Commit | Line | Data |
---|---|---|
52e112b3 | 1 | /* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */ |
1da177e4 LT |
2 | /* |
3 | * aoecmd.c | |
4 | * Filesystem request handling methods | |
5 | */ | |
6 | ||
04b3ab52 | 7 | #include <linux/ata.h> |
1da177e4 LT |
8 | #include <linux/hdreg.h> |
9 | #include <linux/blkdev.h> | |
10 | #include <linux/skbuff.h> | |
11 | #include <linux/netdevice.h> | |
3ae1c24e | 12 | #include <linux/genhd.h> |
68e0d42f | 13 | #include <linux/moduleparam.h> |
881d966b | 14 | #include <net/net_namespace.h> |
475172fb | 15 | #include <asm/unaligned.h> |
1da177e4 LT |
16 | #include "aoe.h" |
17 | ||
b751e8b6 EC |
18 | static int aoe_deadsecs = 60 * 3; |
19 | module_param(aoe_deadsecs, int, 0644); | |
20 | MODULE_PARM_DESC(aoe_deadsecs, "After aoe_deadsecs seconds, give up and fail dev."); | |
1da177e4 | 21 | |
7df620d8 EC |
22 | static int aoe_maxout = 16; |
23 | module_param(aoe_maxout, int, 0644); | |
24 | MODULE_PARM_DESC(aoe_maxout, | |
25 | "Only aoe_maxout outstanding packets for every MAC on eX.Y."); | |
26 | ||
68e0d42f | 27 | static struct sk_buff * |
e407a7f6 | 28 | new_skb(ulong len) |
1da177e4 LT |
29 | { |
30 | struct sk_buff *skb; | |
31 | ||
32 | skb = alloc_skb(len, GFP_ATOMIC); | |
33 | if (skb) { | |
459a98ed | 34 | skb_reset_mac_header(skb); |
c1d2bbe1 | 35 | skb_reset_network_header(skb); |
1da177e4 | 36 | skb->protocol = __constant_htons(ETH_P_AOE); |
1da177e4 LT |
37 | } |
38 | return skb; | |
39 | } | |
40 | ||
1da177e4 | 41 | static struct frame * |
68e0d42f | 42 | getframe(struct aoetgt *t, int tag) |
1da177e4 LT |
43 | { |
44 | struct frame *f, *e; | |
45 | ||
68e0d42f EC |
46 | f = t->frames; |
47 | e = f + t->nframes; | |
1da177e4 LT |
48 | for (; f<e; f++) |
49 | if (f->tag == tag) | |
50 | return f; | |
51 | return NULL; | |
52 | } | |
53 | ||
54 | /* | |
55 | * Leave the top bit clear so we have tagspace for userland. | |
56 | * The bottom 16 bits are the xmit tick for rexmit/rttavg processing. | |
57 | * This driver reserves tag -1 to mean "unused frame." | |
58 | */ | |
59 | static int | |
68e0d42f | 60 | newtag(struct aoetgt *t) |
1da177e4 LT |
61 | { |
62 | register ulong n; | |
63 | ||
64 | n = jiffies & 0xffff; | |
68e0d42f | 65 | return n |= (++t->lasttag & 0x7fff) << 16; |
1da177e4 LT |
66 | } |
67 | ||
68 | static int | |
68e0d42f | 69 | aoehdr_atainit(struct aoedev *d, struct aoetgt *t, struct aoe_hdr *h) |
1da177e4 | 70 | { |
68e0d42f | 71 | u32 host_tag = newtag(t); |
1da177e4 | 72 | |
68e0d42f EC |
73 | memcpy(h->src, t->ifp->nd->dev_addr, sizeof h->src); |
74 | memcpy(h->dst, t->addr, sizeof h->dst); | |
63e9cc5d | 75 | h->type = __constant_cpu_to_be16(ETH_P_AOE); |
1da177e4 | 76 | h->verfl = AOE_HVER; |
63e9cc5d | 77 | h->major = cpu_to_be16(d->aoemajor); |
1da177e4 LT |
78 | h->minor = d->aoeminor; |
79 | h->cmd = AOECMD_ATA; | |
63e9cc5d | 80 | h->tag = cpu_to_be32(host_tag); |
1da177e4 LT |
81 | |
82 | return host_tag; | |
83 | } | |
84 | ||
19bf2635 EC |
85 | static inline void |
86 | put_lba(struct aoe_atahdr *ah, sector_t lba) | |
87 | { | |
88 | ah->lba0 = lba; | |
89 | ah->lba1 = lba >>= 8; | |
90 | ah->lba2 = lba >>= 8; | |
91 | ah->lba3 = lba >>= 8; | |
92 | ah->lba4 = lba >>= 8; | |
93 | ah->lba5 = lba >>= 8; | |
94 | } | |
95 | ||
1da177e4 | 96 | static void |
68e0d42f EC |
97 | ifrotate(struct aoetgt *t) |
98 | { | |
99 | t->ifp++; | |
100 | if (t->ifp >= &t->ifs[NAOEIFS] || t->ifp->nd == NULL) | |
101 | t->ifp = t->ifs; | |
102 | if (t->ifp->nd == NULL) { | |
103 | printk(KERN_INFO "aoe: no interface to rotate to\n"); | |
104 | BUG(); | |
105 | } | |
106 | } | |
107 | ||
9bb237b6 EC |
108 | static void |
109 | skb_pool_put(struct aoedev *d, struct sk_buff *skb) | |
110 | { | |
e9bb8fb0 | 111 | __skb_queue_tail(&d->skbpool, skb); |
9bb237b6 EC |
112 | } |
113 | ||
114 | static struct sk_buff * | |
115 | skb_pool_get(struct aoedev *d) | |
116 | { | |
e9bb8fb0 | 117 | struct sk_buff *skb = skb_peek(&d->skbpool); |
9bb237b6 | 118 | |
9bb237b6 | 119 | if (skb && atomic_read(&skb_shinfo(skb)->dataref) == 1) { |
e9bb8fb0 | 120 | __skb_unlink(skb, &d->skbpool); |
9bb237b6 EC |
121 | return skb; |
122 | } | |
e9bb8fb0 DM |
123 | if (skb_queue_len(&d->skbpool) < NSKBPOOLMAX && |
124 | (skb = new_skb(ETH_ZLEN))) | |
9bb237b6 | 125 | return skb; |
e9bb8fb0 | 126 | |
9bb237b6 EC |
127 | return NULL; |
128 | } | |
129 | ||
130 | /* freeframe is where we do our load balancing so it's a little hairy. */ | |
68e0d42f EC |
131 | static struct frame * |
132 | freeframe(struct aoedev *d) | |
