* [PATCH v2 1/6] Bluetooth: Add helper to set adv data
2020-09-17 22:22 [PATCH v2 0/6] Bluetooth: Add new MGMT interface for advertising add Daniel Winkler
@ 2020-09-17 22:22 ` Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 2/6] Bluetooth: Break add adv into two mgmt commands Daniel Winkler
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Daniel Winkler @ 2020-09-17 22:22 UTC (permalink / raw)
To: marcel
Cc: chromeos-bluetooth-upstreaming, linux-bluetooth, Daniel Winkler,
Sonny Sasaka, David S. Miller, Jakub Kicinski, Johan Hedberg,
linux-kernel, netdev
We wish to handle advertising data separately from advertising
parameters in our new MGMT requests. This change adds a helper that
allows the advertising data and scan response to be updated for an
existing advertising instance.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
---
Changes in v2: None
include/net/bluetooth/hci_core.h | 3 +++
net/bluetooth/hci_core.c | 31 +++++++++++++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 9873e1c8cd163b..300b3572d479e1 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1291,6 +1291,9 @@ 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);
+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);
int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 8a2645a8330137..3f73f147826409 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3005,6 +3005,37 @@ int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
return 0;
}
+/* This function requires the caller holds hdev->lock */
+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)
+{
+ struct adv_info *adv_instance;
+
+ adv_instance = hci_find_adv_instance(hdev, instance);
+
+ /* If advertisement doesn't exist, we can't modify its data */
+ if (!adv_instance)
+ return -ENOENT;
+
+ if (adv_data_len) {
+ memset(adv_instance->adv_data, 0,
+ sizeof(adv_instance->adv_data));
+ memcpy(adv_instance->adv_data, adv_data, adv_data_len);
+ adv_instance->adv_data_len = adv_data_len;
+ }
+
+ if (scan_rsp_len) {
+ memset(adv_instance->scan_rsp_data, 0,
+ sizeof(adv_instance->scan_rsp_data));
+ memcpy(adv_instance->scan_rsp_data,
+ scan_rsp_data, scan_rsp_len);
+ adv_instance->scan_rsp_len = scan_rsp_len;
+ }
+
+ return 0;
+}
+
/* This function requires the caller holds hdev->lock */
void hci_adv_monitors_clear(struct hci_dev *hdev)
{
--
2.28.0.681.g6f77f65b4e-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v2 2/6] Bluetooth: Break add adv into two mgmt commands
2020-09-17 22:22 [PATCH v2 0/6] Bluetooth: Add new MGMT interface for advertising add Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 1/6] Bluetooth: Add helper to set adv data Daniel Winkler
@ 2020-09-17 22:22 ` Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 3/6] Bluetooth: Use intervals and tx power from mgmt cmds Daniel Winkler
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Daniel Winkler @ 2020-09-17 22:22 UTC (permalink / raw)
To: marcel
Cc: chromeos-bluetooth-upstreaming, linux-bluetooth, Daniel Winkler,
Sonny Sasaka, David S. Miller, Jakub Kicinski, Johan Hedberg,
linux-kernel, netdev
This patch adds support for the new advertising add interface, with the
first command setting advertising parameters and the second to set
advertising data. The set parameters command allows the caller to leave
some fields "unset", with a params bitfield defining which params were
purposefully set. Unset parameters will be given defaults when calling
hci_add_adv_instance. The data passed to the param mgmt command is
allowed to be flexible, so in the future if bluetoothd passes a larger
structure with new params, the mgmt command will ignore the unknown
members at the end.
This change has been validated on both hatch (extended advertising) and
kukui (no extended advertising) chromebooks running bluetoothd that
support this new interface. I ran the following manual tests:
- Set several (3) advertisements using modified test_advertisement.py
- For each, validate correct data and parameters in btmon trace
- Verified both for software rotation and extended adv
Automatic test suite also run, testing many (25) scenarios of single and
multi-advertising for data/parameter correctness.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
---
Changes in v2: None
include/net/bluetooth/hci_core.h | 2 +
include/net/bluetooth/mgmt.h | 33 +++
net/bluetooth/mgmt.c | 364 ++++++++++++++++++++++++++++++-
3 files changed, 388 insertions(+), 11 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 300b3572d479e1..48d144ae8b57d6 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -238,6 +238,8 @@ struct adv_info {
#define HCI_MAX_ADV_INSTANCES 5
#define HCI_DEFAULT_ADV_DURATION 2
+#define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
+
struct adv_pattern {
struct list_head list;
__u8 ad_type;
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 6b55155e05e977..859f0d3cd6ea38 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -782,6 +782,39 @@ struct mgmt_rp_remove_adv_monitor {
__le16 monitor_handle;
} __packed;
+#define MGMT_ADV_PARAM_DURATION BIT(0)
+#define MGMT_ADV_PARAM_TIMEOUT BIT(1)
+#define MGMT_ADV_PARAM_INTERVALS BIT(2)
+#define MGMT_ADV_PARAM_TX_POWER BIT(3)
+
+#define MGMT_OP_ADD_EXT_ADV_PARAMS 0x0054
+struct mgmt_cp_add_ext_adv_params {
+ __u8 instance;
+ __le32 flags;
+ __le16 params;
+ __le16 duration;
+ __le16 timeout;
+ __le32 min_interval;
+ __le32 max_interval;
+ __s8 tx_power;
+} __packed;
+#define MGMT_ADD_EXT_ADV_PARAMS_MIN_SIZE 20
+struct mgmt_rp_add_ext_adv_params {
+ __u8 instance;
+} __packed;
+
+#define MGMT_OP_ADD_EXT_ADV_DATA 0x0055
+struct mgmt_cp_add_ext_adv_data {
+ __u8 instance;
+ __u8 adv_data_len;
+ __u8 scan_rsp_len;
+ __u8 data[];
+} __packed;
+#define MGMT_ADD_EXT_ADV_DATA_SIZE 3
+struct mgmt_rp_add_ext_adv_data {
+ __u8 instance;
+} __packed;
+
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 0b711ad80f6bd1..421b6784a114f9 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -122,6 +122,8 @@ static const u16 mgmt_commands[] = {
MGMT_OP_READ_ADV_MONITOR_FEATURES,
MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
MGMT_OP_REMOVE_ADV_MONITOR,
+ MGMT_OP_ADD_EXT_ADV_PARAMS,
+ MGMT_OP_ADD_EXT_ADV_DATA,
};
static const u16 mgmt_events[] = {
@@ -7372,6 +7374,31 @@ static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
return true;
}
+static bool requested_adv_flags_are_valid(struct hci_dev *hdev, u32 adv_flags)
+{
+ u32 supported_flags, phy_flags;
+
+ /* The current implementation only supports a subset of the specified
+ * flags. Also need to check mutual exclusiveness of sec flags.
+ */
+ supported_flags = get_supported_adv_flags(hdev);
+ phy_flags = adv_flags & MGMT_ADV_FLAG_SEC_MASK;
+ if (adv_flags & ~supported_flags ||
+ ((phy_flags && (phy_flags ^ (phy_flags & -phy_flags)))))
+ return false;
+
+ return true;
+}
+
+static bool adv_busy(struct hci_dev *hdev)
+{
+ return (pending_find(MGMT_OP_ADD_ADVERTISING, hdev) ||
+ pending_find(MGMT_OP_REMOVE_ADVERTISING, hdev) ||
+ pending_find(MGMT_OP_SET_LE, hdev) ||
+ pending_find(MGMT_OP_ADD_EXT_ADV_PARAMS, hdev) ||
+ pending_find(MGMT_OP_ADD_EXT_ADV_DATA, hdev));
+}
+
static void add_advertising_complete(struct hci_dev *hdev, u8 status,
u16 opcode)
{
@@ -7386,6 +7413,8 @@ static void add_advertising_complete(struct hci_dev *hdev, u8 status,
hci_dev_lock(hdev);
cmd = pending_find(MGMT_OP_ADD_ADVERTISING, hdev);
+ if (!cmd)
+ cmd = pending_find(MGMT_OP_ADD_EXT_ADV_DATA, hdev);
list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
if (!adv_instance->pending)
@@ -7430,7 +7459,6 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
struct mgmt_cp_add_advertising *cp = data;
struct mgmt_rp_add_advertising rp;
u32 flags;
- u32 supported_flags, phy_flags;
u8 status;
u16 timeout, duration;
unsigned int prev_instance_cnt = hdev->adv_instance_cnt;
@@ -7466,13 +7494,7 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
timeout = __le16_to_cpu(cp->timeout);
duration = __le16_to_cpu(cp->duration);
- /* The current implementation only supports a subset of the specified
- * flags. Also need to check mutual exclusiveness of sec flags.
