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; | |
1da177e4 LT |
33 | skb->next = skb->prev = NULL; |
34 | ||
35 | /* tell the network layer not to perform IP checksums | |
36 | * or to get the NIC to do it | |
37 | */ | |
38 | skb->ip_summed = CHECKSUM_NONE; | |
39 | } | |
40 | return skb; | |
41 | } | |
42 | ||
1da177e4 LT |
43 | static struct frame * |
44 | getframe(struct aoedev *d, int tag) | |
45 | { | |
46 | struct frame *f, *e; | |
47 | ||
48 | f = d->frames; | |
49 | e = f + d->nframes; | |
50 | for (; f<e; f++) | |
51 | if (f->tag == tag) | |
52 | return f; | |
53 | return NULL; | |
54 | } | |
55 | ||
56 | /* | |
57 | * Leave the top bit clear so we have tagspace for userland. | |
58 | * The bottom 16 bits are the xmit tick for rexmit/rttavg processing. | |
59 | * This driver reserves tag -1 to mean "unused frame." | |
60 | */ | |
61 | static int | |
62 | newtag(struct aoedev *d) | |
63 | { | |
64 | register ulong n; | |
65 | ||
66 | n = jiffies & 0xffff; | |
67 | return n |= (++d->lasttag & 0x7fff) << 16; | |
68 | } | |
69 | ||
70 | static int | |
71 | aoehdr_atainit(struct aoedev *d, struct aoe_hdr *h) | |
72 | { | |
1da177e4 | 73 | u32 host_tag = newtag(d); |
1da177e4 LT |
74 | |
75 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); | |
76 | memcpy(h->dst, d->addr, sizeof h->dst); | |
63e9cc5d | 77 | h->type = __constant_cpu_to_be16(ETH_P_AOE); |
1da177e4 | 78 | h->verfl = AOE_HVER; |
63e9cc5d | 79 | h->major = cpu_to_be16(d->aoemajor); |
1da177e4 LT |
80 | h->minor = d->aoeminor; |
81 | h->cmd = AOECMD_ATA; | |
63e9cc5d | 82 | h->tag = cpu_to_be32(host_tag); |
1da177e4 LT |
83 | |
84 | return host_tag; | |
85 | } | |
86 | ||
19bf2635 EC |
87 | static inline void |
88 | put_lba(struct aoe_atahdr *ah, sector_t lba) | |
89 | { | |
90 | ah->lba0 = lba; | |
91 | ah->lba1 = lba >>= 8; | |
92 | ah->lba2 = lba >>= 8; | |
93 | ah->lba3 = lba >>= 8; | |
94 | ah->lba4 = lba >>= 8; | |
95 | ah->lba5 = lba >>= 8; | |
96 | } | |
97 | ||
1da177e4 LT |
98 | static void |
99 | aoecmd_ata_rw(struct aoedev *d, struct frame *f) | |
100 | { | |
101 | struct aoe_hdr *h; | |
102 | struct aoe_atahdr *ah; | |
103 | struct buf *buf; | |
104 | struct sk_buff *skb; | |
105 | ulong bcnt; | |
106 | register sector_t sector; | |
107 | char writebit, extbit; | |
108 | ||
109 | writebit = 0x10; | |
110 | extbit = 0x4; | |
111 | ||
112 | buf = d->inprocess; | |
113 | ||
114 | sector = buf->sector; | |
115 | bcnt = buf->bv_resid; | |
19bf2635 EC |
116 | if (bcnt > d->maxbcnt) |
117 | bcnt = d->maxbcnt; | |
1da177e4 LT |
118 | |
119 | /* initialize the headers & frame */ | |
e407a7f6 | 120 | skb = f->skb; |
029720f1 | 121 | h = aoe_hdr(skb); |
1da177e4 | 122 | ah = (struct aoe_atahdr *) (h+1); |
19900cde EC |
123 | skb_put(skb, sizeof *h + sizeof *ah); |
124 | memset(h, 0, skb->len); | |
1da177e4 LT |
125 | f->tag = aoehdr_atainit(d, h); |
126 | f->waited = 0; | |
127 | f->buf = buf; | |
128 | f->bufaddr = buf->bufaddr; | |
19bf2635 EC |
129 | f->bcnt = bcnt; |
130 | f->lba = sector; | |
1da177e4 LT |
131 | |
132 | /* set up ata header */ | |
133 | ah->scnt = bcnt >> 9; | |
19bf2635 | 134 | put_lba(ah, sector); |
1da177e4 LT |
135 | if (d->flags & DEVFL_EXT) { |
136 | ah->aflags |= AOEAFL_EXT; | |
