Commit | Line | Data |
---|---|---|
7a7d9a89 MCC |
1 | /* |
2 | * generic helper functions for handling video4linux capture buffers | |
3 | * | |
4 | * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org> | |
5 | * | |
6 | * Highly based on video-buf written originally by: | |
7 | * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> | |
8 | * (c) 2006 Mauro Carvalho Chehab, <mchehab@infradead.org> | |
9 | * (c) 2006 Ted Walther and John Sokol | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 | |
14 | */ | |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/moduleparam.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/interrupt.h> | |
21 | ||
22 | #include <media/videobuf-core.h> | |
23 | ||
24 | #define MAGIC_BUFFER 0x20070728 | |
e2c77314 MCC |
25 | #define MAGIC_CHECK(is, should) do { \ |
26 | if (unlikely((is) != (should))) { \ | |
27 | printk(KERN_ERR "magic mismatch: %x (expected %x)\n", is, should); \ | |
28 | BUG(); } } while (0) | |
7a7d9a89 | 29 | |
e2c77314 | 30 | static int debug; |
7a7d9a89 MCC |
31 | module_param(debug, int, 0644); |
32 | ||
33 | MODULE_DESCRIPTION("helper module to manage video4linux buffers"); | |
34 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
e2c77314 MCC |
37 | #define dprintk(level, fmt, arg...) do { \ |
38 | if (debug >= level) \ | |
39 | printk(KERN_DEBUG "vbuf: " fmt , ## arg); } while (0) | |
7a7d9a89 MCC |
40 | |
41 | /* --------------------------------------------------------------------- */ | |
42 | ||
43 | #define CALL(q, f, arg...) \ | |
e2c77314 | 44 | ((q->int_ops->f) ? q->int_ops->f(arg) : 0) |
7a7d9a89 | 45 | |
e2c77314 | 46 | void *videobuf_alloc(struct videobuf_queue *q) |
7a7d9a89 MCC |
47 | { |
48 | struct videobuf_buffer *vb; | |
49 | ||
e2c77314 | 50 | BUG_ON(q->msize < sizeof(*vb)); |
7a7d9a89 MCC |
51 | |
52 | if (!q->int_ops || !q->int_ops->alloc) { | |
53 | printk(KERN_ERR "No specific ops defined!\n"); | |
54 | BUG(); | |
55 | } | |
56 | ||
57 | vb = q->int_ops->alloc(q->msize); | |
58 | ||
59 | if (NULL != vb) { | |
60 | init_waitqueue_head(&vb->done); | |
61 | vb->magic = MAGIC_BUFFER; | |
62 | } | |
63 | ||
64 | return vb; | |
65 | } | |
66 | ||
67 | int videobuf_waiton(struct videobuf_buffer *vb, int non_blocking, int intr) | |
68 | { | |
69 | int retval = 0; | |
70 | DECLARE_WAITQUEUE(wait, current); | |
71 | ||
e2c77314 | 72 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
7a7d9a89 | 73 | add_wait_queue(&vb->done, &wait); |
0fc0686e | 74 | while (vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) { |
7a7d9a89 MCC |
75 | if (non_blocking) { |
76 | retval = -EAGAIN; | |
77 | break; | |
78 | } | |
79 | set_current_state(intr ? TASK_INTERRUPTIBLE | |
80 | : TASK_UNINTERRUPTIBLE); | |
e2c77314 MCC |
81 | if (vb->state == VIDEOBUF_ACTIVE || |
82 | vb->state == VIDEOBUF_QUEUED) | |
7a7d9a89 MCC |
83 | schedule(); |
84 | set_current_state(TASK_RUNNING); | |
85 | if (intr && signal_pending(current)) { | |
e2c77314 | 86 | dprintk(1, "buffer waiton: -EINTR\n"); |
7a7d9a89 MCC |
87 | retval = -EINTR; |
88 | break; | |
89 | } | |
90 | } | |
91 | remove_wait_queue(&vb->done, &wait); | |
92 | return retval; | |
93 | } | |
94 | ||
e2c77314 | 95 | int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, |
7a7d9a89 MCC |
96 | struct v4l2_framebuffer *fbuf) |
97 | { | |
e2c77314 MCC |
98 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
99 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); | |
7a7d9a89 | 100 | |
d05051c8 | 101 | /* This is required to avoid OOPS on some cases, |
e2c77314 | 102 | since mmap_mapper() method should be called before _iolock. |
d5f1b016 | 103 | On some cases, the mmap_mapper() is called only after scheduling. |
d5f1b016 | 104 | */ |
1f8d3008 MCC |
105 | if (vb->memory == V4L2_MEMORY_MMAP) { |
106 | wait_event_timeout(vb->done, q->is_mmapped, | |
107 | msecs_to_jiffies(100)); | |
108 | if (!q->is_mmapped) { | |
109 | printk(KERN_ERR | |
110 | "Error: mmap_mapper() never called!\n"); | |
111 | return -EINVAL; | |
112 | } | |
d05051c8 | 113 | } |
d5f1b016 | 114 | |
e2c77314 | 115 | return CALL(q, iolock, q, vb, fbuf); |
7a7d9a89 MCC |
116 | } |
117 | ||
118 | /* --------------------------------------------------------------------- */ | |
119 | ||
120 | ||
e2c77314 | 121 | void videobuf_queue_core_init(struct videobuf_queue *q, |
7a7d9a89 MCC |
122 | struct videobuf_queue_ops *ops, |
123 | void *dev, | |
124 | spinlock_t *irqlock, | |
125 | enum v4l2_buf_type type, | |
126 | enum v4l2_field field, | |
127 | unsigned int msize, | |
d4cae5a5 MCC |
128 | void *priv, |
129 | struct videobuf_qtype_ops *int_ops) | |
7a7d9a89 | 130 | { |
e2c77314 | 131 | memset(q, 0, sizeof(*q)); |
d4cae5a5 MCC |
132 | q->irqlock = irqlock; |
