Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 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> |
Andrea Righi | 27ac792 | 2008-07-23 21:28:13 -0700 | [diff] [blame] | 19 | #include <linux/mm.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 20 | #include <linux/sched.h> |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 21 | #include <linux/slab.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | |
| 24 | #include <media/videobuf-core.h> |
| 25 | |
| 26 | #define MAGIC_BUFFER 0x20070728 |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 27 | #define MAGIC_CHECK(is, should) \ |
| 28 | do { \ |
| 29 | if (unlikely((is) != (should))) { \ |
| 30 | printk(KERN_ERR \ |
| 31 | "magic mismatch: %x (expected %x)\n", \ |
| 32 | is, should); \ |
| 33 | BUG(); \ |
| 34 | } \ |
| 35 | } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 36 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 37 | static int debug; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 38 | module_param(debug, int, 0644); |
| 39 | |
| 40 | MODULE_DESCRIPTION("helper module to manage video4linux buffers"); |
| 41 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); |
| 42 | MODULE_LICENSE("GPL"); |
| 43 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 44 | #define dprintk(level, fmt, arg...) \ |
| 45 | do { \ |
| 46 | if (debug >= level) \ |
| 47 | printk(KERN_DEBUG "vbuf: " fmt, ## arg); \ |
| 48 | } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 49 | |
| 50 | /* --------------------------------------------------------------------- */ |
| 51 | |
| 52 | #define CALL(q, f, arg...) \ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 53 | ((q->int_ops->f) ? q->int_ops->f(arg) : 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 54 | |
Hans Verkuil | a4cf4ca | 2010-03-28 08:09:44 -0300 | [diff] [blame^] | 55 | struct videobuf_buffer *videobuf_alloc(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 56 | { |
| 57 | struct videobuf_buffer *vb; |
| 58 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 59 | BUG_ON(q->msize < sizeof(*vb)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 60 | |
| 61 | if (!q->int_ops || !q->int_ops->alloc) { |
| 62 | printk(KERN_ERR "No specific ops defined!\n"); |
| 63 | BUG(); |
| 64 | } |
| 65 | |
| 66 | vb = q->int_ops->alloc(q->msize); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 67 | if (NULL != vb) { |
| 68 | init_waitqueue_head(&vb->done); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 69 | vb->magic = MAGIC_BUFFER; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | return vb; |
| 73 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 74 | EXPORT_SYMBOL_GPL(videobuf_alloc); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 75 | |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 76 | #define WAITON_CONDITION (vb->state != VIDEOBUF_ACTIVE &&\ |
| 77 | vb->state != VIDEOBUF_QUEUED) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 78 | int videobuf_waiton(struct videobuf_buffer *vb, int non_blocking, int intr) |
| 79 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 80 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 81 | |
| 82 | if (non_blocking) { |
| 83 | if (WAITON_CONDITION) |
| 84 | return 0; |
| 85 | else |
| 86 | return -EAGAIN; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 87 | } |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 88 | |
| 89 | if (intr) |
| 90 | return wait_event_interruptible(vb->done, WAITON_CONDITION); |
| 91 | else |
| 92 | wait_event(vb->done, WAITON_CONDITION); |
| 93 | |
| 94 | return 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 95 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 96 | EXPORT_SYMBOL_GPL(videobuf_waiton); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 97 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 98 | int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 99 | struct v4l2_framebuffer *fbuf) |
| 100 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 101 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 102 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 103 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 104 | return CALL(q, iolock, q, vb, fbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 105 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 106 | EXPORT_SYMBOL_GPL(videobuf_iolock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 107 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 108 | void *videobuf_queue_to_vmalloc(struct videobuf_queue *q, |
| 109 | struct videobuf_buffer *buf) |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 110 | { |
Harvey Harrison | a6a3a17 | 2008-04-28 16:50:03 -0700 | [diff] [blame] | 111 | if (q->int_ops->vmalloc) |
| 112 | return q->int_ops->vmalloc(buf); |
| 113 | else |
| 114 | return NULL; |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 115 | } |
| 116 | EXPORT_SYMBOL_GPL(videobuf_queue_to_vmalloc); |
| 117 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 118 | /* --------------------------------------------------------------------- */ |
| 119 | |
| 120 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 121 | void videobuf_queue_core_init(struct videobuf_queue *q, |
Jonathan Corbet | 38a54f3 | 2009-11-17 19:43:41 -0300 | [diff] [blame] | 122 | const struct videobuf_queue_ops *ops, |
Guennadi Liakhovetski | e9bcf66 | 2008-04-22 14:46:02 -0300 | [diff] [blame] | 123 | struct device *dev, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 124 | spinlock_t *irqlock, |
| 125 | enum v4l2_buf_type type, |
| 126 | enum v4l2_field field, |
| 127 | unsigned int msize, |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 128 | void *priv, |
| 129 | struct videobuf_qtype_ops *int_ops) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 130 | { |
Figo.zhang | 96ceea2 | 2009-06-02 23:01:04 -0300 | [diff] [blame] | 131 | BUG_ON(!q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 132 | memset(q, 0, sizeof(*q)); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 133 | q->irqlock = irqlock; |
| 134 | q->dev = dev; |
| 135 | q->type = type; |
| 136 | q->field = field; |
| 137 | q->msize = msize; |
| 138 | q->ops = ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 139 | q->priv_data = priv; |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 140 | q->int_ops = int_ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 141 | |
| 142 | /* All buffer operations are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 143 | BUG_ON(!q->ops->buf_setup); |
| 144 | BUG_ON(!q->ops->buf_prepare); |
| 145 | BUG_ON(!q->ops->buf_queue); |
