Commit | Line | Data |
---|---|---|
c76acec6 JF |
1 | /* |
2 | * IPv4 over IEEE 1394, per RFC 2734 | |
cb6bf355 | 3 | * IPv6 over IEEE 1394, per RFC 3146 |
c76acec6 JF |
4 | * |
5 | * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com> | |
6 | * | |
7 | * based on eth1394 by Ben Collins et al | |
8 | */ | |
9 | ||
f91e3bd8 | 10 | #include <linux/bug.h> |
bf337b15 | 11 | #include <linux/compiler.h> |
48553011 | 12 | #include <linux/delay.h> |
c76acec6 | 13 | #include <linux/device.h> |
c1671470 | 14 | #include <linux/ethtool.h> |
c76acec6 JF |
15 | #include <linux/firewire.h> |
16 | #include <linux/firewire-constants.h> | |
17 | #include <linux/highmem.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/ip.h> | |
f91e3bd8 | 20 | #include <linux/jiffies.h> |
c76acec6 JF |
21 | #include <linux/mod_devicetable.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/moduleparam.h> | |
5a124d38 | 24 | #include <linux/mutex.h> |
c76acec6 JF |
25 | #include <linux/netdevice.h> |
26 | #include <linux/skbuff.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
5a124d38 | 28 | #include <linux/spinlock.h> |
c76acec6 JF |
29 | |
30 | #include <asm/unaligned.h> | |
31 | #include <net/arp.h> | |
6752c8db | 32 | #include <net/firewire.h> |
c76acec6 | 33 | |
b2268830 SR |
34 | /* rx limits */ |
35 | #define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */ | |
36 | #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2) | |
37 | ||
38 | /* tx limits */ | |
39 | #define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */ | |
40 | #define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */ | |
41 | #define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */ | |
c76acec6 | 42 | |
f91e3bd8 SR |
43 | #define IEEE1394_BROADCAST_CHANNEL 31 |
44 | #define IEEE1394_ALL_NODES (0xffc0 | 0x003f) | |
45 | #define IEEE1394_MAX_PAYLOAD_S100 512 | |
46 | #define FWNET_NO_FIFO_ADDR (~0ULL) | |
c76acec6 | 47 | |
f91e3bd8 SR |
48 | #define IANA_SPECIFIER_ID 0x00005eU |
49 | #define RFC2734_SW_VERSION 0x000001U | |
cb6bf355 | 50 | #define RFC3146_SW_VERSION 0x000002U |
c76acec6 | 51 | |
f91e3bd8 | 52 | #define IEEE1394_GASP_HDR_SIZE 8 |
c76acec6 | 53 | |
f91e3bd8 SR |
54 | #define RFC2374_UNFRAG_HDR_SIZE 4 |
55 | #define RFC2374_FRAG_HDR_SIZE 8 | |
56 | #define RFC2374_FRAG_OVERHEAD 4 | |
c76acec6 | 57 | |
f91e3bd8 SR |
58 | #define RFC2374_HDR_UNFRAG 0 /* unfragmented */ |
59 | #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */ | |
60 | #define RFC2374_HDR_LASTFRAG 2 /* last fragment */ | |
61 | #define RFC2374_HDR_INTFRAG 3 /* interior fragment */ | |
c76acec6 | 62 | |
021b97e4 YH |
63 | static bool fwnet_hwaddr_is_multicast(u8 *ha) |
64 | { | |
65 | return !!(*ha & 1); | |
66 | } | |
67 | ||
f91e3bd8 SR |
68 | /* IPv4 and IPv6 encapsulation header */ |
69 | struct rfc2734_header { | |
c76acec6 JF |
70 | u32 w0; |
71 | u32 w1; | |
72 | }; | |
73 | ||
f91e3bd8 SR |
74 | #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) |
75 | #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) | |
76 | #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16) | |
77 | #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) | |
78 | #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) | |
c76acec6 | 79 | |
f91e3bd8 SR |
80 | #define fwnet_set_hdr_lf(lf) ((lf) << 30) |
81 | #define fwnet_set_hdr_ether_type(et) (et) | |
82 | #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16) | |
83 | #define fwnet_set_hdr_fg_off(fgo) (fgo) | |
c76acec6 | 84 | |
f91e3bd8 | 85 | #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) |
c76acec6 | 86 | |
f91e3bd8 SR |
87 | static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, |
88 | unsigned ether_type) | |
89 | { | |
90 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) | |
91 | | fwnet_set_hdr_ether_type(ether_type); | |
92 | } | |
c76acec6 | 93 | |
f91e3bd8 SR |
94 | static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, |
95 | unsigned ether_type, unsigned dg_size, unsigned dgl) | |
96 | { | |
97 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) | |
98 | | fwnet_set_hdr_dg_size(dg_size) | |
99 | | fwnet_set_hdr_ether_type(ether_type); | |
100 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
101 | } | |
c76acec6 | 102 | |
f91e3bd8 SR |
103 | static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, |
104 | unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) | |
105 | { | |
106 | hdr->w0 = fwnet_set_hdr_lf(lf) | |
107 | | fwnet_set_hdr_dg_size(dg_size) | |
108 | | fwnet_set_hdr_fg_off(fg_off); | |
109 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
110 | } | |
c76acec6 JF |
111 | |
112 | /* This list keeps track of what parts of the datagram have been filled in */ | |
f91e3bd8 SR |
113 | struct fwnet_fragment_info { |
114 | struct list_head fi_link; | |
c76acec6 JF |
115 | u16 offset; |
116 | u16 len; | |
117 | }; | |
118 | ||
f91e3bd8 SR |
119 | struct fwnet_partial_datagram { |
120 | struct list_head pd_link; | |
121 | struct list_head fi_list; | |
c76acec6 JF |
122 | struct sk_buff *skb; |
123 | /* FIXME Why not use skb->data? */ | |
124 | char *pbuf; | |
125 | u16 datagram_label; | |
126 | u16 ether_type; | |
127 | u16 datagram_size; | |
128 | }; | |
129 | ||
5a124d38 SR |
130 | static DEFINE_MUTEX(fwnet_device_mutex); |
131 | static LIST_HEAD(fwnet_device_list); | |
c76acec6 | 132 | |
f91e3bd8 | 133 | struct fwnet_device { |
5a124d38 | 134 | struct list_head dev_link; |
c76acec6 | 135 | spinlock_t lock; |
f91e3bd8 SR |
136 | enum { |
137 | FWNET_BROADCAST_ERROR, | |
138 | FWNET_BROADCAST_RUNNING, | |
139 | FWNET_BROADCAST_STOPPED, | |
140 | } broadcast_state; | |
c76acec6 JF |
141 | struct fw_iso_context *broadcast_rcv_context; |
142 | struct fw_iso_buffer broadcast_rcv_buffer; | |
143 | void **broadcast_rcv_buffer_ptrs; | |
144 | unsigned broadcast_rcv_next_ptr; | |
145 | unsigned num_broadcast_rcv_ptrs; | |
146 | unsigned rcv_buffer_size; | |
147 | /* | |
148 | * This value is the maximum unfragmented datagram size that can be | |
149 | * sent by the hardware. It already has the GASP overhead and the | |
150 | * unfragmented datagram header overhead calculated into it. | |
151 | */ | |
152 | unsigned broadcast_xmt_max_payload; | |
153 | u16 broadcast_xmt_datagramlabel; | |
154 | ||
155 | /* | |
f91e3bd8 | 156 | * The CSR address that remote nodes must send datagrams to for us to |
c76acec6 JF |
157 | * receive them. |
158 | */ | |
159 | struct fw_address_handler handler; | |
160 | u64 local_fifo; | |
161 | ||
48553011 SR |
162 | /* Number of tx datagrams that have been queued but not yet acked */ |
163 | int queued_datagrams; | |
c76acec6 | 164 | |
c1671470 | 165 | int peer_count; |
5a124d38 | 166 | struct list_head peer_list; |
c76acec6 | 167 | struct fw_card *card; |
5a124d38 SR |
168 | struct net_device *netdev; |
169 | }; | |
170 | ||
171 | struct fwnet_peer { | |
172 | struct list_head peer_link; | |
173 | struct fwnet_device *dev; | |
174 | u64 guid; | |
5a124d38 SR |
175 | |
176 | /* guarded by dev->lock */ | |
177 | struct list_head pd_list; /* received partial datagrams */ | |
178 | unsigned pdg_size; /* pd_list size */ | |
179 | ||
180 | u16 datagram_label; /* outgoing datagram label */ | |
48553011 | 181 | u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ |
5a124d38 SR |
182 | int node_id; |
183 | int generation; | |
184 | unsigned speed; | |
c76acec6 JF |
185 | }; |
186 | ||
187 | /* This is our task struct. It's used for the packet complete callback. */ | |
f91e3bd8 | 188 | struct fwnet_packet_task { |
c76acec6 | 189 | struct fw_transaction transaction; |
f91e3bd8 | 190 | struct rfc2734_header hdr; |
c76acec6 | 191 | struct sk_buff *skb; |
f91e3bd8 SR |
192 | struct fwnet_device *dev; |
193 | ||
c76acec6 | 194 | int outstanding_pkts; |
c76acec6 JF |
195 | u64 fifo_addr; |
196 | u16 dest_node; | |
48553011 | 197 | u16 max_payload; |
c76acec6 JF |
198 | u8 generation; |
199 | u8 speed; | |
48553011 | 200 | u8 enqueued; |
c76acec6 JF |
201 | }; |
202 | ||
6752c8db YH |
203 | /* |
204 | * Get fifo address embedded in hwaddr | |
205 | */ | |
206 | static __u64 fwnet_hwaddr_fifo(union fwnet_hwaddr *ha) | |
207 | { | |
208 | return (u64)get_unaligned_be16(&ha->uc.fifo_hi) << 32 | |
