@@ -55,6 +55,8 @@
#define BTPROTO_CMTP 5
#define BTPROTO_HIDP 6
#define BTPROTO_AVDTP 7
+#define BTPROTO_ISO 8
+#define BTPROTO_LAST BTPROTO_ISO
#define SOL_HCI 0
#define SOL_L2CAP 6
@@ -149,10 +151,39 @@ struct bt_voice {
#define BT_MODE_LE_FLOWCTL 0x03
#define BT_MODE_EXT_FLOWCTL 0x04
-#define BT_PKT_STATUS 16
+#define BT_PKT_STATUS 16
#define BT_SCM_PKT_STATUS 0x03
+#define BT_ISO_QOS 17
+
+#define BT_ISO_QOS_CIG_UNSET 0xff
+#define BT_ISO_QOS_CIS_UNSET 0xff
+
+struct bt_iso_io_qos {
+ __u32 interval;
+ __u16 latency;
+ __u16 sdu;
+ __u8 phy;
+ __u8 rtn;
+};
+
+struct bt_iso_qos {
+ __u8 cig;
+ __u8 cis;
+ __u8 sca;
+ __u8 packing;
+ __u8 framing;
+ struct bt_iso_io_qos in;
+ struct bt_iso_io_qos out;
+};
+
+#define BT_ISO_PHY_1M 0x01
+#define BT_ISO_PHY_2M 0x02
+#define BT_ISO_PHY_CODED 0x04
+#define BT_ISO_PHY_ANY (BT_ISO_PHY_1M | BT_ISO_PHY_2M | \
+ BT_ISO_PHY_CODED)
+
__printf(1, 2)
void bt_info(const char *fmt, ...);
__printf(1, 2)
@@ -1884,6 +1884,25 @@ struct hci_cp_le_reject_cis {
__u8 reason;
} __packed;
+#define HCI_OP_LE_SETUP_ISO_PATH 0x206e
+struct hci_cp_le_setup_iso_path {
+ __le16 handle;
+ __u8 direction;
+ __u8 path;
+ __u8 codec;
+ __le16 codec_cid;
+ __le16 codec_vid;
+ __u8 delay[3];
+ __u8 codec_cfg_len;
+ __u8 codec_cfg[0];
+} __attribute__ ((packed));
+
+#define HCI_OP_LE_SET_HOST_FEATURE 0x2074
+struct hci_cp_le_set_host_feature {
+ __u8 bit_number;
+ __u8 bit_value;
+} __packed;
+
/* ---- HCI Events ---- */
#define HCI_EV_INQUIRY_COMPLETE 0x01
@@ -119,6 +119,7 @@ struct hci_conn_hash {
unsigned int acl_num;
unsigned int amp_num;
unsigned int sco_num;
+ unsigned int iso_num;
unsigned int le_num;
unsigned int le_num_slave;
};
@@ -419,13 +420,16 @@ struct hci_dev {
unsigned int acl_cnt;
unsigned int sco_cnt;
unsigned int le_cnt;
+ unsigned int iso_cnt;
unsigned int acl_mtu;
unsigned int sco_mtu;
unsigned int le_mtu;
+ unsigned int iso_mtu;
unsigned int acl_pkts;
unsigned int sco_pkts;
unsigned int le_pkts;
+ unsigned int iso_pkts;
__u16 block_len;
__u16 block_mtu;
@@ -589,6 +593,7 @@ enum conn_reasons {
CONN_REASON_PAIR_DEVICE,
CONN_REASON_L2CAP_CHAN,
CONN_REASON_SCO_CONNECT,
+ CONN_REASON_ISO_CONNECT,
};
struct hci_conn {
@@ -640,6 +645,7 @@ struct hci_conn {
__s8 rssi;
__s8 tx_power;
__s8 max_tx_power;
+ struct bt_iso_qos iso_qos;
unsigned long flags;
enum conn_reasons conn_reason;
@@ -670,6 +676,7 @@ struct hci_conn {
struct hci_dev *hdev;
void *l2cap_data;
void *sco_data;
+ void *iso_data;
struct amp_mgr *amp_mgr;
struct hci_conn *link;
@@ -875,6 +882,9 @@ static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
case ESCO_LINK:
h->sco_num++;
break;
+ case ISO_LINK:
+ h->iso_num++;
+ break;
}
}
@@ -901,6 +911,9 @@ static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
case ESCO_LINK:
h->sco_num--;
break;
+ case ISO_LINK:
+ h->iso_num--;
+ break;
}
}
@@ -917,6 +930,8 @@ static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
case SCO_LINK:
case ESCO_LINK:
return h->sco_num;
+ case ISO_LINK:
+ return h->iso_num;
default:
return 0;
}
@@ -926,7 +941,7 @@ static inline unsigned int hci_conn_count(struct hci_dev *hdev)
{
struct hci_conn_hash *c = &hdev->conn_hash;
- return c->acl_num + c->amp_num + c->sco_num + c->le_num;
+ return c->acl_num + c->amp_num + c->sco_num + c->le_num + c->iso_num;
}
static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
@@ -1012,6 +1027,30 @@ static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
return NULL;
}
+static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
+ bdaddr_t *ba,
+ __u8 ba_type)
+{
+ struct hci_conn_hash *h = &hdev->conn_hash;
+ struct hci_conn *c;
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(c, &h->list, list) {
+ if (c->type != ISO_LINK)
+ continue;
+
+ if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
+ rcu_read_unlock();
