Commit ad933151 authored by Kiran K's avatar Kiran K Committed by Luiz Augusto von Dentz
Browse files

Bluetooth: Add offload feature under experimental flag 



Allow user level process to enable / disable codec offload
feature through mgmt interface. By default offload codec feature
is disabled.

Signed-off-by: default avatarKiran K <kiran.k@intel.com>
Reviewed-by: default avatarChethan T N <chethan.tumkur.narayan@intel.com>
Reviewed-by: default avatarSrivatsa Ravishankar <ravishankar.srivatsa@intel.com>
Signed-off-by: default avatarLuiz Augusto von Dentz <luiz.von.dentz@intel.com>
parent 904c139a

net/bluetooth/mgmt.c

+99 −1
Original line number Diff line number Diff line
@@ -3797,6 +3797,12 @@ static const u8 quality_report_uuid[16] = { 
	0x2d, 0x49, 0x06, 0x75, 0xbc, 0x59, 0x08, 0x33,

};



/* a6695ace-ee7f-4fb9-881a-5fac66c629af */

static const u8 offload_codecs_uuid[16] = {

	0xaf, 0x29, 0xc6, 0x66, 0xac, 0x5f, 0x1a, 0x88,

	0xb9, 0x4f, 0x7f, 0xee, 0xce, 0x5a, 0x69, 0xa6,

};



/* 671b10b5-42c0-4696-9227-eb28d1b049d6 */

static const u8 simult_central_periph_uuid[16] = {

	0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92,
@@ -3812,7 +3818,7 @@ static const u8 rpa_resolution_uuid[16] = { 
static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,

				  void *data, u16 data_len)

{

	char buf[82];   /* Enough space for 4 features: 2 + 20 * 4 */

	char buf[102];   /* Enough space for 5 features: 2 + 20 * 5 */

	struct mgmt_rp_read_exp_features_info *rp = (void *)buf;

	u16 idx = 0;

	u32 flags;
@@ -3874,6 +3880,26 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, 
		idx++;

	}



	if (hdev) {

		if (hdev->get_data_path_id) {

			/* BIT(0): indicating if offload codecs are

			 * supported by controller.

			 */

			flags = BIT(0);



			/* BIT(1): indicating if codec offload feature

			 * is enabled.

			 */

			if (hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED))

				flags |= BIT(1);

		} else {

			flags = 0;

		}

		memcpy(rp->features[idx].uuid, offload_codecs_uuid, 16);

		rp->features[idx].flags = cpu_to_le32(flags);

		idx++;

	}



	rp->feature_count = cpu_to_le16(idx);



	/* After reading the experimental features information, enable
@@ -4152,6 +4178,77 @@ static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev, 
	return err;

}



static int exp_offload_codec_feature_changed(bool enabled, struct sock *skip)

{

	struct mgmt_ev_exp_feature_changed ev;



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

	memcpy(ev.uuid, offload_codecs_uuid, 16);

	ev.flags = cpu_to_le32(enabled ? BIT(0) : 0);



	return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, NULL,

				  &ev, sizeof(ev),

				  HCI_MGMT_EXP_FEATURE_EVENTS, skip);

}



static int set_offload_codec_func(struct sock *sk, struct hci_dev *hdev,

				  struct mgmt_cp_set_exp_feature *cp,

				  u16 data_len)

{

	bool val, changed;

	int err;

	struct mgmt_rp_set_exp_feature rp;



	/* Command requires to use a valid controller index */

	if (!hdev)

		return mgmt_cmd_status(sk, MGMT_INDEX_NONE,

				       MGMT_OP_SET_EXP_FEATURE,

				       MGMT_STATUS_INVALID_INDEX);



	/* Parameters are limited to a single octet */

	if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1)

		return mgmt_cmd_status(sk, hdev->id,

				       MGMT_OP_SET_EXP_FEATURE,

				       MGMT_STATUS_INVALID_PARAMS);



	/* Only boolean on/off is supported */

	if (cp->param[0] != 0x00 && cp->param[0] != 0x01)

		return mgmt_cmd_status(sk, hdev->id,

				       MGMT_OP_SET_EXP_FEATURE,

				       MGMT_STATUS_INVALID_PARAMS);



	val = !!cp->param[0];

	changed = (val != hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED));



	if (!hdev->get_data_path_id) {

		return mgmt_cmd_status(sk, hdev->id,

				       MGMT_OP_SET_EXP_FEATURE,

				       MGMT_STATUS_NOT_SUPPORTED);

	}



	if (changed) {

		if (val)

			hci_dev_set_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED);

		else

			hci_dev_clear_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED);

	}



	bt_dev_info(hdev, "offload codecs enable %d changed %d",

		    val, changed);



	memcpy(rp.uuid, offload_codecs_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,

				&rp, sizeof(rp));



	if (changed)

		exp_offload_codec_feature_changed(val, sk);



	return err;

}



static const struct mgmt_exp_feature {

	const u8 *uuid;

	int (*set_func)(struct sock *sk, struct hci_dev *hdev,
@@ -4163,6 +4260,7 @@ static const struct mgmt_exp_feature { 
#endif

	EXP_FEAT(rpa_resolution_uuid, set_rpa_resolution_func),

	EXP_FEAT(quality_report_uuid, set_quality_report_func),

	EXP_FEAT(offload_codecs_uuid, set_offload_codec_func),



	/* end with a null feature */

	EXP_FEAT(NULL, NULL)