2 Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved.
3 Copyright (c) 2011,2012 Intel Corp.
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.
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.
15 #include <net/bluetooth/bluetooth.h>
16 #include <net/bluetooth/hci_core.h>
17 #include <net/bluetooth/l2cap.h>
19 #include "hci_request.h"
23 #define A2MP_FEAT_EXT 0x8000
25 /* Global AMP Manager list */
26 static LIST_HEAD(amp_mgr_list);
27 static DEFINE_MUTEX(amp_mgr_list_lock);
29 /* A2MP build & send command helper functions */
30 static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
35 plen = sizeof(*cmd) + len;
36 cmd = kzalloc(plen, GFP_KERNEL);
42 cmd->len = cpu_to_le16(len);
44 memcpy(cmd->data, data, len);
49 static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data)
51 struct l2cap_chan *chan = mgr->a2mp_chan;
53 u16 total_len = len + sizeof(*cmd);
57 cmd = __a2mp_build(code, ident, len, data);
62 iv.iov_len = total_len;
64 memset(&msg, 0, sizeof(msg));
66 iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iv, 1, total_len);
68 l2cap_chan_send(chan, &msg, total_len);
73 static u8 __next_ident(struct amp_mgr *mgr)
75 if (++mgr->ident == 0)
81 static struct amp_mgr *amp_mgr_lookup_by_state(u8 state)
85 mutex_lock(&_mgr_list_lock);
86 list_for_each_entry(mgr, &_mgr_list, list) {
87 if (test_and_clear_bit(state, &mgr->state)) {
89 mutex_unlock(&_mgr_list_lock);
93 mutex_unlock(&_mgr_list_lock);
98 /* hci_dev_list shall be locked */
99 static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl)
101 struct hci_dev *hdev;
104 cl[0].id = AMP_ID_BREDR;
105 cl[0].type = AMP_TYPE_BREDR;
106 cl[0].status = AMP_STATUS_BLUETOOTH_ONLY;
108 list_for_each_entry(hdev, &hci_dev_list, list) {
109 if (hdev->dev_type == HCI_AMP) {
111 cl[i].type = hdev->amp_type;
112 if (test_bit(HCI_UP, &hdev->flags))
113 cl[i].status = hdev->amp_status;
115 cl[i].status = AMP_STATUS_POWERED_DOWN;
121 /* Processing A2MP messages */
122 static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb,
123 struct a2mp_cmd *hdr)
125 struct a2mp_cmd_rej *rej = (void *) skb->data;
127 if (le16_to_cpu(hdr->len) < sizeof(*rej))
130 BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason));
132 skb_pull(skb, sizeof(*rej));
137 static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb,
138 struct a2mp_cmd *hdr)
140 struct a2mp_discov_req *req = (void *) skb->data;
141 u16 len = le16_to_cpu(hdr->len);
142 struct a2mp_discov_rsp *rsp;
145 struct hci_dev *hdev;
147 if (len < sizeof(*req))
150 skb_pull(skb, sizeof(*req));
152 ext_feat = le16_to_cpu(req->ext_feat);
154 BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat);
156 /* check that packet is not broken for now */
157 while (ext_feat & A2MP_FEAT_EXT) {
158 if (len < sizeof(ext_feat))
161 ext_feat = get_unaligned_le16(skb->data);
162 BT_DBG("efm 0x%4.4x", ext_feat);
163 len -= sizeof(ext_feat);
164 skb_pull(skb, sizeof(ext_feat));
167 read_lock(&hci_dev_list_lock);
169 /* at minimum the BR/EDR needs to be listed */
172 list_for_each_entry(hdev, &hci_dev_list, list) {
173 if (hdev->dev_type == HCI_AMP)
177 len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp);
178 rsp = kmalloc(len, GFP_ATOMIC);
180 read_unlock(&hci_dev_list_lock);
184 rsp->mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
187 __a2mp_add_cl(mgr, rsp->cl);
189 read_unlock(&hci_dev_list_lock);
191 a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp);
197 static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
198 struct a2mp_cmd *hdr)
200 struct a2mp_discov_rsp *rsp = (void *) skb->data;
201 u16 len = le16_to_cpu(hdr->len);
206 if (len < sizeof(*rsp))
210 skb_pull(skb, sizeof(*rsp));
212 ext_feat = le16_to_cpu(rsp->ext_feat);
214 BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat);
216 /* check that packet is not broken for now */
217 while (ext_feat & A2MP_FEAT_EXT) {