| 146 | BUG_ON(!q->ops->buf_release); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 147 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 148 | /* Lock is mandatory for queue_cancel to work */ |
| 149 | BUG_ON(!irqlock); |
| 150 | |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 151 | /* Having implementations for abstract methods are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 152 | BUG_ON(!q->int_ops); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 153 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 154 | mutex_init(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 155 | init_waitqueue_head(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 156 | INIT_LIST_HEAD(&q->stream); |
| 157 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 158 | EXPORT_SYMBOL_GPL(videobuf_queue_core_init); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 159 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 160 | /* Locking: Only usage in bttv unsafe find way to remove */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 161 | int videobuf_queue_is_busy(struct videobuf_queue *q) |
| 162 | { |
| 163 | int i; |
| 164 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 165 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 166 | |
| 167 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 168 | dprintk(1, "busy: streaming active\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 169 | return 1; |
| 170 | } |
| 171 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 172 | dprintk(1, "busy: pending read #1\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 173 | return 1; |
| 174 | } |
| 175 | if (q->read_buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 176 | dprintk(1, "busy: pending read #2\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 177 | return 1; |
| 178 | } |
| 179 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 180 | if (NULL == q->bufs[i]) |
| 181 | continue; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 182 | if (q->bufs[i]->map) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 183 | dprintk(1, "busy: buffer #%d mapped\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 184 | return 1; |
| 185 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 186 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 187 | dprintk(1, "busy: buffer #%d queued\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 188 | return 1; |
| 189 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 190 | if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 191 | dprintk(1, "busy: buffer #%d avtive\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 192 | return 1; |
| 193 | } |
| 194 | } |
| 195 | return 0; |
| 196 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 197 | EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 198 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 199 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 200 | void videobuf_queue_cancel(struct videobuf_queue *q) |
| 201 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 202 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 203 | int i; |
| 204 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 205 | q->streaming = 0; |
| 206 | q->reading = 0; |
| 207 | wake_up_interruptible_sync(&q->wait); |
| 208 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 209 | /* remove queued buffers from list */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 210 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 211 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 212 | if (NULL == q->bufs[i]) |
| 213 | continue; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 214 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 215 | list_del(&q->bufs[i]->queue); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 216 | q->bufs[i]->state = VIDEOBUF_ERROR; |
Brandon Philips | b608f43 | 2008-04-02 18:10:57 -0300 | [diff] [blame] | 217 | wake_up_all(&q->bufs[i]->done); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 218 | } |
| 219 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 220 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 221 | |
| 222 | /* free all buffers + clear queue */ |
| 223 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 224 | if (NULL == q->bufs[i]) |
| 225 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 226 | q->ops->buf_release(q, q->bufs[i]); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 227 | } |
| 228 | INIT_LIST_HEAD(&q->stream); |
| 229 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 230 | EXPORT_SYMBOL_GPL(videobuf_queue_cancel); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 231 | |
| 232 | /* --------------------------------------------------------------------- */ |
| 233 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 234 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 235 | enum v4l2_field videobuf_next_field(struct videobuf_queue *q) |
| 236 | { |
| 237 | enum v4l2_field field = q->field; |
| 238 | |
| 239 | BUG_ON(V4L2_FIELD_ANY == field); |
| 240 | |
| 241 | if (V4L2_FIELD_ALTERNATE == field) { |
| 242 | if (V4L2_FIELD_TOP == q->last) { |
| 243 | field = V4L2_FIELD_BOTTOM; |
| 244 | q->last = V4L2_FIELD_BOTTOM; |
| 245 | } else { |
| 246 | field = V4L2_FIELD_TOP; |
| 247 | q->last = V4L2_FIELD_TOP; |
| 248 | } |
| 249 | } |
| 250 | return field; |
| 251 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 252 | EXPORT_SYMBOL_GPL(videobuf_next_field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 253 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 254 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 255 | static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, |
| 256 | struct videobuf_buffer *vb, enum v4l2_buf_type type) |
| 257 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 258 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 259 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 260 | |
| 261 | b->index = vb->i; |
| 262 | b->type = type; |
| 263 | |
| 264 | b->memory = vb->memory; |
| 265 | switch (b->memory) { |
| 266 | case V4L2_MEMORY_MMAP: |
| 267 | b->m.offset = vb->boff; |
| 268 | b->length = vb->bsize; |
| 269 | break; |
| 270 | case V4L2_MEMORY_USERPTR: |
| 271 | b->m.userptr = vb->baddr; |
| 272 | b->length = vb->bsize; |
| 273 | break; |
| 274 | case V4L2_MEMORY_OVERLAY: |
| 275 | b->m.offset = vb->boff; |
| 276 | break; |
| 277 | } |
| 278 | |
| 279 | b->flags = 0; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 280 | if (vb->map) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 281 | b->flags |= V4L2_BUF_FLAG_MAPPED; |
| 282 | |
| 283 | switch (vb->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 284 | case VIDEOBUF_PREPARED: |
