1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * cx18 mailbox functions 4 * 5 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> 6 * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> 7 */ 8 9 #include <linux/bitops.h> 10 11 #include "cx18-driver.h" 12 #include "cx18-io.h" 13 #include "cx18-scb.h" 14 #include "cx18-irq.h" 15 #include "cx18-mailbox.h" 16 #include "cx18-queue.h" 17 #include "cx18-streams.h" 18 #include "cx18-alsa-pcm.h" /* FIXME make configurable */ 19 20 static const char *rpu_str[] = { "APU", "CPU", "EPU", "HPU" }; 21 22 #define API_FAST (1 << 2) /* Short timeout */ 23 #define API_SLOW (1 << 3) /* Additional 300ms timeout */ 24 25 struct cx18_api_info { 26 u32 cmd; 27 u8 flags; /* Flags, see above */ 28 u8 rpu; /* Processing unit */ 29 const char *name; /* The name of the command */ 30 }; 31 32 #define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x } 33 34 static const struct cx18_api_info api_info[] = { 35 /* MPEG encoder API */ 36 API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0), 37 API_ENTRY(CPU, CX18_EPU_DEBUG, 0), 38 API_ENTRY(CPU, CX18_CREATE_TASK, 0), 39 API_ENTRY(CPU, CX18_DESTROY_TASK, 0), 40 API_ENTRY(CPU, CX18_CPU_CAPTURE_START, API_SLOW), 41 API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP, API_SLOW), 42 API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE, 0), 43 API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME, 0), 44 API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0), 45 API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 0), 46 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN, 0), 47 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE, 0), 48 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION, 0), 49 API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM, 0), 50 API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 0), 51 API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING, 0), 52 API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE, 0), 53 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS, 0), 54 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE, 0), 55 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE, 0), 56 API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS, 0), 57 API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM, API_SLOW), 58 API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO, 0), 59 API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT, 0), 60 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID, 0), 61 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID, 0), 62 API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE, 0), 63 API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE, 0), 64 API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION, 0), 65 API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO, 0), 66 API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME, 0), 67 API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM, 0), 68 API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER, 0), 69 API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS, 0), 70 API_ENTRY(CPU, CX18_CPU_SET_VFC_PARAM, 0), 71 API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK, 0), 72 