Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dmxdev.c - DVB demultiplexer device |
| 3 | * |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4 | * Copyright (C) 2000 Ralph Metzler & Marcus Metzler |
| 5 | * for convergence integrated media GmbH |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public License |
| 9 | * as published by the Free Software Foundation; either version 2.1 |
| 10 | * of the License, or (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 Lesser 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 02111-1307, USA. |
| 20 | * |
| 21 | */ |
| 22 | |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 23 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/spinlock.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/vmalloc.h> |
| 27 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/poll.h> |
| 29 | #include <linux/ioctl.h> |
| 30 | #include <linux/wait.h> |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 31 | #include <linux/uaccess.h> |
| 32 | #include <linux/debugfs.h> |
| 33 | #include <linux/seq_file.h> |
| 34 | #include <linux/compat.h> |
| 35 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "dmxdev.h" |
| 37 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 38 | static int overflow_auto_flush = 1; |
| 39 | module_param(overflow_auto_flush, int, 0644); |
| 40 | MODULE_PARM_DESC(overflow_auto_flush, |
| 41 | "Automatically flush buffer on overflow (default: on)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 43 | #define DMX_DEFAULT_DECODER_BUFFER_SIZE (32768) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 45 | static inline int dvb_dmxdev_verify_buffer_size(u32 size, u32 max_size, |
| 46 | u32 size_align) |
| 47 | { |
| 48 | if (size_align) |
| 49 | return size <= max_size && !(size % size_align); |
| 50 | else |
| 51 | return size <= max_size; |
| 52 | } |
| 53 | |
| 54 | static int dvb_filter_verify_buffer_size(struct dmxdev_filter *filter) |
| 55 | { |
| 56 | struct dmx_caps caps; |
| 57 | size_t size = filter->buffer.size; |
| 58 | |
| 59 | /* |
| 60 | * For backward compatibility, if no demux capabilities can |
| 61 | * be retrieved assume size is ok. |
| 62 | * Decoder filter buffer size is verified when decoder buffer is set. |
| 63 | */ |
| 64 | if (filter->dev->demux->get_caps) { |
| 65 | filter->dev->demux->get_caps(filter->dev->demux, &caps); |
| 66 | |
| 67 | if (filter->type == DMXDEV_TYPE_SEC) |
| 68 | return dvb_dmxdev_verify_buffer_size( |
| 69 | size, |
| 70 | caps.section.max_size, |
| 71 | caps.section.size_alignment); |
| 72 | |
| 73 | if (filter->params.pes.output == DMX_OUT_TAP) |
| 74 | return dvb_dmxdev_verify_buffer_size( |
| 75 | size, |
| 76 | caps.pes.max_size, |
| 77 | caps.pes.size_alignment); |
| 78 | |
| 79 | size = (filter->params.pes.output == DMX_OUT_TS_TAP) ? |
| 80 | filter->dev->dvr_buffer.size : size; |
| 81 | |
| 82 | if (filter->params.pes.output == DMX_OUT_TSDEMUX_TAP || |
| 83 | filter->params.pes.output == DMX_OUT_TS_TAP) { |
| 84 | if (filter->dmx_tsp_format == DMX_TSP_FORMAT_188) |
| 85 | return dvb_dmxdev_verify_buffer_size( |
| 86 | size, |
| 87 | caps.recording_188_tsp.max_size, |
| 88 | caps.recording_188_tsp.size_alignment); |
| 89 | |
| 90 | return dvb_dmxdev_verify_buffer_size( |
| 91 | size, |
| 92 | caps.recording_192_tsp.max_size, |
| 93 | caps.recording_192_tsp.size_alignment); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | return 1; |
| 98 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 100 | static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf, |
| 101 | const u8 *src, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | { |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 103 | ssize_t free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
| 105 | if (!len) |
| 106 | return 0; |
| 107 | if (!buf->data) |
| 108 | return 0; |
| 109 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 110 | free = dvb_ringbuffer_free(buf); |
| 111 | if (len > free) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 112 | pr_debug("dmxdev: buffer overflow\n"); |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 113 | return -EOVERFLOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 115 | |
| 116 | return dvb_ringbuffer_write(buf, src, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 119 | static inline void dvb_dmxdev_notify_data_read(struct dmxdev_filter *filter, |
| 120 | int bytes_read) |
| 121 | { |
| 122 | if (!filter) |
| 123 | return; |
| 124 | |
| 125 | if (filter->type == DMXDEV_TYPE_SEC) { |
| 126 | if (filter->feed.sec.feed->notify_data_read) |
| 127 | filter->feed.sec.feed->notify_data_read( |
| 128 | filter->filter.sec, |
| 129 | bytes_read); |
| 130 | } else { |
| 131 | struct dmxdev_feed *feed; |
| 132 | |
| 133 | /* |
| 134 | * All feeds of same demux-handle share the same output |
| 135 | * buffer, it is enough to notify on the buffer status |
| 136 | * on one of the feeds |
| 137 | */ |
| 138 | feed = list_first_entry(&filter->feed.ts, |
| 139 | struct dmxdev_feed, next); |
| 140 | |
| 141 | if (feed->ts->notify_data_read) |
| 142 | feed->ts->notify_data_read( |
| 143 | feed->ts, |
| 144 | bytes_read); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | static inline u32 dvb_dmxdev_advance_event_idx(u32 index) |
| 149 | { |
| 150 | index++; |
| 151 | if (index >= DMX_EVENT_QUEUE_SIZE) |
| 152 | index = 0; |
| 153 | |
| 154 | return index; |
| 155 | } |
| 156 | |
| 157 | static inline int dvb_dmxdev_events_is_full(struct dmxdev_events_queue *events) |
| 158 | { |
| 159 | int new_write_index; |
| 160 | |
| 161 | new_write_index = dvb_dmxdev_advance_event_idx(events->write_index); |
| 162 | if (new_write_index == events->read_index) |
| 163 | return 1; |
| 164 | |
| 165 | return 0; |
| 166 | |
| 167 | } |
| 168 | |
| 169 | static inline void dvb_dmxdev_flush_events(struct dmxdev_events_queue *events) |
| 170 | { |
| 171 | events->read_index = 0; |
| 172 | events->write_index = 0; |
| 173 | events->notified_index = 0; |
| 174 | events->bytes_read_no_event = 0; |
| 175 | events->current_event_data_size = 0; |
| 176 | events->wakeup_events_counter = 0; |
| 177 | } |
| 178 | |
| 179 | static inline void dvb_dmxdev_flush_output(struct dvb_ringbuffer *buffer, |
| 180 | struct dmxdev_events_queue *events) |
| 181 | { |
| 182 | dvb_dmxdev_flush_events(events); |
| 183 | dvb_ringbuffer_flush(buffer); |
| 184 | } |
| 185 | |
| 186 | static int dvb_dmxdev_update_pes_event(struct dmx_filter_event *event, |
| 187 | int bytes_read) |
| 188 | { |
| 189 | int start_delta; |
| 190 | |
| 191 | if (event->params.pes.total_length <= bytes_read) |
| 192 | return event->params.pes.total_length; |
| 193 | |
| 194 | /* |
| 195 | * only part of the data relevant to this event was read. |
| 196 | * Update the event's information to reflect the new state. |
| 197 | */ |
| 198 | event->params.pes.total_length -= bytes_read; |
| 199 | |
| 200 | start_delta = event->params.pes.start_offset - |
| 201 | event->params.pes.base_offset; |
| 202 | |
| 203 | if (bytes_read <= start_delta) { |
| 204 | event->params.pes.base_offset += |
| 205 | bytes_read; |
| 206 | } else { |
| 207 | start_delta = |
| 208 | bytes_read - start_delta; |
| 209 | |
| 210 | event->params.pes.start_offset += start_delta; |
| 211 | event->params.pes.actual_length -= start_delta; |
| 212 | |
| 213 | event->params.pes.base_offset = |
| 214 | event->params.pes.start_offset; |
| 215 | } |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static int dvb_dmxdev_update_section_event(struct dmx_filter_event *event, |
| 221 | int bytes_read) |
| 222 | { |
| 223 | int start_delta; |
| 224 | |
| 225 | if (event->params.section.total_length <= bytes_read) |
| 226 | return event->params.section.total_length; |
| 227 | |
| 228 | /* |
| 229 | * only part of the data relevant to this event was read. |
| 230 | * Update the event's information to reflect the new state. |
| 231 | */ |
| 232 | |
| 233 | event->params.section.total_length -= bytes_read; |
| 234 | |
| 235 | start_delta = event->params.section.start_offset - |
| 236 | event->params.section.base_offset; |
| 237 | |
| 238 | if (bytes_read <= start_delta) { |
| 239 | event->params.section.base_offset += |
| 240 | bytes_read; |
| 241 | } else { |
| 242 | start_delta = |
| 243 | bytes_read - start_delta; |
| 244 | |
| 245 | event->params.section.start_offset += start_delta; |
| 246 | event->params.section.actual_length -= start_delta; |
| 247 | |
| 248 | event->params.section.base_offset = |
| 249 | event->params.section.start_offset; |
| 250 | } |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static int dvb_dmxdev_update_rec_event(struct dmx_filter_event *event, |
| 256 | int bytes_read) |
| 257 | { |
| 258 | if (event->params.recording_chunk.size <= bytes_read) |
| 259 | return event->params.recording_chunk.size; |
| 260 | |
| 261 | /* |
| 262 | * only part of the data relevant to this event was read. |
| 263 | * Update the event's information to reflect the new state. |
| 264 | */ |
| 265 | event->params.recording_chunk.size -= bytes_read; |
| 266 | event->params.recording_chunk.offset += bytes_read; |
| 267 | |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int dvb_dmxdev_add_event(struct dmxdev_events_queue *events, |
| 272 | struct dmx_filter_event *event) |
| 273 | { |
| 274 | int res; |
| 275 | int new_write_index; |
| 276 | int data_event; |
| 277 | |
| 278 | /* Check if the event is disabled */ |
| 279 | if (events->event_mask.disable_mask & event->type) |
| 280 | return 0; |
| 281 | |
| 282 | /* Check if we are adding an event that user already read its data */ |
| 283 | if (events->bytes_read_no_event) { |
| 284 | data_event = 1; |
| 285 | |
| 286 | if (event->type == DMX_EVENT_NEW_PES) |
| 287 | res = dvb_dmxdev_update_pes_event(event, |
| 288 | events->bytes_read_no_event); |
| 289 | else if (event->type == DMX_EVENT_NEW_SECTION) |
| 290 | res = dvb_dmxdev_update_section_event(event, |
| 291 | events->bytes_read_no_event); |
| 292 | else if (event->type == DMX_EVENT_NEW_REC_CHUNK) |
| 293 | res = dvb_dmxdev_update_rec_event(event, |
| 294 | events->bytes_read_no_event); |
| 295 | else |
| 296 | data_event = 0; |
| 297 | |
| 298 | if (data_event) { |
| 299 | if (res) { |
| 300 | /* |
| 301 | * Data relevant to this event was fully |
| 302 | * consumed already, discard event. |
| 303 | */ |
| 304 | events->bytes_read_no_event -= res; |
| 305 | return 0; |
| 306 | } |
| 307 | events->bytes_read_no_event = 0; |
| 308 | } else { |
| 309 | /* |
| 310 | * data was read beyond the non-data event, |
| 311 | * making it not relevant anymore |
| 312 | */ |
| 313 | return 0; |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | new_write_index = dvb_dmxdev_advance_event_idx(events->write_index); |
| 318 | if (new_write_index == events->read_index) { |
| 319 | pr_err("dmxdev: events overflow\n"); |
| 320 | return -EOVERFLOW; |
| 321 | } |
| 322 | |
| 323 | events->queue[events->write_index] = *event; |
| 324 | events->write_index = new_write_index; |
| 325 | |
| 326 | if (!(events->event_mask.no_wakeup_mask & event->type)) |
| 327 | events->wakeup_events_counter++; |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int dvb_dmxdev_remove_event(struct dmxdev_events_queue *events, |
| 333 | struct dmx_filter_event *event) |
| 334 | { |
| 335 | if (events->notified_index == events->write_index) |
| 336 | return -ENODATA; |
| 337 | |
| 338 | *event = events->queue[events->notified_index]; |
| 339 | |
| 340 | events->notified_index = |
| 341 | dvb_dmxdev_advance_event_idx(events->notified_index); |
| 342 | |
| 343 | if (!(events->event_mask.no_wakeup_mask & event->type)) |
| 344 | events->wakeup_events_counter--; |
| 345 | |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static int dvb_dmxdev_update_events(struct dmxdev_events_queue *events, |
| 350 | int bytes_read) |
| 351 | { |
| 352 | struct dmx_filter_event *event; |
| 353 | int res; |
| 354 | int data_event; |
| 355 | |
| 356 | /* |
| 357 | * If data events are not enabled on this filter, |
| 358 | * there's nothing to update. |
| 359 | */ |
| 360 | if (events->data_read_event_masked) |
| 361 | return 0; |
| 362 | |
| 363 | /* |
| 364 | * Go through all events that were notified and |
| 365 | * remove them from the events queue if their respective |
| 366 | * data was read. |
| 367 | */ |
| 368 | while ((events->read_index != events->notified_index) && |
| 369 | (bytes_read)) { |
| 370 | event = events->queue + events->read_index; |
| 371 | |
| 372 | data_event = 1; |
| 373 | |
| 374 | if (event->type == DMX_EVENT_NEW_PES) |
| 375 | res = dvb_dmxdev_update_pes_event(event, bytes_read); |
| 376 | else if (event->type == DMX_EVENT_NEW_SECTION) |
| 377 | res = dvb_dmxdev_update_section_event(event, |
| 378 | bytes_read); |
| 379 | else if (event->type == DMX_EVENT_NEW_REC_CHUNK) |
| 380 | res = dvb_dmxdev_update_rec_event(event, bytes_read); |
| 381 | else |
| 382 | data_event = 0; |
| 383 | |
| 384 | if (data_event) { |
| 385 | if (res) { |
| 386 | /* |
| 387 | * Data relevant to this event was |
| 388 | * fully consumed, remove it from the queue. |
| 389 | */ |
| 390 | bytes_read -= res; |
| 391 | events->read_index = |
| 392 | dvb_dmxdev_advance_event_idx( |
| 393 | events->read_index); |
| 394 | } else { |
| 395 | bytes_read = 0; |
| 396 | } |
| 397 | } else { |
| 398 | /* |
| 399 | * non-data event was already notified, |
| 400 | * no need to keep it |
| 401 | */ |
| 402 | events->read_index = dvb_dmxdev_advance_event_idx( |
| 403 | events->read_index); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | if (!bytes_read) |
| 408 | return 0; |
| 409 | |
| 410 | /* |
| 411 | * If we reached here it means: |
| 412 | * bytes_read != 0 |
| 413 | * events->read_index == events->notified_index |
| 414 | * Check if there are pending events in the queue |
| 415 | * which the user didn't read while their relevant data |
| 416 | * was read. |
| 417 | */ |
| 418 | while ((events->notified_index != events->write_index) && |
| 419 | (bytes_read)) { |
| 420 | event = events->queue + events->notified_index; |
| 421 | |
| 422 | data_event = 1; |
| 423 | |
| 424 | if (event->type == DMX_EVENT_NEW_PES) |
| 425 | res = dvb_dmxdev_update_pes_event(event, bytes_read); |
| 426 | else if (event->type == DMX_EVENT_NEW_SECTION) |
| 427 | res = dvb_dmxdev_update_section_event(event, |
| 428 | bytes_read); |
| 429 | else if (event->type == DMX_EVENT_NEW_REC_CHUNK) |
| 430 | res = dvb_dmxdev_update_rec_event(event, bytes_read); |
| 431 | else |
| 432 | data_event = 0; |
| 433 | |
| 434 | if (data_event) { |
| 435 | if (res) { |
| 436 | /* |
| 437 | * Data relevant to this event was |
| 438 | * fully consumed, remove it from the queue. |
| 439 | */ |
| 440 | bytes_read -= res; |
| 441 | events->notified_index = |
| 442 | dvb_dmxdev_advance_event_idx( |
| 443 | events->notified_index); |
| 444 | if (!(events->event_mask.no_wakeup_mask & |
| 445 | event->type)) |
| 446 | events->wakeup_events_counter--; |
| 447 | } else { |
| 448 | bytes_read = 0; |
| 449 | } |
| 450 | } else { |
Stephen Boyd | c52b854 | 2017-07-20 11:20:28 -0700 | [diff] [blame] | 451 | if (bytes_read) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 452 | /* |
| 453 | * data was read beyond the non-data event, |
| 454 | * making it not relevant anymore |
| 455 | */ |
| 456 | events->notified_index = |
| 457 | dvb_dmxdev_advance_event_idx( |
| 458 | events->notified_index); |
| 459 | if (!(events->event_mask.no_wakeup_mask & |
| 460 | event->type)) |
| 461 | events->wakeup_events_counter--; |
Stephen Boyd | c52b854 | 2017-07-20 11:20:28 -0700 | [diff] [blame] | 462 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | events->read_index = events->notified_index; |
| 466 | } |
| 467 | |
| 468 | /* |
| 469 | * Check if data was read without having a respective |
| 470 | * event in the events-queue |
| 471 | */ |
| 472 | if (bytes_read) |
| 473 | events->bytes_read_no_event += bytes_read; |
| 474 | |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static inline int dvb_dmxdev_check_data(struct dmxdev_filter *filter, |
| 479 | struct dvb_ringbuffer *src) |
| 480 | { |
| 481 | int data_status_change; |
| 482 | |
| 483 | if (filter) |
| 484 | if (mutex_lock_interruptible(&filter->mutex)) |
| 485 | return -ERESTARTSYS; |
| 486 | |
| 487 | if (!src->data || |
| 488 | !dvb_ringbuffer_empty(src) || |
| 489 | src->error || |
| 490 | (filter && |
| 491 | (filter->state != DMXDEV_STATE_GO) && |
| 492 | (filter->state != DMXDEV_STATE_DONE))) |
| 493 | data_status_change = 1; |
| 494 | else |
| 495 | data_status_change = 0; |
| 496 | |
| 497 | if (filter) |
| 498 | mutex_unlock(&filter->mutex); |
| 499 | |
| 500 | return data_status_change; |
| 501 | } |
| 502 | |
| 503 | static ssize_t dvb_dmxdev_buffer_read(struct dmxdev_filter *filter, |
| 504 | struct dvb_ringbuffer *src, |
| 505 | int non_blocking, char __user *buf, |
| 506 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | { |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 508 | size_t todo; |
| 509 | ssize_t avail; |
| 510 | ssize_t ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
| 512 | if (!src->data) |
| 513 | return 0; |
| 514 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 515 | if (src->error) { |
| 516 | ret = src->error; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 517 | src->error = 0; |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 518 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
| 520 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 521 | for (todo = count; todo > 0; todo -= ret) { |
| 522 | if (non_blocking && dvb_ringbuffer_empty(src)) { |
| 523 | ret = -EWOULDBLOCK; |
| 524 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | } |
| 526 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 527 | if (filter) { |
| 528 | if ((filter->state == DMXDEV_STATE_DONE) && |
| 529 | dvb_ringbuffer_empty(src)) |
| 530 | break; |
| 531 | |
| 532 | mutex_unlock(&filter->mutex); |
| 533 | } |
| 534 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 535 | ret = wait_event_interruptible(src->queue, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 536 | dvb_dmxdev_check_data(filter, src)); |
| 537 | |
| 538 | if (filter) { |
| 539 | if (mutex_lock_interruptible(&filter->mutex)) |
| 540 | return -ERESTARTSYS; |
| 541 | |
| 542 | if ((filter->state != DMXDEV_STATE_GO) && |
| 543 | (filter->state != DMXDEV_STATE_DONE)) |
| 544 | return -ENODEV; |
| 545 | } |
| 546 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 547 | if (ret < 0) |
| 548 | break; |
| 549 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 550 | if (!src->data) |
| 551 | return 0; |
| 552 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 553 | if (src->error) { |
| 554 | ret = src->error; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 555 | src->error = 0; |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 556 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | } |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 558 | |
| 559 | avail = dvb_ringbuffer_avail(src); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 560 | if (avail > todo) |
| 561 | avail = todo; |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 562 | |
Al Viro | b0ba0e3 | 2008-06-22 14:20:29 -0300 | [diff] [blame] | 563 | ret = dvb_ringbuffer_read_user(src, buf, avail); |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 564 | if (ret < 0) |
| 565 | break; |
| 566 | |
| 567 | buf += ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | } |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 569 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 570 | if (count - todo) /* some data was read? */ |
| 571 | wake_up_all(&src->queue); |
| 572 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 573 | return (count - todo) ? (count - todo) : ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 576 | static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | { |
| 578 | struct list_head *head, *pos; |
| 579 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 580 | head = demux->get_frontends(demux); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | if (!head) |
| 582 | return NULL; |
| 583 | list_for_each(pos, head) |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 584 | if (DMX_FE_ENTRY(pos)->source == type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | return DMX_FE_ENTRY(pos); |
| 586 | |
| 587 | return NULL; |
| 588 | } |
| 589 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 590 | static void dvb_dvr_oob_cmd(struct dmxdev *dmxdev, struct dmx_oob_command *cmd) |
| 591 | { |
| 592 | int i; |
| 593 | struct dmxdev_filter *filter; |
| 594 | struct dmxdev_feed *feed; |
| 595 | |
| 596 | for (i = 0; i < dmxdev->filternum; i++) { |
| 597 | filter = &dmxdev->filter[i]; |
| 598 | if (!filter || filter->state != DMXDEV_STATE_GO) |
| 599 | continue; |
| 600 | |
| 601 | switch (filter->type) { |
| 602 | case DMXDEV_TYPE_SEC: |
| 603 | filter->feed.sec.feed->oob_command( |
| 604 | filter->feed.sec.feed, cmd); |
| 605 | break; |
| 606 | case DMXDEV_TYPE_PES: |
| 607 | feed = list_first_entry(&filter->feed.ts, |
| 608 | struct dmxdev_feed, next); |
| 609 | feed->ts->oob_command(feed->ts, cmd); |
| 610 | break; |
| 611 | case DMXDEV_TYPE_NONE: |
| 612 | break; |
| 613 | default: |
| 614 | break; |
| 615 | } |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | static int dvb_dvr_feed_cmd(struct dmxdev *dmxdev, struct dvr_command *dvr_cmd) |
| 620 | { |
| 621 | int ret = 0; |
| 622 | size_t todo; |
| 623 | int bytes_written = 0; |
| 624 | size_t split; |
| 625 | size_t tsp_size; |
| 626 | u8 *data_start; |
| 627 | struct dvb_ringbuffer *src = &dmxdev->dvr_input_buffer; |
| 628 | |
| 629 | todo = dvr_cmd->cmd.data_feed_count; |
| 630 | |
| 631 | if (dmxdev->demux->get_tsp_size) |
| 632 | tsp_size = dmxdev->demux->get_tsp_size(dmxdev->demux); |
| 633 | else |
| 634 | tsp_size = 188; |
| 635 | |
| 636 | while (todo >= tsp_size) { |
| 637 | /* wait for input */ |
| 638 | ret = wait_event_interruptible( |
| 639 | src->queue, |
| 640 | (dvb_ringbuffer_avail(src) >= tsp_size) || |
| 641 | dmxdev->dvr_in_exit || src->error); |
| 642 | |
| 643 | if (ret < 0) |
| 644 | break; |
| 645 | |
| 646 | spin_lock(&dmxdev->dvr_in_lock); |
| 647 | |
| 648 | if (dmxdev->exit || dmxdev->dvr_in_exit) { |
| 649 | spin_unlock(&dmxdev->dvr_in_lock); |
| 650 | ret = -ENODEV; |
| 651 | break; |
| 652 | } |
| 653 | |
| 654 | if (src->error) { |
| 655 | spin_unlock(&dmxdev->dvr_in_lock); |
| 656 | wake_up_all(&src->queue); |
| 657 | ret = -EINVAL; |
| 658 | break; |
| 659 | } |
| 660 | |
| 661 | dmxdev->dvr_processing_input = 1; |
| 662 | |
| 663 | split = (src->pread + todo > src->size) ? |
| 664 | src->size - src->pread : 0; |
| 665 | |
| 666 | /* |
| 667 | * In DVR PULL mode, write might block. |
| 668 | * Lock on DVR buffer is released before calling to |
| 669 | * write, if DVR was released meanwhile, dvr_in_exit is |
| 670 | * prompted. Lock is acquired when updating the read pointer |
| 671 | * again to preserve read/write pointers consistency. |
| 672 | * |
| 673 | * In protected input mode, DVR input buffer is not mapped |
| 674 | * to kernel memory. Underlying demux implementation |
| 675 | * should trigger HW to read from DVR input buffer |
| 676 | * based on current read offset. |
| 677 | */ |
| 678 | if (split > 0) { |
| 679 | data_start = (dmxdev->demux->dvr_input_protected) ? |
| 680 | NULL : (src->data + src->pread); |
| 681 | |
| 682 | spin_unlock(&dmxdev->dvr_in_lock); |
| 683 | ret = dmxdev->demux->write(dmxdev->demux, |
| 684 | data_start, |
| 685 | split); |
| 686 | |
| 687 | if (ret < 0) { |
| 688 | pr_err("dmxdev: dvr write error %d\n", ret); |
| 689 | continue; |
| 690 | } |
| 691 | |
| 692 | if (dmxdev->dvr_in_exit) { |
| 693 | ret = -ENODEV; |
| 694 | break; |
| 695 | } |
| 696 | |
| 697 | spin_lock(&dmxdev->dvr_in_lock); |
| 698 | |
| 699 | todo -= ret; |
| 700 | bytes_written += ret; |
| 701 | DVB_RINGBUFFER_SKIP(src, ret); |
| 702 | if (ret < split) { |
| 703 | dmxdev->dvr_processing_input = 0; |
| 704 | spin_unlock(&dmxdev->dvr_in_lock); |
| 705 | wake_up_all(&src->queue); |
| 706 | continue; |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | data_start = (dmxdev->demux->dvr_input_protected) ? |
| 711 | NULL : (src->data + src->pread); |
| 712 | |
| 713 | spin_unlock(&dmxdev->dvr_in_lock); |
| 714 | ret = dmxdev->demux->write(dmxdev->demux, |
| 715 | data_start, todo); |
| 716 | |
| 717 | if (ret < 0) { |
| 718 | pr_err("dmxdev: dvr write error %d\n", ret); |
| 719 | continue; |
| 720 | } |
| 721 | |
| 722 | if (dmxdev->dvr_in_exit) { |
| 723 | ret = -ENODEV; |
| 724 | break; |
| 725 | } |
| 726 | |
| 727 | spin_lock(&dmxdev->dvr_in_lock); |
| 728 | |
| 729 | todo -= ret; |
| 730 | bytes_written += ret; |