1da177e4 | 133 | { |
9bb237b6 | 134 | struct frame *f, *e, *rf; |
68e0d42f | 135 | struct aoetgt **t; |
9bb237b6 | 136 | struct sk_buff *skb; |
68e0d42f EC |
137 | |
138 | if (d->targets[0] == NULL) { /* shouldn't happen, but I'm paranoid */ | |
139 | printk(KERN_ERR "aoe: NULL TARGETS!\n"); | |
140 | return NULL; | |
141 | } | |
9bb237b6 EC |
142 | t = d->tgt; |
143 | t++; | |
144 | if (t >= &d->targets[NTARGETS] || !*t) | |
145 | t = d->targets; | |
146 | for (;;) { | |
147 | if ((*t)->nout < (*t)->maxout | |
148 | && t != d->htgt | |
149 | && (*t)->ifp->nd) { | |
150 | rf = NULL; | |
68e0d42f | 151 | f = (*t)->frames; |
9bb237b6 | 152 | e = f + (*t)->nframes; |
68e0d42f EC |
153 | for (; f < e; f++) { |
154 | if (f->tag != FREETAG) | |
155 | continue; | |
9bb237b6 EC |
156 | skb = f->skb; |
157 | if (!skb | |
158 | && !(f->skb = skb = new_skb(ETH_ZLEN))) | |
159 | continue; | |
160 | if (atomic_read(&skb_shinfo(skb)->dataref) | |
68e0d42f | 161 | != 1) { |
9bb237b6 EC |
162 | if (!rf) |
163 | rf = f; | |
68e0d42f EC |
164 | continue; |
165 | } | |
9bb237b6 EC |
166 | gotone: skb_shinfo(skb)->nr_frags = skb->data_len = 0; |
167 | skb_trim(skb, 0); | |
68e0d42f EC |
168 | d->tgt = t; |
169 | ifrotate(*t); | |
170 | return f; | |
171 | } | |
9bb237b6 EC |
172 | /* Work can be done, but the network layer is |
173 | holding our precious packets. Try to grab | |
174 | one from the pool. */ | |
175 | f = rf; | |
176 | if (f == NULL) { /* more paranoia */ | |
177 | printk(KERN_ERR | |
178 | "aoe: freeframe: %s.\n", | |
179 | "unexpected null rf"); | |
180 | d->flags |= DEVFL_KICKME; | |
181 | return NULL; | |
182 | } | |
183 | skb = skb_pool_get(d); | |
184 | if (skb) { | |
185 | skb_pool_put(d, f->skb); | |
186 | f->skb = skb; | |
187 | goto gotone; | |
188 | } | |
189 | (*t)->dataref++; | |
190 | if ((*t)->nout == 0) | |
68e0d42f EC |
191 | d->flags |= DEVFL_KICKME; |
192 | } | |
9bb237b6 EC |
193 | if (t == d->tgt) /* we've looped and found nada */ |
194 | break; | |
68e0d42f | 195 | t++; |
9bb237b6 EC |
196 | if (t >= &d->targets[NTARGETS] || !*t) |
197 | t = d->targets; | |
198 | } | |
68e0d42f EC |
199 | return NULL; |
200 | } | |
201 | ||
202 | static int | |
203 | aoecmd_ata_rw(struct aoedev *d) | |
204 | { | |
205 | struct frame *f; | |
1da177e4 LT |
206 | struct aoe_hdr *h; |
207 | struct aoe_atahdr *ah; | |
208 | struct buf *buf; | |
68e0d42f EC |
209 | struct bio_vec *bv; |
210 | struct aoetgt *t; | |
1da177e4 LT |
211 | struct sk_buff *skb; |
212 | ulong bcnt; | |
1da177e4 LT |
213 | char writebit, extbit; |
214 | ||
215 | writebit = 0x10; | |
216 | extbit = 0x4; | |
217 | ||
68e0d42f EC |
218 | f = freeframe(d); |
219 | if (f == NULL) | |
220 | return 0; | |
221 | t = *d->tgt; | |
1da177e4 | 222 | buf = d->inprocess; |
68e0d42f EC |
223 | bv = buf->bv; |
224 | bcnt = t->ifp->maxbcnt; | |
225 | if (bcnt == 0) | |
226 | bcnt = DEFAULTBCNT; | |
227 | if (bcnt > buf->bv_resid) | |
228 | bcnt = buf->bv_resid; | |
1da177e4 | 229 | /* initialize the headers & frame */ |
e407a7f6 | 230 | skb = f->skb; |
abdbf94d | 231 | h = (struct aoe_hdr *) skb_mac_header(skb); |
1da177e4 | 232 | ah = (struct aoe_atahdr *) (h+1); |
19900cde EC |
233 | skb_put(skb, sizeof *h + sizeof *ah); |
234 | memset(h, 0, skb->len); | |
68e0d42f EC |
235 | f->tag = aoehdr_atainit(d, t, h); |
236 | t->nout++; | |
1da177e4 LT |
237 | f->waited = 0; |
238 | f->buf = buf; | |
68e0d42f | 239 | f->bufaddr = page_address(bv->bv_page) + buf->bv_off; |
19bf2635 | 240 | f->bcnt = bcnt; |
68e0d42f | 241 | f->lba = buf->sector; |
1da177e4 LT |
242 | |
243 | /* set up ata header */ | |
244 | ah->scnt = bcnt >> 9; | |
68e0d42f | 245 | put_lba(ah, buf->sector); |
1da177e4 LT |
246 | if (d->flags & DEVFL_EXT) { |
247 | ah->aflags |= AOEAFL_EXT; | |
1da177e4 LT |
248 | } else { |
249 | extbit = 0; | |
250 | ah->lba3 &= 0x0f; | |
251 | ah->lba3 |= 0xe0; /* LBA bit + obsolete 0xa0 */ | |
252 | } | |
1da177e4 | 253 | if (bio_data_dir(buf->bio) == WRITE) { |
68e0d42f | 254 | skb_fill_page_desc(skb, 0, bv->bv_page, buf->bv_off, bcnt); |
1da177e4 | 255 | ah->aflags |= AOEAFL_WRITE; |
4f51dc5e EC |
256 | skb->len += bcnt; |
257 | skb->data_len = bcnt; | |
68e0d42f | 258 | t->wpkts++; |
1da177e4 | 259 | } else { |
68e0d42f | 260 | t->rpkts++; |
1da177e4 | 261 | writebit = 0; |
1da177e4 LT |
262 | } |
263 | ||
04b3ab52 | 264 | ah->cmdstat = ATA_CMD_PIO_READ | writebit | extbit; |
1da177e4 LT |
265 | |
266 | /* mark all tracking fields and load out */ | |
267 | buf->nframesout += 1; | |
68e0d42f | 268 | buf->bv_off += bcnt; |
