From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D955EC43458 for ; Fri, 10 Jul 2026 15:55:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:content-type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=bjiyv0lirhfy7+vrSMfYOoDKtgGzU0tRvcCRuYupkas=; b=m4f1WFFUcj7p0v4B8wcBdtrsQW ksH01MIY1HXCd2RNReSJDeSr4VNz3RQXdB5tjyvq/SgWBMM4KfRrSETW8PLLoAB38iGPN2sRfhnsc aakPcfwbKrkAx7rIK2uvCk7LeB+okejlNOftQGdvFkxSJeRX0S0y/KMtOc+y7uL8baUZco7pEyzlw Yt94Xqz+hxX7mVhCl0dmgObS/+1CSIQQPp/TyQPr+CYuR9d0+ypdf7swE3W8m+/bEPkSHa9C4Y+Ry 9YH3/Nlt+HcMFAGd3w1EiKFuP12uhfUT54Kvrdg5lt/OjtuRbeIAe6CG2Cwd2sQFCDVJt9U9UXjtt O5jwV0fA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wiDZC-00000005Dkk-0p0r; Fri, 10 Jul 2026 15:55:06 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wiDZ9-00000005Djm-2Hy5 for ath11k@lists.infradead.org; Fri, 10 Jul 2026 15:55:05 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1783698901; 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; bh=bjiyv0lirhfy7+vrSMfYOoDKtgGzU0tRvcCRuYupkas=; b=E/UO9NE/ops/MLs6DYQs+SdQnP2BJOzqwO+mNFlLIsFnPSvS0r+37WHza7760/kZpnPZyE tr8HGk2miha4VfJ0uVtDPN/B7y9UI85e6Uv4Ic/9kLLnH0dPpMeu4JlFNBzN9jJD9/uhkJ FuUty3yDRC0KsAW+l/xJmhe87jSe3Js= 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> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Mimecast-MFC-PROC-ID: rRY7TOMpw1U0XsPov1IyFyJ4xpQLS0v_D4VP2HSj14Q_1783698895 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260710_085503_654071_DB9226FA X-CRM114-Status: UNSURE ( 7.48 ) X-CRM114-Notice: Please train this message. X-BeenThere: ath11k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "ath11k" Errors-To: ath11k-bounces+ath11k=archiver.kernel.org@lists.infradead.org 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