Commit | Line | Data |
---|---|---|
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 | |
27 | /* Maximum number of uncompleted isoc frames that can be pending. | |
28 | */ | |
29 | #define OZ_MAX_SUBMITTED_ISOC 16 | |
30 | /*------------------------------------------------------------------------------ | |
31 | */ | |
32 | static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd); | |
33 | static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f); | |
34 | static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f); | |
35 | static int oz_send_isoc_frame(struct oz_pd *pd); | |
36 | static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f); | |
37 | static void oz_isoc_stream_free(struct oz_isoc_stream *st); | |
38 | static int oz_send_next_queued_frame(struct oz_pd *pd, int *more_data); | |
39 | static void oz_isoc_destructor(struct sk_buff *skb); | |
40 | static int oz_def_app_init(void); | |
41 | static void oz_def_app_term(void); | |
42 | static int oz_def_app_start(struct oz_pd *pd, int resume); | |
43 | static void oz_def_app_stop(struct oz_pd *pd, int pause); | |
44 | static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt); | |
45 | /*------------------------------------------------------------------------------ | |
46 | * Counts the uncompleted isoc frames submitted to netcard. | |
47 | */ | |
48 | static atomic_t g_submitted_isoc = ATOMIC_INIT(0); | |
49 | /* Application handler functions. | |
50 | */ | |
51 | static struct oz_app_if g_app_if[OZ_APPID_MAX] = { | |
52 | {oz_usb_init, | |
53 | oz_usb_term, | |
54 | oz_usb_start, | |
55 | oz_usb_stop, | |
56 | oz_usb_rx, | |
57 | oz_usb_heartbeat, | |
58 | oz_usb_farewell, | |
59 | OZ_APPID_USB}, | |
60 | ||
61 | {oz_def_app_init, | |
62 | oz_def_app_term, | |
63 | oz_def_app_start, | |
64 | oz_def_app_stop, | |
65 | oz_def_app_rx, | |
66 | 0, | |
67 | 0, | |
68 | OZ_APPID_UNUSED1}, | |
69 | ||
70 | {oz_def_app_init, | |
71 | oz_def_app_term, | |
72 | oz_def_app_start, | |
73 | oz_def_app_stop, | |
74 | oz_def_app_rx, | |
75 | 0, | |
76 | 0, | |
77 | OZ_APPID_UNUSED2}, | |
78 | ||
79 | {oz_cdev_init, | |
80 | oz_cdev_term, | |
81 | oz_cdev_start, | |
82 | oz_cdev_stop, | |
83 | oz_cdev_rx, | |
84 | 0, | |
85 | 0, | |
86 | OZ_APPID_SERIAL}, | |
87 | }; | |
88 | /*------------------------------------------------------------------------------ | |
89 | * Context: process | |
90 | */ | |
91 | static int oz_def_app_init(void) | |
92 | { | |
93 | return 0; | |
94 | } | |
95 | /*------------------------------------------------------------------------------ | |
96 | * Context: process | |
97 | */ | |
98 | static void oz_def_app_term(void) | |
99 | { | |
100 | } | |
101 | /*------------------------------------------------------------------------------ | |
102 | * Context: softirq | |
103 | */ | |
104 | static int oz_def_app_start(struct oz_pd *pd, int resume) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | /*------------------------------------------------------------------------------ | |
109 | * Context: softirq | |
110 | */ | |
111 | static void oz_def_app_stop(struct oz_pd *pd, int pause) | |
112 | { | |
113 | } | |
114 | /*------------------------------------------------------------------------------ | |
115 | * Context: softirq | |
116 | */ | |
117 | static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt) | |
118 | { | |
