[Qemu-devel] [PATCH 05/16] qdev: Add SIZE type to qdev properties

[Igor Mammedov <imammedo@redhat.com>]

From: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>

This patch adds a 'SIZE' type property to qdev.

It will make dimm description more convenient by allowing sizes to be specified
with K,M,G,T prefixes instead of number of bytes e.g.:
-device dimm,id=mem0,size=2G,bus=membus.0

Signed-off-by: Ian Molton <ian.molton@collabora.co.uk>
Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/core/qdev-properties.c    |   55 ++++++++++++++++++++++++++++++++++++++++++
 include/hw/qdev-properties.h |    3 ++
 include/qemu/option.h        |    2 +
 util/qemu-option.c           |    2 +-
 4 files changed, 61 insertions(+), 1 deletions(-)

diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 3a324fb..f427baf 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -1134,3 +1134,58 @@ 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,
+};
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index 39448b7..692f82e 100644
--- a/include/hw/qdev-properties.h
+++ b/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)
 
diff --git a/include/qemu/option.h b/include/qemu/option.h
index a83c700..479ae5f 100644
--- a/include/qemu/option.h
+++ b/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);
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 412c425..5f10ab5 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -173,7 +173,7 @@ static void parse_option_number(const char *name, const char *value,
     }
 }
 
-static void parse_option_size(const char *name, const char *value,
+void parse_option_size(const char *name, const char *value,
                               uint64_t *ret, Error **errp)
 {
     char *postfix;
-- 
1.7.1