Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 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. |
Pawel Osciak | 9507208 | 2011-03-13 15:23:32 -0300 | [diff] [blame] | 8 | * Pawel Osciak, <pawel@osciak.com> |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 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 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 20 | #include <media/videobuf2-core.h> |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 21 | #include <media/v4l2-mem2mem.h> |
Hans Verkuil | 08eb851 | 2012-07-18 10:53:04 -0300 | [diff] [blame] | 22 | #include <media/v4l2-dev.h> |
| 23 | #include <media/v4l2-fh.h> |
| 24 | #include <media/v4l2-event.h> |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 25 | |
| 26 | MODULE_DESCRIPTION("Mem to mem device framework for videobuf"); |
Pawel Osciak | 9507208 | 2011-03-13 15:23:32 -0300 | [diff] [blame] | 27 | MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>"); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 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) |
| 44 | |
| 45 | |
| 46 | /* Offset base for buffers on the destination queue - used to distinguish |
| 47 | * between source and destination buffers when mmapping - they receive the same |
| 48 | * offsets but for different queues */ |
| 49 | #define DST_QUEUE_OFF_BASE (1 << 30) |
| 50 | |
| 51 | |
| 52 | /** |
| 53 | * struct v4l2_m2m_dev - per-device context |
| 54 | * @curr_ctx: currently running instance |
| 55 | * @job_queue: instances queued to run |
| 56 | * @job_spinlock: protects job_queue |
| 57 | * @m2m_ops: driver callbacks |
| 58 | */ |
| 59 | struct v4l2_m2m_dev { |
| 60 | struct v4l2_m2m_ctx *curr_ctx; |
| 61 | |
| 62 | struct list_head job_queue; |
| 63 | spinlock_t job_spinlock; |
| 64 | |
Guennadi Liakhovetski | b1252eb | 2012-09-11 06:32:17 -0300 | [diff] [blame] | 65 | const struct v4l2_m2m_ops *m2m_ops; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | static struct v4l2_m2m_queue_ctx *get_queue_ctx(struct v4l2_m2m_ctx *m2m_ctx, |
| 69 | enum v4l2_buf_type type) |
| 70 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 71 | if (V4L2_TYPE_IS_OUTPUT(type)) |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 72 | return &m2m_ctx->out_q_ctx; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 73 | else |
| 74 | return &m2m_ctx->cap_q_ctx; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | /** |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 78 | * v4l2_m2m_get_vq() - return vb2_queue for the given type |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 79 | */ |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 80 | struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx, |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 81 | enum v4l2_buf_type type) |
| 82 | { |
| 83 | struct v4l2_m2m_queue_ctx *q_ctx; |
| 84 | |
| 85 | q_ctx = get_queue_ctx(m2m_ctx, type); |
| 86 | if (!q_ctx) |
| 87 | return NULL; |
| 88 | |
| 89 | return &q_ctx->q; |
| 90 | } |
| 91 | EXPORT_SYMBOL(v4l2_m2m_get_vq); |
| 92 | |
| 93 | /** |
| 94 | * v4l2_m2m_next_buf() - return next buffer from the list of ready buffers |
| 95 | */ |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 96 | void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx) |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 97 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 98 | struct v4l2_m2m_buffer *b = NULL; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 99 | unsigned long flags; |
| 100 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 101 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 102 | |
Andrzej Pietrasiewicz | a6bd62be | 2011-08-25 07:21:21 -0300 | [diff] [blame] | 103 | if (list_empty(&q_ctx->rdy_queue)) { |
| 104 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
| 105 | return NULL; |
| 106 | } |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 107 | |
Sascha Hauer | c392e9e | 2012-08-31 09:18:03 -0300 | [diff] [blame] | 108 | b = list_first_entry(&q_ctx->rdy_queue, struct v4l2_m2m_buffer, list); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 109 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
