1 /* -----------------------------------------------------------------------------
2 * Copyright (c) 2011 Ozmo Inc
3 * Released under the GNU General Public License Version 2 (GPLv2).
4 * -----------------------------------------------------------------------------
6 #include <linux/init.h>
7 #include <linux/module.h>
8 #include <linux/timer.h>
9 #include <linux/sched.h>
10 #include <linux/netdevice.h>
11 #include <linux/errno.h>
13 #include "ozprotocol.h"
21 #include <asm/unaligned.h>
22 #include <linux/uaccess.h>
23 #include <net/psnap.h>
24 /*------------------------------------------------------------------------------
26 #define OZ_MAX_TX_POOL_SIZE 6
27 /*------------------------------------------------------------------------------
29 static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd);
30 static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f);
31 static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f);
32 static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f);
33 static int oz_send_isoc_frame(struct oz_pd *pd);
34 static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f);
35 static void oz_isoc_stream_free(struct oz_isoc_stream *st);
36 static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data);
37 static void oz_isoc_destructor(struct sk_buff *skb);
38 static int oz_def_app_init(void);
39 static void oz_def_app_term(void);
40 static int oz_def_app_start(struct oz_pd *pd, int resume);
41 static void oz_def_app_stop(struct oz_pd *pd, int pause);
42 static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt);
43 /*------------------------------------------------------------------------------
44 * Counts the uncompleted isoc frames submitted to netcard.
46 static atomic_t g_submitted_isoc = ATOMIC_INIT(0);
47 /* Application handler functions.
49 static const struct oz_app_if g_app_if[OZ_APPID_MAX] = {
86 /*------------------------------------------------------------------------------
89 static int oz_def_app_init(void)
93 /*------------------------------------------------------------------------------
96 static void oz_def_app_term(void)
99 /*------------------------------------------------------------------------------
102 static int oz_def_app_start(struct oz_pd *pd, int resume)
106 /*------------------------------------------------------------------------------
109 static void oz_def_app_stop(struct oz_pd *pd, int pause)
112 /*------------------------------------------------------------------------------
115 static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt)
118 /*------------------------------------------------------------------------------
119 * Context: softirq or process
121 void oz_pd_set_state(struct oz_pd *pd, unsigned state)
124 oz_event_log(OZ_EVT_PD_STATE, 0, 0, NULL, state);
128 oz_trace("PD State: OZ_PD_S_IDLE\n");
130 case OZ_PD_S_CONNECTED:
131 oz_trace("PD State: OZ_PD_S_CONNECTED\n");
133 case OZ_PD_S_STOPPED:
134 oz_trace("PD State: OZ_PD_S_STOPPED\n");
137 oz_trace("PD State: OZ_PD_S_SLEEP\n");
140 #endif /* WANT_TRACE */
142 /*------------------------------------------------------------------------------
143 * Context: softirq or process
145 void oz_pd_get(struct oz_pd *pd)
147 atomic_inc(&pd->ref_count);
149 /*------------------------------------------------------------------------------
150 * Context: softirq or process
152 void oz_pd_put(struct oz_pd *pd)
154 if (atomic_dec_and_test(&pd->ref_count))
157 /*------------------------------------------------------------------------------
158 * Context: softirq-serialized
160 struct oz_pd *oz_pd_alloc(const u8 *mac_addr)
162 struct oz_pd *pd = kzalloc(sizeof(struct oz_pd), GFP_ATOMIC);
165 atomic_set(&pd->ref_count, 2);
166 for (i = 0; i < OZ_APPID_MAX; i++)
167 spin_lock_init(&pd->app_lock[i]);
168 pd->last_rx_pkt_num = 0xffffffff;
169 oz_pd_set_state(pd, OZ_PD_S_IDLE);
170 pd->max_tx_size = OZ_MAX_TX_SIZE;
171 memcpy(pd->mac_addr, mac_addr, ETH_ALEN);
172 if (0 != oz_elt_buf_init(&pd->elt_buff)) {
176 spin_lock_init(&pd->tx_frame_lock);
177 INIT_LIST_HEAD(&pd->tx_queue);
178 INIT_LIST_HEAD(&pd->farewell_list);
179 pd->last_sent_frame = &pd->tx_queue;
180 spin_lock_init(&pd->stream_lock);
181 INIT_LIST_HEAD(&pd->stream_list);
185 /*------------------------------------------------------------------------------
186 * Context: softirq or process
188 void oz_pd_destroy(struct oz_pd *pd)
191 struct oz_tx_frame *f;
192 struct oz_isoc_stream *st;
193 struct oz_farewell *fwell;
194 oz_trace("Destroying PD\n");
195 /* Delete any streams.
