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1054 lines
22 KiB
1054 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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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*/ |
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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 "hci_request.h" |
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#include "a2mp.h" |
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#include "amp.h" |
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#define A2MP_FEAT_EXT 0x8000 |
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/* Global AMP Manager list */ |
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static LIST_HEAD(amp_mgr_list); |
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static 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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static 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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iov_iter_kvec(&msg.msg_iter, WRITE, &iv, 1, total_len); |
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l2cap_chan_send(chan, &msg, total_len); |
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kfree(cmd); |
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} |
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static 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 struct amp_mgr *amp_mgr_lookup_by_state(u8 state) |
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{ |
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struct amp_mgr *mgr; |
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mutex_lock(&_mgr_list_lock); |
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list_for_each_entry(mgr, &_mgr_list, list) { |
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if (test_and_clear_bit(state, &mgr->state)) { |
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amp_mgr_get(mgr); |
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mutex_unlock(&_mgr_list_lock); |
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return mgr; |
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} |
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} |
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mutex_unlock(&_mgr_list_lock); |
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return NULL; |
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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) |
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{ |
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struct hci_dev *hdev; |
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int i = 1; |
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cl[0].id = AMP_ID_BREDR; |
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cl[0].type = AMP_TYPE_BREDR; |
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cl[0].status = AMP_STATUS_BLUETOOTH_ONLY; |
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list_for_each_entry(hdev, &hci_dev_list, list) { |
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if (hdev->dev_type == HCI_AMP) { |
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cl[i].id = hdev->id; |
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cl[i].type = hdev->amp_type; |
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if (test_bit(HCI_UP, &hdev->flags)) |
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cl[i].status = hdev->amp_status; |
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else |
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cl[i].status = AMP_STATUS_POWERED_DOWN; |
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i++; |
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} |
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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 %u 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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struct hci_dev *hdev; |
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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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/* at minimum the BR/EDR needs to be listed */ |
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num_ctrl = 1; |
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list_for_each_entry(hdev, &hci_dev_list, list) { |
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if (hdev->dev_type == HCI_AMP) |
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num_ctrl++; |
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} |
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len = struct_size(rsp, cl, num_ctrl); |
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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 = 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); |
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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 %u type %u status %u", cl->id, cl->type, |
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cl->status); |
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if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) { |
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struct a2mp_info_req req; |
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found = true; |
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memset(&req, 0, sizeof(req)); |
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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 = 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->scid == L2CAP_CID_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 %u type %u status %u", cl->id, cl->type, |
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cl->status); |
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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 void read_local_amp_info_complete(struct hci_dev *hdev, u8 status, |
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u16 opcode) |
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{ |
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BT_DBG("%s status 0x%2.2x", hdev->name, status); |
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a2mp_send_getinfo_rsp(hdev); |
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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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struct hci_request hreq; |
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int err = 0; |
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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 %u", req->id); |
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hdev = hci_dev_get(req->id); |
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if (!hdev || hdev->dev_type != HCI_AMP) { |
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struct a2mp_info_rsp rsp; |
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memset(&rsp, 0, sizeof(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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goto done; |
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} |
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set_bit(READ_LOC_AMP_INFO, &mgr->state); |
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hci_req_init(&hreq, hdev); |
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hci_req_add(&hreq, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL); |
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err = hci_req_run(&hreq, read_local_amp_info_complete); |
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if (err < 0) |
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a2mp_send_getinfo_rsp(hdev); |
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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_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 %u 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, rsp->id); |
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if (!ctrl) |
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return -ENOMEM; |
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memset(&req, 0, sizeof(req)); |
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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 %u", 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 == AMP_TYPE_BREDR || tmp) { |
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struct a2mp_amp_assoc_rsp rsp; |