+ return c;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return NULL;
+}
+
static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
__u8 type, __u16 state)
{
@@ -1032,6 +1071,27 @@ static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
return NULL;
}
+typedef void (*hci_conn_func_t)(struct hci_conn *conn, void *data);
+static inline void hci_conn_hash_list_state(struct hci_dev *hdev,
+ hci_conn_func_t func, __u8 type,
+ __u16 state, void *data)
+{
+ struct hci_conn_hash *h = &hdev->conn_hash;
+ struct hci_conn *c;
+
+ if (!func)
+ return;
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(c, &h->list, list) {
+ if (c->type == type && c->state == state)
+ func(c, data);
+ }
+
+ rcu_read_unlock();
+}
+
static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
{
struct hci_conn_hash *h = &hdev->conn_hash;
@@ -1055,6 +1115,8 @@ static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
int hci_disconnect(struct hci_conn *conn, __u8 reason);
bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
void hci_sco_setup(struct hci_conn *conn, __u8 status);
+bool hci_iso_setup_path(struct hci_conn *conn);
+bool hci_le_create_cis(struct hci_conn *conn);
struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
u8 role);
@@ -1079,6 +1141,10 @@ struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
enum conn_reasons conn_reason);
struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
__u16 setting);
+struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
+ __u8 dst_type, struct bt_iso_qos *qos);
+struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
+ __u8 dst_type, struct bt_iso_qos *qos);
int hci_conn_check_link_mode(struct hci_conn *conn);
int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
@@ -1395,6 +1461,17 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
/* Extended advertising support */
#define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
+/* CIS Master/Slave support */
+#if IS_ENABLED(CONFIG_BT_ISO)
+#define cis_capable(dev) (cis_master_capable(dev) || cis_slave_capable(dev))
+#define cis_master_capable(dev) ((dev)->le_features[3] & HCI_LE_CIS_MASTER)
+#define cis_slave_capable(dev) ((dev)->le_features[3] & HCI_LE_CIS_SLAVE)
+#else
+#define cis_capable(dev) false
+#define cis_master_capable(dev) false
+#define cis_slave_capable(dev) false
+#endif
+
/* ----- HCI protocols ----- */
#define HCI_PROTO_DEFER 0x01
@@ -1409,6 +1486,10 @@ static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
case ESCO_LINK:
return sco_connect_ind(hdev, bdaddr, flags);
+ case ISO_LINK:
+ /* TODO: Handle connection indication */
+ return -EINVAL;
+
default:
BT_ERR("unknown link type %d", type);
return -EINVAL;
@@ -1657,6 +1738,7 @@ int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
const void *param);
void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
+void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb);
void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
@@ -124,6 +124,8 @@ struct hci_dev_info {
__u16 acl_pkts;
__u16 sco_mtu;
__u16 sco_pkts;
+ __u16 iso_mtu;
+ __u16 iso_pkts;
struct hci_dev_stats stat;
};
@@ -29,6 +29,7 @@ menuconfig BT
SCO audio links
L2CAP (Logical Link Control and Adaptation Protocol)
SMP (Security Manager Protocol) on LE (Low Energy) links
+ ISO isochronous links
HCI Device drivers (Interface to the hardware)
RFCOMM Module (RFCOMM Protocol)
BNEP Module (Bluetooth Network Encapsulation Protocol)
@@ -77,6 +78,14 @@ config BT_LE
Bluetooth Low Energy includes support low-energy physical
layer available with Bluetooth version 4.0 or later.
+config BT_ISO
+ bool "Bluetooth Isochronous (ISO) Channels support (Experimental)"
+ depends on BT_LE
+ help
+ Bluetooth Isochronous Channels includes support for
+ Connected Isochronous Stream (CIS) and Broadcast Isochronous Stream
+ (BIS).
