1 /* $NetBSD: video.c,v 1.23 2009/12/06 22:42:48 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Patrick Mahoney <pat@polycrystal.org> 5 * All rights reserved. 6 * 7 * This code was written by Patrick Mahoney (pat@polycrystal.org) as 8 * part of Google Summer of Code 2008. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * This ia a Video4Linux 2 compatible /dev/video driver for NetBSD 34 * 35 * See http://v4l2spec.bytesex.org/ for Video4Linux 2 specifications 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: video.c,v 1.23 2009/12/06 22:42:48 dyoung Exp $"); 40 41 #include "video.h" 42 #if NVIDEO > 0 43 44 #include <sys/param.h> 45 #include <sys/ioctl.h> 46 #include <sys/fcntl.h> 47 #include <sys/vnode.h> 48 #include <sys/poll.h> 49 #include <sys/select.h> 50 #include <sys/kmem.h> 51 #include <sys/pool.h> 52 #include <sys/conf.h> 53 #include <sys/types.h> 54 #include <sys/device.h> 55 #include <sys/condvar.h> 56 #include <sys/queue.h> 57 #include <sys/videoio.h> 58 59 #include <dev/video_if.h> 60 61 /* #define VIDEO_DEBUG 1 */ 62 63 #ifdef VIDEO_DEBUG 64 #define DPRINTF(x) do { if (videodebug) printf x; } while (0) 65 #define DPRINTFN(n,x) do { if (videodebug>(n)) printf x; } while (0) 66 int videodebug = VIDEO_DEBUG; 67 #else 68 #define DPRINTF(x) 69 #define DPRINTFN(n,x) 70 #endif 71 72 #define PAGE_ALIGN(a) (((a) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1)) 73 74 #define VIDEO_DRIVER_VERSION 1 75 76 /* TODO: move to sys/intr.h */ 77 #define IPL_VIDEO IPL_VM 78 #define splvideo() splvm() 79 80 #define VIDEO_MIN_BUFS 2 81 #define VIDEO_MAX_BUFS 32 82 #define VIDEO_NUM_BUFS 4 83 84 /* Scatter Buffer - an array of fixed size (PAGE_SIZE) chunks 85 * allocated non-contiguously and functions to get data into and out 86 * of the scatter buffer. */ 87 struct scatter_buf { 88 pool_cache_t sb_pool; 89 size_t sb_size; /* size in bytes */ 90 size_t sb_npages; /* number of pages */ 91 uint8_t **sb_page_ary; /* array of page pointers */ 92 }; 93 94 struct scatter_io { 95 struct scatter_buf *sio_buf; 96 off_t sio_offset; 97 size_t sio_resid; 98 }; 99 100 static void scatter_buf_init(struct scatter_buf *); 101 static void scatter_buf_destroy(struct scatter_buf *); 102 static int scatter_buf_set_size(struct scatter_buf *, size_t); 103 static paddr_t scatter_buf_map(struct scatter_buf *, off_t); 104 105 static bool scatter_io_init(struct scatter_buf *, off_t, size_t, struct scatter_io *); 106 static bool scatter_io_next(struct scatter_io *, void **, size_t *); 107 static void scatter_io_undo(struct scatter_io *, size_t); 108 static void scatter_io_copyin(struct scatter_io *, const void *); 109 /* static void scatter_io_copyout(struct scatter_io *, void *); */ 110 static int scatter_io_uiomove(struct scatter_io *, struct uio *); 111 112 113 enum video_stream_method { 114 VIDEO_STREAM_METHOD_NONE, 115 VIDEO_STREAM_METHOD_READ, 116 VIDEO_STREAM_METHOD_MMAP, 117 VIDEO_STREAM_METHOD_USERPTR 118 }; 119 120 struct video_buffer { 121 struct v4l2_buffer *vb_buf; 122 SIMPLEQ_ENTRY(video_buffer) entries; 123 }; 124 125 SIMPLEQ_HEAD(sample_queue, video_buffer); 126 127 struct video_stream { 128 int vs_flags; /* flags given to open() */ 129 130 struct video_format vs_format; 131 132 int vs_frameno; /* toggles between 0 and 1, 133 * or -1 if new */ 134 uint32_t vs_sequence; /* absoulte frame/sample number in 135 * sequence, wraps around */ 136 bool vs_drop; /* drop payloads from current 137 * frameno? */ 138 139 enum v4l2_buf_type vs_type; 140 uint8_t vs_nbufs; 141 struct video_buffer **vs_buf; 142 143 struct scatter_buf vs_data; /* stores video data for MMAP 144 * and READ */ 145 146 /* Video samples may exist in different locations. Initially, 147 * samples are queued into the ingress queue. The driver 148 * grabs these in turn and fills them with video data. Once 149 * filled, they are moved to the egress queue. Samples are 150 * dequeued either by user with MMAP method or, with READ 151 * method, videoread() works from the fist sample in the 152 * ingress queue without dequeing. In the first case, the 153 * user re-queues the buffer when finished, and videoread() 154 * does the same when all data has been read. The sample now 155 * returns to the ingress queue. */ 156 struct sample_queue vs_ingress; /* samples under driver control */ 157 struct sample_queue vs_egress; /* samples headed for userspace */ 158 159 bool vs_streaming; 160 enum video_stream_method vs_method; /* method by which 161 * userspace will read 162 * samples */ 163 164 kmutex_t vs_lock; /* Lock to manipulate queues. 165 * Should also be held when 166 * changing number of 167 * buffers. */ 168 kcondvar_t vs_sample_cv; /* signaled on new 169 * ingress sample */ 170 struct selinfo vs_sel; 171 172 uint32_t vs_bytesread; /* bytes read() from current 173 * sample thus far */ 174 }; 175 176 struct video_softc { 177 device_t sc_dev; 178 device_t hw_dev; /* Hardware (parent) device */ 179 void * hw_softc; /* Hardware device private softc */ 180 const struct video_hw_if *hw_if; /* Hardware interface */ 181 182 u_int sc_open; 183 int sc_refcnt; 184 int sc_opencnt; 185 bool sc_dying; 186 187 struct video_stream sc_stream_in; 188 }; 189 static int video_print(void *, const char *); 190 191 static int video_match(device_t, cfdata_t, void *); 192 static void video_attach(device_t, device_t, void *); 193 static int video_detach(device_t, int); 194 static int video_activate(device_t, enum devact); 195 196 dev_type_open(videoopen); 197 dev_type_close(videoclose); 198 dev_type_read(videoread); 199 dev_type_write(videowrite); 200 dev_type_ioctl(videoioctl); 201 dev_type_poll(videopoll); 202 dev_type_mmap(videommap); 203 204 const struct cdevsw video_cdevsw = { 205 videoopen, videoclose, videoread, videowrite, videoioctl, 206 nostop, notty, videopoll, videommap, nokqfilter, D_OTHER 207 }; 208 209 #define VIDEOUNIT(n) (minor(n)) 210 211 CFATTACH_DECL_NEW(video, sizeof(struct video_softc), 212 video_match, video_attach, video_detach, video_activate); 213 214 extern struct cfdriver video_cd; 215 216 static const char * video_pixel_format_str(enum video_pixel_format); 217 218 /* convert various values from V4L2 to native values of this driver */ 219 static uint16_t v4l2id_to_control_id(uint32_t); 220 static uint32_t control_flags_to_v4l2flags(uint32_t); 221 static enum v4l2_ctrl_type control_type_to_v4l2type(enum video_control_type); 222 223 static void v4l2_format_to_video_format(const struct v4l2_format *, 224 struct video_format *); 225 static void video_format_to_v4l2_format(const struct video_format *, 226 struct v4l2_format *); 227 228 /* V4L2 api functions, typically called from videoioclt() */ 229 static int video_enum_format(struct video_softc *, struct v4l2_fmtdesc *); 230 static int video_get_format(struct video_softc *, 231 struct v4l2_format *); 232 static int video_set_format(struct video_softc *, 233 struct v4l2_format *); 234 static int video_try_format(struct video_softc *, 235 struct v4l2_format *); 236 static int video_query_control(struct video_softc *, 237 struct v4l2_queryctrl *); 238 static int video_get_control(struct video_softc *, 239 struct v4l2_control *); 240 static int video_set_control(struct video_softc *, 241 const struct v4l2_control *); 242 static int video_request_bufs(struct video_softc *, 243 struct v4l2_requestbuffers *); 244 static int video_query_buf(struct video_softc *, struct v4l2_buffer *); 245 static int