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Merge tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubi
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / ozwpan / ozproto.c
1 /* -----------------------------------------------------------------------------
2 * Copyright (c) 2011 Ozmo Inc
3 * Released under the GNU General Public License Version 2 (GPLv2).
4 * -----------------------------------------------------------------------------
5 */
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>
12 #include <linux/ieee80211.h>
13 #include "ozconfig.h"
14 #include "ozprotocol.h"
15 #include "ozeltbuf.h"
16 #include "ozpd.h"
17 #include "ozproto.h"
18 #include "ozusbsvc.h"
19 #include "oztrace.h"
20 #include "ozappif.h"
21 #include "ozevent.h"
22 #include <asm/unaligned.h>
23 #include <linux/uaccess.h>
24 #include <net/psnap.h>
25 /*------------------------------------------------------------------------------
26 */
27 #define OZ_CF_CONN_SUCCESS 1
28 #define OZ_CF_CONN_FAILURE 2
29
30 #define OZ_DO_STOP 1
31 #define OZ_DO_SLEEP 2
32
33 /* States of the timer.
34 */
35 #define OZ_TIMER_IDLE 0
36 #define OZ_TIMER_SET 1
37 #define OZ_TIMER_IN_HANDLER 2
38
39 #define OZ_MAX_TIMER_POOL_SIZE 16
40
41 /*------------------------------------------------------------------------------
42 */
43 struct oz_binding {
44 struct packet_type ptype;
45 char name[OZ_MAX_BINDING_LEN];
46 struct oz_binding *next;
47 };
48
49 struct oz_timer {
50 struct list_head link;
51 struct oz_pd *pd;
52 unsigned long due_time;
53 int type;
54 };
55 /*------------------------------------------------------------------------------
56 * Static external variables.
57 */
58 static DEFINE_SPINLOCK(g_polling_lock);
59 static LIST_HEAD(g_pd_list);
60 static struct oz_binding *g_binding ;
61 static DEFINE_SPINLOCK(g_binding_lock);
62 static struct sk_buff_head g_rx_queue;
63 static u8 g_session_id;
64 static u16 g_apps = 0x1;
65 static int g_processing_rx;
66 static struct timer_list g_timer;
67 static struct oz_timer *g_cur_timer;
68 static struct list_head *g_timer_pool;
69 static int g_timer_pool_count;
70 static int g_timer_state = OZ_TIMER_IDLE;
71 static LIST_HEAD(g_timer_list);
72 /*------------------------------------------------------------------------------
73 */
74 static void oz_protocol_timer_start(void);
75 /*------------------------------------------------------------------------------
76 * Context: softirq-serialized
77 */
78 static u8 oz_get_new_session_id(u8 exclude)
79 {
80 if (++g_session_id == 0)
81 g_session_id = 1;
82 if (g_session_id == exclude) {
83 if (++g_session_id == 0)
84 g_session_id = 1;
85 }
86 return g_session_id;
87 }
88 /*------------------------------------------------------------------------------
89 * Context: softirq-serialized
90 */
91 static void oz_send_conn_rsp(struct oz_pd *pd, u8 status)
92 {
93 struct sk_buff *skb;
94 struct net_device *dev = pd->net_dev;
95 struct oz_hdr *oz_hdr;
96 struct oz_elt *elt;
97 struct oz_elt_connect_rsp *body;
98 int sz = sizeof(struct oz_hdr) + sizeof(struct oz_elt) +
99 sizeof(struct oz_elt_connect_rsp);
100 skb = alloc_skb(sz + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC);
101 if (skb == 0)
102 return;
103 skb_reserve(skb, LL_RESERVED_SPACE(dev));
104 skb_reset_network_header(skb);
105 oz_hdr = (struct oz_hdr *)skb_put(skb, sz);
106 elt = (struct oz_elt *)(oz_hdr+1);
107 body = (struct oz_elt_connect_rsp *)(elt+1);
108 skb->dev = dev;
109 skb->protocol = htons(OZ_ETHERTYPE);
110 /* Fill in device header */
