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bc3157dd CK |
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 "ozconfig.h" | |
13 | #include "ozprotocol.h" | |
14 | #include "ozeltbuf.h" | |
15 | #include "ozpd.h" | |
16 | #include "ozproto.h" | |
17 | #include "oztrace.h" | |
bc3157dd CK |
18 | #include "ozevent.h" |
19 | #include "ozcdev.h" | |
20 | #include "ozusbsvc.h" | |
21 | #include <asm/unaligned.h> | |
22 | #include <linux/uaccess.h> | |
23 | #include <net/psnap.h> | |
24 | /*------------------------------------------------------------------------------ | |
25 | */ | |
26 | #define OZ_MAX_TX_POOL_SIZE 6 | |
bc3157dd CK |
27 | /*------------------------------------------------------------------------------ |
28 | */ | |
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); | |
33e6ada1 | 31 | static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f); |
bc3157dd CK |
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); | |
33e6ada1 | 36 | static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data); |
bc3157dd CK |
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. | |
45 | */ | |
46 | static atomic_t g_submitted_isoc = ATOMIC_INIT(0); | |
47 | /* Application handler functions. | |
48 | */ | |
49 | static struct oz_app_if g_app_if[OZ_APPID_MAX] = { | |
50 | {oz_usb_init, | |
51 | oz_usb_term, | |
52 | oz_usb_start, | |
53 | oz_usb_stop, | |
54 | oz_usb_rx, | |
55 | oz_usb_heartbeat, | |
56 | oz_usb_farewell, | |
57 | OZ_APPID_USB}, | |
58 | ||
59 | {oz_def_app_init, | |
60 | oz_def_app_term, | |
61 | oz_def_app_start, | |
62 | oz_def_app_stop, | |
63 | oz_def_app_rx, | |
64 | 0, | |
65 | 0, | |
66 | OZ_APPID_UNUSED1}, | |
67 | ||
68 | {oz_def_app_init, | |
69 | oz_def_app_term, | |
70 | oz_def_app_start, | |
71 | oz_def_app_stop, | |
72 | oz_def_app_rx, | |
73 | 0, | |
74 | 0, | |
75 | OZ_APPID_UNUSED2}, | |
76 | ||
77 | {oz_cdev_init, | |
78 | oz_cdev_term, | |
79 | oz_cdev_start, | |
80 | oz_cdev_stop, | |
81 | oz_cdev_rx, | |
82 | 0, | |
83 | 0, | |
84 | OZ_APPID_SERIAL}, | |
85 | }; | |
86 | /*------------------------------------------------------------------------------ | |
87 | * Context: process | |
88 | */ | |
89 | static int oz_def_app_init(void) | |
90 | { | |
91 | return 0; | |
92 | } | |
93 | /*------------------------------------------------------------------------------ | |
94 | * Context: process | |
95 | */ | |
96 | static void oz_def_app_term(void) | |
97 | { | |
98 | } | |
99 | /*------------------------------------------------------------------------------ | |
100 | * Context: softirq | |
101 | */ | |
102 | static int oz_def_app_start(struct oz_pd *pd, int resume) | |
103 | { | |
104 | return 0; | |
105 | } | |
106 | /*------------------------------------------------------------------------------ | |
107 | * Context: softirq | |
108 | */ | |
109 | static void oz_def_app_stop(struct oz_pd *pd, int pause) | |
110 | { | |
111 | } | |
112 | /*------------------------------------------------------------------------------ | |
113 | * Context: softirq | |
114 | */ | |
115 | static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt) | |
116 | { | |
117 | } | |
118 | /*------------------------------------------------------------------------------ | |
119 | * Context: softirq or process | |
120 | */ | |
121 | void oz_pd_set_state(struct oz_pd *pd, unsigned state) | |
122 | { | |
123 | pd->state = state; | |
124 | oz_event_log(OZ_EVT_PD_STATE, 0, 0, 0, state); | |
125 | #ifdef WANT_TRACE | |
126 | switch (state) { | |
127 | case OZ_PD_S_IDLE: | |
128 | oz_trace("PD State: OZ_PD_S_IDLE\n"); | |
129 | break; | |
130 | case OZ_PD_S_CONNECTED: | |
131 | oz_trace("PD State: OZ_PD_S_CONNECTED\n"); | |
132 | break; | |
133 | case OZ_PD_S_STOPPED: | |
134 | oz_trace("PD State: OZ_PD_S_STOPPED\n"); | |
135 | break; | |
136 | case OZ_PD_S_SLEEP: | |
137 | oz_trace("PD State: OZ_PD_S_SLEEP\n"); | |
138 | break; | |
139 | } | |
140 | #endif /* WANT_TRACE */ | |
141 | } | |