209 | | get_unaligned_be32(&ha->uc.fifo_lo); | |
210 | } | |
211 | ||
f91e3bd8 SR |
212 | /* |
213 | * saddr == NULL means use device source address. | |
214 | * daddr == NULL means leave destination address (eg unresolved arp). | |
215 | */ | |
216 | static int fwnet_header_create(struct sk_buff *skb, struct net_device *net, | |
217 | unsigned short type, const void *daddr, | |
218 | const void *saddr, unsigned len) | |
219 | { | |
220 | struct fwnet_header *h; | |
c76acec6 | 221 | |
f91e3bd8 SR |
222 | h = (struct fwnet_header *)skb_push(skb, sizeof(*h)); |
223 | put_unaligned_be16(type, &h->h_proto); | |
c76acec6 | 224 | |
f91e3bd8 SR |
225 | if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
226 | memset(h->h_dest, 0, net->addr_len); | |
c76acec6 | 227 | |
f91e3bd8 | 228 | return net->hard_header_len; |
c76acec6 JF |
229 | } |
230 | ||
231 | if (daddr) { | |
f91e3bd8 SR |
232 | memcpy(h->h_dest, daddr, net->addr_len); |
233 | ||
234 | return net->hard_header_len; | |
c76acec6 JF |
235 | } |
236 | ||
f91e3bd8 | 237 | return -net->hard_header_len; |
c76acec6 JF |
238 | } |
239 | ||
f91e3bd8 | 240 | static int fwnet_header_rebuild(struct sk_buff *skb) |
c76acec6 | 241 | { |
f91e3bd8 | 242 | struct fwnet_header *h = (struct fwnet_header *)skb->data; |
c76acec6 | 243 | |
f91e3bd8 SR |
244 | if (get_unaligned_be16(&h->h_proto) == ETH_P_IP) |
245 | return arp_find((unsigned char *)&h->h_dest, skb); | |
c76acec6 | 246 | |
8408dc1c SR |
247 | dev_notice(&skb->dev->dev, "unable to resolve type %04x addresses\n", |
248 | be16_to_cpu(h->h_proto)); | |
c76acec6 JF |
249 | return 0; |
250 | } | |
251 | ||
f91e3bd8 | 252 | static int fwnet_header_cache(const struct neighbour *neigh, |
e69dd336 | 253 | struct hh_cache *hh, __be16 type) |
f91e3bd8 SR |
254 | { |
255 | struct net_device *net; | |
256 | struct fwnet_header *h; | |
c76acec6 | 257 | |
e69dd336 | 258 | if (type == cpu_to_be16(ETH_P_802_3)) |
c76acec6 | 259 | return -1; |
f91e3bd8 | 260 | net = neigh->dev; |
82586340 | 261 | h = (struct fwnet_header *)((u8 *)hh->hh_data + HH_DATA_OFF(sizeof(*h))); |
e69dd336 | 262 | h->h_proto = type; |
f91e3bd8 SR |
263 | memcpy(h->h_dest, neigh->ha, net->addr_len); |
264 | hh->hh_len = FWNET_HLEN; | |
c76acec6 | 265 | |
c76acec6 JF |
266 | return 0; |
267 | } | |
268 | ||
269 | /* Called by Address Resolution module to notify changes in address. */ | |
f91e3bd8 SR |
270 | static void fwnet_header_cache_update(struct hh_cache *hh, |
271 | const struct net_device *net, const unsigned char *haddr) | |
272 | { | |
82586340 | 273 | memcpy((u8 *)hh->hh_data + HH_DATA_OFF(FWNET_HLEN), haddr, net->addr_len); |
c76acec6 JF |
274 | } |
275 | ||
f91e3bd8 SR |
276 | static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
277 | { | |
278 | memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN); | |
279 | ||
280 | return FWNET_ALEN; | |
c76acec6 JF |
281 | } |
282 | ||
f91e3bd8 SR |
283 | static const struct header_ops fwnet_header_ops = { |
284 | .create = fwnet_header_create, | |
285 | .rebuild = fwnet_header_rebuild, | |
286 | .cache = fwnet_header_cache, | |
287 | .cache_update = fwnet_header_cache_update, | |
288 | .parse = fwnet_header_parse, | |
c76acec6 JF |
289 | }; |
290 | ||
c76acec6 | 291 | /* FIXME: is this correct for all cases? */ |
f91e3bd8 SR |
292 | static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd, |
293 | unsigned offset, unsigned len) | |
c76acec6 | 294 | { |
f91e3bd8 | 295 | struct fwnet_fragment_info *fi; |
c76acec6 JF |
296 | unsigned end = offset + len; |
297 | ||
f91e3bd8 SR |
298 | list_for_each_entry(fi, &pd->fi_list, fi_link) |
299 | if (offset < fi->offset + fi->len && end > fi->offset) | |
c76acec6 | 300 | return true; |
f91e3bd8 | 301 | |
c76acec6 JF |
302 | return false; |
303 | } | |
304 | ||
305 | /* Assumes that new fragment does not overlap any existing fragments */ | |
f91e3bd8 SR |
306 | static struct fwnet_fragment_info *fwnet_frag_new( |
307 | struct fwnet_partial_datagram *pd, unsigned offset, unsigned len) | |
308 | { | |
309 | struct fwnet_fragment_info *fi, *fi2, *new; | |
c76acec6 JF |
310 | struct list_head *list; |
311 | ||
f91e3bd8 SR |
312 | list = &pd->fi_list; |
313 | list_for_each_entry(fi, &pd->fi_list, fi_link) { | |
c76acec6 JF |
314 | if (fi->offset + fi->len == offset) { |
315 | /* The new fragment can be tacked on to the end */ | |
316 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
317 | fi2 = list_entry(fi->fi_link.next, |
318 | struct fwnet_fragment_info, fi_link); | |
c76acec6 | 319 | if (fi->offset + fi->len == fi2->offset) { |
c76acec6 JF |
320 | /* glue fragments together */ |
321 | fi->len += len + fi2->len; | |
f91e3bd8 | 322 | list_del(&fi2->fi_link); |
c76acec6 JF |
323 | kfree(fi2); |
324 | } else { | |
c76acec6 JF |
325 | fi->len += len; |
326 | } | |
f91e3bd8 | 327 | |
c76acec6 JF |
328 | return fi; |
329 | } | |
330 | if (offset + len == fi->offset) { | |
331 | /* The new fragment can be tacked on to the beginning */ | |
332 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
333 | fi2 = list_entry(fi->fi_link.prev, |
334 | struct fwnet_fragment_info, fi_link); | |
c76acec6 JF |
335 | if (fi2->offset + fi2->len == fi->offset) { |
336 | /* glue fragments together */ | |
c76acec6 | 337 | fi2->len += fi->len + len; |
f91e3bd8 | 338 | list_del(&fi->fi_link); |
c76acec6 | 339 | kfree(fi); |
f91e3bd8 | 340 | |
c76acec6 JF |
341 | return fi2; |
342 | } | |
c76acec6 JF |
343 | fi->offset = offset; |
344 | fi->len += len; | |
f91e3bd8 | 345 | |
c76acec6 JF |
346 | return fi; |
347 | } | |
348 | if (offset > fi->offset + fi->len) { | |
f91e3bd8 | 349 | list = &fi->fi_link; |
c76acec6 JF |
350 | break; |
351 | } | |
352 | if (offset + len < fi->offset) { | |
f91e3bd8 | 353 | list = fi->fi_link.prev; |
c76acec6 JF |
354 | break; |
355 | } | |
356 | } | |
357 | ||
358 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
cfb0c9d1 | 359 | if (!new) |
c76acec6 | 360 | return NULL; |
c76acec6 JF |
361 | |
362 | new->offset = offset; | |
363 | new->len = len; | |
f91e3bd8 SR |
364 | list_add(&new->fi_link, list); |
365 | ||
c76acec6 JF |
366 | return new; |
367 | } | |
368 | ||
f91e3bd8 SR |
369 | static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net, |
370 | struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size, | |
371 | void *frag_buf, unsigned frag_off, unsigned frag_len) | |
372 | { | |
373 | struct fwnet_partial_datagram *new; | |
374 | struct fwnet_fragment_info *fi; | |
c76acec6 JF |
375 | |
376 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
377 | if (!new) | |
378 | goto fail; | |
f91e3bd8 SR |
379 | |
380 | INIT_LIST_HEAD(&new->fi_list); | |
381 | fi = fwnet_frag_new(new, frag_off, frag_len); | |
382 | if (fi == NULL) | |
c76acec6 | 383 | goto fail_w_new; |
f91e3bd8 | 384 | |
c76acec6 JF |
385 | new->datagram_label = datagram_label; |
386 | new->datagram_size = dg_size; | |
82586340 | 387 | new->skb = dev_alloc_skb(dg_size + LL_RESERVED_SPACE(net)); |
f91e3bd8 | 388 | if (new->skb == NULL) |
c76acec6 | 389 | goto fail_w_fi; |
f91e3bd8 | 390 | |
82586340 | 391 | skb_reserve(new->skb, LL_RESERVED_SPACE(net)); |
c76acec6 JF |
392 | new->pbuf = skb_put(new->skb, dg_size); |
393 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
f91e3bd8 SR |
394 | list_add_tail(&new->pd_link, &peer->pd_list); |
395 | ||
c76acec6 JF |
396 | return new; |
397 | ||
398 | fail_w_fi: | |
399 | kfree(fi); | |
400 | fail_w_new: | |
401 | kfree(new); | |
402 | fail: | |
c76acec6 JF |
403 | return NULL; |
404 | } | |
405 | ||
f91e3bd8 SR |
406 | static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer, |
407 | u16 datagram_label) | |
408 | { | |
409 | struct fwnet_partial_datagram *pd; | |
c76acec6 | 410 | |
f91e3bd8 SR |
411 | list_for_each_entry(pd, &peer->pd_list, pd_link) |
412 | if (pd->datagram_label == datagram_label) | |
c76acec6 | 413 | return pd; |
f91e3bd8 | 414 | |
c76acec6 JF |
415 | return NULL; |
416 | } | |
417 | ||
418 | ||
f91e3bd8 SR |
419 | static void fwnet_pd_delete(struct fwnet_partial_datagram *old) |
420 | { | |
421 | struct fwnet_fragment_info *fi, *n; | |
c76acec6 | 422 | |
f91e3bd8 | 423 | list_for_each_entry_safe(fi, n, &old->fi_list, fi_link) |