133 | q->dev = dev; | |
134 | q->type = type; | |
135 | q->field = field; | |
136 | q->msize = msize; | |
137 | q->ops = ops; | |
7a7d9a89 | 138 | q->priv_data = priv; |
d4cae5a5 | 139 | q->int_ops = int_ops; |
7a7d9a89 MCC |
140 | |
141 | /* All buffer operations are mandatory */ | |
e2c77314 MCC |
142 | BUG_ON(!q->ops->buf_setup); |
143 | BUG_ON(!q->ops->buf_prepare); | |
144 | BUG_ON(!q->ops->buf_queue); | |
145 | BUG_ON(!q->ops->buf_release); | |
7a7d9a89 | 146 | |
d4cae5a5 | 147 | /* Having implementations for abstract methods are mandatory */ |
e2c77314 | 148 | BUG_ON(!q->int_ops); |
d4cae5a5 | 149 | |
64f9477f | 150 | mutex_init(&q->vb_lock); |
7a7d9a89 MCC |
151 | INIT_LIST_HEAD(&q->stream); |
152 | } | |
153 | ||
19bc5133 | 154 | /* Locking: Only usage in bttv unsafe find way to remove */ |
7a7d9a89 MCC |
155 | int videobuf_queue_is_busy(struct videobuf_queue *q) |
156 | { | |
157 | int i; | |
158 | ||
e2c77314 | 159 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 MCC |
160 | |
161 | if (q->streaming) { | |
e2c77314 | 162 | dprintk(1, "busy: streaming active\n"); |
7a7d9a89 MCC |
163 | return 1; |
164 | } | |
165 | if (q->reading) { | |
e2c77314 | 166 | dprintk(1, "busy: pending read #1\n"); |
7a7d9a89 MCC |
167 | return 1; |
168 | } | |
169 | if (q->read_buf) { | |
e2c77314 | 170 | dprintk(1, "busy: pending read #2\n"); |
7a7d9a89 MCC |
171 | return 1; |
172 | } | |
173 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { | |
174 | if (NULL == q->bufs[i]) | |
175 | continue; | |
851c0c96 | 176 | if (q->bufs[i]->map) { |
e2c77314 | 177 | dprintk(1, "busy: buffer #%d mapped\n", i); |
7a7d9a89 MCC |
178 | return 1; |
179 | } | |
0fc0686e | 180 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
e2c77314 | 181 | dprintk(1, "busy: buffer #%d queued\n", i); |
7a7d9a89 MCC |
182 | return 1; |
183 | } | |
0fc0686e | 184 | if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { |
e2c77314 | 185 | dprintk(1, "busy: buffer #%d avtive\n", i); |
7a7d9a89 MCC |
186 | return 1; |
187 | } | |
188 | } | |
189 | return 0; | |
190 | } | |
191 | ||
64f9477f | 192 | /* Locking: Caller holds q->vb_lock */ |
7a7d9a89 MCC |
193 | void videobuf_queue_cancel(struct videobuf_queue *q) |
194 | { | |
e2c77314 | 195 | unsigned long flags = 0; |
7a7d9a89 MCC |
196 | int i; |
197 | ||
198 | /* remove queued buffers from list */ | |
199 | if (q->irqlock) | |
e2c77314 | 200 | spin_lock_irqsave(q->irqlock, flags); |
7a7d9a89 MCC |
201 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
202 | if (NULL == q->bufs[i]) | |
203 | continue; | |
0fc0686e | 204 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
7a7d9a89 | 205 | list_del(&q->bufs[i]->queue); |
0fc0686e | 206 | q->bufs[i]->state = VIDEOBUF_ERROR; |
7a7d9a89 MCC |
207 | } |
208 | } | |
209 | if (q->irqlock) | |
e2c77314 | 210 | spin_unlock_irqrestore(q->irqlock, flags); |
7a7d9a89 MCC |
211 | |
212 | /* free all buffers + clear queue */ | |
213 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { | |
214 | if (NULL == q->bufs[i]) | |
215 | continue; | |
e2c77314 | 216 | q->ops->buf_release(q, q->bufs[i]); |
7a7d9a89 MCC |
217 | } |
218 | INIT_LIST_HEAD(&q->stream); | |
219 | } | |
220 | ||
221 | /* --------------------------------------------------------------------- */ | |
222 | ||
64f9477f | 223 | /* Locking: Caller holds q->vb_lock */ |
7a7d9a89 MCC |
224 | enum v4l2_field videobuf_next_field(struct videobuf_queue *q) |
225 | { | |
226 | enum v4l2_field field = q->field; | |
227 | ||
228 | BUG_ON(V4L2_FIELD_ANY == field); | |
229 | ||
230 | if (V4L2_FIELD_ALTERNATE == field) { | |
231 | if (V4L2_FIELD_TOP == q->last) { | |
232 | field = V4L2_FIELD_BOTTOM; | |
233 | q->last = V4L2_FIELD_BOTTOM; | |
234 | } else { | |
235 | field = V4L2_FIELD_TOP; | |
236 | q->last = V4L2_FIELD_TOP; | |
237 | } | |
238 | } | |
239 | return field; | |
240 | } | |
241 | ||
64f9477f | 242 | /* Locking: Caller holds q->vb_lock */ |
7a7d9a89 MCC |
243 | static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, |
244 | struct videobuf_buffer *vb, enum v4l2_buf_type type) | |
245 | { | |
e2c77314 MCC |
246 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
247 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); | |
7a7d9a89 MCC |
248 | |
249 | b->index = vb->i; | |
250 | b->type = type; | |
251 | ||
252 | b->memory = vb->memory; | |
253 | switch (b->memory) { | |
254 | case V4L2_MEMORY_MMAP: | |
255 | b->m.offset = vb->boff; | |
256 | b->length = vb->bsize; | |
257 | break; | |
258 | case V4L2_MEMORY_USERPTR: | |
259 | b->m.userptr = vb->baddr; | |
260 | b->length = vb->bsize; | |
261 | break; | |
262 | case V4L2_MEMORY_OVERLAY: | |
263 | b->m.offset = vb->boff; | |
264 | break; | |
265 | } | |
266 | ||
267 | b->flags = 0; | |
