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1/*
2 * Copyright (C) 2012 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
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 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the
16 * Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20#define pr_fmt(fmt) "hci: %s: " fmt, __func__
21
22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/sched.h>
25#include <linux/module.h>
26
27#include <net/nfc/hci.h>
28
29#include "hci.h"
30
31static int nfc_hci_result_to_errno(u8 result)
32{
33 switch (result) {
34 case NFC_HCI_ANY_OK:
35 return 0;
36 case NFC_HCI_ANY_E_TIMEOUT:
37 return -ETIMEDOUT;
38 default:
39 return -1;
40 }
41}
42
43static void nfc_hci_execute_cb(struct nfc_hci_dev *hdev, u8 result,
44 struct sk_buff *skb, void *cb_data)
45{
46 struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)cb_data;
47
48 pr_debug("HCI Cmd completed with HCI result=%d\n", result);
49
50 hcp_ew->exec_result = nfc_hci_result_to_errno(result);
51 if (hcp_ew->exec_result == 0)
52 hcp_ew->result_skb = skb;
53 else
54 kfree_skb(skb);
55 hcp_ew->exec_complete = true;
56
57 wake_up(hcp_ew->wq);
58}
59
60static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
61 const u8 *param, size_t param_len,
62 struct sk_buff **skb)
63{
64 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(ew_wq);
65 struct hcp_exec_waiter hcp_ew;
66 hcp_ew.wq = &ew_wq;
67 hcp_ew.exec_complete = false;
68 hcp_ew.result_skb = NULL;
69
70 pr_debug("through pipe=%d, cmd=%d, plen=%zd\n", pipe, cmd, param_len);
71
72 /* TODO: Define hci cmd execution delay. Should it be the same
73 * for all commands?
74 */
75 hcp_ew.exec_result = nfc_hci_hcp_message_tx(hdev, pipe,
76 NFC_HCI_HCP_COMMAND, cmd,
77 param, param_len,
78 nfc_hci_execute_cb, &hcp_ew,
79 3000);
80 if (hcp_ew.exec_result < 0)
81 return hcp_ew.exec_result;
82
83 wait_event(ew_wq, hcp_ew.exec_complete == true);
84
85 if (hcp_ew.exec_result == 0) {
86 if (skb)
87 *skb = hcp_ew.result_skb;
88 else
89 kfree_skb(hcp_ew.result_skb);
90 }
91
92 return hcp_ew.exec_result;
93}
94
95int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
96 const u8 *param, size_t param_len)
97{
98 u8 pipe;
99
100 pr_debug("%d to gate %d\n", event, gate);
101
102 pipe = hdev->gate2pipe[gate];
103 if (pipe == NFC_HCI_INVALID_PIPE)
104 return -EADDRNOTAVAIL;
105
106 return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_EVENT, event,
107 param, param_len, NULL, NULL, 0);
108}
109EXPORT_SYMBOL(nfc_hci_send_event);
110
111int nfc_hci_send_response(struct nfc_hci_dev *hdev, u8 gate, u8 response,
112 const u8 *param, size_t param_len)
113{
114 u8 pipe;
115
116 pr_debug("\n");
117
118 pipe = hdev->gate2pipe[gate];
119 if (pipe == NFC_HCI_INVALID_PIPE)
120 return -EADDRNOTAVAIL;
121
122 return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
123 response, param, param_len, NULL, NULL,
124 0);
125}
126EXPORT_SYMBOL(nfc_hci_send_response);
127
128/*
129 * Execute an hci command sent to gate.
130 * skb will contain response data if success. skb can be NULL if you are not
131 * interested by the response.
132 */
133int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
134 const u8 *param, size_t param_len, struct sk_buff **skb)
135{
136 u8 pipe;
137
138 pr_debug("\n");
139
140 pipe = hdev->gate2pipe[gate];
141 if (pipe == NFC_HCI_INVALID_PIPE)
142 return -EADDRNOTAVAIL;
143
144 return nfc_hci_execute_cmd(hdev, pipe, cmd, param, param_len, skb);
145}
146EXPORT_SYMBOL(nfc_hci_send_cmd);
147
148int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
149 const u8 *param, size_t param_len)
150{
151 int r;
152 u8 *tmp;
153
154 /* TODO ELa: reg idx must be inserted before param, but we don't want
155 * to ask the caller to do it to keep a simpler API.
156 * For now, just create a new temporary param buffer. This is far from
157 * optimal though, and the plan is to modify APIs to pass idx down to
158 * nfc_hci_hcp_message_tx where the frame is actually built, thereby
159 * eliminating the need for the temp allocation-copy here.
160 */
161
162 pr_debug("idx=%d to gate %d\n", idx, gate);
163
164 tmp = kmalloc(1 + param_len, GFP_KERNEL);
165 if (tmp == NULL)
166 return -ENOMEM;
167
168 *tmp = idx;
169 memcpy(tmp + 1, param, param_len);
170
171 r = nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_SET_PARAMETER,
172 tmp, param_len + 1, NULL);
173
174 kfree(tmp);
175
176 return r;
177}
178EXPORT_SYMBOL(nfc_hci_set_param);
179
180int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
181 struct sk_buff **skb)
182{
183 pr_debug("gate=%d regidx=%d\n", gate, idx);
184
185 return nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_GET_PARAMETER,
186 &idx, 1, skb);
187}
188EXPORT_SYMBOL(nfc_hci_get_param);
189
190static int nfc_hci_open_pipe(struct nfc_hci_dev *hdev, u8 pipe)
191{
192 struct sk_buff *skb;
193 int r;
194
195 pr_debug("pipe=%d\n", pipe);
196
197 r = nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_OPEN_PIPE,
198 NULL, 0, &skb);
199 if (r == 0) {
200 /* dest host other than host controller will send
201 * number of pipes already open on this gate before
202 * execution. The number can be found in skb->data[0]
203 */
204 kfree_skb(skb);
205 }
206
207 return r;
208}
209
210static int nfc_hci_close_pipe(struct nfc_hci_dev *hdev, u8 pipe)
211{
212 pr_debug("\n");
213
214 return nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_CLOSE_PIPE,
215 NULL, 0, NULL);
216}
217
218static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
219 u8 dest_gate, int *result)
220{
221 struct sk_buff *skb;
222 struct hci_create_pipe_params params;
223 struct hci_create_pipe_resp *resp;
224 u8 pipe;
225
226 pr_debug("gate=%d\n", dest_gate);
227
228 params.src_gate = NFC_HCI_ADMIN_GATE;
229 params.dest_host = dest_host;
230 params.dest_gate = dest_gate;
231
232 *result = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
233 NFC_HCI_ADM_CREATE_PIPE,
234 (u8 *) ¶ms, sizeof(params), &skb);
235 if (*result == 0) {
236 resp = (struct hci_create_pipe_resp *)skb->data;
237 pipe = resp->pipe;
238 kfree_skb(skb);
239
240 pr_debug("pipe created=%d\n", pipe);
241
242 return pipe;
243 } else
244 return NFC_HCI_INVALID_PIPE;
245}
246
247static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
248{
249 pr_debug("\n");
250
251 return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
252 NFC_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL);
253}
254
255static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
256{
257 int r;
258
259 u8 param[2];
260
261 /* TODO: Find out what the identity reference data is
262 * and fill param with it. HCI spec 6.1.3.5 */
263
264 pr_debug("\n");
265
266 r = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
267 NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
268
269 return 0;
270}
271
272int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
273{
274 int r;
275 u8 pipe = hdev->gate2pipe[gate];
276
277 pr_debug("\n");
278
279 if (pipe == NFC_HCI_INVALID_PIPE)
280 return -EADDRNOTAVAIL;
281
282 r = nfc_hci_close_pipe(hdev, pipe);
283 if (r < 0)
284 return r;
285
286 if (pipe != NFC_HCI_LINK_MGMT_PIPE && pipe != NFC_HCI_ADMIN_PIPE) {
287 r = nfc_hci_delete_pipe(hdev, pipe);
288 if (r < 0)
289 return r;
290 }
291
292 hdev->gate2pipe[gate] = NFC_HCI_INVALID_PIPE;
293
294 return 0;
295}
296EXPORT_SYMBOL(nfc_hci_disconnect_gate);
297
298int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev)
299{
300 int r;
301
302 pr_debug("\n");
303
304 r = nfc_hci_clear_all_pipes(hdev);
305 if (r < 0)
306 return r;
307
308 memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
309
310 return 0;
311}
312EXPORT_SYMBOL(nfc_hci_disconnect_all_gates);
313
314int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate)
315{
316 u8 pipe = NFC_HCI_INVALID_PIPE;
317 bool pipe_created = false;
318 int r;
319
320 pr_debug("\n");
321
322 if (hdev->gate2pipe[dest_gate] != NFC_HCI_INVALID_PIPE)
323 return -EADDRINUSE;
324
325 switch (dest_gate) {
326 case NFC_HCI_LINK_MGMT_GATE:
327 pipe = NFC_HCI_LINK_MGMT_PIPE;
328 break;
329 case NFC_HCI_ADMIN_GATE:
330 pipe = NFC_HCI_ADMIN_PIPE;
331 break;
332 default:
333 pipe = nfc_hci_create_pipe(hdev, dest_host, dest_gate, &r);
334 if (pipe == NFC_HCI_INVALID_PIPE)
335 return r;
336 pipe_created = true;
337 break;
338 }
339
340 r = nfc_hci_open_pipe(hdev, pipe);
341 if (r < 0) {
342 if (pipe_created)
343 if (nfc_hci_delete_pipe(hdev, pipe) < 0) {
344 /* TODO: Cannot clean by deleting pipe...
345 * -> inconsistent state */
346 }
347 return r;
348 }
349
350 hdev->gate2pipe[dest_gate] = pipe;
351
352 return 0;
353}
354EXPORT_SYMBOL(nfc_hci_connect_gate);
1/*
2 * Copyright (C) 2012 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
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 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 */
17
18#define pr_fmt(fmt) "hci: %s: " fmt, __func__
19
20#include <linux/init.h>
21#include <linux/kernel.h>
22#include <linux/sched.h>
23#include <linux/module.h>
24
25#include <net/nfc/hci.h>
26
27#include "hci.h"
28
29#define MAX_FWI 4949
30
31static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
32 const u8 *param, size_t param_len,
33 data_exchange_cb_t cb, void *cb_context)
34{
35 pr_debug("exec cmd async through pipe=%d, cmd=%d, plen=%zd\n", pipe,
36 cmd, param_len);
37
38 /* TODO: Define hci cmd execution delay. Should it be the same
39 * for all commands?
40 */
41 return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_COMMAND, cmd,
42 param, param_len, cb, cb_context, MAX_FWI);
43}
44
45/*
46 * HCI command execution completion callback.
47 * err will be a standard linux error (may be converted from HCI response)
48 * skb contains the response data and must be disposed, or may be NULL if
49 * an error occured
50 */
51static void nfc_hci_execute_cb(void *context, struct sk_buff *skb, int err)
52{
53 struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)context;
54
55 pr_debug("HCI Cmd completed with result=%d\n", err);
56
57 hcp_ew->exec_result = err;
58 if (hcp_ew->exec_result == 0)
59 hcp_ew->result_skb = skb;
60 else
61 kfree_skb(skb);
62 hcp_ew->exec_complete = true;
63
64 wake_up(hcp_ew->wq);
65}
66
67static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
68 const u8 *param, size_t param_len,
69 struct sk_buff **skb)
70{
71 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(ew_wq);
72 struct hcp_exec_waiter hcp_ew;
73 hcp_ew.wq = &ew_wq;
74 hcp_ew.exec_complete = false;
75 hcp_ew.result_skb = NULL;
76
77 pr_debug("exec cmd sync through pipe=%d, cmd=%d, plen=%zd\n", pipe,
78 cmd, param_len);
79
80 /* TODO: Define hci cmd execution delay. Should it be the same
81 * for all commands?
82 */
83 hcp_ew.exec_result = nfc_hci_hcp_message_tx(hdev, pipe,
84 NFC_HCI_HCP_COMMAND, cmd,
85 param, param_len,
86 nfc_hci_execute_cb, &hcp_ew,
87 MAX_FWI);
88 if (hcp_ew.exec_result < 0)
89 return hcp_ew.exec_result;
90
91 wait_event(ew_wq, hcp_ew.exec_complete == true);
92
93 if (hcp_ew.exec_result == 0) {
94 if (skb)
95 *skb = hcp_ew.result_skb;
96 else
97 kfree_skb(hcp_ew.result_skb);
98 }
99
100 return hcp_ew.exec_result;
101}
102
103int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
104 const u8 *param, size_t param_len)
105{
106 u8 pipe;
107
108 pr_debug("%d to gate %d\n", event, gate);
109
110 pipe = hdev->gate2pipe[gate];
111 if (pipe == NFC_HCI_INVALID_PIPE)
112 return -EADDRNOTAVAIL;
113
114 return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_EVENT, event,
115 param, param_len, NULL, NULL, 0);
116}
117EXPORT_SYMBOL(nfc_hci_send_event);
118
119/*
120 * Execute an hci command sent to gate.
121 * skb will contain response data if success. skb can be NULL if you are not
122 * interested by the response.
123 */
124int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
125 const u8 *param, size_t param_len, struct sk_buff **skb)
126{
127 u8 pipe;
128
129 pr_debug("\n");
130
131 pipe = hdev->gate2pipe[gate];
132 if (pipe == NFC_HCI_INVALID_PIPE)
133 return -EADDRNOTAVAIL;
134
135 return nfc_hci_execute_cmd(hdev, pipe, cmd, param, param_len, skb);
136}
137EXPORT_SYMBOL(nfc_hci_send_cmd);
138
139int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
140 const u8 *param, size_t param_len,
141 data_exchange_cb_t cb, void *cb_context)
142{
143 u8 pipe;
144
145 pr_debug("\n");
146
147 pipe = hdev->gate2pipe[gate];
148 if (pipe == NFC_HCI_INVALID_PIPE)
149 return -EADDRNOTAVAIL;
150
151 return nfc_hci_execute_cmd_async(hdev, pipe, cmd, param, param_len,
152 cb, cb_context);
153}
154EXPORT_SYMBOL(nfc_hci_send_cmd_async);
155
156int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
157 const u8 *param, size_t param_len)
158{
159 int r;
160 u8 *tmp;
161
162 /* TODO ELa: reg idx must be inserted before param, but we don't want
163 * to ask the caller to do it to keep a simpler API.
164 * For now, just create a new temporary param buffer. This is far from
165 * optimal though, and the plan is to modify APIs to pass idx down to
166 * nfc_hci_hcp_message_tx where the frame is actually built, thereby
167 * eliminating the need for the temp allocation-copy here.
168 */
169
170 pr_debug("idx=%d to gate %d\n", idx, gate);
171
172 tmp = kmalloc(1 + param_len, GFP_KERNEL);
173 if (tmp == NULL)
174 return -ENOMEM;
175
176 *tmp = idx;
177 memcpy(tmp + 1, param, param_len);
178
179 r = nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_SET_PARAMETER,
180 tmp, param_len + 1, NULL);
181
182 kfree(tmp);
183
184 return r;
185}
186EXPORT_SYMBOL(nfc_hci_set_param);
187
188int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
189 struct sk_buff **skb)
190{
191 pr_debug("gate=%d regidx=%d\n", gate, idx);
192
193 return nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_GET_PARAMETER,
194 &idx, 1, skb);
195}
196EXPORT_SYMBOL(nfc_hci_get_param);
197
198static int nfc_hci_open_pipe(struct nfc_hci_dev *hdev, u8 pipe)
199{
200 struct sk_buff *skb;
201 int r;
202
203 pr_debug("pipe=%d\n", pipe);
204
205 r = nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_OPEN_PIPE,
206 NULL, 0, &skb);
207 if (r == 0) {
208 /* dest host other than host controller will send
209 * number of pipes already open on this gate before
210 * execution. The number can be found in skb->data[0]
211 */
212 kfree_skb(skb);
213 }
214
215 return r;
216}
217
218static int nfc_hci_close_pipe(struct nfc_hci_dev *hdev, u8 pipe)
219{
220 pr_debug("\n");
221
222 return nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_CLOSE_PIPE,
223 NULL, 0, NULL);
224}
225
226static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
227 u8 dest_gate, int *result)
228{
229 struct sk_buff *skb;
230 struct hci_create_pipe_params params;
231 struct hci_create_pipe_resp *resp;
232 u8 pipe;
233
234 pr_debug("gate=%d\n", dest_gate);
235
236 params.src_gate = NFC_HCI_ADMIN_GATE;
237 params.dest_host = dest_host;
238 params.dest_gate = dest_gate;
239
240 *result = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
241 NFC_HCI_ADM_CREATE_PIPE,
242 (u8 *) ¶ms, sizeof(params), &skb);
243 if (*result < 0)
244 return NFC_HCI_INVALID_PIPE;
245
246 resp = (struct hci_create_pipe_resp *)skb->data;
247 pipe = resp->pipe;
248 kfree_skb(skb);
249
250 pr_debug("pipe created=%d\n", pipe);
251
252 return pipe;
253}
254
255static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
256{
257 pr_debug("\n");
258
259 return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
260 NFC_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL);
261}
262
263static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
264{
265 u8 param[2];
266 size_t param_len = 2;
267
268 /* TODO: Find out what the identity reference data is
269 * and fill param with it. HCI spec 6.1.3.5 */
270
271 pr_debug("\n");
272
273 if (test_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &hdev->quirks))
274 param_len = 0;
275
276 return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
277 NFC_HCI_ADM_CLEAR_ALL_PIPE, param, param_len,
278 NULL);
279}
280
281int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
282{
283 int r;
284 u8 pipe = hdev->gate2pipe[gate];
285
286 pr_debug("\n");
287
288 if (pipe == NFC_HCI_INVALID_PIPE)
289 return -EADDRNOTAVAIL;
290
291 r = nfc_hci_close_pipe(hdev, pipe);
292 if (r < 0)
293 return r;
294
295 if (pipe != NFC_HCI_LINK_MGMT_PIPE && pipe != NFC_HCI_ADMIN_PIPE) {
296 r = nfc_hci_delete_pipe(hdev, pipe);
297 if (r < 0)
298 return r;
299 }
300
301 hdev->gate2pipe[gate] = NFC_HCI_INVALID_PIPE;
302
303 return 0;
304}
305EXPORT_SYMBOL(nfc_hci_disconnect_gate);
306
307int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev)
308{
309 int r;
310
311 pr_debug("\n");
312
313 r = nfc_hci_clear_all_pipes(hdev);
314 if (r < 0)
315 return r;
316
317 nfc_hci_reset_pipes(hdev);
318
319 return 0;
320}
321EXPORT_SYMBOL(nfc_hci_disconnect_all_gates);
322
323int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
324 u8 pipe)
325{
326 bool pipe_created = false;
327 int r;
328
329 pr_debug("\n");
330
331 if (pipe == NFC_HCI_DO_NOT_CREATE_PIPE)
332 return 0;
333
334 if (hdev->gate2pipe[dest_gate] != NFC_HCI_INVALID_PIPE)
335 return -EADDRINUSE;
336
337 if (pipe != NFC_HCI_INVALID_PIPE)
338 goto open_pipe;
339
340 switch (dest_gate) {
341 case NFC_HCI_LINK_MGMT_GATE:
342 pipe = NFC_HCI_LINK_MGMT_PIPE;
343 break;
344 case NFC_HCI_ADMIN_GATE:
345 pipe = NFC_HCI_ADMIN_PIPE;
346 break;
347 default:
348 pipe = nfc_hci_create_pipe(hdev, dest_host, dest_gate, &r);
349 if (pipe == NFC_HCI_INVALID_PIPE)
350 return r;
351 pipe_created = true;
352 break;
353 }
354
355open_pipe:
356 r = nfc_hci_open_pipe(hdev, pipe);
357 if (r < 0) {
358 if (pipe_created)
359 if (nfc_hci_delete_pipe(hdev, pipe) < 0) {
360 /* TODO: Cannot clean by deleting pipe...
361 * -> inconsistent state */
362 }
363 return r;
364 }
365
366 hdev->pipes[pipe].gate = dest_gate;
367 hdev->pipes[pipe].dest_host = dest_host;
368 hdev->gate2pipe[dest_gate] = pipe;
369
370 return 0;
371}
372EXPORT_SYMBOL(nfc_hci_connect_gate);