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Merge branches 'acpica', 'acpidump', 'intel-idle', 'misc', 'module_acpi_driver-simpli...
[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 if (body->max_len_div16)
225 pd->max_tx_size = ((u16)body->max_len_div16)<<4;
226 oz_trace("Max frame:%u Ms per isoc:%u\n",
227 pd->max_tx_size, pd->ms_per_isoc);
228 pd->max_stream_buffering = 3*1024;
229 pd->timeout_time_j = jiffies + OZ_CONNECTION_TOUT_J;
230 pd->pulse_period_j = OZ_QUANTUM_J;
231 pd_set_presleep(pd, body->presleep);
232 pd_set_keepalive(pd, body->keep_alive);
233
234 new_apps &= le16_to_cpu(get_unaligned(&body->apps));
235 if ((new_apps & 0x1) && (body->session_id)) {
236 if (pd->session_id) {
237 if (pd->session_id != body->session_id) {
238 rsp_status = OZ_STATUS_SESSION_MISMATCH;
239 goto done;
240 }
241 } else {
242 new_apps &= ~0x1; /* Resume not permitted */
243 pd->session_id =
244 oz_get_new_session_id(body->session_id);
245 }
246 } else {
247 if (pd->session_id && !body->session_id) {
248 rsp_status = OZ_STATUS_SESSION_TEARDOWN;
249 stop_needed = 1;
250 } else {
251 new_apps &= ~0x1; /* Resume not permitted */
252 pd->session_id =
253 oz_get_new_session_id(body->session_id);
254 }
255 }
256 done:
257 if (rsp_status == OZ_STATUS_SUCCESS) {
258 u16 start_apps = new_apps & ~pd->total_apps & ~0x1;
259 u16 stop_apps = pd->total_apps & ~new_apps & ~0x1;
260 u16 resume_apps = new_apps & pd->paused_apps & ~0x1;
261 spin_unlock_bh(&g_polling_lock);
262 oz_pd_set_state(pd, OZ_PD_S_CONNECTED);
263 oz_timer_delete(pd, OZ_TIMER_STOP);
264 oz_trace("new_apps=0x%x total_apps=0x%x paused_apps=0x%x\n",
265 new_apps, pd->total_apps, pd->paused_apps);
266 if (start_apps) {
267 if (oz_services_start(pd, start_apps, 0))
268 rsp_status = OZ_STATUS_TOO_MANY_PDS;
269 }
270 if (resume_apps)
271 if (oz_services_start(pd, resume_apps, 1))
272 rsp_status = OZ_STATUS_TOO_MANY_PDS;
273 if (stop_apps)
274 oz_services_stop(pd, stop_apps, 0);
275 oz_pd_request_heartbeat(pd);
276 } else {
277 spin_unlock_bh(&g_polling_lock);
278 }
279 oz_send_conn_rsp(pd, rsp_status);
280 if (rsp_status != OZ_STATUS_SUCCESS) {
281 if (stop_needed)
282 oz_pd_stop(pd);
283 oz_pd_put(pd);
284 pd = 0;
285 }
286 if (old_net_dev)
287 dev_put(old_net_dev);
288 if (free_pd)
289 oz_pd_destroy(free_pd);
290 return pd;
291 }
292 /*------------------------------------------------------------------------------
293 * Context: softirq-serialized
294 */
295 static void oz_add_farewell(struct oz_pd *pd, u8 ep_num, u8 index,
296 u8 *report, u8 len)
297 {
298 struct oz_farewell *f;
299 struct oz_farewell *f2;
300 int found = 0;
301 f = kmalloc(sizeof(struct oz_farewell) + len - 1, GFP_ATOMIC);
302 if (!f)
303 return;
304 f->ep_num = ep_num;
305 f->index = index;
306 memcpy(f->report, report, len);
307 oz_trace("RX: Adding farewell report\n");
308 spin_lock(&g_polling_lock);
309 list_for_each_entry(f2, &pd->farewell_list, link) {
310 if ((f2->ep_num == ep_num) && (f2->index == index)) {
311 found = 1;
312 list_del(&f2->link);