| 110 | return &b->vb; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 111 | } |
| 112 | EXPORT_SYMBOL_GPL(v4l2_m2m_next_buf); |
| 113 | |
| 114 | /** |
| 115 | * v4l2_m2m_buf_remove() - take off a buffer from the list of ready buffers and |
| 116 | * return it |
| 117 | */ |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 118 | void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx) |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 119 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 120 | struct v4l2_m2m_buffer *b = NULL; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 121 | unsigned long flags; |
| 122 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 123 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); |
Andrzej Pietrasiewicz | a6bd62be | 2011-08-25 07:21:21 -0300 | [diff] [blame] | 124 | if (list_empty(&q_ctx->rdy_queue)) { |
| 125 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
| 126 | return NULL; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 127 | } |
Sascha Hauer | c392e9e | 2012-08-31 09:18:03 -0300 | [diff] [blame] | 128 | b = list_first_entry(&q_ctx->rdy_queue, struct v4l2_m2m_buffer, list); |
Andrzej Pietrasiewicz | a6bd62be | 2011-08-25 07:21:21 -0300 | [diff] [blame] | 129 | list_del(&b->list); |
| 130 | q_ctx->num_rdy--; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 131 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 132 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 133 | return &b->vb; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 134 | } |
| 135 | EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove); |
| 136 | |
| 137 | /* |
| 138 | * Scheduling handlers |
| 139 | */ |
| 140 | |
| 141 | /** |
| 142 | * v4l2_m2m_get_curr_priv() - return driver private data for the currently |
| 143 | * running instance or NULL if no instance is running |
| 144 | */ |
| 145 | void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev) |
| 146 | { |
| 147 | unsigned long flags; |
| 148 | void *ret = NULL; |
| 149 | |
| 150 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); |
| 151 | if (m2m_dev->curr_ctx) |
| 152 | ret = m2m_dev->curr_ctx->priv; |
| 153 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 154 | |
| 155 | return ret; |
| 156 | } |
| 157 | EXPORT_SYMBOL(v4l2_m2m_get_curr_priv); |
| 158 | |
| 159 | /** |
| 160 | * v4l2_m2m_try_run() - select next job to perform and run it if possible |
| 161 | * |
| 162 | * Get next transaction (if present) from the waiting jobs list and run it. |
| 163 | */ |
| 164 | static void v4l2_m2m_try_run(struct v4l2_m2m_dev *m2m_dev) |
| 165 | { |
| 166 | unsigned long flags; |
| 167 | |
| 168 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); |
| 169 | if (NULL != m2m_dev->curr_ctx) { |
| 170 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 171 | dprintk("Another instance is running, won't run now\n"); |
| 172 | return; |
| 173 | } |
| 174 | |
| 175 | if (list_empty(&m2m_dev->job_queue)) { |
| 176 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 177 | dprintk("No job pending\n"); |
| 178 | return; |
| 179 | } |
| 180 | |
Sascha Hauer | c392e9e | 2012-08-31 09:18:03 -0300 | [diff] [blame] | 181 | m2m_dev->curr_ctx = list_first_entry(&m2m_dev->job_queue, |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 182 | struct v4l2_m2m_ctx, queue); |
| 183 | m2m_dev->curr_ctx->job_flags |= TRANS_RUNNING; |
| 184 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 185 | |
| 186 | m2m_dev->m2m_ops->device_run(m2m_dev->curr_ctx->priv); |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * v4l2_m2m_try_schedule() - check whether an instance is ready to be added to |
| 191 | * the pending job queue and add it if so. |
| 192 | * @m2m_ctx: m2m context assigned to the instance to be checked |
| 193 | * |
| 194 | * There are three basic requirements an instance has to meet to be able to run: |
| 195 | * 1) at least one source buffer has to be queued, |
| 196 | * 2) at least one destination buffer has to be queued, |
| 197 | * 3) streaming has to be on. |
| 198 | * |