851c0c96 | 268 | if (vb->map) |
7a7d9a89 MCC |
269 | b->flags |= V4L2_BUF_FLAG_MAPPED; |
270 | ||
271 | switch (vb->state) { | |
0fc0686e BP |
272 | case VIDEOBUF_PREPARED: |
273 | case VIDEOBUF_QUEUED: | |
274 | case VIDEOBUF_ACTIVE: | |
7a7d9a89 MCC |
275 | b->flags |= V4L2_BUF_FLAG_QUEUED; |
276 | break; | |
0fc0686e BP |
277 | case VIDEOBUF_DONE: |
278 | case VIDEOBUF_ERROR: | |
7a7d9a89 MCC |
279 | b->flags |= V4L2_BUF_FLAG_DONE; |
280 | break; | |
0fc0686e BP |
281 | case VIDEOBUF_NEEDS_INIT: |
282 | case VIDEOBUF_IDLE: | |
7a7d9a89 MCC |
283 | /* nothing */ |
284 | break; | |
285 | } | |
286 | ||
287 | if (vb->input != UNSET) { | |
288 | b->flags |= V4L2_BUF_FLAG_INPUT; | |
289 | b->input = vb->input; | |
290 | } | |
291 | ||
292 | b->field = vb->field; | |
293 | b->timestamp = vb->ts; | |
294 | b->bytesused = vb->size; | |
295 | b->sequence = vb->field_count >> 1; | |
296 | } | |
297 | ||
64f9477f | 298 | /* Locking: Caller holds q->vb_lock */ |
19bc5133 BP |
299 | static int __videobuf_mmap_free(struct videobuf_queue *q) |
300 | { | |
301 | int i; | |
302 | int rc; | |
303 | ||
304 | if (!q) | |
305 | return 0; | |
306 | ||
e2c77314 | 307 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
19bc5133 | 308 | |
d05051c8 | 309 | |
e2c77314 | 310 | rc = CALL(q, mmap_free, q); |
d05051c8 MCC |
311 | |
312 | q->is_mmapped = 0; | |
313 | ||
e2c77314 | 314 | if (rc < 0) |
19bc5133 BP |
315 | return rc; |
316 | ||
317 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { | |
318 | if (NULL == q->bufs[i]) | |
319 | continue; | |
e2c77314 | 320 | q->ops->buf_release(q, q->bufs[i]); |
19bc5133 BP |
321 | kfree(q->bufs[i]); |
322 | q->bufs[i] = NULL; | |
323 | } | |
324 | ||
325 | return rc; | |
326 | } | |
327 | ||
328 | int videobuf_mmap_free(struct videobuf_queue *q) | |
329 | { | |
330 | int ret; | |
64f9477f | 331 | mutex_lock(&q->vb_lock); |
19bc5133 | 332 | ret = __videobuf_mmap_free(q); |
64f9477f | 333 | mutex_unlock(&q->vb_lock); |
19bc5133 BP |
334 | return ret; |
335 | } | |
336 | ||
64f9477f | 337 | /* Locking: Caller holds q->vb_lock */ |
19bc5133 BP |
338 | static int __videobuf_mmap_setup(struct videobuf_queue *q, |
339 | unsigned int bcount, unsigned int bsize, | |
340 | enum v4l2_memory memory) | |
341 | { | |
342 | unsigned int i; | |
343 | int err; | |
344 | ||
e2c77314 | 345 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
19bc5133 BP |
346 | |
347 | err = __videobuf_mmap_free(q); | |
348 | if (0 != err) | |
349 | return err; | |
350 | ||
351 | /* Allocate and initialize buffers */ | |
352 | for (i = 0; i < bcount; i++) { | |
353 | q->bufs[i] = videobuf_alloc(q); | |
354 | ||
355 | if (q->bufs[i] == NULL) | |
356 | break; | |
357 | ||
358 | q->bufs[i]->i = i; | |
359 | q->bufs[i]->input = UNSET; | |
360 | q->bufs[i]->memory = memory; | |
361 | q->bufs[i]->bsize = bsize; | |
362 | switch (memory) { | |
363 | case V4L2_MEMORY_MMAP: | |
364 | q->bufs[i]->boff = bsize * i; | |
365 | break; | |
366 | case V4L2_MEMORY_USERPTR: | |
367 | case V4L2_MEMORY_OVERLAY: | |
368 | /* nothing */ | |
369 | break; | |
370 | } | |
371 | } | |
372 | ||
373 | if (!i) | |
374 | return -ENOMEM; | |
375 | ||
e2c77314 | 376 | dprintk(1, "mmap setup: %d buffers, %d bytes each\n", |
19bc5133 BP |
377 | i, bsize); |
378 | ||
379 | return i; | |
380 | } | |
381 | ||
382 | int videobuf_mmap_setup(struct videobuf_queue *q, | |
383 | unsigned int bcount, unsigned int bsize, | |
384 | enum v4l2_memory memory) | |
385 | { | |
386 | int ret; | |
64f9477f | 387 | mutex_lock(&q->vb_lock); |
19bc5133 | 388 | ret = __videobuf_mmap_setup(q, bcount, bsize, memory); |
64f9477f | 389 | mutex_unlock(&q->vb_lock); |
19bc5133 BP |
390 | return ret; |
391 | } | |
392 | ||
7a7d9a89 MCC |
393 | int videobuf_reqbufs(struct videobuf_queue *q, |
394 | struct v4l2_requestbuffers *req) | |
395 | { | |
e2c77314 | 396 | unsigned int size, count; |
7a7d9a89 MCC |
397 | int retval; |
398 | ||
7a7d9a89 | 399 | if (req->count < 1) { |
e2c77314 | 400 | dprintk(1, "reqbufs: count invalid (%d)\n", req->count); |
7a7d9a89 MCC |
401 | return -EINVAL; |
402 | } | |
19bc5133 | 403 | |
7a7d9a89 MCC |
404 | if (req->memory != V4L2_MEMORY_MMAP && |
405 | req->memory != V4L2_MEMORY_USERPTR && | |
406 | req->memory != V4L2_MEMORY_OVERLAY) { | |
e2c77314 | 407 | dprintk(1, "reqbufs: memory type invalid\n"); |
7a7d9a89 MCC |
408 | return -EINVAL; |
409 | } | |
410 | ||
64f9477f | 411 | mutex_lock(&q->vb_lock); |
19bc5133 | 412 | if (req->type != q->type) { |
e2c77314 | 413 | dprintk(1, "reqbufs: queue type invalid\n"); |
19bc5133 BP |
414 | retval = -EINVAL; |
415 | goto done; | |
416 | } | |
417 | ||
7a7d9a89 | 418 | if (q->streaming) { |
e2c77314 | 419 | dprintk(1, "reqbufs: streaming already exists\n"); |