119 | } | |
120 | /*------------------------------------------------------------------------------ | |
121 | * Context: softirq or process | |
122 | */ | |
123 | void oz_pd_set_state(struct oz_pd *pd, unsigned state) | |
124 | { | |
125 | pd->state = state; | |
126 | oz_event_log(OZ_EVT_PD_STATE, 0, 0, 0, state); | |
127 | #ifdef WANT_TRACE | |
128 | switch (state) { | |
129 | case OZ_PD_S_IDLE: | |
130 | oz_trace("PD State: OZ_PD_S_IDLE\n"); | |
131 | break; | |
132 | case OZ_PD_S_CONNECTED: | |
133 | oz_trace("PD State: OZ_PD_S_CONNECTED\n"); | |
134 | break; | |
135 | case OZ_PD_S_STOPPED: | |
136 | oz_trace("PD State: OZ_PD_S_STOPPED\n"); | |
137 | break; | |
138 | case OZ_PD_S_SLEEP: | |
139 | oz_trace("PD State: OZ_PD_S_SLEEP\n"); | |
140 | break; | |
141 | } | |
142 | #endif /* WANT_TRACE */ | |
143 | } | |
144 | /*------------------------------------------------------------------------------ | |
145 | * Context: softirq or process | |
146 | */ | |
147 | void oz_pd_get(struct oz_pd *pd) | |
148 | { | |
149 | atomic_inc(&pd->ref_count); | |
150 | } | |
151 | /*------------------------------------------------------------------------------ | |
152 | * Context: softirq or process | |
153 | */ | |
154 | void oz_pd_put(struct oz_pd *pd) | |
155 | { | |
156 | if (atomic_dec_and_test(&pd->ref_count)) | |
157 | oz_pd_destroy(pd); | |
158 | } | |
159 | /*------------------------------------------------------------------------------ | |
160 | * Context: softirq-serialized | |
161 | */ | |
162 | struct oz_pd *oz_pd_alloc(u8 *mac_addr) | |
163 | { | |
1ec41a31 | 164 | struct oz_pd *pd = kzalloc(sizeof(struct oz_pd), GFP_ATOMIC); |
bc3157dd CK |
165 | if (pd) { |
166 | int i; | |
bc3157dd CK |
167 | atomic_set(&pd->ref_count, 2); |
168 | for (i = 0; i < OZ_APPID_MAX; i++) | |
169 | spin_lock_init(&pd->app_lock[i]); | |
170 | pd->last_rx_pkt_num = 0xffffffff; | |
171 | oz_pd_set_state(pd, OZ_PD_S_IDLE); | |
172 | pd->max_tx_size = OZ_MAX_TX_SIZE; | |
173 | memcpy(pd->mac_addr, mac_addr, ETH_ALEN); | |
174 | if (0 != oz_elt_buf_init(&pd->elt_buff)) { | |
1ec41a31 | 175 | kfree(pd); |
bc3157dd CK |
176 | pd = 0; |
177 | } | |
178 | spin_lock_init(&pd->tx_frame_lock); | |
179 | INIT_LIST_HEAD(&pd->tx_queue); | |
180 | INIT_LIST_HEAD(&pd->farewell_list); | |
181 | pd->last_sent_frame = &pd->tx_queue; | |
182 | spin_lock_init(&pd->stream_lock); | |
183 | INIT_LIST_HEAD(&pd->stream_list); | |
184 | } | |
185 | return pd; | |
186 | } | |
187 | /*------------------------------------------------------------------------------ | |
188 | * Context: softirq or process | |
189 | */ | |
190 | void oz_pd_destroy(struct oz_pd *pd) | |
191 | { | |
192 | struct list_head *e; | |
193 | struct oz_tx_frame *f; | |
194 | struct oz_isoc_stream *st; | |
195 | struct oz_farewell *fwell; | |
196 | oz_trace("Destroying PD\n"); | |
197 | /* Delete any streams. | |
198 | */ | |
199 | e = pd->stream_list.next; | |
200 | while (e != &pd->stream_list) { | |
201 | st = container_of(e, struct oz_isoc_stream, link); | |
202 | e = e->next; | |
203 | oz_isoc_stream_free(st); | |
204 | } | |
205 | /* Free any queued tx frames. | |
206 | */ | |
207 | e = pd->tx_queue.next; | |
208 | while (e != &pd->tx_queue) { | |
209 | f = container_of(e, struct oz_tx_frame, link); | |
210 | e = e->next; | |
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 | } | |
