967 lines
20 KiB
C
967 lines
20 KiB
C
/*
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Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved.
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Copyright (c) 2011,2012 Intel Corp.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 and
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only version 2 as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <net/bluetooth/l2cap.h>
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#include <net/bluetooth/a2mp.h>
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#include <net/bluetooth/amp.h>
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/* Global AMP Manager list */
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LIST_HEAD(amp_mgr_list);
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DEFINE_MUTEX(amp_mgr_list_lock);
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/* A2MP build & send command helper functions */
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static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
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{
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struct a2mp_cmd *cmd;
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int plen;
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plen = sizeof(*cmd) + len;
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cmd = kzalloc(plen, GFP_KERNEL);
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if (!cmd)
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return NULL;
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cmd->code = code;
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cmd->ident = ident;
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cmd->len = cpu_to_le16(len);
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memcpy(cmd->data, data, len);
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return cmd;
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}
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void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data)
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{
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struct l2cap_chan *chan = mgr->a2mp_chan;
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struct a2mp_cmd *cmd;
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u16 total_len = len + sizeof(*cmd);
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struct kvec iv;
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struct msghdr msg;
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cmd = __a2mp_build(code, ident, len, data);
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if (!cmd)
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return;
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iv.iov_base = cmd;
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iv.iov_len = total_len;
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memset(&msg, 0, sizeof(msg));
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msg.msg_iov = (struct iovec *) &iv;
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msg.msg_iovlen = 1;
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l2cap_chan_send(chan, &msg, total_len, 0);
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kfree(cmd);
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}
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u8 __next_ident(struct amp_mgr *mgr)
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{
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if (++mgr->ident == 0)
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mgr->ident = 1;
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return mgr->ident;
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}
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static inline void __a2mp_cl_bredr(struct a2mp_cl *cl)
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{
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cl->id = 0;
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cl->type = 0;
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cl->status = 1;
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}
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/* hci_dev_list shall be locked */
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static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl, u8 num_ctrl)
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{
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int i = 0;
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struct hci_dev *hdev;
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__a2mp_cl_bredr(cl);
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list_for_each_entry(hdev, &hci_dev_list, list) {
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/* Iterate through AMP controllers */
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if (hdev->id == HCI_BREDR_ID)
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continue;
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/* Starting from second entry */
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if (++i >= num_ctrl)
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return;
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cl[i].id = hdev->id;
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cl[i].type = hdev->amp_type;
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cl[i].status = hdev->amp_status;
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}
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}
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/* Processing A2MP messages */
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static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_cmd_rej *rej = (void *) skb->data;
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if (le16_to_cpu(hdr->len) < sizeof(*rej))
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return -EINVAL;
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BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason));
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skb_pull(skb, sizeof(*rej));
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return 0;
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}
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static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_discov_req *req = (void *) skb->data;