+
config BT_6LOWPAN
tristate "Bluetooth 6LoWPAN support"
depends on BT_LE && 6LOWPAN
@@ -38,7 +38,7 @@
#include "selftest.h"
/* Bluetooth sockets */
-#define BT_MAX_PROTO 8
+#define BT_MAX_PROTO BTPROTO_LAST + 1
static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
static DEFINE_RWLOCK(bt_proto_lock);
@@ -52,6 +52,7 @@ static const char *const bt_key_strings[BT_MAX_PROTO] = {
"sk_lock-AF_BLUETOOTH-BTPROTO_CMTP",
"sk_lock-AF_BLUETOOTH-BTPROTO_HIDP",
"sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP",
+ "sk_lock-AF_BLUETOOTH-BTPROTO_ISO",
};
static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
@@ -64,6 +65,7 @@ static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
"slock-AF_BLUETOOTH-BTPROTO_CMTP",
"slock-AF_BLUETOOTH-BTPROTO_HIDP",
"slock-AF_BLUETOOTH-BTPROTO_AVDTP",
+ "slock-AF_BLUETOOTH-BTPROTO_ISO",
};
void bt_sock_reclassify_lock(struct sock *sk, int proto)
@@ -572,6 +572,7 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
break;
case LE_LINK:
+ case ISO_LINK:
/* conn->src should reflect the local identity address */
hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
break;
@@ -1336,6 +1337,291 @@ struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
return sco;
}
+struct iso_list_data {
+ u8 cig;
+ u8 cis;
+ int count;
+ struct {
+ struct hci_cp_le_set_cig_params cp;
+ struct hci_cis_params cis[0x11];
+ } pdu;
+};
+
+static void cis_add(struct iso_list_data *d, struct bt_iso_qos *qos)
+{
+ struct hci_cis_params *cis = &d->pdu.cis[d->pdu.cp.num_cis];
+
+ cis->cis_id = qos->cis;
+ cis->m_sdu = qos->out.sdu;
+ cis->s_sdu = qos->in.sdu;
+ cis->m_phy = qos->out.phy;
+ cis->s_phy = qos->in.phy;
+ cis->m_rtn = qos->out.rtn;
+ cis->s_rtn = qos->in.rtn;
+
+ d->pdu.cp.num_cis++;
+}
+
+static void cis_list(struct hci_conn *conn, void *data)
+{
+ struct iso_list_data *d = data;
+
+ if (d->cig != conn->iso_qos.cig || d->cis == BT_ISO_QOS_CIS_UNSET ||
+ d->cis != conn->iso_qos.cis)
+ return;
+
+ d->count++;
+
+ if (d->pdu.cp.cig_id == BT_ISO_QOS_CIG_UNSET ||
+ d->count >= ARRAY_SIZE(d->pdu.cis))
+ return;
+
+ cis_add(d, &conn->iso_qos);
+}
+
+static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct iso_list_data data;
+
+ memset(&data, 0, sizeof(data));
+
+ /* Allocate a CIG if not set */
+ if (qos->cig == BT_ISO_QOS_CIG_UNSET) {
+ for (data.cig = 0x00; data.cig < 0xff; data.cig++) {
+ data.count = 0;
+ data.cis = 0xff;
+
+ hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
+ BT_BOUND, &data);
+ if (data.count)
+ continue;
+
+ hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
+ BT_CONNECTED, &data);
+ if (!data.count)
+ break;
+ }
+
+ if (data.cig == 0xff)
+ return false;
+
+ /* Update CIG */
+ qos->cig = data.cig;
+ }
+
+ data.pdu.cp.cig_id = qos->cig;
+ hci_cpu_to_le24(qos->out.interval, data.pdu.cp.m_interval);
+ hci_cpu_to_le24(qos->in.interval, data.pdu.cp.s_interval);
+ data.pdu.cp.sca = qos->sca;
+ data.pdu.cp.packing = qos->packing;
+ data.pdu.cp.framing = qos->framing;
+ data.pdu.cp.m_latency = cpu_to_le16(qos->out.latency);
+ data.pdu.cp.s_latency = cpu_to_le16(qos->in.latency);
+
+ /* List all CIS(s) with the same CIG */
+ for (data.cig = qos->cig, data.cis = 0x00; data.cis < 0x11;
+ data.cis++) {
+ data.count = 0;
+
+ hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
+ BT_BOUND, &data);
+ if (data.count)
+ continue;
+
+ /* Allocate a CIS if not set */
+ if (qos->cis == BT_ISO_QOS_CIG_UNSET) {
+ /* Update CIS */
+ qos->cis = data.cis;
+ cis_add(&data, qos);
+ }
+ }
+
+ if (qos->cis == BT_ISO_QOS_CIG_UNSET || !data.pdu.cp.num_cis)
+ return false;
+
+ if (hci_send_cmd(hdev, HCI_OP_LE_SET_CIG_PARAMS,
+ sizeof(data.pdu.cp) +
+ (data.pdu.cp.num_cis * sizeof(*data.pdu.cis)),
+ &data.pdu) < 0)
+ return false;
+
+ return true;
+}
+
+struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
+ __u8 dst_type, struct bt_iso_qos *qos)
+{
+ struct hci_conn *cis;
+
