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Commit | Line | Data |
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2611464d | 1 | /* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */ |
1da177e4 LT |
2 | /* |
3 | * aoecmd.c | |
4 | * Filesystem request handling methods | |
5 | */ | |
6 | ||
7 | #include <linux/hdreg.h> | |
8 | #include <linux/blkdev.h> | |
9 | #include <linux/skbuff.h> | |
10 | #include <linux/netdevice.h> | |
3ae1c24e | 11 | #include <linux/genhd.h> |
475172fb | 12 | #include <asm/unaligned.h> |
1da177e4 LT |
13 | #include "aoe.h" |
14 | ||
15 | #define TIMERTICK (HZ / 10) | |
16 | #define MINTIMER (2 * TIMERTICK) | |
17 | #define MAXTIMER (HZ << 1) | |
18 | #define MAXWAIT (60 * 3) /* After MAXWAIT seconds, give up and fail dev */ | |
19 | ||
e407a7f6 EC |
20 | struct sk_buff * |
21 | new_skb(ulong len) | |
1da177e4 LT |
22 | { |
23 | struct sk_buff *skb; | |
24 | ||
25 | skb = alloc_skb(len, GFP_ATOMIC); | |
26 | if (skb) { | |
27 | skb->nh.raw = skb->mac.raw = skb->data; | |
1da177e4 LT |
28 | skb->protocol = __constant_htons(ETH_P_AOE); |
29 | skb->priority = 0; | |
30 | skb_put(skb, len); | |
50bba752 | 31 | memset(skb->head, 0, len); |
1da177e4 LT |
32 | skb->next = skb->prev = NULL; |
33 | ||
34 | /* tell the network layer not to perform IP checksums | |
35 | * or to get the NIC to do it | |
36 | */ | |
37 | skb->ip_summed = CHECKSUM_NONE; | |
38 | } | |
39 | return skb; | |
40 | } | |
41 | ||
1da177e4 LT |
42 | static struct frame * |
43 | getframe(struct aoedev *d, int tag) | |
44 | { | |
45 | struct frame *f, *e; | |
46 | ||
47 | f = d->frames; | |
48 | e = f + d->nframes; | |
49 | for (; f<e; f++) | |
50 | if (f->tag == tag) | |
51 | return f; | |
52 | return NULL; | |
53 | } | |
54 | ||
55 | /* | |
56 | * Leave the top bit clear so we have tagspace for userland. | |
57 | * The bottom 16 bits are the xmit tick for rexmit/rttavg processing. | |
58 | * This driver reserves tag -1 to mean "unused frame." | |
59 | */ | |
60 | static int | |
61 | newtag(struct aoedev *d) | |
62 | { | |
63 | register ulong n; | |
64 | ||
65 | n = jiffies & 0xffff; | |
66 | return n |= (++d->lasttag & 0x7fff) << 16; | |
67 | } | |
68 | ||
69 | static int | |
70 | aoehdr_atainit(struct aoedev *d, struct aoe_hdr *h) | |
71 | { | |
1da177e4 | 72 | u32 host_tag = newtag(d); |
1da177e4 LT |
73 | |
74 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); | |
75 | memcpy(h->dst, d->addr, sizeof h->dst); | |
63e9cc5d | 76 | h->type = __constant_cpu_to_be16(ETH_P_AOE); |
1da177e4 | 77 | h->verfl = AOE_HVER; |
63e9cc5d | 78 | h->major = cpu_to_be16(d->aoemajor); |
1da177e4 LT |
79 | h->minor = d->aoeminor; |
80 | h->cmd = AOECMD_ATA; | |
63e9cc5d | 81 | h->tag = cpu_to_be32(host_tag); |
1da177e4 LT |
82 | |
83 | return host_tag; | |
84 | } | |
85 | ||
19bf2635 EC |
86 | static inline void |
87 | put_lba(struct aoe_atahdr *ah, sector_t lba) | |
88 | { | |
89 | ah->lba0 = lba; | |
90 | ah->lba1 = lba >>= 8; | |
91 | ah->lba2 = lba >>= 8; | |
92 | ah->lba3 = lba >>= 8; | |
93 | ah->lba4 = lba >>= 8; | |
94 | ah->lba5 = lba >>= 8; | |
95 | } | |
96 | ||
