net/bluetooth/a2mp.c

   1 /*
   2    Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
   3    Copyright (c) 2011,2012 Intel Corp.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License version 2 and
   7    only version 2 as published by the Free Software Foundation.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13 */
  14
  15 #include <net/bluetooth/bluetooth.h>
  16 #include <net/bluetooth/hci_core.h>
  17 #include <net/bluetooth/l2cap.h>
  18 #include <net/bluetooth/a2mp.h>
  19 #include <net/bluetooth/amp.h>
  20
  21 /* Global AMP Manager list */
  22 LIST_HEAD(amp_mgr_list);
  23 DEFINE_MUTEX(amp_mgr_list_lock);
  24
  25 /* A2MP build & send command helper functions */
  26 static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
  27 {
  28         struct a2mp_cmd *cmd;
  29         int plen;
  30
  31         plen = sizeof(*cmd) + len;
  32         cmd = kzalloc(plen, GFP_KERNEL);
  33         if (!cmd)
  34                 return NULL;
  35
  36         cmd->code = code;
  37         cmd->ident = ident;
  38         cmd->len = cpu_to_le16(len);
  39
  40         memcpy(cmd->data, data, len);
  41
  42         return cmd;
  43 }
  44
  45 void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data)
  46 {
  47         struct l2cap_chan *chan = mgr->a2mp_chan;
  48         struct a2mp_cmd *cmd;
  49         u16 total_len = len + sizeof(*cmd);
  50         struct kvec iv;
  51         struct msghdr msg;
  52
  53         cmd = __a2mp_build(code, ident, len, data);
  54         if (!cmd)
  55                 return;
  56
  57         iv.iov_base = cmd;
  58         iv.iov_len = total_len;
  59
  60         memset(&msg, 0, sizeof(msg));
  61
  62         msg.msg_iov = (struct iovec *) &iv;
  63         msg.msg_iovlen = 1;
  64
  65         l2cap_chan_send(chan, &msg, total_len, 0);
  66
  67         kfree(cmd);
  68 }
  69
  70 static u8 __next_ident(struct amp_mgr *mgr)
  71 {
  72         if (++mgr->ident == 0)
  73                 mgr->ident = 1;
  74
  75         return mgr->ident;
  76 }
  77
  78 static inline void __a2mp_cl_bredr(struct a2mp_cl *cl)
  79 {
  80         cl->id = 0;
  81         cl->type = 0;
  82         cl->status = 1;
  83 }
  84
  85 /* hci_dev_list shall be locked */
  86 static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl, u8 num_ctrl)
  87 {
  88         int i = 0;
  89         struct hci_dev *hdev;
  90
  91         __a2mp_cl_bredr(cl);
  92
  93         list_for_each_entry(hdev, &hci_dev_list, list) {
  94                 /* Iterate through AMP controllers */
  95                 if (hdev->id == HCI_BREDR_ID)
  96                         continue;
  97
  98                 /* Starting from second entry */
  99                 if (++i >= num_ctrl)
 100                         return;
 101
 102                 cl[i].id = hdev->id;
 103                 cl[i].type = hdev->amp_type;
 104                 cl[i].status = hdev->amp_status;
 105         }
 106 }
 107
 108 /* Processing A2MP messages */
 109 static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb,
 110                             struct a2mp_cmd *hdr)
 111 {
 112         struct a2mp_cmd_rej *rej = (void *) skb->data;
 113
 114         if (le16_to_cpu(hdr->len) < sizeof(*rej))
 115                 return -EINVAL;
 116
 117         BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason));
 118
 119         skb_pull(skb, sizeof(*rej));
 120
 121         return 0;
 122 }
 123
 124 static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb,
 125                              struct a2mp_cmd *hdr)
 126 {
 127         struct a2mp_discov_req *req = (void *) skb->data;
 128         u16 len = le16_to_cpu(hdr->len);
 129         struct a2mp_discov_rsp *rsp;
 130         u16 ext_feat;
 131         u8 num_ctrl;
 132
 133         if (len < sizeof(*req))
 134                 return -EINVAL;
 135
 136         skb_pull(skb, sizeof(*req));
 137
 138         ext_feat = le16_to_cpu(req->ext_feat);
 139
 140         BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat);
 141
 142         /* check that packet is not broken for now */
 143         while (ext_feat & A2MP_FEAT_EXT) {
 144                 if (len < sizeof(ext_feat))
 145                         return -EINVAL;
 146
 147                 ext_feat = get_unaligned_le16(skb->data);
 148                 BT_DBG("efm 0x%4.4x", ext_feat);
 149                 len -= sizeof(ext_feat);
 150                 skb_pull(skb, sizeof(ext_feat));
 151         }
 152
 153         read_lock(&hci_dev_list_lock);
 154
 155         num_ctrl = __hci_num_ctrl();
 156         len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp);