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u16 len = le16_to_cpu(hdr->len);
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struct a2mp_discov_rsp *rsp;
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u16 ext_feat;
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u8 num_ctrl;
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if (len < sizeof(*req))
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return -EINVAL;
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skb_pull(skb, sizeof(*req));
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ext_feat = le16_to_cpu(req->ext_feat);
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BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat);
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/* check that packet is not broken for now */
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while (ext_feat & A2MP_FEAT_EXT) {
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if (len < sizeof(ext_feat))
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return -EINVAL;
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ext_feat = get_unaligned_le16(skb->data);
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BT_DBG("efm 0x%4.4x", ext_feat);
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len -= sizeof(ext_feat);
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skb_pull(skb, sizeof(ext_feat));
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}
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read_lock(&hci_dev_list_lock);
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num_ctrl = __hci_num_ctrl();
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len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp);
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rsp = kmalloc(len, GFP_ATOMIC);
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if (!rsp) {
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read_unlock(&hci_dev_list_lock);
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return -ENOMEM;
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}
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rsp->mtu = __constant_cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
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rsp->ext_feat = 0;
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__a2mp_add_cl(mgr, rsp->cl, num_ctrl);
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read_unlock(&hci_dev_list_lock);
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a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp);
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kfree(rsp);
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return 0;
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}
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static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_discov_rsp *rsp = (void *) skb->data;
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u16 len = le16_to_cpu(hdr->len);
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struct a2mp_cl *cl;
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u16 ext_feat;
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bool found = false;
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if (len < sizeof(*rsp))
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return -EINVAL;
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len -= sizeof(*rsp);
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skb_pull(skb, sizeof(*rsp));
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ext_feat = le16_to_cpu(rsp->ext_feat);
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BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat);
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/* check that packet is not broken for now */
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while (ext_feat & A2MP_FEAT_EXT) {
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if (len < sizeof(ext_feat))
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return -EINVAL;
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ext_feat = get_unaligned_le16(skb->data);
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BT_DBG("efm 0x%4.4x", ext_feat);
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len -= sizeof(ext_feat);
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skb_pull(skb, sizeof(ext_feat));
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}
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cl = (void *) skb->data;
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while (len >= sizeof(*cl)) {
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BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type,
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cl->status);
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if (cl->id != HCI_BREDR_ID && cl->type == HCI_AMP) {
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struct a2mp_info_req req;
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found = true;
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req.id = cl->id;
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a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
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sizeof(req), &req);
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}
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len -= sizeof(*cl);
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cl = (void *) skb_pull(skb, sizeof(*cl));
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}
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/* Fall back to L2CAP init sequence */
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if (!found) {
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struct l2cap_conn *conn = mgr->l2cap_conn;
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struct l2cap_chan *chan;
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mutex_lock(&conn->chan_lock);
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list_for_each_entry(chan, &conn->chan_l, list) {
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BT_DBG("chan %p state %s", chan,
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state_to_string(chan->state));
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if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP)
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continue;
