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Commit | Line | Data |
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7f98639d PO |
1 | /* |
2 | * Memory-to-memory device framework for Video for Linux 2 and videobuf. | |
3 | * | |
4 | * Helper functions for devices that use videobuf buffers for both their | |
5 | * source and destination. | |
6 | * | |
7 | * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd. | |
95072084 | 8 | * Pawel Osciak, <pawel@osciak.com> |
7f98639d PO |
9 | * Marek Szyprowski, <m.szyprowski@samsung.com> |
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 the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | */ | |
16 | #include <linux/module.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/slab.h> | |
19 | ||
c139990e | 20 | #include <media/videobuf2-v4l2.h> |
7f98639d | 21 | #include <media/v4l2-mem2mem.h> |
08eb8510 HV |
22 | #include <media/v4l2-dev.h> |
23 | #include <media/v4l2-fh.h> | |
24 | #include <media/v4l2-event.h> | |
7f98639d PO |
25 | |
26 | MODULE_DESCRIPTION("Mem to mem device framework for videobuf"); | |
95072084 | 27 | MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>"); |
7f98639d PO |
28 | MODULE_LICENSE("GPL"); |
29 | ||
30 | static bool debug; | |
31 | module_param(debug, bool, 0644); | |
32 | ||
33 | #define dprintk(fmt, arg...) \ | |
34 | do { \ | |
35 | if (debug) \ | |
36 | printk(KERN_DEBUG "%s: " fmt, __func__, ## arg);\ | |
37 | } while (0) | |
38 | ||
39 | ||
40 | /* Instance is already queued on the job_queue */ | |
41 | #define TRANS_QUEUED (1 << 0) | |
42 | /* Instance is currently running in hardware */ | |
43 | #define TRANS_RUNNING (1 << 1) | |
2ad5389b SAB |
44 | /* Instance is currently aborting */ |
45 | #define TRANS_ABORT (1 << 2) | |
7f98639d PO |
46 | |
47 | ||
48 | /* Offset base for buffers on the destination queue - used to distinguish | |
49 | * between source and destination buffers when mmapping - they receive the same | |
50 | * offsets but for different queues */ | |
51 | #define DST_QUEUE_OFF_BASE (1 << 30) | |
52 | ||
53 | ||
54 | /** | |
55 | * struct v4l2_m2m_dev - per-device context | |
56 | * @curr_ctx: currently running instance | |
57 | * @job_queue: instances queued to run | |
58 | * @job_spinlock: protects job_queue | |
59 | * @m2m_ops: driver callbacks | |
60 | */ | |
61 | struct v4l2_m2m_dev { | |
62 | struct v4l2_m2m_ctx *curr_ctx; | |
63 | ||
64 | struct list_head job_queue; | |
65 | spinlock_t job_spinlock; | |
66 | ||
b1252eb8 | 67 | const struct v4l2_m2m_ops *m2m_ops; |
7f98639d PO |
68 | }; |
69 | ||
70 | static struct v4l2_m2m_queue_ctx *get_queue_ctx(struct v4l2_m2m_ctx *m2m_ctx, | |
71 | enum v4l2_buf_type type) | |
72 | { | |
908a0d7c | 73 | if (V4L2_TYPE_IS_OUTPUT(type)) |
7f98639d | 74 | return &m2m_ctx->out_q_ctx; |
908a0d7c MS |
75 | else |
76 | return &m2m_ctx->cap_q_ctx; | |
7f98639d PO |
77 | } |
78 | ||
908a0d7c | 79 | struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx, |
7f98639d PO |
80 | enum v4l2_buf_type type) |
81 | { | |
82 | struct v4l2_m2m_queue_ctx *q_ctx; | |
83 | ||
84 | q_ctx = get_queue_ctx(m2m_ctx, type); | |
85 | if (!q_ctx) | |
86 | return NULL; | |
87 | ||
88 | return &q_ctx->q; | |
89 | } | |
90 | EXPORT_SYMBOL(v4l2_m2m_get_vq); | |
91 | ||
908a0d7c | 92 | void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx) |
7f98639d | 93 | { |
d5451c1d | 94 | struct v4l2_m2m_buffer *b; |
7f98639d PO |
95 | unsigned long flags; |
96 | ||
908a0d7c | 97 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); |
7f98639d | 98 | |
a6bd62be AP |
99 | if (list_empty(&q_ctx->rdy_queue)) { |
100 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); | |
101 | return NULL; | |
102 | } | |
7f98639d | 103 | |
c392e9e1 | 104 | b = list_first_entry(&q_ctx->rdy_queue, struct v4l2_m2m_buffer, list); |
908a0d7c MS |
105 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