| 731 | DVB_RINGBUFFER_SKIP(src, ret); |
| 732 | dmxdev->dvr_processing_input = 0; |
| 733 | spin_unlock(&dmxdev->dvr_in_lock); |
| 734 | |
| 735 | wake_up_all(&src->queue); |
| 736 | } |
| 737 | |
| 738 | if (ret < 0) |
| 739 | return ret; |
| 740 | |
| 741 | return bytes_written; |
| 742 | } |
| 743 | |
| 744 | static int dvr_input_thread_entry(void *arg) |
| 745 | { |
| 746 | struct dmxdev *dmxdev = arg; |
| 747 | struct dvb_ringbuffer *cmdbuf = &dmxdev->dvr_cmd_buffer; |
| 748 | struct dvr_command dvr_cmd; |
| 749 | int leftover = 0; |
| 750 | int ret; |
| 751 | |
| 752 | while (1) { |
| 753 | /* wait for input */ |
| 754 | ret = wait_event_interruptible( |
| 755 | cmdbuf->queue, |
| 756 | (!cmdbuf->data) || |
| 757 | (dvb_ringbuffer_avail(cmdbuf) >= sizeof(dvr_cmd)) || |
| 758 | (dmxdev->dvr_in_exit)); |
| 759 | |
| 760 | if (ret < 0) |
| 761 | break; |
| 762 | |
| 763 | spin_lock(&dmxdev->dvr_in_lock); |
| 764 | |
| 765 | if (!cmdbuf->data || dmxdev->exit || dmxdev->dvr_in_exit) { |
| 766 | spin_unlock(&dmxdev->dvr_in_lock); |
| 767 | break; |
| 768 | } |
| 769 | |
| 770 | dvb_ringbuffer_read(cmdbuf, (u8 *)&dvr_cmd, sizeof(dvr_cmd)); |
| 771 | |
| 772 | spin_unlock(&dmxdev->dvr_in_lock); |
| 773 | |
| 774 | if (dvr_cmd.type == DVR_DATA_FEED_CMD) { |
| 775 | dvr_cmd.cmd.data_feed_count += leftover; |
| 776 | |
| 777 | ret = dvb_dvr_feed_cmd(dmxdev, &dvr_cmd); |
| 778 | if (ret < 0) { |
| 779 | pr_debug("%s: DVR data feed failed, ret=%d\n", |
| 780 | __func__, ret); |
| 781 | continue; |
| 782 | } |
| 783 | |
| 784 | leftover = dvr_cmd.cmd.data_feed_count - ret; |
| 785 | } else { |
| 786 | /* |
| 787 | * For EOS, try to process leftover data in the input |
| 788 | * buffer. |
| 789 | */ |
| 790 | if (dvr_cmd.cmd.oobcmd.type == DMX_OOB_CMD_EOS) { |
| 791 | struct dvr_command feed_cmd; |
| 792 | |
| 793 | feed_cmd.type = DVR_DATA_FEED_CMD; |
| 794 | feed_cmd.cmd.data_feed_count = |
| 795 | dvb_ringbuffer_avail( |
| 796 | &dmxdev->dvr_input_buffer); |
| 797 | dvb_dvr_feed_cmd(dmxdev, &feed_cmd); |
| 798 | } |
| 799 | |
| 800 | dvb_dvr_oob_cmd(dmxdev, &dvr_cmd.cmd.oobcmd); |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | set_current_state(TASK_INTERRUPTIBLE); |
| 805 | while (!kthread_should_stop()) { |
| 806 | schedule(); |
| 807 | set_current_state(TASK_INTERRUPTIBLE); |
| 808 | } |
| 809 | set_current_state(TASK_RUNNING); |
| 810 | |
| 811 | return 0; |
| 812 | } |
| 813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | static int dvb_dvr_open(struct inode *inode, struct file *file) |
| 815 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 816 | struct dvb_device *dvbdev = file->private_data; |
| 817 | struct dmxdev *dmxdev = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | struct dmx_frontend *front; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 819 | void *mem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 821 | pr_debug("function : %s(%X)\n", __func__, (file->f_flags & O_ACCMODE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 823 | if (mutex_lock_interruptible(&dmxdev->mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | return -ERESTARTSYS; |
| 825 | |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 826 | if (dmxdev->exit) { |
| 827 | mutex_unlock(&dmxdev->mutex); |
| 828 | return -ENODEV; |
| 829 | } |
| 830 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 831 | if ((file->f_flags & O_ACCMODE) == O_RDWR) { |
| 832 | if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) { |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 833 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | return -EOPNOTSUPP; |
| 835 | } |
| 836 | } |
| 837 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 838 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { |
Trent Piepho | 5e85bd0 | 2006-03-30 15:53:32 -0300 | [diff] [blame] | 839 | if (!dvbdev->readers) { |
| 840 | mutex_unlock(&dmxdev->mutex); |
| 841 | return -EBUSY; |
| 842 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 843 | mem = vmalloc_user(DVR_BUFFER_SIZE); |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 844 | if (!mem) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 845 | mutex_unlock(&dmxdev->mutex); |
| 846 | return -ENOMEM; |
| 847 | } |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 848 | dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 849 | dvb_dmxdev_flush_events(&dmxdev->dvr_output_events); |
| 850 | dmxdev->dvr_output_events.event_mask.disable_mask = 0; |
| 851 | dmxdev->dvr_output_events.event_mask.no_wakeup_mask = 0; |
| 852 | dmxdev->dvr_output_events.event_mask.wakeup_threshold = 1; |
| 853 | dmxdev->dvr_feeds_count = 0; |
| 854 | dmxdev->dvr_buffer_mode = DMX_BUFFER_MODE_INTERNAL; |
| 855 | dmxdev->dvr_priv_buff_handle = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 857 | dvbdev->readers--; |
| 858 | } else if (!dvbdev->writers) { |
| 859 | dmxdev->dvr_in_exit = 0; |
| 860 | dmxdev->dvr_processing_input = 0; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 861 | dmxdev->dvr_orig_fe = dmxdev->demux->frontend; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | |
| 863 | if (!dmxdev->demux->write) { |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 864 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | return -EOPNOTSUPP; |
| 866 | } |
| 867 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 868 | front = get_fe(dmxdev->demux, DMX_MEMORY_FE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
| 870 | if (!front) { |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 871 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | return -EINVAL; |
| 873 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 874 | |
| 875 | mem = vmalloc_user(DVR_BUFFER_SIZE); |
| 876 | if (!mem) { |
| 877 | mutex_unlock(&dmxdev->mutex); |
| 878 | return -ENOMEM; |
| 879 | } |
| 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | dmxdev->demux->disconnect_frontend(dmxdev->demux); |
| 882 | dmxdev->demux->connect_frontend(dmxdev->demux, front); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 883 | dmxdev->dvr_input_buffer_mode = DMX_BUFFER_MODE_INTERNAL; |
| 884 | |
| 885 | dvb_ringbuffer_init(&dmxdev->dvr_input_buffer, |
| 886 | mem, |
| 887 | DVR_BUFFER_SIZE); |
| 888 | |
| 889 | dmxdev->demux->dvr_input.priv_handle = NULL; |
| 890 | dmxdev->demux->dvr_input.ringbuff = &dmxdev->dvr_input_buffer; |
| 891 | dmxdev->demux->dvr_input_protected = 0; |
| 892 | mem = vmalloc(DVR_CMDS_BUFFER_SIZE); |
| 893 | if (!mem) { |
| 894 | vfree(dmxdev->dvr_input_buffer.data); |
| 895 | dmxdev->dvr_input_buffer.data = NULL; |
| 896 | mutex_unlock(&dmxdev->mutex); |
| 897 | return -ENOMEM; |
| 898 | } |
| 899 | dvb_ringbuffer_init(&dmxdev->dvr_cmd_buffer, mem, |
| 900 | DVR_CMDS_BUFFER_SIZE); |
| 901 | dvbdev->writers--; |
| 902 | |
| 903 | dmxdev->dvr_input_thread = |
| 904 | kthread_run( |
| 905 | dvr_input_thread_entry, |
| 906 | (void *)dmxdev, |
| 907 | "dvr_input"); |
| 908 | |
| 909 | if (IS_ERR(dmxdev->dvr_input_thread)) { |
| 910 | vfree(dmxdev->dvr_input_buffer.data); |
| 911 | vfree(dmxdev->dvr_cmd_buffer.data); |
| 912 | dmxdev->dvr_input_buffer.data = NULL; |
| 913 | dmxdev->dvr_cmd_buffer.data = NULL; |
| 914 | mutex_unlock(&dmxdev->mutex); |
| 915 | return -ENOMEM; |
| 916 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 918 | |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 919 | dvbdev->users++; |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 920 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | return 0; |
| 922 | } |
| 923 | |
| 924 | static int dvb_dvr_release(struct inode *inode, struct file *file) |
| 925 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 926 | struct dvb_device *dvbdev = file->private_data; |
| 927 | struct dmxdev *dmxdev = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | |
Simon Arlott | c278850 | 2007-03-10 06:21:25 -0300 | [diff] [blame] | 929 | mutex_lock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 931 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { |
Trent Piepho | 5e85bd0 | 2006-03-30 15:53:32 -0300 | [diff] [blame] | 932 | dvbdev->readers++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | if (dmxdev->dvr_buffer.data) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 934 | void *mem = dmxdev->dvr_buffer.data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | mb(); |
| 936 | spin_lock_irq(&dmxdev->lock); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 937 | dmxdev->dvr_buffer.data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | spin_unlock_irq(&dmxdev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 939 | wake_up_all(&dmxdev->dvr_buffer.queue); |
| 940 | |
| 941 | if (dmxdev->dvr_buffer_mode == DMX_BUFFER_MODE_INTERNAL) |
| 942 | vfree(mem); |
| 943 | } |
| 944 | |
| 945 | if ((dmxdev->dvr_buffer_mode == DMX_BUFFER_MODE_EXTERNAL) && |
| 946 | dmxdev->dvr_priv_buff_handle) { |
| 947 | dmxdev->demux->unmap_buffer(dmxdev->demux, |
| 948 | dmxdev->dvr_priv_buff_handle); |
| 949 | dmxdev->dvr_priv_buff_handle = NULL; |
| 950 | } |
| 951 | } else { |
| 952 | int i; |
| 953 | |
| 954 | spin_lock(&dmxdev->dvr_in_lock); |
| 955 | dmxdev->dvr_in_exit = 1; |
| 956 | spin_unlock(&dmxdev->dvr_in_lock); |
| 957 | |
| 958 | wake_up_all(&dmxdev->dvr_cmd_buffer.queue); |
| 959 | |
| 960 | /* |
| 961 | * There might be dmx filters reading now from DVR |
| 962 | * device, in PULL mode, they might be also stalled |
| 963 | * on output, signal to them that DVR is exiting. |
| 964 | */ |
| 965 | if (dmxdev->playback_mode == DMX_PB_MODE_PULL) { |
| 966 | wake_up_all(&dmxdev->dvr_buffer.queue); |
| 967 | |
| 968 | for (i = 0; i < dmxdev->filternum; i++) |
| 969 | if (dmxdev->filter[i].state == DMXDEV_STATE_GO) |
| 970 | wake_up_all( |
| 971 | &dmxdev->filter[i].buffer.queue); |
| 972 | } |
| 973 | |
| 974 | /* notify kernel demux that we are canceling */ |
| 975 | if (dmxdev->demux->write_cancel) |
| 976 | dmxdev->demux->write_cancel(dmxdev->demux); |
| 977 | |
| 978 | /* |
| 979 | * Now stop dvr-input thread so that no one |
| 980 | * would process data from dvr input buffer any more |
| 981 | * before it gets freed. |
| 982 | */ |
| 983 | kthread_stop(dmxdev->dvr_input_thread); |
| 984 | |
| 985 | dvbdev->writers++; |
| 986 | dmxdev->demux->disconnect_frontend(dmxdev->demux); |
| 987 | dmxdev->demux->connect_frontend(dmxdev->demux, |
| 988 | dmxdev->dvr_orig_fe); |
| 989 | |
| 990 | if (dmxdev->dvr_input_buffer.data) { |
| 991 | void *mem = dmxdev->dvr_input_buffer.data; |
| 992 | /* |
| 993 | * Ensure all the operations on the DVR input buffer |
| 994 | * are completed before it gets freed. |
| 995 | */ |
| 996 | mb(); |
| 997 | spin_lock_irq(&dmxdev->dvr_in_lock); |
| 998 | dmxdev->dvr_input_buffer.data = NULL; |
| 999 | spin_unlock_irq(&dmxdev->dvr_in_lock); |
| 1000 | |
| 1001 | if (dmxdev->dvr_input_buffer_mode == |
| 1002 | DMX_BUFFER_MODE_INTERNAL) |
| 1003 | vfree(mem); |
| 1004 | } |
| 1005 | |
| 1006 | if ((dmxdev->dvr_input_buffer_mode == |
| 1007 | DMX_BUFFER_MODE_EXTERNAL) && |
| 1008 | (dmxdev->demux->dvr_input.priv_handle)) { |
| 1009 | if (!dmxdev->demux->dvr_input_protected) |
| 1010 | dmxdev->demux->unmap_buffer(dmxdev->demux, |
| 1011 | dmxdev->demux->dvr_input.priv_handle); |
| 1012 | dmxdev->demux->dvr_input.priv_handle = NULL; |
| 1013 | } |
| 1014 | |
| 1015 | if (dmxdev->dvr_cmd_buffer.data) { |
| 1016 | void *mem = dmxdev->dvr_cmd_buffer.data; |
| 1017 | /* |
| 1018 | * Ensure all the operations on the DVR command buffer |
| 1019 | * are completed before it gets freed. |
| 1020 | */ |
| 1021 | mb(); |
| 1022 | spin_lock_irq(&dmxdev->dvr_in_lock); |
| 1023 | dmxdev->dvr_cmd_buffer.data = NULL; |
| 1024 | spin_unlock_irq(&dmxdev->dvr_in_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | vfree(mem); |
| 1026 | } |
| 1027 | } |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 1028 | /* TODO */ |
| 1029 | dvbdev->users--; |
Jiri Slaby | 1c488ea | 2010-07-18 15:34:18 -0300 | [diff] [blame] | 1030 | if (dvbdev->users == 1 && dmxdev->exit == 1) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1031 | fops_put(file->f_op); |
| 1032 | file->f_op = NULL; |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 1033 | mutex_unlock(&dmxdev->mutex); |
| 1034 | wake_up(&dvbdev->wait_queue); |
| 1035 | } else |
| 1036 | mutex_unlock(&dmxdev->mutex); |
| 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | return 0; |
| 1039 | } |
| 1040 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1041 | |
| 1042 | static int dvb_dvr_mmap(struct file *filp, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1044 | struct dvb_device *dvbdev = filp->private_data; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1045 | struct dmxdev *dmxdev = dvbdev->priv; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1046 | struct dvb_ringbuffer *buffer; |
| 1047 | enum dmx_buffer_mode buffer_mode; |
| 1048 | int vma_size; |
| 1049 | int buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | int ret; |
| 1051 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1052 | if (((filp->f_flags & O_ACCMODE) == O_RDONLY) && |
| 1053 | (vma->vm_flags & VM_WRITE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | return -EINVAL; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1055 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 1056 | if (mutex_lock_interruptible(&dmxdev->mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | return -ERESTARTSYS; |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 1058 | |
| 1059 | if (dmxdev->exit) { |
| 1060 | mutex_unlock(&dmxdev->mutex); |
| 1061 | return -ENODEV; |
| 1062 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1063 | |
| 1064 | if ((filp->f_flags & O_ACCMODE) == O_RDONLY) { |
| 1065 | buffer = &dmxdev->dvr_buffer; |
| 1066 | buffer_mode = dmxdev->dvr_buffer_mode; |
| 1067 | } else { |
| 1068 | buffer = &dmxdev->dvr_input_buffer; |
| 1069 | buffer_mode = dmxdev->dvr_input_buffer_mode; |
| 1070 | } |
| 1071 | |
| 1072 | if (buffer_mode == DMX_BUFFER_MODE_EXTERNAL) { |
| 1073 | mutex_unlock(&dmxdev->mutex); |
| 1074 | return -EINVAL; |
| 1075 | } |
| 1076 | |
| 1077 | vma_size = vma->vm_end - vma->vm_start; |
| 1078 | |
| 1079 | /* Make sure requested mapping is not larger than buffer size */ |
| 1080 | buffer_size = buffer->size + (PAGE_SIZE-1); |
| 1081 | buffer_size = buffer_size & ~(PAGE_SIZE-1); |
| 1082 | |
| 1083 | if (vma_size != buffer_size) { |
| 1084 | mutex_unlock(&dmxdev->mutex); |
| 1085 | return -EINVAL; |
| 1086 | } |
| 1087 | |
| 1088 | ret = remap_vmalloc_range(vma, buffer->data, 0); |
| 1089 | if (ret) { |
| 1090 | mutex_unlock(&dmxdev->mutex); |
| 1091 | return ret; |
| 1092 | } |
| 1093 | |
| 1094 | vma->vm_flags |= VM_DONTDUMP; |
| 1095 | vma->vm_flags |= VM_DONTEXPAND; |
| 1096 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 1097 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | return ret; |
| 1099 | } |
| 1100 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1101 | static void dvb_dvr_queue_data_feed(struct dmxdev *dmxdev, size_t count) |
| 1102 | { |
| 1103 | struct dvb_ringbuffer *cmdbuf = &dmxdev->dvr_cmd_buffer; |
| 1104 | struct dvr_command *dvr_cmd; |
| 1105 | int last_dvr_cmd; |
| 1106 | |
| 1107 | spin_lock(&dmxdev->dvr_in_lock); |
| 1108 | |
| 1109 | /* Peek at the last DVR command queued, try to coalesce FEED commands */ |
| 1110 | if (dvb_ringbuffer_avail(cmdbuf) >= sizeof(*dvr_cmd)) { |
| 1111 | last_dvr_cmd = cmdbuf->pwrite - sizeof(*dvr_cmd); |
| 1112 | if (last_dvr_cmd < 0) |
| 1113 | last_dvr_cmd += cmdbuf->size; |
| 1114 | |
| 1115 | dvr_cmd = (struct dvr_command *)&cmdbuf->data[last_dvr_cmd]; |
| 1116 | if (dvr_cmd->type == DVR_DATA_FEED_CMD) { |
| 1117 | dvr_cmd->cmd.data_feed_count += count; |
| 1118 | spin_unlock(&dmxdev->dvr_in_lock); |
| 1119 | return; |
| 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | /* |
| 1124 | * We assume command buffer is large enough so that overflow should not |
| 1125 | * happen. Overflow to the command buffer means data previously written |
| 1126 | * to the input buffer is 'orphan' - does not have a matching FEED |
| 1127 | * command. Issue a warning if this ever happens. |
| 1128 | * Orphan data might still be processed if EOS is issued. |
| 1129 | */ |
| 1130 | if (dvb_ringbuffer_free(cmdbuf) < sizeof(*dvr_cmd)) { |
| 1131 | pr_err("%s: DVR command buffer overflow\n", __func__); |
| 1132 | spin_unlock(&dmxdev->dvr_in_lock); |
| 1133 | return; |
| 1134 | } |
| 1135 | |
| 1136 | dvr_cmd = (struct dvr_command *)&cmdbuf->data[cmdbuf->pwrite]; |
| 1137 | dvr_cmd->type = DVR_DATA_FEED_CMD; |
| 1138 | dvr_cmd->cmd.data_feed_count = count; |
| 1139 | DVB_RINGBUFFER_PUSH(cmdbuf, sizeof(*dvr_cmd)); |
| 1140 | spin_unlock(&dmxdev->dvr_in_lock); |
| 1141 | |
| 1142 | wake_up_all(&cmdbuf->queue); |
| 1143 | } |
| 1144 | |
| 1145 | static int dvb_dvr_external_input_only(struct dmxdev *dmxdev) |
| 1146 | { |
| 1147 | struct dmx_caps caps; |
| 1148 | int is_external_only; |
| 1149 | int flags; |
| 1150 | size_t tsp_size; |
| 1151 | |
| 1152 | if (dmxdev->demux->get_tsp_size) |
| 1153 | tsp_size = dmxdev->demux->get_tsp_size(dmxdev->demux); |
| 1154 | else |
| 1155 | tsp_size = 188; |
| 1156 | |
| 1157 | /* |
| 1158 | * For backward compatibility, default assumes that |
| 1159 | * external only buffers are not supported. |
| 1160 | */ |
| 1161 | flags = 0; |
| 1162 | if (dmxdev->demux->get_caps) { |
| 1163 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 1164 | |
| 1165 | if (tsp_size == 188) |
| 1166 | flags = caps.playback_188_tsp.flags; |
| 1167 | else |
| 1168 | flags = caps.playback_192_tsp.flags; |
| 1169 | } |
| 1170 | |
| 1171 | if (!(flags & DMX_BUFFER_INTERNAL_SUPPORT) && |
| 1172 | (flags & DMX_BUFFER_EXTERNAL_SUPPORT)) |
| 1173 | is_external_only = 1; |
| 1174 | else |
| 1175 | is_external_only = 0; |
| 1176 | |
| 1177 | return is_external_only; |
| 1178 | } |
| 1179 | |
| 1180 | static int dvb_dvr_verify_buffer_size(struct dmxdev *dmxdev, |
| 1181 | unsigned int f_flags, |
| 1182 | unsigned long size) |
| 1183 | { |
| 1184 | struct dmx_caps caps; |
| 1185 | int tsp_size; |
| 1186 | |
| 1187 | if (!dmxdev->demux->get_caps) |
| 1188 | return 1; |
| 1189 | |
| 1190 | if (dmxdev->demux->get_tsp_size) |
| 1191 | tsp_size = dmxdev->demux->get_tsp_size(dmxdev->demux); |
| 1192 | else |
| 1193 | tsp_size = 188; |
| 1194 | |
| 1195 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 1196 | if ((f_flags & O_ACCMODE) == O_RDONLY) |
| 1197 | return (tsp_size == 188 && dvb_dmxdev_verify_buffer_size(size, |
| 1198 | caps.recording_188_tsp.max_size, |
| 1199 | caps.recording_188_tsp.size_alignment)) || |
| 1200 | (tsp_size == 192 && dvb_dmxdev_verify_buffer_size(size, |
| 1201 | caps.recording_192_tsp.max_size, |
| 1202 | caps.recording_192_tsp.size_alignment)); |
| 1203 | |
| 1204 | return (tsp_size == 188 && dvb_dmxdev_verify_buffer_size(size, |
| 1205 | caps.playback_188_tsp.max_size, |
| 1206 | caps.playback_188_tsp.size_alignment)) || |
| 1207 | (tsp_size == 192 && dvb_dmxdev_verify_buffer_size(size, |
| 1208 | caps.playback_192_tsp.max_size, |
| 1209 | caps.playback_192_tsp.size_alignment)); |
| 1210 | } |
| 1211 | |
| 1212 | static ssize_t dvb_dvr_write(struct file *file, const char __user *buf, |
| 1213 | size_t count, loff_t *ppos) |
| 1214 | { |
| 1215 | struct dvb_device *dvbdev = file->private_data; |
| 1216 | struct dmxdev *dmxdev = dvbdev->priv; |
| 1217 | struct dvb_ringbuffer *src = &dmxdev->dvr_input_buffer; |
| 1218 | struct dvb_ringbuffer *cmdbuf = &dmxdev->dvr_cmd_buffer; |
| 1219 | int ret; |
| 1220 | size_t todo; |
| 1221 | ssize_t free_space; |
| 1222 | |
| 1223 | if (!dmxdev->demux->write) |
| 1224 | return -EOPNOTSUPP; |
| 1225 | |
| 1226 | if (!dvb_dvr_verify_buffer_size(dmxdev, file->f_flags, src->size) || |
| 1227 | ((file->f_flags & O_ACCMODE) == O_RDONLY) || |
| 1228 | !src->data || !cmdbuf->data || |
| 1229 | (dvb_dvr_external_input_only(dmxdev) && |
| 1230 | (dmxdev->dvr_input_buffer_mode == DMX_BUFFER_MODE_INTERNAL))) |
| 1231 | return -EINVAL; |
| 1232 | |
| 1233 | if ((file->f_flags & O_NONBLOCK) && |
| 1234 | (dvb_ringbuffer_free(src) == 0)) |
| 1235 | return -EWOULDBLOCK; |
| 1236 | |
| 1237 | ret = 0; |
| 1238 | for (todo = count; todo > 0; todo -= ret) { |
| 1239 | ret = wait_event_interruptible(src->queue, |
| 1240 | (dvb_ringbuffer_free(src)) || |
| 1241 | !src->data || !cmdbuf->data || |
| 1242 | (src->error != 0) || dmxdev->dvr_in_exit); |
| 1243 | |
| 1244 | if (ret < 0) |
| 1245 | return ret; |
| 1246 | |
| 1247 | if (mutex_lock_interruptible(&dmxdev->mutex)) |
| 1248 | return -ERESTARTSYS; |
| 1249 | |
| 1250 | if ((!src->data) || (!cmdbuf->data)) { |
| 1251 | mutex_unlock(&dmxdev->mutex); |
| 1252 | return 0; |
| 1253 | } |
| 1254 | |
| 1255 | if (dmxdev->exit || dmxdev->dvr_in_exit) { |
| 1256 | mutex_unlock(&dmxdev->mutex); |
| 1257 | return -ENODEV; |
| 1258 | } |
| 1259 | |
| 1260 | if (src->error) { |
| 1261 | ret = src->error; |
| 1262 | dvb_ringbuffer_flush(src); |
| 1263 | mutex_unlock(&dmxdev->mutex); |
| 1264 | wake_up_all(&src->queue); |
| 1265 | return ret; |
| 1266 | } |
| 1267 | |
| 1268 | free_space = dvb_ringbuffer_free(src); |
| 1269 | |
| 1270 | if (free_space > todo) |
| 1271 | free_space = todo; |
| 1272 | |
| 1273 | ret = dvb_ringbuffer_write_user(src, buf, free_space); |
| 1274 | |
| 1275 | if (ret < 0) { |
| 1276 | mutex_unlock(&dmxdev->mutex); |
| 1277 | return ret; |
| 1278 | } |
| 1279 | |
| 1280 | buf += ret; |
| 1281 | |
| 1282 | dvb_dvr_queue_data_feed(dmxdev, ret); |
| 1283 | |
| 1284 | mutex_unlock(&dmxdev->mutex); |
| 1285 | } |
| 1286 | |
| 1287 | return (count - todo) ? (count - todo) : ret; |
| 1288 | } |
| 1289 | |
| 1290 | static int dvb_dmxdev_flush_data(struct dmxdev_filter *filter, size_t length) |
| 1291 | { |
| 1292 | int ret = 0; |
| 1293 | unsigned long flags; |
| 1294 | |
| 1295 | struct dvb_ringbuffer *buffer = &filter->buffer; |
| 1296 | struct dmxdev_events_queue *events = &filter->events; |
| 1297 | |
| 1298 | if (filter->type == DMXDEV_TYPE_PES && |
| 1299 | filter->params.pes.output == DMX_OUT_TS_TAP) { |
| 1300 | buffer = &filter->dev->dvr_buffer; |
| 1301 | events = &filter->dev->dvr_output_events; |
| 1302 | } |
| 1303 | |
| 1304 | /* |
| 1305 | * Drop 'length' pending data bytes from the ringbuffer and update |
| 1306 | * event queue accordingly, similarly to dvb_dmxdev_release_data(). |
| 1307 | */ |
| 1308 | spin_lock_irqsave(&filter->dev->lock, flags); |
| 1309 | DVB_RINGBUFFER_SKIP(buffer, length); |
| 1310 | buffer->error = 0; |
| 1311 | dvb_dmxdev_flush_events(events); |
| 1312 | events->current_event_start_offset = buffer->pwrite; |
| 1313 | spin_unlock_irqrestore(&filter->dev->lock, flags); |
| 1314 | |
| 1315 | if (filter->type == DMXDEV_TYPE_PES) { |
| 1316 | struct dmxdev_feed *feed; |
| 1317 | |
| 1318 | feed = list_first_entry(&filter->feed.ts, |
| 1319 | struct dmxdev_feed, next); |
| 1320 | |
| 1321 | if (feed->ts->flush_buffer) |
| 1322 | return feed->ts->flush_buffer(feed->ts, length); |
| 1323 | } else if (filter->type == DMXDEV_TYPE_SEC && |
| 1324 | filter->feed.sec.feed->flush_buffer) { |
| 1325 | return filter->feed.sec.feed->flush_buffer( |
| 1326 | filter->feed.sec.feed, length); |
| 1327 | } |
| 1328 | |
| 1329 | return ret; |
| 1330 | } |
| 1331 | |
| 1332 | static inline void dvb_dmxdev_auto_flush_buffer(struct dmxdev_filter *filter, |
| 1333 | struct dvb_ringbuffer *buf) |
| 1334 | { |
| 1335 | size_t flush_len; |
| 1336 | |
| 1337 | /* |
| 1338 | * When buffer overflowed, demux-dev marked the buffer in |
| 1339 | * error state. If auto-flush is enabled discard current |
| 1340 | * pending data in buffer. |
| 1341 | */ |
| 1342 | if (overflow_auto_flush) { |
| 1343 | flush_len = dvb_ringbuffer_avail(buf); |
| 1344 | dvb_dmxdev_flush_data(filter, flush_len); |
| 1345 | } |
| 1346 | } |
| 1347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 1349 | loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1351 | ssize_t res; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1352 | struct dvb_device *dvbdev = file->private_data; |
| 1353 | struct dmxdev *dmxdev = dvbdev->priv; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1354 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | |
Simon Arlott | eda9f75 | 2009-05-12 17:39:28 -0300 | [diff] [blame] | 1356 | if (dmxdev->exit) |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 1357 | return -ENODEV; |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 1358 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1359 | if (!dvb_dvr_verify_buffer_size(dmxdev, file->f_flags, |
| 1360 | dmxdev->dvr_buffer.size)) |
| 1361 | return -EINVAL; |
| 1362 | |
| 1363 | res = dvb_dmxdev_buffer_read(NULL, &dmxdev->dvr_buffer, |
| 1364 | file->f_flags & O_NONBLOCK, |
| 1365 | buf, count, ppos); |
| 1366 | |
| 1367 | if (res > 0) { |