00f98d08 BP |
420 | retval = -EBUSY; |
421 | goto done; | |
7a7d9a89 MCC |
422 | } |
423 | if (!list_empty(&q->stream)) { | |
e2c77314 | 424 | dprintk(1, "reqbufs: stream running\n"); |
00f98d08 BP |
425 | retval = -EBUSY; |
426 | goto done; | |
7a7d9a89 MCC |
427 | } |
428 | ||
7a7d9a89 MCC |
429 | count = req->count; |
430 | if (count > VIDEO_MAX_FRAME) | |
431 | count = VIDEO_MAX_FRAME; | |
432 | size = 0; | |
e2c77314 | 433 | q->ops->buf_setup(q, &count, &size); |
7a7d9a89 | 434 | size = PAGE_ALIGN(size); |
e2c77314 | 435 | dprintk(1, "reqbufs: bufs=%d, size=0x%x [%d pages total]\n", |
7a7d9a89 MCC |
436 | count, size, (count*size)>>PAGE_SHIFT); |
437 | ||
e2c77314 | 438 | retval = __videobuf_mmap_setup(q, count, size, req->memory); |
7a7d9a89 | 439 | if (retval < 0) { |
e2c77314 | 440 | dprintk(1, "reqbufs: mmap setup returned %d\n", retval); |
7a7d9a89 MCC |
441 | goto done; |
442 | } | |
443 | ||
49ee718e | 444 | req->count = retval; |
7a7d9a89 MCC |
445 | |
446 | done: | |
64f9477f | 447 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
448 | return retval; |
449 | } | |
450 | ||
451 | int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) | |
452 | { | |
19bc5133 BP |
453 | int ret = -EINVAL; |
454 | ||
64f9477f | 455 | mutex_lock(&q->vb_lock); |
7a7d9a89 | 456 | if (unlikely(b->type != q->type)) { |
e2c77314 | 457 | dprintk(1, "querybuf: Wrong type.\n"); |
19bc5133 | 458 | goto done; |
7a7d9a89 MCC |
459 | } |
460 | if (unlikely(b->index < 0 || b->index >= VIDEO_MAX_FRAME)) { | |
e2c77314 | 461 | dprintk(1, "querybuf: index out of range.\n"); |
19bc5133 | 462 | goto done; |
7a7d9a89 MCC |
463 | } |
464 | if (unlikely(NULL == q->bufs[b->index])) { | |
e2c77314 | 465 | dprintk(1, "querybuf: buffer is null.\n"); |
19bc5133 | 466 | goto done; |
7a7d9a89 | 467 | } |
19bc5133 | 468 | |
e2c77314 | 469 | videobuf_status(q, b, q->bufs[b->index], q->type); |
19bc5133 BP |
470 | |
471 | ret = 0; | |
472 | done: | |
64f9477f | 473 | mutex_unlock(&q->vb_lock); |
19bc5133 | 474 | return ret; |
7a7d9a89 MCC |
475 | } |
476 | ||
477 | int videobuf_qbuf(struct videobuf_queue *q, | |
478 | struct v4l2_buffer *b) | |
479 | { | |
480 | struct videobuf_buffer *buf; | |
481 | enum v4l2_field field; | |
e2c77314 | 482 | unsigned long flags = 0; |
7a7d9a89 MCC |
483 | int retval; |
484 | ||
e2c77314 | 485 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 | 486 | |
9900132f ML |
487 | if (b->memory == V4L2_MEMORY_MMAP) |
488 | down_read(¤t->mm->mmap_sem); | |
489 | ||
64f9477f | 490 | mutex_lock(&q->vb_lock); |
7a7d9a89 MCC |
491 | retval = -EBUSY; |
492 | if (q->reading) { | |
e2c77314 | 493 | dprintk(1, "qbuf: Reading running...\n"); |
7a7d9a89 MCC |
494 | goto done; |
495 | } | |
496 | retval = -EINVAL; | |
497 | if (b->type != q->type) { | |
e2c77314 | 498 | dprintk(1, "qbuf: Wrong type.\n"); |
7a7d9a89 MCC |
499 | goto done; |
500 | } | |
501 | if (b->index < 0 || b->index >= VIDEO_MAX_FRAME) { | |
e2c77314 | 502 | dprintk(1, "qbuf: index out of range.\n"); |
7a7d9a89 MCC |
503 | goto done; |
504 | } | |
505 | buf = q->bufs[b->index]; | |
506 | if (NULL == buf) { | |
e2c77314 | 507 | dprintk(1, "qbuf: buffer is null.\n"); |
7a7d9a89 MCC |
508 | goto done; |
509 | } | |
e2c77314 | 510 | MAGIC_CHECK(buf->magic, MAGIC_BUFFER); |
7a7d9a89 | 511 | if (buf->memory != b->memory) { |
e2c77314 | 512 | dprintk(1, "qbuf: memory type is wrong.\n"); |
7a7d9a89 MCC |
513 | goto done; |
514 | } | |
0fc0686e | 515 | if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { |
e2c77314 | 516 | dprintk(1, "qbuf: buffer is already queued or active.\n"); |
7a7d9a89 MCC |
517 | goto done; |
518 | } | |
519 | ||
520 | if (b->flags & V4L2_BUF_FLAG_INPUT) { | |
521 | if (b->input >= q->inputs) { | |
e2c77314 | 522 | dprintk(1, "qbuf: wrong input.\n"); |
7a7d9a89 MCC |
523 | goto done; |
524 | } | |
525 | buf->input = b->input; | |
526 | } else { | |
527 | buf->input = UNSET; | |
528 | } | |
529 | ||
530 | switch (b->memory) { | |
531 | case V4L2_MEMORY_MMAP: | |
532 | if (0 == buf->baddr) { | |
e2c77314 MCC |
533 | dprintk(1, "qbuf: mmap requested " |
534 | "but buffer addr is zero!\n"); | |
7a7d9a89 MCC |
535 | goto done; |
536 | } | |
537 | break; | |
538 | case V4L2_MEMORY_USERPTR: | |
539 | if (b->length < buf->bsize) { | |
e2c77314 | 540 | dprintk(1, "qbuf: buffer length is not enough\n"); |
7a7d9a89 MCC |
541 | goto done; |
542 | } | |
e2c77314 MCC |
543 | if (VIDEOBUF_NEEDS_INIT != buf->state && |
544 | buf->baddr != b->m.userptr) | |
545 | q->ops->buf_release(q, buf); | |
7a7d9a89 MCC |
546 | buf->baddr = b->m.userptr; |
547 | break; | |
548 | case V4L2_MEMORY_OVERLAY: | |
549 | buf->boff = b->m.offset; | |
550 | break; | |
551 | default: | |