375 | /*------------------------------------------------------------------------------ | |
376 | * Context: softirq or process | |
377 | */ | |
378 | static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f) | |
379 | { | |
380 | spin_lock_bh(&pd->tx_frame_lock); | |
381 | if (pd->tx_pool_count < OZ_MAX_TX_POOL_SIZE) { | |
382 | f->link.next = pd->tx_pool; | |
383 | pd->tx_pool = &f->link; | |
384 | pd->tx_pool_count++; | |
385 | f = 0; | |
bc3157dd CK |
386 | } |
387 | spin_unlock_bh(&pd->tx_frame_lock); | |
388 | if (f) | |
1ec41a31 | 389 | kfree(f); |
bc3157dd CK |
390 | } |
391 | /*------------------------------------------------------------------------------ | |
392 | * Context: softirq | |
393 | */ | |
394 | int oz_prepare_frame(struct oz_pd *pd, int empty) | |
395 | { | |
396 | struct oz_tx_frame *f; | |
397 | if ((pd->mode & OZ_MODE_MASK) != OZ_MODE_TRIGGERED) | |
398 | return -1; | |
399 | if (pd->nb_queued_frames >= OZ_MAX_QUEUED_FRAMES) | |
400 | return -1; | |
401 | if (!empty && !oz_are_elts_available(&pd->elt_buff)) | |
402 | return -1; | |
403 | f = oz_tx_frame_alloc(pd); | |
404 | if (f == 0) | |
405 | return -1; | |
406 | f->hdr.control = | |
407 | (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ACK_REQUESTED; | |
408 | ++pd->last_tx_pkt_num; | |
409 | put_unaligned(cpu_to_le32(pd->last_tx_pkt_num), &f->hdr.pkt_num); | |
410 | if (empty == 0) { | |
411 | oz_select_elts_for_tx(&pd->elt_buff, 0, &f->total_size, | |
412 | pd->max_tx_size, &f->elt_list); | |
413 | } | |
414 | spin_lock(&pd->tx_frame_lock); | |
415 | list_add_tail(&f->link, &pd->tx_queue); | |
416 | pd->nb_queued_frames++; | |
417 | spin_unlock(&pd->tx_frame_lock); | |
418 | return 0; | |
419 | } | |
420 | /*------------------------------------------------------------------------------ | |
421 | * Context: softirq-serialized | |
422 | */ | |
423 | static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f) | |
424 | { | |
425 | struct sk_buff *skb = 0; | |
426 | struct net_device *dev = pd->net_dev; | |
427 | struct oz_hdr *oz_hdr; | |
428 | struct oz_elt *elt; | |
429 | struct list_head *e; | |
430 | /* Allocate skb with enough space for the lower layers as well | |
431 | * as the space we need. | |
432 | */ | |
433 | skb = alloc_skb(f->total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC); | |
434 | if (skb == 0) | |
435 | return 0; | |
436 | /* Reserve the head room for lower layers. | |
437 | */ | |
438 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
439 | skb_reset_network_header(skb); | |
440 | skb->dev = dev; | |
441 | skb->protocol = htons(OZ_ETHERTYPE); | |
442 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
443 | dev->dev_addr, skb->len) < 0) | |
444 | goto fail; | |
445 | /* Push the tail to the end of the area we are going to copy to. | |
446 | */ | |
447 | oz_hdr = (struct oz_hdr *)skb_put(skb, f->total_size); | |
448 | f->hdr.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
449 | memcpy(oz_hdr, &f->hdr, sizeof(struct oz_hdr)); | |
450 | /* Copy the elements into the frame body. | |
451 | */ | |
452 | elt = (struct oz_elt *)(oz_hdr+1); | |
453 | for (e = f->elt_list.next; e != &f->elt_list; e = e->next) { | |
454 | struct oz_elt_info *ei; | |
455 | ei = container_of(e, struct oz_elt_info, link); | |
456 | memcpy(elt, ei->data, ei->length); | |
457 | elt = oz_next_elt(elt); | |
458 | } | |
459 | return skb; | |
460 | fail: | |
461 | kfree_skb(skb); | |
462 | return 0; | |
463 | } | |
464 | /*------------------------------------------------------------------------------ | |
465 | * Context: softirq or process | |
466 | */ | |
467 | static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f) | |
468 | { | |
469 | struct list_head *e; | |
470 | struct oz_elt_info *ei; | |
471 | e = f->elt_list.next; | |
472 | while (e != &f->elt_list) { | |
473 | ei = container_of(e, struct oz_elt_info, link); | |
474 | e = e->next; | |
475 | list_del_init(&ei->link); | |
476 | if (ei->callback) | |
477 | ei->callback(pd, ei->context); | |
478 | spin_lock_bh(&pd->elt_buff.lock); | |
479 | oz_elt_info_free(&pd->elt_buff, ei); | |
480 | spin_unlock_bh(&pd->elt_buff.lock); | |
481 | } | |
482 | oz_tx_frame_free(pd, f); | |
483 | if (pd->elt_buff.free_elts > pd->elt_buff.max_free_elts) | |
484 | oz_trim_elt_pool(&pd->elt_buff); | |
485 | } | |
486 | /*------------------------------------------------------------------------------ | |
487 | * Context: softirq-serialized | |
488 | */ | |
489 | static int oz_send_next_queued_frame(struct oz_pd *pd, int *more_data) | |
490 | { | |
491 | struct sk_buff *skb; | |
492 | struct oz_tx_frame *f; | |
493 | struct list_head *e; | |
494 | *more_data = 0; | |
495 | spin_lock(&pd->tx_frame_lock); | |
496 | e = pd->last_sent_frame->next; | |
497 | if (e == &pd->tx_queue) { | |
498 | spin_unlock(&pd->tx_frame_lock); | |
499 | return -1; | |
500 | } | |
501 | pd->last_sent_frame = e; | |
502 | if (e->next != &pd->tx_queue) | |
503 | *more_data = 1; | |
504 | f = container_of(e, struct oz_tx_frame, link); | |
505 | skb = oz_build_frame(pd, f); | |
506 | spin_unlock(&pd->tx_frame_lock); | |
507 | oz_trace2(OZ_TRACE_TX_FRAMES, "TX frame PN=0x%x\n", f->hdr.pkt_num); | |
508 | if (skb) { | |
509 | oz_event_log(OZ_EVT_TX_FRAME, | |
510 | 0, | |
511 | (((u16)f->hdr.control)<<8)|f->hdr.last_pkt_num, | |
512 | 0, f->hdr.pkt_num); | |
513 | if (dev_queue_xmit(skb) < 0) | |
514 | return -1; | |
515 | } | |
516 | return 0; | |
517 | } | |
518 | /*------------------------------------------------------------------------------ | |
519 | * Context: softirq-serialized | |
520 | */ | |
521 | void oz_send_queued_frames(struct oz_pd *pd, int backlog) | |
522 | { | |
523 | int more; | |
524 | if (backlog < OZ_MAX_QUEUED_FRAMES) { | |
525 | if (oz_send_next_queued_frame(pd, &more) >= 0) { | |
526 | while (more && oz_send_next_queued_frame(pd, &more)) | |
527 | ; | |
528 | } else { | |
529 | if (((pd->mode & OZ_F_ISOC_ANYTIME) == 0) | |
530 | || (pd->isoc_sent == 0)) { | |
531 | if (oz_prepare_frame(pd, 1) >= 0) | |
532 | oz_send_next_queued_frame(pd, &more); | |
533 | } | |
534 | } | |
535 | } else { | |
536 | oz_send_next_queued_frame(pd, &more); | |
537 | } | |
538 | } | |
539 | /*------------------------------------------------------------------------------ | |
540 | * Context: softirq | |
541 | */ | |
542 | static int oz_send_isoc_frame(struct oz_pd *pd) | |
543 | { | |
544 | struct sk_buff *skb = 0; | |
545 | struct net_device *dev = pd->net_dev; | |
546 | struct oz_hdr *oz_hdr; | |
547 | struct oz_elt *elt; | |
548 | struct list_head *e; | |
549 | struct list_head list; | |
550 | int total_size = sizeof(struct oz_hdr); | |
551 | INIT_LIST_HEAD(&list); | |
552 | ||
553 | oz_select_elts_for_tx(&pd->elt_buff, 1, &total_size, | |
554 | pd->max_tx_size, &list); | |
555 | if (list.next == &list) | |
556 | return 0; | |
557 | skb = alloc_skb(total_size + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC); | |
558 | if (skb == 0) { | |
559 | oz_trace("Cannot alloc skb\n"); | |
560 | oz_elt_info_free_chain(&pd->elt_buff, &list); | |
561 | return -1; | |
562 | } | |
563 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
564 | skb_reset_network_header(skb); | |
565 | skb->dev = dev; | |
566 | skb->protocol = htons(OZ_ETHERTYPE); | |
567 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
568 | dev->dev_addr, skb->len) < 0) { | |
569 | kfree_skb(skb); | |
570 | return -1; | |
571 | } | |
572 | oz_hdr = (struct oz_hdr *)skb_put(skb, total_size); | |
573 | oz_hdr->control = (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC; | |
574 | oz_hdr->last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
575 | elt = (struct oz_elt *)(oz_hdr+1); | |
576 | ||
577 | for (e = list.next; e != &list; e = e->next) { | |
578 | struct oz_elt_info *ei; | |
579 | ei = container_of(e, struct oz_elt_info, link); | |
580 | memcpy(elt, ei->data, ei->length); | |
581 | elt = oz_next_elt(elt); | |
582 | } | |
583 | oz_event_log(OZ_EVT_TX_ISOC, 0, 0, 0, 0); | |
584 | dev_queue_xmit(skb); | |
585 | oz_elt_info_free_chain(&pd->elt_buff, &list); | |
586 | return 0; | |
587 | } | |
588 | /*------------------------------------------------------------------------------ | |
589 | * Context: softirq-serialized | |
590 | */ | |
591 | void oz_retire_tx_frames(struct oz_pd *pd, u8 lpn) | |
592 | { | |
593 | struct list_head *e; | |
594 | struct oz_tx_frame *f; | |
595 | struct list_head *first = 0; | |
596 | struct list_head *last = 0; | |
597 | u8 diff; | |
598 | u32 pkt_num; | |
599 | ||
600 | spin_lock(&pd->tx_frame_lock); | |
601 | e = pd->tx_queue.next; | |
602 | while (e != &pd->tx_queue) { | |
603 | f = container_of(e, struct oz_tx_frame, link); | |
604 | pkt_num = le32_to_cpu(get_unaligned(&f->hdr.pkt_num)); | |
605 | diff = (lpn - (pkt_num & OZ_LAST_PN_MASK)) & OZ_LAST_PN_MASK; | |
606 | if (diff > OZ_LAST_PN_HALF_CYCLE) | |
607 | break; | |
608 | if (first == 0) | |
609 | first = e; | |
610 | last = e; | |
611 | e = e->next; | |
612 | pd->nb_queued_frames--; | |
613 | } | |
614 | if (first) { | |
615 | last->next->prev = &pd->tx_queue; | |
616 | pd->tx_queue.next = last->next; | |
617 | last->next = 0; | |
618 | } | |
619 | pd->last_sent_frame = &pd->tx_queue; | |
620 | spin_unlock(&pd->tx_frame_lock); | |
621 | while (first) { | |
622 | f = container_of(first, struct oz_tx_frame, link); | |
623 | first = first->next; | |
624 | oz_retire_frame(pd, f); | |
625 | } | |
626 | } | |
627 | /*------------------------------------------------------------------------------ | |
628 | * Precondition: stream_lock must be held. | |
629 | * Context: softirq | |
630 | */ | |
631 | static struct oz_isoc_stream *pd_stream_find(struct oz_pd *pd, u8 ep_num) | |
632 | { | |
633 | struct list_head *e; | |
634 | struct oz_isoc_stream *st; | |
635 | list_for_each(e, &pd->stream_list) { | |
636 | st = container_of(e, struct oz_isoc_stream, link); | |
637 | if (st->ep_num == ep_num) | |
638 | return st; | |
639 | } | |
640 | return 0; | |
641 | } | |
642 | /*------------------------------------------------------------------------------ | |
