Commit | Line | Data |
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1da177e4 | 1 | |
5a0e3ad6 | 2 | #include <linux/slab.h> |
1da177e4 LT |
3 | #include <linux/kernel.h> |
4 | #include <linux/module.h> | |
5 | #include <linux/isdn/capilli.h> | |
6 | ||
7 | #define DBG(format, arg...) do { \ | |
156f1ed6 | 8 | printk(KERN_DEBUG "%s: " format "\n" , __func__ , ## arg); \ |
1da177e4 LT |
9 | } while (0) |
10 | ||
11 | struct capilib_msgidqueue { | |
12 | struct capilib_msgidqueue *next; | |
13 | u16 msgid; | |
14 | }; | |
15 | ||
16 | struct capilib_ncci { | |
17 | struct list_head list; | |
18 | u16 applid; | |
19 | u32 ncci; | |
20 | u32 winsize; | |
21 | int nmsg; | |
22 | struct capilib_msgidqueue *msgidqueue; | |
23 | struct capilib_msgidqueue *msgidlast; | |
24 | struct capilib_msgidqueue *msgidfree; | |
25 | struct capilib_msgidqueue msgidpool[CAPI_MAXDATAWINDOW]; | |
26 | }; | |
27 | ||
28 | // --------------------------------------------------------------------------- | |
29 | // NCCI Handling | |
30 | ||
31 | static inline void mq_init(struct capilib_ncci * np) | |
32 | { | |
33 | u_int i; | |
34 | np->msgidqueue = NULL; | |
35 | np->msgidlast = NULL; | |
36 | np->nmsg = 0; | |
37 | memset(np->msgidpool, 0, sizeof(np->msgidpool)); | |
38 | np->msgidfree = &np->msgidpool[0]; | |
39 | for (i = 1; i < np->winsize; i++) { | |
40 | np->msgidpool[i].next = np->msgidfree; | |
41 | np->msgidfree = &np->msgidpool[i]; | |
42 | } | |
43 | } | |
44 | ||
45 | static inline int mq_enqueue(struct capilib_ncci * np, u16 msgid) | |
46 | { | |
47 | struct capilib_msgidqueue *mq; | |
2f9e9b6d | 48 | if ((mq = np->msgidfree) == NULL) |
1da177e4 LT |
49 | return 0; |
50 | np->msgidfree = mq->next; | |
51 | mq->msgid = msgid; | |
52 | mq->next = NULL; | |
53 | if (np->msgidlast) | |
54 | np->msgidlast->next = mq; | |
55 | np->msgidlast = mq; | |
56 | if (!np->msgidqueue) | |
57 | np->msgidqueue = mq; | |
58 | np->nmsg++; | |
59 | return 1; | |
60 | } | |
61 | ||
62 | static inline int mq_dequeue(struct capilib_ncci * np, u16 msgid) | |
63 | { | |
64 | struct capilib_msgidqueue **pp; | |
65 | for (pp = &np->msgidqueue; *pp; pp = &(*pp)->next) { | |
66 | if ((*pp)->msgid == msgid) { | |
67 | struct capilib_msgidqueue *mq = *pp; | |
68 | *pp = mq->next; | |
69 | if (mq == np->msgidlast) | |
70 | np->msgidlast = NULL; | |
71 | mq->next = np->msgidfree; | |
72 | np->msgidfree = mq; | |
73 | np->nmsg--; | |
74 | return 1; | |
75 | } | |
76 | } | |
77 | return 0; | |
78 | } | |
79 | ||
80 | void capilib_new_ncci(struct list_head *head, u16 applid, u32 ncci, u32 winsize) | |
81 | { | |
82 | struct capilib_ncci *np; | |
83 | ||
84 | np = kmalloc(sizeof(*np), GFP_ATOMIC); | |
85 | if (!np) { | |
86 | printk(KERN_WARNING "capilib_new_ncci: no memory.\n"); | |
87 | return; | |
88 | } | |
89 | if (winsize > CAPI_MAXDATAWINDOW) { | |
90 | printk(KERN_ERR "capi_new_ncci: winsize %d too big\n", | |
91 | winsize); | |
92 | winsize = CAPI_MAXDATAWINDOW; | |
93 | } | |
94 | np->applid = applid; | |
95 | np->ncci = ncci; | |
96 | np->winsize = winsize; | |
97 | mq_init(np); | |
98 | list_add_tail(&np->list, head); | |
99 | DBG("kcapi: appl %d ncci 0x%x up", applid, ncci); | |
100 | } | |
101 | ||
102 | EXPORT_SYMBOL(capilib_new_ncci); | |
103 | ||
104 | void capilib_free_ncci(struct list_head *head, u16 applid, u32 ncci) | |
105 | { | |
106 | struct list_head *l; | |
107 | struct capilib_ncci *np; | |
108 | ||
109 | list_for_each(l, head) { | |
110 | np = list_entry(l, struct capilib_ncci, list); | |
111 | if (np->applid != applid) | |
112 | continue; | |
113 | if (np->ncci != ncci) | |
114 | continue; | |
115 | printk(KERN_INFO "kcapi: appl %d ncci 0x%x down\n", applid, ncci); | |
116 | list_del(&np->list); | |
117 | kfree(np); | |
118 | return; | |
119 | } | |
120 | printk(KERN_ERR "capilib_free_ncci: ncci 0x%x not found\n", ncci); | |
121 | } | |
122 | ||
123 | EXPORT_SYMBOL(capilib_free_ncci); | |
124 | ||
125 | void capilib_release_appl(struct list_head *head, u16 applid) | |
126 | { | |
127 | struct list_head *l, *n; | |
128 | struct capilib_ncci *np; | |
129 | ||
130 | list_for_each_safe(l, n, head) { | |
131 | np = list_entry(l, struct capilib_ncci, list); | |
132 | if (np->applid != applid) | |
133 | continue; | |
134 | printk(KERN_INFO "kcapi: appl %d ncci 0x%x forced down\n", applid, np->ncci); | |
135 | list_del(&np->list); | |
136 | kfree(np); | |
137 | } | |
138 | } | |
139 | ||
140 | EXPORT_SYMBOL(capilib_release_appl); | |
141 | ||
142 | void capilib_release(struct list_head *head) | |
143 | { | |
144 | struct list_head *l, *n; | |
145 | struct capilib_ncci *np; | |
146 | ||
147 | list_for_each_safe(l, n, head) { | |
148 | np = list_entry(l, struct capilib_ncci, list); | |
149 | printk(KERN_INFO "kcapi: appl %d ncci 0x%x forced down\n", np->applid, np->ncci); | |
150 | list_del(&np->list); | |
151 | kfree(np); | |
152 | } | |
153 | } | |
154 | ||
155 | EXPORT_SYMBOL(capilib_release); | |
156 | ||
157 | u16 capilib_data_b3_req(struct list_head *head, u16 applid, u32 ncci, u16 msgid) | |
158 | { | |
159 | struct list_head *l; | |
160 | struct capilib_ncci *np; | |
161 | ||
162 | list_for_each(l, head) { | |
163 | np = list_entry(l, struct capilib_ncci, list); | |
164 | if (np->applid != applid) | |
165 | continue; | |
166 | if (np->ncci != ncci) | |
167 | continue; | |
168 | ||
169 | if (mq_enqueue(np, msgid) == 0) | |
170 | return CAPI_SENDQUEUEFULL; | |
171 | ||
172 | return CAPI_NOERROR; | |
173 | } | |
174 | printk(KERN_ERR "capilib_data_b3_req: ncci 0x%x not found\n", ncci); | |
175 | return CAPI_NOERROR; | |
176 | } | |
177 | ||
178 | EXPORT_SYMBOL(capilib_data_b3_req); | |
179 | ||
180 | void capilib_data_b3_conf(struct list_head *head, u16 applid, u32 ncci, u16 msgid) | |
181 | { | |
182 | struct list_head *l; | |
183 | struct capilib_ncci *np; | |
184 | ||
185 | list_for_each(l, head) { | |
186 | np = list_entry(l, struct capilib_ncci, list); | |
187 | if (np->applid != applid) | |
188 | continue; | |
189 | if (np->ncci != ncci) | |
190 | continue; | |
191 | ||
192 | if (mq_dequeue(np, msgid) == 0) { | |
193 | printk(KERN_ERR "kcapi: msgid %hu ncci 0x%x not on queue\n", | |
194 | msgid, ncci); | |
195 | } | |
196 | return; | |
197 | } | |
198 | printk(KERN_ERR "capilib_data_b3_conf: ncci 0x%x not found\n", ncci); | |
199 | } | |
200 | ||
201 | EXPORT_SYMBOL(capilib_data_b3_conf); |