From patchwork Thu Dec 3 10:29:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Archie Pusaka X-Patchwork-Id: 337554 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=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 E7189C83012 for ; Thu, 3 Dec 2020 10:31:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 85D7821527 for ; Thu, 3 Dec 2020 10:31:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388811AbgLCKbH (ORCPT ); Thu, 3 Dec 2020 05:31:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388803AbgLCKbG (ORCPT ); Thu, 3 Dec 2020 05:31:06 -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 BFC24C061A56 for ; Thu, 3 Dec 2020 02:29:57 -0800 (PST) Received: by mail-qk1-x74a.google.com with SMTP id d206so1565978qkc.23 for ; Thu, 03 Dec 2020 02:29:57 -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=2MP1RjIGFF9D/gvOeRuyKdDPDniKC2v8Hvc4E66Ncv4=; b=XfUAAKss0UY0qd3zenKrgykQBXmePl5ZpSUONNcKrIvjbytcK667A5a8NgGd/UwJjB OAXWgHV6BZ2paYPseVEj3bIkJ9B0DrhmkzZboFt4VlBpF1piOJdX3uFtyTOGEmnVUWUi 7KQc1h6oHbeZXUh3uF7MZLoAKEyMTrd3UHvwVoiOisBY28Zc37wl+6gnKLvUmACYR2iL VHLjkdsVXOUud7YmsY8WOwCtvjWkPSdQ6ViHqgcuK57blLHgAXHTnpfNNDn6R+M1KlaF NhgNIT9GI4sRVHa4uPS6yvG7bYdy4PXJg2hJP/fWef38mi3n44Teeo4kUMZ6e6tl5dwt Royw== 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=2MP1RjIGFF9D/gvOeRuyKdDPDniKC2v8Hvc4E66Ncv4=; b=GPdmnxIipynQXjUt+bvuZH+aKbJr72P5l9X4TbgrVcdw7bd5asuUB4AHT0AELDoagj wGgSifmTAGqmEHiPQsFcZWSyWWEBM12Wq+AuCKQm+2i9+VpOr/pN2R0vPWjE0ciBscyQ 6s3DDxKpC477wJoGv5i1lXxz8VQjU42oxhVICZUj9Sh9qw+Fd6KVRZ1vB0jxCTCMq5X5 /JdSRkYCyN5R7TVxZ0PaszGin4DWNDdWrWh+ZhoAet/lH3bZdiKajbs0hAC1cYOoxj8/ ZFF9FWhhmWMGYdjtQh9UPJPX+/e4joM/orgoonP954EQ2Bd2L5pqQzy9Qc59vMkOAMyt ahIQ== X-Gm-Message-State: AOAM530MCJWDvv3DacT4LJRXU6LB+RRSC4AtG4Z+xhOu5buExewDhJX2 Mj4Jm7tPpr6qlQaFWplkwcooih4IpKtY X-Google-Smtp-Source: ABdhPJx8hnLrP5Y4752iH/6Oc8r0mYAGDMRvTwYVP640yfa09JZ5mkva4W2cHYRhbv6Mw37t78URc0rAp9Ne Sender: "apusaka via sendgmr" X-Received: from apusaka-p920.tpe.corp.google.com ([2401:fa00:1:b:f693:9fff:fef4:2347]) (user=apusaka job=sendgmr) by 2002:ad4:4e47:: with SMTP id eb7mr2397518qvb.39.1606991396908; Thu, 03 Dec 2020 02:29:56 -0800 (PST) Date: Thu, 3 Dec 2020 18:29:32 +0800 In-Reply-To: <20201203102936.4049556-1-apusaka@google.com> Message-Id: <20201203182903.v1.2.I4969a334028027df34dab9740cd16bbce278633c@changeid> Mime-Version: 1.0 References: <20201203102936.4049556-1-apusaka@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH v1 2/5] Bluetooth: advmon offload MSFT add monitor From: Archie Pusaka To: linux-bluetooth , Marcel Holtmann Cc: CrosBT Upstreaming , Archie Pusaka , Manish Mandlik , Miao-chen Chou , Yun-Hao Chung , "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 From: Archie Pusaka Enables advertising monitor offloading to the controller, if MSFT extension is supported. The kernel won't adjust the monitor parameters to match what the controller supports - that is the user space's responsibility. This patch only manages the addition of monitors. Monitor removal is going to be handled by another patch. Signed-off-by: Archie Pusaka Reviewed-by: Manish Mandlik Reviewed-by: Miao-chen Chou Reviewed-by: Yun-Hao Chung --- include/net/bluetooth/hci_core.h | 17 ++- net/bluetooth/hci_core.c | 54 +++++++-- net/bluetooth/mgmt.c | 150 +++++++++++++++-------- net/bluetooth/msft.c | 201 ++++++++++++++++++++++++++++++- net/bluetooth/msft.h | 12 ++ 5 files changed, 369 insertions(+), 65 deletions(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 42d446417817..275061a1b670 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -257,13 +257,20 @@ struct adv_rssi_thresholds { struct adv_monitor { struct list_head patterns; struct adv_rssi_thresholds rssi; - bool active; __u16 handle; + + enum { + ADV_MONITOR_STATE_NOT_REGISTERED, + ADV_MONITOR_STATE_REGISTERED, + ADV_MONITOR_STATE_OFFLOADED + } state; }; #define HCI_MIN_ADV_MONITOR_HANDLE 1 -#define HCI_MAX_ADV_MONITOR_NUM_HANDLES 32 +#define HCI_MAX_ADV_MONITOR_NUM_HANDLES 32 #define HCI_MAX_ADV_MONITOR_NUM_PATTERNS 16 +#define HCI_ADV_MONITOR_EXT_NONE 1 +#define HCI_ADV_MONITOR_EXT_MSFT 2 #define HCI_MAX_SHORT_NAME_LENGTH 10 @@ -1305,9 +1312,12 @@ void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired); void hci_adv_monitors_clear(struct hci_dev *hdev); void hci_free_adv_monitor(struct adv_monitor *monitor); -int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor); +int hci_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status); +bool hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor, + int *err); int hci_remove_adv_monitor(struct hci_dev *hdev, u16 handle); bool hci_is_adv_monitoring(struct hci_dev *hdev); +int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev); void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb); @@ -1783,6 +1793,7 @@ void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev, void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev, u8 instance); int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip); +int mgmt_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status); u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, u16 to_multiplier); diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index c4aa2cbb9269..7f70812dde15 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -3031,27 +3031,55 @@ void hci_free_adv_monitor(struct adv_monitor *monitor) kfree(monitor); } -/* This function requires the caller holds hdev->lock */ -int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor) +int hci_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status) +{ + return mgmt_add_adv_patterns_monitor_complete(hdev, status); +} + +/* Assigns handle to a monitor, and if offloading is supported and power is on, + * also attempts to forward the request to the controller. + * Returns true if request is forwarded (result is pending), false otherwise. + * This function requires the caller holds hdev->lock. + */ +bool hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor, + int *err) { int min, max, handle; - if (!monitor) - return -EINVAL; + *err = 0; + + if (!monitor) { + *err = -EINVAL; + return false; + } min = HCI_MIN_ADV_MONITOR_HANDLE; max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES; handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max, GFP_KERNEL); - if (handle < 0) - return handle; + if (handle < 0) { + *err = handle; + return false; + } - hdev->adv_monitors_cnt++; monitor->handle = handle; - hci_update_background_scan(hdev); + if (!hdev_is_powered(hdev)) + return false; - return 0; + switch (hci_get_adv_monitor_offload_ext(hdev)) { + case HCI_ADV_MONITOR_EXT_NONE: + hci_update_background_scan(hdev); + BT_DBG("%s add monitor status %d", hdev->name, *err); + /* Message was not forwarded to controller - not an error */ + return false; + case HCI_ADV_MONITOR_EXT_MSFT: + *err = msft_add_monitor_pattern(hdev, monitor); + BT_DBG("%s add monitor msft status %d", hdev->name, *err); + break; + } + + return (*err == 0); } static int free_adv_monitor(int id, void *ptr, void *data) @@ -3095,6 +3123,14 @@ bool hci_is_adv_monitoring(struct hci_dev *hdev) return !idr_is_empty(&hdev->adv_monitors_idr); } +int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev) +{ + if (msft_monitor_supported(hdev)) + return HCI_ADV_MONITOR_EXT_MSFT; + + return HCI_ADV_MONITOR_EXT_NONE; +} + struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list, bdaddr_t *bdaddr, u8 type) { diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 5f0f03dcd81d..d32761f64360 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -4167,6 +4167,7 @@ static int read_adv_mon_features(struct sock *sk, struct hci_dev *hdev, int handle, err; size_t rp_size = 0; __u32 supported = 0; + __u32 enabled = 0; __u16 num_handles = 0; __u16 handles[HCI_MAX_ADV_MONITOR_NUM_HANDLES]; @@ -4174,12 +4175,11 @@ static int read_adv_mon_features(struct sock *sk, struct hci_dev *hdev, hci_dev_lock(hdev); - if (msft_get_features(hdev) & MSFT_FEATURE_MASK_LE_ADV_MONITOR) + if (msft_monitor_supported(hdev)) supported |= MGMT_ADV_MONITOR_FEATURE_MASK_OR_PATTERNS; - idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle) { + idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle) handles[num_handles++] = monitor->handle; - } hci_dev_unlock(hdev); @@ -4188,11 +4188,11 @@ static int read_adv_mon_features(struct sock *sk, struct hci_dev *hdev, if (!rp) return -ENOMEM; - /* Once controller-based monitoring is in place, the enabled_features - * should reflect the use. - */ + /* All supported features are currently enabled */ + enabled = supported; + rp->supported_features = cpu_to_le32(supported); - rp->enabled_features = 0; + rp->enabled_features = cpu_to_le32(enabled); rp->max_num_handles = cpu_to_le16(HCI_MAX_ADV_MONITOR_NUM_HANDLES); rp->max_num_patterns = HCI_MAX_ADV_MONITOR_NUM_PATTERNS; rp->num_handles = cpu_to_le16(num_handles); @@ -4208,6 +4208,42 @@ static int read_adv_mon_features(struct sock *sk, struct hci_dev *hdev, return err; } +int mgmt_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status) +{ + struct mgmt_rp_add_adv_patterns_monitor rp; + struct mgmt_pending_cmd *cmd; + struct adv_monitor *monitor; + int err = 0; + + hci_dev_lock(hdev); + + cmd = pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR, hdev); + if (!cmd) + goto done; + + monitor = cmd->user_data; + rp.monitor_handle = cpu_to_le16(monitor->handle); + + if (!status) { + mgmt_adv_monitor_added(cmd->sk, hdev, monitor->handle); + hdev->adv_monitors_cnt++; + if (monitor->state == ADV_MONITOR_STATE_NOT_REGISTERED) + monitor->state = ADV_MONITOR_STATE_REGISTERED; + hci_update_background_scan(hdev); + } + + err = mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, + mgmt_status(status), &rp, sizeof(rp)); + mgmt_pending_remove(cmd); + +done: + hci_dev_unlock(hdev); + bt_dev_dbg(hdev, "add monitor %d complete, status %d", + rp.monitor_handle, status); + + return err; +} + static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) { @@ -4215,27 +4251,35 @@ static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev, struct mgmt_rp_add_adv_patterns_monitor rp; struct adv_monitor *m = NULL; struct adv_pattern *p = NULL; - unsigned int mp_cnt = 0, prev_adv_monitors_cnt; + struct mgmt_pending_cmd *cmd; __u8 cp_ofst = 0, cp_len = 0; - int err, i; + int err, status, i; + bool pending; BT_DBG("request for %s", hdev->name); + hci_dev_lock(hdev); + + if (pending_find(MGMT_OP_SET_LE, hdev) || + pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR, hdev) || + pending_find(MGMT_OP_REMOVE_ADV_MONITOR, hdev)) { + status = MGMT_STATUS_BUSY; + goto unlock; + } + if (len <= sizeof(*cp) || cp->pattern_count == 0) { - err = mgmt_cmd_status(sk, hdev->id, - MGMT_OP_ADD_ADV_PATTERNS_MONITOR, - MGMT_STATUS_INVALID_PARAMS); - goto failed; + status = MGMT_STATUS_INVALID_PARAMS; + goto unlock; } m = kmalloc(sizeof(*m), GFP_KERNEL); if (!m) { - err = -ENOMEM; - goto failed; + status = MGMT_STATUS_NO_RESOURCES; + goto unlock; } INIT_LIST_HEAD(&m->patterns); - m->active = false; + m->state = ADV_MONITOR_STATE_NOT_REGISTERED; m->rssi.low_threshold = cp->rssi.low_threshold; m->rssi.low_threshold_timeout = @@ -4245,29 +4289,25 @@ static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev, __le16_to_cpu(cp->rssi.high_threshold_timeout); m->rssi.sampling_period = cp->rssi.sampling_period; - for (i = 0; i < cp->pattern_count; i++) { - if (++mp_cnt > HCI_MAX_ADV_MONITOR_NUM_PATTERNS) { - err = mgmt_cmd_status(sk, hdev->id, - MGMT_OP_ADD_ADV_PATTERNS_MONITOR, - MGMT_STATUS_INVALID_PARAMS); - goto failed; - } + if (cp->pattern_count > HCI_MAX_ADV_MONITOR_NUM_PATTERNS) { + status = MGMT_STATUS_INVALID_PARAMS; + goto unlock; + } + for (i = 0; i < cp->pattern_count; i++) { cp_ofst = cp->patterns[i].offset; cp_len = cp->patterns[i].length; if (cp_ofst >= HCI_MAX_AD_LENGTH || cp_len > HCI_MAX_AD_LENGTH || (cp_ofst + cp_len) > HCI_MAX_AD_LENGTH) { - err = mgmt_cmd_status(sk, hdev->id, - MGMT_OP_ADD_ADV_PATTERNS_MONITOR, - MGMT_STATUS_INVALID_PARAMS); - goto failed; + status = MGMT_STATUS_INVALID_PARAMS; + goto unlock; } p = kmalloc(sizeof(*p), GFP_KERNEL); if (!p) { - err = -ENOMEM; - goto failed; + status = MGMT_STATUS_NO_RESOURCES; + goto unlock; } p->ad_type = cp->patterns[i].ad_type; @@ -4279,43 +4319,49 @@ static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev, list_add(&p->list, &m->patterns); } - if (mp_cnt != cp->pattern_count) { - err = mgmt_cmd_status(sk, hdev->id, - MGMT_OP_ADD_ADV_PATTERNS_MONITOR, - MGMT_STATUS_INVALID_PARAMS); - goto failed; + cmd = mgmt_pending_add(sk, MGMT_OP_ADD_ADV_PATTERNS_MONITOR, + hdev, data, len); + if (!cmd) { + status = MGMT_STATUS_NO_RESOURCES; + goto unlock; } - hci_dev_lock(hdev); - - prev_adv_monitors_cnt = hdev->adv_monitors_cnt; - - err = hci_add_adv_monitor(hdev, m); + pending = hci_add_adv_monitor(hdev, m, &err); if (err) { - if (err == -ENOSPC) { - mgmt_cmd_status(sk, hdev->id, - MGMT_OP_ADD_ADV_PATTERNS_MONITOR, - MGMT_STATUS_NO_RESOURCES); - } + if (err == -ENOSPC || err == -ENOMEM) + status = MGMT_STATUS_NO_RESOURCES; + else if (err == -EINVAL) + status = MGMT_STATUS_INVALID_PARAMS; + else + status = MGMT_STATUS_FAILED; + + mgmt_pending_remove(cmd); goto unlock; } - if (hdev->adv_monitors_cnt > prev_adv_monitors_cnt) + if (!pending) { + mgmt_pending_remove(cmd); + rp.monitor_handle = cpu_to_le16(m->handle); mgmt_adv_monitor_added(sk, hdev, m->handle); + m->state = ADV_MONITOR_STATE_REGISTERED; + hdev->adv_monitors_cnt++; - hci_dev_unlock(hdev); + hci_dev_unlock(hdev); + return mgmt_cmd_complete(sk, hdev->id, + MGMT_OP_ADD_ADV_PATTERNS_MONITOR, + MGMT_STATUS_SUCCESS, &rp, sizeof(rp)); + } - rp.monitor_handle = cpu_to_le16(m->handle); + hci_dev_unlock(hdev); - return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_ADV_PATTERNS_MONITOR, - MGMT_STATUS_SUCCESS, &rp, sizeof(rp)); + cmd->user_data = m; + return 0; unlock: hci_dev_unlock(hdev); - -failed: hci_free_adv_monitor(m); - return err; + return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADV_PATTERNS_MONITOR, + status); } static int remove_adv_monitor(struct sock *sk, struct hci_dev *hdev, diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c index 4b39534a14a1..e4b8fe71b9c3 100644 --- a/net/bluetooth/msft.c +++ b/net/bluetooth/msft.c @@ -5,9 +5,16 @@ #include #include +#include +#include "hci_request.h" +#include "mgmt_util.h" #include "msft.h" +#define