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memset(&rsp, 0, sizeof(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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size_t assoc_len; |
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|
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if (len < sizeof(*rsp)) |
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return -EINVAL; |
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assoc_len = len - sizeof(*rsp); |
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BT_DBG("id %u status 0x%2.2x assoc len %zu", rsp->id, rsp->status, |
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assoc_len); |
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if (rsp->status) |
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return -EINVAL; |
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|
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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; |
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assoc = kmemdup(rsp->amp_assoc, 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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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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|
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amp_ctrl_put(ctrl); |
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} |
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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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|
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hcon = phylink_add(hdev, mgr, rsp->id, true); |
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if (!hcon) |
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goto done; |
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BT_DBG("Created hcon %p: loc:%u -> rem:%u", hcon, hdev->id, rsp->id); |
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|
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mgr->bredr_chan->remote_amp_id = rsp->id; |
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|
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amp_create_phylink(hdev, mgr, hcon); |
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|
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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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|
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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 %u, remote_id %u", req->local_id, req->remote_id); |
|
|
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memset(&rsp, 0, sizeof(rsp)); |
|
|
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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 == AMP_TYPE_BREDR) { |
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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, rsp.remote_id); |
|
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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} |
|
|
|
if (ctrl) { |
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size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req); |
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u8 *assoc; |
|
|
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assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL); |
|
if (!assoc) { |
|
amp_ctrl_put(ctrl); |
|
hci_dev_put(hdev); |
|
return -ENOMEM; |
|
} |
|
|
|
ctrl->assoc = assoc; |
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ctrl->assoc_len = assoc_len; |
|
ctrl->assoc_rem_len = assoc_len; |
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ctrl->assoc_len_so_far = 0; |
|
|
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amp_ctrl_put(ctrl); |
|
} |
|
|
|
hcon = phylink_add(hdev, mgr, req->local_id, false); |
|
if (hcon) { |
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amp_accept_phylink(hdev, mgr, hcon); |
|
rsp.status = A2MP_STATUS_SUCCESS; |
|
} 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) |
|
hci_dev_put(hdev); |
|
|
|
/* Reply error now and success after HCI Write Remote AMP Assoc |
|
command complete with success status |
|
*/ |
|
if (rsp.status != A2MP_STATUS_SUCCESS) { |
|
a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, |
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sizeof(rsp), &rsp); |
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} else { |
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set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state); |
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mgr->ident = hdr->ident; |
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} |
|
|
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skb_pull(skb, le16_to_cpu(hdr->len)); |
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return 0; |
|
} |
|
|
|
static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
|
struct a2mp_cmd *hdr) |
|
{ |
|
struct a2mp_physlink_req *req = (void *) skb->data; |
|
struct a2mp_physlink_rsp rsp; |
|
struct hci_dev *hdev; |
|
struct hci_conn *hcon; |
|
|
|
if (le16_to_cpu(hdr->len) < sizeof(*req)) |
|
return -EINVAL; |
|
|
|
BT_DBG("local_id %u remote_id %u", req->local_id, req->remote_id); |
|
|
|
memset(&rsp, 0, sizeof(rsp)); |
|
|
|
rsp.local_id = req->remote_id; |
|
rsp.remote_id = req->local_id; |
|
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; |
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} |
|
|
|
hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, |
|
&mgr->l2cap_conn->hcon->dst); |
|
if (!hcon) { |
|
bt_dev_err(hdev, "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 %u 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 %u 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; |
|
|
|
memset(&rej, 0, sizeof(rej)); |
|
|
|
rej.reason = 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, |
|
int err) |
|
{ |
|
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 hdr_len, |
|
unsigned long len, int nb) |
|
{ |
|
struct sk_buff *skb; |
|
|
|
skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL); |
|
if (!skb) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
return skb; |
|
} |
|
|
|
static const 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, |
|
.defer = l2cap_chan_no_defer, |
|
.resume = l2cap_chan_no_resume, |
|
.set_shutdown = l2cap_chan_no_set_shutdown, |
|
.get_sndtimeo = l2cap_chan_no_get_sndtimeo, |
|
}; |
|
|
|
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_FIXED; |
|
chan->scid = L2CAP_CID_A2MP; |
|
chan->dcid = L2CAP_CID_A2MP; |
|
chan->omtu = L2CAP_A2MP_DEFAULT_MTU; |
|
chan->imtu = L2CAP_A2MP_DEFAULT_MTU; |
|
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 */ |
|
struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr) |
|
{ |
|
BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref)); |
|
|
|
kref_get(&mgr->kref); |
|
|
|
return mgr; |
|
} |
|
|
|
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, kref_read(&mgr->kref)); |
|
|
|
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; |
|
|
|
if (conn->hcon->type != ACL_LINK) |
|
return NULL; |
|
|
|
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; |
|
} |
|
|
|
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); |
|
|
|
memset(&rsp, 0, sizeof(rsp)); |
|
|
|
rsp.id = hdev->id; |
|
rsp.status = A2MP_STATUS_INVALID_CTRL_ID; |
|
|
|
if (hdev->amp_type != AMP_TYPE_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->remote_amp_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_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status) |
|
{ |
|
struct amp_mgr *mgr; |
|
struct a2mp_physlink_rsp rsp; |
|
struct hci_conn *hs_hcon; |
|
|
|
mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC); |
|
if (!mgr) |
|
return; |
|
|
|
memset(&rsp, 0, sizeof(rsp)); |
|
|
|
hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT); |
|
if (!hs_hcon) { |
|
rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; |
|
} else { |
|
rsp.remote_id = hs_hcon->remote_id; |
|
rsp.status = A2MP_STATUS_SUCCESS; |
|
} |
|
|
|
BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon, |
|
status); |
|
|
|
rsp.local_id = hdev->id; |
|
a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp); |
|
amp_mgr_put(mgr); |
|
} |
|
|
|
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; |
|
|
|
memset(&req, 0, sizeof(req)); |
|
|
|
req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); |
|
req.ext_feat = 0; |
|
a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); |
|
}
|
|
|