ieee820154: add channel set support

This patch adds page and channel setting support to nl802154 framework.

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

4 files changed, 60 insertions, 0 deletions

diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index 8a3edc5edad1..391fdb37208d 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -37,6 +37,7 @@ struct cfg802154_ops {
                                                            int type);
         void    (*del_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
                                                struct net_device *dev);
+        int     (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
 };
 
 struct wpan_phy {
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 46df7dca92d9..d8ef2c8a182f 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -23,6 +23,7 @@
 #include <net/sock.h>
 
 #include "nl802154.h"
+#include "rdev-ops.h"
 #include "core.h"
 
 static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
@@ -550,6 +551,25 @@ static int nl802154_get_interface(struct sk_buff *skb, struct genl_info *info)
         return genlmsg_reply(msg, info);
 }
 
+static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
+{
+        struct cfg802154_registered_device *rdev = info->user_ptr[0];
+        u8 channel, page;
+
+        if (!info->attrs[NL802154_ATTR_PAGE] ||
+            !info->attrs[NL802154_ATTR_CHANNEL])
+                return -EINVAL;
+
+        page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
+        channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
+
+        /* check 802.15.4 constraints */
+        if (page >= WPAN_NUM_PAGES || channel >= WPAN_NUM_CHANNELS)
+                return -EINVAL;
+
+        return rdev_set_channel(rdev, page, channel);
+}
+
 #define NL802154_FLAG_NEED_WPAN_PHY     0x01
 #define NL802154_FLAG_NEED_NETDEV       0x02
 #define NL802154_FLAG_NEED_RTNL         0x04
@@ -660,6 +680,14 @@ static const struct genl_ops nl802154_ops[] = {
                 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
                                   NL802154_FLAG_NEED_RTNL,
         },
+        {
+                .cmd = NL802154_CMD_SET_CHANNEL,
+                .doit = nl802154_set_channel,
+                .policy = nl802154_policy,
+                .flags = GENL_ADMIN_PERM,
+                .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
+                                  NL802154_FLAG_NEED_RTNL,
+        },
 };
 
 /* initialisation/exit functions */
diff --git a/net/ieee802154/rdev-ops.h b/net/ieee802154/rdev-ops.h
index ac8824ec168c..8a3b0eb4e026 100644
--- a/net/ieee802154/rdev-ops.h
+++ b/net/ieee802154/rdev-ops.h
@@ -20,4 +20,11 @@ rdev_del_virtual_intf_deprecated(struct cfg802154_registered_device *rdev,
         rdev->ops->del_virtual_intf_deprecated(&rdev->wpan_phy, dev);
 }
 
+static inline int
+rdev_set_channel(struct cfg802154_registered_device *rdev, const u8 page,
+                 const u8 channel)
+{
+        return rdev->ops->set_channel(&rdev->wpan_phy, page, channel);
+}
+
 #endif /* __CFG802154_RDEV_OPS */
diff --git a/net/mac802154/cfg.c b/net/mac802154/cfg.c
index d2c4e8f89720..9d5b1895c752 100644
--- a/net/mac802154/cfg.c
+++ b/net/mac802154/cfg.c
@@ -17,6 +17,7 @@
 #include <net/cfg802154.h>
 
 #include "ieee802154_i.h"
+#include "driver-ops.h"
 #include "cfg.h"
 
 static struct net_device *
@@ -41,7 +42,30 @@ static void ieee802154_del_iface_deprecated(struct wpan_phy *wpan_phy,
         ieee802154_if_remove(sdata);
 }
 
+static int
+ieee802154_set_channel(struct wpan_phy *wpan_phy, const u8 page,
+                       const u8 channel)
+{
+        struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
+        int ret;
+
+        ASSERT_RTNL();
+
+        /* check if phy support this setting */
+        if (!(wpan_phy->channels_supported[page] & BIT(channel)))
+                return -EINVAL;
+
+        ret = drv_set_channel(local, page, channel);
+        if (!ret) {
+                wpan_phy->current_page = page;
+                wpan_phy->current_channel = channel;
+        }
+
+        return ret;
+}
+
 const struct cfg802154_ops mac802154_config_ops = {
         .add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
         .del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
+        .set_channel = ieee802154_set_channel,
 };