111 if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr,
112 dev->dev_addr, skb->len) < 0) {
113 kfree_skb(skb);
114 return;
115 }
116 oz_hdr->control = (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT);
117 oz_hdr->last_pkt_num = 0;
118 put_unaligned(0, &oz_hdr->pkt_num);
119 oz_event_log(OZ_EVT_CONNECT_RSP, 0, 0, 0, 0);
120 elt->type = OZ_ELT_CONNECT_RSP;
121 elt->length = sizeof(struct oz_elt_connect_rsp);
122 memset(body, 0, sizeof(struct oz_elt_connect_rsp));
123 body->status = status;
124 if (status == 0) {
125 body->mode = pd->mode;
126 body->session_id = pd->session_id;
127 put_unaligned(cpu_to_le16(pd->total_apps), &body->apps);
128 }
129 oz_trace("TX: OZ_ELT_CONNECT_RSP %d", status);
130 dev_queue_xmit(skb);
131 return;
132 }
133 /*------------------------------------------------------------------------------
134 * Context: softirq-serialized
135 */
136 static void pd_set_keepalive(struct oz_pd *pd, u8 kalive)
137 {
138 unsigned long keep_alive = kalive & OZ_KALIVE_VALUE_MASK;
139
140 switch (kalive & OZ_KALIVE_TYPE_MASK) {
141 case OZ_KALIVE_SPECIAL:
142 pd->keep_alive_j =
143 oz_ms_to_jiffies(keep_alive * 1000*60*60*24*20);
144 break;
145 case OZ_KALIVE_SECS:
146 pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000);
147 break;
148 case OZ_KALIVE_MINS:
149 pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000*60);
150 break;
151 case OZ_KALIVE_HOURS:
152 pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000*60*60);
153 break;
154 default:
155 pd->keep_alive_j = 0;
156 }
157 oz_trace("Keepalive = %lu jiffies\n", pd->keep_alive_j);
158 }
159 /*------------------------------------------------------------------------------
160 * Context: softirq-serialized
161 */
162 static void pd_set_presleep(struct oz_pd *pd, u8 presleep)
163 {
164 if (presleep)
165 pd->presleep_j = oz_ms_to_jiffies(presleep*100);
166 else
167 pd->presleep_j = OZ_PRESLEEP_TOUT_J;
168 oz_trace("Presleep time = %lu jiffies\n", pd->presleep_j);
169 }
170 /*------------------------------------------------------------------------------
171 * Context: softirq-serialized
172 */
173 static struct oz_pd *oz_connect_req(struct oz_pd *cur_pd, struct oz_elt *elt,
174 u8 *pd_addr, struct net_device *net_dev)
175 {
176 struct oz_pd *pd;
177 struct oz_elt_connect_req *body =
178 (struct oz_elt_connect_req *)(elt+1);
179 u8 rsp_status = OZ_STATUS_SUCCESS;
180 u8 stop_needed = 0;
181 u16 new_apps = g_apps;
182 struct net_device *old_net_dev = 0;
183 struct oz_pd *free_pd = 0;
184 if (cur_pd) {
185 pd = cur_pd;
186 spin_lock_bh(&g_polling_lock);
187 } else {
188 struct oz_pd *pd2 = 0;
189 struct list_head *e;
190 pd = oz_pd_alloc(pd_addr);
191 if (pd == 0)
192 return 0;
193 pd->last_rx_time_j = jiffies;
194 spin_lock_bh(&g_polling_lock);
195 list_for_each(e, &g_pd_list) {
196 pd2 = container_of(e, struct oz_pd, link);
197 if (memcmp(pd2->mac_addr, pd_addr, ETH_ALEN) == 0) {
198 free_pd = pd;
199 pd = pd2;
200 break;
201 }
202 }
203 if (pd != pd2)
204 list_add_tail(&pd->link, &g_pd_list);
205 }
206 if (pd == 0) {
207 spin_unlock_bh(&g_polling_lock);
208 return 0;
209 }
210 if (pd->net_dev != net_dev) {
211 old_net_dev = pd->net_dev;
212 dev_hold(net_dev);
213 pd->net_dev = net_dev;
214 }
215 oz_trace("Host vendor: %d\n", body->host_vendor);
216 pd->max_tx_size = OZ_MAX_TX_SIZE;
217 pd->mode = body->mode;
218 pd->pd_info = body->pd_info;
219 if (pd->mode & OZ_F_ISOC_NO_ELTS) {
220 pd->ms_per_isoc = body->ms_per_isoc;
221 if (!pd->ms_per_isoc)
222 pd->ms_per_isoc = 4;
223
224 switch (body->ms_isoc_latency & OZ_LATENCY_MASK) {
