1 // SPDX-License-Identifier: GPL-2.0-only
3 Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved.
4 Copyright (c) 2011,2012 Intel Corp.
8 #include <net/bluetooth/bluetooth.h>
9 #include <net/bluetooth/hci_core.h>
10 #include <net/bluetooth/l2cap.h>
12 #include "hci_request.h"
16 #define A2MP_FEAT_EXT 0x8000
18 /* Global AMP Manager list */
19 static LIST_HEAD(amp_mgr_list);
20 static DEFINE_MUTEX(amp_mgr_list_lock);
22 /* A2MP build & send command helper functions */
23 static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
28 plen = sizeof(*cmd) + len;
29 cmd = kzalloc(plen, GFP_KERNEL);
35 cmd->len = cpu_to_le16(len);
37 memcpy(cmd->data, data, len);
42 static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data)
44 struct l2cap_chan *chan = mgr->a2mp_chan;
46 u16 total_len = len + sizeof(*cmd);
50 cmd = __a2mp_build(code, ident, len, data);
55 iv.iov_len = total_len;
57 memset(&msg, 0, sizeof(msg));
59 iov_iter_kvec(&msg.msg_iter, WRITE, &iv, 1, total_len);
61 l2cap_chan_send(chan, &msg, total_len);
66 static u8 __next_ident(struct amp_mgr *mgr)
68 if (++mgr->ident == 0)
74 static struct amp_mgr *amp_mgr_lookup_by_state(u8 state)
78 mutex_lock(&_mgr_list_lock);
79 list_for_each_entry(mgr, &_mgr_list, list) {
80 if (test_and_clear_bit(state, &mgr->state)) {
82 mutex_unlock(&_mgr_list_lock);
86 mutex_unlock(&_mgr_list_lock);
91 /* hci_dev_list shall be locked */
92 static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl)
97 cl[0].id = AMP_ID_BREDR;
98 cl[0].type = AMP_TYPE_BREDR;
99 cl[0].status = AMP_STATUS_BLUETOOTH_ONLY;
101 list_for_each_entry(hdev, &hci_dev_list, list) {
102 if (hdev->dev_type == HCI_AMP) {
104 cl[i].type = hdev->amp_type;
105 if (test_bit(HCI_UP, &hdev->flags))
106 cl[i].status = hdev->amp_status;
108 cl[i].status = AMP_STATUS_POWERED_DOWN;
114 /* Processing A2MP messages */
115 static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb,
116 struct a2mp_cmd *hdr)
118 struct a2mp_cmd_rej *rej = (void *) skb->data;
120 if (le16_to_cpu(hdr->len) < sizeof(*rej))
123 BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason));
125 skb_pull(skb, sizeof(*rej));
130 static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb,
131 struct a2mp_cmd *hdr)
133 struct a2mp_discov_req *req = (void *) skb->data;
134 u16 len = le16_to_cpu(hdr->len);
135 struct a2mp_discov_rsp *rsp;
138 struct hci_dev *hdev;
140 if (len < sizeof(*req))
143 skb_pull(skb, sizeof(*req));
145 ext_feat = le16_to_cpu(req->ext_feat);
147 BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat);
149 /* check that packet is not broken for now */
150 while (ext_feat & A2MP_FEAT_EXT) {
151 if (len < sizeof(ext_feat))
154 ext_feat = get_unaligned_le16(skb->data);
155 BT_DBG("efm 0x%4.4x", ext_feat);
156 len -= sizeof(ext_feat);
157 skb_pull(skb, sizeof(ext_feat));
160 read_lock(&hci_dev_list_lock);
162 /* at minimum the BR/EDR needs to be listed */
165 list_for_each_entry(hdev, &hci_dev_list, list) {
166 if (hdev->dev_type == HCI_AMP)
170 len = struct_size(rsp, cl, num_ctrl);
171 rsp = kmalloc(len, GFP_ATOMIC);
173 read_unlock(&hci_dev_list_lock);
177 rsp->mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
180 __a2mp_add_cl(mgr, rsp->cl);
182 read_unlock(&hci_dev_list_lock);
184 a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp);
190 static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
191 struct a2mp_cmd *hdr)
193 struct a2mp_discov_rsp *rsp = (void *) skb->data;
194 u16 len = le16_to_cpu(hdr->len);
199 if (len < sizeof(*rsp))
203 skb_pull(skb, sizeof(*rsp));
205 ext_feat = le16_to_cpu(rsp->ext_feat);
207 BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat);
209 /* check that packet is not broken for now */
210 while (ext_feat & A2MP_FEAT_EXT) {