643 | * Context: softirq | |
644 | */ | |
645 | int oz_isoc_stream_create(struct oz_pd *pd, u8 ep_num) | |
646 | { | |
647 | struct oz_isoc_stream *st = | |
1ec41a31 | 648 | kzalloc(sizeof(struct oz_isoc_stream), GFP_ATOMIC); |
bc3157dd | 649 | if (!st) |
1ec41a31 | 650 | return -ENOMEM; |
bc3157dd CK |
651 | st->ep_num = ep_num; |
652 | spin_lock_bh(&pd->stream_lock); | |
653 | if (!pd_stream_find(pd, ep_num)) { | |
654 | list_add(&st->link, &pd->stream_list); | |
655 | st = 0; | |
656 | } | |
657 | spin_unlock_bh(&pd->stream_lock); | |
658 | if (st) | |
1ec41a31 | 659 | kfree(st); |
bc3157dd CK |
660 | return 0; |
661 | } | |
662 | /*------------------------------------------------------------------------------ | |
663 | * Context: softirq or process | |
664 | */ | |
665 | static void oz_isoc_stream_free(struct oz_isoc_stream *st) | |
666 | { | |
667 | if (st->skb) | |
668 | kfree_skb(st->skb); | |
1ec41a31 | 669 | kfree(st); |
bc3157dd CK |
670 | } |
671 | /*------------------------------------------------------------------------------ | |
672 | * Context: softirq | |
673 | */ | |
674 | int oz_isoc_stream_delete(struct oz_pd *pd, u8 ep_num) | |
675 | { | |
676 | struct oz_isoc_stream *st; | |
677 | spin_lock_bh(&pd->stream_lock); | |
678 | st = pd_stream_find(pd, ep_num); | |
679 | if (st) | |
680 | list_del(&st->link); | |
681 | spin_unlock_bh(&pd->stream_lock); | |
682 | if (st) | |
683 | oz_isoc_stream_free(st); | |
684 | return 0; | |
685 | } | |
686 | /*------------------------------------------------------------------------------ | |
687 | * Context: any | |
688 | */ | |
689 | static void oz_isoc_destructor(struct sk_buff *skb) | |
690 | { | |
691 | atomic_dec(&g_submitted_isoc); | |
692 | oz_event_log(OZ_EVT_TX_ISOC_DONE, atomic_read(&g_submitted_isoc), | |
693 | 0, skb, 0); | |
694 | } | |
695 | /*------------------------------------------------------------------------------ | |
696 | * Context: softirq | |
697 | */ | |
698 | int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, u8 *data, int len) | |
699 | { | |
700 | struct net_device *dev = pd->net_dev; | |
701 | struct oz_isoc_stream *st; | |
702 | u8 nb_units = 0; | |
703 | struct sk_buff *skb = 0; | |
704 | struct oz_hdr *oz_hdr = 0; | |
705 | int size = 0; | |
706 | spin_lock_bh(&pd->stream_lock); | |
707 | st = pd_stream_find(pd, ep_num); | |
708 | if (st) { | |
709 | skb = st->skb; | |
710 | st->skb = 0; | |
711 | nb_units = st->nb_units; | |
712 | st->nb_units = 0; | |
713 | oz_hdr = st->oz_hdr; | |
714 | size = st->size; | |
715 | } | |
716 | spin_unlock_bh(&pd->stream_lock); | |
717 | if (!st) | |
718 | return 0; | |
719 | if (!skb) { | |
720 | /* Allocate enough space for max size frame. */ | |
721 | skb = alloc_skb(pd->max_tx_size + OZ_ALLOCATED_SPACE(dev), | |
722 | GFP_ATOMIC); | |
723 | if (skb == 0) | |
724 | return 0; | |
725 | /* Reserve the head room for lower layers. */ | |
726 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
727 | skb_reset_network_header(skb); | |
728 | skb->dev = dev; | |
729 | skb->protocol = htons(OZ_ETHERTYPE); | |
730 | size = sizeof(struct oz_hdr) + sizeof(struct oz_isoc_large); | |
731 | oz_hdr = (struct oz_hdr *)skb_put(skb, size); | |
732 | } | |
733 | memcpy(skb_put(skb, len), data, len); | |
734 | size += len; | |
735 | if (++nb_units < pd->ms_per_isoc) { | |
736 | spin_lock_bh(&pd->stream_lock); | |