1da177e4 LT |
137 | } else { |
138 | extbit = 0; | |
139 | ah->lba3 &= 0x0f; | |
140 | ah->lba3 |= 0xe0; /* LBA bit + obsolete 0xa0 */ | |
141 | } | |
142 | ||
143 | if (bio_data_dir(buf->bio) == WRITE) { | |
e407a7f6 EC |
144 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), |
145 | offset_in_page(f->bufaddr), bcnt); | |
1da177e4 | 146 | ah->aflags |= AOEAFL_WRITE; |
4f51dc5e EC |
147 | skb->len += bcnt; |
148 | skb->data_len = bcnt; | |
1da177e4 LT |
149 | } else { |
150 | writebit = 0; | |
1da177e4 LT |
151 | } |
152 | ||
153 | ah->cmdstat = WIN_READ | writebit | extbit; | |
154 | ||
155 | /* mark all tracking fields and load out */ | |
156 | buf->nframesout += 1; | |
157 | buf->bufaddr += bcnt; | |
158 | buf->bv_resid -= bcnt; | |
a12c93f0 | 159 | /* printk(KERN_DEBUG "aoe: bv_resid=%ld\n", buf->bv_resid); */ |
1da177e4 LT |
160 | buf->resid -= bcnt; |
161 | buf->sector += bcnt >> 9; | |
162 | if (buf->resid == 0) { | |
163 | d->inprocess = NULL; | |
164 | } else if (buf->bv_resid == 0) { | |
165 | buf->bv++; | |
392e4845 | 166 | WARN_ON(buf->bv->bv_len == 0); |
1da177e4 LT |
167 | buf->bv_resid = buf->bv->bv_len; |
168 | buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset; | |
169 | } | |
170 | ||
e407a7f6 | 171 | skb->dev = d->ifp; |
4f51dc5e EC |
172 | skb = skb_clone(skb, GFP_ATOMIC); |
173 | if (skb == NULL) | |
174 | return; | |
e407a7f6 EC |
175 | if (d->sendq_hd) |
176 | d->sendq_tl->next = skb; | |
177 | else | |
178 | d->sendq_hd = skb; | |
179 | d->sendq_tl = skb; | |
1da177e4 LT |
180 | } |
181 | ||
3ae1c24e EC |
182 | /* some callers cannot sleep, and they can call this function, |
183 | * transmitting the packets later, when interrupts are on | |
184 | */ | |
185 | static struct sk_buff * | |
186 | aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail) | |
187 | { | |
188 | struct aoe_hdr *h; | |
189 | struct aoe_cfghdr *ch; | |
190 | struct sk_buff *skb, *sl, *sl_tail; | |
191 | struct net_device *ifp; | |
192 | ||
193 | sl = sl_tail = NULL; | |
194 | ||
195 | read_lock(&dev_base_lock); | |
196 | for (ifp = dev_base; ifp; dev_put(ifp), ifp = ifp->next) { | |
197 | dev_hold(ifp); | |
198 | if (!is_aoe_netif(ifp)) | |
199 | continue; | |
200 | ||
e407a7f6 | 201 | skb = new_skb(sizeof *h + sizeof *ch); |
3ae1c24e | 202 | if (skb == NULL) { |
a12c93f0 | 203 | printk(KERN_INFO "aoe: skb alloc failure\n"); |
3ae1c24e EC |
204 | continue; |
205 | } | |
19900cde | 206 | skb_put(skb, sizeof *h + sizeof *ch); |
e407a7f6 | 207 | skb->dev = ifp; |
3ae1c24e EC |
208 | if (sl_tail == NULL) |
209 | sl_tail = skb; | |
029720f1 | 210 | h = aoe_hdr(skb); |
3ae1c24e EC |
211 | memset(h, 0, sizeof *h + sizeof *ch); |
212 | ||
213 | memset(h->dst, 0xff, sizeof h->dst); | |
214 | memcpy(h->src, ifp->dev_addr, sizeof h->src); | |
215 | h->type = __constant_cpu_to_be16(ETH_P_AOE); | |
216 | h->verfl = AOE_HVER; | |
217 | h->major = cpu_to_be16(aoemajor); | |
218 | h->minor = aoeminor; | |
219 | h->cmd = AOECMD_CFG; | |
220 | ||
221 | skb->next = sl; | |
222 | sl = skb; | |
223 | } | |
224 | read_unlock(&dev_base_lock); | |
225 | ||
226 | if (tail != NULL) | |
227 | *tail = sl_tail; | |
228 | return sl; | |
229 | } | |
230 | ||
4f51dc5e EC |
231 | static struct frame * |