| 1368 | dvb_dmxdev_notify_data_read(dmxdev->dvr_feed, res); |
| 1369 | spin_lock_irqsave(&dmxdev->lock, flags); |
| 1370 | dvb_dmxdev_update_events(&dmxdev->dvr_output_events, res); |
| 1371 | spin_unlock_irqrestore(&dmxdev->lock, flags); |
| 1372 | |
| 1373 | /* |
| 1374 | * in PULL mode, we might be stalling on |
| 1375 | * event queue, so need to wake-up waiters |
| 1376 | */ |
| 1377 | if (dmxdev->playback_mode == DMX_PB_MODE_PULL) |
| 1378 | wake_up_all(&dmxdev->dvr_buffer.queue); |
| 1379 | } else if (res == -EOVERFLOW) { |
| 1380 | dvb_dmxdev_auto_flush_buffer(dmxdev->dvr_feed, |
| 1381 | &dmxdev->dvr_buffer); |
| 1382 | } |
| 1383 | |
| 1384 | return res; |
| 1385 | } |
| 1386 | |
| 1387 | /* |
| 1388 | * dvb_dvr_push_oob_cmd |
| 1389 | * |
| 1390 | * Note: this function assume dmxdev->mutex was taken, so command buffer cannot |
| 1391 | * be released during its operation. |
| 1392 | */ |
| 1393 | static int dvb_dvr_push_oob_cmd(struct dmxdev *dmxdev, unsigned int f_flags, |
| 1394 | struct dmx_oob_command *cmd) |
| 1395 | { |
| 1396 | struct dvb_ringbuffer *cmdbuf = &dmxdev->dvr_cmd_buffer; |
| 1397 | struct dvr_command *dvr_cmd; |
| 1398 | |
| 1399 | if ((f_flags & O_ACCMODE) == O_RDONLY || |
| 1400 | dmxdev->source < DMX_SOURCE_DVR0) |
| 1401 | return -EPERM; |
| 1402 | |
| 1403 | if (dvb_ringbuffer_free(cmdbuf) < sizeof(*dvr_cmd)) |
| 1404 | return -ENOMEM; |
| 1405 | |
| 1406 | dvr_cmd = (struct dvr_command *)&cmdbuf->data[cmdbuf->pwrite]; |
| 1407 | dvr_cmd->type = DVR_OOB_CMD; |
| 1408 | dvr_cmd->cmd.oobcmd = *cmd; |
| 1409 | DVB_RINGBUFFER_PUSH(cmdbuf, sizeof(*dvr_cmd)); |
| 1410 | wake_up_all(&cmdbuf->queue); |
| 1411 | |
| 1412 | return 0; |
| 1413 | } |
| 1414 | |
| 1415 | static int dvb_dvr_flush_buffer(struct dmxdev *dmxdev, unsigned int f_flags) |
| 1416 | { |
| 1417 | size_t flush_len; |
| 1418 | int ret; |
| 1419 | |
| 1420 | if ((f_flags & O_ACCMODE) != O_RDONLY) |
| 1421 | return -EINVAL; |
| 1422 | |
| 1423 | flush_len = dvb_ringbuffer_avail(&dmxdev->dvr_buffer); |
| 1424 | ret = dvb_dmxdev_flush_data(dmxdev->dvr_feed, flush_len); |
| 1425 | |
| 1426 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | } |
| 1428 | |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1429 | static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1430 | unsigned int f_flags, |
| 1431 | unsigned long size) |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1432 | { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1433 | struct dvb_ringbuffer *buf; |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1434 | void *newmem; |
| 1435 | void *oldmem; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1436 | spinlock_t *lock; |
| 1437 | enum dmx_buffer_mode buffer_mode; |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1438 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1439 | pr_debug("function : %s\n", __func__); |
| 1440 | |
| 1441 | if ((f_flags & O_ACCMODE) == O_RDONLY) { |
| 1442 | buf = &dmxdev->dvr_buffer; |
| 1443 | lock = &dmxdev->lock; |
| 1444 | buffer_mode = dmxdev->dvr_buffer_mode; |
| 1445 | } else { |
| 1446 | buf = &dmxdev->dvr_input_buffer; |
| 1447 | lock = &dmxdev->dvr_in_lock; |
| 1448 | buffer_mode = dmxdev->dvr_input_buffer_mode; |
| 1449 | } |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1450 | |
| 1451 | if (buf->size == size) |
| 1452 | return 0; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1453 | if (!size || (buffer_mode == DMX_BUFFER_MODE_EXTERNAL)) |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1454 | return -EINVAL; |
| 1455 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1456 | newmem = vmalloc_user(size); |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1457 | if (!newmem) |
| 1458 | return -ENOMEM; |
| 1459 | |
| 1460 | oldmem = buf->data; |
| 1461 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1462 | spin_lock_irq(lock); |
| 1463 | |
| 1464 | if (((f_flags & O_ACCMODE) != O_RDONLY) && |
| 1465 | (dmxdev->dvr_processing_input)) { |
| 1466 | spin_unlock_irq(lock); |
| 1467 | vfree(oldmem); |
| 1468 | return -EBUSY; |
| 1469 | } |
| 1470 | |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1471 | buf->data = newmem; |
| 1472 | buf->size = size; |
| 1473 | |
| 1474 | /* reset and not flush in case the buffer shrinks */ |
| 1475 | dvb_ringbuffer_reset(buf); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1476 | |
| 1477 | spin_unlock_irq(lock); |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1478 | |
| 1479 | vfree(oldmem); |
| 1480 | |
| 1481 | return 0; |
| 1482 | } |
| 1483 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1484 | static int dvb_dvr_set_buffer_mode(struct dmxdev *dmxdev, |
| 1485 | unsigned int f_flags, enum dmx_buffer_mode mode) |
| 1486 | { |
| 1487 | struct dvb_ringbuffer *buf; |
| 1488 | spinlock_t *lock; |
| 1489 | enum dmx_buffer_mode *buffer_mode; |
| 1490 | void **buff_handle; |
| 1491 | void *oldmem; |
| 1492 | int *is_protected; |
| 1493 | |
| 1494 | if ((mode != DMX_BUFFER_MODE_INTERNAL) && |
| 1495 | (mode != DMX_BUFFER_MODE_EXTERNAL)) |
| 1496 | return -EINVAL; |
| 1497 | |
| 1498 | if ((mode == DMX_BUFFER_MODE_EXTERNAL) && |
| 1499 | (!dmxdev->demux->map_buffer || !dmxdev->demux->unmap_buffer)) |
| 1500 | return -EINVAL; |
| 1501 | |
| 1502 | if ((f_flags & O_ACCMODE) == O_RDONLY) { |
| 1503 | buf = &dmxdev->dvr_buffer; |
| 1504 | lock = &dmxdev->lock; |
| 1505 | buffer_mode = &dmxdev->dvr_buffer_mode; |
| 1506 | buff_handle = &dmxdev->dvr_priv_buff_handle; |
| 1507 | is_protected = NULL; |
| 1508 | } else { |
| 1509 | buf = &dmxdev->dvr_input_buffer; |
| 1510 | lock = &dmxdev->dvr_in_lock; |
| 1511 | buffer_mode = &dmxdev->dvr_input_buffer_mode; |
| 1512 | buff_handle = &dmxdev->demux->dvr_input.priv_handle; |
| 1513 | is_protected = &dmxdev->demux->dvr_input_protected; |
| 1514 | } |
| 1515 | |
| 1516 | if (mode == *buffer_mode) |
| 1517 | return 0; |
| 1518 | |
| 1519 | oldmem = buf->data; |
| 1520 | spin_lock_irq(lock); |
| 1521 | buf->data = NULL; |
| 1522 | spin_unlock_irq(lock); |
| 1523 | |
| 1524 | *buffer_mode = mode; |
| 1525 | |
| 1526 | if (mode == DMX_BUFFER_MODE_INTERNAL) { |
| 1527 | /* switched from external to internal */ |
| 1528 | if (*buff_handle) { |
| 1529 | dmxdev->demux->unmap_buffer(dmxdev->demux, |
| 1530 | *buff_handle); |
| 1531 | *buff_handle = NULL; |
| 1532 | } |
| 1533 | |
| 1534 | if (is_protected) |
| 1535 | *is_protected = 0; |
| 1536 | |
| 1537 | /* set default internal buffer */ |
| 1538 | dvb_dvr_set_buffer_size(dmxdev, f_flags, DVR_BUFFER_SIZE); |
| 1539 | } else if (oldmem) { |
| 1540 | /* switched from internal to external */ |
| 1541 | vfree(oldmem); |
| 1542 | } |
| 1543 | |
| 1544 | return 0; |
| 1545 | } |
| 1546 | |
| 1547 | static int dvb_dvr_set_buffer(struct dmxdev *dmxdev, |
| 1548 | unsigned int f_flags, struct dmx_buffer *dmx_buffer) |
| 1549 | { |
| 1550 | struct dvb_ringbuffer *buf; |
| 1551 | spinlock_t *lock; |
| 1552 | enum dmx_buffer_mode buffer_mode; |
| 1553 | void **buff_handle; |
| 1554 | void *newmem; |
| 1555 | void *oldmem; |
| 1556 | int *is_protected; |
| 1557 | struct dmx_caps caps; |
| 1558 | |
| 1559 | if (dmxdev->demux->get_caps) |
| 1560 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 1561 | else |
| 1562 | caps.caps = 0; |
| 1563 | |
| 1564 | if ((f_flags & O_ACCMODE) == O_RDONLY) { |
| 1565 | buf = &dmxdev->dvr_buffer; |
| 1566 | lock = &dmxdev->lock; |
| 1567 | buffer_mode = dmxdev->dvr_buffer_mode; |
| 1568 | buff_handle = &dmxdev->dvr_priv_buff_handle; |
| 1569 | is_protected = NULL; |
| 1570 | } else { |
| 1571 | buf = &dmxdev->dvr_input_buffer; |
| 1572 | lock = &dmxdev->dvr_in_lock; |
| 1573 | buffer_mode = dmxdev->dvr_input_buffer_mode; |
| 1574 | buff_handle = &dmxdev->demux->dvr_input.priv_handle; |
| 1575 | is_protected = &dmxdev->demux->dvr_input_protected; |
| 1576 | if (!(caps.caps & DMX_CAP_SECURED_INPUT_PLAYBACK) && |
| 1577 | dmx_buffer->is_protected) |
| 1578 | return -EINVAL; |
| 1579 | } |
| 1580 | |
| 1581 | if (!dmx_buffer->size || |
| 1582 | (buffer_mode == DMX_BUFFER_MODE_INTERNAL)) |
| 1583 | return -EINVAL; |
| 1584 | |
| 1585 | oldmem = *buff_handle; |
| 1586 | |
| 1587 | /* |
| 1588 | * Protected buffer is relevant only for DVR input buffer |
| 1589 | * when DVR device is opened for write. In such case, |
| 1590 | * buffer is mapped only if the buffer is not protected one. |
| 1591 | */ |
| 1592 | if (!is_protected || !dmx_buffer->is_protected) { |
| 1593 | if (dmxdev->demux->map_buffer(dmxdev->demux, dmx_buffer, |
| 1594 | buff_handle, &newmem)) |
| 1595 | return -ENOMEM; |
| 1596 | } else { |
| 1597 | newmem = NULL; |
| 1598 | *buff_handle = NULL; |
| 1599 | } |
| 1600 | |
| 1601 | spin_lock_irq(lock); |
| 1602 | buf->data = newmem; |
| 1603 | buf->size = dmx_buffer->size; |
| 1604 | if (is_protected) |
| 1605 | *is_protected = dmx_buffer->is_protected; |
| 1606 | dvb_ringbuffer_reset(buf); |
| 1607 | spin_unlock_irq(lock); |
| 1608 | |
| 1609 | if (oldmem) |
| 1610 | dmxdev->demux->unmap_buffer(dmxdev->demux, oldmem); |
| 1611 | |
| 1612 | return 0; |
| 1613 | } |
| 1614 | |
| 1615 | static int dvb_dvr_get_event(struct dmxdev *dmxdev, |
| 1616 | unsigned int f_flags, |
| 1617 | struct dmx_filter_event *event) |
| 1618 | { |
| 1619 | int res = 0; |
| 1620 | |
| 1621 | if (!((f_flags & O_ACCMODE) == O_RDONLY)) |
| 1622 | return -EINVAL; |
| 1623 | |
| 1624 | spin_lock_irq(&dmxdev->lock); |
| 1625 | |
| 1626 | if (dmxdev->dvr_buffer.error == -EOVERFLOW) { |
| 1627 | event->type = DMX_EVENT_BUFFER_OVERFLOW; |
| 1628 | dmxdev->dvr_buffer.error = 0; |
| 1629 | } else { |
| 1630 | res = dvb_dmxdev_remove_event(&dmxdev->dvr_output_events, |
| 1631 | event); |
| 1632 | if (res) { |
| 1633 | spin_unlock_irq(&dmxdev->lock); |
| 1634 | return res; |
| 1635 | } |
| 1636 | } |
| 1637 | |
| 1638 | spin_unlock_irq(&dmxdev->lock); |
| 1639 | |
| 1640 | if (event->type == DMX_EVENT_BUFFER_OVERFLOW) |
| 1641 | dvb_dmxdev_auto_flush_buffer(dmxdev->dvr_feed, |
| 1642 | &dmxdev->dvr_buffer); |
| 1643 | |
| 1644 | /* |
| 1645 | * in PULL mode, we might be stalling on |
| 1646 | * event queue, so need to wake-up waiters |
| 1647 | */ |
| 1648 | if (dmxdev->playback_mode == DMX_PB_MODE_PULL) |
| 1649 | wake_up_all(&dmxdev->dvr_buffer.queue); |
| 1650 | |
| 1651 | return res; |
| 1652 | } |
| 1653 | |
| 1654 | static int dvb_dvr_get_buffer_status(struct dmxdev *dmxdev, |
| 1655 | unsigned int f_flags, |
| 1656 | struct dmx_buffer_status *dmx_buffer_status) |
| 1657 | { |
| 1658 | struct dvb_ringbuffer *buf; |
| 1659 | spinlock_t *lock; |
| 1660 | |
| 1661 | if ((f_flags & O_ACCMODE) == O_RDONLY) { |
| 1662 | buf = &dmxdev->dvr_buffer; |
| 1663 | lock = &dmxdev->lock; |
| 1664 | } else { |
| 1665 | buf = &dmxdev->dvr_input_buffer; |
| 1666 | lock = &dmxdev->dvr_in_lock; |
| 1667 | } |
| 1668 | |
| 1669 | spin_lock_irq(lock); |
| 1670 | |
| 1671 | dmx_buffer_status->error = buf->error; |
| 1672 | dmx_buffer_status->fullness = dvb_ringbuffer_avail(buf); |
| 1673 | dmx_buffer_status->free_bytes = dvb_ringbuffer_free(buf); |
| 1674 | dmx_buffer_status->read_offset = buf->pread; |
| 1675 | dmx_buffer_status->write_offset = buf->pwrite; |
| 1676 | dmx_buffer_status->size = buf->size; |
| 1677 | buf->error = 0; |
| 1678 | |
| 1679 | spin_unlock_irq(lock); |
| 1680 | |
| 1681 | if (dmx_buffer_status->error == -EOVERFLOW) |
| 1682 | dvb_dmxdev_auto_flush_buffer(dmxdev->dvr_feed, buf); |
| 1683 | |
| 1684 | return 0; |
| 1685 | } |
| 1686 | |
| 1687 | static int dvb_dvr_release_data(struct dmxdev *dmxdev, |
| 1688 | unsigned int f_flags, |
| 1689 | u32 bytes_count) |
| 1690 | { |
| 1691 | ssize_t buff_fullness; |
| 1692 | |
| 1693 | if (!((f_flags & O_ACCMODE) == O_RDONLY)) |
| 1694 | return -EINVAL; |
| 1695 | |
| 1696 | if (!bytes_count) |
| 1697 | return 0; |
| 1698 | |
| 1699 | buff_fullness = dvb_ringbuffer_avail(&dmxdev->dvr_buffer); |
| 1700 | |
| 1701 | if (bytes_count > buff_fullness) |
| 1702 | return -EINVAL; |
| 1703 | |
| 1704 | DVB_RINGBUFFER_SKIP(&dmxdev->dvr_buffer, bytes_count); |
| 1705 | |
| 1706 | dvb_dmxdev_notify_data_read(dmxdev->dvr_feed, bytes_count); |
| 1707 | spin_lock_irq(&dmxdev->lock); |
| 1708 | dvb_dmxdev_update_events(&dmxdev->dvr_output_events, bytes_count); |
| 1709 | spin_unlock_irq(&dmxdev->lock); |
| 1710 | |
| 1711 | wake_up_all(&dmxdev->dvr_buffer.queue); |
| 1712 | return 0; |
| 1713 | } |
| 1714 | |
| 1715 | /* |
| 1716 | * dvb_dvr_feed_data - Notify new data in DVR input buffer |
| 1717 | * |
| 1718 | * @dmxdev - demux device instance |
| 1719 | * @f_flags - demux device file flag (access mode) |
| 1720 | * @bytes_count - how many bytes were written to the input buffer |
| 1721 | * |
| 1722 | * Note: this function assume dmxdev->mutex was taken, so buffer cannot |
| 1723 | * be released during its operation. |
| 1724 | */ |
| 1725 | static int dvb_dvr_feed_data(struct dmxdev *dmxdev, |
| 1726 | unsigned int f_flags, |
| 1727 | u32 bytes_count) |
| 1728 | { |
| 1729 | ssize_t free_space; |
| 1730 | struct dvb_ringbuffer *buffer = &dmxdev->dvr_input_buffer; |
| 1731 | |
| 1732 | if ((f_flags & O_ACCMODE) == O_RDONLY) |
| 1733 | return -EINVAL; |
| 1734 | |
| 1735 | if (!bytes_count) |
| 1736 | return 0; |
| 1737 | |
| 1738 | free_space = dvb_ringbuffer_free(buffer); |
| 1739 | |
| 1740 | if (bytes_count > free_space) |
| 1741 | return -EINVAL; |
| 1742 | |
| 1743 | DVB_RINGBUFFER_PUSH(buffer, bytes_count); |
| 1744 | |
| 1745 | dvb_dvr_queue_data_feed(dmxdev, bytes_count); |
| 1746 | |
| 1747 | return 0; |
| 1748 | } |
| 1749 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 1750 | static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter |
| 1751 | *dmxdevfilter, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | { |
| 1753 | spin_lock_irq(&dmxdevfilter->dev->lock); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 1754 | dmxdevfilter->state = state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 1756 | } |
| 1757 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 1758 | static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter, |
| 1759 | unsigned long size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | { |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 1761 | struct dvb_ringbuffer *buf = &dmxdevfilter->buffer; |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1762 | void *newmem; |
| 1763 | void *oldmem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 1765 | if (buf->size == size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | return 0; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1767 | if (!size || |
| 1768 | (dmxdevfilter->buffer_mode == DMX_BUFFER_MODE_EXTERNAL)) |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1769 | return -EINVAL; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 1770 | if (dmxdevfilter->state >= DMXDEV_STATE_GO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | return -EBUSY; |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1772 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1773 | newmem = vmalloc_user(size); |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1774 | if (!newmem) |
| 1775 | return -ENOMEM; |
| 1776 | |
| 1777 | oldmem = buf->data; |
| 1778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | spin_lock_irq(&dmxdevfilter->dev->lock); |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1780 | buf->data = newmem; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 1781 | buf->size = size; |
Andrea Odetti | 48c01a9 | 2008-04-20 18:37:45 -0300 | [diff] [blame] | 1782 | |
| 1783 | /* reset and not flush in case the buffer shrinks */ |
| 1784 | dvb_ringbuffer_reset(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 1787 | vfree(oldmem); |
| 1788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | return 0; |
| 1790 | } |
| 1791 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 1792 | static int dvb_dmxdev_set_buffer_mode(struct dmxdev_filter *dmxdevfilter, |
| 1793 | enum dmx_buffer_mode mode) |
| 1794 | { |
| 1795 | struct dvb_ringbuffer *buf = &dmxdevfilter->buffer; |
| 1796 | struct dmxdev *dmxdev = dmxdevfilter->dev; |
| 1797 | void *oldmem; |
| 1798 | |
| 1799 | if (dmxdevfilter->state >= DMXDEV_STATE_GO) |
| 1800 | return -EBUSY; |
| 1801 | |
| 1802 | if ((mode != DMX_BUFFER_MODE_INTERNAL) && |
| 1803 | (mode != DMX_BUFFER_MODE_EXTERNAL)) |
| 1804 | return -EINVAL; |
| 1805 | |
| 1806 | if ((mode == DMX_BUFFER_MODE_EXTERNAL) && |
| 1807 | (!dmxdev->demux->map_buffer || !dmxdev->demux->unmap_buffer)) |
| 1808 | return -EINVAL; |
| 1809 | |
| 1810 | if (mode == dmxdevfilter->buffer_mode) |
| 1811 | return 0; |
| 1812 | |
| 1813 | oldmem = buf->data; |
| 1814 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 1815 | buf->data = NULL; |
| 1816 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 1817 | |
| 1818 | dmxdevfilter->buffer_mode = mode; |
| 1819 | |
| 1820 | if (mode == DMX_BUFFER_MODE_INTERNAL) { |
| 1821 | /* switched from external to internal */ |
| 1822 | if (dmxdevfilter->priv_buff_handle) { |
| 1823 | dmxdev->demux->unmap_buffer(dmxdev->demux, |
| 1824 | dmxdevfilter->priv_buff_handle); |
| 1825 | dmxdevfilter->priv_buff_handle = NULL; |
| 1826 | } |
| 1827 | } else if (oldmem) { |
| 1828 | /* switched from internal to external */ |
| 1829 | vfree(oldmem); |
| 1830 | } |
| 1831 | |
| 1832 | return 0; |
| 1833 | } |
| 1834 | |
| 1835 | static int dvb_dmxdev_set_buffer(struct dmxdev_filter *dmxdevfilter, |
| 1836 | struct dmx_buffer *buffer) |
| 1837 | { |
| 1838 | struct dvb_ringbuffer *buf = &dmxdevfilter->buffer; |
| 1839 | struct dmxdev *dmxdev = dmxdevfilter->dev; |
| 1840 | void *newmem; |
| 1841 | void *oldmem; |
| 1842 | |
| 1843 | if (dmxdevfilter->state >= DMXDEV_STATE_GO) |
| 1844 | return -EBUSY; |
| 1845 | |
| 1846 | if ((!buffer->size) || |
| 1847 | (dmxdevfilter->buffer_mode == DMX_BUFFER_MODE_INTERNAL)) |
| 1848 | return -EINVAL; |
| 1849 | |
| 1850 | oldmem = dmxdevfilter->priv_buff_handle; |
| 1851 | if (dmxdev->demux->map_buffer(dmxdev->demux, buffer, |
| 1852 | &dmxdevfilter->priv_buff_handle, &newmem)) |
| 1853 | return -ENOMEM; |
| 1854 | |
| 1855 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 1856 | buf->data = newmem; |
| 1857 | buf->size = buffer->size; |
| 1858 | dvb_ringbuffer_reset(buf); |
| 1859 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 1860 | |
| 1861 | if (oldmem) |
| 1862 | dmxdev->demux->unmap_buffer(dmxdev->demux, oldmem); |
| 1863 | |
| 1864 | return 0; |
| 1865 | } |
| 1866 | |
| 1867 | static int dvb_dmxdev_set_tsp_out_format(struct dmxdev_filter *dmxdevfilter, |
| 1868 | enum dmx_tsp_format_t dmx_tsp_format) |
| 1869 | { |
| 1870 | if (dmxdevfilter->state >= DMXDEV_STATE_GO) |
| 1871 | return -EBUSY; |
| 1872 | |
| 1873 | if ((dmx_tsp_format > DMX_TSP_FORMAT_192_HEAD) || |
| 1874 | (dmx_tsp_format < DMX_TSP_FORMAT_188)) |
| 1875 | return -EINVAL; |
| 1876 | |
| 1877 | dmxdevfilter->dmx_tsp_format = dmx_tsp_format; |
| 1878 | |
| 1879 | return 0; |
| 1880 | } |
| 1881 | |
| 1882 | static int dvb_dmxdev_set_decoder_buffer_size( |
| 1883 | struct dmxdev_filter *dmxdevfilter, |
| 1884 | unsigned long size) |
| 1885 | { |
| 1886 | struct dmx_caps caps; |
| 1887 | struct dmx_demux *demux = dmxdevfilter->dev->demux; |
| 1888 | |
| 1889 | if (demux->get_caps) { |
| 1890 | demux->get_caps(demux, &caps); |
| 1891 | if (!dvb_dmxdev_verify_buffer_size(size, caps.decoder.max_size, |
| 1892 | caps.decoder.size_alignment)) |
| 1893 | return -EINVAL; |
| 1894 | } |
| 1895 | |
| 1896 | if (size == 0) |
| 1897 | return -EINVAL; |
| 1898 | |
| 1899 | if (dmxdevfilter->decoder_buffers.buffers_size == size) |
| 1900 | return 0; |
| 1901 | |
| 1902 | if (dmxdevfilter->state >= DMXDEV_STATE_GO) |
| 1903 | return -EBUSY; |
| 1904 | |
| 1905 | /* |
| 1906 | * In case decoder buffers were already set before to some external |
| 1907 | * buffers, setting the decoder buffer size alone implies transition |
| 1908 | * to internal buffer mode. |
| 1909 | */ |
| 1910 | dmxdevfilter->decoder_buffers.buffers_size = size; |
| 1911 | dmxdevfilter->decoder_buffers.buffers_num = 0; |
| 1912 | dmxdevfilter->decoder_buffers.is_linear = 0; |
| 1913 | return 0; |
| 1914 | } |
| 1915 | |
| 1916 | static int dvb_dmxdev_set_source(struct dmxdev_filter *dmxdevfilter, |
| 1917 | dmx_source_t *source) |
| 1918 | { |
| 1919 | int ret = 0; |
| 1920 | struct dmxdev *dev; |
| 1921 | |
| 1922 | if (dmxdevfilter->state == DMXDEV_STATE_GO) |
| 1923 | return -EBUSY; |
| 1924 | |
| 1925 | dev = dmxdevfilter->dev; |
| 1926 | if (dev->demux->set_source) |
| 1927 | ret = dev->demux->set_source(dev->demux, source); |
| 1928 | |
| 1929 | if (!ret) |
| 1930 | dev->source = *source; |
| 1931 | |
| 1932 | return ret; |
| 1933 | } |
| 1934 | |
| 1935 | static int dvb_dmxdev_reuse_decoder_buf(struct dmxdev_filter *dmxdevfilter, |
| 1936 | int cookie) |
| 1937 | { |
| 1938 | struct dmxdev_feed *feed; |
| 1939 | |
| 1940 | if (dmxdevfilter->state != DMXDEV_STATE_GO || |
| 1941 | (dmxdevfilter->type != DMXDEV_TYPE_PES) || |
| 1942 | (dmxdevfilter->params.pes.output != DMX_OUT_DECODER) || |
| 1943 | (dmxdevfilter->events.event_mask.disable_mask & |
| 1944 | DMX_EVENT_NEW_ES_DATA)) |
| 1945 | return -EPERM; |
| 1946 | |
| 1947 | /* Only one feed should be in the list in case of decoder */ |
| 1948 | feed = list_first_entry(&dmxdevfilter->feed.ts, |
| 1949 | struct dmxdev_feed, next); |
| 1950 | if (feed && feed->ts && feed->ts->reuse_decoder_buffer) |
| 1951 | return feed->ts->reuse_decoder_buffer(feed->ts, cookie); |
| 1952 | |
| 1953 | return -ENODEV; |
| 1954 | } |
| 1955 | |
| 1956 | static int dvb_dmxdev_set_event_mask(struct dmxdev_filter *dmxdevfilter, |
| 1957 | struct dmx_events_mask *event_mask) |
| 1958 | { |
| 1959 | if (!event_mask || |
| 1960 | (event_mask->wakeup_threshold >= DMX_EVENT_QUEUE_SIZE)) |
| 1961 | return -EINVAL; |
| 1962 | |
| 1963 | if (dmxdevfilter->state == DMXDEV_STATE_GO) |
| 1964 | return -EBUSY; |
| 1965 | |
| 1966 | /* |
| 1967 | * Overflow event is not allowed to be masked. |
| 1968 | * This is because if overflow occurs, demux stops outputting data |
| 1969 | * until user is notified. If user is using events to read the data, |
| 1970 | * the overflow event must be always enabled or otherwise we would |
| 1971 | * never recover from overflow state. |
| 1972 | */ |
| 1973 | event_mask->disable_mask &= ~(u32)DMX_EVENT_BUFFER_OVERFLOW; |
| 1974 | event_mask->no_wakeup_mask &= ~(u32)DMX_EVENT_BUFFER_OVERFLOW; |
| 1975 | |
| 1976 | dmxdevfilter->events.event_mask = *event_mask; |
| 1977 | |
| 1978 | return 0; |
| 1979 | } |
| 1980 | |
| 1981 | static int dvb_dmxdev_get_event_mask(struct dmxdev_filter *dmxdevfilter, |
| 1982 | struct dmx_events_mask *event_mask) |
| 1983 | { |
| 1984 | if (!event_mask) |
| 1985 | return -EINVAL; |
| 1986 | |
| 1987 | *event_mask = dmxdevfilter->events.event_mask; |
| 1988 | |
| 1989 | return 0; |
| 1990 | } |
| 1991 | |
| 1992 | static int dvb_dmxdev_set_indexing_params(struct dmxdev_filter *dmxdevfilter, |
| 1993 | struct dmx_indexing_params *idx_params) |
| 1994 | { |
| 1995 | int found_pid; |
| 1996 | struct dmxdev_feed *feed; |
| 1997 | struct dmxdev_feed *ts_feed = NULL; |
| 1998 | struct dmx_caps caps; |
| 1999 | int ret = 0; |
| 2000 | |
| 2001 | if (!dmxdevfilter->dev->demux->get_caps) |
| 2002 | return -EINVAL; |
| 2003 | |
| 2004 | dmxdevfilter->dev->demux->get_caps(dmxdevfilter->dev->demux, &caps); |
| 2005 | |
| 2006 | if (!idx_params || |
| 2007 | !(caps.caps & DMX_CAP_VIDEO_INDEXING) || |
| 2008 | (dmxdevfilter->state < DMXDEV_STATE_SET) || |
| 2009 | (dmxdevfilter->type != DMXDEV_TYPE_PES) || |
| 2010 | ((dmxdevfilter->params.pes.output != DMX_OUT_TS_TAP) && |
| 2011 | (dmxdevfilter->params.pes.output != DMX_OUT_TSDEMUX_TAP))) |
| 2012 | return -EINVAL; |
| 2013 | |
| 2014 | if (idx_params->enable && !idx_params->types) |
| 2015 | return -EINVAL; |
| 2016 | |
| 2017 | found_pid = 0; |
| 2018 | list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) { |
| 2019 | if (feed->pid == idx_params->pid) { |
| 2020 | found_pid = 1; |
| 2021 | ts_feed = feed; |
| 2022 | ts_feed->idx_params = *idx_params; |
| 2023 | if ((dmxdevfilter->state == DMXDEV_STATE_GO) && |
| 2024 | ts_feed->ts->set_idx_params) |
| 2025 | ret = ts_feed->ts->set_idx_params( |
| 2026 | ts_feed->ts, idx_params); |
| 2027 | break; |
| 2028 | } |
| 2029 | } |
| 2030 | |
| 2031 | if (!found_pid) |
| 2032 | return -EINVAL; |
| 2033 | |
| 2034 | return ret; |
| 2035 | } |
| 2036 | |
| 2037 | static int dvb_dmxdev_get_scrambling_bits(struct dmxdev_filter *filter, |
| 2038 | struct dmx_scrambling_bits *scrambling_bits) |
| 2039 | { |
| 2040 | struct dmxdev_feed *feed; |
| 2041 | |
| 2042 | if (!scrambling_bits || |
| 2043 | (filter->state != DMXDEV_STATE_GO)) |
| 2044 | return -EINVAL; |
| 2045 | |
| 2046 | if (filter->type == DMXDEV_TYPE_SEC) { |