- */
- supported_flags = get_supported_adv_flags(hdev);
- phy_flags = flags & MGMT_ADV_FLAG_SEC_MASK;
- if (flags & ~supported_flags ||
- ((phy_flags && (phy_flags ^ (phy_flags & -phy_flags)))))
+ if (!requested_adv_flags_are_valid(hdev, flags))
return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
MGMT_STATUS_INVALID_PARAMS);
@@ -7484,9 +7506,7 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
goto unlock;
}
- if (pending_find(MGMT_OP_ADD_ADVERTISING, hdev) ||
- pending_find(MGMT_OP_REMOVE_ADVERTISING, hdev) ||
- pending_find(MGMT_OP_SET_LE, hdev)) {
+ if (adv_busy(hdev)) {
err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
MGMT_STATUS_BUSY);
goto unlock;
@@ -7577,6 +7597,324 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
return err;
}
+static void add_ext_adv_params_complete(struct hci_dev *hdev, u8 status,
+ u16 opcode)
+{
+ struct mgmt_pending_cmd *cmd;
+ struct mgmt_cp_add_ext_adv_params *cp;
+ struct mgmt_rp_add_ext_adv_params rp;
+ struct adv_info *adv_instance;
+
+ BT_DBG("%s", hdev->name);
+
+ hci_dev_lock(hdev);
+
+ cmd = pending_find(MGMT_OP_ADD_EXT_ADV_PARAMS, hdev);
+
+ if (!cmd)
+ goto unlock;
+
+ cp = cmd->param;
+ rp.instance = cp->instance;
+
+ if (status) {
+ adv_instance = hci_find_adv_instance(hdev, cp->instance);
+
+ /* If this advertisement was previously advertising and we
+ * failed to update it, we signal that it has been removed and
+ * delete its structure
+ */
+ if (!adv_instance->pending)
+ mgmt_advertising_removed(cmd->sk, hdev, cp->instance);
+
+ hci_remove_adv_instance(hdev, cp->instance);
+
+ mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode,
+ mgmt_status(status));
+
+ } else {
+ mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
+ mgmt_status(status), &rp, sizeof(rp));
+ }
+
+ mgmt_pending_remove(cmd);
+
+unlock:
+ hci_dev_unlock(hdev);
+}
+
+static int add_ext_adv_params(struct sock *sk, struct hci_dev *hdev,
+ void *data, u16 data_len)
+{
+ struct mgmt_cp_add_ext_adv_params *cp = data;
+ struct mgmt_rp_add_ext_adv_params rp;
+ struct mgmt_pending_cmd *cmd = NULL;
+ struct adv_info *adv_instance;
+ struct hci_request req;
+ u32 flags, min_interval, max_interval;
+ u16 params, timeout, duration;
+ u8 status;
+ s8 tx_power;
+ int err;
+
+ BT_DBG("%s", hdev->name);
+
+ status = mgmt_le_support(hdev);
+ if (status)
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_PARAMS,
+ status);
+
+ if (cp->instance < 1 || cp->instance > hdev->le_num_of_adv_sets)
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_PARAMS,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ /* The purpose of breaking add_advertising into two separate MGMT calls
+ * for params and data is to allow more parameters to be added to this
+ * structure in the future. For this reason, we verify that we have the
+ * bare minimum structure we know of when the interface was defined. Any
+ * extra parameters we don't know about will be ignored in this request.
+ */
+ if (data_len < MGMT_ADD_EXT_ADV_PARAMS_MIN_SIZE)
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ flags = __le32_to_cpu(cp->flags);
+ params = __le16_to_cpu(cp->params);
+
+ if (!requested_adv_flags_are_valid(hdev, flags))
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_PARAMS,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ hci_dev_lock(hdev);
+
+ /* In new interface, we require that we are powered to register */
+ if (!hdev_is_powered(hdev)) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_PARAMS,
+ MGMT_STATUS_REJECTED);
+ goto unlock;
+ }
+
+ if (adv_busy(hdev)) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_PARAMS,
+ MGMT_STATUS_BUSY);
+ goto unlock;
+ }
+
+ /* Parse defined parameters from request, use defaults otherwise */
+ timeout = (params & MGMT_ADV_PARAM_TIMEOUT) ?
+ __le16_to_cpu(cp->timeout) : 0;
+
+ duration = (params & MGMT_ADV_PARAM_DURATION) ?
+ __le16_to_cpu(cp->duration) :
+ hdev->def_multi_adv_rotation_duration;
+
+ min_interval = (params & MGMT_ADV_PARAM_INTERVALS) ?