Philipp Zabel | 33bdd5a | 2013-06-03 04:23:48 -0300 | [diff] [blame] | 199 | * If a queue is buffered (for example a decoder hardware ringbuffer that has |
| 200 | * to be drained before doing streamoff), allow scheduling without v4l2 buffers |
| 201 | * on that queue. |
| 202 | * |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 203 | * There may also be additional, custom requirements. In such case the driver |
| 204 | * should supply a custom callback (job_ready in v4l2_m2m_ops) that should |
| 205 | * return 1 if the instance is ready. |
| 206 | * An example of the above could be an instance that requires more than one |
| 207 | * src/dst buffer per transaction. |
| 208 | */ |
| 209 | static void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx) |
| 210 | { |
| 211 | struct v4l2_m2m_dev *m2m_dev; |
John Sheu | b730627 | 2013-05-23 20:41:48 -0300 | [diff] [blame] | 212 | unsigned long flags_job, flags_out, flags_cap; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 213 | |
| 214 | m2m_dev = m2m_ctx->m2m_dev; |
| 215 | dprintk("Trying to schedule a job for m2m_ctx: %p\n", m2m_ctx); |
| 216 | |
| 217 | if (!m2m_ctx->out_q_ctx.q.streaming |
| 218 | || !m2m_ctx->cap_q_ctx.q.streaming) { |
| 219 | dprintk("Streaming needs to be on for both queues\n"); |
| 220 | return; |
| 221 | } |
| 222 | |
| 223 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job); |
| 224 | if (m2m_ctx->job_flags & TRANS_QUEUED) { |
| 225 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
| 226 | dprintk("On job queue already\n"); |
| 227 | return; |
| 228 | } |
| 229 | |
John Sheu | b730627 | 2013-05-23 20:41:48 -0300 | [diff] [blame] | 230 | spin_lock_irqsave(&m2m_ctx->out_q_ctx.rdy_spinlock, flags_out); |
Philipp Zabel | 33bdd5a | 2013-06-03 04:23:48 -0300 | [diff] [blame] | 231 | if (list_empty(&m2m_ctx->out_q_ctx.rdy_queue) |
| 232 | && !m2m_ctx->out_q_ctx.buffered) { |
John Sheu | b730627 | 2013-05-23 20:41:48 -0300 | [diff] [blame] | 233 | spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, |
| 234 | flags_out); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 235 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
| 236 | dprintk("No input buffers available\n"); |
| 237 | return; |
| 238 | } |
John Sheu | b730627 | 2013-05-23 20:41:48 -0300 | [diff] [blame] | 239 | spin_lock_irqsave(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags_cap); |
Philipp Zabel | 33bdd5a | 2013-06-03 04:23:48 -0300 | [diff] [blame] | 240 | if (list_empty(&m2m_ctx->cap_q_ctx.rdy_queue) |
| 241 | && !m2m_ctx->cap_q_ctx.buffered) { |
John Sheu | b730627 | 2013-05-23 20:41:48 -0300 | [diff] [blame] | 242 | spin_unlock_irqrestore(&m2m_ctx->cap_q_ctx.rdy_spinlock, |
| 243 | flags_cap); |
| 244 | spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, |
| 245 | flags_out); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 246 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
| 247 | dprintk("No output buffers available\n"); |
| 248 | return; |
| 249 | } |
John Sheu | b730627 | 2013-05-23 20:41:48 -0300 | [diff] [blame] | 250 | spin_unlock_irqrestore(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags_cap); |
| 251 | spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, flags_out); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 252 | |
| 253 | if (m2m_dev->m2m_ops->job_ready |
| 254 | && (!m2m_dev->m2m_ops->job_ready(m2m_ctx->priv))) { |
| 255 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
| 256 | dprintk("Driver not ready\n"); |
| 257 | return; |
| 258 | } |
| 259 | |
| 260 | list_add_tail(&m2m_ctx->queue, &m2m_dev->job_queue); |
| 261 | m2m_ctx->job_flags |= TRANS_QUEUED; |
| 262 | |
| 263 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
| 264 | |
| 265 | v4l2_m2m_try_run(m2m_dev); |
| 266 | } |
| 267 | |
| 268 | /** |
Shaik Ameer Basha | fea564a | 2013-08-13 02:58:07 -0300 | [diff] [blame] | 269 | * v4l2_m2m_cancel_job() - cancel pending jobs for the context |
| 270 | * |
| 271 | * In case of streamoff or release called on any context, |
| 272 | * 1] If the context is currently running, then abort job will be called |
| 273 | * 2] If the context is queued, then the context will be removed from |