106 | return &b->vb; | |
7f98639d PO |
107 | } |
108 | EXPORT_SYMBOL_GPL(v4l2_m2m_next_buf); | |
109 | ||
908a0d7c | 110 | void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx) |
7f98639d | 111 | { |
d5451c1d | 112 | struct v4l2_m2m_buffer *b; |
7f98639d PO |
113 | unsigned long flags; |
114 | ||
908a0d7c | 115 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); |
a6bd62be AP |
116 | if (list_empty(&q_ctx->rdy_queue)) { |
117 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); | |
118 | return NULL; | |
7f98639d | 119 | } |
c392e9e1 | 120 | b = list_first_entry(&q_ctx->rdy_queue, struct v4l2_m2m_buffer, list); |
a6bd62be AP |
121 | list_del(&b->list); |
122 | q_ctx->num_rdy--; | |
908a0d7c | 123 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
7f98639d | 124 | |
908a0d7c | 125 | return &b->vb; |
7f98639d PO |
126 | } |
127 | EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove); | |
128 | ||
d4987564 SV |
129 | void v4l2_m2m_buf_remove_by_buf(struct v4l2_m2m_queue_ctx *q_ctx, |
130 | struct vb2_v4l2_buffer *vbuf) | |
131 | { | |
132 | struct v4l2_m2m_buffer *b; | |
133 | unsigned long flags; | |
134 | ||
135 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); | |
136 | b = container_of(vbuf, struct v4l2_m2m_buffer, vb); | |
137 | list_del(&b->list); | |
138 | q_ctx->num_rdy--; | |
139 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove_by_buf); | |
142 | ||
143 | struct vb2_v4l2_buffer * | |
144 | v4l2_m2m_buf_remove_by_idx(struct v4l2_m2m_queue_ctx *q_ctx, unsigned int idx) | |
145 | ||
146 | { | |
147 | struct v4l2_m2m_buffer *b, *tmp; | |
148 | struct vb2_v4l2_buffer *ret = NULL; | |
149 | unsigned long flags; | |
150 | ||
151 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); | |
152 | list_for_each_entry_safe(b, tmp, &q_ctx->rdy_queue, list) { | |
153 | if (b->vb.vb2_buf.index == idx) { | |
154 | list_del(&b->list); | |
155 | q_ctx->num_rdy--; | |
156 | ret = &b->vb; | |
157 | break; | |
158 | } | |
159 | } | |
160 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); | |
161 | ||
162 | return ret; | |
163 | } | |
164 | EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove_by_idx); | |
165 | ||
7f98639d PO |
166 | /* |
167 | * Scheduling handlers | |
168 | */ | |
169 | ||
7f98639d PO |
170 | void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev) |
171 | { | |
172 | unsigned long flags; | |
173 | void *ret = NULL; | |
174 | ||
175 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); | |
176 | if (m2m_dev->curr_ctx) | |
177 | ret = m2m_dev->curr_ctx->priv; | |
178 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
179 | ||
180 | return ret; | |
181 | } | |
182 | EXPORT_SYMBOL(v4l2_m2m_get_curr_priv); | |
183 | ||
184 | /** | |
185 | * v4l2_m2m_try_run() - select next job to perform and run it if possible | |
186 | * | |
187 | * Get next transaction (if present) from the waiting jobs list and run it. | |
188 | */ | |
189 | static void v4l2_m2m_try_run(struct v4l2_m2m_dev *m2m_dev) | |
190 | { | |
191 | unsigned long flags; | |
192 | ||
193 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); | |
194 | if (NULL != m2m_dev->curr_ctx) { | |
195 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
196 | dprintk("Another instance is running, won't run now\n"); | |
197 | return; | |
198 | } | |
199 | ||
200 | if (list_empty(&m2m_dev->job_queue)) { | |
201 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
202 | dprintk("No job pending\n"); | |
203 | return; | |
204 | } | |
205 | ||
c392e9e1 | 206 | m2m_dev->curr_ctx = list_first_entry(&m2m_dev->job_queue, |
7f98639d PO |
207 | struct v4l2_m2m_ctx, queue); |
208 | m2m_dev->curr_ctx->job_flags |= TRANS_RUNNING; | |
209 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
210 | ||
211 | m2m_dev->m2m_ops->device_run(m2m_dev->curr_ctx->priv); | |
212 | } | |
213 | ||
