Fix ATA SMART and CHECK POWER MODE

This patch fixes two things:

 1) CHECK POWER MODE

The error return value wasn't always zero, so it would show up as
offline.  Error is now explicitly set to zero.

 2) SMART

The smart values that were returned were invalid and tools like skdump
would not recognize that the smart data was actually valid and would
dump weird output.  The data has been fixed up and raw value support
was added.  Tools like skdump and palimpsest work as expected.
Signed-off-by: NBrian Wheeler <bdwheele@indiana.edu>
Acked-by: NRyan Harper <ryanh@us.ibm.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

hw/ide/core.c

@@ -34,13 +34,26 @@
 
 #include <hw/ide/internal.h>
 
-static const int smart_attributes[][5] = {
-    /* id,  flags, val, wrst, thrsh */
-    { 0x01, 0x03, 0x64, 0x64, 0x06}, /* raw read */
-    { 0x03, 0x03, 0x64, 0x64, 0x46}, /* spin up */
-    { 0x04, 0x02, 0x64, 0x64, 0x14}, /* start stop count */
-    { 0x05, 0x03, 0x64, 0x64, 0x36}, /* remapped sectors */
-    { 0x00, 0x00, 0x00, 0x00, 0x00}
+/* These values were based on a Seagate ST3500418AS but have been modified
+   to make more sense in QEMU */
+static const int smart_attributes[][12] = {
+    /* id,  flags, hflags, val, wrst, raw (6 bytes), threshold */
+    /* raw read error rate*/
+    { 0x01, 0x03, 0x00, 0x64, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06},
+    /* spin up */
+    { 0x03, 0x03, 0x00, 0x64, 0x64, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    /* start stop count */
+    { 0x04, 0x02, 0x00, 0x64, 0x64, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14},
+    /* remapped sectors */
+    { 0x05, 0x03, 0x00, 0x64, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24},
+    /* power on hours */
+    { 0x09, 0x03, 0x00, 0x64, 0x64, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    /* power cycle count */
+    { 0x0c, 0x03, 0x00, 0x64, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    /* airflow-temperature-celsius */
+    { 190,  0x03, 0x00, 0x45, 0x45, 0x1f, 0x00, 0x1f, 0x1f, 0x00, 0x00, 0x32},
+    /* end of list */
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
 };
 
 /* XXX: DVDs that could fit on a CD will be reported as a CD */
@@ -1843,6 +1856,7 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val)
         break;
     case WIN_CHECKPOWERMODE1:
     case WIN_CHECKPOWERMODE2:
+        s->error = 0;
         s->nsector = 0xff; /* device active or idle */
         s->status = READY_STAT | SEEK_STAT;
         ide_set_irq(s->bus);
@@ -2097,7 +2111,7 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val)
 		if (smart_attributes[n][0] == 0)
 			break;
 		s->io_buffer[2+0+(n*12)] = smart_attributes[n][0];
-		s->io_buffer[2+1+(n*12)] = smart_attributes[n][4];
+		s->io_buffer[2+1+(n*12)] = smart_attributes[n][11];
 		}
 		for (n=0; n<511; n++) /* checksum */
 		s->io_buffer[511] += s->io_buffer[n];
@@ -2110,12 +2124,13 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val)
 		memset(s->io_buffer, 0, 0x200);
 		s->io_buffer[0] = 0x01; /* smart struct version */
 		for (n=0; n<30; n++) {
-		if (smart_attributes[n][0] == 0)
+		    if (smart_attributes[n][0] == 0) {
 			break;
-		s->io_buffer[2+0+(n*12)] = smart_attributes[n][0];
-		s->io_buffer[2+1+(n*12)] = smart_attributes[n][1];
-		s->io_buffer[2+3+(n*12)] = smart_attributes[n][2];
-		s->io_buffer[2+4+(n*12)] = smart_attributes[n][3];
+		    }
+		    int i;
+		    for(i = 0; i < 11; i++) {
+			s->io_buffer[2+i+(n*12)] = smart_attributes[n][i];
+		    }
 		}
 		s->io_buffer[362] = 0x02 | (s->smart_autosave?0x80:0x00);
 		if (s->smart_selftest_count == 0) {