218 if (len < sizeof(ext_feat))
221 ext_feat = get_unaligned_le16(skb->data);
222 BT_DBG("efm 0x%4.4x", ext_feat);
223 len -= sizeof(ext_feat);
224 skb_pull(skb, sizeof(ext_feat));
227 cl = (void *) skb->data;
228 while (len >= sizeof(*cl)) {
229 BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type,
232 if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) {
233 struct a2mp_info_req req;
237 memset(&req, 0, sizeof(req));
240 a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
245 cl = (void *) skb_pull(skb, sizeof(*cl));
248 /* Fall back to L2CAP init sequence */
250 struct l2cap_conn *conn = mgr->l2cap_conn;
251 struct l2cap_chan *chan;
253 mutex_lock(&conn->chan_lock);
255 list_for_each_entry(chan, &conn->chan_l, list) {
257 BT_DBG("chan %p state %s", chan,
258 state_to_string(chan->state));
260 if (chan->scid == L2CAP_CID_A2MP)
263 l2cap_chan_lock(chan);
265 if (chan->state == BT_CONNECT)
266 l2cap_send_conn_req(chan);
268 l2cap_chan_unlock(chan);
271 mutex_unlock(&conn->chan_lock);
277 static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb,
278 struct a2mp_cmd *hdr)
280 struct a2mp_cl *cl = (void *) skb->data;
282 while (skb->len >= sizeof(*cl)) {
283 BT_DBG("Controller id %d type %d status %d", cl->id, cl->type,
285 cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl));
288 /* TODO send A2MP_CHANGE_RSP */
293 static void read_local_amp_info_complete(struct hci_dev *hdev, u8 status,
296 BT_DBG("%s status 0x%2.2x", hdev->name, status);
298 a2mp_send_getinfo_rsp(hdev);
301 static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
302 struct a2mp_cmd *hdr)
304 struct a2mp_info_req *req = (void *) skb->data;
305 struct hci_dev *hdev;
306 struct hci_request hreq;
309 if (le16_to_cpu(hdr->len) < sizeof(*req))
312 BT_DBG("id %d", req->id);
314 hdev = hci_dev_get(req->id);
315 if (!hdev || hdev->dev_type != HCI_AMP) {
316 struct a2mp_info_rsp rsp;
318 memset(&rsp, 0, sizeof(rsp));
321 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
323 a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp),
329 set_bit(READ_LOC_AMP_INFO, &mgr->state);
330 hci_req_init(&hreq, hdev);
331 hci_req_add(&hreq, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
332 err = hci_req_run(&hreq, read_local_amp_info_complete);
334 a2mp_send_getinfo_rsp(hdev);
340 skb_pull(skb, sizeof(*req));
344 static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
345 struct a2mp_cmd *hdr)
347 struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data;
348 struct a2mp_amp_assoc_req req;
349 struct amp_ctrl *ctrl;
351 if (le16_to_cpu(hdr->len) < sizeof(*rsp))
354 BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status);
359 ctrl = amp_ctrl_add(mgr, rsp->id);
363 memset(&req, 0, sizeof(req));
366 a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req),
369 skb_pull(skb, sizeof(*rsp));
373 static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
374 struct a2mp_cmd *hdr)
376 struct a2mp_amp_assoc_req *req = (void *) skb->data;
377 struct hci_dev *hdev;
380 if (le16_to_cpu(hdr->len) < sizeof(*req))
383 BT_DBG("id %d", req->id);
385 /* Make sure that other request is not processed */
386 tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
388 hdev = hci_dev_get(req->id);
389 if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) {
390 struct a2mp_amp_assoc_rsp rsp;
392 memset(&rsp, 0, sizeof(rsp));
396 rsp.status = A2MP_STATUS_COLLISION_OCCURED;
399 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
402 a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp),
408 amp_read_loc_assoc(hdev, mgr);
414 skb_pull(skb, sizeof(*req));
418 static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
419 struct a2mp_cmd *hdr)
421 struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data;
422 u16 len = le16_to_cpu(hdr->len);
423 struct hci_dev *hdev;
424 struct amp_ctrl *ctrl;