1da177e4 | 269 | buf->bv_resid -= bcnt; |
1da177e4 LT |
270 | buf->resid -= bcnt; |
271 | buf->sector += bcnt >> 9; | |
272 | if (buf->resid == 0) { | |
273 | d->inprocess = NULL; | |
274 | } else if (buf->bv_resid == 0) { | |
68e0d42f EC |
275 | buf->bv = ++bv; |
276 | buf->bv_resid = bv->bv_len; | |
277 | WARN_ON(buf->bv_resid == 0); | |
278 | buf->bv_off = bv->bv_offset; | |
1da177e4 LT |
279 | } |
280 | ||
68e0d42f | 281 | skb->dev = t->ifp->nd; |
4f51dc5e | 282 | skb = skb_clone(skb, GFP_ATOMIC); |
e9bb8fb0 DM |
283 | if (skb) |
284 | __skb_queue_tail(&d->sendq, skb); | |
68e0d42f | 285 | return 1; |
1da177e4 LT |
286 | } |
287 | ||
3ae1c24e EC |
288 | /* some callers cannot sleep, and they can call this function, |
289 | * transmitting the packets later, when interrupts are on | |
290 | */ | |
e9bb8fb0 DM |
291 | static void |
292 | aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff_head *queue) | |
3ae1c24e EC |
293 | { |
294 | struct aoe_hdr *h; | |
295 | struct aoe_cfghdr *ch; | |
e9bb8fb0 | 296 | struct sk_buff *skb; |
3ae1c24e EC |
297 | struct net_device *ifp; |
298 | ||
3ae1c24e | 299 | read_lock(&dev_base_lock); |
881d966b | 300 | for_each_netdev(&init_net, ifp) { |
3ae1c24e EC |
301 | dev_hold(ifp); |
302 | if (!is_aoe_netif(ifp)) | |
7562f876 | 303 | goto cont; |
3ae1c24e | 304 | |
e407a7f6 | 305 | skb = new_skb(sizeof *h + sizeof *ch); |
3ae1c24e | 306 | if (skb == NULL) { |
a12c93f0 | 307 | printk(KERN_INFO "aoe: skb alloc failure\n"); |
7562f876 | 308 | goto cont; |
3ae1c24e | 309 | } |
19900cde | 310 | skb_put(skb, sizeof *h + sizeof *ch); |
e407a7f6 | 311 | skb->dev = ifp; |
e9bb8fb0 | 312 | __skb_queue_tail(queue, skb); |
abdbf94d | 313 | h = (struct aoe_hdr *) skb_mac_header(skb); |
3ae1c24e EC |
314 | memset(h, 0, sizeof *h + sizeof *ch); |
315 | ||
316 | memset(h->dst, 0xff, sizeof h->dst); | |
317 | memcpy(h->src, ifp->dev_addr, sizeof h->src); | |
318 | h->type = __constant_cpu_to_be16(ETH_P_AOE); | |
319 | h->verfl = AOE_HVER; | |
320 | h->major = cpu_to_be16(aoemajor); | |
321 | h->minor = aoeminor; | |
322 | h->cmd = AOECMD_CFG; | |
323 | ||
7562f876 PE |
324 | cont: |
325 | dev_put(ifp); | |
3ae1c24e EC |
326 | } |
327 | read_unlock(&dev_base_lock); | |
3ae1c24e EC |
328 | } |
329 | ||
1da177e4 | 330 | static void |
68e0d42f | 331 | resend(struct aoedev *d, struct aoetgt *t, struct frame *f) |
1da177e4 LT |
332 | { |
333 | struct sk_buff *skb; | |
334 | struct aoe_hdr *h; | |
19bf2635 | 335 | struct aoe_atahdr *ah; |
1da177e4 LT |
336 | char buf[128]; |
337 | u32 n; | |
1da177e4 | 338 | |
68e0d42f EC |
339 | ifrotate(t); |
340 | n = newtag(t); | |
341 | skb = f->skb; | |
342 | h = (struct aoe_hdr *) skb_mac_header(skb); | |
343 | ah = (struct aoe_atahdr *) (h+1); | |
1da177e4 LT |
344 | |
345 | snprintf(buf, sizeof buf, | |
411c41ee | 346 | "%15s e%ld.%d oldtag=%08x@%08lx newtag=%08x s=%pm d=%pm nout=%d\n", |
68e0d42f | 347 | "retransmit", d->aoemajor, d->aoeminor, f->tag, jiffies, n, |
411c41ee | 348 | h->src, h->dst, t->nout); |
1da177e4 LT |
349 | aoechr_error(buf); |
350 | ||
1da177e4 | 351 | f->tag = n; |
63e9cc5d | 352 | h->tag = cpu_to_be32(n); |
68e0d42f EC |
353 | memcpy(h->dst, t->addr, sizeof h->dst); |
354 | memcpy(h->src, t->ifp->nd->dev_addr, sizeof h->src); | |
355 | ||
356 | switch (ah->cmdstat) { | |
357 | default: | |
358 | break; | |
04b3ab52 BZ |
359 | case ATA_CMD_PIO_READ: |
360 | case ATA_CMD_PIO_READ_EXT: | |
361 | case ATA_CMD_PIO_WRITE: | |
362 | case ATA_CMD_PIO_WRITE_EXT: | |
68e0d42f EC |
363 | put_lba(ah, f->lba); |
364 | ||
365 | n = f->bcnt; | |
366 | if (n > DEFAULTBCNT) | |
367 | n = DEFAULTBCNT; | |
368 | ah->scnt = n >> 9; | |
4f51dc5e | 369 | if (ah->aflags & AOEAFL_WRITE) { |
19bf2635 | 370 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), |
68e0d42f EC |
371 | offset_in_page(f->bufaddr), n); |
372 | skb->len = sizeof *h + sizeof *ah + n; | |
373 | skb->data_len = n; | |
19bf2635 EC |
374 | } |
375 | } | |
68e0d42f | 376 | skb->dev = t->ifp->nd; |
4f51dc5e EC |
377 | skb = skb_clone(skb, GFP_ATOMIC); |
378 | if (skb == NULL) | |
379 | return; | |
e9bb8fb0 | 380 | __skb_queue_tail(&d->sendq, skb); |
1da177e4 LT |
381 | } |
382 | ||
383 | static int | |
384 | tsince(int tag) | |
385 | { | |
386 | int n; | |
387 | ||
388 | n = jiffies & 0xffff; | |
389 | n -= tag & 0xffff; | |
390 | if (n < 0) | |
391 | n += 1<<16; | |
392 | return n; | |
393 | } | |
394 | ||
68e0d42f EC |
395 | static struct aoeif * |
396 | getif(struct aoetgt *t, struct net_device *nd) | |
397 | { | |
