From patchwork Wed Dec 16 04:33:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Archie Pusaka X-Patchwork-Id: 11976329 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable 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 D915EC2BBD5 for ; Wed, 16 Dec 2020 04:34:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B34F023123 for ; Wed, 16 Dec 2020 04:34:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725837AbgLPEey (ORCPT ); Tue, 15 Dec 2020 23:34:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33212 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725821AbgLPEet (ORCPT ); Tue, 15 Dec 2020 23:34:49 -0500 Received: from mail-qv1-xf49.google.com (mail-qv1-xf49.google.com [IPv6:2607:f8b0:4864:20::f49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 01481C0611CC for ; Tue, 15 Dec 2020 20:33:57 -0800 (PST) Received: by mail-qv1-xf49.google.com with SMTP id i2so15824387qvb.2 for ; Tue, 15 Dec 2020 20:33:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=zeiKZe2SqMMcR1bNzfI2giJ/WilJHjruARqdlPkMIAQ=; b=MaFdd1tjo3SHB+bbOm+MUoAo9lXKy4J3GaGC1Rz4H9/bE8tvpgph68BJrG6tJ+cCMC MlgeObTbox0TQHGPzTSZ9tKSd95IG75r72sz8VEVYb4zh2v3WAjfY3H/IR2D7bEf8ppi 9bOQmGTqJs0ag3CzxxWW7NVDNeP8y771XCiI41bryYxSdOG6GbV35Z5CMMHfRQRGvnjZ 0SA0Y+C5VI+6QpUD8qrviEe1gKE6G6FxQadOpxycNGU5rsRRz9FIXd1rKLsUPJWeqjxX RIHEPW8DsGHLxEDgPcLsdgGd5k6peRs5GWOcrckqGw2oWVGcrX3yYfWqRYZKgwqkQN7A IQ7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=zeiKZe2SqMMcR1bNzfI2giJ/WilJHjruARqdlPkMIAQ=; b=P+g097EqVT9/jjfNL3G/oav9OhOe5D/YJcOAn5fIGzDvQOwOBBXqDebRF+YwRZMrev VkQoE0q3p8SNhF8KpMv8e0RYRIUTRA/Oyv8B+Rhwf5yCB4ButeXi9AWQvOgGWJYlPQM8 upOWtLIXJs3e4oZT4ae/ZfjtrQMqNHW5gAKyoWHMwTZLrjwuJOIKoznM4F0+qWY2lJrV T6yCOLk9Ya8PevV0MYv28fsxQ/Ypff6LFE9k/8rb0SFduXumgc9cba6DCzRQU6Um2N2Y dKuOeLzLEBV14HTdq6QPA9Fyroia9DPuZeUEmEGS/yPjBn9IKz8j1xU2e8Byq8ZXcj3i N4wQ== X-Gm-Message-State: AOAM533+fzC2DIGJR2r4qERsXbt19EM6nd6HbgUmjw1vm8+rYiTacVPX mBE7Qqm8Dwo2vnxqts3UCzVarKeHpvbzmM+q5CKtQ1no+BP26O9V37a/1p5nl7mBiWcdkVP3ee2 6oDeOsFrorn1eXmSBLzCeNk1YQ4xHNIUHrOQcgL2V+sxIAa7QF9brG+cEniwcv66Co20n2CPlkA SY X-Google-Smtp-Source: ABdhPJzF3GuTGyNLJlvtJ1BbMino6VbNfvzyS+xqU7whMjXK7OhAB3mAm98aQ+B0B64xMW2ohZPdTyBA9q+e Sender: "apusaka via sendgmr" X-Received: from apusaka-p920.tpe.corp.google.com ([2401:fa00:1:b:f693:9fff:fef4:2347]) (user=apusaka job=sendgmr) by 2002:a0c:a905:: with SMTP id y5mr15122583qva.55.1608093236079; Tue, 15 Dec 2020 20:33:56 -0800 (PST) Date: Wed, 16 Dec 2020 12:33:34 +0800 In-Reply-To: <20201216043335.2185278-1-apusaka@google.com> Message-Id: <20201216123317.v3.4.I215b0904cb68d68ac780a0c75c06f7d12e6147b7@changeid> Mime-Version: 1.0 References: <20201216043335.2185278-1-apusaka@google.com> X-Mailer: git-send-email 2.29.2.684.gfbc64c5ab5-goog Subject: [PATCH v3 4/5] Bluetooth: advmon offload MSFT handle controller reset From: Archie Pusaka To: linux-bluetooth , Marcel Holtmann Cc: CrosBT Upstreaming , Archie Pusaka , Miao-chen Chou , Yun-Hao Chung , "David S. Miller" , Jakub Kicinski , Johan Hedberg , Luiz Augusto von Dentz , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Archie Pusaka When the controller is powered off, the registered advertising monitor is removed from the controller. This patch handles the re-registration of those monitors when the power is on. Signed-off-by: Archie Pusaka Reviewed-by: Miao-chen Chou Reviewed-by: Yun-Hao Chung --- (no changes since v1) net/bluetooth/msft.c | 79 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 74 insertions(+), 5 deletions(-) diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c index f5aa0e3b1b9b..7e33a85c3f1c 100644 --- a/net/bluetooth/msft.c +++ b/net/bluetooth/msft.c @@ -82,8 +82,15 @@ struct msft_data { struct list_head handle_map; __u16 pending_add_handle; __u16 pending_remove_handle; + + struct { + u8 reregistering:1; + } flags; }; +static int __msft_add_monitor_pattern(struct hci_dev *hdev, + struct adv_monitor *monitor); + bool msft_monitor_supported(struct hci_dev *hdev) { return !!