From patchwork Sat Aug 14 07:26:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "K, Kiran" X-Patchwork-Id: 12436543 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=-13.9 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 22ECFC4338F for ; Sat, 14 Aug 2021 07:22:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0227560F51 for ; Sat, 14 Aug 2021 07:22:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237126AbhHNHWj (ORCPT ); Sat, 14 Aug 2021 03:22:39 -0400 Received: from mga04.intel.com ([192.55.52.120]:42835 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236519AbhHNHWh (ORCPT ); Sat, 14 Aug 2021 03:22:37 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10075"; a="213817649" X-IronPort-AV: E=Sophos;i="5.84,321,1620716400"; d="scan'208";a="213817649" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Aug 2021 00:22:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,321,1620716400"; d="scan'208";a="640021988" Received: from intel-lenovo-legion-y540-15irh-pg0.iind.intel.com ([10.224.186.95]) by orsmga005.jf.intel.com with ESMTP; 14 Aug 2021 00:22:07 -0700 From: Kiran K To: linux-bluetooth@vger.kernel.org Cc: Kiran K , Chethan T N , Srivatsa Ravishankar Subject: [PATCH v12 01/10] Bluetooth: Enumerate local supported codec and cache details Date: Sat, 14 Aug 2021 12:56:20 +0530 Message-Id: <20210814072629.11748-1-kiran.k@intel.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Read supported local codecs, codec capabilities and cache the data. Signed-off-by: Kiran K Signed-off-by: Chethan T N Signed-off-by: Srivatsa Ravishankar --- * changes in v12: - refactor funcions related to reading codec capabilities * changes in v11: - Remove Kconfig related changes - Address minor review comments - Move codec related functions to new file hci_codec.c * changes in v10: - define Kconfig to control offload feature at build time - fix review comments * changes in v9: - use shortname vnd instead of ven * changes in v8: - add comments - split __u8 codec_id[5] into {__u8 id; __le16 cid, vid } - address review comment related codec caps structure * changes in v7: - keep codec enumeration call in hci_init instead of having a separate function - Remove unused bitmasks defined for LE transports * changes in v6: - fix compiler warning reported for ARCH=arc * changes in v5: - fix review comments - move code used to read standard/vendor codecs caps into single function * changes in v4: - convert reading of codecs and codecs caps calls from async to sync * changes in v3 - move codec enumeration into a new init function * changes in v2 - add skb length check before accessing data include/net/bluetooth/hci.h | 41 ++++++++ include/net/bluetooth/hci_core.h | 17 +++ net/bluetooth/Makefile | 2 +- net/bluetooth/hci_codec.c | 172 +++++++++++++++++++++++++++++++ net/bluetooth/hci_codec.h | 6 ++ net/bluetooth/hci_core.c | 11 +- 6 files changed, 244 insertions(+), 5 deletions(-) create mode 100644 net/bluetooth/hci_codec.c create mode 100644 net/bluetooth/hci_codec.h diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index b80415011dcd..f76849c8eafd 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -1307,6 +1307,28 @@ struct hci_rp_read_data_block_size { } __packed; #define HCI_OP_READ_LOCAL_CODECS 0x100b +struct hci_std_codecs { + __u8 num; + __u8 codec[]; +} __packed; + +struct hci_vnd_codec { + /* company id */ + __le16 cid; + /* vendor codec id */ + __le16 vid; +} __packed; + +struct hci_vnd_codecs { + __u8 num; + struct hci_vnd_codec codec[]; +} __packed; + +struct hci_rp_read_local_supported_codecs { + __u8 status; + struct hci_std_codecs std_codecs; + struct hci_vnd_codecs vnd_codecs; +} __packed; #define HCI_OP_READ_LOCAL_PAIRING_OPTS 0x100c struct hci_rp_read_local_pairing_opts { @@ -1315,6 +1337,25 @@ struct hci_rp_read_local_pairing_opts { __u8 max_key_size; } __packed; +#define HCI_OP_READ_LOCAL_CODEC_CAPS 0x100e +struct hci_op_read_local_codec_caps { + __u8 id; + __le16 cid; + __le16 vid; + __u8 