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Message-Id: <20211021230356.v6.2.Iaa4a0269e51d8e8d8784a6ac8e05899b49a1377d@changeid>
Date: Thu, 21 Oct 2021 23:04:24 +0800
From: Joseph Hwang <josephsih@...omium.org>
To: linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
luiz.dentz@...il.com, pali@...nel.org
Cc: chromeos-bluetooth-upstreaming@...omium.org, josephsih@...gle.com,
Joseph Hwang <josephsih@...omium.org>,
Miao-chen Chou <mcchou@...omium.org>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Johan Hedberg <johan.hedberg@...il.com>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v6 2/3] 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 <mcchou@...omium.org>
Signed-off-by: Joseph Hwang <josephsih@...omium.org>
---
Changes in v6:
- Use the decimal version instead of hexadecimal version to be
consistent with the AOSP specification.
- Move the code of checking the bluetooth_quality_report_support field
to the previous patch.
Changes in v5:
- Fix the patch per
[RFC PATCH] Bluetooth: Add framework for AOSP quality report setting
- Declare aosp_set_quality_report.
- Use aosp_do_open() to set hdev->aosp_set_quality_report.
- Add aosp_has_quality_report().
- In mgmt, use hdev->aosp_set_quality_report and
hdev->set_quality_report separately.
Changes in v4:
- Move the AOSP BQR support from the driver level to net/bluetooth/aosp.
- Fix the drivers to use hci_set_aosp_capable to enable aosp.
- Add Mediatek to support the capability too.
Changes in v3:
- Fix the auto build test ERROR
"undefined symbol: btandroid_set_quality_report" that occurred
with some kernel configs.
- Note that the mgmt-tester "Read Exp Feature - Success" failed.
But on my test device, the same test passed. Please kindly let me
know what may be going wrong. These patches do not actually
modify read/set experimental features.
- As to CheckPatch failed. No need to modify the MAINTAINERS file.
Thanks.
Changes in v2:
- Fix the titles of patches 2/3 and 3/3 and reduce their lengths.
net/bluetooth/aosp.c | 87 ++++++++++++++++++++++++++++++++++++++++++++
net/bluetooth/aosp.h | 13 +++++++
net/bluetooth/mgmt.c | 18 ++++++---
3 files changed, 113 insertions(+), 5 deletions(-)
diff --git a/net/bluetooth/aosp.c b/net/bluetooth/aosp.c
index 64684b2bf79b..582c380a29fa 100644
--- a/net/bluetooth/aosp.c
+++ b/net/bluetooth/aosp.c
@@ -147,3 +147,90 @@ 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 44683443300c..d6c322763567 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
@@ -3863,7 +3864,8 @@ 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
@@ -4127,7 +4129,8 @@ 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) {
+ BT_INFO("quality report not supported");
err = mgmt_cmd_status(sk, hdev->id,
MGMT_OP_SET_EXP_FEATURE,
MGMT_STATUS_NOT_SUPPORTED);
@@ -4135,13 +4138,18 @@ 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
@@ -4153,8 +4161,8 @@ 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)
--
2.33.0.1079.g6e70778dc9-goog
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