Commit | Line | Data |
---|---|---|
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) | |
b751e8b6 EC |
18 | |
19 | static int aoe_deadsecs = 60 * 3; | |
20 | module_param(aoe_deadsecs, int, 0644); | |
21 | MODULE_PARM_DESC(aoe_deadsecs, "After aoe_deadsecs seconds, give up and fail dev."); | |
1da177e4 | 22 | |
e407a7f6 EC |
23 | struct sk_buff * |
24 | new_skb(ulong len) | |
1da177e4 LT |
25 | { |
26 | struct sk_buff *skb; | |
27 | ||
28 | skb = alloc_skb(len, GFP_ATOMIC); | |
29 | if (skb) { | |
30 | skb->nh.raw = skb->mac.raw = skb->data; | |
1da177e4 LT |
31 | skb->protocol = __constant_htons(ETH_P_AOE); |
32 | skb->priority = 0; | |
33 | skb_put(skb, len); | |
50bba752 | 34 | memset(skb->head, 0, len); |
1da177e4 LT |
35 | skb->next = skb->prev = NULL; |
36 | ||
37 | /* tell the network layer not to perform IP checksums | |
38 | * or to get the NIC to do it | |
39 | */ | |
40 | skb->ip_summed = CHECKSUM_NONE; | |
41 | } | |
42 | return skb; | |
43 | } | |
44 | ||
1da177e4 LT |
45 | static struct frame * |
46 | getframe(struct aoedev *d, int tag) | |
47 | { | |
48 | struct frame *f, *e; | |
49 | ||
50 | f = d->frames; | |
51 | e = f + d->nframes; | |
52 | for (; f<e; f++) | |
53 | if (f->tag == tag) | |
54 | return f; | |
55 | return NULL; | |
56 | } | |
57 | ||
58 | /* | |
59 | * Leave the top bit clear so we have tagspace for userland. | |
60 | * The bottom 16 bits are the xmit tick for rexmit/rttavg processing. | |
61 | * This driver reserves tag -1 to mean "unused frame." | |
62 | */ | |
63 | static int | |
64 | newtag(struct aoedev *d) | |
65 | { | |
66 | register ulong n; | |
67 | ||
68 | n = jiffies & 0xffff; | |
69 | return n |= (++d->lasttag & 0x7fff) << 16; | |
70 | } | |
71 | ||
72 | static int | |
73 | aoehdr_atainit(struct aoedev *d, struct aoe_hdr *h) | |
74 | { | |
1da177e4 | 75 | u32 host_tag = newtag(d); |
1da177e4 LT |
76 | |
77 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); | |
78 | memcpy(h->dst, d->addr, sizeof h->dst); | |
63e9cc5d | 79 | h->type = __constant_cpu_to_be16(ETH_P_AOE); |
1da177e4 | 80 | h->verfl = AOE_HVER; |
63e9cc5d | 81 | h->major = cpu_to_be16(d->aoemajor); |
1da177e4 LT |
82 | h->minor = d->aoeminor; |
83 | h->cmd = AOECMD_ATA; | |
63e9cc5d | 84 | h->tag = cpu_to_be32(host_tag); |
1da177e4 LT |
85 | |
86 | return host_tag; | |
87 | } | |
88 | ||
19bf2635 EC |
89 | static inline void |
90 | put_lba(struct aoe_atahdr *ah, sector_t lba) | |
91 | { | |
92 | ah->lba0 = lba; | |
93 | ah->lba1 = lba >>= 8; | |
94 | ah->lba2 = lba >>= 8; | |
95 | ah->lba3 = lba >>= 8; | |
96 | ah->lba4 = lba >>= 8; | |
97 | ah->lba5 = lba >>= 8; | |
98 | } | |
99 | ||
1da177e4 LT |
100 | static void |
101 | aoecmd_ata_rw(struct aoedev *d, struct frame *f) | |
102 | { | |
103 | struct aoe_hdr *h; | |
104 | struct aoe_atahdr *ah; | |
105 | struct buf *buf; | |
106 | struct sk_buff *skb; | |
107 | ulong bcnt; | |
108 | register sector_t sector; | |
109 | char writebit, extbit; | |
110 | ||
111 | writebit = 0x10; | |
112 | extbit = 0x4; | |
113 | ||
114 | buf = d->inprocess; | |
115 | ||
116 | sector = buf->sector; | |
117 | bcnt = buf->bv_resid; | |
19bf2635 EC |
118 | if (bcnt > d->maxbcnt) |
119 | bcnt = d->maxbcnt; | |
1da177e4 LT |
120 | |
121 | /* initialize the headers & frame */ | |
e407a7f6 EC |
122 | skb = f->skb; |
