ieee820154: add max frame retries setting support

This patch add support for setting mac frame retries setting via
nl802154 framework.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index 79b9ae0..5c3bc12 100644 (file)
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -48,6 +48,9 @@ struct cfg802154_ops {
        int     (*set_max_csma_backoffs)(struct wpan_phy *wpan_phy,
                                         struct wpan_dev *wpan_dev,
                                         u8 max_csma_backoffs);
+       int     (*set_max_frame_retries)(struct wpan_phy *wpan_phy,
+                                        struct wpan_dev *wpan_dev,
+                                        s8 max_frame_retries);
 };
 
 struct wpan_phy {

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index af38355..0e272c6 100644 (file)
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -667,6 +667,30 @@ nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)
        return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);
 }
 
+static int
+nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info)
+{
+       struct cfg802154_registered_device *rdev = info->user_ptr[0];
+       struct net_device *dev = info->user_ptr[1];
+       struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
+       s8 max_frame_retries;
+
+       if (netif_running(dev))
+               return -EBUSY;
+
+       if (!info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES])
+               return -EINVAL;
+
+       max_frame_retries = nla_get_s8(
+                       info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]);
+
+       /* check 802.15.4 constraints */
+       if (max_frame_retries < -1 || max_frame_retries > 7)
+               return -EINVAL;
+
+       return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries);
+}
+
 #define NL802154_FLAG_NEED_WPAN_PHY    0x01
 #define NL802154_FLAG_NEED_NETDEV      0x02
 #define NL802154_FLAG_NEED_RTNL                0x04
@@ -817,6 +841,14 @@ static const struct genl_ops nl802154_ops[] = {
                .internal_flags = NL802154_FLAG_NEED_NETDEV |
                                  NL802154_FLAG_NEED_RTNL,
        },
+       {
+               .cmd = NL802154_CMD_SET_MAX_FRAME_RETRIES,
+               .doit = nl802154_set_max_frame_retries,
+               .policy = nl802154_policy,
+               .flags = GENL_ADMIN_PERM,
+               .internal_flags = NL802154_FLAG_NEED_NETDEV |
+                                 NL802154_FLAG_NEED_RTNL,
+       },
 };
 
 /* initialisation/exit functions */

diff --git a/net/ieee802154/rdev-ops.h b/net/ieee802154/rdev-ops.h
index 263095c..f9171aa 100644 (file)
--- a/net/ieee802154/rdev-ops.h
+++ b/net/ieee802154/rdev-ops.h
@@ -59,4 +59,13 @@ rdev_set_max_csma_backoffs(struct cfg802154_registered_device *rdev,
                                                max_csma_backoffs);
 }
 
+static inline int
+rdev_set_max_frame_retries(struct cfg802154_registered_device *rdev,
+                          struct wpan_dev *wpan_dev,
+                          const s8 max_frame_retries)
+{
+       return rdev->ops->set_max_frame_retries(&rdev->wpan_phy, wpan_dev,
+                                               max_frame_retries);
+}
+
 #endif /* __CFG802154_RDEV_OPS */

diff --git a/net/mac802154/cfg.c b/net/mac802154/cfg.c
index d72feeb..a8f6eaa 100644 (file)
--- a/net/mac802154/cfg.c
+++ b/net/mac802154/cfg.c
@@ -140,6 +140,21 @@ static int ieee802154_set_max_csma_backoffs(struct wpan_phy *wpan_phy,
        return 0;
 }
 
+static int ieee802154_set_max_frame_retries(struct wpan_phy *wpan_phy,
+                                           struct wpan_dev *wpan_dev,
+                                           const s8 max_frame_retries)
+{
+       struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
+
+       ASSERT_RTNL();
+
+       if (!(local->hw.flags & IEEE802154_HW_FRAME_RETRIES))
+               return -EOPNOTSUPP;
+
+       wpan_dev->frame_retries = max_frame_retries;
+       return 0;
+}
+
 const struct cfg802154_ops mac802154_config_ops = {
        .add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
        .del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
@@ -148,4 +163,5 @@ const struct cfg802154_ops mac802154_config_ops = {
        .set_short_addr = ieee802154_set_short_addr,
        .set_backoff_exponent = ieee802154_set_backoff_exponent,
        .set_max_csma_backoffs = ieee802154_set_max_csma_backoffs,
+       .set_max_frame_retries = ieee802154_set_max_frame_retries,
 };