video_queue_buf(struct video_softc *, struct v4l2_buffer *); 246 static int video_dequeue_buf(struct video_softc *, struct v4l2_buffer *); 247 static int video_stream_on(struct video_softc *, enum v4l2_buf_type); 248 static int video_stream_off(struct video_softc *, enum v4l2_buf_type); 249 250 static struct video_buffer * video_buffer_alloc(void); 251 static void video_buffer_free(struct video_buffer *); 252 253 254 /* functions for video_stream */ 255 static void video_stream_init(struct video_stream *); 256 static void video_stream_fini(struct video_stream *); 257 258 static int video_stream_setup_bufs(struct video_stream *, 259 enum video_stream_method, 260 uint8_t); 261 static void video_stream_teardown_bufs(struct video_stream *); 262 263 static int video_stream_realloc_bufs(struct video_stream *, uint8_t); 264 #define video_stream_free_bufs(vs) \ 265 video_stream_realloc_bufs((vs), 0) 266 267 static void video_stream_enqueue(struct video_stream *, 268 struct video_buffer *); 269 static struct video_buffer * video_stream_dequeue(struct video_stream *); 270 static void video_stream_write(struct video_stream *, 271 const struct video_payload *); 272 static void video_stream_sample_done(struct video_stream *); 273 274 #ifdef VIDEO_DEBUG 275 /* debugging */ 276 static const char * video_ioctl_str(u_long); 277 #endif 278 279 280 static int 281 video_match(device_t parent, cfdata_t match, void *aux) 282 { 283 struct video_attach_args *args; 284 285 args = aux; 286 DPRINTF(("video_match: hw=%p\n", args->hw_if)); 287 return 1; 288 } 289 290 291 static void 292 video_attach(device_t parent, device_t self, void *aux) 293 { 294 struct video_softc *sc; 295 struct video_attach_args *args; 296 297 sc = device_private(self); 298 args = aux; 299 300 sc->sc_dev = self; 301 sc->hw_dev = parent; 302 sc->hw_if = args->hw_if; 303 sc->hw_softc = device_private(parent); 304 305 sc->sc_open = 0; 306 sc->sc_refcnt = 0; 307 sc->sc_opencnt = 0; 308 sc->sc_dying = false; 309 310 video_stream_init(&sc->sc_stream_in); 311 312 aprint_naive("\n"); 313 aprint_normal(": %s\n", sc->hw_if->get_devname(sc->hw_softc)); 314 315 DPRINTF(("video_attach: sc=%p hwif=%p\n", sc, sc->hw_if)); 316 317 if (!pmf_device_register(self, NULL, NULL)) 318 aprint_error_dev(self, "couldn't establish power handler\n"); 319 } 320 321 322 static int 323 video_activate(device_t self, enum devact act) 324 { 325 struct video_softc *sc = device_private(self); 326 327 DPRINTF(("video_activate: sc=%p\n", sc)); 328 switch (act) { 329 case DVACT_DEACTIVATE: 330 sc->sc_dying = true; 331 return 0; 332 default: 333 return EOPNOTSUPP; 334 } 335 } 336 337 338 static int 339 video_detach(device_t self, int flags) 340 { 341 struct video_softc *sc; 342 int maj, mn; 343 344 sc = device_private(self); 345 DPRINTF(("video_detach: sc=%p flags=%d\n", sc, flags)); 346 347 sc->sc_dying = true; 348 349 pmf_device_deregister(self); 350 351 maj = cdevsw_lookup_major(&video_cdevsw); 352 mn = device_unit(self); 353 /* close open instances */ 354 vdevgone(maj, mn, mn, VCHR); 355 356 video_stream_fini(&sc->sc_stream_in); 357 358 return 0; 359 } 360 361 362 static int 363 video_print(void *aux, const char *pnp) 364 { 365 struct video_attach_args *arg; 366 367 if (pnp != NULL) { 368 DPRINTF(("video_print: have pnp\n")); 369 arg = aux; 370 aprint_normal("%s at %s\n", "video", pnp); 371 } else { 372 DPRINTF(("video_print: pnp is NULL\n")); 373 } 374 return UNCONF; 375 } 376 377 378 /* 379 * Called from hardware driver. This is where the MI audio driver 380 * gets probed/attached to the hardware driver. 381 */ 382 device_t 383 video_attach_mi(const struct video_hw_if *hw_if, device_t parent) 384 { 385 struct video_attach_args args; 386 387 args.hw_if = hw_if; 388 return config_found_ia(parent, "videobus", &args, video_print); 389 } 390 391 /* video_submit_payload - called by hardware driver to submit payload data */ 392 void 393 video_submit_payload(device_t self, const struct video_payload *payload) 394 { 395 struct video_softc *sc; 396 397 sc = device_private(self); 398 399 if (sc == NULL) 400 return; 401 402 video_stream_write(&sc->sc_stream_in, payload); 403 } 404 405 static const char * 406 video_pixel_format_str(enum video_pixel_format px) 407 { 408 switch (px) { 409 case VIDEO_FORMAT_UYVY: return "UYVY"; 410 case VIDEO_FORMAT_YUV420: return "YUV420"; 411 case VIDEO_FORMAT_YUY2: return "YUYV"; 412 case VIDEO_FORMAT_NV12: return "NV12"; 413 case VIDEO_FORMAT_RGB24: return "RGB24"; 414 case VIDEO_FORMAT_RGB555: return "RGB555"; 415 case VIDEO_FORMAT_RGB565: return "RGB565"; 416 case VIDEO_FORMAT_SBGGR8: return "SBGGR8"; 417 case VIDEO_FORMAT_MJPEG: return "MJPEG"; 418 case VIDEO_FORMAT_DV: return "DV"; 419 case VIDEO_FORMAT_MPEG: return "MPEG"; 420 default: return "Unknown"; 421 } 422 } 423 424 /* Takes a V4L2 id and returns a "native" video driver control id. 425 * TODO: is there a better way to do this? some kind of array? */ 426 static uint16_t 427 v4l2id_to_control_id(uint32_t v4l2id) 428 { 429 /* mask includes class bits and control id bits */ 430 switch (v4l2id & 0xffffff) { 431 case V4L2_CID_BRIGHTNESS: return VIDEO_CONTROL_BRIGHTNESS; 432 case V4L2_CID_CONTRAST: return VIDEO_CONTROL_CONTRAST; 433 case V4L2_CID_SATURATION: return VIDEO_CONTROL_SATURATION; 434 case V4L2_CID_HUE: return VIDEO_CONTROL_HUE; 435 case V4L2_CID_HUE_AUTO: return VIDEO_CONTROL_HUE_AUTO; 436 case V4L2_CID_SHARPNESS: return VIDEO_CONTROL_SHARPNESS; 437 case V4L2_CID_GAMMA: return VIDEO_CONTROL_GAMMA; 438 439 /* "black level" means the same as "brightness", but V4L2 440 * defines two separate controls that are not identical. 441 * V4L2_CID_BLACK_LEVEL is deprecated however in V4L2. */ 442 case V4L2_CID_BLACK_LEVEL: return VIDEO_CONTROL_BRIGHTNESS; 443 444 case V4L2_CID_AUDIO_VOLUME: return VIDEO_CONTROL_UNDEFINED; 445 case V4L2_CID_AUDIO_BALANCE: return VIDEO_CONTROL_UNDEFINED; 446 case V4L2_CID_AUDIO_BASS: return VIDEO_CONTROL_UNDEFINED; 447 case V4L2_CID_AUDIO_TREBLE: return VIDEO_CONTROL_UNDEFINED; 448 case V4L2_CID_AUDIO_MUTE: return VIDEO_CONTROL_UNDEFINED; 449 case V4L2_CID_AUDIO_LOUDNESS: return VIDEO_CONTROL_UNDEFINED; 450 451 case V4L2_CID_AUTO_WHITE_BALANCE: 452 return VIDEO_CONTROL_WHITE_BALANCE_AUTO; 453 case V4L2_CID_DO_WHITE_BALANCE: 454 return VIDEO_CONTROL_WHITE_BALANCE_ACTION; 455 case V4L2_CID_RED_BALANCE: 456 case V4L2_CID_BLUE_BALANCE: 457 /* This might not fit in with the control_id/value_id scheme */ 458 return VIDEO_CONTROL_WHITE_BALANCE_COMPONENT; 459 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: 460 return VIDEO_CONTROL_WHITE_BALANCE_TEMPERATURE; 461 case V4L2_CID_EXPOSURE: 462 return VIDEO_CONTROL_EXPOSURE_TIME_ABSOLUTE; 463 case V4L2_CID_GAIN: return VIDEO_CONTROL_GAIN; 464 case V4L2_CID_AUTOGAIN: return VIDEO_CONTROL_GAIN_AUTO; 465 case V4L2_CID_HFLIP: return VIDEO_CONTROL_HFLIP; 466 case V4L2_CID_VFLIP: return VIDEO_CONTROL_VFLIP; 467 case V4L2_CID_HCENTER_DEPRECATED: 468 case V4L2_CID_VCENTER_DEPRECATED: 469 return VIDEO_CONTROL_UNDEFINED; 470 case V4L2_CID_POWER_LINE_FREQUENCY: 471 return VIDEO_CONTROL_POWER_LINE_FREQUENCY; 472 case V4L2_CID_BACKLIGHT_COMPENSATION: 473 return VIDEO_CONTROL_BACKLIGHT_COMPENSATION; 474 default: return V4L2_CTRL_ID2CID(v4l2id); 475 } 476 } 477 478 479 static uint32_t 480 control_flags_to_v4l2flags(uint32_t flags) 481 { 482 uint32_t v4l2flags = 0; 483 484 if (flags & VIDEO_CONTROL_FLAG_DISABLED) 485 v4l2flags |= V4L2_CTRL_FLAG_INACTIVE; 486 487 if (!