static void
atarw(Aoedev *d, Frame *f)
{
ulong bcnt;
char extbit, writebit;
Aoeata *ah;
Srb *srb;
extbit = 0x4;
writebit = 0x10;
srb = d->inprocess;
bcnt = d->maxbcnt;
if(bcnt > srb->len)
bcnt = srb->len;
f->nhdr = AOEATASZ;
memset(f->hdr, 0, f->nhdr);
ah = (Aoeata*)f->hdr;
if(hset(d, f, ah, ACata) == -1)
return;
f->dp = srb->dp;
f->bcnt = bcnt;
f->lba = srb->sector;
f->srb = srb;
ah->scnt = bcnt / Aoesectsz;
putlba(ah, f->lba);
if(d->flag & Dllba)
ah->aflag |= AAFext;
else {
extbit = 0;
ah->lba[3] &= 0x0f;
ah->lba[3] |= 0xe0; /* LBA bit+obsolete 0xa0 */
}
if(srb->write){
ah->aflag |= AAFwrite;
f->dlen = bcnt;
}else{
writebit = 0;
f->dlen = 0;
}
ah->cmdstat = 0x20 | writebit | extbit;
/* mark tracking fields and load out */
srb->nout++;
srb->dp = (uchar*)srb->dp + bcnt;
srb->len -= bcnt;
srb->sector += bcnt / Aoesectsz;
if(srb->len == 0)
d->inprocess = nil;
d->nout++;
f->dl->npkt++;
if(waserror()){
f->tag = Tfree;
d->inprocess = nil;
nexterror();
}
f->nl->dc->dev->bwrite(f->nl->dc, allocfb(f), 0);
poperror();
}
static int
resend(Aoedev *d, Frame *f)
{
ulong n;
Aoeata *a;
a = (Aoeata*)f->hdr;
if(hset(d, f, a, a->cmd) == -1)
return -1;
n = f->bcnt;
if(n > d->maxbcnt){
n = d->maxbcnt; /* mtu mismatch (jumbo fail?) */
if(f->dlen > n)
f->dlen = n;
}
a->scnt = n / Aoesectsz;
f->dl->resent++;
f->dl->npkt++;
if(waserror())
return -1;
devtab[f->nl->dc->type]->bwrite(f->nl->dc, allocfb(f), 0);
poperror();
return 0;
}