Ed L. Cashin | 2611464 | 2006-09-20 14:36:48 -0400 | [diff] [blame] | 1 | /* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 11 | #include <linux/genhd.h> |
Ed L. Cashin | 475172f | 2005-09-29 12:47:40 -0400 | [diff] [blame] | 12 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 20 | struct sk_buff * |
| 21 | new_skb(ulong len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | skb->protocol = __constant_htons(ETH_P_AOE); |
| 29 | skb->priority = 0; |
| 30 | skb_put(skb, len); |
Ed L. Cashin | 50bba75 | 2006-01-19 12:37:24 -0500 | [diff] [blame] | 31 | memset(skb->head, 0, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | u32 host_tag = newtag(d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); |
| 75 | memcpy(h->dst, d->addr, sizeof h->dst); |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 76 | h->type = __constant_cpu_to_be16(ETH_P_AOE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | h->verfl = AOE_HVER; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 78 | h->major = cpu_to_be16(d->aoemajor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | h->minor = d->aoeminor; |
| 80 | h->cmd = AOECMD_ATA; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 81 | h->tag = cpu_to_be32(host_tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | return host_tag; |
| 84 | } |
| 85 | |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 115 | if (bcnt > d->maxbcnt) |
| 116 | bcnt = d->maxbcnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | /* initialize the headers & frame */ |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 119 | skb = f->skb; |
| 120 | h = (struct aoe_hdr *) skb->mac.raw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | ah = (struct aoe_atahdr *) (h+1); |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 122 | skb->len = sizeof *h + sizeof *ah; |
| 123 | memset(h, 0, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | f->tag = aoehdr_atainit(d, h); |
| 125 | f->waited = 0; |
| 126 | f->buf = buf; |
| 127 | f->bufaddr = buf->bufaddr; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 128 | f->bcnt = bcnt; |
| 129 | f->lba = sector; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
| 131 | /* set up ata header */ |
| 132 | ah->scnt = bcnt >> 9; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 133 | put_lba(ah, sector); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | if (d->flags & DEVFL_EXT) { |
| 135 | ah->aflags |= AOEAFL_EXT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 143 | skb_fill_page_desc(skb, 0, virt_to_page(f->bufaddr), |
| 144 | offset_in_page(f->bufaddr), bcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | ah->aflags |= AOEAFL_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } else { |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 147 | skb_shinfo(skb)->nr_frags = 0; |
| 148 | skb->len = ETH_ZLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | writebit = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 158 | /* dprintk("bv_resid=%ld\n", buf->bv_resid); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 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 | |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 198 | skb = new_skb(sizeof *h + sizeof *ch); |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 199 | if (skb == NULL) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 200 | iprintk("skb alloc failure\n"); |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 201 | continue; |
| 202 | } |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 203 | skb->dev = ifp; |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | /* enters with d->lock held */ |
| 228 | void |
| 229 | aoecmd_work(struct aoedev *d) |
| 230 | { |
| 231 | struct frame *f; |
| 232 | struct buf *buf; |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 250 | /*dprintk("bi_size=%ld\n", buf->bio->bi_size); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 262 | struct aoe_atahdr *ah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | char buf[128]; |
| 264 | u32 n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 274 | skb = f->skb; |
| 275 | h = (struct aoe_hdr *) skb->mac.raw; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 276 | ah = (struct aoe_atahdr *) (h+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | f->tag = n; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 278 | h->tag = cpu_to_be32(n); |
Ed L. Cashin | 2dd5e42 | 2006-01-19 13:46:25 -0500 | [diff] [blame] | 279 | memcpy(h->dst, d->addr, sizeof h->dst); |
