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#include <u.h>
#include <libc.h>
#include <fis.h>
#include "smart.h"
enum{
Nop,
Idall,
Idpkt,
Smart,
Id,
Sig,
Cmdsz = 18,
Replysz = 18,
};
typedef struct Atatab Atatab;
struct Atatab {
ushort cc;
uchar protocol;
char *name;
};
Atatab atatab[] = {
[Nop] 0x00, Pnd|P28, "nop",
[Idall] 0xff, Pin|Ppio|P28, "identify * device",
[Idpkt] 0xa1, Pin|Ppio|P28, "identify packet device",
[Smart] 0xb0, Pnd|P28, "smart",
[Id] 0xec, Pin|Ppio|P28, "identify device",
[Sig] 0xf000, Pnd|P28, "signature",
};
typedef struct Rcmd Rcmd;
struct Rcmd{
uchar sdcmd; /* sd command; 0xff means ata passthrough */
uchar ataproto; /* ata protocol. non-data, pio, reset, dd, etc. */
uchar fis[Fissize];
};
typedef struct Req Req;
struct Req {
char haverfis;
Rcmd cmd;
Rcmd reply;
uchar data[0x200];
uint count;
};
static int
issueata(Req *r, Sdisk *d, int errok)
{
char buf[ERRMAX];
int ok, rv;
if((rv = write(d->fd, &r->cmd, Cmdsz)) != Cmdsz){
/* handle non-atazz compatable kernels */
rerrstr(buf, sizeof buf);
if(rv != -1 || strstr(buf, "bad arg in system call") != 0)
eprint(d, "fis write error: %r\n");
return -1;
}
werrstr("");
switch(r->cmd.ataproto & Pdatam){
default:
ok = read(d->fd, "", 0) == 0;
break;
case Pin:
ok = read(d->fd, r->data, r->count) == r->count;
break;
case Pout:
ok = write(d->fd, r->data, r->count) == r->count;
break;
}
rv = 0;
if(ok == 0){
rerrstr(buf, sizeof buf);
if(!errok && strstr(buf, "not sata") == 0)
eprint(d, "xfer error: %.2ux%.2ux: %r\n", r->cmd.fis[0], r->cmd.fis[2]);
rv = -1;
}
if(read(d->fd, &r->reply, Replysz) != Replysz){
if(!errok)
eprint(d, "status fis read error: %r\n");
return -1;
}
r->haverfis = 1;
return rv;
}
int
issueatat(Req *r, int i, Sdisk *d, int e)
{
uchar *fis;
Atatab *a;
a = atatab + i;
r->haverfis = 0;
r->cmd.sdcmd = 0xff;
r->cmd.ataproto = a->protocol;
fis = r->cmd.fis;
fis[0] = H2dev;
if(a->cc & 0xff00)
fis[0] = a->cc >> 8;
fis[1] = Fiscmd;
if(a->cc != 0xff)
fis[2] = a->cc;
return issueata(r, d, e);
}
int
ataprobe(Sdisk *d)
{
int rv;
Req r;
memset(&r, 0, sizeof r);
if(issueatat(&r, Sig, d, 1) == -1)
return -1;
setfissig(d, fistosig(r.reply.fis));
memset(&r, 0, sizeof r);
r.count = 0x200;
identifyfis(d, r.cmd.fis);
if((rv = issueatat(&r, Idall, d, 1)) != -1){
idfeat(d, (ushort*)r.data);
if((d->feat & Dsmart) == 0)
rv = -1;
}
return rv;
}
int
smartfis(Sfis *f, uchar *c, int n)
{
if((f->feat & Dsmart) == 0)
return -1;
skelfis(c);
c[2] = 0xb0;
c[3] = 0xd8 + n; /* able smart */
c[5] = 0x4f;
c[6] = 0xc2;
return 0;
}
int
ataenable(Sdisk *d)
{
int rv;
Req r;
memset(&r, 0, sizeof r);
smartfis(d, r.cmd.fis, 0);
rv = issueatat(&r, Smart, d, 0);
return rv;
}
void
smartrsfis(Sfis*, uchar *c)
{
skelfis(c);
c[2] = 0xb0;
c[3] = 0xda; /* return smart status */
c[5] = 0x4f;
c[6] = 0xc2;
}
int
atastatus(Sdisk *d, char *s, int l)
{
uchar *fis;
int rv;
Req r;
memset(&r, 0, sizeof r);
smartrsfis(d, r.cmd.fis);
rv = issueatat(&r, Smart, d, 0);
*s = 0;
if(rv != -1){
fis = r.reply.fis;
if(fis[5] == 0x4f &&
fis[6] == 0xc2)
snprint(s, l, "normal");
else{
snprint(s, l, "threshold exceeded");
rv = -1;
}
} else
snprint(s, l, "smart error");
return rv;
}
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