| 2047 | if (filter->feed.sec.feed->get_scrambling_bits) |
| 2048 | return filter->feed.sec.feed->get_scrambling_bits( |
| 2049 | filter->feed.sec.feed, |
| 2050 | &scrambling_bits->value); |
| 2051 | return -EINVAL; |
| 2052 | } |
| 2053 | |
| 2054 | list_for_each_entry(feed, &filter->feed.ts, next) { |
| 2055 | if (feed->pid == scrambling_bits->pid) { |
| 2056 | if (feed->ts->get_scrambling_bits) |
| 2057 | return feed->ts->get_scrambling_bits(feed->ts, |
| 2058 | &scrambling_bits->value); |
| 2059 | return -EINVAL; |
| 2060 | } |
| 2061 | } |
| 2062 | |
| 2063 | return -EINVAL; |
| 2064 | } |
| 2065 | |
| 2066 | static void dvb_dmxdev_ts_insertion_work(struct work_struct *worker) |
| 2067 | { |
| 2068 | struct ts_insertion_buffer *ts_buffer = |
| 2069 | container_of(to_delayed_work(worker), |
| 2070 | struct ts_insertion_buffer, dwork); |
| 2071 | struct dmxdev_feed *feed; |
| 2072 | size_t free_bytes; |
| 2073 | struct dmx_ts_feed *ts; |
| 2074 | |
| 2075 | mutex_lock(&ts_buffer->dmxdevfilter->mutex); |
| 2076 | |
| 2077 | if (ts_buffer->abort || |
| 2078 | (ts_buffer->dmxdevfilter->state != DMXDEV_STATE_GO)) { |
| 2079 | mutex_unlock(&ts_buffer->dmxdevfilter->mutex); |
| 2080 | return; |
| 2081 | } |
| 2082 | |
| 2083 | feed = list_first_entry(&ts_buffer->dmxdevfilter->feed.ts, |
| 2084 | struct dmxdev_feed, next); |
| 2085 | ts = feed->ts; |
| 2086 | free_bytes = dvb_ringbuffer_free(&ts_buffer->dmxdevfilter->buffer); |
| 2087 | |
| 2088 | mutex_unlock(&ts_buffer->dmxdevfilter->mutex); |
| 2089 | |
| 2090 | if (ts_buffer->size < free_bytes) |
| 2091 | ts->ts_insertion_insert_buffer(ts, |
| 2092 | ts_buffer->buffer, ts_buffer->size); |
| 2093 | |
| 2094 | if (ts_buffer->repetition_time && !ts_buffer->abort) |
| 2095 | schedule_delayed_work(&ts_buffer->dwork, |
| 2096 | msecs_to_jiffies(ts_buffer->repetition_time)); |
| 2097 | } |
| 2098 | |
| 2099 | static void dvb_dmxdev_queue_ts_insertion( |
| 2100 | struct ts_insertion_buffer *ts_buffer) |
| 2101 | { |
| 2102 | size_t tsp_size; |
| 2103 | |
| 2104 | if (ts_buffer->dmxdevfilter->dmx_tsp_format == DMX_TSP_FORMAT_188) |
| 2105 | tsp_size = 188; |
| 2106 | else |
| 2107 | tsp_size = 192; |
| 2108 | |
| 2109 | if (ts_buffer->size % tsp_size) { |
| 2110 | pr_err("%s: Wrong buffer alignment, size=%zu, tsp_size=%zu\n", |
| 2111 | __func__, ts_buffer->size, tsp_size); |
| 2112 | return; |
| 2113 | } |
| 2114 | |
| 2115 | ts_buffer->abort = 0; |
| 2116 | schedule_delayed_work(&ts_buffer->dwork, 0); |
| 2117 | } |
| 2118 | |
| 2119 | static void dvb_dmxdev_cancel_ts_insertion( |
| 2120 | struct ts_insertion_buffer *ts_buffer) |
| 2121 | { |
| 2122 | /* |
| 2123 | * This function assumes it is called while mutex |
| 2124 | * of demux filter is taken. Since work in workqueue |
| 2125 | * captures the filter's mutex to protect against the DB, |
| 2126 | * mutex needs to be released before waiting for the work |
| 2127 | * to get finished otherwise work in workqueue will |
| 2128 | * never be finished. |
| 2129 | */ |
| 2130 | if (!mutex_is_locked(&ts_buffer->dmxdevfilter->mutex)) { |
| 2131 | pr_err("%s: mutex is not locked!\n", __func__); |
| 2132 | return; |
| 2133 | } |
| 2134 | |
| 2135 | ts_buffer->abort = 1; |
| 2136 | |
| 2137 | mutex_unlock(&ts_buffer->dmxdevfilter->mutex); |
| 2138 | cancel_delayed_work_sync(&ts_buffer->dwork); |
| 2139 | mutex_lock(&ts_buffer->dmxdevfilter->mutex); |
| 2140 | } |
| 2141 | |
| 2142 | static int dvb_dmxdev_set_ts_insertion(struct dmxdev_filter *dmxdevfilter, |
| 2143 | struct dmx_set_ts_insertion *params) |
| 2144 | { |
| 2145 | int ret = 0; |
| 2146 | int first_buffer; |
| 2147 | struct dmxdev_feed *feed; |
| 2148 | struct ts_insertion_buffer *ts_buffer; |
| 2149 | struct dmx_caps caps; |
| 2150 | |
| 2151 | if (!dmxdevfilter->dev->demux->get_caps) |
| 2152 | return -EINVAL; |
| 2153 | |
| 2154 | dmxdevfilter->dev->demux->get_caps(dmxdevfilter->dev->demux, &caps); |
| 2155 | |
| 2156 | if (!params || |
| 2157 | !params->size || |
| 2158 | !(caps.caps & DMX_CAP_TS_INSERTION) || |
| 2159 | (dmxdevfilter->state < DMXDEV_STATE_SET) || |
| 2160 | (dmxdevfilter->type != DMXDEV_TYPE_PES) || |
| 2161 | ((dmxdevfilter->params.pes.output != DMX_OUT_TS_TAP) && |
| 2162 | (dmxdevfilter->params.pes.output != DMX_OUT_TSDEMUX_TAP))) |
| 2163 | return -EINVAL; |
| 2164 | |
| 2165 | ts_buffer = vmalloc(sizeof(struct ts_insertion_buffer)); |
| 2166 | if (!ts_buffer) |
| 2167 | return -ENOMEM; |
| 2168 | |
| 2169 | ts_buffer->buffer = vmalloc(params->size); |
| 2170 | if (!ts_buffer->buffer) { |
| 2171 | vfree(ts_buffer); |
| 2172 | return -ENOMEM; |
| 2173 | } |
| 2174 | |
| 2175 | if (copy_from_user(ts_buffer->buffer, |
| 2176 | params->ts_packets, params->size)) { |
| 2177 | vfree(ts_buffer->buffer); |
| 2178 | vfree(ts_buffer); |
| 2179 | return -EFAULT; |
| 2180 | } |
| 2181 | |
| 2182 | if (params->repetition_time && |
| 2183 | params->repetition_time < DMX_MIN_INSERTION_REPETITION_TIME) |
| 2184 | params->repetition_time = DMX_MIN_INSERTION_REPETITION_TIME; |
| 2185 | |
| 2186 | ts_buffer->size = params->size; |
| 2187 | ts_buffer->identifier = params->identifier; |
| 2188 | ts_buffer->repetition_time = params->repetition_time; |
| 2189 | ts_buffer->dmxdevfilter = dmxdevfilter; |
| 2190 | INIT_DELAYED_WORK(&ts_buffer->dwork, dvb_dmxdev_ts_insertion_work); |
| 2191 | |
| 2192 | first_buffer = list_empty(&dmxdevfilter->insertion_buffers); |
| 2193 | list_add_tail(&ts_buffer->next, &dmxdevfilter->insertion_buffers); |
| 2194 | |
| 2195 | if (dmxdevfilter->state != DMXDEV_STATE_GO) |
| 2196 | return 0; |
| 2197 | |
| 2198 | feed = list_first_entry(&dmxdevfilter->feed.ts, |
| 2199 | struct dmxdev_feed, next); |
| 2200 | |
| 2201 | if (first_buffer && feed->ts->ts_insertion_init) |
| 2202 | ret = feed->ts->ts_insertion_init(feed->ts); |
| 2203 | |
| 2204 | if (!ret) { |
| 2205 | dvb_dmxdev_queue_ts_insertion(ts_buffer); |
| 2206 | } else { |
| 2207 | list_del(&ts_buffer->next); |
| 2208 | vfree(ts_buffer->buffer); |
| 2209 | vfree(ts_buffer); |
| 2210 | } |
| 2211 | |
| 2212 | return ret; |
| 2213 | } |
| 2214 | |
| 2215 | static int dvb_dmxdev_abort_ts_insertion(struct dmxdev_filter *dmxdevfilter, |
| 2216 | struct dmx_abort_ts_insertion *params) |
| 2217 | { |
| 2218 | int ret = 0; |
| 2219 | int found_buffer; |
| 2220 | struct dmxdev_feed *feed; |
| 2221 | struct ts_insertion_buffer *ts_buffer, *tmp; |
| 2222 | struct dmx_caps caps; |
| 2223 | |
| 2224 | if (!dmxdevfilter->dev->demux->get_caps) |
| 2225 | return -EINVAL; |
| 2226 | |
| 2227 | dmxdevfilter->dev->demux->get_caps(dmxdevfilter->dev->demux, &caps); |
| 2228 | |
| 2229 | if (!params || |
| 2230 | !(caps.caps & DMX_CAP_TS_INSERTION) || |
| 2231 | (dmxdevfilter->state < DMXDEV_STATE_SET) || |
| 2232 | (dmxdevfilter->type != DMXDEV_TYPE_PES) || |
| 2233 | ((dmxdevfilter->params.pes.output != DMX_OUT_TS_TAP) && |
| 2234 | (dmxdevfilter->params.pes.output != DMX_OUT_TSDEMUX_TAP))) |
| 2235 | return -EINVAL; |
| 2236 | |
| 2237 | found_buffer = 0; |
| 2238 | list_for_each_entry_safe(ts_buffer, tmp, |
| 2239 | &dmxdevfilter->insertion_buffers, next) { |
| 2240 | if (ts_buffer->identifier == params->identifier) { |
| 2241 | list_del(&ts_buffer->next); |
| 2242 | found_buffer = 1; |
| 2243 | break; |
| 2244 | } |
| 2245 | } |
| 2246 | |
| 2247 | if (!found_buffer) |
| 2248 | return -EINVAL; |
| 2249 | |
| 2250 | if (dmxdevfilter->state == DMXDEV_STATE_GO) { |
| 2251 | dvb_dmxdev_cancel_ts_insertion(ts_buffer); |
| 2252 | if (list_empty(&dmxdevfilter->insertion_buffers)) { |
| 2253 | feed = list_first_entry(&dmxdevfilter->feed.ts, |
| 2254 | struct dmxdev_feed, next); |
| 2255 | if (feed->ts->ts_insertion_terminate) |
| 2256 | ret = feed->ts->ts_insertion_terminate( |
| 2257 | feed->ts); |
| 2258 | } |
| 2259 | } |
| 2260 | |
| 2261 | vfree(ts_buffer->buffer); |
| 2262 | vfree(ts_buffer); |
| 2263 | |
| 2264 | return ret; |
| 2265 | } |
| 2266 | |
| 2267 | static int dvb_dmxdev_ts_fullness_callback(struct dmx_ts_feed *filter, |
| 2268 | int required_space, int wait) |
| 2269 | { |
| 2270 | struct dmxdev_filter *dmxdevfilter = filter->priv; |
| 2271 | struct dvb_ringbuffer *src; |
| 2272 | struct dmxdev_events_queue *events; |
| 2273 | int ret; |
| 2274 | |
| 2275 | if (!dmxdevfilter) { |
| 2276 | pr_err("%s: NULL demux filter object!\n", __func__); |
| 2277 | return -ENODEV; |
| 2278 | } |
| 2279 | |
| 2280 | if (dmxdevfilter->params.pes.output != DMX_OUT_TS_TAP) { |
| 2281 | src = &dmxdevfilter->buffer; |
| 2282 | events = &dmxdevfilter->events; |
| 2283 | } else { |
| 2284 | src = &dmxdevfilter->dev->dvr_buffer; |
| 2285 | events = &dmxdevfilter->dev->dvr_output_events; |
| 2286 | } |
| 2287 | |
| 2288 | do { |
| 2289 | ret = 0; |
| 2290 | |
| 2291 | if (dmxdevfilter->dev->dvr_in_exit) |
| 2292 | return -ENODEV; |
| 2293 | |
| 2294 | spin_lock(&dmxdevfilter->dev->lock); |
| 2295 | |
| 2296 | if ((!src->data) || |
| 2297 | (dmxdevfilter->state != DMXDEV_STATE_GO)) |
| 2298 | ret = -EINVAL; |
| 2299 | else if (src->error) |
| 2300 | ret = src->error; |
| 2301 | |
| 2302 | if (ret) { |
| 2303 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2304 | return ret; |
| 2305 | } |
| 2306 | |
| 2307 | if ((required_space <= dvb_ringbuffer_free(src)) && |
| 2308 | (!dvb_dmxdev_events_is_full(events))) { |
| 2309 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2310 | return 0; |
| 2311 | } |
| 2312 | |
| 2313 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2314 | |
| 2315 | if (!wait) |
| 2316 | return -ENOSPC; |
| 2317 | |
| 2318 | ret = wait_event_interruptible(src->queue, |
| 2319 | (!src->data) || |
| 2320 | ((dvb_ringbuffer_free(src) >= required_space) && |
| 2321 | (!dvb_dmxdev_events_is_full(events))) || |
| 2322 | (src->error != 0) || |
| 2323 | (dmxdevfilter->state != DMXDEV_STATE_GO) || |
| 2324 | dmxdevfilter->dev->dvr_in_exit); |
| 2325 | |
| 2326 | if (ret < 0) |
| 2327 | return ret; |
| 2328 | } while (1); |
| 2329 | } |
| 2330 | |
| 2331 | static int dvb_dmxdev_sec_fullness_callback( |
| 2332 | struct dmx_section_filter *filter, |
| 2333 | int required_space, int wait) |
| 2334 | { |
| 2335 | struct dmxdev_filter *dmxdevfilter = filter->priv; |
| 2336 | struct dvb_ringbuffer *src; |
| 2337 | struct dmxdev_events_queue *events; |
| 2338 | int ret; |
| 2339 | |
| 2340 | if (!dmxdevfilter) { |
| 2341 | pr_err("%s: NULL demux filter object!\n", __func__); |
| 2342 | return -ENODEV; |
| 2343 | } |
| 2344 | |
| 2345 | src = &dmxdevfilter->buffer; |
| 2346 | events = &dmxdevfilter->events; |
| 2347 | |
| 2348 | do { |
| 2349 | ret = 0; |
| 2350 | |
| 2351 | if (dmxdevfilter->dev->dvr_in_exit) |
| 2352 | return -ENODEV; |
| 2353 | |
| 2354 | spin_lock(&dmxdevfilter->dev->lock); |
| 2355 | |
| 2356 | if ((!src->data) || |
| 2357 | (dmxdevfilter->state != DMXDEV_STATE_GO)) |
| 2358 | ret = -EINVAL; |
| 2359 | else if (src->error) |
| 2360 | ret = src->error; |
| 2361 | |
| 2362 | if (ret) { |
| 2363 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2364 | return ret; |
| 2365 | } |
| 2366 | |
| 2367 | if ((required_space <= dvb_ringbuffer_free(src)) && |
| 2368 | (!dvb_dmxdev_events_is_full(events))) { |
| 2369 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2370 | return 0; |
| 2371 | } |
| 2372 | |
| 2373 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2374 | |
| 2375 | if (!wait) |
| 2376 | return -ENOSPC; |
| 2377 | |
| 2378 | ret = wait_event_interruptible(src->queue, |
| 2379 | (!src->data) || |
| 2380 | ((dvb_ringbuffer_free(src) >= required_space) && |
| 2381 | (!dvb_dmxdev_events_is_full(events))) || |
| 2382 | (src->error != 0) || |
| 2383 | (dmxdevfilter->state != DMXDEV_STATE_GO) || |
| 2384 | dmxdevfilter->dev->dvr_in_exit); |
| 2385 | |
| 2386 | if (ret < 0) |
| 2387 | return ret; |
| 2388 | } while (1); |
| 2389 | } |
| 2390 | |
| 2391 | static int dvb_dmxdev_set_playback_mode(struct dmxdev_filter *dmxdevfilter, |
| 2392 | enum dmx_playback_mode_t playback_mode) |
| 2393 | { |
| 2394 | struct dmxdev *dmxdev = dmxdevfilter->dev; |
| 2395 | struct dmx_caps caps; |
| 2396 | |
| 2397 | if (dmxdev->demux->get_caps) |
| 2398 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 2399 | else |
| 2400 | caps.caps = 0; |
| 2401 | |
| 2402 | if ((playback_mode != DMX_PB_MODE_PUSH) && |
| 2403 | (playback_mode != DMX_PB_MODE_PULL)) |
| 2404 | return -EINVAL; |
| 2405 | |
| 2406 | if (dmxdev->demux->set_playback_mode == NULL) |
| 2407 | return -EINVAL; |
| 2408 | |
| 2409 | if (((dmxdev->source < DMX_SOURCE_DVR0) || |
| 2410 | !(caps.caps & DMX_CAP_PULL_MODE)) && |
| 2411 | (playback_mode == DMX_PB_MODE_PULL)) |
| 2412 | return -EPERM; |
| 2413 | |
| 2414 | if (dmxdevfilter->state == DMXDEV_STATE_GO) |
| 2415 | return -EBUSY; |
| 2416 | |
| 2417 | dmxdev->playback_mode = playback_mode; |
| 2418 | |
| 2419 | return dmxdev->demux->set_playback_mode( |
| 2420 | dmxdev->demux, |
| 2421 | dmxdev->playback_mode, |
| 2422 | dvb_dmxdev_ts_fullness_callback, |
| 2423 | dvb_dmxdev_sec_fullness_callback); |
| 2424 | } |
| 2425 | |
| 2426 | static int dvb_dmxdev_flush_buffer(struct dmxdev_filter *filter) |
| 2427 | { |
| 2428 | size_t flush_len; |
| 2429 | int ret; |
| 2430 | |
| 2431 | if (filter->state != DMXDEV_STATE_GO) |
| 2432 | return -EINVAL; |
| 2433 | |
| 2434 | flush_len = dvb_ringbuffer_avail(&filter->buffer); |
| 2435 | ret = dvb_dmxdev_flush_data(filter, flush_len); |
| 2436 | |
| 2437 | return ret; |
| 2438 | } |
| 2439 | |
| 2440 | static int dvb_dmxdev_get_buffer_status( |
| 2441 | struct dmxdev_filter *dmxdevfilter, |
| 2442 | struct dmx_buffer_status *dmx_buffer_status) |
| 2443 | { |
| 2444 | struct dvb_ringbuffer *buf = &dmxdevfilter->buffer; |
| 2445 | |
| 2446 | /* |
| 2447 | * Note: Taking the dmxdevfilter->dev->lock spinlock is required only |
| 2448 | * when getting the status of the Demux-userspace data ringbuffer . |
| 2449 | * In case we are getting the status of a decoder buffer, taking this |
| 2450 | * spinlock is not required and in fact might lead to a deadlock. |
| 2451 | */ |
| 2452 | if ((dmxdevfilter->type == DMXDEV_TYPE_PES) && |
| 2453 | (dmxdevfilter->params.pes.output == DMX_OUT_DECODER)) { |
| 2454 | struct dmxdev_feed *feed; |
| 2455 | int ret; |
| 2456 | |
| 2457 | /* Only one feed should be in the list in case of decoder */ |
| 2458 | feed = list_first_entry(&dmxdevfilter->feed.ts, |
| 2459 | struct dmxdev_feed, next); |
| 2460 | |
| 2461 | /* Ask for status of decoder's buffer from underlying HW */ |
| 2462 | if (feed->ts->get_decoder_buff_status) |
| 2463 | ret = feed->ts->get_decoder_buff_status( |
| 2464 | feed->ts, |
| 2465 | dmx_buffer_status); |
| 2466 | else |
| 2467 | ret = -ENODEV; |
| 2468 | |
| 2469 | return ret; |
| 2470 | } |
| 2471 | |
| 2472 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 2473 | |
| 2474 | if (!buf->data) { |
| 2475 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 2476 | return -EINVAL; |
| 2477 | } |
| 2478 | |
| 2479 | dmx_buffer_status->error = buf->error; |
| 2480 | dmx_buffer_status->fullness = dvb_ringbuffer_avail(buf); |
| 2481 | dmx_buffer_status->free_bytes = dvb_ringbuffer_free(buf); |
| 2482 | dmx_buffer_status->read_offset = buf->pread; |
| 2483 | dmx_buffer_status->write_offset = buf->pwrite; |
| 2484 | dmx_buffer_status->size = buf->size; |
| 2485 | buf->error = 0; |
| 2486 | |
| 2487 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 2488 | |
| 2489 | if (dmx_buffer_status->error == -EOVERFLOW) |
| 2490 | dvb_dmxdev_auto_flush_buffer(dmxdevfilter, buf); |
| 2491 | |
| 2492 | return 0; |
| 2493 | } |
| 2494 | |
| 2495 | static int dvb_dmxdev_release_data(struct dmxdev_filter *dmxdevfilter, |
| 2496 | u32 bytes_count) |
| 2497 | { |
| 2498 | ssize_t buff_fullness; |
| 2499 | |
| 2500 | if (!dmxdevfilter->buffer.data) |
| 2501 | return -EINVAL; |
| 2502 | |
| 2503 | if (!bytes_count) |
| 2504 | return 0; |
| 2505 | |
| 2506 | buff_fullness = dvb_ringbuffer_avail(&dmxdevfilter->buffer); |
| 2507 | |
| 2508 | if (bytes_count > buff_fullness) |
| 2509 | return -EINVAL; |
| 2510 | |
| 2511 | DVB_RINGBUFFER_SKIP(&dmxdevfilter->buffer, bytes_count); |
| 2512 | |
| 2513 | dvb_dmxdev_notify_data_read(dmxdevfilter, bytes_count); |
| 2514 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 2515 | dvb_dmxdev_update_events(&dmxdevfilter->events, bytes_count); |
| 2516 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 2517 | |
| 2518 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2519 | |
| 2520 | return 0; |
| 2521 | } |
| 2522 | |
| 2523 | static int dvb_dmxdev_get_event(struct dmxdev_filter *dmxdevfilter, |
| 2524 | struct dmx_filter_event *event) |
| 2525 | { |
| 2526 | int res = 0; |
| 2527 | |
| 2528 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 2529 | |
| 2530 | /* Check first for filter overflow */ |
| 2531 | if (dmxdevfilter->buffer.error == -EOVERFLOW) { |
| 2532 | event->type = DMX_EVENT_BUFFER_OVERFLOW; |
| 2533 | } else { |
| 2534 | res = dvb_dmxdev_remove_event(&dmxdevfilter->events, event); |
| 2535 | if (res) { |
| 2536 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 2537 | return res; |
| 2538 | } |
| 2539 | } |
| 2540 | |
| 2541 | /* clear buffer error now that user was notified */ |
| 2542 | if (event->type == DMX_EVENT_BUFFER_OVERFLOW || |
| 2543 | event->type == DMX_EVENT_SECTION_TIMEOUT) |
| 2544 | dmxdevfilter->buffer.error = 0; |
| 2545 | |
| 2546 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 2547 | |
| 2548 | if (event->type == DMX_EVENT_BUFFER_OVERFLOW) |
| 2549 | dvb_dmxdev_auto_flush_buffer(dmxdevfilter, |
| 2550 | &dmxdevfilter->buffer); |
| 2551 | |
| 2552 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 2553 | |
| 2554 | /* |
| 2555 | * If no-data events are enabled on this filter, |
| 2556 | * the events can be removed from the queue when |
| 2557 | * user gets them. |
| 2558 | * For filters with data events enabled, the event is removed |
| 2559 | * from the queue only when the respective data is read. |
| 2560 | */ |
| 2561 | if (event->type != DMX_EVENT_BUFFER_OVERFLOW && |
| 2562 | dmxdevfilter->events.data_read_event_masked) |
| 2563 | dmxdevfilter->events.read_index = |
| 2564 | dvb_dmxdev_advance_event_idx( |
| 2565 | dmxdevfilter->events.read_index); |
| 2566 | |
| 2567 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 2568 | |
| 2569 | /* |
| 2570 | * in PULL mode, we might be stalling on |
| 2571 | * event queue, so need to wake-up waiters |
| 2572 | */ |
| 2573 | if (dmxdevfilter->dev->playback_mode == DMX_PB_MODE_PULL) |
| 2574 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2575 | |
| 2576 | return res; |
| 2577 | } |
| 2578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | static void dvb_dmxdev_filter_timeout(unsigned long data) |
| 2580 | { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2581 | struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2582 | struct dmx_filter_event event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2584 | dmxdevfilter->buffer.error = -ETIMEDOUT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2585 | spin_lock_irq(&dmxdevfilter->dev->lock); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2586 | dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2587 | event.type = DMX_EVENT_SECTION_TIMEOUT; |
| 2588 | dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2590 | wake_up_all(&dmxdevfilter->buffer.queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | } |
| 2592 | |
| 2593 | static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter) |
| 2594 | { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2595 | struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | |
| 2597 | del_timer(&dmxdevfilter->timer); |
| 2598 | if (para->timeout) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2599 | dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout; |
| 2600 | dmxdevfilter->timer.data = (unsigned long)dmxdevfilter; |
| 2601 | dmxdevfilter->timer.expires = |
| 2602 | jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2603 | add_timer(&dmxdevfilter->timer); |
| 2604 | } |
| 2605 | } |
| 2606 | |
| 2607 | static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2608 | const u8 *buffer2, size_t buffer2_len, |
Mauro Carvalho Chehab | 2f684b2 | 2015-10-06 19:53:02 -0300 | [diff] [blame] | 2609 | struct dmx_section_filter *filter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 2611 | struct dmxdev_filter *dmxdevfilter = filter->priv; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2612 | struct dmx_filter_event event; |
| 2613 | ssize_t free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2614 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2615 | |
| 2616 | if (!dmxdevfilter) { |
| 2617 | pr_err("%s: null filter.\n", __func__); |
| 2618 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2620 | |
Mauro Carvalho Chehab | 2810016 | 2009-02-16 15:27:44 -0300 | [diff] [blame] | 2621 | spin_lock(&dmxdevfilter->dev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2622 | |
| 2623 | if (dmxdevfilter->buffer.error || |
| 2624 | dmxdevfilter->state != DMXDEV_STATE_GO || |
| 2625 | dmxdevfilter->eos_state) { |
Mauro Carvalho Chehab | 2810016 | 2009-02-16 15:27:44 -0300 | [diff] [blame] | 2626 | spin_unlock(&dmxdevfilter->dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | return 0; |
| 2628 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2629 | |
| 2630 | /* Discard section data if event cannot be notified */ |
| 2631 | if (!(dmxdevfilter->events.event_mask.disable_mask & |
| 2632 | DMX_EVENT_NEW_SECTION) && |
| 2633 | dvb_dmxdev_events_is_full(&dmxdevfilter->events)) { |
| 2634 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2635 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2637 | |
| 2638 | if ((buffer1_len + buffer2_len) == 0) { |
| 2639 | if (buffer1 == NULL && buffer2 == NULL) { |
| 2640 | /* Section was dropped due to CRC error */ |
| 2641 | event.type = DMX_EVENT_SECTION_CRC_ERROR; |
| 2642 | dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
| 2643 | |
| 2644 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2645 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2646 | } else { |
| 2647 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2648 | } |
| 2649 | |
| 2650 | return 0; |
| 2651 | } |
| 2652 | |
| 2653 | event.params.section.base_offset = dmxdevfilter->buffer.pwrite; |
| 2654 | event.params.section.start_offset = dmxdevfilter->buffer.pwrite; |
| 2655 | |
| 2656 | del_timer(&dmxdevfilter->timer); |
| 2657 | |
| 2658 | /* Verify output buffer has sufficient space, or report overflow */ |
| 2659 | free = dvb_ringbuffer_free(&dmxdevfilter->buffer); |
| 2660 | if (free < (buffer1_len + buffer2_len)) { |
| 2661 | pr_debug("%s: section filter overflow (pid=%u)\n", |
| 2662 | __func__, dmxdevfilter->params.sec.pid); |
| 2663 | dmxdevfilter->buffer.error = -EOVERFLOW; |
| 2664 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2665 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2666 | return 0; |
| 2667 | } |
| 2668 | |
| 2669 | dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1, buffer1_len); |
| 2670 | dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2, buffer2_len); |
| 2671 | |
| 2672 | event.type = DMX_EVENT_NEW_SECTION; |
| 2673 | event.params.section.total_length = buffer1_len + buffer2_len; |
| 2674 | event.params.section.actual_length = |
| 2675 | event.params.section.total_length; |
| 2676 | |
| 2677 | dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
| 2678 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2679 | if (dmxdevfilter->params.sec.flags & DMX_ONESHOT) |
| 2680 | dmxdevfilter->state = DMXDEV_STATE_DONE; |
Mauro Carvalho Chehab | 2810016 | 2009-02-16 15:27:44 -0300 | [diff] [blame] | 2681 | spin_unlock(&dmxdevfilter->dev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2682 | wake_up_all(&dmxdevfilter->buffer.queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | return 0; |
| 2684 | } |
| 2685 | |
| 2686 | static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2687 | const u8 *buffer2, size_t buffer2_len, |
Mauro Carvalho Chehab | 2f684b2 | 2015-10-06 19:53:02 -0300 | [diff] [blame] | 2688 | struct dmx_ts_feed *feed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 2690 | struct dmxdev_filter *dmxdevfilter = feed->priv; |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 2691 | struct dvb_ringbuffer *buffer; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2692 | struct dmxdev_events_queue *events; |
| 2693 | struct dmx_filter_event event; |
| 2694 | ssize_t free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2695 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2696 | if (!dmxdevfilter) { |
| 2697 | pr_err("%s: null filter (feed->is_filtering=%d)\n", |
| 2698 | __func__, feed->is_filtering); |
| 2699 | return -EINVAL; |
| 2700 | } |