e2c77314 | 552 | dprintk(1, "qbuf: wrong memory type\n"); |
7a7d9a89 MCC |
553 | goto done; |
554 | } | |
555 | ||
e2c77314 | 556 | dprintk(1, "qbuf: requesting next field\n"); |
7a7d9a89 | 557 | field = videobuf_next_field(q); |
e2c77314 | 558 | retval = q->ops->buf_prepare(q, buf, field); |
7a7d9a89 | 559 | if (0 != retval) { |
e2c77314 | 560 | dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); |
7a7d9a89 MCC |
561 | goto done; |
562 | } | |
563 | ||
e2c77314 | 564 | list_add_tail(&buf->stream, &q->stream); |
7a7d9a89 MCC |
565 | if (q->streaming) { |
566 | if (q->irqlock) | |
e2c77314 MCC |
567 | spin_lock_irqsave(q->irqlock, flags); |
568 | q->ops->buf_queue(q, buf); | |
7a7d9a89 | 569 | if (q->irqlock) |
e2c77314 | 570 | spin_unlock_irqrestore(q->irqlock, flags); |
7a7d9a89 | 571 | } |
e2c77314 | 572 | dprintk(1, "qbuf: succeded\n"); |
7a7d9a89 MCC |
573 | retval = 0; |
574 | ||
575 | done: | |
64f9477f | 576 | mutex_unlock(&q->vb_lock); |
9900132f ML |
577 | |
578 | if (b->memory == V4L2_MEMORY_MMAP) | |
579 | up_read(¤t->mm->mmap_sem); | |
580 | ||
7a7d9a89 MCC |
581 | return retval; |
582 | } | |
583 | ||
584 | int videobuf_dqbuf(struct videobuf_queue *q, | |
585 | struct v4l2_buffer *b, int nonblocking) | |
586 | { | |
587 | struct videobuf_buffer *buf; | |
588 | int retval; | |
589 | ||
e2c77314 | 590 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 | 591 | |
64f9477f | 592 | mutex_lock(&q->vb_lock); |
7a7d9a89 MCC |
593 | retval = -EBUSY; |
594 | if (q->reading) { | |
e2c77314 | 595 | dprintk(1, "dqbuf: Reading running...\n"); |
7a7d9a89 MCC |
596 | goto done; |
597 | } | |
598 | retval = -EINVAL; | |
599 | if (b->type != q->type) { | |
e2c77314 | 600 | dprintk(1, "dqbuf: Wrong type.\n"); |
7a7d9a89 MCC |
601 | goto done; |
602 | } | |
603 | if (list_empty(&q->stream)) { | |
e2c77314 | 604 | dprintk(1, "dqbuf: stream running\n"); |
7a7d9a89 MCC |
605 | goto done; |
606 | } | |
607 | buf = list_entry(q->stream.next, struct videobuf_buffer, stream); | |
608 | retval = videobuf_waiton(buf, nonblocking, 1); | |
609 | if (retval < 0) { | |
e2c77314 | 610 | dprintk(1, "dqbuf: waiton returned %d\n", retval); |
7a7d9a89 MCC |
611 | goto done; |
612 | } | |
613 | switch (buf->state) { | |
0fc0686e | 614 | case VIDEOBUF_ERROR: |
e2c77314 | 615 | dprintk(1, "dqbuf: state is error\n"); |
7a7d9a89 | 616 | retval = -EIO; |
e2c77314 | 617 | CALL(q, sync, q, buf); |
0fc0686e | 618 | buf->state = VIDEOBUF_IDLE; |
7a7d9a89 | 619 | break; |
0fc0686e | 620 | case VIDEOBUF_DONE: |
e2c77314 MCC |
621 | dprintk(1, "dqbuf: state is done\n"); |
622 | CALL(q, sync, q, buf); | |
0fc0686e | 623 | buf->state = VIDEOBUF_IDLE; |
7a7d9a89 MCC |
624 | break; |
625 | default: | |
e2c77314 | 626 | dprintk(1, "dqbuf: state invalid\n"); |
7a7d9a89 MCC |
627 | retval = -EINVAL; |
628 | goto done; | |
629 | } | |
630 | list_del(&buf->stream); | |
e2c77314 MCC |
631 | memset(b, 0, sizeof(*b)); |
632 | videobuf_status(q, b, buf, q->type); | |
7a7d9a89 MCC |
633 | |
634 | done: | |
64f9477f | 635 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
636 | return retval; |
637 | } | |
638 | ||
639 | int videobuf_streamon(struct videobuf_queue *q) | |
640 | { | |
641 | struct videobuf_buffer *buf; | |
e2c77314 | 642 | unsigned long flags = 0; |
7a7d9a89 MCC |
643 | int retval; |
644 | ||
64f9477f | 645 | mutex_lock(&q->vb_lock); |
7a7d9a89 MCC |
646 | retval = -EBUSY; |
647 | if (q->reading) | |
648 | goto done; | |
649 | retval = 0; | |
650 | if (q->streaming) | |
651 | goto done; | |
652 | q->streaming = 1; | |
653 | if (q->irqlock) | |
e2c77314 | 654 | spin_lock_irqsave(q->irqlock, flags); |
a991f44b | 655 | list_for_each_entry(buf, &q->stream, stream) |
0fc0686e | 656 | if (buf->state == VIDEOBUF_PREPARED) |
e2c77314 | 657 | q->ops->buf_queue(q, buf); |
7a7d9a89 | 658 | if (q->irqlock) |
e2c77314 | 659 | spin_unlock_irqrestore(q->irqlock, flags); |
7a7d9a89 MCC |
660 | |
661 | done: | |
64f9477f | 662 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
663 | return retval; |
664 | } | |
665 | ||
64f9477f | 666 | /* Locking: Caller holds q->vb_lock */ |
19bc5133 | 667 | static int __videobuf_streamoff(struct videobuf_queue *q) |
7a7d9a89 | 668 | { |
7a7d9a89 | 669 | if (!q->streaming) |
19bc5133 BP |
670 | return -EINVAL; |
671 | ||
7a7d9a89 MCC |
672 | videobuf_queue_cancel(q); |
673 | q->streaming = 0; | |
7a7d9a89 | 674 | |
19bc5133 BP |
675 | return 0; |
676 | } | |
677 | ||
678 | int videobuf_streamoff(struct videobuf_queue *q) | |
679 | { | |
680 | int retval; | |
681 | ||
64f9477f | 682 | mutex_lock(&q->vb_lock); |
19bc5133 | 683 | retval = __videobuf_streamoff(q); |
64f9477f | 684 | mutex_unlock(&q->vb_lock); |
19bc5133 | 685 | |
7a7d9a89 MCC |
686 | return retval; |
687 | } | |
688 | ||
64f9477f | 689 | /* Locking: Caller holds q->vb_lock */ |
7a7d9a89 MCC |
690 | static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, |
691 | char __user *data, | |
692 | size_t count, loff_t *ppos) | |
693 | { | |
694 | enum v4l2_field field; | |
e2c77314 | 695 | unsigned long flags = 0; |
7a7d9a89 MCC |
696 | int retval; |
697 | ||
e2c77314 | 698 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 MCC |
699 | |
700 | /* setup stuff */ | |
701 | q->read_buf = videobuf_alloc(q); | |
702 | if (NULL == q->read_buf) | |
703 | return -ENOMEM; | |
704 | ||
705 | q->read_buf->memory = V4L2_MEMORY_USERPTR; | |
706 | q->read_buf->baddr = (unsigned long)data; | |
707 | q->read_buf->bsize = count; | |
708 | ||
709 | field = videobuf_next_field(q); | |
e2c77314 | 710 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
7a7d9a89 MCC |
711 | if (0 != retval) |
712 | goto done; | |
713 | ||
714 | /* start capture & wait */ | |
715 | if (q->irqlock) | |
e2c77314 MCC |
716 | spin_lock_irqsave(q->irqlock, flags); |
717 | q->ops->buf_queue(q, q->read_buf); | |
7a7d9a89 | 718 | if (q->irqlock) |
e2c77314 MCC |
719 | spin_unlock_irqrestore(q->irqlock, flags); |
720 | retval = videobuf_waiton(q->read_buf, 0, 0); | |
7a7d9a89 | 721 | if (0 == retval) { |
e2c77314 | 722 | CALL(q, sync, q, q->read_buf); |
0fc0686e | 723 | if (VIDEOBUF_ERROR == q->read_buf->state) |
7a7d9a89 MCC |
724 | retval = -EIO; |
725 | else | |
726 | retval = q->read_buf->size; | |
727 | } | |
728 | ||
729 | done: | |
730 | /* cleanup */ | |
e2c77314 | 731 | q->ops->buf_release(q, q->read_buf); |
7a7d9a89 MCC |
732 | kfree(q->read_buf); |
733 | q->read_buf = NULL; | |
734 | return retval; | |
735 | } | |
736 | ||
737 | ssize_t videobuf_read_one(struct videobuf_queue *q, | |
738 | char __user *data, size_t count, loff_t *ppos, | |
739 | int nonblocking) | |
740 | { | |
741 | enum v4l2_field field; | |
e2c77314 | 742 | unsigned long flags = 0; |
7a7d9a89 MCC |
743 | unsigned size, nbufs; |
744 | int retval; | |
745 | ||
e2c77314 | 746 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 | 747 | |
64f9477f | 748 | mutex_lock(&q->vb_lock); |
7a7d9a89 MCC |
749 | |
750 | nbufs = 1; size = 0; | |
e2c77314 | 751 | q->ops->buf_setup(q, &nbufs, &size); |
7a7d9a89 MCC |
752 | |
753 | if (NULL == q->read_buf && | |
754 | count >= size && | |
755 | !nonblocking) { | |
e2c77314 | 756 | retval = videobuf_read_zerocopy(q, data, count, ppos); |
7a7d9a89 MCC |
757 | if (retval >= 0 || retval == -EIO) |
758 | /* ok, all done */ | |
759 | goto done; | |
760 | /* fallback to kernel bounce buffer on failures */ | |
761 | } | |
762 | ||
763 | if (NULL == q->read_buf) { | |
764 | /* need to capture a new frame */ | |
765 | retval = -ENOMEM; | |
766 | q->read_buf = videobuf_alloc(q); | |
767 | ||
e2c77314 | 768 | dprintk(1, "video alloc=0x%p\n", q->read_buf); |
7a7d9a89 MCC |
769 | if (NULL == q->read_buf) |
770 | goto done; | |
771 | q->read_buf->memory = V4L2_MEMORY_USERPTR; | |
772 | q->read_buf->bsize = count; /* preferred size */ | |
773 | field = videobuf_next_field(q); | |
e2c77314 | 774 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
7a7d9a89 MCC |
775 | |
776 | if (0 != retval) { | |
e2c77314 | 777 | kfree(q->read_buf); |
7a7d9a89 MCC |
778 | q->read_buf = NULL; |
779 | goto done; | |
780 | } | |
781 | if (q->irqlock) | |
e2c77314 | 782 | spin_lock_irqsave(q->irqlock, flags); |
7a7d9a89 | 783 | |
e2c77314 | 784 | q->ops->buf_queue(q, q->read_buf); |
7a7d9a89 | 785 | if (q->irqlock) |
e2c77314 | 786 | spin_unlock_irqrestore(q->irqlock, flags); |
7a7d9a89 MCC |
787 | q->read_off = 0; |
788 | } | |
789 | ||
790 | /* wait until capture is done */ | |
791 | retval = videobuf_waiton(q->read_buf, nonblocking, 1); | |
792 | if (0 != retval) | |
793 | goto done; | |
794 | ||
e2c77314 | 795 | CALL(q, sync, q, q->read_buf); |
7a7d9a89 | 796 | |
0fc0686e | 797 | if (VIDEOBUF_ERROR == q->read_buf->state) { |
7a7d9a89 | 798 | /* catch I/O errors */ |
e2c77314 | 799 | q->ops->buf_release(q, q->read_buf); |
7a7d9a89 MCC |
800 | kfree(q->read_buf); |
801 | q->read_buf = NULL; | |
802 | retval = -EIO; | |
803 | goto done; | |
804 | } | |
805 | ||
806 | /* Copy to userspace */ | |
e2c77314 MCC |
807 | retval = CALL(q, video_copy_to_user, q, data, count, nonblocking); |
808 | if (retval < 0) | |
7a7d9a89 MCC |
809 | goto done; |
810 | ||
811 | q->read_off += retval; | |
812 | if (q->read_off == q->read_buf->size) { | |
813 | /* all data copied, cleanup */ | |
e2c77314 | 814 | q->ops->buf_release(q, q->read_buf); |
7a7d9a89 MCC |
815 | kfree(q->read_buf); |
816 | q->read_buf = NULL; | |
817 | } | |
818 | ||
819 | done: | |
64f9477f | 820 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