| 280 | memcpy(h->src, d->ifp->dev_addr, sizeof h->src); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 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) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 290 | iprintk("too many lost jumbo - using 1KB frames.\n"); |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 291 | d->maxbcnt = DEFAULTBCNT; |
| 292 | d->flags |= DEVFL_MAXBCNT; |
| 293 | } |
| 294 | } |
| 295 | |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Ed L. Cashin | 1c6f3fc | 2006-01-25 13:54:44 -0500 | [diff] [blame] | 337 | spin_unlock_irqrestore(&d->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Ed L. Cashin | 1c6f3fc | 2006-01-25 13:54:44 -0500 | [diff] [blame] | 348 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | rexmit(d, f); |
| 351 | } |
| 352 | } |
| 353 | |
ecashin@coraid.com | a4b3836 | 2005-04-18 22:00:22 -0700 | [diff] [blame] | 354 | sl = d->sendq_hd; |
| 355 | d->sendq_hd = d->sendq_tl = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Ed L. Cashin | 475172f | 2005-09-29 12:47:40 -0400 | [diff] [blame] | 408 | n = le16_to_cpu(get_unaligned((__le16 *) &id[83<<1])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | /* word 86: command set/feature enabled */ |
Ed L. Cashin | 475172f | 2005-09-29 12:47:40 -0400 | [diff] [blame] | 411 | n |= le16_to_cpu(get_unaligned((__le16 *) &id[86<<1])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
| 413 | if (n & (1<<10)) { /* bit 10: LBA 48 */ |
| 414 | d->flags |= DEVFL_EXT; |
| 415 | |
| 416 | /* word 100: number lba48 sectors */ |
Ed L. Cashin | 475172f | 2005-09-29 12:47:40 -0400 | [diff] [blame] | 417 | ssize = le64_to_cpu(get_unaligned((__le64 *) &id[100<<1])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Ed L. Cashin | 475172f | 2005-09-29 12:47:40 -0400 | [diff] [blame] | 428 | ssize = le32_to_cpu(get_unaligned((__le32 *) &id[60<<1])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | /* NOTE: obsolete in ATA 6 */ |
Ed L. Cashin | 475172f | 2005-09-29 12:47:40 -0400 | [diff] [blame] | 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])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 435 | |
| 436 | if (d->ssize != ssize) |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 437 | iprintk("%012llx e%lu.%lu v%04x has %llu sectors\n", |
| 438 | (unsigned long long)mac_addr(d->addr), |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 439 | d->aoemajor, d->aoeminor, |
| 440 | d->fw_ver, (long long)ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | d->ssize = ssize; |
| 442 | d->geo.start = 0; |
| 443 | if (d->gd != NULL) { |
| 444 | d->gd->capacity = ssize; |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 445 | d->flags |= DEVFL_NEWSIZE; |
| 446 | } else { |
| 447 | if (d->flags & DEVFL_GDALLOC) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 448 | eprintk("can't schedule work for e%lu.%lu, %s\n", |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 449 | d->aoemajor, d->aoeminor, |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 450 | "it's already on! This shouldn't happen.\n"); |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 451 | return; |
| 452 | } |
| 453 | d->flags |= DEVFL_GDALLOC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | schedule_work(&d->work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | static void |
| 459 | calc_rttavg(struct aoedev *d, int rtt) |
| 460 | { |
| 461 | register long n; |
| 462 | |
| 463 | n = rtt; |
Ed L. Cashin | dced3a0 | 2006-09-20 14:36:49 -0400 | [diff] [blame^] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Ed L. Cashin | ddec63e | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 485 | struct aoe_hdr *hin, *hout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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]; |
ecashin@coraid.com | 32465c6 | 2005-04-18 22:00:18 -0700 | [diff] [blame] | 493 | u16 aoemajor; |
| 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | hin = (struct aoe_hdr *) skb->mac.raw; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 496 | aoemajor = be16_to_cpu(hin->major); |
ecashin@coraid.com | 32465c6 | 2005-04-18 22:00:18 -0700 | [diff] [blame] | 497 | d = aoedev_by_aoeaddr(aoemajor, hin->minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | if (d == NULL) { |
| 499 | snprintf(ebuf, sizeof ebuf, "aoecmd_ata_rsp: ata response " |
| 500 | "for unknown device %d.%d\n", |
ecashin@coraid.com | 32465c6 | 2005-04-18 22:00:18 -0700 | [diff] [blame] | 501 | aoemajor, hin->minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | aoechr_error(ebuf); |
| 503 | return; |
| 504 | } |
| 505 | |
| 506 | spin_lock_irqsave(&d->lock, flags); |
| 507 | |
Ed L. Cashin | dced3a0 | 2006-09-20 14:36:49 -0400 | [diff] [blame^] | 508 | n = be32_to_cpu(hin->tag); |
| 509 | f = getframe(d, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | if (f == NULL) { |
