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authorMiquel Raynal <miquel.raynal@bootlin.com>2022-05-19 17:05:14 +0200
committerStefan Schmidt <stefan@datenfreihafen.org>2022-06-10 09:48:40 +0200
commitddd9ee7cda122ac55571b8b11b51ef1e71918b63 (patch)
tree8b5bacff08c74fdb6a066caa6c7a6bd826f967d6 /net/mac802154
parentnet: mac802154: Introduce a tx queue flushing mechanism (diff)
downloadlinux-ddd9ee7cda122ac55571b8b11b51ef1e71918b63.tar.xz
linux-ddd9ee7cda122ac55571b8b11b51ef1e71918b63.zip
net: mac802154: Introduce a synchronous API for MLME commands
This is the slow path, we need to wait for each command to be processed before continuing so let's introduce an helper which does the transmission and blocks until it gets notified of its asynchronous completion. This helper is going to be used when introducing scan support. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Alexander Aring <aahringo@redhat.com> Link: https://lore.kernel.org/r/20220519150516.443078-10-miquel.raynal@bootlin.com Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Diffstat (limited to 'net/mac802154')
-rw-r--r--net/mac802154/ieee802154_i.h4
-rw-r--r--net/mac802154/tx.c44
2 files changed, 48 insertions, 0 deletions
diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h
index a057827fc48a..8a4816ae71e7 100644
--- a/net/mac802154/ieee802154_i.h
+++ b/net/mac802154/ieee802154_i.h
@@ -125,6 +125,10 @@ extern struct ieee802154_mlme_ops mac802154_mlme_wpan;
void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb);
void ieee802154_xmit_sync_worker(struct work_struct *work);
int ieee802154_sync_and_hold_queue(struct ieee802154_local *local);
+int ieee802154_mlme_op_pre(struct ieee802154_local *local);
+int ieee802154_mlme_tx(struct ieee802154_local *local, struct sk_buff *skb);
+void ieee802154_mlme_op_post(struct ieee802154_local *local);
+int ieee802154_mlme_tx_one(struct ieee802154_local *local, struct sk_buff *skb);
netdev_tx_t
ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
netdev_tx_t
diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
index 38f74b8b6740..4827391600f6 100644
--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -128,6 +128,50 @@ int ieee802154_sync_and_hold_queue(struct ieee802154_local *local)
return ieee802154_sync_queue(local);
}
+int ieee802154_mlme_op_pre(struct ieee802154_local *local)
+{
+ return ieee802154_sync_and_hold_queue(local);
+}
+
+int ieee802154_mlme_tx(struct ieee802154_local *local, struct sk_buff *skb)
+{
+ int ret;
+
+ /* Avoid possible calls to ->ndo_stop() when we asynchronously perform
+ * MLME transmissions.
+ */
+ rtnl_lock();
+
+ /* Ensure the device was not stopped, otherwise error out */
+ if (!local->open_count) {
+ rtnl_unlock();
+ return -ENETDOWN;
+ }
+
+ ieee802154_tx(local, skb);
+ ret = ieee802154_sync_queue(local);
+
+ rtnl_unlock();
+
+ return ret;
+}
+
+void ieee802154_mlme_op_post(struct ieee802154_local *local)
+{
+ ieee802154_release_queue(local);
+}
+
+int ieee802154_mlme_tx_one(struct ieee802154_local *local, struct sk_buff *skb)
+{
+ int ret;
+
+ ieee802154_mlme_op_pre(local);
+ ret = ieee802154_mlme_tx(local, skb);
+ ieee802154_mlme_op_post(local);
+
+ return ret;
+}
+
static netdev_tx_t
ieee802154_hot_tx(struct ieee802154_local *local, struct sk_buff *skb)
{