+ cis = hci_conn_hash_lookup_cis(hdev, dst, dst_type);
+ if (!cis) {
+ cis = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
+ if (!cis) {
+ return ERR_PTR(-ENOMEM);
+ }
+ }
+
+ if (cis->state == BT_CONNECTED)
+ return cis;
+
+ /* Check if CIS has been set and the settings matches */
+ if (cis->state == BT_BOUND &&
+ !memcmp(&cis->iso_qos, qos, sizeof(*qos)))
+ return cis;
+
+ /* Update LINK PHYs according to QoS preference */
+ cis->le_tx_phy = qos->out.phy;
+ cis->le_rx_phy = qos->in.phy;
+
+ /* Mirror PHYs that are disabled as SDU will be set to 0 */
+ if (!qos->in.phy)
+ qos->in.phy = qos->out.phy;
+
+ if (!qos->out.phy)
+ qos->out.phy = qos->in.phy;
+
+ if (!hci_le_set_cig_params(cis, qos)) {
+ hci_conn_drop(cis);
+ return NULL;
+ }
+
+ cis->iso_qos = *qos;
+ cis->state = BT_BOUND;
+
+ return cis;
+}
+
+bool hci_iso_setup_path(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct hci_cp_le_setup_iso_path cmd;
+
+ /* TODO: Remove this check since it is mandatory to support Setup ISO
+ * Path when ISO is supported by the controller.
+ */
+ if (!(hdev->commands[43] & (0x08)))
+ return false;
+
+ memset(&cmd, 0, sizeof(cmd));
+
+ cmd.handle = cpu_to_le16(conn->handle);
+ cmd.direction = 0x00; /* Input (Host to Controller) */
+ cmd.path = conn->le_tx_phy ? 0x00 : 0xff; /* HCI path if enabled */
+ cmd.codec = 0x03; /* Transparent Data */
+
+ if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd), &cmd) < 0)
+ return false;
+
+ cmd.direction = 0x01; /* Output (Controller to Host) */
+ cmd.path = conn->le_rx_phy ? 0x00 : 0xff; /* HCI path if enabled */
+
+ if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd), &cmd) < 0)
+ return false;
+
+ return true;
+}
+
+bool hci_le_create_cis(struct hci_conn *conn)
+{
+ struct hci_conn *cis;
+ struct hci_dev *hdev = conn->hdev;
+ struct {
+ struct hci_cp_le_create_cis cp;
+ struct hci_cis cis;
+ } cmd;
+
+ if (conn->type != LE_LINK || !conn->link || conn->state != BT_CONNECTED)
+ return false;
+
+ cis = conn->link;
+
+ if (cis->state == BT_CONNECT)
+ return true;
+
+ cmd.cp.num_cis = 0x01;
+ cmd.cis.acl_handle = cpu_to_le16(conn->handle);
+ cmd.cis.cis_handle = cpu_to_le16(cis->handle);
+
+ if (hci_send_cmd(hdev, HCI_OP_LE_CREATE_CIS, sizeof(cmd), &cmd) < 0)
+ return false;
+
+ cis->state = BT_CONNECT;
+
+ return true;
+}
+
+static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn,
+ struct bt_iso_io_qos *qos, __u8 phy)
+{
+ /* Only set MTU if PHY is enabled */
+ if (!qos->sdu && qos->phy) {
+ if (hdev->iso_mtu > 0)
+ qos->sdu = hdev->iso_mtu;
+ else if (hdev->le_mtu > 0)
+ qos->sdu = hdev->le_mtu;
+ else
+ qos->sdu = hdev->acl_mtu;
+ }
+
+ /* Use the same PHY as ACL if set to any */
+ if (qos->phy == BT_ISO_PHY_ANY)
+ qos->phy = phy;
+
+ /* Use LE ACL connection interval if not set */
+ if (!qos->interval)
+ /* ACL interval unit in 1.25 ms to us */
+ qos->interval = conn->le_conn_interval * 1250;
+
+ /* Use LE ACL connection latency if not set */
+ if (!qos->latency)
+ qos->latency = conn->le_conn_latency;
+}
+
+struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
+ __u8 dst_type, struct bt_iso_qos *qos)
+{
+ struct hci_conn *le;
+ struct hci_conn *cis;
+
+ /* Convert from ISO socket address type to HCI address type */
+ if (dst_type == BDADDR_LE_PUBLIC)
+ dst_type = ADDR_LE_DEV_PUBLIC;
+ else
+ dst_type = ADDR_LE_DEV_RANDOM;
+
+ if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
+ le = hci_connect_le(hdev, dst, dst_type,
+ BT_SECURITY_LOW,
+ HCI_LE_CONN_TIMEOUT,
+ HCI_ROLE_SLAVE, NULL);
+ else
+ le = hci_connect_le_scan(hdev, dst, dst_type,
+ BT_SECURITY_LOW,
+ HCI_LE_CONN_TIMEOUT,
+ CONN_REASON_ISO_CONNECT);
+ if (IS_ERR(le))
+ return le;
+
+ hci_iso_qos_setup(hdev, le, &qos->out,
+ le->le_tx_phy ? le->le_tx_phy : hdev->le_tx_def_phys);
+ hci_iso_qos_setup(hdev, le, &qos->in,
+ le->le_rx_phy ? le->le_rx_phy : hdev->le_rx_def_phys);
+
+ cis = hci_bind_cis(hdev, dst, dst_type, qos);