| 274 | * the job_queue |
| 275 | */ |
| 276 | static void v4l2_m2m_cancel_job(struct v4l2_m2m_ctx *m2m_ctx) |
| 277 | { |
| 278 | struct v4l2_m2m_dev *m2m_dev; |
| 279 | unsigned long flags; |
| 280 | |
| 281 | m2m_dev = m2m_ctx->m2m_dev; |
| 282 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); |
| 283 | if (m2m_ctx->job_flags & TRANS_RUNNING) { |
| 284 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 285 | m2m_dev->m2m_ops->job_abort(m2m_ctx->priv); |
| 286 | dprintk("m2m_ctx %p running, will wait to complete", m2m_ctx); |
| 287 | wait_event(m2m_ctx->finished, |
| 288 | !(m2m_ctx->job_flags & TRANS_RUNNING)); |
| 289 | } else if (m2m_ctx->job_flags & TRANS_QUEUED) { |
| 290 | list_del(&m2m_ctx->queue); |
| 291 | m2m_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING); |
| 292 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 293 | dprintk("m2m_ctx: %p had been on queue and was removed\n", |
| 294 | m2m_ctx); |
| 295 | } else { |
| 296 | /* Do nothing, was not on queue/running */ |
| 297 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | /** |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 302 | * v4l2_m2m_job_finish() - inform the framework that a job has been finished |
| 303 | * and have it clean up |
| 304 | * |
| 305 | * Called by a driver to yield back the device after it has finished with it. |
| 306 | * Should be called as soon as possible after reaching a state which allows |
| 307 | * other instances to take control of the device. |
| 308 | * |
| 309 | * This function has to be called only after device_run() callback has been |
| 310 | * called on the driver. To prevent recursion, it should not be called directly |
| 311 | * from the device_run() callback though. |
| 312 | */ |
| 313 | void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev, |
| 314 | struct v4l2_m2m_ctx *m2m_ctx) |
| 315 | { |
| 316 | unsigned long flags; |
| 317 | |
| 318 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags); |
| 319 | if (!m2m_dev->curr_ctx || m2m_dev->curr_ctx != m2m_ctx) { |
| 320 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 321 | dprintk("Called by an instance not currently running\n"); |
| 322 | return; |
| 323 | } |
| 324 | |
| 325 | list_del(&m2m_dev->curr_ctx->queue); |
| 326 | m2m_dev->curr_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 327 | wake_up(&m2m_dev->curr_ctx->finished); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 328 | m2m_dev->curr_ctx = NULL; |
| 329 | |
| 330 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags); |
| 331 | |
| 332 | /* This instance might have more buffers ready, but since we do not |
| 333 | * allow more than one job on the job_queue per instance, each has |
| 334 | * to be scheduled separately after the previous one finishes. */ |
| 335 | v4l2_m2m_try_schedule(m2m_ctx); |
| 336 | v4l2_m2m_try_run(m2m_dev); |
| 337 | } |
| 338 | EXPORT_SYMBOL(v4l2_m2m_job_finish); |
| 339 | |
| 340 | /** |
| 341 | * v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer |
| 342 | */ |
| 343 | int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 344 | struct v4l2_requestbuffers *reqbufs) |
| 345 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 346 | struct vb2_queue *vq; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 347 | |
| 348 | vq = v4l2_m2m_get_vq(m2m_ctx, reqbufs->type); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 349 | return vb2_reqbufs(vq, reqbufs); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 350 | } |
| 351 | EXPORT_SYMBOL_GPL(v4l2_m2m_reqbufs); |
| 352 | |
| 353 | /** |
| 354 | * v4l2_m2m_querybuf() - multi-queue-aware QUERYBUF multiplexer |
| 355 | * |
| 356 | * See v4l2_m2m_mmap() documentation for details. |
| 357 | */ |
| 358 | int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 359 | struct v4l2_buffer *buf) |
| 360 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 361 | struct vb2_queue *vq; |
| 362 | int ret = 0; |
| 363 | unsigned int i; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 364 | |