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l2cap_chan_lock(chan);
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if (chan->state == BT_CONNECT)
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l2cap_send_conn_req(chan);
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l2cap_chan_unlock(chan);
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}
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mutex_unlock(&conn->chan_lock);
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}
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return 0;
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}
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static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_cl *cl = (void *) skb->data;
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while (skb->len >= sizeof(*cl)) {
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BT_DBG("Controller id %d type %d status %d", cl->id, cl->type,
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cl->status);
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cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl));
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}
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/* TODO send A2MP_CHANGE_RSP */
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return 0;
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}
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static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_info_req *req = (void *) skb->data;
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struct hci_dev *hdev;
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if (le16_to_cpu(hdr->len) < sizeof(*req))
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return -EINVAL;
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BT_DBG("id %d", req->id);
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hdev = hci_dev_get(req->id);
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if (!hdev) {
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struct a2mp_info_rsp rsp;
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rsp.id = req->id;
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rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
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a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp),
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&rsp);
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}
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if (hdev->dev_type != HCI_BREDR) {
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mgr->state = READ_LOC_AMP_INFO;
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hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
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}
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hci_dev_put(hdev);
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skb_pull(skb, sizeof(*req));
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return 0;
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}
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static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data;
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struct a2mp_amp_assoc_req req;
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struct amp_ctrl *ctrl;
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if (le16_to_cpu(hdr->len) < sizeof(*rsp))
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return -EINVAL;
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BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status);
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if (rsp->status)
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return -EINVAL;
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ctrl = amp_ctrl_add(mgr);
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if (!ctrl)
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return -ENOMEM;
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ctrl->id = rsp->id;
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req.id = rsp->id;
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a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req),
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&req);
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skb_pull(skb, sizeof(*rsp));
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return 0;
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}
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static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_amp_assoc_req *req = (void *) skb->data;
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struct hci_dev *hdev;
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struct amp_mgr *tmp;
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if (le16_to_cpu(hdr->len) < sizeof(*req))
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return -EINVAL;
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BT_DBG("id %d", req->id);
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/* Make sure that other request is not processed */
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tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
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hdev = hci_dev_get(req->id);
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if (!hdev || hdev->amp_type == HCI_BREDR || tmp) {
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struct a2mp_amp_assoc_rsp rsp;
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rsp.id = req->id;
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if (tmp) {
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rsp.status = A2MP_STATUS_COLLISION_OCCURED;
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amp_mgr_put(tmp);
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} else {
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rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
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}
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a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp),
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&rsp);
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goto done;
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}
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amp_read_loc_assoc(hdev, mgr);
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done:
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if (hdev)
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hci_dev_put(hdev);
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skb_pull(skb, sizeof(*req));
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return 0;
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}
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static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data;
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u16 len = le16_to_cpu(hdr->len);
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struct hci_dev *hdev;
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struct amp_ctrl *ctrl;
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struct hci_conn *hcon;
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if (len < sizeof(*rsp))
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return -EINVAL;
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BT_DBG("id %d status 0x%2.2x assoc len %lu", rsp->id, rsp->status,
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len - sizeof(*rsp));
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if (rsp->status)
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return -EINVAL;
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/* Save remote ASSOC data */
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ctrl = amp_ctrl_lookup(mgr, rsp->id);
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if (ctrl) {
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u8 *assoc, assoc_len = len - sizeof(*rsp);
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assoc = kzalloc(assoc_len, GFP_KERNEL);
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if (!assoc) {
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amp_ctrl_put(ctrl);
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return -ENOMEM;
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}
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memcpy(assoc, rsp->amp_assoc, assoc_len);
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ctrl->assoc = assoc;
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ctrl->assoc_len = assoc_len;
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ctrl->assoc_rem_len = assoc_len;
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ctrl->assoc_len_so_far = 0;
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amp_ctrl_put(ctrl);
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}
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/* Create Phys Link */
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hdev = hci_dev_get(rsp->id);
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if (!hdev)
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return -EINVAL;
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hcon = phylink_add(hdev, mgr, rsp->id);
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if (!hcon)
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goto done;
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BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id);
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mgr->bredr_chan->ctrl_id = rsp->id;
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amp_create_phylink(hdev, mgr, hcon);
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done:
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hci_dev_put(hdev);
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skb_pull(skb, len);
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return 0;
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}
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static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_physlink_req *req = (void *) skb->data;
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struct a2mp_physlink_rsp rsp;
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struct hci_dev *hdev;
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struct hci_conn *hcon;
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struct amp_ctrl *ctrl;
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if (le16_to_cpu(hdr->len) < sizeof(*req))
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return -EINVAL;
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BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id);
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rsp.local_id = req->remote_id;
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rsp.remote_id = req->local_id;
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hdev = hci_dev_get(req->remote_id);
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if (!hdev || hdev->amp_type != HCI_AMP) {
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rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
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goto send_rsp;
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}
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ctrl = amp_ctrl_lookup(mgr, rsp.remote_id);
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if (!ctrl) {
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ctrl = amp_ctrl_add(mgr);
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if (ctrl) {
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amp_ctrl_get(ctrl);
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} else {
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rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
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goto send_rsp;
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}
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}
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if (ctrl) {
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u8 *assoc, assoc_len = le16_to_cpu(hdr->len) - sizeof(*req);
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ctrl->id = rsp.remote_id;
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assoc = kzalloc(assoc_len, GFP_KERNEL);
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if (!assoc) {
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amp_ctrl_put(ctrl);
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return -ENOMEM;
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}
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memcpy(assoc, req->amp_assoc, assoc_len);
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ctrl->assoc = assoc;