 157         rsp = kmalloc(len, GFP_ATOMIC);
 158         if (!rsp) {
 159                 read_unlock(&hci_dev_list_lock);
 160                 return -ENOMEM;
 161         }
 162
 163         rsp->mtu = __constant_cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
 164         rsp->ext_feat = 0;
 165
 166         __a2mp_add_cl(mgr, rsp->cl, num_ctrl);
 167
 168         read_unlock(&hci_dev_list_lock);
 169
 170         a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp);
 171
 172         kfree(rsp);
 173         return 0;
 174 }
 175
 176 static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
 177                              struct a2mp_cmd *hdr)
 178 {
 179         struct a2mp_discov_rsp *rsp = (void *) skb->data;
 180         u16 len = le16_to_cpu(hdr->len);
 181         struct a2mp_cl *cl;
 182         u16 ext_feat;
 183
 184         if (len < sizeof(*rsp))
 185                 return -EINVAL;
 186
 187         len -= sizeof(*rsp);
 188         skb_pull(skb, sizeof(*rsp));
 189
 190         ext_feat = le16_to_cpu(rsp->ext_feat);
 191
 192         BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat);
 193
 194         /* check that packet is not broken for now */
 195         while (ext_feat & A2MP_FEAT_EXT) {
 196                 if (len < sizeof(ext_feat))
 197                         return -EINVAL;
 198
 199                 ext_feat = get_unaligned_le16(skb->data);
 200                 BT_DBG("efm 0x%4.4x", ext_feat);
 201                 len -= sizeof(ext_feat);
 202                 skb_pull(skb, sizeof(ext_feat));
 203         }
 204
 205         cl = (void *) skb->data;
 206         while (len >= sizeof(*cl)) {
 207                 BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type,
 208                        cl->status);
 209
 210                 if (cl->id != HCI_BREDR_ID && cl->type == HCI_AMP) {
 211                         struct a2mp_info_req req;
 212
 213                         req.id = cl->id;
 214                         a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
 215                                   sizeof(req), &req);
 216                 }
 217
 218                 len -= sizeof(*cl);
 219                 cl = (void *) skb_pull(skb, sizeof(*cl));
 220         }
 221
 222         return 0;
 223 }
 224
 225 static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb,
 226                               struct a2mp_cmd *hdr)
 227 {
 228         struct a2mp_cl *cl = (void *) skb->data;
 229
 230         while (skb->len >= sizeof(*cl)) {
 231                 BT_DBG("Controller id %d type %d status %d", cl->id, cl->type,
 232                        cl->status);
 233                 cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl));
 234         }
 235
 236         /* TODO send A2MP_CHANGE_RSP */
 237
 238         return 0;
 239 }
 240
 241 static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
 242                             struct a2mp_cmd *hdr)
 243 {
 244         struct a2mp_info_req *req  = (void *) skb->data;
 245         struct hci_dev *hdev;
 246
 247         if (le16_to_cpu(hdr->len) < sizeof(*req))
 248                 return -EINVAL;
 249
 250         BT_DBG("id %d", req->id);
 251
 252         hdev = hci_dev_get(req->id);
 253         if (!hdev) {
 254                 struct a2mp_info_rsp rsp;
 255
 256                 rsp.id = req->id;
 257                 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
 258
 259                 a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp),
 260                           &rsp);
 261         }
 262
 263         if (hdev->dev_type != HCI_BREDR) {
 264                 mgr->state = READ_LOC_AMP_INFO;
 265                 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
 266         }
 267
 268         hci_dev_put(hdev);
 269
 270         skb_pull(skb, sizeof(*req));
 271         return 0;
 272 }
 273
 274 static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
 275                                 struct a2mp_cmd *hdr)
 276 {
 277         struct a2mp_amp_assoc_req *req = (void *) skb->data;
 278         struct hci_dev *hdev;
 279         struct amp_mgr *tmp;
 280
 281         if (le16_to_cpu(hdr->len) < sizeof(*req))
 282                 return -EINVAL;
 283
 284         BT_DBG("id %d", req->id);
 285
 286         /* Make sure that other request is not processed */
 287         tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
 288
 289         hdev = hci_dev_get(req->id);
 290         if (!hdev || hdev->amp_type == HCI_BREDR || tmp) {
 291                 struct a2mp_amp_assoc_rsp rsp;
