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 %u 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 %u type %u status %u", cl->id, cl->type,
225 if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) {
226 struct a2mp_info_req req;
230 memset(&req, 0, sizeof(req));
233 a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
238 cl = skb_pull(skb, sizeof(*cl));
241 /* Fall back to L2CAP init sequence */
243 struct l2cap_conn *conn = mgr->l2cap_conn;
244 struct l2cap_chan *chan;
246 mutex_lock(&conn->chan_lock);
248 list_for_each_entry(chan, &conn->chan_l, list) {
250 BT_DBG("chan %p state %s", chan,
251 state_to_string(chan->state));
253 if (chan->scid == L2CAP_CID_A2MP)
256 l2cap_chan_lock(chan);
258 if (chan->state == BT_CONNECT)
259 l2cap_send_conn_req(chan);
261 l2cap_chan_unlock(chan);
264 mutex_unlock(&conn->chan_lock);
270 static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb,
271 struct a2mp_cmd *hdr)
273 struct a2mp_cl *cl = (void *) skb->data;
275 while (skb->len >= sizeof(*cl)) {
276 BT_DBG("Controller id %u type %u status %u", cl->id, cl->type,
278 cl = skb_pull(skb, sizeof(*cl));
281 /* TODO send A2MP_CHANGE_RSP */
286 static void read_local_amp_info_complete(struct hci_dev *hdev, u8 status,
289 BT_DBG("%s status 0x%2.2x", hdev->name, status);
291 a2mp_send_getinfo_rsp(hdev);
294 static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
295 struct a2mp_cmd *hdr)
297 struct a2mp_info_req *req = (void *) skb->data;
298 struct hci_dev *hdev;
299 struct hci_request hreq;
302 if (le16_to_cpu(hdr->len) < sizeof(*req))
305 BT_DBG("id %u", req->id);
307 hdev = hci_dev_get(req->id);
308 if (!hdev || hdev->dev_type != HCI_AMP) {
309 struct a2mp_info_rsp rsp;
311 memset(&rsp, 0, sizeof(rsp));
314 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
316 a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp),
322 set_bit(READ_LOC_AMP_INFO, &mgr->state);
323 hci_req_init(&hreq, hdev);
324 hci_req_add(&hreq, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
325 err = hci_req_run(&hreq, read_local_amp_info_complete);
327 a2mp_send_getinfo_rsp(hdev);
333 skb_pull(skb, sizeof(*req));
337 static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
338 struct a2mp_cmd *hdr)
340 struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data;
341 struct a2mp_amp_assoc_req req;
342 struct amp_ctrl *ctrl;
344 if (le16_to_cpu(hdr->len) < sizeof(*rsp))
347 BT_DBG("id %u status 0x%2.2x", rsp->id, rsp->status);
352 ctrl = amp_ctrl_add(mgr, rsp->id);
356 memset(&req, 0, sizeof(req));
359 a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req),
362 skb_pull(skb, sizeof(*rsp));
366 static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
367 struct a2mp_cmd *hdr)
369 struct a2mp_amp_assoc_req *req = (void *) skb->data;
370 struct hci_dev *hdev;
373 if (le16_to_cpu(hdr->len) < sizeof(*req))
376 BT_DBG("id %u", req->id);
378 /* Make sure that other request is not processed */
379 tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
381 hdev = hci_dev_get(req->id);
382 if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) {
383 struct a2mp_amp_assoc_rsp rsp;
385 memset(&rsp, 0, sizeof(rsp));
389 rsp.status = A2MP_STATUS_COLLISION_OCCURED;
392 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
395 a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp),
401 amp_read_loc_assoc(hdev, mgr);
407 skb_pull(skb, sizeof(*req));
411 static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
412 struct a2mp_cmd *hdr)
414 struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data;
415 u16 len = le16_to_cpu(hdr->len);
416 struct hci_dev *hdev;
417 struct amp_ctrl *ctrl;
418 struct hci_conn *hcon;
421 if (len < sizeof(*rsp))
424 assoc_len = len - sizeof(*rsp);
426 BT_DBG("id %u status 0x%2.2x assoc len %zu", rsp->id, rsp->status,