c76acec6 | 424 | kfree(fi); |
f91e3bd8 SR |
425 | |
426 | list_del(&old->pd_link); | |
c76acec6 JF |
427 | dev_kfree_skb_any(old->skb); |
428 | kfree(old); | |
429 | } | |
430 | ||
f91e3bd8 SR |
431 | static bool fwnet_pd_update(struct fwnet_peer *peer, |
432 | struct fwnet_partial_datagram *pd, void *frag_buf, | |
433 | unsigned frag_off, unsigned frag_len) | |
434 | { | |
435 | if (fwnet_frag_new(pd, frag_off, frag_len) == NULL) | |
c76acec6 | 436 | return false; |
f91e3bd8 | 437 | |
c76acec6 JF |
438 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
439 | ||
440 | /* | |
25985edc | 441 | * Move list entry to beginning of list so that oldest partial |
c76acec6 JF |
442 | * datagrams percolate to the end of the list |
443 | */ | |
f91e3bd8 SR |
444 | list_move_tail(&pd->pd_link, &peer->pd_list); |
445 | ||
c76acec6 JF |
446 | return true; |
447 | } | |
448 | ||
f91e3bd8 SR |
449 | static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd) |
450 | { | |
451 | struct fwnet_fragment_info *fi; | |
c76acec6 | 452 | |
f91e3bd8 | 453 | fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link); |
c76acec6 | 454 | |
f91e3bd8 | 455 | return fi->len == pd->datagram_size; |
c76acec6 JF |
456 | } |
457 | ||
5a124d38 | 458 | /* caller must hold dev->lock */ |
f91e3bd8 SR |
459 | static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev, |
460 | u64 guid) | |
461 | { | |
5a124d38 | 462 | struct fwnet_peer *peer; |
c76acec6 | 463 | |
5a124d38 SR |
464 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
465 | if (peer->guid == guid) | |
466 | return peer; | |
c76acec6 | 467 | |
5a124d38 | 468 | return NULL; |
c76acec6 JF |
469 | } |
470 | ||
5a124d38 | 471 | /* caller must hold dev->lock */ |
f91e3bd8 | 472 | static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev, |
5a124d38 | 473 | int node_id, int generation) |
f91e3bd8 | 474 | { |
5a124d38 | 475 | struct fwnet_peer *peer; |
c76acec6 | 476 | |
5a124d38 SR |
477 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
478 | if (peer->node_id == node_id && | |
479 | peer->generation == generation) | |
480 | return peer; | |
f91e3bd8 | 481 | |
5a124d38 | 482 | return NULL; |
c76acec6 JF |
483 | } |
484 | ||
5a124d38 SR |
485 | /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */ |
486 | static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed) | |
f91e3bd8 | 487 | { |
5a124d38 | 488 | max_rec = min(max_rec, speed + 8); |
4ec4a67a | 489 | max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */ |
5a124d38 SR |
490 | |
491 | return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; | |
c76acec6 JF |
492 | } |
493 | ||
5a124d38 | 494 | |
f91e3bd8 SR |
495 | static int fwnet_finish_incoming_packet(struct net_device *net, |
496 | struct sk_buff *skb, u16 source_node_id, | |
497 | bool is_broadcast, u16 ether_type) | |
498 | { | |
499 | struct fwnet_device *dev; | |
c76acec6 | 500 | int status; |
f91e3bd8 | 501 | __be64 guid; |
c76acec6 | 502 | |
18406d7e YH |
503 | switch (ether_type) { |
504 | case ETH_P_ARP: | |
505 | case ETH_P_IP: | |
cb6bf355 YH |
506 | #if IS_ENABLED(CONFIG_IPV6) |
507 | case ETH_P_IPV6: | |
508 | #endif | |
18406d7e YH |
509 | break; |
510 | default: | |
511 | goto err; | |
512 | } | |
513 | ||
f91e3bd8 | 514 | dev = netdev_priv(net); |
c76acec6 | 515 | /* Write metadata, and then pass to the receive level */ |
f91e3bd8 | 516 | skb->dev = net; |
b577d7e2 | 517 | skb->ip_summed = CHECKSUM_NONE; |
c76acec6 JF |
518 | |
519 | /* | |
520 | * Parse the encapsulation header. This actually does the job of | |
6752c8db | 521 | * converting to an ethernet-like pseudo frame header. |
c76acec6 | 522 | */ |
f91e3bd8 SR |
523 | guid = cpu_to_be64(dev->card->guid); |
524 | if (dev_hard_header(skb, net, ether_type, | |
6752c8db | 525 | is_broadcast ? net->broadcast : net->dev_addr, |
f91e3bd8 SR |
526 | NULL, skb->len) >= 0) { |
527 | struct fwnet_header *eth; | |
c76acec6 JF |
528 | u16 *rawp; |
529 | __be16 protocol; | |
530 | ||
531 | skb_reset_mac_header(skb); | |
532 | skb_pull(skb, sizeof(*eth)); | |
f91e3bd8 | 533 | eth = (struct fwnet_header *)skb_mac_header(skb); |
021b97e4 | 534 | if (fwnet_hwaddr_is_multicast(eth->h_dest)) { |
f91e3bd8 SR |
535 | if (memcmp(eth->h_dest, net->broadcast, |
536 | net->addr_len) == 0) | |
c76acec6 | 537 | skb->pkt_type = PACKET_BROADCAST; |
c76acec6 JF |
538 | #if 0 |
539 | else | |
540 | skb->pkt_type = PACKET_MULTICAST; | |
541 | #endif | |
542 | } else { | |
156ce867 | 543 | if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) |
c76acec6 | 544 | skb->pkt_type = PACKET_OTHERHOST; |
c76acec6 | 545 | } |
e5c5d22e | 546 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) { |
c76acec6 JF |
547 | protocol = eth->h_proto; |
548 | } else { | |
549 | rawp = (u16 *)skb->data; | |
f91e3bd8 | 550 | if (*rawp == 0xffff) |
c76acec6 | 551 | protocol = htons(ETH_P_802_3); |
f91e3bd8 | 552 | else |
c76acec6 | 553 | protocol = htons(ETH_P_802_2); |
c76acec6 JF |
554 | } |
555 | skb->protocol = protocol; | |
556 | } | |
557 | status = netif_rx(skb); | |
f91e3bd8 SR |
558 | if (status == NET_RX_DROP) { |
559 | net->stats.rx_errors++; | |
560 | net->stats.rx_dropped++; | |
c76acec6 | 561 | } else { |
f91e3bd8 SR |
562 | net->stats.rx_packets++; |
563 | net->stats.rx_bytes += skb->len; | |
c76acec6 | 564 | } |
f91e3bd8 | 565 | |
c76acec6 JF |
566 | return 0; |
567 | ||
18406d7e | 568 | err: |
f91e3bd8 SR |
569 | net->stats.rx_errors++; |
570 | net->stats.rx_dropped++; | |
571 | ||
c76acec6 | 572 | dev_kfree_skb_any(skb); |
f91e3bd8 | 573 | |
1bf145fe | 574 | return -ENOENT; |
c76acec6 JF |
575 | } |
576 | ||
f91e3bd8 | 577 | static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, |
5a124d38 SR |
578 | int source_node_id, int generation, |
579 | bool is_broadcast) | |
f91e3bd8 | 580 | { |
c76acec6 | 581 | struct sk_buff *skb; |
5a124d38 | 582 | struct net_device *net = dev->netdev; |
f91e3bd8 | 583 | struct rfc2734_header hdr; |
c76acec6 JF |
584 | unsigned lf; |
585 | unsigned long flags; | |
f91e3bd8 SR |
586 | struct fwnet_peer *peer; |
587 | struct fwnet_partial_datagram *pd; | |
c76acec6 JF |
588 | int fg_off; |
589 | int dg_size; | |
590 | u16 datagram_label; | |
591 | int retval; | |
592 | u16 ether_type; | |
593 | ||
f91e3bd8 SR |
594 | hdr.w0 = be32_to_cpu(buf[0]); |
595 | lf = fwnet_get_hdr_lf(&hdr); | |
596 | if (lf == RFC2374_HDR_UNFRAG) { | |
c76acec6 JF |
597 | /* |
598 | * An unfragmented datagram has been received by the ieee1394 | |
599 | * bus. Build an skbuff around it so we can pass it to the | |
600 | * high level network layer. | |
601 | */ | |
f91e3bd8 | 602 | ether_type = fwnet_get_hdr_ether_type(&hdr); |
c76acec6 | 603 | buf++; |
f91e3bd8 | 604 | len -= RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 | 605 | |
82586340 | 606 | skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net)); |
c76acec6 | 607 | if (unlikely(!skb)) { |
f91e3bd8 SR |
608 | net->stats.rx_dropped++; |
609 | ||
1bf145fe | 610 | return -ENOMEM; |
c76acec6 | 611 | } |
82586340 | 612 | skb_reserve(skb, LL_RESERVED_SPACE(net)); |
f91e3bd8 SR |
613 | memcpy(skb_put(skb, len), buf, len); |
614 | ||
615 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
616 | is_broadcast, ether_type); | |
c76acec6 JF |
617 | } |
618 | /* A datagram fragment has been received, now the fun begins. */ | |
619 | hdr.w1 = ntohl(buf[1]); | |
f91e3bd8 SR |
620 | buf += 2; |
621 | len -= RFC2374_FRAG_HDR_SIZE; | |
622 | if (lf == RFC2374_HDR_FIRSTFRAG) { | |
623 | ether_type = fwnet_get_hdr_ether_type(&hdr); | |
c76acec6 JF |
624 | fg_off = 0; |
625 | } else { | |
f91e3bd8 SR |
626 | ether_type = 0; |
627 | fg_off = fwnet_get_hdr_fg_off(&hdr); | |
c76acec6 | 628 | } |
f91e3bd8 SR |
629 | datagram_label = fwnet_get_hdr_dgl(&hdr); |
630 | dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */ | |
f91e3bd8 | 631 | |
5a124d38 SR |
632 | spin_lock_irqsave(&dev->lock, flags); |
633 | ||
634 | peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); | |
1bf145fe SR |
635 | if (!peer) { |
636 | retval = -ENOENT; | |
637 | goto fail; | |
638 | } | |
f91e3bd8 SR |
639 | |
640 | pd = fwnet_pd_find(peer, datagram_label); | |
c76acec6 | 641 | if (pd == NULL) { |