197 e = pd->stream_list.next;
198 while (e != &pd->stream_list) {
199 st = container_of(e, struct oz_isoc_stream, link);
201 oz_isoc_stream_free(st);
203 /* Free any queued tx frames.
205 e = pd->tx_queue.next;
206 while (e != &pd->tx_queue) {
207 f = container_of(e, struct oz_tx_frame, link);
211 oz_retire_frame(pd, f);
213 oz_elt_buf_term(&pd->elt_buff);
214 /* Free any farewells.
216 e = pd->farewell_list.next;
217 while (e != &pd->farewell_list) {
218 fwell = container_of(e, struct oz_farewell, link);
222 /* Deallocate all frames in tx pool.
224 while (pd->tx_pool) {
226 pd->tx_pool = e->next;
227 kfree(container_of(e, struct oz_tx_frame, link));
230 dev_put(pd->net_dev);
233 /*------------------------------------------------------------------------------
234 * Context: softirq-serialized
236 int oz_services_start(struct oz_pd *pd, u16 apps, int resume)
238 const struct oz_app_if *ai;
240 oz_trace("oz_services_start(0x%x) resume(%d)\n", apps, resume);
241 for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) {
242 if (apps & (1<<ai->app_id)) {
243 if (ai->start(pd, resume)) {
245 oz_trace("Unabled to start service %d\n",
249 oz_polling_lock_bh();
250 pd->total_apps |= (1<<ai->app_id);
252 pd->paused_apps &= ~(1<<ai->app_id);
253 oz_polling_unlock_bh();
258 /*------------------------------------------------------------------------------
259 * Context: softirq or process
261 void oz_services_stop(struct oz_pd *pd, u16 apps, int pause)
263 const struct oz_app_if *ai;
264 oz_trace("oz_stop_services(0x%x) pause(%d)\n", apps, pause);
265 for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) {
266 if (apps & (1<<ai->app_id)) {
267 oz_polling_lock_bh();
269 pd->paused_apps |= (1<<ai->app_id);
271 pd->total_apps &= ~(1<<ai->app_id);
272 pd->paused_apps &= ~(1<<ai->app_id);
274 oz_polling_unlock_bh();
279 /*------------------------------------------------------------------------------
282 void oz_pd_heartbeat(struct oz_pd *pd, u16 apps)
284 const struct oz_app_if *ai;
286 for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) {
287 if (ai->heartbeat && (apps & (1<<ai->app_id))) {
288 if (ai->heartbeat(pd))
293 oz_pd_request_heartbeat(pd);
294 if (pd->mode & OZ_F_ISOC_ANYTIME) {
296 while (count-- && (oz_send_isoc_frame(pd) >= 0))
300 /*------------------------------------------------------------------------------
301 * Context: softirq or process
303 void oz_pd_stop(struct oz_pd *pd)
306 oz_trace("oz_pd_stop() State = 0x%x\n", pd->state);
307 oz_pd_indicate_farewells(pd);
308 oz_polling_lock_bh();
309 stop_apps = pd->total_apps;
312 oz_polling_unlock_bh();
313 oz_services_stop(pd, stop_apps, 0);
314 oz_polling_lock_bh();
315 oz_pd_set_state(pd, OZ_PD_S_STOPPED);
316 /* Remove from PD list.*/
318 oz_polling_unlock_bh();
319 oz_trace("pd ref count = %d\n", atomic_read(&pd->ref_count));
320 oz_timer_delete(pd, 0);
323 /*------------------------------------------------------------------------------
326 int oz_pd_sleep(struct oz_pd *pd)
330 oz_polling_lock_bh();
331 if (pd->state & (OZ_PD_S_SLEEP | OZ_PD_S_STOPPED)) {
332 oz_polling_unlock_bh();
335 if (pd->keep_alive_j && pd->session_id) {
336 oz_pd_set_state(pd, OZ_PD_S_SLEEP);
337 pd->pulse_time_j = jiffies + pd->keep_alive_j;
338 oz_trace("Sleep Now %lu until %lu\n",
339 jiffies, pd->pulse_time_j);
343 stop_apps = pd->total_apps;
344 oz_polling_unlock_bh();
348 oz_services_stop(pd, stop_apps, 1);
349 oz_timer_add(pd, OZ_TIMER_STOP, jiffies + pd->keep_alive_j, 1);
353 /*------------------------------------------------------------------------------
356 static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd)