432 /* Save remote ASSOC data */
433 ctrl = amp_ctrl_lookup(mgr, rsp->id);
437 assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL);
444 ctrl->assoc_len = assoc_len;
445 ctrl->assoc_rem_len = assoc_len;
446 ctrl->assoc_len_so_far = 0;
451 /* Create Phys Link */
452 hdev = hci_dev_get(rsp->id);
456 hcon = phylink_add(hdev, mgr, rsp->id, true);
460 BT_DBG("Created hcon %p: loc:%u -> rem:%u", hcon, hdev->id, rsp->id);
462 mgr->bredr_chan->remote_amp_id = rsp->id;
464 amp_create_phylink(hdev, mgr, hcon);
472 static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
473 struct a2mp_cmd *hdr)
475 struct a2mp_physlink_req *req = (void *) skb->data;
476 struct a2mp_physlink_rsp rsp;
477 struct hci_dev *hdev;
478 struct hci_conn *hcon;
479 struct amp_ctrl *ctrl;
481 if (le16_to_cpu(hdr->len) < sizeof(*req))
484 BT_DBG("local_id %u, remote_id %u", req->local_id, req->remote_id);
486 memset(&rsp, 0, sizeof(rsp));
488 rsp.local_id = req->remote_id;
489 rsp.remote_id = req->local_id;
491 hdev = hci_dev_get(req->remote_id);
492 if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) {
493 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
497 ctrl = amp_ctrl_lookup(mgr, rsp.remote_id);
499 ctrl = amp_ctrl_add(mgr, rsp.remote_id);
503 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
509 size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req);
512 assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL);
520 ctrl->assoc_len = assoc_len;
521 ctrl->assoc_rem_len = assoc_len;
522 ctrl->assoc_len_so_far = 0;
527 hcon = phylink_add(hdev, mgr, req->local_id, false);
529 amp_accept_phylink(hdev, mgr, hcon);
530 rsp.status = A2MP_STATUS_SUCCESS;
532 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
539 /* Reply error now and success after HCI Write Remote AMP Assoc
540 command complete with success status
542 if (rsp.status != A2MP_STATUS_SUCCESS) {
543 a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident,
546 set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state);
547 mgr->ident = hdr->ident;
550 skb_pull(skb, le16_to_cpu(hdr->len));
554 static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
555 struct a2mp_cmd *hdr)
557 struct a2mp_physlink_req *req = (void *) skb->data;
558 struct a2mp_physlink_rsp rsp;
559 struct hci_dev *hdev;
560 struct hci_conn *hcon;
562 if (le16_to_cpu(hdr->len) < sizeof(*req))
565 BT_DBG("local_id %u remote_id %u", req->local_id, req->remote_id);
567 memset(&rsp, 0, sizeof(rsp));
569 rsp.local_id = req->remote_id;
570 rsp.remote_id = req->local_id;
571 rsp.status = A2MP_STATUS_SUCCESS;
573 hdev = hci_dev_get(req->remote_id);
575 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
579 hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK,
580 &mgr->l2cap_conn->hcon->dst);
582 bt_dev_err(hdev, "no phys link exist");
583 rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS;
587 /* TODO Disconnect Phys Link here */
593 a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp);
595 skb_pull(skb, sizeof(*req));
599 static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
600 struct a2mp_cmd *hdr)
602 BT_DBG("ident %u code 0x%2.2x", hdr->ident, hdr->code);
604 skb_pull(skb, le16_to_cpu(hdr->len));
608 /* Handle A2MP signalling */
609 static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
611 struct a2mp_cmd *hdr;
612 struct amp_mgr *mgr = chan->data;
617 while (skb->len >= sizeof(*hdr)) {
620 hdr = (void *) skb->data;
621 len = le16_to_cpu(hdr->len);
623 BT_DBG("code 0x%2.2x id %u len %u", hdr->code, hdr->ident, len);
625 skb_pull(skb, sizeof(*hdr));
627 if (len > skb->len || !hdr->ident) {
632 mgr->ident = hdr->ident;
635 case A2MP_COMMAND_REJ:
636 a2mp_command_rej(mgr, skb, hdr);
639 case A2MP_DISCOVER_REQ:
640 err = a2mp_discover_req(mgr, skb, hdr);
643 case A2MP_CHANGE_NOTIFY:
644 err = a2mp_change_notify(mgr, skb, hdr);
647 case A2MP_GETINFO_REQ:
648 err = a2mp_getinfo_req(mgr, skb, hdr);
651 case A2MP_GETAMPASSOC_REQ:
652 err = a2mp_getampassoc_req(mgr, skb, hdr);
655 case A2MP_CREATEPHYSLINK_REQ:
656 err = a2mp_createphyslink_req(mgr, skb, hdr);
659 case A2MP_DISCONNPHYSLINK_REQ:
660 err = a2mp_discphyslink_req(mgr, skb, hdr);
663 case A2MP_DISCOVER_RSP:
664 err = a2mp_discover_rsp(mgr, skb, hdr);
667 case A2MP_GETINFO_RSP:
668 err = a2mp_getinfo_rsp(mgr, skb, hdr);
671 case A2MP_GETAMPASSOC_RSP:
672 err = a2mp_getampassoc_rsp(mgr, skb, hdr);
675 case A2MP_CHANGE_RSP:
676 case A2MP_CREATEPHYSLINK_RSP:
677 case A2MP_DISCONNPHYSLINK_RSP:
678 err = a2mp_cmd_rsp(mgr, skb, hdr);
682 BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code);
689 struct a2mp_cmd_rej rej;
691 memset(&rej, 0, sizeof(rej));
693 rej.reason = cpu_to_le16(0);
694 hdr = (void *) skb->data;
696 BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err);
698 a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej),
702 /* Always free skb and return success error code to prevent
703 from sending L2CAP Disconnect over A2MP channel */
711 static void a2mp_chan_close_cb(struct l2cap_chan *chan)
713 l2cap_chan_put(chan);
716 static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state,
719 struct amp_mgr *mgr = chan->data;
724 BT_DBG("chan %p state %s", chan, state_to_string(state));
736 static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan,
737 unsigned long hdr_len,
738 unsigned long len, int nb)
742 skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL);
744 return ERR_PTR(-ENOMEM);
749 static const struct l2cap_ops a2mp_chan_ops = {
750 .name = "L2CAP A2MP channel",
751 .recv = a2mp_chan_recv_cb,
752 .close = a2mp_chan_close_cb,
753 .state_change = a2mp_chan_state_change_cb,
754 .alloc_skb = a2mp_chan_alloc_skb_cb,
756 /* Not implemented for A2MP */
757 .new_connection = l2cap_chan_no_new_connection,
758 .teardown = l2cap_chan_no_teardown,
759 .ready = l2cap_chan_no_ready,
760 .defer = l2cap_chan_no_defer,
761 .resume = l2cap_chan_no_resume,
762 .set_shutdown = l2cap_chan_no_set_shutdown,
763 .get_sndtimeo = l2cap_chan_no_get_sndtimeo,
766 static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked)
768 struct l2cap_chan *chan;
771 chan = l2cap_chan_create();
775 BT_DBG("chan %p", chan);
777 chan->chan_type = L2CAP_CHAN_FIXED;
778 chan->scid = L2CAP_CID_A2MP;
779 chan->dcid = L2CAP_CID_A2MP;
780 chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
781 chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
782 chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
784 chan->ops = &a2mp_chan_ops;
786 l2cap_chan_set_defaults(chan);
787 chan->remote_max_tx = chan->max_tx;
788 chan->remote_tx_win = chan->tx_win;
790 chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
791 chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
793 skb_queue_head_init(&chan->tx_q);
795 chan->mode = L2CAP_MODE_ERTM;
797 err = l2cap_ertm_init(chan);
799 l2cap_chan_del(chan, 0);
803 chan->conf_state = 0;
806 __l2cap_chan_add(conn, chan);
808 l2cap_chan_add(conn, chan);
810 chan->remote_mps = chan->omtu;
811 chan->mps = chan->omtu;
813 chan->state = BT_CONNECTED;
818 /* AMP Manager functions */
819 struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr)
821 BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
823 kref_get(&mgr->kref);
828 static void amp_mgr_destroy(struct kref *kref)
830 struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref);
832 BT_DBG("mgr %p", mgr);
834 mutex_lock(&_mgr_list_lock);
835 list_del(&mgr->list);
836 mutex_unlock(&_mgr_list_lock);
838 amp_ctrl_list_flush(mgr);
842 int amp_mgr_put(struct amp_mgr *mgr)
844 BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
846 return kref_put(&mgr->kref, &_mgr_destroy);
