Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
c76acec6 JF |
2 | /* |
3 | * IPv4 over IEEE 1394, per RFC 2734 | |
cb6bf355 | 4 | * IPv6 over IEEE 1394, per RFC 3146 |
c76acec6 JF |
5 | * |
6 | * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com> | |
7 | * | |
8 | * based on eth1394 by Ben Collins et al | |
9 | */ | |
10 | ||
f91e3bd8 | 11 | #include <linux/bug.h> |
bf337b15 | 12 | #include <linux/compiler.h> |
48553011 | 13 | #include <linux/delay.h> |
c76acec6 | 14 | #include <linux/device.h> |
c1671470 | 15 | #include <linux/ethtool.h> |
c76acec6 JF |
16 | #include <linux/firewire.h> |
17 | #include <linux/firewire-constants.h> | |
18 | #include <linux/highmem.h> | |
19 | #include <linux/in.h> | |
20 | #include <linux/ip.h> | |
f91e3bd8 | 21 | #include <linux/jiffies.h> |
c76acec6 JF |
22 | #include <linux/mod_devicetable.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
5a124d38 | 25 | #include <linux/mutex.h> |
c76acec6 JF |
26 | #include <linux/netdevice.h> |
27 | #include <linux/skbuff.h> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
5a124d38 | 29 | #include <linux/spinlock.h> |
c76acec6 JF |
30 | |
31 | #include <asm/unaligned.h> | |
32 | #include <net/arp.h> | |
6752c8db | 33 | #include <net/firewire.h> |
c76acec6 | 34 | |
b2268830 SR |
35 | /* rx limits */ |
36 | #define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */ | |
37 | #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2) | |
38 | ||
39 | /* tx limits */ | |
40 | #define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */ | |
41 | #define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */ | |
42 | #define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */ | |
c76acec6 | 43 | |
f91e3bd8 SR |
44 | #define IEEE1394_BROADCAST_CHANNEL 31 |
45 | #define IEEE1394_ALL_NODES (0xffc0 | 0x003f) | |
46 | #define IEEE1394_MAX_PAYLOAD_S100 512 | |
47 | #define FWNET_NO_FIFO_ADDR (~0ULL) | |
c76acec6 | 48 | |
f91e3bd8 SR |
49 | #define IANA_SPECIFIER_ID 0x00005eU |
50 | #define RFC2734_SW_VERSION 0x000001U | |
cb6bf355 | 51 | #define RFC3146_SW_VERSION 0x000002U |
c76acec6 | 52 | |
f91e3bd8 | 53 | #define IEEE1394_GASP_HDR_SIZE 8 |
c76acec6 | 54 | |
f91e3bd8 SR |
55 | #define RFC2374_UNFRAG_HDR_SIZE 4 |
56 | #define RFC2374_FRAG_HDR_SIZE 8 | |
57 | #define RFC2374_FRAG_OVERHEAD 4 | |
c76acec6 | 58 | |
f91e3bd8 SR |
59 | #define RFC2374_HDR_UNFRAG 0 /* unfragmented */ |
60 | #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */ | |
61 | #define RFC2374_HDR_LASTFRAG 2 /* last fragment */ | |
62 | #define RFC2374_HDR_INTFRAG 3 /* interior fragment */ | |
c76acec6 | 63 | |
021b97e4 YH |
64 | static bool fwnet_hwaddr_is_multicast(u8 *ha) |
65 | { | |
66 | return !!(*ha & 1); | |
67 | } | |
68 | ||
f91e3bd8 SR |
69 | /* IPv4 and IPv6 encapsulation header */ |
70 | struct rfc2734_header { | |
c76acec6 JF |
71 | u32 w0; |
72 | u32 w1; | |
73 | }; | |
74 | ||
f91e3bd8 SR |
75 | #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) |
76 | #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) | |
e9300a4b | 77 | #define fwnet_get_hdr_dg_size(h) ((((h)->w0 & 0x0fff0000) >> 16) + 1) |
f91e3bd8 SR |
78 | #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) |
79 | #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) | |
c76acec6 | 80 | |
e9300a4b | 81 | #define fwnet_set_hdr_lf(lf) ((lf) << 30) |
f91e3bd8 | 82 | #define fwnet_set_hdr_ether_type(et) (et) |
e9300a4b | 83 | #define fwnet_set_hdr_dg_size(dgs) (((dgs) - 1) << 16) |
f91e3bd8 | 84 | #define fwnet_set_hdr_fg_off(fgo) (fgo) |
c76acec6 | 85 | |
f91e3bd8 | 86 | #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) |
c76acec6 | 87 | |
f91e3bd8 SR |
88 | static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, |
89 | unsigned ether_type) | |
90 | { | |
91 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) | |
92 | | fwnet_set_hdr_ether_type(ether_type); | |
93 | } | |
c76acec6 | 94 | |
f91e3bd8 SR |
95 | static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, |
96 | unsigned ether_type, unsigned dg_size, unsigned dgl) | |
97 | { | |
98 | hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) | |
99 | | fwnet_set_hdr_dg_size(dg_size) | |
100 | | fwnet_set_hdr_ether_type(ether_type); | |
101 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
102 | } | |
c76acec6 | 103 | |
f91e3bd8 SR |
104 | static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, |
105 | unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) | |
106 | { | |
107 | hdr->w0 = fwnet_set_hdr_lf(lf) | |
108 | | fwnet_set_hdr_dg_size(dg_size) | |
109 | | fwnet_set_hdr_fg_off(fg_off); | |
110 | hdr->w1 = fwnet_set_hdr_dgl(dgl); | |
111 | } | |
c76acec6 JF |
112 | |
113 | /* This list keeps track of what parts of the datagram have been filled in */ | |
f91e3bd8 SR |
114 | struct fwnet_fragment_info { |
115 | struct list_head fi_link; | |
c76acec6 JF |
116 | u16 offset; |
117 | u16 len; | |
118 | }; | |
119 | ||
f91e3bd8 SR |
120 | struct fwnet_partial_datagram { |
121 | struct list_head pd_link; | |
122 | struct list_head fi_list; | |
c76acec6 JF |
123 | struct sk_buff *skb; |
124 | /* FIXME Why not use skb->data? */ | |
125 | char *pbuf; | |
126 | u16 datagram_label; | |
127 | u16 ether_type; | |
128 | u16 datagram_size; | |
129 | }; | |
130 | ||
5a124d38 SR |
131 | static DEFINE_MUTEX(fwnet_device_mutex); |
132 | static LIST_HEAD(fwnet_device_list); | |
c76acec6 | 133 | |
f91e3bd8 | 134 | struct fwnet_device { |
5a124d38 | 135 | struct list_head dev_link; |
c76acec6 | 136 | spinlock_t lock; |
f91e3bd8 SR |
137 | enum { |
138 | FWNET_BROADCAST_ERROR, | |
139 | FWNET_BROADCAST_RUNNING, | |
140 | FWNET_BROADCAST_STOPPED, | |
141 | } broadcast_state; | |
c76acec6 JF |
142 | struct fw_iso_context *broadcast_rcv_context; |
143 | struct fw_iso_buffer broadcast_rcv_buffer; | |
144 | void **broadcast_rcv_buffer_ptrs; | |
145 | unsigned broadcast_rcv_next_ptr; | |
146 | unsigned num_broadcast_rcv_ptrs; | |
147 | unsigned rcv_buffer_size; | |
148 | /* | |
149 | * This value is the maximum unfragmented datagram size that can be | |
150 | * sent by the hardware. It already has the GASP overhead and the | |
151 | * unfragmented datagram header overhead calculated into it. | |
152 | */ | |
153 | unsigned broadcast_xmt_max_payload; | |
154 | u16 broadcast_xmt_datagramlabel; | |
155 | ||
156 | /* | |
f91e3bd8 | 157 | * The CSR address that remote nodes must send datagrams to for us to |
c76acec6 JF |
158 | * receive them. |
159 | */ | |
160 | struct fw_address_handler handler; | |
161 | u64 local_fifo; | |
162 | ||
48553011 SR |
163 | /* Number of tx datagrams that have been queued but not yet acked */ |
164 | int queued_datagrams; | |
c76acec6 | 165 | |
c1671470 | 166 | int peer_count; |
5a124d38 | 167 | struct list_head peer_list; |
c76acec6 | 168 | struct fw_card *card; |
5a124d38 SR |
169 | struct net_device *netdev; |
170 | }; | |
171 | ||
172 | struct fwnet_peer { | |
173 | struct list_head peer_link; | |
174 | struct fwnet_device *dev; | |
175 | u64 guid; | |
5a124d38 SR |
176 | |
177 | /* guarded by dev->lock */ | |
178 | struct list_head pd_list; /* received partial datagrams */ | |
179 | unsigned pdg_size; /* pd_list size */ | |
180 | ||
181 | u16 datagram_label; /* outgoing datagram label */ | |
48553011 | 182 | u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ |
5a124d38 SR |
183 | int node_id; |
184 | int generation; | |
185 | unsigned speed; | |
c76acec6 JF |
186 | }; |
187 | ||
188 | /* This is our task struct. It's used for the packet complete callback. */ | |
f91e3bd8 | 189 | struct fwnet_packet_task { |
c76acec6 | 190 | struct fw_transaction transaction; |
f91e3bd8 | 191 | struct rfc2734_header hdr; |
c76acec6 | 192 | struct sk_buff *skb; |
f91e3bd8 SR |
193 | struct fwnet_device *dev; |
194 | ||
c76acec6 | 195 | int outstanding_pkts; |
c76acec6 JF |
196 | u64 fifo_addr; |
197 | u16 dest_node; | |
48553011 | 198 | u16 max_payload; |
c76acec6 JF |
199 | u8 generation; |
200 | u8 speed; | |
48553011 | 201 | u8 enqueued; |
c76acec6 JF |
202 | }; |
203 | ||
6752c8db YH |
204 | /* |
205 | * Get fifo address embedded in hwaddr | |
206 | */ | |
207 | static __u64 fwnet_hwaddr_fifo(union fwnet_hwaddr *ha) | |