313 break;
314 }
315 }
316 list_add_tail(&f->link, &pd->farewell_list);
317 spin_unlock(&g_polling_lock);
318 if (found)
319 kfree(f2);
320 }
321 /*------------------------------------------------------------------------------
322 * Context: softirq-serialized
323 */
324 static void oz_rx_frame(struct sk_buff *skb)
325 {
326 u8 *mac_hdr;
327 u8 *src_addr;
328 struct oz_elt *elt;
329 int length;
330 struct oz_pd *pd = 0;
331 struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb);
332 int dup = 0;
333 u32 pkt_num;
334
335 oz_event_log(OZ_EVT_RX_PROCESS, 0,
336 (((u16)oz_hdr->control)<<8)|oz_hdr->last_pkt_num,
337 0, oz_hdr->pkt_num);
338 oz_trace2(OZ_TRACE_RX_FRAMES,
339 "RX frame PN=0x%x LPN=0x%x control=0x%x\n",
340 oz_hdr->pkt_num, oz_hdr->last_pkt_num, oz_hdr->control);
341 mac_hdr = skb_mac_header(skb);
342 src_addr = &mac_hdr[ETH_ALEN] ;
343 length = skb->len;
344
345 /* Check the version field */
346 if (oz_get_prot_ver(oz_hdr->control) != OZ_PROTOCOL_VERSION) {
347 oz_trace("Incorrect protocol version: %d\n",
348 oz_get_prot_ver(oz_hdr->control));
349 goto done;
350 }
351
352 pkt_num = le32_to_cpu(get_unaligned(&oz_hdr->pkt_num));
353
354 pd = oz_pd_find(src_addr);
355 if (pd) {
356 pd->last_rx_time_j = jiffies;
357 oz_timer_add(pd, OZ_TIMER_TOUT,
358 pd->last_rx_time_j + pd->presleep_j, 1);
359 if (pkt_num != pd->last_rx_pkt_num) {
360 pd->last_rx_pkt_num = pkt_num;
361 } else {
362 dup = 1;
363 oz_trace("Duplicate frame\n");
364 }
365 }
366
367 if (pd && !dup && ((pd->mode & OZ_MODE_MASK) == OZ_MODE_TRIGGERED)) {
368 oz_trace2(OZ_TRACE_RX_FRAMES, "Received TRIGGER Frame\n");
369 pd->last_sent_frame = &pd->tx_queue;
370 if (oz_hdr->control & OZ_F_ACK) {
371 /* Retire completed frames */
372 oz_retire_tx_frames(pd, oz_hdr->last_pkt_num);
373 }
374 if ((oz_hdr->control & OZ_F_ACK_REQUESTED) &&
375 (pd->state == OZ_PD_S_CONNECTED)) {
376 int backlog = pd->nb_queued_frames;
377 pd->trigger_pkt_num = pkt_num;
378 /* Send queued frames */
379 oz_send_queued_frames(pd, backlog);
380 }
381 }
382
383 length -= sizeof(struct oz_hdr);
384 elt = (struct oz_elt *)((u8 *)oz_hdr + sizeof(struct oz_hdr));
385
386 while (length >= sizeof(struct oz_elt)) {
387 length -= sizeof(struct oz_elt) + elt->length;
388 if (length < 0)
389 break;
390 switch (elt->type) {
391 case OZ_ELT_CONNECT_REQ:
392 oz_event_log(OZ_EVT_CONNECT_REQ, 0, 0, 0, 0);
393 oz_trace("RX: OZ_ELT_CONNECT_REQ\n");
394 pd = oz_connect_req(pd, elt, src_addr, skb->dev);
395 break;
396 case OZ_ELT_DISCONNECT:
397 oz_trace("RX: OZ_ELT_DISCONNECT\n");
398 if (pd)
399 oz_pd_sleep(pd);
400 break;
401 case OZ_ELT_UPDATE_PARAM_REQ: {
402 struct oz_elt_update_param *body =
403 (struct oz_elt_update_param *)(elt + 1);
404 oz_trace("RX: OZ_ELT_UPDATE_PARAM_REQ\n");
405 if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
406 spin_lock(&g_polling_lock);
407 pd_set_keepalive(pd, body->keepalive);
408 pd_set_presleep(pd, body->presleep);
409 spin_unlock(&g_polling_lock);
410 }
411 }
412 break;
413 case OZ_ELT_FAREWELL_REQ: {