232 | freeframe(struct aoedev *d) | |
233 | { | |
234 | struct frame *f, *e; | |
235 | int n = 0; | |
236 | ||
237 | f = d->frames; | |
238 | e = f + d->nframes; | |
239 | for (; f<e; f++) { | |
240 | if (f->tag != FREETAG) | |
241 | continue; | |
242 | if (atomic_read(&skb_shinfo(f->skb)->dataref) == 1) { | |
243 | skb_shinfo(f->skb)->nr_frags = f->skb->data_len = 0; | |
19900cde | 244 | skb_trim(f->skb, 0); |
4f51dc5e EC |
245 | return f; |
246 | } | |
247 | n++; | |
248 | } | |
249 | if (n == d->nframes) /* wait for network layer */ | |
250 | d->flags |= DEVFL_KICKME; | |
251 | ||
252 | return NULL; | |
253 | } | |
254 | ||
1da177e4 LT |
255 | /* enters with d->lock held */ |
256 | void | |
257 | aoecmd_work(struct aoedev *d) | |
258 | { | |
259 | struct frame *f; | |
260 | struct buf *buf; | |
3ae1c24e EC |
261 | |
262 | if (d->flags & DEVFL_PAUSE) { | |
263 | if (!aoedev_isbusy(d)) | |
264 | d->sendq_hd = aoecmd_cfg_pkts(d->aoemajor, | |
265 | d->aoeminor, &d->sendq_tl); | |
266 | return; | |
267 | } | |
268 | ||
1da177e4 | 269 | loop: |
4f51dc5e | 270 | f = freeframe(d); |
1da177e4 LT |
271 | if (f == NULL) |
272 | return; | |
273 | if (d->inprocess == NULL) { | |
274 | if (list_empty(&d->bufq)) | |
275 | return; | |
276 | buf = container_of(d->bufq.next, struct buf, bufs); | |
277 | list_del(d->bufq.next); | |
a12c93f0 | 278 | /*printk(KERN_DEBUG "aoe: bi_size=%ld\n", buf->bio->bi_size); */ |
1da177e4 LT |
279 | d->inprocess = buf; |
280 | } | |
281 | aoecmd_ata_rw(d, f); | |
282 | goto loop; | |
283 | } | |
284 | ||
285 | static void | |
286 | rexmit(struct aoedev *d, struct frame *f) | |
287 | { | |
288 | struct sk_buff *skb; | |
289 | struct aoe_hdr *h; | |
19bf2635 | 290 | struct aoe_atahdr *ah; |
1da177e4 LT |
291 | char buf[128]; |
292 | u32 n; | |
1da177e4 LT |
293 | |
294 | n = newtag(d); | |
295 | ||
296 | snprintf(buf, sizeof buf, | |
297 | "%15s e%ld.%ld oldtag=%08x@%08lx newtag=%08x\n", | |
298 | "retransmit", | |
299 | d->aoemajor, d->aoeminor, f->tag, jiffies, n); | |
300 | aoechr_error(buf); | |
301 | ||
e407a7f6 | 302 | skb = f->skb; |
029720f1 | 303 | h = aoe_hdr(skb); |
19bf2635 | 304 | ah = (struct aoe_atahdr *) (h+1); |
1da177e4 | 305 | f->tag = n; |
63e9cc5d | 306 | h->tag = cpu_to_be32(n); |
2dd5e422 EC |
307 | memcpy(h->dst, d->addr, sizeof h->dst); |
308 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); | |
1da177e4 | 309 | |
19bf2635 EC |
310 | n = DEFAULTBCNT / 512; |
311 | if (ah->scnt > n) { | |
312 | ah->scnt = n; | |
4f51dc5e | 313 | if (ah->aflags & AOEAFL_WRITE) { |
19bf2635 EC |
314 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), |
315 | offset_in_page(f->bufaddr), DEFAULTBCNT); | |
4f51dc5e EC |
316 | skb->len = sizeof *h + sizeof *ah + DEFAULTBCNT; |
317 | skb->data_len = DEFAULTBCNT; | |
318 | } | |
19bf2635 EC |
319 | if (++d->lostjumbo > (d->nframes << 1)) |
320 | if (d->maxbcnt != DEFAULTBCNT) { | |
a12c93f0 | 321 | printk(KERN_INFO "aoe: e%ld.%ld: too many lost jumbo on %s - using 1KB frames.\n", |
4f51dc5e | 322 | d->aoemajor, d->aoeminor, d->ifp->name); |
19bf2635 EC |
323 | d->maxbcnt = DEFAULTBCNT; |
324 | d->flags |= DEVFL_MAXBCNT; | |
325 | } | |
326 | } | |
327 | ||
e407a7f6 | 328 | skb->dev = d->ifp; |
4f51dc5e EC |
