From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 51DD5433BD3 for ; Fri, 10 Jul 2026 15:55:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783698901; cv=none; b=oYI3uZ0tP2sm3UHBF+G4H8QmONYij7TS9n67hIq/9T4wqh4T6zbGRifEkZgWx75y9xNXrLTrmB9hnFrihYGPQ2eVV04HLAxXbr7FfyyahMjTXJmmWCBM2DcBYhzZ30CYZoQCxBFqNBMlWBKFcY167gPtjf/fYZ+czbsUV6UNSq4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783698901; c=relaxed/simple; bh=PT2IfD69KHWtSfNcq3axdvI9lUVielXn1p9BUxgRi2U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ngicy75Wzy0gHexuagt3+GOuWGM0M8YcBS9BCOYSRyxUp4ayEJi3FSVsmX2E22IjDBMJr2bjZM6mgJcH39ve9rDDAJNqqGn+52aZiyouPydADqXO09MnLdpg6GXMBOFknTABV3vrXsYQ0ZbyAVSB6Mdo40NGJLIaZth2v2Fmc98= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=SifIeiC7; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="SifIeiC7" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1783698899; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=bjiyv0lirhfy7+vrSMfYOoDKtgGzU0tRvcCRuYupkas=; b=SifIeiC7Uh+9wQnTy1hGtj4xZ9pQLjb5XBDmQOudQTKs7p4kVRsEnuwXj0YymV2Msbl7P6 dEsvyw5N0ss8TQDs7UF67xrAp7s/v8MDNXSEBKI6RDl6sEtlMGNu4KmlRg/6q9wJng472J yoF5b2bz2EgJQOLbvCkO3r9NH/35FD4= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-642-HavAsTw3O3uLypCFXCWu5Q-1; Fri, 10 Jul 2026 11:54:56 -0400 X-MC-Unique: HavAsTw3O3uLypCFXCWu5Q-1 X-Mimecast-MFC-AGG-ID: HavAsTw3O3uLypCFXCWu5Q_1783698895 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4308E1955EBC; Fri, 10 Jul 2026 15:54:54 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.44.48.25]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id BE9591800480; Fri, 10 Jul 2026 15:54:51 +0000 (UTC) From: Jose Ignacio Tornos Martinez To: jjohnson@kernel.org Cc: ath11k@lists.infradead.org, ath12k@lists.infradead.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Jose Ignacio Tornos Martinez Subject: [PATCH 0/2] ath11k/ath12k: implement TX flow control Date: Fri, 10 Jul 2026 17:54:41 +0200 Message-ID: <20260710155443.1761760-1-jtornosm@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 This series implements custom wake_tx_queue operations for ath11k and ath12k drivers to prevent hardware ring overflow issues under heavy traffic. Without proper flow control, both drivers experience -ENOMEM errors ("failed to transmit frame -12") when the hardware TCL ring fills up. Additionally, ath12k can hang under sustained high throughput. These issues are more commonly observed in VMs with PCIe passthrough but also occur on bare metal systems. The implementation follows the pattern used in the iwlwifi driver, checking hardware ring space before dequeuing packets from mac80211. Per-packet locking serializes ring access while allowing TX completions to run, preventing deadlocks. Testing shows stable operation with eliminated -ENOMEM errors, no hangs, and improved throughput under heavy traffic conditions. Jose Ignacio Tornos Martinez (2): wifi: ath11k: implement custom wake_tx_queue with flow control wifi: ath12k: implement custom wake_tx_queue with flow control drivers/net/wireless/ath/ath11k/dp.c | 1 + drivers/net/wireless/ath/ath11k/dp.h | 2 + drivers/net/wireless/ath/ath11k/mac.c | 49 ++++++++++++++++++++- drivers/net/wireless/ath/ath12k/dp.c | 1 + drivers/net/wireless/ath/ath12k/dp.h | 2 + drivers/net/wireless/ath/ath12k/hal.c | 1 + drivers/net/wireless/ath/ath12k/wifi7/hw.c | 50 +++++++++++++++++++++- 7 files changed, 104 insertions(+), 2 deletions(-) -- 2.54.0