f91e3bd8 | 642 | while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { |
c76acec6 | 643 | /* remove the oldest */ |
f91e3bd8 SR |
644 | fwnet_pd_delete(list_first_entry(&peer->pd_list, |
645 | struct fwnet_partial_datagram, pd_link)); | |
646 | peer->pdg_size--; | |
c76acec6 | 647 | } |
f91e3bd8 SR |
648 | pd = fwnet_pd_new(net, peer, datagram_label, |
649 | dg_size, buf, fg_off, len); | |
650 | if (pd == NULL) { | |
c76acec6 | 651 | retval = -ENOMEM; |
1bf145fe | 652 | goto fail; |
c76acec6 | 653 | } |
f91e3bd8 | 654 | peer->pdg_size++; |
c76acec6 | 655 | } else { |
f91e3bd8 SR |
656 | if (fwnet_frag_overlap(pd, fg_off, len) || |
657 | pd->datagram_size != dg_size) { | |
c76acec6 JF |
658 | /* |
659 | * Differing datagram sizes or overlapping fragments, | |
f91e3bd8 | 660 | * discard old datagram and start a new one. |
c76acec6 | 661 | */ |
f91e3bd8 SR |
662 | fwnet_pd_delete(pd); |
663 | pd = fwnet_pd_new(net, peer, datagram_label, | |
664 | dg_size, buf, fg_off, len); | |
665 | if (pd == NULL) { | |
f91e3bd8 | 666 | peer->pdg_size--; |
1bf145fe SR |
667 | retval = -ENOMEM; |
668 | goto fail; | |
c76acec6 JF |
669 | } |
670 | } else { | |
f91e3bd8 | 671 | if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { |
c76acec6 JF |
672 | /* |
673 | * Couldn't save off fragment anyway | |
674 | * so might as well obliterate the | |
675 | * datagram now. | |
676 | */ | |
f91e3bd8 SR |
677 | fwnet_pd_delete(pd); |
678 | peer->pdg_size--; | |
1bf145fe SR |
679 | retval = -ENOMEM; |
680 | goto fail; | |
c76acec6 JF |
681 | } |
682 | } | |
683 | } /* new datagram or add to existing one */ | |
684 | ||
f91e3bd8 | 685 | if (lf == RFC2374_HDR_FIRSTFRAG) |
c76acec6 | 686 | pd->ether_type = ether_type; |
f91e3bd8 SR |
687 | |
688 | if (fwnet_pd_is_complete(pd)) { | |
c76acec6 | 689 | ether_type = pd->ether_type; |
f91e3bd8 | 690 | peer->pdg_size--; |
c76acec6 | 691 | skb = skb_get(pd->skb); |
f91e3bd8 SR |
692 | fwnet_pd_delete(pd); |
693 | ||
5a124d38 | 694 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
695 | |
696 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
697 | false, ether_type); | |
c76acec6 JF |
698 | } |
699 | /* | |
700 | * Datagram is not complete, we're done for the | |
701 | * moment. | |
702 | */ | |
b2268830 | 703 | retval = 0; |
1bf145fe | 704 | fail: |
5a124d38 | 705 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 | 706 | |
1bf145fe | 707 | return retval; |
c76acec6 JF |
708 | } |
709 | ||
f91e3bd8 SR |
710 | static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |
711 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
712 | unsigned long long offset, void *payload, size_t length, |
713 | void *callback_data) | |
f91e3bd8 | 714 | { |
00635b8e SR |
715 | struct fwnet_device *dev = callback_data; |
716 | int rcode; | |
c76acec6 | 717 | |
00635b8e SR |
718 | if (destination == IEEE1394_ALL_NODES) { |
719 | kfree(r); | |
f91e3bd8 | 720 | |
c76acec6 JF |
721 | return; |
722 | } | |
f91e3bd8 | 723 | |
00635b8e SR |
724 | if (offset != dev->handler.offset) |
725 | rcode = RCODE_ADDRESS_ERROR; | |
726 | else if (tcode != TCODE_WRITE_BLOCK_REQUEST) | |
727 | rcode = RCODE_TYPE_ERROR; | |
728 | else if (fwnet_incoming_packet(dev, payload, length, | |
729 | source, generation, false) != 0) { | |
8408dc1c | 730 | dev_err(&dev->netdev->dev, "incoming packet failure\n"); |
00635b8e SR |
731 | rcode = RCODE_CONFLICT_ERROR; |
732 | } else | |
733 | rcode = RCODE_COMPLETE; | |
f91e3bd8 | 734 | |
00635b8e | 735 | fw_send_response(card, r, rcode); |
c76acec6 JF |
736 | } |
737 | ||
f91e3bd8 SR |
738 | static void fwnet_receive_broadcast(struct fw_iso_context *context, |
739 | u32 cycle, size_t header_length, void *header, void *data) | |
740 | { | |
741 | struct fwnet_device *dev; | |
c76acec6 | 742 | struct fw_iso_packet packet; |
f91e3bd8 SR |
743 | __be16 *hdr_ptr; |
744 | __be32 *buf_ptr; | |
c76acec6 JF |
745 | int retval; |
746 | u32 length; | |
747 | u16 source_node_id; | |
748 | u32 specifier_id; | |
749 | u32 ver; | |
750 | unsigned long offset; | |
751 | unsigned long flags; | |
752 | ||
f91e3bd8 | 753 | dev = data; |
c76acec6 | 754 | hdr_ptr = header; |
f91e3bd8 SR |
755 | length = be16_to_cpup(hdr_ptr); |
756 | ||
757 | spin_lock_irqsave(&dev->lock, flags); | |
758 | ||
759 | offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; | |
760 | buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; | |
761 | if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) | |
762 | dev->broadcast_rcv_next_ptr = 0; | |
763 | ||
764 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 JF |
765 | |
766 | specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 | |
767 | | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; | |
f91e3bd8 | 768 | ver = be32_to_cpu(buf_ptr[1]) & 0xffffff; |
c76acec6 | 769 | source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; |
f91e3bd8 | 770 | |
cb6bf355 YH |
771 | if (specifier_id == IANA_SPECIFIER_ID && |
772 | (ver == RFC2734_SW_VERSION | |
773 | #if IS_ENABLED(CONFIG_IPV6) | |
774 | || ver == RFC3146_SW_VERSION | |
775 | #endif | |
776 | )) { | |
c76acec6 | 777 | buf_ptr += 2; |
f91e3bd8 | 778 | length -= IEEE1394_GASP_HDR_SIZE; |
9d237342 SG |
779 | fwnet_incoming_packet(dev, buf_ptr, length, source_node_id, |
780 | context->card->generation, true); | |
f91e3bd8 SR |
781 | } |
782 | ||
783 | packet.payload_length = dev->rcv_buffer_size; | |
c76acec6 JF |
784 | packet.interrupt = 1; |
785 | packet.skip = 0; | |
786 | packet.tag = 3; | |
787 | packet.sy = 0; | |
f91e3bd8 SR |
788 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
789 | ||
790 | spin_lock_irqsave(&dev->lock, flags); | |
c76acec6 | 791 | |
f91e3bd8 SR |
792 | retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, |
793 | &dev->broadcast_rcv_buffer, offset); | |
794 | ||
795 | spin_unlock_irqrestore(&dev->lock, flags); | |
796 | ||
13882a82 CL |
797 | if (retval >= 0) |
798 | fw_iso_context_queue_flush(dev->broadcast_rcv_context); | |
799 | else | |
8408dc1c | 800 | dev_err(&dev->netdev->dev, "requeue failed\n"); |
c76acec6 JF |
801 | } |
802 | ||
f91e3bd8 SR |
803 | static struct kmem_cache *fwnet_packet_task_cache; |
804 | ||
110f82d7 SR |
805 | static void fwnet_free_ptask(struct fwnet_packet_task *ptask) |
806 | { | |
807 | dev_kfree_skb_any(ptask->skb); | |
808 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
809 | } | |
810 | ||
b2268830 SR |
811 | /* Caller must hold dev->lock. */ |
812 | static void dec_queued_datagrams(struct fwnet_device *dev) | |
813 | { | |
814 | if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS) | |
815 | netif_wake_queue(dev->netdev); | |
816 | } | |
817 | ||
f91e3bd8 SR |
818 | static int fwnet_send_packet(struct fwnet_packet_task *ptask); |
819 | ||
820 | static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) | |
821 | { | |
110f82d7 | 822 | struct fwnet_device *dev = ptask->dev; |
902bca00 | 823 | struct sk_buff *skb = ptask->skb; |
c76acec6 | 824 | unsigned long flags; |
110f82d7 | 825 | bool free; |
f91e3bd8 SR |
826 | |
827 | spin_lock_irqsave(&dev->lock, flags); | |
f91e3bd8 | 828 | |
110f82d7 SR |
829 | ptask->outstanding_pkts--; |
830 | ||
831 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 832 | free = (ptask->outstanding_pkts == 0 && ptask->enqueued); |
7ee11fa8 | 833 | if (free) |
b2268830 | 834 | dec_queued_datagrams(dev); |
110f82d7 | 835 | |
902bca00 | 836 | if (ptask->outstanding_pkts == 0) { |
902bca00 SR |
837 | dev->netdev->stats.tx_packets++; |
838 | dev->netdev->stats.tx_bytes += skb->len; | |
839 | } | |
110f82d7 SR |
840 | |
841 | spin_unlock_irqrestore(&dev->lock, flags); | |
f91e3bd8 SR |
842 | |
843 | if (ptask->outstanding_pkts > 0) { | |
c76acec6 JF |
844 | u16 dg_size; |
845 | u16 fg_off; | |
846 | u16 datagram_label; | |
847 | u16 lf; | |
c76acec6 JF |
848 | |
849 | /* Update the ptask to point to the next fragment and send it */ | |
f91e3bd8 | 850 | lf = fwnet_get_hdr_lf(&ptask->hdr); |
c76acec6 | 851 | switch (lf) { |
f91e3bd8 SR |
852 | case RFC2374_HDR_LASTFRAG: |
853 | case RFC2374_HDR_UNFRAG: | |
c76acec6 | 854 | default: |
8408dc1c SR |
855 | dev_err(&dev->netdev->dev, |
856 | "outstanding packet %x lf %x, header %x,%x\n", | |