+ __le32_to_cpu(cp->min_interval) :
+ hdev->le_adv_min_interval;
+
+ max_interval = (params & MGMT_ADV_PARAM_INTERVALS) ?
+ __le32_to_cpu(cp->max_interval) :
+ hdev->le_adv_max_interval;
+
+ tx_power = (params & MGMT_ADV_PARAM_INTERVALS) ?
+ cp->tx_power :
+ HCI_ADV_TX_POWER_NO_PREFERENCE;
+
+ /* Create advertising instance with no advertising or response data */
+ err = hci_add_adv_instance(hdev, cp->instance, flags,
+ 0, NULL, 0, NULL, timeout, duration);
+
+ if (err < 0) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_PARAMS,
+ MGMT_STATUS_FAILED);
+ goto unlock;
+ }
+
+ hdev->cur_adv_instance = cp->instance;
+ /* Submit request for advertising params if ext adv available */
+ if (ext_adv_capable(hdev)) {
+ hci_req_init(&req, hdev);
+ adv_instance = hci_find_adv_instance(hdev, cp->instance);
+
+ /* Updating parameters of an active instance will return a
+ * Command Disallowed error, so we must first disable the
+ * instance if it is active.
+ */
+ if (!adv_instance->pending)
+ __hci_req_disable_ext_adv_instance(&req, cp->instance);
+
+ __hci_req_setup_ext_adv_instance(&req, cp->instance);
+
+ err = hci_req_run(&req, add_ext_adv_params_complete);
+
+ if (!err)
+ cmd = mgmt_pending_add(sk, MGMT_OP_ADD_EXT_ADV_PARAMS,
+ hdev, data, data_len);
+ if (!cmd) {
+ err = -ENOMEM;
+ hci_remove_adv_instance(hdev, cp->instance);
+ goto unlock;
+ }
+
+ } else {
+ rp.instance = cp->instance;
+ err = mgmt_cmd_complete(sk, hdev->id,
+ MGMT_OP_ADD_EXT_ADV_PARAMS,
+ MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
+ }
+
+unlock:
+ hci_dev_unlock(hdev);
+
+ return err;
+}
+
+static int add_ext_adv_data(struct sock *sk, struct hci_dev *hdev, void *data,
+ u16 data_len)
+{
+ struct mgmt_cp_add_ext_adv_data *cp = data;
+ struct mgmt_rp_add_ext_adv_data rp;
+ u8 schedule_instance = 0;
+ struct adv_info *next_instance;
+ struct adv_info *adv_instance;
+ int err = 0;
+ struct mgmt_pending_cmd *cmd;
+ struct hci_request req;
+
+ BT_DBG("%s", hdev->name);
+
+ hci_dev_lock(hdev);
+
+ adv_instance = hci_find_adv_instance(hdev, cp->instance);
+
+ if (!adv_instance) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_DATA,
+ MGMT_STATUS_INVALID_PARAMS);
+ goto unlock;
+ }
+
+ /* In new interface, we require that we are powered to register */
+ if (!hdev_is_powered(hdev)) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_DATA,
+ MGMT_STATUS_REJECTED);
+ goto clear_new_instance;
+ }
+
+ if (adv_busy(hdev)) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_DATA,
+ MGMT_STATUS_BUSY);
+ goto clear_new_instance;
+ }
+
+ /* Validate new data */
+ if (!tlv_data_is_valid(hdev, adv_instance->flags, cp->data,
+ cp->adv_data_len, true) ||
+ !tlv_data_is_valid(hdev, adv_instance->flags, cp->data +
+ cp->adv_data_len, cp->scan_rsp_len, false)) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_DATA,
+ MGMT_STATUS_INVALID_PARAMS);
+ goto clear_new_instance;
+ }
+
+ /* Set the data in the advertising instance */
+ hci_set_adv_instance_data(hdev, cp->instance, cp->adv_data_len,
+ cp->data, cp->scan_rsp_len,
+ cp->data + cp->adv_data_len);
+
+ /* We're good to go, update advertising data, parameters, and start
+ * advertising.
