From 258f56d11bbbf39df5bc5faf0119d28be528f27d Mon Sep 17 00:00:00 2001 From: Joseph Hwang Date: Tue, 2 Nov 2021 15:19:29 +0800 Subject: [PATCH] Bluetooth: aosp: Support AOSP Bluetooth Quality Report This patch adds the support of the AOSP Bluetooth Quality Report (BQR) events. Multiple vendors have supported the AOSP Bluetooth Quality Report. When a Bluetooth controller supports the capability, it can enable the aosp capability through hci_set_aosp_capable. Then hci_core will set up the hdev->aosp_set_quality_report callback through aosp_do_open if the controller responds to support the quality report capability. Note that Intel also supports a distinct telemetry quality report specification. Intel sets up the hdev->set_quality_report callback in the btusb driver module. Reviewed-by: Miao-chen Chou Signed-off-by: Joseph Hwang Signed-off-by: Marcel Holtmann --- net/bluetooth/aosp.c | 87 ++++++++++++++++++++++++++++++++++++++++++++ net/bluetooth/aosp.h | 13 +++++++ net/bluetooth/mgmt.c | 17 ++++++--- 3 files changed, 112 insertions(+), 5 deletions(-) diff --git a/net/bluetooth/aosp.c b/net/bluetooth/aosp.c index 871e889b7e17..432ae3aac9e3 100644 --- a/net/bluetooth/aosp.c +++ b/net/bluetooth/aosp.c @@ -112,3 +112,90 @@ void aosp_do_close(struct hci_dev *hdev) bt_dev_dbg(hdev, "Cleanup of AOSP extension"); } + +/* BQR command */ +#define BQR_OPCODE hci_opcode_pack(0x3f, 0x015e) + +/* BQR report action */ +#define REPORT_ACTION_ADD 0x00 +#define REPORT_ACTION_DELETE 0x01 +#define REPORT_ACTION_CLEAR 0x02 + +/* BQR event masks */ +#define QUALITY_MONITORING BIT(0) +#define APPRAOCHING_LSTO BIT(1) +#define A2DP_AUDIO_CHOPPY BIT(2) +#define SCO_VOICE_CHOPPY BIT(3) + +#define DEFAULT_BQR_EVENT_MASK (QUALITY_MONITORING | APPRAOCHING_LSTO | \ + A2DP_AUDIO_CHOPPY | SCO_VOICE_CHOPPY) + +/* Reporting at milliseconds so as not to stress the controller too much. + * Range: 0 ~ 65535 ms + */ +#define DEFALUT_REPORT_INTERVAL_MS 5000 + +struct aosp_bqr_cp { + __u8 report_action; + __u32 event_mask; + __u16 min_report_interval; +} __packed; + +static int enable_quality_report(struct hci_dev *hdev) +{ + struct sk_buff *skb; + struct aosp_bqr_cp cp; + + cp.report_action = REPORT_ACTION_ADD; + cp.event_mask = DEFAULT_BQR_EVENT_MASK; + cp.min_report_interval = DEFALUT_REPORT_INTERVAL_MS; + + skb = __hci_cmd_sync(hdev, BQR_OPCODE, sizeof(cp), &cp, + HCI_CMD_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Enabling Android BQR failed (%ld)", + PTR_ERR(skb)); + return PTR_ERR(skb); + } + + kfree_skb(skb); + return 0; +} + +static int disable_quality_report(struct hci_dev *hdev) +{ + struct sk_buff *skb; + struct aosp_bqr_cp cp = { 0 }; + + cp.report_action = REPORT_ACTION_CLEAR; + + skb = __hci_cmd_sync(hdev, BQR_OPCODE, sizeof(cp), &cp, + HCI_CMD_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Disabling Android BQR failed (%ld)", + PTR_ERR(skb)); + return PTR_ERR(skb); + } + + kfree_skb(skb); + return 0; +} + +bool aosp_has_quality_report(struct hci_dev *hdev) +{ + return hdev->aosp_quality_report; +} + +int aosp_set_quality_report(struct hci_dev *hdev, bool enable) +{ + if (!aosp_has_quality_report(hdev)) + return -EOPNOTSUPP; + + bt_dev_dbg(hdev, "quality report enable %d", enable); + + /* Enable or disable the quality report feature. */ + if (enable) + return enable_quality_report(hdev); + else + return disable_quality_report(hdev); +} diff --git a/net/bluetooth/aosp.h b/net/bluetooth/aosp.h index 328fc6d39f70..2fd8886d51b2 100644 --- a/net/bluetooth/aosp.h +++ b/net/bluetooth/aosp.h @@ -8,9 +8,22 @@ void aosp_do_open(struct hci_dev *hdev); void aosp_do_close(struct hci_dev *hdev); +bool aosp_has_quality_report(struct hci_dev *hdev); +int aosp_set_quality_report(struct hci_dev *hdev, bool enable); + #else static inline void aosp_do_open(struct hci_dev *hdev) {} static inline void aosp_do_close(struct hci_dev *hdev) {} +static inline bool aosp_has_quality_report(struct hci_dev *hdev) +{ + return false; +} + +static inline int aosp_set_quality_report(struct hci_dev *hdev, bool enable) +{ + return -EOPNOTSUPP; +} + #endif diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index a7d35c138713..06384d761928 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -39,6 +39,7 @@ #include "mgmt_config.h" #include "msft.h" #include "eir.h" +#include "aosp.h" #define MGMT_VERSION 1 #define MGMT_REVISION 21 @@ -3934,7 +3935,8 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, idx++; } - if (hdev && hdev->set_quality_report) { + if (hdev && (aosp_has_quality_report(hdev) || + hdev->set_quality_report)) { if (hci_dev_test_flag(hdev, HCI_QUALITY_REPORT)) flags = BIT(0); else @@ -4198,7 +4200,7 @@ static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev, val = !!cp->param[0]; changed = (val != hci_dev_test_flag(hdev, HCI_QUALITY_REPORT)); - if (!hdev->set_quality_report) { + if (!aosp_has_quality_report(hdev) && !hdev->set_quality_report) { err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_EXP_FEATURE, MGMT_STATUS_NOT_SUPPORTED); @@ -4206,13 +4208,18 @@ static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev, } if (changed) { - err = hdev->set_quality_report(hdev, val); + if (hdev->set_quality_report) + err = hdev->set_quality_report(hdev, val); + else + err = aosp_set_quality_report(hdev, val); + if (err) { err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_EXP_FEATURE, MGMT_STATUS_FAILED); goto unlock_quality_report; } + if (val) hci_dev_set_flag(hdev, HCI_QUALITY_REPORT); else @@ -4224,8 +4231,8 @@ static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev, memcpy(rp.uuid, quality_report_uuid, 16); rp.flags = cpu_to_le32(val ? BIT(0) : 0); hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS); - err = mgmt_cmd_complete(sk, hdev->id, - MGMT_OP_SET_EXP_FEATURE, 0, + + err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_EXP_FEATURE, 0, &rp, sizeof(rp)); if (changed)