123 | h = (struct aoe_hdr *) skb->mac.raw; | |
1da177e4 | 124 | ah = (struct aoe_atahdr *) (h+1); |
e407a7f6 | 125 | skb->len = sizeof *h + sizeof *ah; |
4f51dc5e | 126 | memset(h, 0, ETH_ZLEN); |
1da177e4 LT |
127 | f->tag = aoehdr_atainit(d, h); |
128 | f->waited = 0; | |
129 | f->buf = buf; | |
130 | f->bufaddr = buf->bufaddr; | |
19bf2635 EC |
131 | f->bcnt = bcnt; |
132 | f->lba = sector; | |
1da177e4 LT |
133 | |
134 | /* set up ata header */ | |
135 | ah->scnt = bcnt >> 9; | |
19bf2635 | 136 | put_lba(ah, sector); |
1da177e4 LT |
137 | if (d->flags & DEVFL_EXT) { |
138 | ah->aflags |= AOEAFL_EXT; | |
1da177e4 LT |
139 | } else { |
140 | extbit = 0; | |
141 | ah->lba3 &= 0x0f; | |
142 | ah->lba3 |= 0xe0; /* LBA bit + obsolete 0xa0 */ | |
143 | } | |
144 | ||
145 | if (bio_data_dir(buf->bio) == WRITE) { | |
e407a7f6 EC |
146 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), |
147 | offset_in_page(f->bufaddr), bcnt); | |
1da177e4 | 148 | ah->aflags |= AOEAFL_WRITE; |
4f51dc5e EC |
149 | skb->len += bcnt; |
150 | skb->data_len = bcnt; | |
1da177e4 | 151 | } else { |
e407a7f6 | 152 | skb->len = ETH_ZLEN; |
1da177e4 | 153 | writebit = 0; |
1da177e4 LT |
154 | } |
155 | ||
156 | ah->cmdstat = WIN_READ | writebit | extbit; | |
157 | ||
158 | /* mark all tracking fields and load out */ | |
159 | buf->nframesout += 1; | |
160 | buf->bufaddr += bcnt; | |
161 | buf->bv_resid -= bcnt; | |
a12c93f0 | 162 | /* printk(KERN_DEBUG "aoe: bv_resid=%ld\n", buf->bv_resid); */ |
1da177e4 LT |
163 | buf->resid -= bcnt; |
164 | buf->sector += bcnt >> 9; | |
165 | if (buf->resid == 0) { | |
166 | d->inprocess = NULL; | |
167 | } else if (buf->bv_resid == 0) { | |
168 | buf->bv++; | |
392e4845 | 169 | WARN_ON(buf->bv->bv_len == 0); |
1da177e4 LT |
170 | buf->bv_resid = buf->bv->bv_len; |
171 | buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset; | |
172 | } | |
173 | ||
e407a7f6 | 174 | skb->dev = d->ifp; |
4f51dc5e EC |
175 | skb = skb_clone(skb, GFP_ATOMIC); |
176 | if (skb == NULL) | |
177 | return; | |
e407a7f6 EC |
178 | if (d->sendq_hd) |
179 | d->sendq_tl->next = skb; | |
180 | else | |
181 | d->sendq_hd = skb; | |
182 | d->sendq_tl = skb; | |
1da177e4 LT |
183 | } |
184 | ||
3ae1c24e EC |
185 | /* some callers cannot sleep, and they can call this function, |
186 | * transmitting the packets later, when interrupts are on | |
187 | */ | |
188 | static struct sk_buff * | |
189 | aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail) | |
190 | { | |
191 | struct aoe_hdr *h; | |
192 | struct aoe_cfghdr *ch; | |
193 | struct sk_buff *skb, *sl, *sl_tail; | |
194 | struct net_device *ifp; | |
195 | ||
196 | sl = sl_tail = NULL; | |
197 | ||
198 | read_lock(&dev_base_lock); | |
199 | for (ifp = dev_base; ifp; dev_put(ifp), ifp = ifp->next) { | |
200 | dev_hold(ifp); | |
201 | if (!is_aoe_netif(ifp)) | |
202 | continue; | |
203 | ||
e407a7f6 | 204 | skb = new_skb(sizeof *h + sizeof *ch); |
3ae1c24e | 205 | if (skb == NULL) { |
a12c93f0 | 206 | printk(KERN_INFO "aoe: skb alloc failure\n"); |
3ae1c24e EC |
207 | continue; |
208 | } | |
e407a7f6 | 209 | skb->dev = ifp; |
3ae1c24e EC |
210 | if (sl_tail == NULL) |
211 | sl_tail = skb; | |
212 | h = (struct aoe_hdr *) skb->mac.raw; | |
213 | memset(h, 0, sizeof *h + sizeof *ch); | |
214 | ||