414 struct oz_elt_farewell *body =
415 (struct oz_elt_farewell *)(elt + 1);
416 oz_trace("RX: OZ_ELT_FAREWELL_REQ\n");
417 oz_add_farewell(pd, body->ep_num,
418 body->index, body->report,
419 elt->length + 1 - sizeof(*body));
420 }
421 break;
422 case OZ_ELT_APP_DATA:
423 if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
424 struct oz_app_hdr *app_hdr =
425 (struct oz_app_hdr *)(elt+1);
426 if (dup)
427 break;
428 oz_handle_app_elt(pd, app_hdr->app_id, elt);
429 }
430 break;
431 default:
432 oz_trace("RX: Unknown elt %02x\n", elt->type);
433 }
434 elt = oz_next_elt(elt);
435 }
436 done:
437 if (pd)
438 oz_pd_put(pd);
439 consume_skb(skb);
440 }
441 /*------------------------------------------------------------------------------
442 * Context: process
443 */
444 void oz_protocol_term(void)
445 {
446 struct list_head *chain = 0;
447 del_timer_sync(&g_timer);
448 /* Walk the list of bindings and remove each one.
449 */
450 spin_lock_bh(&g_binding_lock);
451 while (g_binding) {
452 struct oz_binding *b = g_binding;
453 g_binding = b->next;
454 spin_unlock_bh(&g_binding_lock);
455 dev_remove_pack(&b->ptype);
456 if (b->ptype.dev)
457 dev_put(b->ptype.dev);
458 kfree(b);
459 spin_lock_bh(&g_binding_lock);
460 }
461 spin_unlock_bh(&g_binding_lock);
462 /* Walk the list of PDs and stop each one. This causes the PD to be
463 * removed from the list so we can just pull each one from the head
464 * of the list.
465 */
466 spin_lock_bh(&g_polling_lock);
467 while (!list_empty(&g_pd_list)) {
468 struct oz_pd *pd =
469 list_first_entry(&g_pd_list, struct oz_pd, link);
470 oz_pd_get(pd);
471 spin_unlock_bh(&g_polling_lock);
472 oz_pd_stop(pd);
473 oz_pd_put(pd);
474 spin_lock_bh(&g_polling_lock);
475 }
476 chain = g_timer_pool;
477 g_timer_pool = 0;
478 spin_unlock_bh(&g_polling_lock);
479 while (chain) {
480 struct oz_timer *t = container_of(chain, struct oz_timer, link);
481 chain = chain->next;
482 kfree(t);
483 }
484 oz_trace("Protocol stopped\n");
485 }
486 /*------------------------------------------------------------------------------
487 * Context: softirq
488 */
489 static void oz_pd_handle_timer(struct oz_pd *pd, int type)
490 {
491 switch (type) {
492 case OZ_TIMER_TOUT:
493 oz_pd_sleep(pd);
494 break;
495 case OZ_TIMER_STOP:
496 oz_pd_stop(pd);
497 break;
498 case OZ_TIMER_HEARTBEAT: {
499 u16 apps = 0;
500 spin_lock_bh(&g_polling_lock);
501 pd->heartbeat_requested = 0;
502 if (pd->state & OZ_PD_S_CONNECTED)
503 apps = pd->total_apps;
504 spin_unlock_bh(&g_polling_lock);
505 if (apps)
506 oz_pd_heartbeat(pd, apps);
507 }
508 break;
509 }
510 }
511 /*------------------------------------------------------------------------------
512 * Context: softirq
513 */
514 static void oz_protocol_timer(unsigned long arg)
515 {
516 struct oz_timer *t;
517 struct oz_timer *t2;
518 struct oz_pd *pd;
519 spin_lock_bh(&g_polling_lock);
520 if (!g_cur_timer) {
521 /* This happens if we remove the current timer but can't stop
522 * the timer from firing. In this case just get out.