849 static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked)
852 struct l2cap_chan *chan;
854 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
858 BT_DBG("conn %p mgr %p", conn, mgr);
860 mgr->l2cap_conn = conn;
862 chan = a2mp_chan_open(conn, locked);
868 mgr->a2mp_chan = chan;
871 conn->hcon->amp_mgr = mgr;
873 kref_init(&mgr->kref);
875 /* Remote AMP ctrl list initialization */
876 INIT_LIST_HEAD(&mgr->amp_ctrls);
877 mutex_init(&mgr->amp_ctrls_lock);
879 mutex_lock(&_mgr_list_lock);
880 list_add(&mgr->list, &_mgr_list);
881 mutex_unlock(&_mgr_list_lock);
886 struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
891 if (conn->hcon->type != ACL_LINK)
894 mgr = amp_mgr_create(conn, false);
896 BT_ERR("Could not create AMP manager");
900 BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan);
902 return mgr->a2mp_chan;
905 void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
908 struct a2mp_info_rsp rsp;
910 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO);
914 BT_DBG("%s mgr %p", hdev->name, mgr);
916 memset(&rsp, 0, sizeof(rsp));
919 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
921 if (hdev->amp_type != AMP_TYPE_BREDR) {
923 rsp.total_bw = cpu_to_le32(hdev->amp_total_bw);
924 rsp.max_bw = cpu_to_le32(hdev->amp_max_bw);
925 rsp.min_latency = cpu_to_le32(hdev->amp_min_latency);
926 rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap);
927 rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size);
930 a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp);
934 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status)
937 struct amp_assoc *loc_assoc = &hdev->loc_assoc;
938 struct a2mp_amp_assoc_rsp *rsp;
941 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
945 BT_DBG("%s mgr %p", hdev->name, mgr);
947 len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len;
948 rsp = kzalloc(len, GFP_KERNEL);
957 rsp->status = A2MP_STATUS_INVALID_CTRL_ID;
959 rsp->status = A2MP_STATUS_SUCCESS;
960 memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len);
963 a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp);
968 void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status)
971 struct amp_assoc *loc_assoc = &hdev->loc_assoc;
972 struct a2mp_physlink_req *req;
973 struct l2cap_chan *bredr_chan;
976 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL);
980 len = sizeof(*req) + loc_assoc->len;
982 BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len);
984 req = kzalloc(len, GFP_KERNEL);
990 bredr_chan = mgr->bredr_chan;
994 req->local_id = hdev->id;
995 req->remote_id = bredr_chan->remote_amp_id;
996 memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len);
998 a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req);
1005 void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status)
1007 struct amp_mgr *mgr;
1008 struct a2mp_physlink_rsp rsp;
1009 struct hci_conn *hs_hcon;
1011 mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC);
1015 memset(&rsp, 0, sizeof(rsp));
1017 hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT);
1019 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
1021 rsp.remote_id = hs_hcon->remote_id;
1022 rsp.status = A2MP_STATUS_SUCCESS;
1025 BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon,
1028 rsp.local_id = hdev->id;
1029 a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp);
1033 void a2mp_discover_amp(struct l2cap_chan *chan)
1035 struct l2cap_conn *conn = chan->conn;
1036 struct amp_mgr *mgr = conn->hcon->amp_mgr;
1037 struct a2mp_discov_req req;
1039 BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr);
1042 mgr = amp_mgr_create(conn, true);
1047 mgr->bredr_chan = chan;
1049 memset(&req, 0, sizeof(req));
1051 req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
1053 a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);