358 struct oz_tx_frame *f = NULL;
359 spin_lock_bh(&pd->tx_frame_lock);
361 f = container_of(pd->tx_pool, struct oz_tx_frame, link);
362 pd->tx_pool = pd->tx_pool->next;
365 spin_unlock_bh(&pd->tx_frame_lock);
367 f = kmalloc(sizeof(struct oz_tx_frame), GFP_ATOMIC);
369 f->total_size = sizeof(struct oz_hdr);
370 INIT_LIST_HEAD(&f->link);
371 INIT_LIST_HEAD(&f->elt_list);
375 /*------------------------------------------------------------------------------
376 * Context: softirq or process
378 static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f)
380 pd->nb_queued_isoc_frames--;
381 list_del_init(&f->link);
382 if (pd->tx_pool_count < OZ_MAX_TX_POOL_SIZE) {
383 f->link.next = pd->tx_pool;
384 pd->tx_pool = &f->link;
389 oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing ISOC Frame isoc_nb= %d\n",
390 pd->nb_queued_isoc_frames);
392 /*------------------------------------------------------------------------------
393 * Context: softirq or process
395 static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f)
397 spin_lock_bh(&pd->tx_frame_lock);
398 if (pd->tx_pool_count < OZ_MAX_TX_POOL_SIZE) {
399 f->link.next = pd->tx_pool;
400 pd->tx_pool = &f->link;
404 spin_unlock_bh(&pd->tx_frame_lock);
407 /*------------------------------------------------------------------------------
408 * Context: softirq-serialized
410 static void oz_set_more_bit(struct sk_buff *skb)
412 struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb);
413 oz_hdr->control |= OZ_F_MORE_DATA;
415 /*------------------------------------------------------------------------------
416 * Context: softirq-serialized
418 static void oz_set_last_pkt_nb(struct oz_pd *pd, struct sk_buff *skb)
420 struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb);
421 oz_hdr->last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK;
423 /*------------------------------------------------------------------------------
426 int oz_prepare_frame(struct oz_pd *pd, int empty)
428 struct oz_tx_frame *f;
429 if ((pd->mode & OZ_MODE_MASK) != OZ_MODE_TRIGGERED)
431 if (pd->nb_queued_frames >= OZ_MAX_QUEUED_FRAMES)
433 if (!empty && !oz_are_elts_available(&pd->elt_buff))
435 f = oz_tx_frame_alloc(pd);
440 (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ACK_REQUESTED;
441 ++pd->last_tx_pkt_num;
442 put_unaligned(cpu_to_le32(pd->last_tx_pkt_num), &f->hdr.pkt_num);
444 oz_select_elts_for_tx(&pd->elt_buff, 0, &f->total_size,
445 pd->max_tx_size, &f->elt_list);
447 spin_lock(&pd->tx_frame_lock);
448 list_add_tail(&f->link, &pd->tx_queue);
449 pd->nb_queued_frames++;
450 spin_unlock(&pd->tx_frame_lock);
453 /*------------------------------------------------------------------------------
454 * Context: softirq-serialized
456 static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f)
459 struct net_device *dev = pd->net_dev;
460 struct oz_hdr *oz_hdr;
463 /* Allocate skb with enough space for the lower layers as well
464 * as the space we need.
466 skb = alloc_skb(f->total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC);
469 /* Reserve the head room for lower layers.
471 skb_reserve(skb, LL_RESERVED_SPACE(dev));
472 skb_reset_network_header(skb);
474 skb->protocol = htons(OZ_ETHERTYPE);
475 if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr,
476 dev->dev_addr, skb->len) < 0)
478 /* Push the tail to the end of the area we are going to copy to.
480 oz_hdr = (struct oz_hdr *)skb_put(skb, f->total_size);
481 f->hdr.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK;
482 memcpy(oz_hdr, &f->hdr, sizeof(struct oz_hdr));
483 /* Copy the elements into the frame body.