523 */
524 oz_event_log(OZ_EVT_TIMER, 0, 0, 0, 0);
525 spin_unlock_bh(&g_polling_lock);
526 return;
527 }
528 g_timer_state = OZ_TIMER_IN_HANDLER;
529 t = g_cur_timer;
530 g_cur_timer = 0;
531 list_del(&t->link);
532 spin_unlock_bh(&g_polling_lock);
533 do {
534 pd = t->pd;
535 oz_event_log(OZ_EVT_TIMER, 0, t->type, 0, 0);
536 oz_pd_handle_timer(pd, t->type);
537 spin_lock_bh(&g_polling_lock);
538 if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) {
539 t->link.next = g_timer_pool;
540 g_timer_pool = &t->link;
541 g_timer_pool_count++;
542 t = 0;
543 }
544 if (!list_empty(&g_timer_list)) {
545 t2 = container_of(g_timer_list.next,
546 struct oz_timer, link);
547 if (time_before_eq(t2->due_time, jiffies))
548 list_del(&t2->link);
549 else
550 t2 = 0;
551 } else {
552 t2 = 0;
553 }
554 spin_unlock_bh(&g_polling_lock);
555 oz_pd_put(pd);
556 if (t)
557 kfree(t);
558 t = t2;
559 } while (t);
560 g_timer_state = OZ_TIMER_IDLE;
561 oz_protocol_timer_start();
562 }
563 /*------------------------------------------------------------------------------
564 * Context: softirq
565 */
566 static void oz_protocol_timer_start(void)
567 {
568 spin_lock_bh(&g_polling_lock);
569 if (!list_empty(&g_timer_list)) {
570 g_cur_timer =
571 container_of(g_timer_list.next, struct oz_timer, link);
572 if (g_timer_state == OZ_TIMER_SET) {
573 oz_event_log(OZ_EVT_TIMER_CTRL, 3,
574 (u16)g_cur_timer->type, 0,
575 (unsigned)g_cur_timer->due_time);
576 mod_timer(&g_timer, g_cur_timer->due_time);
577 } else {
578 oz_event_log(OZ_EVT_TIMER_CTRL, 4,
579 (u16)g_cur_timer->type, 0,
580 (unsigned)g_cur_timer->due_time);
581 g_timer.expires = g_cur_timer->due_time;
582 g_timer.function = oz_protocol_timer;
583 g_timer.data = 0;
584 add_timer(&g_timer);
585 }
586 g_timer_state = OZ_TIMER_SET;
587 } else {
588 oz_trace("No queued timers\n");
589 }
590 spin_unlock_bh(&g_polling_lock);
591 }
592 /*------------------------------------------------------------------------------
593 * Context: softirq or process
594 */
595 void oz_timer_add(struct oz_pd *pd, int type, unsigned long due_time,
596 int remove)
597 {
598 struct list_head *e;
599 struct oz_timer *t = 0;
600 int restart_needed = 0;
601 oz_event_log(OZ_EVT_TIMER_CTRL, 1, (u16)type, 0, (unsigned)due_time);
602 spin_lock(&g_polling_lock);
603 if (remove) {
604 list_for_each(e, &g_timer_list) {
605 t = container_of(e, struct oz_timer, link);
606 if ((t->pd == pd) && (t->type == type)) {
607 if (g_cur_timer == t) {
608 restart_needed = 1;
609 g_cur_timer = 0;
610 }
611 list_del(e);
612 break;
613 }
614 t = 0;
615 }
616 }
617 if (!t) {
618 if (g_timer_pool) {
619 t = container_of(g_timer_pool, struct oz_timer, link);
620 g_timer_pool = g_timer_pool->next;
621 g_timer_pool_count--;
622 } else {
623 t = kmalloc(sizeof(struct oz_timer), GFP_ATOMIC);
624 }
625 if (t) {
626 t->pd = pd;
627 t->type = type;
628 oz_pd_get(pd);
629 }
630 }
631 if (t) {
632 struct oz_timer *t2;
633 t->due_time = due_time;