142 | /*------------------------------------------------------------------------------ | |
143 | * Context: softirq or process | |
144 | */ | |
145 | void oz_pd_get(struct oz_pd *pd) | |
146 | { | |
147 | atomic_inc(&pd->ref_count); | |
148 | } | |
149 | /*------------------------------------------------------------------------------ | |
150 | * Context: softirq or process | |
151 | */ | |
152 | void oz_pd_put(struct oz_pd *pd) | |
153 | { | |
154 | if (atomic_dec_and_test(&pd->ref_count)) | |
155 | oz_pd_destroy(pd); | |
156 | } | |
157 | /*------------------------------------------------------------------------------ | |
158 | * Context: softirq-serialized | |
159 | */ | |
160 | struct oz_pd *oz_pd_alloc(u8 *mac_addr) | |
161 | { | |
1ec41a31 | 162 | struct oz_pd *pd = kzalloc(sizeof(struct oz_pd), GFP_ATOMIC); |
bc3157dd CK |
163 | if (pd) { |
164 | int i; | |
bc3157dd CK |
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)) { | |
1ec41a31 | 173 | kfree(pd); |
bc3157dd CK |
174 | pd = 0; |
175 | } | |
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); | |
182 | } | |
183 | return pd; | |
184 | } | |
185 | /*------------------------------------------------------------------------------ | |
186 | * Context: softirq or process | |
187 | */ | |
188 | void oz_pd_destroy(struct oz_pd *pd) | |
189 | { | |
190 | struct list_head *e; | |
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. | |
196 | */ | |
197 | e = pd->stream_list.next; | |
198 | while (e != &pd->stream_list) { | |
199 | st = container_of(e, struct oz_isoc_stream, link); | |
200 | e = e->next; | |
201 | oz_isoc_stream_free(st); | |
202 | } | |
203 | /* Free any queued tx frames. | |
204 | */ | |
205 | e = pd->tx_queue.next; | |
206 | while (e != &pd->tx_queue) { | |
207 | f = container_of(e, struct oz_tx_frame, link); | |
208 | e = e->next; | |
33e6ada1 RG |
209 | if (f->skb != NULL) |
210 | kfree_skb(f->skb); | |
bc3157dd CK |
211 | oz_retire_frame(pd, f); |
212 | } | |
213 | oz_elt_buf_term(&pd->elt_buff); | |
214 | /* Free any farewells. | |
215 | */ | |
216 | e = pd->farewell_list.next; | |
217 | while (e != &pd->farewell_list) { | |
218 | fwell = container_of(e, struct oz_farewell, link); | |
219 | e = e->next; | |
1ec41a31 | 220 | kfree(fwell); |
bc3157dd CK |
221 | } |
222 | /* Deallocate all frames in tx pool. | |
223 | */ | |
224 | while (pd->tx_pool) { | |
225 | e = pd->tx_pool; | |
226 | pd->tx_pool = e->next; | |
1ec41a31 | 227 | kfree(container_of(e, struct oz_tx_frame, link)); |
bc3157dd CK |
228 | } |
229 | if (pd->net_dev) | |
230 | dev_put(pd->net_dev); | |
1ec41a31 | 231 | kfree(pd); |
bc3157dd CK |
232 | } |
233 | /*------------------------------------------------------------------------------ | |
234 | * Context: softirq-serialized | |
235 | */ | |
236 | int oz_services_start(struct oz_pd *pd, u16 apps, int resume) | |
237 | { | |
238 | struct oz_app_if *ai; | |
239 | int rc = 0; | |
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)) { | |
244 | rc = -1; | |
245 | oz_trace("Unabled to start service %d\n", | |
246 | ai->app_id); | |
247 | break; | |
248 | } | |
249 | oz_polling_lock_bh(); | |
250 | pd->total_apps |= (1<<ai->app_id); | |
251 | if (resume) | |
252 | pd->paused_apps &= ~(1<<ai->app_id); | |
253 | oz_polling_unlock_bh(); | |
254 | } | |
255 | } | |
256 | return rc; | |
257 | } | |
258 | /*------------------------------------------------------------------------------ | |
259 | * Context: softirq or process | |
260 | */ | |
261 | void oz_services_stop(struct oz_pd *pd, u16 apps, int pause) | |
262 | { | |
263 | 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(); | |
268 | if (pause) { | |
269 | pd->paused_apps |= (1<<ai->app_id); | |
270 | } else { | |
271 | pd->total_apps &= ~(1<<ai->app_id); | |
272 | pd->paused_apps &= ~(1<<ai->app_id); | |
273 | } | |
274 | oz_polling_unlock_bh(); | |
275 | ai->stop(pd, pause); | |
276 | } | |
277 | } | |
278 | } | |
279 | /*------------------------------------------------------------------------------ | |