208 | { | |
209 | return (u64)get_unaligned_be16(&ha->uc.fifo_hi) << 32 | |
210 | | get_unaligned_be32(&ha->uc.fifo_lo); | |
211 | } | |
212 | ||
f91e3bd8 SR |
213 | /* |
214 | * saddr == NULL means use device source address. | |
215 | * daddr == NULL means leave destination address (eg unresolved arp). | |
216 | */ | |
217 | static int fwnet_header_create(struct sk_buff *skb, struct net_device *net, | |
218 | unsigned short type, const void *daddr, | |
219 | const void *saddr, unsigned len) | |
220 | { | |
221 | struct fwnet_header *h; | |
c76acec6 | 222 | |
d58ff351 | 223 | h = skb_push(skb, sizeof(*h)); |
f91e3bd8 | 224 | put_unaligned_be16(type, &h->h_proto); |
c76acec6 | 225 | |
f91e3bd8 SR |
226 | if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
227 | memset(h->h_dest, 0, net->addr_len); | |
c76acec6 | 228 | |
f91e3bd8 | 229 | return net->hard_header_len; |
c76acec6 JF |
230 | } |
231 | ||
232 | if (daddr) { | |
f91e3bd8 SR |
233 | memcpy(h->h_dest, daddr, net->addr_len); |
234 | ||
235 | return net->hard_header_len; | |
c76acec6 JF |
236 | } |
237 | ||
f91e3bd8 | 238 | return -net->hard_header_len; |
c76acec6 JF |
239 | } |
240 | ||
f91e3bd8 | 241 | static int fwnet_header_cache(const struct neighbour *neigh, |
e69dd336 | 242 | struct hh_cache *hh, __be16 type) |
f91e3bd8 SR |
243 | { |
244 | struct net_device *net; | |
245 | struct fwnet_header *h; | |
c76acec6 | 246 | |
e69dd336 | 247 | if (type == cpu_to_be16(ETH_P_802_3)) |
c76acec6 | 248 | return -1; |
f91e3bd8 | 249 | net = neigh->dev; |
82586340 | 250 | h = (struct fwnet_header *)((u8 *)hh->hh_data + HH_DATA_OFF(sizeof(*h))); |
e69dd336 | 251 | h->h_proto = type; |
f91e3bd8 | 252 | memcpy(h->h_dest, neigh->ha, net->addr_len); |
c305c6ae ED |
253 | |
254 | /* Pairs with the READ_ONCE() in neigh_resolve_output(), | |
255 | * neigh_hh_output() and neigh_update_hhs(). | |
256 | */ | |
257 | smp_store_release(&hh->hh_len, FWNET_HLEN); | |
c76acec6 | 258 | |
c76acec6 JF |
259 | return 0; |
260 | } | |
261 | ||
262 | /* Called by Address Resolution module to notify changes in address. */ | |
f91e3bd8 SR |
263 | static void fwnet_header_cache_update(struct hh_cache *hh, |
264 | const struct net_device *net, const unsigned char *haddr) | |
265 | { | |
82586340 | 266 | memcpy((u8 *)hh->hh_data + HH_DATA_OFF(FWNET_HLEN), haddr, net->addr_len); |
c76acec6 JF |
267 | } |
268 | ||
f91e3bd8 SR |
269 | static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
270 | { | |
271 | memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN); | |
272 | ||
273 | return FWNET_ALEN; | |
c76acec6 JF |
274 | } |
275 | ||
f91e3bd8 SR |
276 | static const struct header_ops fwnet_header_ops = { |
277 | .create = fwnet_header_create, | |
f91e3bd8 SR |
278 | .cache = fwnet_header_cache, |
279 | .cache_update = fwnet_header_cache_update, | |
280 | .parse = fwnet_header_parse, | |
c76acec6 JF |
281 | }; |
282 | ||
c76acec6 | 283 | /* FIXME: is this correct for all cases? */ |
f91e3bd8 SR |
284 | static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd, |
285 | unsigned offset, unsigned len) | |
c76acec6 | 286 | { |
f91e3bd8 | 287 | struct fwnet_fragment_info *fi; |
c76acec6 JF |
288 | unsigned end = offset + len; |
289 | ||
f91e3bd8 SR |
290 | list_for_each_entry(fi, &pd->fi_list, fi_link) |
291 | if (offset < fi->offset + fi->len && end > fi->offset) | |
c76acec6 | 292 | return true; |
f91e3bd8 | 293 | |
c76acec6 JF |
294 | return false; |
295 | } | |
296 | ||
297 | /* Assumes that new fragment does not overlap any existing fragments */ | |
f91e3bd8 SR |
298 | static struct fwnet_fragment_info *fwnet_frag_new( |
299 | struct fwnet_partial_datagram *pd, unsigned offset, unsigned len) | |
300 | { | |
301 | struct fwnet_fragment_info *fi, *fi2, *new; | |
c76acec6 JF |
302 | struct list_head *list; |
303 | ||
f91e3bd8 SR |
304 | list = &pd->fi_list; |
305 | list_for_each_entry(fi, &pd->fi_list, fi_link) { | |
c76acec6 JF |
306 | if (fi->offset + fi->len == offset) { |
307 | /* The new fragment can be tacked on to the end */ | |
308 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
309 | fi2 = list_entry(fi->fi_link.next, |
310 | struct fwnet_fragment_info, fi_link); | |
c76acec6 | 311 | if (fi->offset + fi->len == fi2->offset) { |
c76acec6 JF |
312 | /* glue fragments together */ |
313 | fi->len += len + fi2->len; | |
f91e3bd8 | 314 | list_del(&fi2->fi_link); |
c76acec6 JF |
315 | kfree(fi2); |
316 | } else { | |
c76acec6 JF |
317 | fi->len += len; |
318 | } | |
f91e3bd8 | 319 | |
c76acec6 JF |
320 | return fi; |
321 | } | |
322 | if (offset + len == fi->offset) { | |
323 | /* The new fragment can be tacked on to the beginning */ | |
324 | /* Did the new fragment plug a hole? */ | |
f91e3bd8 SR |
325 | fi2 = list_entry(fi->fi_link.prev, |
326 | struct fwnet_fragment_info, fi_link); | |
c76acec6 JF |
327 | if (fi2->offset + fi2->len == fi->offset) { |
328 | /* glue fragments together */ | |
c76acec6 | 329 | fi2->len += fi->len + len; |
f91e3bd8 | 330 | list_del(&fi->fi_link); |
c76acec6 | 331 | kfree(fi); |
f91e3bd8 | 332 | |
c76acec6 JF |
333 | return fi2; |
334 | } | |
c76acec6 JF |
335 | fi->offset = offset; |
336 | fi->len += len; | |
f91e3bd8 | 337 | |
c76acec6 JF |
338 | return fi; |
339 | } | |
340 | if (offset > fi->offset + fi->len) { | |
f91e3bd8 | 341 | list = &fi->fi_link; |
c76acec6 JF |
342 | break; |
343 | } | |
344 | if (offset + len < fi->offset) { | |
f91e3bd8 | 345 | list = fi->fi_link.prev; |
c76acec6 JF |
346 | break; |
347 | } | |
348 | } | |
349 | ||
350 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
cfb0c9d1 | 351 | if (!new) |
c76acec6 | 352 | return NULL; |
c76acec6 JF |
353 | |
354 | new->offset = offset; | |
355 | new->len = len; | |
f91e3bd8 SR |
356 | list_add(&new->fi_link, list); |
357 | ||
c76acec6 JF |
358 | return new; |
359 | } | |
360 | ||
f91e3bd8 SR |
361 | static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net, |
362 | struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size, | |
363 | void *frag_buf, unsigned frag_off, unsigned frag_len) | |
364 | { | |
365 | struct fwnet_partial_datagram *new; | |
366 | struct fwnet_fragment_info *fi; | |
c76acec6 JF |
367 | |
368 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
369 | if (!new) | |
370 | goto fail; | |
f91e3bd8 SR |
371 | |
372 | INIT_LIST_HEAD(&new->fi_list); | |
373 | fi = fwnet_frag_new(new, frag_off, frag_len); | |
374 | if (fi == NULL) | |
c76acec6 | 375 | goto fail_w_new; |
f91e3bd8 | 376 | |
c76acec6 JF |
377 | new->datagram_label = datagram_label; |
378 | new->datagram_size = dg_size; | |
82586340 | 379 | new->skb = dev_alloc_skb(dg_size + LL_RESERVED_SPACE(net)); |
f91e3bd8 | 380 | if (new->skb == NULL) |
c76acec6 | 381 | goto fail_w_fi; |
f91e3bd8 | 382 | |
82586340 | 383 | skb_reserve(new->skb, LL_RESERVED_SPACE(net)); |
c76acec6 JF |
384 | new->pbuf = skb_put(new->skb, dg_size); |
385 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
f91e3bd8 SR |
386 | list_add_tail(&new->pd_link, &peer->pd_list); |
387 | ||
c76acec6 JF |
388 | return new; |
389 | ||
390 | fail_w_fi: | |
391 | kfree(fi); | |
392 | fail_w_new: | |
393 | kfree(new); | |
394 | fail: | |
c76acec6 JF |
395 | return NULL; |
396 | } | |
397 | ||
f91e3bd8 SR |
398 | static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer, |
399 | u16 datagram_label) | |
400 | { | |
401 | struct fwnet_partial_datagram *pd; | |
c76acec6 | 402 | |
f91e3bd8 SR |
403 | list_for_each_entry(pd, &peer->pd_list, pd_link) |
404 | if (pd->datagram_label == datagram_label) | |
c76acec6 | 405 | return pd; |
f91e3bd8 | 406 | |
c76acec6 JF |
407 | return NULL; |
408 | } | |
409 | ||
410 | ||
f91e3bd8 SR |
411 | static void fwnet_pd_delete(struct fwnet_partial_datagram *old) |
412 | { | |
413 | struct fwnet_fragment_info *fi, *n; | |
c76acec6 | 414 | |
f91e3bd8 | 415 | list_for_each_entry_safe(fi, n, &old->fi_list, fi_link) |
c76acec6 | 416 | kfree(fi); |
f91e3bd8 SR |
417 | |
418 | list_del(&old->pd_link); | |
c76acec6 JF |
419 | dev_kfree_skb_any(old->skb); |
420 | kfree(old); | |
421 | } | |
422 | ||
f91e3bd8 SR |
423 | static bool fwnet_pd_update(struct fwnet_peer *peer, |