| 285 | case VIDEOBUF_QUEUED: |
| 286 | case VIDEOBUF_ACTIVE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 287 | b->flags |= V4L2_BUF_FLAG_QUEUED; |
| 288 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 289 | case VIDEOBUF_DONE: |
| 290 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 291 | b->flags |= V4L2_BUF_FLAG_DONE; |
| 292 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 293 | case VIDEOBUF_NEEDS_INIT: |
| 294 | case VIDEOBUF_IDLE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 295 | /* nothing */ |
| 296 | break; |
| 297 | } |
| 298 | |
| 299 | if (vb->input != UNSET) { |
| 300 | b->flags |= V4L2_BUF_FLAG_INPUT; |
| 301 | b->input = vb->input; |
| 302 | } |
| 303 | |
| 304 | b->field = vb->field; |
| 305 | b->timestamp = vb->ts; |
| 306 | b->bytesused = vb->size; |
| 307 | b->sequence = vb->field_count >> 1; |
| 308 | } |
| 309 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 310 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 311 | static int __videobuf_mmap_free(struct videobuf_queue *q) |
| 312 | { |
| 313 | int i; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 314 | |
| 315 | if (!q) |
| 316 | return 0; |
| 317 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 318 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 319 | |
Hans Verkuil | 53aaf07 | 2010-03-28 07:54:29 -0300 | [diff] [blame] | 320 | for (i = 0; i < VIDEO_MAX_FRAME; i++) |
| 321 | if (q->bufs[i] && q->bufs[i]->map) |
| 322 | return -EBUSY; |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 323 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 324 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 325 | if (NULL == q->bufs[i]) |
| 326 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 327 | q->ops->buf_release(q, q->bufs[i]); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 328 | kfree(q->bufs[i]); |
| 329 | q->bufs[i] = NULL; |
| 330 | } |
| 331 | |
Hans Verkuil | 53aaf07 | 2010-03-28 07:54:29 -0300 | [diff] [blame] | 332 | return 0; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | int videobuf_mmap_free(struct videobuf_queue *q) |
| 336 | { |
| 337 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 338 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 339 | ret = __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 340 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 341 | return ret; |
| 342 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 343 | EXPORT_SYMBOL_GPL(videobuf_mmap_free); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 344 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 345 | /* Locking: Caller holds q->vb_lock */ |
Arjan van de Ven | 81b2dbc | 2008-05-20 09:53:52 -0700 | [diff] [blame] | 346 | int __videobuf_mmap_setup(struct videobuf_queue *q, |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 347 | unsigned int bcount, unsigned int bsize, |
| 348 | enum v4l2_memory memory) |
| 349 | { |
| 350 | unsigned int i; |
| 351 | int err; |
| 352 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 353 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 354 | |
| 355 | err = __videobuf_mmap_free(q); |
| 356 | if (0 != err) |
| 357 | return err; |
| 358 | |
| 359 | /* Allocate and initialize buffers */ |
| 360 | for (i = 0; i < bcount; i++) { |
| 361 | q->bufs[i] = videobuf_alloc(q); |
| 362 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 363 | if (NULL == q->bufs[i]) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 364 | break; |
| 365 | |
| 366 | q->bufs[i]->i = i; |
| 367 | q->bufs[i]->input = UNSET; |
| 368 | q->bufs[i]->memory = memory; |
| 369 | q->bufs[i]->bsize = bsize; |
| 370 | switch (memory) { |
| 371 | case V4L2_MEMORY_MMAP: |
Tuukka Toivonen | 7cbefad | 2009-07-23 10:56:25 -0300 | [diff] [blame] | 372 | q->bufs[i]->boff = PAGE_ALIGN(bsize) * i; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 373 | break; |
| 374 | case V4L2_MEMORY_USERPTR: |
| 375 | case V4L2_MEMORY_OVERLAY: |
| 376 | /* nothing */ |
| 377 | break; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | if (!i) |
| 382 | return -ENOMEM; |
| 383 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 384 | dprintk(1, "mmap setup: %d buffers, %d bytes each\n", i, bsize); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 385 | |
| 386 | return i; |
| 387 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 388 | EXPORT_SYMBOL_GPL(__videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 389 | |
| 390 | int videobuf_mmap_setup(struct videobuf_queue *q, |
| 391 | unsigned int bcount, unsigned int bsize, |
| 392 | enum v4l2_memory memory) |
| 393 | { |
| 394 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 395 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 396 | ret = __videobuf_mmap_setup(q, bcount, bsize, memory); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 397 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 398 | return ret; |
| 399 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 400 | EXPORT_SYMBOL_GPL(videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 401 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 402 | int videobuf_reqbufs(struct videobuf_queue *q, |
| 403 | struct v4l2_requestbuffers *req) |
| 404 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 405 | unsigned int size, count; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 406 | int retval; |
| 407 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 408 | if (req->count < 1) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 409 | dprintk(1, "reqbufs: count invalid (%d)\n", req->count); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 410 | return -EINVAL; |
| 411 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 412 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 413 | if (req->memory != V4L2_MEMORY_MMAP && |
| 414 | req->memory != V4L2_MEMORY_USERPTR && |
| 415 | req->memory != V4L2_MEMORY_OVERLAY) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 416 | dprintk(1, "reqbufs: memory type invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 417 | return -EINVAL; |
| 418 | } |
| 419 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 420 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 421 | if (req->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 422 | dprintk(1, "reqbufs: queue type invalid\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 423 | retval = -EINVAL; |
| 424 | goto done; |
| 425 | } |
| 426 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 427 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 428 | dprintk(1, "reqbufs: streaming already exists\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 429 | retval = -EBUSY; |
