From patchwork Mon Aug 16 05:21:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Balakrishna Godavarthi X-Patchwork-Id: 497710 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A083C4338F for ; Mon, 16 Aug 2021 05:21:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 672ED619EA for ; Mon, 16 Aug 2021 05:21:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232381AbhHPFW2 (ORCPT ); Mon, 16 Aug 2021 01:22:28 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:47818 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229523AbhHPFW2 (ORCPT ); Mon, 16 Aug 2021 01:22:28 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1629091317; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=B4Kwshb6u/Zp9MjX8i6MMjsGcCKj7AX0jXcmoUSpJSk=; b=D1sDpFrjeHgCP4aD4iLXAGM+pI79LL9bPJ+eIL8s4ztgnOKi3RxQwsR8C2acUHxaK5cJJDA9 BrwPnnwCMQf1FfQI7plsLr0og5j/Aa9q6Fsh2BEpj2H6l8vFN4MEkIWjPae7NLEjKZpIEQPm C+SQxPuRvxtlm0My8lDbts7/ou0= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n02.prod.us-west-2.postgun.com with SMTP id 6119f5f4b14e7e2ecbb5a6e1 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 16 Aug 2021 05:21:56 GMT Sender: bgodavar=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 74651C4360C; Mon, 16 Aug 2021 05:21:56 +0000 (UTC) Received: from bgodavar-linux.qualcomm.com (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bgodavar) by smtp.codeaurora.org (Postfix) with ESMTPSA id 3EC5AC4338F; Mon, 16 Aug 2021 05:21:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org 3EC5AC4338F Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org From: Balakrishna Godavarthi To: marcel@holtmann.org, johan.hedberg@gmail.com Cc: mka@chromium.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, hemantg@codeaurora.org, linux-arm-msm@vger.kernel.org, pharish@codeaurora.org, rjliao@codeaurora.org, hbandi@codeaurora.org, abhishekpandit@chromium.org, mcchou@chromium.org, Balakrishna Godavarthi Subject: [PATCH] Bluetooth: hci_qca: Set SSR triggered flags when SSR command is sent out Date: Mon, 16 Aug 2021 10:51:42 +0530 Message-Id: <1629091302-7893-1-git-send-email-bgodavar@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This change sets SSR triggered flags when QCA SSR command is sent to SoC. After the SSR command sent, driver discards the incoming data from the upper layers. This way will ensure to read full dumps from the BT SoC without any flow control issues due to excess of data receiving from the HOST in audio usecases. Signed-off-by: Balakrishna Godavarthi --- drivers/bluetooth/hci_qca.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index 53deea2..5cbed6a 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -69,6 +69,8 @@ #define QCA_LAST_SEQUENCE_NUM 0xFFFF #define QCA_CRASHBYTE_PACKET_LEN 1096 #define QCA_MEMDUMP_BYTE 0xFB +#define QCA_SSR_OPCODE 0xFC0C +#define QCA_SSR_PKT_LEN 5 enum qca_flags { QCA_IBS_DISABLED, @@ -871,6 +873,14 @@ static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb) /* Prepend skb with frame type */ memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); + if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT && + skb->len == QCA_SSR_PKT_LEN && + hci_skb_opcode(skb) == QCA_SSR_OPCODE) { + bt_dev_info(hu->hdev, "Triggering ssr"); + set_bit(QCA_SSR_TRIGGERED, &qca->flags); + set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); + } + spin_lock_irqsave(&qca->hci_ibs_lock, flags); /* Don't go to sleep in middle of patch download or