215 | memset(h->dst, 0xff, sizeof h->dst); | |
216 | memcpy(h->src, ifp->dev_addr, sizeof h->src); | |
217 | h->type = __constant_cpu_to_be16(ETH_P_AOE); | |
218 | h->verfl = AOE_HVER; | |
219 | h->major = cpu_to_be16(aoemajor); | |
220 | h->minor = aoeminor; | |
221 | h->cmd = AOECMD_CFG; | |
222 | ||
223 | skb->next = sl; | |
224 | sl = skb; | |
225 | } | |
226 | read_unlock(&dev_base_lock); | |
227 | ||
228 | if (tail != NULL) | |
229 | *tail = sl_tail; | |
230 | return sl; | |
231 | } | |
232 | ||
4f51dc5e EC |
233 | static struct frame * |
234 | freeframe(struct aoedev *d) | |
235 | { | |
236 | struct frame *f, *e; | |
237 | int n = 0; | |
238 | ||
239 | f = d->frames; | |
240 | e = f + d->nframes; | |
241 | for (; f<e; f++) { | |
242 | if (f->tag != FREETAG) | |
243 | continue; | |
244 | if (atomic_read(&skb_shinfo(f->skb)->dataref) == 1) { | |
245 | skb_shinfo(f->skb)->nr_frags = f->skb->data_len = 0; | |
246 | return f; | |
247 | } | |
248 | n++; | |
249 | } | |
250 | if (n == d->nframes) /* wait for network layer */ | |
251 | d->flags |= DEVFL_KICKME; | |
252 | ||
253 | return NULL; | |
254 | } | |
255 | ||
1da177e4 LT |
256 | /* enters with d->lock held */ |
257 | void | |
258 | aoecmd_work(struct aoedev *d) | |
259 | { | |
260 | struct frame *f; | |
261 | struct buf *buf; | |
3ae1c24e EC |
262 | |
263 | if (d->flags & DEVFL_PAUSE) { | |
264 | if (!aoedev_isbusy(d)) | |
265 | d->sendq_hd = aoecmd_cfg_pkts(d->aoemajor, | |
266 | d->aoeminor, &d->sendq_tl); | |
267 | return; | |
268 | } | |
269 | ||
1da177e4 | 270 | loop: |
4f51dc5e | 271 | f = freeframe(d); |
1da177e4 LT |
272 | if (f == NULL) |
273 | return; | |
274 | if (d->inprocess == NULL) { | |
275 | if (list_empty(&d->bufq)) | |
276 | return; | |
277 | buf = container_of(d->bufq.next, struct buf, bufs); | |
278 | list_del(d->bufq.next); | |
a12c93f0 | 279 | /*printk(KERN_DEBUG "aoe: bi_size=%ld\n", buf->bio->bi_size); */ |
1da177e4 LT |
280 | d->inprocess = buf; |
281 | } | |
282 | aoecmd_ata_rw(d, f); | |
283 | goto loop; | |
284 | } | |
285 | ||
286 | static void | |
287 | rexmit(struct aoedev *d, struct frame *f) | |
288 | { | |
289 | struct sk_buff *skb; | |
290 | struct aoe_hdr *h; | |
19bf2635 | 291 | struct aoe_atahdr *ah; |
1da177e4 LT |
292 | char buf[128]; |
293 | u32 n; | |
1da177e4 LT |
294 | |
295 | n = newtag(d); | |
296 | ||
297 | snprintf(buf, sizeof buf, | |
298 | "%15s e%ld.%ld oldtag=%08x@%08lx newtag=%08x\n", | |
299 | "retransmit", | |
300 | d->aoemajor, d->aoeminor, f->tag, jiffies, n); | |
301 | aoechr_error(buf); | |
302 | ||
e407a7f6 EC |
303 | skb = f->skb; |
304 | h = (struct aoe_hdr *) skb->mac.raw; | |
19bf2635 | 305 | ah = (struct aoe_atahdr *) (h+1); |
1da177e4 | 306 | f->tag = n; |
63e9cc5d | 307 | h->tag = cpu_to_be32(n); |
2dd5e422 EC |
308 | memcpy(h->dst, d->addr, sizeof h->dst); |
309 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); | |
1da177e4 | 310 | |
19bf2635 EC |
311 | n = DEFAULTBCNT / 512; |
312 | if (ah->scnt > n) { | |
313 | ah->scnt = n; | |
4f51dc5e | 314 | if (ah->aflags & AOEAFL_WRITE) { |
19bf2635 EC |
315 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), |
316 | offset_in_page(f->bufaddr), DEFAULTBCNT); | |
4f51dc5e EC |
317 | skb->len = sizeof *h + sizeof *ah + DEFAULTBCNT; |
318 | skb->data_len = DEFAULTBCNT; | |
319 | } | |
19bf2635 EC |