211 if (len < sizeof(ext_feat))
214 ext_feat = get_unaligned_le16(skb->data);
215 BT_DBG("efm 0x%4.4x", ext_feat);
216 len -= sizeof(ext_feat);
217 skb_pull(skb, sizeof(ext_feat));
220 cl = (void *) skb->data;
221 while (len >= sizeof(*cl)) {
222 BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type,
225 if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) {
226 struct a2mp_info_req req;
230 a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
235 cl = skb_pull(skb, sizeof(*cl));
238 /* Fall back to L2CAP init sequence */
240 struct l2cap_conn *conn = mgr->l2cap_conn;
241 struct l2cap_chan *chan;
243 mutex_lock(&conn->chan_lock);
245 list_for_each_entry(chan, &conn->chan_l, list) {
247 BT_DBG("chan %p state %s", chan,
248 state_to_string(chan->state));
250 if (chan->scid == L2CAP_CID_A2MP)
253 l2cap_chan_lock(chan);
255 if (chan->state == BT_CONNECT)
256 l2cap_send_conn_req(chan);
258 l2cap_chan_unlock(chan);
261 mutex_unlock(&conn->chan_lock);
267 static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb,
268 struct a2mp_cmd *hdr)
270 struct a2mp_cl *cl = (void *) skb->data;
272 while (skb->len >= sizeof(*cl)) {
273 BT_DBG("Controller id %d type %d status %d", cl->id, cl->type,
275 cl = skb_pull(skb, sizeof(*cl));
278 /* TODO send A2MP_CHANGE_RSP */
283 static void read_local_amp_info_complete(struct hci_dev *hdev, u8 status,
286 BT_DBG("%s status 0x%2.2x", hdev->name, status);
288 a2mp_send_getinfo_rsp(hdev);
291 static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
292 struct a2mp_cmd *hdr)
294 struct a2mp_info_req *req = (void *) skb->data;
295 struct hci_dev *hdev;
296 struct hci_request hreq;
299 if (le16_to_cpu(hdr->len) < sizeof(*req))
302 BT_DBG("id %d", req->id);
304 hdev = hci_dev_get(req->id);
305 if (!hdev || hdev->dev_type != HCI_AMP) {
306 struct a2mp_info_rsp rsp;
309 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
311 a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp),
317 set_bit(READ_LOC_AMP_INFO, &mgr->state);
318 hci_req_init(&hreq, hdev);
319 hci_req_add(&hreq, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
320 err = hci_req_run(&hreq, read_local_amp_info_complete);
322 a2mp_send_getinfo_rsp(hdev);
328 skb_pull(skb, sizeof(*req));
332 static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
333 struct a2mp_cmd *hdr)
335 struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data;
336 struct a2mp_amp_assoc_req req;
337 struct amp_ctrl *ctrl;
339 if (le16_to_cpu(hdr->len) < sizeof(*rsp))
342 BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status);
347 ctrl = amp_ctrl_add(mgr, rsp->id);
352 a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req),
355 skb_pull(skb, sizeof(*rsp));
359 static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
360 struct a2mp_cmd *hdr)
362 struct a2mp_amp_assoc_req *req = (void *) skb->data;
363 struct hci_dev *hdev;
366 if (le16_to_cpu(hdr->len) < sizeof(*req))
369 BT_DBG("id %d", req->id);
371 /* Make sure that other request is not processed */
372 tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
374 hdev = hci_dev_get(req->id);
375 if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) {
376 struct a2mp_amp_assoc_rsp rsp;
380 rsp.status = A2MP_STATUS_COLLISION_OCCURED;
383 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
386 a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp),
392 amp_read_loc_assoc(hdev, mgr);
398 skb_pull(skb, sizeof(*req));
402 static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
403 struct a2mp_cmd *hdr)
405 struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data;
406 u16 len = le16_to_cpu(hdr->len);
407 struct hci_dev *hdev;
408 struct amp_ctrl *ctrl;
409 struct hci_conn *hcon;
412 if (len < sizeof(*rsp))
415 assoc_len = len - sizeof(*rsp);