424 | struct fwnet_partial_datagram *pd, void *frag_buf, | |
425 | unsigned frag_off, unsigned frag_len) | |
426 | { | |
427 | if (fwnet_frag_new(pd, frag_off, frag_len) == NULL) | |
c76acec6 | 428 | return false; |
f91e3bd8 | 429 | |
c76acec6 JF |
430 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
431 | ||
432 | /* | |
25985edc | 433 | * Move list entry to beginning of list so that oldest partial |
c76acec6 JF |
434 | * datagrams percolate to the end of the list |
435 | */ | |
f91e3bd8 SR |
436 | list_move_tail(&pd->pd_link, &peer->pd_list); |
437 | ||
c76acec6 JF |
438 | return true; |
439 | } | |
440 | ||
f91e3bd8 SR |
441 | static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd) |
442 | { | |
443 | struct fwnet_fragment_info *fi; | |
c76acec6 | 444 | |
f91e3bd8 | 445 | fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link); |
c76acec6 | 446 | |
f91e3bd8 | 447 | return fi->len == pd->datagram_size; |
c76acec6 JF |
448 | } |
449 | ||
5a124d38 | 450 | /* caller must hold dev->lock */ |
f91e3bd8 SR |
451 | static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev, |
452 | u64 guid) | |
453 | { | |
5a124d38 | 454 | struct fwnet_peer *peer; |
c76acec6 | 455 | |
5a124d38 SR |
456 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
457 | if (peer->guid == guid) | |
458 | return peer; | |
c76acec6 | 459 | |
5a124d38 | 460 | return NULL; |
c76acec6 JF |
461 | } |
462 | ||
5a124d38 | 463 | /* caller must hold dev->lock */ |
f91e3bd8 | 464 | static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev, |
5a124d38 | 465 | int node_id, int generation) |
f91e3bd8 | 466 | { |
5a124d38 | 467 | struct fwnet_peer *peer; |
c76acec6 | 468 | |
5a124d38 SR |
469 | list_for_each_entry(peer, &dev->peer_list, peer_link) |
470 | if (peer->node_id == node_id && | |
471 | peer->generation == generation) | |
472 | return peer; | |
f91e3bd8 | 473 | |
5a124d38 | 474 | return NULL; |
c76acec6 JF |
475 | } |
476 | ||
5a124d38 SR |
477 | /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */ |
478 | static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed) | |
f91e3bd8 | 479 | { |
5a124d38 | 480 | max_rec = min(max_rec, speed + 8); |
4ec4a67a | 481 | max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */ |
5a124d38 SR |
482 | |
483 | return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; | |
c76acec6 JF |
484 | } |
485 | ||
5a124d38 | 486 | |
f91e3bd8 SR |
487 | static int fwnet_finish_incoming_packet(struct net_device *net, |
488 | struct sk_buff *skb, u16 source_node_id, | |
489 | bool is_broadcast, u16 ether_type) | |
490 | { | |
c76acec6 | 491 | int status; |
c76acec6 | 492 | |
18406d7e YH |
493 | switch (ether_type) { |
494 | case ETH_P_ARP: | |
495 | case ETH_P_IP: | |
cb6bf355 YH |
496 | #if IS_ENABLED(CONFIG_IPV6) |
497 | case ETH_P_IPV6: | |
498 | #endif | |
18406d7e YH |
499 | break; |
500 | default: | |
501 | goto err; | |
502 | } | |
503 | ||
c76acec6 | 504 | /* Write metadata, and then pass to the receive level */ |
f91e3bd8 | 505 | skb->dev = net; |
b577d7e2 | 506 | skb->ip_summed = CHECKSUM_NONE; |
c76acec6 JF |
507 | |
508 | /* | |
509 | * Parse the encapsulation header. This actually does the job of | |
6752c8db | 510 | * converting to an ethernet-like pseudo frame header. |
c76acec6 | 511 | */ |
f91e3bd8 | 512 | if (dev_hard_header(skb, net, ether_type, |
6752c8db | 513 | is_broadcast ? net->broadcast : net->dev_addr, |
f91e3bd8 SR |
514 | NULL, skb->len) >= 0) { |
515 | struct fwnet_header *eth; | |
c76acec6 JF |
516 | u16 *rawp; |
517 | __be16 protocol; | |
518 | ||
519 | skb_reset_mac_header(skb); | |
520 | skb_pull(skb, sizeof(*eth)); | |
f91e3bd8 | 521 | eth = (struct fwnet_header *)skb_mac_header(skb); |
021b97e4 | 522 | if (fwnet_hwaddr_is_multicast(eth->h_dest)) { |
f91e3bd8 SR |
523 | if (memcmp(eth->h_dest, net->broadcast, |
524 | net->addr_len) == 0) | |
c76acec6 | 525 | skb->pkt_type = PACKET_BROADCAST; |
c76acec6 JF |
526 | #if 0 |
527 | else | |
528 | skb->pkt_type = PACKET_MULTICAST; | |
529 | #endif | |
530 | } else { | |
156ce867 | 531 | if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) |
c76acec6 | 532 | skb->pkt_type = PACKET_OTHERHOST; |
c76acec6 | 533 | } |
e5c5d22e | 534 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) { |
c76acec6 JF |
535 | protocol = eth->h_proto; |
536 | } else { | |
537 | rawp = (u16 *)skb->data; | |
f91e3bd8 | 538 | if (*rawp == 0xffff) |
c76acec6 | 539 | protocol = htons(ETH_P_802_3); |
f91e3bd8 | 540 | else |
c76acec6 | 541 | protocol = htons(ETH_P_802_2); |
c76acec6 JF |
542 | } |
543 | skb->protocol = protocol; | |
544 | } | |
545 | status = netif_rx(skb); | |
f91e3bd8 SR |
546 | if (status == NET_RX_DROP) { |
547 | net->stats.rx_errors++; | |
548 | net->stats.rx_dropped++; | |
c76acec6 | 549 | } else { |
f91e3bd8 SR |
550 | net->stats.rx_packets++; |
551 | net->stats.rx_bytes += skb->len; | |
c76acec6 | 552 | } |
f91e3bd8 | 553 | |
c76acec6 JF |
554 | return 0; |
555 | ||
18406d7e | 556 | err: |
f91e3bd8 SR |
557 | net->stats.rx_errors++; |
558 | net->stats.rx_dropped++; | |
559 | ||
c76acec6 | 560 | dev_kfree_skb_any(skb); |
f91e3bd8 | 561 | |
1bf145fe | 562 | return -ENOENT; |
c76acec6 JF |
563 | } |
564 | ||
f91e3bd8 | 565 | static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, |
5a124d38 SR |
566 | int source_node_id, int generation, |
567 | bool is_broadcast) | |
f91e3bd8 | 568 | { |
c76acec6 | 569 | struct sk_buff *skb; |
5a124d38 | 570 | struct net_device *net = dev->netdev; |
f91e3bd8 | 571 | struct rfc2734_header hdr; |
c76acec6 JF |
572 | unsigned lf; |
573 | unsigned long flags; | |
f91e3bd8 SR |
574 | struct fwnet_peer *peer; |
575 | struct fwnet_partial_datagram *pd; | |
c76acec6 JF |
576 | int fg_off; |
577 | int dg_size; | |
578 | u16 datagram_label; | |
579 | int retval; | |
580 | u16 ether_type; | |
581 | ||
667121ac SR |
582 | if (len <= RFC2374_UNFRAG_HDR_SIZE) |
583 | return 0; | |
584 | ||
f91e3bd8 SR |
585 | hdr.w0 = be32_to_cpu(buf[0]); |
586 | lf = fwnet_get_hdr_lf(&hdr); | |
587 | if (lf == RFC2374_HDR_UNFRAG) { | |
c76acec6 JF |
588 | /* |
589 | * An unfragmented datagram has been received by the ieee1394 | |
590 | * bus. Build an skbuff around it so we can pass it to the | |
591 | * high level network layer. | |
592 | */ | |
f91e3bd8 | 593 | ether_type = fwnet_get_hdr_ether_type(&hdr); |
c76acec6 | 594 | buf++; |
f91e3bd8 | 595 | len -= RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 | 596 | |
82586340 | 597 | skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net)); |
c76acec6 | 598 | if (unlikely(!skb)) { |
f91e3bd8 SR |
599 | net->stats.rx_dropped++; |
600 | ||
1bf145fe | 601 | return -ENOMEM; |
c76acec6 | 602 | } |
82586340 | 603 | skb_reserve(skb, LL_RESERVED_SPACE(net)); |
59ae1d12 | 604 | skb_put_data(skb, buf, len); |
f91e3bd8 SR |
605 | |
606 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
607 | is_broadcast, ether_type); | |
c76acec6 | 608 | } |
667121ac | 609 | |
c76acec6 | 610 | /* A datagram fragment has been received, now the fun begins. */ |
667121ac SR |
611 | |
612 | if (len <= RFC2374_FRAG_HDR_SIZE) | |
613 | return 0; | |
614 | ||
c76acec6 | 615 | hdr.w1 = ntohl(buf[1]); |
f91e3bd8 SR |
616 | buf += 2; |
617 | len -= RFC2374_FRAG_HDR_SIZE; | |
618 | if (lf == RFC2374_HDR_FIRSTFRAG) { | |
619 | ether_type = fwnet_get_hdr_ether_type(&hdr); | |
c76acec6 JF |
620 | fg_off = 0; |
621 | } else { | |
f91e3bd8 SR |
622 | ether_type = 0; |
623 | fg_off = fwnet_get_hdr_fg_off(&hdr); | |
c76acec6 | 624 | } |
f91e3bd8 | 625 | datagram_label = fwnet_get_hdr_dgl(&hdr); |
e9300a4b | 626 | dg_size = fwnet_get_hdr_dg_size(&hdr); |
f91e3bd8 | 627 | |
667121ac SR |
628 | if (fg_off + len > dg_size) |
629 | return 0; | |
f91e3bd8 | 630 | |
5a124d38 SR |
631 | spin_lock_irqsave(&dev->lock, flags); |
632 | ||
633 | peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); | |
1bf145fe SR |
634 | if (!peer) { |
635 | retval = -ENOENT; | |
636 | goto fail; | |
637 | } | |
f91e3bd8 SR |
638 | |
639 | pd = fwnet_pd_find(peer, datagram_label); | |
c76acec6 | 640 | if (pd == NULL) { |
f91e3bd8 | 641 | while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { |
c76acec6 | 642 | /* remove the oldest */ |