398 | struct aoeif *p, *e; | |
399 | ||
400 | p = t->ifs; | |
401 | e = p + NAOEIFS; | |
402 | for (; p < e; p++) | |
403 | if (p->nd == nd) | |
404 | return p; | |
405 | return NULL; | |
406 | } | |
407 | ||
408 | static struct aoeif * | |
409 | addif(struct aoetgt *t, struct net_device *nd) | |
410 | { | |
411 | struct aoeif *p; | |
412 | ||
413 | p = getif(t, NULL); | |
414 | if (!p) | |
415 | return NULL; | |
416 | p->nd = nd; | |
417 | p->maxbcnt = DEFAULTBCNT; | |
418 | p->lost = 0; | |
419 | p->lostjumbo = 0; | |
420 | return p; | |
421 | } | |
422 | ||
423 | static void | |
424 | ejectif(struct aoetgt *t, struct aoeif *ifp) | |
425 | { | |
426 | struct aoeif *e; | |
427 | ulong n; | |
428 | ||
429 | e = t->ifs + NAOEIFS - 1; | |
430 | n = (e - ifp) * sizeof *ifp; | |
431 | memmove(ifp, ifp+1, n); | |
432 | e->nd = NULL; | |
433 | } | |
434 | ||
435 | static int | |
436 | sthtith(struct aoedev *d) | |
437 | { | |
438 | struct frame *f, *e, *nf; | |
439 | struct sk_buff *skb; | |
440 | struct aoetgt *ht = *d->htgt; | |
441 | ||
442 | f = ht->frames; | |
443 | e = f + ht->nframes; | |
444 | for (; f < e; f++) { | |
445 | if (f->tag == FREETAG) | |
446 | continue; | |
447 | nf = freeframe(d); | |
448 | if (!nf) | |
449 | return 0; | |
450 | skb = nf->skb; | |
451 | *nf = *f; | |
452 | f->skb = skb; | |
453 | f->tag = FREETAG; | |
454 | nf->waited = 0; | |
455 | ht->nout--; | |
456 | (*d->tgt)->nout++; | |
457 | resend(d, *d->tgt, nf); | |
458 | } | |
459 | /* he's clean, he's useless. take away his interfaces */ | |
460 | memset(ht->ifs, 0, sizeof ht->ifs); | |
461 | d->htgt = NULL; | |
462 | return 1; | |
463 | } | |
464 | ||
465 | static inline unsigned char | |
466 | ata_scnt(unsigned char *packet) { | |
467 | struct aoe_hdr *h; | |
468 | struct aoe_atahdr *ah; | |
469 | ||
470 | h = (struct aoe_hdr *) packet; | |
471 | ah = (struct aoe_atahdr *) (h+1); | |
472 | return ah->scnt; | |
473 | } | |
474 | ||
1da177e4 LT |
475 | static void |
476 | rexmit_timer(ulong vp) | |
477 | { | |
e9bb8fb0 | 478 | struct sk_buff_head queue; |
1da177e4 | 479 | struct aoedev *d; |
68e0d42f EC |
480 | struct aoetgt *t, **tt, **te; |
481 | struct aoeif *ifp; | |
1da177e4 | 482 | struct frame *f, *e; |
1da177e4 LT |
483 | register long timeout; |
484 | ulong flags, n; | |
485 | ||
486 | d = (struct aoedev *) vp; | |
1da177e4 LT |
487 | |
488 | /* timeout is always ~150% of the moving average */ | |
489 | timeout = d->rttavg; | |
490 | timeout += timeout >> 1; | |
491 | ||
492 | spin_lock_irqsave(&d->lock, flags); | |
493 | ||
494 | if (d->flags & DEVFL_TKILL) { | |
1c6f3fca | 495 | spin_unlock_irqrestore(&d->lock, flags); |
1da177e4 LT |
496 | return; |
497 | } | |
68e0d42f EC |
498 | tt = d->targets; |
499 | te = tt + NTARGETS; | |
500 | for (; tt < te && *tt; tt++) { | |
501 | t = *tt; | |
502 | f = t->frames; | |
503 | e = f + t->nframes; | |
504 | for (; f < e; f++) { | |
505 | if (f->tag == FREETAG | |
506 | || tsince(f->tag) < timeout) | |
507 | continue; | |
1da177e4 LT |
508 | n = f->waited += timeout; |
509 | n /= HZ; | |
68e0d42f EC |
510 | if (n > aoe_deadsecs) { |
511 | /* waited too long. device failure. */ | |
1da177e4 | 512 | aoedev_downdev(d); |
1c6f3fca | 513 | break; |
1da177e4 | 514 | } |
68e0d42f EC |
515 | |
516 | if (n > HELPWAIT /* see if another target can help */ | |
517 | && (tt != d->targets || d->targets[1])) | |
518 | d->htgt = tt; | |
519 | ||
520 | if (t->nout == t->maxout) { | |
521 | if (t->maxout > 1) | |
522 | t->maxout--; | |
523 | t->lastwadj = jiffies; | |
524 | } | |
525 | ||
526 | ifp = getif(t, f->skb->dev); | |
527 | if (ifp && ++ifp->lost > (t->nframes << 1) | |
528 | && (ifp != t->ifs || t->ifs[1].nd)) { | |
529 | ejectif(t, ifp); | |
530 | ifp = NULL; | |
531 | } | |
532 | ||
533 | if (ata_scnt(skb_mac_header(f->skb)) > DEFAULTBCNT / 512 | |
534 | && ifp && ++ifp->lostjumbo > (t->nframes << 1) | |
535 | && ifp->maxbcnt != DEFAULTBCNT) { | |
536 | printk(KERN_INFO | |
537 | "aoe: e%ld.%d: " | |
538 | "too many lost jumbo on " | |
411c41ee | 539 | "%s:%pm - " |
68e0d42f EC |
540 | "falling back to %d frames.\n", |
541 | d->aoemajor, d->aoeminor, | |
411c41ee | 542 | ifp->nd->name, t->addr, |
68e0d42f EC |
543 | DEFAULTBCNT); |
544 | ifp->maxbcnt = 0; | |
545 | } | |
546 | resend(d, t, f); | |
547 | } | |
548 | ||
549 | /* window check */ | |
550 | if (t->nout == t->maxout | |
551 | && t->maxout < t->nframes | |
552 | && (jiffies - t->lastwadj)/HZ > 10) { | |
553 | t->maxout++; | |
554 | t->lastwadj = jiffies; | |
1da177e4 LT |
555 | } |
556 | } | |
