libqos/ahci: ATAPI identify

We need to say "hello!" to our ATAPI friends
in a slightly different manner.
Signed-off-by: NJohn Snow <jsnow@redhat.com>
Message-id: 1452282920-21550-4-git-send-email-jsnow@redhat.com

tests/ahci-test.c

@@ -215,6 +215,7 @@ static AHCIQState *ahci_boot_and_enable(const char *cli, ...)
     va_list ap;
     uint16_t buff[256];
     uint8_t port;
+    uint8_t hello;
 
     if (cli) {
         va_start(ap, cli);
@@ -229,7 +230,12 @@ static AHCIQState *ahci_boot_and_enable(const char *cli, ...)
     /* Initialize test device */
     port = ahci_port_select(ahci);
     ahci_port_clear(ahci, port);
-    ahci_io(ahci, port, CMD_IDENTIFY, &buff, sizeof(buff), 0);
+    if (is_atapi(ahci, port)) {
+        hello = CMD_PACKET_ID;
+    } else {
+        hello = CMD_IDENTIFY;
+    }
+    ahci_io(ahci, port, hello, &buff, sizeof(buff), 0);
 
     return ahci;
 }

tests/libqos/ahci.c

@@ -114,6 +114,11 @@ void ahci_free(AHCIQState *ahci, uint64_t addr)
     qfree(ahci->parent, addr);
 }
 
+bool is_atapi(AHCIQState *ahci, uint8_t port)
+{
+    return ahci_px_rreg(ahci, port, AHCI_PX_SIG) == AHCI_SIGNATURE_CDROM;
+}
+
 /**
  * Locate, verify, and return a handle to the AHCI device.
  */

tests/libqos/ahci.h

@@ -596,5 +596,6 @@ void ahci_command_adjust(AHCICommand *cmd, uint64_t lba_sect, uint64_t gbuffer,
 
 /* Command Misc */
 uint8_t ahci_command_slot(AHCICommand *cmd);
+bool is_atapi(AHCIQState *ahci, uint8_t port);
 
 #endif