From patchwork Wed Jun 30 08:08:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "K, Kiran" X-Patchwork-Id: 12351547 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=-14.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 13899C11F65 for ; Wed, 30 Jun 2021 08:04:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED9CA61C82 for ; Wed, 30 Jun 2021 08:04:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232954AbhF3IG2 (ORCPT ); Wed, 30 Jun 2021 04:06:28 -0400 Received: from mga07.intel.com ([134.134.136.100]:5410 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232966AbhF3IG2 (ORCPT ); Wed, 30 Jun 2021 04:06:28 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10030"; a="272164641" X-IronPort-AV: E=Sophos;i="5.83,311,1616482800"; d="scan'208";a="272164641" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2021 01:03:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,311,1616482800"; d="scan'208";a="643997952" Received: from intel-lenovo-legion-y540-15irh-pg0.iind.intel.com ([10.224.186.95]) by fmsmga005.fm.intel.com with ESMTP; 30 Jun 2021 01:03:58 -0700 From: Kiran K To: linux-bluetooth@vger.kernel.org Cc: Kiran K Subject: [PATCH v10 04/10] Bluetooth: Allow querying of supported offload codecs over SCO socket Date: Wed, 30 Jun 2021 13:38:01 +0530 Message-Id: <20210630080807.12600-4-kiran.k@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210630080807.12600-1-kiran.k@intel.com> References: <20210630080807.12600-1-kiran.k@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Add BT_CODEC option for getsockopt systemcall to get the details of offload codecs supported over SCO socket Signed-off-by: Kiran K Reviewed-by: Chethan T N Reviewed-by: Srivatsa Ravishankar --- * changes in v10: - In getsockopt, prepare data in advance and call copy_to_user istead of calling put_user on each field of struct bt_codec include/net/bluetooth/bluetooth.h | 20 +++++++ include/net/bluetooth/hci.h | 6 ++ include/net/bluetooth/hci_core.h | 3 + net/bluetooth/sco.c | 95 +++++++++++++++++++++++++++++++ 4 files changed, 124 insertions(+) diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h index 9125effbf448..1840756958ce 100644 --- a/include/net/bluetooth/bluetooth.h +++ b/include/net/bluetooth/bluetooth.h @@ -153,6 +153,26 @@ struct bt_voice { #define BT_SCM_PKT_STATUS 0x03 +#define BT_CODEC 19 + +struct bt_codec_caps { + __u8 len; + __u8 data[]; +} __packed; + +struct bt_codec { + __u8 id; + __le16 cid; + __le16 vid; + __u8 data_path; + __u8 num_caps; +} __packed; + +struct bt_codecs { + __u8 num_codecs; + struct bt_codec codecs[]; +} __packed; + __printf(1, 2) void bt_info(const char *fmt, ...); __printf(1, 2) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index b4e35cf5f4b1..5e4306a46324 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -2621,6 +2621,12 @@ static inline struct hci_sco_hdr *hci_sco_hdr(const struct sk_buff *skb) #define hci_iso_data_len(h) ((h) & 0x3fff) #define hci_iso_data_flags(h) ((h) >> 14) +#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS) +/* codec transport types */ +#define TRANSPORT_ACL 0x00 +#define TRANSPORT_SCO_ESCO 0x01 +#endif + /* le24 support */ static inline void hci_cpu_to_le24(__u32 val, __u8 dst[3]) { diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 7b8d603358b9..00c97e2ce1fd 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -621,6 +621,9 @@ struct hci_dev { int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr); void (*cmd_timeout)(struct hci_dev *hdev); bool (*prevent_wake)(struct hci_dev *hdev); +#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS) + int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path); +#endif }; #define HCI_PHY_HANDLE(handle) (handle & 0xff) diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index d9a4e88dacbb..ddf9b6bd9ca3 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -948,6 +948,14 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname, struct bt_voice voice; u32 phys; int pkt_status; +#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS) + int buf_len; + struct codec_list *c; + u8 num_codecs, i, __user *ptr; + struct hci_dev *hdev; + struct hci_codec_caps *caps; + struct bt_codec codec; +#endif BT_DBG("sk %p", sk); @@ -1012,6 +1020,93 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname, err = -EFAULT; break; +#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS) + case BT_CODEC: + num_codecs = 0; + buf_len = 0; + + hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR); + if (!hdev) { + err = -EBADFD; + break; + } + + if (!hdev->get_data_path_id) { + err = -EOPNOTSUPP; + break; + } + + /* find total buffer size required to copy codec + caps */ + hci_dev_lock(hdev); + list_for_each_entry(c, &hdev->local_codecs, list) { + if (c->transport != TRANSPORT_SCO_ESCO) + continue; + num_codecs++; + for (i = 0, caps = c->caps; i < c->num_caps; i++) { + buf_len += 1 + caps->len; + caps = (void *)&caps->data[caps->len]; + } + buf_len += sizeof(struct bt_codec); + } + hci_dev_unlock(hdev); + + buf_len += sizeof(struct bt_codecs); + if (buf_len > len) { + err = -ENOBUFS; + break; + } + ptr = optval; + + if (put_user(num_codecs, ptr)) { + err = -EFAULT; + break; + } + ptr += sizeof(num_codecs); + + /* Iterate all the codecs supported over SCO and populate + * codec data + */ + hci_dev_lock(hdev); + list_for_each_entry(c, &hdev->local_codecs, list) { + if (c->transport != TRANSPORT_SCO_ESCO) + continue; + + codec.id = c->id; + codec.cid = c->cid; + codec.vid = c->vid; + err = hdev->get_data_path_id(hdev, &codec.data_path); + if (err < 0) + break; + codec.num_caps = c->num_caps; + if (copy_to_user(ptr, &codec, sizeof(codec))) { + err = -EFAULT; + break; + } + ptr += sizeof(codec); + + /* find codec capabilities data length */ + len = 0; + for (i = 0, caps = c->caps; i < c->num_caps; i++) { + len += 1 + caps->len; + caps = (void *)&caps->data[caps->len]; + } + + /* copy codec capabilities data */ + if (len && copy_to_user(ptr, c->caps, len)) { + err = -EFAULT; + break; + } + ptr += len; + } + + if (!err && put_user(buf_len, optlen)) + err = -EFAULT; + + hci_dev_unlock(hdev); + + break; +#endif + default: err = -ENOPROTOOPT; break;