | { | |
1678 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1679 | IEEE1394_MATCH_VERSION, | |
1680 | .specifier_id = IANA_SPECIFIER_ID, | |
1681 | .version = RFC2734_SW_VERSION, | |
1682 | }, | |
1683 | { } | |
1684 | }; | |
1685 | ||
1686 | static struct fw_driver fwnet_driver = { | |
c76acec6 | 1687 | .driver = { |
f91e3bd8 | 1688 | .owner = THIS_MODULE, |
59759ff6 | 1689 | .name = KBUILD_MODNAME, |
f91e3bd8 SR |
1690 | .bus = &fw_bus_type, |
1691 | .probe = fwnet_probe, | |
1692 | .remove = fwnet_remove, | |
c76acec6 | 1693 | }, |
f91e3bd8 SR |
1694 | .update = fwnet_update, |
1695 | .id_table = fwnet_id_table, | |
1696 | }; | |
1697 | ||
1698 | static const u32 rfc2374_unit_directory_data[] = { | |
1699 | 0x00040000, /* directory_length */ | |
1700 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1701 | 0x81000003, /* textual descriptor offset */ | |
1702 | 0x13000001, /* unit_sw_version: RFC 2734 */ | |
1703 | 0x81000005, /* textual descriptor offset */ | |
1704 | 0x00030000, /* descriptor_length */ | |
1705 | 0x00000000, /* text */ | |
1706 | 0x00000000, /* minimal ASCII, en */ | |
1707 | 0x49414e41, /* I A N A */ | |
1708 | 0x00030000, /* descriptor_length */ | |
1709 | 0x00000000, /* text */ | |
1710 | 0x00000000, /* minimal ASCII, en */ | |
1711 | 0x49507634, /* I P v 4 */ | |
1712 | }; | |
1713 | ||
1714 | static struct fw_descriptor rfc2374_unit_directory = { | |
1715 | .length = ARRAY_SIZE(rfc2374_unit_directory_data), | |
1716 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1717 | .data = rfc2374_unit_directory_data | |
c76acec6 JF |
1718 | }; |
1719 | ||
f91e3bd8 SR |
1720 | static int __init fwnet_init(void) |
1721 | { | |
1722 | int err; | |
1723 | ||
1724 | err = fw_core_add_descriptor(&rfc2374_unit_directory); | |
1725 | if (err) | |
1726 | return err; | |
c76acec6 | 1727 | |
f91e3bd8 SR |
1728 | fwnet_packet_task_cache = kmem_cache_create("packet_task", |
1729 | sizeof(struct fwnet_packet_task), 0, 0, NULL); | |
1730 | if (!fwnet_packet_task_cache) { | |
1731 | err = -ENOMEM; | |
1732 | goto out; | |
1733 | } | |
1734 | ||
1735 | err = driver_register(&fwnet_driver.driver); | |
1736 | if (!err) | |
1737 | return 0; | |
1738 | ||
1739 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1740 | out: | |
1741 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
1742 | ||
1743 | return err; | |
c76acec6 | 1744 | } |
f91e3bd8 | 1745 | module_init(fwnet_init); |
c76acec6 | 1746 | |
f91e3bd8 SR |
1747 | static void __exit fwnet_cleanup(void) |
1748 | { | |
1749 | driver_unregister(&fwnet_driver.driver); | |
1750 | kmem_cache_destroy(fwnet_packet_task_cache); | |
1751 | fw_core_remove_descriptor(&rfc2374_unit_directory); | |
c76acec6 | 1752 | } |
f91e3bd8 | 1753 | module_exit(fwnet_cleanup); |
c76acec6 | 1754 | |
f91e3bd8 SR |
1755 | MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); |
1756 | MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734"); | |
1757 | MODULE_LICENSE("GPL"); | |
1758 | MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); |