f91e3bd8 SR |
643 | fwnet_pd_delete(list_first_entry(&peer->pd_list, |
644 | struct fwnet_partial_datagram, pd_link)); | |
645 | peer->pdg_size--; | |
c76acec6 | 646 | } |
f91e3bd8 SR |
647 | pd = fwnet_pd_new(net, peer, datagram_label, |
648 | dg_size, buf, fg_off, len); | |
649 | if (pd == NULL) { | |
c76acec6 | 650 | retval = -ENOMEM; |
1bf145fe | 651 | goto fail; |
c76acec6 | 652 | } |
f91e3bd8 | 653 | peer->pdg_size++; |
c76acec6 | 654 | } else { |
f91e3bd8 SR |
655 | if (fwnet_frag_overlap(pd, fg_off, len) || |
656 | pd->datagram_size != dg_size) { | |
c76acec6 JF |
657 | /* |
658 | * Differing datagram sizes or overlapping fragments, | |
f91e3bd8 | 659 | * discard old datagram and start a new one. |
c76acec6 | 660 | */ |
f91e3bd8 SR |
661 | fwnet_pd_delete(pd); |
662 | pd = fwnet_pd_new(net, peer, datagram_label, | |
663 | dg_size, buf, fg_off, len); | |
664 | if (pd == NULL) { | |
f91e3bd8 | 665 | peer->pdg_size--; |
1bf145fe SR |
666 | retval = -ENOMEM; |
667 | goto fail; | |
c76acec6 JF |
668 | } |
669 | } else { | |
f91e3bd8 | 670 | if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { |
c76acec6 JF |
671 | /* |
672 | * Couldn't save off fragment anyway | |
673 | * so might as well obliterate the | |
674 | * datagram now. | |
675 | */ | |
f91e3bd8 SR |
676 | fwnet_pd_delete(pd); |
677 | peer->pdg_size--; | |
1bf145fe SR |
678 | retval = -ENOMEM; |
679 | goto fail; | |
c76acec6 JF |
680 | } |
681 | } | |
682 | } /* new datagram or add to existing one */ | |
683 | ||
f91e3bd8 | 684 | if (lf == RFC2374_HDR_FIRSTFRAG) |
c76acec6 | 685 | pd->ether_type = ether_type; |
f91e3bd8 SR |
686 | |
687 | if (fwnet_pd_is_complete(pd)) { | |
c76acec6 | 688 | ether_type = pd->ether_type; |
f91e3bd8 | 689 | peer->pdg_size--; |
c76acec6 | 690 | skb = skb_get(pd->skb); |
f91e3bd8 SR |
691 | fwnet_pd_delete(pd); |
692 | ||
5a124d38 | 693 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 SR |
694 | |
695 | return fwnet_finish_incoming_packet(net, skb, source_node_id, | |
696 | false, ether_type); | |
c76acec6 JF |
697 | } |
698 | /* | |
699 | * Datagram is not complete, we're done for the | |
700 | * moment. | |
701 | */ | |
b2268830 | 702 | retval = 0; |
1bf145fe | 703 | fail: |
5a124d38 | 704 | spin_unlock_irqrestore(&dev->lock, flags); |
f91e3bd8 | 705 | |
1bf145fe | 706 | return retval; |
c76acec6 JF |
707 | } |
708 | ||
f91e3bd8 SR |
709 | static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |
710 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
711 | unsigned long long offset, void *payload, size_t length, |
712 | void *callback_data) | |
f91e3bd8 | 713 | { |
00635b8e SR |
714 | struct fwnet_device *dev = callback_data; |
715 | int rcode; | |
c76acec6 | 716 | |
00635b8e SR |
717 | if (destination == IEEE1394_ALL_NODES) { |
718 | kfree(r); | |
f91e3bd8 | 719 | |
c76acec6 JF |
720 | return; |
721 | } | |
f91e3bd8 | 722 | |
00635b8e SR |
723 | if (offset != dev->handler.offset) |
724 | rcode = RCODE_ADDRESS_ERROR; | |
725 | else if (tcode != TCODE_WRITE_BLOCK_REQUEST) | |
726 | rcode = RCODE_TYPE_ERROR; | |
727 | else if (fwnet_incoming_packet(dev, payload, length, | |
728 | source, generation, false) != 0) { | |
8408dc1c | 729 | dev_err(&dev->netdev->dev, "incoming packet failure\n"); |
00635b8e SR |
730 | rcode = RCODE_CONFLICT_ERROR; |
731 | } else | |
732 | rcode = RCODE_COMPLETE; | |
f91e3bd8 | 733 | |
00635b8e | 734 | fw_send_response(card, r, rcode); |
c76acec6 JF |
735 | } |
736 | ||
667121ac SR |
737 | static int gasp_source_id(__be32 *p) |
738 | { | |
739 | return be32_to_cpu(p[0]) >> 16; | |
740 | } | |
741 | ||
742 | static u32 gasp_specifier_id(__be32 *p) | |
743 | { | |
744 | return (be32_to_cpu(p[0]) & 0xffff) << 8 | | |
745 | (be32_to_cpu(p[1]) & 0xff000000) >> 24; | |
746 | } | |
747 | ||
748 | static u32 gasp_version(__be32 *p) | |
749 | { | |
750 | return be32_to_cpu(p[1]) & 0xffffff; | |
751 | } | |
752 | ||
f91e3bd8 SR |
753 | static void fwnet_receive_broadcast(struct fw_iso_context *context, |
754 | u32 cycle, size_t header_length, void *header, void *data) | |
755 | { | |
756 | struct fwnet_device *dev; | |
c76acec6 | 757 | struct fw_iso_packet packet; |
f91e3bd8 SR |
758 | __be16 *hdr_ptr; |
759 | __be32 *buf_ptr; | |
c76acec6 JF |
760 | int retval; |
761 | u32 length; | |
c76acec6 JF |
762 | unsigned long offset; |
763 | unsigned long flags; | |
764 | ||
f91e3bd8 | 765 | dev = data; |
c76acec6 | 766 | hdr_ptr = header; |
f91e3bd8 SR |
767 | length = be16_to_cpup(hdr_ptr); |
768 | ||
769 | spin_lock_irqsave(&dev->lock, flags); | |
770 | ||
771 | offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; | |
772 | buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; | |
773 | if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) | |
774 | dev->broadcast_rcv_next_ptr = 0; | |
775 | ||
776 | spin_unlock_irqrestore(&dev->lock, flags); | |
c76acec6 | 777 | |
667121ac SR |
778 | if (length > IEEE1394_GASP_HDR_SIZE && |
779 | gasp_specifier_id(buf_ptr) == IANA_SPECIFIER_ID && | |
780 | (gasp_version(buf_ptr) == RFC2734_SW_VERSION | |
cb6bf355 | 781 | #if IS_ENABLED(CONFIG_IPV6) |
667121ac | 782 | || gasp_version(buf_ptr) == RFC3146_SW_VERSION |
cb6bf355 | 783 | #endif |
667121ac SR |
784 | )) |
785 | fwnet_incoming_packet(dev, buf_ptr + 2, | |
786 | length - IEEE1394_GASP_HDR_SIZE, | |
787 | gasp_source_id(buf_ptr), | |
9d237342 | 788 | context->card->generation, true); |
f91e3bd8 SR |
789 | |
790 | packet.payload_length = dev->rcv_buffer_size; | |
c76acec6 JF |
791 | packet.interrupt = 1; |
792 | packet.skip = 0; | |
793 | packet.tag = 3; | |
794 | packet.sy = 0; | |
f91e3bd8 SR |
795 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
796 | ||
797 | spin_lock_irqsave(&dev->lock, flags); | |
c76acec6 | 798 | |
f91e3bd8 SR |
799 | retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, |
800 | &dev->broadcast_rcv_buffer, offset); | |
801 | ||
802 | spin_unlock_irqrestore(&dev->lock, flags); | |
803 | ||
13882a82 CL |
804 | if (retval >= 0) |
805 | fw_iso_context_queue_flush(dev->broadcast_rcv_context); | |
806 | else | |
8408dc1c | 807 | dev_err(&dev->netdev->dev, "requeue failed\n"); |
c76acec6 JF |
808 | } |
809 | ||
f91e3bd8 SR |
810 | static struct kmem_cache *fwnet_packet_task_cache; |
811 | ||
110f82d7 SR |
812 | static void fwnet_free_ptask(struct fwnet_packet_task *ptask) |
813 | { | |
814 | dev_kfree_skb_any(ptask->skb); | |
815 | kmem_cache_free(fwnet_packet_task_cache, ptask); | |
816 | } | |
817 | ||
b2268830 SR |
818 | /* Caller must hold dev->lock. */ |
819 | static void dec_queued_datagrams(struct fwnet_device *dev) | |
820 | { | |
821 | if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS) | |
822 | netif_wake_queue(dev->netdev); | |
823 | } | |
824 | ||
f91e3bd8 SR |
825 | static int fwnet_send_packet(struct fwnet_packet_task *ptask); |
826 | ||
827 | static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) | |
828 | { | |
110f82d7 | 829 | struct fwnet_device *dev = ptask->dev; |
902bca00 | 830 | struct sk_buff *skb = ptask->skb; |
c76acec6 | 831 | unsigned long flags; |
110f82d7 | 832 | bool free; |
f91e3bd8 SR |
833 | |
834 | spin_lock_irqsave(&dev->lock, flags); | |
f91e3bd8 | 835 | |
110f82d7 SR |
836 | ptask->outstanding_pkts--; |
837 | ||
838 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 839 | free = (ptask->outstanding_pkts == 0 && ptask->enqueued); |
7ee11fa8 | 840 | if (free) |
b2268830 | 841 | dec_queued_datagrams(dev); |
110f82d7 | 842 | |
902bca00 | 843 | if (ptask->outstanding_pkts == 0) { |
902bca00 SR |
844 | dev->netdev->stats.tx_packets++; |
845 | dev->netdev->stats.tx_bytes += skb->len; | |
846 | } | |
110f82d7 SR |
847 | |
848 | spin_unlock_irqrestore(&dev->lock, flags); | |
f91e3bd8 SR |
849 | |
850 | if (ptask->outstanding_pkts > 0) { | |
c76acec6 JF |
851 | u16 dg_size; |
852 | u16 fg_off; | |
853 | u16 datagram_label; | |
854 | u16 lf; | |
c76acec6 JF |
855 | |
856 | /* Update the ptask to point to the next fragment and send it */ | |
f91e3bd8 | 857 | lf = fwnet_get_hdr_lf(&ptask->hdr); |
c76acec6 | 858 | switch (lf) { |
f91e3bd8 SR |
859 | case RFC2374_HDR_LASTFRAG: |
860 | case RFC2374_HDR_UNFRAG: | |