+ */
+
+ hci_req_init(&req, hdev);
+
+ hci_req_add(&req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
+
+ if (ext_adv_capable(hdev)) {
+ __hci_req_update_adv_data(&req, cp->instance);
+ __hci_req_update_scan_rsp_data(&req, cp->instance);
+ __hci_req_enable_ext_advertising(&req, cp->instance);
+
+ } else {
+ /* If using software rotation, determine next instance to use */
+
+ if (hdev->cur_adv_instance == cp->instance) {
+ /* If the currently advertised instance is being changed
+ * then cancel the current advertising and schedule the
+ * next instance. If there is only one instance then the
+ * overridden advertising data will be visible right
+ * away
+ */
+ cancel_adv_timeout(hdev);
+
+ next_instance = hci_get_next_instance(hdev,
+ cp->instance);
+ if (next_instance)
+ schedule_instance = next_instance->instance;
+ } else if (!hdev->adv_instance_timeout) {
+ /* Immediately advertise the new instance if no other
+ * instance is currently being advertised.
+ */
+ schedule_instance = cp->instance;
+ }
+
+ /* If the HCI_ADVERTISING flag is set or there is no instance to
+ * be advertised then we have no HCI communication to make.
+ * Simply return.
+ */
+ if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
+ !schedule_instance) {
+ if (adv_instance->pending) {
+ mgmt_advertising_added(sk, hdev, cp->instance);
+ adv_instance->pending = false;
+ }
+ rp.instance = cp->instance;
+ err = mgmt_cmd_complete(sk, hdev->id,
+ MGMT_OP_ADD_EXT_ADV_DATA,
+ MGMT_STATUS_SUCCESS, &rp,
+ sizeof(rp));
+ goto unlock;
+ }
+
+ err = __hci_req_schedule_adv_instance(&req, schedule_instance,
+ true);
+ }
+
+ cmd = mgmt_pending_add(sk, MGMT_OP_ADD_EXT_ADV_DATA, hdev, data,
+ data_len);
+ if (!cmd) {
+ err = -ENOMEM;
+ goto clear_new_instance;
+ }
+
+ if (!err)
+ err = hci_req_run(&req, add_advertising_complete);
+
+ if (err < 0) {
+ err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_EXT_ADV_DATA,
+ MGMT_STATUS_FAILED);
+ mgmt_pending_remove(cmd);
+ goto clear_new_instance;
+ }
+
+ /* We were successful in updating data, so trigger advertising_added
+ * event if this is an instance that wasn't previously advertising. If
+ * a failure occurs in the requests we initiated, we will remove the
+ * instance again in add_advertising_complete
+ */
+ if (adv_instance->pending)
+ mgmt_advertising_added(sk, hdev, cp->instance);
+
+ goto unlock;
+
+clear_new_instance:
+ hci_remove_adv_instance(hdev, cp->instance);
+
+unlock:
+ hci_dev_unlock(hdev);
+
+ return err;
+}
+
static void remove_advertising_complete(struct hci_dev *hdev, u8 status,
u16 opcode)
{
@@ -7851,6 +8189,10 @@ static const struct hci_mgmt_handler mgmt_handlers[] = {
{ add_adv_patterns_monitor,MGMT_ADD_ADV_PATTERNS_MONITOR_SIZE,
HCI_MGMT_VAR_LEN },
{ remove_adv_monitor, MGMT_REMOVE_ADV_MONITOR_SIZE },
+ { add_ext_adv_params, MGMT_ADD_EXT_ADV_PARAMS_MIN_SIZE,
+ HCI_MGMT_VAR_LEN },
+ { add_ext_adv_data, MGMT_ADD_EXT_ADV_DATA_SIZE,
+ HCI_MGMT_VAR_LEN },
};
void mgmt_index_added(struct hci_dev *hdev)
--
2.28.0.681.g6f77f65b4e-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v2 3/6] Bluetooth: Use intervals and tx power from mgmt cmds
2020-09-17 22:22 [PATCH v2 0/6] Bluetooth: Add new MGMT interface for advertising add Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 1/6] Bluetooth: Add helper to set adv data Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 2/6] Bluetooth: Break add adv into two mgmt commands Daniel Winkler
@ 2020-09-17 22:22 ` Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 4/6] Bluetooth: Emit tx power chosen on ext adv params completion Daniel Winkler
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Daniel Winkler @ 2020-09-17 22:22 UTC (permalink / raw)
To: marcel
Cc: chromeos-bluetooth-upstreaming, linux-bluetooth, Daniel Winkler,
Sonny Sasaka, David S. Miller, Jakub Kicinski, Johan Hedberg,
linux-kernel, netdev
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>
---
Changes in v2: None
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 413e3a5aabf544..bd984b32e07553 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -1425,6 +1425,7 @@ 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;
@@ -1432,6 +1433,7 @@ 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.