1190a419 | 214 | void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx) |
7f98639d PO |
215 | { |
216 | struct v4l2_m2m_dev *m2m_dev; | |
b730627a | 217 | unsigned long flags_job, flags_out, flags_cap; |
7f98639d PO |
218 | |
219 | m2m_dev = m2m_ctx->m2m_dev; | |
220 | dprintk("Trying to schedule a job for m2m_ctx: %p\n", m2m_ctx); | |
221 | ||
222 | if (!m2m_ctx->out_q_ctx.q.streaming | |
223 | || !m2m_ctx->cap_q_ctx.q.streaming) { | |
224 | dprintk("Streaming needs to be on for both queues\n"); | |
225 | return; | |
226 | } | |
227 | ||
228 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job); | |
2ad5389b SAB |
229 | |
230 | /* If the context is aborted then don't schedule it */ | |
231 | if (m2m_ctx->job_flags & TRANS_ABORT) { | |
232 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); | |
233 | dprintk("Aborted context\n"); | |
234 | return; | |
235 | } | |
236 | ||
7f98639d PO |
237 | if (m2m_ctx->job_flags & TRANS_QUEUED) { |
238 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); | |
239 | dprintk("On job queue already\n"); | |
240 | return; | |
241 | } | |
242 | ||
b730627a | 243 | spin_lock_irqsave(&m2m_ctx->out_q_ctx.rdy_spinlock, flags_out); |
33bdd5a8 PZ |
244 | if (list_empty(&m2m_ctx->out_q_ctx.rdy_queue) |
245 | && !m2m_ctx->out_q_ctx.buffered) { | |
b730627a JS |
246 | spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, |
247 | flags_out); | |
7f98639d PO |
248 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
249 | dprintk("No input buffers available\n"); | |
250 | return; | |
251 | } | |
b730627a | 252 | spin_lock_irqsave(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags_cap); |
33bdd5a8 PZ |
253 | if (list_empty(&m2m_ctx->cap_q_ctx.rdy_queue) |
254 | && !m2m_ctx->cap_q_ctx.buffered) { | |
b730627a JS |
255 | spin_unlock_irqrestore(&m2m_ctx->cap_q_ctx.rdy_spinlock, |
256 | flags_cap); | |
257 | spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, | |
258 | flags_out); | |
7f98639d PO |
259 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
260 | dprintk("No output buffers available\n"); | |
261 | return; | |
262 | } | |
b730627a JS |
263 | spin_unlock_irqrestore(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags_cap); |
264 | spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, flags_out); | |
7f98639d PO |
265 | |
266 | if (m2m_dev->m2m_ops->job_ready | |
267 | && (!m2m_dev->m2m_ops->job_ready(m2m_ctx->priv))) { | |
268 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); | |
269 | dprintk("Driver not ready\n"); | |
270 | return; | |
271 | } | |
272 | ||
273 | list_add_tail(&m2m_ctx->queue, &m2m_dev->job_queue); | |
274 | m2m_ctx->job_flags |= TRANS_QUEUED; | |
275 | ||
276 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); | |
277 | ||
278 | v4l2_m2m_try_run(m2m_dev); | |
279 | } | |
1190a419 | 280 | EXPORT_SYMBOL_GPL(v4l2_m2m_try_schedule); |
7f98639d | 281 | |
fea564a5 SAB |
282 | /** |
283 | * v4l2_m2m_cancel_job() - cancel pending jobs for the context | |
284 | * | |
285 | * In case of streamoff or release called on any context, | |
286 | * 1] If the context is currently running, then abort job will be called | |
287 | * 2] If the context is queued, then the context will be removed from | |
288 | * the job_queue | |
289 | */ | |
290 | static void v4l2_m2m_cancel_job(struct v4l2_m2m_ctx *m2m_ctx) | |
291 | { | |
292 | struct v4l2_m2m_dev *m2m_dev; | |
293 | unsigned long flags; | |
294 | ||
295 | m2m_dev = m2m_ctx->m2m_dev; | |
296 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); | |
2ad5389b SAB |
297 | |
298 | m2m_ctx->job_flags |= TRANS_ABORT; | |
fea564a5 SAB |
299 | if (m2m_ctx->job_flags & TRANS_RUNNING) { |
300 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
301 | m2m_dev->m2m_ops->job_abort(m2m_ctx->priv); | |
302 | dprintk("m2m_ctx %p running, will wait to complete", m2m_ctx); | |
303 | wait_event(m2m_ctx->finished, | |