(flags & VIDEO_CONTROL_FLAG_WRITE)) 488 v4l2flags |= V4L2_CTRL_FLAG_READ_ONLY; 489 490 if (flags & VIDEO_CONTROL_FLAG_AUTOUPDATE) 491 v4l2flags |= V4L2_CTRL_FLAG_GRABBED; 492 493 return v4l2flags; 494 } 495 496 497 static enum v4l2_ctrl_type 498 control_type_to_v4l2type(enum video_control_type type) { 499 switch (type) { 500 case VIDEO_CONTROL_TYPE_INT: return V4L2_CTRL_TYPE_INTEGER; 501 case VIDEO_CONTROL_TYPE_BOOL: return V4L2_CTRL_TYPE_BOOLEAN; 502 case VIDEO_CONTROL_TYPE_LIST: return V4L2_CTRL_TYPE_MENU; 503 case VIDEO_CONTROL_TYPE_ACTION: return V4L2_CTRL_TYPE_BUTTON; 504 default: return V4L2_CTRL_TYPE_INTEGER; /* err? */ 505 } 506 } 507 508 509 static int 510 video_query_control(struct video_softc *sc, 511 struct v4l2_queryctrl *query) 512 { 513 const struct video_hw_if *hw; 514 struct video_control_desc_group desc_group; 515 struct video_control_desc desc; 516 int err; 517 518 hw = sc->hw_if; 519 if (hw->get_control_desc_group) { 520 desc.group_id = desc.control_id = 521 v4l2id_to_control_id(query->id); 522 523 desc_group.group_id = desc.group_id; 524 desc_group.length = 1; 525 desc_group.desc = &desc; 526 527 err = hw->get_control_desc_group(sc->hw_softc, &desc_group); 528 if (err != 0) 529 return err; 530 531 query->type = control_type_to_v4l2type(desc.type); 532 memcpy(query->name, desc.name, 32); 533 query->minimum = desc.min; 534 query->maximum = desc.max; 535 query->step = desc.step; 536 query->default_value = desc.def; 537 query->flags = control_flags_to_v4l2flags(desc.flags); 538 539 return 0; 540 } else { 541 return EINVAL; 542 } 543 } 544 545 546 /* Takes a single Video4Linux2 control and queries the driver for the 547 * current value. */ 548 static int 549 video_get_control(struct video_softc *sc, 550 struct v4l2_control *vcontrol) 551 { 552 const struct video_hw_if *hw; 553 struct video_control_group group; 554 struct video_control control; 555 int err; 556 557 hw = sc->hw_if; 558 if (hw->get_control_group) { 559 control.group_id = control.control_id = 560 v4l2id_to_control_id(vcontrol->id); 561 /* ?? if "control_id" is arbitrarily defined by the 562 * driver, then we need some way to store it... Maybe 563 * it doesn't matter for single value controls. */ 564 control.value = 0; 565 566 group.group_id = control.group_id; 567 group.length = 1; 568 group.control = &control; 569 570 err = hw->get_control_group(sc->hw_softc, &group); 571 if (err != 0) 572 return err; 573 574 vcontrol->value = control.value; 575 return 0; 576 } else { 577 return EINVAL; 578 } 579 } 580 581 static void 582 video_format_to_v4l2_format(const struct video_format *src, 583 struct v4l2_format *dest) 584 { 585 /* TODO: what about win and vbi formats? */ 586 dest->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 587 dest->fmt.pix.width = src->width; 588 dest->fmt.pix.height = src->height; 589 dest->fmt.pix.field = V4L2_FIELD_NONE; /* TODO: for now, 590 * just set to 591 * progressive */ 592 dest->fmt.pix.bytesperline = src->stride; 593 dest->fmt.pix.sizeimage = src->sample_size; 594 dest->fmt.pix.colorspace = 0; /* XXX */ 595 dest->fmt.pix.priv = src->priv; 596 597 switch (src->pixel_format) { 598 case VIDEO_FORMAT_UYVY: 599 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 600 break; 601 case VIDEO_FORMAT_YUV420: 602 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 603 break; 604 case VIDEO_FORMAT_YUY2: 605 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; 606 break; 607 case VIDEO_FORMAT_NV12: 608 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_NV12; 609 break; 610 case VIDEO_FORMAT_RGB24: 611 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24; 612 break; 613 case VIDEO_FORMAT_RGB555: 614 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_RGB555; 615 break; 616 case VIDEO_FORMAT_RGB565: 617 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_RGB565; 618 break; 619 case VIDEO_FORMAT_SBGGR8: 620 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8; 621 break; 622 case VIDEO_FORMAT_MJPEG: 623 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG; 624 break; 625 case VIDEO_FORMAT_DV: 626 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_DV; 627 break; 628 case VIDEO_FORMAT_MPEG: 629 dest->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 630 break; 631 case VIDEO_FORMAT_UNDEFINED: 632 default: 633 DPRINTF(("video_get_format: unknown pixel format %d\n", 634 src->pixel_format)); 635 dest->fmt.pix.pixelformat = 0; /* V4L2 doesn't define 636 * and "undefined" 637 * format? */ 638 break; 639 } 640 641 } 642 643 static void 644 v4l2_format_to_video_format(const struct v4l2_format *src, 645 struct video_format *dest) 646 { 647 switch (src->type) { 648 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 649 dest->width = src->fmt.pix.width; 650 dest->height = src->fmt.pix.height; 651 652 dest->stride = src->fmt.pix.bytesperline; 653 dest->sample_size = src->fmt.pix.sizeimage; 654 655 switch (src->fmt.pix.pixelformat) { 656 case V4L2_PIX_FMT_UYVY: 657 dest->pixel_format = VIDEO_FORMAT_UYVY; 658 break; 659 case V4L2_PIX_FMT_YUV420: 660 dest->pixel_format = VIDEO_FORMAT_YUV420; 661 break; 662 case V4L2_PIX_FMT_YUYV: 663 dest->pixel_format = VIDEO_FORMAT_YUY2; 664 break; 665 case V4L2_PIX_FMT_NV12: 666 dest->pixel_format = VIDEO_FORMAT_NV12; 667 break; 668 case V4L2_PIX_FMT_RGB24: 669 dest->pixel_format = VIDEO_FORMAT_RGB24; 670 break; 671 case V4L2_PIX_FMT_RGB555: 672 dest->pixel_format = VIDEO_FORMAT_RGB555; 673 break; 674 case V4L2_PIX_FMT_RGB565: 675 dest->pixel_format = VIDEO_FORMAT_RGB565; 676 break; 677 case V4L2_PIX_FMT_SBGGR8: 678 dest->pixel_format = VIDEO_FORMAT_SBGGR8; 679 break; 680 case V4L2_PIX_FMT_MJPEG: 681 dest->pixel_format = VIDEO_FORMAT_MJPEG; 682 break; 683 case V4L2_PIX_FMT_DV: 684 dest->pixel_format = VIDEO_FORMAT_DV; 685 break; 686 case V4L2_PIX_FMT_MPEG: 687 dest->pixel_format = VIDEO_FORMAT_MPEG; 688 break; 689 default: 690 DPRINTF(("video: unknown v4l2 pixel format %d\n", 691 src->fmt.pix.pixelformat)); 692 dest->pixel_format = VIDEO_FORMAT_UNDEFINED; 693 break; 694 } 695 break; 696 default: 697 /* TODO: other v4l2 format types */ 698 DPRINTF(("video: unsupported v4l2 format type %d\n", 699 src->type)); 700 break; 701 } 702 } 703 704 static int 705 video_enum_format(struct video_softc *sc, struct v4l2_fmtdesc *fmtdesc) 706 { 707 const struct video_hw_if *hw; 708 struct video_format vfmt; 709 struct v4l2_format fmt; 710 int err; 711 712 hw = sc->hw_if; 713 if (hw->enum_format == NULL) 714 return ENOTTY; 715 716 err = hw->enum_format(sc->hw_softc, fmtdesc->index, &vfmt); 717 if (err != 0) 718 return err; 719 720 video_format_to_v4l2_format(&vfmt, &fmt); 721 722 fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; /* TODO: only one type for now */ 723 if (vfmt.pixel_format >= VIDEO_FORMAT_MJPEG) 724 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; 725 strlcpy(fmtdesc->description, 726 video_pixel_format_str(vfmt.pixel_format), 727 sizeof(fmtdesc->description)); 728 fmtdesc->pixelformat = fmt.fmt.pix.pixelformat; 729 730 return 0; 731 } 732 733 static int 734 video_get_format(struct video_softc *sc, 735 struct v4l2_format *format) 736 { 737 const struct video_hw_if *hw; 738 struct video_format vfmt; 739 int err; 740 741 hw = sc->hw_if; 742 if (hw->get_format == NULL) 743 return ENOTTY; 744 745 err = hw->get_format(sc->hw_softc, &vfmt); 746 if (err != 0) 747 return err; 748 749 video_format_to_v4l2_format(&vfmt, format); 750 751 return 0; 752 } 753 754 static int 755 video_set_format(struct video_softc *sc, struct v4l2_format *fmt) 756 { 757 const struct video_hw_if *hw; 758 struct video_format vfmt; 759 int err; 760 761 hw = sc->hw_if; 762 if (hw->set_format == NULL) 763 return ENOTTY; 764 765 v4l2_format_to_video_format(fmt, &vfmt); 766 767 err = hw->set_format(sc->hw_softc, &vfmt); 768 if (err != 0) 769 return err; 770 771 video_format_to_v4l2_format(&vfmt, fmt); 772 sc->sc_stream_in.vs_format = vfmt; 773 774 return 0; 775 } 776 777 778 static int 779 video_try_format(struct video_softc *sc, 780 struct v4l2_format *format) 781 { 782 const struct video_hw_if *hw; 783 struct video_format vfmt; 784 int err; 785 786 hw = sc->hw_if; 787 if (hw->try_format == NULL) 788 return ENOTTY; 789 790 v4l2_format_to_video_format(format, &vfmt); 791 792 err = hw->try_format(sc->hw_softc, &vfmt); 793 if (err != 0) 794 return err; 795 796 video_format_to_v4l2_format(&vfmt, format); 797 798 return 0; 799 } 800 801 /* Takes a single Video4Linux2 control, converts it to a struct 802 * video_control, and calls the hardware driver. */ 803 static int 804 video_set_control(struct video_softc *sc, 805 const struct v4l2_control *vcontrol) 806 { 807 const struct video_hw_if *hw; 808 struct video_control_group group; 809 struct video_control control; 810 811 hw = sc->hw_if; 812 if (hw->set_control_group) { 813 control.group_id = control.control_id = 814 v4l2id_to_control_id(vcontrol->id); 815 /* ?? if "control_id" is arbitrarily defined by the 816 * driver, then we need some way to store it... Maybe 817 * it doesn't matter for single value controls. */ 818 control.value = vcontrol->value; 819 820 group.group_id = control.group_id; 821 group.length = 1; 822 group.control = &control; 823 824 return (hw->set_control_group(sc->hw_softc, &group)); 825 } else { 826 return EINVAL; 827 } 828 } 829 830 static int 831 video_request_bufs(struct video_softc *sc, 832 struct v4l2_requestbuffers *req) 833 { 834 struct video_stream *vs = &sc->sc_stream_in; 835 struct v4l2_buffer *buf; 836 int i, err; 837 838 if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 839 return EINVAL; 840 841 vs->vs_type = req->type; 842 843 switch (req->memory) { 844 case V4L2_MEMORY_MMAP: 845 if (req->count < VIDEO_MIN_BUFS) 846 req->count = VIDEO_MIN_BUFS; 847 else if (req->count > VIDEO_MAX_BUFS) 848 req->count = VIDEO_MAX_BUFS; 849 850 err = video_stream_setup_bufs(vs, 851 VIDEO_STREAM_METHOD_MMAP, 852 req->count); 853 if (err != 0) 854 return err; 855 856 for (i = 0; i < req->count; ++i) { 857 buf = vs->vs_buf[i]->vb_buf; 858 buf->memory = V4L2_MEMORY_MMAP; 859 buf->flags |= V4L2_BUF_FLAG_MAPPED; 860 } 861 break; 862 case V4L2_MEMORY_USERPTR: 863 default: 864 return EINVAL; 865 } 866 867 return 0; 868 } 869 870 static int 871 video_query_buf(struct video_softc *sc, 872 struct v4l2_buffer *buf) 873 { 874 struct video_stream *vs = &sc->sc_stream_in; 875 876 if (buf->type != vs->vs_type) 877 return EINVAL; 878 if (buf->index >= vs->vs_nbufs) 879 return EINVAL; 880 881 memcpy(buf, vs->vs_buf[buf->index]->vb_buf, sizeof(*buf)); 882 883 return 0; 884 } 885 886 /* Accept a buffer descriptor from userspace and return the indicated 887 * buffer to the driver's queue. */ 888 static int 889 video_queue_buf(struct video_softc *sc, struct v4l2_buffer *userbuf) 890 { 891 struct video_stream *vs = &sc->sc_stream_in; 892 struct video_buffer *vb; 893 struct v4l2_buffer *driverbuf; 894 895 if (userbuf->type != vs->vs_type) { 896 DPRINTF(("video_queue_buf: expected type=%d got type=%d\n", 897 userbuf->type, vs->vs_type)); 898 return EINVAL; 899 } 900 if (userbuf->index >= vs->vs_nbufs) { 901 DPRINTF(("video_queue_buf: invalid index %d >= %d\n", 902 userbuf->index, vs->vs_nbufs)); 903 return EINVAL; 904 } 905 906 switch (vs->vs_method) { 907 case VIDEO_STREAM_METHOD_MMAP: 908 if (userbuf->memory != V4L2_MEMORY_MMAP) { 909 DPRINTF(("video_queue_buf: invalid memory=%d\n", 910 userbuf->memory)); 911 return EINVAL; 912 } 913 914 mutex_enter(&vs->vs_lock); 915 916 vb = vs->vs_buf[userbuf->index]; 917 driverbuf = vb->vb_buf; 918 if (driverbuf->flags & V4L2_BUF_FLAG_QUEUED) { 919 DPRINTF(("video_queue_buf: buf already queued; " 920 "flags=0x%x\n", driverbuf->flags)); 921 mutex_exit(&vs->vs_lock); 922 return EINVAL; 923 } 924 video_stream_enqueue(vs, vb); 925 memcpy(userbuf, driverbuf, sizeof(*driverbuf)); 926 927 mutex_exit(&vs->vs_lock); 928 break; 929 default: 930 return EINVAL; 931 } 932 933 return 0; 934 } 935 936 /* Dequeue the described buffer from the driver queue, making it 937 * available for reading via mmap. */ 938 static int 939 video_dequeue_buf(struct video_softc *sc, struct v4l2_buffer *buf) 940 { 941 struct video_stream *vs = &sc->sc_stream_in; 942 struct video_buffer *vb; 943 int err; 944 945 if (buf->type != vs->vs_type) { 946 aprint_debug_dev(sc->sc_dev, 947 "requested type %d (expected %d)\n", 948 buf->type, vs->vs_type); 949 return EINVAL; 950 } 951 952 switch (vs->vs_method) { 953 case VIDEO_STREAM_METHOD_MMAP: 954 if (buf->memory != V4L2_MEMORY_MMAP) { 955 aprint_debug_dev(sc->sc_dev, 956 "requested memory %d (expected %d)\n", 957 buf->memory, V4L2_MEMORY_MMAP); 958 return EINVAL; 959 } 960 961 mutex_enter(&vs->vs_lock); 962 963 if (vs->vs_flags & O_NONBLOCK) { 964 vb = video_stream_dequeue(vs); 965 if (vb == NULL) { 966 mutex_exit(&vs->vs_lock); 967 return EAGAIN; 968 } 969 } else { 970 /* Block until we have sample */ 971 while ((vb = video_stream_dequeue(vs)) == NULL) { 972 if (!vs->vs_streaming) { 973 mutex_exit(&vs->vs_lock); 974 return EINVAL; 975 } 976 err = cv_wait_sig(&vs->vs_sample_cv, 977 &vs->vs_lock); 978 if (err != 0) { 979 mutex_exit(&vs->vs_lock); 980 return EINTR; 981 } 982 } 983 } 984 985 memcpy(buf, vb->vb_buf, sizeof(*buf)); 986 987 mutex_exit(&vs->vs_lock); 988 break; 989 default: 990 aprint_debug_dev(sc->sc_dev, "unknown vs_method %d\n", 991 vs->vs_method); 992 return EINVAL; 993 } 994 995 return 0; 996 } 997 998 static int 999 video_stream_on(struct video_softc *sc, enum v4l2_buf_type type) 1000 { 1001 int err; 1002 struct video_stream *vs = &sc->sc_stream_in; 1003 const struct video_hw_if *hw; 1004 1005 if (vs->vs_streaming) 1006 return 0; 1007 if (type != vs->vs_type) 1008 return EINVAL; 1009 1010 hw = sc->hw_if; 1011 if (hw == NULL) 1012 return ENXIO; 1013 1014 1015 err = hw->start_transfer(sc->hw_softc); 1016 if (err != 0) 1017 return err; 1018 1019 vs->vs_streaming = true; 1020 return 0; 1021 } 1022 1023 static int 1024 video_stream_off(struct video_softc *sc, enum v4l2_buf_type type) 1025 { 1026 int err; 1027 struct video_stream *vs = &sc->sc_stream_in; 1028 const struct video_hw_if *hw; 1029 1030 if (!vs->vs_streaming) 1031 return 0; 1032 if (type != vs->vs_type) 1033 return EINVAL; 1034 1035 hw = sc->hw_if; 1036 if (hw == NULL) 1037 return ENXIO; 1038 1039 err = hw->stop_transfer(sc->hw_softc); 1040 if (err != 0) 1041 return err; 1042 1043 vs->vs_frameno = -1; 1044 vs->vs_sequence = 0; 1045 vs->vs_streaming = false; 1046 1047 return 0; 1048 } 1049 1050 int 1051 videoopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1052 { 1053 struct video_softc *sc; 1054 const struct video_hw_if *hw; 1055 struct video_stream *vs; 1056 int err; 1057 1058 DPRINTF(("videoopen\n")); 1059 1060 sc = device_private(device_lookup(&video_cd, VIDEOUNIT(dev))); 1061 if (sc == NULL) { 1062 DPRINTF(("videoopen: failed to get softc\n")); 1063 return ENXIO; 1064 } 1065 1066 if (sc->sc_dying) { 