Mauro Carvalho Chehab | 2810016 | 2009-02-16 15:27:44 -0300 | [diff] [blame] | 2701 | spin_lock(&dmxdevfilter->dev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2702 | |
| 2703 | if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER || |
| 2704 | dmxdevfilter->state != DMXDEV_STATE_GO || |
| 2705 | dmxdevfilter->eos_state) { |
Mauro Carvalho Chehab | 2810016 | 2009-02-16 15:27:44 -0300 | [diff] [blame] | 2706 | spin_unlock(&dmxdevfilter->dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | return 0; |
| 2708 | } |
| 2709 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2710 | if (dmxdevfilter->params.pes.output != DMX_OUT_TS_TAP) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2711 | buffer = &dmxdevfilter->buffer; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2712 | events = &dmxdevfilter->events; |
| 2713 | } else { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 2714 | buffer = &dmxdevfilter->dev->dvr_buffer; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2715 | events = &dmxdevfilter->dev->dvr_output_events; |
| 2716 | } |
| 2717 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | if (buffer->error) { |
Mauro Carvalho Chehab | 2810016 | 2009-02-16 15:27:44 -0300 | [diff] [blame] | 2719 | spin_unlock(&dmxdevfilter->dev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2720 | wake_up_all(&buffer->queue); |
| 2721 | return buffer->error; |
| 2722 | } |
| 2723 | |
| 2724 | if (!events->current_event_data_size) |
| 2725 | events->current_event_start_offset = buffer->pwrite; |
| 2726 | |
| 2727 | /* Verify output buffer has sufficient space, or report overflow */ |
| 2728 | free = dvb_ringbuffer_free(buffer); |
| 2729 | if (free < (buffer1_len + buffer2_len)) { |
| 2730 | pr_debug("%s: buffer overflow error, pid=%u\n", |
| 2731 | __func__, dmxdevfilter->params.pes.pid); |
| 2732 | buffer->error = -EOVERFLOW; |
| 2733 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2734 | wake_up_all(&buffer->queue); |
| 2735 | |
| 2736 | return -EOVERFLOW; |
| 2737 | } |
| 2738 | |
| 2739 | if (buffer1_len + buffer2_len) { |
| 2740 | dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len); |
| 2741 | dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len); |
| 2742 | |
| 2743 | events->current_event_data_size += (buffer1_len + buffer2_len); |
| 2744 | |
| 2745 | if ((dmxdevfilter->params.pes.output == DMX_OUT_TS_TAP || |
| 2746 | dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP) |
| 2747 | && events->current_event_data_size >= |
| 2748 | dmxdevfilter->params.pes.rec_chunk_size) { |
| 2749 | event.type = DMX_EVENT_NEW_REC_CHUNK; |
| 2750 | event.params.recording_chunk.offset = |
| 2751 | events->current_event_start_offset; |
| 2752 | event.params.recording_chunk.size = |
| 2753 | events->current_event_data_size; |
| 2754 | |
| 2755 | dvb_dmxdev_add_event(events, &event); |
| 2756 | events->current_event_data_size = 0; |
| 2757 | } |
| 2758 | } |
| 2759 | |
| 2760 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2761 | wake_up_all(&buffer->queue); |
| 2762 | return 0; |
| 2763 | } |
| 2764 | |
| 2765 | static int dvb_dmxdev_section_event_cb(struct dmx_section_filter *filter, |
| 2766 | struct dmx_data_ready *dmx_data_ready) |
| 2767 | { |
| 2768 | int res = 0; |
| 2769 | struct dmxdev_filter *dmxdevfilter = filter->priv; |
| 2770 | struct dmx_filter_event event; |
| 2771 | ssize_t free; |
| 2772 | |
| 2773 | if (!dmxdevfilter) { |
| 2774 | pr_err("%s: null filter. event type=%d (length=%d) will be discarded\n", |
| 2775 | __func__, dmx_data_ready->status, |
| 2776 | dmx_data_ready->data_length); |
| 2777 | return -EINVAL; |
| 2778 | } |
| 2779 | |
| 2780 | spin_lock(&dmxdevfilter->dev->lock); |
| 2781 | |
| 2782 | if (dmxdevfilter->buffer.error == -ETIMEDOUT || |
| 2783 | dmxdevfilter->state != DMXDEV_STATE_GO || |
| 2784 | dmxdevfilter->eos_state) { |
| 2785 | spin_unlock(&dmxdevfilter->dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | return 0; |
| 2787 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2788 | |
| 2789 | if (dmx_data_ready->data_length == 0) { |
| 2790 | if (dmx_data_ready->status == DMX_CRC_ERROR) { |
| 2791 | /* Section was dropped due to CRC error */ |
| 2792 | event.type = DMX_EVENT_SECTION_CRC_ERROR; |
| 2793 | dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
| 2794 | |
| 2795 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2796 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2797 | } else if (dmx_data_ready->status == DMX_OK_EOS) { |
| 2798 | event.type = DMX_EVENT_EOS; |
| 2799 | dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
| 2800 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2801 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2802 | } else if (dmx_data_ready->status == DMX_OK_MARKER) { |
| 2803 | event.type = DMX_EVENT_MARKER; |
| 2804 | event.params.marker.id = dmx_data_ready->marker.id; |
| 2805 | dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
| 2806 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2807 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2808 | } else if (dmx_data_ready->status == DMX_OK_SCRAMBLING_STATUS) { |
| 2809 | event.type = DMX_EVENT_SCRAMBLING_STATUS_CHANGE; |
| 2810 | event.params.scrambling_status = |
| 2811 | dmx_data_ready->scrambling_bits; |
| 2812 | dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
| 2813 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2814 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2815 | } else if (dmx_data_ready->status == DMX_OVERRUN_ERROR) { |
| 2816 | pr_debug("dmxdev: section filter overflow (pid=%u)\n", |
| 2817 | dmxdevfilter->params.sec.pid); |
| 2818 | /* Set buffer error to notify user overflow occurred */ |
| 2819 | dmxdevfilter->buffer.error = -EOVERFLOW; |
| 2820 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2821 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2822 | } else { |
| 2823 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2824 | } |
| 2825 | return 0; |
| 2826 | } |
| 2827 | |
| 2828 | event.type = DMX_EVENT_NEW_SECTION; |
| 2829 | event.params.section.base_offset = dmxdevfilter->buffer.pwrite; |
| 2830 | event.params.section.start_offset = dmxdevfilter->buffer.pwrite; |
| 2831 | event.params.section.total_length = dmx_data_ready->data_length; |
| 2832 | event.params.section.actual_length = dmx_data_ready->data_length; |
| 2833 | |
| 2834 | if (dmx_data_ready->status == DMX_MISSED_ERROR) |
| 2835 | event.params.section.flags = DMX_FILTER_CC_ERROR; |
| 2836 | else |
| 2837 | event.params.section.flags = 0; |
| 2838 | |
| 2839 | free = dvb_ringbuffer_free(&dmxdevfilter->buffer); |
| 2840 | if (free < dmx_data_ready->data_length) { |
| 2841 | pr_err("%s: invalid data length: data_length=%d > free=%zd\n", |
| 2842 | __func__, dmx_data_ready->data_length, free); |
| 2843 | } else { |
| 2844 | res = dvb_dmxdev_add_event(&dmxdevfilter->events, &event); |
| 2845 | DVB_RINGBUFFER_PUSH(&dmxdevfilter->buffer, |
| 2846 | dmx_data_ready->data_length); |
| 2847 | } |
| 2848 | |
Mauro Carvalho Chehab | 2810016 | 2009-02-16 15:27:44 -0300 | [diff] [blame] | 2849 | spin_unlock(&dmxdevfilter->dev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 2850 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 2851 | |
| 2852 | return res; |
| 2853 | } |
| 2854 | |
| 2855 | static int dvb_dmxdev_ts_event_cb(struct dmx_ts_feed *feed, |
| 2856 | struct dmx_data_ready *dmx_data_ready) |
| 2857 | { |
| 2858 | struct dmxdev_filter *dmxdevfilter = feed->priv; |
| 2859 | struct dvb_ringbuffer *buffer; |
| 2860 | struct dmxdev_events_queue *events; |
| 2861 | struct dmx_filter_event event; |
| 2862 | ssize_t free; |
| 2863 | |
| 2864 | if (!dmxdevfilter) { |
| 2865 | pr_err("%s: null filter (feed->is_filtering=%d) event type=%d (length=%d) will be discarded\n", |
| 2866 | __func__, feed->is_filtering, |
| 2867 | dmx_data_ready->status, |
| 2868 | dmx_data_ready->data_length); |
| 2869 | return -EINVAL; |
| 2870 | } |
| 2871 | |
| 2872 | spin_lock(&dmxdevfilter->dev->lock); |
| 2873 | |
| 2874 | if (dmxdevfilter->state != DMXDEV_STATE_GO || |
| 2875 | dmxdevfilter->eos_state) { |
| 2876 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2877 | return 0; |
| 2878 | } |
| 2879 | |
| 2880 | if (dmxdevfilter->params.pes.output != DMX_OUT_TS_TAP) { |
| 2881 | buffer = &dmxdevfilter->buffer; |
| 2882 | events = &dmxdevfilter->events; |
| 2883 | } else { |
| 2884 | buffer = &dmxdevfilter->dev->dvr_buffer; |
| 2885 | events = &dmxdevfilter->dev->dvr_output_events; |
| 2886 | } |
| 2887 | |
| 2888 | if (!buffer->error && dmx_data_ready->status == DMX_OVERRUN_ERROR) { |
| 2889 | pr_debug("dmxdev: %s filter buffer overflow (pid=%u)\n", |
| 2890 | dmxdevfilter->params.pes.output == DMX_OUT_DECODER ? |
| 2891 | "decoder" : "", |
| 2892 | dmxdevfilter->params.pes.pid); |
| 2893 | /* Set buffer error to notify user overflow occurred */ |
| 2894 | buffer->error = -EOVERFLOW; |
| 2895 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2896 | wake_up_all(&buffer->queue); |
| 2897 | return 0; |
| 2898 | } |
| 2899 | |
| 2900 | if (dmx_data_ready->status == DMX_OK_EOS) { |
| 2901 | /* Report partial recording chunk */ |
| 2902 | if ((dmxdevfilter->params.pes.output == DMX_OUT_TS_TAP || |
| 2903 | dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP) |
| 2904 | && events->current_event_data_size) { |
| 2905 | event.type = DMX_EVENT_NEW_REC_CHUNK; |
| 2906 | event.params.recording_chunk.offset = |
| 2907 | events->current_event_start_offset; |
| 2908 | event.params.recording_chunk.size = |
| 2909 | events->current_event_data_size; |
| 2910 | events->current_event_start_offset = |
| 2911 | (events->current_event_start_offset + |
| 2912 | events->current_event_data_size) % |
| 2913 | buffer->size; |
| 2914 | events->current_event_data_size = 0; |
| 2915 | dvb_dmxdev_add_event(events, &event); |
| 2916 | } |
| 2917 | |
| 2918 | dmxdevfilter->eos_state = 1; |
| 2919 | pr_debug("dmxdev: DMX_OK_EOS - entering EOS state\n"); |
| 2920 | event.type = DMX_EVENT_EOS; |
| 2921 | dvb_dmxdev_add_event(events, &event); |
| 2922 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2923 | wake_up_all(&buffer->queue); |
| 2924 | return 0; |
| 2925 | } |
| 2926 | |
| 2927 | if (dmx_data_ready->status == DMX_OK_MARKER) { |
| 2928 | pr_debug("dmxdev: DMX_OK_MARKER - id=%llu\n", |
| 2929 | dmx_data_ready->marker.id); |
| 2930 | event.type = DMX_EVENT_MARKER; |
| 2931 | event.params.marker.id = dmx_data_ready->marker.id; |
| 2932 | dvb_dmxdev_add_event(events, &event); |
| 2933 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2934 | wake_up_all(&buffer->queue); |
| 2935 | return 0; |
| 2936 | } |
| 2937 | |
| 2938 | if (dmx_data_ready->status == DMX_OK_PCR) { |
| 2939 | pr_debug("dmxdev: event callback DMX_OK_PCR\n"); |
| 2940 | event.type = DMX_EVENT_NEW_PCR; |
| 2941 | event.params.pcr.pcr = dmx_data_ready->pcr.pcr; |
| 2942 | event.params.pcr.stc = dmx_data_ready->pcr.stc; |
| 2943 | if (dmx_data_ready->pcr.disc_indicator_set) |
| 2944 | event.params.pcr.flags = |
| 2945 | DMX_FILTER_DISCONTINUITY_INDICATOR; |
| 2946 | else |
| 2947 | event.params.pcr.flags = 0; |
| 2948 | |
| 2949 | dvb_dmxdev_add_event(events, &event); |
| 2950 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2951 | wake_up_all(&buffer->queue); |
| 2952 | return 0; |
| 2953 | } |
| 2954 | |
| 2955 | if (dmx_data_ready->status == DMX_OK_IDX) { |
| 2956 | pr_debug("dmxdev: event callback DMX_OK_IDX\n"); |
| 2957 | event.type = DMX_EVENT_NEW_INDEX_ENTRY; |
| 2958 | event.params.index = dmx_data_ready->idx_event; |
| 2959 | |
| 2960 | dvb_dmxdev_add_event(events, &event); |
| 2961 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2962 | wake_up_all(&buffer->queue); |
| 2963 | return 0; |
| 2964 | } |
| 2965 | |
| 2966 | if (dmx_data_ready->status == DMX_OK_SCRAMBLING_STATUS) { |
| 2967 | event.type = DMX_EVENT_SCRAMBLING_STATUS_CHANGE; |
| 2968 | event.params.scrambling_status = |
| 2969 | dmx_data_ready->scrambling_bits; |
| 2970 | dvb_dmxdev_add_event(events, &event); |
| 2971 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2972 | wake_up_all(&buffer->queue); |
| 2973 | return 0; |
| 2974 | } |
| 2975 | |
| 2976 | if (dmx_data_ready->status == DMX_OK_DECODER_BUF) { |
| 2977 | event.type = DMX_EVENT_NEW_ES_DATA; |
| 2978 | event.params.es_data.buf_handle = dmx_data_ready->buf.handle; |
| 2979 | event.params.es_data.cookie = dmx_data_ready->buf.cookie; |
| 2980 | event.params.es_data.offset = dmx_data_ready->buf.offset; |
| 2981 | event.params.es_data.data_len = dmx_data_ready->buf.len; |
| 2982 | event.params.es_data.pts_valid = dmx_data_ready->buf.pts_exists; |
| 2983 | event.params.es_data.pts = dmx_data_ready->buf.pts; |
| 2984 | event.params.es_data.dts_valid = dmx_data_ready->buf.dts_exists; |
| 2985 | event.params.es_data.dts = dmx_data_ready->buf.dts; |
| 2986 | event.params.es_data.stc = dmx_data_ready->buf.stc; |
| 2987 | event.params.es_data.transport_error_indicator_counter = |
| 2988 | dmx_data_ready->buf.tei_counter; |
| 2989 | event.params.es_data.continuity_error_counter = |
| 2990 | dmx_data_ready->buf.cont_err_counter; |
| 2991 | event.params.es_data.ts_packets_num = |
| 2992 | dmx_data_ready->buf.ts_packets_num; |
| 2993 | event.params.es_data.ts_dropped_bytes = |
| 2994 | dmx_data_ready->buf.ts_dropped_bytes; |
| 2995 | dvb_dmxdev_add_event(events, &event); |
| 2996 | spin_unlock(&dmxdevfilter->dev->lock); |
| 2997 | wake_up_all(&buffer->queue); |
| 2998 | return 0; |
| 2999 | } |
| 3000 | |
| 3001 | if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) { |
| 3002 | spin_unlock(&dmxdevfilter->dev->lock); |
| 3003 | wake_up_all(&buffer->queue); |
| 3004 | return 0; |
| 3005 | } |
| 3006 | |
| 3007 | free = dvb_ringbuffer_free(buffer); |
| 3008 | if (free < dmx_data_ready->data_length) { |
| 3009 | pr_err("%s: invalid data length: data_length=%d > free=%zd\n", |
| 3010 | __func__, dmx_data_ready->data_length, free); |
| 3011 | |
| 3012 | spin_unlock(&dmxdevfilter->dev->lock); |
| 3013 | wake_up_all(&buffer->queue); |
| 3014 | return 0; |
| 3015 | } |
| 3016 | |
| 3017 | if (dmxdevfilter->params.pes.output == DMX_OUT_TAP) { |
| 3018 | if (dmx_data_ready->status == DMX_OK && |
| 3019 | !events->current_event_data_size) { |
| 3020 | events->current_event_start_offset = buffer->pwrite; |
| 3021 | } else if (dmx_data_ready->status == DMX_OK_PES_END) { |
| 3022 | event.type = DMX_EVENT_NEW_PES; |
| 3023 | |
| 3024 | event.params.pes.base_offset = |
| 3025 | events->current_event_start_offset; |
| 3026 | event.params.pes.start_offset = |
| 3027 | (events->current_event_start_offset + |
| 3028 | dmx_data_ready->pes_end.start_gap) % |
| 3029 | buffer->size; |
| 3030 | |
| 3031 | event.params.pes.actual_length = |
| 3032 | dmx_data_ready->pes_end.actual_length; |
| 3033 | event.params.pes.total_length = |
| 3034 | events->current_event_data_size; |
| 3035 | |
| 3036 | event.params.pes.flags = 0; |
| 3037 | if (dmx_data_ready->pes_end.disc_indicator_set) |
| 3038 | event.params.pes.flags |= |
| 3039 | DMX_FILTER_DISCONTINUITY_INDICATOR; |
| 3040 | if (dmx_data_ready->pes_end.pes_length_mismatch) |
| 3041 | event.params.pes.flags |= |
| 3042 | DMX_FILTER_PES_LENGTH_ERROR; |
| 3043 | |
| 3044 | event.params.pes.stc = dmx_data_ready->pes_end.stc; |
| 3045 | event.params.pes.transport_error_indicator_counter = |
| 3046 | dmx_data_ready->pes_end.tei_counter; |
| 3047 | event.params.pes.continuity_error_counter = |
| 3048 | dmx_data_ready->pes_end.cont_err_counter; |
| 3049 | event.params.pes.ts_packets_num = |
| 3050 | dmx_data_ready->pes_end.ts_packets_num; |
| 3051 | |
| 3052 | /* Do not report zero length PES */ |
| 3053 | if (event.params.pes.total_length) |
| 3054 | dvb_dmxdev_add_event(events, &event); |
| 3055 | |
| 3056 | events->current_event_data_size = 0; |
| 3057 | } |
| 3058 | } else if (!events->current_event_data_size) { |
| 3059 | events->current_event_start_offset = buffer->pwrite; |
| 3060 | } |
| 3061 | |
| 3062 | events->current_event_data_size += dmx_data_ready->data_length; |
| 3063 | DVB_RINGBUFFER_PUSH(buffer, dmx_data_ready->data_length); |
| 3064 | |
| 3065 | if ((dmxdevfilter->params.pes.output == DMX_OUT_TS_TAP) || |
| 3066 | (dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)) { |
| 3067 | while (events->current_event_data_size >= |
| 3068 | dmxdevfilter->params.pes.rec_chunk_size) { |
| 3069 | event.type = DMX_EVENT_NEW_REC_CHUNK; |
| 3070 | event.params.recording_chunk.offset = |
| 3071 | events->current_event_start_offset; |
| 3072 | event.params.recording_chunk.size = |
| 3073 | dmxdevfilter->params.pes.rec_chunk_size; |
| 3074 | events->current_event_data_size = |
| 3075 | events->current_event_data_size - |
| 3076 | dmxdevfilter->params.pes.rec_chunk_size; |
| 3077 | events->current_event_start_offset = |
| 3078 | (events->current_event_start_offset + |
| 3079 | dmxdevfilter->params.pes.rec_chunk_size) % |
| 3080 | buffer->size; |
| 3081 | |
| 3082 | dvb_dmxdev_add_event(events, &event); |
| 3083 | } |
| 3084 | } |
| 3085 | spin_unlock(&dmxdevfilter->dev->lock); |
| 3086 | wake_up_all(&buffer->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3087 | return 0; |
| 3088 | } |
| 3089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3090 | /* stop feed but only mark the specified filter as stopped (state set) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter) |
| 3092 | { |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3093 | struct dmxdev_feed *feed; |
| 3094 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3095 | dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); |
| 3096 | |
| 3097 | switch (dmxdevfilter->type) { |
| 3098 | case DMXDEV_TYPE_SEC: |
| 3099 | del_timer(&dmxdevfilter->timer); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3100 | dmxdevfilter->feed.sec.feed->stop_filtering( |
| 3101 | dmxdevfilter->feed.sec.feed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3102 | break; |
| 3103 | case DMXDEV_TYPE_PES: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3104 | list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) { |
| 3105 | if (dmxdevfilter->params.pes.output == DMX_OUT_TS_TAP) { |
| 3106 | dmxdevfilter->dev->dvr_feeds_count--; |
| 3107 | if (!dmxdevfilter->dev->dvr_feeds_count) |
| 3108 | dmxdevfilter->dev->dvr_feed = NULL; |
| 3109 | } |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3110 | feed->ts->stop_filtering(feed->ts); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3111 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3112 | break; |
| 3113 | default: |
| 3114 | return -EINVAL; |
| 3115 | } |
| 3116 | return 0; |
| 3117 | } |
| 3118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | /* start feed associated with the specified filter */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3120 | static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter) |
| 3121 | { |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3122 | struct dmxdev_feed *feed; |
| 3123 | int ret; |
| 3124 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3125 | dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3126 | |
| 3127 | switch (filter->type) { |
| 3128 | case DMXDEV_TYPE_SEC: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3129 | return filter->feed.sec.feed->start_filtering( |
| 3130 | filter->feed.sec.feed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3131 | case DMXDEV_TYPE_PES: |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3132 | list_for_each_entry(feed, &filter->feed.ts, next) { |
| 3133 | ret = feed->ts->start_filtering(feed->ts); |
| 3134 | if (ret < 0) { |
| 3135 | dvb_dmxdev_feed_stop(filter); |
| 3136 | return ret; |
| 3137 | } |
| 3138 | } |
| 3139 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3140 | default: |
| 3141 | return -EINVAL; |
| 3142 | } |
| 3143 | |
| 3144 | return 0; |
| 3145 | } |
| 3146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3147 | /* restart section feed if it has filters left associated with it, |
| 3148 | otherwise release the feed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter) |
| 3150 | { |
| 3151 | int i; |
| 3152 | struct dmxdev *dmxdev = filter->dev; |
| 3153 | u16 pid = filter->params.sec.pid; |
| 3154 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3155 | for (i = 0; i < dmxdev->filternum; i++) |
| 3156 | if (dmxdev->filter[i].state >= DMXDEV_STATE_GO && |
| 3157 | dmxdev->filter[i].type == DMXDEV_TYPE_SEC && |
| 3158 | dmxdev->filter[i].params.sec.pid == pid) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3159 | dvb_dmxdev_feed_start(&dmxdev->filter[i]); |
| 3160 | return 0; |
| 3161 | } |
| 3162 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3163 | filter->dev->demux->release_section_feed(dmxdev->demux, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3164 | filter->feed.sec.feed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3165 | |
| 3166 | return 0; |
| 3167 | } |
| 3168 | |
| 3169 | static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter) |
| 3170 | { |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3171 | struct dmxdev_feed *feed; |
| 3172 | struct dmx_demux *demux; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3173 | struct ts_insertion_buffer *ts_buffer; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3174 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3175 | if (dmxdevfilter->state < DMXDEV_STATE_GO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3176 | return 0; |
| 3177 | |
| 3178 | switch (dmxdevfilter->type) { |
| 3179 | case DMXDEV_TYPE_SEC: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3180 | if (!dmxdevfilter->feed.sec.feed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3181 | break; |
| 3182 | dvb_dmxdev_feed_stop(dmxdevfilter); |
| 3183 | if (dmxdevfilter->filter.sec) |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3184 | dmxdevfilter->feed.sec.feed-> |
| 3185 | release_filter(dmxdevfilter->feed.sec.feed, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3186 | dmxdevfilter->filter.sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3187 | dvb_dmxdev_feed_restart(dmxdevfilter); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3188 | dmxdevfilter->feed.sec.feed = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3189 | break; |
| 3190 | case DMXDEV_TYPE_PES: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | dvb_dmxdev_feed_stop(dmxdevfilter); |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3192 | demux = dmxdevfilter->dev->demux; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3193 | |
| 3194 | if (!list_empty(&dmxdevfilter->insertion_buffers)) { |
| 3195 | feed = list_first_entry(&dmxdevfilter->feed.ts, |
| 3196 | struct dmxdev_feed, next); |
| 3197 | |
| 3198 | list_for_each_entry(ts_buffer, |
| 3199 | &dmxdevfilter->insertion_buffers, next) |
| 3200 | dvb_dmxdev_cancel_ts_insertion(ts_buffer); |
| 3201 | if (feed->ts->ts_insertion_terminate) |
| 3202 | feed->ts->ts_insertion_terminate(feed->ts); |
| 3203 | } |
| 3204 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3205 | list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) { |
| 3206 | demux->release_ts_feed(demux, feed->ts); |
| 3207 | feed->ts = NULL; |
| 3208 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3209 | break; |
| 3210 | default: |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3211 | if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3212 | return 0; |
| 3213 | return -EINVAL; |
| 3214 | } |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 3215 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3216 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 3217 | dvb_dmxdev_flush_output(&dmxdevfilter->buffer, &dmxdevfilter->events); |
| 3218 | dvb_ringbuffer_reset(&dmxdevfilter->buffer); |
| 3219 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 3220 | |
| 3221 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 3222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3223 | return 0; |
| 3224 | } |
| 3225 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3226 | static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter) |
| 3227 | { |
| 3228 | struct dmxdev_feed *feed, *tmp; |
| 3229 | |
| 3230 | /* delete all PIDs */ |
| 3231 | list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) { |
| 3232 | list_del(&feed->next); |
| 3233 | kfree(feed); |
| 3234 | } |
| 3235 | |
| 3236 | BUG_ON(!list_empty(&dmxdevfilter->feed.ts)); |
| 3237 | } |
| 3238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3239 | static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter) |
| 3240 | { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3241 | if (dmxdevfilter->state < DMXDEV_STATE_SET) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | return 0; |
| 3243 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3244 | if (dmxdevfilter->type == DMXDEV_TYPE_PES) |
