static long
loopbio(SDunit *u, int, int write, void *a, long count, uvlong lba)
{
uchar *data;
int n;
long (*rio)(Chan*, void*, long, vlong);
Ctlr *c;
c = u->dev->ctlr;
data = a;
if(write)
rio = devtab[c->c->type]->write;
else
rio = devtab[c->c->type]->read;
if(waserror()){
if(strcmp(up->errstr, Echange) == 0 ||
strstr(up->errstr, "device is down") != nil)
u->sectors = 0;
nexterror();
}
n = rio(c->c, data, c->sectsize * count, c->sectsize * lba);
poperror();
return n;
}
static long
aoebio(SDunit *u, int, int write, void *a, long count, uvlong lba)
{
uchar *data;
int n;
long (*rio)(Chan*, void*, long, vlong);
Ctlr *c;
c = u->dev->ctlr;
// if(c->feat & Datapi)
// return scsibio(u, lun, write, a, count, lba);
data = a;
if(write)
rio = devtab[c->c->type]->write;
else
rio = devtab[c->c->type]->read;
if(waserror()) {
if(strcmp(up->errstr, Echange) == 0 ||
strcmp(up->errstr, Enotup) == 0)
u->sectors = 0;
nexterror();
}
n = rio(c->c, data, Aoesectsz * count, Aoesectsz * lba);
poperror();
return n;
}
static int
aoerio(SDreq *r)
{
int i, count;
uvlong lba;
char *name;
uchar *cmd;
long (*rio)(Chan*, void*, long, vlong);
Ctlr *c;
SDunit *unit;
unit = r->unit;
c = unit->dev->ctlr;
// if(c->feat & Datapi)
// return aoeriopkt(r, d);
cmd = r->cmd;
name = unit->name;
if(r->cmd[0] == 0x35 || r->cmd[0] == 0x91){
// qlock(c);
// i = flushcache();
// qunlock(c);
// if(i == 0)
// return sdsetsense(r, SDok, 0, 0, 0);
return sdsetsense(r, SDcheck, 3, 0xc, 2);
}
if((i = sdfakescsi(r, c->ident, sizeof c->ident)) != SDnostatus){
r->status = i;
return i;
}
switch(*cmd){
case 0x88:
case 0x28:
rio = devtab[c->c->type]->read;
break;
case 0x8a:
case 0x2a:
rio = devtab[c->c->type]->write;
break;
default:
print("%s: bad cmd %#.2ux\n", name, cmd[0]);
r->status = SDcheck;
return SDcheck;
}
if(r->data == nil)
return SDok;
if(r->clen == 16){
if(cmd[2] || cmd[3])
return sdsetsense(r, SDcheck, 3, 0xc, 2);
lba = (uvlong)cmd[4]<<40 | (uvlong)cmd[5]<<32;
lba |= cmd[6]<<24 | cmd[7]<<16 | cmd[8]<<8 | cmd[9];
count = cmd[10]<<24 | cmd[11]<<16 | cmd[12]<<8 | cmd[13];
}else{
lba = cmd[2]<<24 | cmd[3]<<16 | cmd[4]<<8 | cmd[5];
count = cmd[7]<<8 | cmd[8];
}
count *= Aoesectsz;
if(r->dlen < count)
count = r->dlen & ~0x1ff;
if(waserror()){
if(strcmp(up->errstr, Echange) == 0 ||
strcmp(up->errstr, Eaoedown) == 0)
unit->sectors = 0;
nexterror();
}
r->rlen = rio(c->c, r->data, count, Aoesectsz * lba);
poperror();
r->status = SDok;
return SDok;
}