821 | return retval; |
822 | } | |
823 | ||
64f9477f | 824 | /* Locking: Caller holds q->vb_lock */ |
225ba900 | 825 | static int __videobuf_read_start(struct videobuf_queue *q) |
7a7d9a89 MCC |
826 | { |
827 | enum v4l2_field field; | |
e2c77314 | 828 | unsigned long flags = 0; |
49ee718e | 829 | unsigned int count = 0, size = 0; |
7a7d9a89 MCC |
830 | int err, i; |
831 | ||
e2c77314 | 832 | q->ops->buf_setup(q, &count, &size); |
7a7d9a89 MCC |
833 | if (count < 2) |
834 | count = 2; | |
835 | if (count > VIDEO_MAX_FRAME) | |
836 | count = VIDEO_MAX_FRAME; | |
837 | size = PAGE_ALIGN(size); | |
838 | ||
19bc5133 | 839 | err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); |
49ee718e | 840 | if (err < 0) |
7a7d9a89 MCC |
841 | return err; |
842 | ||
49ee718e BP |
843 | count = err; |
844 | ||
7a7d9a89 MCC |
845 | for (i = 0; i < count; i++) { |
846 | field = videobuf_next_field(q); | |
e2c77314 | 847 | err = q->ops->buf_prepare(q, q->bufs[i], field); |
7a7d9a89 MCC |
848 | if (err) |
849 | return err; | |
850 | list_add_tail(&q->bufs[i]->stream, &q->stream); | |
851 | } | |
852 | if (q->irqlock) | |
e2c77314 | 853 | spin_lock_irqsave(q->irqlock, flags); |
7a7d9a89 | 854 | for (i = 0; i < count; i++) |
e2c77314 | 855 | q->ops->buf_queue(q, q->bufs[i]); |
7a7d9a89 | 856 | if (q->irqlock) |
e2c77314 | 857 | spin_unlock_irqrestore(q->irqlock, flags); |
7a7d9a89 MCC |
858 | q->reading = 1; |
859 | return 0; | |
860 | } | |
861 | ||
19bc5133 | 862 | static void __videobuf_read_stop(struct videobuf_queue *q) |
7a7d9a89 MCC |
863 | { |
864 | int i; | |
865 | ||
19bc5133 | 866 | |
7a7d9a89 | 867 | videobuf_queue_cancel(q); |
19bc5133 | 868 | __videobuf_mmap_free(q); |
7a7d9a89 MCC |
869 | INIT_LIST_HEAD(&q->stream); |
870 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { | |
871 | if (NULL == q->bufs[i]) | |
872 | continue; | |
873 | kfree(q->bufs[i]); | |
874 | q->bufs[i] = NULL; | |
875 | } | |
876 | q->read_buf = NULL; | |
877 | q->reading = 0; | |
e2c77314 | 878 | |
19bc5133 BP |
879 | } |
880 | ||
19fb1457 MCC |
881 | int videobuf_read_start(struct videobuf_queue *q) |
882 | { | |
883 | int rc; | |
884 | ||
64f9477f | 885 | mutex_lock(&q->vb_lock); |
19fb1457 | 886 | rc = __videobuf_read_start(q); |
64f9477f | 887 | mutex_unlock(&q->vb_lock); |
19fb1457 MCC |
888 | |
889 | return rc; | |
890 | } | |
891 | ||
19bc5133 BP |
892 | void videobuf_read_stop(struct videobuf_queue *q) |
893 | { | |
64f9477f | 894 | mutex_lock(&q->vb_lock); |
19bc5133 | 895 | __videobuf_read_stop(q); |
64f9477f | 896 | mutex_unlock(&q->vb_lock); |
19bc5133 BP |
897 | } |
898 | ||
899 | void videobuf_stop(struct videobuf_queue *q) | |
900 | { | |
64f9477f | 901 | mutex_lock(&q->vb_lock); |
19bc5133 BP |
902 | |
903 | if (q->streaming) | |
904 | __videobuf_streamoff(q); | |
905 | ||
906 | if (q->reading) | |
907 | __videobuf_read_stop(q); | |
908 | ||
64f9477f | 909 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
910 | } |
911 | ||
19bc5133 | 912 | |
7a7d9a89 MCC |
913 | ssize_t videobuf_read_stream(struct videobuf_queue *q, |
914 | char __user *data, size_t count, loff_t *ppos, | |
915 | int vbihack, int nonblocking) | |
916 | { | |
917 | int rc, retval; | |
e2c77314 | 918 | unsigned long flags = 0; |
7a7d9a89 | 919 | |
e2c77314 | 920 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 | 921 | |
e2c77314 | 922 | dprintk(2, "%s\n", __FUNCTION__); |
64f9477f | 923 | mutex_lock(&q->vb_lock); |
7a7d9a89 MCC |
924 | retval = -EBUSY; |
925 | if (q->streaming) | |
926 | goto done; | |
927 | if (!q->reading) { | |
3f84307a | 928 | retval = __videobuf_read_start(q); |
7a7d9a89 MCC |
929 | if (retval < 0) |
930 | goto done; | |
931 | } | |
932 | ||
933 | retval = 0; | |
934 | while (count > 0) { | |
935 | /* get / wait for data */ | |
936 | if (NULL == q->read_buf) { | |
937 | q->read_buf = list_entry(q->stream.next, | |
938 | struct videobuf_buffer, | |
939 | stream); | |
940 | list_del(&q->read_buf->stream); | |
941 | q->read_off = 0; | |
942 | } | |
943 | rc = videobuf_waiton(q->read_buf, nonblocking, 1); | |
944 | if (rc < 0) { | |
945 | if (0 == retval) | |
946 | retval = rc; | |
947 | break; | |
948 | } | |
949 | ||
0fc0686e | 950 | if (q->read_buf->state == VIDEOBUF_DONE) { |
e2c77314 | 951 | rc = CALL(q, copy_stream, q, data + retval, count, |
7a7d9a89 MCC |
952 | retval, vbihack, nonblocking); |
953 | if (rc < 0) { | |
954 | retval = rc; | |
955 | break; | |
956 | } | |
957 | retval += rc; | |
958 | count -= rc; | |
959 | q->read_off += rc; | |
960 | } else { | |
961 | /* some error */ | |
962 | q->read_off = q->read_buf->size; | |
963 | if (0 == retval) | |
964 | retval = -EIO; | |
965 | } | |
966 | ||
967 | /* requeue buffer when done with copying */ | |