304 | !(m2m_ctx->job_flags & TRANS_RUNNING)); | |
305 | } else if (m2m_ctx->job_flags & TRANS_QUEUED) { | |
306 | list_del(&m2m_ctx->queue); | |
307 | m2m_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING); | |
308 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
309 | dprintk("m2m_ctx: %p had been on queue and was removed\n", | |
310 | m2m_ctx); | |
311 | } else { | |
312 | /* Do nothing, was not on queue/running */ | |
313 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
314 | } | |
315 | } | |
316 | ||
7f98639d PO |
317 | void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev, |
318 | struct v4l2_m2m_ctx *m2m_ctx) | |
319 | { | |
320 | unsigned long flags; | |
321 | ||
322 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); | |
323 | if (!m2m_dev->curr_ctx || m2m_dev->curr_ctx != m2m_ctx) { | |
324 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
325 | dprintk("Called by an instance not currently running\n"); | |
326 | return; | |
327 | } | |
328 | ||
329 | list_del(&m2m_dev->curr_ctx->queue); | |
330 | m2m_dev->curr_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING); | |
908a0d7c | 331 | wake_up(&m2m_dev->curr_ctx->finished); |
7f98639d PO |
332 | m2m_dev->curr_ctx = NULL; |
333 | ||
334 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); | |
335 | ||
336 | /* This instance might have more buffers ready, but since we do not | |
337 | * allow more than one job on the job_queue per instance, each has | |
338 | * to be scheduled separately after the previous one finishes. */ | |
339 | v4l2_m2m_try_schedule(m2m_ctx); | |
340 | v4l2_m2m_try_run(m2m_dev); | |
341 | } | |
342 | EXPORT_SYMBOL(v4l2_m2m_job_finish); | |
343 | ||
7f98639d PO |
344 | int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
345 | struct v4l2_requestbuffers *reqbufs) | |
346 | { | |
908a0d7c | 347 | struct vb2_queue *vq; |
c13a5ccf | 348 | int ret; |
7f98639d PO |
349 | |
350 | vq = v4l2_m2m_get_vq(m2m_ctx, reqbufs->type); | |
c13a5ccf PZ |
351 | ret = vb2_reqbufs(vq, reqbufs); |
352 | /* If count == 0, then the owner has released all buffers and he | |
353 | is no longer owner of the queue. Otherwise we have an owner. */ | |
354 | if (ret == 0) | |
355 | vq->owner = reqbufs->count ? file->private_data : NULL; | |
356 | ||
357 | return ret; | |
7f98639d PO |
358 | } |
359 | EXPORT_SYMBOL_GPL(v4l2_m2m_reqbufs); | |
360 | ||
7f98639d PO |
361 | int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
362 | struct v4l2_buffer *buf) | |
363 | { | |
908a0d7c MS |
364 | struct vb2_queue *vq; |
365 | int ret = 0; | |
366 | unsigned int i; | |
7f98639d PO |
367 | |
368 | vq = v4l2_m2m_get_vq(m2m_ctx, buf->type); | |
908a0d7c MS |
369 | ret = vb2_querybuf(vq, buf); |
370 | ||
371 | /* Adjust MMAP memory offsets for the CAPTURE queue */ | |
372 | if (buf->memory == V4L2_MEMORY_MMAP && !V4L2_TYPE_IS_OUTPUT(vq->type)) { | |
373 | if (V4L2_TYPE_IS_MULTIPLANAR(vq->type)) { | |
374 | for (i = 0; i < buf->length; ++i) | |
375 | buf->m.planes[i].m.mem_offset | |
376 | += DST_QUEUE_OFF_BASE; | |
377 | } else { | |
378 | buf->m.offset += DST_QUEUE_OFF_BASE; | |
379 | } | |
7f98639d PO |
380 | } |
381 | ||
382 | return ret; | |
383 | } | |
384 | EXPORT_SYMBOL_GPL(v4l2_m2m_querybuf); | |
385 | ||
7f98639d PO |
386 | int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
387 | struct v4l2_buffer *buf) | |
388 | { | |
908a0d7c | 389 | struct vb2_queue *vq; |
7f98639d PO |
390 | int ret; |
391 | ||
392 | vq = v4l2_m2m_get_vq(m2m_ctx, buf->type); | |
908a0d7c | 393 | ret = vb2_qbuf(vq, buf); |
7f98639d PO |
394 | if (!ret) |
395 | v4l2_m2m_try_schedule(m2m_ctx); | |
396 | ||
397 | return ret; | |
398 | } | |
399 | EXPORT_SYMBOL_GPL(v4l2_m2m_qbuf); | |
400 | ||
7f98639d PO |
401 | int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
402 | struct v4l2_buffer *buf) | |
403 | { | |