320 | if (++d->lostjumbo > (d->nframes << 1)) |
321 | if (d->maxbcnt != DEFAULTBCNT) { | |
a12c93f0 | 322 | printk(KERN_INFO "aoe: e%ld.%ld: too many lost jumbo on %s - using 1KB frames.\n", |
4f51dc5e | 323 | d->aoemajor, d->aoeminor, d->ifp->name); |
19bf2635 EC |
324 | d->maxbcnt = DEFAULTBCNT; |
325 | d->flags |= DEVFL_MAXBCNT; | |
326 | } | |
327 | } | |
328 | ||
e407a7f6 | 329 | skb->dev = d->ifp; |
4f51dc5e EC |
330 | skb = skb_clone(skb, GFP_ATOMIC); |
331 | if (skb == NULL) | |
332 | return; | |
e407a7f6 EC |
333 | if (d->sendq_hd) |
334 | d->sendq_tl->next = skb; | |
335 | else | |
336 | d->sendq_hd = skb; | |
337 | d->sendq_tl = skb; | |
1da177e4 LT |
338 | } |
339 | ||
340 | static int | |
341 | tsince(int tag) | |
342 | { | |
343 | int n; | |
344 | ||
345 | n = jiffies & 0xffff; | |
346 | n -= tag & 0xffff; | |
347 | if (n < 0) | |
348 | n += 1<<16; | |
349 | return n; | |
350 | } | |
351 | ||
352 | static void | |
353 | rexmit_timer(ulong vp) | |
354 | { | |
355 | struct aoedev *d; | |
356 | struct frame *f, *e; | |
357 | struct sk_buff *sl; | |
358 | register long timeout; | |
359 | ulong flags, n; | |
360 | ||
361 | d = (struct aoedev *) vp; | |
362 | sl = NULL; | |
363 | ||
364 | /* timeout is always ~150% of the moving average */ | |
365 | timeout = d->rttavg; | |
366 | timeout += timeout >> 1; | |
367 | ||
368 | spin_lock_irqsave(&d->lock, flags); | |
369 | ||
370 | if (d->flags & DEVFL_TKILL) { | |
1c6f3fca | 371 | spin_unlock_irqrestore(&d->lock, flags); |
1da177e4 LT |
372 | return; |
373 | } | |
374 | f = d->frames; | |
375 | e = f + d->nframes; | |
376 | for (; f<e; f++) { | |
377 | if (f->tag != FREETAG && tsince(f->tag) >= timeout) { | |
378 | n = f->waited += timeout; | |
379 | n /= HZ; | |
b751e8b6 | 380 | if (n > aoe_deadsecs) { /* waited too long for response */ |
1da177e4 | 381 | aoedev_downdev(d); |
1c6f3fca | 382 | break; |
1da177e4 LT |
383 | } |
384 | rexmit(d, f); | |
385 | } | |
386 | } | |
4f51dc5e EC |
387 | if (d->flags & DEVFL_KICKME) { |
388 | d->flags &= ~DEVFL_KICKME; | |
389 | aoecmd_work(d); | |
390 | } | |
1da177e4 | 391 | |
a4b38364 | 392 | sl = d->sendq_hd; |
393 | d->sendq_hd = d->sendq_tl = NULL; | |
1da177e4 LT |
394 | if (sl) { |
395 | n = d->rttavg <<= 1; | |
396 | if (n > MAXTIMER) | |
397 | d->rttavg = MAXTIMER; | |
398 | } | |
399 | ||
400 | d->timer.expires = jiffies + TIMERTICK; | |
401 | add_timer(&d->timer); | |
402 | ||
403 | spin_unlock_irqrestore(&d->lock, flags); | |
404 | ||
405 | aoenet_xmit(sl); | |
406 | } | |
407 | ||
3ae1c24e EC |
408 | /* this function performs work that has been deferred until sleeping is OK |
409 | */ | |
410 | void | |
c4028958 | 411 | aoecmd_sleepwork(struct work_struct *work) |
3ae1c24e | 412 | { |
c4028958 | 413 | struct aoedev *d = container_of(work, struct aoedev, work); |
3ae1c24e EC |
414 | |
415 | if (d->flags & DEVFL_GDALLOC) | |
416 | aoeblk_gdalloc(d); | |
417 | ||
418 | if (d->flags & DEVFL_NEWSIZE) { | |
419 | struct block_device *bd; | |
420 | unsigned long flags; | |
421 | u64 ssize; | |
422 | ||
423 | ssize = d->gd->capacity; | |
424 | bd = bdget_disk(d->gd, 0); | |
425 | ||
426 | if (bd) { | |
427 | mutex_lock(&bd->bd_inode->i_mutex); | |
428 | i_size_write(bd->bd_inode, (loff_t)ssize<<9); | |
429 | mutex_unlock(&bd->bd_inode->i_mutex); | |
430 | bdput(bd); | |