280 | * Context: softirq | |
281 | */ | |
282 | void oz_pd_heartbeat(struct oz_pd *pd, u16 apps) | |
283 | { | |
284 | struct oz_app_if *ai; | |
285 | int more = 0; | |
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)) | |
289 | more = 1; | |
290 | } | |
291 | } | |
292 | if (more) | |
293 | oz_pd_request_heartbeat(pd); | |
294 | if (pd->mode & OZ_F_ISOC_ANYTIME) { | |
295 | int count = 8; | |
296 | while (count-- && (oz_send_isoc_frame(pd) >= 0)) | |
297 | ; | |
298 | } | |
299 | } | |
300 | /*------------------------------------------------------------------------------ | |
301 | * Context: softirq or process | |
302 | */ | |
303 | void oz_pd_stop(struct oz_pd *pd) | |
304 | { | |
305 | u16 stop_apps = 0; | |
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; | |
310 | pd->total_apps = 0; | |
311 | pd->paused_apps = 0; | |
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.*/ | |
317 | list_del(&pd->link); | |
318 | oz_polling_unlock_bh(); | |
319 | oz_trace("pd ref count = %d\n", atomic_read(&pd->ref_count)); | |
320 | oz_timer_delete(pd, 0); | |
321 | oz_pd_put(pd); | |
322 | } | |
323 | /*------------------------------------------------------------------------------ | |
324 | * Context: softirq | |
325 | */ | |
326 | int oz_pd_sleep(struct oz_pd *pd) | |
327 | { | |
328 | int do_stop = 0; | |
329 | u16 stop_apps = 0; | |
330 | oz_polling_lock_bh(); | |
331 | if (pd->state & (OZ_PD_S_SLEEP | OZ_PD_S_STOPPED)) { | |
332 | oz_polling_unlock_bh(); | |
333 | return 0; | |
334 | } | |
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); | |
340 | } else { | |
341 | do_stop = 1; | |
342 | } | |
343 | stop_apps = pd->total_apps; | |
344 | oz_polling_unlock_bh(); | |
345 | if (do_stop) { | |
346 | oz_pd_stop(pd); | |
347 | } else { | |
348 | oz_services_stop(pd, stop_apps, 1); | |
349 | oz_timer_add(pd, OZ_TIMER_STOP, jiffies + pd->keep_alive_j, 1); | |
350 | } | |
351 | return do_stop; | |
352 | } | |
353 | /*------------------------------------------------------------------------------ | |
354 | * Context: softirq | |
355 | */ | |
356 | static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd) | |
357 | { | |
358 | struct oz_tx_frame *f = 0; | |
359 | spin_lock_bh(&pd->tx_frame_lock); | |
360 | if (pd->tx_pool) { | |
361 | f = container_of(pd->tx_pool, struct oz_tx_frame, link); | |
362 | pd->tx_pool = pd->tx_pool->next; | |
363 | pd->tx_pool_count--; | |
364 | } | |
365 | spin_unlock_bh(&pd->tx_frame_lock); | |
366 | if (f == 0) | |
1ec41a31 | 367 | f = kmalloc(sizeof(struct oz_tx_frame), GFP_ATOMIC); |
bc3157dd CK |
368 | if (f) { |
369 | f->total_size = sizeof(struct oz_hdr); | |
370 | INIT_LIST_HEAD(&f->link); | |
371 | INIT_LIST_HEAD(&f->elt_list); | |
372 | } | |
373 | return f; | |
374 | } | |
33e6ada1 RG |
375 | /*------------------------------------------------------------------------------ |
376 | * Context: softirq or process | |
377 | */ | |
378 | static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f) | |
379 | { | |
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; | |
385 | pd->tx_pool_count++; | |
386 | } else { | |
387 | kfree(f); | |
388 | } | |
389 | oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing ISOC Frame isoc_nb= %d\n", | |
390 | pd->nb_queued_isoc_frames); | |
391 | } | |
bc3157dd CK |
392 | /*------------------------------------------------------------------------------ |
393 | * Context: softirq or process | |
394 | */ | |
395 | static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f) | |
396 | { | |
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; | |
401 | pd->tx_pool_count++; | |
402 | f = 0; | |
bc3157dd CK |
403 | } |
404 | spin_unlock_bh(&pd->tx_frame_lock); | |
405 | if (f) | |
1ec41a31 | 406 | kfree(f); |
bc3157dd | 407 | } |
33e6ada1 RG |
408 | /*------------------------------------------------------------------------------ |
409 | * Context: softirq-serialized | |
410 | */ | |
411 | void oz_set_more_bit(struct sk_buff *skb) | |