| 430 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 431 | } |
| 432 | if (!list_empty(&q->stream)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 433 | dprintk(1, "reqbufs: stream running\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 434 | retval = -EBUSY; |
| 435 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 436 | } |
| 437 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 438 | count = req->count; |
| 439 | if (count > VIDEO_MAX_FRAME) |
| 440 | count = VIDEO_MAX_FRAME; |
| 441 | size = 0; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 442 | q->ops->buf_setup(q, &count, &size); |
Márton Németh | 296372e | 2009-11-22 18:03:05 -0300 | [diff] [blame] | 443 | dprintk(1, "reqbufs: bufs=%d, size=0x%x [%u pages total]\n", |
| 444 | count, size, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 445 | (unsigned int)((count * PAGE_ALIGN(size)) >> PAGE_SHIFT)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 446 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 447 | retval = __videobuf_mmap_setup(q, count, size, req->memory); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 448 | if (retval < 0) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 449 | dprintk(1, "reqbufs: mmap setup returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 450 | goto done; |
| 451 | } |
| 452 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 453 | req->count = retval; |
Németh Márton | 925d74a | 2009-04-29 15:57:24 -0300 | [diff] [blame] | 454 | retval = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 455 | |
| 456 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 457 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 458 | return retval; |
| 459 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 460 | EXPORT_SYMBOL_GPL(videobuf_reqbufs); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 461 | |
| 462 | int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
| 463 | { |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 464 | int ret = -EINVAL; |
| 465 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 466 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 467 | if (unlikely(b->type != q->type)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 468 | dprintk(1, "querybuf: Wrong type.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 469 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 470 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 471 | if (unlikely(b->index >= VIDEO_MAX_FRAME)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 472 | dprintk(1, "querybuf: index out of range.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 473 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 474 | } |
| 475 | if (unlikely(NULL == q->bufs[b->index])) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 476 | dprintk(1, "querybuf: buffer is null.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 477 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 478 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 479 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 480 | videobuf_status(q, b, q->bufs[b->index], q->type); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 481 | |
| 482 | ret = 0; |
| 483 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 484 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 485 | return ret; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 486 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 487 | EXPORT_SYMBOL_GPL(videobuf_querybuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 488 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 489 | int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 490 | { |
| 491 | struct videobuf_buffer *buf; |
| 492 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 493 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 494 | int retval; |
| 495 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 496 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 497 | |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 498 | if (b->memory == V4L2_MEMORY_MMAP) |
| 499 | down_read(¤t->mm->mmap_sem); |
| 500 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 501 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 502 | retval = -EBUSY; |
| 503 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 504 | dprintk(1, "qbuf: Reading running...\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 505 | goto done; |
| 506 | } |
| 507 | retval = -EINVAL; |
| 508 | if (b->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 509 | dprintk(1, "qbuf: Wrong type.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 510 | goto done; |
| 511 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 512 | if (b->index >= VIDEO_MAX_FRAME) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 513 | dprintk(1, "qbuf: index out of range.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 514 | goto done; |
| 515 | } |
| 516 | buf = q->bufs[b->index]; |
| 517 | if (NULL == buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 518 | dprintk(1, "qbuf: buffer is null.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 519 | goto done; |
| 520 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 521 | MAGIC_CHECK(buf->magic, MAGIC_BUFFER); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 522 | if (buf->memory != b->memory) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 523 | dprintk(1, "qbuf: memory type is wrong.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 524 | goto done; |
| 525 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 526 | if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 527 | dprintk(1, "qbuf: buffer is already queued or active.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 528 | goto done; |
| 529 | } |
| 530 | |
| 531 | if (b->flags & V4L2_BUF_FLAG_INPUT) { |
| 532 | if (b->input >= q->inputs) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 533 | dprintk(1, "qbuf: wrong input.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 534 | goto done; |
| 535 | } |
| 536 | buf->input = b->input; |
| 537 | } else { |
| 538 | buf->input = UNSET; |
| 539 | } |
| 540 | |
| 541 | switch (b->memory) { |
| 542 | case V4L2_MEMORY_MMAP: |
| 543 | if (0 == buf->baddr) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 544 | dprintk(1, "qbuf: mmap requested " |
| 545 | "but buffer addr is zero!\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 546 | goto done; |
| 547 | } |
| 548 | break; |
| 549 | case V4L2_MEMORY_USERPTR: |