| 3245 | dvb_dmxdev_delete_pids(dmxdevfilter); |
| 3246 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3247 | dmxdevfilter->type = DMXDEV_TYPE_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3248 | dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); |
| 3249 | return 0; |
| 3250 | } |
| 3251 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3252 | static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev, |
| 3253 | struct dmxdev_filter *filter, |
| 3254 | struct dmxdev_feed *feed) |
| 3255 | { |
Arnd Bergmann | e95be15 | 2016-06-17 17:46:28 -0300 | [diff] [blame] | 3256 | ktime_t timeout = ktime_set(0, 0); |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3257 | struct dmx_pes_filter_params *para = &filter->params.pes; |
| 3258 | dmx_output_t otype; |
| 3259 | int ret; |
| 3260 | int ts_type; |
Mauro Carvalho Chehab | fde04ab | 2013-04-04 13:25:30 -0300 | [diff] [blame] | 3261 | enum dmx_ts_pes ts_pes; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3262 | struct dmx_ts_feed *tsfeed; |
| 3263 | |
| 3264 | feed->ts = NULL; |
| 3265 | otype = para->output; |
| 3266 | |
Mauro Carvalho Chehab | 9ae2ae3 | 2010-12-27 11:41:14 -0300 | [diff] [blame] | 3267 | ts_pes = para->pes_type; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3268 | |
| 3269 | if (ts_pes < DMX_PES_OTHER) |
| 3270 | ts_type = TS_DECODER; |
| 3271 | else |
| 3272 | ts_type = 0; |
| 3273 | |
| 3274 | if (otype == DMX_OUT_TS_TAP) |
| 3275 | ts_type |= TS_PACKET; |
| 3276 | else if (otype == DMX_OUT_TSDEMUX_TAP) |
| 3277 | ts_type |= TS_PACKET | TS_DEMUX; |
| 3278 | else if (otype == DMX_OUT_TAP) |
| 3279 | ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY; |
| 3280 | |
| 3281 | ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts, |
| 3282 | dvb_dmxdev_ts_callback); |
| 3283 | if (ret < 0) |
| 3284 | return ret; |
| 3285 | |
| 3286 | tsfeed = feed->ts; |
| 3287 | tsfeed->priv = filter; |
| 3288 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3289 | if (filter->params.pes.output == DMX_OUT_TS_TAP) { |
| 3290 | tsfeed->buffer.ringbuff = &dmxdev->dvr_buffer; |
| 3291 | tsfeed->buffer.priv_handle = dmxdev->dvr_priv_buff_handle; |
| 3292 | if (!dmxdev->dvr_feeds_count) |
| 3293 | dmxdev->dvr_feed = filter; |
| 3294 | dmxdev->dvr_feeds_count++; |
| 3295 | } else if (filter->params.pes.output == DMX_OUT_DECODER) { |
| 3296 | tsfeed->buffer.ringbuff = &filter->buffer; |
| 3297 | tsfeed->decoder_buffers = &filter->decoder_buffers; |
| 3298 | tsfeed->buffer.priv_handle = filter->priv_buff_handle; |
| 3299 | } else { |
| 3300 | tsfeed->buffer.ringbuff = &filter->buffer; |
| 3301 | tsfeed->buffer.priv_handle = filter->priv_buff_handle; |
| 3302 | } |
| 3303 | |
| 3304 | if (tsfeed->data_ready_cb) { |
| 3305 | ret = tsfeed->data_ready_cb(tsfeed, dvb_dmxdev_ts_event_cb); |
| 3306 | |
| 3307 | if (ret < 0) { |
| 3308 | dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed); |
| 3309 | return ret; |
| 3310 | } |
| 3311 | } |
| 3312 | |
| 3313 | ret = tsfeed->set(tsfeed, feed->pid, |
| 3314 | ts_type, ts_pes, |
| 3315 | filter->decoder_buffers.buffers_size, |
| 3316 | timeout); |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3317 | if (ret < 0) { |
| 3318 | dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed); |
| 3319 | return ret; |
| 3320 | } |
| 3321 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3322 | if (tsfeed->set_tsp_out_format) |
| 3323 | tsfeed->set_tsp_out_format(tsfeed, filter->dmx_tsp_format); |
| 3324 | |
| 3325 | if (tsfeed->set_secure_mode) |
| 3326 | tsfeed->set_secure_mode(tsfeed, &filter->sec_mode); |
| 3327 | |
| 3328 | if (tsfeed->set_cipher_ops) |
| 3329 | tsfeed->set_cipher_ops(tsfeed, &feed->cipher_ops); |
| 3330 | |
| 3331 | if ((para->pes_type == DMX_PES_VIDEO0) || |
| 3332 | (para->pes_type == DMX_PES_VIDEO1) || |
| 3333 | (para->pes_type == DMX_PES_VIDEO2) || |
| 3334 | (para->pes_type == DMX_PES_VIDEO3)) { |
| 3335 | if (tsfeed->set_video_codec) { |
| 3336 | ret = tsfeed->set_video_codec(tsfeed, |
| 3337 | para->video_codec); |
| 3338 | |
| 3339 | if (ret < 0) { |
| 3340 | dmxdev->demux->release_ts_feed(dmxdev->demux, |
| 3341 | tsfeed); |
| 3342 | return ret; |
| 3343 | } |
| 3344 | } |
| 3345 | } |
| 3346 | |
| 3347 | if ((filter->params.pes.output == DMX_OUT_TS_TAP) || |
| 3348 | (filter->params.pes.output == DMX_OUT_TSDEMUX_TAP)) |
| 3349 | if (tsfeed->set_idx_params) { |
| 3350 | ret = tsfeed->set_idx_params( |
| 3351 | tsfeed, &feed->idx_params); |
| 3352 | if (ret) { |
| 3353 | dmxdev->demux->release_ts_feed(dmxdev->demux, |
| 3354 | tsfeed); |
| 3355 | return ret; |
| 3356 | } |
| 3357 | } |
| 3358 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3359 | ret = tsfeed->start_filtering(tsfeed); |
| 3360 | if (ret < 0) { |
| 3361 | dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed); |
| 3362 | return ret; |
| 3363 | } |
| 3364 | |
| 3365 | return 0; |
| 3366 | } |
| 3367 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3368 | static int dvb_filter_external_buffer_only(struct dmxdev *dmxdev, |
| 3369 | struct dmxdev_filter *filter) |
| 3370 | { |
| 3371 | struct dmx_caps caps; |
| 3372 | int is_external_only; |
| 3373 | int flags; |
| 3374 | |
| 3375 | /* |
| 3376 | * For backward compatibility, default assumes that |
| 3377 | * external only buffers are not supported. |
| 3378 | */ |
| 3379 | flags = 0; |
| 3380 | if (dmxdev->demux->get_caps) { |
| 3381 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 3382 | |
| 3383 | if (filter->type == DMXDEV_TYPE_SEC) |
| 3384 | flags = caps.section.flags; |
| 3385 | else if (filter->params.pes.output == DMX_OUT_DECODER) |
| 3386 | /* For decoder filters dmxdev buffer is not required */ |
| 3387 | flags = 0; |
| 3388 | else if (filter->params.pes.output == DMX_OUT_TAP) |
| 3389 | flags = caps.pes.flags; |
| 3390 | else if (filter->dmx_tsp_format == DMX_TSP_FORMAT_188) |
| 3391 | flags = caps.recording_188_tsp.flags; |
| 3392 | else |
| 3393 | flags = caps.recording_192_tsp.flags; |
| 3394 | } |
| 3395 | |
| 3396 | if (!(flags & DMX_BUFFER_INTERNAL_SUPPORT) && |
| 3397 | (flags & DMX_BUFFER_EXTERNAL_SUPPORT)) |
| 3398 | is_external_only = 1; |
| 3399 | else |
| 3400 | is_external_only = 0; |
| 3401 | |
| 3402 | return is_external_only; |
| 3403 | } |
| 3404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3405 | static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter) |
| 3406 | { |
| 3407 | struct dmxdev *dmxdev = filter->dev; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3408 | struct dmxdev_feed *feed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3409 | void *mem; |
| 3410 | int ret, i; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3411 | size_t tsp_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3412 | |
| 3413 | if (filter->state < DMXDEV_STATE_SET) |
| 3414 | return -EINVAL; |
| 3415 | |
| 3416 | if (filter->state >= DMXDEV_STATE_GO) |
| 3417 | dvb_dmxdev_filter_stop(filter); |
| 3418 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3419 | if (!dvb_filter_verify_buffer_size(filter)) |
| 3420 | return -EINVAL; |
| 3421 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 3422 | if (!filter->buffer.data) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3423 | /* |
| 3424 | * dmxdev buffer in decoder filters is not really used |
| 3425 | * to exchange data with applications. Decoder buffers |
| 3426 | * can be set using DMX_SET_DECODER_BUFFER, which |
| 3427 | * would not update the filter->buffer.data at all. |
| 3428 | * Therefore we should not treat this filter as |
| 3429 | * other regular filters and should not fail here |
| 3430 | * even if user sets the buffer in deocder |
| 3431 | * filter as external buffer. |
| 3432 | */ |
| 3433 | if (filter->type == DMXDEV_TYPE_PES && |
| 3434 | (filter->params.pes.output == DMX_OUT_DECODER || |
| 3435 | filter->params.pes.output == DMX_OUT_TS_TAP)) |
| 3436 | filter->buffer_mode = DMX_BUFFER_MODE_INTERNAL; |
| 3437 | |
| 3438 | if (!(filter->type == DMXDEV_TYPE_PES && |
| 3439 | filter->params.pes.output == DMX_OUT_TS_TAP) && |
| 3440 | (filter->buffer_mode == DMX_BUFFER_MODE_EXTERNAL || |
| 3441 | dvb_filter_external_buffer_only(dmxdev, filter))) |
| 3442 | return -ENOMEM; |
| 3443 | |
| 3444 | mem = vmalloc_user(filter->buffer.size); |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 3445 | if (!mem) |
| 3446 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3447 | spin_lock_irq(&filter->dev->lock); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3448 | filter->buffer.data = mem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3449 | spin_unlock_irq(&filter->dev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3450 | } else if ((filter->buffer_mode == DMX_BUFFER_MODE_INTERNAL) && |
| 3451 | dvb_filter_external_buffer_only(dmxdev, filter)) { |
| 3452 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3453 | } |
| 3454 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3455 | filter->eos_state = 0; |
| 3456 | |
| 3457 | spin_lock_irq(&filter->dev->lock); |
| 3458 | dvb_dmxdev_flush_output(&filter->buffer, &filter->events); |
| 3459 | spin_unlock_irq(&filter->dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3460 | |
| 3461 | switch (filter->type) { |
| 3462 | case DMXDEV_TYPE_SEC: |
| 3463 | { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3464 | struct dmx_sct_filter_params *para = &filter->params.sec; |
| 3465 | struct dmx_section_filter **secfilter = &filter->filter.sec; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3466 | struct dmx_section_feed **secfeed = &filter->feed.sec.feed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3467 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3468 | *secfilter = NULL; |
| 3469 | *secfeed = NULL; |
| 3470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | /* find active filter/feed with same PID */ |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3472 | for (i = 0; i < dmxdev->filternum; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3473 | if (dmxdev->filter[i].state >= DMXDEV_STATE_GO && |
Andreas Oberritter | 09794a6 | 2006-03-10 15:21:28 -0300 | [diff] [blame] | 3474 | dmxdev->filter[i].type == DMXDEV_TYPE_SEC && |
| 3475 | dmxdev->filter[i].params.sec.pid == para->pid) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3476 | *secfeed = dmxdev->filter[i].feed.sec.feed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3477 | break; |
| 3478 | } |
| 3479 | } |
| 3480 | |
| 3481 | /* if no feed found, try to allocate new one */ |
| 3482 | if (!*secfeed) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3483 | ret = dmxdev->demux->allocate_section_feed(dmxdev->demux, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3484 | secfeed, |
| 3485 | dvb_dmxdev_section_callback); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3486 | if (ret < 0) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3487 | pr_err("DVB (%s): could not alloc feed\n", |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 3488 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3489 | return ret; |
| 3490 | } |
| 3491 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3492 | if ((*secfeed)->data_ready_cb) { |
| 3493 | ret = (*secfeed)->data_ready_cb( |
| 3494 | *secfeed, |
| 3495 | dvb_dmxdev_section_event_cb); |
| 3496 | |
| 3497 | if (ret < 0) { |
| 3498 | pr_err( |
| 3499 | "DVB (%s): could not set event cb\n", |
| 3500 | __func__); |
| 3501 | dvb_dmxdev_feed_restart(filter); |
| 3502 | return ret; |
| 3503 | } |
| 3504 | } |
| 3505 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3506 | ret = (*secfeed)->set(*secfeed, para->pid, 32768, |
| 3507 | (para->flags & DMX_CHECK_CRC) ? 1 : 0); |
| 3508 | if (ret < 0) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3509 | pr_err("DVB (%s): could not set feed\n", |
| 3510 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3511 | dvb_dmxdev_feed_restart(filter); |
| 3512 | return ret; |
| 3513 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3514 | |
| 3515 | if ((*secfeed)->set_secure_mode) |
| 3516 | (*secfeed)->set_secure_mode(*secfeed, |
| 3517 | &filter->sec_mode); |
| 3518 | |
| 3519 | if ((*secfeed)->set_cipher_ops) |
| 3520 | (*secfeed)->set_cipher_ops(*secfeed, |
| 3521 | &filter->feed.sec.cipher_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3522 | } else { |
| 3523 | dvb_dmxdev_feed_stop(filter); |
| 3524 | } |
| 3525 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3526 | ret = (*secfeed)->allocate_filter(*secfeed, secfilter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3527 | if (ret < 0) { |
| 3528 | dvb_dmxdev_feed_restart(filter); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3529 | filter->feed.sec.feed->start_filtering(*secfeed); |
| 3530 | pr_debug("could not get filter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3531 | return ret; |
| 3532 | } |
| 3533 | |
| 3534 | (*secfilter)->priv = filter; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3535 | (*secfilter)->buffer.ringbuff = &filter->buffer; |
| 3536 | (*secfilter)->buffer.priv_handle = filter->priv_buff_handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3537 | |
| 3538 | memcpy(&((*secfilter)->filter_value[3]), |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3539 | &(para->filter.filter[1]), DMX_FILTER_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3540 | memcpy(&(*secfilter)->filter_mask[3], |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3541 | ¶->filter.mask[1], DMX_FILTER_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3542 | memcpy(&(*secfilter)->filter_mode[3], |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3543 | ¶->filter.mode[1], DMX_FILTER_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3544 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3545 | (*secfilter)->filter_value[0] = para->filter.filter[0]; |
| 3546 | (*secfilter)->filter_mask[0] = para->filter.mask[0]; |
| 3547 | (*secfilter)->filter_mode[0] = para->filter.mode[0]; |
| 3548 | (*secfilter)->filter_mask[1] = 0; |
| 3549 | (*secfilter)->filter_mask[2] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3550 | |
| 3551 | filter->todo = 0; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3552 | filter->events.data_read_event_masked = |
| 3553 | filter->events.event_mask.disable_mask & |
| 3554 | DMX_EVENT_NEW_SECTION; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3555 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3556 | ret = filter->feed.sec.feed->start_filtering( |
| 3557 | filter->feed.sec.feed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3558 | if (ret < 0) |
| 3559 | return ret; |
| 3560 | |
| 3561 | dvb_dmxdev_filter_timer(filter); |
| 3562 | break; |
| 3563 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | case DMXDEV_TYPE_PES: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3565 | if (filter->params.pes.rec_chunk_size < |
| 3566 | DMX_REC_BUFF_CHUNK_MIN_SIZE) |
| 3567 | filter->params.pes.rec_chunk_size = |
| 3568 | DMX_REC_BUFF_CHUNK_MIN_SIZE; |
| 3569 | |
| 3570 | if (filter->params.pes.rec_chunk_size >= |
| 3571 | filter->buffer.size) |
| 3572 | filter->params.pes.rec_chunk_size = |
| 3573 | filter->buffer.size >> 2; |
| 3574 | |
| 3575 | /* Align rec-chunk based on output format */ |
| 3576 | if (filter->dmx_tsp_format == DMX_TSP_FORMAT_188) |
| 3577 | tsp_size = 188; |
| 3578 | else |
| 3579 | tsp_size = 192; |
| 3580 | |
| 3581 | filter->params.pes.rec_chunk_size /= tsp_size; |
| 3582 | filter->params.pes.rec_chunk_size *= tsp_size; |
| 3583 | |
| 3584 | if (filter->params.pes.output == DMX_OUT_TS_TAP) |
| 3585 | dmxdev->dvr_output_events.data_read_event_masked = |
| 3586 | dmxdev->dvr_output_events.event_mask.disable_mask & |
| 3587 | DMX_EVENT_NEW_REC_CHUNK; |
| 3588 | else if (filter->params.pes.output == DMX_OUT_TSDEMUX_TAP) |
| 3589 | filter->events.data_read_event_masked = |
| 3590 | filter->events.event_mask.disable_mask & |
| 3591 | DMX_EVENT_NEW_REC_CHUNK; |
| 3592 | else if (filter->params.pes.output == DMX_OUT_TAP) |
| 3593 | filter->events.data_read_event_masked = |
| 3594 | filter->events.event_mask.disable_mask & |
| 3595 | DMX_EVENT_NEW_PES; |
| 3596 | else |
| 3597 | filter->events.data_read_event_masked = 1; |
| 3598 | |
| 3599 | ret = 0; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3600 | list_for_each_entry(feed, &filter->feed.ts, next) { |
| 3601 | ret = dvb_dmxdev_start_feed(dmxdev, filter, feed); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3602 | if (ret) |
| 3603 | break; |
| 3604 | } |
| 3605 | |
| 3606 | if (!ret) |
| 3607 | break; |
| 3608 | |
| 3609 | /* cleanup feeds that were started before the failure */ |
| 3610 | list_for_each_entry(feed, &filter->feed.ts, next) { |
| 3611 | if (!feed->ts) |
| 3612 | continue; |
| 3613 | feed->ts->stop_filtering(feed->ts); |
| 3614 | dmxdev->demux->release_ts_feed(dmxdev->demux, feed->ts); |
| 3615 | feed->ts = NULL; |
| 3616 | |
| 3617 | if (filter->params.pes.output == DMX_OUT_TS_TAP) { |
| 3618 | filter->dev->dvr_feeds_count--; |
| 3619 | if (!filter->dev->dvr_feeds_count) |
| 3620 | filter->dev->dvr_feed = NULL; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3621 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3622 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3623 | return ret; |
| 3624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3625 | default: |
| 3626 | return -EINVAL; |
| 3627 | } |
| 3628 | |
| 3629 | dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3630 | |
| 3631 | if ((filter->type == DMXDEV_TYPE_PES) && |
| 3632 | !list_empty(&filter->insertion_buffers)) { |
| 3633 | struct ts_insertion_buffer *ts_buffer; |
| 3634 | |
| 3635 | feed = list_first_entry(&filter->feed.ts, |
| 3636 | struct dmxdev_feed, next); |
| 3637 | |
| 3638 | ret = 0; |
| 3639 | if (feed->ts->ts_insertion_init) |
| 3640 | ret = feed->ts->ts_insertion_init(feed->ts); |
| 3641 | if (!ret) { |
| 3642 | list_for_each_entry(ts_buffer, |
| 3643 | &filter->insertion_buffers, next) |
| 3644 | dvb_dmxdev_queue_ts_insertion( |
| 3645 | ts_buffer); |
| 3646 | } else { |
| 3647 | pr_err("%s: ts_insertion_init failed, err %d\n", |
| 3648 | __func__, ret); |
| 3649 | } |
| 3650 | } |
| 3651 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3652 | return 0; |
| 3653 | } |
| 3654 | |
| 3655 | static int dvb_demux_open(struct inode *inode, struct file *file) |
| 3656 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 3657 | struct dvb_device *dvbdev = file->private_data; |
| 3658 | struct dmxdev *dmxdev = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | int i; |
| 3660 | struct dmxdev_filter *dmxdevfilter; |
| 3661 | |
| 3662 | if (!dmxdev->filter) |
| 3663 | return -EINVAL; |
| 3664 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 3665 | if (mutex_lock_interruptible(&dmxdev->mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3666 | return -ERESTARTSYS; |
| 3667 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3668 | for (i = 0; i < dmxdev->filternum; i++) |
| 3669 | if (dmxdev->filter[i].state == DMXDEV_STATE_FREE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3670 | break; |
| 3671 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3672 | if (i == dmxdev->filternum) { |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 3673 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3674 | return -EMFILE; |
| 3675 | } |
| 3676 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3677 | dmxdevfilter = &dmxdev->filter[i]; |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 3678 | mutex_init(&dmxdevfilter->mutex); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3679 | file->private_data = dmxdevfilter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3680 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3681 | memset(&dmxdevfilter->decoder_buffers, |
| 3682 | 0, |
| 3683 | sizeof(dmxdevfilter->decoder_buffers)); |
| 3684 | dmxdevfilter->decoder_buffers.buffers_size = |
| 3685 | DMX_DEFAULT_DECODER_BUFFER_SIZE; |
| 3686 | dmxdevfilter->buffer_mode = DMX_BUFFER_MODE_INTERNAL; |
| 3687 | dmxdevfilter->priv_buff_handle = NULL; |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 3688 | dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3689 | dvb_dmxdev_flush_events(&dmxdevfilter->events); |
| 3690 | dmxdevfilter->events.event_mask.disable_mask = DMX_EVENT_NEW_ES_DATA; |
| 3691 | dmxdevfilter->events.event_mask.no_wakeup_mask = 0; |
| 3692 | dmxdevfilter->events.event_mask.wakeup_threshold = 1; |
| 3693 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3694 | dmxdevfilter->type = DMXDEV_TYPE_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3695 | dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3696 | init_timer(&dmxdevfilter->timer); |
| 3697 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3698 | dmxdevfilter->sec_mode.is_secured = 0; |
| 3699 | |
| 3700 | INIT_LIST_HEAD(&dmxdevfilter->insertion_buffers); |
| 3701 | |
| 3702 | dmxdevfilter->dmx_tsp_format = DMX_TSP_FORMAT_188; |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 3703 | dvbdev->users++; |
| 3704 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 3705 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3706 | return 0; |
| 3707 | } |
| 3708 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3709 | static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev, |
| 3710 | struct dmxdev_filter *dmxdevfilter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3711 | { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3712 | struct ts_insertion_buffer *ts_buffer, *tmp; |
| 3713 | |
Simon Arlott | c278850 | 2007-03-10 06:21:25 -0300 | [diff] [blame] | 3714 | mutex_lock(&dmxdev->mutex); |
| 3715 | mutex_lock(&dmxdevfilter->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3716 | |
| 3717 | dvb_dmxdev_filter_stop(dmxdevfilter); |
| 3718 | dvb_dmxdev_filter_reset(dmxdevfilter); |
| 3719 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3720 | list_for_each_entry_safe(ts_buffer, tmp, |
| 3721 | &dmxdevfilter->insertion_buffers, next) { |
| 3722 | list_del(&ts_buffer->next); |
| 3723 | vfree(ts_buffer->buffer); |
| 3724 | vfree(ts_buffer); |
| 3725 | } |
| 3726 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | if (dmxdevfilter->buffer.data) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3728 | void *mem = dmxdevfilter->buffer.data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3729 | |
| 3730 | spin_lock_irq(&dmxdev->lock); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3731 | dmxdevfilter->buffer.data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | spin_unlock_irq(&dmxdev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3733 | if (dmxdevfilter->buffer_mode == DMX_BUFFER_MODE_INTERNAL) |
| 3734 | vfree(mem); |
| 3735 | } |
| 3736 | |
| 3737 | if ((dmxdevfilter->buffer_mode == DMX_BUFFER_MODE_EXTERNAL) && |
| 3738 | dmxdevfilter->priv_buff_handle) { |
| 3739 | dmxdev->demux->unmap_buffer(dmxdev->demux, |
| 3740 | dmxdevfilter->priv_buff_handle); |
| 3741 | dmxdevfilter->priv_buff_handle = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3742 | } |
| 3743 | |
| 3744 | dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3745 | wake_up_all(&dmxdevfilter->buffer.queue); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 3746 | mutex_unlock(&dmxdevfilter->mutex); |
| 3747 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3748 | return 0; |
| 3749 | } |
| 3750 | |
| 3751 | static inline void invert_mode(dmx_filter_t *filter) |
| 3752 | { |
| 3753 | int i; |
| 3754 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3755 | for (i = 0; i < DMX_FILTER_SIZE; i++) |
| 3756 | filter->mode[i] ^= 0xff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3757 | } |
| 3758 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3759 | static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev, |
| 3760 | struct dmxdev_filter *filter, u16 pid) |
| 3761 | { |
| 3762 | struct dmxdev_feed *feed; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3763 | int ret = 0; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3764 | |
| 3765 | if ((filter->type != DMXDEV_TYPE_PES) || |
| 3766 | (filter->state < DMXDEV_STATE_SET)) |
| 3767 | return -EINVAL; |
| 3768 | |
| 3769 | /* only TS packet filters may have multiple PIDs */ |
| 3770 | if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) && |
| 3771 | (!list_empty(&filter->feed.ts))) |
| 3772 | return -EINVAL; |
| 3773 | |
| 3774 | feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL); |
| 3775 | if (feed == NULL) |
| 3776 | return -ENOMEM; |
| 3777 | |
| 3778 | feed->pid = pid; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3779 | feed->cipher_ops.operations_count = 0; |
| 3780 | feed->idx_params.enable = 0; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3781 | |
