Commit | Line | Data |
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67cccfe1 EL |
1 | /* |
2 | * Link Layer Control manager | |
3 | * | |
4 | * Copyright (C) 2012 Intel Corporation. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
98b32dec | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
67cccfe1 EL |
17 | */ |
18 | ||
67cccfe1 | 19 | #include <net/nfc/llc.h> |
f4f20d06 | 20 | |
67cccfe1 EL |
21 | #include "llc.h" |
22 | ||
0b51fc56 | 23 | static LIST_HEAD(llc_engines); |
67cccfe1 EL |
24 | |
25 | int nfc_llc_init(void) | |
26 | { | |
4a61cd66 EL |
27 | int r; |
28 | ||
4a61cd66 EL |
29 | r = nfc_llc_nop_register(); |
30 | if (r) | |
31 | goto exit; | |
32 | ||
33 | r = nfc_llc_shdlc_register(); | |
34 | if (r) | |
35 | goto exit; | |
36 | ||
37 | return 0; | |
38 | ||
39 | exit: | |
40 | nfc_llc_exit(); | |
41 | return r; | |
67cccfe1 | 42 | } |
67cccfe1 EL |
43 | |
44 | void nfc_llc_exit(void) | |
45 | { | |
46 | struct nfc_llc_engine *llc_engine, *n; | |
47 | ||
48 | list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) { | |
49 | list_del(&llc_engine->entry); | |
50 | kfree(llc_engine->name); | |
51 | kfree(llc_engine); | |
52 | } | |
53 | } | |
67cccfe1 EL |
54 | |
55 | int nfc_llc_register(const char *name, struct nfc_llc_ops *ops) | |
56 | { | |
57 | struct nfc_llc_engine *llc_engine; | |
58 | ||
59 | llc_engine = kzalloc(sizeof(struct nfc_llc_engine), GFP_KERNEL); | |
60 | if (llc_engine == NULL) | |
61 | return -ENOMEM; | |
62 | ||
63 | llc_engine->name = kstrdup(name, GFP_KERNEL); | |
64 | if (llc_engine->name == NULL) { | |
65 | kfree(llc_engine); | |
66 | return -ENOMEM; | |
67 | } | |
68 | llc_engine->ops = ops; | |
69 | ||
70 | INIT_LIST_HEAD(&llc_engine->entry); | |
0f450772 | 71 | list_add_tail(&llc_engine->entry, &llc_engines); |
67cccfe1 EL |
72 | |
73 | return 0; | |
74 | } | |
67cccfe1 EL |
75 | |
76 | static struct nfc_llc_engine *nfc_llc_name_to_engine(const char *name) | |
77 | { | |
78 | struct nfc_llc_engine *llc_engine; | |
79 | ||
80 | list_for_each_entry(llc_engine, &llc_engines, entry) { | |
81 | if (strcmp(llc_engine->name, name) == 0) | |
82 | return llc_engine; | |
83 | } | |
84 | ||
85 | return NULL; | |
86 | } | |
87 | ||
88 | void nfc_llc_unregister(const char *name) | |
89 | { | |
90 | struct nfc_llc_engine *llc_engine; | |
91 | ||
92 | llc_engine = nfc_llc_name_to_engine(name); | |
93 | if (llc_engine == NULL) | |
94 | return; | |
95 | ||
96 | list_del(&llc_engine->entry); | |
97 | kfree(llc_engine->name); | |
98 | kfree(llc_engine); | |
99 | } | |
67cccfe1 EL |
100 | |
101 | struct nfc_llc *nfc_llc_allocate(const char *name, struct nfc_hci_dev *hdev, | |
102 | xmit_to_drv_t xmit_to_drv, | |
103 | rcv_to_hci_t rcv_to_hci, int tx_headroom, | |
104 | int tx_tailroom, llc_failure_t llc_failure) | |
105 | { | |
106 | struct nfc_llc_engine *llc_engine; | |
107 | struct nfc_llc *llc; | |
108 | ||
109 | llc_engine = nfc_llc_name_to_engine(name); | |
110 | if (llc_engine == NULL) | |
111 | return NULL; | |
112 | ||
113 | llc = kzalloc(sizeof(struct nfc_llc), GFP_KERNEL); | |
114 | if (llc == NULL) | |
115 | return NULL; | |
116 | ||
117 | llc->data = llc_engine->ops->init(hdev, xmit_to_drv, rcv_to_hci, | |
118 | tx_headroom, tx_tailroom, | |
119 | &llc->rx_headroom, &llc->rx_tailroom, | |
120 | llc_failure); | |
121 | if (llc->data == NULL) { | |
122 | kfree(llc); | |
123 | return NULL; | |
124 | } | |
125 | llc->ops = llc_engine->ops; | |
126 | ||
127 | return llc; | |
128 | } | |
67cccfe1 EL |
129 | |
130 | void nfc_llc_free(struct nfc_llc *llc) | |
131 | { | |
132 | llc->ops->deinit(llc); | |
133 | kfree(llc); | |
134 | } | |
67cccfe1 EL |
135 | |
136 | inline void nfc_llc_get_rx_head_tail_room(struct nfc_llc *llc, int *rx_headroom, | |
137 | int *rx_tailroom) | |
138 | { | |
139 | *rx_headroom = llc->rx_headroom; | |
140 | *rx_tailroom = llc->rx_tailroom; | |
141 | } | |
67cccfe1 EL |
142 | |
143 | inline int nfc_llc_start(struct nfc_llc *llc) | |
144 | { | |
145 | return llc->ops->start(llc); | |
146 | } | |
67cccfe1 EL |
147 | |
148 | inline int nfc_llc_stop(struct nfc_llc *llc) | |
149 | { | |
150 | return llc->ops->stop(llc); | |
151 | } | |
67cccfe1 EL |
152 | |
153 | inline void nfc_llc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) | |
154 | { | |
155 | llc->ops->rcv_from_drv(llc, skb); | |
156 | } | |
67cccfe1 EL |
157 | |
158 | inline int nfc_llc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) | |
159 | { | |
160 | return llc->ops->xmit_from_hci(llc, skb); | |
161 | } | |
67cccfe1 EL |
162 | |
163 | inline void *nfc_llc_get_data(struct nfc_llc *llc) | |
164 | { | |
165 | return llc->data; | |
166 | } |