1067 DPRINTF(("videoopen: dying\n")); 1068 return EIO; 1069 } 1070 1071 sc->sc_stream_in.vs_flags = flags; 1072 1073 DPRINTF(("videoopen: flags=0x%x sc=%p parent=%p\n", 1074 flags, sc, sc->hw_dev)); 1075 1076 hw = sc->hw_if; 1077 if (hw == NULL) 1078 return ENXIO; 1079 1080 device_active(sc->sc_dev, DVA_SYSTEM); 1081 1082 sc->sc_opencnt++; 1083 1084 if (hw->open != NULL) { 1085 err = hw->open(sc->hw_softc, flags); 1086 if (err) 1087 return err; 1088 } 1089 1090 /* set up input stream. TODO: check flags to determine if 1091 * "read" is desired? */ 1092 vs = &sc->sc_stream_in; 1093 1094 if (hw->get_format != NULL) { 1095 err = hw->get_format(sc->hw_softc, &vs->vs_format); 1096 if (err != 0) 1097 return err; 1098 } 1099 return 0; 1100 } 1101 1102 1103 int 1104 videoclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1105 { 1106 struct video_softc *sc; 1107 const struct video_hw_if *hw; 1108 1109 sc = device_private(device_lookup(&video_cd, VIDEOUNIT(dev))); 1110 if (sc == NULL) 1111 return ENXIO; 1112 1113 DPRINTF(("videoclose: sc=%p\n", sc)); 1114 1115 hw = sc->hw_if; 1116 if (hw == NULL) 1117 return ENXIO; 1118 1119 device_active(sc->sc_dev, DVA_SYSTEM); 1120 1121 video_stream_off(sc, sc->sc_stream_in.vs_type); 1122 1123 /* ignore error */ 1124 if (hw->close != NULL) 1125 hw->close(sc->hw_softc); 1126 1127 video_stream_teardown_bufs(&sc->sc_stream_in); 1128 1129 sc->sc_open = 0; 1130 sc->sc_opencnt--; 1131 1132 return 0; 1133 } 1134 1135 1136 int 1137 videoread(dev_t dev, struct uio *uio, int ioflag) 1138 { 1139 struct video_softc *sc; 1140 struct video_stream *vs; 1141 struct video_buffer *vb; 1142 struct scatter_io sio; 1143 int err; 1144 size_t len; 1145 off_t offset; 1146 1147 sc = device_private(device_lookup(&video_cd, VIDEOUNIT(dev))); 1148 if (sc == NULL) 1149 return ENXIO; 1150 1151 if (sc->sc_dying) 1152 return EIO; 1153 1154 vs = &sc->sc_stream_in; 1155 1156 /* userspace has chosen read() method */ 1157 if (vs->vs_method == VIDEO_STREAM_METHOD_NONE) { 1158 err = video_stream_setup_bufs(vs, 1159 VIDEO_STREAM_METHOD_READ, 1160 VIDEO_NUM_BUFS); 1161 if (err != 0) 1162 return err; 1163 1164 err = video_stream_on(sc, vs->vs_type); 1165 if (err != 0) 1166 return err; 1167 } else if (vs->vs_method != VIDEO_STREAM_METHOD_READ) { 1168 return EBUSY; 1169 } 1170 1171 mutex_enter(&vs->vs_lock); 1172 1173 retry: 1174 if (SIMPLEQ_EMPTY(&vs->vs_egress)) { 1175 if (vs->vs_flags & O_NONBLOCK) { 1176 mutex_exit(&vs->vs_lock); 1177 return EAGAIN; 1178 } 1179 1180 /* Block until we have a sample */ 1181 while (SIMPLEQ_EMPTY(&vs->vs_egress)) { 1182 err = cv_wait_sig(&vs->vs_sample_cv, 1183 &vs->vs_lock); 1184 if (err != 0) { 1185 mutex_exit(&vs->vs_lock); 1186 return EINTR; 1187 } 1188 } 1189 1190 vb = SIMPLEQ_FIRST(&vs->vs_egress); 1191 } else { 1192 vb = SIMPLEQ_FIRST(&vs->vs_egress); 1193 } 1194 1195 /* Oops, empty sample buffer. */ 1196 if (vb->vb_buf->bytesused == 0) { 1197 vb = video_stream_dequeue(vs); 1198 video_stream_enqueue(vs, vb); 1199 vs->vs_bytesread = 0; 1200 goto retry; 1201 } 1202 1203 mutex_exit(&vs->vs_lock); 1204 1205 len = min(uio->uio_resid, vb->vb_buf->bytesused - vs->vs_bytesread); 1206 offset = vb->vb_buf->m.offset + vs->vs_bytesread; 1207 1208 if (scatter_io_init(&vs->vs_data, offset, len, &sio)) { 1209 err = scatter_io_uiomove(&sio, uio); 1210 if (err == EFAULT) 1211 return EFAULT; 1212 vs->vs_bytesread += (len - sio.sio_resid); 1213 } else { 1214 DPRINTF(("video: invalid read\n")); 1215 } 1216 1217 /* Move the sample to the ingress queue if everything has 1218 * been read */ 1219 if (vs->vs_bytesread >= vb->vb_buf->bytesused) { 1220 mutex_enter(&vs->vs_lock); 1221 vb = video_stream_dequeue(vs); 1222 video_stream_enqueue(vs, vb); 1223 mutex_exit(&vs->vs_lock); 1224 1225 vs->vs_bytesread = 0; 1226 } 1227 1228 return 0; 1229 } 1230 1231 1232 int 1233 videowrite(dev_t dev, struct uio *uio, int ioflag) 1234 { 1235 return ENXIO; 1236 } 1237 1238 1239 static void 1240 buf32tobuf(const void *data, struct v4l2_buffer *buf) 1241 { 1242 const struct v4l2_buffer32 *b32 = data; 1243 1244 buf->index = b32->index; 1245 buf->type = b32->type; 1246 buf->bytesused = b32->bytesused; 1247 buf->flags = b32->flags; 1248 buf->field = b32->field; 1249 buf->timestamp.tv_sec = b32->timestamp.tv_sec; 1250 buf->timestamp.tv_usec = b32->timestamp.tv_usec; 1251 buf->timecode = b32->timecode; 1252 buf->sequence = b32->sequence; 1253 buf->memory = b32->memory; 1254 buf->m.offset = b32->m.offset; 1255 /* XXX: Handle userptr */ 1256 buf->length = b32->length; 1257 buf->input = b32->input; 1258 buf->reserved = b32->reserved; 1259 } 1260 1261 static void 1262 buftobuf32(void *data, const struct v4l2_buffer *buf) 1263 { 1264 struct v4l2_buffer32 *b32 = data; 1265 1266 b32->index = buf->index; 1267 b32->type = buf->type; 1268 b32->bytesused = buf->bytesused; 1269 b32->flags = buf->flags; 1270 b32->field = buf->field; 1271 b32->timestamp.tv_sec = (uint32_t)buf->timestamp.tv_sec; 1272 b32->timestamp.tv_usec = buf->timestamp.tv_usec; 1273 b32->timecode = buf->timecode; 1274 b32->sequence = buf->sequence; 1275 b32->memory = buf->memory; 1276 b32->m.offset = buf->m.offset; 1277 /* XXX: Handle userptr */ 1278 b32->length = buf->length; 1279 b32->input = buf->input; 1280 b32->reserved = buf->reserved; 1281 } 1282 1283 int 1284 videoioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 1285 { 1286 struct video_softc *sc; 1287 const struct video_hw_if *hw; 1288 struct v4l2_capability *cap; 1289 struct v4l2_fmtdesc *fmtdesc; 1290 struct v4l2_format *fmt; 1291 struct v4l2_standard *std; 1292 struct v4l2_input *input; 1293 struct v4l2_control *control; 1294 struct v4l2_queryctrl *query; 1295 struct v4l2_requestbuffers *reqbufs; 1296 struct v4l2_buffer *buf, bufspace; 1297 v4l2_std_id *stdid; 1298 enum v4l2_buf_type *typep; 1299 int *ip, error; 1300 1301 sc = device_private(device_lookup(&video_cd, VIDEOUNIT(dev))); 1302 1303 if (sc->sc_dying) 1304 return EIO; 1305 1306 hw = sc->hw_if; 1307 if (hw == NULL) 1308 return ENXIO; 1309 1310 switch (cmd) { 1311 case VIDIOC_QUERYCAP: 1312 cap = data; 1313 memset(cap, 0, sizeof(*cap)); 1314 strlcpy(cap->driver, device_xname(sc->hw_dev), 1315 sizeof(cap->driver)); 1316 strlcpy(cap->card, hw->get_devname(sc->hw_softc), 1317 sizeof(cap->card)); 1318 /* FIXME: bus_info is wrongly hardcoded to USB */ 1319 strlcpy(cap->bus_info, "USB", sizeof(cap->bus_info)); 1320 cap->version = VIDEO_DRIVER_VERSION; 1321 cap->capabilities = 0; 1322 if (hw->start_transfer != NULL && hw->stop_transfer != NULL) 1323 cap->capabilities |= V4L2_CAP_VIDEO_CAPTURE | 1324 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 1325 return 0; 1326 case VIDIOC_ENUM_FMT: 1327 /* TODO: for now, just enumerate one default format */ 1328 fmtdesc = data; 1329 if (fmtdesc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1330 return EINVAL; 1331 return video_enum_format(sc, fmtdesc); 1332 case VIDIOC_G_FMT: 1333 fmt = data; 1334 return (video_get_format(sc, fmt)); 1335 case VIDIOC_S_FMT: 1336 fmt = data; 1337 if ((flag & FWRITE) == 0) 1338 return EPERM; 1339 return video_set_format(sc, fmt); 1340 case VIDIOC_TRY_FMT: 1341 fmt = data; 1342 return (video_try_format(sc, fmt)); 1343 case VIDIOC_ENUMSTD: 1344 /* TODO: implement properly */ 1345 std = data; 1346 if (std->index != 0) 1347 return EINVAL; 1348 std->id = V4L2_STD_UNKNOWN; 1349 strlcpy(std->name, "webcam", sizeof(std->name)); 1350 return 0; 1351 case VIDIOC_G_STD: 1352 /* TODO: implement properly */ 1353 stdid = data; 1354 *stdid = V4L2_STD_UNKNOWN; 1355 return 0; 1356 case VIDIOC_S_STD: 1357 /* TODO: implement properly */ 1358 stdid = data; 1359 if (*stdid != V4L2_STD_UNKNOWN) 1360 return EINVAL; 1361 return 0; 1362 case VIDIOC_ENUMINPUT: 1363 /* TODO: implement properly */ 1364 input = data; 1365 if (input->index != 0) 1366 return EINVAL; 1367 memset(input, 0, sizeof(*input)); 1368 input->index = 0; 1369 strlcpy(input->name, "Camera", sizeof(input->name)); 1370 input->type = V4L2_INPUT_TYPE_CAMERA; 1371 return 0; 1372 case VIDIOC_G_INPUT: 1373 /* TODO: implement properly */ 1374 ip = data; 1375 *ip = 0; 1376 return 0; 1377 case VIDIOC_S_INPUT: 1378 /* TODO: implement properly */ 1379 ip = data; 1380 if (*ip != 0) 1381 return EINVAL; 1382 return 0; 1383 case VIDIOC_QUERYCTRL: 1384 query = data; 1385 return (video_query_control(sc, query)); 1386 case VIDIOC_G_CTRL: 1387 control = data; 1388 return (video_get_control(sc, control)); 1389 case VIDIOC_S_CTRL: 1390 control = data; 1391 if ((flag & FWRITE) == 0) 1392 return EPERM; 1393 return (video_set_control(sc, control)); 1394 case VIDIOC_REQBUFS: 1395 reqbufs = data; 1396 return (video_request_bufs(sc, reqbufs)); 1397 case VIDIOC_QUERYBUF: 1398 buf = data; 1399 return video_query_buf(sc, buf); 1400 case VIDIOC_QUERYBUF32: 1401 buf32tobuf(data, buf = &bufspace); 1402 if ((error = video_query_buf(sc, buf)) != 0) 1403 return error; 1404 buftobuf32(data, buf); 1405 return 0; 1406 case VIDIOC_QBUF: 1407 buf = data; 1408 return video_queue_buf(sc, buf); 1409 case VIDIOC_QBUF32: 1410 buf32tobuf(data, buf = &bufspace); 1411 return video_queue_buf(sc, buf); 1412 case VIDIOC_DQBUF: 1413 buf = data; 1414 return video_dequeue_buf(sc, buf); 1415 case VIDIOC_DQBUF32: 1416 buf32tobuf(data, buf = &bufspace); 1417 if ((error = video_dequeue_buf(sc, buf)) != 0) 1418 return error; 1419 buftobuf32(data, buf); 1420 return 0; 1421 case VIDIOC_STREAMON: 1422 typep = data; 1423 return video_stream_on(sc, *typep); 1424 case VIDIOC_STREAMOFF: 1425 typep = data; 1426 return video_stream_off(sc, *typep); 1427 default: 1428 DPRINTF(("videoioctl: invalid cmd %s (%lx)\n", 1429 video_ioctl_str(cmd), cmd)); 1430 return EINVAL; 1431 } 1432 } 1433 1434 #ifdef VIDEO_DEBUG 1435 static const char * 1436 video_ioctl_str(u_long cmd) 1437 { 1438 const char *str; 1439 1440 switch (cmd) { 1441 case VIDIOC_QUERYCAP: 1442 str = "VIDIOC_QUERYCAP"; 1443 break; 1444 case VIDIOC_RESERVED: 1445 str = "VIDIOC_RESERVED"; 1446 break; 1447 case VIDIOC_ENUM_FMT: 1448 str = "VIDIOC_ENUM_FMT"; 1449 break; 1450 case VIDIOC_G_FMT: 1451 str = "VIDIOC_G_FMT"; 1452 break; 1453 case VIDIOC_S_FMT: 1454 str = "VIDIOC_S_FMT"; 1455 break; 1456 /* 6 and 7 are VIDIOC_[SG]_COMP, which are unsupported */ 1457 case VIDIOC_REQBUFS: 1458 str = "VIDIOC_REQBUFS"; 1459 break; 1460 case VIDIOC_QUERYBUF: 1461 str = "VIDIOC_QUERYBUF"; 1462 break; 1463 case VIDIOC_QUERYBUF32: 1464 str = "VIDIOC_QUERYBUF32"; 1465 break; 1466 case VIDIOC_G_FBUF: 1467 str = "VIDIOC_G_FBUF"; 1468 break; 1469 case VIDIOC_S_FBUF: 1470 str = "VIDIOC_S_FBUF"; 1471 break; 1472 case VIDIOC_OVERLAY: 1473 str = "VIDIOC_OVERLAY"; 1474 break; 1475 case VIDIOC_QBUF: 1476 str = "VIDIOC_QBUF"; 1477 break; 1478 case VIDIOC_QBUF32: 1479 str = "VIDIOC_QBUF32"; 1480 break; 1481 case VIDIOC_DQBUF: 1482 str = "VIDIOC_DQBUF"; 1483 break; 1484 case VIDIOC_DQBUF32: 1485 str = "VIDIOC_DQBUF32"; 1486 break; 1487 case VIDIOC_STREAMON: 1488 str = "VIDIOC_STREAMON"; 1489 break; 1490 case VIDIOC_STREAMOFF: 1491 str = "VIDIOC_STREAMOFF"; 1492 break; 1493 case VIDIOC_G_PARM: 1494 str = "VIDIOC_G_PARAM"; 1495 break; 1496 case VIDIOC_S_PARM: 1497 str = "VIDIOC_S_PARAM"; 1498 break; 1499 case VIDIOC_G_STD: 1500 str = "VIDIOC_G_STD"; 1501 break; 1502 case VIDIOC_S_STD: 1503 str = "VIDIOC_S_STD"; 1504 break; 1505 case VIDIOC_ENUMSTD: 1506 str = "VIDIOC_ENUMSTD"; 1507 break; 1508 case VIDIOC_ENUMINPUT: 1509 str = "VIDIOC_ENUMINPUT"; 1510 break; 1511 case VIDIOC_G_CTRL: 1512 str = "VIDIOC_G_CTRL"; 1513 break; 1514 case VIDIOC_S_CTRL: 1515 str = "VIDIOC_S_CTRL"; 1516 break; 1517 case VIDIOC_G_TUNER: 1518 str = "VIDIOC_G_TUNER"; 1519 break; 1520 case VIDIOC_S_TUNER: 1521 str = "VIDIOC_S_TUNER"; 1522 break; 1523 case VIDIOC_G_AUDIO: 1524 str = "VIDIOC_G_AUDIO"; 1525 break; 1526 case VIDIOC_S_AUDIO: 1527 str = "VIDIOC_S_AUDIO"; 1528 break; 1529 case VIDIOC_QUERYCTRL: 1530 str = "VIDIOC_QUERYCTRL"; 1531 break; 1532 case VIDIOC_QUERYMENU: 1533 str = "VIDIOC_QUERYMENU"; 1534 break; 1535 case VIDIOC_G_INPUT: 1536 str = "VIDIOC_G_INPUT"; 1537 break; 1538 case VIDIOC_S_INPUT: 1539 str = "VIDIOC_S_INPUT"; 1540 break; 1541 case VIDIOC_G_OUTPUT: 1542 str = "VIDIOC_G_OUTPUT"; 1543 break; 1544 case VIDIOC_S_OUTPUT: 1545 str = "VIDIOC_S_OUTPUT"; 1546 break; 1547 case VIDIOC_ENUMOUTPUT: 1548 str = "VIDIOC_ENUMOUTPUT"; 1549 break; 1550 case VIDIOC_G_AUDOUT: 1551 str = "VIDIOC_G_AUDOUT"; 1552 break; 1553 case VIDIOC_S_AUDOUT: 1554 str = "VIDIOC_S_AUDOUT"; 1555 break; 1556 case VIDIOC_G_MODULATOR: 1557 str = "VIDIOC_G_MODULATOR"; 1558 break; 1559 case VIDIOC_S_MODULATOR: 1560 str = "VIDIOC_S_MODULATOR"; 1561 break; 1562 case VIDIOC_G_FREQUENCY: 1563 str = "VIDIOC_G_FREQUENCY"; 1564 break; 1565 case VIDIOC_S_FREQUENCY: 1566 str = "VIDIOC_S_FREQUENCY"; 1567 break; 1568 case VIDIOC_CROPCAP: 1569 str = "VIDIOC_CROPCAP"; 1570 break; 1571 case VIDIOC_G_CROP: 1572 str = "VIDIOC_G_CROP"; 1573 break; 1574 case VIDIOC_S_CROP: 1575 str = "VIDIOC_S_CROP"; 1576 break; 1577 case VIDIOC_G_JPEGCOMP: 1578 str = "VIDIOC_G_JPEGCOMP"; 1579 break; 1580 case VIDIOC_S_JPEGCOMP: 1581 str = "VIDIOC_S_JPEGCOMP"; 1582 break; 1583 case VIDIOC_QUERYSTD: 1584 str = "VIDIOC_QUERYSTD"; 1585 break; 1586 case VIDIOC_TRY_FMT: 1587 str = "VIDIOC_TRY_FMT"; 1588 break; 1589 case VIDIOC_ENUMAUDIO: 1590 str = "VIDIOC_ENUMAUDIO"; 1591 break; 1592 case VIDIOC_ENUMAUDOUT: 1593 str = "VIDIOC_ENUMAUDOUT"; 1594 break; 1595 case VIDIOC_G_PRIORITY: 1596 str = "VIDIOC_G_PRIORITY"; 1597 break; 1598 case VIDIOC_S_PRIORITY: 1599 str = "VIDIOC_S_PRIORITY"; 1600 break; 1601 default: 1602 str = "unknown"; 1603 break; 1604 } 1605 return str; 1606 } 1607 #endif 1608 1609 1610 int 1611 videopoll(dev_t dev, int events, struct lwp *l) 1612 { 1613 struct video_softc *sc; 1614 struct video_stream *vs; 1615 int err, revents = 0; 1616 1617 sc = device_private(device_lookup(&video_cd, VIDEOUNIT(dev))); 1618 vs = &sc->sc_stream_in; 1619 1620 if (sc->sc_dying) 1621 return (POLLHUP); 1622 1623 /* userspace has chosen read() method */ 1624 if (vs->vs_method == VIDEO_STREAM_METHOD_NONE) { 1625 err = video_stream_setup_bufs(vs, 1626 VIDEO_STREAM_METHOD_READ, 1627 VIDEO_NUM_BUFS); 1628 if (err != 0) 1629 return POLLERR; 1630 1631 err = video_stream_on(sc, vs->vs_type); 1632 if (err != 0) 1633 return POLLERR; 1634 } 1635 1636 mutex_enter(&vs->vs_lock); 1637 if (!SIMPLEQ_EMPTY(&sc->sc_stream_in.vs_egress)) 1638 revents |= events & (POLLIN | POLLRDNORM); 1639 else 1640 selrecord(l, &vs->vs_sel); 1641 mutex_exit(&vs->vs_lock); 1642 1643 return (revents); 1644 } 1645 1646 1647 paddr_t 1648 videommap(dev_t dev, off_t off, int prot) 1649 { 1650 struct video_softc *sc; 1651 struct video_stream *vs; 1652 /* paddr_t pa; */ 1653 1654 sc = device_lookup_private(&video_cd, VIDEOUNIT(dev)); 1655 if (sc->sc_dying) 1656 return -1; 1657 1658 vs = &sc->sc_stream_in; 1659 1660 return scatter_buf_map(&vs->vs_data, off); 1661 } 1662 1663 1664 /* Allocates buffers