+ if (!cis) {
+ hci_conn_drop(le);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ le->link = cis;
+ cis->link = le;
+
+ hci_conn_hold(cis);
+
+ return cis;
+}
+
/* Check link security requirement */
int hci_conn_check_link_mode(struct hci_conn *conn)
{
@@ -304,8 +304,12 @@ static void le_setup(struct hci_request *req)
{
struct hci_dev *hdev = req->hdev;
- /* Read LE Buffer Size */
- hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
+ if (cis_capable(req->hdev))
+ /* Read LE Buffer Size V2 */
+ hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE_V2, 0, NULL);
+ else
+ /* Read LE Buffer Size */
+ hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
/* Read LE Local Supported Features */
hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
@@ -727,6 +731,28 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt)
* Terminated
*/
+ if (cis_capable(hdev)) {
+ /* TODO: Remove this check since it is mandatory to
+ * support Set Host Feature when ISO is supported by
+ * the controller.
+ */
+ if (hdev->commands[44] & (0x01)) {
+ struct hci_cp_le_set_host_feature cp;
+
+ /* Isochronous Channels (Host Support) */
+ cp.bit_number = 32;
+ cp.bit_value = 1;
+
+ /* LE Set Host Features */
+ hci_req_add(req, HCI_OP_LE_SET_HOST_FEATURE,
+ sizeof(cp), &cp);
+ }
+
+ events[3] |= 0x01; /* LE CIS Established */
+ if (cis_slave_capable(hdev))
+ events[3] |= 0x02; /* LE CIS Request */
+ }
+
hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
events);
@@ -1887,7 +1913,10 @@ static int hci_dev_do_reset(struct hci_dev *hdev)
hdev->flush(hdev);
atomic_set(&hdev->cmd_cnt, 1);
- hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
+ hdev->acl_cnt = 0;
+ hdev->sco_cnt = 0;
+ hdev->le_cnt = 0;
+ hdev->iso_cnt = 0;
ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
@@ -4283,9 +4312,117 @@ void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
queue_work(hdev->workqueue, &hdev->tx_work);
}
+/* Send ISO data */
+static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags)
+{
+ struct hci_iso_hdr *hdr;
+ int len = skb->len;
+
+ skb_push(skb, HCI_ISO_HDR_SIZE);
+ skb_reset_transport_header(skb);
+ hdr = (struct hci_iso_hdr *)skb_transport_header(skb);
+ hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
+ hdr->dlen = cpu_to_le16(len);
+}
+
+static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue,
+ struct sk_buff *skb)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct sk_buff *list;
+ __u16 flags;
+
+ skb->len = skb_headlen(skb);
+ skb->data_len = 0;
+
+ hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
+
+ list = skb_shinfo(skb)->frag_list;
+
+ flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00);
+ hci_add_iso_hdr(skb, conn->handle, flags);
+
+ if (!list) {
+ /* Non fragmented */
+ BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
+
+ skb_queue_tail(queue, skb);
+ } else {
+ /* Fragmented */
+ BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
+
+ skb_shinfo(skb)->frag_list = NULL;
+
+ __skb_queue_tail(queue, skb);
+
+ do {
+ skb = list; list = list->next;
+
+ hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
+ flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END,
+ 0x00);
+ hci_add_iso_hdr(skb, conn->handle, flags);
+
+ BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
+
+ __skb_queue_tail(queue, skb);
+ } while (list);
+ }
+}
+
+void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
+{
+ struct hci_dev *hdev = conn->hdev;
+
+ BT_DBG("%s len %d", hdev->name, skb->len);
+
+ hci_queue_iso(conn, &conn->data_q, skb);
+
+ queue_work(hdev->workqueue, &hdev->tx_work);
+}
+
/* ---- HCI TX task (outgoing data) ---- */
/* HCI Connection scheduler */
+static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
+{
+ struct hci_dev *hdev;
+ int cnt, q;
+
+ if (!conn) {
+ *quote = 0;
+ return;
+ }
+
+ hdev = conn->hdev;
+
+ switch (conn->type) {
+ case ACL_LINK:
+ cnt = hdev->acl_cnt;