412 | { | |
413 | struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb); | |
414 | oz_hdr->control |= OZ_F_MORE_DATA; | |
415 | } | |
00ec12b8 RG |
416 | /*------------------------------------------------------------------------------ |
417 | * Context: softirq-serialized | |
418 | */ | |
419 | void oz_set_last_pkt_nb(struct oz_pd *pd, struct sk_buff *skb) | |
420 | { | |
421 | struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb); | |
422 | oz_hdr->last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
423 | } | |
bc3157dd CK |
424 | /*------------------------------------------------------------------------------ |
425 | * Context: softirq | |
426 | */ | |
427 | int oz_prepare_frame(struct oz_pd *pd, int empty) | |
428 | { | |
429 | struct oz_tx_frame *f; | |
430 | if ((pd->mode & OZ_MODE_MASK) != OZ_MODE_TRIGGERED) | |
431 | return -1; | |
432 | if (pd->nb_queued_frames >= OZ_MAX_QUEUED_FRAMES) | |
433 | return -1; | |
434 | if (!empty && !oz_are_elts_available(&pd->elt_buff)) | |
435 | return -1; | |
436 | f = oz_tx_frame_alloc(pd); | |
437 | if (f == 0) | |
438 | return -1; | |
33e6ada1 | 439 | f->skb = NULL; |
bc3157dd CK |
440 | f->hdr.control = |
441 | (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ACK_REQUESTED; | |
442 | ++pd->last_tx_pkt_num; | |
443 | put_unaligned(cpu_to_le32(pd->last_tx_pkt_num), &f->hdr.pkt_num); | |
444 | if (empty == 0) { | |
445 | oz_select_elts_for_tx(&pd->elt_buff, 0, &f->total_size, | |
446 | pd->max_tx_size, &f->elt_list); | |
447 | } | |
448 | spin_lock(&pd->tx_frame_lock); | |
449 | list_add_tail(&f->link, &pd->tx_queue); | |
450 | pd->nb_queued_frames++; | |
451 | spin_unlock(&pd->tx_frame_lock); | |
452 | return 0; | |
453 | } | |
454 | /*------------------------------------------------------------------------------ | |
455 | * Context: softirq-serialized | |
456 | */ | |
457 | static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f) | |
458 | { | |
459 | struct sk_buff *skb = 0; | |
460 | struct net_device *dev = pd->net_dev; | |
461 | struct oz_hdr *oz_hdr; | |
462 | struct oz_elt *elt; | |
463 | struct list_head *e; | |
464 | /* Allocate skb with enough space for the lower layers as well | |
465 | * as the space we need. | |
466 | */ | |
467 | skb = alloc_skb(f->total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC); | |
468 | if (skb == 0) | |
469 | return 0; | |
470 | /* Reserve the head room for lower layers. | |
471 | */ | |
472 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
473 | skb_reset_network_header(skb); | |
474 | skb->dev = dev; | |
475 | skb->protocol = htons(OZ_ETHERTYPE); | |
476 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
477 | dev->dev_addr, skb->len) < 0) | |
478 | goto fail; | |
479 | /* Push the tail to the end of the area we are going to copy to. | |
480 | */ | |
481 | oz_hdr = (struct oz_hdr *)skb_put(skb, f->total_size); | |
482 | f->hdr.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
483 | memcpy(oz_hdr, &f->hdr, sizeof(struct oz_hdr)); | |
484 | /* Copy the elements into the frame body. | |
485 | */ | |
486 | elt = (struct oz_elt *)(oz_hdr+1); | |
487 | for (e = f->elt_list.next; e != &f->elt_list; e = e->next) { | |
488 | struct oz_elt_info *ei; | |
489 | ei = container_of(e, struct oz_elt_info, link); | |
490 | memcpy(elt, ei->data, ei->length); | |
491 | elt = oz_next_elt(elt); | |
492 | } | |
493 | return skb; | |
494 | fail: | |
495 | kfree_skb(skb); | |
496 | return 0; | |
497 | } | |
498 | /*------------------------------------------------------------------------------ | |
499 | * Context: softirq or process | |
500 | */ | |
501 | static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f) | |
502 | { | |
503 | struct list_head *e; | |
504 | struct oz_elt_info *ei; | |
505 | e = f->elt_list.next; | |
506 | while (e != &f->elt_list) { | |
507 | ei = container_of(e, struct oz_elt_info, link); | |
508 | e = e->next; | |
509 | list_del_init(&ei->link); | |