1da177e4 LT |
97 | static void |
98 | aoecmd_ata_rw(struct aoedev *d, struct frame *f) | |
99 | { | |
100 | struct aoe_hdr *h; | |
101 | struct aoe_atahdr *ah; | |
102 | struct buf *buf; | |
103 | struct sk_buff *skb; | |
104 | ulong bcnt; | |
105 | register sector_t sector; | |
106 | char writebit, extbit; | |
107 | ||
108 | writebit = 0x10; | |
109 | extbit = 0x4; | |
110 | ||
111 | buf = d->inprocess; | |
112 | ||
113 | sector = buf->sector; | |
114 | bcnt = buf->bv_resid; | |
19bf2635 EC |
115 | if (bcnt > d->maxbcnt) |
116 | bcnt = d->maxbcnt; | |
1da177e4 LT |
117 | |
118 | /* initialize the headers & frame */ | |
e407a7f6 EC |
119 | skb = f->skb; |
120 | h = (struct aoe_hdr *) skb->mac.raw; | |
1da177e4 | 121 | ah = (struct aoe_atahdr *) (h+1); |
e407a7f6 EC |
122 | skb->len = sizeof *h + sizeof *ah; |
123 | memset(h, 0, skb->len); | |
1da177e4 LT |
124 | f->tag = aoehdr_atainit(d, h); |
125 | f->waited = 0; | |
126 | f->buf = buf; | |
127 | f->bufaddr = buf->bufaddr; | |
19bf2635 EC |
128 | f->bcnt = bcnt; |
129 | f->lba = sector; | |
1da177e4 LT |
130 | |
131 | /* set up ata header */ | |
132 | ah->scnt = bcnt >> 9; | |
19bf2635 | 133 | put_lba(ah, sector); |
1da177e4 LT |
134 | if (d->flags & DEVFL_EXT) { |
135 | ah->aflags |= AOEAFL_EXT; | |
1da177e4 LT |
136 | } else { |
137 | extbit = 0; | |
138 | ah->lba3 &= 0x0f; | |
139 | ah->lba3 |= 0xe0; /* LBA bit + obsolete 0xa0 */ | |
140 | } | |
141 | ||
142 | if (bio_data_dir(buf->bio) == WRITE) { | |
e407a7f6 EC |
143 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), |
144 | offset_in_page(f->bufaddr), bcnt); | |
1da177e4 | 145 | ah->aflags |= AOEAFL_WRITE; |
1da177e4 | 146 | } else { |
e407a7f6 EC |
147 | skb_shinfo(skb)->nr_frags = 0; |
148 | skb->len = ETH_ZLEN; | |
1da177e4 | 149 | writebit = 0; |
1da177e4 LT |
150 | } |
151 | ||
152 | ah->cmdstat = WIN_READ | writebit | extbit; | |
153 | ||
154 | /* mark all tracking fields and load out */ | |
155 | buf->nframesout += 1; | |
156 | buf->bufaddr += bcnt; | |
157 | buf->bv_resid -= bcnt; | |
6bb6285f | 158 | /* dprintk("bv_resid=%ld\n", buf->bv_resid); */ |
1da177e4 LT |
159 | buf->resid -= bcnt; |
160 | buf->sector += bcnt >> 9; | |
161 | if (buf->resid == 0) { | |
162 | d->inprocess = NULL; | |
163 | } else if (buf->bv_resid == 0) { | |
164 | buf->bv++; | |
165 | buf->bv_resid = buf->bv->bv_len; | |
166 | buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset; | |
167 | } | |
168 | ||
e407a7f6 EC |
169 | skb->dev = d->ifp; |
170 | skb_get(skb); | |
171 | skb->next = NULL; | |
172 | if (d->sendq_hd) | |
173 | d->sendq_tl->next = skb; | |
174 | else | |
175 | d->sendq_hd = skb; | |
176 | d->sendq_tl = skb; | |
1da177e4 LT |
177 | } |
178 | ||
3ae1c24e EC |
179 | /* some callers cannot sleep, and they can call this function, |
180 | * transmitting the packets later, when interrupts are on | |
181 | */ | |
182 | static struct sk_buff * | |
183 | aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail) | |
184 | { | |
185 | struct aoe_hdr *h; | |
186 | struct aoe_cfghdr *ch; | |
187 | struct sk_buff *skb, *sl, *sl_tail; | |
188 | struct net_device *ifp; | |