634 list_for_each(e, &g_timer_list) {
635 t2 = container_of(e, struct oz_timer, link);
636 if (time_before(due_time, t2->due_time)) {
637 if (t2 == g_cur_timer) {
638 g_cur_timer = 0;
639 restart_needed = 1;
640 }
641 break;
642 }
643 }
644 list_add_tail(&t->link, e);
645 }
646 if (g_timer_state == OZ_TIMER_IDLE)
647 restart_needed = 1;
648 else if (g_timer_state == OZ_TIMER_IN_HANDLER)
649 restart_needed = 0;
650 spin_unlock(&g_polling_lock);
651 if (restart_needed)
652 oz_protocol_timer_start();
653 }
654 /*------------------------------------------------------------------------------
655 * Context: softirq or process
656 */
657 void oz_timer_delete(struct oz_pd *pd, int type)
658 {
659 struct list_head *chain = 0;
660 struct oz_timer *t;
661 struct oz_timer *n;
662 int restart_needed = 0;
663 int release = 0;
664 oz_event_log(OZ_EVT_TIMER_CTRL, 2, (u16)type, 0, 0);
665 spin_lock(&g_polling_lock);
666 list_for_each_entry_safe(t, n, &g_timer_list, link) {
667 if ((t->pd == pd) && ((type == 0) || (t->type == type))) {
668 if (g_cur_timer == t) {
669 restart_needed = 1;
670 g_cur_timer = 0;
671 del_timer(&g_timer);
672 }
673 list_del(&t->link);
674 release++;
675 if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) {
676 t->link.next = g_timer_pool;
677 g_timer_pool = &t->link;
678 g_timer_pool_count++;
679 } else {
680 t->link.next = chain;
681 chain = &t->link;
682 }
683 if (type)
684 break;
685 }
686 }
687 if (g_timer_state == OZ_TIMER_IN_HANDLER)
688 restart_needed = 0;
689 else if (restart_needed)
690 g_timer_state = OZ_TIMER_IDLE;
691 spin_unlock(&g_polling_lock);
692 if (restart_needed)
693 oz_protocol_timer_start();
694 while (release--)
695 oz_pd_put(pd);
696 while (chain) {
697 t = container_of(chain, struct oz_timer, link);
698 chain = chain->next;
699 kfree(t);
700 }
701 }
702 /*------------------------------------------------------------------------------
703 * Context: softirq or process
704 */
705 void oz_pd_request_heartbeat(struct oz_pd *pd)
706 {
707 unsigned long now = jiffies;
708 unsigned long t;
709 spin_lock(&g_polling_lock);
710 if (pd->heartbeat_requested) {
711 spin_unlock(&g_polling_lock);
712 return;
713 }
714 if (pd->pulse_period_j)
715 t = ((now / pd->pulse_period_j) + 1) * pd->pulse_period_j;
716 else
717 t = now + 1;
718 pd->heartbeat_requested = 1;
719 spin_unlock(&g_polling_lock);
720 oz_timer_add(pd, OZ_TIMER_HEARTBEAT, t, 0);
721 }
722 /*------------------------------------------------------------------------------
723 * Context: softirq or process
724 */
725 struct oz_pd *oz_pd_find(u8 *mac_addr)
726 {
727 struct oz_pd *pd;
728 struct list_head *e;
729 spin_lock_bh(&g_polling_lock);
730 list_for_each(e, &g_pd_list) {
731 pd = container_of(e, struct oz_pd, link);
732 if (memcmp(pd->mac_addr, mac_addr, ETH_ALEN) == 0) {
733 atomic_inc(&pd->ref_count);
734 spin_unlock_bh(&g_polling_lock);
735 return pd;
736 }
737 }
738 spin_unlock_bh(&g_polling_lock);