737 | st->skb = skb; | |
738 | st->nb_units = nb_units; | |
739 | st->oz_hdr = oz_hdr; | |
740 | st->size = size; | |
741 | spin_unlock_bh(&pd->stream_lock); | |
742 | } else { | |
743 | struct oz_hdr oz; | |
744 | struct oz_isoc_large iso; | |
745 | spin_lock_bh(&pd->stream_lock); | |
746 | iso.frame_number = st->frame_num; | |
747 | st->frame_num += nb_units; | |
748 | spin_unlock_bh(&pd->stream_lock); | |
749 | oz.control = | |
750 | (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ISOC; | |
751 | oz.last_pkt_num = pd->trigger_pkt_num & OZ_LAST_PN_MASK; | |
752 | oz.pkt_num = 0; | |
753 | iso.endpoint = ep_num; | |
754 | iso.format = OZ_DATA_F_ISOC_LARGE; | |
755 | iso.ms_data = nb_units; | |
756 | memcpy(oz_hdr, &oz, sizeof(oz)); | |
757 | memcpy(oz_hdr+1, &iso, sizeof(iso)); | |
758 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, | |
759 | dev->dev_addr, skb->len) < 0) { | |
760 | kfree_skb(skb); | |
761 | return -1; | |
762 | } | |
763 | if (atomic_read(&g_submitted_isoc) < OZ_MAX_SUBMITTED_ISOC) { | |
764 | skb->destructor = oz_isoc_destructor; | |
765 | atomic_inc(&g_submitted_isoc); | |
766 | oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number, | |
767 | skb, atomic_read(&g_submitted_isoc)); | |
768 | if (dev_queue_xmit(skb) < 0) | |
769 | return -1; | |
770 | } else { | |
771 | oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); | |
772 | kfree_skb(skb); | |
773 | } | |
774 | } | |
775 | return 0; | |
776 | } | |
777 | /*------------------------------------------------------------------------------ | |
778 | * Context: process | |
779 | */ | |
780 | void oz_apps_init(void) | |
781 | { | |
782 | int i; | |
783 | for (i = 0; i < OZ_APPID_MAX; i++) | |
784 | if (g_app_if[i].init) | |
785 | g_app_if[i].init(); | |
786 | } | |
787 | /*------------------------------------------------------------------------------ | |
788 | * Context: process | |
789 | */ | |
790 | void oz_apps_term(void) | |
791 | { | |
792 | int i; | |
793 | /* Terminate all the apps. */ | |
794 | for (i = 0; i < OZ_APPID_MAX; i++) | |
795 | if (g_app_if[i].term) | |
796 | g_app_if[i].term(); | |
797 | } | |
798 | /*------------------------------------------------------------------------------ | |
799 | * Context: softirq-serialized | |
800 | */ | |
801 | void oz_handle_app_elt(struct oz_pd *pd, u8 app_id, struct oz_elt *elt) | |
802 | { | |
803 | struct oz_app_if *ai; | |
92a62532 | 804 | if (app_id == 0 || app_id > OZ_APPID_MAX) |
bc3157dd CK |
805 | return; |
806 | ai = &g_app_if[app_id-1]; | |
807 | ai->rx(pd, elt); | |
808 | } | |
809 | /*------------------------------------------------------------------------------ | |
810 | * Context: softirq or process | |
811 | */ | |
812 | void oz_pd_indicate_farewells(struct oz_pd *pd) | |
813 | { | |
814 | struct oz_farewell *f; | |
815 | struct oz_app_if *ai = &g_app_if[OZ_APPID_USB-1]; | |
816 | while (1) { | |
817 | oz_polling_lock_bh(); | |
818 | if (list_empty(&pd->farewell_list)) { | |
819 | oz_polling_unlock_bh(); | |
820 | break; | |
821 | } | |
822 | f = list_first_entry(&pd->farewell_list, | |
823 | struct oz_farewell, link); | |
824 | list_del(&f->link); | |
825 | oz_polling_unlock_bh(); | |
826 | if (ai->farewell) | |
827 | ai->farewell(pd, f->ep_num, f->report, f->len); | |
1ec41a31 | 828 | kfree(f); |
bc3157dd CK |
829 | } |
830 | } |