510 | if (ei->callback) | |
511 | ei->callback(pd, ei->context); | |
512 | spin_lock_bh(&pd->elt_buff.lock); | |
513 | oz_elt_info_free(&pd->elt_buff, ei); | |
514 | spin_unlock_bh(&pd->elt_buff.lock); | |
515 | } | |
516 | oz_tx_frame_free(pd, f); | |
517 | if (pd->elt_buff.free_elts > pd->elt_buff.max_free_elts) | |
518 | oz_trim_elt_pool(&pd->elt_buff); | |
519 | } | |
520 | /*------------------------------------------------------------------------------ | |
521 | * Context: softirq-serialized | |
522 | */ | |
33e6ada1 | 523 | static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data) |
bc3157dd CK |
524 | { |
525 | struct sk_buff *skb; | |
526 | struct oz_tx_frame *f; | |
527 | struct list_head *e; | |
bc3157dd CK |
528 | spin_lock(&pd->tx_frame_lock); |
529 | e = pd->last_sent_frame->next; | |
530 | if (e == &pd->tx_queue) { | |
531 | spin_unlock(&pd->tx_frame_lock); | |
532 | return -1; | |
533 | } | |
bc3157dd | 534 | f = container_of(e, struct oz_tx_frame, link); |
33e6ada1 RG |
535 | |
536 | if (f->skb != NULL) { | |
537 | skb = f->skb; | |
538 | oz_tx_isoc_free(pd, f); | |
539 | spin_unlock(&pd->tx_frame_lock); | |
540 | if (more_data) | |
541 | oz_set_more_bit(skb); | |
00ec12b8 | 542 | oz_set_last_pkt_nb(pd, skb); |
33e6ada1 RG |
543 | if ((int)atomic_read(&g_submitted_isoc) < |
544 | OZ_MAX_SUBMITTED_ISOC) { | |
545 | if (dev_queue_xmit(skb) < 0) { | |
546 | oz_trace2(OZ_TRACE_TX_FRAMES, | |
547 | "Dropping ISOC Frame\n"); | |
548 | oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
549 | return -1; | |
550 | } | |
551 | atomic_inc(&g_submitted_isoc); | |
552 | oz_trace2(OZ_TRACE_TX_FRAMES, | |
553 | "Sending ISOC Frame, nb_isoc= %d\n", | |
554 | pd->nb_queued_isoc_frames); | |
555 | return 0; | |
556 | } else { | |
557 | kfree_skb(skb); | |
558 | oz_trace2(OZ_TRACE_TX_FRAMES, "Dropping ISOC Frame>\n"); | |
559 | oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
560 | return -1; | |
561 | } | |
562 | } | |
563 | ||
564 | pd->last_sent_frame = e; | |
bc3157dd CK |
565 | skb = oz_build_frame(pd, f); |
566 | spin_unlock(&pd->tx_frame_lock); | |
33e6ada1 RG |
567 | if (more_data) |
568 | oz_set_more_bit(skb); | |
bc3157dd CK |
569 | oz_trace2(OZ_TRACE_TX_FRAMES, "TX frame PN=0x%x\n", f->hdr.pkt_num); |
570 | if (skb) { | |
571 | oz_event_log(OZ_EVT_TX_FRAME, | |
572 | 0, | |
573 | (((u16)f->hdr.control)<<8)|f->hdr.last_pkt_num, | |
574 | 0, f->hdr.pkt_num); | |
575 | if (dev_queue_xmit(skb) < 0) | |
576 | return -1; | |
33e6ada1 | 577 | |
bc3157dd CK |
578 | } |
579 | return 0; | |
580 | } | |
581 | /*------------------------------------------------------------------------------ | |
582 | * Context: softirq-serialized | |
583 | */ | |
584 | void oz_send_queued_frames(struct oz_pd *pd, int backlog) | |
585 | { | |
33e6ada1 RG |
586 | while (oz_prepare_frame(pd, 0) >= 0) |
587 | backlog++; | |
588 | ||
589 | switch (pd->mode & (OZ_F_ISOC_NO_ELTS | OZ_F_ISOC_ANYTIME)) { | |
590 | ||
591 | case OZ_F_ISOC_NO_ELTS: { | |
592 | backlog += pd->nb_queued_isoc_frames; | |
593 | if (backlog <= 0) | |
594 | goto out; | |
595 | if (backlog > OZ_MAX_SUBMITTED_ISOC) | |
596 | backlog = OZ_MAX_SUBMITTED_ISOC; | |
597 | break; | |
bc3157dd | 598 | } |
33e6ada1 RG |
599 | case OZ_NO_ELTS_ANYTIME: { |
600 | if ((backlog <= 0) && (pd->isoc_sent == 0)) | |
601 | goto out; | |
602 | break; | |
603 | } | |
604 | default: { | |
605 | if (backlog <= 0) | |
606 | goto out; | |
607 | break; | |
608 | } | |
609 | } | |
610 | while (backlog--) { | |
611 | if (oz_send_next_queued_frame(pd, backlog) < 0) | |
612 | break; | |
bc3157dd | 613 | } |
33e6ada1 RG |
614 | return; |
615 | ||
616 | out: oz_prepare_frame(pd, 1); | |
617 | oz_send_next_queued_frame(pd, 0); | |
bc3157dd CK |
618 | } |
619 | /*------------------------------------------------------------------------------ | |
620 | * Context: softirq | |
621 | */ | |
622 | static int oz_send_isoc_frame(struct oz_pd *pd) | |
623 | { | |
624 | struct sk_buff *skb = 0; | |