857 | ptask->outstanding_pkts, lf, ptask->hdr.w0, | |
858 | ptask->hdr.w1); | |
c76acec6 JF |
859 | BUG(); |
860 | ||
f91e3bd8 | 861 | case RFC2374_HDR_FIRSTFRAG: |
c76acec6 | 862 | /* Set frag type here for future interior fragments */ |
f91e3bd8 SR |
863 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); |
864 | fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
865 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
866 | break; |
867 | ||
f91e3bd8 SR |
868 | case RFC2374_HDR_INTFRAG: |
869 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); | |
870 | fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) | |
871 | + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
872 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
873 | break; |
874 | } | |
902bca00 | 875 | |
9d237342 SG |
876 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
877 | skb_pull(skb, | |
878 | ptask->max_payload + IEEE1394_GASP_HDR_SIZE); | |
879 | } else { | |
880 | skb_pull(skb, ptask->max_payload); | |
881 | } | |
f91e3bd8 SR |
882 | if (ptask->outstanding_pkts > 1) { |
883 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, | |
884 | dg_size, fg_off, datagram_label); | |
c76acec6 | 885 | } else { |
f91e3bd8 SR |
886 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, |
887 | dg_size, fg_off, datagram_label); | |
888 | ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; | |
c76acec6 | 889 | } |
f91e3bd8 | 890 | fwnet_send_packet(ptask); |
c76acec6 | 891 | } |
110f82d7 SR |
892 | |
893 | if (free) | |
894 | fwnet_free_ptask(ptask); | |
c76acec6 JF |
895 | } |
896 | ||
7ee11fa8 SR |
897 | static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask) |
898 | { | |
899 | struct fwnet_device *dev = ptask->dev; | |
900 | unsigned long flags; | |
901 | bool free; | |
902 | ||
903 | spin_lock_irqsave(&dev->lock, flags); | |
904 | ||
905 | /* One fragment failed; don't try to send remaining fragments. */ | |
906 | ptask->outstanding_pkts = 0; | |
907 | ||
908 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 909 | free = ptask->enqueued; |
7ee11fa8 | 910 | if (free) |
b2268830 | 911 | dec_queued_datagrams(dev); |
7ee11fa8 SR |
912 | |
913 | dev->netdev->stats.tx_dropped++; | |
914 | dev->netdev->stats.tx_errors++; | |
915 | ||
916 | spin_unlock_irqrestore(&dev->lock, flags); | |
917 | ||
918 | if (free) | |
919 | fwnet_free_ptask(ptask); | |
920 | } | |
921 | ||
f91e3bd8 SR |
922 | static void fwnet_write_complete(struct fw_card *card, int rcode, |
923 | void *payload, size_t length, void *data) | |
924 | { | |
c4d6fd40 ML |
925 | struct fwnet_packet_task *ptask = data; |
926 | static unsigned long j; | |
927 | static int last_rcode, errors_skipped; | |
c76acec6 | 928 | |
7ee11fa8 | 929 | if (rcode == RCODE_COMPLETE) { |
f91e3bd8 | 930 | fwnet_transmit_packet_done(ptask); |
7ee11fa8 | 931 | } else { |
c4d6fd40 | 932 | if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) { |
8408dc1c SR |
933 | dev_err(&ptask->dev->netdev->dev, |
934 | "fwnet_write_complete failed: %x (skipped %d)\n", | |
935 | rcode, errors_skipped); | |
c4d6fd40 ML |
936 | |
937 | errors_skipped = 0; | |
938 | last_rcode = rcode; | |
89875833 | 939 | } else { |
c4d6fd40 | 940 | errors_skipped++; |
89875833 SR |
941 | } |
942 | fwnet_transmit_packet_failed(ptask); | |
7ee11fa8 | 943 | } |
c76acec6 JF |
944 | } |
945 | ||
f91e3bd8 SR |
946 | static int fwnet_send_packet(struct fwnet_packet_task *ptask) |
947 | { | |
948 | struct fwnet_device *dev; | |
c76acec6 | 949 | unsigned tx_len; |
f91e3bd8 | 950 | struct rfc2734_header *bufhdr; |
c76acec6 | 951 | unsigned long flags; |
110f82d7 | 952 | bool free; |
c76acec6 | 953 | |
f91e3bd8 | 954 | dev = ptask->dev; |
c76acec6 | 955 | tx_len = ptask->max_payload; |
f91e3bd8 SR |
956 | switch (fwnet_get_hdr_lf(&ptask->hdr)) { |
957 | case RFC2374_HDR_UNFRAG: | |
958 | bufhdr = (struct rfc2734_header *) | |
959 | skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); | |
960 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
c76acec6 JF |
961 | break; |
962 | ||
f91e3bd8 SR |
963 | case RFC2374_HDR_FIRSTFRAG: |
964 | case RFC2374_HDR_INTFRAG: | |
965 | case RFC2374_HDR_LASTFRAG: | |
966 | bufhdr = (struct rfc2734_header *) | |
967 | skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); | |
968 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); | |
969 | put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); | |
c76acec6 JF |
970 | break; |
971 | ||
972 | default: | |
973 | BUG(); | |
974 | } | |
f91e3bd8 SR |
975 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
976 | u8 *p; | |
c76acec6 | 977 | int generation; |
f91e3bd8 | 978 | int node_id; |
cb6bf355 | 979 | unsigned int sw_version; |
c76acec6 JF |
980 | |
981 | /* ptask->generation may not have been set yet */ | |
f91e3bd8 | 982 | generation = dev->card->generation; |
c76acec6 | 983 | smp_rmb(); |
f91e3bd8 SR |
984 | node_id = dev->card->node_id; |
985 | ||
cb6bf355 YH |
986 | switch (ptask->skb->protocol) { |
987 | default: | |
988 | sw_version = RFC2734_SW_VERSION; | |
989 | break; | |
990 | #if IS_ENABLED(CONFIG_IPV6) | |
991 | case htons(ETH_P_IPV6): | |
992 | sw_version = RFC3146_SW_VERSION; | |
993 | #endif | |
994 | } | |
995 | ||
9d237342 | 996 | p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE); |
f91e3bd8 SR |
997 | put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); |
998 | put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 | |
cb6bf355 | 999 | | sw_version, &p[4]); |
f91e3bd8 SR |
1000 | |
1001 | /* We should not transmit if broadcast_channel.valid == 0. */ | |
1002 | fw_send_request(dev->card, &ptask->transaction, | |
1003 | TCODE_STREAM_DATA, | |
1004 | fw_stream_packet_destination_id(3, | |
1005 | IEEE1394_BROADCAST_CHANNEL, 0), | |
1006 | generation, SCODE_100, 0ULL, ptask->skb->data, | |
1007 | tx_len + 8, fwnet_write_complete, ptask); | |
1008 | ||
f91e3bd8 | 1009 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1010 | |
1011 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1012 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1013 | if (!free) |
48553011 SR |
1014 | ptask->enqueued = true; |
1015 | else | |
b2268830 | 1016 | dec_queued_datagrams(dev); |
110f82d7 | 1017 | |
f91e3bd8 SR |
1018 | spin_unlock_irqrestore(&dev->lock, flags); |
1019 | ||
110f82d7 | 1020 | goto out; |
c76acec6 | 1021 | } |
f91e3bd8 SR |
1022 | |
1023 | fw_send_request(dev->card, &ptask->transaction, | |
1024 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, | |
1025 | ptask->generation, ptask->speed, ptask->fifo_addr, | |
1026 | ptask->skb->data, tx_len, fwnet_write_complete, ptask); | |
1027 | ||
f91e3bd8 | 1028 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1029 | |
1030 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1031 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1032 | if (!free) |
48553011 SR |
1033 | ptask->enqueued = true; |
1034 | else | |
b2268830 | 1035 | dec_queued_datagrams(dev); |
110f82d7 | 1036 | |
f91e3bd8 SR |
1037 | spin_unlock_irqrestore(&dev->lock, flags); |
1038 | ||
5a124d38 | 1039 | dev->netdev->trans_start = jiffies; |
110f82d7 SR |
1040 | out: |
1041 | if (free) | |
1042 | fwnet_free_ptask(ptask); | |
f91e3bd8 | 1043 | |
c76acec6 JF |
1044 | return 0; |
1045 | } | |
1046 | ||
9d39c90a YH |
1047 | static void fwnet_fifo_stop(struct fwnet_device *dev) |
1048 | { | |
1049 | if (dev->local_fifo == FWNET_NO_FIFO_ADDR) | |
1050 | return; | |
1051 | ||
1052 | fw_core_remove_address_handler(&dev->handler); | |
1053 | dev->local_fifo = FWNET_NO_FIFO_ADDR; | |
1054 | } | |
1055 | ||
1056 | static int fwnet_fifo_start(struct fwnet_device *dev) | |
1057 | { | |
1058 | int retval; | |
1059 | ||
1060 | if (dev->local_fifo != FWNET_NO_FIFO_ADDR) | |
1061 | return 0; | |
1062 | ||
1063 | dev->handler.length = 4096; | |
1064 | dev->handler.address_callback = fwnet_receive_packet; | |
1065 | dev->handler.callback_data = dev; | |
1066 | ||
1067 | retval = fw_core_add_address_handler(&dev->handler, | |
1068 | &fw_high_memory_region); | |
1069 | if (retval < 0) | |
1070 | return retval; | |
1071 | ||
1072 | dev->local_fifo = dev->handler.offset; | |
1073 | ||
1074 | return 0; | |