68e0d42f | 557 | |
e9bb8fb0 | 558 | if (!skb_queue_empty(&d->sendq)) { |
68e0d42f EC |
559 | n = d->rttavg <<= 1; |
560 | if (n > MAXTIMER) | |
561 | d->rttavg = MAXTIMER; | |
562 | } | |
563 | ||
564 | if (d->flags & DEVFL_KICKME || d->htgt) { | |
4f51dc5e EC |
565 | d->flags &= ~DEVFL_KICKME; |
566 | aoecmd_work(d); | |
567 | } | |
1da177e4 | 568 | |
e9bb8fb0 DM |
569 | __skb_queue_head_init(&queue); |
570 | skb_queue_splice_init(&d->sendq, &queue); | |
1da177e4 LT |
571 | |
572 | d->timer.expires = jiffies + TIMERTICK; | |
573 | add_timer(&d->timer); | |
574 | ||
575 | spin_unlock_irqrestore(&d->lock, flags); | |
576 | ||
e9bb8fb0 | 577 | aoenet_xmit(&queue); |
1da177e4 LT |
578 | } |
579 | ||
68e0d42f EC |
580 | /* enters with d->lock held */ |
581 | void | |
582 | aoecmd_work(struct aoedev *d) | |
583 | { | |
584 | struct buf *buf; | |
585 | loop: | |
586 | if (d->htgt && !sthtith(d)) | |
587 | return; | |
588 | if (d->inprocess == NULL) { | |
589 | if (list_empty(&d->bufq)) | |
590 | return; | |
591 | buf = container_of(d->bufq.next, struct buf, bufs); | |
592 | list_del(d->bufq.next); | |
593 | d->inprocess = buf; | |
594 | } | |
595 | if (aoecmd_ata_rw(d)) | |
596 | goto loop; | |
597 | } | |
598 | ||
3ae1c24e EC |
599 | /* this function performs work that has been deferred until sleeping is OK |
600 | */ | |
601 | void | |
c4028958 | 602 | aoecmd_sleepwork(struct work_struct *work) |
3ae1c24e | 603 | { |
c4028958 | 604 | struct aoedev *d = container_of(work, struct aoedev, work); |
3ae1c24e EC |
605 | |
606 | if (d->flags & DEVFL_GDALLOC) | |
607 | aoeblk_gdalloc(d); | |
608 | ||
609 | if (d->flags & DEVFL_NEWSIZE) { | |
610 | struct block_device *bd; | |
611 | unsigned long flags; | |
612 | u64 ssize; | |
613 | ||
80795aef | 614 | ssize = get_capacity(d->gd); |
3ae1c24e EC |
615 | bd = bdget_disk(d->gd, 0); |
616 | ||
617 | if (bd) { | |
618 | mutex_lock(&bd->bd_inode->i_mutex); | |
619 | i_size_write(bd->bd_inode, (loff_t)ssize<<9); | |
620 | mutex_unlock(&bd->bd_inode->i_mutex); | |
621 | bdput(bd); | |
622 | } | |
623 | spin_lock_irqsave(&d->lock, flags); | |
624 | d->flags |= DEVFL_UP; | |
625 | d->flags &= ~DEVFL_NEWSIZE; | |
626 | spin_unlock_irqrestore(&d->lock, flags); | |
627 | } | |
628 | } | |
629 | ||
1da177e4 | 630 | static void |
68e0d42f | 631 | ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id) |
1da177e4 LT |
632 | { |
633 | u64 ssize; | |
634 | u16 n; | |
635 | ||
636 | /* word 83: command set supported */ | |
f885f8d1 | 637 | n = get_unaligned_le16(&id[83 << 1]); |
1da177e4 LT |
638 | |
639 | /* word 86: command set/feature enabled */ | |
f885f8d1 | 640 | n |= get_unaligned_le16(&id[86 << 1]); |
1da177e4 LT |
641 | |
642 | if (n & (1<<10)) { /* bit 10: LBA 48 */ | |
643 | d->flags |= DEVFL_EXT; | |
644 | ||
645 | /* word 100: number lba48 sectors */ | |
f885f8d1 | 646 | ssize = get_unaligned_le64(&id[100 << 1]); |
1da177e4 LT |
647 | |
648 | /* set as in ide-disk.c:init_idedisk_capacity */ | |
649 | d->geo.cylinders = ssize; | |
650 | d->geo.cylinders /= (255 * 63); | |
651 | d->geo.heads = 255; | |
652 | d->geo.sectors = 63; | |
653 | } else { | |
654 | d->flags &= ~DEVFL_EXT; | |
655 | ||
656 | /* number lba28 sectors */ | |
f885f8d1 | 657 | ssize = get_unaligned_le32(&id[60 << 1]); |
1da177e4 LT |
658 | |
659 | /* NOTE: obsolete in ATA 6 */ | |
f885f8d1 HH |
660 | d->geo.cylinders = get_unaligned_le16(&id[54 << 1]); |
661 | d->geo.heads = get_unaligned_le16(&id[55 << 1]); | |
662 | d->geo.sectors = get_unaligned_le16(&id[56 << 1]); | |
1da177e4 | 663 | } |
3ae1c24e EC |
664 | |
665 | if (d->ssize != ssize) | |
1d75981a | 666 | printk(KERN_INFO |
411c41ee HH |
667 | "aoe: %pm e%ld.%d v%04x has %llu sectors\n", |
668 | t->addr, | |
3ae1c24e EC |
669 | d->aoemajor, d->aoeminor, |
670 | d->fw_ver, (long long)ssize); | |
1da177e4 LT |
671 | d->ssize = ssize; |
672 | d->geo.start = 0; | |
6b9699bb EC |
673 | if (d->flags & (DEVFL_GDALLOC|DEVFL_NEWSIZE)) |
674 | return; | |
1da177e4 | 675 | if (d->gd != NULL) { |
80795aef | 676 | set_capacity(d->gd, ssize); |
3ae1c24e | 677 | d->flags |= DEVFL_NEWSIZE; |
68e0d42f | 678 | } else |
3ae1c24e | 679 | d->flags |= DEVFL_GDALLOC; |
1da177e4 | 680 | schedule_work(&d->work); |
1da177e4 LT |
681 | } |
682 | ||
683 | static void | |
684 | calc_rttavg(struct aoedev *d, int rtt) | |
685 | { | |
686 | register long n; | |
687 | ||
688 | n = rtt; | |
dced3a05 EC |
689 | if (n < 0) { |
690 | n = -rtt; | |
691 | if (n < MINTIMER) | |
692 | n = MINTIMER; | |
693 | else if (n > MAXTIMER) | |