417 BT_DBG("id %d status 0x%2.2x assoc len %zu", rsp->id, rsp->status,
423 /* Save remote ASSOC data */
424 ctrl = amp_ctrl_lookup(mgr, rsp->id);
428 assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL);
435 ctrl->assoc_len = assoc_len;
436 ctrl->assoc_rem_len = assoc_len;
437 ctrl->assoc_len_so_far = 0;
442 /* Create Phys Link */
443 hdev = hci_dev_get(rsp->id);
447 hcon = phylink_add(hdev, mgr, rsp->id, true);
451 BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id);
453 mgr->bredr_chan->remote_amp_id = rsp->id;
455 amp_create_phylink(hdev, mgr, hcon);
463 static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
464 struct a2mp_cmd *hdr)
466 struct a2mp_physlink_req *req = (void *) skb->data;
468 struct a2mp_physlink_rsp rsp;
469 struct hci_dev *hdev;
470 struct hci_conn *hcon;
471 struct amp_ctrl *ctrl;
473 if (le16_to_cpu(hdr->len) < sizeof(*req))
476 BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id);
478 rsp.local_id = req->remote_id;
479 rsp.remote_id = req->local_id;
481 hdev = hci_dev_get(req->remote_id);
482 if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) {
483 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
487 ctrl = amp_ctrl_lookup(mgr, rsp.remote_id);
489 ctrl = amp_ctrl_add(mgr, rsp.remote_id);
493 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
499 size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req);
502 assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL);
509 ctrl->assoc_len = assoc_len;
510 ctrl->assoc_rem_len = assoc_len;
511 ctrl->assoc_len_so_far = 0;
516 hcon = phylink_add(hdev, mgr, req->local_id, false);
518 amp_accept_phylink(hdev, mgr, hcon);
519 rsp.status = A2MP_STATUS_SUCCESS;
521 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
528 /* Reply error now and success after HCI Write Remote AMP Assoc
529 command complete with success status
531 if (rsp.status != A2MP_STATUS_SUCCESS) {
532 a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident,
535 set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state);
536 mgr->ident = hdr->ident;
539 skb_pull(skb, le16_to_cpu(hdr->len));
543 static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
544 struct a2mp_cmd *hdr)
546 struct a2mp_physlink_req *req = (void *) skb->data;
547 struct a2mp_physlink_rsp rsp;
548 struct hci_dev *hdev;
549 struct hci_conn *hcon;
551 if (le16_to_cpu(hdr->len) < sizeof(*req))
554 BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id);
556 rsp.local_id = req->remote_id;
557 rsp.remote_id = req->local_id;
558 rsp.status = A2MP_STATUS_SUCCESS;
560 hdev = hci_dev_get(req->remote_id);
562 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
566 hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK,
567 &mgr->l2cap_conn->hcon->dst);
569 bt_dev_err(hdev, "no phys link exist");
570 rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS;
574 /* TODO Disconnect Phys Link here */
580 a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp);
582 skb_pull(skb, sizeof(*req));
586 static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
587 struct a2mp_cmd *hdr)
589 BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code);
591 skb_pull(skb, le16_to_cpu(hdr->len));
595 /* Handle A2MP signalling */
596 static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
598 struct a2mp_cmd *hdr;
599 struct amp_mgr *mgr = chan->data;
604 while (skb->len >= sizeof(*hdr)) {
607 hdr = (void *) skb->data;
608 len = le16_to_cpu(hdr->len);
610 BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len);
612 skb_pull(skb, sizeof(*hdr));
614 if (len > skb->len || !hdr->ident) {
619 mgr->ident = hdr->ident;
622 case A2MP_COMMAND_REJ:
623 a2mp_command_rej(mgr, skb, hdr);
626 case A2MP_DISCOVER_REQ:
627 err = a2mp_discover_req(mgr, skb, hdr);