(msft_get_features(hdev) & MSFT_FEATURE_MASK_LE_ADV_MONITOR); @@ -134,6 +141,35 @@ static bool read_supported_features(struct hci_dev *hdev, return false; } +/* This function requires the caller holds hdev->lock */ +static void reregister_monitor_on_restart(struct hci_dev *hdev, int handle) +{ + struct adv_monitor *monitor; + struct msft_data *msft = hdev->msft_data; + int err; + + while (1) { + monitor = idr_get_next(&hdev->adv_monitors_idr, &handle); + if (!monitor) { + /* All monitors have been reregistered */ + msft->flags.reregistering = false; + hci_update_background_scan(hdev); + return; + } + + msft->pending_add_handle = (u16)handle; + err = __msft_add_monitor_pattern(hdev, monitor); + + /* If success, we return and wait for monitor added callback */ + if (!err) + return; + + /* Otherwise remove the monitor and keep registering */ + hci_free_adv_monitor(hdev, monitor); + handle++; + } +} + void msft_do_open(struct hci_dev *hdev) { struct msft_data *msft; @@ -154,12 +190,18 @@ void msft_do_open(struct hci_dev *hdev) INIT_LIST_HEAD(&msft->handle_map); hdev->msft_data = msft; + + if (msft_monitor_supported(hdev)) { + msft->flags.reregistering = true; + reregister_monitor_on_restart(hdev, 0); + } } void msft_do_close(struct hci_dev *hdev) { struct msft_data *msft = hdev->msft_data; struct msft_monitor_advertisement_handle_data *handle_data, *tmp; + struct adv_monitor *monitor; if (!msft) return; @@ -169,6 +211,12 @@ void msft_do_close(struct hci_dev *hdev) hdev->msft_data = NULL; list_for_each_entry_safe(handle_data, tmp, &msft->handle_map, list) { + monitor = idr_find(&hdev->adv_monitors_idr, + handle_data->mgmt_handle); + + if (monitor && monitor->state == ADV_MONITOR_STATE_OFFLOADED) + monitor->state = ADV_MONITOR_STATE_REGISTERED; + list_del(&handle_data->list); kfree(handle_data); } @@ -282,9 +330,15 @@ static void msft_le_monitor_advertisement_cb(struct hci_dev *hdev, if (status && monitor) hci_free_adv_monitor(hdev, monitor); + /* If in restart/reregister sequence, keep registering. */ + if (msft->flags.reregistering) + reregister_monitor_on_restart(hdev, + msft->pending_add_handle + 1); + hci_dev_unlock(hdev); - hci_add_adv_patterns_monitor_complete(hdev, status); + if (!msft->flags.reregistering) + hci_add_adv_patterns_monitor_complete(hdev, status); } static void msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev, @@ -374,7 +428,8 @@ static bool msft_monitor_pattern_valid(struct adv_monitor *monitor) } /* This function requires the caller holds hdev->lock */ -int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor) +static int __msft_add_monitor_pattern(struct hci_dev *hdev, + struct adv_monitor *monitor) { struct msft_cp_le_monitor_advertisement *cp; struct msft_le_monitor_advertisement_pattern_data *pattern_data; @@ -387,9 +442,6 @@ int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor) u8 pattern_count = 0; int err = 0; - if (!msft) - return -EOPNOTSUPP; - if (!msft_monitor_pattern_valid(monitor)) return -EINVAL; @@ -434,6 +486,20 @@ int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor) return err; } +/* This function requires the caller holds hdev->lock */ +int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor) +{ + struct msft_data *msft = hdev->msft_data; + + if (!msft) + return -EOPNOTSUPP; + + if (msft->flags.reregistering) + return -EBUSY; + + return __msft_add_monitor_pattern(hdev, monitor); +} + /* This function requires the caller holds hdev->lock */ int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor, u16 handle) @@ -447,6 +513,9 @@ int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor, if (!msft) return -EOPNOTSUPP; + if (msft->flags.reregistering) + return -EBUSY; + handle_data = msft_find_handle_data(hdev, monitor->handle, true); /* If no matched handle, just remove without telling controller */