329 | skb = skb_clone(skb, GFP_ATOMIC); |
330 | if (skb == NULL) | |
331 | return; | |
e407a7f6 EC |
332 | if (d->sendq_hd) |
333 | d->sendq_tl->next = skb; | |
334 | else | |
335 | d->sendq_hd = skb; | |
336 | d->sendq_tl = skb; | |
1da177e4 LT |
337 | } |
338 | ||
339 | static int | |
340 | tsince(int tag) | |
341 | { | |
342 | int n; | |
343 | ||
344 | n = jiffies & 0xffff; | |
345 | n -= tag & 0xffff; | |
346 | if (n < 0) | |
347 | n += 1<<16; | |
348 | return n; | |
349 | } | |
350 | ||
351 | static void | |
352 | rexmit_timer(ulong vp) | |
353 | { | |
354 | struct aoedev *d; | |
355 | struct frame *f, *e; | |
356 | struct sk_buff *sl; | |
357 | register long timeout; | |
358 | ulong flags, n; | |
359 | ||
360 | d = (struct aoedev *) vp; | |
361 | sl = NULL; | |
362 | ||
363 | /* timeout is always ~150% of the moving average */ | |
364 | timeout = d->rttavg; | |
365 | timeout += timeout >> 1; | |
366 | ||
367 | spin_lock_irqsave(&d->lock, flags); | |
368 | ||
369 | if (d->flags & DEVFL_TKILL) { | |
1c6f3fca | 370 | spin_unlock_irqrestore(&d->lock, flags); |
1da177e4 LT |
371 | return; |
372 | } | |
373 | f = d->frames; | |
374 | e = f + d->nframes; | |
375 | for (; f<e; f++) { | |
376 | if (f->tag != FREETAG && tsince(f->tag) >= timeout) { | |
377 | n = f->waited += timeout; | |
378 | n /= HZ; | |
b751e8b6 | 379 | if (n > aoe_deadsecs) { /* waited too long for response */ |
1da177e4 | 380 | aoedev_downdev(d); |
1c6f3fca | 381 | break; |
1da177e4 LT |
382 | } |
383 | rexmit(d, f); | |
384 | } | |
385 | } | |
4f51dc5e EC |
386 | if (d->flags & DEVFL_KICKME) { |
387 | d->flags &= ~DEVFL_KICKME; | |
388 | aoecmd_work(d); | |
389 | } | |
1da177e4 | 390 | |
a4b38364 | 391 | sl = d->sendq_hd; |
392 | d->sendq_hd = d->sendq_tl = NULL; | |
1da177e4 LT |
393 | if (sl) { |
394 | n = d->rttavg <<= 1; | |
395 | if (n > MAXTIMER) | |
396 | d->rttavg = MAXTIMER; | |
397 | } | |
398 | ||
399 | d->timer.expires = jiffies + TIMERTICK; | |
400 | add_timer(&d->timer); | |
401 | ||
402 | spin_unlock_irqrestore(&d->lock, flags); | |
403 | ||
404 | aoenet_xmit(sl); | |
405 | } | |
406 | ||
3ae1c24e EC |
407 | /* this function performs work that has been deferred until sleeping is OK |
408 | */ | |
409 | void | |
c4028958 | 410 | aoecmd_sleepwork(struct work_struct *work) |
3ae1c24e | 411 | { |
c4028958 | 412 | struct aoedev *d = container_of(work, struct aoedev, work); |
3ae1c24e EC |
413 | |
414 | if (d->flags & DEVFL_GDALLOC) | |
415 | aoeblk_gdalloc(d); | |
416 | ||
417 | if (d->flags & DEVFL_NEWSIZE) { | |
418 | struct block_device *bd; | |
419 | unsigned long flags; | |
420 | u64 ssize; | |
421 | ||
422 | ssize = d->gd->capacity; | |
423 | bd = bdget_disk(d->gd, 0); | |
424 | ||
425 | if (bd) { | |
426 | mutex_lock(&bd->bd_inode->i_mutex); | |
427 | i_size_write(bd->bd_inode, (loff_t)ssize<<9); | |
428 | mutex_unlock(&bd->bd_inode->i_mutex); | |
429 | bdput(bd); | |
430 | } | |
431 | spin_lock_irqsave(&d->lock, flags); | |
432 | d->flags |= DEVFL_UP; | |
433 | d->flags &= ~DEVFL_NEWSIZE; | |
434 | spin_unlock_irqrestore(&d->lock, flags); | |
435 | } | |
436 | } | |
437 | ||
1da177e4 LT |
438 | static void |
439 | ataid_complete(struct aoedev *d, unsigned char *id) | |
440 | { | |
441 | u64 ssize; | |
442 | u16 n; | |
