From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 B550D408008 for ; Tue, 11 Aug 2026 17:24:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786469101; cv=none; b=KPNuVXn8aDdM8QtnUDtmGbiAZpHaSbK05UX6+M0b8di/WuT1MYuS412e39zYIhrn4STWa7WJxvD8gd9jq8dKpr9OtYsUw1waEdvNCyqpsGNnuJ87tFlrerFxJKRhWrhk4ovx/pukhWr+oWBkZ1ZXu1ThZYDMENIRimRlNAXc7KE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786469101; c=relaxed/simple; bh=indGZsctG0J7JENpI6bJLCCYCiFcLs/3cVSbDKdaH70=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=NdLyvllCRsIP/L9bSe7Nncrhrl6DTb6+F1DErvX9HVep6XTxuYOl/a05KUf3qRcHYKDKOlTZRqTS0YdT4qzAfuEe7qJbgO7D2reeldkRA5pemTlqi8FZOmhY3crUq9kHppwA5JQCX2K/khbApw+ev5gVpXcvdw4CVrDEdvwlM3k= 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=Srhbm/P9; arc=none smtp.client-ip=170.10.129.124 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="Srhbm/P9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1786469098; 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=IPlqeWxM+x2WItnybXha9BD+uNfcp/QU8sKnK1YwN7s=; b=Srhbm/P9BIfIy2t0zjYeYOltEERBOhEsl1EqehA5AGbat2gRWk/w1627tCOt3Sl9RSeUIw 7cY0xDMMXoI2rHL8WmjOpAkdSVI9HEYSbYKYa4enpGFm3DZ7cSmNyftYkXnlBZMP0wRdzr RQjlzS37GpWX3QgdF1O9dkHavvGh/2Y= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-489-q5Id0HgKPE2W7U1wNrFPkQ-1; Tue, 11 Aug 2026 13:24:45 -0400 X-MC-Unique: q5Id0HgKPE2W7U1wNrFPkQ-1 X-Mimecast-MFC-AGG-ID: q5Id0HgKPE2W7U1wNrFPkQ_1786469084 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-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 98E4B1800846; Tue, 11 Aug 2026 17:24:43 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.44.32.68]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 65638180049F; Tue, 11 Aug 2026 17:24:40 +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 v6 0/4] ath11k/ath12k: implement TX flow control Date: Tue, 11 Aug 2026 19:24:31 +0200 Message-ID: <20260811172435.616200-1-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, adapted for ath11k/ath12k hardware ring architecture, checking hardware ring space before dequeuing packets from mac80211. Testing shows stable operation with eliminated -ENOMEM errors, no hangs, and improved throughput under heavy traffic conditions. Note: I will have limited availability from mid-August to mid-September. I will address any review feedback before then or promptly after returning. Jose Ignacio Tornos Martinez (4): wifi: ath11k: use queue mapping for WCN6750 ring selection wifi: ath11k/ath12k: remove skb parameter from get_ring_selector wifi: ath11k: implement custom wake_tx_queue with flow control wifi: ath12k: implement custom wake_tx_queue with flow control v6: No modification in patches 1 and 2 Address comments from Jeff Johnson: Patch 3: Remove unnecessary if (!ar) check, add Tested-on tag Patch 4: Use EXPORT_SYMBOL instead of EXPORT_SYMBOL_GPL, use guard(spinlock_bh), add Tested-on tag v5: https://lore.kernel.org/all/20260807105843.20203-1-jtornosm@redhat.com/ -- 2.49.0