int
scsicmd(Scsi *s, uchar *cmd, int ccount, void *data, int dcount, int io)
{
return _scsicmd(s, cmd, ccount, data, dcount, io, 1);
}
int
scsi(Scsi *s, uchar *cmd, int ccount, void *v, int dcount, int io)
{
uchar req[6], sense[255], *data;
int tries, code, key, n;
char *p;
data = v;
SET(key); SET(code);
qlock(&s->lk);
for(tries=0; tries<2; tries++) {
n = _scsicmd(s, cmd, ccount, data, dcount, io, 0);
if(n >= 0) {
qunlock(&s->lk);
return n;
}
/*
* request sense
*/
memset(req, 0, sizeof(req));
req[0] = 0x03;
req[4] = sizeof(sense);
memset(sense, 0xFF, sizeof(sense));
if((n=_scsicmd(s, req, sizeof(req), sense, sizeof(sense), Sread, 0)) < 14)
if(scsiverbose)
fprint(2, "reqsense scsicmd %d: %r\n", n);
if(_scsiready(s, 0) < 0)
if(scsiverbose)
fprint(2, "unit not ready\n");
key = sense[2];
code = sense[12];
if(code == 0x17 || code == 0x18) { /* recovered errors */
qunlock(&s->lk);
return dcount;
}
if(code == 0x28 && cmd[0] == 0x43) { /* get info and media changed */
s->nchange++;
s->changetime = time(0);
continue;
}
}
/* drive not ready, or medium not present */
if(cmd[0] == 0x43 && key == 2 && (code == 0x3a || code == 0x04)) {
s->changetime = 0;
qunlock(&s->lk);
return -1;
}
qunlock(&s->lk);
if(cmd[0] == 0x43 && key == 5 && code == 0x24) /* blank media */
return -1;
p = scsierror(code, sense[13]);
werrstr("cmd #%.2ux: %s", cmd[0], p);
if(scsiverbose)
fprint(2, "scsi cmd #%.2ux: %.2ux %.2ux %.2ux: %s\n", cmd[0], key, code, sense[13], p);
/* if(key == 0) */
/* return dcount; */
return -1;
}
int
scsi(Scsi *s, uchar *cmd, int ccount, void *v, int dcount, int io)
{
uchar req[6], sense[255], *data;
int tries, code, key, n;
char *p;
data = v;
SET(key, code);
qlock(s);
for(tries=0; tries<2; tries++) {
n = _scsicmd(s, cmd, ccount, data, dcount, io, 0);
if(n >= 0) {
qunlock(s);
return n;
}
/*
* request sense
*/
memset(req, 0, sizeof(req));
req[0] = Reqsense;
req[4] = sizeof(sense);
memset(sense, 0xFF, sizeof(sense));
if((n=_scsicmd(s, req, sizeof(req), sense, sizeof(sense), Sread, 0)) < 14)
if(scsiverbose)
fprint(2, "reqsense scsicmd %d: %r\n", n);
if(_scsiready(s, 0) < 0)
if(scsiverbose)
fprint(2, "unit not ready\n");
key = sense[2] & 0xf;
code = sense[12]; /* asc */
if(code == Recovnoecc || code == Recovecc) { /* recovered errors */
qunlock(s);
return dcount;
}
/* retry various odd cases */
if(code == Newmedium && cmd[0] == Readtoc) {
/* read toc and media changed */
s->nchange++;
s->changetime = time(0);
} else if((cmd[0] == Write10 || cmd[0] == Writever10) &&
key == Sensenotrdy &&
code == Lunnotrdy && sense[13] == 0x08) {
/* long write in progress, per mmc-6 */
tries = 0;
sleep(1);
}
}
/* drive not ready, or medium not present */
if(cmd[0] == Readtoc && key == Sensenotrdy &&
(code == Nomedium || code == Lunnotrdy)) {
s->changetime = 0;
qunlock(s);
return -1;
}
qunlock(s);
if(cmd[0] == Readtoc && key == Sensebadreq && code == Badcdb)
return -1; /* blank media */
p = scsierror(code, sense[13]);
werrstr("cmd #%.2ux: %s", cmd[0], p);
if(scsiverbose)
fprint(2, "scsi cmd #%.2ux: %.2ux %.2ux %.2ux: %s\n",
cmd[0], key, code, sense[13], p);
// if(key == Sensenone)
// return dcount;
return -1;
}