431 | } | |
432 | spin_lock_irqsave(&d->lock, flags); | |
433 | d->flags |= DEVFL_UP; | |
434 | d->flags &= ~DEVFL_NEWSIZE; | |
435 | spin_unlock_irqrestore(&d->lock, flags); | |
436 | } | |
437 | } | |
438 | ||
1da177e4 LT |
439 | static void |
440 | ataid_complete(struct aoedev *d, unsigned char *id) | |
441 | { | |
442 | u64 ssize; | |
443 | u16 n; | |
444 | ||
445 | /* word 83: command set supported */ | |
475172fb | 446 | n = le16_to_cpu(get_unaligned((__le16 *) &id[83<<1])); |
1da177e4 LT |
447 | |
448 | /* word 86: command set/feature enabled */ | |
475172fb | 449 | n |= le16_to_cpu(get_unaligned((__le16 *) &id[86<<1])); |
1da177e4 LT |
450 | |
451 | if (n & (1<<10)) { /* bit 10: LBA 48 */ | |
452 | d->flags |= DEVFL_EXT; | |
453 | ||
454 | /* word 100: number lba48 sectors */ | |
475172fb | 455 | ssize = le64_to_cpu(get_unaligned((__le64 *) &id[100<<1])); |
1da177e4 LT |
456 | |
457 | /* set as in ide-disk.c:init_idedisk_capacity */ | |
458 | d->geo.cylinders = ssize; | |
459 | d->geo.cylinders /= (255 * 63); | |
460 | d->geo.heads = 255; | |
461 | d->geo.sectors = 63; | |
462 | } else { | |
463 | d->flags &= ~DEVFL_EXT; | |
464 | ||
465 | /* number lba28 sectors */ | |
475172fb | 466 | ssize = le32_to_cpu(get_unaligned((__le32 *) &id[60<<1])); |
1da177e4 LT |
467 | |
468 | /* NOTE: obsolete in ATA 6 */ | |
475172fb EC |
469 | d->geo.cylinders = le16_to_cpu(get_unaligned((__le16 *) &id[54<<1])); |
470 | d->geo.heads = le16_to_cpu(get_unaligned((__le16 *) &id[55<<1])); | |
471 | d->geo.sectors = le16_to_cpu(get_unaligned((__le16 *) &id[56<<1])); | |
1da177e4 | 472 | } |
3ae1c24e EC |
473 | |
474 | if (d->ssize != ssize) | |
a12c93f0 | 475 | printk(KERN_INFO "aoe: %012llx e%lu.%lu v%04x has %llu sectors\n", |
6bb6285f | 476 | (unsigned long long)mac_addr(d->addr), |
3ae1c24e EC |
477 | d->aoemajor, d->aoeminor, |
478 | d->fw_ver, (long long)ssize); | |
1da177e4 LT |
479 | d->ssize = ssize; |
480 | d->geo.start = 0; | |
481 | if (d->gd != NULL) { | |
482 | d->gd->capacity = ssize; | |
3ae1c24e EC |
483 | d->flags |= DEVFL_NEWSIZE; |
484 | } else { | |
485 | if (d->flags & DEVFL_GDALLOC) { | |
a12c93f0 | 486 | printk(KERN_ERR "aoe: can't schedule work for e%lu.%lu, %s\n", |
3ae1c24e | 487 | d->aoemajor, d->aoeminor, |
6bb6285f | 488 | "it's already on! This shouldn't happen.\n"); |
3ae1c24e EC |
489 | return; |
490 | } | |
491 | d->flags |= DEVFL_GDALLOC; | |
1da177e4 | 492 | } |
1da177e4 | 493 | schedule_work(&d->work); |
1da177e4 LT |
494 | } |
495 | ||
496 | static void | |
497 | calc_rttavg(struct aoedev *d, int rtt) | |
498 | { | |
499 | register long n; | |
500 | ||
501 | n = rtt; | |
dced3a05 EC |
502 | if (n < 0) { |
503 | n = -rtt; | |
504 | if (n < MINTIMER) | |
505 | n = MINTIMER; | |
506 | else if (n > MAXTIMER) | |
507 | n = MAXTIMER; | |
508 | d->mintimer += (n - d->mintimer) >> 1; | |
509 | } else if (n < d->mintimer) | |
510 | n = d->mintimer; | |
1da177e4 LT |
511 | else if (n > MAXTIMER) |
512 | n = MAXTIMER; | |
513 | ||
514 | /* g == .25; cf. Congestion Avoidance and Control, Jacobson & Karels; 1988 */ | |
515 | n -= d->rttavg; | |
516 | d->rttavg += n >> 2; | |
517 | } | |
518 | ||
519 | void | |
520 | aoecmd_ata_rsp(struct sk_buff *skb) | |
521 | { | |
522 | struct aoedev *d; | |
ddec63e8 | 523 | struct aoe_hdr *hin, *hout; |