908a0d7c | 404 | struct vb2_queue *vq; |
7f98639d PO |
405 | |
406 | vq = v4l2_m2m_get_vq(m2m_ctx, buf->type); | |
908a0d7c | 407 | return vb2_dqbuf(vq, buf, file->f_flags & O_NONBLOCK); |
7f98639d PO |
408 | } |
409 | EXPORT_SYMBOL_GPL(v4l2_m2m_dqbuf); | |
410 | ||
e68cf471 HV |
411 | int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
412 | struct v4l2_buffer *buf) | |
413 | { | |
414 | struct vb2_queue *vq; | |
415 | int ret; | |
416 | ||
417 | vq = v4l2_m2m_get_vq(m2m_ctx, buf->type); | |
418 | ret = vb2_prepare_buf(vq, buf); | |
419 | if (!ret) | |
420 | v4l2_m2m_try_schedule(m2m_ctx); | |
421 | ||
422 | return ret; | |
423 | } | |
424 | EXPORT_SYMBOL_GPL(v4l2_m2m_prepare_buf); | |
425 | ||
8b94ca61 PZ |
426 | int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
427 | struct v4l2_create_buffers *create) | |
428 | { | |
429 | struct vb2_queue *vq; | |
430 | ||
431 | vq = v4l2_m2m_get_vq(m2m_ctx, create->format.type); | |
432 | return vb2_create_bufs(vq, create); | |
433 | } | |
434 | EXPORT_SYMBOL_GPL(v4l2_m2m_create_bufs); | |
435 | ||
83ae7c5a TS |
436 | int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
437 | struct v4l2_exportbuffer *eb) | |
438 | { | |
439 | struct vb2_queue *vq; | |
440 | ||
441 | vq = v4l2_m2m_get_vq(m2m_ctx, eb->type); | |
442 | return vb2_expbuf(vq, eb); | |
443 | } | |
444 | EXPORT_SYMBOL_GPL(v4l2_m2m_expbuf); | |
4781646c | 445 | |
7f98639d PO |
446 | int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
447 | enum v4l2_buf_type type) | |
448 | { | |
908a0d7c | 449 | struct vb2_queue *vq; |
7f98639d PO |
450 | int ret; |
451 | ||
452 | vq = v4l2_m2m_get_vq(m2m_ctx, type); | |
908a0d7c | 453 | ret = vb2_streamon(vq, type); |
7f98639d PO |
454 | if (!ret) |
455 | v4l2_m2m_try_schedule(m2m_ctx); | |
456 | ||
457 | return ret; | |
458 | } | |
459 | EXPORT_SYMBOL_GPL(v4l2_m2m_streamon); | |
460 | ||
7f98639d PO |
461 | int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
462 | enum v4l2_buf_type type) | |
463 | { | |
401f6a27 JS |
464 | struct v4l2_m2m_dev *m2m_dev; |
465 | struct v4l2_m2m_queue_ctx *q_ctx; | |
466 | unsigned long flags_job, flags; | |
467 | int ret; | |
7f98639d | 468 | |
fea564a5 SAB |
469 | /* wait until the current context is dequeued from job_queue */ |
470 | v4l2_m2m_cancel_job(m2m_ctx); | |
471 | ||
401f6a27 JS |
472 | q_ctx = get_queue_ctx(m2m_ctx, type); |
473 | ret = vb2_streamoff(&q_ctx->q, type); | |
474 | if (ret) | |
475 | return ret; | |
476 | ||
477 | m2m_dev = m2m_ctx->m2m_dev; | |
478 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job); | |
479 | /* We should not be scheduled anymore, since we're dropping a queue. */ | |
d7bb0ce8 PZ |
480 | if (m2m_ctx->job_flags & TRANS_QUEUED) |
481 | list_del(&m2m_ctx->queue); | |
401f6a27 JS |
482 | m2m_ctx->job_flags = 0; |
483 | ||
484 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); | |
485 | /* Drop queue, since streamoff returns device to the same state as after | |
486 | * calling reqbufs. */ | |
487 | INIT_LIST_HEAD(&q_ctx->rdy_queue); | |
84e68098 | 488 | q_ctx->num_rdy = 0; |
401f6a27 JS |
489 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
490 | ||
491 | if (m2m_dev->curr_ctx == m2m_ctx) { | |
492 | m2m_dev->curr_ctx = NULL; | |
493 | wake_up(&m2m_ctx->finished); | |
494 | } | |
495 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); | |
496 | ||
497 | return 0; | |
7f98639d PO |
498 | } |
499 | EXPORT_SYMBOL_GPL(v4l2_m2m_streamoff); | |
500 | ||
7f98639d PO |
501 | unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
502 | struct poll_table_struct *wait) | |
503 | { | |
08eb8510 HV |
504 | struct video_device *vfd = video_devdata(file); |
505 | unsigned long req_events = poll_requested_events(wait); | |
908a0d7c MS |
506 | struct vb2_queue *src_q, *dst_q; |
507 | struct vb2_buffer *src_vb = NULL, *dst_vb = NULL; | |
7f98639d | 508 | unsigned int rc = 0; |