694 | n = MAXTIMER; | |
695 | d->mintimer += (n - d->mintimer) >> 1; | |
696 | } else if (n < d->mintimer) | |
697 | n = d->mintimer; | |
1da177e4 LT |
698 | else if (n > MAXTIMER) |
699 | n = MAXTIMER; | |
700 | ||
701 | /* g == .25; cf. Congestion Avoidance and Control, Jacobson & Karels; 1988 */ | |
702 | n -= d->rttavg; | |
703 | d->rttavg += n >> 2; | |
704 | } | |
705 | ||
68e0d42f EC |
706 | static struct aoetgt * |
707 | gettgt(struct aoedev *d, char *addr) | |
708 | { | |
709 | struct aoetgt **t, **e; | |
710 | ||
711 | t = d->targets; | |
712 | e = t + NTARGETS; | |
713 | for (; t < e && *t; t++) | |
714 | if (memcmp((*t)->addr, addr, sizeof((*t)->addr)) == 0) | |
715 | return *t; | |
716 | return NULL; | |
717 | } | |
718 | ||
719 | static inline void | |
03054de1 | 720 | diskstats(struct gendisk *disk, struct bio *bio, ulong duration, sector_t sector) |
68e0d42f EC |
721 | { |
722 | unsigned long n_sect = bio->bi_size >> 9; | |
723 | const int rw = bio_data_dir(bio); | |
28f13702 | 724 | struct hd_struct *part; |
c9959059 | 725 | int cpu; |
68e0d42f | 726 | |
074a7aca | 727 | cpu = part_stat_lock(); |
e71bf0d0 | 728 | part = disk_map_sector_rcu(disk, sector); |
e71bf0d0 | 729 | |
074a7aca TH |
730 | part_stat_inc(cpu, part, ios[rw]); |
731 | part_stat_add(cpu, part, ticks[rw], duration); | |
732 | part_stat_add(cpu, part, sectors[rw], n_sect); | |
733 | part_stat_add(cpu, part, io_ticks, duration); | |
c9959059 | 734 | |
074a7aca | 735 | part_stat_unlock(); |
68e0d42f EC |
736 | } |
737 | ||
1da177e4 LT |
738 | void |
739 | aoecmd_ata_rsp(struct sk_buff *skb) | |
740 | { | |
e9bb8fb0 | 741 | struct sk_buff_head queue; |
1da177e4 | 742 | struct aoedev *d; |
ddec63e8 | 743 | struct aoe_hdr *hin, *hout; |
1da177e4 LT |
744 | struct aoe_atahdr *ahin, *ahout; |
745 | struct frame *f; | |
746 | struct buf *buf; | |
68e0d42f EC |
747 | struct aoetgt *t; |
748 | struct aoeif *ifp; | |
1da177e4 LT |
749 | register long n; |
750 | ulong flags; | |
751 | char ebuf[128]; | |
32465c65 | 752 | u16 aoemajor; |
753 | ||
abdbf94d | 754 | hin = (struct aoe_hdr *) skb_mac_header(skb); |
f885f8d1 | 755 | aoemajor = get_unaligned_be16(&hin->major); |
32465c65 | 756 | d = aoedev_by_aoeaddr(aoemajor, hin->minor); |
1da177e4 LT |
757 | if (d == NULL) { |
758 | snprintf(ebuf, sizeof ebuf, "aoecmd_ata_rsp: ata response " | |
759 | "for unknown device %d.%d\n", | |
32465c65 | 760 | aoemajor, hin->minor); |
1da177e4 LT |
761 | aoechr_error(ebuf); |
762 | return; | |
763 | } | |
764 | ||
765 | spin_lock_irqsave(&d->lock, flags); | |
766 | ||
f885f8d1 | 767 | n = get_unaligned_be32(&hin->tag); |
68e0d42f EC |
768 | t = gettgt(d, hin->src); |
769 | if (t == NULL) { | |
411c41ee HH |
770 | printk(KERN_INFO "aoe: can't find target e%ld.%d:%pm\n", |
771 | d->aoemajor, d->aoeminor, hin->src); | |
68e0d42f EC |
772 | spin_unlock_irqrestore(&d->lock, flags); |
773 | return; | |
774 | } | |
775 | f = getframe(t, n); | |
1da177e4 | 776 | if (f == NULL) { |
dced3a05 | 777 | calc_rttavg(d, -tsince(n)); |
1da177e4 LT |
778 | spin_unlock_irqrestore(&d->lock, flags); |
779 | snprintf(ebuf, sizeof ebuf, | |
780 | "%15s e%d.%d tag=%08x@%08lx\n", | |
781 | "unexpected rsp", | |
f885f8d1 | 782 | get_unaligned_be16(&hin->major), |
1da177e4 | 783 | hin->minor, |
f885f8d1 | 784 | get_unaligned_be32(&hin->tag), |
1da177e4 LT |
785 | jiffies); |
786 | aoechr_error(ebuf); | |
787 | return; | |
788 | } | |
789 | ||
790 | calc_rttavg(d, tsince(f->tag)); | |
791 | ||
792 | ahin = (struct aoe_atahdr *) (hin+1); | |
abdbf94d | 793 | hout = (struct aoe_hdr *) skb_mac_header(f->skb); |
ddec63e8 | 794 | ahout = (struct aoe_atahdr *) (hout+1); |
1da177e4 LT |
795 | buf = f->buf; |
796 | ||
797 | if (ahin->cmdstat & 0xa9) { /* these bits cleared on success */ | |
a12c93f0 | 798 | printk(KERN_ERR |
1d75981a | 799 | "aoe: ata error cmd=%2.2Xh stat=%2.2Xh from e%ld.%d\n", |
1da177e4 LT |
800 | ahout->cmdstat, ahin->cmdstat, |
801 | d->aoemajor, d->aoeminor); | |
802 | if (buf) | |
803 | buf->flags |= BUFFL_FAIL; | |
804 | } else { | |
68e0d42f EC |
805 | if (d->htgt && t == *d->htgt) /* I'll help myself, thank you. */ |
806 | d->htgt = NULL; | |
19bf2635 | 807 | n = ahout->scnt << 9; |
1da177e4 | 808 | switch (ahout->cmdstat) { |
04b3ab52 BZ |
809 | case ATA_CMD_PIO_READ: |
810 | case ATA_CMD_PIO_READ_EXT: | |
1da177e4 | 811 | if (skb->len - sizeof *hin - sizeof *ahin < n) { |
a12c93f0 | 812 | printk(KERN_ERR |
68e0d42f EC |
813 | "aoe: %s. skb->len=%d need=%ld\n", |
814 | "runt data size in read", skb->len, n); | |
1da177e4 LT |