+ break;
+ case AMP_LINK:
+ cnt = hdev->block_cnt;
+ break;
+ case SCO_LINK:
+ case ESCO_LINK:
+ cnt = hdev->sco_cnt;
+ break;
+ case LE_LINK:
+ cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
+ break;
+ case ISO_LINK:
+ cnt = hdev->iso_mtu ? hdev->iso_cnt :
+ hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
+ break;
+ default:
+ cnt = 0;
+ bt_dev_err(hdev, "unknown link type %d", conn->type);
+ }
+
+ q = cnt / num;
+ *quote = q ? q : 1;
+}
+
static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
int *quote)
{
@@ -4318,29 +4455,7 @@ static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
rcu_read_unlock();
- if (conn) {
- int cnt, q;
-
- switch (conn->type) {
- case ACL_LINK:
- cnt = hdev->acl_cnt;
- break;
- case SCO_LINK:
- case ESCO_LINK:
- cnt = hdev->sco_cnt;
- break;
- case LE_LINK:
- cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
- break;
- default:
- cnt = 0;
- bt_dev_err(hdev, "unknown link type %d", conn->type);
- }
-
- q = cnt / num;
- *quote = q ? q : 1;
- } else
- *quote = 0;
+ hci_quote_sent(conn, num, quote);
BT_DBG("conn %p quote %d", conn, *quote);
return conn;
@@ -4374,7 +4489,7 @@ static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
struct hci_chan *chan = NULL;
unsigned int num = 0, min = ~0, cur_prio = 0;
struct hci_conn *conn;
- int cnt, q, conn_num = 0;
+ int conn_num = 0;
BT_DBG("%s", hdev->name);
@@ -4424,27 +4539,8 @@ static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
if (!chan)
return NULL;
- switch (chan->conn->type) {
- case ACL_LINK:
- cnt = hdev->acl_cnt;
- break;
- case AMP_LINK:
- cnt = hdev->block_cnt;
- break;
- case SCO_LINK:
- case ESCO_LINK:
- cnt = hdev->sco_cnt;
- break;
- case LE_LINK:
- cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
- break;
- default:
- cnt = 0;
- bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
- }
+ hci_quote_sent(chan->conn, num, quote);
- q = cnt / num;
- *quote = q ? q : 1;
BT_DBG("chan %p quote %d", chan, *quote);
return chan;
}
@@ -4733,13 +4829,40 @@ static void hci_sched_le(struct hci_dev *hdev)
hci_prio_recalculate(hdev, LE_LINK);
}
+/* Schedule CIS */
+static void hci_sched_iso(struct hci_dev *hdev)
+{
+ struct hci_conn *conn;
+ struct sk_buff *skb;
+ int quote, *cnt;
+
+ BT_DBG("%s", hdev->name);
+
+ if (!hci_conn_num(hdev, ISO_LINK))
+ return;
+
+ cnt = hdev->iso_pkts ? &hdev->iso_cnt :
+ hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
+ while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, "e))) {
+ while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
+ BT_DBG("skb %p len %d", skb, skb->len);
+ hci_send_frame(hdev, skb);
+
+ conn->sent++;
+ if (conn->sent == ~0)
+ conn->sent = 0;
+ (*cnt)--;
+ }
+ }
+}
+
static void hci_tx_work(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
struct sk_buff *skb;
- BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
- hdev->sco_cnt, hdev->le_cnt);
+ BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt,
+ hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt);
if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
/* Schedule queues and send stuff to HCI driver */
@@ -4747,6 +4870,9 @@ static void hci_tx_work(struct work_struct *work)
hci_sched_esco(hdev);
hci_sched_acl(hdev);
hci_sched_le(hdev);
+
+ if (IS_ENABLED(CONFIG_BT_ISO))
+ hci_sched_iso(hdev);
}
/* Send next queued raw (unknown type) packet */
@@ -4827,6 +4953,34 @@ static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
kfree_skb(skb);
}
+static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_iso_hdr *hdr = (void *) skb->data;
+ struct hci_conn *conn;
+ __u16 handle, flags;
+
+ skb_pull(skb, HCI_ISO_HDR_SIZE);
+
+ handle = __le16_to_cpu(hdr->handle);
+ flags = hci_flags(handle);
+ handle = hci_handle(handle);
+
+ BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
+ handle, flags);
+
+ hci_dev_lock(hdev);
+ conn = hci_conn_hash_lookup_handle(hdev, handle);