630 case A2MP_CHANGE_NOTIFY:
631 err = a2mp_change_notify(mgr, skb, hdr);
634 case A2MP_GETINFO_REQ:
635 err = a2mp_getinfo_req(mgr, skb, hdr);
638 case A2MP_GETAMPASSOC_REQ:
639 err = a2mp_getampassoc_req(mgr, skb, hdr);
642 case A2MP_CREATEPHYSLINK_REQ:
643 err = a2mp_createphyslink_req(mgr, skb, hdr);
646 case A2MP_DISCONNPHYSLINK_REQ:
647 err = a2mp_discphyslink_req(mgr, skb, hdr);
650 case A2MP_DISCOVER_RSP:
651 err = a2mp_discover_rsp(mgr, skb, hdr);
654 case A2MP_GETINFO_RSP:
655 err = a2mp_getinfo_rsp(mgr, skb, hdr);
658 case A2MP_GETAMPASSOC_RSP:
659 err = a2mp_getampassoc_rsp(mgr, skb, hdr);
662 case A2MP_CHANGE_RSP:
663 case A2MP_CREATEPHYSLINK_RSP:
664 case A2MP_DISCONNPHYSLINK_RSP:
665 err = a2mp_cmd_rsp(mgr, skb, hdr);
669 BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code);
676 struct a2mp_cmd_rej rej;
678 rej.reason = cpu_to_le16(0);
679 hdr = (void *) skb->data;
681 BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err);
683 a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej),
687 /* Always free skb and return success error code to prevent
688 from sending L2CAP Disconnect over A2MP channel */
696 static void a2mp_chan_close_cb(struct l2cap_chan *chan)
698 l2cap_chan_put(chan);
701 static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state,
704 struct amp_mgr *mgr = chan->data;
709 BT_DBG("chan %p state %s", chan, state_to_string(state));
721 static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan,
722 unsigned long hdr_len,
723 unsigned long len, int nb)
727 skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL);
729 return ERR_PTR(-ENOMEM);
734 static const struct l2cap_ops a2mp_chan_ops = {
735 .name = "L2CAP A2MP channel",
736 .recv = a2mp_chan_recv_cb,
737 .close = a2mp_chan_close_cb,
738 .state_change = a2mp_chan_state_change_cb,
739 .alloc_skb = a2mp_chan_alloc_skb_cb,
741 /* Not implemented for A2MP */
742 .new_connection = l2cap_chan_no_new_connection,
743 .teardown = l2cap_chan_no_teardown,
744 .ready = l2cap_chan_no_ready,
745 .defer = l2cap_chan_no_defer,
746 .resume = l2cap_chan_no_resume,
747 .set_shutdown = l2cap_chan_no_set_shutdown,
748 .get_sndtimeo = l2cap_chan_no_get_sndtimeo,
751 static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked)
753 struct l2cap_chan *chan;
756 chan = l2cap_chan_create();
760 BT_DBG("chan %p", chan);
762 chan->chan_type = L2CAP_CHAN_FIXED;
763 chan->scid = L2CAP_CID_A2MP;
764 chan->dcid = L2CAP_CID_A2MP;
765 chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
766 chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
767 chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
769 chan->ops = &a2mp_chan_ops;
771 l2cap_chan_set_defaults(chan);
772 chan->remote_max_tx = chan->max_tx;
773 chan->remote_tx_win = chan->tx_win;
775 chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
776 chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
778 skb_queue_head_init(&chan->tx_q);
780 chan->mode = L2CAP_MODE_ERTM;
782 err = l2cap_ertm_init(chan);
784 l2cap_chan_del(chan, 0);
788 chan->conf_state = 0;
791 __l2cap_chan_add(conn, chan);
793 l2cap_chan_add(conn, chan);
795 chan->remote_mps = chan->omtu;
796 chan->mps = chan->omtu;
798 chan->state = BT_CONNECTED;
803 /* AMP Manager functions */
804 struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr)
806 BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
808 kref_get(&mgr->kref);
813 static void amp_mgr_destroy(struct kref *kref)
815 struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref);
817 BT_DBG("mgr %p", mgr);
819 mutex_lock(&_mgr_list_lock);
820 list_del(&mgr->list);
821 mutex_unlock(&_mgr_list_lock);
823 amp_ctrl_list_flush(mgr);
827 int amp_mgr_put(struct amp_mgr *mgr)
829 BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