189 | ||
190 | sl = sl_tail = NULL; | |
191 | ||
192 | read_lock(&dev_base_lock); | |
193 | for (ifp = dev_base; ifp; dev_put(ifp), ifp = ifp->next) { | |
194 | dev_hold(ifp); | |
195 | if (!is_aoe_netif(ifp)) | |
196 | continue; | |
197 | ||
e407a7f6 | 198 | skb = new_skb(sizeof *h + sizeof *ch); |
3ae1c24e | 199 | if (skb == NULL) { |
6bb6285f | 200 | iprintk("skb alloc failure\n"); |
3ae1c24e EC |
201 | continue; |
202 | } | |
e407a7f6 | 203 | skb->dev = ifp; |
3ae1c24e EC |
204 | if (sl_tail == NULL) |
205 | sl_tail = skb; | |
206 | h = (struct aoe_hdr *) skb->mac.raw; | |
207 | memset(h, 0, sizeof *h + sizeof *ch); | |
208 | ||
209 | memset(h->dst, 0xff, sizeof h->dst); | |
210 | memcpy(h->src, ifp->dev_addr, sizeof h->src); | |
211 | h->type = __constant_cpu_to_be16(ETH_P_AOE); | |
212 | h->verfl = AOE_HVER; | |
213 | h->major = cpu_to_be16(aoemajor); | |
214 | h->minor = aoeminor; | |
215 | h->cmd = AOECMD_CFG; | |
216 | ||
217 | skb->next = sl; | |
218 | sl = skb; | |
219 | } | |
220 | read_unlock(&dev_base_lock); | |
221 | ||
222 | if (tail != NULL) | |
223 | *tail = sl_tail; | |
224 | return sl; | |
225 | } | |
226 | ||
1da177e4 LT |
227 | /* enters with d->lock held */ |
228 | void | |
229 | aoecmd_work(struct aoedev *d) | |
230 | { | |
231 | struct frame *f; | |
232 | struct buf *buf; | |
3ae1c24e EC |
233 | |
234 | if (d->flags & DEVFL_PAUSE) { | |
235 | if (!aoedev_isbusy(d)) | |
236 | d->sendq_hd = aoecmd_cfg_pkts(d->aoemajor, | |
237 | d->aoeminor, &d->sendq_tl); | |
238 | return; | |
239 | } | |
240 | ||
1da177e4 LT |
241 | loop: |
242 | f = getframe(d, FREETAG); | |
243 | if (f == NULL) | |
244 | return; | |
245 | if (d->inprocess == NULL) { | |
246 | if (list_empty(&d->bufq)) | |
247 | return; | |
248 | buf = container_of(d->bufq.next, struct buf, bufs); | |
249 | list_del(d->bufq.next); | |
6bb6285f | 250 | /*dprintk("bi_size=%ld\n", buf->bio->bi_size); */ |
1da177e4 LT |
251 | d->inprocess = buf; |
252 | } | |
253 | aoecmd_ata_rw(d, f); | |
254 | goto loop; | |
255 | } | |
256 | ||
257 | static void | |
258 | rexmit(struct aoedev *d, struct frame *f) | |
259 | { | |
260 | struct sk_buff *skb; | |
261 | struct aoe_hdr *h; | |
19bf2635 | 262 | struct aoe_atahdr *ah; |
1da177e4 LT |
263 | char buf[128]; |
264 | u32 n; | |
1da177e4 LT |
265 | |
266 | n = newtag(d); | |
267 | ||
268 | snprintf(buf, sizeof buf, | |
269 | "%15s e%ld.%ld oldtag=%08x@%08lx newtag=%08x\n", | |
270 | "retransmit", | |
271 | d->aoemajor, d->aoeminor, f->tag, jiffies, n); | |
272 | aoechr_error(buf); | |
273 | ||
e407a7f6 EC |
274 | skb = f->skb; |
275 | h = (struct aoe_hdr *) skb->mac.raw; | |
19bf2635 | 276 | ah = (struct aoe_atahdr *) (h+1); |
1da177e4 | 277 | f->tag = n; |
63e9cc5d | 278 | h->tag = cpu_to_be32(n); |
2dd5e422 EC |
279 | memcpy(h->dst, d->addr, sizeof h->dst); |
280 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); | |
1da177e4 | 281 | |
19bf2635 EC |
282 | n = DEFAULTBCNT / 512; |
283 | if (ah->scnt > n) { | |
284 | ah->scnt = n; | |
285 | if (ah->aflags & AOEAFL_WRITE) | |
286 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), | |
