3 * Author Karsten Keil <kkeil@novell.com>
5 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
18 #include <linux/module.h>
19 #include <linux/mISDNhw.h>
22 dchannel_bh(struct work_struct *ws)
24 struct dchannel *dch = container_of(ws, struct dchannel, workq);
28 if (test_and_clear_bit(FLG_RECVQUEUE, &dch->Flags)) {
29 while ((skb = skb_dequeue(&dch->rqueue))) {
30 if (likely(dch->dev.D.peer)) {
31 err = dch->dev.D.recv(dch->dev.D.peer, skb);
38 if (test_and_clear_bit(FLG_PHCHANGE, &dch->Flags)) {
45 bchannel_bh(struct work_struct *ws)
47 struct bchannel *bch = container_of(ws, struct bchannel, workq);
51 if (test_and_clear_bit(FLG_RECVQUEUE, &bch->Flags)) {
52 while ((skb = skb_dequeue(&bch->rqueue))) {
54 if (likely(bch->ch.peer)) {
55 err = bch->ch.recv(bch->ch.peer, skb);
65 mISDN_initdchannel(struct dchannel *ch, int maxlen, void *phf)
67 test_and_set_bit(FLG_HDLC, &ch->Flags);
74 skb_queue_head_init(&ch->squeue);
75 skb_queue_head_init(&ch->rqueue);
76 INIT_LIST_HEAD(&ch->dev.bchannels);
77 INIT_WORK(&ch->workq, dchannel_bh);
80 EXPORT_SYMBOL(mISDN_initdchannel);
83 mISDN_initbchannel(struct bchannel *ch, int maxlen)
91 skb_queue_head_init(&ch->rqueue);
94 INIT_WORK(&ch->workq, bchannel_bh);
97 EXPORT_SYMBOL(mISDN_initbchannel);
100 mISDN_freedchannel(struct dchannel *ch)
103 dev_kfree_skb(ch->tx_skb);
107 dev_kfree_skb(ch->rx_skb);
110 skb_queue_purge(&ch->squeue);
111 skb_queue_purge(&ch->rqueue);
112 flush_scheduled_work();
115 EXPORT_SYMBOL(mISDN_freedchannel);
118 mISDN_clear_bchannel(struct bchannel *ch)
121 dev_kfree_skb(ch->tx_skb);
126 dev_kfree_skb(ch->rx_skb);
130 dev_kfree_skb(ch->next_skb);
133 test_and_clear_bit(FLG_TX_BUSY, &ch->Flags);
134 test_and_clear_bit(FLG_TX_NEXT, &ch->Flags);
135 test_and_clear_bit(FLG_ACTIVE, &ch->Flags);
137 EXPORT_SYMBOL(mISDN_clear_bchannel);
140 mISDN_freebchannel(struct bchannel *ch)
142 mISDN_clear_bchannel(ch);
143 skb_queue_purge(&ch->rqueue);
145 flush_scheduled_work();
148 EXPORT_SYMBOL(mISDN_freebchannel);
151 get_sapi_tei(u_char *p)
157 return sapi | (tei << 8);
161 recv_Dchannel(struct dchannel *dch)
163 struct mISDNhead *hh;
165 if (dch->rx_skb->len < 2) { /* at least 2 for sapi / tei */
166 dev_kfree_skb(dch->rx_skb);
170 hh = mISDN_HEAD_P(dch->rx_skb);
171 hh->prim = PH_DATA_IND;
172 hh->id = get_sapi_tei(dch->rx_skb->data);
173 skb_queue_tail(&dch->rqueue, dch->rx_skb);
175 schedule_event(dch, FLG_RECVQUEUE);
177 EXPORT_SYMBOL(recv_Dchannel);
180 recv_Echannel(struct dchannel *ech, struct dchannel *dch)
182 struct mISDNhead *hh;
184 if (ech->rx_skb->len < 2) { /* at least 2 for sapi / tei */
185 dev_kfree_skb(ech->rx_skb);
189 hh = mISDN_HEAD_P(ech->rx_skb);
190 hh->prim = PH_DATA_E_IND;
191 hh->id = get_sapi_tei(ech->rx_skb->data);
192 skb_queue_tail(&dch->rqueue, ech->rx_skb);
194 schedule_event(dch, FLG_RECVQUEUE);
196 EXPORT_SYMBOL(recv_Echannel);
199 recv_Bchannel(struct bchannel *bch, unsigned int id)
201 struct mISDNhead *hh;
203 hh = mISDN_HEAD_P(bch->rx_skb);
204 hh->prim = PH_DATA_IND;
206 if (bch->rcount >= 64) {
207 printk(KERN_WARNING "B-channel %p receive queue overflow, "
209 skb_queue_purge(&bch->rqueue);
214 skb_queue_tail(&bch->rqueue, bch->rx_skb);