1075 | } | |
1076 | ||
111534cd YH |
1077 | static void __fwnet_broadcast_stop(struct fwnet_device *dev) |
1078 | { | |
1079 | unsigned u; | |
1080 | ||
1081 | if (dev->broadcast_state != FWNET_BROADCAST_ERROR) { | |
1082 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) | |
1083 | kunmap(dev->broadcast_rcv_buffer.pages[u]); | |
1084 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); | |
1085 | } | |
1086 | if (dev->broadcast_rcv_context) { | |
1087 | fw_iso_context_destroy(dev->broadcast_rcv_context); | |
1088 | dev->broadcast_rcv_context = NULL; | |
1089 | } | |
1090 | kfree(dev->broadcast_rcv_buffer_ptrs); | |
1091 | dev->broadcast_rcv_buffer_ptrs = NULL; | |
1092 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1093 | } | |
1094 | ||
1095 | static void fwnet_broadcast_stop(struct fwnet_device *dev) | |
1096 | { | |
1097 | if (dev->broadcast_state == FWNET_BROADCAST_ERROR) | |
1098 | return; | |
1099 | fw_iso_context_stop(dev->broadcast_rcv_context); | |
1100 | __fwnet_broadcast_stop(dev); | |
1101 | } | |
1102 | ||
f91e3bd8 SR |
1103 | static int fwnet_broadcast_start(struct fwnet_device *dev) |
1104 | { | |
c76acec6 JF |
1105 | struct fw_iso_context *context; |
1106 | int retval; | |
1107 | unsigned num_packets; | |
1108 | unsigned max_receive; | |
1109 | struct fw_iso_packet packet; | |
1110 | unsigned long offset; | |
f2090594 | 1111 | void **ptrptr; |
c76acec6 | 1112 | unsigned u; |
c76acec6 | 1113 | |
2fbd8dfe YH |
1114 | if (dev->broadcast_state != FWNET_BROADCAST_ERROR) |
1115 | return 0; | |
1116 | ||
f91e3bd8 SR |
1117 | max_receive = 1U << (dev->card->max_receive + 1); |
1118 | num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; | |
1119 | ||
eac31d58 YH |
1120 | ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL); |
1121 | if (!ptrptr) { | |
1122 | retval = -ENOMEM; | |
111534cd | 1123 | goto failed; |
eac31d58 YH |
1124 | } |
1125 | dev->broadcast_rcv_buffer_ptrs = ptrptr; | |
1126 | ||
f2090594 YH |
1127 | context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE, |
1128 | IEEE1394_BROADCAST_CHANNEL, | |
1129 | dev->card->link_speed, 8, | |
1130 | fwnet_receive_broadcast, dev); | |
1131 | if (IS_ERR(context)) { | |
1132 | retval = PTR_ERR(context); | |
111534cd | 1133 | goto failed; |
f2090594 | 1134 | } |
f91e3bd8 | 1135 | |
f2090594 YH |
1136 | retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card, |
1137 | FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); | |
1138 | if (retval < 0) | |
111534cd YH |
1139 | goto failed; |
1140 | ||
1141 | dev->broadcast_state = FWNET_BROADCAST_STOPPED; | |
f91e3bd8 | 1142 | |
f2090594 YH |
1143 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { |
1144 | void *ptr; | |
1145 | unsigned v; | |
c76acec6 | 1146 | |
f2090594 YH |
1147 | ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); |
1148 | for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) | |
1149 | *ptrptr++ = (void *) ((char *)ptr + v * max_receive); | |
f91e3bd8 | 1150 | } |
f2090594 | 1151 | dev->broadcast_rcv_context = context; |
c76acec6 JF |
1152 | |
1153 | packet.payload_length = max_receive; | |
1154 | packet.interrupt = 1; | |
1155 | packet.skip = 0; | |
1156 | packet.tag = 3; | |
1157 | packet.sy = 0; | |
f91e3bd8 | 1158 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
c76acec6 | 1159 | offset = 0; |
f91e3bd8 SR |
1160 | |
1161 | for (u = 0; u < num_packets; u++) { | |
1162 | retval = fw_iso_context_queue(context, &packet, | |
1163 | &dev->broadcast_rcv_buffer, offset); | |
1164 | if (retval < 0) | |
111534cd | 1165 | goto failed; |
f91e3bd8 | 1166 | |
c76acec6 JF |
1167 | offset += max_receive; |
1168 | } | |
f91e3bd8 SR |
1169 | dev->num_broadcast_rcv_ptrs = num_packets; |
1170 | dev->rcv_buffer_size = max_receive; | |
1171 | dev->broadcast_rcv_next_ptr = 0U; | |
1172 | retval = fw_iso_context_start(context, -1, 0, | |
1173 | FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ | |
1174 | if (retval < 0) | |
111534cd | 1175 | goto failed; |
f91e3bd8 SR |
1176 | |
1177 | /* FIXME: adjust it according to the min. speed of all known peers? */ | |
1178 | dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 | |
1179 | - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; | |
1180 | dev->broadcast_state = FWNET_BROADCAST_RUNNING; | |
1181 | ||
c76acec6 JF |
1182 | return 0; |
1183 | ||
111534cd YH |
1184 | failed: |
1185 | __fwnet_broadcast_stop(dev); | |
c76acec6 JF |
1186 | return retval; |
1187 | } | |
1188 | ||
c1671470 SR |
1189 | static void set_carrier_state(struct fwnet_device *dev) |
1190 | { | |
1191 | if (dev->peer_count > 1) | |
1192 | netif_carrier_on(dev->netdev); | |
1193 | else | |
1194 | netif_carrier_off(dev->netdev); | |
1195 | } | |
1196 | ||
f91e3bd8 SR |
1197 | /* ifup */ |
1198 | static int fwnet_open(struct net_device *net) | |
1199 | { | |
1200 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1201 | int ret; |
1202 | ||
2fbd8dfe YH |
1203 | ret = fwnet_broadcast_start(dev); |
1204 | if (ret) | |
382c4b40 | 1205 | return ret; |
2fbd8dfe | 1206 | |
f91e3bd8 SR |
1207 | netif_start_queue(net); |
1208 | ||
c1671470 SR |
1209 | spin_lock_irq(&dev->lock); |
1210 | set_carrier_state(dev); | |
1211 | spin_unlock_irq(&dev->lock); | |
1212 | ||
c76acec6 JF |
1213 | return 0; |
1214 | } | |
1215 | ||
f91e3bd8 SR |
1216 | /* ifdown */ |
1217 | static int fwnet_stop(struct net_device *net) | |
c76acec6 | 1218 | { |
8559e7f0 YH |
1219 | struct fwnet_device *dev = netdev_priv(net); |
1220 | ||
f91e3bd8 | 1221 | netif_stop_queue(net); |
8559e7f0 | 1222 | fwnet_broadcast_stop(dev); |
c76acec6 | 1223 | |
c76acec6 JF |
1224 | return 0; |
1225 | } | |
1226 | ||
424efe9c | 1227 | static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) |
c76acec6 | 1228 | { |
f91e3bd8 SR |
1229 | struct fwnet_header hdr_buf; |
1230 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1231 | __be16 proto; |
1232 | u16 dest_node; | |
c76acec6 JF |
1233 | unsigned max_payload; |
1234 | u16 dg_size; | |
1235 | u16 *datagram_label_ptr; | |
f91e3bd8 | 1236 | struct fwnet_packet_task *ptask; |
5a124d38 SR |
1237 | struct fwnet_peer *peer; |
1238 | unsigned long flags; | |
c76acec6 | 1239 | |
b2268830 SR |
1240 | spin_lock_irqsave(&dev->lock, flags); |
1241 | ||
1242 | /* Can this happen? */ | |
1243 | if (netif_queue_stopped(dev->netdev)) { | |
1244 | spin_unlock_irqrestore(&dev->lock, flags); | |
1245 | ||
1246 | return NETDEV_TX_BUSY; | |
1247 | } | |
1248 | ||
f91e3bd8 | 1249 | ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); |
c76acec6 JF |
1250 | if (ptask == NULL) |
1251 | goto fail; | |
1252 | ||
1253 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1254 | if (!skb) | |
1255 | goto fail; | |
1256 | ||
1257 | /* | |
f91e3bd8 | 1258 | * Make a copy of the driver-specific header. |
c76acec6 JF |
1259 | * We might need to rebuild the header on tx failure. |
1260 | */ | |
1261 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
c76acec6 | 1262 | proto = hdr_buf.h_proto; |
18406d7e YH |
1263 | |
1264 | switch (proto) { | |
1265 | case htons(ETH_P_ARP): | |
1266 | case htons(ETH_P_IP): | |
cb6bf355 YH |
1267 | #if IS_ENABLED(CONFIG_IPV6) |
1268 | case htons(ETH_P_IPV6): | |
1269 | #endif | |
18406d7e YH |
1270 | break; |
1271 | default: | |
1272 | goto fail; | |
1273 | } | |
1274 | ||
1275 | skb_pull(skb, sizeof(hdr_buf)); | |
c76acec6 JF |
1276 | dg_size = skb->len; |
1277 | ||
1278 | /* | |
1279 | * Set the transmission type for the packet. ARP packets and IP | |
1280 | * broadcast packets are sent via GASP. | |
1281 | */ | |
021b97e4 | 1282 | if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) { |
5a124d38 | 1283 | max_payload = dev->broadcast_xmt_max_payload; |
f91e3bd8 SR |
1284 | datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; |
1285 | ||
5a124d38 SR |
1286 | ptask->fifo_addr = FWNET_NO_FIFO_ADDR; |
1287 | ptask->generation = 0; | |
1288 | ptask->dest_node = IEEE1394_ALL_NODES; | |
1289 | ptask->speed = SCODE_100; | |
c76acec6 | 1290 | } else { |
6752c8db YH |
1291 | union fwnet_hwaddr *ha = (union fwnet_hwaddr *)hdr_buf.h_dest; |
1292 | __be64 guid = get_unaligned(&ha->uc.uniq_id); | |
c76acec6 JF |
1293 | u8 generation; |
1294 | ||