c76acec6 | 861 | default: |
8408dc1c SR |
862 | dev_err(&dev->netdev->dev, |
863 | "outstanding packet %x lf %x, header %x,%x\n", | |
864 | ptask->outstanding_pkts, lf, ptask->hdr.w0, | |
865 | ptask->hdr.w1); | |
c76acec6 JF |
866 | BUG(); |
867 | ||
f91e3bd8 | 868 | case RFC2374_HDR_FIRSTFRAG: |
c76acec6 | 869 | /* Set frag type here for future interior fragments */ |
f91e3bd8 SR |
870 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); |
871 | fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
872 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
873 | break; |
874 | ||
f91e3bd8 SR |
875 | case RFC2374_HDR_INTFRAG: |
876 | dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); | |
877 | fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) | |
878 | + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; | |
879 | datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); | |
c76acec6 JF |
880 | break; |
881 | } | |
902bca00 | 882 | |
9d237342 SG |
883 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
884 | skb_pull(skb, | |
885 | ptask->max_payload + IEEE1394_GASP_HDR_SIZE); | |
886 | } else { | |
887 | skb_pull(skb, ptask->max_payload); | |
888 | } | |
f91e3bd8 SR |
889 | if (ptask->outstanding_pkts > 1) { |
890 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, | |
891 | dg_size, fg_off, datagram_label); | |
c76acec6 | 892 | } else { |
f91e3bd8 SR |
893 | fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, |
894 | dg_size, fg_off, datagram_label); | |
895 | ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; | |
c76acec6 | 896 | } |
f91e3bd8 | 897 | fwnet_send_packet(ptask); |
c76acec6 | 898 | } |
110f82d7 SR |
899 | |
900 | if (free) | |
901 | fwnet_free_ptask(ptask); | |
c76acec6 JF |
902 | } |
903 | ||
7ee11fa8 SR |
904 | static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask) |
905 | { | |
906 | struct fwnet_device *dev = ptask->dev; | |
907 | unsigned long flags; | |
908 | bool free; | |
909 | ||
910 | spin_lock_irqsave(&dev->lock, flags); | |
911 | ||
912 | /* One fragment failed; don't try to send remaining fragments. */ | |
913 | ptask->outstanding_pkts = 0; | |
914 | ||
915 | /* Check whether we or the networking TX soft-IRQ is last user. */ | |
48553011 | 916 | free = ptask->enqueued; |
7ee11fa8 | 917 | if (free) |
b2268830 | 918 | dec_queued_datagrams(dev); |
7ee11fa8 SR |
919 | |
920 | dev->netdev->stats.tx_dropped++; | |
921 | dev->netdev->stats.tx_errors++; | |
922 | ||
923 | spin_unlock_irqrestore(&dev->lock, flags); | |
924 | ||
925 | if (free) | |
926 | fwnet_free_ptask(ptask); | |
927 | } | |
928 | ||
f91e3bd8 SR |
929 | static void fwnet_write_complete(struct fw_card *card, int rcode, |
930 | void *payload, size_t length, void *data) | |
931 | { | |
c4d6fd40 ML |
932 | struct fwnet_packet_task *ptask = data; |
933 | static unsigned long j; | |
934 | static int last_rcode, errors_skipped; | |
c76acec6 | 935 | |
7ee11fa8 | 936 | if (rcode == RCODE_COMPLETE) { |
f91e3bd8 | 937 | fwnet_transmit_packet_done(ptask); |
7ee11fa8 | 938 | } else { |
c4d6fd40 | 939 | if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) { |
8408dc1c SR |
940 | dev_err(&ptask->dev->netdev->dev, |
941 | "fwnet_write_complete failed: %x (skipped %d)\n", | |
942 | rcode, errors_skipped); | |
c4d6fd40 ML |
943 | |
944 | errors_skipped = 0; | |
945 | last_rcode = rcode; | |
89875833 | 946 | } else { |
c4d6fd40 | 947 | errors_skipped++; |
89875833 SR |
948 | } |
949 | fwnet_transmit_packet_failed(ptask); | |
7ee11fa8 | 950 | } |
c76acec6 JF |
951 | } |
952 | ||
f91e3bd8 SR |
953 | static int fwnet_send_packet(struct fwnet_packet_task *ptask) |
954 | { | |
955 | struct fwnet_device *dev; | |
c76acec6 | 956 | unsigned tx_len; |
f91e3bd8 | 957 | struct rfc2734_header *bufhdr; |
c76acec6 | 958 | unsigned long flags; |
110f82d7 | 959 | bool free; |
c76acec6 | 960 | |
f91e3bd8 | 961 | dev = ptask->dev; |
c76acec6 | 962 | tx_len = ptask->max_payload; |
f91e3bd8 SR |
963 | switch (fwnet_get_hdr_lf(&ptask->hdr)) { |
964 | case RFC2374_HDR_UNFRAG: | |
d58ff351 | 965 | bufhdr = skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); |
f91e3bd8 | 966 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); |
c76acec6 JF |
967 | break; |
968 | ||
f91e3bd8 SR |
969 | case RFC2374_HDR_FIRSTFRAG: |
970 | case RFC2374_HDR_INTFRAG: | |
971 | case RFC2374_HDR_LASTFRAG: | |
d58ff351 | 972 | bufhdr = skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); |
f91e3bd8 SR |
973 | put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); |
974 | put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); | |
c76acec6 JF |
975 | break; |
976 | ||
977 | default: | |
978 | BUG(); | |
979 | } | |
f91e3bd8 SR |
980 | if (ptask->dest_node == IEEE1394_ALL_NODES) { |
981 | u8 *p; | |
c76acec6 | 982 | int generation; |
f91e3bd8 | 983 | int node_id; |
cb6bf355 | 984 | unsigned int sw_version; |
c76acec6 JF |
985 | |
986 | /* ptask->generation may not have been set yet */ | |
f91e3bd8 | 987 | generation = dev->card->generation; |
c76acec6 | 988 | smp_rmb(); |
f91e3bd8 SR |
989 | node_id = dev->card->node_id; |
990 | ||
cb6bf355 YH |
991 | switch (ptask->skb->protocol) { |
992 | default: | |
993 | sw_version = RFC2734_SW_VERSION; | |
994 | break; | |
995 | #if IS_ENABLED(CONFIG_IPV6) | |
996 | case htons(ETH_P_IPV6): | |
997 | sw_version = RFC3146_SW_VERSION; | |
998 | #endif | |
999 | } | |
1000 | ||
9d237342 | 1001 | p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE); |
f91e3bd8 SR |
1002 | put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); |
1003 | put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 | |
cb6bf355 | 1004 | | sw_version, &p[4]); |
f91e3bd8 SR |
1005 | |
1006 | /* We should not transmit if broadcast_channel.valid == 0. */ | |
1007 | fw_send_request(dev->card, &ptask->transaction, | |
1008 | TCODE_STREAM_DATA, | |
1009 | fw_stream_packet_destination_id(3, | |
1010 | IEEE1394_BROADCAST_CHANNEL, 0), | |
1011 | generation, SCODE_100, 0ULL, ptask->skb->data, | |
1012 | tx_len + 8, fwnet_write_complete, ptask); | |
1013 | ||
f91e3bd8 | 1014 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1015 | |
1016 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1017 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1018 | if (!free) |
48553011 SR |
1019 | ptask->enqueued = true; |
1020 | else | |
b2268830 | 1021 | dec_queued_datagrams(dev); |
110f82d7 | 1022 | |
f91e3bd8 SR |
1023 | spin_unlock_irqrestore(&dev->lock, flags); |
1024 | ||
110f82d7 | 1025 | goto out; |
c76acec6 | 1026 | } |
f91e3bd8 SR |
1027 | |
1028 | fw_send_request(dev->card, &ptask->transaction, | |
1029 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, | |
1030 | ptask->generation, ptask->speed, ptask->fifo_addr, | |
1031 | ptask->skb->data, tx_len, fwnet_write_complete, ptask); | |
1032 | ||
f91e3bd8 | 1033 | spin_lock_irqsave(&dev->lock, flags); |
110f82d7 SR |
1034 | |
1035 | /* If the AT tasklet already ran, we may be last user. */ | |
48553011 | 1036 | free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); |
110f82d7 | 1037 | if (!free) |
48553011 SR |
1038 | ptask->enqueued = true; |
1039 | else | |
b2268830 | 1040 | dec_queued_datagrams(dev); |
110f82d7 | 1041 | |
f91e3bd8 SR |
1042 | spin_unlock_irqrestore(&dev->lock, flags); |
1043 | ||
860e9538 | 1044 | netif_trans_update(dev->netdev); |
110f82d7 SR |
1045 | out: |
1046 | if (free) | |
1047 | fwnet_free_ptask(ptask); | |
f91e3bd8 | 1048 | |
c76acec6 JF |
1049 | return 0; |
1050 | } | |
1051 | ||
9d39c90a YH |
1052 | static void fwnet_fifo_stop(struct fwnet_device *dev) |
1053 | { | |
1054 | if (dev->local_fifo == FWNET_NO_FIFO_ADDR) | |
1055 | return; | |
1056 | ||
1057 | fw_core_remove_address_handler(&dev->handler); | |
1058 | dev->local_fifo = FWNET_NO_FIFO_ADDR; | |
1059 | } | |
1060 | ||
1061 | static int fwnet_fifo_start(struct fwnet_device *dev) | |
1062 | { | |
1063 | int retval; | |
1064 | ||
1065 | if (dev->local_fifo != FWNET_NO_FIFO_ADDR) | |
1066 | return 0; | |
1067 | ||
1068 | dev->handler.length = 4096; | |
1069 | dev->handler.address_callback = fwnet_receive_packet; | |
1070 | dev->handler.callback_data = dev; | |
1071 | ||