485 elt = (struct oz_elt *)(oz_hdr+1);
486 for (e = f->elt_list.next; e != &f->elt_list; e = e->next) {
487 struct oz_elt_info *ei;
488 ei = container_of(e, struct oz_elt_info, link);
489 memcpy(elt, ei->data, ei->length);
490 elt = oz_next_elt(elt);
497 /*------------------------------------------------------------------------------
498 * Context: softirq or process
500 static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f)
503 struct oz_elt_info *ei;
504 e = f->elt_list.next;
505 while (e != &f->elt_list) {
506 ei = container_of(e, struct oz_elt_info, link);
508 list_del_init(&ei->link);
510 ei->callback(pd, ei->context);
511 spin_lock_bh(&pd->elt_buff.lock);
512 oz_elt_info_free(&pd->elt_buff, ei);
513 spin_unlock_bh(&pd->elt_buff.lock);
515 oz_tx_frame_free(pd, f);
516 if (pd->elt_buff.free_elts > pd->elt_buff.max_free_elts)
517 oz_trim_elt_pool(&pd->elt_buff);
519 /*------------------------------------------------------------------------------
520 * Context: softirq-serialized
522 static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data)
525 struct oz_tx_frame *f;
527 spin_lock(&pd->tx_frame_lock);
528 e = pd->last_sent_frame->next;
529 if (e == &pd->tx_queue) {
530 spin_unlock(&pd->tx_frame_lock);
533 f = container_of(e, struct oz_tx_frame, link);
535 if (f->skb != NULL) {
537 oz_tx_isoc_free(pd, f);
538 spin_unlock(&pd->tx_frame_lock);
540 oz_set_more_bit(skb);
541 oz_set_last_pkt_nb(pd, skb);
542 if ((int)atomic_read(&g_submitted_isoc) <
543 OZ_MAX_SUBMITTED_ISOC) {
544 if (dev_queue_xmit(skb) < 0) {
545 oz_trace2(OZ_TRACE_TX_FRAMES,
546 "Dropping ISOC Frame\n");
547 oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, NULL, 0);
550 atomic_inc(&g_submitted_isoc);
551 oz_trace2(OZ_TRACE_TX_FRAMES,
552 "Sending ISOC Frame, nb_isoc= %d\n",
553 pd->nb_queued_isoc_frames);
557 oz_trace2(OZ_TRACE_TX_FRAMES, "Dropping ISOC Frame>\n");
558 oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, NULL, 0);
563 pd->last_sent_frame = e;
564 skb = oz_build_frame(pd, f);
565 spin_unlock(&pd->tx_frame_lock);
567 oz_set_more_bit(skb);
568 oz_trace2(OZ_TRACE_TX_FRAMES, "TX frame PN=0x%x\n", f->hdr.pkt_num);
570 oz_event_log(OZ_EVT_TX_FRAME,
572 (((u16)f->hdr.control)<<8)|f->hdr.last_pkt_num,
573 NULL, f->hdr.pkt_num);
574 if (dev_queue_xmit(skb) < 0)
580 /*------------------------------------------------------------------------------
581 * Context: softirq-serialized
583 void oz_send_queued_frames(struct oz_pd *pd, int backlog)
585 while (oz_prepare_frame(pd, 0) >= 0)
588 switch (pd->mode & (OZ_F_ISOC_NO_ELTS | OZ_F_ISOC_ANYTIME)) {
590 case OZ_F_ISOC_NO_ELTS: {
591 backlog += pd->nb_queued_isoc_frames;
594 if (backlog > OZ_MAX_SUBMITTED_ISOC)
595 backlog = OZ_MAX_SUBMITTED_ISOC;
598 case OZ_NO_ELTS_ANYTIME: {
599 if ((backlog <= 0) && (pd->isoc_sent == 0))
610 if (oz_send_next_queued_frame(pd, backlog) < 0)
615 out: oz_prepare_frame(pd, 1);
616 oz_send_next_queued_frame(pd, 0);
618 /*------------------------------------------------------------------------------
621 static int oz_send_isoc_frame(struct oz_pd *pd)
624 struct net_device *dev = pd->net_dev;
625 struct oz_hdr *oz_hdr;
628 struct list_head list;
629 int total_size = sizeof(struct oz_hdr);
630 INIT_LIST_HEAD(&list);
632 oz_select_elts_for_tx(&pd->elt_buff, 1, &total_size,
633 pd->max_tx_size, &list);
634 if (list.next == &list)
636 skb = alloc_skb(total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC);
638 oz_trace("Cannot alloc skb\n");
639 oz_elt_info_free_chain(&pd->elt_buff, &list);
642 skb_reserve(skb, LL_RESERVED_SPACE(dev));
643 skb_reset_network_header(skb);
645 skb->protocol = htons(OZ_ETHERTYPE);
