From patchwork Tue Dec 22 09:57:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Archie Pusaka X-Patchwork-Id: 11986199 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=-26.2 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 82D23C433DB for ; Tue, 22 Dec 2020 09:59:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 45F792310D for ; Tue, 22 Dec 2020 09:59:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726546AbgLVJ6q (ORCPT ); Tue, 22 Dec 2020 04:58:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726485AbgLVJ6k (ORCPT ); Tue, 22 Dec 2020 04:58:40 -0500 Received: from mail-qk1-x74a.google.com (mail-qk1-x74a.google.com [IPv6:2607:f8b0:4864:20::74a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C367FC0611CE for ; Tue, 22 Dec 2020 01:57:30 -0800 (PST) Received: by mail-qk1-x74a.google.com with SMTP id 188so11375156qkh.7 for ; Tue, 22 Dec 2020 01:57:30 -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=IfrSEfLFQE31I1dbD09KG7xsA8Rrf54du5V/9TJa44M=; b=Yenl2bkqs81QPGmXawAKiP4fcN2CPW/EZjxXaPbd0w9eCdzP4AzU+Zz+5JyeozEFDA G/ue1m8QdLg6uenO+AMGUxCfwFwPl+V0UlTEV0Y9G4+V4uCwczWGH6+ixOfO7bvhQVED vULWDfDe6hmtrnlHwGJu1Y319SRrZ/S9YNnec7oteEHF0jqd9dkrdAPfyXM40+a7Xnax UZaG0MzkPa8/5uYiWGE/OdFwGTFfgcxRw0YuennYzRoPruqjRZ8jl+cO3Bk+XNYE9oVx 9YutlK7lg4/8eGYBbOSvl3dnUSmqtqJgl4AbPKwyNIltWh0vllaAqSy4Y1Ga0FMbd6y2 dTTg== 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=IfrSEfLFQE31I1dbD09KG7xsA8Rrf54du5V/9TJa44M=; b=Qf18lG8S/VZ84GtQgncQaGBA5VhmSmIbxTxmlqRH2st37R4ZOqDu7s6F0qa1VpTbSd I/RJv+YEC5cyPjg6ii7IOsXTK2oA4B7sgzsy7jAM0uwtnWIXrrVn55TovaXGqLvCkXrJ XlfWwtV7q5n1HR8L2jPdtkKtzdhPGT2U/dXnXxDyq/7X5/pD9Bj4bHrmU1el+0x26+05 7sOk+M7q0luChdjauFwrN7R3gMlq5ac/9FQbbKzsELmakk7yLaoVI7J/KPpkvmepT3SL +KttHPWFxPJ/SSXHbkw3RE8+j47Wjusq/BMB9cFNfrD1Dg2QYrvhAU+m/YIDTumY2wbe mHrw== X-Gm-Message-State: AOAM531143+qn7cE0/H+5H+7FSJGF383Uey8HJXOdNYDbG6wcD84lD9o Zi+xht4G1jaZuCQMT5iznymWTrd1BK6ocnnhnqHbuBS0/pEIqKelr2B6D469hZgUFsVoN7CRT5K cT2iefxas6Y4iStGaxEcOCV36KwNPJ6xcN1KPtczA5vRC1vl0u+9A0XB13Iqq88PSUsp9qy7hY/ B1 X-Google-Smtp-Source: ABdhPJyO8XoLkBW9q066odiYTryaeIeNxqbwdPeUFxzgCoYctGfCgiiAuccLcgQuiQIPnGO5qIHEkgLz7Tkb Sender: "apusaka via sendgmr" X-Received: from apusaka-p920.tpe.corp.google.com ([172.30.210.44]) (user=apusaka job=sendgmr) by 2002:ad4:52c3:: with SMTP id p3mr21298959qvs.52.1608631049959; Tue, 22 Dec 2020 01:57:29 -0800 (PST) Date: Tue, 22 Dec 2020 17:57:05 +0800 In-Reply-To: <20201222095706.948827-1-apusaka@google.com> Message-Id: <20201222175659.v4.4.I215b0904cb68d68ac780a0c75c06f7d12e6147b7@changeid> Mime-Version: 1.0 References: <20201222095706.948827-1-apusaka@google.com> X-Mailer: git-send-email 2.29.2.729.g45daf8777d-goog Subject: [PATCH v4 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 */