1da177e4 LT |
524 | struct aoe_atahdr *ahin, *ahout; |
525 | struct frame *f; | |
526 | struct buf *buf; | |
527 | struct sk_buff *sl; | |
528 | register long n; | |
529 | ulong flags; | |
530 | char ebuf[128]; | |
32465c65 | 531 | u16 aoemajor; |
532 | ||
1da177e4 | 533 | hin = (struct aoe_hdr *) skb->mac.raw; |
63e9cc5d | 534 | aoemajor = be16_to_cpu(hin->major); |
32465c65 | 535 | d = aoedev_by_aoeaddr(aoemajor, hin->minor); |
1da177e4 LT |
536 | if (d == NULL) { |
537 | snprintf(ebuf, sizeof ebuf, "aoecmd_ata_rsp: ata response " | |
538 | "for unknown device %d.%d\n", | |
32465c65 | 539 | aoemajor, hin->minor); |
1da177e4 LT |
540 | aoechr_error(ebuf); |
541 | return; | |
542 | } | |
543 | ||
544 | spin_lock_irqsave(&d->lock, flags); | |
545 | ||
dced3a05 EC |
546 | n = be32_to_cpu(hin->tag); |
547 | f = getframe(d, n); | |
1da177e4 | 548 | if (f == NULL) { |
dced3a05 | 549 | calc_rttavg(d, -tsince(n)); |
1da177e4 LT |
550 | spin_unlock_irqrestore(&d->lock, flags); |
551 | snprintf(ebuf, sizeof ebuf, | |
552 | "%15s e%d.%d tag=%08x@%08lx\n", | |
553 | "unexpected rsp", | |
63e9cc5d | 554 | be16_to_cpu(hin->major), |
1da177e4 | 555 | hin->minor, |
63e9cc5d | 556 | be32_to_cpu(hin->tag), |
1da177e4 LT |
557 | jiffies); |
558 | aoechr_error(ebuf); | |
559 | return; | |
560 | } | |
561 | ||
562 | calc_rttavg(d, tsince(f->tag)); | |
563 | ||
564 | ahin = (struct aoe_atahdr *) (hin+1); | |
ddec63e8 EC |
565 | hout = (struct aoe_hdr *) f->skb->mac.raw; |
566 | ahout = (struct aoe_atahdr *) (hout+1); | |
1da177e4 LT |
567 | buf = f->buf; |
568 | ||
9d41965b EC |
569 | if (ahout->cmdstat == WIN_IDENTIFY) |
570 | d->flags &= ~DEVFL_PAUSE; | |
1da177e4 | 571 | if (ahin->cmdstat & 0xa9) { /* these bits cleared on success */ |
a12c93f0 EC |
572 | printk(KERN_ERR |
573 | "aoe: ata error cmd=%2.2Xh stat=%2.2Xh from e%ld.%ld\n", | |
1da177e4 LT |
574 | ahout->cmdstat, ahin->cmdstat, |
575 | d->aoemajor, d->aoeminor); | |
576 | if (buf) | |
577 | buf->flags |= BUFFL_FAIL; | |
578 | } else { | |
19bf2635 | 579 | n = ahout->scnt << 9; |
1da177e4 LT |
580 | switch (ahout->cmdstat) { |
581 | case WIN_READ: | |
582 | case WIN_READ_EXT: | |
1da177e4 | 583 | if (skb->len - sizeof *hin - sizeof *ahin < n) { |
a12c93f0 EC |
584 | printk(KERN_ERR |
585 | "aoe: runt data size in read. skb->len=%d\n", | |
1da177e4 LT |
586 | skb->len); |
587 | /* fail frame f? just returning will rexmit. */ | |
588 | spin_unlock_irqrestore(&d->lock, flags); | |
589 | return; | |
590 | } | |
591 | memcpy(f->bufaddr, ahin+1, n); | |
592 | case WIN_WRITE: | |
593 | case WIN_WRITE_EXT: | |
19bf2635 | 594 | if (f->bcnt -= n) { |
4f51dc5e | 595 | skb = f->skb; |
19bf2635 EC |
596 | f->bufaddr += n; |
597 | put_lba(ahout, f->lba += ahout->scnt); | |
6bb6285f EC |
598 | n = f->bcnt; |
599 | if (n > DEFAULTBCNT) | |
600 | n = DEFAULTBCNT; | |
19bf2635 | 601 | ahout->scnt = n >> 9; |
4f51dc5e EC |
602 | if (ahout->aflags & AOEAFL_WRITE) { |
603 | skb_fill_page_desc(skb, 0, | |
6bb6285f | 604 | virt_to_page(f->bufaddr), |
19bf2635 | 605 | offset_in_page(f->bufaddr), n); |
4f51dc5e EC |
606 | skb->len = sizeof *hout + sizeof *ahout + n; |
607 | skb->data_len = n; | |
608 | } | |
ddec63e8 EC |
609 | f->tag = newtag(d); |
610 | hout->tag = cpu_to_be32(f->tag); | |
611 | skb->dev = d->ifp; | |