225 case OZ_ONE_MS_LATENCY:
226 pd->isoc_latency = (body->ms_isoc_latency &
227 ~OZ_LATENCY_MASK) / pd->ms_per_isoc;
228 break;
229 case OZ_TEN_MS_LATENCY:
230 pd->isoc_latency = ((body->ms_isoc_latency &
231 ~OZ_LATENCY_MASK) * 10) / pd->ms_per_isoc;
232 break;
233 default:
234 pd->isoc_latency = OZ_MAX_TX_QUEUE_ISOC;
235 }
236 }
237 if (body->max_len_div16)
238 pd->max_tx_size = ((u16)body->max_len_div16)<<4;
239 oz_trace("Max frame:%u Ms per isoc:%u\n",
240 pd->max_tx_size, pd->ms_per_isoc);
241 pd->max_stream_buffering = 3*1024;
242 pd->timeout_time_j = jiffies + OZ_CONNECTION_TOUT_J;
243 pd->pulse_period_j = OZ_QUANTUM_J;
244 pd_set_presleep(pd, body->presleep);
245 pd_set_keepalive(pd, body->keep_alive);
246
247 new_apps &= le16_to_cpu(get_unaligned(&body->apps));
248 if ((new_apps & 0x1) && (body->session_id)) {
249 if (pd->session_id) {
250 if (pd->session_id != body->session_id) {
251 rsp_status = OZ_STATUS_SESSION_MISMATCH;
252 goto done;
253 }
254 } else {
255 new_apps &= ~0x1; /* Resume not permitted */
256 pd->session_id =
257 oz_get_new_session_id(body->session_id);
258 }
259 } else {
260 if (pd->session_id && !body->session_id) {
261 rsp_status = OZ_STATUS_SESSION_TEARDOWN;
262 stop_needed = 1;
263 } else {
264 new_apps &= ~0x1; /* Resume not permitted */
265 pd->session_id =
266 oz_get_new_session_id(body->session_id);
267 }
268 }
269 done:
270 if (rsp_status == OZ_STATUS_SUCCESS) {
271 u16 start_apps = new_apps & ~pd->total_apps & ~0x1;
272 u16 stop_apps = pd->total_apps & ~new_apps & ~0x1;
273 u16 resume_apps = new_apps & pd->paused_apps & ~0x1;
274 spin_unlock_bh(&g_polling_lock);
275 oz_pd_set_state(pd, OZ_PD_S_CONNECTED);
276 oz_timer_delete(pd, OZ_TIMER_STOP);
277 oz_trace("new_apps=0x%x total_apps=0x%x paused_apps=0x%x\n",
278 new_apps, pd->total_apps, pd->paused_apps);
279 if (start_apps) {
280 if (oz_services_start(pd, start_apps, 0))
281 rsp_status = OZ_STATUS_TOO_MANY_PDS;
282 }
283 if (resume_apps)
284 if (oz_services_start(pd, resume_apps, 1))
285 rsp_status = OZ_STATUS_TOO_MANY_PDS;
286 if (stop_apps)
287 oz_services_stop(pd, stop_apps, 0);
288 oz_pd_request_heartbeat(pd);
289 } else {
290 spin_unlock_bh(&g_polling_lock);
291 }
292 oz_send_conn_rsp(pd, rsp_status);
293 if (rsp_status != OZ_STATUS_SUCCESS) {
294 if (stop_needed)
295 oz_pd_stop(pd);
296 oz_pd_put(pd);
297 pd = 0;
298 }
299 if (old_net_dev)
300 dev_put(old_net_dev);
301 if (free_pd)
302 oz_pd_destroy(free_pd);
303 return pd;
304 }
305 /*------------------------------------------------------------------------------
306 * Context: softirq-serialized
307 */
308 static void oz_add_farewell(struct oz_pd *pd, u8 ep_num, u8 index,
309 u8 *report, u8 len)
310 {
311 struct oz_farewell *f;
312 struct oz_farewell *f2;
313 int found = 0;
314 f = kmalloc(sizeof(struct oz_farewell) + len - 1, GFP_ATOMIC);
315 if (!f)
316 return;
317 f->ep_num = ep_num;
318 f->index = index;
319 memcpy(f->report, report, len);
320 oz_trace("RX: Adding farewell report\n");
321 spin_lock(&g_polling_lock);
322 list_for_each_entry(f2, &pd->farewell_list, link) {
323 if ((f2->ep_num == ep_num) && (f2->index == index)) {
324 found = 1;
325 list_del(&f2->link);
326 break;
327 }
328 }
329 list_add_tail(&f->link, &pd->farewell_list);
330 spin_unlock(&g_polling_lock);
331 if (found)
332 kfree(f2);
333 }
334 /*------------------------------------------------------------------------------
335 * Context: softirq-serialized
336 */
337 static void oz_rx_frame(struct sk_buff *skb)
338 {
339 u8 *mac_hdr;
340 u8 *src_addr;
341 struct oz_elt *elt;
342 int length;