@@ -1463,11 +1465,16 @@ 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;
@@ -1478,9 +1485,6 @@ 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;
}
}
@@ -1997,9 +2001,15 @@ 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);
@@ -2022,7 +2032,6 @@ 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,
--
2.28.0.681.g6f77f65b4e-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v2 4/6] Bluetooth: Emit tx power chosen on ext adv params completion
2020-09-17 22:22 [PATCH v2 0/6] Bluetooth: Add new MGMT interface for advertising add Daniel Winkler
` (2 preceding siblings ...)
2020-09-17 22:22 ` [PATCH v2 3/6] Bluetooth: Use intervals and tx power from mgmt cmds Daniel Winkler
@ 2020-09-17 22:22 ` Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 5/6] Bluetooth: Query LE tx power on startup Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 6/6] Bluetooth: Add MGMT command for controller capabilities Daniel Winkler
5 siblings, 0 replies; 7+ messages in thread
From: Daniel Winkler @ 2020-09-17 22:22 UTC (permalink / raw)
To: marcel
Cc: chromeos-bluetooth-upstreaming, linux-bluetooth, Daniel Winkler,
Sonny Sasaka, David S. Miller, Jakub Kicinski, Johan Hedberg,
linux-kernel, netdev
Our hci call to set extended advertising parameters returns the actual
tx power selected by the controller. This patch signals a new
TX_POWER_SELECTED mgmt event to alert the caller of the actual tx power
that is being used. This is important because the power selected will
not necessarily match the power requested by the user.
This patch is manually verified by ensuring the tx power selected event
is signalled and caught by bluetoothd.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
---
Changes in v2: None
include/net/bluetooth/hci_core.h | 2 ++
include/net/bluetooth/mgmt.h | 6 ++++++
net/bluetooth/hci_event.c | 4 ++++
net/bluetooth/mgmt.c | 11 +++++++++++
4 files changed, 23 insertions(+)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index ab168f46b6d909..667b9d37099dec 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1781,6 +1781,8 @@ void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
u8 instance);
void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
u8 instance);
+void mgmt_adv_tx_power_selected(struct hci_dev *hdev, u8 instance,
+ s8 tx_power);
int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 859f0d3cd6ea38..db64cf4747554c 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -1079,3 +1079,9 @@ struct mgmt_ev_controller_resume {
#define MGMT_WAKE_REASON_NON_BT_WAKE 0x0
#define MGMT_WAKE_REASON_UNEXPECTED 0x1
#define MGMT_WAKE_REASON_REMOTE_WAKE 0x2
+
+#define MGMT_EV_ADV_TX_POWER_SELECTED 0x002f
+struct mgmt_ev_adv_tx_power_selected {
+ __u8 instance;
+ __s8 tx_power;
+} __packed;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index bd306ba3ade545..9a24fd99d9e08e 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1749,6 +1749,10 @@ static void hci_cc_set_ext_adv_param(struct hci_dev *hdev, struct sk_buff *skb)
}
/* Update adv data as tx power is known now */
hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
+
+ if (cp->handle)
+ mgmt_adv_tx_power_selected(hdev, cp->handle, rp->tx_power);
+
hci_dev_unlock(hdev);
}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 717c97affb1554..b9347ff1a1e961 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -167,6 +167,7 @@ static const u16 mgmt_events[] = {
MGMT_EV_DEVICE_FLAGS_CHANGED,
MGMT_EV_CONTROLLER_SUSPEND,
MGMT_EV_CONTROLLER_RESUME,
+ MGMT_EV_ADV_TX_POWER_SELECTED,
};
static const u16 mgmt_untrusted_commands[] = {
@@ -1152,6 +1153,16 @@ void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
mgmt_event(MGMT_EV_ADVERTISING_REMOVED, hdev, &ev, sizeof(ev), sk);
}
+void mgmt_adv_tx_power_selected(struct hci_dev *hdev, u8 instance, s8 tx_power)
+{
+ struct mgmt_ev_adv_tx_power_selected ev;
+
+ ev.instance = instance;
+ ev.tx_power = tx_power;
+
+ mgmt_event(MGMT_EV_ADV_TX_POWER_SELECTED, hdev, &ev, sizeof(ev), NULL);
+}
+
static void cancel_adv_timeout(struct hci_dev *hdev)
{
if (hdev->adv_instance_timeout) {
--
2.28.0.681.g6f77f65b4e-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v2 5/6] Bluetooth: Query LE tx power on startup
2020-09-17 22:22 [PATCH v2 0/6] Bluetooth: Add new MGMT interface for advertising add Daniel Winkler
` (3 preceding siblings ...)