4f51dc5e | 612 | skb = skb_clone(skb, GFP_ATOMIC); |
19bf2635 | 613 | spin_unlock_irqrestore(&d->lock, flags); |
4f51dc5e EC |
614 | if (skb) |
615 | aoenet_xmit(skb); | |
19bf2635 EC |
616 | return; |
617 | } | |
618 | if (n > DEFAULTBCNT) | |
619 | d->lostjumbo = 0; | |
1da177e4 LT |
620 | break; |
621 | case WIN_IDENTIFY: | |
622 | if (skb->len - sizeof *hin - sizeof *ahin < 512) { | |
a12c93f0 EC |
623 | printk(KERN_INFO |
624 | "aoe: runt data size in ataid. skb->len=%d\n", | |
6bb6285f | 625 | skb->len); |
1da177e4 LT |
626 | spin_unlock_irqrestore(&d->lock, flags); |
627 | return; | |
628 | } | |
629 | ataid_complete(d, (char *) (ahin+1)); | |
1da177e4 LT |
630 | break; |
631 | default: | |
a12c93f0 EC |
632 | printk(KERN_INFO |
633 | "aoe: unrecognized ata command %2.2Xh for %d.%d\n", | |
6bb6285f EC |
634 | ahout->cmdstat, |
635 | be16_to_cpu(hin->major), | |
636 | hin->minor); | |
1da177e4 LT |
637 | } |
638 | } | |
639 | ||
640 | if (buf) { | |
641 | buf->nframesout -= 1; | |
642 | if (buf->nframesout == 0 && buf->resid == 0) { | |
0c6f0e79 | 643 | unsigned long duration = jiffies - buf->start_time; |
644 | unsigned long n_sect = buf->bio->bi_size >> 9; | |
645 | struct gendisk *disk = d->gd; | |
496456c2 | 646 | const int rw = bio_data_dir(buf->bio); |
0c6f0e79 | 647 | |
496456c2 JA |
648 | disk_stat_inc(disk, ios[rw]); |
649 | disk_stat_add(disk, ticks[rw], duration); | |
650 | disk_stat_add(disk, sectors[rw], n_sect); | |
0c6f0e79 | 651 | disk_stat_add(disk, io_ticks, duration); |
1da177e4 LT |
652 | n = (buf->flags & BUFFL_FAIL) ? -EIO : 0; |
653 | bio_endio(buf->bio, buf->bio->bi_size, n); | |
654 | mempool_free(buf, d->bufpool); | |
655 | } | |
656 | } | |
657 | ||
658 | f->buf = NULL; | |
659 | f->tag = FREETAG; | |
660 | ||
661 | aoecmd_work(d); | |
a4b38364 | 662 | sl = d->sendq_hd; |
663 | d->sendq_hd = d->sendq_tl = NULL; | |
1da177e4 LT |
664 | |
665 | spin_unlock_irqrestore(&d->lock, flags); | |
1da177e4 LT |
666 | aoenet_xmit(sl); |
667 | } | |
668 | ||
669 | void | |
670 | aoecmd_cfg(ushort aoemajor, unsigned char aoeminor) | |
671 | { | |
3ae1c24e | 672 | struct sk_buff *sl; |
1da177e4 | 673 | |
3ae1c24e | 674 | sl = aoecmd_cfg_pkts(aoemajor, aoeminor, NULL); |
1da177e4 LT |
675 | |
676 | aoenet_xmit(sl); | |
677 | } | |
678 | ||
679 | /* | |
680 | * Since we only call this in one place (and it only prepares one frame) | |
a4b38364 | 681 | * we just return the skb. Usually we'd chain it up to the aoedev sendq. |
1da177e4 LT |
682 | */ |
683 | static struct sk_buff * | |
684 | aoecmd_ata_id(struct aoedev *d) | |
685 | { | |
686 | struct aoe_hdr *h; | |
687 | struct aoe_atahdr *ah; | |
688 | struct frame *f; | |
689 | struct sk_buff *skb; | |
690 | ||
4f51dc5e | 691 | f = freeframe(d); |
1da177e4 | 692 | if (f == NULL) { |
a12c93f0 | 693 | printk(KERN_ERR "aoe: can't get a frame. This shouldn't happen.\n"); |
1da177e4 LT |
694 | return NULL; |
695 | } | |
696 | ||
697 | /* initialize the headers & frame */ | |
e407a7f6 EC |
698 | skb = f->skb; |
699 | h = (struct aoe_hdr *) skb->mac.raw; | |
1da177e4 | 700 | ah = (struct aoe_atahdr *) (h+1); |
4f51dc5e EC |
701 | skb->len = ETH_ZLEN; |
702 | memset(h, 0, ETH_ZLEN); | |
1da177e4 LT |
703 | f->tag = aoehdr_atainit(d, h); |
704 | f->waited = 0; | |
1da177e4 | 705 | |
1da177e4 LT |
706 | /* set up ata header */ |
