ieee820154: add lbt setting support

This patch adds support for setting listen before transmit mode via
nl802154 framework.

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

2 files changed, 32 insertions, 0 deletions

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 0e272c67c49b..ccdf33ecee0b 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -691,6 +691,23 @@ nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info)
         return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries);
 }
 
+static int nl802154_set_lbt_mode(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;
+        bool mode;
+
+        if (netif_running(dev))
+                return -EBUSY;
+
+        if (!info->attrs[NL802154_ATTR_LBT_MODE])
+                return -EINVAL;
+
+        mode = !!nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
+        return rdev_set_lbt_mode(rdev, wpan_dev, mode);
+}
+
 #define NL802154_FLAG_NEED_WPAN_PHY     0x01
 #define NL802154_FLAG_NEED_NETDEV       0x02
 #define NL802154_FLAG_NEED_RTNL         0x04
@@ -849,6 +866,14 @@ static const struct genl_ops nl802154_ops[] = {
                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
                                   NL802154_FLAG_NEED_RTNL,
         },
+        {
+                .cmd = NL802154_CMD_SET_LBT_MODE,
+                .doit = nl802154_set_lbt_mode,
+                .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 f9171aaf985e..a78f700bc821 100644
--- a/net/ieee802154/rdev-ops.h
+++ b/net/ieee802154/rdev-ops.h
@@ -68,4 +68,11 @@ rdev_set_max_frame_retries(struct cfg802154_registered_device *rdev,
                                                 max_frame_retries);
 }
 
+static inline int
+rdev_set_lbt_mode(struct cfg802154_registered_device *rdev,
+                  struct wpan_dev *wpan_dev, const bool mode)
+{
+        return rdev->ops->set_lbt_mode(&rdev->wpan_phy, wpan_dev, mode);
+}
+
 #endif /* __CFG802154_RDEV_OPS */