 292                 rsp.id = req->id;
 293
 294                 if (tmp) {
 295                         rsp.status = A2MP_STATUS_COLLISION_OCCURED;
 296                         amp_mgr_put(tmp);
 297                 } else {
 298                         rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
 299                 }
 300
 301                 a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp),
 302                           &rsp);
 303
 304                 goto done;
 305         }
 306
 307         amp_read_loc_assoc(hdev, mgr);
 308
 309 done:
 310         if (hdev)
 311                 hci_dev_put(hdev);
 312
 313         skb_pull(skb, sizeof(*req));
 314         return 0;
 315 }
 316
 317 static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
 318                                    struct a2mp_cmd *hdr)
 319 {
 320         struct a2mp_physlink_req *req = (void *) skb->data;
 321
 322         struct a2mp_physlink_rsp rsp;
 323         struct hci_dev *hdev;
 324
 325         if (le16_to_cpu(hdr->len) < sizeof(*req))
 326                 return -EINVAL;
 327
 328         BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id);
 329
 330         rsp.local_id = req->remote_id;
 331         rsp.remote_id = req->local_id;
 332
 333         hdev = hci_dev_get(req->remote_id);
 334         if (!hdev || hdev->amp_type != HCI_AMP) {
 335                 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
 336                 goto send_rsp;
 337         }
 338
 339         /* TODO process physlink create */
 340
 341         rsp.status = A2MP_STATUS_SUCCESS;
 342
 343 send_rsp:
 344         if (hdev)
 345                 hci_dev_put(hdev);
 346
 347         a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, sizeof(rsp),
 348                   &rsp);
 349
 350         skb_pull(skb, le16_to_cpu(hdr->len));
 351         return 0;
 352 }
 353
 354 static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
 355                                  struct a2mp_cmd *hdr)
 356 {
 357         struct a2mp_physlink_req *req = (void *) skb->data;
 358         struct a2mp_physlink_rsp rsp;
 359         struct hci_dev *hdev;
 360
 361         if (le16_to_cpu(hdr->len) < sizeof(*req))
 362                 return -EINVAL;
 363
 364         BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id);
 365
 366         rsp.local_id = req->remote_id;
 367         rsp.remote_id = req->local_id;
 368         rsp.status = A2MP_STATUS_SUCCESS;
 369
 370         hdev = hci_dev_get(req->local_id);
 371         if (!hdev) {
 372                 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
 373                 goto send_rsp;
 374         }
 375
 376         /* TODO Disconnect Phys Link here */
 377
 378         hci_dev_put(hdev);
 379
 380 send_rsp:
 381         a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp);
 382
 383         skb_pull(skb, sizeof(*req));
 384         return 0;
 385 }
 386
 387 static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
 388                                struct a2mp_cmd *hdr)
 389 {
 390         BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code);
 391
 392         skb_pull(skb, le16_to_cpu(hdr->len));
 393         return 0;
 394 }
 395
 396 /* Handle A2MP signalling */
 397 static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
 398 {
 399         struct a2mp_cmd *hdr;
 400         struct amp_mgr *mgr = chan->data;
 401         int err = 0;
 402
 403         amp_mgr_get(mgr);
 404
 405         while (skb->len >= sizeof(*hdr)) {
 406                 u16 len;
 407
 408                 hdr = (void *) skb->data;
 409                 len = le16_to_cpu(hdr->len);
 410
 411                 BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len);
 412
 413                 skb_pull(skb, sizeof(*hdr));
 414
 415                 if (len > skb->len || !hdr->ident) {
 416                         err = -EINVAL;
 417                         break;
 418                 }
 419
 420                 mgr->ident = hdr->ident;
 421
 422                 switch (hdr->code) {
 423                 case A2MP_COMMAND_REJ:
 424                         a2mp_command_rej(mgr, skb, hdr);
 425                         break;
 426
 427                 case A2MP_DISCOVER_REQ:
 428                         err = a2mp_discover_req(mgr, skb, hdr);
 429                         break;
 430
 431                 case A2MP_CHANGE_NOTIFY:
 432                         err = a2mp_change_notify(mgr, skb, hdr);
 433                         break;
 434
 435                 case A2MP_GETINFO_REQ:
 436                         err = a2mp_getinfo_req(mgr, skb, hdr);