343 struct oz_pd *pd = 0;
344 struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb);
345 int dup = 0;
346 u32 pkt_num;
347
348 oz_event_log(OZ_EVT_RX_PROCESS, 0,
349 (((u16)oz_hdr->control)<<8)|oz_hdr->last_pkt_num,
350 0, oz_hdr->pkt_num);
351 oz_trace2(OZ_TRACE_RX_FRAMES,
352 "RX frame PN=0x%x LPN=0x%x control=0x%x\n",
353 oz_hdr->pkt_num, oz_hdr->last_pkt_num, oz_hdr->control);
354 mac_hdr = skb_mac_header(skb);
355 src_addr = &mac_hdr[ETH_ALEN] ;
356 length = skb->len;
357
358 /* Check the version field */
359 if (oz_get_prot_ver(oz_hdr->control) != OZ_PROTOCOL_VERSION) {
360 oz_trace("Incorrect protocol version: %d\n",
361 oz_get_prot_ver(oz_hdr->control));
362 goto done;
363 }
364
365 pkt_num = le32_to_cpu(get_unaligned(&oz_hdr->pkt_num));
366
367 pd = oz_pd_find(src_addr);
368 if (pd) {
369 pd->last_rx_time_j = jiffies;
370 oz_timer_add(pd, OZ_TIMER_TOUT,
371 pd->last_rx_time_j + pd->presleep_j, 1);
372 if (pkt_num != pd->last_rx_pkt_num) {
373 pd->last_rx_pkt_num = pkt_num;
374 } else {
375 dup = 1;
376 oz_trace("Duplicate frame\n");
377 }
378 }
379
380 if (pd && !dup && ((pd->mode & OZ_MODE_MASK) == OZ_MODE_TRIGGERED)) {
381 oz_trace2(OZ_TRACE_RX_FRAMES, "Received TRIGGER Frame\n");
382 pd->last_sent_frame = &pd->tx_queue;
383 if (oz_hdr->control & OZ_F_ACK) {
384 /* Retire completed frames */
385 oz_retire_tx_frames(pd, oz_hdr->last_pkt_num);
386 }
387 if ((oz_hdr->control & OZ_F_ACK_REQUESTED) &&
388 (pd->state == OZ_PD_S_CONNECTED)) {
389 int backlog = pd->nb_queued_frames;
390 pd->trigger_pkt_num = pkt_num;
391 /* Send queued frames */
392 oz_send_queued_frames(pd, backlog);
393 }
394 }
395
396 length -= sizeof(struct oz_hdr);
397 elt = (struct oz_elt *)((u8 *)oz_hdr + sizeof(struct oz_hdr));
398
399 while (length >= sizeof(struct oz_elt)) {
400 length -= sizeof(struct oz_elt) + elt->length;
401 if (length < 0)
402 break;
403 switch (elt->type) {
404 case OZ_ELT_CONNECT_REQ:
405 oz_event_log(OZ_EVT_CONNECT_REQ, 0, 0, 0, 0);
406 oz_trace("RX: OZ_ELT_CONNECT_REQ\n");
407 pd = oz_connect_req(pd, elt, src_addr, skb->dev);
408 break;
409 case OZ_ELT_DISCONNECT:
410 oz_trace("RX: OZ_ELT_DISCONNECT\n");
411 if (pd)
412 oz_pd_sleep(pd);
413 break;
414 case OZ_ELT_UPDATE_PARAM_REQ: {
415 struct oz_elt_update_param *body =
416 (struct oz_elt_update_param *)(elt + 1);
417 oz_trace("RX: OZ_ELT_UPDATE_PARAM_REQ\n");
418 if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
419 spin_lock(&g_polling_lock);
420 pd_set_keepalive(pd, body->keepalive);
421 pd_set_presleep(pd, body->presleep);
422 spin_unlock(&g_polling_lock);
423 }
424 }
425 break;
426 case OZ_ELT_FAREWELL_REQ: {
427 struct oz_elt_farewell *body =
428 (struct oz_elt_farewell *)(elt + 1);
429 oz_trace("RX: OZ_ELT_FAREWELL_REQ\n");
430 oz_add_farewell(pd, body->ep_num,
431 body->index, body->report,
432 elt->length + 1 - sizeof(*body));
433 }
434 break;
435 case OZ_ELT_APP_DATA:
436 if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
437 struct oz_app_hdr *app_hdr =
438 (struct oz_app_hdr *)(elt+1);
439 if (dup)
440 break;
441 oz_handle_app_elt(pd, app_hdr->app_id, elt);
442 }
443 break;
444 default:
445 oz_trace("RX: Unknown elt %02x\n", elt->type);
446 }
447 elt = oz_next_elt(elt);
448 }
449 done:
450 if (pd)
451 oz_pd_put(pd);
452 consume_skb(skb);
453 }
454 /*------------------------------------------------------------------------------
455 * Context: process
456 */
457 void oz_protocol_term(void)
458 {
459 struct list_head *chain = 0;
460 del_timer_sync(&g_timer);
461 /* Walk the list of bindings and remove each one.