646 if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr,
647 dev->dev_addr, skb->len) < 0) {
651 oz_hdr = (struct oz_hdr *)skb_put(skb, total_size);
652 oz_hdr->control = (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC;
653 oz_hdr->last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK;
654 elt = (struct oz_elt *)(oz_hdr+1);
656 for (e = list.next; e != &list; e = e->next) {
657 struct oz_elt_info *ei;
658 ei = container_of(e, struct oz_elt_info, link);
659 memcpy(elt, ei->data, ei->length);
660 elt = oz_next_elt(elt);
662 oz_event_log(OZ_EVT_TX_ISOC, 0, 0, NULL, 0);
664 oz_elt_info_free_chain(&pd->elt_buff, &list);
667 /*------------------------------------------------------------------------------
668 * Context: softirq-serialized
670 void oz_retire_tx_frames(struct oz_pd *pd, u8 lpn)
673 struct oz_tx_frame *f;
674 struct list_head *first = NULL;
675 struct list_head *last = NULL;
679 spin_lock(&pd->tx_frame_lock);
680 e = pd->tx_queue.next;
681 while (e != &pd->tx_queue) {
682 f = container_of(e, struct oz_tx_frame, link);
683 pkt_num = le32_to_cpu(get_unaligned(&f->hdr.pkt_num));
684 diff = (lpn - (pkt_num & OZ_LAST_PN_MASK)) & OZ_LAST_PN_MASK;
685 if ((diff > OZ_LAST_PN_HALF_CYCLE) || (pkt_num == 0))
687 oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing pkt_num= %u, nb= %d\n",
688 pkt_num, pd->nb_queued_frames);
693 pd->nb_queued_frames--;
696 last->next->prev = &pd->tx_queue;
697 pd->tx_queue.next = last->next;
700 pd->last_sent_frame = &pd->tx_queue;
701 spin_unlock(&pd->tx_frame_lock);
703 f = container_of(first, struct oz_tx_frame, link);
705 oz_retire_frame(pd, f);
708 /*------------------------------------------------------------------------------
709 * Precondition: stream_lock must be held.
712 static struct oz_isoc_stream *pd_stream_find(struct oz_pd *pd, u8 ep_num)
715 struct oz_isoc_stream *st;
716 list_for_each(e, &pd->stream_list) {
717 st = container_of(e, struct oz_isoc_stream, link);
718 if (st->ep_num == ep_num)
723 /*------------------------------------------------------------------------------
726 int oz_isoc_stream_create(struct oz_pd *pd, u8 ep_num)
728 struct oz_isoc_stream *st =
729 kzalloc(sizeof(struct oz_isoc_stream), GFP_ATOMIC);
733 spin_lock_bh(&pd->stream_lock);
734 if (!pd_stream_find(pd, ep_num)) {
735 list_add(&st->link, &pd->stream_list);
738 spin_unlock_bh(&pd->stream_lock);
742 /*------------------------------------------------------------------------------
743 * Context: softirq or process
745 static void oz_isoc_stream_free(struct oz_isoc_stream *st)
750 /*------------------------------------------------------------------------------
753 int oz_isoc_stream_delete(struct oz_pd *pd, u8 ep_num)
755 struct oz_isoc_stream *st;
756 spin_lock_bh(&pd->stream_lock);
757 st = pd_stream_find(pd, ep_num);
760 spin_unlock_bh(&pd->stream_lock);
762 oz_isoc_stream_free(st);
765 /*------------------------------------------------------------------------------
768 static void oz_isoc_destructor(struct sk_buff *skb)
770 atomic_dec(&g_submitted_isoc);
771 oz_event_log(OZ_EVT_TX_ISOC_DONE, atomic_read(&g_submitted_isoc),
774 /*------------------------------------------------------------------------------
777 int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, const u8 *data, int len)
779 struct net_device *dev = pd->net_dev;
780 struct oz_isoc_stream *st;
782 struct sk_buff *skb = NULL;
783 struct oz_hdr *oz_hdr = NULL;
785 spin_lock_bh(&pd->stream_lock);
786 st = pd_stream_find(pd, ep_num);
790 nb_units = st->nb_units;
795 spin_unlock_bh(&pd->stream_lock);
799 /* Allocate enough space for max size frame. */