| 365 | vq = v4l2_m2m_get_vq(m2m_ctx, buf->type); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 366 | ret = vb2_querybuf(vq, buf); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 367 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 368 | /* Adjust MMAP memory offsets for the CAPTURE queue */ |
| 369 | if (buf->memory == V4L2_MEMORY_MMAP && !V4L2_TYPE_IS_OUTPUT(vq->type)) { |
| 370 | if (V4L2_TYPE_IS_MULTIPLANAR(vq->type)) { |
| 371 | for (i = 0; i < buf->length; ++i) |
| 372 | buf->m.planes[i].m.mem_offset |
| 373 | += DST_QUEUE_OFF_BASE; |
| 374 | } else { |
| 375 | buf->m.offset += DST_QUEUE_OFF_BASE; |
| 376 | } |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | return ret; |
| 380 | } |
| 381 | EXPORT_SYMBOL_GPL(v4l2_m2m_querybuf); |
| 382 | |
| 383 | /** |
| 384 | * v4l2_m2m_qbuf() - enqueue a source or destination buffer, depending on |
| 385 | * the type |
| 386 | */ |
| 387 | int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 388 | struct v4l2_buffer *buf) |
| 389 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 390 | struct vb2_queue *vq; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 391 | int ret; |
| 392 | |
| 393 | vq = v4l2_m2m_get_vq(m2m_ctx, buf->type); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 394 | ret = vb2_qbuf(vq, buf); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 395 | if (!ret) |
| 396 | v4l2_m2m_try_schedule(m2m_ctx); |
| 397 | |
| 398 | return ret; |
| 399 | } |
| 400 | EXPORT_SYMBOL_GPL(v4l2_m2m_qbuf); |
| 401 | |
| 402 | /** |
| 403 | * v4l2_m2m_dqbuf() - dequeue a source or destination buffer, depending on |
| 404 | * the type |
| 405 | */ |
| 406 | int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 407 | struct v4l2_buffer *buf) |
| 408 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 409 | struct vb2_queue *vq; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 410 | |
| 411 | vq = v4l2_m2m_get_vq(m2m_ctx, buf->type); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 412 | return vb2_dqbuf(vq, buf, file->f_flags & O_NONBLOCK); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 413 | } |
| 414 | EXPORT_SYMBOL_GPL(v4l2_m2m_dqbuf); |
| 415 | |
| 416 | /** |
Philipp Zabel | 8b94ca6 | 2013-05-21 04:16:28 -0300 | [diff] [blame] | 417 | * v4l2_m2m_create_bufs() - create a source or destination buffer, depending |
| 418 | * on the type |
| 419 | */ |
| 420 | int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 421 | struct v4l2_create_buffers *create) |
| 422 | { |
| 423 | struct vb2_queue *vq; |
| 424 | |
| 425 | vq = v4l2_m2m_get_vq(m2m_ctx, create->format.type); |
| 426 | return vb2_create_bufs(vq, create); |
| 427 | } |
| 428 | EXPORT_SYMBOL_GPL(v4l2_m2m_create_bufs); |
| 429 | |
| 430 | /** |
Tomasz Stanislawski | 83ae7c5 | 2012-06-14 11:32:24 -0300 | [diff] [blame] | 431 | * v4l2_m2m_expbuf() - export a source or destination buffer, depending on |
| 432 | * the type |
| 433 | */ |
| 434 | int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 435 | struct v4l2_exportbuffer *eb) |
| 436 | { |
| 437 | struct vb2_queue *vq; |
| 438 | |
| 439 | vq = v4l2_m2m_get_vq(m2m_ctx, eb->type); |
| 440 | return vb2_expbuf(vq, eb); |
| 441 | } |
| 442 | EXPORT_SYMBOL_GPL(v4l2_m2m_expbuf); |
| 443 | /** |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 444 | * v4l2_m2m_streamon() - turn on streaming for a video queue |
| 445 | */ |
| 446 | int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 447 | enum v4l2_buf_type type) |
| 448 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 449 | struct vb2_queue *vq; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 450 | int ret; |
| 451 | |
| 452 | vq = v4l2_m2m_get_vq(m2m_ctx, type); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 453 | ret = vb2_streamon(vq, type); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 454 | if (!ret) |
| 455 | v4l2_m2m_try_schedule(m2m_ctx); |
| 456 | |
| 457 | return ret; |
| 458 | } |
| 459 | EXPORT_SYMBOL_GPL(v4l2_m2m_streamon); |
| 460 | |
| 461 | /** |
| 462 | * v4l2_m2m_streamoff() - turn off streaming for a video queue |
| 463 | */ |
| 464 | int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 465 | enum v4l2_buf_type type) |
| 466 | { |
