aboutsummaryrefslogtreecommitdiff
path: root/blockdev.c
diff options
context:
space:
mode:
authorJohn Snow <jsnow@redhat.com>2014-10-01 14:19:27 -0400
committerStefan Hajnoczi <stefanha@redhat.com>2014-10-03 10:30:33 +0100
commitd8f94e1bb275ab6a14a15220fd6afd0d04324aeb (patch)
treeb24bbaf0487f1288af282314c817c53ff3a06bed /blockdev.c
parent1602651833c081e32366c9e534ad72e4287840c5 (diff)
downloadqemu-d8f94e1bb275ab6a14a15220fd6afd0d04324aeb.zip
qemu-d8f94e1bb275ab6a14a15220fd6afd0d04324aeb.tar.gz
qemu-d8f94e1bb275ab6a14a15220fd6afd0d04324aeb.tar.bz2
ide: Update ide_drive_get to be HBA agnostic
Instead of duplicating the logic for the if_ide (bus,unit) mappings, rely on the blockdev layer for managing those mappings for us, and use the drive_get_by_index call instead. This allows ide_drive_get to work for AHCI HBAs as well, and can be used in the Q35 initialization. Lastly, change the nature of the argument to ide_drive_get so that represents the number of total drives we can support, and not the total number of buses. This will prevent array overflows if the units-per-default-bus property ever needs to be adjusted for compatibility reasons. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-id: 1412187569-23452-5-git-send-email-jsnow@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'blockdev.c')
-rw-r--r--blockdev.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c
index 1780d77..e595910 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -135,6 +135,23 @@ void blockdev_auto_del(BlockDriverState *bs)
}
}
+/**
+ * Returns the current mapping of how many units per bus
+ * a particular interface can support.
+ *
+ * A positive integer indicates n units per bus.
+ * 0 implies the mapping has not been established.
+ * -1 indicates an invalid BlockInterfaceType was given.
+ */
+int drive_get_max_devs(BlockInterfaceType type)
+{
+ if (type >= IF_IDE && type < IF_COUNT) {
+ return if_max_devs[type];
+ }
+
+ return -1;
+}
+
static int drive_index_to_bus_id(BlockInterfaceType type, int index)
{
int max_devs = if_max_devs[type];