From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Alexander Aring <alex.aring@gmail.com>,
Stefan Schmidt <stefan@datenfreihafen.org>,
linux-wpan@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, David Girault <david.girault@qorvo.com>,
Romuald Despres <romuald.despres@qorvo.com>,
Frederic Blain <frederic.blain@qorvo.com>,
Nicolas Schodet <nico@ni.fr.eu.org>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: [PATCH wpan-next 05/11] net: mac802154: Follow the count of ongoing transmissions
Date: Wed, 27 Apr 2022 18:46:53 +0200 [thread overview]
Message-ID: <20220427164659.106447-6-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <20220427164659.106447-1-miquel.raynal@bootlin.com>
In order to create a synchronous API for MLME command purposes, we need
to be able to track the end of the ongoing transmissions. Let's
introduce an atomic variable which is incremented when a transmission
starts and decremented when relevant so that we know at any moment
whether there is an ongoing transmission.
The counter gets decremented in the following situations:
- The operation is asynchronous and there was a failure during the
offloading process.
- The operation is synchronous and the synchronous operation failed.
- The operation finished, either successfully or not.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
include/net/cfg802154.h | 3 +++
net/mac802154/tx.c | 3 +++
net/mac802154/util.c | 2 ++
3 files changed, 8 insertions(+)
diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index 85f9e8417688..473ebcb9b155 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -214,6 +214,9 @@ struct wpan_phy {
/* the network namespace this phy lives in currently */
possible_net_t _net;
+ /* Transmission monitoring */
+ atomic_t ongoing_txs;
+
char priv[] __aligned(NETDEV_ALIGN);
};
diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
index 6d559f96664d..8c0bad7796ba 100644
--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -45,6 +45,7 @@ void ieee802154_xmit_sync_worker(struct work_struct *work)
/* Restart the netif queue on each sub_if_data object. */
ieee802154_wake_queue(local);
kfree_skb(skb);
+ atomic_dec(&local->phy->ongoing_txs);
netdev_dbg(dev, "transmission failed\n");
}
@@ -75,6 +76,7 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
/* Stop the netif queue on each sub_if_data object. */
ieee802154_stop_queue(local);
+ atomic_inc(&local->phy->ongoing_txs);
/* Drivers should preferably implement the async callback. In some rare
* cases they only provide a sync callback which we will use as a
@@ -99,6 +101,7 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
return NETDEV_TX_OK;
err_tx:
+ atomic_dec(&local->phy->ongoing_txs);
kfree_skb(skb);
return NETDEV_TX_OK;
}
diff --git a/net/mac802154/util.c b/net/mac802154/util.c
index 6ded390f0132..4bcc9cd2eb9d 100644
--- a/net/mac802154/util.c
+++ b/net/mac802154/util.c
@@ -84,6 +84,7 @@ void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
}
dev_consume_skb_any(skb);
+ atomic_dec(&hw->phy->ongoing_txs);
}
EXPORT_SYMBOL(ieee802154_xmit_complete);
@@ -95,6 +96,7 @@ void ieee802154_xmit_error(struct ieee802154_hw *hw, struct sk_buff *skb,
local->tx_result = reason;
ieee802154_wake_queue(local);
dev_kfree_skb_any(skb);
+ atomic_dec(&hw->phy->ongoing_txs);
}
EXPORT_SYMBOL(ieee802154_xmit_error);
--
2.27.0
next prev parent reply other threads:[~2022-04-27 16:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-27 16:46 [PATCH wpan-next 00/11] ieee802154: Synchronous Tx support Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 01/11] net: mac802154: Stop exporting ieee802154_wake/stop_queue() Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 02/11] net: mac802154: Change the wake/stop queue prototypes Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 03/11] net: mac802154: Rename the synchronous xmit worker Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 04/11] net: mac802154: Rename the main tx_work struct Miquel Raynal
2022-04-27 16:46 ` Miquel Raynal [this message]
2022-04-27 16:46 ` [PATCH wpan-next 06/11] net: mac802154: Hold the transmit queue when relevant Miquel Raynal
2022-05-04 0:51 ` Alexander Aring
2022-05-10 14:52 ` Miquel Raynal
2022-05-11 13:09 ` Alexander Aring
2022-05-12 14:33 ` Miquel Raynal
2022-05-12 14:44 ` Alexander Aring
2022-05-17 9:13 ` Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 07/11] net: mac802154: Create a hot tx path Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 08/11] net: mac802154: Add a warning in the hot path Miquel Raynal
2022-04-27 18:01 ` Alexander Aring
2022-04-28 7:58 ` Miquel Raynal
2022-05-02 0:21 ` Alexander Aring
2022-05-12 14:33 ` Miquel Raynal
2022-05-13 14:26 ` Alexander Aring
2022-04-27 16:46 ` [PATCH wpan-next 09/11] net: mac802154: Introduce a helper to disable the queue Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 10/11] net: mac802154: Introduce a tx queue flushing mechanism Miquel Raynal
2022-05-04 0:40 ` Alexander Aring
2022-05-10 8:57 ` Miquel Raynal
2022-04-27 16:46 ` [PATCH wpan-next 11/11] net: mac802154: Introduce a synchronous API for MLME commands Miquel Raynal
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