f91e3bd8 | 1295 | peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); |
6752c8db | 1296 | if (!peer) |
b2268830 | 1297 | goto fail; |
c76acec6 | 1298 | |
5a124d38 SR |
1299 | generation = peer->generation; |
1300 | dest_node = peer->node_id; | |
1301 | max_payload = peer->max_payload; | |
f91e3bd8 | 1302 | datagram_label_ptr = &peer->datagram_label; |
c76acec6 | 1303 | |
6752c8db | 1304 | ptask->fifo_addr = fwnet_hwaddr_fifo(ha); |
5a124d38 SR |
1305 | ptask->generation = generation; |
1306 | ptask->dest_node = dest_node; | |
1307 | ptask->speed = peer->speed; | |
c76acec6 JF |
1308 | } |
1309 | ||
c76acec6 JF |
1310 | ptask->hdr.w0 = 0; |
1311 | ptask->hdr.w1 = 0; | |
1312 | ptask->skb = skb; | |
f91e3bd8 SR |
1313 | ptask->dev = dev; |
1314 | ||
c76acec6 | 1315 | /* Does it all fit in one packet? */ |
f91e3bd8 SR |
1316 | if (dg_size <= max_payload) { |
1317 | fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); | |
c76acec6 | 1318 | ptask->outstanding_pkts = 1; |
f91e3bd8 | 1319 | max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 JF |
1320 | } else { |
1321 | u16 datagram_label; | |
1322 | ||
f91e3bd8 | 1323 | max_payload -= RFC2374_FRAG_OVERHEAD; |
c76acec6 | 1324 | datagram_label = (*datagram_label_ptr)++; |
f91e3bd8 SR |
1325 | fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, |
1326 | datagram_label); | |
c76acec6 | 1327 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
f91e3bd8 | 1328 | max_payload += RFC2374_FRAG_HDR_SIZE; |
c76acec6 | 1329 | } |
5a124d38 | 1330 | |
b2268830 SR |
1331 | if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS) |
1332 | netif_stop_queue(dev->netdev); | |
48553011 | 1333 | |
5a124d38 SR |
1334 | spin_unlock_irqrestore(&dev->lock, flags); |
1335 | ||
c76acec6 | 1336 | ptask->max_payload = max_payload; |
48553011 | 1337 | ptask->enqueued = 0; |
110f82d7 | 1338 | |
f91e3bd8 SR |
1339 | fwnet_send_packet(ptask); |
1340 | ||
c76acec6 JF |
1341 | return NETDEV_TX_OK; |
1342 | ||
1343 | fail: | |
b2268830 SR |
1344 | spin_unlock_irqrestore(&dev->lock, flags); |
1345 | ||
c76acec6 | 1346 | if (ptask) |
f91e3bd8 | 1347 | kmem_cache_free(fwnet_packet_task_cache, ptask); |
c76acec6 JF |
1348 | |
1349 | if (skb != NULL) | |
1350 | dev_kfree_skb(skb); | |
1351 | ||
f91e3bd8 SR |
1352 | net->stats.tx_dropped++; |
1353 | net->stats.tx_errors++; | |
c76acec6 JF |
1354 | |
1355 | /* | |
1356 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1357 | * causes serious problems" here, allegedly. Before that patch, | |
1358 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1359 | * Perhaps more needs to be done? Stop the queue in serious | |
1360 | * conditions and restart it elsewhere? | |
1361 | */ | |
1362 | return NETDEV_TX_OK; | |
1363 | } | |
1364 | ||
f91e3bd8 SR |
1365 | static int fwnet_change_mtu(struct net_device *net, int new_mtu) |
1366 | { | |
c76acec6 JF |
1367 | if (new_mtu < 68) |
1368 | return -EINVAL; | |
1369 | ||
f91e3bd8 | 1370 | net->mtu = new_mtu; |
c76acec6 JF |
1371 | return 0; |
1372 | } | |
1373 | ||
18bb36f9 ML |
1374 | static const struct ethtool_ops fwnet_ethtool_ops = { |
1375 | .get_link = ethtool_op_get_link, | |
1376 | }; | |
1377 | ||
f91e3bd8 SR |
1378 | static const struct net_device_ops fwnet_netdev_ops = { |
1379 | .ndo_open = fwnet_open, | |
1380 | .ndo_stop = fwnet_stop, | |
1381 | .ndo_start_xmit = fwnet_tx, | |
f91e3bd8 | 1382 | .ndo_change_mtu = fwnet_change_mtu, |
c76acec6 JF |
1383 | }; |
1384 | ||
f91e3bd8 SR |
1385 | static void fwnet_init_dev(struct net_device *net) |
1386 | { | |
1387 | net->header_ops = &fwnet_header_ops; | |
1388 | net->netdev_ops = &fwnet_netdev_ops; | |
1337f853 | 1389 | net->watchdog_timeo = 2 * HZ; |
f91e3bd8 SR |
1390 | net->flags = IFF_BROADCAST | IFF_MULTICAST; |
1391 | net->features = NETIF_F_HIGHDMA; | |
1392 | net->addr_len = FWNET_ALEN; | |
1393 | net->hard_header_len = FWNET_HLEN; | |
1394 | net->type = ARPHRD_IEEE1394; | |
b2268830 | 1395 | net->tx_queue_len = FWNET_TX_QUEUE_LEN; |
18bb36f9 | 1396 | net->ethtool_ops = &fwnet_ethtool_ops; |
c76acec6 JF |
1397 | } |
1398 | ||
5a124d38 SR |
1399 | /* caller must hold fwnet_device_mutex */ |
1400 | static struct fwnet_device *fwnet_dev_find(struct fw_card *card) | |
1401 | { | |
1402 | struct fwnet_device *dev; | |
1403 | ||
1404 | list_for_each_entry(dev, &fwnet_device_list, dev_link) | |
1405 | if (dev->card == card) | |
1406 | return dev; | |
1407 | ||
1408 | return NULL; | |
1409 | } | |
1410 | ||
1411 | static int fwnet_add_peer(struct fwnet_device *dev, | |
1412 | struct fw_unit *unit, struct fw_device *device) | |
1413 | { | |
1414 | struct fwnet_peer *peer; | |
1415 | ||
1416 | peer = kmalloc(sizeof(*peer), GFP_KERNEL); | |
1417 | if (!peer) | |
1418 | return -ENOMEM; | |
1419 | ||
b01b4bab SR |
1420 | dev_set_drvdata(&unit->device, peer); |
1421 | ||
5a124d38 SR |
1422 | peer->dev = dev; |
1423 | peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; | |
5a124d38 SR |
1424 | INIT_LIST_HEAD(&peer->pd_list); |
1425 | peer->pdg_size = 0; | |
1426 | peer->datagram_label = 0; | |
1427 | peer->speed = device->max_speed; | |
1428 | peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); | |
1429 | ||
1430 | peer->generation = device->generation; | |
1431 | smp_rmb(); | |
1432 | peer->node_id = device->node_id; | |
1433 | ||
1434 | spin_lock_irq(&dev->lock); | |
1435 | list_add_tail(&peer->peer_link, &dev->peer_list); | |
18bb36f9 | 1436 | dev->peer_count++; |
c1671470 | 1437 | set_carrier_state(dev); |
5a124d38 SR |
1438 | spin_unlock_irq(&dev->lock); |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
94a87157 SR |
1443 | static int fwnet_probe(struct fw_unit *unit, |
1444 | const struct ieee1394_device_id *id) | |
f91e3bd8 | 1445 | { |
f91e3bd8 SR |
1446 | struct fw_device *device = fw_parent_device(unit); |
1447 | struct fw_card *card = device->card; | |
1448 | struct net_device *net; | |
b01b4bab | 1449 | bool allocated_netdev = false; |
f91e3bd8 | 1450 | struct fwnet_device *dev; |
c76acec6 | 1451 | unsigned max_mtu; |
5a124d38 | 1452 | int ret; |
6752c8db | 1453 | union fwnet_hwaddr *ha; |
c76acec6 | 1454 | |
5a124d38 | 1455 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1456 | |
5a124d38 SR |
1457 | dev = fwnet_dev_find(card); |
1458 | if (dev) { | |
5a124d38 SR |
1459 | net = dev->netdev; |
1460 | goto have_dev; | |
c76acec6 | 1461 | } |
5a124d38 | 1462 | |
c835a677 TG |
1463 | net = alloc_netdev(sizeof(*dev), "firewire%d", NET_NAME_UNKNOWN, |
1464 | fwnet_init_dev); | |
f91e3bd8 | 1465 | if (net == NULL) { |
1118f8d0 DY |
1466 | mutex_unlock(&fwnet_device_mutex); |
1467 | return -ENOMEM; | |
c76acec6 JF |
1468 | } |
1469 | ||
b01b4bab | 1470 | allocated_netdev = true; |
f91e3bd8 SR |
1471 | SET_NETDEV_DEV(net, card->device); |
1472 | dev = netdev_priv(net); | |
c76acec6 | 1473 | |
f91e3bd8 SR |
1474 | spin_lock_init(&dev->lock); |
1475 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1476 | dev->broadcast_rcv_context = NULL; | |
1477 | dev->broadcast_xmt_max_payload = 0; | |
1478 | dev->broadcast_xmt_datagramlabel = 0; | |
f91e3bd8 | 1479 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
48553011 | 1480 | dev->queued_datagrams = 0; |
5a124d38 | 1481 | INIT_LIST_HEAD(&dev->peer_list); |
f91e3bd8 | 1482 | dev->card = card; |
5a124d38 | 1483 | dev->netdev = net; |
c76acec6 | 1484 | |
382c4b40 YH |
1485 | ret = fwnet_fifo_start(dev); |
1486 | if (ret < 0) | |
1487 | goto out; | |
1488 | dev->local_fifo = dev->handler.offset; | |
1489 | ||
c76acec6 JF |
1490 | /* |
1491 | * Use the RFC 2734 default 1500 octets or the maximum payload | |
1492 | * as initial MTU | |
1493 | */ | |
1494 | max_mtu = (1 << (card->max_receive + 1)) | |
f91e3bd8 SR |
1495 | - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; |
1496 | net->mtu = min(1500U, max_mtu); | |
c76acec6 JF |
1497 | |
1498 | /* Set our hardware address while we're at it */ | |
6752c8db YH |
1499 | ha = (union fwnet_hwaddr *)net->dev_addr; |
1500 | put_unaligned_be64(card->guid, &ha->uc.uniq_id); | |
1501 | ha->uc.max_rec = dev->card->max_receive; | |
1502 | ha->uc.sspd = dev->card->link_speed; | |
1503 | put_unaligned_be16(dev->local_fifo >> 32, &ha->uc.fifo_hi); | |