1072 | retval = fw_core_add_address_handler(&dev->handler, | |
1073 | &fw_high_memory_region); | |
1074 | if (retval < 0) | |
1075 | return retval; | |
1076 | ||
1077 | dev->local_fifo = dev->handler.offset; | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
111534cd YH |
1082 | static void __fwnet_broadcast_stop(struct fwnet_device *dev) |
1083 | { | |
1084 | unsigned u; | |
1085 | ||
1086 | if (dev->broadcast_state != FWNET_BROADCAST_ERROR) { | |
1087 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) | |
1088 | kunmap(dev->broadcast_rcv_buffer.pages[u]); | |
1089 | fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); | |
1090 | } | |
1091 | if (dev->broadcast_rcv_context) { | |
1092 | fw_iso_context_destroy(dev->broadcast_rcv_context); | |
1093 | dev->broadcast_rcv_context = NULL; | |
1094 | } | |
1095 | kfree(dev->broadcast_rcv_buffer_ptrs); | |
1096 | dev->broadcast_rcv_buffer_ptrs = NULL; | |
1097 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1098 | } | |
1099 | ||
1100 | static void fwnet_broadcast_stop(struct fwnet_device *dev) | |
1101 | { | |
1102 | if (dev->broadcast_state == FWNET_BROADCAST_ERROR) | |
1103 | return; | |
1104 | fw_iso_context_stop(dev->broadcast_rcv_context); | |
1105 | __fwnet_broadcast_stop(dev); | |
1106 | } | |
1107 | ||
f91e3bd8 SR |
1108 | static int fwnet_broadcast_start(struct fwnet_device *dev) |
1109 | { | |
c76acec6 JF |
1110 | struct fw_iso_context *context; |
1111 | int retval; | |
1112 | unsigned num_packets; | |
1113 | unsigned max_receive; | |
1114 | struct fw_iso_packet packet; | |
1115 | unsigned long offset; | |
f2090594 | 1116 | void **ptrptr; |
c76acec6 | 1117 | unsigned u; |
c76acec6 | 1118 | |
2fbd8dfe YH |
1119 | if (dev->broadcast_state != FWNET_BROADCAST_ERROR) |
1120 | return 0; | |
1121 | ||
f91e3bd8 SR |
1122 | max_receive = 1U << (dev->card->max_receive + 1); |
1123 | num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; | |
1124 | ||
6da2ec56 | 1125 | ptrptr = kmalloc_array(num_packets, sizeof(void *), GFP_KERNEL); |
eac31d58 YH |
1126 | if (!ptrptr) { |
1127 | retval = -ENOMEM; | |
111534cd | 1128 | goto failed; |
eac31d58 YH |
1129 | } |
1130 | dev->broadcast_rcv_buffer_ptrs = ptrptr; | |
1131 | ||
f2090594 YH |
1132 | context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE, |
1133 | IEEE1394_BROADCAST_CHANNEL, | |
1134 | dev->card->link_speed, 8, | |
1135 | fwnet_receive_broadcast, dev); | |
1136 | if (IS_ERR(context)) { | |
1137 | retval = PTR_ERR(context); | |
111534cd | 1138 | goto failed; |
f2090594 | 1139 | } |
f91e3bd8 | 1140 | |
f2090594 YH |
1141 | retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card, |
1142 | FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); | |
1143 | if (retval < 0) | |
111534cd YH |
1144 | goto failed; |
1145 | ||
1146 | dev->broadcast_state = FWNET_BROADCAST_STOPPED; | |
f91e3bd8 | 1147 | |
f2090594 YH |
1148 | for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { |
1149 | void *ptr; | |
1150 | unsigned v; | |
c76acec6 | 1151 | |
f2090594 YH |
1152 | ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); |
1153 | for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) | |
1154 | *ptrptr++ = (void *) ((char *)ptr + v * max_receive); | |
f91e3bd8 | 1155 | } |
f2090594 | 1156 | dev->broadcast_rcv_context = context; |
c76acec6 JF |
1157 | |
1158 | packet.payload_length = max_receive; | |
1159 | packet.interrupt = 1; | |
1160 | packet.skip = 0; | |
1161 | packet.tag = 3; | |
1162 | packet.sy = 0; | |
f91e3bd8 | 1163 | packet.header_length = IEEE1394_GASP_HDR_SIZE; |
c76acec6 | 1164 | offset = 0; |
f91e3bd8 SR |
1165 | |
1166 | for (u = 0; u < num_packets; u++) { | |
1167 | retval = fw_iso_context_queue(context, &packet, | |
1168 | &dev->broadcast_rcv_buffer, offset); | |
1169 | if (retval < 0) | |
111534cd | 1170 | goto failed; |
f91e3bd8 | 1171 | |
c76acec6 JF |
1172 | offset += max_receive; |
1173 | } | |
f91e3bd8 SR |
1174 | dev->num_broadcast_rcv_ptrs = num_packets; |
1175 | dev->rcv_buffer_size = max_receive; | |
1176 | dev->broadcast_rcv_next_ptr = 0U; | |
1177 | retval = fw_iso_context_start(context, -1, 0, | |
1178 | FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ | |
1179 | if (retval < 0) | |
111534cd | 1180 | goto failed; |
f91e3bd8 SR |
1181 | |
1182 | /* FIXME: adjust it according to the min. speed of all known peers? */ | |
1183 | dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 | |
1184 | - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; | |
1185 | dev->broadcast_state = FWNET_BROADCAST_RUNNING; | |
1186 | ||
c76acec6 JF |
1187 | return 0; |
1188 | ||
111534cd YH |
1189 | failed: |
1190 | __fwnet_broadcast_stop(dev); | |
c76acec6 JF |
1191 | return retval; |
1192 | } | |
1193 | ||
c1671470 SR |
1194 | static void set_carrier_state(struct fwnet_device *dev) |
1195 | { | |
1196 | if (dev->peer_count > 1) | |
1197 | netif_carrier_on(dev->netdev); | |
1198 | else | |
1199 | netif_carrier_off(dev->netdev); | |
1200 | } | |
1201 | ||
f91e3bd8 SR |
1202 | /* ifup */ |
1203 | static int fwnet_open(struct net_device *net) | |
1204 | { | |
1205 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1206 | int ret; |
1207 | ||
2fbd8dfe YH |
1208 | ret = fwnet_broadcast_start(dev); |
1209 | if (ret) | |
382c4b40 | 1210 | return ret; |
2fbd8dfe | 1211 | |
f91e3bd8 SR |
1212 | netif_start_queue(net); |
1213 | ||
c1671470 SR |
1214 | spin_lock_irq(&dev->lock); |
1215 | set_carrier_state(dev); | |
1216 | spin_unlock_irq(&dev->lock); | |
1217 | ||
c76acec6 JF |
1218 | return 0; |
1219 | } | |
1220 | ||
f91e3bd8 SR |
1221 | /* ifdown */ |
1222 | static int fwnet_stop(struct net_device *net) | |
c76acec6 | 1223 | { |
8559e7f0 YH |
1224 | struct fwnet_device *dev = netdev_priv(net); |
1225 | ||
f91e3bd8 | 1226 | netif_stop_queue(net); |
8559e7f0 | 1227 | fwnet_broadcast_stop(dev); |
c76acec6 | 1228 | |
c76acec6 JF |
1229 | return 0; |
1230 | } | |
1231 | ||
424efe9c | 1232 | static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) |
c76acec6 | 1233 | { |
f91e3bd8 SR |
1234 | struct fwnet_header hdr_buf; |
1235 | struct fwnet_device *dev = netdev_priv(net); | |
c76acec6 JF |
1236 | __be16 proto; |
1237 | u16 dest_node; | |
c76acec6 JF |
1238 | unsigned max_payload; |
1239 | u16 dg_size; | |
1240 | u16 *datagram_label_ptr; | |
f91e3bd8 | 1241 | struct fwnet_packet_task *ptask; |
5a124d38 SR |
1242 | struct fwnet_peer *peer; |
1243 | unsigned long flags; | |
c76acec6 | 1244 | |
b2268830 SR |
1245 | spin_lock_irqsave(&dev->lock, flags); |
1246 | ||
1247 | /* Can this happen? */ | |
1248 | if (netif_queue_stopped(dev->netdev)) { | |
1249 | spin_unlock_irqrestore(&dev->lock, flags); | |
1250 | ||
1251 | return NETDEV_TX_BUSY; | |
1252 | } | |
1253 | ||
f91e3bd8 | 1254 | ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); |
c76acec6 JF |
1255 | if (ptask == NULL) |
1256 | goto fail; | |
1257 | ||
1258 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1259 | if (!skb) | |
1260 | goto fail; | |
1261 | ||
1262 | /* | |
f91e3bd8 | 1263 | * Make a copy of the driver-specific header. |
c76acec6 JF |
1264 | * We might need to rebuild the header on tx failure. |
1265 | */ | |
1266 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
c76acec6 | 1267 | proto = hdr_buf.h_proto; |
18406d7e YH |
1268 | |
1269 | switch (proto) { | |
1270 | case htons(ETH_P_ARP): | |
1271 | case htons(ETH_P_IP): | |
cb6bf355 YH |
1272 | #if IS_ENABLED(CONFIG_IPV6) |
1273 | case htons(ETH_P_IPV6): | |
1274 | #endif | |
18406d7e YH |
1275 | break; |
1276 | default: | |
1277 | goto fail; | |
1278 | } | |
1279 | ||
1280 | skb_pull(skb, sizeof(hdr_buf)); | |
c76acec6 JF |
1281 | dg_size = skb->len; |
1282 | ||
1283 | /* | |
1284 | * Set the transmission type for the packet. ARP packets and IP | |
1285 | * broadcast packets are sent via GASP. | |
1286 | */ | |
021b97e4 | 1287 | if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) { |
5a124d38 | 1288 | max_payload = dev->broadcast_xmt_max_payload; |
f91e3bd8 SR |
1289 | datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; |
1290 | ||
5a124d38 SR |
1291 | ptask->fifo_addr = FWNET_NO_FIFO_ADDR; |
1292 | ptask->generation = 0; | |