462 */
463 spin_lock_bh(&g_binding_lock);
464 while (g_binding) {
465 struct oz_binding *b = g_binding;
466 g_binding = b->next;
467 spin_unlock_bh(&g_binding_lock);
468 dev_remove_pack(&b->ptype);
469 if (b->ptype.dev)
470 dev_put(b->ptype.dev);
471 kfree(b);
472 spin_lock_bh(&g_binding_lock);
473 }
474 spin_unlock_bh(&g_binding_lock);
475 /* Walk the list of PDs and stop each one. This causes the PD to be
476 * removed from the list so we can just pull each one from the head
477 * of the list.
478 */
479 spin_lock_bh(&g_polling_lock);
480 while (!list_empty(&g_pd_list)) {
481 struct oz_pd *pd =
482 list_first_entry(&g_pd_list, struct oz_pd, link);
483 oz_pd_get(pd);
484 spin_unlock_bh(&g_polling_lock);
485 oz_pd_stop(pd);
486 oz_pd_put(pd);
487 spin_lock_bh(&g_polling_lock);
488 }
489 chain = g_timer_pool;
490 g_timer_pool = 0;
491 spin_unlock_bh(&g_polling_lock);
492 while (chain) {
493 struct oz_timer *t = container_of(chain, struct oz_timer, link);
494 chain = chain->next;
495 kfree(t);
496 }
497 oz_trace("Protocol stopped\n");
498 }
499 /*------------------------------------------------------------------------------
500 * Context: softirq
501 */
502 static void oz_pd_handle_timer(struct oz_pd *pd, int type)
503 {
504 switch (type) {
505 case OZ_TIMER_TOUT:
506 oz_pd_sleep(pd);
507 break;
508 case OZ_TIMER_STOP:
509 oz_pd_stop(pd);
510 break;
511 case OZ_TIMER_HEARTBEAT: {
512 u16 apps = 0;
513 spin_lock_bh(&g_polling_lock);
514 pd->heartbeat_requested = 0;
515 if (pd->state & OZ_PD_S_CONNECTED)
516 apps = pd->total_apps;
517 spin_unlock_bh(&g_polling_lock);
518 if (apps)
519 oz_pd_heartbeat(pd, apps);
520 }
521 break;
522 }
523 }
524 /*------------------------------------------------------------------------------
525 * Context: softirq
526 */
527 static void oz_protocol_timer(unsigned long arg)
528 {
529 struct oz_timer *t;
530 struct oz_timer *t2;
531 struct oz_pd *pd;
532 spin_lock_bh(&g_polling_lock);
533 if (!g_cur_timer) {
534 /* This happens if we remove the current timer but can't stop
535 * the timer from firing. In this case just get out.
