Return-Path: From: Mat Martineau To: linux-bluetooth@vger.kernel.org, gustavo@padovan.org Cc: sunnyk@codeaurora.org Subject: [RFCv1 13/20] Bluetooth: Handle physical link completion Date: Tue, 11 Sep 2012 11:21:24 -0700 Message-Id: <1347387691-5285-14-git-send-email-mathewm@codeaurora.org> In-Reply-To: <1347387691-5285-1-git-send-email-mathewm@codeaurora.org> References: <1347387691-5285-1-git-send-email-mathewm@codeaurora.org> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Several different actions may be taken when an AMP physical link becomes available. A channel being created on an AMP controller must continue the connection process. A channel being moved needs to either send a move request or a move response. A failed physical link will revert to using a BR/EDR controller if possible. Signed-off-by: Mat Martineau --- net/bluetooth/l2cap_core.c | 166 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 0d57ab3..9d7fab0 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -977,6 +977,19 @@ static void l2cap_send_conn_req(struct l2cap_chan *chan) l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req); } +static void l2cap_send_create_chan_req(struct l2cap_chan *chan, u8 amp_id) +{ + struct l2cap_create_chan_req req; + req.scid = cpu_to_le16(chan->scid); + req.psm = chan->psm; + req.amp_id = amp_id; + + chan->ident = l2cap_get_ident(chan->conn); + + l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_REQ, + sizeof(req), &req); +} + static void l2cap_move_setup(struct l2cap_chan *chan) { struct sk_buff *skb; @@ -4128,6 +4141,23 @@ static int l2cap_create_channel_req(struct l2cap_conn *conn, return 0; } +static void l2cap_send_move_chan_req(struct l2cap_chan *chan, u8 dest_amp_id) +{ + struct l2cap_move_chan_req req; + u8 ident; + + BT_DBG("chan %p, dest_amp_id %d", chan, dest_amp_id); + + ident = l2cap_get_ident(chan->conn); + chan->ident = ident; + + req.icid = cpu_to_le16(chan->scid); + req.dest_amp_id = dest_amp_id; + + l2cap_send_cmd(chan->conn, ident, L2CAP_MOVE_CHAN_REQ, sizeof(req), + &req); +} + static void l2cap_send_move_chan_rsp(struct l2cap_conn *conn, u8 ident, u16 icid, u16 result) { @@ -4290,6 +4320,142 @@ static void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, } } +static void l2cap_do_create(struct l2cap_chan *chan, int result, + u8 local_amp_id, u8 remote_amp_id) +{ + if (!test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { + struct l2cap_conn_rsp rsp; + char buf[128]; + rsp.scid = cpu_to_le16(chan->dcid); + rsp.dcid = cpu_to_le16(chan->scid); + + /* Incoming channel on AMP */ + if (result == L2CAP_CR_SUCCESS) { + /* Send successful response */ + rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); + rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); + } else { + /* Send negative response */ + rsp.result = cpu_to_le16(L2CAP_CR_NO_MEM); + rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); + } + + l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_RSP, + sizeof(rsp), &rsp); + + if (result == L2CAP_CR_SUCCESS) { + __l2cap_state_change(chan, BT_CONFIG); + set_bit(CONF_REQ_SENT, &chan->conf_state); + l2cap_send_cmd(chan->conn, l2cap_get_ident(chan->conn), + L2CAP_CONF_REQ, + l2cap_build_conf_req(chan, buf), buf); + chan->num_conf_req++; + } + } else { + /* Outgoing channel on AMP */ + if (result == L2CAP_CR_SUCCESS) { + chan->local_amp_id = local_amp_id; + l2cap_send_create_chan_req(chan, remote_amp_id); + } else { + /* Revert to BR/EDR connect */ + l2cap_send_conn_req(chan); + } + } +} + +static void l2cap_do_move_initiate(struct l2cap_chan *chan, u8 local_amp_id, + u8 remote_amp_id) +{ + l2cap_move_setup(chan); + chan->move_id = local_amp_id; + chan->move_state = L2CAP_MOVE_WAIT_RSP; + + l2cap_send_move_chan_req(chan, remote_amp_id); + __set_chan_timer(chan, L2CAP_MOVE_TIMEOUT); +} + +static void l2cap_do_move_respond(struct l2cap_chan *chan, int result) +{ + struct hci_chan *hchan = NULL; + + /* Placeholder - get hci_chan for logical link */ + + if (hchan) { + if (hchan->state == BT_CONNECTED) { + /* Logical link is ready to go */ + chan->hs_hcon = hchan->conn; + chan->hs_hcon->l2cap_data = chan->conn; + chan->move_state = L2CAP_MOVE_WAIT_CONFIRM; + l2cap_send_move_chan_rsp(chan->conn, chan->ident, + chan->dcid, L2CAP_MR_SUCCESS); + + l2cap_logical_cfm(chan, hchan, L2CAP_MR_SUCCESS); + } else { + /* Wait for logical link to be ready */ + chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM; + } + } else { + /* Logical link not available */ + l2cap_send_move_chan_rsp(chan->conn, chan->ident, chan->dcid, + L2CAP_MR_NOT_ALLOWED); + } +} + +static void l2cap_do_move_cancel(struct l2cap_chan *chan, int result) +{ + if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) { + u8 rsp_result; + if (result == -EINVAL) + rsp_result = L2CAP_MR_BAD_ID; + else + rsp_result = L2CAP_MR_NOT_ALLOWED; + + l2cap_send_move_chan_rsp(chan->conn, chan->ident, chan->dcid, + rsp_result); + } + + chan->move_role = L2CAP_MOVE_ROLE_NONE; + chan->move_state = L2CAP_MOVE_STABLE; + + /* Restart data transmission */ + l2cap_ertm_send(chan); +} + +void l2cap_physical_cfm(struct l2cap_chan *chan, int result, u8 local_amp_id, + u8 remote_amp_id) +{ + BT_DBG("chan %p, result %d, local_amp_id %d, remote_amp_id %d", + chan, result, local_amp_id, remote_amp_id); + + l2cap_chan_lock(chan); + + if (chan->state == BT_DISCONN || chan->state == BT_CLOSED) { + l2cap_chan_unlock(chan); + return; + } + + if (chan->state != BT_CONNECTED) { + l2cap_do_create(chan, result, local_amp_id, remote_amp_id); + } else if (result != L2CAP_MR_SUCCESS) { + l2cap_do_move_cancel(chan, result); + } else { + switch (chan->move_role) { + case L2CAP_MOVE_ROLE_INITIATOR: + l2cap_do_move_initiate(chan, local_amp_id, + remote_amp_id); + break; + case L2CAP_MOVE_ROLE_RESPONDER: + l2cap_do_move_respond(chan, result); + break; + default: + l2cap_do_move_cancel(chan, result); + break; + } + } + + l2cap_chan_unlock(chan); +} + static inline int l2cap_move_channel_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) -- 1.7.12 -- Mat Martineau The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation