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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 | |
33e6ada1 | 27 | /* Maximum number of uncompleted isoc frames that can be pending in network. |
bc3157dd CK |
28 | */ |
29 | #define OZ_MAX_SUBMITTED_ISOC 16 | |
33e6ada1 RG |
30 | /* Maximum number of uncompleted isoc frames that can be pending in Tx Queue. |
31 | */ | |
32 | #define OZ_MAX_TX_QUEUE_ISOC 32 | |
bc3157dd CK |
33 | /*------------------------------------------------------------------------------ |
34 | */ | |
35 | static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd); | |
36 | static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f); | |
33e6ada1 | 37 | static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f); |
bc3157dd CK |
38 | static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f); |
39 | static int oz_send_isoc_frame(struct oz_pd *pd); | |
40 | static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f); | |
41 | static void oz_isoc_stream_free(struct oz_isoc_stream *st); | |
33e6ada1 | 42 | static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data); |
bc3157dd CK |
43 | static void oz_isoc_destructor(struct sk_buff *skb); |
44 | static int oz_def_app_init(void); | |
45 | static void oz_def_app_term(void); | |
46 | static int oz_def_app_start(struct oz_pd *pd, int resume); | |
47 | static void oz_def_app_stop(struct oz_pd *pd, int pause); | |
48 | static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt); | |
49 | /*------------------------------------------------------------------------------ | |
50 | * Counts the uncompleted isoc frames submitted to netcard. | |
51 | */ | |
52 | static atomic_t g_submitted_isoc = ATOMIC_INIT(0); | |
53 | /* Application handler functions. | |
54 | */ | |
55 | static struct oz_app_if g_app_if[OZ_APPID_MAX] = { | |
56 | {oz_usb_init, | |
57 | oz_usb_term, | |
58 | oz_usb_start, | |
59 | oz_usb_stop, | |
60 | oz_usb_rx, | |
61 | oz_usb_heartbeat, | |
62 | oz_usb_farewell, | |
63 | OZ_APPID_USB}, | |
64 | ||
65 | {oz_def_app_init, | |
66 | oz_def_app_term, | |
67 | oz_def_app_start, | |
68 | oz_def_app_stop, | |
69 | oz_def_app_rx, | |
70 | 0, | |
71 | 0, | |
72 | OZ_APPID_UNUSED1}, | |
73 | ||
74 | {oz_def_app_init, | |
75 | oz_def_app_term, | |
76 | oz_def_app_start, | |
77 | oz_def_app_stop, | |
78 | oz_def_app_rx, | |
79 | 0, | |
80 | 0, | |
81 | OZ_APPID_UNUSED2}, | |
82 | ||
83 | {oz_cdev_init, | |
84 | oz_cdev_term, | |
85 | oz_cdev_start, | |
86 | oz_cdev_stop, | |
87 | oz_cdev_rx, | |
88 | 0, | |
89 | 0, | |
90 | OZ_APPID_SERIAL}, | |
91 | }; | |
92 | /*------------------------------------------------------------------------------ | |
93 | * Context: process | |
94 | */ | |
95 | static int oz_def_app_init(void) | |
96 | { | |
97 | return 0; | |
98 | } | |
99 | /*------------------------------------------------------------------------------ | |
100 | * Context: process | |
101 | */ | |
102 | static void oz_def_app_term(void) | |
103 | { | |
104 | } | |
105 | /*------------------------------------------------------------------------------ | |
106 | * Context: softirq | |
107 | */ | |
108 | static int oz_def_app_start(struct oz_pd *pd, int resume) | |
109 | { | |
110 | return 0; | |
111 | } | |
112 | /*------------------------------------------------------------------------------ | |
113 | * Context: softirq | |
114 | */ | |
115 | static void oz_def_app_stop(struct oz_pd *pd, int pause) | |
116 | { | |
117 | } | |
118 | /*------------------------------------------------------------------------------ | |
119 | * Context: softirq | |
120 | */ | |
121 | static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt) | |
122 | { | |
123 | } | |
124 | /*------------------------------------------------------------------------------ | |
125 | * Context: softirq or process | |
126 | */ | |
127 | void oz_pd_set_state(struct oz_pd *pd, unsigned state) | |
128 | { | |
129 | pd->state = state; | |
130 | oz_event_log(OZ_EVT_PD_STATE, 0, 0, 0, state); | |
131 | #ifdef WANT_TRACE | |
132 | switch (state) { | |
133 | case OZ_PD_S_IDLE: | |
134 | oz_trace("PD State: OZ_PD_S_IDLE\n"); | |
135 | break; | |
136 | case OZ_PD_S_CONNECTED: | |
137 | oz_trace("PD State: OZ_PD_S_CONNECTED\n"); | |
138 | break; | |
139 | case OZ_PD_S_STOPPED: | |
140 | oz_trace("PD State: OZ_PD_S_STOPPED\n"); | |
141 | break; | |
142 | case OZ_PD_S_SLEEP: | |
143 | oz_trace("PD State: OZ_PD_S_SLEEP\n"); | |
144 | break; | |
145 | } | |
146 | #endif /* WANT_TRACE */ | |
147 | } | |
148 | /*------------------------------------------------------------------------------ | |
149 | * Context: softirq or process | |
150 | */ | |
151 | void oz_pd_get(struct oz_pd *pd) | |
152 | { | |
153 | atomic_inc(&pd->ref_count); | |
154 | } | |
155 | /*------------------------------------------------------------------------------ | |
156 | * Context: softirq or process | |
157 | */ | |
158 | void oz_pd_put(struct oz_pd *pd) | |
159 | { | |
160 | if (atomic_dec_and_test(&pd->ref_count)) | |
161 | oz_pd_destroy(pd); | |
162 | } | |
163 | /*------------------------------------------------------------------------------ | |
164 | * Context: softirq-serialized | |
165 | */ | |
166 | struct oz_pd *oz_pd_alloc(u8 *mac_addr) | |
167 | { | |
1ec41a31 | 168 | struct oz_pd *pd = kzalloc(sizeof(struct oz_pd), GFP_ATOMIC); |
bc3157dd CK |
169 | if (pd) { |
170 | int i; | |
bc3157dd CK |
171 | atomic_set(&pd->ref_count, 2); |
172 | for (i = 0; i < OZ_APPID_MAX; i++) | |
173 | spin_lock_init(&pd->app_lock[i]); | |
174 | pd->last_rx_pkt_num = 0xffffffff; | |
175 | oz_pd_set_state(pd, OZ_PD_S_IDLE); | |
176 | pd->max_tx_size = OZ_MAX_TX_SIZE; | |
177 | memcpy(pd->mac_addr, mac_addr, ETH_ALEN); | |
178 | if (0 != oz_elt_buf_init(&pd->elt_buff)) { | |
1ec41a31 | 179 | kfree(pd); |
bc3157dd CK |
180 | pd = 0; |
181 | } | |
182 | spin_lock_init(&pd->tx_frame_lock); | |
183 | INIT_LIST_HEAD(&pd->tx_queue); | |
184 | INIT_LIST_HEAD(&pd->farewell_list); | |
185 | pd->last_sent_frame = &pd->tx_queue; | |
186 | spin_lock_init(&pd->stream_lock); | |
187 | INIT_LIST_HEAD(&pd->stream_list); | |
188 | } | |
189 | return pd; | |
190 | } | |
191 | /*------------------------------------------------------------------------------ | |
192 | * Context: softirq or process | |
193 | */ | |
194 | void oz_pd_destroy(struct oz_pd *pd) | |
195 | { | |
196 | struct list_head *e; | |
197 | struct oz_tx_frame *f; | |
198 | struct oz_isoc_stream *st; | |
199 | struct oz_farewell *fwell; | |
200 | oz_trace("Destroying PD\n"); | |
201 | /* Delete any streams. | |
202 | */ | |
203 | e = pd->stream_list.next; | |
204 | while (e != &pd->stream_list) { | |
205 | st = container_of(e, struct oz_isoc_stream, link); | |
206 | e = e->next; | |
207 | oz_isoc_stream_free(st); | |
208 | } | |
209 | /* Free any queued tx frames. | |
210 | */ | |
211 | e = pd->tx_queue.next; | |
212 | while (e != &pd->tx_queue) { | |
213 | f = container_of(e, struct oz_tx_frame, link); | |
214 | e = e->next; | |
33e6ada1 RG |
215 | if (f->skb != NULL) |
216 | kfree_skb(f->skb); | |
bc3157dd CK |
217 | oz_retire_frame(pd, f); |
218 | } | |
219 | oz_elt_buf_term(&pd->elt_buff); | |
220 | /* Free any farewells. | |
221 | */ | |
222 | e = pd->farewell_list.next; | |
223 | while (e != &pd->farewell_list) { | |
224 | fwell = container_of(e, struct oz_farewell, link); | |
225 | e = e->next; | |
1ec41a31 | 226 | kfree(fwell); |
bc3157dd CK |
227 | } |
228 | /* Deallocate all frames in tx pool. | |
229 | */ | |
230 | while (pd->tx_pool) { | |
231 | e = pd->tx_pool; | |
232 | pd->tx_pool = e->next; | |
1ec41a31 | 233 | kfree(container_of(e, struct oz_tx_frame, link)); |
bc3157dd CK |
234 | } |
235 | if (pd->net_dev) | |
236 | dev_put(pd->net_dev); | |
1ec41a31 | 237 | kfree(pd); |
bc3157dd CK |
238 | } |
239 | /*------------------------------------------------------------------------------ | |
240 | * Context: softirq-serialized | |
241 | */ | |
242 | int oz_services_start(struct oz_pd *pd, u16 apps, int resume) | |
243 | { | |
244 | struct oz_app_if *ai; | |
245 | int rc = 0; | |
246 | oz_trace("oz_services_start(0x%x) resume(%d)\n", apps, resume); | |
247 | for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) { | |
248 | if (apps & (1<<ai->app_id)) { | |
249 | if (ai->start(pd, resume)) { | |
250 | rc = -1; | |
251 | oz_trace("Unabled to start service %d\n", | |
252 | ai->app_id); | |
253 | break; | |
254 | } | |
255 | oz_polling_lock_bh(); | |
256 | pd->total_apps |= (1<<ai->app_id); | |
257 | if (resume) | |
258 | pd->paused_apps &= ~(1<<ai->app_id); | |
259 | oz_polling_unlock_bh(); | |
260 | } | |
261 | } | |
262 | return rc; | |
263 | } | |
264 | /*------------------------------------------------------------------------------ | |
265 | * Context: softirq or process | |
266 | */ | |
267 | void oz_services_stop(struct oz_pd *pd, u16 apps, int pause) | |
268 | { | |
269 | struct oz_app_if *ai; | |
270 | oz_trace("oz_stop_services(0x%x) pause(%d)\n", apps, pause); | |
271 | for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) { | |
272 | if (apps & (1<<ai->app_id)) { | |
273 | oz_polling_lock_bh(); | |
274 | if (pause) { | |
275 | pd->paused_apps |= (1<<ai->app_id); | |
276 | } else { | |
277 | pd->total_apps &= ~(1<<ai->app_id); | |
278 | pd->paused_apps &= ~(1<<ai->app_id); | |
279 | } | |
280 | oz_polling_unlock_bh(); | |
281 | ai->stop(pd, pause); | |
282 | } | |
283 | } | |
284 | } | |
285 | /*------------------------------------------------------------------------------ | |
286 | * Context: softirq | |
287 | */ | |
288 | void oz_pd_heartbeat(struct oz_pd *pd, u16 apps) | |
289 | { | |
290 | struct oz_app_if *ai; | |
291 | int more = 0; | |
292 | for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) { | |
293 | if (ai->heartbeat && (apps & (1<<ai->app_id))) { | |
294 | if (ai->heartbeat(pd)) | |
295 | more = 1; | |
296 | } | |
297 | } | |
298 | if (more) | |
299 | oz_pd_request_heartbeat(pd); | |
300 | if (pd->mode & OZ_F_ISOC_ANYTIME) { | |
301 | int count = 8; | |
302 | while (count-- && (oz_send_isoc_frame(pd) >= 0)) | |
303 | ; | |
304 | } | |
305 | } | |
306 | /*------------------------------------------------------------------------------ | |
307 | * Context: softirq or process | |
308 | */ | |
309 | void oz_pd_stop(struct oz_pd *pd) | |
310 | { | |
311 | u16 stop_apps = 0; | |
312 | oz_trace("oz_pd_stop() State = 0x%x\n", pd->state); | |
313 | oz_pd_indicate_farewells(pd); | |
314 | oz_polling_lock_bh(); | |
315 | stop_apps = pd->total_apps; | |
316 | pd->total_apps = 0; | |
317 | pd->paused_apps = 0; | |
318 | oz_polling_unlock_bh(); | |
319 | oz_services_stop(pd, stop_apps, 0); | |
320 | oz_polling_lock_bh(); | |
321 | oz_pd_set_state(pd, OZ_PD_S_STOPPED); | |
322 | /* Remove from PD list.*/ | |
323 | list_del(&pd->link); | |
324 | oz_polling_unlock_bh(); | |
325 | oz_trace("pd ref count = %d\n", atomic_read(&pd->ref_count)); | |
326 | oz_timer_delete(pd, 0); | |
327 | oz_pd_put(pd); | |
328 | } | |
329 | /*------------------------------------------------------------------------------ | |
330 | * Context: softirq | |
331 | */ | |
332 | int oz_pd_sleep(struct oz_pd *pd) | |
333 | { | |
334 | int do_stop = 0; | |
335 | u16 stop_apps = 0; | |
336 | oz_polling_lock_bh(); | |
337 | if (pd->state & (OZ_PD_S_SLEEP | OZ_PD_S_STOPPED)) { | |
338 | oz_polling_unlock_bh(); | |
339 | return 0; | |
340 | } | |
341 | if (pd->keep_alive_j && pd->session_id) { | |
342 | oz_pd_set_state(pd, OZ_PD_S_SLEEP); | |
343 | pd->pulse_time_j = jiffies + pd->keep_alive_j; | |
344 | oz_trace("Sleep Now %lu until %lu\n", | |
345 | jiffies, pd->pulse_time_j); | |
346 | } else { | |
347 | do_stop = 1; | |
348 | } | |
349 | stop_apps = pd->total_apps; | |
350 | oz_polling_unlock_bh(); | |
351 | if (do_stop) { | |
352 | oz_pd_stop(pd); | |
353 | } else { | |
354 | oz_services_stop(pd, stop_apps, 1); | |
355 | oz_timer_add(pd, OZ_TIMER_STOP, jiffies + pd->keep_alive_j, 1); | |
356 | } | |
357 | return do_stop; | |
358 | } | |
359 | /*------------------------------------------------------------------------------ | |
360 | * Context: softirq | |
361 | */ | |
362 | static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd) | |
363 | { | |
364 | struct oz_tx_frame *f = 0; | |
365 | spin_lock_bh(&pd->tx_frame_lock); | |
366 | if (pd->tx_pool) { | |
367 | f = container_of(pd->tx_pool, struct oz_tx_frame, link); | |
368 | pd->tx_pool = pd->tx_pool->next; | |
369 | pd->tx_pool_count--; | |
370 | } | |
371 | spin_unlock_bh(&pd->tx_frame_lock); | |
372 | if (f == 0) | |
1ec41a31 | 373 | f = kmalloc(sizeof(struct oz_tx_frame), GFP_ATOMIC); |
bc3157dd CK |
374 | if (f) { |
375 | f->total_size = sizeof(struct oz_hdr); | |
376 | INIT_LIST_HEAD(&f->link); | |
377 | INIT_LIST_HEAD(&f->elt_list); | |
378 | } | |
379 | return f; | |
380 | } | |
33e6ada1 RG |
381 | /*------------------------------------------------------------------------------ |
382 | * Context: softirq or process | |
383 | */ | |
384 | static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f) | |
385 | { | |
386 | pd->nb_queued_isoc_frames--; | |
387 | list_del_init(&f->link); | |
388 | if (pd->tx_pool_count < OZ_MAX_TX_POOL_SIZE) { | |
389 | f->link.next = pd->tx_pool; | |
390 | pd->tx_pool = &f->link; | |
391 | pd->tx_pool_count++; | |
392 | } else { | |
393 | kfree(f); | |
394 | } | |
395 | oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing ISOC Frame isoc_nb= %d\n", | |
396 | pd->nb_queued_isoc_frames); | |
397 | } | |
bc3157dd CK |
398 | /*------------------------------------------------------------------------------ |
399 | * Context: softirq or process | |
400 | */ | |
401 | static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f) | |
402 | { | |
403 | spin_lock_bh(&pd->tx_frame_lock); | |
404 | if (pd->tx_pool_count < OZ_MAX_TX_POOL_SIZE) { | |
405 | f->link.next = pd->tx_pool; | |
406 | pd->tx_pool = &f->link; | |
407 | pd->tx_pool_count++; | |
408 | f = 0; | |
bc3157dd CK |
409 | } |
410 | spin_unlock_bh(&pd->tx_frame_lock); | |
411 | if (f) | |
1ec41a31 | 412 | kfree(f); |
bc3157dd | 413 | } |
33e6ada1 RG |
414 | /*------------------------------------------------------------------------------ |
415 | * Context: softirq-serialized | |
416 | */ | |
417 | void oz_set_more_bit(struct sk_buff *skb) | |
418 | { | |
419 | struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb); | |
420 | oz_hdr->control |= OZ_F_MORE_DATA; | |
421 | } | |
00ec12b8 RG |
422 | /*------------------------------------------------------------------------------ |
423 | * Context: softirq-serialized | |
424 | */ | |
425 | void oz_set_last_pkt_nb(struct oz_pd *pd, struct sk_buff *skb) | |
426 | { | |
427 | struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb); | |
428 | oz_hdr->last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
429 | } | |
bc3157dd CK |
430 | /*------------------------------------------------------------------------------ |
431 | * Context: softirq | |
432 | */ | |
433 | int oz_prepare_frame(struct oz_pd *pd, int empty) | |
434 | { | |
435 | struct oz_tx_frame *f; | |
436 | if ((pd->mode & OZ_MODE_MASK) != OZ_MODE_TRIGGERED) | |
437 | return -1; | |
438 | if (pd->nb_queued_frames >= OZ_MAX_QUEUED_FRAMES) | |
439 | return -1; | |
440 | if (!empty && !oz_are_elts_available(&pd->elt_buff)) | |
441 | return -1; | |
442 | f = oz_tx_frame_alloc(pd); | |
443 | if (f == 0) | |
444 | return -1; | |
33e6ada1 | 445 | f->skb = NULL; |
bc3157dd CK |
446 | f->hdr.control = |
447 | (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ACK_REQUESTED; | |
448 | ++pd->last_tx_pkt_num; | |
449 | put_unaligned(cpu_to_le32(pd->last_tx_pkt_num), &f->hdr.pkt_num); | |
450 | if (empty == 0) { | |
451 | oz_select_elts_for_tx(&pd->elt_buff, 0, &f->total_size, | |
452 | pd->max_tx_size, &f->elt_list); | |
453 | } | |
454 | spin_lock(&pd->tx_frame_lock); | |
455 | list_add_tail(&f->link, &pd->tx_queue); | |
456 | pd->nb_queued_frames++; | |
457 | spin_unlock(&pd->tx_frame_lock); | |
458 | return 0; | |
459 | } | |
460 | /*------------------------------------------------------------------------------ | |
461 | * Context: softirq-serialized | |
462 | */ | |
463 | static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f) | |
464 | { | |
465 | struct sk_buff *skb = 0; | |
466 | struct net_device *dev = pd->net_dev; | |
467 | struct oz_hdr *oz_hdr; | |
468 | struct oz_elt *elt; | |
469 | struct list_head *e; | |
470 | /* Allocate skb with enough space for the lower layers as well | |
471 | * as the space we need. | |
472 | */ | |
473 | skb = alloc_skb(f->total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC); | |
474 | if (skb == 0) | |
475 | return 0; | |
476 | /* Reserve the head room for lower layers. | |
477 | */ | |
478 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
479 | skb_reset_network_header(skb); | |
480 | skb->dev = dev; | |
481 | skb->protocol = htons(OZ_ETHERTYPE); | |
482 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
483 | dev->dev_addr, skb->len) < 0) | |
484 | goto fail; | |
485 | /* Push the tail to the end of the area we are going to copy to. | |
486 | */ | |
487 | oz_hdr = (struct oz_hdr *)skb_put(skb, f->total_size); | |
488 | f->hdr.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
489 | memcpy(oz_hdr, &f->hdr, sizeof(struct oz_hdr)); | |
490 | /* Copy the elements into the frame body. | |
491 | */ | |
492 | elt = (struct oz_elt *)(oz_hdr+1); | |
493 | for (e = f->elt_list.next; e != &f->elt_list; e = e->next) { | |
494 | struct oz_elt_info *ei; | |
495 | ei = container_of(e, struct oz_elt_info, link); | |
496 | memcpy(elt, ei->data, ei->length); | |
497 | elt = oz_next_elt(elt); | |
498 | } | |
499 | return skb; | |
500 | fail: | |
501 | kfree_skb(skb); | |
502 | return 0; | |
503 | } | |
504 | /*------------------------------------------------------------------------------ | |
505 | * Context: softirq or process | |
506 | */ | |
507 | static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f) | |
508 | { | |
509 | struct list_head *e; | |
510 | struct oz_elt_info *ei; | |
511 | e = f->elt_list.next; | |
512 | while (e != &f->elt_list) { | |
513 | ei = container_of(e, struct oz_elt_info, link); | |
514 | e = e->next; | |
515 | list_del_init(&ei->link); | |
516 | if (ei->callback) | |
517 | ei->callback(pd, ei->context); | |
518 | spin_lock_bh(&pd->elt_buff.lock); | |
519 | oz_elt_info_free(&pd->elt_buff, ei); | |
520 | spin_unlock_bh(&pd->elt_buff.lock); | |
521 | } | |
522 | oz_tx_frame_free(pd, f); | |
523 | if (pd->elt_buff.free_elts > pd->elt_buff.max_free_elts) | |
524 | oz_trim_elt_pool(&pd->elt_buff); | |
525 | } | |
526 | /*------------------------------------------------------------------------------ | |
527 | * Context: softirq-serialized | |
528 | */ | |
33e6ada1 | 529 | static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data) |
bc3157dd CK |
530 | { |
531 | struct sk_buff *skb; | |
532 | struct oz_tx_frame *f; | |
533 | struct list_head *e; | |
bc3157dd CK |
534 | spin_lock(&pd->tx_frame_lock); |
535 | e = pd->last_sent_frame->next; | |
536 | if (e == &pd->tx_queue) { | |
537 | spin_unlock(&pd->tx_frame_lock); | |
538 | return -1; | |
539 | } | |
bc3157dd | 540 | f = container_of(e, struct oz_tx_frame, link); |
33e6ada1 RG |
541 | |
542 | if (f->skb != NULL) { | |
543 | skb = f->skb; | |
544 | oz_tx_isoc_free(pd, f); | |
545 | spin_unlock(&pd->tx_frame_lock); | |
546 | if (more_data) | |
547 | oz_set_more_bit(skb); | |
00ec12b8 | 548 | oz_set_last_pkt_nb(pd, skb); |
33e6ada1 RG |
549 | if ((int)atomic_read(&g_submitted_isoc) < |
550 | OZ_MAX_SUBMITTED_ISOC) { | |
551 | if (dev_queue_xmit(skb) < 0) { | |
552 | oz_trace2(OZ_TRACE_TX_FRAMES, | |
553 | "Dropping ISOC Frame\n"); | |
554 | oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
555 | return -1; | |
556 | } | |
557 | atomic_inc(&g_submitted_isoc); | |
558 | oz_trace2(OZ_TRACE_TX_FRAMES, | |
559 | "Sending ISOC Frame, nb_isoc= %d\n", | |
560 | pd->nb_queued_isoc_frames); | |
561 | return 0; | |
562 | } else { | |
563 | kfree_skb(skb); | |
564 | oz_trace2(OZ_TRACE_TX_FRAMES, "Dropping ISOC Frame>\n"); | |
565 | oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
566 | return -1; | |
567 | } | |
568 | } | |
569 | ||
570 | pd->last_sent_frame = e; | |
bc3157dd CK |
571 | skb = oz_build_frame(pd, f); |
572 | spin_unlock(&pd->tx_frame_lock); | |
33e6ada1 RG |
573 | if (more_data) |
574 | oz_set_more_bit(skb); | |
bc3157dd CK |
575 | oz_trace2(OZ_TRACE_TX_FRAMES, "TX frame PN=0x%x\n", f->hdr.pkt_num); |
576 | if (skb) { | |
577 | oz_event_log(OZ_EVT_TX_FRAME, | |
578 | 0, | |
579 | (((u16)f->hdr.control)<<8)|f->hdr.last_pkt_num, | |
580 | 0, f->hdr.pkt_num); | |
581 | if (dev_queue_xmit(skb) < 0) | |
582 | return -1; | |
33e6ada1 | 583 | |
bc3157dd CK |
584 | } |
585 | return 0; | |
586 | } | |
587 | /*------------------------------------------------------------------------------ | |
588 | * Context: softirq-serialized | |
589 | */ | |
590 | void oz_send_queued_frames(struct oz_pd *pd, int backlog) | |
591 | { | |
33e6ada1 RG |
592 | while (oz_prepare_frame(pd, 0) >= 0) |
593 | backlog++; | |
594 | ||
595 | switch (pd->mode & (OZ_F_ISOC_NO_ELTS | OZ_F_ISOC_ANYTIME)) { | |
596 | ||
597 | case OZ_F_ISOC_NO_ELTS: { | |
598 | backlog += pd->nb_queued_isoc_frames; | |
599 | if (backlog <= 0) | |
600 | goto out; | |
601 | if (backlog > OZ_MAX_SUBMITTED_ISOC) | |
602 | backlog = OZ_MAX_SUBMITTED_ISOC; | |
603 | break; | |
bc3157dd | 604 | } |
33e6ada1 RG |
605 | case OZ_NO_ELTS_ANYTIME: { |
606 | if ((backlog <= 0) && (pd->isoc_sent == 0)) | |
607 | goto out; | |
608 | break; | |
609 | } | |
610 | default: { | |
611 | if (backlog <= 0) | |
612 | goto out; | |
613 | break; | |
614 | } | |
615 | } | |
616 | while (backlog--) { | |
617 | if (oz_send_next_queued_frame(pd, backlog) < 0) | |
618 | break; | |
bc3157dd | 619 | } |
33e6ada1 RG |
620 | return; |
621 | ||
622 | out: oz_prepare_frame(pd, 1); | |
623 | oz_send_next_queued_frame(pd, 0); | |
bc3157dd CK |
624 | } |
625 | /*------------------------------------------------------------------------------ | |
626 | * Context: softirq | |
627 | */ | |
628 | static int oz_send_isoc_frame(struct oz_pd *pd) | |
629 | { | |
630 | struct sk_buff *skb = 0; | |
631 | struct net_device *dev = pd->net_dev; | |
632 | struct oz_hdr *oz_hdr; | |
633 | struct oz_elt *elt; | |
634 | struct list_head *e; | |
635 | struct list_head list; | |
636 | int total_size = sizeof(struct oz_hdr); | |
637 | INIT_LIST_HEAD(&list); | |
638 | ||
639 | oz_select_elts_for_tx(&pd->elt_buff, 1, &total_size, | |
640 | pd->max_tx_size, &list); | |
641 | if (list.next == &list) | |
642 | return 0; | |
643 | skb = alloc_skb(total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC); | |
644 | if (skb == 0) { | |
645 | oz_trace("Cannot alloc skb\n"); | |
646 | oz_elt_info_free_chain(&pd->elt_buff, &list); | |
647 | return -1; | |
648 | } | |
649 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
650 | skb_reset_network_header(skb); | |
651 | skb->dev = dev; | |
652 | skb->protocol = htons(OZ_ETHERTYPE); | |
653 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
654 | dev->dev_addr, skb->len) < 0) { | |
655 | kfree_skb(skb); | |
656 | return -1; | |
657 | } | |
658 | oz_hdr = (struct oz_hdr *)skb_put(skb, total_size); | |
659 | oz_hdr->control = (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC; | |
660 | oz_hdr->last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
661 | elt = (struct oz_elt *)(oz_hdr+1); | |
662 | ||
663 | for (e = list.next; e != &list; e = e->next) { | |
664 | struct oz_elt_info *ei; | |
665 | ei = container_of(e, struct oz_elt_info, link); | |
666 | memcpy(elt, ei->data, ei->length); | |
667 | elt = oz_next_elt(elt); | |
668 | } | |
669 | oz_event_log(OZ_EVT_TX_ISOC, 0, 0, 0, 0); | |
670 | dev_queue_xmit(skb); | |
671 | oz_elt_info_free_chain(&pd->elt_buff, &list); | |
672 | return 0; | |
673 | } | |
674 | /*------------------------------------------------------------------------------ | |
675 | * Context: softirq-serialized | |
676 | */ | |
677 | void oz_retire_tx_frames(struct oz_pd *pd, u8 lpn) | |
678 | { | |
679 | struct list_head *e; | |
680 | struct oz_tx_frame *f; | |
681 | struct list_head *first = 0; | |
682 | struct list_head *last = 0; | |
683 | u8 diff; | |
684 | u32 pkt_num; | |
685 | ||
686 | spin_lock(&pd->tx_frame_lock); | |
687 | e = pd->tx_queue.next; | |
688 | while (e != &pd->tx_queue) { | |
689 | f = container_of(e, struct oz_tx_frame, link); | |
690 | pkt_num = le32_to_cpu(get_unaligned(&f->hdr.pkt_num)); | |
691 | diff = (lpn - (pkt_num & OZ_LAST_PN_MASK)) & OZ_LAST_PN_MASK; | |
33e6ada1 | 692 | if ((diff > OZ_LAST_PN_HALF_CYCLE) || (pkt_num == 0)) |
bc3157dd | 693 | break; |
33e6ada1 RG |
694 | oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing pkt_num= %u, nb= %d\n", |
695 | pkt_num, pd->nb_queued_frames); | |
bc3157dd CK |
696 | if (first == 0) |
697 | first = e; | |
698 | last = e; | |
699 | e = e->next; | |
700 | pd->nb_queued_frames--; | |
701 | } | |
702 | if (first) { | |
703 | last->next->prev = &pd->tx_queue; | |
704 | pd->tx_queue.next = last->next; | |
705 | last->next = 0; | |
706 | } | |
707 | pd->last_sent_frame = &pd->tx_queue; | |
708 | spin_unlock(&pd->tx_frame_lock); | |
709 | while (first) { | |
710 | f = container_of(first, struct oz_tx_frame, link); | |
711 | first = first->next; | |
712 | oz_retire_frame(pd, f); | |
713 | } | |
714 | } | |
715 | /*------------------------------------------------------------------------------ | |
716 | * Precondition: stream_lock must be held. | |
717 | * Context: softirq | |
718 | */ | |
719 | static struct oz_isoc_stream *pd_stream_find(struct oz_pd *pd, u8 ep_num) | |
720 | { | |
721 | struct list_head *e; | |
722 | struct oz_isoc_stream *st; | |
723 | list_for_each(e, &pd->stream_list) { | |
724 | st = container_of(e, struct oz_isoc_stream, link); | |
725 | if (st->ep_num == ep_num) | |
726 | return st; | |
727 | } | |
728 | return 0; | |
729 | } | |
730 | /*------------------------------------------------------------------------------ | |
731 | * Context: softirq | |
732 | */ | |
733 | int oz_isoc_stream_create(struct oz_pd *pd, u8 ep_num) | |
734 | { | |
735 | struct oz_isoc_stream *st = | |
1ec41a31 | 736 | kzalloc(sizeof(struct oz_isoc_stream), GFP_ATOMIC); |
bc3157dd | 737 | if (!st) |
1ec41a31 | 738 | return -ENOMEM; |
bc3157dd CK |
739 | st->ep_num = ep_num; |
740 | spin_lock_bh(&pd->stream_lock); | |
741 | if (!pd_stream_find(pd, ep_num)) { | |
742 | list_add(&st->link, &pd->stream_list); | |
743 | st = 0; | |
744 | } | |
745 | spin_unlock_bh(&pd->stream_lock); | |
746 | if (st) | |
1ec41a31 | 747 | kfree(st); |
bc3157dd CK |
748 | return 0; |
749 | } | |
750 | /*------------------------------------------------------------------------------ | |
751 | * Context: softirq or process | |
752 | */ | |
753 | static void oz_isoc_stream_free(struct oz_isoc_stream *st) | |
754 | { | |
755 | if (st->skb) | |
756 | kfree_skb(st->skb); | |
1ec41a31 | 757 | kfree(st); |
bc3157dd CK |
758 | } |
759 | /*------------------------------------------------------------------------------ | |
760 | * Context: softirq | |
761 | */ | |
762 | int oz_isoc_stream_delete(struct oz_pd *pd, u8 ep_num) | |
763 | { | |
764 | struct oz_isoc_stream *st; | |
765 | spin_lock_bh(&pd->stream_lock); | |
766 | st = pd_stream_find(pd, ep_num); | |
767 | if (st) | |
768 | list_del(&st->link); | |
769 | spin_unlock_bh(&pd->stream_lock); | |
770 | if (st) | |
771 | oz_isoc_stream_free(st); | |
772 | return 0; | |
773 | } | |
774 | /*------------------------------------------------------------------------------ | |
775 | * Context: any | |
776 | */ | |
777 | static void oz_isoc_destructor(struct sk_buff *skb) | |
778 | { | |
779 | atomic_dec(&g_submitted_isoc); | |
780 | oz_event_log(OZ_EVT_TX_ISOC_DONE, atomic_read(&g_submitted_isoc), | |
781 | 0, skb, 0); | |
782 | } | |
783 | /*------------------------------------------------------------------------------ | |
784 | * Context: softirq | |
785 | */ | |
786 | int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, u8 *data, int len) | |
787 | { | |
788 | struct net_device *dev = pd->net_dev; | |
789 | struct oz_isoc_stream *st; | |
790 | u8 nb_units = 0; | |
791 | struct sk_buff *skb = 0; | |
792 | struct oz_hdr *oz_hdr = 0; | |
793 | int size = 0; | |
794 | spin_lock_bh(&pd->stream_lock); | |
795 | st = pd_stream_find(pd, ep_num); | |
796 | if (st) { | |
797 | skb = st->skb; | |
798 | st->skb = 0; | |
799 | nb_units = st->nb_units; | |
800 | st->nb_units = 0; | |
801 | oz_hdr = st->oz_hdr; | |
802 | size = st->size; | |
803 | } | |
804 | spin_unlock_bh(&pd->stream_lock); | |
805 | if (!st) | |
806 | return 0; | |
807 | if (!skb) { | |
808 | /* Allocate enough space for max size frame. */ | |
809 | skb = alloc_skb(pd->max_tx_size + OZ_ALLOCATED_SPACE(dev), | |
810 | GFP_ATOMIC); | |
811 | if (skb == 0) | |
812 | return 0; | |
813 | /* Reserve the head room for lower layers. */ | |
814 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
815 | skb_reset_network_header(skb); | |
816 | skb->dev = dev; | |
817 | skb->protocol = htons(OZ_ETHERTYPE); | |
86c948b4 RG |
818 | /* For audio packet set priority to AC_VO */ |
819 | skb->priority = 0x7; | |
bc3157dd CK |
820 | size = sizeof(struct oz_hdr) + sizeof(struct oz_isoc_large); |
821 | oz_hdr = (struct oz_hdr *)skb_put(skb, size); | |
822 | } | |
823 | memcpy(skb_put(skb, len), data, len); | |
824 | size += len; | |
825 | if (++nb_units < pd->ms_per_isoc) { | |
826 | spin_lock_bh(&pd->stream_lock); | |
827 | st->skb = skb; | |
828 | st->nb_units = nb_units; | |
829 | st->oz_hdr = oz_hdr; | |
830 | st->size = size; | |
831 | spin_unlock_bh(&pd->stream_lock); | |
832 | } else { | |
833 | struct oz_hdr oz; | |
834 | struct oz_isoc_large iso; | |
835 | spin_lock_bh(&pd->stream_lock); | |
836 | iso.frame_number = st->frame_num; | |
837 | st->frame_num += nb_units; | |
838 | spin_unlock_bh(&pd->stream_lock); | |
839 | oz.control = | |
840 | (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC; | |
841 | oz.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
842 | oz.pkt_num = 0; | |
843 | iso.endpoint = ep_num; | |
844 | iso.format = OZ_DATA_F_ISOC_LARGE; | |
845 | iso.ms_data = nb_units; | |
846 | memcpy(oz_hdr, &oz, sizeof(oz)); | |
847 | memcpy(oz_hdr+1, &iso, sizeof(iso)); | |
848 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
33e6ada1 RG |
849 | dev->dev_addr, skb->len) < 0) |
850 | goto out; | |
851 | ||
852 | skb->destructor = oz_isoc_destructor; | |
853 | /*Queue for Xmit if mode is not ANYTIME*/ | |
854 | if (!(pd->mode & OZ_F_ISOC_ANYTIME)) { | |
855 | struct oz_tx_frame *isoc_unit = NULL; | |
856 | int nb = pd->nb_queued_isoc_frames; | |
857 | if (nb >= OZ_MAX_TX_QUEUE_ISOC) { | |
858 | oz_trace2(OZ_TRACE_TX_FRAMES, | |
859 | "Dropping ISOC Unit nb= %d\n", | |
860 | nb); | |
861 | goto out; | |
862 | } | |
863 | isoc_unit = oz_tx_frame_alloc(pd); | |
864 | if (isoc_unit == NULL) | |
865 | goto out; | |
866 | isoc_unit->hdr = oz; | |
867 | isoc_unit->skb = skb; | |
868 | spin_lock_bh(&pd->tx_frame_lock); | |
869 | list_add_tail(&isoc_unit->link, &pd->tx_queue); | |
870 | pd->nb_queued_isoc_frames++; | |
871 | spin_unlock_bh(&pd->tx_frame_lock); | |
872 | oz_trace2(OZ_TRACE_TX_FRAMES, | |
873 | "Added ISOC Frame to Tx Queue isoc_nb= %d, nb= %d\n", | |
874 | pd->nb_queued_isoc_frames, pd->nb_queued_frames); | |
875 | oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number, | |
876 | skb, atomic_read(&g_submitted_isoc)); | |
877 | return 0; | |
bc3157dd | 878 | } |
33e6ada1 RG |
879 | |
880 | /*In ANYTIME mode Xmit unit immediately*/ | |
bc3157dd | 881 | if (atomic_read(&g_submitted_isoc) < OZ_MAX_SUBMITTED_ISOC) { |
bc3157dd CK |
882 | atomic_inc(&g_submitted_isoc); |
883 | oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number, | |
33e6ada1 RG |
884 | skb, atomic_read(&g_submitted_isoc)); |
885 | if (dev_queue_xmit(skb) < 0) { | |
886 | oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
bc3157dd | 887 | return -1; |
33e6ada1 RG |
888 | } else |
889 | return 0; | |
bc3157dd | 890 | } |
33e6ada1 RG |
891 | |
892 | out: oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
893 | kfree_skb(skb); | |
894 | return -1; | |
895 | ||
bc3157dd CK |
896 | } |
897 | return 0; | |
898 | } | |
899 | /*------------------------------------------------------------------------------ | |
900 | * Context: process | |
901 | */ | |
902 | void oz_apps_init(void) | |
903 | { | |
904 | int i; | |
905 | for (i = 0; i < OZ_APPID_MAX; i++) | |
906 | if (g_app_if[i].init) | |
907 | g_app_if[i].init(); | |
908 | } | |
909 | /*------------------------------------------------------------------------------ | |
910 | * Context: process | |
911 | */ | |
912 | void oz_apps_term(void) | |
913 | { | |
914 | int i; | |
915 | /* Terminate all the apps. */ | |
916 | for (i = 0; i < OZ_APPID_MAX; i++) | |
917 | if (g_app_if[i].term) | |
918 | g_app_if[i].term(); | |
919 | } | |
920 | /*------------------------------------------------------------------------------ | |
921 | * Context: softirq-serialized | |
922 | */ | |
923 | void oz_handle_app_elt(struct oz_pd *pd, u8 app_id, struct oz_elt *elt) | |
924 | { | |
925 | struct oz_app_if *ai; | |
92a62532 | 926 | if (app_id == 0 || app_id > OZ_APPID_MAX) |
bc3157dd CK |
927 | return; |
928 | ai = &g_app_if[app_id-1]; | |
929 | ai->rx(pd, elt); | |
930 | } | |
931 | /*------------------------------------------------------------------------------ | |
932 | * Context: softirq or process | |
933 | */ | |
934 | void oz_pd_indicate_farewells(struct oz_pd *pd) | |
935 | { | |
936 | struct oz_farewell *f; | |
937 | struct oz_app_if *ai = &g_app_if[OZ_APPID_USB-1]; | |
938 | while (1) { | |
939 | oz_polling_lock_bh(); | |
940 | if (list_empty(&pd->farewell_list)) { | |
941 | oz_polling_unlock_bh(); | |
942 | break; | |
943 | } | |
944 | f = list_first_entry(&pd->farewell_list, | |
945 | struct oz_farewell, link); | |
946 | list_del(&f->link); | |
947 | oz_polling_unlock_bh(); | |
948 | if (ai->farewell) | |
949 | ai->farewell(pd, f->ep_num, f->report, f->len); | |
1ec41a31 | 950 | kfree(f); |
bc3157dd CK |
951 | } |
952 | } |