 437                         break;
 438
 439                 case A2MP_GETAMPASSOC_REQ:
 440                         err = a2mp_getampassoc_req(mgr, skb, hdr);
 441                         break;
 442
 443                 case A2MP_CREATEPHYSLINK_REQ:
 444                         err = a2mp_createphyslink_req(mgr, skb, hdr);
 445                         break;
 446
 447                 case A2MP_DISCONNPHYSLINK_REQ:
 448                         err = a2mp_discphyslink_req(mgr, skb, hdr);
 449                         break;
 450
 451                 case A2MP_DISCOVER_RSP:
 452                         err = a2mp_discover_rsp(mgr, skb, hdr);
 453                         break;
 454
 455                 case A2MP_CHANGE_RSP:
 456                 case A2MP_GETINFO_RSP:
 457                 case A2MP_GETAMPASSOC_RSP:
 458                 case A2MP_CREATEPHYSLINK_RSP:
 459                 case A2MP_DISCONNPHYSLINK_RSP:
 460                         err = a2mp_cmd_rsp(mgr, skb, hdr);
 461                         break;
 462
 463                 default:
 464                         BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code);
 465                         err = -EINVAL;
 466                         break;
 467                 }
 468         }
 469
 470         if (err) {
 471                 struct a2mp_cmd_rej rej;
 472
 473                 rej.reason = __constant_cpu_to_le16(0);
 474                 hdr = (void *) skb->data;
 475
 476                 BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err);
 477
 478                 a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej),
 479                           &rej);
 480         }
 481
 482         /* Always free skb and return success error code to prevent
 483            from sending L2CAP Disconnect over A2MP channel */
 484         kfree_skb(skb);
 485
 486         amp_mgr_put(mgr);
 487
 488         return 0;
 489 }
 490
 491 static void a2mp_chan_close_cb(struct l2cap_chan *chan)
 492 {
 493         l2cap_chan_put(chan);
 494 }
 495
 496 static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state)
 497 {
 498         struct amp_mgr *mgr = chan->data;
 499
 500         if (!mgr)
 501                 return;
 502
 503         BT_DBG("chan %p state %s", chan, state_to_string(state));
 504
 505         chan->state = state;
 506
 507         switch (state) {
 508         case BT_CLOSED:
 509                 if (mgr)
 510                         amp_mgr_put(mgr);
 511                 break;
 512         }
 513 }
 514
 515 static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan,
 516                                               unsigned long len, int nb)
 517 {
 518         return bt_skb_alloc(len, GFP_KERNEL);
 519 }
 520
 521 static struct l2cap_ops a2mp_chan_ops = {
 522         .name = "L2CAP A2MP channel",
 523         .recv = a2mp_chan_recv_cb,
 524         .close = a2mp_chan_close_cb,
 525         .state_change = a2mp_chan_state_change_cb,
 526         .alloc_skb = a2mp_chan_alloc_skb_cb,
 527
 528         /* Not implemented for A2MP */
 529         .new_connection = l2cap_chan_no_new_connection,
 530         .teardown = l2cap_chan_no_teardown,
 531         .ready = l2cap_chan_no_ready,
 532 };
 533
 534 static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn)
 535 {
 536         struct l2cap_chan *chan;
 537         int err;
 538
 539         chan = l2cap_chan_create();
 540         if (!chan)
 541                 return NULL;
 542
 543         BT_DBG("chan %p", chan);
 544
 545         chan->chan_type = L2CAP_CHAN_CONN_FIX_A2MP;
 546         chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
 547
 548         chan->ops = &a2mp_chan_ops;
 549
 550         l2cap_chan_set_defaults(chan);
 551         chan->remote_max_tx = chan->max_tx;
 552         chan->remote_tx_win = chan->tx_win;
 553
 554         chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
 555         chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
 556
 557         skb_queue_head_init(&chan->tx_q);
 558
 559         chan->mode = L2CAP_MODE_ERTM;
 560
 561         err = l2cap_ertm_init(chan);
 562         if (err < 0) {
 563                 l2cap_chan_del(chan, 0);
 564                 return NULL;
 565         }
 566
 567         chan->conf_state = 0;
 568
 569         l2cap_chan_add(conn, chan);
 570
 571         chan->remote_mps = chan->omtu;
 572         chan->mps = chan->omtu;
 573
 574         chan->state = BT_CONNECTED;
 575
 576         return chan;
 577 }
 578
 579 /* AMP Manager functions */
 580 void amp_mgr_get(struct amp_mgr *mgr)
 581 {
 582         BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount));