908a0d7c | 509 | unsigned long flags; |
7f98639d | 510 | |
08eb8510 HV |
511 | if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { |
512 | struct v4l2_fh *fh = file->private_data; | |
513 | ||
514 | if (v4l2_event_pending(fh)) | |
515 | rc = POLLPRI; | |
516 | else if (req_events & POLLPRI) | |
517 | poll_wait(file, &fh->wait, wait); | |
518 | if (!(req_events & (POLLOUT | POLLWRNORM | POLLIN | POLLRDNORM))) | |
519 | return rc; | |
520 | } | |
521 | ||
7f98639d PO |
522 | src_q = v4l2_m2m_get_src_vq(m2m_ctx); |
523 | dst_q = v4l2_m2m_get_dst_vq(m2m_ctx); | |
524 | ||
908a0d7c MS |
525 | /* |
526 | * There has to be at least one buffer queued on each queued_list, which | |
527 | * means either in driver already or waiting for driver to claim it | |
528 | * and start processing. | |
529 | */ | |
530 | if ((!src_q->streaming || list_empty(&src_q->queued_list)) | |
531 | && (!dst_q->streaming || list_empty(&dst_q->queued_list))) { | |
08eb8510 | 532 | rc |= POLLERR; |
7f98639d PO |
533 | goto end; |
534 | } | |
535 | ||
f1a81afc | 536 | spin_lock_irqsave(&src_q->done_lock, flags); |
57183467 SWK |
537 | if (list_empty(&src_q->done_list)) |
538 | poll_wait(file, &src_q->done_wq, wait); | |
f1a81afc ZD |
539 | spin_unlock_irqrestore(&src_q->done_lock, flags); |
540 | ||
541 | spin_lock_irqsave(&dst_q->done_lock, flags); | |
c1621840 PZ |
542 | if (list_empty(&dst_q->done_list)) { |
543 | /* | |
544 | * If the last buffer was dequeued from the capture queue, | |
545 | * return immediately. DQBUF will return -EPIPE. | |
546 | */ | |
f1a81afc ZD |
547 | if (dst_q->last_buffer_dequeued) { |
548 | spin_unlock_irqrestore(&dst_q->done_lock, flags); | |
c1621840 | 549 | return rc | POLLIN | POLLRDNORM; |
f1a81afc | 550 | } |
c1621840 | 551 | |
57183467 | 552 | poll_wait(file, &dst_q->done_wq, wait); |
c1621840 | 553 | } |
f1a81afc | 554 | spin_unlock_irqrestore(&dst_q->done_lock, flags); |
908a0d7c MS |
555 | |
556 | spin_lock_irqsave(&src_q->done_lock, flags); | |
557 | if (!list_empty(&src_q->done_list)) | |
558 | src_vb = list_first_entry(&src_q->done_list, struct vb2_buffer, | |
559 | done_entry); | |
560 | if (src_vb && (src_vb->state == VB2_BUF_STATE_DONE | |
561 | || src_vb->state == VB2_BUF_STATE_ERROR)) | |
562 | rc |= POLLOUT | POLLWRNORM; | |
563 | spin_unlock_irqrestore(&src_q->done_lock, flags); | |
564 | ||
565 | spin_lock_irqsave(&dst_q->done_lock, flags); | |
566 | if (!list_empty(&dst_q->done_list)) | |
567 | dst_vb = list_first_entry(&dst_q->done_list, struct vb2_buffer, | |
568 | done_entry); | |
569 | if (dst_vb && (dst_vb->state == VB2_BUF_STATE_DONE | |
570 | || dst_vb->state == VB2_BUF_STATE_ERROR)) | |
571 | rc |= POLLIN | POLLRDNORM; | |
572 | spin_unlock_irqrestore(&dst_q->done_lock, flags); | |
7f98639d PO |
573 | |
574 | end: | |
7f98639d PO |
575 | return rc; |
576 | } | |
577 | EXPORT_SYMBOL_GPL(v4l2_m2m_poll); | |
578 | ||
7f98639d PO |
579 | int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
580 | struct vm_area_struct *vma) | |
581 | { | |
582 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
908a0d7c | 583 | struct vb2_queue *vq; |
7f98639d PO |
584 | |
585 | if (offset < DST_QUEUE_OFF_BASE) { | |
586 | vq = v4l2_m2m_get_src_vq(m2m_ctx); | |
587 | } else { | |
588 | vq = v4l2_m2m_get_dst_vq(m2m_ctx); | |
589 | vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT); | |
590 | } | |
591 | ||
908a0d7c | 592 | return vb2_mmap(vq, vma); |
7f98639d PO |
593 | } |
594 | EXPORT_SYMBOL(v4l2_m2m_mmap); | |
595 | ||
b1252eb8 | 596 | struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops) |
7f98639d PO |
597 | { |
598 | struct v4l2_m2m_dev *m2m_dev; | |
599 | ||
3fac4eb3 NT |
600 | if (!m2m_ops || WARN_ON(!m2m_ops->device_run) || |
601 | WARN_ON(!m2m_ops->job_abort)) | |
7f98639d PO |
602 | return ERR_PTR(-EINVAL); |
603 | ||
7f98639d PO |