1293 | ptask->dest_node = IEEE1394_ALL_NODES; | |
1294 | ptask->speed = SCODE_100; | |
c76acec6 | 1295 | } else { |
6752c8db YH |
1296 | union fwnet_hwaddr *ha = (union fwnet_hwaddr *)hdr_buf.h_dest; |
1297 | __be64 guid = get_unaligned(&ha->uc.uniq_id); | |
c76acec6 JF |
1298 | u8 generation; |
1299 | ||
f91e3bd8 | 1300 | peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); |
6752c8db | 1301 | if (!peer) |
b2268830 | 1302 | goto fail; |
c76acec6 | 1303 | |
5a124d38 SR |
1304 | generation = peer->generation; |
1305 | dest_node = peer->node_id; | |
1306 | max_payload = peer->max_payload; | |
f91e3bd8 | 1307 | datagram_label_ptr = &peer->datagram_label; |
c76acec6 | 1308 | |
6752c8db | 1309 | ptask->fifo_addr = fwnet_hwaddr_fifo(ha); |
5a124d38 SR |
1310 | ptask->generation = generation; |
1311 | ptask->dest_node = dest_node; | |
1312 | ptask->speed = peer->speed; | |
c76acec6 JF |
1313 | } |
1314 | ||
c76acec6 JF |
1315 | ptask->hdr.w0 = 0; |
1316 | ptask->hdr.w1 = 0; | |
1317 | ptask->skb = skb; | |
f91e3bd8 SR |
1318 | ptask->dev = dev; |
1319 | ||
c76acec6 | 1320 | /* Does it all fit in one packet? */ |
f91e3bd8 SR |
1321 | if (dg_size <= max_payload) { |
1322 | fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); | |
c76acec6 | 1323 | ptask->outstanding_pkts = 1; |
f91e3bd8 | 1324 | max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; |
c76acec6 JF |
1325 | } else { |
1326 | u16 datagram_label; | |
1327 | ||
f91e3bd8 | 1328 | max_payload -= RFC2374_FRAG_OVERHEAD; |
c76acec6 | 1329 | datagram_label = (*datagram_label_ptr)++; |
f91e3bd8 SR |
1330 | fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, |
1331 | datagram_label); | |
c76acec6 | 1332 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
f91e3bd8 | 1333 | max_payload += RFC2374_FRAG_HDR_SIZE; |
c76acec6 | 1334 | } |
5a124d38 | 1335 | |
b2268830 SR |
1336 | if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS) |
1337 | netif_stop_queue(dev->netdev); | |
48553011 | 1338 | |
5a124d38 SR |
1339 | spin_unlock_irqrestore(&dev->lock, flags); |
1340 | ||
c76acec6 | 1341 | ptask->max_payload = max_payload; |
48553011 | 1342 | ptask->enqueued = 0; |
110f82d7 | 1343 | |
f91e3bd8 SR |
1344 | fwnet_send_packet(ptask); |
1345 | ||
c76acec6 JF |
1346 | return NETDEV_TX_OK; |
1347 | ||
1348 | fail: | |
b2268830 SR |
1349 | spin_unlock_irqrestore(&dev->lock, flags); |
1350 | ||
c76acec6 | 1351 | if (ptask) |
f91e3bd8 | 1352 | kmem_cache_free(fwnet_packet_task_cache, ptask); |
c76acec6 JF |
1353 | |
1354 | if (skb != NULL) | |
1355 | dev_kfree_skb(skb); | |
1356 | ||
f91e3bd8 SR |
1357 | net->stats.tx_dropped++; |
1358 | net->stats.tx_errors++; | |
c76acec6 JF |
1359 | |
1360 | /* | |
1361 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1362 | * causes serious problems" here, allegedly. Before that patch, | |
1363 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1364 | * Perhaps more needs to be done? Stop the queue in serious | |
1365 | * conditions and restart it elsewhere? | |
1366 | */ | |
1367 | return NETDEV_TX_OK; | |
1368 | } | |
1369 | ||
18bb36f9 ML |
1370 | static const struct ethtool_ops fwnet_ethtool_ops = { |
1371 | .get_link = ethtool_op_get_link, | |
1372 | }; | |
1373 | ||
f91e3bd8 SR |
1374 | static const struct net_device_ops fwnet_netdev_ops = { |
1375 | .ndo_open = fwnet_open, | |
1376 | .ndo_stop = fwnet_stop, | |
1377 | .ndo_start_xmit = fwnet_tx, | |
c76acec6 JF |
1378 | }; |
1379 | ||
f91e3bd8 SR |
1380 | static void fwnet_init_dev(struct net_device *net) |
1381 | { | |
1382 | net->header_ops = &fwnet_header_ops; | |
1383 | net->netdev_ops = &fwnet_netdev_ops; | |
1337f853 | 1384 | net->watchdog_timeo = 2 * HZ; |
f91e3bd8 SR |
1385 | net->flags = IFF_BROADCAST | IFF_MULTICAST; |
1386 | net->features = NETIF_F_HIGHDMA; | |
1387 | net->addr_len = FWNET_ALEN; | |
1388 | net->hard_header_len = FWNET_HLEN; | |
1389 | net->type = ARPHRD_IEEE1394; | |
b2268830 | 1390 | net->tx_queue_len = FWNET_TX_QUEUE_LEN; |
18bb36f9 | 1391 | net->ethtool_ops = &fwnet_ethtool_ops; |
c76acec6 JF |
1392 | } |
1393 | ||
5a124d38 SR |
1394 | /* caller must hold fwnet_device_mutex */ |
1395 | static struct fwnet_device *fwnet_dev_find(struct fw_card *card) | |
1396 | { | |
1397 | struct fwnet_device *dev; | |
1398 | ||
1399 | list_for_each_entry(dev, &fwnet_device_list, dev_link) | |
1400 | if (dev->card == card) | |
1401 | return dev; | |
1402 | ||
1403 | return NULL; | |
1404 | } | |
1405 | ||
1406 | static int fwnet_add_peer(struct fwnet_device *dev, | |
1407 | struct fw_unit *unit, struct fw_device *device) | |
1408 | { | |
1409 | struct fwnet_peer *peer; | |
1410 | ||
1411 | peer = kmalloc(sizeof(*peer), GFP_KERNEL); | |
1412 | if (!peer) | |
1413 | return -ENOMEM; | |
1414 | ||
b01b4bab SR |
1415 | dev_set_drvdata(&unit->device, peer); |
1416 | ||
5a124d38 SR |
1417 | peer->dev = dev; |
1418 | peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; | |
5a124d38 SR |
1419 | INIT_LIST_HEAD(&peer->pd_list); |
1420 | peer->pdg_size = 0; | |
1421 | peer->datagram_label = 0; | |
1422 | peer->speed = device->max_speed; | |
1423 | peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); | |
1424 | ||
1425 | peer->generation = device->generation; | |
1426 | smp_rmb(); | |
1427 | peer->node_id = device->node_id; | |
1428 | ||
1429 | spin_lock_irq(&dev->lock); | |
1430 | list_add_tail(&peer->peer_link, &dev->peer_list); | |
18bb36f9 | 1431 | dev->peer_count++; |
c1671470 | 1432 | set_carrier_state(dev); |
5a124d38 SR |
1433 | spin_unlock_irq(&dev->lock); |
1434 | ||
1435 | return 0; | |
1436 | } | |
1437 | ||
94a87157 SR |
1438 | static int fwnet_probe(struct fw_unit *unit, |
1439 | const struct ieee1394_device_id *id) | |
f91e3bd8 | 1440 | { |
f91e3bd8 SR |
1441 | struct fw_device *device = fw_parent_device(unit); |
1442 | struct fw_card *card = device->card; | |
1443 | struct net_device *net; | |
b01b4bab | 1444 | bool allocated_netdev = false; |
f91e3bd8 | 1445 | struct fwnet_device *dev; |
aaaaa137 | 1446 | union fwnet_hwaddr ha; |
5a124d38 | 1447 | int ret; |
c76acec6 | 1448 | |
5a124d38 | 1449 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1450 | |
5a124d38 SR |
1451 | dev = fwnet_dev_find(card); |
1452 | if (dev) { | |
5a124d38 SR |
1453 | net = dev->netdev; |
1454 | goto have_dev; | |
c76acec6 | 1455 | } |
5a124d38 | 1456 | |
c835a677 TG |
1457 | net = alloc_netdev(sizeof(*dev), "firewire%d", NET_NAME_UNKNOWN, |
1458 | fwnet_init_dev); | |
f91e3bd8 | 1459 | if (net == NULL) { |
1118f8d0 DY |
1460 | mutex_unlock(&fwnet_device_mutex); |
1461 | return -ENOMEM; | |
c76acec6 JF |
1462 | } |
1463 | ||
b01b4bab | 1464 | allocated_netdev = true; |
f91e3bd8 SR |
1465 | SET_NETDEV_DEV(net, card->device); |
1466 | dev = netdev_priv(net); | |
c76acec6 | 1467 | |
f91e3bd8 SR |
1468 | spin_lock_init(&dev->lock); |
1469 | dev->broadcast_state = FWNET_BROADCAST_ERROR; | |
1470 | dev->broadcast_rcv_context = NULL; | |
1471 | dev->broadcast_xmt_max_payload = 0; | |
1472 | dev->broadcast_xmt_datagramlabel = 0; | |
f91e3bd8 | 1473 | dev->local_fifo = FWNET_NO_FIFO_ADDR; |
48553011 | 1474 | dev->queued_datagrams = 0; |
5a124d38 | 1475 | INIT_LIST_HEAD(&dev->peer_list); |
f91e3bd8 | 1476 | dev->card = card; |
5a124d38 | 1477 | dev->netdev = net; |
c76acec6 | 1478 | |
382c4b40 YH |
1479 | ret = fwnet_fifo_start(dev); |
1480 | if (ret < 0) | |
1481 | goto out; | |
1482 | dev->local_fifo = dev->handler.offset; | |
1483 | ||
4adf7bf7 SR |
1484 | /* |
1485 | * default MTU: RFC 2734 cl. 4, RFC 3146 cl. 4 | |
1486 | * maximum MTU: RFC 2734 cl. 4.2, fragment encapsulation header's | |
1487 | * maximum possible datagram_size + 1 = 0xfff + 1 | |
1488 | */ | |
89ab88b0 | 1489 | net->mtu = 1500U; |
b3e3893e | 1490 | net->min_mtu = ETH_MIN_MTU; |
4adf7bf7 | 1491 | net->max_mtu = 4096U; |
c76acec6 JF |
1492 | |
1493 | /* Set our hardware address while we're at it */ | |
aaaaa137 JK |
1494 | ha.uc.uniq_id = cpu_to_be64(card->guid); |
1495 | ha.uc.max_rec = dev->card->max_receive; | |
1496 | ha.uc.sspd = dev->card->link_speed; | |
1497 | ha.uc.fifo_hi = cpu_to_be16(dev->local_fifo >> 32); | |
1498 | ha.uc.fifo_lo = cpu_to_be32(dev->local_fifo & 0xffffffff); | |
1499 | dev_addr_set(net, ha.u); | |