287 | offset_in_page(f->bufaddr), DEFAULTBCNT); | |
288 | if (++d->lostjumbo > (d->nframes << 1)) | |
289 | if (d->maxbcnt != DEFAULTBCNT) { | |
6bb6285f | 290 | iprintk("too many lost jumbo - using 1KB frames.\n"); |
19bf2635 EC |
291 | d->maxbcnt = DEFAULTBCNT; |
292 | d->flags |= DEVFL_MAXBCNT; | |
293 | } | |
294 | } | |
295 | ||
e407a7f6 EC |
296 | skb->dev = d->ifp; |
297 | skb_get(skb); | |
298 | skb->next = NULL; | |
299 | if (d->sendq_hd) | |
300 | d->sendq_tl->next = skb; | |
301 | else | |
302 | d->sendq_hd = skb; | |
303 | d->sendq_tl = skb; | |
1da177e4 LT |
304 | } |
305 | ||
306 | static int | |
307 | tsince(int tag) | |
308 | { | |
309 | int n; | |
310 | ||
311 | n = jiffies & 0xffff; | |
312 | n -= tag & 0xffff; | |
313 | if (n < 0) | |
314 | n += 1<<16; | |
315 | return n; | |
316 | } | |
317 | ||
318 | static void | |
319 | rexmit_timer(ulong vp) | |
320 | { | |
321 | struct aoedev *d; | |
322 | struct frame *f, *e; | |
323 | struct sk_buff *sl; | |
324 | register long timeout; | |
325 | ulong flags, n; | |
326 | ||
327 | d = (struct aoedev *) vp; | |
328 | sl = NULL; | |
329 | ||
330 | /* timeout is always ~150% of the moving average */ | |
331 | timeout = d->rttavg; | |
332 | timeout += timeout >> 1; | |
333 | ||
334 | spin_lock_irqsave(&d->lock, flags); | |
335 | ||
336 | if (d->flags & DEVFL_TKILL) { | |
1c6f3fca | 337 | spin_unlock_irqrestore(&d->lock, flags); |
1da177e4 LT |
338 | return; |
339 | } | |
340 | f = d->frames; | |
341 | e = f + d->nframes; | |
342 | for (; f<e; f++) { | |
343 | if (f->tag != FREETAG && tsince(f->tag) >= timeout) { | |
344 | n = f->waited += timeout; | |
345 | n /= HZ; | |
346 | if (n > MAXWAIT) { /* waited too long. device failure. */ | |
347 | aoedev_downdev(d); | |
1c6f3fca | 348 | break; |
1da177e4 LT |
349 | } |
350 | rexmit(d, f); | |
351 | } | |
352 | } | |
353 | ||
a4b38364 EC |
354 | sl = d->sendq_hd; |
355 | d->sendq_hd = d->sendq_tl = NULL; | |
1da177e4 LT |
356 | if (sl) { |
357 | n = d->rttavg <<= 1; | |
358 | if (n > MAXTIMER) | |
359 | d->rttavg = MAXTIMER; | |
360 | } | |
361 | ||
362 | d->timer.expires = jiffies + TIMERTICK; | |
363 | add_timer(&d->timer); | |
364 | ||
365 | spin_unlock_irqrestore(&d->lock, flags); | |
366 | ||
367 | aoenet_xmit(sl); | |
368 | } | |
369 | ||
3ae1c24e EC |
370 | /* this function performs work that has been deferred until sleeping is OK |
371 | */ | |
372 | void | |
373 | aoecmd_sleepwork(void *vp) | |
374 | { | |
375 | struct aoedev *d = (struct aoedev *) vp; | |
376 | ||
377 | if (d->flags & DEVFL_GDALLOC) | |
378 | aoeblk_gdalloc(d); | |
379 | ||
380 | if (d->flags & DEVFL_NEWSIZE) { | |
381 | struct block_device *bd; | |
382 | unsigned long flags; | |
383 | u64 ssize; | |
384 | ||
385 | ssize = d->gd->capacity; | |
386 | bd = bdget_disk(d->gd, 0); | |
387 | ||
388 | if (bd) { | |
389 | mutex_lock(&bd->bd_inode->i_mutex); | |
390 | i_size_write(bd->bd_inode, (loff_t)ssize<<9); | |
391 | mutex_unlock(&bd->bd_inode->i_mutex); | |
392 | bdput(bd); | |
393 | } | |
394 | spin_lock_irqsave(&d->lock, flags); | |
395 | d->flags |= DEVFL_UP; | |
396 | d->flags &= ~DEVFL_NEWSIZE; | |
