From patchwork Sat Jul 11 11:31:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Venkata Lakshmi Narayana Gubba X-Patchwork-Id: 11657895 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7181E92A for ; Sat, 11 Jul 2020 11:32:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6334F2077D for ; Sat, 11 Jul 2020 11:32:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728025AbgGKLbl (ORCPT ); Sat, 11 Jul 2020 07:31:41 -0400 Received: from alexa-out.qualcomm.com ([129.46.98.28]:13526 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726725AbgGKLbl (ORCPT ); Sat, 11 Jul 2020 07:31:41 -0400 Received: from ironmsg09-lv.qualcomm.com ([10.47.202.153]) by alexa-out.qualcomm.com with ESMTP; 11 Jul 2020 04:31:40 -0700 Received: from ironmsg02-blr.qualcomm.com ([10.86.208.131]) by ironmsg09-lv.qualcomm.com with ESMTP/TLS/AES256-SHA; 11 Jul 2020 04:31:38 -0700 Received: from gubbaven-linux.qualcomm.com ([10.206.64.32]) by ironmsg02-blr.qualcomm.com with ESMTP; 11 Jul 2020 17:01:16 +0530 Received: by gubbaven-linux.qualcomm.com (Postfix, from userid 2365015) id 5534B21515; Sat, 11 Jul 2020 17:01:15 +0530 (IST) From: Venkata Lakshmi Narayana Gubba 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, bgodavar@codeaurora.org, rjliao@codeaurora.org, hbandi@codeaurora.org, abhishekpandit@chromium.org, Venkata Lakshmi Narayana Gubba Subject: [PATCH v1] Bluetooth: hci_qca: Bug fixes for SSR Date: Sat, 11 Jul 2020 17:01:12 +0530 Message-Id: <1594467072-13332-1-git-send-email-gubbaven@codeaurora.org> X-Mailer: git-send-email 2.7.4 Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org 1.During SSR for command time out if BT SoC goes to inresponsive state, power cycling of BT SoC was not happening.Given the fix by sending hw error event to reset the BT SoC. 2.If SSR is triggered then ignore the transmit data requests to BT SoC until SSR is completed. Signed-off-by: Venkata Lakshmi Narayana Gubba --- drivers/bluetooth/hci_qca.c | 40 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 36 insertions(+), 4 deletions(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index 7e39546..bfebefa 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -72,7 +72,8 @@ enum qca_flags { QCA_DROP_VENDOR_EVENT, QCA_SUSPENDING, QCA_MEMDUMP_COLLECTION, - QCA_HW_ERROR_EVENT + QCA_HW_ERROR_EVENT, + QCA_SSR_TRIGGERED }; enum qca_capabilities { @@ -854,6 +855,13 @@ static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb) BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb, qca->tx_ibs_state); + if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { + /* As SSR is in progress,Ignore the packets */ + bt_dev_dbg(hu->hdev, "SSR is in progress"); + kfree_skb(skb); + return 0; + } + /* Prepend skb with frame type */ memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); @@ -1123,6 +1131,7 @@ static int qca_controller_memdump_event(struct hci_dev *hdev, struct hci_uart *hu = hci_get_drvdata(hdev); struct qca_data *qca = hu->priv; + set_bit(QCA_SSR_TRIGGERED, &qca->flags); skb_queue_tail(&qca->rx_memdump_q, skb); queue_work(qca->workqueue, &qca->ctrl_memdump_evt); @@ -1481,6 +1490,7 @@ static void qca_hw_error(struct hci_dev *hdev, u8 code) struct hci_uart *hu = hci_get_drvdata(hdev); struct qca_data *qca = hu->priv; + set_bit(QCA_SSR_TRIGGERED, &qca->flags); set_bit(QCA_HW_ERROR_EVENT, &qca->flags); bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state); @@ -1529,10 +1539,30 @@ static void qca_cmd_timeout(struct hci_dev *hdev) struct hci_uart *hu = hci_get_drvdata(hdev); struct qca_data *qca = hu->priv; - if (qca->memdump_state == QCA_MEMDUMP_IDLE) + set_bit(QCA_SSR_TRIGGERED, &qca->flags); + if (qca->memdump_state == QCA_MEMDUMP_IDLE) { + set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); qca_send_crashbuffer(hu); - else - bt_dev_info(hdev, "Dump collection is in process"); + qca_wait_for_dump_collection(hdev); + } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { + /* Let us wait here until memory dump collected or + * memory dump timer expired. + */ + bt_dev_info(hdev, "waiting for dump to complete"); + qca_wait_for_dump_collection(hdev); + } + + mutex_lock(&qca->hci_memdump_lock); + if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { + qca->memdump_state = QCA_MEMDUMP_TIMEOUT; + if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { + /* Inject hw error event to reset the device + * and driver. + */ + hci_reset_dev(hu->hdev); + } + } + mutex_unlock(&qca->hci_memdump_lock); } static int qca_wcn3990_init(struct hci_uart *hu) @@ -1643,6 +1673,8 @@ static int qca_setup(struct hci_uart *hu) if (ret) return ret; + clear_bit(QCA_SSR_TRIGGERED, &qca->flags); + if (qca_is_wcn399x(soc_type)) { set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);