443 | ||
444 | /* word 83: command set supported */ | |
475172fb | 445 | n = le16_to_cpu(get_unaligned((__le16 *) &id[83<<1])); |
1da177e4 LT |
446 | |
447 | /* word 86: command set/feature enabled */ | |
475172fb | 448 | n |= le16_to_cpu(get_unaligned((__le16 *) &id[86<<1])); |
1da177e4 LT |
449 | |
450 | if (n & (1<<10)) { /* bit 10: LBA 48 */ | |
451 | d->flags |= DEVFL_EXT; | |
452 | ||
453 | /* word 100: number lba48 sectors */ | |
475172fb | 454 | ssize = le64_to_cpu(get_unaligned((__le64 *) &id[100<<1])); |
1da177e4 LT |
455 | |
456 | /* set as in ide-disk.c:init_idedisk_capacity */ | |
457 | d->geo.cylinders = ssize; | |
458 | d->geo.cylinders /= (255 * 63); | |
459 | d->geo.heads = 255; | |
460 | d->geo.sectors = 63; | |
461 | } else { | |
462 | d->flags &= ~DEVFL_EXT; | |
463 | ||
464 | /* number lba28 sectors */ | |
475172fb | 465 | ssize = le32_to_cpu(get_unaligned((__le32 *) &id[60<<1])); |
1da177e4 LT |
466 | |
467 | /* NOTE: obsolete in ATA 6 */ | |
475172fb EC |
468 | d->geo.cylinders = le16_to_cpu(get_unaligned((__le16 *) &id[54<<1])); |
469 | d->geo.heads = le16_to_cpu(get_unaligned((__le16 *) &id[55<<1])); | |
470 | d->geo.sectors = le16_to_cpu(get_unaligned((__le16 *) &id[56<<1])); | |
1da177e4 | 471 | } |
3ae1c24e EC |
472 | |
473 | if (d->ssize != ssize) | |
a12c93f0 | 474 | printk(KERN_INFO "aoe: %012llx e%lu.%lu v%04x has %llu sectors\n", |
6bb6285f | 475 | (unsigned long long)mac_addr(d->addr), |
3ae1c24e EC |
476 | d->aoemajor, d->aoeminor, |
477 | d->fw_ver, (long long)ssize); | |
1da177e4 LT |
478 | d->ssize = ssize; |
479 | d->geo.start = 0; | |
480 | if (d->gd != NULL) { | |
481 | d->gd->capacity = ssize; | |
3ae1c24e EC |
482 | d->flags |= DEVFL_NEWSIZE; |
483 | } else { | |
484 | if (d->flags & DEVFL_GDALLOC) { | |
a12c93f0 | 485 | printk(KERN_ERR "aoe: can't schedule work for e%lu.%lu, %s\n", |
3ae1c24e | 486 | d->aoemajor, d->aoeminor, |
6bb6285f | 487 | "it's already on! This shouldn't happen.\n"); |
3ae1c24e EC |
488 | return; |
489 | } | |
490 | d->flags |= DEVFL_GDALLOC; | |
1da177e4 | 491 | } |
1da177e4 | 492 | schedule_work(&d->work); |
1da177e4 LT |
493 | } |
494 | ||
495 | static void | |
496 | calc_rttavg(struct aoedev *d, int rtt) | |
497 | { | |
498 | register long n; | |
499 | ||
500 | n = rtt; | |
dced3a05 EC |
501 | if (n < 0) { |
502 | n = -rtt; | |
503 | if (n < MINTIMER) | |
504 | n = MINTIMER; | |
505 | else if (n > MAXTIMER) | |
506 | n = MAXTIMER; | |
507 | d->mintimer += (n - d->mintimer) >> 1; | |
508 | } else if (n < d->mintimer) | |
509 | n = d->mintimer; | |
1da177e4 LT |
510 | else if (n > MAXTIMER) |
511 | n = MAXTIMER; | |
512 | ||
513 | /* g == .25; cf. Congestion Avoidance and Control, Jacobson & Karels; 1988 */ | |
514 | n -= d->rttavg; | |
515 | d->rttavg += n >> 2; | |
516 | } | |
517 | ||
518 | void | |
519 | aoecmd_ata_rsp(struct sk_buff *skb) | |
520 | { | |
521 | struct aoedev *d; | |
ddec63e8 | 522 | struct aoe_hdr *hin, *hout; |
1da177e4 LT |
523 | struct aoe_atahdr *ahin, *ahout; |
524 | struct frame *f; | |
525 | struct buf *buf; | |
526 | struct sk_buff *sl; | |
527 | register long n; | |
528 | ulong flags; | |
529 | char ebuf[128]; | |
32465c65 | 530 | u16 aoemajor; |
531 | ||
029720f1 | 532 | hin = aoe_hdr(skb); |