739 return 0;
740 }
741 /*------------------------------------------------------------------------------
742 * Context: process
743 */
744 void oz_app_enable(int app_id, int enable)
745 {
746 if (app_id <= OZ_APPID_MAX) {
747 spin_lock_bh(&g_polling_lock);
748 if (enable)
749 g_apps |= (1<<app_id);
750 else
751 g_apps &= ~(1<<app_id);
752 spin_unlock_bh(&g_polling_lock);
753 }
754 }
755 /*------------------------------------------------------------------------------
756 * Context: softirq
757 */
758 static int oz_pkt_recv(struct sk_buff *skb, struct net_device *dev,
759 struct packet_type *pt, struct net_device *orig_dev)
760 {
761 oz_event_log(OZ_EVT_RX_FRAME, 0, 0, 0, 0);
762 skb = skb_share_check(skb, GFP_ATOMIC);
763 if (skb == 0)
764 return 0;
765 spin_lock_bh(&g_rx_queue.lock);
766 if (g_processing_rx) {
767 /* We already hold the lock so use __ variant.
768 */
769 __skb_queue_head(&g_rx_queue, skb);
770 spin_unlock_bh(&g_rx_queue.lock);
771 } else {
772 g_processing_rx = 1;
773 do {
774
775 spin_unlock_bh(&g_rx_queue.lock);
776 oz_rx_frame(skb);
777 spin_lock_bh(&g_rx_queue.lock);
778 if (skb_queue_empty(&g_rx_queue)) {
779 g_processing_rx = 0;
780 spin_unlock_bh(&g_rx_queue.lock);
781 break;
782 }
783 /* We already hold the lock so use __ variant.
784 */
785 skb = __skb_dequeue(&g_rx_queue);
786 } while (1);
787 }
788 return 0;
789 }
790 /*------------------------------------------------------------------------------
791 * Context: process
792 */
793 void oz_binding_add(char *net_dev)
794 {
795 struct oz_binding *binding;
796
797 binding = kmalloc(sizeof(struct oz_binding), GFP_KERNEL);
798 if (binding) {
799 binding->ptype.type = __constant_htons(OZ_ETHERTYPE);
800 binding->ptype.func = oz_pkt_recv;
801 memcpy(binding->name, net_dev, OZ_MAX_BINDING_LEN);
802 if (net_dev && *net_dev) {
803 oz_trace("Adding binding: %s\n", net_dev);
804 binding->ptype.dev =
805 dev_get_by_name(&init_net, net_dev);
806 if (binding->ptype.dev == 0) {
807 oz_trace("Netdev %s not found\n", net_dev);
808 kfree(binding);
809 binding = 0;
810 }
811 } else {
812 oz_trace("Binding to all netcards\n");
813 binding->ptype.dev = 0;
814 }
815 if (binding) {
816 dev_add_pack(&binding->ptype);
817 spin_lock_bh(&g_binding_lock);
818 binding->next = g_binding;
819 g_binding = binding;
820 spin_unlock_bh(&g_binding_lock);
821 }
822 }
823 }
824 /*------------------------------------------------------------------------------
825 * Context: process
826 */
827 static int compare_binding_name(char *s1, char *s2)
828 {
829 int i;
830 for (i = 0; i < OZ_MAX_BINDING_LEN; i++) {
831 if (*s1 != *s2)
832 return 0;
833 if (!*s1++)
834 return 1;
835 s2++;
836 }
837 return 1;
838 }
839 /*------------------------------------------------------------------------------
840 * Context: process
841 */
842 static void pd_stop_all_for_device(struct net_device *net_dev)
843 {
844 struct list_head h;
845 struct oz_pd *pd;
846 struct oz_pd *n;