536 */
537 oz_event_log(OZ_EVT_TIMER, 0, 0, 0, 0);
538 spin_unlock_bh(&g_polling_lock);
539 return;
540 }
541 g_timer_state = OZ_TIMER_IN_HANDLER;
542 t = g_cur_timer;
543 g_cur_timer = 0;
544 list_del(&t->link);
545 spin_unlock_bh(&g_polling_lock);
546 do {
547 pd = t->pd;
548 oz_event_log(OZ_EVT_TIMER, 0, t->type, 0, 0);
549 oz_pd_handle_timer(pd, t->type);
550 spin_lock_bh(&g_polling_lock);
551 if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) {
552 t->link.next = g_timer_pool;
553 g_timer_pool = &t->link;
554 g_timer_pool_count++;
555 t = 0;
556 }
557 if (!list_empty(&g_timer_list)) {
558 t2 = container_of(g_timer_list.next,
559 struct oz_timer, link);
560 if (time_before_eq(t2->due_time, jiffies))
561 list_del(&t2->link);
562 else
563 t2 = 0;
564 } else {
565 t2 = 0;
566 }
567 spin_unlock_bh(&g_polling_lock);
568 oz_pd_put(pd);
569 if (t)
570 kfree(t);
571 t = t2;
572 } while (t);
573 g_timer_state = OZ_TIMER_IDLE;
574 oz_protocol_timer_start();
575 }
576 /*------------------------------------------------------------------------------
577 * Context: softirq
578 */
579 static void oz_protocol_timer_start(void)
580 {
581 spin_lock_bh(&g_polling_lock);
582 if (!list_empty(&g_timer_list)) {
583 g_cur_timer =
584 container_of(g_timer_list.next, struct oz_timer, link);
585 if (g_timer_state == OZ_TIMER_SET) {
586 oz_event_log(OZ_EVT_TIMER_CTRL, 3,
587 (u16)g_cur_timer->type, 0,
588 (unsigned)g_cur_timer->due_time);
589 mod_timer(&g_timer, g_cur_timer->due_time);
590 } else {
591 oz_event_log(OZ_EVT_TIMER_CTRL, 4,
592 (u16)g_cur_timer->type, 0,
593 (unsigned)g_cur_timer->due_time);
594 g_timer.expires = g_cur_timer->due_time;
595 g_timer.function = oz_protocol_timer;
596 g_timer.data = 0;
597 add_timer(&g_timer);
598 }
599 g_timer_state = OZ_TIMER_SET;
600 } else {
601 oz_trace("No queued timers\n");
602 }
603 spin_unlock_bh(&g_polling_lock);
604 }
605 /*------------------------------------------------------------------------------
606 * Context: softirq or process
607 */
608 void oz_timer_add(struct oz_pd *pd, int type, unsigned long due_time,
609 int remove)
610 {
611 struct list_head *e;
612 struct oz_timer *t = 0;
613 int restart_needed = 0;
614 oz_event_log(OZ_EVT_TIMER_CTRL, 1, (u16)type, 0, (unsigned)due_time);
615 spin_lock(&g_polling_lock);
616 if (remove) {
617 list_for_each(e, &g_timer_list) {
618 t = container_of(e, struct oz_timer, link);
619 if ((t->pd == pd) && (t->type == type)) {
620 if (g_cur_timer == t) {
621 restart_needed = 1;
622 g_cur_timer = 0;
623 }
624 list_del(e);
625 break;
626 }
627 t = 0;
628 }
629 }
630 if (!t) {
631 if (g_timer_pool) {
632 t = container_of(g_timer_pool, struct oz_timer, link);
633 g_timer_pool = g_timer_pool->next;
634 g_timer_pool_count--;
635 } else {
636 t = kmalloc(sizeof(struct oz_timer), GFP_ATOMIC);
637 }
638 if (t) {
639 t->pd = pd;
640 t->type = type;
641 oz_pd_get(pd);
642 }
643 }
644 if (t) {
645 struct oz_timer *t2;
646 t->due_time = due_time;
647 list_for_each(e, &g_timer_list) {
648 t2 = container_of(e, struct oz_timer, link);
649 if (time_before(due_time, t2->due_time)) {
650 if (t2 == g_cur_timer) {
651 g_cur_timer = 0;
652 restart_needed = 1;
653 }
654 break;
655 }
656 }
657 list_add_tail(&t->link, e);
658 }
659 if (g_timer_state == OZ_TIMER_IDLE)
660 restart_needed = 1;
661 else if (g_timer_state == OZ_TIMER_IN_HANDLER)
662 restart_needed = 0;
663 spin_unlock(&g_polling_lock);
664 if (restart_needed)
665 oz_protocol_timer_start();
666 }
667 /*------------------------------------------------------------------------------
668 * Context: softirq or process
