1 /*
2 * cx18 mailbox functions
3 *
4 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
5 * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 * 02111-1307 USA
21 */
22
23 #include <stdarg.h>
24
25 #include "cx18-driver.h"
26 #include "cx18-io.h"
27 #include "cx18-scb.h"
28 #include "cx18-irq.h"
29 #include "cx18-mailbox.h"
30 #include "cx18-queue.h"
31 #include "cx18-streams.h"
32 #include "cx18-alsa-pcm.h" /* FIXME make configurable */
33
34 static const char *rpu_str[] = { "APU", "CPU", "EPU", "HPU" };
35
36 #define API_FAST (1 << 2) /* Short timeout */
37 #define API_SLOW (1 << 3) /* Additional 300ms timeout */
38
39 struct cx18_api_info {
40 u32 cmd;
41 u8 flags; /* Flags, see above */
42 u8 rpu; /* Processing unit */
43 const char *name; /* The name of the command */
44 };
45
46 #define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x }
47
48 static const struct cx18_api_info api_info[] = {
49 /* MPEG encoder API */
50 API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0),
51 API_ENTRY(CPU, CX18_EPU_DEBUG, 0),
52 API_ENTRY(CPU, CX18_CREATE_TASK, 0),
53 API_ENTRY(CPU, CX18_DESTROY_TASK, 0),
54 API_ENTRY(CPU, CX18_CPU_CAPTURE_START, API_SLOW),
55 API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP, API_SLOW),
56 API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE, 0),
57 API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME, 0),
58 API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0),
59 API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 0),
60 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN, 0),
61 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE, 0),
62 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION, 0),
63 API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM, 0),
64 API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 0),
65 API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING, 0),
66 API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE, 0),
67 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS, 0),
68 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE, 0),
69 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE, 0),
70 API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS, 0),
71 API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM, API_SLOW),
72 API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO, 0),
73 API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT, 0),
74 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID, 0),
75 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID, 0),
76 API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE, 0),
77 API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE, 0),
78 API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION, 0),
79 API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO, 0),
80 API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME, 0),
81 API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM, 0),
82 API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER, 0),
83 API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS, 0),
84 API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK, 0),
85 API_ENTRY(CPU, CX18_CPU_DE_SET_MDL, API_FAST),
86 API_ENTRY(CPU, CX18_CPU_DE_RELEASE_MDL, API_SLOW),
87 API_ENTRY(APU, CX18_APU_START, 0),
88 API_ENTRY(APU, CX18_APU_STOP, 0),
89 API_ENTRY(APU, CX18_APU_RESETAI, 0),
90 API_ENTRY(CPU, CX18_CPU_DEBUG_PEEK32, 0),
91 API_ENTRY(0, 0, 0),
92 };
93
find_api_info(u32 cmd)94 static const struct cx18_api_info *find_api_info(u32 cmd)
95 {
96 int i;
97
98 for (i = 0; api_info[i].cmd; i++)
99 if (api_info[i].cmd == cmd)
100 return &api_info[i];
101 return NULL;
102 }
103
104 /* Call with buf of n*11+1 bytes */
u32arr2hex(u32 data[],int n,char * buf)105 static char *u32arr2hex(u32 data[], int n, char *buf)
106 {
107 char *p;
108 int i;
109
110 for (i = 0, p = buf; i < n; i++, p += 11) {
111 /* kernel snprintf() appends '\0' always */
112 snprintf(p, 12, " %#010x", data[i]);
113 }
114 *p = '\0';
115 return buf;
116 }
117
dump_mb(struct cx18 * cx,struct cx18_mailbox * mb,char * name)118 static void dump_mb(struct cx18 *cx, struct cx18_mailbox *mb, char *name)
119 {
120 char argstr[MAX_MB_ARGUMENTS*11+1];
121
122 if (!(cx18_debug & CX18_DBGFLG_API))
123 return;
124
125 CX18_DEBUG_API("%s: req %#010x ack %#010x cmd %#010x err %#010x args%s"
126 "\n", name, mb->request, mb->ack, mb->cmd, mb->error,
127 u32arr2hex(mb->args, MAX_MB_ARGUMENTS, argstr));
128 }
129
130
131 /*
132 * Functions that run in a work_queue work handling context
133 */
134
cx18_mdl_send_to_dvb(struct cx18_stream * s,struct cx18_mdl * mdl)135 static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl)
136 {
137 struct cx18_buffer *buf;
138
139 if (s->dvb == NULL || !s->dvb->enabled || mdl->bytesused == 0)
140 return;
141
142 /* We ignore mdl and buf readpos accounting here - it doesn't matter */
143
144 /* The likely case */
145 if (list_is_singular(&mdl->buf_list)) {
146 buf = list_first_entry(&mdl->buf_list, struct cx18_buffer,
147 list);
148 if (buf->bytesused)
149 dvb_dmx_swfilter(&s->dvb->demux,
150 buf->buf, buf->bytesused);
151 return;
152 }
153
154 list_for_each_entry(buf, &mdl->buf_list, list) {
155 if (buf->bytesused == 0)
156 break;
157 dvb_dmx_swfilter(&s->dvb->demux, buf->buf, buf->bytesused);
158 }
159 }
160
161
cx18_mdl_send_to_alsa(struct cx18 * cx,struct cx18_stream * s,struct cx18_mdl * mdl)162 static void cx18_mdl_send_to_alsa(struct cx18 *cx, struct cx18_stream *s,
163 struct cx18_mdl *mdl)
164 {
165 struct cx18_buffer *buf;
166
167 if (mdl->bytesused == 0)
168 return;
169
170 /* We ignore mdl and buf readpos accounting here - it doesn't matter */
171
172 /* The likely case */
173 if (list_is_singular(&mdl->buf_list)) {
174 buf = list_first_entry(&mdl->buf_list, struct cx18_buffer,
175 list);
176 if (buf->bytesused)
177 cx->pcm_announce_callback(cx->alsa, buf->buf,
178 buf->bytesused);
179 return;
180 }
181
182 list_for_each_entry(buf, &mdl->buf_list, list) {
183 if (buf->bytesused == 0)
184 break;
185 cx->pcm_announce_callback(cx->alsa, buf->buf, buf->bytesused);
186 }
187 }
188
epu_dma_done(struct cx18 * cx,struct cx18_in_work_order * order)189 static void epu_dma_done(struct cx18 *cx, struct cx18_in_work_order *order)
190 {
191 u32 handle, mdl_ack_count, id;
192 struct cx18_mailbox *mb;
193 struct cx18_mdl_ack *mdl_ack;
194 struct cx18_stream *s;
195 struct cx18_mdl *mdl;
196 int i;
197
198 mb = &order->mb;
199 handle = mb->args[0];
200 s = cx18_handle_to_stream(cx, handle);
201
202 if (s == NULL) {
203 CX18_WARN("Got DMA done notification for unknown/inactive"
204 " handle %d, %s mailbox seq no %d\n", handle,
205 (order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) ?
206 "stale" : "good", mb->request);
207 return;
208 }
209
210 mdl_ack_count = mb->args[2];
211 mdl_ack = order->mdl_ack;
212 for (i = 0; i < mdl_ack_count; i++, mdl_ack++) {
213 id = mdl_ack->id;
214 /*
215 * Simple integrity check for processing a stale (and possibly
216 * inconsistent mailbox): make sure the MDL id is in the
217 * valid range for the stream.
218 *
219 * We go through the trouble of dealing with stale mailboxes
220 * because most of the time, the mailbox data is still valid and
221 * unchanged (and in practice the firmware ping-pongs the
222 * two mdl_ack buffers so mdl_acks are not stale).
223 *
224 * There are occasions when we get a half changed mailbox,
225 * which this check catches for a handle & id mismatch. If the
226 * handle and id do correspond, the worst case is that we
227 * completely lost the old MDL, but pick up the new MDL
228 * early (but the new mdl_ack is guaranteed to be good in this
229 * case as the firmware wouldn't point us to a new mdl_ack until
230 * it's filled in).
231 *
232 * cx18_queue_get_mdl() will detect the lost MDLs
233 * and send them back to q_free for fw rotation eventually.
234 */
235 if ((order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) &&
236 !(id >= s->mdl_base_idx &&
237 id < (s->mdl_base_idx + s->buffers))) {
238 CX18_WARN("Fell behind! Ignoring stale mailbox with "
239 " inconsistent data. Lost MDL for mailbox "
240 "seq no %d\n", mb->request);
241 break;
242 }
243 mdl = cx18_queue_get_mdl(s, id, mdl_ack->data_used);
244
245 CX18_DEBUG_HI_DMA("DMA DONE for %s (MDL %d)\n", s->name, id);
246 if (mdl == NULL) {
247 CX18_WARN("Could not find MDL %d for stream %s\n",
248 id, s->name);
249 continue;
250 }
251
252 CX18_DEBUG_HI_DMA("%s recv bytesused = %d\n",
253 s->name, mdl->bytesused);
254
255 if (s->type == CX18_ENC_STREAM_TYPE_TS) {
256 cx18_mdl_send_to_dvb(s, mdl);
257 cx18_enqueue(s, mdl, &s->q_free);
258 } else if (s->type == CX18_ENC_STREAM_TYPE_PCM) {
259 /* Pass the data to cx18-alsa */
260 if (cx->pcm_announce_callback != NULL) {
261 cx18_mdl_send_to_alsa(cx, s, mdl);
262 cx18_enqueue(s, mdl, &s->q_free);
263 } else {
264 cx18_enqueue(s, mdl, &s->q_full);
265 }
266 } else {
267 cx18_enqueue(s, mdl, &s->q_full);
268 if (s->type == CX18_ENC_STREAM_TYPE_IDX)
269 cx18_stream_rotate_idx_mdls(cx);
270 }
271 }
272 /* Put as many MDLs as possible back into fw use */
273 cx18_stream_load_fw_queue(s);
274
275 wake_up(&cx->dma_waitq);
276 if (s->id != -1)
277 wake_up(&s->waitq);
278 }
279
epu_debug(struct cx18 * cx,struct cx18_in_work_order * order)280 static void epu_debug(struct cx18 *cx, struct cx18_in_work_order *order)
281 {
282 char *p;
283 char *str = order->str;
284
285 CX18_DEBUG_INFO("%x %s\n", order->mb.args[0], str);
286 p = strchr(str, '.');
287 if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags) && p && p > str)
288 CX18_INFO("FW version: %s\n", p - 1);
289 }
290
epu_cmd(struct cx18 * cx,struct cx18_in_work_order * order)291 static void epu_cmd(struct cx18 *cx, struct cx18_in_work_order *order)
292 {
293 switch (order->rpu) {
294 case CPU:
295 {
296 switch (order->mb.cmd) {
297 case CX18_EPU_DMA_DONE:
298 epu_dma_done(cx, order);
299 break;
300 case CX18_EPU_DEBUG:
301 epu_debug(cx, order);
302 break;
303 default:
304 CX18_WARN("Unknown CPU to EPU mailbox command %#0x\n",
305 order->mb.cmd);
306 break;
307 }
308 break;
309 }
310 case APU:
311 CX18_WARN("Unknown APU to EPU mailbox command %#0x\n",
312 order->mb.cmd);
313 break;
314 default:
315 break;
316 }
317 }
318
319 static
free_in_work_order(struct cx18 * cx,struct cx18_in_work_order * order)320 void free_in_work_order(struct cx18 *cx, struct cx18_in_work_order *order)
321 {
322 atomic_set(&order->pending, 0);
323 }
324
cx18_in_work_handler(struct work_struct * work)325 void cx18_in_work_handler(struct work_struct *work)
326 {
327 struct cx18_in_work_order *order =
328 container_of(work, struct cx18_in_work_order, work);
329 struct cx18 *cx = order->cx;
330 epu_cmd(cx, order);
331 free_in_work_order(cx, order);
332 }
333
334
335 /*
336 * Functions that run in an interrupt handling context
337 */
338
mb_ack_irq(struct cx18 * cx,struct cx18_in_work_order * order)339 static void mb_ack_irq(struct cx18 *cx, struct cx18_in_work_order *order)
340 {
341 struct cx18_mailbox __iomem *ack_mb;
342 u32 ack_irq, req;
343
344 switch (order->rpu) {
345 case APU:
346 ack_irq = IRQ_EPU_TO_APU_ACK;
347 ack_mb = &cx->scb->apu2epu_mb;
348 break;
349 case CPU:
350 ack_irq = IRQ_EPU_TO_CPU_ACK;
351 ack_mb = &cx->scb->cpu2epu_mb;
352 break;
353 default:
354 CX18_WARN("Unhandled RPU (%d) for command %x ack\n",
355 order->rpu, order->mb.cmd);
356 return;
357 }
358
359 req = order->mb.request;
360 /* Don't ack if the RPU has gotten impatient and timed us out */
361 if (req != cx18_readl(cx, &ack_mb->request) ||
362 req == cx18_readl(cx, &ack_mb->ack)) {
363 CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
364 "incoming %s to EPU mailbox (sequence no. %u) "
365 "while processing\n",
366 rpu_str[order->rpu], rpu_str[order->rpu], req);
367 order->flags |= CX18_F_EWO_MB_STALE_WHILE_PROC;
368 return;
369 }
370 cx18_writel(cx, req, &ack_mb->ack);
371 cx18_write_reg_expect(cx, ack_irq, SW2_INT_SET, ack_irq, ack_irq);
372 return;
373 }
374
epu_dma_done_irq(struct cx18 * cx,struct cx18_in_work_order * order)375 static int epu_dma_done_irq(struct cx18 *cx, struct cx18_in_work_order *order)
376 {
377 u32 handle, mdl_ack_offset, mdl_ack_count;
378 struct cx18_mailbox *mb;
379
380 mb = &order->mb;
381 handle = mb->args[0];
382 mdl_ack_offset = mb->args[1];
383 mdl_ack_count = mb->args[2];
384
385 if (handle == CX18_INVALID_TASK_HANDLE ||
386 mdl_ack_count == 0 || mdl_ack_count > CX18_MAX_MDL_ACKS) {
387 if ((order->flags & CX18_F_EWO_MB_STALE) == 0)
388 mb_ack_irq(cx, order);
389 return -1;
390 }
391
392 cx18_memcpy_fromio(cx, order->mdl_ack, cx->enc_mem + mdl_ack_offset,
393 sizeof(struct cx18_mdl_ack) * mdl_ack_count);
394
395 if ((order->flags & CX18_F_EWO_MB_STALE) == 0)
396 mb_ack_irq(cx, order);
397 return 1;
398 }
399
400 static
epu_debug_irq(struct cx18 * cx,struct cx18_in_work_order * order)401 int epu_debug_irq(struct cx18 *cx, struct cx18_in_work_order *order)
402 {
403 u32 str_offset;
404 char *str = order->str;
405
406 str[0] = '\0';
407 str_offset = order->mb.args[1];
408 if (str_offset) {
409 cx18_setup_page(cx, str_offset);
410 cx18_memcpy_fromio(cx, str, cx->enc_mem + str_offset, 252);
411 str[252] = '\0';
412 cx18_setup_page(cx, SCB_OFFSET);
413 }
414
415 if ((order->flags & CX18_F_EWO_MB_STALE) == 0)
416 mb_ack_irq(cx, order);
417
418 return str_offset ? 1 : 0;
419 }
420
421 static inline
epu_cmd_irq(struct cx18 * cx,struct cx18_in_work_order * order)422 int epu_cmd_irq(struct cx18 *cx, struct cx18_in_work_order *order)
423 {
424 int ret = -1;
425
426 switch (order->rpu) {
427 case CPU:
428 {
429 switch (order->mb.cmd) {
430 case CX18_EPU_DMA_DONE:
431 ret = epu_dma_done_irq(cx, order);
432 break;
433 case CX18_EPU_DEBUG:
434 ret = epu_debug_irq(cx, order);
435 break;
436 default:
437 CX18_WARN("Unknown CPU to EPU mailbox command %#0x\n",
438 order->mb.cmd);
439 break;
440 }
441 break;
442 }
443 case APU:
444 CX18_WARN("Unknown APU to EPU mailbox command %#0x\n",
445 order->mb.cmd);
446 break;
447 default:
448 break;
449 }
450 return ret;
451 }
452
453 static inline
alloc_in_work_order_irq(struct cx18 * cx)454 struct cx18_in_work_order *alloc_in_work_order_irq(struct cx18 *cx)
455 {
456 int i;
457 struct cx18_in_work_order *order = NULL;
458
459 for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++) {
460 /*
461 * We only need "pending" atomic to inspect its contents,
462 * and need not do a check and set because:
463 * 1. Any work handler thread only clears "pending" and only
464 * on one, particular work order at a time, per handler thread.
465 * 2. "pending" is only set here, and we're serialized because
466 * we're called in an IRQ handler context.
467 */
468 if (atomic_read(&cx->in_work_order[i].pending) == 0) {
469 order = &cx->in_work_order[i];
470 atomic_set(&order->pending, 1);
471 break;
472 }
473 }
474 return order;
475 }
476
cx18_api_epu_cmd_irq(struct cx18 * cx,int rpu)477 void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu)
478 {
479 struct cx18_mailbox __iomem *mb;
480 struct cx18_mailbox *order_mb;
481 struct cx18_in_work_order *order;
482 int submit;
483
484 switch (rpu) {
485 case CPU:
486 mb = &cx->scb->cpu2epu_mb;
487 break;
488 case APU:
489 mb = &cx->scb->apu2epu_mb;
490 break;
491 default:
492 return;
493 }
494
495 order = alloc_in_work_order_irq(cx);
496 if (order == NULL) {
497 CX18_WARN("Unable to find blank work order form to schedule "
498 "incoming mailbox command processing\n");
499 return;
500 }
501
502 order->flags = 0;
503 order->rpu = rpu;
504 order_mb = &order->mb;
505
506 /* mb->cmd and mb->args[0] through mb->args[2] */
507 cx18_memcpy_fromio(cx, &order_mb->cmd, &mb->cmd, 4 * sizeof(u32));
508 /* mb->request and mb->ack. N.B. we want to read mb->ack last */
509 cx18_memcpy_fromio(cx, &order_mb->request, &mb->request,
510 2 * sizeof(u32));
511
512 if (order_mb->request == order_mb->ack) {
513 CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
514 "incoming %s to EPU mailbox (sequence no. %u)"
515 "\n",
516 rpu_str[rpu], rpu_str[rpu], order_mb->request);
517 if (cx18_debug & CX18_DBGFLG_WARN)
518 dump_mb(cx, order_mb, "incoming");
519 order->flags = CX18_F_EWO_MB_STALE_UPON_RECEIPT;
520 }
521
522 /*
523 * Individual EPU command processing is responsible for ack-ing
524 * a non-stale mailbox as soon as possible
525 */
526 submit = epu_cmd_irq(cx, order);
527 if (submit > 0) {
528 queue_work(cx->in_work_queue, &order->work);
529 }
530 }
531
532
533 /*
534 * Functions called from a non-interrupt, non work_queue context
535 */
536
cx18_api_call(struct cx18 * cx,u32 cmd,int args,u32 data[])537 static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
538 {
539 const struct cx18_api_info *info = find_api_info(cmd);
540 u32 state, irq, req, ack, err;
541 struct cx18_mailbox __iomem *mb;
542 u32 __iomem *xpu_state;
543 wait_queue_head_t *waitq;
544 struct mutex *mb_lock;
545 unsigned long int t0, timeout, ret;
546 int i;
547 char argstr[MAX_MB_ARGUMENTS*11+1];
548 DEFINE_WAIT(w);
549
550 if (info == NULL) {
551 CX18_WARN("unknown cmd %x\n", cmd);
552 return -EINVAL;
553 }
554
555 if (cx18_debug & CX18_DBGFLG_API) { /* only call u32arr2hex if needed */
556 if (cmd == CX18_CPU_DE_SET_MDL) {
557 if (cx18_debug & CX18_DBGFLG_HIGHVOL)
558 CX18_DEBUG_HI_API("%s\tcmd %#010x args%s\n",
559 info->name, cmd,
560 u32arr2hex(data, args, argstr));
561 } else
562 CX18_DEBUG_API("%s\tcmd %#010x args%s\n",
563 info->name, cmd,
564 u32arr2hex(data, args, argstr));
565 }
566
567 switch (info->rpu) {
568 case APU:
569 waitq = &cx->mb_apu_waitq;
570 mb_lock = &cx->epu2apu_mb_lock;
571 irq = IRQ_EPU_TO_APU;
572 mb = &cx->scb->epu2apu_mb;
573 xpu_state = &cx->scb->apu_state;
574 break;
575 case CPU:
576 waitq = &cx->mb_cpu_waitq;
577 mb_lock = &cx->epu2cpu_mb_lock;
578 irq = IRQ_EPU_TO_CPU;
579 mb = &cx->scb->epu2cpu_mb;
580 xpu_state = &cx->scb->cpu_state;
581 break;
582 default:
583 CX18_WARN("Unknown RPU (%d) for API call\n", info->rpu);
584 return -EINVAL;
585 }
586
587 mutex_lock(mb_lock);
588 /*
589 * Wait for an in-use mailbox to complete
590 *
591 * If the XPU is responding with Ack's, the mailbox shouldn't be in
592 * a busy state, since we serialize access to it on our end.
593 *
594 * If the wait for ack after sending a previous command was interrupted
595 * by a signal, we may get here and find a busy mailbox. After waiting,
596 * mark it "not busy" from our end, if the XPU hasn't ack'ed it still.
597 */
598 state = cx18_readl(cx, xpu_state);
599 req = cx18_readl(cx, &mb->request);
600 timeout = msecs_to_jiffies(10);
601 ret = wait_event_timeout(*waitq,
602 (ack = cx18_readl(cx, &mb->ack)) == req,
603 timeout);
604 if (req != ack) {
605 /* waited long enough, make the mbox "not busy" from our end */
606 cx18_writel(cx, req, &mb->ack);
607 CX18_ERR("mbox was found stuck busy when setting up for %s; "
608 "clearing busy and trying to proceed\n", info->name);
609 } else if (ret != timeout)
610 CX18_DEBUG_API("waited %u msecs for busy mbox to be acked\n",
611 jiffies_to_msecs(timeout-ret));
612
613 /* Build the outgoing mailbox */
614 req = ((req & 0xfffffffe) == 0xfffffffe) ? 1 : req + 1;
615
616 cx18_writel(cx, cmd, &mb->cmd);
617 for (i = 0; i < args; i++)
618 cx18_writel(cx, data[i], &mb->args[i]);
619 cx18_writel(cx, 0, &mb->error);
620 cx18_writel(cx, req, &mb->request);
621 cx18_writel(cx, req - 1, &mb->ack); /* ensure ack & req are distinct */
622
623 /*
624 * Notify the XPU and wait for it to send an Ack back
625 */
626 timeout = msecs_to_jiffies((info->flags & API_FAST) ? 10 : 20);
627
628 CX18_DEBUG_HI_IRQ("sending interrupt SW1: %x to send %s\n",
629 irq, info->name);
630
631 /* So we don't miss the wakeup, prepare to wait before notifying fw */
632 prepare_to_wait(waitq, &w, TASK_UNINTERRUPTIBLE);
633 cx18_write_reg_expect(cx, irq, SW1_INT_SET, irq, irq);
634
635 t0 = jiffies;
636 ack = cx18_readl(cx, &mb->ack);
637 if (ack != req) {
638 schedule_timeout(timeout);
639 ret = jiffies - t0;
640 ack = cx18_readl(cx, &mb->ack);
641 } else {
642 ret = jiffies - t0;
643 }
644
645 finish_wait(waitq, &w);
646
647 if (req != ack) {
648 mutex_unlock(mb_lock);
649 if (ret >= timeout) {
650 /* Timed out */
651 CX18_DEBUG_WARN("sending %s timed out waiting %d msecs "
652 "for RPU acknowledgement\n",
653 info->name, jiffies_to_msecs(ret));
654 } else {
655 CX18_DEBUG_WARN("woken up before mailbox ack was ready "
656 "after submitting %s to RPU. only "
657 "waited %d msecs on req %u but awakened"
658 " with unmatched ack %u\n",
659 info->name,
660 jiffies_to_msecs(ret),
661 req, ack);
662 }
663 return -EINVAL;
664 }
665
666 if (ret >= timeout)
667 CX18_DEBUG_WARN("failed to be awakened upon RPU acknowledgment "
668 "sending %s; timed out waiting %d msecs\n",
669 info->name, jiffies_to_msecs(ret));
670 else
671 CX18_DEBUG_HI_API("waited %u msecs for %s to be acked\n",
672 jiffies_to_msecs(ret), info->name);
673
674 /* Collect data returned by the XPU */
675 for (i = 0; i < MAX_MB_ARGUMENTS; i++)
676 data[i] = cx18_readl(cx, &mb->args[i]);
677 err = cx18_readl(cx, &mb->error);
678 mutex_unlock(mb_lock);
679
680 /*
681 * Wait for XPU to perform extra actions for the caller in some cases.
682 * e.g. CX18_CPU_DE_RELEASE_MDL will cause the CPU to send all MDLs
683 * back in a burst shortly thereafter
684 */
685 if (info->flags & API_SLOW)
686 cx18_msleep_timeout(300, 0);
687
688 if (err)
689 CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
690 info->name);
691 return err ? -EIO : 0;
692 }
693
cx18_api(struct cx18 * cx,u32 cmd,int args,u32 data[])694 int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[])
695 {
696 return cx18_api_call(cx, cmd, args, data);
697 }
698
cx18_set_filter_param(struct cx18_stream * s)699 static int cx18_set_filter_param(struct cx18_stream *s)
700 {
701 struct cx18 *cx = s->cx;
702 u32 mode;
703 int ret;
704
705 mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0);
706 ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
707 s->handle, 1, mode, cx->spatial_strength);
708 mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0);
709 ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
710 s->handle, 0, mode, cx->temporal_strength);
711 ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
712 s->handle, 2, cx->filter_mode >> 2, 0);
713 return ret;
714 }
715
cx18_api_func(void * priv,u32 cmd,int in,int out,u32 data[CX2341X_MBOX_MAX_DATA])716 int cx18_api_func(void *priv, u32 cmd, int in, int out,
717 u32 data[CX2341X_MBOX_MAX_DATA])
718 {
719 struct cx18_stream *s = priv;
720 struct cx18 *cx = s->cx;
721
722 switch (cmd) {
723 case CX2341X_ENC_SET_OUTPUT_PORT:
724 return 0;
725 case CX2341X_ENC_SET_FRAME_RATE:
726 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6,
727 s->handle, 0, 0, 0, 0, data[0]);
728 case CX2341X_ENC_SET_FRAME_SIZE:
729 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3,
730 s->handle, data[1], data[0]);
731 case CX2341X_ENC_SET_STREAM_TYPE:
732 return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2,
733 s->handle, data[0]);
734 case CX2341X_ENC_SET_ASPECT_RATIO:
735 return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2,
736 s->handle, data[0]);
737
738 case CX2341X_ENC_SET_GOP_PROPERTIES:
739 return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3,
740 s->handle, data[0], data[1]);
741 case CX2341X_ENC_SET_GOP_CLOSURE:
742 return 0;
743 case CX2341X_ENC_SET_AUDIO_PROPERTIES:
744 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2,
745 s->handle, data[0]);
746 case CX2341X_ENC_MUTE_AUDIO:
747 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2,
748 s->handle, data[0]);
749 case CX2341X_ENC_SET_BIT_RATE:
750 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5,
751 s->handle, data[0], data[1], data[2], data[3]);
752 case CX2341X_ENC_MUTE_VIDEO:
753 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
754 s->handle, data[0]);
755 case CX2341X_ENC_SET_FRAME_DROP_RATE:
756 return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2,
757 s->handle, data[0]);
758 case CX2341X_ENC_MISC:
759 return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4,
760 s->handle, data[0], data[1], data[2]);
761 case CX2341X_ENC_SET_DNR_FILTER_MODE:
762 cx->filter_mode = (data[0] & 3) | (data[1] << 2);
763 return cx18_set_filter_param(s);
764 case CX2341X_ENC_SET_DNR_FILTER_PROPS:
765 cx->spatial_strength = data[0];
766 cx->temporal_strength = data[1];
767 return cx18_set_filter_param(s);
768 case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
769 return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3,
770 s->handle, data[0], data[1]);
771 case CX2341X_ENC_SET_CORING_LEVELS:
772 return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5,
773 s->handle, data[0], data[1], data[2], data[3]);
774 }
775 CX18_WARN("Unknown cmd %x\n", cmd);
776 return 0;
777 }
778
cx18_vapi_result(struct cx18 * cx,u32 data[MAX_MB_ARGUMENTS],u32 cmd,int args,...)779 int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS],
780 u32 cmd, int args, ...)
781 {
782 va_list ap;
783 int i;
784
785 va_start(ap, args);
786 for (i = 0; i < args; i++)
787 data[i] = va_arg(ap, u32);
788 va_end(ap);
789 return cx18_api(cx, cmd, args, data);
790 }
791
cx18_vapi(struct cx18 * cx,u32 cmd,int args,...)792 int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
793 {
794 u32 data[MAX_MB_ARGUMENTS];
795 va_list ap;
796 int i;
797
798 if (cx == NULL) {
799 CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
800 return 0;
801 }
802 if (args > MAX_MB_ARGUMENTS) {
803 CX18_ERR("args too big (cmd=%x)\n", cmd);
804 args = MAX_MB_ARGUMENTS;
805 }
806 va_start(ap, args);
807 for (i = 0; i < args; i++)
808 data[i] = va_arg(ap, u32);
809 va_end(ap);
810 return cx18_api(cx, cmd, args, data);
811 }
812