diff mbox series

[v3,2/5] qdev-properties: Add DEFINE_PROP_ON_OFF_AUTO_BIT64()

Message ID 20240714-auto-v3-2-e27401aabab3@daynix.com (mailing list archive)
State New, archived
Headers show
Series virtio-net: Convert feature properties to OnOffAuto | expand

Commit Message

Akihiko Odaki July 14, 2024, 5:11 a.m. UTC 
DEFINE_PROP_ON_OFF_AUTO_BIT64() corresponds to DEFINE_PROP_ON_OFF_AUTO()
as DEFINE_PROP_BIT64() corresponds to DEFINE_PROP_BOOL(). The difference
is that DEFINE_PROP_ON_OFF_AUTO_BIT64() exposes OnOffAuto instead of
bool.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 include/hw/qdev-properties.h | 18 ++++++++++++
 hw/core/qdev-properties.c    | 66 +++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 83 insertions(+), 1 deletion(-)

Comments

Daniel P. Berrangé July 15, 2024, 11:47 a.m. UTC | #1 
On Sun, Jul 14, 2024 at 02:11:02PM +0900, Akihiko Odaki wrote:
> DEFINE_PROP_ON_OFF_AUTO_BIT64() corresponds to DEFINE_PROP_ON_OFF_AUTO()
> as DEFINE_PROP_BIT64() corresponds to DEFINE_PROP_BOOL(). The difference
> is that DEFINE_PROP_ON_OFF_AUTO_BIT64() exposes OnOffAuto instead of
> bool.

IMHO this shouldn't be implemented in terms of On/Off auto,
as it is misleadingly accepting much more than PROP_ON_OFF
accepts. Rather it should be just DEFINE_PROP_AUTO_BIT64,
implemented in terms of 'bool', with an extra 'auto' value.


With regards,
Daniel
Akihiko Odaki July 16, 2024, 6:23 a.m. UTC | #2 
On 2024/07/15 20:47, Daniel P. Berrangé wrote:
> On Sun, Jul 14, 2024 at 02:11:02PM +0900, Akihiko Odaki wrote:
>> DEFINE_PROP_ON_OFF_AUTO_BIT64() corresponds to DEFINE_PROP_ON_OFF_AUTO()
>> as DEFINE_PROP_BIT64() corresponds to DEFINE_PROP_BOOL(). The difference
>> is that DEFINE_PROP_ON_OFF_AUTO_BIT64() exposes OnOffAuto instead of
>> bool.
> 
> IMHO this shouldn't be implemented in terms of On/Off auto,
> as it is misleadingly accepting much more than PROP_ON_OFF
> accepts. Rather it should be just DEFINE_PROP_AUTO_BIT64,
> implemented in terms of 'bool', with an extra 'auto' value.

I defined it in a way consistent with DEFINE_PROP_ON_OFF_AUTO(). A union 
of 'bool' and 'auto' would have a behavior somewhat inconsistent with 
DEFINE_PROP_ON_OFF_AUTO().

Regards,
Akihiko Odaki
diff mbox series

Patch

diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index 09aa04ca1e27..afec53a48470 100644
--- a/include/hw/qdev-properties.h
+++ b/include/hw/qdev-properties.h
@@ -43,11 +43,22 @@  struct PropertyInfo {
     ObjectPropertyRelease *release;
 };
 
+/**
+ * struct OnOffAutoBit64 - OnOffAuto storage with 64 elements.
+ * @on_bits: Bitmap of elements with "on".
+ * @auto_bits: Bitmap of elements with "auto".
+ */
+typedef struct OnOffAutoBit64 {
+    uint64_t on_bits;
+    uint64_t auto_bits;
+} OnOffAutoBit64;
+
 