| 3782 | if (filter->state >= DMXDEV_STATE_GO) |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3783 | ret = dvb_dmxdev_start_feed(dmxdev, filter, feed); |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3784 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3785 | if (!ret) |
| 3786 | list_add(&feed->next, &filter->feed.ts); |
| 3787 | else |
| 3788 | kfree(feed); |
| 3789 | |
| 3790 | return ret; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3791 | } |
| 3792 | |
| 3793 | static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev, |
| 3794 | struct dmxdev_filter *filter, u16 pid) |
| 3795 | { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3796 | int feed_count; |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3797 | struct dmxdev_feed *feed, *tmp; |
| 3798 | |
| 3799 | if ((filter->type != DMXDEV_TYPE_PES) || |
| 3800 | (filter->state < DMXDEV_STATE_SET)) |
| 3801 | return -EINVAL; |
| 3802 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3803 | feed_count = 0; |
| 3804 | list_for_each_entry(tmp, &filter->feed.ts, next) |
| 3805 | feed_count++; |
| 3806 | |
| 3807 | if (feed_count <= 1) |
| 3808 | return -EINVAL; |
| 3809 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3810 | list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3811 | if (feed->pid == pid) { |
| 3812 | if (feed->ts != NULL) { |
| 3813 | feed->ts->stop_filtering(feed->ts); |
| 3814 | filter->dev->demux->release_ts_feed( |
| 3815 | filter->dev->demux, |
| 3816 | feed->ts); |
| 3817 | } |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3818 | list_del(&feed->next); |
| 3819 | kfree(feed); |
| 3820 | } |
| 3821 | } |
| 3822 | |
| 3823 | return 0; |
| 3824 | } |
| 3825 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3826 | static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3827 | struct dmxdev_filter *dmxdevfilter, |
| 3828 | struct dmx_sct_filter_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3829 | { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3830 | pr_debug("function : %s, PID=0x%04x, flags=%02x, timeout=%d\n", |
Mauro Carvalho Chehab | 17e67d4 | 2013-03-01 15:20:25 -0300 | [diff] [blame] | 3831 | __func__, params->pid, params->flags, params->timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3832 | |
| 3833 | dvb_dmxdev_filter_stop(dmxdevfilter); |
| 3834 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3835 | dmxdevfilter->type = DMXDEV_TYPE_SEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3836 | memcpy(&dmxdevfilter->params.sec, |
| 3837 | params, sizeof(struct dmx_sct_filter_params)); |
| 3838 | invert_mode(&dmxdevfilter->params.sec.filter); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3839 | dmxdevfilter->feed.sec.cipher_ops.operations_count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); |
| 3841 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3842 | if (params->flags & DMX_IMMEDIATE_START) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3843 | return dvb_dmxdev_filter_start(dmxdevfilter); |
| 3844 | |
| 3845 | return 0; |
| 3846 | } |
| 3847 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3848 | static int dvb_dmxdev_set_secure_mode( |
| 3849 | struct dmxdev *dmxdev, |
| 3850 | struct dmxdev_filter *filter, |
| 3851 | struct dmx_secure_mode *sec_mode) |
| 3852 | { |
| 3853 | if (!dmxdev || !filter || !sec_mode) |
| 3854 | return -EINVAL; |
| 3855 | |
| 3856 | if (filter->state == DMXDEV_STATE_GO) { |
| 3857 | pr_err("%s: invalid filter state\n", __func__); |
| 3858 | return -EBUSY; |
| 3859 | } |
| 3860 | |
| 3861 | pr_debug("%s: secure=%d\n", __func__, sec_mode->is_secured); |
| 3862 | |
| 3863 | filter->sec_mode = *sec_mode; |
| 3864 | |
| 3865 | return 0; |
| 3866 | } |
| 3867 | |
| 3868 | static int dvb_dmxdev_set_cipher(struct dmxdev *dmxdev, |
| 3869 | struct dmxdev_filter *filter, |
| 3870 | struct dmx_cipher_operations *cipher_ops) |
| 3871 | { |
| 3872 | struct dmxdev_feed *feed; |
| 3873 | struct dmxdev_feed *ts_feed = NULL; |
| 3874 | struct dmxdev_sec_feed *sec_feed = NULL; |
| 3875 | struct dmx_caps caps; |
| 3876 | |
| 3877 | if (!dmxdev || !dmxdev->demux->get_caps) |
| 3878 | return -EINVAL; |
| 3879 | |
| 3880 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 3881 | |
| 3882 | if (!filter || !cipher_ops || |
| 3883 | (cipher_ops->operations_count > caps.num_cipher_ops) || |
| 3884 | (cipher_ops->operations_count > |
| 3885 | DMX_MAX_CIPHER_OPERATIONS_COUNT)) |
| 3886 | return -EINVAL; |
| 3887 | |
| 3888 | pr_debug("%s: pid=%d, operations=%d\n", __func__, |
| 3889 | cipher_ops->pid, cipher_ops->operations_count); |
| 3890 | |
| 3891 | if (filter->state < DMXDEV_STATE_SET || |
| 3892 | filter->state > DMXDEV_STATE_GO) { |
| 3893 | pr_err("%s: invalid filter state\n", __func__); |
| 3894 | return -EPERM; |
| 3895 | } |
| 3896 | |
| 3897 | if (!filter->sec_mode.is_secured && cipher_ops->operations_count) { |
| 3898 | pr_err("%s: secure mode must be enabled to set cipher ops\n", |
| 3899 | __func__); |
| 3900 | return -EPERM; |
| 3901 | } |
| 3902 | |
| 3903 | switch (filter->type) { |
| 3904 | case DMXDEV_TYPE_PES: |
| 3905 | list_for_each_entry(feed, &filter->feed.ts, next) { |
| 3906 | if (feed->pid == cipher_ops->pid) { |
| 3907 | ts_feed = feed; |
| 3908 | ts_feed->cipher_ops = *cipher_ops; |
| 3909 | if (filter->state == DMXDEV_STATE_GO && |
| 3910 | ts_feed->ts->set_cipher_ops) |
| 3911 | ts_feed->ts->set_cipher_ops( |
| 3912 | ts_feed->ts, cipher_ops); |
| 3913 | break; |
| 3914 | } |
| 3915 | } |
| 3916 | break; |
| 3917 | case DMXDEV_TYPE_SEC: |
| 3918 | if (filter->params.sec.pid == cipher_ops->pid) { |
| 3919 | sec_feed = &filter->feed.sec; |
| 3920 | sec_feed->cipher_ops = *cipher_ops; |
| 3921 | if (filter->state == DMXDEV_STATE_GO && |
| 3922 | sec_feed->feed->set_cipher_ops) |
| 3923 | sec_feed->feed->set_cipher_ops(sec_feed->feed, |
| 3924 | cipher_ops); |
| 3925 | } |
| 3926 | break; |
| 3927 | |
| 3928 | default: |
| 3929 | return -EINVAL; |
| 3930 | } |
| 3931 | |
| 3932 | if (!ts_feed && !sec_feed) { |
| 3933 | pr_err("%s: pid %d is undefined for this filter\n", |
| 3934 | __func__, cipher_ops->pid); |
| 3935 | return -EINVAL; |
| 3936 | } |
| 3937 | |
| 3938 | return 0; |
| 3939 | } |
| 3940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3941 | static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3942 | struct dmxdev_filter *dmxdevfilter, |
| 3943 | struct dmx_pes_filter_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | { |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3945 | int ret; |
| 3946 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | dvb_dmxdev_filter_stop(dmxdevfilter); |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3948 | dvb_dmxdev_filter_reset(dmxdevfilter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3949 | |
Mauro Carvalho Chehab | 31becf0 | 2012-10-27 15:30:47 -0300 | [diff] [blame] | 3950 | if ((unsigned)params->pes_type > DMX_PES_OTHER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | return -EINVAL; |
| 3952 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3953 | dmxdevfilter->type = DMXDEV_TYPE_PES; |
| 3954 | memcpy(&dmxdevfilter->params, params, |
| 3955 | sizeof(struct dmx_pes_filter_params)); |
Francesco Lavra | 691c9ae | 2010-02-07 09:49:58 -0300 | [diff] [blame] | 3956 | INIT_LIST_HEAD(&dmxdevfilter->feed.ts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3957 | |
| 3958 | dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); |
| 3959 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 3960 | ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, |
| 3961 | dmxdevfilter->params.pes.pid); |
| 3962 | if (ret < 0) |
| 3963 | return ret; |
| 3964 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 3965 | if (params->flags & DMX_IMMEDIATE_START) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3966 | return dvb_dmxdev_filter_start(dmxdevfilter); |
| 3967 | |
| 3968 | return 0; |
| 3969 | } |
| 3970 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 3971 | static int dvb_dmxdev_set_decoder_buffer(struct dmxdev *dmxdev, |
| 3972 | struct dmxdev_filter *filter, |
| 3973 | struct dmx_decoder_buffers *buffs) |
| 3974 | { |
| 3975 | int i; |
| 3976 | struct dmx_decoder_buffers *dec_buffs; |
| 3977 | struct dmx_caps caps; |
| 3978 | |
| 3979 | if (!dmxdev || !filter || !buffs) |
| 3980 | return -EINVAL; |
| 3981 | |
| 3982 | dec_buffs = &filter->decoder_buffers; |
| 3983 | if (!dmxdev->demux->get_caps) |
| 3984 | return -EINVAL; |
| 3985 | |
| 3986 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 3987 | if (!dvb_dmxdev_verify_buffer_size(buffs->buffers_size, |
| 3988 | caps.decoder.max_size, caps.decoder.size_alignment)) |
| 3989 | return -EINVAL; |
| 3990 | |
| 3991 | if ((buffs->buffers_size == 0) || |
| 3992 | (buffs->is_linear && |
| 3993 | ((buffs->buffers_num <= 1) || |
| 3994 | (buffs->buffers_num > DMX_MAX_DECODER_BUFFER_NUM)))) |
| 3995 | return -EINVAL; |
| 3996 | |
| 3997 | if (buffs->buffers_num == 0) { |
| 3998 | /* Internal mode - linear buffers not supported in this mode */ |
| 3999 | if (!(caps.decoder.flags & DMX_BUFFER_INTERNAL_SUPPORT) || |
| 4000 | buffs->is_linear) |
| 4001 | return -EINVAL; |
| 4002 | } else { |
| 4003 | /* External buffer(s) mode */ |
| 4004 | if ((!(caps.decoder.flags & DMX_BUFFER_LINEAR_GROUP_SUPPORT) && |
| 4005 | buffs->buffers_num > 1) || |
| 4006 | !(caps.decoder.flags & DMX_BUFFER_EXTERNAL_SUPPORT) || |
| 4007 | buffs->buffers_num > caps.decoder.max_buffer_num) |
| 4008 | return -EINVAL; |
| 4009 | |
| 4010 | dec_buffs->is_linear = buffs->is_linear; |
| 4011 | dec_buffs->buffers_num = buffs->buffers_num; |
| 4012 | dec_buffs->buffers_size = buffs->buffers_size; |
| 4013 | for (i = 0; i < dec_buffs->buffers_num; i++) |
| 4014 | dec_buffs->handles[i] = buffs->handles[i]; |
| 4015 | } |
| 4016 | |
| 4017 | return 0; |
| 4018 | } |
| 4019 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4020 | static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4021 | struct file *file, char __user *buf, |
| 4022 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4023 | { |
| 4024 | int result, hcount; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4025 | int done = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4026 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4027 | if (dfil->todo <= 0) { |
| 4028 | hcount = 3 + dfil->todo; |
| 4029 | if (hcount > count) |
| 4030 | hcount = count; |
Udaya Bhaskara Reddy Mallavarapu | ab460e7 | 2017-11-07 20:38:11 +0530 | [diff] [blame] | 4031 | if (hcount == 0) |
| 4032 | return done; |
| 4033 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4034 | result = dvb_dmxdev_buffer_read(dfil, &dfil->buffer, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4035 | file->f_flags & O_NONBLOCK, |
| 4036 | buf, hcount, ppos); |
| 4037 | if (result < 0) { |
| 4038 | dfil->todo = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4039 | return result; |
| 4040 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4041 | if (copy_from_user(dfil->secheader - dfil->todo, buf, result)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4042 | return -EFAULT; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4043 | buf += result; |
| 4044 | done = result; |
| 4045 | count -= result; |
| 4046 | dfil->todo -= result; |
| 4047 | if (dfil->todo > -3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4048 | return done; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4049 | dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4050 | if (!count) |
| 4051 | return done; |
| 4052 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4053 | if (count > dfil->todo) |
| 4054 | count = dfil->todo; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4055 | result = dvb_dmxdev_buffer_read(dfil, &dfil->buffer, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4056 | file->f_flags & O_NONBLOCK, |
| 4057 | buf, count, ppos); |
| 4058 | if (result < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4059 | return result; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4060 | dfil->todo -= result; |
| 4061 | return (result + done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4062 | } |
| 4063 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4064 | static ssize_t |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4065 | dvb_demux_read(struct file *file, char __user *buf, size_t count, |
| 4066 | loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4067 | { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4068 | struct dmxdev_filter *dmxdevfilter = file->private_data; |
| 4069 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4070 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4071 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4072 | return -ERESTARTSYS; |
| 4073 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4074 | if (dmxdevfilter->eos_state && |
| 4075 | dvb_ringbuffer_empty(&dmxdevfilter->buffer)) { |
| 4076 | mutex_unlock(&dmxdevfilter->mutex); |
| 4077 | return 0; |
| 4078 | } |
| 4079 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4080 | if (dmxdevfilter->type == DMXDEV_TYPE_SEC) |
| 4081 | ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4082 | else |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4083 | ret = dvb_dmxdev_buffer_read(dmxdevfilter, |
| 4084 | &dmxdevfilter->buffer, |
| 4085 | file->f_flags & O_NONBLOCK, |
| 4086 | buf, count, ppos); |
| 4087 | |
| 4088 | if (ret > 0) { |
| 4089 | dvb_dmxdev_notify_data_read(dmxdevfilter, ret); |
| 4090 | spin_lock_irq(&dmxdevfilter->dev->lock); |
| 4091 | dvb_dmxdev_update_events(&dmxdevfilter->events, ret); |
| 4092 | spin_unlock_irq(&dmxdevfilter->dev->lock); |
| 4093 | |
| 4094 | /* |
| 4095 | * in PULL mode, we might be stalling on |
| 4096 | * event queue, so need to wake-up waiters |
| 4097 | */ |
| 4098 | if (dmxdevfilter->dev->playback_mode == DMX_PB_MODE_PULL) |
| 4099 | wake_up_all(&dmxdevfilter->buffer.queue); |
| 4100 | } else if (ret == -EOVERFLOW) { |
| 4101 | dvb_dmxdev_auto_flush_buffer(dmxdevfilter, |
| 4102 | &dmxdevfilter->buffer); |
| 4103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4104 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4105 | mutex_unlock(&dmxdevfilter->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4106 | return ret; |
| 4107 | } |
| 4108 | |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 4109 | static int dvb_demux_do_ioctl(struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4110 | unsigned int cmd, void *parg) |
| 4111 | { |
Peter Beutner | 3ec4a30 | 2005-07-07 17:57:39 -0700 | [diff] [blame] | 4112 | struct dmxdev_filter *dmxdevfilter = file->private_data; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4113 | struct dmxdev *dmxdev = dmxdevfilter->dev; |
| 4114 | unsigned long arg = (unsigned long)parg; |
| 4115 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4116 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4117 | if (mutex_lock_interruptible(&dmxdev->mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4118 | return -ERESTARTSYS; |
| 4119 | |
| 4120 | switch (cmd) { |
| 4121 | case DMX_START: |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4122 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4123 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4124 | return -ERESTARTSYS; |
| 4125 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4126 | if (dmxdevfilter->state < DMXDEV_STATE_SET) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4127 | ret = -EINVAL; |
| 4128 | else |
| 4129 | ret = dvb_dmxdev_filter_start(dmxdevfilter); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4130 | mutex_unlock(&dmxdevfilter->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4131 | break; |
| 4132 | |
| 4133 | case DMX_STOP: |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4134 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4135 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4136 | return -ERESTARTSYS; |
| 4137 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4138 | ret = dvb_dmxdev_filter_stop(dmxdevfilter); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4139 | mutex_unlock(&dmxdevfilter->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4140 | break; |
| 4141 | |
| 4142 | case DMX_SET_FILTER: |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4143 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4144 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4145 | return -ERESTARTSYS; |
| 4146 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4147 | ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4148 | mutex_unlock(&dmxdevfilter->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4149 | break; |
| 4150 | |
| 4151 | case DMX_SET_PES_FILTER: |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4152 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4153 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4154 | return -ERESTARTSYS; |
| 4155 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4156 | ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4157 | mutex_unlock(&dmxdevfilter->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4158 | break; |
| 4159 | |
| 4160 | case DMX_SET_BUFFER_SIZE: |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4161 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4162 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4163 | return -ERESTARTSYS; |
| 4164 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4165 | ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4166 | mutex_unlock(&dmxdevfilter->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4167 | break; |
| 4168 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4169 | case DMX_SET_BUFFER_MODE: |
| 4170 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4171 | mutex_unlock(&dmxdev->mutex); |
| 4172 | return -ERESTARTSYS; |
| 4173 | } |
| 4174 | ret = dvb_dmxdev_set_buffer_mode(dmxdevfilter, |
| 4175 | *(enum dmx_buffer_mode *)parg); |
| 4176 | mutex_unlock(&dmxdevfilter->mutex); |
| 4177 | break; |
| 4178 | |
| 4179 | case DMX_SET_BUFFER: |
| 4180 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4181 | mutex_unlock(&dmxdev->mutex); |
| 4182 | return -ERESTARTSYS; |
| 4183 | } |
| 4184 | ret = dvb_dmxdev_set_buffer(dmxdevfilter, parg); |
| 4185 | mutex_unlock(&dmxdevfilter->mutex); |
| 4186 | break; |
| 4187 | |
| 4188 | case DMX_GET_BUFFER_STATUS: |
| 4189 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4190 | mutex_unlock(&dmxdev->mutex); |
| 4191 | return -ERESTARTSYS; |
| 4192 | } |
| 4193 | ret = dvb_dmxdev_get_buffer_status(dmxdevfilter, parg); |
| 4194 | mutex_unlock(&dmxdevfilter->mutex); |
| 4195 | break; |
| 4196 | |
| 4197 | case DMX_RELEASE_DATA: |
| 4198 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4199 | mutex_unlock(&dmxdev->mutex); |
| 4200 | return -ERESTARTSYS; |
| 4201 | } |
| 4202 | ret = dvb_dmxdev_release_data(dmxdevfilter, arg); |
| 4203 | mutex_unlock(&dmxdevfilter->mutex); |
| 4204 | break; |
| 4205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4206 | case DMX_GET_PES_PIDS: |
| 4207 | if (!dmxdev->demux->get_pes_pids) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4208 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4209 | break; |
| 4210 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4211 | dmxdev->demux->get_pes_pids(dmxdev->demux, parg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4212 | break; |
| 4213 | |
Andreas Oberritter | c051005 | 2005-09-09 13:02:21 -0700 | [diff] [blame] | 4214 | case DMX_GET_CAPS: |
| 4215 | if (!dmxdev->demux->get_caps) { |
| 4216 | ret = -EINVAL; |
| 4217 | break; |
| 4218 | } |
| 4219 | ret = dmxdev->demux->get_caps(dmxdev->demux, parg); |
| 4220 | break; |
| 4221 | |
| 4222 | case DMX_SET_SOURCE: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4223 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4224 | mutex_unlock(&dmxdev->mutex); |
| 4225 | return -ERESTARTSYS; |
| 4226 | } |
| 4227 | ret = dvb_dmxdev_set_source(dmxdevfilter, parg); |
| 4228 | mutex_unlock(&dmxdevfilter->mutex); |
| 4229 | break; |
| 4230 | |
| 4231 | case DMX_SET_TS_PACKET_FORMAT: |
| 4232 | if (!dmxdev->demux->set_tsp_format) { |
Andreas Oberritter | c051005 | 2005-09-09 13:02:21 -0700 | [diff] [blame] | 4233 | ret = -EINVAL; |
| 4234 | break; |
| 4235 | } |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4236 | |
| 4237 | if (dmxdevfilter->state >= DMXDEV_STATE_GO) { |
| 4238 | ret = -EBUSY; |
| 4239 | break; |
| 4240 | } |
| 4241 | ret = dmxdev->demux->set_tsp_format( |
| 4242 | dmxdev->demux, |
| 4243 | *(enum dmx_tsp_format_t *)parg); |
Andreas Oberritter | c051005 | 2005-09-09 13:02:21 -0700 | [diff] [blame] | 4244 | break; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4245 | |
| 4246 | case DMX_SET_TS_OUT_FORMAT: |
| 4247 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4248 | mutex_unlock(&dmxdev->mutex); |
| 4249 | return -ERESTARTSYS; |
| 4250 | } |
| 4251 | |
| 4252 | ret = dvb_dmxdev_set_tsp_out_format(dmxdevfilter, |
| 4253 | *(enum dmx_tsp_format_t *)parg); |
| 4254 | |
| 4255 | mutex_unlock(&dmxdevfilter->mutex); |
| 4256 | break; |
| 4257 | |
| 4258 | case DMX_SET_DECODER_BUFFER_SIZE: |
| 4259 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4260 | mutex_unlock(&dmxdev->mutex); |
| 4261 | return -ERESTARTSYS; |
| 4262 | } |
| 4263 | |
| 4264 | ret = dvb_dmxdev_set_decoder_buffer_size(dmxdevfilter, arg); |
| 4265 | mutex_unlock(&dmxdevfilter->mutex); |
| 4266 | break; |
| 4267 | |
| 4268 | case DMX_SET_PLAYBACK_MODE: |
| 4269 | ret = dvb_dmxdev_set_playback_mode( |
| 4270 | dmxdevfilter, |
| 4271 | *(enum dmx_playback_mode_t *)parg); |
| 4272 | break; |
| 4273 | |
| 4274 | case DMX_GET_EVENT: |
| 4275 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4276 | mutex_unlock(&dmxdev->mutex); |
| 4277 | return -ERESTARTSYS; |
| 4278 | } |
| 4279 | ret = dvb_dmxdev_get_event(dmxdevfilter, parg); |
| 4280 | mutex_unlock(&dmxdevfilter->mutex); |
| 4281 | break; |
Andreas Oberritter | c051005 | 2005-09-09 13:02:21 -0700 | [diff] [blame] | 4282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4283 | case DMX_GET_STC: |
| 4284 | if (!dmxdev->demux->get_stc) { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4285 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4286 | break; |
| 4287 | } |
| 4288 | ret = dmxdev->demux->get_stc(dmxdev->demux, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4289 | ((struct dmx_stc *)parg)->num, |
| 4290 | &((struct dmx_stc *)parg)->stc, |
| 4291 | &((struct dmx_stc *)parg)->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4292 | break; |
| 4293 | |
Andreas Oberritter | 1cb662a | 2009-07-14 20:28:50 -0300 | [diff] [blame] | 4294 | case DMX_ADD_PID: |
| 4295 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4296 | ret = -ERESTARTSYS; |
| 4297 | break; |
| 4298 | } |
| 4299 | ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg); |
| 4300 | mutex_unlock(&dmxdevfilter->mutex); |
| 4301 | break; |
| 4302 | |
| 4303 | case DMX_REMOVE_PID: |
| 4304 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4305 | ret = -ERESTARTSYS; |
| 4306 | break; |
| 4307 | } |
| 4308 | ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg); |
| 4309 | mutex_unlock(&dmxdevfilter->mutex); |
| 4310 | break; |
| 4311 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4312 | case DMX_SET_DECODER_BUFFER: |
| 4313 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4314 | ret = -ERESTARTSYS; |
| 4315 | break; |
| 4316 | } |
| 4317 | ret = dvb_dmxdev_set_decoder_buffer(dmxdev, dmxdevfilter, parg); |
| 4318 | mutex_unlock(&dmxdevfilter->mutex); |
| 4319 | break; |
| 4320 | |
| 4321 | case DMX_SET_SECURE_MODE: |
| 4322 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4323 | ret = -ERESTARTSYS; |
| 4324 | break; |
| 4325 | } |
| 4326 | ret = dvb_dmxdev_set_secure_mode(dmxdev, dmxdevfilter, parg); |
| 4327 | mutex_unlock(&dmxdevfilter->mutex); |
| 4328 | break; |
| 4329 | |
| 4330 | case DMX_SET_CIPHER: |
| 4331 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4332 | ret = -ERESTARTSYS; |
| 4333 | break; |
| 4334 | } |
| 4335 | ret = dvb_dmxdev_set_cipher(dmxdev, dmxdevfilter, parg); |
| 4336 | mutex_unlock(&dmxdevfilter->mutex); |
| 4337 | break; |
| 4338 | |
| 4339 | case DMX_REUSE_DECODER_BUFFER: |
| 4340 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4341 | mutex_unlock(&dmxdev->mutex); |
| 4342 | return -ERESTARTSYS; |
| 4343 | } |
| 4344 | ret = dvb_dmxdev_reuse_decoder_buf(dmxdevfilter, arg); |
| 4345 | mutex_unlock(&dmxdevfilter->mutex); |
| 4346 | break; |
| 4347 | |
| 4348 | case DMX_SET_EVENTS_MASK: |
| 4349 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4350 | mutex_unlock(&dmxdev->mutex); |
| 4351 | return -ERESTARTSYS; |
| 4352 | } |