397 | spin_unlock_irqrestore(&d->lock, flags); | |
398 | } | |
399 | } | |
400 | ||
1da177e4 LT |
401 | static void |
402 | ataid_complete(struct aoedev *d, unsigned char *id) | |
403 | { | |
404 | u64 ssize; | |
405 | u16 n; | |
406 | ||
407 | /* word 83: command set supported */ | |
475172fb | 408 | n = le16_to_cpu(get_unaligned((__le16 *) &id[83<<1])); |
1da177e4 LT |
409 | |
410 | /* word 86: command set/feature enabled */ | |
475172fb | 411 | n |= le16_to_cpu(get_unaligned((__le16 *) &id[86<<1])); |
1da177e4 LT |
412 | |
413 | if (n & (1<<10)) { /* bit 10: LBA 48 */ | |
414 | d->flags |= DEVFL_EXT; | |
415 | ||
416 | /* word 100: number lba48 sectors */ | |
475172fb | 417 | ssize = le64_to_cpu(get_unaligned((__le64 *) &id[100<<1])); |
1da177e4 LT |
418 | |
419 | /* set as in ide-disk.c:init_idedisk_capacity */ | |
420 | d->geo.cylinders = ssize; | |
421 | d->geo.cylinders /= (255 * 63); | |
422 | d->geo.heads = 255; | |
423 | d->geo.sectors = 63; | |
424 | } else { | |
425 | d->flags &= ~DEVFL_EXT; | |
426 | ||
427 | /* number lba28 sectors */ | |
475172fb | 428 | ssize = le32_to_cpu(get_unaligned((__le32 *) &id[60<<1])); |
1da177e4 LT |
429 | |
430 | /* NOTE: obsolete in ATA 6 */ | |
475172fb EC |
431 | d->geo.cylinders = le16_to_cpu(get_unaligned((__le16 *) &id[54<<1])); |
432 | d->geo.heads = le16_to_cpu(get_unaligned((__le16 *) &id[55<<1])); | |
433 | d->geo.sectors = le16_to_cpu(get_unaligned((__le16 *) &id[56<<1])); | |
1da177e4 | 434 | } |
3ae1c24e EC |
435 | |
436 | if (d->ssize != ssize) | |
6bb6285f EC |
437 | iprintk("%012llx e%lu.%lu v%04x has %llu sectors\n", |
438 | (unsigned long long)mac_addr(d->addr), | |
3ae1c24e EC |
439 | d->aoemajor, d->aoeminor, |
440 | d->fw_ver, (long long)ssize); | |
1da177e4 LT |
441 | d->ssize = ssize; |
442 | d->geo.start = 0; | |
443 | if (d->gd != NULL) { | |
444 | d->gd->capacity = ssize; | |
3ae1c24e EC |
445 | d->flags |= DEVFL_NEWSIZE; |
446 | } else { | |
447 | if (d->flags & DEVFL_GDALLOC) { | |
6bb6285f | 448 | eprintk("can't schedule work for e%lu.%lu, %s\n", |
3ae1c24e | 449 | d->aoemajor, d->aoeminor, |
6bb6285f | 450 | "it's already on! This shouldn't happen.\n"); |
3ae1c24e EC |
451 | return; |
452 | } | |
453 | d->flags |= DEVFL_GDALLOC; | |
1da177e4 | 454 | } |
1da177e4 | 455 | schedule_work(&d->work); |
1da177e4 LT |
456 | } |
457 | ||
458 | static void | |
459 | calc_rttavg(struct aoedev *d, int rtt) | |
460 | { | |
461 | register long n; | |
462 | ||
463 | n = rtt; | |
dced3a05 EC |
464 | if (n < 0) { |
465 | n = -rtt; | |
466 | if (n < MINTIMER) | |
467 | n = MINTIMER; | |
468 | else if (n > MAXTIMER) | |
469 | n = MAXTIMER; | |
470 | d->mintimer += (n - d->mintimer) >> 1; | |
471 | } else if (n < d->mintimer) | |
472 | n = d->mintimer; | |
1da177e4 LT |
473 | else if (n > MAXTIMER) |
474 | n = MAXTIMER; | |
475 | ||
476 | /* g == .25; cf. Congestion Avoidance and Control, Jacobson & Karels; 1988 */ | |
477 | n -= d->rttavg; | |
478 | d->rttavg += n >> 2; | |
479 | } | |
480 | ||
481 | void | |
482 | aoecmd_ata_rsp(struct sk_buff *skb) | |
483 | { | |
484 | struct aoedev *d; | |