707 | ah->scnt = 1; | |
708 | ah->cmdstat = WIN_IDENTIFY; | |
709 | ah->lba3 = 0xa0; | |
710 | ||
e407a7f6 | 711 | skb->dev = d->ifp; |
1da177e4 | 712 | |
3ae1c24e | 713 | d->rttavg = MAXTIMER; |
1da177e4 | 714 | d->timer.function = rexmit_timer; |
1da177e4 | 715 | |
4f51dc5e | 716 | return skb_clone(skb, GFP_ATOMIC); |
1da177e4 LT |
717 | } |
718 | ||
719 | void | |
720 | aoecmd_cfg_rsp(struct sk_buff *skb) | |
721 | { | |
722 | struct aoedev *d; | |
723 | struct aoe_hdr *h; | |
724 | struct aoe_cfghdr *ch; | |
63e9cc5d | 725 | ulong flags, sysminor, aoemajor; |
1da177e4 | 726 | struct sk_buff *sl; |
eaf0a3cb | 727 | enum { MAXFRAMES = 16 }; |
19bf2635 | 728 | u16 n; |
1da177e4 LT |
729 | |
730 | h = (struct aoe_hdr *) skb->mac.raw; | |
731 | ch = (struct aoe_cfghdr *) (h+1); | |
732 | ||
733 | /* | |
734 | * Enough people have their dip switches set backwards to | |
735 | * warrant a loud message for this special case. | |
736 | */ | |
63e9cc5d | 737 | aoemajor = be16_to_cpu(h->major); |
1da177e4 | 738 | if (aoemajor == 0xfff) { |
a12c93f0 | 739 | printk(KERN_ERR "aoe: Warning: shelf address is all ones. " |
6bb6285f | 740 | "Check shelf dip switches.\n"); |
1da177e4 LT |
741 | return; |
742 | } | |
743 | ||
744 | sysminor = SYSMINOR(aoemajor, h->minor); | |
fc458dcd | 745 | if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) { |
a12c93f0 | 746 | printk(KERN_INFO "aoe: e%ld.%d: minor number too large\n", |
fc458dcd | 747 | aoemajor, (int) h->minor); |
1da177e4 LT |
748 | return; |
749 | } | |
750 | ||
19bf2635 EC |
751 | n = be16_to_cpu(ch->bufcnt); |
752 | if (n > MAXFRAMES) /* keep it reasonable */ | |
753 | n = MAXFRAMES; | |
1da177e4 | 754 | |
19bf2635 | 755 | d = aoedev_by_sysminor_m(sysminor, n); |
1da177e4 | 756 | if (d == NULL) { |
a12c93f0 | 757 | printk(KERN_INFO "aoe: device sysminor_m failure\n"); |
1da177e4 LT |
758 | return; |
759 | } | |
760 | ||
761 | spin_lock_irqsave(&d->lock, flags); | |
762 | ||
3ae1c24e EC |
763 | /* permit device to migrate mac and network interface */ |
764 | d->ifp = skb->dev; | |
765 | memcpy(d->addr, h->src, sizeof d->addr); | |
19bf2635 EC |
766 | if (!(d->flags & DEVFL_MAXBCNT)) { |
767 | n = d->ifp->mtu; | |
768 | n -= sizeof (struct aoe_hdr) + sizeof (struct aoe_atahdr); | |
769 | n /= 512; | |
770 | if (n > ch->scnt) | |
771 | n = ch->scnt; | |
4f51dc5e EC |
772 | n = n ? n * 512 : DEFAULTBCNT; |
773 | if (n != d->maxbcnt) { | |
a12c93f0 EC |
774 | printk(KERN_INFO |
775 | "aoe: e%ld.%ld: setting %d byte data frames on %s\n", | |
4f51dc5e EC |
776 | d->aoemajor, d->aoeminor, n, d->ifp->name); |
777 | d->maxbcnt = n; | |
778 | } | |
19bf2635 | 779 | } |
3ae1c24e EC |
780 | |
781 | /* don't change users' perspective */ | |
782 | if (d->nopen && !(d->flags & DEVFL_PAUSE)) { | |
1da177e4 LT |
783 | spin_unlock_irqrestore(&d->lock, flags); |
784 | return; | |
785 | } | |
3ae1c24e | 786 | d->flags |= DEVFL_PAUSE; /* force pause */ |
dced3a05 | 787 | d->mintimer = MINTIMER; |
63e9cc5d | 788 | d->fw_ver = be16_to_cpu(ch->fwver); |
1da177e4 | 789 | |
3ae1c24e EC |
790 | /* check for already outstanding ataid */ |
791 | sl = aoedev_isbusy(d) == 0 ? aoecmd_ata_id(d) : NULL; | |
1da177e4 LT |
792 | |
793 | spin_unlock_irqrestore(&d->lock, flags); | |
794 | ||
795 | aoenet_xmit(sl); | |
796 | } | |
797 |