43ecf529 | 533 | aoemajor = be16_to_cpu(get_unaligned(&hin->major)); |
32465c65 | 534 | d = aoedev_by_aoeaddr(aoemajor, hin->minor); |
1da177e4 LT |
535 | if (d == NULL) { |
536 | snprintf(ebuf, sizeof ebuf, "aoecmd_ata_rsp: ata response " | |
537 | "for unknown device %d.%d\n", | |
32465c65 | 538 | aoemajor, hin->minor); |
1da177e4 LT |
539 | aoechr_error(ebuf); |
540 | return; | |
541 | } | |
542 | ||
543 | spin_lock_irqsave(&d->lock, flags); | |
544 | ||
43ecf529 | 545 | n = be32_to_cpu(get_unaligned(&hin->tag)); |
dced3a05 | 546 | f = getframe(d, n); |
1da177e4 | 547 | if (f == NULL) { |
dced3a05 | 548 | calc_rttavg(d, -tsince(n)); |
1da177e4 LT |
549 | spin_unlock_irqrestore(&d->lock, flags); |
550 | snprintf(ebuf, sizeof ebuf, | |
551 | "%15s e%d.%d tag=%08x@%08lx\n", | |
552 | "unexpected rsp", | |
43ecf529 | 553 | be16_to_cpu(get_unaligned(&hin->major)), |
1da177e4 | 554 | hin->minor, |
43ecf529 | 555 | be32_to_cpu(get_unaligned(&hin->tag)), |
1da177e4 LT |
556 | jiffies); |
557 | aoechr_error(ebuf); | |
558 | return; | |
559 | } | |
560 | ||
561 | calc_rttavg(d, tsince(f->tag)); | |
562 | ||
563 | ahin = (struct aoe_atahdr *) (hin+1); | |
029720f1 | 564 | hout = aoe_hdr(f->skb); |
ddec63e8 | 565 | ahout = (struct aoe_atahdr *) (hout+1); |
1da177e4 LT |
566 | buf = f->buf; |
567 | ||
9d41965b EC |
568 | if (ahout->cmdstat == WIN_IDENTIFY) |
569 | d->flags &= ~DEVFL_PAUSE; | |
1da177e4 | 570 | if (ahin->cmdstat & 0xa9) { /* these bits cleared on success */ |
a12c93f0 EC |
571 | printk(KERN_ERR |
572 | "aoe: ata error cmd=%2.2Xh stat=%2.2Xh from e%ld.%ld\n", | |
1da177e4 LT |
573 | ahout->cmdstat, ahin->cmdstat, |
574 | d->aoemajor, d->aoeminor); | |
575 | if (buf) | |
576 | buf->flags |= BUFFL_FAIL; | |
577 | } else { | |
19bf2635 | 578 | n = ahout->scnt << 9; |
1da177e4 LT |
579 | switch (ahout->cmdstat) { |
580 | case WIN_READ: | |
581 | case WIN_READ_EXT: | |
1da177e4 | 582 | if (skb->len - sizeof *hin - sizeof *ahin < n) { |
a12c93f0 EC |
583 | printk(KERN_ERR |
584 | "aoe: runt data size in read. skb->len=%d\n", | |
1da177e4 LT |
585 | skb->len); |
586 | /* fail frame f? just returning will rexmit. */ | |
587 | spin_unlock_irqrestore(&d->lock, flags); | |
588 | return; | |
589 | } | |
590 | memcpy(f->bufaddr, ahin+1, n); | |
591 | case WIN_WRITE: | |
592 | case WIN_WRITE_EXT: | |
19bf2635 | 593 | if (f->bcnt -= n) { |
4f51dc5e | 594 | skb = f->skb; |
19bf2635 EC |
595 | f->bufaddr += n; |
596 | put_lba(ahout, f->lba += ahout->scnt); | |
6bb6285f EC |
597 | n = f->bcnt; |
598 | if (n > DEFAULTBCNT) | |
599 | n = DEFAULTBCNT; | |
19bf2635 | 600 | ahout->scnt = n >> 9; |
4f51dc5e EC |
601 | if (ahout->aflags & AOEAFL_WRITE) { |
602 | skb_fill_page_desc(skb, 0, | |
6bb6285f | 603 | virt_to_page(f->bufaddr), |
19bf2635 | 604 | offset_in_page(f->bufaddr), n); |
4f51dc5e EC |
605 | skb->len = sizeof *hout + sizeof *ahout + n; |
606 | skb->data_len = n; | |
607 | } | |
ddec63e8 EC |
608 | f->tag = newtag(d); |
609 | hout->tag = cpu_to_be32(f->tag); | |
610 | skb->dev = d->ifp; | |
4f51dc5e | 611 | skb = skb_clone(skb, GFP_ATOMIC); |
19bf2635 | 612 | spin_unlock_irqrestore(&d->lock, flags); |
4f51dc5e EC |
613 | if (skb) |
614 | aoenet_xmit(skb); | |
19bf2635 EC |
615 | return; |