2020-09-17 22:22 ` [PATCH v2 4/6] Bluetooth: Emit tx power chosen on ext adv params completion Daniel Winkler
@ 2020-09-17 22:22 ` Daniel Winkler
2020-09-17 22:22 ` [PATCH v2 6/6] Bluetooth: Add MGMT command for controller capabilities Daniel Winkler
5 siblings, 0 replies; 7+ messages in thread
From: Daniel Winkler @ 2020-09-17 22:22 UTC (permalink / raw)
To: marcel
Cc: chromeos-bluetooth-upstreaming, linux-bluetooth, Daniel Winkler,
Sonny Sasaka, David S. Miller, Jakub Kicinski, Johan Hedberg,
linux-kernel, netdev
Queries tx power via HCI_LE_Read_Transmit_Power command when the hci
device is initialized, and stores resulting min/max LE power in hdev
struct. If command isn't available (< BT5 support), min/max values
both default to HCI_TX_POWER_INVALID.
This patch is manually verified by ensuring BT5 devices correctly query
and receive controller tx power range.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
---
Changes in v2: None
include/net/bluetooth/hci.h | 7 +++++++
include/net/bluetooth/hci_core.h | 2 ++
net/bluetooth/hci_core.c | 8 ++++++++
net/bluetooth/hci_event.c | 18 ++++++++++++++++++
4 files changed, 35 insertions(+)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index c8e67042a3b14c..c1504aa3d9cfd5 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1797,6 +1797,13 @@ struct hci_cp_le_set_adv_set_rand_addr {
bdaddr_t bdaddr;
} __packed;
+#define HCI_OP_LE_READ_TRANSMIT_POWER 0x204b
+struct hci_rp_le_read_transmit_power {
+ __u8 status;
+ __s8 min_le_tx_power;
+ __s8 max_le_tx_power;
+} __packed;
+
#define HCI_OP_LE_READ_BUFFER_SIZE_V2 0x2060
struct hci_rp_le_read_buffer_size_v2 {
__u8 status;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 667b9d37099dec..c1f5b5c4109215 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -381,6 +381,8 @@ struct hci_dev {
__u16 def_page_timeout;
__u16 def_multi_adv_rotation_duration;
__u16 def_le_autoconnect_timeout;
+ __s8 min_le_tx_power;
+ __s8 max_le_tx_power;
__u16 pkt_type;
__u16 esco_type;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 3a2332f4a9bba2..6bff1c09be3b42 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -741,6 +741,12 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt)
hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
}
+ if (hdev->commands[38] & 0x80) {
+ /* Read LE Min/Max Tx Power*/
+ hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER,
+ 0, NULL);
+ }
+
if (hdev->commands[26] & 0x40) {
/* Read LE White List Size */
hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
@@ -3654,6 +3660,8 @@ struct hci_dev *hci_alloc_dev(void)
hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
+ hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
+ hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 9a24fd99d9e08e..beb35680f3a83a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1202,6 +1202,20 @@ static void hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev,
hci_dev_unlock(hdev);
}
+static void hci_cc_le_read_transmit_power(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ struct hci_rp_le_read_transmit_power *rp = (void *)skb->data;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+ if (rp->status)
+ return;
+
+ hdev->min_le_tx_power = rp->min_le_tx_power;
+ hdev->max_le_tx_power = rp->max_le_tx_power;
+}
+
static void hci_cc_le_set_adv_enable(struct hci_dev *hdev, struct sk_buff *skb)
{
__u8 *sent, status = *((__u8 *) skb->data);
@@ -3577,6 +3591,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
hci_cc_le_set_adv_set_random_addr(hdev, skb);
break;
+ case HCI_OP_LE_READ_TRANSMIT_POWER:
+ hci_cc_le_read_transmit_power(hdev, skb);
+ break;
+
default:
BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
break;
--
2.28.0.681.g6f77f65b4e-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v2 6/6] Bluetooth: Add MGMT command for controller capabilities
2020-09-17 22:22 [PATCH v2 0/6] Bluetooth: Add new MGMT interface for advertising add Daniel Winkler
` (4 preceding siblings ...)