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ctrl->assoc_len = assoc_len;
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ctrl->assoc_rem_len = assoc_len;
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ctrl->assoc_len_so_far = 0;
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amp_ctrl_put(ctrl);
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}
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hcon = phylink_add(hdev, mgr, req->local_id);
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if (hcon) {
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amp_accept_phylink(hdev, mgr, hcon);
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rsp.status = A2MP_STATUS_SUCCESS;
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} else {
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rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
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}
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send_rsp:
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if (hdev)
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hci_dev_put(hdev);
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a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, sizeof(rsp),
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&rsp);
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skb_pull(skb, le16_to_cpu(hdr->len));
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return 0;
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}
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static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
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struct a2mp_cmd *hdr)
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{
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struct a2mp_physlink_req *req = (void *) skb->data;
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struct a2mp_physlink_rsp rsp;
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struct hci_dev *hdev;
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struct hci_conn *hcon;
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if (le16_to_cpu(hdr->len) < sizeof(*req))
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return -EINVAL;
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BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id);
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rsp.local_id = req->remote_id;
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rsp.remote_id = req->local_id;
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rsp.status = A2MP_STATUS_SUCCESS;
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hdev = hci_dev_get(req->remote_id);
|
|
if (!hdev) {
|
|
rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
|
|
goto send_rsp;
|
|
}
|
|
|
|
hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, mgr->l2cap_conn->dst);
|
|
if (!hcon) {
|
|
BT_ERR("No phys link exist");
|
|
rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS;
|
|
goto clean;
|
|
}
|
|
|
|
/* TODO Disconnect Phys Link here */
|
|
|
|
clean:
|
|
hci_dev_put(hdev);
|
|
|
|
send_rsp:
|
|
a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp);
|
|
|
|
skb_pull(skb, sizeof(*req));
|
|
return 0;
|
|
}
|
|
|
|
static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
|
|
struct a2mp_cmd *hdr)
|
|
{
|
|
BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code);
|
|
|
|
skb_pull(skb, le16_to_cpu(hdr->len));
|
|
return 0;
|
|
}
|
|
|
|
/* Handle A2MP signalling */
|
|
static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
|
|
{
|
|
struct a2mp_cmd *hdr;
|
|
struct amp_mgr *mgr = chan->data;
|
|
int err = 0;
|
|
|
|
amp_mgr_get(mgr);
|
|
|
|
while (skb->len >= sizeof(*hdr)) {
|
|
u16 len;
|
|
|
|
hdr = (void *) skb->data;
|
|
len = le16_to_cpu(hdr->len);
|
|
|
|
BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len);
|
|
|
|
skb_pull(skb, sizeof(*hdr));
|
|
|
|
if (len > skb->len || !hdr->ident) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
mgr->ident = hdr->ident;
|
|
|
|
switch (hdr->code) {
|
|
case A2MP_COMMAND_REJ:
|
|
a2mp_command_rej(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_DISCOVER_REQ:
|
|
err = a2mp_discover_req(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_CHANGE_NOTIFY:
|
|
err = a2mp_change_notify(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_GETINFO_REQ:
|
|
err = a2mp_getinfo_req(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_GETAMPASSOC_REQ:
|
|
err = a2mp_getampassoc_req(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_CREATEPHYSLINK_REQ:
|
|
err = a2mp_createphyslink_req(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_DISCONNPHYSLINK_REQ:
|
|
err = a2mp_discphyslink_req(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_DISCOVER_RSP:
|
|
err = a2mp_discover_rsp(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_GETINFO_RSP:
|
|
err = a2mp_getinfo_rsp(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_GETAMPASSOC_RSP:
|
|
err = a2mp_getampassoc_rsp(mgr, skb, hdr);
|
|
break;
|
|
|
|
case A2MP_CHANGE_RSP:
|
|
case A2MP_CREATEPHYSLINK_RSP:
|
|
case A2MP_DISCONNPHYSLINK_RSP:
|
|
err = a2mp_cmd_rsp(mgr, skb, hdr);
|
|
break;
|
|
|
|
default:
|
|
BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code);
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (err) {
|
|
struct a2mp_cmd_rej rej;
|
|
|
|
rej.reason = __constant_cpu_to_le16(0);
|
|
hdr = (void *) skb->data;
|
|
|
|
BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err);
|
|
|
|
a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej),
|
|
&rej);
|
|
}
|
|
|
|
/* Always free skb and return success error code to prevent
|
|
from sending L2CAP Disconnect over A2MP channel */
|
|
kfree_skb(skb);
|
|
|
|
amp_mgr_put(mgr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void a2mp_chan_close_cb(struct l2cap_chan *chan)
|
|
{
|
|
l2cap_chan_put(chan);
|
|
}
|
|
|
|
static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state)
|
|
{
|
|
struct amp_mgr *mgr = chan->data;
|
|
|
|
if (!mgr)
|
|
return;
|
|
|
|
BT_DBG("chan %p state %s", chan, state_to_string(state));
|
|
|
|
chan->state = state;
|
|
|
|
switch (state) {
|
|
case BT_CLOSED:
|
|
if (mgr)
|
|
amp_mgr_put(mgr);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan,
|
|
unsigned long len, int nb)
|
|
{
|
|
return bt_skb_alloc(len, GFP_KERNEL);
|
|
}
|
|
|
|
static struct l2cap_ops a2mp_chan_ops = {
|
|
.name = "L2CAP A2MP channel",
|
|
.recv = a2mp_chan_recv_cb,