669 */
670 void oz_timer_delete(struct oz_pd *pd, int type)
671 {
672 struct list_head *chain = 0;
673 struct oz_timer *t;
674 struct oz_timer *n;
675 int restart_needed = 0;
676 int release = 0;
677 oz_event_log(OZ_EVT_TIMER_CTRL, 2, (u16)type, 0, 0);
678 spin_lock(&g_polling_lock);
679 list_for_each_entry_safe(t, n, &g_timer_list, link) {
680 if ((t->pd == pd) && ((type == 0) || (t->type == type))) {
681 if (g_cur_timer == t) {
682 restart_needed = 1;
683 g_cur_timer = 0;
684 del_timer(&g_timer);
685 }
686 list_del(&t->link);
687 release++;
688 if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) {
689 t->link.next = g_timer_pool;
690 g_timer_pool = &t->link;
691 g_timer_pool_count++;
692 } else {
693 t->link.next = chain;
694 chain = &t->link;
695 }
696 if (type)
697 break;
698 }
699 }
700 if (g_timer_state == OZ_TIMER_IN_HANDLER)
701 restart_needed = 0;
702 else if (restart_needed)
703 g_timer_state = OZ_TIMER_IDLE;
704 spin_unlock(&g_polling_lock);
705 if (restart_needed)
706 oz_protocol_timer_start();
707 while (release--)
708 oz_pd_put(pd);
709 while (chain) {
710 t = container_of(chain, struct oz_timer, link);
711 chain = chain->next;
712 kfree(t);
713 }
714 }
715 /*------------------------------------------------------------------------------
716 * Context: softirq or process
717 */
718 void oz_pd_request_heartbeat(struct oz_pd *pd)
719 {
720 unsigned long now = jiffies;
721 unsigned long t;
722 spin_lock(&g_polling_lock);
723 if (pd->heartbeat_requested) {
724 spin_unlock(&g_polling_lock);
725 return;
726 }
727 if (pd->pulse_period_j)
728 t = ((now / pd->pulse_period_j) + 1) * pd->pulse_period_j;
729 else
730 t = now + 1;
731 pd->heartbeat_requested = 1;
732 spin_unlock(&g_polling_lock);
733 oz_timer_add(pd, OZ_TIMER_HEARTBEAT, t, 0);
734 }
735 /*------------------------------------------------------------------------------
736 * Context: softirq or process
737 */
738 struct oz_pd *oz_pd_find(u8 *mac_addr)
739 {
740 struct oz_pd *pd;
741 struct list_head *e;
742 spin_lock_bh(&g_polling_lock);
743 list_for_each(e, &g_pd_list) {
744 pd = container_of(e, struct oz_pd, link);
745 if (memcmp(pd->mac_addr, mac_addr, ETH_ALEN) == 0) {
746 atomic_inc(&pd->ref_count);
747 spin_unlock_bh(&g_polling_lock);
748 return pd;
749 }
750 }
751 spin_unlock_bh(&g_polling_lock);
752 return 0;
753 }
754 /*------------------------------------------------------------------------------
755 * Context: process
756 */
757 void oz_app_enable(int app_id, int enable)
758 {
759 if (app_id <= OZ_APPID_MAX) {
760 spin_lock_bh(&g_polling_lock);
761 if (enable)
762 g_apps |= (1<<app_id);
763 else
764 g_apps &= ~(1<<app_id);
765 spin_unlock_bh(&g_polling_lock);
766 }
767 }
768 /*------------------------------------------------------------------------------
769 * Context: softirq
770 */
771 static int oz_pkt_recv(struct sk_buff *skb, struct net_device *dev,
772 struct packet_type *pt, struct net_device *orig_dev)
773 {
774 oz_event_log(OZ_EVT_RX_FRAME, 0, 0, 0, 0);
775 skb = skb_share_check(skb, GFP_ATOMIC);
776 if (skb == 0)
777 return 0;
778 spin_lock_bh(&g_rx_queue.lock);
779 if (g_processing_rx) {
780 /* We already hold the lock so use __ variant.
781 */
782 __skb_queue_head(&g_rx_queue, skb);
783 spin_unlock_bh(&g_rx_queue.lock);
784 } else {
785 g_processing_rx = 1;
786 do {
787
788 spin_unlock_bh(&g_rx_queue.lock);
789 oz_rx_frame(skb);
790 spin_lock_bh(&g_rx_queue.lock);
791 if (skb_queue_empty(&g_rx_queue)) {
792 g_processing_rx = 0;
793 spin_unlock_bh(&g_rx_queue.lock);
794 break;
795 }
796 /* We already hold the lock so use __ variant.