John Sheu | 401f6a2 | 2013-02-06 20:03:01 -0300 | [diff] [blame] | 467 | struct v4l2_m2m_dev *m2m_dev; |
| 468 | struct v4l2_m2m_queue_ctx *q_ctx; |
| 469 | unsigned long flags_job, flags; |
| 470 | int ret; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 471 | |
Shaik Ameer Basha | fea564a | 2013-08-13 02:58:07 -0300 | [diff] [blame] | 472 | /* wait until the current context is dequeued from job_queue */ |
| 473 | v4l2_m2m_cancel_job(m2m_ctx); |
| 474 | |
John Sheu | 401f6a2 | 2013-02-06 20:03:01 -0300 | [diff] [blame] | 475 | q_ctx = get_queue_ctx(m2m_ctx, type); |
| 476 | ret = vb2_streamoff(&q_ctx->q, type); |
| 477 | if (ret) |
| 478 | return ret; |
| 479 | |
| 480 | m2m_dev = m2m_ctx->m2m_dev; |
| 481 | spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job); |
| 482 | /* We should not be scheduled anymore, since we're dropping a queue. */ |
| 483 | INIT_LIST_HEAD(&m2m_ctx->queue); |
| 484 | m2m_ctx->job_flags = 0; |
| 485 | |
| 486 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); |
| 487 | /* Drop queue, since streamoff returns device to the same state as after |
| 488 | * calling reqbufs. */ |
| 489 | INIT_LIST_HEAD(&q_ctx->rdy_queue); |
| 490 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
| 491 | |
| 492 | if (m2m_dev->curr_ctx == m2m_ctx) { |
| 493 | m2m_dev->curr_ctx = NULL; |
| 494 | wake_up(&m2m_ctx->finished); |
| 495 | } |
| 496 | spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job); |
| 497 | |
| 498 | return 0; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 499 | } |
| 500 | EXPORT_SYMBOL_GPL(v4l2_m2m_streamoff); |
| 501 | |
| 502 | /** |
| 503 | * v4l2_m2m_poll() - poll replacement, for destination buffers only |
| 504 | * |
| 505 | * Call from the driver's poll() function. Will poll both queues. If a buffer |
| 506 | * is available to dequeue (with dqbuf) from the source queue, this will |
| 507 | * indicate that a non-blocking write can be performed, while read will be |
| 508 | * returned in case of the destination queue. |
| 509 | */ |
| 510 | unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 511 | struct poll_table_struct *wait) |
| 512 | { |
Hans Verkuil | 08eb851 | 2012-07-18 10:53:04 -0300 | [diff] [blame] | 513 | struct video_device *vfd = video_devdata(file); |
| 514 | unsigned long req_events = poll_requested_events(wait); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 515 | struct vb2_queue *src_q, *dst_q; |
| 516 | struct vb2_buffer *src_vb = NULL, *dst_vb = NULL; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 517 | unsigned int rc = 0; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 518 | unsigned long flags; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 519 | |
Hans Verkuil | 08eb851 | 2012-07-18 10:53:04 -0300 | [diff] [blame] | 520 | if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { |
| 521 | struct v4l2_fh *fh = file->private_data; |
| 522 | |
| 523 | if (v4l2_event_pending(fh)) |
| 524 | rc = POLLPRI; |
| 525 | else if (req_events & POLLPRI) |
| 526 | poll_wait(file, &fh->wait, wait); |
| 527 | if (!(req_events & (POLLOUT | POLLWRNORM | POLLIN | POLLRDNORM))) |
| 528 | return rc; |
| 529 | } |
| 530 | |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 531 | src_q = v4l2_m2m_get_src_vq(m2m_ctx); |
| 532 | dst_q = v4l2_m2m_get_dst_vq(m2m_ctx); |
| 533 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 534 | /* |
| 535 | * There has to be at least one buffer queued on each queued_list, which |
| 536 | * means either in driver already or waiting for driver to claim it |
| 537 | * and start processing. |
| 538 | */ |
| 539 | if ((!src_q->streaming || list_empty(&src_q->queued_list)) |
| 540 | && (!dst_q->streaming || list_empty(&dst_q->queued_list))) { |
Hans Verkuil | 08eb851 | 2012-07-18 10:53:04 -0300 | [diff] [blame] | 541 | rc |= POLLERR; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 542 | goto end; |
| 543 | } |
| 544 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 545 | if (m2m_ctx->m2m_dev->m2m_ops->unlock) |
| 546 | m2m_ctx->m2m_dev->m2m_ops->unlock(m2m_ctx->priv); |
| 547 | |
Seung-Woo Kim | 5718346 | 2013-05-20 23:47:30 -0300 | [diff] [blame] | 548 | if (list_empty(&src_q->done_list)) |
