From patchwork Tue Nov 24 18:07:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Winkler X-Patchwork-Id: 1405707 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=J4etFPaW; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CgX860m2Zz9sTc for ; Wed, 25 Nov 2020 05:08:38 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404269AbgKXSIA (ORCPT ); Tue, 24 Nov 2020 13:08:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404263AbgKXSIA (ORCPT ); Tue, 24 Nov 2020 13:08:00 -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 03945C061A4D for ; Tue, 24 Nov 2020 10:08:00 -0800 (PST) Received: by mail-qv1-xf49.google.com with SMTP id q6so15964006qvr.21 for ; Tue, 24 Nov 2020 10:07:59 -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=AXAknEpvKBpoA/tQ74hoSelS5rcDfREdSPoIoNUpV40=; b=J4etFPaWB9eoRCeR0YqudbKLKE8hDVA1YWUNtPxTsVYHrAjlH9jD64QcT+MnHq10JJ PoKYJ0sE8U2mfCE+euxwudoBlPFrnhLMPu9adqFp2GHA82xXpJNQYER0Cycz+xb+PiJb AqZMVIZMO5GrGLfjRiFJ4gCRGOcfyWqmGrJ03fTGuctHvO4LaLtUnvNXTu1BcvlyqG2H W8DPTko8K1iRwYN2REoxnGrFn8rNSZFEGvGUEnG7S0X1ab2XRUQjBiZXx4kz6UEBxpok 3oCeLmMSUvFwa3/290pqPNxe4EpDrtc+MYt+Dtec4dhzDRSk1Z6KHUQwH2V7/PvVqWFL gyAg== 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=AXAknEpvKBpoA/tQ74hoSelS5rcDfREdSPoIoNUpV40=; b=UMGZd1zGYL90Q+3IOEGKaOmu+Dd9au/Z/vmgXregME9edYyipN2gz87iLfyrkHfcgF T/U8BIC0jORk23PjSPKaRQCkm0EStj1ghhgP/aDBB+Fj8TBkcU/DTGQFvv6hUcn+XDTg Qm0QDDOUqfVraStnaYUDIuuhdPk/pDRJ6papxhA4rXHlG1jxgiYH9t4MqCElMnh0gUbm CUtRgv8joFoc3iuu+G/U8NKGTpSLAvzF63yJf4pF+cexpaKzdA/sQdcc527xV9Us9KwT yvAXZHfqpICGIJsU511Jj/+iSeRa4VG3U+x4wm+pIo9URHxrw/Mz8KimhhCU1vD1vqc6 /WmQ== X-Gm-Message-State: AOAM532Mlr5Nae968oJwEdqJNqew+OASLyQiY4TIPXS6lOOW4XdQSc7N UcoiDf+pk4xfaf5dB0pWL/64cqWMCnD7BRfEr0Y0 X-Google-Smtp-Source: ABdhPJzY2C7cnSo/pUL52Dj+KZhufo4Rl/uROB4BC81LmSi4u1oxHg0gsitbJRBwUPJhLB//0CsWRjKN8YpvZyU0zKmn Sender: "danielwinkler via sendgmr" X-Received: from danielwinkler-linux.mtv.corp.google.com ([2620:15c:202:201:f693:9fff:fef4:4e59]) (user=danielwinkler job=sendgmr) by 2002:a25:51c7:: with SMTP id f190mr10223300ybb.299.1606241279107; Tue, 24 Nov 2020 10:07:59 -0800 (PST) Date: Tue, 24 Nov 2020 10:07:45 -0800 In-Reply-To: <20201124180746.1773091-1-danielwinkler@google.com> Message-Id: <20201124100610.v5.4.Ibedcb7af24f1c01a680de4cc8cc5a98951588393@changeid> Mime-Version: 1.0 References: <20201124180746.1773091-1-danielwinkler@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH v5 4/5] Bluetooth: Query LE tx power on startup From: Daniel Winkler To: marcel@holtmann.org Cc: chromeos-bluetooth-upstreaming@chromium.org, linux-bluetooth@vger.kernel.org, Daniel Winkler , Sonny Sasaka , "David S. Miller" , Jakub Kicinski , Johan Hedberg , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Queries tx power via HCI_LE_Read_Transmit_Power command when the hci device is initialized, and stores resulting min/max LE power in hdev struct. If command isn't available (< BT5 support), min/max values both default to HCI_TX_POWER_INVALID. This patch is manually verified by ensuring BT5 devices correctly query and receive controller tx power range. Reviewed-by: Sonny Sasaka Signed-off-by: Daniel Winkler --- Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None include/net/bluetooth/hci.h | 7 +++++++ include/net/bluetooth/hci_core.h | 2 ++ net/bluetooth/hci_core.c | 8 ++++++++ net/bluetooth/hci_event.c | 18 ++++++++++++++++++ 4 files changed, 35 insertions(+) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index c8e67042a3b14c..c1504aa3d9cfd5 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -1797,6 +1797,13 @@ struct hci_cp_le_set_adv_set_rand_addr { bdaddr_t bdaddr; } __packed; +#define HCI_OP_LE_READ_TRANSMIT_POWER 0x204b +struct hci_rp_le_read_transmit_power { + __u8 status; + __s8 min_le_tx_power; + __s8 max_le_tx_power; +} __packed; + #define HCI_OP_LE_READ_BUFFER_SIZE_V2 0x2060 struct hci_rp_le_read_buffer_size_v2 { __u8 status; diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index ab168f46b6d909..9463039f85442c 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -381,6 +381,8 @@ struct hci_dev { __u16 def_page_timeout; __u16 def_multi_adv_rotation_duration; __u16 def_le_autoconnect_timeout; + __s8 min_le_tx_power; + __s8 max_le_tx_power; __u16 pkt_type; __u16 esco_type; diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 3397fc706e87a1..6f7d5ce965d7c8 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -741,6 +741,12 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt) hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL); } + if (hdev->commands[38] & 0x80) { + /* Read LE Min/Max Tx Power*/ + hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER, + 0, NULL); + } + if (hdev->commands[26] & 0x40) { /* Read LE White List Size */ hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, @@ -3656,6 +3662,8 @@ struct hci_dev *hci_alloc_dev(void) hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES; hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION; hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT; + hdev->min_le_tx_power = HCI_TX_POWER_INVALID; + hdev->max_le_tx_power = HCI_TX_POWER_INVALID; hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT; hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT; diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index f193e73ef47c14..67668be3461e93 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -1202,6 +1202,20 @@ static void hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, hci_dev_unlock(hdev); } +static void hci_cc_le_read_transmit_power(struct hci_dev *hdev, + struct sk_buff *skb) +{ + struct hci_rp_le_read_transmit_power *rp = (void *)skb->data; + + BT_DBG("%s status 0x%2.2x", hdev->name, rp->status); + + if (rp->status) + return; + + hdev->min_le_tx_power = rp->min_le_tx_power; + hdev->max_le_tx_power = rp->max_le_tx_power; +} + static void hci_cc_le_set_adv_enable(struct hci_dev *hdev, struct sk_buff *skb) { __u8 *sent, status = *((__u8 *) skb->data); @@ -3582,6 +3596,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb, hci_cc_le_set_adv_set_random_addr(hdev, skb); break; + case HCI_OP_LE_READ_TRANSMIT_POWER: + hci_cc_le_read_transmit_power(hdev, skb); + break; + default: BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode); break;