604 | m2m_dev = kzalloc(sizeof *m2m_dev, GFP_KERNEL); |
605 | if (!m2m_dev) | |
606 | return ERR_PTR(-ENOMEM); | |
607 | ||
608 | m2m_dev->curr_ctx = NULL; | |
609 | m2m_dev->m2m_ops = m2m_ops; | |
610 | INIT_LIST_HEAD(&m2m_dev->job_queue); | |
611 | spin_lock_init(&m2m_dev->job_spinlock); | |
612 | ||
613 | return m2m_dev; | |
614 | } | |
615 | EXPORT_SYMBOL_GPL(v4l2_m2m_init); | |
616 | ||
7f98639d PO |
617 | void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev) |
618 | { | |
619 | kfree(m2m_dev); | |
620 | } | |
621 | EXPORT_SYMBOL_GPL(v4l2_m2m_release); | |
622 | ||
908a0d7c MS |
623 | struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(struct v4l2_m2m_dev *m2m_dev, |
624 | void *drv_priv, | |
625 | int (*queue_init)(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)) | |
7f98639d PO |
626 | { |
627 | struct v4l2_m2m_ctx *m2m_ctx; | |
628 | struct v4l2_m2m_queue_ctx *out_q_ctx, *cap_q_ctx; | |
908a0d7c | 629 | int ret; |
7f98639d PO |
630 | |
631 | m2m_ctx = kzalloc(sizeof *m2m_ctx, GFP_KERNEL); | |
632 | if (!m2m_ctx) | |
633 | return ERR_PTR(-ENOMEM); | |
634 | ||
908a0d7c | 635 | m2m_ctx->priv = drv_priv; |
7f98639d | 636 | m2m_ctx->m2m_dev = m2m_dev; |
908a0d7c | 637 | init_waitqueue_head(&m2m_ctx->finished); |
7f98639d | 638 | |
908a0d7c MS |
639 | out_q_ctx = &m2m_ctx->out_q_ctx; |
640 | cap_q_ctx = &m2m_ctx->cap_q_ctx; | |
7f98639d PO |
641 | |
642 | INIT_LIST_HEAD(&out_q_ctx->rdy_queue); | |
643 | INIT_LIST_HEAD(&cap_q_ctx->rdy_queue); | |
908a0d7c MS |
644 | spin_lock_init(&out_q_ctx->rdy_spinlock); |
645 | spin_lock_init(&cap_q_ctx->rdy_spinlock); | |
7f98639d PO |
646 | |
647 | INIT_LIST_HEAD(&m2m_ctx->queue); | |
648 | ||
908a0d7c MS |
649 | ret = queue_init(drv_priv, &out_q_ctx->q, &cap_q_ctx->q); |
650 | ||
651 | if (ret) | |
652 | goto err; | |
8e6e8f93 SN |
653 | /* |
654 | * If both queues use same mutex assign it as the common buffer | |
655 | * queues lock to the m2m context. This lock is used in the | |
656 | * v4l2_m2m_ioctl_* helpers. | |
657 | */ | |
658 | if (out_q_ctx->q.lock == cap_q_ctx->q.lock) | |
659 | m2m_ctx->q_lock = out_q_ctx->q.lock; | |
7f98639d PO |
660 | |
661 | return m2m_ctx; | |
908a0d7c MS |
662 | err: |
663 | kfree(m2m_ctx); | |
664 | return ERR_PTR(ret); | |
7f98639d PO |
665 | } |
666 | EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_init); | |
667 | ||
7f98639d PO |
668 | void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx) |
669 | { | |
fea564a5 SAB |
670 | /* wait until the current context is dequeued from job_queue */ |
671 | v4l2_m2m_cancel_job(m2m_ctx); | |
7f98639d | 672 | |
908a0d7c MS |
673 | vb2_queue_release(&m2m_ctx->cap_q_ctx.q); |
674 | vb2_queue_release(&m2m_ctx->out_q_ctx.q); | |
7f98639d PO |
675 | |
676 | kfree(m2m_ctx); | |
677 | } | |
678 | EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_release); | |
679 | ||
2d700715 JS |
680 | void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, |
681 | struct vb2_v4l2_buffer *vbuf) | |
7f98639d | 682 | { |
2d700715 JS |
683 | struct v4l2_m2m_buffer *b = container_of(vbuf, |
684 | struct v4l2_m2m_buffer, vb); | |
7f98639d | 685 | struct v4l2_m2m_queue_ctx *q_ctx; |
908a0d7c | 686 | unsigned long flags; |
7f98639d | 687 | |
2d700715 | 688 | q_ctx = get_queue_ctx(m2m_ctx, vbuf->vb2_buf.vb2_queue->type); |
7f98639d PO |
689 | if (!q_ctx) |
690 | return; | |
691 | ||
908a0d7c MS |
692 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); |
693 | list_add_tail(&b->list, &q_ctx->rdy_queue); | |
7f98639d | 694 | q_ctx->num_rdy++; |
908a0d7c | 695 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
7f98639d PO |
696 | } |
697 | EXPORT_SYMBOL_GPL(v4l2_m2m_buf_queue); | |
698 | ||
8e6e8f93 SN |
699 | /* Videobuf2 ioctl helpers */ |
700 | ||
701 | int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv, | |
702 | struct v4l2_requestbuffers *rb) | |
703 | { | |