831 return kref_put(&mgr->kref, &_mgr_destroy);
834 static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked)
837 struct l2cap_chan *chan;
839 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
843 BT_DBG("conn %p mgr %p", conn, mgr);
845 mgr->l2cap_conn = conn;
847 chan = a2mp_chan_open(conn, locked);
853 mgr->a2mp_chan = chan;
856 conn->hcon->amp_mgr = mgr;
858 kref_init(&mgr->kref);
860 /* Remote AMP ctrl list initialization */
861 INIT_LIST_HEAD(&mgr->amp_ctrls);
862 mutex_init(&mgr->amp_ctrls_lock);
864 mutex_lock(&_mgr_list_lock);
865 list_add(&mgr->list, &_mgr_list);
866 mutex_unlock(&_mgr_list_lock);
871 struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
876 if (conn->hcon->type != ACL_LINK)
879 mgr = amp_mgr_create(conn, false);
881 BT_ERR("Could not create AMP manager");
885 BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan);
887 return mgr->a2mp_chan;
890 void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
893 struct a2mp_info_rsp rsp;
895 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO);
899 BT_DBG("%s mgr %p", hdev->name, mgr);
902 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
904 if (hdev->amp_type != AMP_TYPE_BREDR) {
906 rsp.total_bw = cpu_to_le32(hdev->amp_total_bw);
907 rsp.max_bw = cpu_to_le32(hdev->amp_max_bw);
908 rsp.min_latency = cpu_to_le32(hdev->amp_min_latency);
909 rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap);
910 rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size);
913 a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp);
917 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status)
920 struct amp_assoc *loc_assoc = &hdev->loc_assoc;
921 struct a2mp_amp_assoc_rsp *rsp;
924 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
928 BT_DBG("%s mgr %p", hdev->name, mgr);
930 len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len;
931 rsp = kzalloc(len, GFP_KERNEL);
940 rsp->status = A2MP_STATUS_INVALID_CTRL_ID;
942 rsp->status = A2MP_STATUS_SUCCESS;
943 memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len);
946 a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp);
951 void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status)
954 struct amp_assoc *loc_assoc = &hdev->loc_assoc;
955 struct a2mp_physlink_req *req;
956 struct l2cap_chan *bredr_chan;
959 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL);
963 len = sizeof(*req) + loc_assoc->len;
965 BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len);
967 req = kzalloc(len, GFP_KERNEL);
973 bredr_chan = mgr->bredr_chan;
977 req->local_id = hdev->id;
978 req->remote_id = bredr_chan->remote_amp_id;
979 memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len);
981 a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req);
988 void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status)
991 struct a2mp_physlink_rsp rsp;
992 struct hci_conn *hs_hcon;
994 mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC);
998 hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT);
1000 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
1002 rsp.remote_id = hs_hcon->remote_id;
1003 rsp.status = A2MP_STATUS_SUCCESS;
1006 BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon,
1009 rsp.local_id = hdev->id;
1010 a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp);
1014 void a2mp_discover_amp(struct l2cap_chan *chan)
1016 struct l2cap_conn *conn = chan->conn;
1017 struct amp_mgr *mgr = conn->hcon->amp_mgr;
1018 struct a2mp_discov_req req;
1020 BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr);
1023 mgr = amp_mgr_create(conn, true);
1028 mgr->bredr_chan = chan;
1030 req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
1032 a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);