625 | struct net_device *dev = pd->net_dev; | |
626 | struct oz_hdr *oz_hdr; | |
627 | struct oz_elt *elt; | |
628 | struct list_head *e; | |
629 | struct list_head list; | |
630 | int total_size = sizeof(struct oz_hdr); | |
631 | INIT_LIST_HEAD(&list); | |
632 | ||
633 | oz_select_elts_for_tx(&pd->elt_buff, 1, &total_size, | |
634 | pd->max_tx_size, &list); | |
635 | if (list.next == &list) | |
636 | return 0; | |
637 | skb = alloc_skb(total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC); | |
638 | if (skb == 0) { | |
639 | oz_trace("Cannot alloc skb\n"); | |
640 | oz_elt_info_free_chain(&pd->elt_buff, &list); | |
641 | return -1; | |
642 | } | |
643 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
644 | skb_reset_network_header(skb); | |
645 | skb->dev = dev; | |
646 | skb->protocol = htons(OZ_ETHERTYPE); | |
647 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
648 | dev->dev_addr, skb->len) < 0) { | |
649 | kfree_skb(skb); | |
650 | return -1; | |
651 | } | |
652 | oz_hdr = (struct oz_hdr *)skb_put(skb, total_size); | |
653 | oz_hdr->control = (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC; | |
654 | oz_hdr->last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
655 | elt = (struct oz_elt *)(oz_hdr+1); | |
656 | ||
657 | for (e = list.next; e != &list; e = e->next) { | |
658 | struct oz_elt_info *ei; | |
659 | ei = container_of(e, struct oz_elt_info, link); | |
660 | memcpy(elt, ei->data, ei->length); | |
661 | elt = oz_next_elt(elt); | |
662 | } | |
663 | oz_event_log(OZ_EVT_TX_ISOC, 0, 0, 0, 0); | |
664 | dev_queue_xmit(skb); | |
665 | oz_elt_info_free_chain(&pd->elt_buff, &list); | |
666 | return 0; | |
667 | } | |
668 | /*------------------------------------------------------------------------------ | |
669 | * Context: softirq-serialized | |
670 | */ | |
671 | void oz_retire_tx_frames(struct oz_pd *pd, u8 lpn) | |
672 | { | |
673 | struct list_head *e; | |
674 | struct oz_tx_frame *f; | |
675 | struct list_head *first = 0; | |
676 | struct list_head *last = 0; | |
677 | u8 diff; | |
678 | u32 pkt_num; | |
679 | ||
680 | spin_lock(&pd->tx_frame_lock); | |
681 | e = pd->tx_queue.next; | |
682 | while (e != &pd->tx_queue) { | |
683 | f = container_of(e, struct oz_tx_frame, link); | |
684 | pkt_num = le32_to_cpu(get_unaligned(&f->hdr.pkt_num)); | |
685 | diff = (lpn - (pkt_num & OZ_LAST_PN_MASK)) & OZ_LAST_PN_MASK; | |
33e6ada1 | 686 | if ((diff > OZ_LAST_PN_HALF_CYCLE) || (pkt_num == 0)) |
bc3157dd | 687 | break; |
33e6ada1 RG |
688 | oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing pkt_num= %u, nb= %d\n", |
689 | pkt_num, pd->nb_queued_frames); | |
bc3157dd CK |
690 | if (first == 0) |
691 | first = e; | |
692 | last = e; | |
693 | e = e->next; | |
694 | pd->nb_queued_frames--; | |
695 | } | |
696 | if (first) { | |
697 | last->next->prev = &pd->tx_queue; | |
698 | pd->tx_queue.next = last->next; | |
699 | last->next = 0; | |
700 | } | |
701 | pd->last_sent_frame = &pd->tx_queue; | |
702 | spin_unlock(&pd->tx_frame_lock); | |
703 | while (first) { | |
704 | f = container_of(first, struct oz_tx_frame, link); | |
705 | first = first->next; | |
706 | oz_retire_frame(pd, f); | |
707 | } | |
708 | } | |
709 | /*------------------------------------------------------------------------------ | |
710 | * Precondition: stream_lock must be held. | |
711 | * Context: softirq | |
712 | */ | |
713 | static struct oz_isoc_stream *pd_stream_find(struct oz_pd *pd, u8 ep_num) | |
714 | { | |
715 | struct list_head *e; | |
716 | struct oz_isoc_stream *st; | |
717 | list_for_each(e, &pd->stream_list) { | |
718 | st = container_of(e, struct oz_isoc_stream, link); | |
719 | if (st->ep_num == ep_num) | |
720 | return st; | |
721 | } | |
722 | return 0; | |
723 | } | |
724 | /*------------------------------------------------------------------------------ | |
725 | * Context: softirq | |
726 | */ | |
727 | int oz_isoc_stream_create(struct oz_pd *pd, u8 ep_num) | |
728 | { | |
729 | struct oz_isoc_stream *st = | |
1ec41a31 | 730 | kzalloc(sizeof(struct oz_isoc_stream), GFP_ATOMIC); |
bc3157dd | 731 | if (!st) |
1ec41a31 | 732 | return -ENOMEM; |
bc3157dd CK |
733 | st->ep_num = ep_num; |
734 | spin_lock_bh(&pd->stream_lock); | |
735 | if (!pd_stream_find(pd, ep_num)) { | |
736 | list_add(&st->link, &pd->stream_list); | |
737 | st = 0; | |
738 | } | |
739 | spin_unlock_bh(&pd->stream_lock); | |
740 | if (st) | |
1ec41a31 | 741 | kfree(st); |
bc3157dd CK |
742 | return 0; |
743 | } | |
744 | /*------------------------------------------------------------------------------ | |
745 | * Context: softirq or process | |
746 | */ | |
747 | static void oz_isoc_stream_free(struct oz_isoc_stream *st) | |
748 | { | |
0c925aa0 | 749 | kfree_skb(st->skb); |
1ec41a31 | 750 | kfree(st); |
bc3157dd CK |
751 | } |
752 | /*------------------------------------------------------------------------------ | |
753 | * Context: softirq | |
754 | */ | |
755 | int oz_isoc_stream_delete(struct oz_pd *pd, u8 ep_num) | |
756 | { | |
757 | struct oz_isoc_stream *st; | |
758 | spin_lock_bh(&pd->stream_lock); | |
759 | st = pd_stream_find(pd, ep_num); | |
760 | if (st) | |
761 | list_del(&st->link); | |
762 | spin_unlock_bh(&pd->stream_lock); | |
763 | if (st) | |
764 | oz_isoc_stream_free(st); | |
765 | return 0; | |
766 | } | |
767 | /*------------------------------------------------------------------------------ | |
768 | * Context: any | |
769 | */ | |
770 | static void oz_isoc_destructor(struct sk_buff *skb) | |
771 | { | |
772 | atomic_dec(&g_submitted_isoc); | |
773 | oz_event_log(OZ_EVT_TX_ISOC_DONE, atomic_read(&g_submitted_isoc), | |
774 | 0, skb, 0); | |
775 | } | |
776 | /*------------------------------------------------------------------------------ | |
777 | * Context: softirq | |
778 | */ | |
779 | int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, u8 *data, int len) | |
780 | { | |
781 | struct net_device *dev = pd->net_dev; | |
782 | struct oz_isoc_stream *st; | |
783 | u8 nb_units = 0; | |
784 | struct sk_buff *skb = 0; | |
785 | struct oz_hdr *oz_hdr = 0; | |
786 | int size = 0; | |
787 | spin_lock_bh(&pd->stream_lock); | |
788 | st = pd_stream_find(pd, ep_num); | |
789 | if (st) { | |
790 | skb = st->skb; | |
791 | st->skb = 0; | |
792 | nb_units = st->nb_units; | |
793 | st->nb_units = 0; | |
794 | oz_hdr = st->oz_hdr; | |
795 | size = st->size; | |
796 | } | |
797 | spin_unlock_bh(&pd->stream_lock); | |
798 | if (!st) | |
799 | return 0; | |
800 | if (!skb) { | |
801 | /* Allocate enough space for max size frame. */ | |
802 | skb = alloc_skb(pd->max_tx_size + OZ_ALLOCATED_SPACE(dev), | |
803 | GFP_ATOMIC); | |
804 | if (skb == 0) | |
805 | return 0; | |
806 | /* Reserve the head room for lower layers. */ | |
807 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
808 | skb_reset_network_header(skb); | |
809 | skb->dev = dev; | |
810 | skb->protocol = htons(OZ_ETHERTYPE); | |
86c948b4 RG |
811 | /* For audio packet set priority to AC_VO */ |
812 | skb->priority = 0x7; | |
bc3157dd CK |
813 | size = sizeof(struct oz_hdr) + sizeof(struct oz_isoc_large); |
814 | oz_hdr = (struct oz_hdr *)skb_put(skb, size); | |
815 | } | |
816 | memcpy(skb_put(skb, len), data, len); | |
817 | size += len; | |
818 | if (++nb_units < pd->ms_per_isoc) { | |
819 | spin_lock_bh(&pd->stream_lock); | |
820 | st->skb = skb; | |
821 | st->nb_units = nb_units; | |
822 | st->oz_hdr = oz_hdr; | |
823 | st->size = size; | |
824 | spin_unlock_bh(&pd->stream_lock); | |
825 | } else { | |
826 | struct oz_hdr oz; | |
827 | struct oz_isoc_large iso; | |
828 | spin_lock_bh(&pd->stream_lock); | |
829 | iso.frame_number = st->frame_num; | |
830 | st->frame_num += nb_units; | |
831 | spin_unlock_bh(&pd->stream_lock); | |
832 | oz.control = | |
833 | (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC; | |
834 | oz.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
835 | oz.pkt_num = 0; | |
836 | iso.endpoint = ep_num; | |
837 | iso.format = OZ_DATA_F_ISOC_LARGE; | |