transport; + __u8 direction; +} __packed; + +struct hci_codec_caps { + __u8 len; + __u8 data[]; +} __packed; + +struct hci_rp_read_local_codec_caps { + __u8 status; + __u8 num_caps; +} __packed; + #define HCI_OP_READ_PAGE_SCAN_ACTIVITY 0x0c1b struct hci_rp_read_page_scan_activity { __u8 status; diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index a7d06d7da602..0c711a5fcd25 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -131,6 +131,17 @@ struct bdaddr_list { u8 bdaddr_type; }; +struct codec_list { + struct list_head list; + u8 id; + __u16 cid; + __u16 vid; + u8 transport; + u8 num_caps; + u32 len; + struct hci_codec_caps caps[]; +}; + struct bdaddr_list_with_irk { struct list_head list; bdaddr_t bdaddr; @@ -536,6 +547,7 @@ struct hci_dev { struct list_head pend_le_conns; struct list_head pend_le_reports; struct list_head blocked_keys; + struct list_head local_codecs; struct hci_dev_stats stat; @@ -1866,4 +1878,9 @@ void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr, #define SCO_AIRMODE_CVSD 0x0000 #define SCO_AIRMODE_TRANSP 0x0003 +#define LOCAL_CODEC_ACL_MASK BIT(0) +#define LOCAL_CODEC_SCO_MASK BIT(1) + +#define TRANSPORT_TYPE_MAX 0x04 + #endif /* __HCI_CORE_H */ diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile index cc0995301f93..f3e439d98b85 100644 --- a/net/bluetooth/Makefile +++ b/net/bluetooth/Makefile @@ -14,7 +14,7 @@ bluetooth_6lowpan-y := 6lowpan.o bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \ hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \ - ecdh_helper.o hci_request.o mgmt_util.o mgmt_config.o + ecdh_helper.o hci_request.o mgmt_util.o mgmt_config.o hci_codec.o bluetooth-$(CONFIG_BT_BREDR) += sco.o bluetooth-$(CONFIG_BT_HS) += a2mp.o amp.o diff --git a/net/bluetooth/hci_codec.c b/net/bluetooth/hci_codec.c new file mode 100644 index 000000000000..f86ca6ba5814 --- /dev/null +++ b/net/bluetooth/hci_codec.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Copyright (C) 2021 Intel Corporation */ + +#include +#include +#include "hci_codec.h" + +static int hci_codec_list_add(struct list_head *list, + struct hci_op_read_local_codec_caps *sent, + struct hci_rp_read_local_codec_caps *rp, + void *caps, + __u32 len) +{ + struct codec_list *entry; + + entry = kzalloc(sizeof(*entry) + len, GFP_KERNEL); + if (!entry) + return -ENOMEM; + + entry->id = sent->id; + if (sent->id == 0xFF) { + entry->cid = __le16_to_cpu(sent->cid); + entry->vid = __le16_to_cpu(sent->vid); + } + entry->transport = sent->transport; + entry->len = len; + entry->num_caps = rp->num_caps; + if (rp->num_caps) + memcpy(entry->caps, caps, len); + list_add(&entry->list, list); + + return 0; +} + +void hci_codec_list_clear(struct list_head *codec_list) +{ + struct codec_list *c, *n; + + list_for_each_entry_safe(c, n, codec_list, list) { + list_del(&c->list); + kfree(c); + } +} + +static void hci_read_codec_capabilities(struct hci_dev *hdev, __u8 transport, + struct hci_op_read_local_codec_caps + *cmd) +{ + __u8 i; + + for (i = 0; i < TRANSPORT_TYPE_MAX; i++) { + if (transport & BIT(i)) { + struct hci_rp_read_local_codec_caps *rp; + struct hci_codec_caps *caps; + struct sk_buff *skb; + __u8 j; + __u32 len; + + cmd->transport = i; + skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODEC_CAPS, + sizeof(*cmd), cmd, + HCI_CMD_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Failed to read codec capabilities (%ld)", + PTR_ERR(skb)); + continue; + } + + if (skb->len < sizeof(*rp)) + goto error; + + rp = (void *)skb->data; + + if (rp->status) + goto error; + + if (!rp->num_caps) { + len = 0; + /* this codec doesn't have capabilities */ + goto skip_caps_parse; + } + + skb_pull(skb, sizeof(*rp)); + + for (j = 0, len = 0; j < rp->num_caps; j++) { + caps = (void *)skb->data; + if (skb->len < sizeof(*caps)) + goto error; + if (skb->len < caps->len) + goto error; + len += sizeof(caps->len) + caps->len; + skb_pull(skb, sizeof(caps->len) + caps->len); + } + +skip_caps_parse: + hci_dev_lock(hdev); + hci_codec_list_add(&hdev->local_codecs, cmd, rp, + (__u8 *)rp + sizeof(*rp), len); + hci_dev_unlock(hdev); +error: + kfree_skb(skb); + } + } +} + +void hci_read_supported_codecs(struct hci_dev *hdev) +{ + struct sk_buff *skb; + struct hci_rp_read_local_supported_codecs *rp; + struct hci_std_codecs *std_codecs; + struct hci_vnd_codecs *vnd_codecs; + struct hci_op_read_local_codec_caps caps; + __u8 i; + + skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL, + HCI_CMD_TIMEOUT); + + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Failed to read local supported codecs (%ld)", + PTR_ERR(skb)); + return; + } + + if (skb->len < sizeof(*rp)) + goto error; + + rp = (void *)skb->data; + + if (rp->status) + goto error; + + skb_pull(skb, sizeof(rp->status)); + + std_codecs = (void *)skb->data; + + /* validate codecs length before accessing */ + if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num) + + sizeof(std_codecs->num)) + goto error; + + /* enumerate codec capabilities of standard codecs */ + memset(&caps, 0, sizeof(caps)); + for (i = 0; i < std_codecs->num; i++) { + caps.id = std_codecs->codec[i]; + caps.direction = 0x00; + hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps); + } + + skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num) + + sizeof(std_codecs->num)); + + vnd_codecs = (void *)skb->data; + + /* validate vendor codecs length before accessing */ + if (skb->len < + flex_array_size(vnd_codecs, codec, vnd_codecs->num) + + sizeof(vnd_codecs->num)) + goto error; + + /* enumerate vendor codec capabilities */ + for (i = 0; i < vnd_codecs->num; i++) { + caps.id = 0xFF; + caps.cid = vnd_codecs->codec[i].cid; + caps.vid = vnd_codecs->codec[i].vid; + caps.direction = 0x00; + hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps); + } + +error: + kfree_skb(skb); +} diff --git a/net/bluetooth/hci_codec.h b/net/bluetooth/hci_codec.h new file mode 100644 index 000000000000..efb0df634ac6 --- /dev/null +++ b/net/bluetooth/hci_codec.h @@ -0,0 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* Copyright (C) 2014 Intel Corporation */ + +void hci_read_supported_codecs(struct hci_dev *hdev); +void hci_codec_list_clear(struct list_head *codec_list); diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index cb2e9e513907..c988c44da95c 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -45,6 +45,7 @@ #include "leds.h" #include "msft.h" #include "aosp.h" +#include "hci_codec.h" static void hci_rx_work(struct work_struct *work); static void hci_cmd_work(struct work_struct *work); @@ -838,10 +839,6 @@ static int hci_init4_req(struct hci_request *req, unsigned long opt) if (hdev->commands[22] & 0x04) hci_set_event_mask_page_2(req); - /* Read local codec list if the HCI command is supported */ - if (hdev->commands[29] & 0x20) - hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL); - /* Read local pairing options if the HCI command is supported */ if (hdev->commands[41] & 0x08) hci_req_add(req, HCI_OP_READ_LOCAL_PAIRING_OPTS, 0, NULL); @@ -937,6 +934,10 @@ static int __hci_init(struct hci_dev *hdev) if (err < 0) return err; + /* Read local codec list if the HCI command is supported */ + if (hdev->commands[29] & 0x20) + hci_read_supported_codecs(hdev); + /* This function is only called when the controller is actually in * configured state. When the controller is marked as unconfigured, * this initialization procedure is not run. @@ -1841,6 +1842,7 @@ int hci_dev_do_close(struct hci_dev *hdev) memset(hdev->eir, 0, sizeof(hdev->eir)); memset(hdev->dev_class, 0, sizeof(hdev->dev_class)); bacpy(&hdev->random_addr, BDADDR_ANY); + hci_codec_list_clear(&hdev->local_codecs); hci_req_sync_unlock(hdev); @@ -3850,6 +3852,7 @@ struct hci_dev *hci_alloc_dev_priv(int sizeof_priv) INIT_LIST_HEAD(&hdev->adv_instances); INIT_LIST_HEAD(&hdev->blocked_keys); + INIT_LIST_HEAD(&hdev->local_codecs); INIT_WORK(&hdev->rx_work, hci_rx_work); INIT_WORK(&hdev->cmd_work, hci_cmd_work); INIT_WORK(&hdev->tx_work, hci_tx_work);