ddec63e8 | 485 | struct aoe_hdr *hin, *hout; |
1da177e4 LT |
486 | struct aoe_atahdr *ahin, *ahout; |
487 | struct frame *f; | |
488 | struct buf *buf; | |
489 | struct sk_buff *sl; | |
490 | register long n; | |
491 | ulong flags; | |
492 | char ebuf[128]; | |
32465c65 EC |
493 | u16 aoemajor; |
494 | ||
1da177e4 | 495 | hin = (struct aoe_hdr *) skb->mac.raw; |
63e9cc5d | 496 | aoemajor = be16_to_cpu(hin->major); |
32465c65 | 497 | d = aoedev_by_aoeaddr(aoemajor, hin->minor); |
1da177e4 LT |
498 | if (d == NULL) { |
499 | snprintf(ebuf, sizeof ebuf, "aoecmd_ata_rsp: ata response " | |
500 | "for unknown device %d.%d\n", | |
32465c65 | 501 | aoemajor, hin->minor); |
1da177e4 LT |
502 | aoechr_error(ebuf); |
503 | return; | |
504 | } | |
505 | ||
506 | spin_lock_irqsave(&d->lock, flags); | |
507 | ||
dced3a05 EC |
508 | n = be32_to_cpu(hin->tag); |
509 | f = getframe(d, n); | |
1da177e4 | 510 | if (f == NULL) { |
dced3a05 | 511 | calc_rttavg(d, -tsince(n)); |
1da177e4 LT |
512 | spin_unlock_irqrestore(&d->lock, flags); |
513 | snprintf(ebuf, sizeof ebuf, | |
514 | "%15s e%d.%d tag=%08x@%08lx\n", | |
515 | "unexpected rsp", | |
63e9cc5d | 516 | be16_to_cpu(hin->major), |
1da177e4 | 517 | hin->minor, |
63e9cc5d | 518 | be32_to_cpu(hin->tag), |
1da177e4 LT |
519 | jiffies); |
520 | aoechr_error(ebuf); | |
521 | return; | |
522 | } | |
523 | ||
524 | calc_rttavg(d, tsince(f->tag)); | |
525 | ||
526 | ahin = (struct aoe_atahdr *) (hin+1); | |
ddec63e8 EC |
527 | hout = (struct aoe_hdr *) f->skb->mac.raw; |
528 | ahout = (struct aoe_atahdr *) (hout+1); | |
1da177e4 LT |
529 | buf = f->buf; |
530 | ||
9d41965b EC |
531 | if (ahout->cmdstat == WIN_IDENTIFY) |
532 | d->flags &= ~DEVFL_PAUSE; | |
1da177e4 | 533 | if (ahin->cmdstat & 0xa9) { /* these bits cleared on success */ |
6bb6285f | 534 | eprintk("ata error cmd=%2.2Xh stat=%2.2Xh from e%ld.%ld\n", |
1da177e4 LT |
535 | ahout->cmdstat, ahin->cmdstat, |
536 | d->aoemajor, d->aoeminor); | |
537 | if (buf) | |
538 | buf->flags |= BUFFL_FAIL; | |
539 | } else { | |
19bf2635 | 540 | n = ahout->scnt << 9; |
1da177e4 LT |
541 | switch (ahout->cmdstat) { |
542 | case WIN_READ: | |
543 | case WIN_READ_EXT: | |
1da177e4 | 544 | if (skb->len - sizeof *hin - sizeof *ahin < n) { |
6bb6285f | 545 | eprintk("runt data size in read. skb->len=%d\n", |
1da177e4 LT |
546 | skb->len); |
547 | /* fail frame f? just returning will rexmit. */ | |
548 | spin_unlock_irqrestore(&d->lock, flags); | |
549 | return; | |
550 | } | |
551 | memcpy(f->bufaddr, ahin+1, n); | |
552 | case WIN_WRITE: | |
553 | case WIN_WRITE_EXT: | |
19bf2635 EC |
554 | if (f->bcnt -= n) { |
555 | f->bufaddr += n; | |
556 | put_lba(ahout, f->lba += ahout->scnt); | |
6bb6285f EC |
557 | n = f->bcnt; |
558 | if (n > DEFAULTBCNT) | |
559 | n = DEFAULTBCNT; | |
19bf2635 EC |
560 | ahout->scnt = n >> 9; |
561 | if (ahout->aflags & AOEAFL_WRITE) | |
6bb6285f EC |
562 | skb_fill_page_desc(f->skb, 0, |
563 | virt_to_page(f->bufaddr), | |
19bf2635 | 564 | offset_in_page(f->bufaddr), n); |
ddec63e8 EC |
565 | f->tag = newtag(d); |
566 | hout->tag = cpu_to_be32(f->tag); | |
567 | skb->dev = d->ifp; | |