6752c8db YH |
1500 | |
1501 | memset(net->broadcast, -1, net->addr_len); | |
1502 | ||
5a124d38 | 1503 | ret = register_netdev(net); |
8408dc1c | 1504 | if (ret) |
c76acec6 | 1505 | goto out; |
c76acec6 | 1506 | |
5a124d38 | 1507 | list_add_tail(&dev->dev_link, &fwnet_device_list); |
cb6bf355 | 1508 | dev_notice(&net->dev, "IP over IEEE 1394 on card %s\n", |
8408dc1c | 1509 | dev_name(card->device)); |
5a124d38 SR |
1510 | have_dev: |
1511 | ret = fwnet_add_peer(dev, unit, device); | |
b01b4bab | 1512 | if (ret && allocated_netdev) { |
5a124d38 SR |
1513 | unregister_netdev(net); |
1514 | list_del(&dev->dev_link); | |
c76acec6 | 1515 | out: |
382c4b40 | 1516 | fwnet_fifo_stop(dev); |
f91e3bd8 | 1517 | free_netdev(net); |
382c4b40 | 1518 | } |
f91e3bd8 | 1519 | |
5a124d38 SR |
1520 | mutex_unlock(&fwnet_device_mutex); |
1521 | ||
1522 | return ret; | |
1523 | } | |
1524 | ||
94a87157 SR |
1525 | /* |
1526 | * FIXME abort partially sent fragmented datagrams, | |
1527 | * discard partially received fragmented datagrams | |
1528 | */ | |
1529 | static void fwnet_update(struct fw_unit *unit) | |
1530 | { | |
1531 | struct fw_device *device = fw_parent_device(unit); | |
1532 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); | |
1533 | int generation; | |
1534 | ||
1535 | generation = device->generation; | |
1536 | ||
1537 | spin_lock_irq(&peer->dev->lock); | |
1538 | peer->node_id = device->node_id; | |
1539 | peer->generation = generation; | |
1540 | spin_unlock_irq(&peer->dev->lock); | |
1541 | } | |
1542 | ||
c1671470 | 1543 | static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev) |
5a124d38 SR |
1544 | { |
1545 | struct fwnet_partial_datagram *pd, *pd_next; | |
1546 | ||
c1671470 | 1547 | spin_lock_irq(&dev->lock); |
5a124d38 | 1548 | list_del(&peer->peer_link); |
c1671470 SR |
1549 | dev->peer_count--; |
1550 | set_carrier_state(dev); | |
1551 | spin_unlock_irq(&dev->lock); | |
5a124d38 SR |
1552 | |
1553 | list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) | |
1554 | fwnet_pd_delete(pd); | |
1555 | ||
1556 | kfree(peer); | |
c76acec6 JF |
1557 | } |
1558 | ||
94a87157 | 1559 | static void fwnet_remove(struct fw_unit *unit) |
f91e3bd8 | 1560 | { |
94a87157 | 1561 | struct fwnet_peer *peer = dev_get_drvdata(&unit->device); |
5a124d38 | 1562 | struct fwnet_device *dev = peer->dev; |
f91e3bd8 | 1563 | struct net_device *net; |
48553011 | 1564 | int i; |
f91e3bd8 | 1565 | |
5a124d38 | 1566 | mutex_lock(&fwnet_device_mutex); |
c76acec6 | 1567 | |
74a14504 | 1568 | net = dev->netdev; |
74a14504 | 1569 | |
c1671470 | 1570 | fwnet_remove_peer(peer, dev); |
18bb36f9 | 1571 | |
5a124d38 | 1572 | if (list_empty(&dev->peer_list)) { |
f91e3bd8 SR |
1573 | unregister_netdev(net); |
1574 | ||
382c4b40 YH |
1575 | fwnet_fifo_stop(dev); |
1576 | ||
48553011 SR |
1577 | for (i = 0; dev->queued_datagrams && i < 5; i++) |
1578 | ssleep(1); | |
1579 | WARN_ON(dev->queued_datagrams); | |
b01b4bab SR |
1580 | list_del(&dev->dev_link); |
1581 | ||
f91e3bd8 | 1582 | free_netdev(net); |
c76acec6 | 1583 | } |
f91e3bd8 | 1584 | |
5a124d38 | 1585 | mutex_unlock(&fwnet_device_mutex); |
c76acec6 JF |
1586 | } |
1587 | ||
f91e3bd8 SR |
1588 | static const struct ieee1394_device_id fwnet_id_table[] = { |
1589 | { | |
1590 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1591 | IEEE1394_MATCH_VERSION, | |
1592 | .specifier_id = IANA_SPECIFIER_ID, | |
1593 | .version = RFC2734_SW_VERSION, | |
1594 | }, | |
cb6bf355 YH |
1595 | #if IS_ENABLED(CONFIG_IPV6) |
1596 | { | |
1597 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | | |
1598 | IEEE1394_MATCH_VERSION, | |
1599 | .specifier_id = IANA_SPECIFIER_ID, | |
1600 | .version = RFC3146_SW_VERSION, | |
1601 | }, | |
1602 | #endif | |
f91e3bd8 SR |
1603 | { } |
1604 | }; | |
1605 | ||
1606 | static struct fw_driver fwnet_driver = { | |
c76acec6 | 1607 | .driver = { |
f91e3bd8 | 1608 | .owner = THIS_MODULE, |
59759ff6 | 1609 | .name = KBUILD_MODNAME, |
f91e3bd8 | 1610 | .bus = &fw_bus_type, |
c76acec6 | 1611 | }, |
94a87157 | 1612 | .probe = fwnet_probe, |
f91e3bd8 | 1613 | .update = fwnet_update, |
94a87157 | 1614 | .remove = fwnet_remove, |
f91e3bd8 SR |
1615 | .id_table = fwnet_id_table, |
1616 | }; | |
1617 | ||
1618 | static const u32 rfc2374_unit_directory_data[] = { | |
1619 | 0x00040000, /* directory_length */ | |
1620 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1621 | 0x81000003, /* textual descriptor offset */ | |
1622 | 0x13000001, /* unit_sw_version: RFC 2734 */ | |
1623 | 0x81000005, /* textual descriptor offset */ | |
1624 | 0x00030000, /* descriptor_length */ | |
1625 | 0x00000000, /* text */ | |
1626 | 0x00000000, /* minimal ASCII, en */ | |
1627 | 0x49414e41, /* I A N A */ | |
1628 | 0x00030000, /* descriptor_length */ | |
1629 | 0x00000000, /* text */ | |
1630 | 0x00000000, /* minimal ASCII, en */ | |
1631 | 0x49507634, /* I P v 4 */ | |
1632 | }; | |
1633 | ||
1634 | static struct fw_descriptor rfc2374_unit_directory = { | |
1635 | .length = ARRAY_SIZE(rfc2374_unit_directory_data), | |
1636 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1637 | .data = rfc2374_unit_directory_data | |
c76acec6 JF |
1638 | }; |
1639 | ||
cb6bf355 YH |
1640 | #if IS_ENABLED(CONFIG_IPV6) |
1641 | static const u32 rfc3146_unit_directory_data[] = { | |
1642 | 0x00040000, /* directory_length */ | |
1643 | 0x1200005e, /* unit_specifier_id: IANA */ | |
1644 | 0x81000003, /* textual descriptor offset */ | |
1645 | 0x13000002, /* unit_sw_version: RFC 3146 */ | |
1646 | 0x81000005, /* textual descriptor offset */ | |
1647 | 0x00030000, /* descriptor_length */ | |
1648 | 0x00000000, /* text */ | |
1649 | 0x00000000, /* minimal ASCII, en */ | |
1650 | 0x49414e41, /* I A N A */ | |
1651 | 0x00030000, /* descriptor_length */ | |
1652 | 0x00000000, /* text */ | |
1653 | 0x00000000, /* minimal ASCII, en */ | |
1654 | 0x49507636, /* I P v 6 */ | |
1655 | }; | |
1656 | ||
1657 | static struct fw_descriptor rfc3146_unit_directory = { | |
1658 | .length = ARRAY_SIZE(rfc3146_unit_directory_data), | |
1659 | .key = (CSR_DIRECTORY | CSR_UNIT) << 24, | |
1660 | .data = rfc3146_unit_directory_data | |
1661 | }; | |
1662 | #endif | |
1663 | ||
f91e3bd8 SR |
1664 | static int __init fwnet_init(void) |
1665 | { | |
1666 | int err; | |
1667 | ||
1668 | err = fw_core_add_descriptor(&rfc2374_unit_directory); | |
1669 | if (err) | |
1670 | return err; | |
c76acec6 | 1671 | |
cb6bf355 YH |
1672 | #if IS_ENABLED(CONFIG_IPV6) |
1673 | err = fw_core_add_descriptor(&rfc3146_unit_directory); | |
1674 | if (err) | |
1675 | goto out; | |
1676 | #endif | |
1677 | ||
f91e3bd8 SR |
1678 | fwnet_packet_task_cache = kmem_cache_create("packet_task", |
1679 | sizeof(struct fwnet_packet_task), 0, 0, NULL); | |
1680 | if (!fwnet_packet_task_cache) { | |
1681 | err = -ENOMEM; | |
cb6bf355 | 1682 | goto out2; |
f91e3bd8 SR |
1683 | } |
1684 | ||
1685 | err = driver_register(&fwnet_driver.driver); | |
1686 | if (!err) | |
1687 | return 0; | |
1688 | ||
1689 | kmem_cache_destroy(fwnet_packet_task_cache); | |
cb6bf355 YH |
1690 | out2: |
1691 | #if IS_ENABLED(CONFIG_IPV6) | |
1692 | fw_core_remove_descriptor(&rfc3146_unit_directory); | |
f91e3bd8 | 1693 | out: |
cb6bf355 | 1694 | #endif |
f91e3bd8 SR |
1695 | fw_core_remove_descriptor(&rfc2374_unit_directory); |
1696 | ||
1697 | return err; | |
c76acec6 | 1698 | } |
f91e3bd8 | 1699 | module_init(fwnet_init); |
c76acec6 | 1700 | |
f91e3bd8 SR |
1701 | static void __exit fwnet_cleanup(void) |
1702 | { | |
1703 | driver_unregister(&fwnet_driver.driver); | |
1704 | kmem_cache_destroy(fwnet_packet_task_cache); | |
cb6bf355 YH |
1705 | #if IS_ENABLED(CONFIG_IPV6) |
1706 | fw_core_remove_descriptor(&rfc3146_unit_directory); | |
1707 | #endif | |
f91e3bd8 | 1708 | fw_core_remove_descriptor(&rfc2374_unit_directory); |
c76acec6 | 1709 | } |
f91e3bd8 | 1710 | module_exit(fwnet_cleanup); |
c76acec6 | 1711 | |
f91e3bd8 | 1712 | MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); |
cb6bf355 | 1713 | MODULE_DESCRIPTION("IP over IEEE1394 as per RFC 2734/3146"); |
f91e3bd8 SR |
1714 | MODULE_LICENSE("GPL"); |
1715 | MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); |