From patchwork Tue May 17 16:34:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12852771 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1C27C4321E for ; Tue, 17 May 2022 16:35:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350912AbiEQQfQ (ORCPT ); Tue, 17 May 2022 12:35:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350974AbiEQQfO (ORCPT ); Tue, 17 May 2022 12:35:14 -0400 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::228]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 790E24EF57; Tue, 17 May 2022 09:35:10 -0700 (PDT) Received: (Authenticated sender: miquel.raynal@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 7EFEC1BF204; Tue, 17 May 2022 16:35:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1652805308; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/MUFRMAsW2241garxrsNenEzkNuBlcfkuTUgxw5nPyo=; b=IagMdZYjigScKX08ADUkGUlRLhvLLc+HiwFn3sZz37N9eghYaFaWpYspkEbDXbUDn9b0xe GXeVeQ2vgIY5r+RltUAGIHL+V7LkF2vW8UUVpNBBFHOtozTPNkDOmsajHY75m1ZPrJQXZM 4WSz0l9s7UK5QW4i/2PfLT6CX2zWbVNiH/FlMUMWzrQTt6HIimwzOkdlidHLKRukI1LyPa L+RN4gF14hIJcerQfb8pwhqxtbDk1tQEoqa7Ww3ZQlz858ERLjrNlbe89XMUJu4Y5GRj+w kmMPKSVDqfYZ5bY6IndfBfWtQc+4umF4SbdoHqpW8aEfWyMQnLQR/XFybpeBNA== From: Miquel Raynal To: Alexander Aring , Stefan Schmidt , linux-wpan@vger.kernel.org Cc: David Girault , Romuald Despres , Frederic Blain , Nicolas Schodet , Thomas Petazzoni , "David S. Miller" , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, Miquel Raynal Subject: [PATCH wpan-next v3 09/11] net: mac802154: Introduce a synchronous API for MLME commands Date: Tue, 17 May 2022 18:34:48 +0200 Message-Id: <20220517163450.240299-10-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220517163450.240299-1-miquel.raynal@bootlin.com> References: <20220517163450.240299-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org 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 --- net/mac802154/ieee802154_i.h | 1 + net/mac802154/tx.c | 46 ++++++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h index a057827fc48a..b42c6ac789f5 100644 --- a/net/mac802154/ieee802154_i.h +++ b/net/mac802154/ieee802154_i.h @@ -125,6 +125,7 @@ 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_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..6cc4e5c7ba94 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -128,6 +128,52 @@ int ieee802154_sync_and_hold_queue(struct ieee802154_local *local) return ieee802154_sync_queue(local); } +static int ieee802154_mlme_op_pre(struct ieee802154_local *local) +{ + return ieee802154_sync_and_hold_queue(local); +} + +static 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) + return -EBUSY; + + ieee802154_tx(local, skb); + ret = ieee802154_sync_queue(local); + + rtnl_unlock(); + + return ret; +} + +static 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; + + ret = ieee802154_mlme_op_pre(local); + if (ret) + return ret; + + 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) {