968 | if (q->read_off == q->read_buf->size) { | |
969 | list_add_tail(&q->read_buf->stream, | |
970 | &q->stream); | |
971 | if (q->irqlock) | |
e2c77314 MCC |
972 | spin_lock_irqsave(q->irqlock, flags); |
973 | q->ops->buf_queue(q, q->read_buf); | |
7a7d9a89 | 974 | if (q->irqlock) |
e2c77314 | 975 | spin_unlock_irqrestore(q->irqlock, flags); |
7a7d9a89 MCC |
976 | q->read_buf = NULL; |
977 | } | |
978 | if (retval < 0) | |
979 | break; | |
980 | } | |
981 | ||
982 | done: | |
64f9477f | 983 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
984 | return retval; |
985 | } | |
986 | ||
987 | unsigned int videobuf_poll_stream(struct file *file, | |
988 | struct videobuf_queue *q, | |
989 | poll_table *wait) | |
990 | { | |
991 | struct videobuf_buffer *buf = NULL; | |
992 | unsigned int rc = 0; | |
993 | ||
64f9477f | 994 | mutex_lock(&q->vb_lock); |
7a7d9a89 MCC |
995 | if (q->streaming) { |
996 | if (!list_empty(&q->stream)) | |
997 | buf = list_entry(q->stream.next, | |
998 | struct videobuf_buffer, stream); | |
999 | } else { | |
1000 | if (!q->reading) | |
3f84307a | 1001 | __videobuf_read_start(q); |
7a7d9a89 MCC |
1002 | if (!q->reading) { |
1003 | rc = POLLERR; | |
1004 | } else if (NULL == q->read_buf) { | |
1005 | q->read_buf = list_entry(q->stream.next, | |
1006 | struct videobuf_buffer, | |
1007 | stream); | |
1008 | list_del(&q->read_buf->stream); | |
1009 | q->read_off = 0; | |
1010 | } | |
1011 | buf = q->read_buf; | |
1012 | } | |
1013 | if (!buf) | |
1014 | rc = POLLERR; | |
1015 | ||
1016 | if (0 == rc) { | |
1017 | poll_wait(file, &buf->done, wait); | |
0fc0686e BP |
1018 | if (buf->state == VIDEOBUF_DONE || |
1019 | buf->state == VIDEOBUF_ERROR) | |
7a7d9a89 MCC |
1020 | rc = POLLIN|POLLRDNORM; |
1021 | } | |
64f9477f | 1022 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
1023 | return rc; |
1024 | } | |
1025 | ||
7a7d9a89 MCC |
1026 | int videobuf_mmap_mapper(struct videobuf_queue *q, |
1027 | struct vm_area_struct *vma) | |
1028 | { | |
1029 | int retval; | |
1030 | ||
e2c77314 | 1031 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 | 1032 | |
64f9477f | 1033 | mutex_lock(&q->vb_lock); |
e2c77314 | 1034 | retval = CALL(q, mmap_mapper, q, vma); |
d05051c8 | 1035 | q->is_mmapped = 1; |
64f9477f | 1036 | mutex_unlock(&q->vb_lock); |
7a7d9a89 MCC |
1037 | |
1038 | return retval; | |
1039 | } | |
1040 | ||
1041 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1042 | int videobuf_cgmbuf(struct videobuf_queue *q, | |
1043 | struct video_mbuf *mbuf, int count) | |
1044 | { | |
1045 | struct v4l2_requestbuffers req; | |
e2c77314 | 1046 | int rc, i; |
7a7d9a89 | 1047 | |
e2c77314 | 1048 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
7a7d9a89 | 1049 | |
e2c77314 | 1050 | memset(&req, 0, sizeof(req)); |
7a7d9a89 MCC |
1051 | req.type = q->type; |
1052 | req.count = count; | |
1053 | req.memory = V4L2_MEMORY_MMAP; | |
e2c77314 | 1054 | rc = videobuf_reqbufs(q, &req); |
7a7d9a89 MCC |
1055 | if (rc < 0) |
1056 | return rc; | |
1057 | ||
1058 | mbuf->frames = req.count; | |
1059 | mbuf->size = 0; | |
1060 | for (i = 0; i < mbuf->frames; i++) { | |
1061 | mbuf->offsets[i] = q->bufs[i]->boff; | |
1062 | mbuf->size += q->bufs[i]->bsize; | |
1063 | } | |
1064 | ||
1065 | return 0; | |
1066 | } | |
a13625c5 | 1067 | EXPORT_SYMBOL_GPL(videobuf_cgmbuf); |
7a7d9a89 MCC |
1068 | #endif |
1069 | ||
1070 | /* --------------------------------------------------------------------- */ | |
1071 | ||
1072 | EXPORT_SYMBOL_GPL(videobuf_waiton); | |
1073 | EXPORT_SYMBOL_GPL(videobuf_iolock); | |
1074 | ||
1075 | EXPORT_SYMBOL_GPL(videobuf_alloc); | |
1076 | ||
d4cae5a5 | 1077 | EXPORT_SYMBOL_GPL(videobuf_queue_core_init); |
7a7d9a89 MCC |
1078 | EXPORT_SYMBOL_GPL(videobuf_queue_cancel); |
1079 | EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); | |
1080 | ||
1081 | EXPORT_SYMBOL_GPL(videobuf_next_field); | |
1082 | EXPORT_SYMBOL_GPL(videobuf_reqbufs); | |
1083 | EXPORT_SYMBOL_GPL(videobuf_querybuf); | |
1084 | EXPORT_SYMBOL_GPL(videobuf_qbuf); | |
1085 | EXPORT_SYMBOL_GPL(videobuf_dqbuf); | |
7a7d9a89 MCC |
1086 | EXPORT_SYMBOL_GPL(videobuf_streamon); |
1087 | EXPORT_SYMBOL_GPL(videobuf_streamoff); | |
1088 | ||
19fb1457 | 1089 | EXPORT_SYMBOL_GPL(videobuf_read_start); |
7a7d9a89 | 1090 | EXPORT_SYMBOL_GPL(videobuf_read_stop); |
19bc5133 | 1091 | EXPORT_SYMBOL_GPL(videobuf_stop); |
7a7d9a89 MCC |
1092 | EXPORT_SYMBOL_GPL(videobuf_read_stream); |
1093 | EXPORT_SYMBOL_GPL(videobuf_read_one); | |
1094 | EXPORT_SYMBOL_GPL(videobuf_poll_stream); | |
1095 | ||
1096 | EXPORT_SYMBOL_GPL(videobuf_mmap_setup); | |
1097 | EXPORT_SYMBOL_GPL(videobuf_mmap_free); | |
1098 | EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); |