| 550 | if (b->length < buf->bsize) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 551 | dprintk(1, "qbuf: buffer length is not enough\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 552 | goto done; |
| 553 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 554 | if (VIDEOBUF_NEEDS_INIT != buf->state && |
| 555 | buf->baddr != b->m.userptr) |
| 556 | q->ops->buf_release(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 557 | buf->baddr = b->m.userptr; |
| 558 | break; |
| 559 | case V4L2_MEMORY_OVERLAY: |
| 560 | buf->boff = b->m.offset; |
| 561 | break; |
| 562 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 563 | dprintk(1, "qbuf: wrong memory type\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 564 | goto done; |
| 565 | } |
| 566 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 567 | dprintk(1, "qbuf: requesting next field\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 568 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 569 | retval = q->ops->buf_prepare(q, buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 570 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 571 | dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 572 | goto done; |
| 573 | } |
| 574 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 575 | list_add_tail(&buf->stream, &q->stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 576 | if (q->streaming) { |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 577 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 578 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 579 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 580 | } |
Hans Verkuil | 771075b | 2010-03-13 11:47:06 -0300 | [diff] [blame] | 581 | dprintk(1, "qbuf: succeeded\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 582 | retval = 0; |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 583 | wake_up_interruptible_sync(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 584 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 585 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 586 | mutex_unlock(&q->vb_lock); |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 587 | |
| 588 | if (b->memory == V4L2_MEMORY_MMAP) |
| 589 | up_read(¤t->mm->mmap_sem); |
| 590 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 591 | return retval; |
| 592 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 593 | EXPORT_SYMBOL_GPL(videobuf_qbuf); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 594 | |
| 595 | /* Locking: Caller holds q->vb_lock */ |
| 596 | static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock) |
| 597 | { |
| 598 | int retval; |
| 599 | |
| 600 | checks: |
| 601 | if (!q->streaming) { |
| 602 | dprintk(1, "next_buffer: Not streaming\n"); |
| 603 | retval = -EINVAL; |
| 604 | goto done; |
| 605 | } |
| 606 | |
| 607 | if (list_empty(&q->stream)) { |
| 608 | if (noblock) { |
| 609 | retval = -EAGAIN; |
| 610 | dprintk(2, "next_buffer: no buffers to dequeue\n"); |
| 611 | goto done; |
| 612 | } else { |
| 613 | dprintk(2, "next_buffer: waiting on buffer\n"); |
| 614 | |
| 615 | /* Drop lock to avoid deadlock with qbuf */ |
| 616 | mutex_unlock(&q->vb_lock); |
| 617 | |
| 618 | /* Checking list_empty and streaming is safe without |
| 619 | * locks because we goto checks to validate while |
| 620 | * holding locks before proceeding */ |
| 621 | retval = wait_event_interruptible(q->wait, |
| 622 | !list_empty(&q->stream) || !q->streaming); |
| 623 | mutex_lock(&q->vb_lock); |
| 624 | |
| 625 | if (retval) |
| 626 | goto done; |
| 627 | |
| 628 | goto checks; |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | retval = 0; |
| 633 | |
| 634 | done: |
| 635 | return retval; |
| 636 | } |
| 637 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 638 | /* Locking: Caller holds q->vb_lock */ |
| 639 | static int stream_next_buffer(struct videobuf_queue *q, |
| 640 | struct videobuf_buffer **vb, int nonblocking) |
| 641 | { |
| 642 | int retval; |
| 643 | struct videobuf_buffer *buf = NULL; |
| 644 | |
| 645 | retval = stream_next_buffer_check_queue(q, nonblocking); |
| 646 | if (retval) |
| 647 | goto done; |
| 648 | |
| 649 | buf = list_entry(q->stream.next, struct videobuf_buffer, stream); |
| 650 | retval = videobuf_waiton(buf, nonblocking, 1); |
| 651 | if (retval < 0) |
| 652 | goto done; |
| 653 | |
| 654 | *vb = buf; |
| 655 | done: |
| 656 | return retval; |
| 657 | } |
| 658 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 659 | int videobuf_dqbuf(struct videobuf_queue *q, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 660 | struct v4l2_buffer *b, int nonblocking) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 661 | { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 662 | struct videobuf_buffer *buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 663 | int retval; |
| 664 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 665 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 666 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 667 | mutex_lock(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 668 | |
| 669 | retval = stream_next_buffer(q, &buf, nonblocking); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 670 | if (retval < 0) { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 671 | dprintk(1, "dqbuf: next_buffer error: %i\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 672 | goto done; |
| 673 | } |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 674 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 675 | switch (buf->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 676 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 677 | dprintk(1, "dqbuf: state is error\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 678 | retval = -EIO; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 679 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 680 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 681 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 682 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 683 | dprintk(1, "dqbuf: state is done\n"); |
| 684 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 685 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 686 | break; |
| 687 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 688 | dprintk(1, "dqbuf: state invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 689 | retval = -EINVAL; |
| 690 | goto done; |
| 691 | } |
| 692 | list_del(&buf->stream); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 693 | memset(b, 0, sizeof(*b)); |
| 694 | videobuf_status(q, b, buf, q->type); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 695 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 696 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 697 | return retval; |
