diff options
Diffstat (limited to 'net/bluetooth')
-rw-r--r-- | net/bluetooth/hci_conn.c | 74 | ||||
-rw-r--r-- | net/bluetooth/hci_event.c | 25 | ||||
-rw-r--r-- | net/bluetooth/hci_sync.c | 90 | ||||
-rw-r--r-- | net/bluetooth/iso.c | 2 |
4 files changed, 115 insertions, 76 deletions
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index 13c266dbee67..4b5223e62141 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -1990,59 +1990,47 @@ bool hci_iso_setup_path(struct hci_conn *conn) return true; } -static int hci_create_cis_sync(struct hci_dev *hdev, void *data) +int hci_conn_check_create_cis(struct hci_conn *conn) { - return hci_le_create_cis_sync(hdev, data); -} + if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY)) + return -EINVAL; -int hci_le_create_cis(struct hci_conn *conn) -{ - struct hci_conn *cis; - struct hci_link *link, *t; - struct hci_dev *hdev = conn->hdev; - int err; + if (!conn->parent || conn->parent->state != BT_CONNECTED || + conn->state != BT_CONNECT || conn->handle == HCI_CONN_HANDLE_UNSET) + return 1; - bt_dev_dbg(hdev, "hcon %p", conn); + return 0; +} - switch (conn->type) { - case LE_LINK: - if (conn->state != BT_CONNECTED || list_empty(&conn->link_list)) - return -EINVAL; +static int hci_create_cis_sync(struct hci_dev *hdev, void *data) +{ + return hci_le_create_cis_sync(hdev); +} - cis = NULL; +int hci_le_create_cis_pending(struct hci_dev *hdev) +{ + struct hci_conn *conn; + bool pending = false; - /* hci_conn_link uses list_add_tail_rcu so the list is in - * the same order as the connections are requested. - */ - list_for_each_entry_safe(link, t, &conn->link_list, list) { - if (link->conn->state == BT_BOUND) { - err = hci_le_create_cis(link->conn); - if (err) - return err; + rcu_read_lock(); - cis = link->conn; - } + list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) { + if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags)) { + rcu_read_unlock(); + return -EBUSY; } - return cis ? 0 : -EINVAL; - case ISO_LINK: - cis = conn; - break; - default: - return -EINVAL; + if (!hci_conn_check_create_cis(conn)) + pending = true; } - if (cis->state == BT_CONNECT) + rcu_read_unlock(); + + if (!pending) return 0; /* Queue Create CIS */ - err = hci_cmd_sync_queue(hdev, hci_create_cis_sync, cis, NULL); - if (err) - return err; - - cis->state = BT_CONNECT; - - return 0; + return hci_cmd_sync_queue(hdev, hci_create_cis_sync, NULL, NULL); } static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn, @@ -2317,11 +2305,9 @@ struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst, return ERR_PTR(-ENOLINK); } - /* If LE is already connected and CIS handle is already set proceed to - * Create CIS immediately. - */ - if (le->state == BT_CONNECTED && cis->handle != HCI_CONN_HANDLE_UNSET) - hci_le_create_cis(cis); + cis->state = BT_CONNECT; + + hci_le_create_cis_pending(hdev); return cis; } diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 86a7e4b3b98d..e7249ed3f5f2 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -3810,6 +3810,7 @@ static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data, struct hci_cp_le_set_cig_params *cp; struct hci_conn *conn; u8 status = rp->status; + bool pending = false; int i; bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); @@ -3852,13 +3853,15 @@ static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data, bt_dev_dbg(hdev, "%p handle 0x%4.4x parent %p", conn, conn->handle, conn->parent); - - /* Create CIS if LE is already connected */ - if (conn->parent && conn->parent->state == BT_CONNECTED) - hci_le_create_cis(conn); + + if (conn->state == BT_CONNECT) + pending = true; } unlock: + if (pending) + hci_le_create_cis_pending(hdev); + hci_dev_unlock(hdev); return rp->status; @@ -4224,6 +4227,7 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data, static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status) { struct hci_cp_le_create_cis *cp; + bool pending = false; int i; bt_dev_dbg(hdev, "status 0x%2.2x", status); @@ -4246,12 +4250,18 @@ static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status) conn = hci_conn_hash_lookup_handle(hdev, handle); if (conn) { + if (test_and_clear_bit(HCI_CONN_CREATE_CIS, + &conn->flags)) + pending = true; conn->state = BT_CLOSED; hci_connect_cfm(conn, status); hci_conn_del(conn); } } + if (pending) + hci_le_create_cis_pending(hdev); + hci_dev_unlock(hdev); } @@ -6790,6 +6800,7 @@ static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data, struct hci_evt_le_cis_established *ev = data; struct hci_conn *conn; struct bt_iso_qos *qos; + bool pending = false; u16 handle = __le16_to_cpu(ev->handle); bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); @@ -6813,6 +6824,8 @@ static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data, qos = &conn->iso_qos; + pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags); + /* Convert ISO Interval (1.25 ms slots) to SDU Interval (us) */ qos->ucast.in.interval = le16_to_cpu(ev->interval) * 1250; qos->ucast.out.interval = qos->ucast.in.interval; @@ -6854,10 +6867,14 @@ static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data, goto unlock; } + conn->state = BT_CLOSED; hci_connect_cfm(conn, ev->status); hci_conn_del(conn); unlock: + if (pending) + hci_le_create_cis_pending(hdev); + hci_dev_unlock(hdev); } diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index 4d1e32bb6a9c..b617d1dd247a 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -6260,56 +6260,92 @@ done: return err; } -int hci_le_create_cis_sync(struct hci_dev *hdev, struct hci_conn *conn) +int hci_le_create_cis_sync(struct hci_dev *hdev) { struct { struct hci_cp_le_create_cis cp; struct hci_cis cis[0x1f]; } cmd; - u8 cig; - struct hci_conn *hcon = conn; + struct hci_conn *conn; + u8 cig = BT_ISO_QOS_CIG_UNSET; + + /* The spec allows only one pending LE Create CIS command at a time. If + * the command is pending now, don't do anything. We check for pending + * connections after each CIS Established event. + * + * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E + * page 2566: + * + * If the Host issues this command before all the + * HCI_LE_CIS_Established events from the previous use of the + * command have been generated, the Controller shall return the + * error code Command Disallowed (0x0C). + * + * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E + * page 2567: + * + * When the Controller receives the HCI_LE_Create_CIS command, the + * Controller sends the HCI_Command_Status event to the Host. An + * HCI_LE_CIS_Established event will be generated for each CIS when it + * is established or if it is disconnected or considered lost before + * being established; until all the events are generated, the command + * remains pending. + */ memset(&cmd, 0, sizeof(cmd)); - cmd.cis[0].acl_handle = cpu_to_le16(conn->parent->handle); - cmd.cis[0].cis_handle = cpu_to_le16(conn->handle); - cmd.cp.num_cis++; - cig = conn->iso_qos.ucast.cig; hci_dev_lock(hdev); rcu_read_lock(); + /* Wait until previous Create CIS has completed */ list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) { - struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis]; + if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags)) + goto done; + } - if (conn == hcon || conn->type != ISO_LINK || - conn->state == BT_CONNECTED || - conn->iso_qos.ucast.cig != cig) + /* Find CIG with all CIS ready */ + list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) { + struct hci_conn *link; + + if (hci_conn_check_create_cis(conn)) continue; - /* Check if all CIS(s) belonging to a CIG are ready */ - if (!conn->parent || conn->parent->state != BT_CONNECTED || - conn->state != BT_CONNECT) { - cmd.cp.num_cis = 0; - break; + cig = conn->iso_qos.ucast.cig; + + list_for_each_entry_rcu(link, &hdev->conn_hash.list, list) { + if (hci_conn_check_create_cis(link) > 0 && + link->iso_qos.ucast.cig == cig && + link->state != BT_CONNECTED) { + cig = BT_ISO_QOS_CIG_UNSET; + break; + } } - /* Group all CIS with state BT_CONNECT since the spec don't - * allow to send them individually: - * - * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E - * page 2566: - * - * If the Host issues this command before all the - * HCI_LE_CIS_Established events from the previous use of the - * command have been generated, the Controller shall return the - * error code Command Disallowed (0x0C). - */ + if (cig != BT_ISO_QOS_CIG_UNSET) + break; + } + + if (cig == BT_ISO_QOS_CIG_UNSET) + goto done; + + list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) { + struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis]; + + if (hci_conn_check_create_cis(conn) || + conn->iso_qos.ucast.cig != cig) + continue; + + set_bit(HCI_CONN_CREATE_CIS, &conn->flags); cis->acl_handle = cpu_to_le16(conn->parent->handle); cis->cis_handle = cpu_to_le16(conn->handle); cmd.cp.num_cis++; + + if (cmd.cp.num_cis >= ARRAY_SIZE(cmd.cis)) + break; } +done: rcu_read_unlock(); hci_dev_unlock(hdev); diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index 5808d57c1d7b..5db4d68c96d5 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -1690,7 +1690,7 @@ static void iso_connect_cfm(struct hci_conn *hcon, __u8 status) } /* Create CIS if pending */ - hci_le_create_cis(hcon); + hci_le_create_cis_pending(hcon->hdev); return; } |