and initizlizes some fields. The format field 1665 * must already have been initialized. */ 1666 void 1667 video_stream_init(struct video_stream *vs) 1668 { 1669 vs->vs_method = VIDEO_STREAM_METHOD_NONE; 1670 vs->vs_flags = 0; 1671 vs->vs_frameno = -1; 1672 vs->vs_sequence = 0; 1673 vs->vs_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1674 vs->vs_nbufs = 0; 1675 vs->vs_buf = NULL; 1676 vs->vs_streaming = false; 1677 1678 memset(&vs->vs_format, 0, sizeof(vs->vs_format)); 1679 1680 SIMPLEQ_INIT(&vs->vs_ingress); 1681 SIMPLEQ_INIT(&vs->vs_egress); 1682 1683 mutex_init(&vs->vs_lock, MUTEX_DEFAULT, IPL_NONE); 1684 cv_init(&vs->vs_sample_cv, "video"); 1685 selinit(&vs->vs_sel); 1686 1687 scatter_buf_init(&vs->vs_data); 1688 } 1689 1690 void 1691 video_stream_fini(struct video_stream *vs) 1692 { 1693 /* Sample data in queues has already been freed */ 1694 /* while (SIMPLEQ_FIRST(&vs->vs_ingress) != NULL) 1695 SIMPLEQ_REMOVE_HEAD(&vs->vs_ingress, entries); 1696 while (SIMPLEQ_FIRST(&vs->vs_egress) != NULL) 1697 SIMPLEQ_REMOVE_HEAD(&vs->vs_egress, entries); */ 1698 1699 mutex_destroy(&vs->vs_lock); 1700 cv_destroy(&vs->vs_sample_cv); 1701 seldestroy(&vs->vs_sel); 1702 1703 scatter_buf_destroy(&vs->vs_data); 1704 } 1705 1706 static int 1707 video_stream_setup_bufs(struct video_stream *vs, 1708 enum video_stream_method method, 1709 uint8_t nbufs) 1710 { 1711 int i, err; 1712 1713 mutex_enter(&vs->vs_lock); 1714 1715 /* Ensure that all allocated buffers are queued and not under 1716 * userspace control. */ 1717 for (i = 0; i < vs->vs_nbufs; ++i) { 1718 if (!(vs->vs_buf[i]->vb_buf->flags & V4L2_BUF_FLAG_QUEUED)) { 1719 mutex_exit(&vs->vs_lock); 1720 return EBUSY; 1721 } 1722 } 1723 1724 /* Allocate the buffers */ 1725 err = video_stream_realloc_bufs(vs, nbufs); 1726 if (err != 0) { 1727 mutex_exit(&vs->vs_lock); 1728 return err; 1729 } 1730 1731 /* Queue up buffers for read method. Other methods are queued 1732 * by VIDIOC_QBUF ioctl. */ 1733 if (method == VIDEO_STREAM_METHOD_READ) { 1734 for (i = 0; i < nbufs; ++i) 1735 if (!(vs->vs_buf[i]->vb_buf->flags & V4L2_BUF_FLAG_QUEUED)) 1736 video_stream_enqueue(vs, vs->vs_buf[i]); 1737 } 1738 1739 vs->vs_method = method; 1740 mutex_exit(&vs->vs_lock); 1741 1742 return 0; 1743 } 1744 1745 /* Free all buffer memory in preparation for close(). This should 1746 * free buffers regardless of errors. Use video_stream_setup_bufs if 1747 * you need to check for errors. Streaming should be off before 1748 * calling this function. */ 1749 static void 1750 video_stream_teardown_bufs(struct video_stream *vs) 1751 { 1752 int err; 1753 1754 mutex_enter(&vs->vs_lock); 1755 1756 if (vs->vs_streaming) { 1757 DPRINTF(("video_stream_teardown_bufs: " 1758 "tearing down bufs while streaming\n")); 1759 } 1760 1761 /* dequeue all buffers */ 1762 while (SIMPLEQ_FIRST(&vs->vs_ingress) != NULL) 1763 SIMPLEQ_REMOVE_HEAD(&vs->vs_ingress, entries); 1764 while (SIMPLEQ_FIRST(&vs->vs_egress) != NULL) 1765 SIMPLEQ_REMOVE_HEAD(&vs->vs_egress, entries); 1766 1767 err = video_stream_free_bufs(vs); 1768 if (err != 0) { 1769 DPRINTF(("video_stream_teardown_bufs: " 1770 "error releasing buffers: %d\n", 1771 err)); 1772 } 1773 vs->vs_method = VIDEO_STREAM_METHOD_NONE; 1774 1775 mutex_exit(&vs->vs_lock); 1776 } 1777 1778 static struct video_buffer * 1779 video_buffer_alloc(void) 1780 { 1781 struct video_buffer *vb; 1782 1783 vb = kmem_alloc(sizeof(*vb), KM_SLEEP); 1784 if (vb == NULL) 1785 return NULL; 1786 1787 vb->vb_buf = kmem_alloc(sizeof(*vb->vb_buf), KM_SLEEP); 1788 if (vb->vb_buf == NULL) { 1789 kmem_free(vb, sizeof(*vb)); 1790 return NULL; 1791 } 1792 1793 return vb; 1794 } 1795 1796 static void 1797 video_buffer_free(struct video_buffer *vb) 1798 { 1799 kmem_free(vb->vb_buf, sizeof(*vb->vb_buf)); 1800 vb->vb_buf = NULL; 1801 kmem_free(vb, sizeof(*vb)); 1802 } 1803 1804 /* TODO: for userptr method 1805 struct video_buffer * 1806 video_buf_alloc_with_ubuf(struct v4l2_buffer *buf) 1807 { 1808 } 1809 1810 void 1811 video_buffer_free_with_ubuf(struct video_buffer *vb) 1812 { 1813 } 1814 */ 1815 1816 static int 1817 video_stream_realloc_bufs(struct video_stream *vs, uint8_t nbufs) 1818 { 1819 int i, err; 1820 uint8_t minnbufs, oldnbufs; 1821 size_t size; 1822 off_t offset; 1823 struct video_buffer **oldbuf; 1824 struct v4l2_buffer *buf; 1825 1826 size = PAGE_ALIGN(vs->vs_format.sample_size) * nbufs; 1827 err = scatter_buf_set_size(&vs->vs_data, size); 1828 if (err != 0) 1829 return err; 1830 1831 oldnbufs = vs->vs_nbufs; 1832 oldbuf = vs->vs_buf; 1833 1834 vs->vs_nbufs = nbufs; 1835 if (nbufs > 0) { 1836 vs->vs_buf = 1837 kmem_alloc(sizeof(struct video_buffer *) * nbufs, KM_SLEEP); 1838 if (vs->vs_buf == NULL) { 1839 vs->vs_nbufs = oldnbufs; 1840 vs->vs_buf = oldbuf; 1841 1842 return ENOMEM; 1843 } 1844 } else { 1845 vs->vs_buf = NULL; 1846 } 1847 1848 minnbufs = min(vs->vs_nbufs, oldnbufs); 1849 /* copy any bufs that will be reused */ 1850 for (i = 0; i < minnbufs; ++i) 1851 vs->vs_buf[i] = oldbuf[i]; 1852 /* allocate any necessary new bufs */ 1853 for (; i < vs->vs_nbufs; ++i) 1854 vs->vs_buf[i] = video_buffer_alloc(); 1855 /* free any bufs no longer used */ 1856 for (; i < oldnbufs; ++i) { 1857 video_buffer_free(oldbuf[i]); 1858 oldbuf[i] = NULL; 1859 } 1860 1861 /* Free old buffer metadata */ 1862 if (oldbuf != NULL) 1863 kmem_free(oldbuf, sizeof(struct video_buffer *) * oldnbufs); 1864 1865 /* initialize bufs */ 1866 offset = 0; 1867 for (i = 0; i < vs->vs_nbufs; ++i) { 1868 buf = vs->vs_buf[i]->vb_buf; 1869 buf->index = i; 1870 buf->type = vs->vs_type; 1871 buf->bytesused = 0; 1872 buf->flags = 0; 1873 buf->field = 0; 1874 buf->sequence = 0; 1875 buf->memory = V4L2_MEMORY_MMAP; 1876 buf->m.offset = offset; 1877 buf->length = PAGE_ALIGN(vs->vs_format.sample_size); 1878 buf->input = 0; 1879 buf->reserved = 0; 1880 1881 offset += buf->length; 1882 } 1883 1884 return 0; 1885 } 1886 1887 /* Accepts a video_sample into the ingress queue. Caller must hold 1888 * the stream lock. */ 1889 void 1890 video_stream_enqueue(struct video_stream *vs, struct video_buffer *vb) 1891 { 1892 if (vb->vb_buf->flags & V4L2_BUF_FLAG_QUEUED) { 1893 DPRINTF(("video_stream_enqueue: sample already queued\n")); 1894 return; 1895 } 1896 1897 vb->vb_buf->flags |= V4L2_BUF_FLAG_QUEUED; 1898 vb->vb_buf->flags &= ~V4L2_BUF_FLAG_DONE; 1899 1900 vb->vb_buf->bytesused = 0; 1901 1902 SIMPLEQ_INSERT_TAIL(&vs->vs_ingress, vb, entries); 1903 } 1904 1905 1906 /* Removes the head of the egress queue for use by userspace. Caller 1907 * must hold the stream lock. */ 1908 struct video_buffer * 1909 video_stream_dequeue(struct video_stream *vs) 1910 { 1911 struct video_buffer *vb; 1912 1913 if (!SIMPLEQ_EMPTY(&vs->vs_egress)) { 1914 vb = SIMPLEQ_FIRST(&vs->vs_egress); 1915 SIMPLEQ_REMOVE_HEAD(&vs->vs_egress, entries); 1916 vb->vb_buf->flags &= ~V4L2_BUF_FLAG_QUEUED; 1917 vb->vb_buf->flags |= V4L2_BUF_FLAG_DONE; 1918 return vb; 1919 } else { 1920 return NULL; 1921 } 1922 } 1923 1924 1925 /* 1926 * write payload data to the appropriate video sample, possibly moving 1927 * the sample from ingress to egress queues 1928 */ 1929 void 1930 video_stream_write(struct video_stream *vs, 1931 const struct video_payload *payload) 1932 { 1933 struct video_buffer *vb; 1934 struct v4l2_buffer *buf; 1935 struct scatter_io sio; 1936 1937 mutex_enter(&vs->vs_lock); 1938 1939 /* change of frameno implies end of current frame */ 1940 if (vs->vs_frameno > 0 && vs->vs_frameno != payload->frameno) 1941 video_stream_sample_done(vs); 1942 1943 if (vs->vs_drop || SIMPLEQ_EMPTY(&vs->vs_ingress)) { 1944 /* DPRINTF(("video_stream_write: dropping sample %d\n", 1945 vs->vs_sequence)); */ 1946 vs->vs_drop = true; 1947 } else if (payload->size > 0) { 1948 vb = SIMPLEQ_FIRST(&vs->vs_ingress); 1949 buf = vb->vb_buf; 1950 if (payload->size > buf->length - buf->bytesused) { 1951 DPRINTF(("video_stream_write: " 1952 "payload would overflow\n")); 1953 } else if (scatter_io_init(&vs->vs_data, 1954 buf->m.offset + buf->bytesused, 1955 payload->size, 1956 &sio)) 1957 { 1958 scatter_io_copyin(&sio, payload->data); 1959 buf->bytesused += (payload->size - sio.sio_resid); 1960 } else { 1961 DPRINTF(("video_stream_write: failed to init scatter io " 1962 "vb=%p buf=%p " 1963 "buf->m.offset=%d buf->bytesused=%u " 1964 "payload->size=%zu\n", 1965 vb, buf, 1966 buf->m.offset, buf->bytesused, payload->size)); 1967 } 1968 } 1969 1970 /* if the payload marks it, we can do sample_done() early */ 1971 if (payload->end_of_frame) 1972 video_stream_sample_done(vs); 1973 1974 mutex_exit(&vs->vs_lock); 1975 } 1976 1977 1978 /* Moves the head of the ingress queue to the tail of the egress 1979 * queue, or resets drop status if we were dropping this sample. 1980 * Caller should hold the stream queue lock. */ 1981 void 1982 video_stream_sample_done(struct video_stream *vs) 1983 { 1984 struct video_buffer *vb; 1985 1986 if (vs->vs_drop) { 1987 vs->vs_drop = false; 1988 } else if (!SIMPLEQ_EMPTY(&vs->vs_ingress)) { 1989 vb = SIMPLEQ_FIRST(&vs->vs_ingress); 1990 vb->vb_buf->sequence = vs->vs_sequence; 1991 SIMPLEQ_REMOVE_HEAD(&vs->vs_ingress, entries); 1992 1993 SIMPLEQ_INSERT_TAIL(&vs->vs_egress, vb, entries); 1994 cv_signal(&vs->vs_sample_cv); 1995 selnotify(&vs->vs_sel, 0, 0); 1996 } else { 1997 DPRINTF(("video_stream_sample_done: no sample\n")); 1998 } 1999 2000 vs->vs_frameno ^= 1; 2001 vs->vs_sequence++; 2002 } 2003 2004 /* Check if all buffers are queued, i.e. none are under control of 2005 * userspace. */ 2006 /* 2007 static bool 2008 video_stream_all_queued(struct video_stream *vs) 2009 { 2010 } 2011 */ 2012 2013 2014 static void 2015 scatter_buf_init(struct scatter_buf *sb) 2016 { 2017 sb->sb_pool = pool_cache_init(PAGE_SIZE, 0, 0, 0, 2018 "video", NULL, IPL_VIDEO, 2019 NULL, NULL, NULL); 2020 sb->sb_size = 0; 2021 sb->sb_npages = 0; 2022 sb->sb_page_ary = NULL; 2023 } 2024 2025 static void 2026 scatter_buf_destroy(struct scatter_buf *sb) 2027 { 2028 /* Do we need to return everything to the pool first? */ 2029 scatter_buf_set_size(sb, 0); 2030 pool_cache_destroy(sb->sb_pool); 2031 sb->sb_pool = 0; 2032 sb->sb_npages = 0; 2033 sb->sb_page_ary = NULL; 2034 } 2035 2036 /* Increase or decrease the size of the buffer */ 2037 static int 2038 scatter_buf_set_size(struct scatter_buf *sb, size_t sz) 2039 { 2040 int i; 2041 size_t npages, minpages, oldnpages; 2042 uint8_t **old_ary; 2043 2044 npages = (sz >> PAGE_SHIFT) + ((sz & PAGE_MASK) > 0); 2045 2046 if (sb->sb_npages == npages) { 2047 return 0; 2048 } 2049 2050 oldnpages = sb->sb_npages; 2051 old_ary = sb->sb_page_ary; 2052 2053 sb->sb_npages = npages; 2054 if (npages > 0) { 2055 sb->sb_page_ary = 2056 kmem_alloc(sizeof(uint8_t *) * npages, KM_SLEEP); 2057 if (sb->sb_page_ary == NULL) { 2058 sb->sb_npages = oldnpages; 2059 sb->sb_page_ary = old_ary; 2060 return ENOMEM; 2061 } 2062 } else { 2063 sb->sb_page_ary = NULL; 2064 } 2065 2066 minpages = min(npages, oldnpages); 2067 /* copy any pages that will be reused */ 2068 for (i = 0; i < minpages; ++i) 2069 sb->sb_page_ary[i] = old_ary[i]; 2070 /* allocate any new pages */ 2071 for (; i < npages; ++i) { 2072 sb->sb_page_ary[i] = pool_cache_get(sb->sb_pool, 0); 2073 /* TODO: does pool_cache_get return NULL on 2074 * ENOMEM? If so, we need to release or note 2075 * the pages with did allocate 2076 * successfully. */ 2077 if (sb->sb_page_ary[i] == NULL) { 2078 DPRINTF(("video: pool_cache_get ENOMEM\n")); 2079 return ENOMEM; 2080 } 2081 } 2082 /* return any pages no longer needed */ 2083 for (; i < oldnpages; ++i) 2084 pool_cache_put(sb->sb_pool, old_ary[i]); 2085 2086 if (old_ary != NULL) 2087 kmem_free(old_ary, sizeof(uint8_t *) * oldnpages); 2088 2089 sb->sb_size = sb->sb_npages << PAGE_SHIFT; 2090 2091 return 0; 2092 } 2093 2094 2095 static paddr_t 2096 scatter_buf_map(struct scatter_buf *sb, off_t off) 2097 { 2098 size_t pg; 2099 paddr_t pa; 2100 2101 pg = off >> PAGE_SHIFT; 2102 2103 if (pg >= sb->sb_npages) 2104 return -1; 2105 else if (!pmap_extract(pmap_kernel(), (vaddr_t)sb->sb_page_ary[pg], &pa)) 2106 return -1; 2107 2108 return atop(pa); 2109 } 2110 2111 /* Initialize data for an io operation on a scatter buffer. Returns 2112 * true if the transfer is valid, or false if out of range. */ 2113 static bool 2114 scatter_io_init(struct scatter_buf *sb, 2115 off_t off, size_t len, 2116 struct scatter_io *sio) 2117 { 2118 if ((off + len) > sb->sb_size) { 2119 DPRINTF(("video: scatter_io_init failed: off=%" PRId64 2120 " len=%zu sb->sb_size=%zu\n", 2121 off, len, sb->sb_size)); 2122 return false; 2123 } 2124 2125 sio->sio_buf = sb; 2126 sio->sio_offset = off; 2127 sio->sio_resid = len; 2128 2129 return true; 2130 } 2131 2132 /* Store the pointer and size of the next contiguous segment. Returns 2133 * true if the segment is valid, or false if all has been transfered. 2134 * Does not check for overflow. */ 2135 static bool 2136 scatter_io_next(struct scatter_io *sio, void **p, size_t *sz) 2137 { 2138 size_t pg, pgo; 2139 2140 if (sio->sio_resid == 0) 2141 return false; 2142 2143 pg = sio->sio_offset >> PAGE_SHIFT; 2144 pgo = sio->sio_offset & PAGE_MASK; 2145 2146 *sz = min(PAGE_SIZE - pgo, sio->sio_resid); 2147 *p = sio->sio_buf->sb_page_ary[pg] + pgo; 2148 2149 sio->sio_offset += *sz; 2150 sio->sio_resid -= *sz; 2151 2152 return true; 2153 } 2154 2155 /* Semi-undo of a failed segment copy. Updates the scatter_io 2156 * struct to the previous values prior to a failed segment copy. */ 2157 static void 2158 scatter_io_undo(struct scatter_io *sio, size_t sz) 2159 { 2160 sio->sio_offset -= sz; 2161 sio->sio_resid += sz; 2162 } 2163 2164 /* Copy data from src into the scatter_buf as described by io. */ 2165 static void 2166 scatter_io_copyin(struct scatter_io *sio, const void *p) 2167 { 2168 void *dst; 2169 const uint8_t *src = p; 2170 size_t sz; 2171 2172 while(scatter_io_next(sio, &dst, &sz)) { 2173 memcpy(dst, src, sz); 2174 src += sz; 2175 } 2176 } 2177 2178 /* --not used; commented to avoid compiler warnings-- 2179 static void 2180 scatter_io_copyout(struct scatter_io *sio, void *p) 2181 { 2182 void *src; 2183 uint8_t *dst = p; 2184 size_t sz; 2185 2186 while(scatter_io_next(sio, &src, &sz)) { 2187 memcpy(dst, src, sz); 2188 dst += sz; 2189 } 2190 } 2191 */ 2192 2193 /* Performat a series of uiomove calls on a scatter buf. Returns 2194 * EFAULT if uiomove EFAULTs on the first segment. Otherwise, returns 2195 * an incomplete transfer but with no error. */ 2196 static int 2197 scatter_io_uiomove(struct scatter_io *sio, struct uio *uio) 2198 { 2199 void *p; 2200 size_t sz; 2201 bool first = true; 2202 int err; 2203 2204 while(scatter_io_next(sio, &p, &sz)) { 2205 err = uiomove(p, sz, uio); 2206 if (err == EFAULT) { 2207 scatter_io_undo(sio, sz); 2208 if (first) 2209 return EFAULT; 2210 else 2211 return 0; 2212 } 2213 first = false; 2214 } 2215 2216 return 0; 2217 } 2218 2219 #endif /* NVIDEO > 0 */ 2220