Ed L. Cashin | dced3a0 | 2006-09-20 14:36:49 -0400 | [diff] [blame^] | 511 | calc_rttavg(d, -tsince(n)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | spin_unlock_irqrestore(&d->lock, flags); |
| 513 | snprintf(ebuf, sizeof ebuf, |
| 514 | "%15s e%d.%d tag=%08x@%08lx\n", |
| 515 | "unexpected rsp", |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 516 | be16_to_cpu(hin->major), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | hin->minor, |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 518 | be32_to_cpu(hin->tag), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Ed L. Cashin | ddec63e | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 527 | hout = (struct aoe_hdr *) f->skb->mac.raw; |
| 528 | ahout = (struct aoe_atahdr *) (hout+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | buf = f->buf; |
| 530 | |
Ed L. Cashin | 9d41965 | 2006-02-07 11:37:24 -0500 | [diff] [blame] | 531 | if (ahout->cmdstat == WIN_IDENTIFY) |
| 532 | d->flags &= ~DEVFL_PAUSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if (ahin->cmdstat & 0xa9) { /* these bits cleared on success */ |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 534 | eprintk("ata error cmd=%2.2Xh stat=%2.2Xh from e%ld.%ld\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | ahout->cmdstat, ahin->cmdstat, |
| 536 | d->aoemajor, d->aoeminor); |
| 537 | if (buf) |
| 538 | buf->flags |= BUFFL_FAIL; |
| 539 | } else { |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 540 | n = ahout->scnt << 9; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | switch (ahout->cmdstat) { |
| 542 | case WIN_READ: |
| 543 | case WIN_READ_EXT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | if (skb->len - sizeof *hin - sizeof *ahin < n) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 545 | eprintk("runt data size in read. skb->len=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 554 | if (f->bcnt -= n) { |
| 555 | f->bufaddr += n; |
| 556 | put_lba(ahout, f->lba += ahout->scnt); |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 557 | n = f->bcnt; |
| 558 | if (n > DEFAULTBCNT) |
| 559 | n = DEFAULTBCNT; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 560 | ahout->scnt = n >> 9; |
| 561 | if (ahout->aflags & AOEAFL_WRITE) |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 562 | skb_fill_page_desc(f->skb, 0, |
| 563 | virt_to_page(f->bufaddr), |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 564 | offset_in_page(f->bufaddr), n); |
Ed L. Cashin | ddec63e | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 565 | f->tag = newtag(d); |
| 566 | hout->tag = cpu_to_be32(f->tag); |
| 567 | skb->dev = d->ifp; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | break; |
| 577 | case WIN_IDENTIFY: |
| 578 | if (skb->len - sizeof *hin - sizeof *ahin < 512) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 579 | iprintk("runt data size in ataid. skb->len=%d\n", |
| 580 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | spin_unlock_irqrestore(&d->lock, flags); |
| 582 | return; |
| 583 | } |
| 584 | ataid_complete(d, (char *) (ahin+1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | break; |
| 586 | default: |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 587 | iprintk("unrecognized ata command %2.2Xh for %d.%d\n", |
| 588 | ahout->cmdstat, |
| 589 | be16_to_cpu(hin->major), |
| 590 | hin->minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | } |
| 592 | } |
| 593 | |
| 594 | if (buf) { |
| 595 | buf->nframesout -= 1; |
| 596 | if (buf->nframesout == 0 && buf->resid == 0) { |
ecashin@coraid.com | 0c6f0e7 | 2005-04-18 22:00:22 -0700 | [diff] [blame] | 597 | unsigned long duration = jiffies - buf->start_time; |
| 598 | unsigned long n_sect = buf->bio->bi_size >> 9; |
| 599 | struct gendisk *disk = d->gd; |
Jens Axboe | 496456c | 2005-11-01 09:54:23 +0100 | [diff] [blame] | 600 | const int rw = bio_data_dir(buf->bio); |
ecashin@coraid.com | 0c6f0e7 | 2005-04-18 22:00:22 -0700 | [diff] [blame] | 601 | |
Jens Axboe | 496456c | 2005-11-01 09:54:23 +0100 | [diff] [blame] | 602 | disk_stat_inc(disk, ios[rw]); |
| 603 | disk_stat_add(disk, ticks[rw], duration); |
| 604 | disk_stat_add(disk, sectors[rw], n_sect); |
ecashin@coraid.com | 0c6f0e7 | 2005-04-18 22:00:22 -0700 | [diff] [blame] | 605 | disk_stat_add(disk, io_ticks, duration); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
ecashin@coraid.com | a4b3836 | 2005-04-18 22:00:22 -0700 | [diff] [blame] | 616 | sl = d->sendq_hd; |
| 617 | d->sendq_hd = d->sendq_tl = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | spin_unlock_irqrestore(&d->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | aoenet_xmit(sl); |
| 621 | } |
| 622 | |
| 623 | void |