+ hci_dev_unlock(hdev);
+
+ /* TODO: Send to upper protocol */
+ if (!conn) {
+ bt_dev_err(hdev, "ISO packet for unknown connection handle %d",
+ handle);
+ }
+
+ kfree_skb(skb);
+}
+
static bool hci_req_is_complete(struct hci_dev *hdev)
{
struct sk_buff *skb;
@@ -4981,6 +5135,15 @@ static void hci_rx_work(struct work_struct *work)
hci_scodata_packet(hdev, skb);
break;
+ case HCI_ISODATA_PKT:
+ BT_DBG("%s ISO data packet", hdev->name);
+
+ if (IS_ENABLED(CONFIG_BT_ISO)) {
+ hci_isodata_packet(hdev, skb);
+ break;
+ }
+
+ /* Fall through */
default:
kfree_skb(skb);
break;
@@ -1030,13 +1030,22 @@ static void hci_cc_le_read_local_features(struct hci_dev *hdev,
struct sk_buff *skb)
{
struct hci_rp_le_read_local_features *rp = (void *) skb->data;
+ bool cis;
BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
if (rp->status)
return;
+ /* Check current stored flags */
+ cis = cis_capable(hdev);
+
memcpy(hdev->le_features, rp->features, 8);
+
+ /* Attempt to use Read Buffer Size V2 if CIS becomes supported */
+ if (!cis && cis_capable(hdev))
+ /* Read LE Buffer Size V2 */
+ hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE_V2, 0, NULL);
}
static void hci_cc_le_read_adv_tx_power(struct hci_dev *hdev,
@@ -3247,6 +3256,105 @@ static void hci_remote_features_evt(struct hci_dev *hdev,
hci_dev_unlock(hdev);
}
+static void hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ struct hci_rp_le_read_buffer_size_v2 *rp = (void *) skb->data;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+ if (rp->status)
+ return;
+
+ hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
+ hdev->le_pkts = __le16_to_cpu(rp->acl_max_pkt);
+ hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
+ hdev->iso_pkts = __le16_to_cpu(rp->iso_max_pkt);
+
+ hdev->le_cnt = hdev->le_pkts;
+ hdev->iso_cnt = hdev->iso_pkts;
+
+ BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
+ hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
+}
+
+static void hci_cc_le_set_cig_params(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_rp_le_set_cig_params *rp = (void *) skb->data;
+ struct hci_conn *conn;
+ int i = 0;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+ hci_dev_lock(hdev);
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
+ if (conn->type != ISO_LINK || conn->iso_qos.cig != rp->cig_id ||
+ conn->state == BT_CONNECTED)
+ continue;
+
+ if (rp->status) {
+ conn->state = BT_CLOSED;
+ hci_connect_cfm(conn, rp->status);
+ hci_conn_del(conn);
+ goto unlock;
+ }
+
+ conn->handle = __le16_to_cpu(rp->handle[i++]);
+
+ BT_DBG("%p handle 0x%4.4x link %p state %u", conn, conn->handle,
+ conn->link, conn->link->state);
+
+ /* Create CIS if LE is already connected */
+ if (conn->link->state == BT_CONNECTED)
+ hci_le_create_cis(conn->link);
+
+ if (i == rp->num_handles)
+ break;
+ }
+
+unlock:
+ rcu_read_unlock();
+
+ hci_dev_unlock(hdev);
+}
+
+static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
+{
+ struct hci_cp_le_create_cis *cp;
+ int i;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+ if (!status)
+ return;
+
+ cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
+ if (!cp)
+ return;
+
+ hci_dev_lock(hdev);
+
+ /* Remove connection if command failed */
+ for (i = 0; cp->num_cis; cp->num_cis--, i++) {
+ struct hci_conn *conn;
+ u16 handle;
+
+ handle = __le16_to_cpu(cp->cis[i].cis_handle);
+
+ conn = hci_conn_hash_lookup_handle(hdev, handle);
+ if (conn) {
+ conn->state = BT_CLOSED;
+ hci_connect_cfm(conn, status);
+ hci_conn_del(conn);
+ }
+ }
+
+ hci_dev_unlock(hdev);
+}
+
static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
u16 *opcode, u8 *status,
hci_req_complete_t *req_complete,
@@ -3600,6 +3708,14 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
hci_cc_le_read_transmit_power(hdev, skb);
break;
+ case HCI_OP_LE_READ_BUFFER_SIZE_V2:
+ hci_cc_le_read_buffer_size_v2(hdev, skb);
+ break;
+
+ case HCI_OP_LE_SET_CIG_PARAMS:
+ hci_cc_le_set_cig_params(hdev, skb);
+ break;
+
default:
BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
break;
@@ -3705,6 +3821,10 @@ static void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb,
hci_cs_le_ext_create_conn(hdev, ev->status);
break;
+ case HCI_OP_LE_CREATE_CIS:
+ hci_cs_le_create_cis(hdev, ev->status);
+ break;
+
default:
BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
break;
@@ -3825,6 +3945,22 @@ static void hci_num_comp_pkts_evt(struct hci_dev *hdev, struct sk_buff *skb)
hdev->sco_cnt = hdev->sco_pkts;
break;
+ case ISO_LINK:
+ if (hdev->iso_pkts) {
+ hdev->iso_cnt += count;
+ if (hdev->iso_cnt > hdev->iso_pkts)
+ hdev->iso_cnt = hdev->iso_pkts;
+ } if (hdev->le_pkts) {
+ hdev->le_cnt += count;
+ if (hdev->le_cnt > hdev->le_pkts)
+ hdev->le_cnt = hdev->le_pkts;
+ } else {
+ hdev->acl_cnt += count;
+ if (hdev->acl_cnt > hdev->acl_pkts)
+ hdev->acl_cnt = hdev->acl_pkts;
+ }
+ break;
+
default:
bt_dev_err(hdev, "unknown type %d conn %p",
conn->type, conn);
@@ -5927,6 +6063,101 @@ static void hci_le_phy_update_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_dev_unlock(hdev);
}
+static void hci_le_cis_estabilished_evt(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ struct hci_evt_le_cis_established *ev = (void *) skb->data;
+ struct hci_conn *conn;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+ hci_dev_lock(hdev);
+
+ conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+ if (!conn)
+ goto unlock;
+
+ if (!ev->status) {
+ conn->state = BT_CONNECTED;
+ hci_debugfs_create_conn(conn);
+ hci_conn_add_sysfs(conn);
+ hci_iso_setup_path(conn);
+ }
+
+ /* TODO: report the event parameter? */
+ hci_connect_cfm(conn, ev->status);
+ if (ev->status)
+ hci_conn_del(conn);
+
+unlock:
+ hci_dev_unlock(hdev);
+}
+
+static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
+{
+ struct hci_cp_le_reject_cis cp;
+
+ cp.handle = handle;
+ cp.reason = HCI_ERROR_REJ_BAD_ADDR;
+ hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
+}
+
+static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
+{
+ struct hci_cp_le_accept_cis cp;
+
+ cp.handle = handle;
+ hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
+}
+
+static void hci_le_cis_req_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_evt_le_cis_req *ev = (void *) skb->data;
+ u16 acl_handle, cis_handle;
+ struct hci_conn *acl, *cis;
+ int mask = hdev->link_mode;
+ __u8 flags = 0;
+
+ acl_handle = __le16_to_cpu(ev->acl_handle);
+ cis_handle = __le16_to_cpu(ev->cis_handle);
+
+ BT_DBG("%s acl_handle 0x%4.4x cis_handle 0x%4.4x cig_id 0x%2.2x "
+ "cis_id 0x%2.2x", hdev->name, acl_handle, cis_handle,
+ ev->cig_id, ev->cis_id);
+
+ hci_dev_lock(hdev);
+
+ acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
+ if (!acl)
+ goto unlock;
+
+ mask |= hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
+ if (!(mask & HCI_LM_ACCEPT)) {
+ hci_le_reject_cis(hdev, ev->cis_handle);
+ goto unlock;
+ }
+
+ cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
+ if (!cis) {
+ cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE);
+ if (!cis) {
+ hci_le_reject_cis(hdev, ev->cis_handle);
+ goto unlock;
+ }
+ cis->handle = cis_handle;
+ }
+
+ if (!(flags & HCI_PROTO_DEFER)) {
+ hci_le_accept_cis(hdev, ev->cis_handle);
+ } else {
+ cis->state = BT_CONNECT2;
+ hci_connect_cfm(cis, 0);
+ }
+
+unlock:
+ hci_dev_unlock(hdev);
+}
+
static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_le_meta *le_ev = (void *) skb->data;
@@ -5978,7 +6209,18 @@ static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_le_ext_adv_term_evt(hdev, skb);
break;
+ case HCI_EVT_LE_CIS_ESTABLISHED:
+ if (IS_ENABLED(CONFIG_BT_ISO))
+ hci_le_cis_estabilished_evt(hdev, skb);
+ break;
+
+ case HCI_EVT_LE_CIS_REQ:
+ if (IS_ENABLED(CONFIG_BT_ISO))
+ hci_le_cis_req_evt(hdev, skb);
+ break;
+
default:
+ BT_DBG("%s event 0x%2.2x", hdev->name, le_ev->subevent);
break;
}
}