425 struct hci_conn *hcon;
428 if (len < sizeof(*rsp))
431 assoc_len = len - sizeof(*rsp);
433 BT_DBG("id %d status 0x%2.2x assoc len %zu", rsp->id, rsp->status,
439 /* Save remote ASSOC data */
440 ctrl = amp_ctrl_lookup(mgr, rsp->id);
444 assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL);
451 ctrl->assoc_len = assoc_len;
452 ctrl->assoc_rem_len = assoc_len;
453 ctrl->assoc_len_so_far = 0;
458 /* Create Phys Link */
459 hdev = hci_dev_get(rsp->id);
463 hcon = phylink_add(hdev, mgr, rsp->id, true);
467 BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id);
469 mgr->bredr_chan->remote_amp_id = rsp->id;
471 amp_create_phylink(hdev, mgr, hcon);
479 static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
480 struct a2mp_cmd *hdr)
482 struct a2mp_physlink_req *req = (void *) skb->data;
483 struct a2mp_physlink_rsp rsp;
484 struct hci_dev *hdev;
485 struct hci_conn *hcon;
486 struct amp_ctrl *ctrl;
488 if (le16_to_cpu(hdr->len) < sizeof(*req))
491 BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id);
493 memset(&rsp, 0, sizeof(rsp));
495 rsp.local_id = req->remote_id;
496 rsp.remote_id = req->local_id;
498 hdev = hci_dev_get(req->remote_id);
499 if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) {
500 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
504 ctrl = amp_ctrl_lookup(mgr, rsp.remote_id);
506 ctrl = amp_ctrl_add(mgr, rsp.remote_id);
510 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
516 size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req);
519 assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL);
527 ctrl->assoc_len = assoc_len;
528 ctrl->assoc_rem_len = assoc_len;
529 ctrl->assoc_len_so_far = 0;
534 hcon = phylink_add(hdev, mgr, req->local_id, false);
536 amp_accept_phylink(hdev, mgr, hcon);
537 rsp.status = A2MP_STATUS_SUCCESS;
539 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
546 /* Reply error now and success after HCI Write Remote AMP Assoc
547 command complete with success status
549 if (rsp.status != A2MP_STATUS_SUCCESS) {
550 a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident,
553 set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state);
554 mgr->ident = hdr->ident;
557 skb_pull(skb, le16_to_cpu(hdr->len));
561 static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
562 struct a2mp_cmd *hdr)
564 struct a2mp_physlink_req *req = (void *) skb->data;
565 struct a2mp_physlink_rsp rsp;
566 struct hci_dev *hdev;
567 struct hci_conn *hcon;
569 if (le16_to_cpu(hdr->len) < sizeof(*req))
572 BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id);
574 memset(&rsp, 0, sizeof(rsp));
576 rsp.local_id = req->remote_id;
577 rsp.remote_id = req->local_id;
578 rsp.status = A2MP_STATUS_SUCCESS;
580 hdev = hci_dev_get(req->remote_id);
582 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
586 hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK,
587 &mgr->l2cap_conn->hcon->dst);
589 BT_ERR("No phys link exist");
590 rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS;
594 /* TODO Disconnect Phys Link here */
600 a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp);
602 skb_pull(skb, sizeof(*req));
606 static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
607 struct a2mp_cmd *hdr)
609 BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code);
611 skb_pull(skb, le16_to_cpu(hdr->len));
615 /* Handle A2MP signalling */
616 static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
618 struct a2mp_cmd *hdr;
619 struct amp_mgr *mgr = chan->data;
624 while (skb->len >= sizeof(*hdr)) {
627 hdr = (void *) skb->data;
628 len = le16_to_cpu(hdr->len);
630 BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len);
632 skb_pull(skb, sizeof(*hdr));
634 if (len > skb->len || !hdr->ident) {
639 mgr->ident = hdr->ident;
642 case A2MP_COMMAND_REJ:
643 a2mp_command_rej(mgr, skb, hdr);
646 case A2MP_DISCOVER_REQ:
647 err = a2mp_discover_req(mgr, skb, hdr);
650 case A2MP_CHANGE_NOTIFY:
651 err = a2mp_change_notify(mgr, skb, hdr);
654 case A2MP_GETINFO_REQ:
655 err = a2mp_getinfo_req(mgr, skb, hdr);
658 case A2MP_GETAMPASSOC_REQ:
659 err = a2mp_getampassoc_req(mgr, skb, hdr);
662 case A2MP_CREATEPHYSLINK_REQ:
663 err = a2mp_createphyslink_req(mgr, skb, hdr);
666 case A2MP_DISCONNPHYSLINK_REQ:
667 err = a2mp_discphyslink_req(mgr, skb, hdr);
670 case A2MP_DISCOVER_RSP:
671 err = a2mp_discover_rsp(mgr, skb, hdr);
674 case A2MP_GETINFO_RSP:
675 err = a2mp_getinfo_rsp(mgr, skb, hdr);
678 case A2MP_GETAMPASSOC_RSP:
679 err = a2mp_getampassoc_rsp(mgr, skb, hdr);
682 case A2MP_CHANGE_RSP:
683 case A2MP_CREATEPHYSLINK_RSP:
684 case A2MP_DISCONNPHYSLINK_RSP:
685 err = a2mp_cmd_rsp(mgr, skb, hdr);
689 BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code);
696 struct a2mp_cmd_rej rej;
698 memset(&rej, 0, sizeof(rej));
700 rej.reason = cpu_to_le16(0);
701 hdr = (void *) skb->data;
703 BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err);
705 a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej),
709 /* Always free skb and return success error code to prevent
710 from sending L2CAP Disconnect over A2MP channel */
718 static void a2mp_chan_close_cb(struct l2cap_chan *chan)
720 l2cap_chan_put(chan);
723 static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state,
726 struct amp_mgr *mgr = chan->data;
731 BT_DBG("chan %p state %s", chan, state_to_string(state));
743 static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan,
744 unsigned long hdr_len,
745 unsigned long len, int nb)
749 skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL);
751 return ERR_PTR(-ENOMEM);
756 static const struct l2cap_ops a2mp_chan_ops = {
757 .name = "L2CAP A2MP channel",
758 .recv = a2mp_chan_recv_cb,
759 .close = a2mp_chan_close_cb,
760 .state_change = a2mp_chan_state_change_cb,
761 .alloc_skb = a2mp_chan_alloc_skb_cb,
763 /* Not implemented for A2MP */
764 .new_connection = l2cap_chan_no_new_connection,
765 .teardown = l2cap_chan_no_teardown,
766 .ready = l2cap_chan_no_ready,
767 .defer = l2cap_chan_no_defer,
768 .resume = l2cap_chan_no_resume,
769 .set_shutdown = l2cap_chan_no_set_shutdown,
770 .get_sndtimeo = l2cap_chan_no_get_sndtimeo,
773 static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked)
775 struct l2cap_chan *chan;
778 chan = l2cap_chan_create();
782 BT_DBG("chan %p", chan);
784 chan->chan_type = L2CAP_CHAN_FIXED;
785 chan->scid = L2CAP_CID_A2MP;
786 chan->dcid = L2CAP_CID_A2MP;
787 chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
788 chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
789 chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
791 chan->ops = &a2mp_chan_ops;
793 l2cap_chan_set_defaults(chan);
794 chan->remote_max_tx = chan->max_tx;
795 chan->remote_tx_win = chan->tx_win;
797 chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
798 chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
800 skb_queue_head_init(&chan->tx_q);
802 chan->mode = L2CAP_MODE_ERTM;
804 err = l2cap_ertm_init(chan);
806 l2cap_chan_del(chan, 0);
810 chan->conf_state = 0;
813 __l2cap_chan_add(conn, chan);
815 l2cap_chan_add(conn, chan);
817 chan->remote_mps = chan->omtu;
818 chan->mps = chan->omtu;
820 chan->state = BT_CONNECTED;
825 /* AMP Manager functions */
826 struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr)
828 BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount));
830 kref_get(&mgr->kref);
835 static void amp_mgr_destroy(struct kref *kref)
837 struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref);
839 BT_DBG("mgr %p", mgr);
841 mutex_lock(&_mgr_list_lock);
842 list_del(&mgr->list);
843 mutex_unlock(&_mgr_list_lock);
845 amp_ctrl_list_flush(mgr);
849 int amp_mgr_put(struct amp_mgr *mgr)
851 BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount));
853 return kref_put(&mgr->kref, &_mgr_destroy);
856 static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked)
859 struct l2cap_chan *chan;
861 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
865 BT_DBG("conn %p mgr %p", conn, mgr);
867 mgr->l2cap_conn = conn;
869 chan = a2mp_chan_open(conn, locked);
875 mgr->a2mp_chan = chan;
878 conn->hcon->amp_mgr = mgr;
880 kref_init(&mgr->kref);
882 /* Remote AMP ctrl list initialization */
883 INIT_LIST_HEAD(&mgr->amp_ctrls);
884 mutex_init(&mgr->amp_ctrls_lock);
886 mutex_lock(&_mgr_list_lock);
887 list_add(&mgr->list, &_mgr_list);
888 mutex_unlock(&_mgr_list_lock);
893 struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
898 if (conn->hcon->type != ACL_LINK)
901 mgr = amp_mgr_create(conn, false);
903 BT_ERR("Could not create AMP manager");
907 BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan);
909 return mgr->a2mp_chan;
912 void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
915 struct a2mp_info_rsp rsp;
917 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO);
921 BT_DBG("%s mgr %p", hdev->name, mgr);
923 memset(&rsp, 0, sizeof(rsp));
926 rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
928 if (hdev->amp_type != AMP_TYPE_BREDR) {
930 rsp.total_bw = cpu_to_le32(hdev->amp_total_bw);
931 rsp.max_bw = cpu_to_le32(hdev->amp_max_bw);
932 rsp.min_latency = cpu_to_le32(hdev->amp_min_latency);
933 rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap);
934 rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size);
937 a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp);
941 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status)
944 struct amp_assoc *loc_assoc = &hdev->loc_assoc;
945 struct a2mp_amp_assoc_rsp *rsp;
948 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
952 BT_DBG("%s mgr %p", hdev->name, mgr);
954 len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len;
955 rsp = kzalloc(len, GFP_KERNEL);
964 rsp->status = A2MP_STATUS_INVALID_CTRL_ID;
966 rsp->status = A2MP_STATUS_SUCCESS;
967 memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len);
970 a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp);
975 void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status)
978 struct amp_assoc *loc_assoc = &hdev->loc_assoc;
979 struct a2mp_physlink_req *req;
980 struct l2cap_chan *bredr_chan;
983 mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL);
987 len = sizeof(*req) + loc_assoc->len;
989 BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len);
991 req = kzalloc(len, GFP_KERNEL);
997 bredr_chan = mgr->bredr_chan;
1001 req->local_id = hdev->id;
1002 req->remote_id = bredr_chan->remote_amp_id;
1003 memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len);
1005 a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req);
1012 void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status)
1014 struct amp_mgr *mgr;
1015 struct a2mp_physlink_rsp rsp;
1016 struct hci_conn *hs_hcon;
1018 mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC);
1022 memset(&rsp, 0, sizeof(rsp));
1024 hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT);
1026 rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
1028 rsp.remote_id = hs_hcon->remote_id;
1029 rsp.status = A2MP_STATUS_SUCCESS;
1032 BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon,
1035 rsp.local_id = hdev->id;
1036 a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp);
1040 void a2mp_discover_amp(struct l2cap_chan *chan)
1042 struct l2cap_conn *conn = chan->conn;
1043 struct amp_mgr *mgr = conn->hcon->amp_mgr;
1044 struct a2mp_discov_req req;
1046 BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr);
1049 mgr = amp_mgr_create(conn, true);
1054 mgr->bredr_chan = chan;
1056 memset(&req, 0, sizeof(req));
1058 req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
1060 a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);