797 */
798 skb = __skb_dequeue(&g_rx_queue);
799 } while (1);
800 }
801 return 0;
802 }
803 /*------------------------------------------------------------------------------
804 * Context: process
805 */
806 void oz_binding_add(char *net_dev)
807 {
808 struct oz_binding *binding;
809
810 binding = kmalloc(sizeof(struct oz_binding), GFP_KERNEL);
811 if (binding) {
812 binding->ptype.type = __constant_htons(OZ_ETHERTYPE);
813 binding->ptype.func = oz_pkt_recv;
814 memcpy(binding->name, net_dev, OZ_MAX_BINDING_LEN);
815 if (net_dev && *net_dev) {
816 oz_trace("Adding binding: %s\n", net_dev);
817 binding->ptype.dev =
818 dev_get_by_name(&init_net, net_dev);
819 if (binding->ptype.dev == 0) {
820 oz_trace("Netdev %s not found\n", net_dev);
821 kfree(binding);
822 binding = 0;
823 }
824 } else {
825 oz_trace("Binding to all netcards\n");
826 binding->ptype.dev = 0;
827 }
828 if (binding) {
829 dev_add_pack(&binding->ptype);
830 spin_lock_bh(&g_binding_lock);
831 binding->next = g_binding;
832 g_binding = binding;
833 spin_unlock_bh(&g_binding_lock);
834 }
835 }
836 }
837 /*------------------------------------------------------------------------------
838 * Context: process
839 */
840 static int compare_binding_name(char *s1, char *s2)
841 {
842 int i;
843 for (i = 0; i < OZ_MAX_BINDING_LEN; i++) {
844 if (*s1 != *s2)
845 return 0;
846 if (!*s1++)
847 return 1;
848 s2++;
849 }
850 return 1;
851 }
852 /*------------------------------------------------------------------------------
853 * Context: process
854 */
855 static void pd_stop_all_for_device(struct net_device *net_dev)
856 {
857 struct list_head h;
858 struct oz_pd *pd;
859 struct oz_pd *n;
860 INIT_LIST_HEAD(&h);
861 spin_lock_bh(&g_polling_lock);
862 list_for_each_entry_safe(pd, n, &g_pd_list, link) {
863 if (pd->net_dev == net_dev) {
864 list_move(&pd->link, &h);
865 oz_pd_get(pd);
866 }
867 }
868 spin_unlock_bh(&g_polling_lock);
869 while (!list_empty(&h)) {
870 pd = list_first_entry(&h, struct oz_pd, link);
871 oz_pd_stop(pd);
872 oz_pd_put(pd);
873 }
874 }
875 /*------------------------------------------------------------------------------
876 * Context: process
877 */
878 void oz_binding_remove(char *net_dev)
879 {
880 struct oz_binding *binding = 0;
881 struct oz_binding **link;
882 oz_trace("Removing binding: %s\n", net_dev);
883 spin_lock_bh(&g_binding_lock);
884 binding = g_binding;
885 link = &g_binding;
886 while (binding) {
887 if (compare_binding_name(binding->name, net_dev)) {
888 oz_trace("Binding '%s' found\n", net_dev);
889 *link = binding->next;
890 break;
891 } else {
892 link = &binding;
893 binding = binding->next;
894 }
895 }
896 spin_unlock_bh(&g_binding_lock);
897 if (binding) {
898 dev_remove_pack(&binding->ptype);
899 if (binding->ptype.dev) {
900 dev_put(binding->ptype.dev);
901 pd_stop_all_for_device(binding->ptype.dev);
902 }
903 kfree(binding);
904 }
905 }
906 /*------------------------------------------------------------------------------
907 * Context: process
908 */
909 static char *oz_get_next_device_name(char *s, char *dname, int max_size)
910 {
911 while (*s == ',')
912 s++;
913 while (*s && (*s != ',') && max_size > 1) {
914 *dname++ = *s++;
915 max_size--;
916 }
917 *dname = 0;
918 return s;
919 }
920 /*------------------------------------------------------------------------------
921 * Context: process
922 */
923 int oz_protocol_init(char *devs)
924 {
925 skb_queue_head_init(&g_rx_queue);
926 if (devs && (devs[0] == '*')) {
927 oz_binding_add(0);
928 } else {
929 char d[32];
930 while (*devs) {
931 devs = oz_get_next_device_name(devs, d, sizeof(d));
932 if (d[0])
933 oz_binding_add(d);
934 }
935 }
936 init_timer(&g_timer);
937 return 0;
938 }
939 /*------------------------------------------------------------------------------
940 * Context: process
941 */
942 int oz_get_pd_list(struct oz_mac_addr *addr, int max_count)
943 {
944 struct oz_pd *pd;
945 struct list_head *e;
946 int count = 0;
947 spin_lock_bh(&g_polling_lock);
948 list_for_each(e, &g_pd_list) {
949 if (count >= max_count)
950 break;
951 pd = container_of(e, struct oz_pd, link);
952 memcpy(&addr[count++], pd->mac_addr, ETH_ALEN);
953 }
954 spin_unlock_bh(&g_polling_lock);
955 return count;
956 }
957 /*------------------------------------------------------------------------------
958 */
959 void oz_polling_lock_bh(void)
960 {
961 spin_lock_bh(&g_polling_lock);
962 }
963 /*------------------------------------------------------------------------------
964 */
965 void oz_polling_unlock_bh(void)
966 {
967 spin_unlock_bh(&g_polling_lock);
968 }
kernel source for telekom puls (alcatel/mediatek)