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