| 549 | poll_wait(file, &src_q->done_wq, wait); |
| 550 | if (list_empty(&dst_q->done_list)) |
| 551 | poll_wait(file, &dst_q->done_wq, wait); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 552 | |
| 553 | if (m2m_ctx->m2m_dev->m2m_ops->lock) |
| 554 | m2m_ctx->m2m_dev->m2m_ops->lock(m2m_ctx->priv); |
| 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); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 573 | |
| 574 | end: |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 575 | return rc; |
| 576 | } |
| 577 | EXPORT_SYMBOL_GPL(v4l2_m2m_poll); |
| 578 | |
| 579 | /** |
| 580 | * v4l2_m2m_mmap() - source and destination queues-aware mmap multiplexer |
| 581 | * |
| 582 | * Call from driver's mmap() function. Will handle mmap() for both queues |
| 583 | * seamlessly for videobuffer, which will receive normal per-queue offsets and |
| 584 | * proper videobuf queue pointers. The differentiation is made outside videobuf |
| 585 | * by adding a predefined offset to buffers from one of the queues and |
| 586 | * subtracting it before passing it back to videobuf. Only drivers (and |
| 587 | * thus applications) receive modified offsets. |
| 588 | */ |
| 589 | int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
| 590 | struct vm_area_struct *vma) |
| 591 | { |
| 592 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 593 | struct vb2_queue *vq; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 594 | |
| 595 | if (offset < DST_QUEUE_OFF_BASE) { |
| 596 | vq = v4l2_m2m_get_src_vq(m2m_ctx); |
| 597 | } else { |
| 598 | vq = v4l2_m2m_get_dst_vq(m2m_ctx); |
| 599 | vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT); |
| 600 | } |
| 601 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 602 | return vb2_mmap(vq, vma); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 603 | } |
| 604 | EXPORT_SYMBOL(v4l2_m2m_mmap); |
| 605 | |
| 606 | /** |
| 607 | * v4l2_m2m_init() - initialize per-driver m2m data |
| 608 | * |
| 609 | * Usually called from driver's probe() function. |
| 610 | */ |
Guennadi Liakhovetski | b1252eb | 2012-09-11 06:32:17 -0300 | [diff] [blame] | 611 | struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops) |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 612 | { |
| 613 | struct v4l2_m2m_dev *m2m_dev; |
| 614 | |
Nicolas THERY | 3fac4eb | 2012-10-23 04:47:19 -0300 | [diff] [blame] | 615 | if (!m2m_ops || WARN_ON(!m2m_ops->device_run) || |
| 616 | WARN_ON(!m2m_ops->job_abort)) |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 617 | return ERR_PTR(-EINVAL); |
| 618 | |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 619 | m2m_dev = kzalloc(sizeof *m2m_dev, GFP_KERNEL); |
| 620 | if (!m2m_dev) |
| 621 | return ERR_PTR(-ENOMEM); |
| 622 | |
| 623 | m2m_dev->curr_ctx = NULL; |
| 624 | m2m_dev->m2m_ops = m2m_ops; |
| 625 | INIT_LIST_HEAD(&m2m_dev->job_queue); |
| 626 | spin_lock_init(&m2m_dev->job_spinlock); |
| 627 | |
| 628 | return m2m_dev; |
| 629 | } |
| 630 | EXPORT_SYMBOL_GPL(v4l2_m2m_init); |
| 631 | |
| 632 | /** |
| 633 | * v4l2_m2m_release() - cleans up and frees a m2m_dev structure |
| 634 | * |
| 635 | * Usually called from driver's remove() function. |
| 636 | */ |
| 637 | void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev) |
| 638 | { |
| 639 | kfree(m2m_dev); |
| 640 | } |
| 641 | EXPORT_SYMBOL_GPL(v4l2_m2m_release); |
| 642 | |
| 643 | /** |
| 644 | * v4l2_m2m_ctx_init() - allocate and initialize a m2m context |
| 645 | * @priv - driver's instance private data |
| 646 | * @m2m_dev - a previously initialized m2m_dev struct |
| 647 | * @vq_init - a callback for queue type-specific initialization function to be |
| 648 | * used for initializing videobuf_queues |
| 649 | * |
| 650 | * Usually called from driver's open() function. |
| 651 | */ |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 652 | struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(struct v4l2_m2m_dev *m2m_dev, |
| 653 | void *drv_priv, |
| 654 | int (*queue_init)(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)) |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 655 | { |