MSFT_RSSI_THRESHOLD_VALUE_MIN -127 +#define MSFT_RSSI_THRESHOLD_VALUE_MAX 20 +#define MSFT_RSSI_LOW_TIMEOUT_MAX 0x3C + #define MSFT_OP_READ_SUPPORTED_FEATURES 0x00 struct msft_cp_read_supported_features { __u8 sub_opcode; @@ -21,12 +28,55 @@ struct msft_rp_read_supported_features { __u8 evt_prefix[]; } __packed; +#define MSFT_OP_LE_MONITOR_ADVERTISEMENT 0x03 +#define MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN 0x01 +struct msft_le_monitor_advertisement_pattern { + __u8 length; + __u8 data_type; + __u8 start_byte; + __u8 pattern[0]; +}; + +struct msft_le_monitor_advertisement_pattern_data { + __u8 count; + __u8 data[0]; +}; + +struct msft_cp_le_monitor_advertisement { + __u8 sub_opcode; + __s8 rssi_high; + __s8 rssi_low; + __u8 rssi_low_interval; + __u8 rssi_sampling_period; + __u8 cond_type; + __u8 data[0]; +} __packed; + +struct msft_rp_le_monitor_advertisement { + __u8 status; + __u8 sub_opcode; + __u8 handle; +} __packed; + +struct msft_monitor_advertisement_handle_data { + __u8 msft_handle; + __u16 mgmt_handle; + struct list_head list; +}; + struct msft_data { __u64 features; __u8 evt_prefix_len; __u8 *evt_prefix; + struct list_head handle_map; + __u16 pending_add_handle; }; +bool msft_monitor_supported(struct hci_dev *hdev) +{ + return !!(msft_get_features(hdev) & MSFT_FEATURE_MASK_LE_ADV_MONITOR); +} + static bool read_supported_features(struct hci_dev *hdev, struct msft_data *msft) { @@ -90,12 +140,14 @@ void msft_do_open(struct hci_dev *hdev) return; } + INIT_LIST_HEAD(&msft->handle_map); hdev->msft_data = msft; } void msft_do_close(struct hci_dev *hdev) { struct msft_data *msft = hdev->msft_data; + struct msft_monitor_advertisement_handle_data *handle_data, *tmp; if (!msft) return; @@ -104,6 +156,11 @@ void msft_do_close(struct hci_dev *hdev) hdev->msft_data = NULL; + list_for_each_entry_safe(handle_data, tmp, &msft->handle_map, list) { + list_del(&handle_data->list); + kfree(handle_data); + } + kfree(msft->evt_prefix); kfree(msft); } @@ -145,5 +202,147 @@ __u64 msft_get_features(struct hci_dev *hdev) { struct msft_data *msft = hdev->msft_data; - return msft ? msft->features : 0; + return msft ? msft->features : 0; +} + +static void msft_le_monitor_advertisement_cb(struct hci_dev *hdev, + u8 status, u16 opcode, + struct sk_buff *skb) +{ + struct msft_rp_le_monitor_advertisement *rp; + struct adv_monitor *monitor; + struct msft_monitor_advertisement_handle_data *handle_data; + struct msft_data *msft = hdev->msft_data; + + hci_dev_lock(hdev); + + monitor = idr_find(&hdev->adv_monitors_idr, msft->pending_add_handle); + if (!monitor) { + bt_dev_err(hdev, "msft add advmon: monitor %d is not found!", + msft->pending_add_handle); + status = HCI_ERROR_UNSPECIFIED; + goto unlock; + } + + if (status) + goto unlock; + + rp = (struct msft_rp_le_monitor_advertisement *)skb->data; + if (skb->len < sizeof(*rp)) { + status = HCI_ERROR_UNSPECIFIED; + goto unlock; + } + + handle_data = kmalloc(sizeof(*handle_data), GFP_KERNEL); + if (!handle_data) { + status = HCI_ERROR_UNSPECIFIED; + goto unlock; + } + + handle_data->mgmt_handle = monitor->handle; + handle_data->msft_handle = rp->handle; + INIT_LIST_HEAD(&handle_data->list); + list_add(&handle_data->list, &msft->handle_map); + + monitor->state = ADV_MONITOR_STATE_OFFLOADED; + +unlock: + if (status && monitor) { + idr_remove(&hdev->adv_monitors_idr, monitor->handle); + hci_free_adv_monitor(monitor); + } + + hci_dev_unlock(hdev); + + hci_add_adv_patterns_monitor_complete(hdev, status); +} + +static bool msft_monitor_rssi_valid(struct adv_monitor *monitor) +{ + struct adv_rssi_thresholds *r = &monitor->rssi; + + if (r->high_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN || + r->high_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX || + r->low_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN || + r->low_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX) + return false; + + /* High_threshold_timeout is not supported, + * once high_threshold is reached, events are immediately reported. + */ + if (r->high_threshold_timeout != 0) + return false; + + if (r->low_threshold_timeout > MSFT_RSSI_LOW_TIMEOUT_MAX) + return false; + + /* Sampling period from 0x00 to 0xFF are all allowed */ + return true; +} + +static bool msft_monitor_pattern_valid(struct adv_monitor *monitor) +{ + return msft_monitor_rssi_valid(monitor); + /* No additional check needed for pattern-based monitor */ +} + +/* This function requires the caller holds hdev->lock */ +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; + struct msft_le_monitor_advertisement_pattern *pattern; + struct adv_pattern *entry; + struct hci_request req; + struct msft_data *msft = hdev->msft_data; + size_t total_size = sizeof(*cp) + sizeof(*pattern_data); + ptrdiff_t offset = 0; + u8 pattern_count = 0; + int err = 0; + + if (!msft) + return -EOPNOTSUPP; + + if (!msft_monitor_pattern_valid(monitor)) + return -EINVAL; + + list_for_each_entry(entry, &monitor->patterns, list) { + pattern_count++; + total_size += sizeof(*pattern) + entry->length; + } + + cp = kmalloc(total_size, GFP_KERNEL); + if (!cp) + return -ENOMEM; + + cp->sub_opcode = MSFT_OP_LE_MONITOR_ADVERTISEMENT; + cp->rssi_high = monitor->rssi.high_threshold; + cp->rssi_low = monitor->rssi.low_threshold; + cp->rssi_low_interval = (u8)monitor->rssi.low_threshold_timeout; + cp->rssi_sampling_period = monitor->rssi.sampling_period; + + cp->cond_type = MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN; + + pattern_data = (void *)cp->data; + pattern_data->count = pattern_count; + + list_for_each_entry(entry, &monitor->patterns, list) { + pattern = (void *)(pattern_data->data + offset); + /* the length also includes data_type and offset */ + pattern->length = entry->length + 2; + pattern->data_type = entry->ad_type; + pattern->start_byte = entry->offset; + memcpy(pattern->pattern, entry->value, entry->length); + offset += sizeof(*pattern) + entry->length; + } + + hci_req_init(&req, hdev); + hci_req_add(&req, hdev->msft_opcode, total_size, cp); + err = hci_req_run_skb(&req, msft_le_monitor_advertisement_cb); + kfree(cp); + + if (!err) + msft->pending_add_handle = monitor->handle; + + return err; } diff --git a/net/bluetooth/msft.h b/net/bluetooth/msft.h index e9c478e890b8..0ac9b15322b1 100644 --- a/net/bluetooth/msft.h +++ b/net/bluetooth/msft.h @@ -12,16 +12,28 @@ #if IS_ENABLED(CONFIG_BT_MSFTEXT) +bool msft_monitor_supported(struct hci_dev *hdev); void msft_do_open(struct hci_dev *hdev); void msft_do_close(struct hci_dev *hdev); void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb); __u64 msft_get_features(struct hci_dev *hdev); +int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor); #else +static inline bool msft_monitor_supported(struct hci_dev *hdev) +{ + return false; +} + static inline void msft_do_open(struct hci_dev *hdev) {} static inline void msft_do_close(struct hci_dev *hdev) {} static inline void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb) {} static inline __u64 msft_get_features(struct hci_dev *hdev) { return 0; } +static inline int msft_add_monitor_pattern(struct hci_dev *hdev, + struct adv_monitor *monitor) +{ + return -EOPNOTSUPP; +} #endif