838 | iso.ms_data = nb_units; | |
839 | memcpy(oz_hdr, &oz, sizeof(oz)); | |
840 | memcpy(oz_hdr+1, &iso, sizeof(iso)); | |
841 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
33e6ada1 RG |
842 | dev->dev_addr, skb->len) < 0) |
843 | goto out; | |
844 | ||
845 | skb->destructor = oz_isoc_destructor; | |
846 | /*Queue for Xmit if mode is not ANYTIME*/ | |
847 | if (!(pd->mode & OZ_F_ISOC_ANYTIME)) { | |
848 | struct oz_tx_frame *isoc_unit = NULL; | |
849 | int nb = pd->nb_queued_isoc_frames; | |
86d03a0f | 850 | if (nb >= pd->isoc_latency) { |
33e6ada1 RG |
851 | oz_trace2(OZ_TRACE_TX_FRAMES, |
852 | "Dropping ISOC Unit nb= %d\n", | |
853 | nb); | |
854 | goto out; | |
855 | } | |
856 | isoc_unit = oz_tx_frame_alloc(pd); | |
857 | if (isoc_unit == NULL) | |
858 | goto out; | |
859 | isoc_unit->hdr = oz; | |
860 | isoc_unit->skb = skb; | |
861 | spin_lock_bh(&pd->tx_frame_lock); | |
862 | list_add_tail(&isoc_unit->link, &pd->tx_queue); | |
863 | pd->nb_queued_isoc_frames++; | |
864 | spin_unlock_bh(&pd->tx_frame_lock); | |
865 | oz_trace2(OZ_TRACE_TX_FRAMES, | |
866 | "Added ISOC Frame to Tx Queue isoc_nb= %d, nb= %d\n", | |
867 | pd->nb_queued_isoc_frames, pd->nb_queued_frames); | |
868 | oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number, | |
869 | skb, atomic_read(&g_submitted_isoc)); | |
870 | return 0; | |
bc3157dd | 871 | } |
33e6ada1 RG |
872 | |
873 | /*In ANYTIME mode Xmit unit immediately*/ | |
bc3157dd | 874 | if (atomic_read(&g_submitted_isoc) < OZ_MAX_SUBMITTED_ISOC) { |
bc3157dd CK |
875 | atomic_inc(&g_submitted_isoc); |
876 | oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number, | |
33e6ada1 RG |
877 | skb, atomic_read(&g_submitted_isoc)); |
878 | if (dev_queue_xmit(skb) < 0) { | |
879 | oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
bc3157dd | 880 | return -1; |
33e6ada1 RG |
881 | } else |
882 | return 0; | |
bc3157dd | 883 | } |
33e6ada1 RG |
884 | |
885 | out: oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
886 | kfree_skb(skb); | |
887 | return -1; | |
888 | ||
bc3157dd CK |
889 | } |
890 | return 0; | |
891 | } | |
892 | /*------------------------------------------------------------------------------ | |
893 | * Context: process | |
894 | */ | |
895 | void oz_apps_init(void) | |
896 | { | |
897 | int i; | |
898 | for (i = 0; i < OZ_APPID_MAX; i++) | |
899 | if (g_app_if[i].init) | |
900 | g_app_if[i].init(); | |
901 | } | |
902 | /*------------------------------------------------------------------------------ | |
903 | * Context: process | |
904 | */ | |
905 | void oz_apps_term(void) | |
906 | { | |
907 | int i; | |
908 | /* Terminate all the apps. */ | |
909 | for (i = 0; i < OZ_APPID_MAX; i++) | |
910 | if (g_app_if[i].term) | |
911 | g_app_if[i].term(); | |
912 | } | |
913 | /*------------------------------------------------------------------------------ | |
914 | * Context: softirq-serialized | |
915 | */ | |
916 | void oz_handle_app_elt(struct oz_pd *pd, u8 app_id, struct oz_elt *elt) | |
917 | { | |
918 | struct oz_app_if *ai; | |
92a62532 | 919 | if (app_id == 0 || app_id > OZ_APPID_MAX) |
bc3157dd CK |
920 | return; |
921 | ai = &g_app_if[app_id-1]; | |
922 | ai->rx(pd, elt); | |
923 | } | |
924 | /*------------------------------------------------------------------------------ | |
925 | * Context: softirq or process | |
926 | */ | |
927 | void oz_pd_indicate_farewells(struct oz_pd *pd) | |
928 | { | |
929 | struct oz_farewell *f; | |
930 | struct oz_app_if *ai = &g_app_if[OZ_APPID_USB-1]; | |
931 | while (1) { | |
932 | oz_polling_lock_bh(); | |
933 | if (list_empty(&pd->farewell_list)) { | |
934 | oz_polling_unlock_bh(); | |
935 | break; | |
936 | } | |
937 | f = list_first_entry(&pd->farewell_list, | |
938 | struct oz_farewell, link); | |
939 | list_del(&f->link); | |
940 | oz_polling_unlock_bh(); | |
941 | if (ai->farewell) | |
942 | ai->farewell(pd, f->ep_num, f->report, f->len); | |
1ec41a31 | 943 | kfree(f); |
bc3157dd CK |
944 | } |
945 | } |