216 schedule_event(bch, FLG_RECVQUEUE);
218 EXPORT_SYMBOL(recv_Bchannel);
221 recv_Dchannel_skb(struct dchannel *dch, struct sk_buff *skb)
223 skb_queue_tail(&dch->rqueue, skb);
224 schedule_event(dch, FLG_RECVQUEUE);
226 EXPORT_SYMBOL(recv_Dchannel_skb);
229 recv_Bchannel_skb(struct bchannel *bch, struct sk_buff *skb)
231 if (bch->rcount >= 64) {
232 printk(KERN_WARNING "B-channel %p receive queue overflow, "
234 skb_queue_purge(&bch->rqueue);
238 skb_queue_tail(&bch->rqueue, skb);
239 schedule_event(bch, FLG_RECVQUEUE);
241 EXPORT_SYMBOL(recv_Bchannel_skb);
244 confirm_Dsend(struct dchannel *dch)
248 skb = _alloc_mISDN_skb(PH_DATA_CNF, mISDN_HEAD_ID(dch->tx_skb),
249 0, NULL, GFP_ATOMIC);
251 printk(KERN_ERR "%s: no skb id %x\n", __func__,
252 mISDN_HEAD_ID(dch->tx_skb));
255 skb_queue_tail(&dch->rqueue, skb);
256 schedule_event(dch, FLG_RECVQUEUE);
260 get_next_dframe(struct dchannel *dch)
263 dch->tx_skb = skb_dequeue(&dch->squeue);
269 test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
272 EXPORT_SYMBOL(get_next_dframe);
275 confirm_Bsend(struct bchannel *bch)
279 if (bch->rcount >= 64) {
280 printk(KERN_WARNING "B-channel %p receive queue overflow, "
282 skb_queue_purge(&bch->rqueue);
285 skb = _alloc_mISDN_skb(PH_DATA_CNF, mISDN_HEAD_ID(bch->tx_skb),
286 0, NULL, GFP_ATOMIC);
288 printk(KERN_ERR "%s: no skb id %x\n", __func__,
289 mISDN_HEAD_ID(bch->tx_skb));
293 skb_queue_tail(&bch->rqueue, skb);
294 schedule_event(bch, FLG_RECVQUEUE);
296 EXPORT_SYMBOL(confirm_Bsend);
299 get_next_bframe(struct bchannel *bch)
302 if (test_bit(FLG_TX_NEXT, &bch->Flags)) {
303 bch->tx_skb = bch->next_skb;
305 bch->next_skb = NULL;
306 test_and_clear_bit(FLG_TX_NEXT, &bch->Flags);
307 if (!test_bit(FLG_TRANSPARENT, &bch->Flags))
308 confirm_Bsend(bch); /* not for transparent */
311 test_and_clear_bit(FLG_TX_NEXT, &bch->Flags);
312 printk(KERN_WARNING "B TX_NEXT without skb\n");
316 test_and_clear_bit(FLG_TX_BUSY, &bch->Flags);
319 EXPORT_SYMBOL(get_next_bframe);
322 queue_ch_frame(struct mISDNchannel *ch, u_int pr, int id, struct sk_buff *skb)
324 struct mISDNhead *hh;
327 _queue_data(ch, pr, id, 0, NULL, GFP_ATOMIC);
330 hh = mISDN_HEAD_P(skb);
333 if (!ch->recv(ch->peer, skb))
339 EXPORT_SYMBOL(queue_ch_frame);
342 dchannel_senddata(struct dchannel *ch, struct sk_buff *skb)
346 printk(KERN_WARNING "%s: skb too small\n", __func__);
349 if (skb->len > ch->maxlen) {
350 printk(KERN_WARNING "%s: skb too large(%d/%d)\n",
351 __func__, skb->len, ch->maxlen);
354 /* HW lock must be obtained */
355 if (test_and_set_bit(FLG_TX_BUSY, &ch->Flags)) {
356 skb_queue_tail(&ch->squeue, skb);
365 EXPORT_SYMBOL(dchannel_senddata);
368 bchannel_senddata(struct bchannel *ch, struct sk_buff *skb)
373 printk(KERN_WARNING "%s: skb too small\n", __func__);
376 if (skb->len > ch->maxlen) {
377 printk(KERN_WARNING "%s: skb too large(%d/%d)\n",
378 __func__, skb->len, ch->maxlen);
381 /* HW lock must be obtained */
382 /* check for pending next_skb */
385 "%s: next_skb exist ERROR (skb->len=%d next_skb->len=%d)\n",
386 __func__, skb->len, ch->next_skb->len);
389 if (test_and_set_bit(FLG_TX_BUSY, &ch->Flags)) {
390 test_and_set_bit(FLG_TX_NEXT, &ch->Flags);
400 EXPORT_SYMBOL(bchannel_senddata);