| 698 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 699 | EXPORT_SYMBOL_GPL(videobuf_dqbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 700 | |
| 701 | int videobuf_streamon(struct videobuf_queue *q) |
| 702 | { |
| 703 | struct videobuf_buffer *buf; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 704 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 705 | int retval; |
| 706 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 707 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 708 | retval = -EBUSY; |
| 709 | if (q->reading) |
| 710 | goto done; |
| 711 | retval = 0; |
| 712 | if (q->streaming) |
| 713 | goto done; |
| 714 | q->streaming = 1; |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 715 | spin_lock_irqsave(q->irqlock, flags); |
Trent Piepho | a991f44 | 2007-10-10 05:37:43 -0300 | [diff] [blame] | 716 | list_for_each_entry(buf, &q->stream, stream) |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 717 | if (buf->state == VIDEOBUF_PREPARED) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 718 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 719 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 720 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 721 | wake_up_interruptible_sync(&q->wait); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 722 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 723 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 724 | return retval; |
| 725 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 726 | EXPORT_SYMBOL_GPL(videobuf_streamon); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 727 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 728 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 729 | static int __videobuf_streamoff(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 730 | { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 731 | if (!q->streaming) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 732 | return -EINVAL; |
| 733 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 734 | videobuf_queue_cancel(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 735 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 736 | return 0; |
| 737 | } |
| 738 | |
| 739 | int videobuf_streamoff(struct videobuf_queue *q) |
| 740 | { |
| 741 | int retval; |
| 742 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 743 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 744 | retval = __videobuf_streamoff(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 745 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 746 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 747 | return retval; |
| 748 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 749 | EXPORT_SYMBOL_GPL(videobuf_streamoff); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 750 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 751 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 752 | static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, |
| 753 | char __user *data, |
| 754 | size_t count, loff_t *ppos) |
| 755 | { |
| 756 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 757 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 758 | int retval; |
| 759 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 760 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 761 | |
| 762 | /* setup stuff */ |
| 763 | q->read_buf = videobuf_alloc(q); |
| 764 | if (NULL == q->read_buf) |
| 765 | return -ENOMEM; |
| 766 | |
| 767 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 768 | q->read_buf->baddr = (unsigned long)data; |
| 769 | q->read_buf->bsize = count; |
| 770 | |
| 771 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 772 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 773 | if (0 != retval) |
| 774 | goto done; |
| 775 | |
| 776 | /* start capture & wait */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 777 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 778 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 779 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 780 | retval = videobuf_waiton(q->read_buf, 0, 0); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 781 | if (0 == retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 782 | CALL(q, sync, q, q->read_buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 783 | if (VIDEOBUF_ERROR == q->read_buf->state) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 784 | retval = -EIO; |
| 785 | else |
| 786 | retval = q->read_buf->size; |
| 787 | } |
| 788 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 789 | done: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 790 | /* cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 791 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 792 | kfree(q->read_buf); |
| 793 | q->read_buf = NULL; |
| 794 | return retval; |
| 795 | } |
| 796 | |
| 797 | ssize_t videobuf_read_one(struct videobuf_queue *q, |
| 798 | char __user *data, size_t count, loff_t *ppos, |
| 799 | int nonblocking) |
| 800 | { |
| 801 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 802 | unsigned long flags = 0; |
Guennadi Liakhovetski | 7daa4a8 | 2008-04-22 14:46:03 -0300 | [diff] [blame] | 803 | unsigned size = 0, nbufs = 1; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 804 | int retval; |
| 805 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 806 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 807 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 808 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 809 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 810 | q->ops->buf_setup(q, &nbufs, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 811 | |
| 812 | if (NULL == q->read_buf && |
| 813 | count >= size && |
| 814 | !nonblocking) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 815 | retval = videobuf_read_zerocopy(q, data, count, ppos); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 816 | if (retval >= 0 || retval == -EIO) |
| 817 | /* ok, all done */ |
| 818 | goto done; |
| 819 | /* fallback to kernel bounce buffer on failures */ |
| 820 | } |
| 821 | |
| 822 | if (NULL == q->read_buf) { |
| 823 | /* need to capture a new frame */ |
| 824 | retval = -ENOMEM; |
| 825 | q->read_buf = videobuf_alloc(q); |
| 826 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 827 | dprintk(1, "video alloc=0x%p\n", q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 828 | if (NULL == q->read_buf) |
| 829 | goto done; |
| 830 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 831 | q->read_buf->bsize = count; /* preferred size */ |