616 | } | |
617 | if (n > DEFAULTBCNT) | |
618 | d->lostjumbo = 0; | |
1da177e4 LT |
619 | break; |
620 | case WIN_IDENTIFY: | |
621 | if (skb->len - sizeof *hin - sizeof *ahin < 512) { | |
a12c93f0 EC |
622 | printk(KERN_INFO |
623 | "aoe: runt data size in ataid. skb->len=%d\n", | |
6bb6285f | 624 | skb->len); |
1da177e4 LT |
625 | spin_unlock_irqrestore(&d->lock, flags); |
626 | return; | |
627 | } | |
628 | ataid_complete(d, (char *) (ahin+1)); | |
1da177e4 LT |
629 | break; |
630 | default: | |
a12c93f0 EC |
631 | printk(KERN_INFO |
632 | "aoe: unrecognized ata command %2.2Xh for %d.%d\n", | |
6bb6285f | 633 | ahout->cmdstat, |
43ecf529 | 634 | be16_to_cpu(get_unaligned(&hin->major)), |
6bb6285f | 635 | hin->minor); |
1da177e4 LT |
636 | } |
637 | } | |
638 | ||
639 | if (buf) { | |
640 | buf->nframesout -= 1; | |
641 | if (buf->nframesout == 0 && buf->resid == 0) { | |
0c6f0e79 | 642 | unsigned long duration = jiffies - buf->start_time; |
643 | unsigned long n_sect = buf->bio->bi_size >> 9; | |
644 | struct gendisk *disk = d->gd; | |
496456c2 | 645 | const int rw = bio_data_dir(buf->bio); |
0c6f0e79 | 646 | |
496456c2 JA |
647 | disk_stat_inc(disk, ios[rw]); |
648 | disk_stat_add(disk, ticks[rw], duration); | |
649 | disk_stat_add(disk, sectors[rw], n_sect); | |
0c6f0e79 | 650 | disk_stat_add(disk, io_ticks, duration); |
1da177e4 LT |
651 | n = (buf->flags & BUFFL_FAIL) ? -EIO : 0; |
652 | bio_endio(buf->bio, buf->bio->bi_size, n); | |
653 | mempool_free(buf, d->bufpool); | |
654 | } | |
655 | } | |
656 | ||
657 | f->buf = NULL; | |
658 | f->tag = FREETAG; | |
659 | ||
660 | aoecmd_work(d); | |
a4b38364 | 661 | sl = d->sendq_hd; |
662 | d->sendq_hd = d->sendq_tl = NULL; | |
1da177e4 LT |
663 | |
664 | spin_unlock_irqrestore(&d->lock, flags); | |
1da177e4 LT |
665 | aoenet_xmit(sl); |
666 | } | |
667 | ||
668 | void | |
669 | aoecmd_cfg(ushort aoemajor, unsigned char aoeminor) | |
670 | { | |
3ae1c24e | 671 | struct sk_buff *sl; |
1da177e4 | 672 | |
3ae1c24e | 673 | sl = aoecmd_cfg_pkts(aoemajor, aoeminor, NULL); |
1da177e4 LT |
674 | |
675 | aoenet_xmit(sl); | |
676 | } | |
677 | ||
678 | /* | |
679 | * Since we only call this in one place (and it only prepares one frame) | |
a4b38364 | 680 | * we just return the skb. Usually we'd chain it up to the aoedev sendq. |
1da177e4 LT |
681 | */ |
682 | static struct sk_buff * | |
683 | aoecmd_ata_id(struct aoedev *d) | |
684 | { | |
685 | struct aoe_hdr *h; | |
686 | struct aoe_atahdr *ah; | |
687 | struct frame *f; | |
688 | struct sk_buff *skb; | |
689 | ||
4f51dc5e | 690 | f = freeframe(d); |
1da177e4 | 691 | if (f == NULL) { |
a12c93f0 | 692 | printk(KERN_ERR "aoe: can't get a frame. This shouldn't happen.\n"); |
1da177e4 LT |
693 | return NULL; |
694 | } | |
695 | ||
696 | /* initialize the headers & frame */ | |
e407a7f6 | 697 | skb = f->skb; |
029720f1 | 698 | h = aoe_hdr(skb); |
1da177e4 | 699 | ah = (struct aoe_atahdr *) (h+1); |
19900cde EC |
700 | skb_put(skb, sizeof *h + sizeof *ah); |
701 | memset(h, 0, skb->len); | |
1da177e4 LT |
702 | f->tag = aoehdr_atainit(d, h); |
703 | f->waited = 0; | |
1da177e4 | 704 | |
1da177e4 LT |
705 | /* set up ata header */ |
706 | ah->scnt = 1; | |
707 | ah->cmdstat = WIN_IDENTIFY; | |