API_ENTRY(CPU, CX18_CPU_DE_SET_MDL, API_FAST), 73 API_ENTRY(CPU, CX18_CPU_DE_RELEASE_MDL, API_SLOW), 74 API_ENTRY(APU, CX18_APU_START, 0), 75 API_ENTRY(APU, CX18_APU_STOP, 0), 76 API_ENTRY(APU, CX18_APU_RESETAI, 0), 77 API_ENTRY(CPU, CX18_CPU_DEBUG_PEEK32, 0), 78 API_ENTRY(0, 0, 0), 79 }; 80 81 static const struct cx18_api_info *find_api_info(u32 cmd) 82 { 83 int i; 84 85 for (i = 0; api_info[i].cmd; i++) 86 if (api_info[i].cmd == cmd) 87 return &api_info[i]; 88 return NULL; 89 } 90 91 /* Call with buf of n*11+1 bytes */ 92 static char *u32arr2hex(u32 data[], int n, char *buf) 93 { 94 char *p; 95 int i; 96 97 for (i = 0, p = buf; i < n; i++, p += 11) { 98 /* kernel snprintf() appends '\0' always */ 99 snprintf(p, 12, " %#010x", data[i]); 100 } 101 *p = '\0'; 102 return buf; 103 } 104 105 static void dump_mb(struct cx18 *cx, struct cx18_mailbox *mb, char *name) 106 { 107 char argstr[MAX_MB_ARGUMENTS*11+1]; 108 109 if (!(cx18_debug & CX18_DBGFLG_API)) 110 return; 111 112 CX18_DEBUG_API("%s: req %#010x ack %#010x cmd %#010x err %#010x args%s\n", 113 name, mb->request, mb->ack, mb->cmd, mb->error, 114 u32arr2hex(mb->args, MAX_MB_ARGUMENTS, argstr)); 115 } 116 117 118 /* 119 * Functions that run in a work_queue work handling context 120 */ 121 122 static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl) 123 { 124 struct cx18_buffer *buf; 125 126 if (s->dvb == NULL || !s->dvb->enabled || mdl->bytesused == 0) 127 return; 128 129 /* We ignore mdl and buf readpos accounting here - it doesn't matter */ 130 131 /* The likely case */ 132 if (list_is_singular(&mdl->buf_list)) { 133 buf = list_first_entry(&mdl->buf_list, struct cx18_buffer, 134 list); 135 if (buf->bytesused) 136 dvb_dmx_swfilter(&s->dvb->demux, 137 buf->buf, buf->bytesused); 138 return; 139 } 140 141 list_for_each_entry(buf, &mdl->buf_list, list) { 142 if (buf->bytesused == 0) 143 break; 144 dvb_dmx_swfilter(&s->dvb->demux, buf->buf, buf->bytesused); 145 } 146 } 147 148 static void cx18_mdl_send_to_vb2(struct cx18_stream *s, struct cx18_mdl *mdl) 149 { 150 struct cx18_vb2_buffer *vb_buf; 151 struct cx18_buffer *buf; 152 u8 *p; 153 u32 offset = 0; 154 int dispatch = 0; 155 unsigned long bsize; 156 157 if (mdl->bytesused == 0) 158 return; 159 160 /* Acquire a vb2 buffer, clone to and release it */ 161 spin_lock(&s->vb_lock); 162 if (list_empty(&s->vb_capture)) 163 goto out; 164 165 vb_buf = list_first_entry(&s->vb_capture, struct cx18_vb2_buffer, 166 list); 167 168 p = vb2_plane_vaddr(&vb_buf->vb.vb2_buf, 0); 169 if (!p) 170 goto out; 171 172 bsize = vb2_get_plane_payload(&vb_buf->vb.vb2_buf, 0); 173 offset = vb_buf->bytes_used; 174 list_for_each_entry(buf, &mdl->buf_list, list) { 175 if (buf->bytesused == 0) 176 break; 177 178 if ((offset + buf->bytesused) <= bsize) { 179 memcpy(p + offset, buf->buf, buf->bytesused); 180 offset += buf->bytesused; 181 vb_buf->bytes_used += buf->bytesused; 182 } 183 } 184 185 /* If we've filled the buffer as per the callers res then dispatch it */ 186 if (vb_buf->bytes_used >= s->vb_bytes_per_frame) { 187 dispatch = 1; 188 vb_buf->bytes_used = 0; 189 } 190 191 if (dispatch) { 192 vb_buf->vb.vb2_buf.timestamp = ktime_get_ns(); 193 vb_buf->vb.sequence = s->sequence++; 194 list_del(&vb_buf->list); 195 vb2_buffer_done(&vb_buf->vb.vb2_buf, VB2_BUF_STATE_DONE); 196 } 197 198 mod_timer(&s->vb_timeout, msecs_to_jiffies(2000) + jiffies); 199 200 out: 201 spin_unlock(&s->vb_lock); 202 } 203 204 static void cx18_mdl_send_to_alsa(struct cx18 *cx, struct cx18_stream *s, 205 struct cx18_mdl *mdl) 206 { 207 struct cx18_buffer *buf; 208 209 if (mdl->bytesused == 0) 210 return; 211 212 /* We ignore mdl and buf readpos accounting here - it doesn't matter */ 213 214 /* The likely case */ 215 if (list_is_singular(&mdl->buf_list)) { 216 buf = list_first_entry(&mdl->buf_list, struct cx18_buffer, 217 list); 218 if (buf->bytesused) 219 cx->pcm_announce_callback(cx->alsa, buf->buf, 220 buf->bytesused); 221 return; 222 } 223 224 list_for_each_entry(buf, &mdl->buf_list, list) { 225 if (buf->bytesused == 0) 226 break; 227 cx->pcm_announce_callback(cx->alsa, buf->buf, buf->bytesused); 228 } 229 } 230 231 static void epu_dma_done(struct cx18 *cx, struct cx18_in_work_order *order) 232 { 233 u32 handle, mdl_ack_count, id; 234 struct cx18_mailbox *mb; 235 struct cx18_mdl_ack *mdl_ack; 236 struct cx18_stream *s; 237 struct cx18_mdl *mdl; 238 int i; 239 240 mb = &order->mb; 241 handle = mb->args[0]; 242 s = cx18_handle_to_stream(cx, handle); 243 244 if (s == NULL) { 245 CX18_WARN("Got DMA done notification for unknown/inactive handle %d, %s mailbox seq no %d\n", 246 handle, 247 (order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) ? 248 "stale" : "good", mb->request); 249 return; 250 } 251 252 mdl_ack_count = mb->args[2]; 253 mdl_ack = order->mdl_ack; 254 for (i = 0; i < mdl_ack_count; i++, mdl_ack++) { 255 id = mdl_ack->id; 256 /* 257 * Simple integrity check for processing a stale (and possibly 258 * inconsistent mailbox): make sure the MDL id is in the 259 * valid range for the stream. 260 * 261 * We go through the trouble of dealing with stale mailboxes 262 * because most of the time, the mailbox data is still valid and 263 * unchanged (and in practice the firmware ping-pongs the 264 * two mdl_ack buffers so mdl_acks are not stale). 265 * 266 * There are occasions when we get a half changed mailbox, 267 * which this check catches for a handle & id mismatch. If the 268 * handle and id do correspond, the worst case is that we 269 * completely lost the old MDL, but pick up the new MDL 270 * early (but the new mdl_ack is guaranteed to be good in this 271 * case as the firmware wouldn't point us to a new mdl_ack until 272 * it's filled in). 273 * 274 * cx18_queue_get_mdl() will detect the lost MDLs 275 * and send them back to q_free for fw rotation eventually. 276 */ 277 if ((order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) && 278 !(id >= s->mdl_base_idx && 279 id < (s->mdl_base_idx + s->buffers))) { 280 CX18_WARN("Fell behind! Ignoring stale mailbox with inconsistent data. Lost MDL for mailbox seq no %d\n", 281 mb->request); 282 break; 283 } 284 mdl = cx18_queue_get_mdl(s, id, mdl_ack->data_used); 285 286 CX18_DEBUG_HI_DMA("DMA DONE for %s (MDL %d)\n", s->name, id); 287 if (mdl == NULL) { 288 CX18_WARN("Could not find MDL %d for stream %s\n", 289 id, s->name); 290 continue; 291 } 292 293 CX18_DEBUG_HI_DMA("%s recv bytesused = %d\n", 294 s->name, mdl->bytesused); 295 296 if (s->type == CX18_ENC_STREAM_TYPE_TS) { 297 cx18_mdl_send_to_dvb(s, mdl); 298 cx18_enqueue(s, mdl, &s->q_free); 299 } else if (s->type == CX18_ENC_STREAM_TYPE_PCM) { 300 /* Pass the data to cx18-alsa */ 301 if (cx->pcm_announce_callback != NULL) { 302 cx18_mdl_send_to_alsa(cx, s, mdl); 303 cx18_enqueue(s, mdl, &s->q_free); 304 } else { 305 cx18_enqueue(s, mdl, &s->q_full); 306 } 307 } else if (s->type == CX18_ENC_STREAM_TYPE_YUV) { 308 cx18_mdl_send_to_vb2(s, mdl); 309 cx18_enqueue(s, mdl, &s->q_free); 310 } else { 311 cx18_enqueue(s, mdl, &s->q_full); 312 if (s->type == CX18_ENC_STREAM_TYPE_IDX) 313 cx18_stream_rotate_idx_mdls(cx); 314 } 315 } 316 /* Put as many MDLs as possible back into fw use */ 317 cx18_stream_load_fw_queue(s); 318 319 wake_up(&cx->dma_waitq); 320 if (s->id != -1) 321 wake_up(&s->waitq); 322 } 323 324 static void epu_debug(struct cx18 *cx, struct cx18_in_work_order *order) 325 { 326 char *p; 327 char *str = order->str; 328 329 CX18_DEBUG_INFO("%x %s\n", order->mb.args[0], str); 330 p = strchr(str, '.'); 331 if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags) && p && p > str) 332 CX18_INFO("FW version: %s\n", p - 1); 333 } 334 335 static void epu_cmd(struct cx18 *cx, struct cx18_in_work_order *order) 336 { 337 switch (order->rpu) { 338 case CPU: 339 { 340 switch (order->mb.cmd) { 341 case CX18_EPU_DMA_DONE: 342 epu_dma_done(cx, order); 343 break; 344 case CX18_EPU_DEBUG: 345 epu_debug(cx, order); 346 break; 347 default: 348 CX18_WARN("Unknown CPU to EPU mailbox command %#0x\n", 349 order->mb.cmd); 350 break; 351 } 352 break; 353 } 354 case APU: 355 CX18_WARN("Unknown APU to EPU mailbox command %#0x\n", 356 order->mb.cmd); 357 break; 358 default: 359 break; 360 } 361 } 362 363 static 364 void free_in_work_order(struct cx18 *cx, struct cx18_in_work_order *order) 365 { 366 atomic_set(&order->pending, 0); 367 } 368 369 void cx18_in_work_handler(struct work_struct *work) 370 { 371 struct cx18_in_work_order *order = 372 container_of(work, struct cx18_in_work_order, work); 373 struct cx18 *cx = order->cx; 374 epu_cmd(cx, order); 375 free_in_work_order(cx, order); 376 } 377 378 379 /* 380 * Functions that run in an interrupt handling context 381 */ 382 383 static void mb_ack_irq(struct cx18 *cx, struct cx18_in_work_order *order) 384 { 385 struct cx18_mailbox __iomem *ack_mb; 386 u32 ack_irq, req; 387 388 switch (order->rpu) { 389 case APU: 390 ack_irq = IRQ_EPU_TO_APU_ACK; 391 ack_mb = &cx->scb->apu2epu_mb; 392 break; 393 case CPU: 394 ack_irq = IRQ_EPU_TO_CPU_ACK; 395 ack_mb = &cx->scb->cpu2epu_mb; 396 break; 397 default: 398 CX18_WARN("Unhandled RPU (%d) for command %x ack\n", 399 order->rpu, order->mb.cmd); 400 return; 401 } 402 403 req = order->mb.request; 404 /* Don't ack if the RPU has gotten impatient and timed us out */ 405 if (req != cx18_readl(cx, &ack_mb->request) || 406 req == cx18_readl(cx, &ack_mb->ack)) { 407 CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our incoming %s to EPU mailbox (sequence no. %u) while processing\n", 408 rpu_str[order->rpu], rpu_str[order->rpu], req); 409 order->flags |= CX18_F_EWO_MB_STALE_WHILE_PROC; 410 return; 411 } 412 cx18_writel(cx, req, &ack_mb->ack); 413 cx18_write_reg_expect(cx, ack_irq, SW2_INT_SET, ack_irq, ack_irq); 414 return; 415 } 416 417 static int epu_dma_done_irq(struct cx18 *cx, struct cx18_in_work_order *order) 418 { 419 u32 handle, mdl_ack_offset, mdl_ack_count; 420 struct cx18_mailbox *mb; 421 int i; 422 423 mb = &order->mb; 424 handle = mb->args[0]; 425 mdl_ack_offset = mb->args[1]; 426 mdl_ack_count = mb->args[2]; 427 428 if (handle == CX18_INVALID_TASK_HANDLE || 429 mdl_ack_count == 0 || mdl_ack_count > CX18_MAX_MDL_ACKS) { 430 if ((order->flags & CX18_F_EWO_MB_STALE) == 0) 431 mb_ack_irq(cx, order); 432 return -1; 433 } 434 435 for (i = 0; i < sizeof(struct cx18_mdl_ack) * mdl_ack_count; i += sizeof(u32)) 436 ((u32 *)order->mdl_ack)[i / sizeof(u32)] = 437 cx18_readl(cx, cx->enc_mem + mdl_ack_offset + i); 438 439 if ((order->flags & CX18_F_EWO_MB_STALE) == 0) 440 mb_ack_irq(cx, order); 441 return 1; 442 } 443 444 static 445 int epu_debug_irq(struct cx18 *cx, struct cx18_in_work_order *order) 446 { 447 u32 str_offset; 448 char *str = order->str; 449 450 str[0] = '\0'; 451 str_offset = order->mb.args[1]; 452 if (str_offset) { 453 cx18_setup_page(cx, str_offset); 454 cx18_memcpy_fromio(cx, str, cx->enc_mem + str_offset, 252); 455 str[252] = '\0'; 456 cx18_setup_page(cx, SCB_OFFSET); 457 } 458 459 if ((order->flags & CX18_F_EWO_MB_STALE) == 0) 460 mb_ack_irq(cx, order); 461 462 return str_offset ? 1 : 0; 463 } 464 465 static inline 466 int epu_cmd_irq(struct cx18 *cx, struct cx18_in_work_order *order) 467 { 468 int ret = -1; 469 470 switch (order->rpu) { 471 case CPU: 472 { 473 switch (order->mb.cmd) { 474 case CX18_EPU_DMA_DONE: 475 ret = epu_dma_done_irq(cx, order); 476 break; 477 case CX18_EPU_DEBUG: 478 ret = epu_debug_irq(cx, order); 479 break; 480 default: 481 CX18_WARN("Unknown CPU to EPU mailbox command %#0x\n", 482 order->mb.cmd); 483 break; 484 } 485 break; 486 } 487 case APU: 488 CX18_WARN("Unknown APU to EPU mailbox command %#0x\n", 489 order->mb.cmd); 490 break; 491 default: 492 break; 493 } 494 return ret; 495 } 496 497 static inline 498 struct cx18_in_work_order *alloc_in_work_order_irq(struct cx18 *cx) 499 { 500 int i; 501 struct cx18_in_work_order *order = NULL; 502 503 for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++) { 504 /* 505 * We only need "pending" atomic to inspect its contents, 506 * and need not do a check and set because: 507 * 1. Any work handler thread only clears "pending" and only 508 * on one, particular work order at a time, per handler thread. 509 * 2. "pending" is only set here, and we're serialized because 510 * we're called in an IRQ handler context. 511 */ 512 if (atomic_read(&cx->in_work_order[i].pending) == 0) { 513 order = &cx->in_work_order[i]; 514 atomic_set(&order->pending, 1); 515 break; 516 } 517 } 518 return order; 519 } 520 521 void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu) 522 { 523 struct cx18_mailbox __iomem *mb; 524 struct cx18_mailbox *order_mb; 525 struct cx18_in_work_order *order; 526 int submit; 527 int i; 528 529 switch (rpu) { 530 case CPU: 531 mb = &cx->scb->cpu2epu_mb; 532 break; 533 case APU: 534 mb = &cx->scb->apu2epu_mb; 535 break; 536 default: 537 return; 538 } 539 540 order = alloc_in_work_order_irq(cx); 541 if (order == NULL) { 542 CX18_WARN("Unable to find blank work order form to schedule incoming mailbox