 583
 584         kref_get(&mgr->kref);
 585 }
 586
 587 static void amp_mgr_destroy(struct kref *kref)
 588 {
 589         struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref);
 590
 591         BT_DBG("mgr %p", mgr);
 592
 593         mutex_lock(&amp_mgr_list_lock);
 594         list_del(&mgr->list);
 595         mutex_unlock(&amp_mgr_list_lock);
 596
 597         kfree(mgr);
 598 }
 599
 600 int amp_mgr_put(struct amp_mgr *mgr)
 601 {
 602         BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount));
 603
 604         return kref_put(&mgr->kref, &amp_mgr_destroy);
 605 }
 606
 607 static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn)
 608 {
 609         struct amp_mgr *mgr;
 610         struct l2cap_chan *chan;
 611
 612         mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
 613         if (!mgr)
 614                 return NULL;
 615
 616         BT_DBG("conn %p mgr %p", conn, mgr);
 617
 618         mgr->l2cap_conn = conn;
 619
 620         chan = a2mp_chan_open(conn);
 621         if (!chan) {
 622                 kfree(mgr);
 623                 return NULL;
 624         }
 625
 626         mgr->a2mp_chan = chan;
 627         chan->data = mgr;
 628
 629         conn->hcon->amp_mgr = mgr;
 630
 631         kref_init(&mgr->kref);
 632
 633         mutex_lock(&amp_mgr_list_lock);
 634         list_add(&mgr->list, &amp_mgr_list);
 635         mutex_unlock(&amp_mgr_list_lock);
 636
 637         return mgr;
 638 }
 639
 640 struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
 641                                        struct sk_buff *skb)
 642 {
 643         struct amp_mgr *mgr;
 644
 645         mgr = amp_mgr_create(conn);
 646         if (!mgr) {
 647                 BT_ERR("Could not create AMP manager");
 648                 return NULL;
 649         }
 650
 651         BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan);
 652
 653         return mgr->a2mp_chan;
 654 }
 655
 656 struct amp_mgr *amp_mgr_lookup_by_state(u8 state)
 657 {
 658         struct amp_mgr *mgr;
 659
 660         mutex_lock(&amp_mgr_list_lock);
 661         list_for_each_entry(mgr, &amp_mgr_list, list) {
 662                 if (mgr->state == state) {
 663                         amp_mgr_get(mgr);
 664                         mutex_unlock(&amp_mgr_list_lock);
 665                         return mgr;
 666                 }
 667         }
 668         mutex_unlock(&amp_mgr_list_lock);
 669
 670         return NULL;
 671 }
 672
 673 void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
 674 {
 675         struct amp_mgr *mgr;
 676         struct a2mp_info_rsp rsp;
 677
 678         mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO);
 679         if (!mgr)
 680                 return;
 681
 682         BT_DBG("%s mgr %p", hdev->name, mgr);
 683
 684         rsp.id = hdev->id;
 685         rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
 686
 687         if (hdev->amp_type != HCI_BREDR) {
 688                 rsp.status = 0;
 689                 rsp.total_bw = cpu_to_le32(hdev->amp_total_bw);
 690                 rsp.max_bw = cpu_to_le32(hdev->amp_max_bw);
 691                 rsp.min_latency = cpu_to_le32(hdev->amp_min_latency);
 692                 rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap);
 693                 rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size);
 694         }
 695
 696         a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp);
 697         amp_mgr_put(mgr);
 698 }
 699
 700 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status)
 701 {
 702         struct amp_mgr *mgr;
 703         struct amp_assoc *loc_assoc = &hdev->loc_assoc;
 704         struct a2mp_amp_assoc_rsp *rsp;
 705         size_t len;
 706
 707         mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
 708         if (!mgr)
 709                 return;
 710
 711         BT_DBG("%s mgr %p", hdev->name, mgr);
 712
 713         len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len;
 714         rsp = kzalloc(len, GFP_KERNEL);
 715         if (!rsp) {
 716                 amp_mgr_put(mgr);
 717                 return;
 718         }
 719
 720         rsp->id = hdev->id;
 721
 722         if (status) {
 723                 rsp->status = A2MP_STATUS_INVALID_CTRL_ID;
 724         } else {
 725                 rsp->status = A2MP_STATUS_SUCCESS;
 726                 memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len);
 727         }
 728
 729         a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp);
 730         amp_mgr_put(mgr);
 731         kfree(rsp);
 732 }