2020-09-17 22:22 ` [PATCH v2 5/6] Bluetooth: Query LE tx power on startup Daniel Winkler
@ 2020-09-17 22:22 ` Daniel Winkler
5 siblings, 0 replies; 7+ messages in thread
From: Daniel Winkler @ 2020-09-17 22:22 UTC (permalink / raw)
To: marcel
Cc: chromeos-bluetooth-upstreaming, linux-bluetooth, Daniel Winkler,
Sonny Sasaka, David S. Miller, Jakub Kicinski, Johan Hedberg,
linux-kernel, netdev
For advertising, we wish to know the LE tx power capabilities of the
controller in userspace, so this patch adds a new MGMT command to query
controller capabilities. The data returned is in TLV format, so it can
be easily used to convey any data determined to be useful in the future,
but for now it simply contains LE min and max tx power.
The change was tested by manually verifying that the new MGMT command
returns the tx power range as expected in userspace.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
---
Changes in v2:
- Fixed sparse error in Capabilities MGMT command
include/net/bluetooth/mgmt.h | 9 +++++++++
net/bluetooth/mgmt.c | 39 ++++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+)
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index db64cf4747554c..9aa792e5efc8d0 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -815,6 +815,15 @@ struct mgmt_rp_add_ext_adv_data {
__u8 instance;
} __packed;
+#define MGMT_CAP_LE_TX_PWR_MIN 0x0000
+#define MGMT_CAP_LE_TX_PWR_MAX 0x0001
+
+#define MGMT_OP_READ_CONTROLLER_CAP 0x0056
+#define MGMT_OP_READ_CONTROLLER_CAP_SIZE 0
+struct mgmt_rp_read_controller_cap {
+ __u8 capabilities[0];
+} __packed;
+
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index b9347ff1a1e961..fd36acb973ba1f 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -124,6 +124,7 @@ static const u16 mgmt_commands[] = {
MGMT_OP_REMOVE_ADV_MONITOR,
MGMT_OP_ADD_EXT_ADV_PARAMS,
MGMT_OP_ADD_EXT_ADV_DATA,
+ MGMT_OP_READ_CONTROLLER_CAP,
};
static const u16 mgmt_events[] = {
@@ -181,6 +182,7 @@ static const u16 mgmt_untrusted_commands[] = {
MGMT_OP_READ_EXP_FEATURES_INFO,
MGMT_OP_READ_DEF_SYSTEM_CONFIG,
MGMT_OP_READ_DEF_RUNTIME_CONFIG,
+ MGMT_OP_READ_CONTROLLER_CAP,
};
static const u16 mgmt_untrusted_events[] = {
@@ -4356,6 +4358,42 @@ static int remove_adv_monitor(struct sock *sk, struct hci_dev *hdev,
return err;
}
+static int read_controller_cap(struct sock *sk, struct hci_dev *hdev,
+ void *data, u16 len)
+{
+ u8 i = 0;
+
+ /* This command will return its data in TVL format. Currently we only
+ * wish to include LE tx power parameters, so this struct can be given
+ * a fixed size as data types are not changing.
+ */
+ struct {
+ struct mgmt_tlv entry;
+ __s8 value;
+ } __packed cap[2];
+
+ BT_DBG("request for %s", hdev->name);
+ memset(cap, 0, sizeof(cap));
+
+ hci_dev_lock(hdev);
+
+ /* Append LE tx power bounds */
+ cap[i].entry.type = cpu_to_le16(MGMT_CAP_LE_TX_PWR_MIN);
+ cap[i].entry.length = sizeof(__s8);
+ cap[i].value = hdev->min_le_tx_power;
+ i++;
+
+ cap[i].entry.type = cpu_to_le16(MGMT_CAP_LE_TX_PWR_MAX);
+ cap[i].entry.length = sizeof(__s8);
+ cap[i].value = hdev->max_le_tx_power;
+ i++;
+
+ hci_dev_unlock(hdev);
+
+ return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_CONTROLLER_CAP,
+ MGMT_STATUS_SUCCESS, cap, sizeof(cap));
+}
+
static void read_local_oob_data_complete(struct hci_dev *hdev, u8 status,
u16 opcode, struct sk_buff *skb)
{
@@ -8208,6 +8246,7 @@ static const struct hci_mgmt_handler mgmt_handlers[] = {
HCI_MGMT_VAR_LEN },
{ add_ext_adv_data, MGMT_ADD_EXT_ADV_DATA_SIZE,
HCI_MGMT_VAR_LEN },
+ { read_controller_cap, MGMT_OP_READ_CONTROLLER_CAP_SIZE },
};
void mgmt_index_added(struct hci_dev *hdev)
--
2.28.0.681.g6f77f65b4e-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread