![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
201 lines
4.5 KiB
C
201 lines
4.5 KiB
C
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/isdn/capilli.h>
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#define DBG(format, arg...) do { \
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printk(KERN_DEBUG "%s: " format "\n" , __FUNCTION__ , ## arg); \
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} while (0)
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struct capilib_msgidqueue {
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struct capilib_msgidqueue *next;
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u16 msgid;
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};
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struct capilib_ncci {
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struct list_head list;
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u16 applid;
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u32 ncci;
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u32 winsize;
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int nmsg;
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struct capilib_msgidqueue *msgidqueue;
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struct capilib_msgidqueue *msgidlast;
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struct capilib_msgidqueue *msgidfree;
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struct capilib_msgidqueue msgidpool[CAPI_MAXDATAWINDOW];
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};
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// ---------------------------------------------------------------------------
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// NCCI Handling
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static inline void mq_init(struct capilib_ncci * np)
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{
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u_int i;
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np->msgidqueue = NULL;
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np->msgidlast = NULL;
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np->nmsg = 0;
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memset(np->msgidpool, 0, sizeof(np->msgidpool));
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np->msgidfree = &np->msgidpool[0];
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for (i = 1; i < np->winsize; i++) {
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np->msgidpool[i].next = np->msgidfree;
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np->msgidfree = &np->msgidpool[i];
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}
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}
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static inline int mq_enqueue(struct capilib_ncci * np, u16 msgid)
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{
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struct capilib_msgidqueue *mq;
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if ((mq = np->msgidfree) == 0)
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return 0;
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np->msgidfree = mq->next;
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mq->msgid = msgid;
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mq->next = NULL;
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if (np->msgidlast)
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np->msgidlast->next = mq;
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np->msgidlast = mq;
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if (!np->msgidqueue)
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np->msgidqueue = mq;
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np->nmsg++;
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return 1;
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}
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static inline int mq_dequeue(struct capilib_ncci * np, u16 msgid)
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{
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struct capilib_msgidqueue **pp;
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for (pp = &np->msgidqueue; *pp; pp = &(*pp)->next) {
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if ((*pp)->msgid == msgid) {
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struct capilib_msgidqueue *mq = *pp;
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*pp = mq->next;
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if (mq == np->msgidlast)
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np->msgidlast = NULL;
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mq->next = np->msgidfree;
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np->msgidfree = mq;
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np->nmsg--;
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return 1;
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}
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}
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return 0;
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}
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void capilib_new_ncci(struct list_head *head, u16 applid, u32 ncci, u32 winsize)
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{
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struct capilib_ncci *np;
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np = kmalloc(sizeof(*np), GFP_ATOMIC);
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if (!np) {
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printk(KERN_WARNING "capilib_new_ncci: no memory.\n");
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return;
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}
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if (winsize > CAPI_MAXDATAWINDOW) {
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printk(KERN_ERR "capi_new_ncci: winsize %d too big\n",
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winsize);
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winsize = CAPI_MAXDATAWINDOW;
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}
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np->applid = applid;
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np->ncci = ncci;
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np->winsize = winsize;
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mq_init(np);
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list_add_tail(&np->list, head);
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DBG("kcapi: appl %d ncci 0x%x up", applid, ncci);
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}
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EXPORT_SYMBOL(capilib_new_ncci);
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void capilib_free_ncci(struct list_head *head, u16 applid, u32 ncci)
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{
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struct list_head *l;
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struct capilib_ncci *np;
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list_for_each(l, head) {
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np = list_entry(l, struct capilib_ncci, list);
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if (np->applid != applid)
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continue;
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if (np->ncci != ncci)
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continue;
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printk(KERN_INFO "kcapi: appl %d ncci 0x%x down\n", applid, ncci);
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list_del(&np->list);
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kfree(np);
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return;
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}
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printk(KERN_ERR "capilib_free_ncci: ncci 0x%x not found\n", ncci);
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}
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EXPORT_SYMBOL(capilib_free_ncci);
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void capilib_release_appl(struct list_head *head, u16 applid)
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{
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struct list_head *l, *n;
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struct capilib_ncci *np;
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list_for_each_safe(l, n, head) {
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np = list_entry(l, struct capilib_ncci, list);
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if (np->applid != applid)
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continue;
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printk(KERN_INFO "kcapi: appl %d ncci 0x%x forced down\n", applid, np->ncci);
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list_del(&np->list);
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kfree(np);
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}
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}
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EXPORT_SYMBOL(capilib_release_appl);
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void capilib_release(struct list_head *head)
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{
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struct list_head *l, *n;
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struct capilib_ncci *np;
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list_for_each_safe(l, n, head) {
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np = list_entry(l, struct capilib_ncci, list);
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printk(KERN_INFO "kcapi: appl %d ncci 0x%x forced down\n", np->applid, np->ncci);
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list_del(&np->list);
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kfree(np);
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}
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}
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EXPORT_SYMBOL(capilib_release);
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u16 capilib_data_b3_req(struct list_head *head, u16 applid, u32 ncci, u16 msgid)
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{
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struct list_head *l;
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struct capilib_ncci *np;
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list_for_each(l, head) {
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np = list_entry(l, struct capilib_ncci, list);
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if (np->applid != applid)
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continue;
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if (np->ncci != ncci)
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continue;
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if (mq_enqueue(np, msgid) == 0)
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return CAPI_SENDQUEUEFULL;
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return CAPI_NOERROR;
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}
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printk(KERN_ERR "capilib_data_b3_req: ncci 0x%x not found\n", ncci);
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return CAPI_NOERROR;
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}
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EXPORT_SYMBOL(capilib_data_b3_req);
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void capilib_data_b3_conf(struct list_head *head, u16 applid, u32 ncci, u16 msgid)
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{
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struct list_head *l;
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struct capilib_ncci *np;
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list_for_each(l, head) {
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np = list_entry(l, struct capilib_ncci, list);
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if (np->applid != applid)
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continue;
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if (np->ncci != ncci)
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continue;
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if (mq_dequeue(np, msgid) == 0) {
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printk(KERN_ERR "kcapi: msgid %hu ncci 0x%x not on queue\n",
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msgid, ncci);
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}
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return;
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}
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printk(KERN_ERR "capilib_data_b3_conf: ncci 0x%x not found\n", ncci);
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}
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EXPORT_SYMBOL(capilib_data_b3_conf);
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