708 | ah->lba3 = 0xa0; | |
709 | ||
e407a7f6 | 710 | skb->dev = d->ifp; |
1da177e4 | 711 | |
3ae1c24e | 712 | d->rttavg = MAXTIMER; |
1da177e4 | 713 | d->timer.function = rexmit_timer; |
1da177e4 | 714 | |
4f51dc5e | 715 | return skb_clone(skb, GFP_ATOMIC); |
1da177e4 LT |
716 | } |
717 | ||
718 | void | |
719 | aoecmd_cfg_rsp(struct sk_buff *skb) | |
720 | { | |
721 | struct aoedev *d; | |
722 | struct aoe_hdr *h; | |
723 | struct aoe_cfghdr *ch; | |
63e9cc5d | 724 | ulong flags, sysminor, aoemajor; |
1da177e4 | 725 | struct sk_buff *sl; |
eaf0a3cb | 726 | enum { MAXFRAMES = 16 }; |
19bf2635 | 727 | u16 n; |
1da177e4 | 728 | |
029720f1 | 729 | h = aoe_hdr(skb); |
1da177e4 LT |
730 | ch = (struct aoe_cfghdr *) (h+1); |
731 | ||
732 | /* | |
733 | * Enough people have their dip switches set backwards to | |
734 | * warrant a loud message for this special case. | |
735 | */ | |
43ecf529 | 736 | aoemajor = be16_to_cpu(get_unaligned(&h->major)); |
1da177e4 | 737 | if (aoemajor == 0xfff) { |
a12c93f0 | 738 | printk(KERN_ERR "aoe: Warning: shelf address is all ones. " |
6bb6285f | 739 | "Check shelf dip switches.\n"); |
1da177e4 LT |
740 | return; |
741 | } | |
742 | ||
743 | sysminor = SYSMINOR(aoemajor, h->minor); | |
fc458dcd | 744 | if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) { |
a12c93f0 | 745 | printk(KERN_INFO "aoe: e%ld.%d: minor number too large\n", |
fc458dcd | 746 | aoemajor, (int) h->minor); |
1da177e4 LT |
747 | return; |
748 | } | |
749 | ||
19bf2635 EC |
750 | n = be16_to_cpu(ch->bufcnt); |
751 | if (n > MAXFRAMES) /* keep it reasonable */ | |
752 | n = MAXFRAMES; | |
1da177e4 | 753 | |
19bf2635 | 754 | d = aoedev_by_sysminor_m(sysminor, n); |
1da177e4 | 755 | if (d == NULL) { |
a12c93f0 | 756 | printk(KERN_INFO "aoe: device sysminor_m failure\n"); |
1da177e4 LT |
757 | return; |
758 | } | |
759 | ||
760 | spin_lock_irqsave(&d->lock, flags); | |
761 | ||
3ae1c24e EC |
762 | /* permit device to migrate mac and network interface */ |
763 | d->ifp = skb->dev; | |
764 | memcpy(d->addr, h->src, sizeof d->addr); | |
19bf2635 EC |
765 | if (!(d->flags & DEVFL_MAXBCNT)) { |
766 | n = d->ifp->mtu; | |
767 | n -= sizeof (struct aoe_hdr) + sizeof (struct aoe_atahdr); | |
768 | n /= 512; | |
769 | if (n > ch->scnt) | |
770 | n = ch->scnt; | |
4f51dc5e EC |
771 | n = n ? n * 512 : DEFAULTBCNT; |
772 | if (n != d->maxbcnt) { | |
a12c93f0 EC |
773 | printk(KERN_INFO |
774 | "aoe: e%ld.%ld: setting %d byte data frames on %s\n", | |
4f51dc5e EC |
775 | d->aoemajor, d->aoeminor, n, d->ifp->name); |
776 | d->maxbcnt = n; | |
777 | } | |
19bf2635 | 778 | } |
3ae1c24e EC |
779 | |
780 | /* don't change users' perspective */ | |
781 | if (d->nopen && !(d->flags & DEVFL_PAUSE)) { | |
1da177e4 LT |
782 | spin_unlock_irqrestore(&d->lock, flags); |
783 | return; | |
784 | } | |
3ae1c24e | 785 | d->flags |= DEVFL_PAUSE; /* force pause */ |
dced3a05 | 786 | d->mintimer = MINTIMER; |
63e9cc5d | 787 | d->fw_ver = be16_to_cpu(ch->fwver); |
1da177e4 | 788 | |
3ae1c24e EC |
789 | /* check for already outstanding ataid */ |
790 | sl = aoedev_isbusy(d) == 0 ? aoecmd_ata_id(d) : NULL; | |
1da177e4 LT |
791 | |
792 | spin_unlock_irqrestore(&d->lock, flags); | |
793 | ||
794 | aoenet_xmit(sl); | |
795 | } | |
796 |