815 | /* fail frame f? just returning will rexmit. */ |
816 | spin_unlock_irqrestore(&d->lock, flags); | |
817 | return; | |
818 | } | |
819 | memcpy(f->bufaddr, ahin+1, n); | |
04b3ab52 BZ |
820 | case ATA_CMD_PIO_WRITE: |
821 | case ATA_CMD_PIO_WRITE_EXT: | |
68e0d42f EC |
822 | ifp = getif(t, skb->dev); |
823 | if (ifp) { | |
824 | ifp->lost = 0; | |
825 | if (n > DEFAULTBCNT) | |
826 | ifp->lostjumbo = 0; | |
827 | } | |
19bf2635 | 828 | if (f->bcnt -= n) { |
68e0d42f | 829 | f->lba += n >> 9; |
19bf2635 | 830 | f->bufaddr += n; |
68e0d42f EC |
831 | resend(d, t, f); |
832 | goto xmit; | |
19bf2635 | 833 | } |
1da177e4 | 834 | break; |
04b3ab52 | 835 | case ATA_CMD_ID_ATA: |
1da177e4 | 836 | if (skb->len - sizeof *hin - sizeof *ahin < 512) { |
a12c93f0 EC |
837 | printk(KERN_INFO |
838 | "aoe: runt data size in ataid. skb->len=%d\n", | |
6bb6285f | 839 | skb->len); |
1da177e4 LT |
840 | spin_unlock_irqrestore(&d->lock, flags); |
841 | return; | |
842 | } | |
68e0d42f | 843 | ataid_complete(d, t, (char *) (ahin+1)); |
1da177e4 LT |
844 | break; |
845 | default: | |
a12c93f0 EC |
846 | printk(KERN_INFO |
847 | "aoe: unrecognized ata command %2.2Xh for %d.%d\n", | |
6bb6285f | 848 | ahout->cmdstat, |
f885f8d1 | 849 | get_unaligned_be16(&hin->major), |
6bb6285f | 850 | hin->minor); |
1da177e4 LT |
851 | } |
852 | } | |
853 | ||
68e0d42f | 854 | if (buf && --buf->nframesout == 0 && buf->resid == 0) { |
03054de1 | 855 | diskstats(d->gd, buf->bio, jiffies - buf->stime, buf->sector); |
0a1f127a PH |
856 | if (buf->flags & BUFFL_FAIL) |
857 | bio_endio(buf->bio, -EIO); | |
858 | else { | |
6ec1480d | 859 | bio_flush_dcache_pages(buf->bio); |
0a1f127a PH |
860 | bio_endio(buf->bio, 0); |
861 | } | |
68e0d42f | 862 | mempool_free(buf, d->bufpool); |
1da177e4 LT |
863 | } |
864 | ||
865 | f->buf = NULL; | |
866 | f->tag = FREETAG; | |
68e0d42f | 867 | t->nout--; |
1da177e4 LT |
868 | |
869 | aoecmd_work(d); | |
68e0d42f | 870 | xmit: |
e9bb8fb0 DM |
871 | __skb_queue_head_init(&queue); |
872 | skb_queue_splice_init(&d->sendq, &queue); | |
1da177e4 LT |
873 | |
874 | spin_unlock_irqrestore(&d->lock, flags); | |
e9bb8fb0 | 875 | aoenet_xmit(&queue); |
1da177e4 LT |
876 | } |
877 | ||
878 | void | |
879 | aoecmd_cfg(ushort aoemajor, unsigned char aoeminor) | |
880 | { | |
e9bb8fb0 | 881 | struct sk_buff_head queue; |
1da177e4 | 882 | |
e9bb8fb0 DM |
883 | __skb_queue_head_init(&queue); |
884 | aoecmd_cfg_pkts(aoemajor, aoeminor, &queue); | |
885 | aoenet_xmit(&queue); | |
1da177e4 LT |
886 | } |
887 | ||
68e0d42f | 888 | struct sk_buff * |
1da177e4 LT |
889 | aoecmd_ata_id(struct aoedev *d) |
890 | { | |
891 | struct aoe_hdr *h; | |
892 | struct aoe_atahdr *ah; | |
893 | struct frame *f; | |
894 | struct sk_buff *skb; | |
68e0d42f | 895 | struct aoetgt *t; |
1da177e4 | 896 | |
4f51dc5e | 897 | f = freeframe(d); |
68e0d42f | 898 | if (f == NULL) |
1da177e4 | 899 | return NULL; |
68e0d42f EC |
900 | |
901 | t = *d->tgt; | |
1da177e4 LT |
902 | |
903 | /* initialize the headers & frame */ | |
e407a7f6 | 904 | skb = f->skb; |
abdbf94d | 905 | h = (struct aoe_hdr *) skb_mac_header(skb); |
1da177e4 | 906 | ah = (struct aoe_atahdr *) (h+1); |
19900cde EC |
907 | skb_put(skb, sizeof *h + sizeof *ah); |
908 | memset(h, 0, skb->len); | |
68e0d42f EC |
909 | f->tag = aoehdr_atainit(d, t, h); |
910 | t->nout++; | |
1da177e4 | 911 | f->waited = 0; |
1da177e4 | 912 | |
1da177e4 LT |
913 | /* set up ata header */ |
914 | ah->scnt = 1; | |
04b3ab52 | 915 | ah->cmdstat = ATA_CMD_ID_ATA; |
1da177e4 LT |
916 | ah->lba3 = 0xa0; |
917 | ||
68e0d42f | 918 | skb->dev = t->ifp->nd; |
1da177e4 | 919 | |
3ae1c24e | 920 | d->rttavg = MAXTIMER; |
1da177e4 | 921 | d->timer.function = rexmit_timer; |
1da177e4 | 922 | |
4f51dc5e | 923 | return skb_clone(skb, GFP_ATOMIC); |
1da177e4 LT |
924 | } |
925 | ||
68e0d42f EC |
926 | static struct aoetgt * |
927 | addtgt(struct aoedev *d, char *addr, ulong nframes) | |
928 | { | |
929 | struct aoetgt *t, **tt, **te; | |
930 | struct frame *f, *e; | |
931 | ||
932 | tt = d->targets; | |
933 | te = tt + NTARGETS; | |
934 | for (; tt < te && *tt; tt++) | |
935 | ; | |
936 | ||
578c4aa0 EC |
937 | if (tt == te) { |
938 | printk(KERN_INFO | |
939 | "aoe: device addtgt failure; too many targets\n"); | |
68e0d42f | 940 | return NULL; |
578c4aa0 | 941 | } |
68e0d42f EC |
942 | t = kcalloc(1, sizeof *t, GFP_ATOMIC); |
943 | f = kcalloc(nframes, sizeof *f, GFP_ATOMIC); | |
578c4aa0 EC |
944 | if (!t || !f) { |
945 | kfree(f); | |
9bb237b6 | 946 | kfree(t); |