| 832 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 833 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 834 | |
| 835 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 836 | kfree(q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 837 | q->read_buf = NULL; |
| 838 | goto done; |
| 839 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 840 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 841 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 842 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 843 | spin_unlock_irqrestore(q->irqlock, flags); |
| 844 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 845 | q->read_off = 0; |
| 846 | } |
| 847 | |
| 848 | /* wait until capture is done */ |
| 849 | retval = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 850 | if (0 != retval) |
| 851 | goto done; |
| 852 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 853 | CALL(q, sync, q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 854 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 855 | if (VIDEOBUF_ERROR == q->read_buf->state) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 856 | /* catch I/O errors */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 857 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 858 | kfree(q->read_buf); |
| 859 | q->read_buf = NULL; |
| 860 | retval = -EIO; |
| 861 | goto done; |
| 862 | } |
| 863 | |
| 864 | /* Copy to userspace */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 865 | retval = CALL(q, video_copy_to_user, q, data, count, nonblocking); |
| 866 | if (retval < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 867 | goto done; |
| 868 | |
| 869 | q->read_off += retval; |
| 870 | if (q->read_off == q->read_buf->size) { |
| 871 | /* all data copied, cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 872 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 873 | kfree(q->read_buf); |
| 874 | q->read_buf = NULL; |
| 875 | } |
| 876 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 877 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 878 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 879 | return retval; |
| 880 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 881 | EXPORT_SYMBOL_GPL(videobuf_read_one); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 882 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 883 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 225ba90 | 2007-12-12 21:46:26 -0300 | [diff] [blame] | 884 | static int __videobuf_read_start(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 885 | { |
| 886 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 887 | unsigned long flags = 0; |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 888 | unsigned int count = 0, size = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 889 | int err, i; |
| 890 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 891 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 892 | if (count < 2) |
| 893 | count = 2; |
| 894 | if (count > VIDEO_MAX_FRAME) |
| 895 | count = VIDEO_MAX_FRAME; |
| 896 | size = PAGE_ALIGN(size); |
| 897 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 898 | err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 899 | if (err < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 900 | return err; |
| 901 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 902 | count = err; |
| 903 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 904 | for (i = 0; i < count; i++) { |
| 905 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 906 | err = q->ops->buf_prepare(q, q->bufs[i], field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 907 | if (err) |
| 908 | return err; |
| 909 | list_add_tail(&q->bufs[i]->stream, &q->stream); |
| 910 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 911 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 912 | for (i = 0; i < count; i++) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 913 | q->ops->buf_queue(q, q->bufs[i]); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 914 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 915 | q->reading = 1; |
| 916 | return 0; |
| 917 | } |
| 918 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 919 | static void __videobuf_read_stop(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 920 | { |
| 921 | int i; |
| 922 | |
| 923 | videobuf_queue_cancel(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 924 | __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 925 | INIT_LIST_HEAD(&q->stream); |
| 926 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 927 | if (NULL == q->bufs[i]) |
| 928 | continue; |
| 929 | kfree(q->bufs[i]); |
| 930 | q->bufs[i] = NULL; |
| 931 | } |
| 932 | q->read_buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 933 | } |
| 934 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 935 | int videobuf_read_start(struct videobuf_queue *q) |
| 936 | { |
| 937 | int rc; |
| 938 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 939 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 940 | rc = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 941 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 942 | |
| 943 | return rc; |
| 944 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 945 | EXPORT_SYMBOL_GPL(videobuf_read_start); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 946 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 947 | void videobuf_read_stop(struct videobuf_queue *q) |
| 948 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 949 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 950 | __videobuf_read_stop(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 951 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 952 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 953 | EXPORT_SYMBOL_GPL(videobuf_read_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 954 | |
| 955 | void videobuf_stop(struct videobuf_queue *q) |
| 956 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 957 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 958 | |
| 959 | if (q->streaming) |
| 960 | __videobuf_streamoff(q); |
| 961 | |
| 962 | if (q->reading) |
| 963 | __videobuf_read_stop(q); |
| 964 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 965 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 966 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 967 | EXPORT_SYMBOL_GPL(videobuf_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 968 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 969 | ssize_t videobuf_read_stream(struct videobuf_queue *q, |
| 970 | char __user *data, size_t count, loff_t *ppos, |
| 971 | int vbihack, int nonblocking) |
| 972 | { |
| 973 | int rc, retval; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 974 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 975 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 976 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 977 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 978 | dprintk(2, "%s\n", __func__); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 979 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 980 | retval = -EBUSY; |
| 981 | if (q->streaming) |
| 982 | goto done; |
| 983 | if (!q->reading) { |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 984 | retval = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 985 | if (retval < 0) |
| 986 | goto done; |
| 987 | } |
| 988 | |
| 989 | retval = 0; |
| 990 | while (count > 0) { |
| 991 | /* get / wait for data */ |
| 992 | if (NULL == q->read_buf) { |
| 993 | q->read_buf = list_entry(q->stream.next, |
| 994 | struct videobuf_buffer, |
| 995 | stream); |
| 996 | list_del(&q->read_buf->stream); |
| 997 | q->read_off = 0; |
| 998 | } |
| 999 | rc = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 1000 | if (rc < 0) { |
| 1001 | if (0 == retval) |
| 1002 | retval = rc; |
| 1003 | break; |
| 1004 | } |
| 1005 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1006 | if (q->read_buf->state == VIDEOBUF_DONE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1007 | rc = CALL(q, copy_stream, q, data + retval, count, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1008 | retval, vbihack, nonblocking); |
| 1009 | if (rc < 0) { |
| 1010 | retval = rc; |
| 1011 | break; |
| 1012 | } |
| 1013 | retval += rc; |
| 1014 | count -= rc; |
| 1015 | q->read_off += rc; |
| 1016 | } else { |
| 1017 | /* some error */ |
| 1018 | q->read_off = q->read_buf->size; |
| 1019 | if (0 == retval) |
| 1020 | retval = -EIO; |
| 1021 | } |
| 1022 | |
| 1023 | /* requeue buffer when done with copying */ |
| 1024 | if (q->read_off == q->read_buf->size) { |
| 1025 | list_add_tail(&q->read_buf->stream, |
| 1026 | &q->stream); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1027 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1028 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1029 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1030 | q->read_buf = NULL; |
| 1031 | } |
| 1032 | if (retval < 0) |
| 1033 | break; |
| 1034 | } |
| 1035 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1036 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1037 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1038 | return retval; |
| 1039 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1040 | EXPORT_SYMBOL_GPL(videobuf_read_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1041 | |
| 1042 | unsigned int videobuf_poll_stream(struct file *file, |
| 1043 | struct videobuf_queue *q, |
| 1044 | poll_table *wait) |
| 1045 | { |
| 1046 | struct videobuf_buffer *buf = NULL; |
| 1047 | unsigned int rc = 0; |
| 1048 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1049 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1050 | if (q->streaming) { |
| 1051 | if (!list_empty(&q->stream)) |
| 1052 | buf = list_entry(q->stream.next, |
| 1053 | struct videobuf_buffer, stream); |
| 1054 | } else { |
| 1055 | if (!q->reading) |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 1056 | __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1057 | if (!q->reading) { |
| 1058 | rc = POLLERR; |
| 1059 | } else if (NULL == q->read_buf) { |
| 1060 | q->read_buf = list_entry(q->stream.next, |
| 1061 | struct videobuf_buffer, |
| 1062 | stream); |
| 1063 | list_del(&q->read_buf->stream); |
| 1064 | q->read_off = 0; |
| 1065 | } |
| 1066 | buf = q->read_buf; |
| 1067 | } |
| 1068 | if (!buf) |
| 1069 | rc = POLLERR; |
| 1070 | |
| 1071 | if (0 == rc) { |
| 1072 | poll_wait(file, &buf->done, wait); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1073 | if (buf->state == VIDEOBUF_DONE || |
| 1074 | buf->state == VIDEOBUF_ERROR) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1075 | rc = POLLIN|POLLRDNORM; |
| 1076 | } |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1077 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1078 | return rc; |
| 1079 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1080 | EXPORT_SYMBOL_GPL(videobuf_poll_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1081 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1082 | int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1083 | { |
| 1084 | int retval; |
| 1085 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1086 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1087 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1088 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1089 | retval = CALL(q, mmap_mapper, q, vma); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1090 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1091 | |
| 1092 | return retval; |
| 1093 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1094 | EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1095 | |
| 1096 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
| 1097 | int videobuf_cgmbuf(struct videobuf_queue *q, |
| 1098 | struct video_mbuf *mbuf, int count) |
| 1099 | { |
| 1100 | struct v4l2_requestbuffers req; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1101 | int rc, i; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1102 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1103 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1104 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1105 | memset(&req, 0, sizeof(req)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1106 | req.type = q->type; |
| 1107 | req.count = count; |
| 1108 | req.memory = V4L2_MEMORY_MMAP; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1109 | rc = videobuf_reqbufs(q, &req); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1110 | if (rc < 0) |
| 1111 | return rc; |
| 1112 | |
| 1113 | mbuf->frames = req.count; |
| 1114 | mbuf->size = 0; |
| 1115 | for (i = 0; i < mbuf->frames; i++) { |
| 1116 | mbuf->offsets[i] = q->bufs[i]->boff; |
Tuukka Toivonen | 7cbefad | 2009-07-23 10:56:25 -0300 | [diff] [blame] | 1117 | mbuf->size += PAGE_ALIGN(q->bufs[i]->bsize); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1118 | } |
| 1119 | |
| 1120 | return 0; |
| 1121 | } |
Pekka Enberg | a13625c | 2007-10-13 05:54:54 -0300 | [diff] [blame] | 1122 | EXPORT_SYMBOL_GPL(videobuf_cgmbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1123 | #endif |
| 1124 | |