19bf2635 EC |
568 | skb_get(f->skb); |
569 | f->skb->next = NULL; | |
570 | spin_unlock_irqrestore(&d->lock, flags); | |
571 | aoenet_xmit(f->skb); | |
572 | return; | |
573 | } | |
574 | if (n > DEFAULTBCNT) | |
575 | d->lostjumbo = 0; | |
1da177e4 LT |
576 | break; |
577 | case WIN_IDENTIFY: | |
578 | if (skb->len - sizeof *hin - sizeof *ahin < 512) { | |
6bb6285f EC |
579 | iprintk("runt data size in ataid. skb->len=%d\n", |
580 | skb->len); | |
1da177e4 LT |
581 | spin_unlock_irqrestore(&d->lock, flags); |
582 | return; | |
583 | } | |
584 | ataid_complete(d, (char *) (ahin+1)); | |
1da177e4 LT |
585 | break; |
586 | default: | |
6bb6285f EC |
587 | iprintk("unrecognized ata command %2.2Xh for %d.%d\n", |
588 | ahout->cmdstat, | |
589 | be16_to_cpu(hin->major), | |
590 | hin->minor); | |
1da177e4 LT |
591 | } |
592 | } | |
593 | ||
594 | if (buf) { | |
595 | buf->nframesout -= 1; | |
596 | if (buf->nframesout == 0 && buf->resid == 0) { | |
0c6f0e79 EC |
597 | unsigned long duration = jiffies - buf->start_time; |
598 | unsigned long n_sect = buf->bio->bi_size >> 9; | |
599 | struct gendisk *disk = d->gd; | |
496456c2 | 600 | const int rw = bio_data_dir(buf->bio); |
0c6f0e79 | 601 | |
496456c2 JA |
602 | disk_stat_inc(disk, ios[rw]); |
603 | disk_stat_add(disk, ticks[rw], duration); | |
604 | disk_stat_add(disk, sectors[rw], n_sect); | |
0c6f0e79 | 605 | disk_stat_add(disk, io_ticks, duration); |
1da177e4 LT |
606 | n = (buf->flags & BUFFL_FAIL) ? -EIO : 0; |
607 | bio_endio(buf->bio, buf->bio->bi_size, n); | |
608 | mempool_free(buf, d->bufpool); | |
609 | } | |
610 | } | |
611 | ||
612 | f->buf = NULL; | |
613 | f->tag = FREETAG; | |
614 | ||
615 | aoecmd_work(d); | |
a4b38364 EC |
616 | sl = d->sendq_hd; |
617 | d->sendq_hd = d->sendq_tl = NULL; | |
1da177e4 LT |
618 | |
619 | spin_unlock_irqrestore(&d->lock, flags); | |
1da177e4 LT |
620 | aoenet_xmit(sl); |
621 | } | |
622 | ||
623 | void | |
624 | aoecmd_cfg(ushort aoemajor, unsigned char aoeminor) | |
625 | { | |
3ae1c24e | 626 | struct sk_buff *sl; |
1da177e4 | 627 | |
3ae1c24e | 628 | sl = aoecmd_cfg_pkts(aoemajor, aoeminor, NULL); |
1da177e4 LT |
629 | |
630 | aoenet_xmit(sl); | |
631 | } | |
632 | ||
633 | /* | |
634 | * Since we only call this in one place (and it only prepares one frame) | |
a4b38364 | 635 | * we just return the skb. Usually we'd chain it up to the aoedev sendq. |
1da177e4 LT |
636 | */ |
637 | static struct sk_buff * | |
638 | aoecmd_ata_id(struct aoedev *d) | |
639 | { | |
640 | struct aoe_hdr *h; | |
641 | struct aoe_atahdr *ah; | |
642 | struct frame *f; | |
643 | struct sk_buff *skb; | |
644 | ||
645 | f = getframe(d, FREETAG); | |
646 | if (f == NULL) { | |
6bb6285f | 647 | eprintk("can't get a frame. This shouldn't happen.\n"); |
1da177e4 LT |
648 | return NULL; |
649 | } | |
650 | ||
651 | /* initialize the headers & frame */ | |
e407a7f6 EC |
652 | skb = f->skb; |
653 | h = (struct aoe_hdr *) skb->mac.raw; | |
1da177e4 | 654 | ah = (struct aoe_atahdr *) (h+1); |
e407a7f6 EC |
655 | skb->len = sizeof *h + sizeof *ah; |
656 | memset(h, 0, skb->len); | |
1da177e4 LT |