| 656 | struct v4l2_m2m_ctx *m2m_ctx; |
| 657 | struct v4l2_m2m_queue_ctx *out_q_ctx, *cap_q_ctx; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 658 | int ret; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 659 | |
| 660 | m2m_ctx = kzalloc(sizeof *m2m_ctx, GFP_KERNEL); |
| 661 | if (!m2m_ctx) |
| 662 | return ERR_PTR(-ENOMEM); |
| 663 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 664 | m2m_ctx->priv = drv_priv; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 665 | m2m_ctx->m2m_dev = m2m_dev; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 666 | init_waitqueue_head(&m2m_ctx->finished); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 667 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 668 | out_q_ctx = &m2m_ctx->out_q_ctx; |
| 669 | cap_q_ctx = &m2m_ctx->cap_q_ctx; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 670 | |
| 671 | INIT_LIST_HEAD(&out_q_ctx->rdy_queue); |
| 672 | INIT_LIST_HEAD(&cap_q_ctx->rdy_queue); |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 673 | spin_lock_init(&out_q_ctx->rdy_spinlock); |
| 674 | spin_lock_init(&cap_q_ctx->rdy_spinlock); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 675 | |
| 676 | INIT_LIST_HEAD(&m2m_ctx->queue); |
| 677 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 678 | ret = queue_init(drv_priv, &out_q_ctx->q, &cap_q_ctx->q); |
| 679 | |
| 680 | if (ret) |
| 681 | goto err; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 682 | |
| 683 | return m2m_ctx; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 684 | err: |
| 685 | kfree(m2m_ctx); |
| 686 | return ERR_PTR(ret); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 687 | } |
| 688 | EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_init); |
| 689 | |
| 690 | /** |
| 691 | * v4l2_m2m_ctx_release() - release m2m context |
| 692 | * |
| 693 | * Usually called from driver's release() function. |
| 694 | */ |
| 695 | void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx) |
| 696 | { |
Shaik Ameer Basha | fea564a | 2013-08-13 02:58:07 -0300 | [diff] [blame] | 697 | /* wait until the current context is dequeued from job_queue */ |
| 698 | v4l2_m2m_cancel_job(m2m_ctx); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 699 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 700 | vb2_queue_release(&m2m_ctx->cap_q_ctx.q); |
| 701 | vb2_queue_release(&m2m_ctx->out_q_ctx.q); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 702 | |
| 703 | kfree(m2m_ctx); |
| 704 | } |
| 705 | EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_release); |
| 706 | |
| 707 | /** |
| 708 | * v4l2_m2m_buf_queue() - add a buffer to the proper ready buffers list. |
| 709 | * |
| 710 | * Call from buf_queue(), videobuf_queue_ops callback. |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 711 | */ |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 712 | void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_buffer *vb) |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 713 | { |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 714 | struct v4l2_m2m_buffer *b = container_of(vb, struct v4l2_m2m_buffer, vb); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 715 | struct v4l2_m2m_queue_ctx *q_ctx; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 716 | unsigned long flags; |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 717 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 718 | q_ctx = get_queue_ctx(m2m_ctx, vb->vb2_queue->type); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 719 | if (!q_ctx) |
| 720 | return; |
| 721 | |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 722 | spin_lock_irqsave(&q_ctx->rdy_spinlock, flags); |
| 723 | list_add_tail(&b->list, &q_ctx->rdy_queue); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 724 | q_ctx->num_rdy++; |
Marek Szyprowski | 908a0d7 | 2011-01-12 06:50:24 -0300 | [diff] [blame] | 725 | spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags); |
Pawel Osciak | 7f98639 | 2010-04-23 05:38:37 -0300 | [diff] [blame] | 726 | } |
| 727 | EXPORT_SYMBOL_GPL(v4l2_m2m_buf_queue); |
| 728 | |