qdev: Add SIZE type to qdev properties

This patch adds a 'SIZE' type property to qdev.
Signed-off-by: NIan Molton <ian.molton@collabora.co.uk>
Signed-off-by: NVasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
Signed-off-by: NHu Tao <hutao@cn.fujitsu.com>
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NAndreas Färber <afaerber@suse.de>
Message-id: 1375109277-25561-7-git-send-email-imammedo@redhat.com
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/core/qdev-properties.c

@@ -1135,3 +1135,58 @@ void qdev_prop_set_globals(DeviceState *dev, Error **errp)
         class = object_class_get_parent(class);
     } while (class);
 }
+
+/* --- 64bit unsigned int 'size' type --- */
+
+static void get_size(Object *obj, Visitor *v, void *opaque,
+                     const char *name, Error **errp)
+{
+    DeviceState *dev = DEVICE(obj);
+    Property *prop = opaque;
+    uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
+
+    visit_type_size(v, ptr, name, errp);
+}
+
+static void set_size(Object *obj, Visitor *v, void *opaque,
+                     const char *name, Error **errp)
+{
+    DeviceState *dev = DEVICE(obj);
+    Property *prop = opaque;
+    uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
+
+    visit_type_size(v, ptr, name, errp);
+}
+
+static int parse_size(DeviceState *dev, Property *prop, const char *str)
+{
+    uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
+    Error *errp = NULL;
+
+    if (str != NULL) {
+        parse_option_size(prop->name, str, ptr, &errp);
+    }
+    assert_no_error(errp);
+    return 0;
+}
+
+static int print_size(DeviceState *dev, Property *prop, char *dest, size_t len)
+{
+    uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
+    char suffixes[] = {'T', 'G', 'M', 'K', 'B'};
+    int i = 0;
+    uint64_t div;
+
+    for (div = (long int)1 << 40; !(*ptr / div) ; div >>= 10) {
+        i++;
+    }
+    return snprintf(dest, len, "%0.03f%c", (double)*ptr/div, suffixes[i]);
+}
+
+PropertyInfo qdev_prop_size = {
+    .name  = "size",
+    .parse = parse_size,
+    .print = print_size,
+    .get = get_size,
+    .set = set_size,
+};

include/hw/qdev-properties.h

@@ -15,6 +15,7 @@ extern PropertyInfo qdev_prop_uint64;
 extern PropertyInfo qdev_prop_hex8;
 extern PropertyInfo qdev_prop_hex32;
 extern PropertyInfo qdev_prop_hex64;
+extern PropertyInfo qdev_prop_size;
 extern PropertyInfo qdev_prop_string;
 extern PropertyInfo qdev_prop_chr;
 extern PropertyInfo qdev_prop_ptr;
@@ -116,6 +117,8 @@ extern PropertyInfo qdev_prop_arraylen;
     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex32, uint32_t)
 #define DEFINE_PROP_HEX64(_n, _s, _f, _d)                       \
     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex64, uint64_t)
+#define DEFINE_PROP_SIZE(_n, _s, _f, _d)                       \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_size, uint64_t)
 #define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d)                   \
     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, int32_t)
 

include/qemu/option.h

@@ -73,6 +73,8 @@ QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest,
     QEMUOptionParameter *list);
 QEMUOptionParameter *parse_option_parameters(const char *param,
     QEMUOptionParameter *list, QEMUOptionParameter *dest);
+void parse_option_size(const char *name, const char *value,
+                       uint64_t *ret, Error **errp);
 void free_option_parameters(QEMUOptionParameter *list);
 void print_option_parameters(QEMUOptionParameter *list);
 void print_option_help(QEMUOptionParameter *list);

util/qemu-option.c

@@ -173,8 +173,8 @@ static void parse_option_number(const char *name, const char *value,
     }
 }
 
-static void parse_option_size(const char *name, const char *value,
-                              uint64_t *ret, Error **errp)
+void parse_option_size(const char *name, const char *value,
+                       uint64_t *ret, Error **errp)
 {
     char *postfix;
     double sizef;