800 skb = alloc_skb(pd->max_tx_size + OZ_ALLOCATED_SPACE(dev),
804 /* Reserve the head room for lower layers. */
805 skb_reserve(skb, LL_RESERVED_SPACE(dev));
806 skb_reset_network_header(skb);
808 skb->protocol = htons(OZ_ETHERTYPE);
809 /* For audio packet set priority to AC_VO */
811 size = sizeof(struct oz_hdr) + sizeof(struct oz_isoc_large);
812 oz_hdr = (struct oz_hdr *)skb_put(skb, size);
814 memcpy(skb_put(skb, len), data, len);
816 if (++nb_units < pd->ms_per_isoc) {
817 spin_lock_bh(&pd->stream_lock);
819 st->nb_units = nb_units;
822 spin_unlock_bh(&pd->stream_lock);
825 struct oz_isoc_large iso;
826 spin_lock_bh(&pd->stream_lock);
827 iso.frame_number = st->frame_num;
828 st->frame_num += nb_units;
829 spin_unlock_bh(&pd->stream_lock);
831 (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC;
832 oz.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK;
834 iso.endpoint = ep_num;
835 iso.format = OZ_DATA_F_ISOC_LARGE;
836 iso.ms_data = nb_units;
837 memcpy(oz_hdr, &oz, sizeof(oz));
838 memcpy(oz_hdr+1, &iso, sizeof(iso));
839 if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr,
840 dev->dev_addr, skb->len) < 0)
843 skb->destructor = oz_isoc_destructor;
844 /*Queue for Xmit if mode is not ANYTIME*/
845 if (!(pd->mode & OZ_F_ISOC_ANYTIME)) {
846 struct oz_tx_frame *isoc_unit = NULL;
847 int nb = pd->nb_queued_isoc_frames;
848 if (nb >= pd->isoc_latency) {
849 oz_trace2(OZ_TRACE_TX_FRAMES,
850 "Dropping ISOC Unit nb= %d\n",
854 isoc_unit = oz_tx_frame_alloc(pd);
855 if (isoc_unit == NULL)
858 isoc_unit->skb = skb;
859 spin_lock_bh(&pd->tx_frame_lock);
860 list_add_tail(&isoc_unit->link, &pd->tx_queue);
861 pd->nb_queued_isoc_frames++;
862 spin_unlock_bh(&pd->tx_frame_lock);
863 oz_trace2(OZ_TRACE_TX_FRAMES,
864 "Added ISOC Frame to Tx Queue isoc_nb= %d, nb= %d\n",
865 pd->nb_queued_isoc_frames, pd->nb_queued_frames);
866 oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number,
867 skb, atomic_read(&g_submitted_isoc));
871 /*In ANYTIME mode Xmit unit immediately*/
872 if (atomic_read(&g_submitted_isoc) < OZ_MAX_SUBMITTED_ISOC) {
873 atomic_inc(&g_submitted_isoc);
874 oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number,
875 skb, atomic_read(&g_submitted_isoc));
876 if (dev_queue_xmit(skb) < 0) {
877 oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, NULL, 0);
883 out: oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, NULL, 0);
890 /*------------------------------------------------------------------------------
893 void oz_apps_init(void)
896 for (i = 0; i < OZ_APPID_MAX; i++)
897 if (g_app_if[i].init)
900 /*------------------------------------------------------------------------------
903 void oz_apps_term(void)
906 /* Terminate all the apps. */
907 for (i = 0; i < OZ_APPID_MAX; i++)
908 if (g_app_if[i].term)
911 /*------------------------------------------------------------------------------
912 * Context: softirq-serialized
914 void oz_handle_app_elt(struct oz_pd *pd, u8 app_id, struct oz_elt *elt)
916 const struct oz_app_if *ai;
917 if (app_id == 0 || app_id > OZ_APPID_MAX)
919 ai = &g_app_if[app_id-1];
922 /*------------------------------------------------------------------------------
923 * Context: softirq or process
925 void oz_pd_indicate_farewells(struct oz_pd *pd)
927 struct oz_farewell *f;
928 const struct oz_app_if *ai = &g_app_if[OZ_APPID_USB-1];
930 oz_polling_lock_bh();
931 if (list_empty(&pd->farewell_list)) {
932 oz_polling_unlock_bh();
935 f = list_first_entry(&pd->farewell_list,
936 struct oz_farewell, link);
938 oz_polling_unlock_bh();
940 ai->farewell(pd, f->ep_num, f->report, f->len);