|
|
.close = a2mp_chan_close_cb,
|
|
.state_change = a2mp_chan_state_change_cb,
|
|
.alloc_skb = a2mp_chan_alloc_skb_cb,
|
|
|
|
/* Not implemented for A2MP */
|
|
.new_connection = l2cap_chan_no_new_connection,
|
|
.teardown = l2cap_chan_no_teardown,
|
|
.ready = l2cap_chan_no_ready,
|
|
};
|
|
|
|
static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked)
|
|
{
|
|
struct l2cap_chan *chan;
|
|
int err;
|
|
|
|
chan = l2cap_chan_create();
|
|
if (!chan)
|
|
return NULL;
|
|
|
|
BT_DBG("chan %p", chan);
|
|
|
|
chan->chan_type = L2CAP_CHAN_CONN_FIX_A2MP;
|
|
chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
|
|
|
|
chan->ops = &a2mp_chan_ops;
|
|
|
|
l2cap_chan_set_defaults(chan);
|
|
chan->remote_max_tx = chan->max_tx;
|
|
chan->remote_tx_win = chan->tx_win;
|
|
|
|
chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
|
|
chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
|
|
|
|
skb_queue_head_init(&chan->tx_q);
|
|
|
|
chan->mode = L2CAP_MODE_ERTM;
|
|
|
|
err = l2cap_ertm_init(chan);
|
|
if (err < 0) {
|
|
l2cap_chan_del(chan, 0);
|
|
return NULL;
|
|
}
|
|
|
|
chan->conf_state = 0;
|
|
|
|
if (locked)
|
|
__l2cap_chan_add(conn, chan);
|
|
else
|
|
l2cap_chan_add(conn, chan);
|
|
|
|
chan->remote_mps = chan->omtu;
|
|
chan->mps = chan->omtu;
|
|
|
|
chan->state = BT_CONNECTED;
|
|
|
|
return chan;
|
|
}
|
|
|
|
/* AMP Manager functions */
|
|
void amp_mgr_get(struct amp_mgr *mgr)
|
|
{
|
|
BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount));
|
|
|
|
kref_get(&mgr->kref);
|
|
}
|
|
|
|
static void amp_mgr_destroy(struct kref *kref)
|
|
{
|
|
struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref);
|
|
|
|
BT_DBG("mgr %p", mgr);
|
|
|
|
mutex_lock(&_mgr_list_lock);
|
|
list_del(&mgr->list);
|
|
mutex_unlock(&_mgr_list_lock);
|
|
|
|
amp_ctrl_list_flush(mgr);
|
|
kfree(mgr);
|
|
}
|
|
|
|
int amp_mgr_put(struct amp_mgr *mgr)
|
|
{
|
|
BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount));
|
|
|
|
return kref_put(&mgr->kref, &_mgr_destroy);
|
|
}
|
|
|
|
static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked)
|
|
{
|
|
struct amp_mgr *mgr;
|
|
struct l2cap_chan *chan;
|
|
|
|
mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
|
|
if (!mgr)
|
|
return NULL;
|
|
|
|
BT_DBG("conn %p mgr %p", conn, mgr);
|
|
|
|
mgr->l2cap_conn = conn;
|
|
|
|
chan = a2mp_chan_open(conn, locked);
|
|
if (!chan) {
|
|
kfree(mgr);
|
|
return NULL;
|
|
}
|
|
|
|
mgr->a2mp_chan = chan;
|
|
chan->data = mgr;
|
|
|
|
conn->hcon->amp_mgr = mgr;
|
|
|
|
kref_init(&mgr->kref);
|
|
|
|
/* Remote AMP ctrl list initialization */
|
|
INIT_LIST_HEAD(&mgr->amp_ctrls);
|
|
mutex_init(&mgr->amp_ctrls_lock);
|
|
|
|
mutex_lock(&_mgr_list_lock);
|
|
list_add(&mgr->list, &_mgr_list);
|
|
mutex_unlock(&_mgr_list_lock);
|
|
|
|
return mgr;
|
|
}
|
|
|
|
struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct amp_mgr *mgr;
|
|
|
|
mgr = amp_mgr_create(conn, false);
|
|
if (!mgr) {
|
|
BT_ERR("Could not create AMP manager");
|
|
return NULL;
|
|
}
|
|
|
|
BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan);
|
|
|
|
return mgr->a2mp_chan;
|
|
}
|
|
|
|
struct amp_mgr *amp_mgr_lookup_by_state(u8 state)
|
|
{
|
|
struct amp_mgr *mgr;
|
|
|
|
mutex_lock(&_mgr_list_lock);
|
|
list_for_each_entry(mgr, &_mgr_list, list) {
|
|
if (mgr->state == state) {
|
|
amp_mgr_get(mgr);
|
|
mutex_unlock(&_mgr_list_lock);
|
|
return mgr;
|
|
}
|
|
}
|
|
mutex_unlock(&_mgr_list_lock);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
|
|
{
|
|
struct amp_mgr *mgr;
|
|
struct a2mp_info_rsp rsp;
|
|
|
|
mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO);
|
|
if (!mgr)
|
|
return;
|
|
|
|
BT_DBG("%s mgr %p", hdev->name, mgr);
|
|
|
|
rsp.id = hdev->id;
|
|
rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
|
|
|
|
if (hdev->amp_type != HCI_BREDR) {
|
|
rsp.status = 0;
|
|
rsp.total_bw = cpu_to_le32(hdev->amp_total_bw);
|
|
rsp.max_bw = cpu_to_le32(hdev->amp_max_bw);
|
|
rsp.min_latency = cpu_to_le32(hdev->amp_min_latency);
|
|
rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap);
|
|
rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size);
|
|
}
|
|
|
|
a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp);
|
|
amp_mgr_put(mgr);
|
|
}
|
|
|
|
void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status)
|
|
{
|
|
struct amp_mgr *mgr;
|
|
struct amp_assoc *loc_assoc = &hdev->loc_assoc;
|
|
struct a2mp_amp_assoc_rsp *rsp;
|
|
size_t len;
|
|
|
|
mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
|
|
if (!mgr)
|
|
return;
|
|
|
|
BT_DBG("%s mgr %p", hdev->name, mgr);
|
|
|
|
len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len;
|
|
rsp = kzalloc(len, GFP_KERNEL);
|
|
if (!rsp) {
|
|
amp_mgr_put(mgr);
|
|
return;
|
|
}
|
|
|
|
rsp->id = hdev->id;
|
|
|
|
if (status) {
|
|
rsp->status = A2MP_STATUS_INVALID_CTRL_ID;
|
|
} else {
|
|
rsp->status = A2MP_STATUS_SUCCESS;
|
|
memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len);
|
|
}
|
|
|
|
a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp);
|
|
amp_mgr_put(mgr);
|
|
kfree(rsp);
|
|
}
|
|
|
|
void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status)
|
|
{
|
|
struct amp_mgr *mgr;
|
|
struct amp_assoc *loc_assoc = &hdev->loc_assoc;
|
|
struct a2mp_physlink_req *req;
|
|
struct l2cap_chan *bredr_chan;
|
|
size_t len;
|
|
|
|
mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL);
|
|
if (!mgr)
|
|
return;
|
|
|
|
len = sizeof(*req) + loc_assoc->len;
|
|
|
|
BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len);
|
|
|
|
req = kzalloc(len, GFP_KERNEL);
|
|
if (!req) {
|
|
amp_mgr_put(mgr);
|
|
return;
|
|
}
|
|
|
|
bredr_chan = mgr->bredr_chan;
|
|
if (!bredr_chan)
|
|
goto clean;
|
|
|
|
req->local_id = hdev->id;
|
|
req->remote_id = bredr_chan->ctrl_id;
|
|
memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len);
|
|
|
|
a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req);
|
|
|
|
clean:
|
|
amp_mgr_put(mgr);
|
|
kfree(req);
|
|
}
|
|
|
|
void a2mp_discover_amp(struct l2cap_chan *chan)
|
|
{
|
|
struct l2cap_conn *conn = chan->conn;
|
|
struct amp_mgr *mgr = conn->hcon->amp_mgr;
|
|
struct a2mp_discov_req req;
|
|
|
|
BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr);
|
|
|
|
if (!mgr) {
|
|
mgr = amp_mgr_create(conn, true);
|
|
if (!mgr)
|
|
return;
|
|
}
|
|
|
|
mgr->bredr_chan = chan;
|
|
|
|
req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
|
|
req.ext_feat = 0;
|
|
a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);
|
|
}
|