 /*** qdev-properties.c ***/
 
 extern const PropertyInfo qdev_prop_bit;
 extern const PropertyInfo qdev_prop_bit64;
+extern const PropertyInfo qdev_prop_on_off_auto_bit64;
 extern const PropertyInfo qdev_prop_bool;
 extern const PropertyInfo qdev_prop_enum;
 extern const PropertyInfo qdev_prop_uint8;
@@ -100,6 +111,13 @@  extern const PropertyInfo qdev_prop_link;
                 .set_default = true,                              \
                 .defval.u  = (bool)_defval)
 
+#define DEFINE_PROP_ON_OFF_AUTO_BIT64(_name, _state, _field, _bit, _defval) \
+    DEFINE_PROP(_name, _state, _field, qdev_prop_on_off_auto_bit64,         \
+                OnOffAutoBit64,                                             \
+                .bitnr    = (_bit),                                         \
+                .set_default = true,                                        \
+                .defval.i = (OnOffAuto)_defval)
+
 #define DEFINE_PROP_BOOL(_name, _state, _field, _defval)     \
     DEFINE_PROP(_name, _state, _field, qdev_prop_bool, bool, \
                 .set_default = true,                         \
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index f0a270bb4f61..cc76ff0dfae6 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -187,7 +187,8 @@  const PropertyInfo qdev_prop_bit = {
 
 static uint64_t qdev_get_prop_mask64(Property *prop)
 {
-    assert(prop->info == &qdev_prop_bit64);
+    assert(prop->info == &qdev_prop_bit64 ||
+           prop->info == &qdev_prop_on_off_auto_bit64);
     return 0x1ull << prop->bitnr;
 }
 
@@ -232,6 +233,69 @@  const PropertyInfo qdev_prop_bit64 = {
     .set_default_value = set_default_value_bool,
 };
 
+static void prop_get_on_off_auto_bit64(Object *obj, Visitor *v,
+                                       const char *name, void *opaque,
+                                       Error **errp)
+{
+    Property *prop = opaque;
+    OnOffAutoBit64 *p = object_field_prop_ptr(obj, prop);
+    int value;
+    uint64_t mask = qdev_get_prop_mask64(prop);
+
+    if (p->auto_bits & mask) {
+        value = ON_OFF_AUTO_AUTO;
+    } else if (p->on_bits & mask) {
+        value = ON_OFF_AUTO_ON;
+    } else {
+        value = ON_OFF_AUTO_OFF;
+    }
+
+    visit_type_enum(v, name, &value, &OnOffAuto_lookup, errp);
+}
+
+static void prop_set_on_off_auto_bit64(Object *obj, Visitor *v,
+                                       const char *name, void *opaque,
+                                       Error **errp)
+{
+    Property *prop = opaque;
+    OnOffAutoBit64 *p = object_field_prop_ptr(obj, prop);
+    bool bool_value;
+    int value;
+    uint64_t mask = qdev_get_prop_mask64(prop);
+
+    if (visit_type_bool(v, name, &bool_value, NULL)) {
+        value = bool_value ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
+    } else if (!visit_type_enum(v, name, &value, &OnOffAuto_lookup, errp)) {
+        return;
+    }
+
+    switch (value) {
+    case ON_OFF_AUTO_AUTO:
+        p->on_bits &= ~mask;
+        p->auto_bits |= mask;
+        break;
+
+    case ON_OFF_AUTO_ON:
+        p->on_bits |= mask;
+        p->auto_bits &= ~mask;
+        break;
+
+    case ON_OFF_AUTO_OFF:
+        p->on_bits &= ~mask;
+        p->auto_bits &= ~mask;
+        break;
+    }
+}
+
+const PropertyInfo qdev_prop_on_off_auto_bit64 = {
+    .name  = "OnOffAuto",
+    .description = "on/off/auto",
+    .enum_table = &OnOffAuto_lookup,
+    .get = prop_get_on_off_auto_bit64,
+    .set = prop_set_on_off_auto_bit64,
+    .set_default_value = qdev_propinfo_set_default_value_enum,
+};
+
 /* --- bool --- */
 
 static void get_bool(Object *obj, Visitor *v, const char *name, void *opaque,