qdev-properties: make blocksize accept size suffixes

It appears convenient to be able to specify physical_block_size and
logical_block_size using common size suffixes.

Teach the blocksize property setter to interpret them.  Also express the
upper and lower limits in the respective units.

Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200528225516.1676602-6-rvkagan@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

hw/core/qdev-properties.c

@@ -14,6 +14,7 @@
 #include "qapi/visitor.h"
 #include "chardev/char.h"
 #include "qemu/uuid.h"
+#include "qemu/units.h"
 
 void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
                                   Error **errp)
@@ -771,33 +772,34 @@ const PropertyInfo qdev_prop_size32 = {
 
 /* lower limit is sector size */
 #define MIN_BLOCK_SIZE          512
-#define MIN_BLOCK_SIZE_STR      stringify(MIN_BLOCK_SIZE)
+#define MIN_BLOCK_SIZE_STR      "512 B"
 /* upper limit is the max power of 2 that fits in uint16_t */
-#define MAX_BLOCK_SIZE          32768
-#define MAX_BLOCK_SIZE_STR      stringify(MAX_BLOCK_SIZE)
+#define MAX_BLOCK_SIZE          (32 * KiB)
+#define MAX_BLOCK_SIZE_STR      "32 KiB"
 
 static void set_blocksize(Object *obj, Visitor *v, const char *name,
                           void *opaque, Error **errp)
 {
     DeviceState *dev = DEVICE(obj);
     Property *prop = opaque;
-    uint16_t value, *ptr = qdev_get_prop_ptr(dev, prop);
+    uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
+    uint64_t value;
     Error *local_err = NULL;
 
     if (dev->realized) {
         qdev_prop_set_after_realize(dev, name, errp);
         return;
     }
 
-    visit_type_uint16(v, name, &value, &local_err);
+    visit_type_size(v, name, &value, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
     }
     /* value of 0 means "unset" */
     if (value && (value < MIN_BLOCK_SIZE || value > MAX_BLOCK_SIZE)) {
         error_setg(errp,
-                   "Property %s.%s doesn't take value %" PRIu16
+                   "Property %s.%s doesn't take value %" PRIu64
                    " (minimum: " MIN_BLOCK_SIZE_STR
                    ", maximum: " MAX_BLOCK_SIZE_STR ")",
                    dev->id ? : "", name, value);
@@ -816,7 +818,7 @@ static void set_blocksize(Object *obj, Visitor *v, const char *name,
 }
 
 const PropertyInfo qdev_prop_blocksize = {
-    .name  = "uint16",
+    .name  = "size",
     .description = "A power of two between " MIN_BLOCK_SIZE_STR
                    " and " MAX_BLOCK_SIZE_STR,
     .get   = get_uint16,