847 INIT_LIST_HEAD(&h);
848 spin_lock_bh(&g_polling_lock);
849 list_for_each_entry_safe(pd, n, &g_pd_list, link) {
850 if (pd->net_dev == net_dev) {
851 list_move(&pd->link, &h);
852 oz_pd_get(pd);
853 }
854 }
855 spin_unlock_bh(&g_polling_lock);
856 while (!list_empty(&h)) {
857 pd = list_first_entry(&h, struct oz_pd, link);
858 oz_pd_stop(pd);
859 oz_pd_put(pd);
860 }
861 }
862 /*------------------------------------------------------------------------------
863 * Context: process
864 */
865 void oz_binding_remove(char *net_dev)
866 {
867 struct oz_binding *binding = 0;
868 struct oz_binding **link;
869 oz_trace("Removing binding: %s\n", net_dev);
870 spin_lock_bh(&g_binding_lock);
871 binding = g_binding;
872 link = &g_binding;
873 while (binding) {
874 if (compare_binding_name(binding->name, net_dev)) {
875 oz_trace("Binding '%s' found\n", net_dev);
876 *link = binding->next;
877 break;
878 } else {
879 link = &binding;
880 binding = binding->next;
881 }
882 }
883 spin_unlock_bh(&g_binding_lock);
884 if (binding) {
885 dev_remove_pack(&binding->ptype);
886 if (binding->ptype.dev) {
887 dev_put(binding->ptype.dev);
888 pd_stop_all_for_device(binding->ptype.dev);
889 }
890 kfree(binding);
891 }
892 }
893 /*------------------------------------------------------------------------------
894 * Context: process
895 */
896 static char *oz_get_next_device_name(char *s, char *dname, int max_size)
897 {
898 while (*s == ',')
899 s++;
900 while (*s && (*s != ',') && max_size > 1) {
901 *dname++ = *s++;
902 max_size--;
903 }
904 *dname = 0;
905 return s;
906 }
907 /*------------------------------------------------------------------------------
908 * Context: process
909 */
910 int oz_protocol_init(char *devs)
911 {
912 skb_queue_head_init(&g_rx_queue);
913 if (devs && (devs[0] == '*')) {
914 oz_binding_add(0);
915 } else {
916 char d[32];
917 while (*devs) {
918 devs = oz_get_next_device_name(devs, d, sizeof(d));
919 if (d[0])
920 oz_binding_add(d);
921 }
922 }
923 init_timer(&g_timer);
924 return 0;
925 }
926 /*------------------------------------------------------------------------------
927 * Context: process
928 */
929 int oz_get_pd_list(struct oz_mac_addr *addr, int max_count)
930 {
931 struct oz_pd *pd;
932 struct list_head *e;
933 int count = 0;
934 spin_lock_bh(&g_polling_lock);
935 list_for_each(e, &g_pd_list) {
936 if (count >= max_count)
937 break;
938 pd = container_of(e, struct oz_pd, link);
939 memcpy(&addr[count++], pd->mac_addr, ETH_ALEN);
940 }
941 spin_unlock_bh(&g_polling_lock);
942 return count;
943 }
944 /*------------------------------------------------------------------------------
945 */
946 void oz_polling_lock_bh(void)
947 {
948 spin_lock_bh(&g_polling_lock);
949 }
950 /*------------------------------------------------------------------------------
951 */
952 void oz_polling_unlock_bh(void)
953 {
954 spin_unlock_bh(&g_polling_lock);
955 }
kernel source for telekom puls (alcatel/mediatek)