1504 | put_unaligned_be32(dev->local_fifo & 0xffffffff, &ha->uc.fifo_lo); | |
1505 | ||
1506 | memset(net->broadcast, -1, net->addr_len); | |
1507 | ||
5a124d38 | 1508 | ret = register_netdev(net); |
8408dc1c | 1509 | if (ret) |
c76acec6 | 1510 | goto out; |
c76acec6 | 1511 | |
5a124d38 | 1512 | list_add_tail(&dev->dev_link, &fwnet_device_list); |
cb6bf355 | 1513 | dev_notice(&net->dev, "IP over IEEE 1394 on card %s\n", |
8408dc1c | 1514 | dev_name(card->device)); |
5a124d38 SR |
1515 | have_dev: |
1516 | ret = fwnet_add_peer(dev, unit, device); | |
b01b4bab | 1517 | if (ret && allocated_netdev) { |
5a124d38 SR |
1518 | unregister_netdev(net); |
1519 | list_del(&dev->dev_link); | |
c76acec6 | 1520 | out: |
382c4b40 | 1521 | fwnet_fifo_stop(dev); |
f91e3bd8 | 1522 | free_netdev(net); |
382c4b40 | 1523 | } |
f91e3bd8 | 1524 | |
5a124d38 SR |
1525 | mutex_unlock(&fwnet_device_mutex); |
1526 | ||
1527 | return ret; | |
1528 | } | |
1529 | ||
94a87157 SR |
1530 | /* |
1531 | * FIXME abort partially sent fragmented datagrams, | |
1532 | * discard partially received fragmented datagrams | |
1533 | */ | |
1534 | static void fwnet_update(struct fw_unit *unit) | |
1535 | { | |
1536 | struct fw_device *device = fw_parent_device(unit); | |
1537 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); | |
1538 | int generation; | |
1539 | ||
1540 | generation = device->generation; | |
1541 | ||
1542 | spin_lock_irq(&peer->dev->lock); | |
1543 | peer->node_id = device->node_id; | |
1544 | peer->generation = generation; | |
1545 | spin_unlock_irq(&peer->dev->lock); | |
1546 | } | |
1547 | ||
c1671470 | 1548 | static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev) |
5a124d38 SR |
1549 | { |
1550 | struct fwnet_partial_datagram *pd, *pd_next; | |
1551 | ||
c1671470 | 1552 | spin_lock_irq(&dev->lock); |
5a124d38 | 1553 | list_del(&peer->peer_link); |
c1671470 SR |
1554 | dev->peer_count--; |
1555 | set_carrier_state(dev); | |
1556 | spin_unlock_irq(&dev->lock); | |
5a124d38 SR |
1557 | |
1558 | list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) | |
1559 | fwnet_pd_delete(pd); | |
1560 | ||
1561 | kfree(peer); | |
c76acec6 JF |
1562 | } |
1563 | ||
94a87157 | 1564 | static void fwnet_remove(struct fw_unit *unit) |
f91e3bd8 | 1565 | { |
94a87157 | 1566 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); |
5a124d38 | 1567 | struct fwnet_device *dev = peer->dev; |
f91e3bd8 | 1568 | struct net_device *net; |
48553011 | 1569 | int i; |
f91e3bd8 | 1570 | |
5a124d38 | 1571 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1572 | |
74a14504 | 1573 | net = dev->netdev; |
74a14504 | 1574 | |
c1671470 | 1575 | fwnet_remove_peer(peer, dev); |
18bb36f9 | 1576 | |
5a124d38 | 1577 | if (list_empty(&dev->peer_list)) { |
f91e3bd8 SR |
1578 | unregister_netdev(net); |
1579 | ||
382c4b40 YH |
1580 | fwnet_fifo_stop(dev); |
1581 | ||
48553011 SR |
1582 | for (i = 0; dev->queued_datagrams && i < 5; i++) |
1583 | ssleep(1); | |
1584 | WARN_ON(dev->queued_datagrams); | |
b01b4bab SR |
1585 | list_del(&dev->dev_link); |
1586 | ||
f91e3bd8 | 1587 | free_netdev(net); |
c76acec6 | 1588 | } |
f91e3bd8 | 1589 | |
5a124d38 | 1590 | mutex_unlock(&fwnet_device_mutex); |
c76acec6 JF |
1591 | } |
1592 | ||
f91e3bd8 SR |
1593 | static const struct ieee1394_device_id fwnet_id_table[] = { |
1594 | { | |
1595 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1596 | IEEE1394_MATCH_VERSION, | |
1597 | .specifier_id = IANA_SPECIFIER_ID, | |
1598 | .version = RFC2734_SW_VERSION, | |
1599 | }, | |
cb6bf355 YH |
1600 | #if IS_ENABLED(CONFIG_IPV6) |
1601 | { | |
1602 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1603 | IEEE1394_MATCH_VERSION, | |
1604 | .specifier_id = IANA_SPECIFIER_ID, | |
1605 | .version = RFC3146_SW_VERSION, | |
1606 | }, | |
1607 | #endif | |
f91e3bd8 SR |
1608 | { } |
1609 | }; | |
1610 | ||
1611 | static struct fw_driver fwnet_driver = { | |
c76acec6 | 1612 | .driver = { |
f91e3bd8 | 1613 | .owner = THIS_MODULE, |
59759ff6 | 1614 | .name = KBUILD_MODNAME, |
f91e3bd8 | 1615 | .bus = &fw_bus_type, |
c76acec6 | 1616 | }, |
94a87157 | 1617 | .probe = fwnet_probe, |
f91e3bd8 | 1618 | .update = fwnet_update, |
94a87157 | 1619 | .remove = fwnet_remove, |
f91e3bd8 SR |
1620 | .id_table = fwnet_id_table, |
1621 | }; | |
1622 | ||
1623 | static const u32 rfc2374_unit_directory_data[] = { | |
1624 | 0x00040000, /* directory_length */ | |
1625 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1626 | 0x81000003, /* textual descriptor offset */ | |
1627 | 0x13000001, /* unit_sw_version: RFC 2734 */ | |
1628 | 0x81000005, /* textual descriptor offset */ | |
1629 | 0x00030000, /* descriptor_length */ | |
1630 | 0x00000000, /* text */ | |
1631 | 0x00000000, /* minimal ASCII, en */ | |
1632 | 0x49414e41, /* I A N A */ | |
1633 | 0x00030000, /* descriptor_length */ | |
1634 | 0x00000000, /* text */ | |
1635 | 0x00000000, /* minimal ASCII, en */ | |
1636 | 0x49507634, /* I P v 4 */ | |
1637 | }; | |
1638 | ||
1639 | static struct fw_descriptor rfc2374_unit_directory = { | |
1640 | .length = ARRAY_SIZE(rfc2374_unit_directory_data), | |
1641 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1642 | .data = rfc2374_unit_directory_data | |
c76acec6 JF |
1643 | }; |
1644 | ||
cb6bf355 YH |
1645 | #if IS_ENABLED(CONFIG_IPV6) |
1646 | static const u32 rfc3146_unit_directory_data[] = { | |
1647 | 0x00040000, /* directory_length */ | |
1648 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1649 | 0x81000003, /* textual descriptor offset */ | |
1650 | 0x13000002, /* unit_sw_version: RFC 3146 */ | |
1651 | 0x81000005, /* textual descriptor offset */ | |
1652 | 0x00030000, /* descriptor_length */ | |
1653 | 0x00000000, /* text */ | |
1654 | 0x00000000, /* minimal ASCII, en */ | |
1655 | 0x49414e41, /* I A N A */ | |
1656 | 0x00030000, /* descriptor_length */ | |
1657 | 0x00000000, /* text */ | |
1658 | 0x00000000, /* minimal ASCII, en */ | |
1659 | 0x49507636, /* I P v 6 */ | |
1660 | }; | |
1661 | ||
1662 | static struct fw_descriptor rfc3146_unit_directory = { | |
1663 | .length = ARRAY_SIZE(rfc3146_unit_directory_data), | |
1664 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1665 | .data = rfc3146_unit_directory_data | |
1666 | }; | |
1667 | #endif | |
1668 | ||
f91e3bd8 SR |
1669 | static int __init fwnet_init(void) |
1670 | { | |
1671 | int err; | |
1672 | ||
1673 | err = fw_core_add_descriptor(&rfc2374_unit_directory); | |
1674 | if (err) | |
1675 | return err; | |
c76acec6 | 1676 | |
cb6bf355 YH |
1677 | #if IS_ENABLED(CONFIG_IPV6) |
1678 | err = fw_core_add_descriptor(&rfc3146_unit_directory); | |
1679 | if (err) | |
1680 | goto out; | |
1681 | #endif | |
1682 | ||
f91e3bd8 SR |
1683 | fwnet_packet_task_cache = kmem_cache_create("packet_task", |
1684 | sizeof(struct fwnet_packet_task), 0, 0, NULL); | |
1685 | if (!fwnet_packet_task_cache) { | |
1686 | err = -ENOMEM; | |
cb6bf355 | 1687 | goto out2; |
f91e3bd8 SR |
1688 | } |
1689 | ||
1690 | err = driver_register(&fwnet_driver.driver); | |
1691 | if (!err) | |
1692 | return 0; | |
1693 | ||
1694 | kmem_cache_destroy(fwnet_packet_task_cache); | |
cb6bf355 YH |
1695 | out2: |
1696 | #if IS_ENABLED(CONFIG_IPV6) | |
1697 | fw_core_remove_descriptor(&rfc3146_unit_directory); | |
f91e3bd8 | 1698 | out: |
cb6bf355 | 1699 | #endif |
f91e3bd8 SR |
1700 | fw_core_remove_descriptor(&rfc2374_unit_directory); |
1701 | ||
1702 | return err; | |
c76acec6 | 1703 | } |
f91e3bd8 | 1704 | module_init(fwnet_init); |
c76acec6 | 1705 | |
f91e3bd8 SR |
1706 | static void __exit fwnet_cleanup(void) |
1707 | { | |
1708 | driver_unregister(&fwnet_driver.driver); | |
1709 | kmem_cache_destroy(fwnet_packet_task_cache); | |
cb6bf355 YH |
1710 | #if IS_ENABLED(CONFIG_IPV6) |
1711 | fw_core_remove_descriptor(&rfc3146_unit_directory); | |
1712 | #endif | |
f91e3bd8 | 1713 | fw_core_remove_descriptor(&rfc2374_unit_directory); |
c76acec6 | 1714 | } |
f91e3bd8 | 1715 | module_exit(fwnet_cleanup); |
c76acec6 | 1716 | |
f91e3bd8 | 1717 | MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); |
cb6bf355 | 1718 | MODULE_DESCRIPTION("IP over IEEE1394 as per RFC 2734/3146"); |
f91e3bd8 SR |
1719 | MODULE_LICENSE("GPL"); |
1720 | MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); |