704 | struct v4l2_fh *fh = file->private_data; | |
705 | ||
706 | return v4l2_m2m_reqbufs(file, fh->m2m_ctx, rb); | |
707 | } | |
708 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_reqbufs); | |
709 | ||
710 | int v4l2_m2m_ioctl_create_bufs(struct file *file, void *priv, | |
711 | struct v4l2_create_buffers *create) | |
712 | { | |
713 | struct v4l2_fh *fh = file->private_data; | |
714 | ||
715 | return v4l2_m2m_create_bufs(file, fh->m2m_ctx, create); | |
716 | } | |
717 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_create_bufs); | |
718 | ||
719 | int v4l2_m2m_ioctl_querybuf(struct file *file, void *priv, | |
720 | struct v4l2_buffer *buf) | |
721 | { | |
722 | struct v4l2_fh *fh = file->private_data; | |
723 | ||
724 | return v4l2_m2m_querybuf(file, fh->m2m_ctx, buf); | |
725 | } | |
726 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_querybuf); | |
727 | ||
728 | int v4l2_m2m_ioctl_qbuf(struct file *file, void *priv, | |
729 | struct v4l2_buffer *buf) | |
730 | { | |
731 | struct v4l2_fh *fh = file->private_data; | |
732 | ||
733 | return v4l2_m2m_qbuf(file, fh->m2m_ctx, buf); | |
734 | } | |
735 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_qbuf); | |
736 | ||
737 | int v4l2_m2m_ioctl_dqbuf(struct file *file, void *priv, | |
738 | struct v4l2_buffer *buf) | |
739 | { | |
740 | struct v4l2_fh *fh = file->private_data; | |
741 | ||
742 | return v4l2_m2m_dqbuf(file, fh->m2m_ctx, buf); | |
743 | } | |
744 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_dqbuf); | |
745 | ||
e68cf471 HV |
746 | int v4l2_m2m_ioctl_prepare_buf(struct file *file, void *priv, |
747 | struct v4l2_buffer *buf) | |
748 | { | |
749 | struct v4l2_fh *fh = file->private_data; | |
750 | ||
751 | return v4l2_m2m_prepare_buf(file, fh->m2m_ctx, buf); | |
752 | } | |
753 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_prepare_buf); | |
754 | ||
8e6e8f93 SN |
755 | int v4l2_m2m_ioctl_expbuf(struct file *file, void *priv, |
756 | struct v4l2_exportbuffer *eb) | |
757 | { | |
758 | struct v4l2_fh *fh = file->private_data; | |
759 | ||
760 | return v4l2_m2m_expbuf(file, fh->m2m_ctx, eb); | |
761 | } | |
762 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_expbuf); | |
763 | ||
764 | int v4l2_m2m_ioctl_streamon(struct file *file, void *priv, | |
765 | enum v4l2_buf_type type) | |
766 | { | |
767 | struct v4l2_fh *fh = file->private_data; | |
768 | ||
769 | return v4l2_m2m_streamon(file, fh->m2m_ctx, type); | |
770 | } | |
771 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamon); | |
772 | ||
773 | int v4l2_m2m_ioctl_streamoff(struct file *file, void *priv, | |
774 | enum v4l2_buf_type type) | |
775 | { | |
776 | struct v4l2_fh *fh = file->private_data; | |
777 | ||
778 | return v4l2_m2m_streamoff(file, fh->m2m_ctx, type); | |
779 | } | |
780 | EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamoff); | |
781 | ||
782 | /* | |
783 | * v4l2_file_operations helpers. It is assumed here same lock is used | |
784 | * for the output and the capture buffer queue. | |
785 | */ | |
786 | ||
787 | int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma) | |
788 | { | |
789 | struct v4l2_fh *fh = file->private_data; | |
8e6e8f93 | 790 | |
e752577e | 791 | return v4l2_m2m_mmap(file, fh->m2m_ctx, vma); |
8e6e8f93 SN |
792 | } |
793 | EXPORT_SYMBOL_GPL(v4l2_m2m_fop_mmap); | |
794 | ||
795 | unsigned int v4l2_m2m_fop_poll(struct file *file, poll_table *wait) | |
796 | { | |
797 | struct v4l2_fh *fh = file->private_data; | |
798 | struct v4l2_m2m_ctx *m2m_ctx = fh->m2m_ctx; | |
799 | unsigned int ret; | |
800 | ||
801 | if (m2m_ctx->q_lock) | |
802 | mutex_lock(m2m_ctx->q_lock); | |
803 | ||
804 | ret = v4l2_m2m_poll(file, m2m_ctx, wait); | |
805 | ||
806 | if (m2m_ctx->q_lock) | |
807 | mutex_unlock(m2m_ctx->q_lock); | |
808 | ||
809 | return ret; | |
810 | } | |
811 | EXPORT_SYMBOL_GPL(v4l2_m2m_fop_poll); | |
812 |