libqos/ahci: Add ahci_guest_io

ahci_guest_io is a shorthand function that will, in one shot,
execute a data command on the guest to the specified guest buffer
location, in the requested amount.
Signed-off-by: NJohn Snow <jsnow@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Message-id: 1423158090-25580-16-git-send-email-jsnow@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

tests/libqos/ahci.c

@@ -548,6 +548,21 @@ inline unsigned size_to_prdtl(unsigned bytes, unsigned bytes_per_prd)
     return (bytes + bytes_per_prd - 1) / bytes_per_prd;
 }
 
+/* Given a guest buffer address, perform an IO operation */
+void ahci_guest_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
+                   uint64_t buffer, size_t bufsize)
+{
+    AHCICommand *cmd;
+
+    cmd = ahci_command_create(ide_cmd);
+    ahci_command_set_buffer(cmd, buffer);
+    ahci_command_set_size(cmd, bufsize);
+    ahci_command_commit(ahci, cmd, port);
+    ahci_command_issue(ahci, cmd);
+    ahci_command_verify(ahci, cmd);
+    ahci_command_free(cmd);
+}
+
 struct AHCICommand {
     /* Test Management Data */
     uint8_t name;

tests/libqos/ahci.h

@@ -521,6 +521,8 @@ void ahci_destroy_command(AHCIQState *ahci, uint8_t port, uint8_t slot);
 void ahci_write_fis(AHCIQState *ahci, RegH2DFIS *fis, uint64_t addr);
 unsigned ahci_pick_cmd(AHCIQState *ahci, uint8_t port);
 unsigned size_to_prdtl(unsigned bytes, unsigned bytes_per_prd);
+void ahci_guest_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
+                   uint64_t gbuffer, size_t size);
 
 /* Command Lifecycle */
 AHCICommand *ahci_command_create(uint8_t command_name);