From patchwork Wed Nov 18 23:43:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abhishek Pandit-Subedi X-Patchwork-Id: 327489 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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 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 93224C64E7A for ; Wed, 18 Nov 2020 23:44:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4DF98246CB for ; Wed, 18 Nov 2020 23:44:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Lhy85aur" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727356AbgKRXoI (ORCPT ); Wed, 18 Nov 2020 18:44:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726081AbgKRXoH (ORCPT ); Wed, 18 Nov 2020 18:44:07 -0500 Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 861AEC0613D4 for ; Wed, 18 Nov 2020 15:44:07 -0800 (PST) Received: by mail-pl1-x641.google.com with SMTP id x15so1918807pll.2 for ; Wed, 18 Nov 2020 15:44:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=cfKp0r4v8KnHJMFIsfD8HVI4xTIgCH6NiDoEg1v+fx4=; b=Lhy85aur6ZtATaH4lMCvfHShYvSTGUd2rdwP41a6bLZ7s+KRY59Trub1cY+9uEsD2/ xecK2ZvoziQ/+MfCVOFcA4+9YUMUBWZLEN7jLNepCP6799YapzJIo5yI0j4igCuMeGZb /v0KkHpxKepHoUoRVN+RYY2Srq4SA/vqsFguM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=cfKp0r4v8KnHJMFIsfD8HVI4xTIgCH6NiDoEg1v+fx4=; b=UUEVwbbRoMbvrGW8o9oUVcab/nWLL2uqx/QalFzU6aiwsxVO7olC1m1xhzbvYcsx6r JM9CaNw9ZrABngXdzFmcBRocOBAf2B2KtVS+2i2YWngZbsahgcbjNAung8bS3xSUQmeP 9VNL8JnKb8iabVnwykRtVtD+wd2LYdEmrdQNbapemz25kXFUKrvIZpT4yRYI9jvxerDm +5LULxDEXm47Vub0rCkfTxhZcBqEqwh4N1tjhpnfp3uGVYcGTE4sLYpfbkJkNnSYi/9a OJ/H4aBix9cNvv984Ctmu/kmSCY+obIazEIJaL2IgwcAib8YAKymCSA90akFrRbqVYCz 9Zaw== X-Gm-Message-State: AOAM531ceZZG9D7PxO4HgFt17P6Yx28RElADyXqJREUB6eBIoUktDEVM XnjUSOOnkiwCViViLEBk3rQbDg== X-Google-Smtp-Source: ABdhPJwwaHEZy70mLOkmnmMTTboXZBQPl6Emv6az9gRrpwahfvoJjzfc3++alZHHSbv+M50V5DcIpg== X-Received: by 2002:a17:902:a5c5:b029:d9:d27d:a1ce with SMTP id t5-20020a170902a5c5b02900d9d27da1cemr2701575plq.78.1605743047090; Wed, 18 Nov 2020 15:44:07 -0800 (PST) Received: from apsdesk.mtv.corp.google.com ([2620:15c:202:1:7220:84ff:fe09:2b94]) by smtp.gmail.com with ESMTPSA id f6sm21437435pgi.70.2020.11.18.15.44.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Nov 2020 15:44:06 -0800 (PST) From: Abhishek Pandit-Subedi To: marcel@holtmann.org, linux-bluetooth@vger.kernel.org Cc: chromeos-bluetooth-upstreaming@chromium.org, mcchou@chromium.org, danielwinkler@chromium.org, Abhishek Pandit-Subedi , "David S. Miller" , Johan Hedberg , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jakub Kicinski Subject: [PATCH 2/3] Bluetooth: Add quirk to power down on suspend Date: Wed, 18 Nov 2020 15:43:51 -0800 Message-Id: <20201118154349.2.Ia5f019f5309cc9f2be9070484a001dc7ddaca354@changeid> X-Mailer: git-send-email 2.29.2.299.gdc1121823c-goog In-Reply-To: <20201118234352.2138694-1-abhishekpandit@chromium.org> References: <20201118234352.2138694-1-abhishekpandit@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Some older controllers fail to enter a quiescent state reliably when supporting remote wake. For those cases, add a quirk that will power down the controller when suspending and power it back up when resuming. Signed-off-by: Abhishek Pandit-Subedi Reviewed-by: Miao-chen Chou --- include/net/bluetooth/hci.h | 7 +++++ include/net/bluetooth/hci_core.h | 4 +++ net/bluetooth/hci_core.c | 48 ++++++++++++++++++++++++++++++-- net/bluetooth/hci_request.c | 26 ++++++++++++++++- 4 files changed, 82 insertions(+), 3 deletions(-) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index c8e67042a3b14c..88d5c9554e4840 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -238,6 +238,13 @@ enum { * during the hdev->setup vendor callback. */ HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, + + /* When this quirk is set, the adapter will be powered down during + * system suspend and powerd up on resume. This should be used on + * controllers that don't behave well during suspend, either causing + * spurious wakeups or not entering a suspend state reliably. + */ + HCI_QUIRK_POWER_DOWN_SYSTEM_SUSPEND, }; /* HCI device flags */ diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index