657 | f->tag = aoehdr_atainit(d, h); |
658 | f->waited = 0; | |
1da177e4 | 659 | |
1da177e4 LT |
660 | /* set up ata header */ |
661 | ah->scnt = 1; | |
662 | ah->cmdstat = WIN_IDENTIFY; | |
663 | ah->lba3 = 0xa0; | |
664 | ||
e407a7f6 EC |
665 | skb->dev = d->ifp; |
666 | skb_get(skb); | |
1da177e4 | 667 | |
3ae1c24e | 668 | d->rttavg = MAXTIMER; |
1da177e4 | 669 | d->timer.function = rexmit_timer; |
1da177e4 LT |
670 | |
671 | return skb; | |
672 | } | |
673 | ||
674 | void | |
675 | aoecmd_cfg_rsp(struct sk_buff *skb) | |
676 | { | |
677 | struct aoedev *d; | |
678 | struct aoe_hdr *h; | |
679 | struct aoe_cfghdr *ch; | |
63e9cc5d | 680 | ulong flags, sysminor, aoemajor; |
1da177e4 | 681 | struct sk_buff *sl; |
eaf0a3cb | 682 | enum { MAXFRAMES = 16 }; |
19bf2635 | 683 | u16 n; |
1da177e4 LT |
684 | |
685 | h = (struct aoe_hdr *) skb->mac.raw; | |
686 | ch = (struct aoe_cfghdr *) (h+1); | |
687 | ||
688 | /* | |
689 | * Enough people have their dip switches set backwards to | |
690 | * warrant a loud message for this special case. | |
691 | */ | |
63e9cc5d | 692 | aoemajor = be16_to_cpu(h->major); |
1da177e4 | 693 | if (aoemajor == 0xfff) { |
6bb6285f EC |
694 | eprintk("Warning: shelf address is all ones. " |
695 | "Check shelf dip switches.\n"); | |
1da177e4 LT |
696 | return; |
697 | } | |
698 | ||
699 | sysminor = SYSMINOR(aoemajor, h->minor); | |
fc458dcd | 700 | if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) { |
6bb6285f | 701 | iprintk("e%ld.%d: minor number too large\n", |
fc458dcd | 702 | aoemajor, (int) h->minor); |
1da177e4 LT |
703 | return; |
704 | } | |
705 | ||
19bf2635 EC |
706 | n = be16_to_cpu(ch->bufcnt); |
707 | if (n > MAXFRAMES) /* keep it reasonable */ | |
708 | n = MAXFRAMES; | |
1da177e4 | 709 | |
19bf2635 | 710 | d = aoedev_by_sysminor_m(sysminor, n); |
1da177e4 | 711 | if (d == NULL) { |
6bb6285f | 712 | iprintk("device sysminor_m failure\n"); |
1da177e4 LT |
713 | return; |
714 | } | |
715 | ||
716 | spin_lock_irqsave(&d->lock, flags); | |
717 | ||
3ae1c24e EC |
718 | /* permit device to migrate mac and network interface */ |
719 | d->ifp = skb->dev; | |
720 | memcpy(d->addr, h->src, sizeof d->addr); | |
19bf2635 EC |
721 | if (!(d->flags & DEVFL_MAXBCNT)) { |
722 | n = d->ifp->mtu; | |
723 | n -= sizeof (struct aoe_hdr) + sizeof (struct aoe_atahdr); | |
724 | n /= 512; | |
725 | if (n > ch->scnt) | |
726 | n = ch->scnt; | |
727 | d->maxbcnt = n ? n * 512 : DEFAULTBCNT; | |
728 | } | |
3ae1c24e EC |
729 | |
730 | /* don't change users' perspective */ | |
731 | if (d->nopen && !(d->flags & DEVFL_PAUSE)) { | |
1da177e4 LT |
732 | spin_unlock_irqrestore(&d->lock, flags); |
733 | return; | |
734 | } | |
3ae1c24e | 735 | d->flags |= DEVFL_PAUSE; /* force pause */ |
dced3a05 | 736 | d->mintimer = MINTIMER; |
63e9cc5d | 737 | d->fw_ver = be16_to_cpu(ch->fwver); |
1da177e4 | 738 | |
3ae1c24e EC |
739 | /* check for already outstanding ataid */ |
740 | sl = aoedev_isbusy(d) == 0 ? aoecmd_ata_id(d) : NULL; | |
1da177e4 LT |
741 | |
742 | spin_unlock_irqrestore(&d->lock, flags); | |
743 | ||
744 | aoenet_xmit(sl); | |
745 | } | |
746 |