578c4aa0 | 947 | printk(KERN_INFO "aoe: cannot allocate memory to add target\n"); |
9bb237b6 EC |
948 | return NULL; |
949 | } | |
950 | ||
68e0d42f EC |
951 | t->nframes = nframes; |
952 | t->frames = f; | |
953 | e = f + nframes; | |
9bb237b6 | 954 | for (; f < e; f++) |
68e0d42f | 955 | f->tag = FREETAG; |
68e0d42f EC |
956 | memcpy(t->addr, addr, sizeof t->addr); |
957 | t->ifp = t->ifs; | |
958 | t->maxout = t->nframes; | |
959 | return *tt = t; | |
68e0d42f EC |
960 | } |
961 | ||
1da177e4 LT |
962 | void |
963 | aoecmd_cfg_rsp(struct sk_buff *skb) | |
964 | { | |
965 | struct aoedev *d; | |
966 | struct aoe_hdr *h; | |
967 | struct aoe_cfghdr *ch; | |
68e0d42f EC |
968 | struct aoetgt *t; |
969 | struct aoeif *ifp; | |
63e9cc5d | 970 | ulong flags, sysminor, aoemajor; |
1da177e4 | 971 | struct sk_buff *sl; |
19bf2635 | 972 | u16 n; |
1da177e4 | 973 | |
abdbf94d | 974 | h = (struct aoe_hdr *) skb_mac_header(skb); |
1da177e4 LT |
975 | ch = (struct aoe_cfghdr *) (h+1); |
976 | ||
977 | /* | |
978 | * Enough people have their dip switches set backwards to | |
979 | * warrant a loud message for this special case. | |
980 | */ | |
823ed72e | 981 | aoemajor = get_unaligned_be16(&h->major); |
1da177e4 | 982 | if (aoemajor == 0xfff) { |
a12c93f0 | 983 | printk(KERN_ERR "aoe: Warning: shelf address is all ones. " |
6bb6285f | 984 | "Check shelf dip switches.\n"); |
1da177e4 LT |
985 | return; |
986 | } | |
987 | ||
988 | sysminor = SYSMINOR(aoemajor, h->minor); | |
fc458dcd | 989 | if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) { |
a12c93f0 | 990 | printk(KERN_INFO "aoe: e%ld.%d: minor number too large\n", |
fc458dcd | 991 | aoemajor, (int) h->minor); |
1da177e4 LT |
992 | return; |
993 | } | |
994 | ||
19bf2635 | 995 | n = be16_to_cpu(ch->bufcnt); |
7df620d8 EC |
996 | if (n > aoe_maxout) /* keep it reasonable */ |
997 | n = aoe_maxout; | |
1da177e4 | 998 | |
68e0d42f | 999 | d = aoedev_by_sysminor_m(sysminor); |
1da177e4 | 1000 | if (d == NULL) { |
a12c93f0 | 1001 | printk(KERN_INFO "aoe: device sysminor_m failure\n"); |
1da177e4 LT |
1002 | return; |
1003 | } | |
1004 | ||
1005 | spin_lock_irqsave(&d->lock, flags); | |
1006 | ||
68e0d42f EC |
1007 | t = gettgt(d, h->src); |
1008 | if (!t) { | |
1009 | t = addtgt(d, h->src, n); | |
1010 | if (!t) { | |
68e0d42f EC |
1011 | spin_unlock_irqrestore(&d->lock, flags); |
1012 | return; | |
1013 | } | |
1014 | } | |
1015 | ifp = getif(t, skb->dev); | |
1016 | if (!ifp) { | |
1017 | ifp = addif(t, skb->dev); | |
1018 | if (!ifp) { | |
1019 | printk(KERN_INFO | |
1020 | "aoe: device addif failure; " | |
1021 | "too many interfaces?\n"); | |
1022 | spin_unlock_irqrestore(&d->lock, flags); | |
1023 | return; | |
1024 | } | |
1025 | } | |
1026 | if (ifp->maxbcnt) { | |
1027 | n = ifp->nd->mtu; | |
19bf2635 EC |
1028 | n -= sizeof (struct aoe_hdr) + sizeof (struct aoe_atahdr); |
1029 | n /= 512; | |
1030 | if (n > ch->scnt) | |
1031 | n = ch->scnt; | |
4f51dc5e | 1032 | n = n ? n * 512 : DEFAULTBCNT; |
68e0d42f | 1033 | if (n != ifp->maxbcnt) { |
a12c93f0 | 1034 | printk(KERN_INFO |
411c41ee | 1035 | "aoe: e%ld.%d: setting %d%s%s:%pm\n", |
68e0d42f EC |
1036 | d->aoemajor, d->aoeminor, n, |
1037 | " byte data frames on ", ifp->nd->name, | |
411c41ee | 1038 | t->addr); |
68e0d42f | 1039 | ifp->maxbcnt = n; |
4f51dc5e | 1040 | } |
19bf2635 | 1041 | } |
3ae1c24e EC |
1042 | |
1043 | /* don't change users' perspective */ | |
68e0d42f | 1044 | if (d->nopen) { |
1da177e4 LT |
1045 | spin_unlock_irqrestore(&d->lock, flags); |
1046 | return; | |
1047 | } | |
63e9cc5d | 1048 | d->fw_ver = be16_to_cpu(ch->fwver); |
1da177e4 | 1049 | |
68e0d42f | 1050 | sl = aoecmd_ata_id(d); |
1da177e4 LT |
1051 | |
1052 | spin_unlock_irqrestore(&d->lock, flags); | |
1053 | ||
e9bb8fb0 DM |
1054 | if (sl) { |
1055 | struct sk_buff_head queue; | |
1056 | __skb_queue_head_init(&queue); | |
1057 | __skb_queue_tail(&queue, sl); | |
1058 | aoenet_xmit(&queue); | |
1059 | } | |
1da177e4 LT |
1060 | } |
1061 | ||
68e0d42f EC |
1062 | void |
1063 | aoecmd_cleanslate(struct aoedev *d) | |
1064 | { | |
1065 | struct aoetgt **t, **te; | |
1066 | struct aoeif *p, *e; | |
1067 | ||
1068 | d->mintimer = MINTIMER; | |
1069 | ||
1070 | t = d->targets; | |
1071 | te = t + NTARGETS; | |
1072 | for (; t < te && *t; t++) { | |
1073 | (*t)->maxout = (*t)->nframes; | |
1074 | p = (*t)->ifs; | |
1075 | e = p + NAOEIFS; | |
1076 | for (; p < e; p++) { | |
1077 | p->lostjumbo = 0; | |
1078 | p->lost = 0; | |
1079 | p->maxbcnt = DEFAULTBCNT; | |
1080 | } | |
1081 | } | |
1082 | } |