ff32d5a856f17f..e7dc6e3efbf246 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -90,6 +90,7 @@ struct discovery_state { }; #define SUSPEND_NOTIFIER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */ +#define SUSPEND_POWER_DOWN_TIMEOUT msecs_to_jiffies(1000) enum suspend_tasks { SUSPEND_PAUSE_DISCOVERY, @@ -112,6 +113,9 @@ enum suspended_state { BT_RUNNING = 0, BT_SUSPEND_DISCONNECT, BT_SUSPEND_CONFIGURE_WAKE, + BT_SUSPEND_DO_POWER_DOWN, + BT_SUSPEND_DO_POWER_UP, + BT_SUSPEND_POWERED_DOWN, /* Powered down prior to suspend */ }; struct hci_conn_hash { diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 8e90850d6d769e..d73e097d3ce16b 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -3562,6 +3562,7 @@ static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action, container_of(nb, struct hci_dev, suspend_notifier); int ret = 0; u8 state = BT_RUNNING; + bool powered; /* If powering down, wait for completion. */ if (mgmt_powering_down(hdev)) { @@ -3571,8 +3572,51 @@ static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action, goto done; } - /* Suspend notifier should only act on events when powered. */ - if (!hdev_is_powered(hdev)) + powered = hdev_is_powered(hdev); + + /* Update the suspend state when entering suspend if the system is + * currently powered off or if it is powered on but was previously + * powered off. + */ + if (action == PM_SUSPEND_PREPARE) { + /* Must hold dev lock when modifying suspend state. */ + hci_dev_lock(hdev); + if (powered && hdev->suspend_state == BT_SUSPEND_POWERED_DOWN) + hdev->suspend_state = BT_RUNNING; + else if (!powered && + hdev->suspend_state != BT_SUSPEND_POWERED_DOWN) + hdev->suspend_state = BT_SUSPEND_POWERED_DOWN; + + hci_dev_unlock(hdev); + } + + /* When the power down quirk is set, we power down the adapter when + * suspending and power it up when resuming. If the adapter was already + * powered down before suspend, we don't do anything here. + */ + if (test_bit(HCI_QUIRK_POWER_DOWN_SYSTEM_SUSPEND, &hdev->quirks) && + hdev->suspend_state != BT_SUSPEND_POWERED_DOWN) { + if (action == PM_SUSPEND_PREPARE && powered) { + state = BT_SUSPEND_DO_POWER_DOWN; + ret = hci_change_suspend_state(hdev, state); + + /* Emit that we're powering down for suspend */ + hci_clear_wake_reason(hdev); + mgmt_suspending(hdev, state); + goto done; + } else if (action == PM_POST_SUSPEND && !powered) { + /* Emit that we're resuming before powering up. */ + mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr, + hdev->wake_addr_type); + + state = BT_SUSPEND_DO_POWER_UP; + ret = hci_change_suspend_state(hdev, state); + goto done; + } + } + + /* Skip to end if we weren't powered. */ + if (!powered) goto done; if (action == PM_SUSPEND_PREPARE) { diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c index 048d4db9d4ea53..804bd0652edd1c 100644 --- a/net/bluetooth/hci_request.c +++ b/net/bluetooth/hci_request.c @@ -1194,6 +1194,7 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next) struct hci_request req; u8 page_scan; int disconnect_counter; + int err; if (next == hdev->suspend_state) { bt_dev_dbg(hdev, "Same state before and after: %d", next); @@ -1273,7 +1274,7 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next) /* Pause scan changes again. */ hdev->scanning_paused = true; hci_req_run(&req, suspend_req_complete); - } else { + } else if (next == BT_RUNNING) { hdev->suspended = false; hdev->scanning_paused = false; @@ -1306,6 +1307,29 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next) } hci_req_run(&req, suspend_req_complete); + } else if (next == BT_SUSPEND_DO_POWER_DOWN) { + hdev->suspended = true; + hdev->scanning_paused = true; + + err = hci_clean_up_state(hdev); + + if (!err) + queue_delayed_work(hdev->req_workqueue, + &hdev->power_off, + SUSPEND_POWER_DOWN_TIMEOUT); + + if (err == -ENODATA) { + cancel_delayed_work(&hdev->power_off); + queue_work(hdev->req_workqueue, &hdev->power_off.work); + err = 0; + } + + set_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks); + } else if (next == BT_SUSPEND_DO_POWER_UP) { + hdev->suspended = false; + hdev->scanning_paused = false; + + queue_work(hdev->req_workqueue, &hdev->power_on); } hdev->suspend_state = next;