| 624 | aoecmd_cfg(ushort aoemajor, unsigned char aoeminor) |
| 625 | { |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 626 | struct sk_buff *sl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 628 | sl = aoecmd_cfg_pkts(aoemajor, aoeminor, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | |
| 630 | aoenet_xmit(sl); |
| 631 | } |
| 632 | |
| 633 | /* |
| 634 | * Since we only call this in one place (and it only prepares one frame) |
ecashin@coraid.com | a4b3836 | 2005-04-18 22:00:22 -0700 | [diff] [blame] | 635 | * we just return the skb. Usually we'd chain it up to the aoedev sendq. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 647 | eprintk("can't get a frame. This shouldn't happen.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | return NULL; |
| 649 | } |
| 650 | |
| 651 | /* initialize the headers & frame */ |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 652 | skb = f->skb; |
| 653 | h = (struct aoe_hdr *) skb->mac.raw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | ah = (struct aoe_atahdr *) (h+1); |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 655 | skb->len = sizeof *h + sizeof *ah; |
| 656 | memset(h, 0, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | f->tag = aoehdr_atainit(d, h); |
| 658 | f->waited = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | /* set up ata header */ |
| 661 | ah->scnt = 1; |
| 662 | ah->cmdstat = WIN_IDENTIFY; |
| 663 | ah->lba3 = 0xa0; |
| 664 | |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 665 | skb->dev = d->ifp; |
| 666 | skb_get(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 668 | d->rttavg = MAXTIMER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | d->timer.function = rexmit_timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 680 | ulong flags, sysminor, aoemajor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | struct sk_buff *sl; |
Ed L. Cashin | eaf0a3c | 2006-01-19 13:46:20 -0500 | [diff] [blame] | 682 | enum { MAXFRAMES = 16 }; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 683 | u16 n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 692 | aoemajor = be16_to_cpu(h->major); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | if (aoemajor == 0xfff) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 694 | eprintk("Warning: shelf address is all ones. " |
| 695 | "Check shelf dip switches.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | return; |
| 697 | } |
| 698 | |
| 699 | sysminor = SYSMINOR(aoemajor, h->minor); |
ecashin@coraid.com | fc458dc | 2005-04-18 22:00:17 -0700 | [diff] [blame] | 700 | if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 701 | iprintk("e%ld.%d: minor number too large\n", |
ecashin@coraid.com | fc458dc | 2005-04-18 22:00:17 -0700 | [diff] [blame] | 702 | aoemajor, (int) h->minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | return; |
| 704 | } |
| 705 | |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 706 | n = be16_to_cpu(ch->bufcnt); |
| 707 | if (n > MAXFRAMES) /* keep it reasonable */ |
| 708 | n = MAXFRAMES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 710 | d = aoedev_by_sysminor_m(sysminor, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | if (d == NULL) { |
Ed L. Cashin | 6bb6285 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 712 | iprintk("device sysminor_m failure\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | return; |
| 714 | } |
| 715 | |
| 716 | spin_lock_irqsave(&d->lock, flags); |
| 717 | |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 718 | /* permit device to migrate mac and network interface */ |
| 719 | d->ifp = skb->dev; |
| 720 | memcpy(d->addr, h->src, sizeof d->addr); |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 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 | } |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 729 | |
| 730 | /* don't change users' perspective */ |
| 731 | if (d->nopen && !(d->flags & DEVFL_PAUSE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | spin_unlock_irqrestore(&d->lock, flags); |
| 733 | return; |
| 734 | } |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 735 | d->flags |= DEVFL_PAUSE; /* force pause */ |
Ed L. Cashin | dced3a0 | 2006-09-20 14:36:49 -0400 | [diff] [blame^] | 736 | d->mintimer = MINTIMER; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 737 | d->fw_ver = be16_to_cpu(ch->fwver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 739 | /* check for already outstanding ataid */ |
| 740 | sl = aoedev_isbusy(d) == 0 ? aoecmd_ata_id(d) : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | |
| 742 | spin_unlock_irqrestore(&d->lock, flags); |
| 743 | |
| 744 | aoenet_xmit(sl); |
| 745 | } |
| 746 | |