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perf build: Get rid of LIB_INCLUDE variable
[linux/fpc-iii.git] / net / nfc / nci / hci.c
blobed54ec533836323f2013d9e452a910a397c62a85
1 /*
2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
4 * This is the HCI over NCI implementation, as specified in the 10.2
5 * section of the NCI 1.1 specification.
6 *
7 * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 *
21 */
22
23 #include <linux/skbuff.h>
24
25 #include "../nfc.h"
26 #include <net/nfc/nci.h>
27 #include <net/nfc/nci_core.h>
28 #include <linux/nfc.h>
29
30 struct nci_data {
31 u8 conn_id;
32 u8 pipe;
33 u8 cmd;
34 const u8 *data;
35 u32 data_len;
36 } __packed;
37
38 struct nci_hci_create_pipe_params {
39 u8 src_gate;
40 u8 dest_host;
41 u8 dest_gate;
42 } __packed;
43
44 struct nci_hci_create_pipe_resp {
45 u8 src_host;
46 u8 src_gate;
47 u8 dest_host;
48 u8 dest_gate;
49 u8 pipe;
50 } __packed;
51
52 struct nci_hci_delete_pipe_noti {
53 u8 pipe;
54 } __packed;
55
56 struct nci_hci_all_pipe_cleared_noti {
57 u8 host;
58 } __packed;
59
60 struct nci_hcp_message {
61 u8 header; /* type -cmd,evt,rsp- + instruction */
62 u8 data[];
63 } __packed;
64
65 struct nci_hcp_packet {
66 u8 header; /* cbit+pipe */
67 struct nci_hcp_message message;
68 } __packed;
69
70 #define NCI_HCI_ANY_SET_PARAMETER 0x01
71 #define NCI_HCI_ANY_GET_PARAMETER 0x02
72 #define NCI_HCI_ANY_CLOSE_PIPE 0x04
73
74 #define NCI_HFP_NO_CHAINING 0x80
75
76 #define NCI_NFCEE_ID_HCI 0x80
77
78 #define NCI_EVT_HOT_PLUG 0x03
79
80 #define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01
81
82 /* HCP headers */
83 #define NCI_HCI_HCP_PACKET_HEADER_LEN 1
84 #define NCI_HCI_HCP_MESSAGE_HEADER_LEN 1
85 #define NCI_HCI_HCP_HEADER_LEN 2
86
87 /* HCP types */
88 #define NCI_HCI_HCP_COMMAND 0x00
89 #define NCI_HCI_HCP_EVENT 0x01
90 #define NCI_HCI_HCP_RESPONSE 0x02
91
92 #define NCI_HCI_ADM_NOTIFY_PIPE_CREATED 0x12
93 #define NCI_HCI_ADM_NOTIFY_PIPE_DELETED 0x13
94 #define NCI_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED 0x15
95
96 #define NCI_HCI_FRAGMENT 0x7f
97 #define NCI_HCP_HEADER(type, instr) ((((type) & 0x03) << 6) |\
98 ((instr) & 0x3f))
99
100 #define NCI_HCP_MSG_GET_TYPE(header) ((header & 0xc0) >> 6)
101 #define NCI_HCP_MSG_GET_CMD(header) (header & 0x3f)
102 #define NCI_HCP_MSG_GET_PIPE(header) (header & 0x7f)
103
104 /* HCI core */
105 static void nci_hci_reset_pipes(struct nci_hci_dev *hdev)
106 {
107 int i;
108
109 for (i = 0; i < NCI_HCI_MAX_PIPES; i++) {
110 hdev->pipes[i].gate = NCI_HCI_INVALID_GATE;
111 hdev->pipes[i].host = NCI_HCI_INVALID_HOST;
112 }
113 memset(hdev->gate2pipe, NCI_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
114 }
115
116 static void nci_hci_reset_pipes_per_host(struct nci_dev *ndev, u8 host)
117 {
118 int i;
119
120 for (i = 0; i < NCI_HCI_MAX_PIPES; i++) {
121 if (ndev->hci_dev->pipes[i].host == host) {
122 ndev->hci_dev->pipes[i].gate = NCI_HCI_INVALID_GATE;
123 ndev->hci_dev->pipes[i].host = NCI_HCI_INVALID_HOST;
124 }
125 }
126 }
127
128 /* Fragment HCI data over NCI packet.
129 * NFC Forum NCI 10.2.2 Data Exchange:
130 * The payload of the Data Packets sent on the Logical Connection SHALL be
131 * valid HCP packets, as defined within [ETSI_102622]. Each Data Packet SHALL
132 * contain a single HCP packet. NCI Segmentation and Reassembly SHALL NOT be
133 * applied to Data Messages in either direction. The HCI fragmentation mechanism
134 * is used if required.
135 */
136 static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
137 const u8 data_type, const u8 *data,
138 size_t data_len)
139 {
140 struct nci_conn_info *conn_info;
141 struct sk_buff *skb;
142 int len, i, r;
143 u8 cb = pipe;
144
145 conn_info = ndev->hci_dev->conn_info;
146 if (!conn_info)
147 return -EPROTO;
148
149 skb = nci_skb_alloc(ndev, 2 + conn_info->max_pkt_payload_len +
150 NCI_DATA_HDR_SIZE, GFP_KERNEL);
151 if (!skb)
152 return -ENOMEM;
153
154 skb_reserve(skb, 2 + NCI_DATA_HDR_SIZE);
155 *skb_push(skb, 1) = data_type;
156
157 i = 0;
158 len = conn_info->max_pkt_payload_len;
159
160 do {
161 /* If last packet add NCI_HFP_NO_CHAINING */
162 if (i + conn_info->max_pkt_payload_len -
163 (skb->len + 1) >= data_len) {
164 cb |= NCI_HFP_NO_CHAINING;
165 len = data_len - i;
166 } else {
167 len = conn_info->max_pkt_payload_len - skb->len - 1;
168 }
169
170 *skb_push(skb, 1) = cb;
171
172 if (len > 0)
173 memcpy(skb_put(skb, len), data + i, len);
174
175 r = nci_send_data(ndev, conn_info->conn_id, skb);
176 if (r < 0)
177 return r;
178
179 i += len;
180 if (i < data_len) {
181 skb_trim(skb, 0);
182 skb_pull(skb, len);
183 }
184 } while (i < data_len);
185
186 return i;
187 }
188
189 static void nci_hci_send_data_req(struct nci_dev *ndev, unsigned long opt)
190 {
191 struct nci_data *data = (struct nci_data *)opt;
192
193 nci_hci_send_data(ndev, data->pipe, data->cmd,
194 data->data, data->data_len);
195 }
196
197 int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,
198 const u8 *param, size_t param_len)
199 {
200 u8 pipe = ndev->hci_dev->gate2pipe[gate];
201
202 if (pipe == NCI_HCI_INVALID_PIPE)
203 return -EADDRNOTAVAIL;
204
205 return nci_hci_send_data(ndev, pipe,
206 NCI_HCP_HEADER(NCI_HCI_HCP_EVENT, event),
207 param, param_len);
208 }
209 EXPORT_SYMBOL(nci_hci_send_event);
210
211 int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, u8 cmd,
212 const u8 *param, size_t param_len,
213 struct sk_buff **skb)
214 {
215 struct nci_conn_info *conn_info;
216 struct nci_data data;
217 int r;
218 u8 pipe = ndev->hci_dev->gate2pipe[gate];
219
220 if (pipe == NCI_HCI_INVALID_PIPE)
221 return -EADDRNOTAVAIL;
222
223 conn_info = ndev->hci_dev->conn_info;
224 if (!conn_info)
225 return -EPROTO;
226
227 data.conn_id = conn_info->conn_id;
228 data.pipe = pipe;
229 data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND, cmd);
230 data.data = param;
231 data.data_len = param_len;
232
233 r = nci_request(ndev, nci_hci_send_data_req, (unsigned long)&data,
234 msecs_to_jiffies(NCI_DATA_TIMEOUT));
235
236 if (r == NCI_STATUS_OK)
237 *skb = conn_info->rx_skb;
238
239 return r;
240 }
241 EXPORT_SYMBOL(nci_hci_send_cmd);
242
243 static void nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
244 u8 event, struct sk_buff *skb)
245 {
246 if (ndev->ops->hci_event_received)
247 ndev->ops->hci_event_received(ndev, pipe, event, skb);
248 }
249
250 static void nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe,
251 u8 cmd, struct sk_buff *skb)
252 {
253 u8 gate = ndev->hci_dev->pipes[pipe].gate;
254 u8 status = NCI_HCI_ANY_OK | ~NCI_HCI_FRAGMENT;
255 u8 dest_gate, new_pipe;
256 struct nci_hci_create_pipe_resp *create_info;
257 struct nci_hci_delete_pipe_noti *delete_info;
258 struct nci_hci_all_pipe_cleared_noti *cleared_info;
259
260 pr_debug("from gate %x pipe %x cmd %x\n", gate, pipe, cmd);
261
262 switch (cmd) {
263 case NCI_HCI_ADM_NOTIFY_PIPE_CREATED:
264 if (skb->len != 5) {
265 status = NCI_HCI_ANY_E_NOK;
266 goto exit;
267 }
268 create_info = (struct nci_hci_create_pipe_resp *)skb->data;
269 dest_gate = create_info->dest_gate;
270 new_pipe = create_info->pipe;
271
272 /* Save the new created pipe and bind with local gate,
273 * the description for skb->data[3] is destination gate id
274 * but since we received this cmd from host controller, we
275 * are the destination and it is our local gate
276 */
277 ndev->hci_dev->gate2pipe[dest_gate] = new_pipe;
278 ndev->hci_dev->pipes[new_pipe].gate = dest_gate;
279 ndev->hci_dev->pipes[new_pipe].host =
280 create_info->src_host;
281 break;
282 case NCI_HCI_ANY_OPEN_PIPE:
283 /* If the pipe is not created report an error */
284 if (gate == NCI_HCI_INVALID_GATE) {
285 status = NCI_HCI_ANY_E_NOK;
286 goto exit;
287 }
288 break;
289 case NCI_HCI_ADM_NOTIFY_PIPE_DELETED:
290 if (skb->len != 1) {
291 status = NCI_HCI_ANY_E_NOK;
292 goto exit;
293 }
294 delete_info = (struct nci_hci_delete_pipe_noti *)skb->data;
295
296 ndev->hci_dev->pipes[delete_info->pipe].gate =
297 NCI_HCI_INVALID_GATE;
298 ndev->hci_dev->pipes[delete_info->pipe].host =
299 NCI_HCI_INVALID_HOST;
300 break;
301 case NCI_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED:
302 if (skb->len != 1) {
303 status = NCI_HCI_ANY_E_NOK;
304 goto exit;
305 }
306
307 cleared_info =
308 (struct nci_hci_all_pipe_cleared_noti *)skb->data;
309 nci_hci_reset_pipes_per_host(ndev, cleared_info->host);
310 break;
311 default:
312 pr_debug("Discarded unknown cmd %x to gate %x\n", cmd, gate);
313 break;
314 }
315
316 if (ndev->ops->hci_cmd_received)
317 ndev->ops->hci_cmd_received(ndev, pipe, cmd, skb);
318
319 exit:
320 nci_hci_send_data(ndev, pipe, status, NULL, 0);
321
322 kfree_skb(skb);
323 }
324
325 static void nci_hci_resp_received(struct nci_dev *ndev, u8 pipe,
326 u8 result, struct sk_buff *skb)
327 {
328 struct nci_conn_info *conn_info;
329 u8 status = result;
330
331 if (result != NCI_HCI_ANY_OK)
332 goto exit;
333
334 conn_info = ndev->hci_dev->conn_info;
335 if (!conn_info) {
336 status = NCI_STATUS_REJECTED;
337 goto exit;
338 }
339
340 conn_info->rx_skb = skb;
341
342 exit:
343 nci_req_complete(ndev, status);
344 }
345
346 /* Receive hcp message for pipe, with type and cmd.
347 * skb contains optional message data only.
348 */
349 static void nci_hci_hcp_message_rx(struct nci_dev *ndev, u8 pipe,
350 u8 type, u8 instruction, struct sk_buff *skb)
351 {
352 switch (type) {
353 case NCI_HCI_HCP_RESPONSE:
354 nci_hci_resp_received(ndev, pipe, instruction, skb);
355 break;
356 case NCI_HCI_HCP_COMMAND:
357 nci_hci_cmd_received(ndev, pipe, instruction, skb);
358 break;
359 case NCI_HCI_HCP_EVENT:
360 nci_hci_event_received(ndev, pipe, instruction, skb);
361 break;
362 default:
363 pr_err("UNKNOWN MSG Type %d, instruction=%d\n",
364 type, instruction);
365 kfree_skb(skb);
366 break;
367 }
368
369 nci_req_complete(ndev, 0);
370 }
371
372 static void nci_hci_msg_rx_work(struct work_struct *work)
373 {
374 struct nci_hci_dev *hdev =
375 container_of(work, struct nci_hci_dev, msg_rx_work);
376 struct sk_buff *skb;
377 struct nci_hcp_message *message;
378 u8 pipe, type, instruction;
379
380 while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) {
381 pipe = skb->data[0];
382 skb_pull(skb, NCI_HCI_HCP_PACKET_HEADER_LEN);
383 message = (struct nci_hcp_message *)skb->data;
384 type = NCI_HCP_MSG_GET_TYPE(message->header);
385 instruction = NCI_HCP_MSG_GET_CMD(message->header);
386 skb_pull(skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN);
387
388 nci_hci_hcp_message_rx(hdev->ndev, pipe,
389 type, instruction, skb);
390 }
391 }
392
393 void nci_hci_data_received_cb(void *context,
394 struct sk_buff *skb, int err)
395 {
396 struct nci_dev *ndev = (struct nci_dev *)context;
397 struct nci_hcp_packet *packet;
398 u8 pipe, type, instruction;
399 struct sk_buff *hcp_skb;
400 struct sk_buff *frag_skb;
401 int msg_len;
402
403 pr_debug("\n");
404
405 if (err) {
406 nci_req_complete(ndev, err);
407 return;
408 }
409
410 packet = (struct nci_hcp_packet *)skb->data;
411 if ((packet->header & ~NCI_HCI_FRAGMENT) == 0) {
412 skb_queue_tail(&ndev->hci_dev->rx_hcp_frags, skb);
413 return;
414 }
415
416 /* it's the last fragment. Does it need re-aggregation? */
417 if (skb_queue_len(&ndev->hci_dev->rx_hcp_frags)) {
418 pipe = packet->header & NCI_HCI_FRAGMENT;
419 skb_queue_tail(&ndev->hci_dev->rx_hcp_frags, skb);
420
421 msg_len = 0;
422 skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) {
423 msg_len += (frag_skb->len -
424 NCI_HCI_HCP_PACKET_HEADER_LEN);
425 }
426
427 hcp_skb = nfc_alloc_recv_skb(NCI_HCI_HCP_PACKET_HEADER_LEN +
428 msg_len, GFP_KERNEL);
429 if (!hcp_skb) {
430 nci_req_complete(ndev, -ENOMEM);
431 return;
432 }
433
434 *skb_put(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN) = pipe;
435
436 skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) {
437 msg_len = frag_skb->len - NCI_HCI_HCP_PACKET_HEADER_LEN;
438 memcpy(skb_put(hcp_skb, msg_len), frag_skb->data +
439 NCI_HCI_HCP_PACKET_HEADER_LEN, msg_len);
440 }
441
442 skb_queue_purge(&ndev->hci_dev->rx_hcp_frags);
443 } else {
444 packet->header &= NCI_HCI_FRAGMENT;
445 hcp_skb = skb;
446 }
447
448 /* if this is a response, dispatch immediately to
449 * unblock waiting cmd context. Otherwise, enqueue to dispatch
450 * in separate context where handler can also execute command.
451 */
452 packet = (struct nci_hcp_packet *)hcp_skb->data;
453 type = NCI_HCP_MSG_GET_TYPE(packet->message.header);
454 if (type == NCI_HCI_HCP_RESPONSE) {
455 pipe = packet->header;
456 instruction = NCI_HCP_MSG_GET_CMD(packet->message.header);
457 skb_pull(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN +
458 NCI_HCI_HCP_MESSAGE_HEADER_LEN);
459 nci_hci_hcp_message_rx(ndev, pipe, type, instruction, hcp_skb);
460 } else {
461 skb_queue_tail(&ndev->hci_dev->msg_rx_queue, hcp_skb);
462 schedule_work(&ndev->hci_dev->msg_rx_work);
463 }
464 }
465
466 int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe)
467 {
468 struct nci_data data;
469 struct nci_conn_info *conn_info;
470
471 conn_info = ndev->hci_dev->conn_info;
472 if (!conn_info)
473 return -EPROTO;
474
475 data.conn_id = conn_info->conn_id;
476 data.pipe = pipe;
477 data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND,
478 NCI_HCI_ANY_OPEN_PIPE);
479 data.data = NULL;
480 data.data_len = 0;
481
482 return nci_request(ndev, nci_hci_send_data_req,
483 (unsigned long)&data,
484 msecs_to_jiffies(NCI_DATA_TIMEOUT));
485 }
486 EXPORT_SYMBOL(nci_hci_open_pipe);
487
488 int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
489 const u8 *param, size_t param_len)
490 {
491 struct nci_conn_info *conn_info;
492 struct nci_data data;
493 int r;
494 u8 *tmp;
495 u8 pipe = ndev->hci_dev->gate2pipe[gate];
496
497 pr_debug("idx=%d to gate %d\n", idx, gate);
498
499 if (pipe == NCI_HCI_INVALID_PIPE)
500 return -EADDRNOTAVAIL;
501
502 conn_info = ndev->hci_dev->conn_info;
503 if (!conn_info)
504 return -EPROTO;
505
506 tmp = kmalloc(1 + param_len, GFP_KERNEL);
507 if (!tmp)
508 return -ENOMEM;
509
510 *tmp = idx;
511 memcpy(tmp + 1, param, param_len);
512
513 data.conn_id = conn_info->conn_id;
514 data.pipe = pipe;
515 data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND,
516 NCI_HCI_ANY_SET_PARAMETER);
517 data.data = tmp;
518 data.data_len = param_len + 1;
519
520 r = nci_request(ndev, nci_hci_send_data_req,
521 (unsigned long)&data,
522 msecs_to_jiffies(NCI_DATA_TIMEOUT));
523
524 kfree(tmp);
525 return r;
526 }
527 EXPORT_SYMBOL(nci_hci_set_param);
528
529 int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
530 struct sk_buff **skb)
531 {
532 struct nci_conn_info *conn_info;
533 struct nci_data data;
534 int r;
535 u8 pipe = ndev->hci_dev->gate2pipe[gate];
536
537 pr_debug("idx=%d to gate %d\n", idx, gate);
538
539 if (pipe == NCI_HCI_INVALID_PIPE)
540 return -EADDRNOTAVAIL;
541
542 conn_info = ndev->hci_dev->conn_info;
543 if (!conn_info)
544 return -EPROTO;
545
546 data.conn_id = conn_info->conn_id;
547 data.pipe = pipe;
548 data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND,
549 NCI_HCI_ANY_GET_PARAMETER);
550 data.data = &idx;
551 data.data_len = 1;
552
553 r = nci_request(ndev, nci_hci_send_data_req, (unsigned long)&data,
554 msecs_to_jiffies(NCI_DATA_TIMEOUT));
555
556 if (r == NCI_STATUS_OK)
557 *skb = conn_info->rx_skb;
558
559 return r;
560 }
561 EXPORT_SYMBOL(nci_hci_get_param);
562
563 int nci_hci_connect_gate(struct nci_dev *ndev,
564 u8 dest_host, u8 dest_gate, u8 pipe)
565 {
566 int r;
567
568 if (pipe == NCI_HCI_DO_NOT_OPEN_PIPE)
569 return 0;
570
571 if (ndev->hci_dev->gate2pipe[dest_gate] != NCI_HCI_INVALID_PIPE)
572 return -EADDRINUSE;
573
574 if (pipe != NCI_HCI_INVALID_PIPE)
575 goto open_pipe;
576
577 switch (dest_gate) {
578 case NCI_HCI_LINK_MGMT_GATE:
579 pipe = NCI_HCI_LINK_MGMT_PIPE;
580 break;
581 case NCI_HCI_ADMIN_GATE:
582 pipe = NCI_HCI_ADMIN_PIPE;
583 break;
584 }
585
586 open_pipe:
587 r = nci_hci_open_pipe(ndev, pipe);
588 if (r < 0)
589 return r;
590
591 ndev->hci_dev->pipes[pipe].gate = dest_gate;
592 ndev->hci_dev->pipes[pipe].host = dest_host;
593 ndev->hci_dev->gate2pipe[dest_gate] = pipe;
594
595 return 0;
596 }
597 EXPORT_SYMBOL(nci_hci_connect_gate);
598
599 static int nci_hci_dev_connect_gates(struct nci_dev *ndev,
600 u8 gate_count,
601 struct nci_hci_gate *gates)
602 {
603 int r;
604
605 while (gate_count--) {
606 r = nci_hci_connect_gate(ndev, gates->dest_host,
607 gates->gate, gates->pipe);
608 if (r < 0)
609 return r;
610 gates++;
611 }
612
613 return 0;
614 }
615
616 int nci_hci_dev_session_init(struct nci_dev *ndev)
617 {
618 struct nci_conn_info *conn_info;
619 struct sk_buff *skb;
620 int r;
621
622 ndev->hci_dev->count_pipes = 0;
623 ndev->hci_dev->expected_pipes = 0;
624
625 conn_info = ndev->hci_dev->conn_info;
626 if (!conn_info)
627 return -EPROTO;
628
629 conn_info->data_exchange_cb = nci_hci_data_received_cb;
630 conn_info->data_exchange_cb_context = ndev;
631
632 nci_hci_reset_pipes(ndev->hci_dev);
633
634 if (ndev->hci_dev->init_data.gates[0].gate != NCI_HCI_ADMIN_GATE)
635 return -EPROTO;
636
637 r = nci_hci_connect_gate(ndev,
638 ndev->hci_dev->init_data.gates[0].dest_host,
639 ndev->hci_dev->init_data.gates[0].gate,
640 ndev->hci_dev->init_data.gates[0].pipe);
641 if (r < 0)
642 goto exit;
643
644 r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE,
645 NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY, &skb);
646 if (r < 0)
647 goto exit;
648
649 if (skb->len &&
650 skb->len == strlen(ndev->hci_dev->init_data.session_id) &&
651 memcmp(ndev->hci_dev->init_data.session_id,
652 skb->data, skb->len) == 0 &&
653 ndev->ops->hci_load_session) {
654 /* Restore gate<->pipe table from some proprietary location. */
655 r = ndev->ops->hci_load_session(ndev);
656 if (r < 0)
657 goto exit;
658 } else {
659 r = nci_hci_dev_connect_gates(ndev,
660 ndev->hci_dev->init_data.gate_count,
661 ndev->hci_dev->init_data.gates);
662 if (r < 0)
663 goto exit;
664
665 r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
666 NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY,
667 ndev->hci_dev->init_data.session_id,
668 strlen(ndev->hci_dev->init_data.session_id));
669 }
670 if (r == 0)
671 goto exit;
672
673 exit:
674 kfree_skb(skb);
675
676 return r;
677 }
678 EXPORT_SYMBOL(nci_hci_dev_session_init);
679
680 struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev)
681 {
682 struct nci_hci_dev *hdev;
683
684 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
685 if (!hdev)
686 return NULL;
687
688 skb_queue_head_init(&hdev->rx_hcp_frags);
689 INIT_WORK(&hdev->msg_rx_work, nci_hci_msg_rx_work);
690 skb_queue_head_init(&hdev->msg_rx_queue);
691 hdev->ndev = ndev;
692
693 return hdev;
694 }
Linux with added FPC-III support