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Subject[PATCH 3/6] Bluetooth: Use intervals and tx power from mgmt cmds
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This patch takes the min/max intervals and tx power optionally provided
in mgmt interface, stores them in the advertisement struct, and uses
them when configuring the hci requests. While tx power is not used if
extended advertising is unavailable, software rotation will use the min
and max advertising intervals specified by the client.

This change is validated manually by ensuring the min/max intervals are
propagated to the controller on both hatch (extended advertising) and
kukui (no extended advertising) chromebooks, and that tx power is
propagated correctly on hatch. These tests are performed with multiple
advertisements simultaneously.

Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
---

include/net/bluetooth/hci_core.h | 5 ++++-
net/bluetooth/hci_core.c | 8 +++++---
net/bluetooth/hci_request.c | 29 +++++++++++++++++++----------
net/bluetooth/mgmt.c | 8 ++++++--
4 files changed, 34 insertions(+), 16 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 48d144ae8b57d6..ab168f46b6d909 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -230,6 +230,8 @@ struct adv_info {
__u16 scan_rsp_len;
__u8 scan_rsp_data[HCI_MAX_AD_LENGTH];
__s8 tx_power;
+ __u32 min_interval;
+ __u32 max_interval;
bdaddr_t random_addr;
bool rpa_expired;
struct delayed_work rpa_expired_cb;
@@ -1292,7 +1294,8 @@ struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
u16 adv_data_len, u8 *adv_data,
u16 scan_rsp_len, u8 *scan_rsp_data,
- u16 timeout, u16 duration);
+ u16 timeout, u16 duration, s8 tx_power,
+ u32 min_interval, u32 max_interval);
int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
u16 adv_data_len, u8 *adv_data,
u16 scan_rsp_len, u8 *scan_rsp_data);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 3f73f147826409..3a2332f4a9bba2 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2951,7 +2951,8 @@ static void adv_instance_rpa_expired(struct work_struct *work)
int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
u16 adv_data_len, u8 *adv_data,
u16 scan_rsp_len, u8 *scan_rsp_data,
- u16 timeout, u16 duration)
+ u16 timeout, u16 duration, s8 tx_power,
+ u32 min_interval, u32 max_interval)
{
struct adv_info *adv_instance;

@@ -2979,6 +2980,9 @@ int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
adv_instance->flags = flags;
adv_instance->adv_data_len = adv_data_len;
adv_instance->scan_rsp_len = scan_rsp_len;
+ adv_instance->min_interval = min_interval;
+ adv_instance->max_interval = max_interval;
+ adv_instance->tx_power = tx_power;

if (adv_data_len)
memcpy(adv_instance->adv_data, adv_data, adv_data_len);
@@ -2995,8 +2999,6 @@ int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
else
adv_instance->duration = duration;

- adv_instance->tx_power = HCI_TX_POWER_INVALID;
-
INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
adv_instance_rpa_expired);

diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index e17bc8a1c66ddd..30bf0d0e406d9a 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -1370,6 +1370,7 @@ static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
void __hci_req_enable_advertising(struct hci_request *req)
{
struct hci_dev *hdev = req->hdev;
+ struct adv_info *adv_instance;
struct hci_cp_le_set_adv_param cp;
u8 own_addr_type, enable = 0x01;
bool connectable;
@@ -1377,6 +1378,7 @@ void __hci_req_enable_advertising(struct hci_request *req)
u32 flags;

flags = get_adv_instance_flags(hdev, hdev->cur_adv_instance);
+ adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);

/* If the "connectable" instance flag was not set, then choose between
* ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
@@ -1408,11 +1410,16 @@ void __hci_req_enable_advertising(struct hci_request *req)

memset(&cp, 0, sizeof(cp));

- if (connectable) {
- cp.type = LE_ADV_IND;
-
+ if (adv_instance) {
+ adv_min_interval = adv_instance->min_interval;
+ adv_max_interval = adv_instance->max_interval;
+ } else {
adv_min_interval = hdev->le_adv_min_interval;
adv_max_interval = hdev->le_adv_max_interval;
+ }
+
+ if (connectable) {
+ cp.type = LE_ADV_IND;
} else {
if (get_cur_adv_instance_scan_rsp_len(hdev))
cp.type = LE_ADV_SCAN_IND;
@@ -1423,9 +1430,6 @@ void __hci_req_enable_advertising(struct hci_request *req)
hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
- } else {
- adv_min_interval = hdev->le_adv_min_interval;
- adv_max_interval = hdev->le_adv_max_interval;
}
}

@@ -1942,9 +1946,15 @@ int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance)

memset(&cp, 0, sizeof(cp));

- /* In ext adv set param interval is 3 octets */
- hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
- hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
+ if (adv_instance) {
+ hci_cpu_to_le24(adv_instance->min_interval, cp.min_interval);
+ hci_cpu_to_le24(adv_instance->max_interval, cp.max_interval);
+ cp.tx_power = adv_instance->tx_power;
+ } else {
+ hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
+ hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
+ cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
+ }

secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);

@@ -1967,7 +1977,6 @@ int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance)

cp.own_addr_type = own_addr_type;
cp.channel_map = hdev->le_adv_channel_map;
- cp.tx_power = 127;
cp.handle = instance;

if (flags & MGMT_ADV_FLAG_SEC_2M) {
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 421b6784a114f9..717c97affb1554 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -7524,7 +7524,10 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
cp->adv_data_len, cp->data,
cp->scan_rsp_len,
cp->data + cp->adv_data_len,
- timeout, duration);
+ timeout, duration,
+ HCI_ADV_TX_POWER_NO_PREFERENCE,
+ hdev->le_adv_min_interval,
+ hdev->le_adv_max_interval);
if (err < 0) {
err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
MGMT_STATUS_FAILED);
@@ -7722,7 +7725,8 @@ static int add_ext_adv_params(struct sock *sk, struct hci_dev *hdev,

/* Create advertising instance with no advertising or response data */
err = hci_add_adv_instance(hdev, cp->instance, flags,
- 0, NULL, 0, NULL, timeout, duration);
+ 0, NULL, 0, NULL, timeout, duration,
+ tx_power, min_interval, max_interval);

if (err < 0) {
err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_PARAMS,
--
2.28.0.618.gf4bc123cb7-goog
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