command processing\n"); 543 return; 544 } 545 546 order->flags = 0; 547 order->rpu = rpu; 548 order_mb = &order->mb; 549 550 /* mb->cmd and mb->args[0] through mb->args[2] */ 551 for (i = 0; i < 4; i++) 552 (&order_mb->cmd)[i] = cx18_readl(cx, &mb->cmd + i); 553 554 /* mb->request and mb->ack. N.B. we want to read mb->ack last */ 555 for (i = 0; i < 2; i++) 556 (&order_mb->request)[i] = cx18_readl(cx, &mb->request + i); 557 558 if (order_mb->request == order_mb->ack) { 559 CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our incoming %s to EPU mailbox (sequence no. %u)\n", 560 rpu_str[rpu], rpu_str[rpu], order_mb->request); 561 if (cx18_debug & CX18_DBGFLG_WARN) 562 dump_mb(cx, order_mb, "incoming"); 563 order->flags = CX18_F_EWO_MB_STALE_UPON_RECEIPT; 564 } 565 566 /* 567 * Individual EPU command processing is responsible for ack-ing 568 * a non-stale mailbox as soon as possible 569 */ 570 submit = epu_cmd_irq(cx, order); 571 if (submit > 0) { 572 queue_work(cx->in_work_queue, &order->work); 573 } 574 } 575 576 577 /* 578 * Functions called from a non-interrupt, non work_queue context 579 */ 580 581 static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[]) 582 { 583 const struct cx18_api_info *info = find_api_info(cmd); 584 u32 irq, req, ack, err; 585 struct cx18_mailbox __iomem *mb; 586 wait_queue_head_t *waitq; 587 struct mutex *mb_lock; 588 unsigned long int t0, timeout, ret; 589 int i; 590 char argstr[MAX_MB_ARGUMENTS*11+1]; 591 DEFINE_WAIT(w); 592 593 if (info == NULL) { 594 CX18_WARN("unknown cmd %x\n", cmd); 595 return -EINVAL; 596 } 597 598 if (cx18_debug & CX18_DBGFLG_API) { /* only call u32arr2hex if needed */ 599 if (cmd == CX18_CPU_DE_SET_MDL) { 600 if (cx18_debug & CX18_DBGFLG_HIGHVOL) 601 CX18_DEBUG_HI_API("%s\tcmd %#010x args%s\n", 602 info->name, cmd, 603 u32arr2hex(data, args, argstr)); 604 } else 605 CX18_DEBUG_API("%s\tcmd %#010x args%s\n", 606 info->name, cmd, 607 u32arr2hex(data, args, argstr)); 608 } 609 610 switch (info->rpu) { 611 case APU: 612 waitq = &cx->mb_apu_waitq; 613 mb_lock = &cx->epu2apu_mb_lock; 614 irq = IRQ_EPU_TO_APU; 615 mb = &cx->scb->epu2apu_mb; 616 break; 617 case CPU: 618 waitq = &cx->mb_cpu_waitq; 619 mb_lock = &cx->epu2cpu_mb_lock; 620 irq = IRQ_EPU_TO_CPU; 621 mb = &cx->scb->epu2cpu_mb; 622 break; 623 default: 624 CX18_WARN("Unknown RPU (%d) for API call\n", info->rpu); 625 return -EINVAL; 626 } 627 628 mutex_lock(mb_lock); 629 /* 630 * Wait for an in-use mailbox to complete 631 * 632 * If the XPU is responding with Ack's, the mailbox shouldn't be in 633 * a busy state, since we serialize access to it on our end. 634 * 635 * If the wait for ack after sending a previous command was interrupted 636 * by a signal, we may get here and find a busy mailbox. After waiting, 637 * mark it "not busy" from our end, if the XPU hasn't ack'ed it still. 638 */ 639 req = cx18_readl(cx, &mb->request); 640 timeout = msecs_to_jiffies(10); 641 ret = wait_event_timeout(*waitq, 642 (ack = cx18_readl(cx, &mb->ack)) == req, 643 timeout); 644 if (req != ack) { 645 /* waited long enough, make the mbox "not busy" from our end */ 646 cx18_writel(cx, req, &mb->ack); 647 CX18_ERR("mbox was found stuck busy when setting up for %s; clearing busy and trying to proceed\n", 648 info->name); 649 } else if (ret != timeout) 650 CX18_DEBUG_API("waited %u msecs for busy mbox to be acked\n", 651 jiffies_to_msecs(timeout-ret)); 652 653 /* Build the outgoing mailbox */ 654 req = ((req & 0xfffffffe) == 0xfffffffe) ? 1 : req + 1; 655 656 cx18_writel(cx, cmd, &mb->cmd); 657 for (i = 0; i < args; i++) 658 cx18_writel(cx, data[i], &mb->args[i]); 659 cx18_writel(cx, 0, &mb->error); 660 cx18_writel(cx, req, &mb->request); 661 cx18_writel(cx, req - 1, &mb->ack); /* ensure ack & req are distinct */ 662 663 /* 664 * Notify the XPU and wait for it to send an Ack back 665 */ 666 timeout = msecs_to_jiffies((info->flags & API_FAST) ? 10 : 20); 667 668 CX18_DEBUG_HI_IRQ("sending interrupt SW1: %x to send %s\n", 669 irq, info->name); 670 671 /* So we don't miss the wakeup, prepare to wait before notifying fw */ 672 prepare_to_wait(waitq, &w, TASK_UNINTERRUPTIBLE); 673 cx18_write_reg_expect(cx, irq, SW1_INT_SET, irq, irq); 674 675 t0 = jiffies; 676 ack = cx18_readl(cx, &mb->ack); 677 if (ack != req) { 678 schedule_timeout(timeout); 679 ret = jiffies - t0; 680 ack = cx18_readl(cx, &mb->ack); 681 } else { 682 ret = jiffies - t0; 683 } 684 685 finish_wait(waitq, &w); 686 687 if (req != ack) { 688 mutex_unlock(mb_lock); 689 if (ret >= timeout) { 690 /* Timed out */ 691 CX18_DEBUG_WARN("sending %s timed out waiting %d msecs for RPU acknowledgment\n", 692 info->name, jiffies_to_msecs(ret)); 693 } else { 694 CX18_DEBUG_WARN("woken up before mailbox ack was ready after submitting %s to RPU. only waited %d msecs on req %u but awakened with unmatched ack %u\n", 695 info->name, 696 jiffies_to_msecs(ret), 697 req, ack); 698 } 699 return -EINVAL; 700 } 701 702 if (ret >= timeout) 703 CX18_DEBUG_WARN("failed to be awakened upon RPU acknowledgment sending %s; timed out waiting %d msecs\n", 704 info->name, jiffies_to_msecs(ret)); 705 else 706 CX18_DEBUG_HI_API("waited %u msecs for %s to be acked\n", 707 jiffies_to_msecs(ret), info->name); 708 709 /* Collect data returned by the XPU */ 710 for (i = 0; i < MAX_MB_ARGUMENTS; i++) 711 data[i] = cx18_readl(cx, &mb->args[i]); 712 err = cx18_readl(cx, &mb->error); 713 mutex_unlock(mb_lock); 714 715 /* 716 * Wait for XPU to perform extra actions for the caller in some cases. 717 * e.g. CX18_CPU_DE_RELEASE_MDL will cause the CPU to send all MDLs 718 * back in a burst shortly thereafter 719 */ 720 if (info->flags & API_SLOW) 721 cx18_msleep_timeout(300, 0); 722 723 if (err) 724 CX18_DEBUG_API("mailbox error %08x for command %s\n", err, 725 info->name); 726 return err ? -EIO : 0; 727 } 728 729 int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[]) 730 { 731 return cx18_api_call(cx, cmd, args, data); 732 } 733 734 static int cx18_set_filter_param(struct cx18_stream *s) 735 { 736 struct cx18 *cx = s->cx; 737 u32 mode; 738 int ret; 739 740 mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0); 741 ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4, 742 s->handle, 1, mode, cx->spatial_strength); 743 mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0); 744 ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4, 745 s->handle, 0, mode, cx->temporal_strength); 746 ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4, 747 s->handle, 2, cx->filter_mode >> 2, 0); 748 return ret; 749 } 750 751 int cx18_api_func(void *priv, u32 cmd, int in, int out, 752 u32 data[CX2341X_MBOX_MAX_DATA]) 753 { 754 struct cx18_stream *s = priv; 755 struct cx18 *cx = s->cx; 756 757 switch (cmd) { 758 case CX2341X_ENC_SET_OUTPUT_PORT: 759 return 0; 760 case CX2341X_ENC_SET_FRAME_RATE: 761 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6, 762 s->handle, 0, 0, 0, 0, data[0]); 763 case CX2341X_ENC_SET_FRAME_SIZE: 764 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3, 765 s->handle, data[1], data[0]); 766 case CX2341X_ENC_SET_STREAM_TYPE: 767 return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2, 768 s->handle, data[0]); 769 case CX2341X_ENC_SET_ASPECT_RATIO: 770 return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2, 771 s->handle, data[0]); 772 773 case CX2341X_ENC_SET_GOP_PROPERTIES: 774 return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3, 775 s->handle, data[0], data[1]); 776 case CX2341X_ENC_SET_GOP_CLOSURE: 777 return 0; 778 case CX2341X_ENC_SET_AUDIO_PROPERTIES: 779 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2, 780 s->handle, data[0]); 781 case CX2341X_ENC_MUTE_AUDIO: 782 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, 783 s->handle, data[0]); 784 case CX2341X_ENC_SET_BIT_RATE: 785 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5, 786 s->handle, data[0], data[1], data[2], data[3]); 787 case CX2341X_ENC_MUTE_VIDEO: 788 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, 789 s->handle, data[0]); 790 case CX2341X_ENC_SET_FRAME_DROP_RATE: 791 return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2, 792 s->handle, data[0]); 793 case CX2341X_ENC_MISC: 794 return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4, 795 s->handle, data[0], data[1], data[2]); 796 case CX2341X_ENC_SET_DNR_FILTER_MODE: 797 cx->filter_mode = (data[0] & 3) | (data[1] << 2); 798 return cx18_set_filter_param(s); 799 case CX2341X_ENC_SET_DNR_FILTER_PROPS: 800 cx->spatial_strength = data[0]; 801 cx->temporal_strength = data[1]; 802 return cx18_set_filter_param(s); 803 case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE: 804 return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3, 805 s->handle, data[0], data[1]); 806 case CX2341X_ENC_SET_CORING_LEVELS: 807 return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5, 808 s->handle, data[0], data[1], data[2], data[3]); 809 } 810 CX18_WARN("Unknown cmd %x\n", cmd); 811 return 0; 812 } 813 814 int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS], 815 u32 cmd, int args, ...) 816 { 817 va_list ap; 818 int i; 819 820 va_start(ap, args); 821 for (i = 0; i < args; i++) 822 data[i] = va_arg(ap, u32); 823 va_end(ap); 824 return cx18_api(cx, cmd, args, data); 825 } 826 827 int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...) 828 { 829 u32 data[MAX_MB_ARGUMENTS]; 830 va_list ap; 831 int i; 832 833 if (cx == NULL) { 834 pr_err("cx == NULL (cmd=%x)\n", cmd); 835 return 0; 836 } 837 if (args > MAX_MB_ARGUMENTS) { 838 CX18_ERR("args too big (cmd=%x)\n", cmd); 839 args = MAX_MB_ARGUMENTS; 840 } 841 va_start(ap, args); 842 for (i = 0; i < args; i++) 843 data[i] = va_arg(ap, u32); 844 va_end(ap); 845 return cx18_api(cx, cmd, args, data); 846 } 847