| 4353 | ret = dvb_dmxdev_set_event_mask(dmxdevfilter, parg); |
| 4354 | mutex_unlock(&dmxdevfilter->mutex); |
| 4355 | break; |
| 4356 | |
| 4357 | case DMX_GET_EVENTS_MASK: |
| 4358 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4359 | mutex_unlock(&dmxdev->mutex); |
| 4360 | return -ERESTARTSYS; |
| 4361 | } |
| 4362 | ret = dvb_dmxdev_get_event_mask(dmxdevfilter, parg); |
| 4363 | mutex_unlock(&dmxdevfilter->mutex); |
| 4364 | break; |
| 4365 | |
| 4366 | case DMX_SET_INDEXING_PARAMS: |
| 4367 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4368 | mutex_unlock(&dmxdev->mutex); |
| 4369 | return -ERESTARTSYS; |
| 4370 | } |
| 4371 | ret = dvb_dmxdev_set_indexing_params(dmxdevfilter, parg); |
| 4372 | mutex_unlock(&dmxdevfilter->mutex); |
| 4373 | break; |
| 4374 | |
| 4375 | case DMX_SET_TS_INSERTION: |
| 4376 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4377 | mutex_unlock(&dmxdev->mutex); |
| 4378 | return -ERESTARTSYS; |
| 4379 | } |
| 4380 | ret = dvb_dmxdev_set_ts_insertion(dmxdevfilter, parg); |
| 4381 | mutex_unlock(&dmxdevfilter->mutex); |
| 4382 | break; |
| 4383 | |
| 4384 | case DMX_ABORT_TS_INSERTION: |
| 4385 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4386 | mutex_unlock(&dmxdev->mutex); |
| 4387 | return -ERESTARTSYS; |
| 4388 | } |
| 4389 | ret = dvb_dmxdev_abort_ts_insertion(dmxdevfilter, parg); |
| 4390 | mutex_unlock(&dmxdevfilter->mutex); |
| 4391 | break; |
| 4392 | |
| 4393 | case DMX_GET_SCRAMBLING_BITS: |
| 4394 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4395 | mutex_unlock(&dmxdev->mutex); |
| 4396 | return -ERESTARTSYS; |
| 4397 | } |
| 4398 | ret = dvb_dmxdev_get_scrambling_bits(dmxdevfilter, parg); |
| 4399 | mutex_unlock(&dmxdevfilter->mutex); |
| 4400 | break; |
| 4401 | |
| 4402 | case DMX_FLUSH_BUFFER: |
| 4403 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4404 | mutex_unlock(&dmxdev->mutex); |
| 4405 | return -ERESTARTSYS; |
| 4406 | } |
| 4407 | ret = dvb_dmxdev_flush_buffer(dmxdevfilter); |
| 4408 | mutex_unlock(&dmxdevfilter->mutex); |
| 4409 | break; |
| 4410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4411 | default: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4412 | pr_err("%s: unknown ioctl code (0x%x)\n", |
| 4413 | __func__, cmd); |
| 4414 | ret = -ENOIOCTLCMD; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4415 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4416 | } |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4417 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4418 | return ret; |
| 4419 | } |
| 4420 | |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 4421 | static long dvb_demux_ioctl(struct file *file, unsigned int cmd, |
| 4422 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4423 | { |
Arnd Bergmann | 72024f1 | 2010-09-11 19:56:45 +0200 | [diff] [blame] | 4424 | return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4425 | } |
| 4426 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4427 | #ifdef CONFIG_COMPAT |
| 4428 | |
| 4429 | struct dmx_set_ts_insertion32 { |
| 4430 | __u32 identifier; |
| 4431 | __u32 repetition_time; |
| 4432 | compat_uptr_t ts_packets; |
| 4433 | compat_size_t size; |
| 4434 | }; |
| 4435 | |
| 4436 | static long dmx_set_ts_insertion32_wrapper(struct file *file, unsigned int cmd, |
| 4437 | unsigned long arg) |
| 4438 | { |
| 4439 | int ret; |
| 4440 | struct dmx_set_ts_insertion32 dmx_ts_insert32; |
| 4441 | struct dmx_set_ts_insertion dmx_ts_insert; |
| 4442 | |
| 4443 | ret = copy_from_user(&dmx_ts_insert32, (void __user *)arg, |
| 4444 | sizeof(dmx_ts_insert32)); |
| 4445 | if (ret) { |
| 4446 | pr_err( |
| 4447 | "%s: copy dmx_set_ts_insertion32 from user failed, ret=%d\n", |
| 4448 | __func__, ret); |
| 4449 | return -EFAULT; |
| 4450 | } |
| 4451 | |
| 4452 | memset(&dmx_ts_insert, 0, sizeof(dmx_ts_insert)); |
| 4453 | dmx_ts_insert.identifier = dmx_ts_insert32.identifier; |
| 4454 | dmx_ts_insert.repetition_time = dmx_ts_insert32.repetition_time; |
| 4455 | dmx_ts_insert.ts_packets = compat_ptr(dmx_ts_insert32.ts_packets); |
| 4456 | dmx_ts_insert.size = dmx_ts_insert32.size; |
| 4457 | |
| 4458 | ret = dvb_demux_do_ioctl(file, DMX_SET_TS_INSERTION, &dmx_ts_insert); |
| 4459 | |
| 4460 | return ret; |
| 4461 | } |
| 4462 | |
| 4463 | #define DMX_SET_TS_INSERTION32 _IOW('o', 70, struct dmx_set_ts_insertion32) |
| 4464 | |
| 4465 | /* |
| 4466 | * compat ioctl is called whenever compatibility is required, i.e when a 32bit |
| 4467 | * process calls an ioctl for a 64bit kernel. |
| 4468 | */ |
| 4469 | static long dvb_demux_compat_ioctl(struct file *file, unsigned int cmd, |
| 4470 | unsigned long arg) |
| 4471 | { |
| 4472 | long ret = 0; |
| 4473 | |
| 4474 | switch (cmd) { |
| 4475 | case DMX_SET_TS_INSERTION32: |
| 4476 | ret = dmx_set_ts_insertion32_wrapper(file, cmd, arg); |
| 4477 | break; |
| 4478 | case DMX_SET_TS_INSERTION: |
| 4479 | pr_err("%s: 64bit ioctl code (0x%lx) used by 32bit userspace\n", |
| 4480 | __func__, DMX_SET_TS_INSERTION); |
| 4481 | ret = -ENOIOCTLCMD; |
| 4482 | break; |
| 4483 | default: |
| 4484 | /* use regular ioctl */ |
| 4485 | ret = dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl); |
| 4486 | } |
| 4487 | |
| 4488 | return ret; |
| 4489 | } |
| 4490 | #endif |
| 4491 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4492 | static unsigned int dvb_demux_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4493 | { |
Peter Beutner | 3ec4a30 | 2005-07-07 17:57:39 -0700 | [diff] [blame] | 4494 | struct dmxdev_filter *dmxdevfilter = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4495 | unsigned int mask = 0; |
| 4496 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4497 | if (!dmxdevfilter) |
| 4498 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4499 | |
| 4500 | poll_wait(file, &dmxdevfilter->buffer.queue, wait); |
| 4501 | |
| 4502 | if (dmxdevfilter->state != DMXDEV_STATE_GO && |
| 4503 | dmxdevfilter->state != DMXDEV_STATE_DONE && |
| 4504 | dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT) |
| 4505 | return 0; |
| 4506 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4507 | if (dmxdevfilter->buffer.error) { |
| 4508 | mask |= (POLLIN | POLLRDNORM | POLLERR); |
| 4509 | if (dmxdevfilter->buffer.error == -EOVERFLOW) |
| 4510 | mask |= POLLPRI; |
| 4511 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4512 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 4513 | if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer)) |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4514 | mask |= (POLLIN | POLLRDNORM); |
| 4515 | |
| 4516 | if (dmxdevfilter->events.wakeup_events_counter >= |
| 4517 | dmxdevfilter->events.event_mask.wakeup_threshold) |
| 4518 | mask |= POLLPRI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4519 | |
| 4520 | return mask; |
| 4521 | } |
| 4522 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4523 | static int dvb_demux_mmap(struct file *filp, struct vm_area_struct *vma) |
| 4524 | { |
| 4525 | struct dmxdev_filter *dmxdevfilter = filp->private_data; |
| 4526 | struct dmxdev *dmxdev = dmxdevfilter->dev; |
| 4527 | int ret; |
| 4528 | int vma_size; |
| 4529 | int buffer_size; |
| 4530 | |
| 4531 | vma_size = vma->vm_end - vma->vm_start; |
| 4532 | |
| 4533 | if (vma->vm_flags & VM_WRITE) |
| 4534 | return -EINVAL; |
| 4535 | |
| 4536 | if (mutex_lock_interruptible(&dmxdev->mutex)) |
| 4537 | return -ERESTARTSYS; |
| 4538 | |
| 4539 | if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { |
| 4540 | mutex_unlock(&dmxdev->mutex); |
| 4541 | return -ERESTARTSYS; |
| 4542 | } |
| 4543 | |
| 4544 | if ((!dmxdevfilter->buffer.data) || |
| 4545 | (dmxdevfilter->buffer_mode == DMX_BUFFER_MODE_EXTERNAL)) { |
| 4546 | mutex_unlock(&dmxdevfilter->mutex); |
| 4547 | mutex_unlock(&dmxdev->mutex); |
| 4548 | return -EINVAL; |
| 4549 | } |
| 4550 | |
| 4551 | /* Make sure requested mapping is not larger than buffer size */ |
| 4552 | buffer_size = dmxdevfilter->buffer.size + (PAGE_SIZE-1); |
| 4553 | buffer_size = buffer_size & ~(PAGE_SIZE-1); |
| 4554 | |
| 4555 | if (vma_size != buffer_size) { |
| 4556 | mutex_unlock(&dmxdevfilter->mutex); |
| 4557 | mutex_unlock(&dmxdev->mutex); |
| 4558 | return -EINVAL; |
| 4559 | } |
| 4560 | |
| 4561 | ret = remap_vmalloc_range(vma, dmxdevfilter->buffer.data, 0); |
| 4562 | if (ret) { |
| 4563 | mutex_unlock(&dmxdevfilter->mutex); |
| 4564 | mutex_unlock(&dmxdev->mutex); |
| 4565 | return ret; |
| 4566 | } |
| 4567 | |
| 4568 | vma->vm_flags |= VM_DONTDUMP; |
| 4569 | vma->vm_flags |= VM_DONTEXPAND; |
| 4570 | |
| 4571 | mutex_unlock(&dmxdevfilter->mutex); |
| 4572 | mutex_unlock(&dmxdev->mutex); |
| 4573 | |
| 4574 | return 0; |
| 4575 | } |
| 4576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4577 | static int dvb_demux_release(struct inode *inode, struct file *file) |
| 4578 | { |
Peter Beutner | 3ec4a30 | 2005-07-07 17:57:39 -0700 | [diff] [blame] | 4579 | struct dmxdev_filter *dmxdevfilter = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4580 | struct dmxdev *dmxdev = dmxdevfilter->dev; |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 4581 | int ret; |
| 4582 | |
| 4583 | ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter); |
| 4584 | |
| 4585 | mutex_lock(&dmxdev->mutex); |
| 4586 | dmxdev->dvbdev->users--; |
| 4587 | if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4588 | fops_put(file->f_op); |
| 4589 | file->f_op = NULL; |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 4590 | mutex_unlock(&dmxdev->mutex); |
| 4591 | wake_up(&dmxdev->dvbdev->wait_queue); |
| 4592 | } else |
| 4593 | mutex_unlock(&dmxdev->mutex); |
| 4594 | |
| 4595 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4596 | } |
| 4597 | |
Jan Engelhardt | 784e29d | 2009-01-11 06:12:43 -0300 | [diff] [blame] | 4598 | static const struct file_operations dvb_demux_fops = { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4599 | .owner = THIS_MODULE, |
| 4600 | .read = dvb_demux_read, |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 4601 | .unlocked_ioctl = dvb_demux_ioctl, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4602 | .open = dvb_demux_open, |
| 4603 | .release = dvb_demux_release, |
| 4604 | .poll = dvb_demux_poll, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 4605 | .llseek = default_llseek, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4606 | .mmap = dvb_demux_mmap, |
| 4607 | #ifdef CONFIG_COMPAT |
| 4608 | .compat_ioctl = dvb_demux_compat_ioctl, |
| 4609 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4610 | }; |
| 4611 | |
Mauro Carvalho Chehab | 8afd52e | 2015-01-02 22:28:53 -0300 | [diff] [blame] | 4612 | static const struct dvb_device dvbdev_demux = { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4613 | .priv = NULL, |
| 4614 | .users = 1, |
| 4615 | .writers = 1, |
Mauro Carvalho Chehab | 8afd52e | 2015-01-02 22:28:53 -0300 | [diff] [blame] | 4616 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
Mauro Carvalho Chehab | e4fd3bc | 2015-02-18 12:09:27 -0300 | [diff] [blame] | 4617 | .name = "dvb-demux", |
Mauro Carvalho Chehab | 8afd52e | 2015-01-02 22:28:53 -0300 | [diff] [blame] | 4618 | #endif |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4619 | .fops = &dvb_demux_fops |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4620 | }; |
| 4621 | |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 4622 | static int dvb_dvr_do_ioctl(struct file *file, |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4623 | unsigned int cmd, void *parg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4624 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 4625 | struct dvb_device *dvbdev = file->private_data; |
| 4626 | struct dmxdev *dmxdev = dvbdev->priv; |
Andrea Odetti | a095be4 | 2008-04-20 19:14:51 -0300 | [diff] [blame] | 4627 | unsigned long arg = (unsigned long)parg; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4628 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4629 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4630 | if (mutex_lock_interruptible(&dmxdev->mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4631 | return -ERESTARTSYS; |
| 4632 | |
| 4633 | switch (cmd) { |
| 4634 | case DMX_SET_BUFFER_SIZE: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4635 | ret = dvb_dvr_set_buffer_size(dmxdev, file->f_flags, arg); |
| 4636 | break; |
| 4637 | |
| 4638 | case DMX_SET_BUFFER_MODE: |
| 4639 | ret = dvb_dvr_set_buffer_mode(dmxdev, file->f_flags, |
| 4640 | *(enum dmx_buffer_mode *)parg); |
| 4641 | break; |
| 4642 | |
| 4643 | case DMX_SET_BUFFER: |
| 4644 | ret = dvb_dvr_set_buffer(dmxdev, file->f_flags, parg); |
| 4645 | break; |
| 4646 | |
| 4647 | case DMX_GET_BUFFER_STATUS: |
| 4648 | ret = dvb_dvr_get_buffer_status(dmxdev, file->f_flags, parg); |
| 4649 | break; |
| 4650 | |
| 4651 | case DMX_RELEASE_DATA: |
| 4652 | ret = dvb_dvr_release_data(dmxdev, file->f_flags, arg); |
| 4653 | break; |
| 4654 | |
| 4655 | case DMX_FEED_DATA: |
| 4656 | ret = dvb_dvr_feed_data(dmxdev, file->f_flags, arg); |
| 4657 | break; |
| 4658 | |
| 4659 | case DMX_GET_EVENT: |
| 4660 | ret = dvb_dvr_get_event(dmxdev, file->f_flags, parg); |
| 4661 | break; |
| 4662 | |
| 4663 | case DMX_PUSH_OOB_COMMAND: |
| 4664 | ret = dvb_dvr_push_oob_cmd(dmxdev, file->f_flags, parg); |
| 4665 | break; |
| 4666 | |
| 4667 | case DMX_FLUSH_BUFFER: |
| 4668 | ret = dvb_dvr_flush_buffer(dmxdev, file->f_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4669 | break; |
| 4670 | |
| 4671 | default: |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4672 | ret = -ENOIOCTLCMD; |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4673 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4674 | } |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4675 | mutex_unlock(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4676 | return ret; |
| 4677 | } |
| 4678 | |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 4679 | static long dvb_dvr_ioctl(struct file *file, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4680 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4681 | { |
Arnd Bergmann | 72024f1 | 2010-09-11 19:56:45 +0200 | [diff] [blame] | 4682 | return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4683 | } |
| 4684 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4685 | #ifdef CONFIG_COMPAT |
| 4686 | static long dvb_dvr_compat_ioctl(struct file *file, unsigned int cmd, |
| 4687 | unsigned long arg) |
| 4688 | { |
| 4689 | return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl); |
| 4690 | } |
| 4691 | #endif |
| 4692 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4693 | static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4694 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 4695 | struct dvb_device *dvbdev = file->private_data; |
| 4696 | struct dmxdev *dmxdev = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4697 | unsigned int mask = 0; |
| 4698 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4699 | pr_debug("function : %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4700 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4701 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4702 | poll_wait(file, &dmxdev->dvr_buffer.queue, wait); |
| 4703 | |
| 4704 | if (dmxdev->dvr_buffer.error) { |
| 4705 | mask |= (POLLIN | POLLRDNORM | POLLERR); |
| 4706 | if (dmxdev->dvr_buffer.error == -EOVERFLOW) |
| 4707 | mask |= POLLPRI; |
| 4708 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4709 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 4710 | if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer)) |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4711 | mask |= (POLLIN | POLLRDNORM); |
| 4712 | |
| 4713 | if (dmxdev->dvr_output_events.wakeup_events_counter >= |
| 4714 | dmxdev->dvr_output_events.event_mask.wakeup_threshold) |
| 4715 | mask |= POLLPRI; |
| 4716 | } else { |
| 4717 | poll_wait(file, &dmxdev->dvr_input_buffer.queue, wait); |
| 4718 | if (dmxdev->dvr_input_buffer.error) |
| 4719 | mask |= (POLLOUT | POLLRDNORM | POLLPRI | POLLERR); |
| 4720 | |
| 4721 | if (dvb_ringbuffer_free(&dmxdev->dvr_input_buffer)) |
| 4722 | mask |= (POLLOUT | POLLRDNORM | POLLPRI); |
| 4723 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4724 | |
| 4725 | return mask; |
| 4726 | } |
| 4727 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 4728 | static const struct file_operations dvb_dvr_fops = { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4729 | .owner = THIS_MODULE, |
| 4730 | .read = dvb_dvr_read, |
| 4731 | .write = dvb_dvr_write, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4732 | .mmap = dvb_dvr_mmap, |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 4733 | .unlocked_ioctl = dvb_dvr_ioctl, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4734 | #ifdef CONFIG_COMPAT |
| 4735 | .compat_ioctl = dvb_dvr_compat_ioctl, |
| 4736 | #endif |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4737 | .open = dvb_dvr_open, |
| 4738 | .release = dvb_dvr_release, |
| 4739 | .poll = dvb_dvr_poll, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 4740 | .llseek = default_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4741 | }; |
| 4742 | |
Mauro Carvalho Chehab | 8afd52e | 2015-01-02 22:28:53 -0300 | [diff] [blame] | 4743 | static const struct dvb_device dvbdev_dvr = { |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4744 | .priv = NULL, |
Trent Piepho | 5e85bd0 | 2006-03-30 15:53:32 -0300 | [diff] [blame] | 4745 | .readers = 1, |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 4746 | .users = 1, |
Mauro Carvalho Chehab | 8afd52e | 2015-01-02 22:28:53 -0300 | [diff] [blame] | 4747 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
Mauro Carvalho Chehab | e4fd3bc | 2015-02-18 12:09:27 -0300 | [diff] [blame] | 4748 | .name = "dvb-dvr", |
Mauro Carvalho Chehab | 8afd52e | 2015-01-02 22:28:53 -0300 | [diff] [blame] | 4749 | #endif |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4750 | .fops = &dvb_dvr_fops |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4751 | }; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4752 | |
| 4753 | |
| 4754 | /** |
| 4755 | * debugfs service to print active filters information. |
| 4756 | */ |
| 4757 | static int dvb_dmxdev_dbgfs_print(struct seq_file *s, void *p) |
| 4758 | { |
| 4759 | int i; |
| 4760 | struct dmxdev *dmxdev = s->private; |
| 4761 | struct dmxdev_filter *filter; |
| 4762 | int active_count = 0; |
| 4763 | struct dmx_buffer_status buffer_status; |
| 4764 | struct dmx_scrambling_bits scrambling_bits; |
| 4765 | static const char * const pes_feeds[] = {"DEC", "PES", "DVR", "REC"}; |
| 4766 | int ret; |
| 4767 | |
| 4768 | if (!dmxdev) |
| 4769 | return 0; |
| 4770 | |
| 4771 | for (i = 0; i < dmxdev->filternum; i++) { |
| 4772 | filter = &dmxdev->filter[i]; |
| 4773 | if (filter->state >= DMXDEV_STATE_GO) { |
| 4774 | active_count++; |
| 4775 | |
| 4776 | seq_printf(s, "filter_%02d - ", i); |
| 4777 | |
| 4778 | if (filter->type == DMXDEV_TYPE_SEC) { |
| 4779 | seq_puts(s, "type: SEC, "); |
| 4780 | seq_printf(s, "PID %04d ", |
| 4781 | filter->params.sec.pid); |
| 4782 | scrambling_bits.pid = filter->params.sec.pid; |
| 4783 | } else { |
| 4784 | seq_printf(s, "type: %s, ", |
| 4785 | pes_feeds[filter->params.pes.output]); |
| 4786 | seq_printf(s, "PID: %04d ", |
| 4787 | filter->params.pes.pid); |
| 4788 | scrambling_bits.pid = filter->params.pes.pid; |
| 4789 | } |
| 4790 | |
| 4791 | dvb_dmxdev_get_scrambling_bits(filter, |
| 4792 | &scrambling_bits); |
| 4793 | |
| 4794 | if (filter->type == DMXDEV_TYPE_PES && |
| 4795 | filter->params.pes.output == DMX_OUT_TS_TAP) |
| 4796 | ret = dvb_dvr_get_buffer_status(dmxdev, |
| 4797 | O_RDONLY, &buffer_status); |
| 4798 | else |
| 4799 | ret = dvb_dmxdev_get_buffer_status(filter, |
| 4800 | &buffer_status); |
| 4801 | if (!ret) { |
| 4802 | seq_printf(s, "size: %08d, ", |
| 4803 | buffer_status.size); |
| 4804 | seq_printf(s, "fullness: %08d, ", |
| 4805 | buffer_status.fullness); |
| 4806 | seq_printf(s, "error: %d, ", |
| 4807 | buffer_status.error); |
| 4808 | } |
| 4809 | |
| 4810 | seq_printf(s, "scramble: %d, ", |
| 4811 | scrambling_bits.value); |
| 4812 | seq_printf(s, "secured: %d\n", |
| 4813 | filter->sec_mode.is_secured); |
| 4814 | } |
| 4815 | } |
| 4816 | |
| 4817 | if (!active_count) |
| 4818 | seq_puts(s, "No active filters\n"); |
| 4819 | |
| 4820 | return 0; |
| 4821 | } |
| 4822 | |
| 4823 | static int dvb_dmxdev_dbgfs_open(struct inode *inode, struct file *file) |
| 4824 | { |
| 4825 | return single_open(file, dvb_dmxdev_dbgfs_print, inode->i_private); |
| 4826 | } |
| 4827 | |
| 4828 | static const struct file_operations dbgfs_filters_fops = { |
| 4829 | .open = dvb_dmxdev_dbgfs_open, |
| 4830 | .read = seq_read, |
| 4831 | .llseek = seq_lseek, |
| 4832 | .release = single_release, |
| 4833 | .owner = THIS_MODULE, |
| 4834 | }; |
| 4835 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4836 | int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4837 | { |
| 4838 | int i; |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4839 | struct dmx_caps caps; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4840 | |
| 4841 | if (dmxdev->demux->open(dmxdev->demux) < 0) |
| 4842 | return -EUSERS; |
| 4843 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4844 | dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4845 | if (!dmxdev->filter) |
| 4846 | return -ENOMEM; |
| 4847 | |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4848 | dmxdev->playback_mode = DMX_PB_MODE_PUSH; |
| 4849 | dmxdev->demux->dvr_input_protected = 0; |
| 4850 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 4851 | mutex_init(&dmxdev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4852 | spin_lock_init(&dmxdev->lock); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4853 | spin_lock_init(&dmxdev->dvr_in_lock); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4854 | for (i = 0; i < dmxdev->filternum; i++) { |
| 4855 | dmxdev->filter[i].dev = dmxdev; |
| 4856 | dmxdev->filter[i].buffer.data = NULL; |
| 4857 | dvb_dmxdev_filter_state_set(&dmxdev->filter[i], |
| 4858 | DMXDEV_STATE_FREE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4859 | } |
| 4860 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4861 | dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4862 | DVB_DEVICE_DEMUX, 0); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4863 | dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr, |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4864 | dmxdev, DVB_DEVICE_DVR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4865 | |
Andreas Oberritter | 34731df | 2006-03-14 17:31:01 -0300 | [diff] [blame] | 4866 | dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192); |
Udaya Bhaskara Reddy Mallavarapu | ba29a3e8 | 2017-06-12 14:57:05 +0530 | [diff] [blame] | 4867 | dvb_ringbuffer_init(&dmxdev->dvr_input_buffer, NULL, 8192); |
| 4868 | |
| 4869 | /* Disable auto buffer flushing if plugin does not allow it */ |
| 4870 | if (dmxdev->demux->get_caps) { |
| 4871 | dmxdev->demux->get_caps(dmxdev->demux, &caps); |
| 4872 | if (!(caps.caps & DMX_CAP_AUTO_BUFFER_FLUSH)) |
| 4873 | overflow_auto_flush = 0; |
| 4874 | } |
| 4875 | |
| 4876 | if (dmxdev->demux->debugfs_demux_dir) |
| 4877 | debugfs_create_file("filters", 0444, |
| 4878 | dmxdev->demux->debugfs_demux_dir, dmxdev, |
| 4879 | &dbgfs_filters_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4880 | |
| 4881 | return 0; |
| 4882 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4883 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4884 | EXPORT_SYMBOL(dvb_dmxdev_init); |
| 4885 | |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4886 | void dvb_dmxdev_release(struct dmxdev *dmxdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4887 | { |
Markus Rechberger | 57861b4 | 2007-04-14 10:19:18 -0300 | [diff] [blame] | 4888 | dmxdev->exit=1; |
| 4889 | if (dmxdev->dvbdev->users > 1) { |
| 4890 | wait_event(dmxdev->dvbdev->wait_queue, |
| 4891 | dmxdev->dvbdev->users==1); |
| 4892 | } |
| 4893 | if (dmxdev->dvr_dvbdev->users > 1) { |
| 4894 | wait_event(dmxdev->dvr_dvbdev->wait_queue, |
| 4895 | dmxdev->dvr_dvbdev->users==1); |
| 4896 | } |
| 4897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4898 | dvb_unregister_device(dmxdev->dvbdev); |
| 4899 | dvb_unregister_device(dmxdev->dvr_dvbdev); |
| 4900 | |
| 4901 | vfree(dmxdev->filter); |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4902 | dmxdev->filter = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4903 | dmxdev->demux->close(dmxdev->demux); |
| 4904 | } |
Andreas Oberritter | f705e6e | 2006-03-10 15:22:31 -0300 | [diff] [blame] | 4905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4906 | EXPORT_SYMBOL(dvb_dmxdev_release); |