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Bluetooth: aosp: Support AOSP Bluetooth Quality Report

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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 <mcchou@chromium.org>
Signed-off-by: Joseph Hwang <josephsih@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Joseph Hwang 2021-11-02 15:19:29 +08:00 committed by Marcel Holtmann
parent 749a6c5942
commit 258f56d11b
3 changed files with 112 additions and 5 deletions
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87
net/bluetooth/aosp.c
View File

@ -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);
}

13
net/bluetooth/aosp.h
View File

@ -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

15
net/bluetooth/mgmt.c
View File

@ -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) {
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)