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 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 55 | void *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; |
| 314 | int rc; |
| 315 | |
| 316 | if (!q) |
| 317 | return 0; |
| 318 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 319 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 320 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 321 | rc = CALL(q, mmap_free, q); |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 322 | |
| 323 | q->is_mmapped = 0; |
| 324 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 325 | if (rc < 0) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 326 | return rc; |
| 327 | |
| 328 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 329 | if (NULL == q->bufs[i]) |
| 330 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 331 | q->ops->buf_release(q, q->bufs[i]); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 332 | kfree(q->bufs[i]); |
| 333 | q->bufs[i] = NULL; |
| 334 | } |
| 335 | |
| 336 | return rc; |
| 337 | } |
| 338 | |
| 339 | int videobuf_mmap_free(struct videobuf_queue *q) |
| 340 | { |
| 341 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 342 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 343 | ret = __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 344 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 345 | return ret; |
| 346 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 347 | EXPORT_SYMBOL_GPL(videobuf_mmap_free); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 348 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 349 | /* Locking: Caller holds q->vb_lock */ |
Arjan van de Ven | 81b2dbc | 2008-05-20 09:53:52 -0700 | [diff] [blame] | 350 | int __videobuf_mmap_setup(struct videobuf_queue *q, |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 351 | unsigned int bcount, unsigned int bsize, |
| 352 | enum v4l2_memory memory) |
| 353 | { |
| 354 | unsigned int i; |
| 355 | int err; |
| 356 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 357 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 358 | |
| 359 | err = __videobuf_mmap_free(q); |
| 360 | if (0 != err) |
| 361 | return err; |
| 362 | |
| 363 | /* Allocate and initialize buffers */ |
| 364 | for (i = 0; i < bcount; i++) { |
| 365 | q->bufs[i] = videobuf_alloc(q); |
| 366 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 367 | if (NULL == q->bufs[i]) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 368 | break; |
| 369 | |
| 370 | q->bufs[i]->i = i; |
| 371 | q->bufs[i]->input = UNSET; |
| 372 | q->bufs[i]->memory = memory; |
| 373 | q->bufs[i]->bsize = bsize; |
| 374 | switch (memory) { |
| 375 | case V4L2_MEMORY_MMAP: |
Tuukka Toivonen | 7cbefad | 2009-07-23 10:56:25 -0300 | [diff] [blame] | 376 | q->bufs[i]->boff = PAGE_ALIGN(bsize) * i; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 377 | break; |
| 378 | case V4L2_MEMORY_USERPTR: |
| 379 | case V4L2_MEMORY_OVERLAY: |
| 380 | /* nothing */ |
| 381 | break; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | if (!i) |
| 386 | return -ENOMEM; |
| 387 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 388 | dprintk(1, "mmap setup: %d buffers, %d bytes each\n", i, bsize); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 389 | |
| 390 | return i; |
| 391 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 392 | EXPORT_SYMBOL_GPL(__videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 393 | |
| 394 | int videobuf_mmap_setup(struct videobuf_queue *q, |
| 395 | unsigned int bcount, unsigned int bsize, |
| 396 | enum v4l2_memory memory) |
| 397 | { |
| 398 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 399 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 400 | ret = __videobuf_mmap_setup(q, bcount, bsize, memory); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 401 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 402 | return ret; |
| 403 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 404 | EXPORT_SYMBOL_GPL(videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 405 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 406 | int videobuf_reqbufs(struct videobuf_queue *q, |
| 407 | struct v4l2_requestbuffers *req) |
| 408 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 409 | unsigned int size, count; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 410 | int retval; |
| 411 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 412 | if (req->count < 1) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 413 | dprintk(1, "reqbufs: count invalid (%d)\n", req->count); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 414 | return -EINVAL; |
| 415 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 416 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 417 | if (req->memory != V4L2_MEMORY_MMAP && |
| 418 | req->memory != V4L2_MEMORY_USERPTR && |
| 419 | req->memory != V4L2_MEMORY_OVERLAY) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 420 | dprintk(1, "reqbufs: memory type invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 421 | return -EINVAL; |
| 422 | } |
| 423 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 424 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 425 | if (req->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 426 | dprintk(1, "reqbufs: queue type invalid\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 427 | retval = -EINVAL; |
| 428 | goto done; |
| 429 | } |
| 430 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 431 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 432 | dprintk(1, "reqbufs: streaming already exists\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 433 | retval = -EBUSY; |
| 434 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 435 | } |
| 436 | if (!list_empty(&q->stream)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 437 | dprintk(1, "reqbufs: stream running\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 438 | retval = -EBUSY; |
| 439 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 440 | } |
| 441 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 442 | count = req->count; |
| 443 | if (count > VIDEO_MAX_FRAME) |
| 444 | count = VIDEO_MAX_FRAME; |
| 445 | size = 0; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 446 | q->ops->buf_setup(q, &count, &size); |
Márton Németh | 296372e | 2009-11-22 18:03:05 -0300 | [diff] [blame] | 447 | dprintk(1, "reqbufs: bufs=%d, size=0x%x [%u pages total]\n", |
| 448 | count, size, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 449 | (unsigned int)((count * PAGE_ALIGN(size)) >> PAGE_SHIFT)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 450 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 451 | retval = __videobuf_mmap_setup(q, count, size, req->memory); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 452 | if (retval < 0) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 453 | dprintk(1, "reqbufs: mmap setup returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 454 | goto done; |
| 455 | } |
| 456 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 457 | req->count = retval; |
Németh Márton | 925d74a | 2009-04-29 15:57:24 -0300 | [diff] [blame] | 458 | retval = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 459 | |
| 460 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 461 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 462 | return retval; |
| 463 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 464 | EXPORT_SYMBOL_GPL(videobuf_reqbufs); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 465 | |
| 466 | int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
| 467 | { |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 468 | int ret = -EINVAL; |
| 469 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 470 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 471 | if (unlikely(b->type != q->type)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 472 | dprintk(1, "querybuf: Wrong type.\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 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 475 | if (unlikely(b->index >= VIDEO_MAX_FRAME)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 476 | dprintk(1, "querybuf: index out of range.\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 | } |
| 479 | if (unlikely(NULL == q->bufs[b->index])) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 480 | dprintk(1, "querybuf: buffer is null.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 481 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 482 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 483 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 484 | videobuf_status(q, b, q->bufs[b->index], q->type); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 485 | |
| 486 | ret = 0; |
| 487 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 488 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 489 | return ret; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 490 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 491 | EXPORT_SYMBOL_GPL(videobuf_querybuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 492 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 493 | int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 494 | { |
| 495 | struct videobuf_buffer *buf; |
| 496 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 497 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 498 | int retval; |
| 499 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 500 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 501 | |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 502 | if (b->memory == V4L2_MEMORY_MMAP) |
| 503 | down_read(¤t->mm->mmap_sem); |
| 504 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 505 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 506 | retval = -EBUSY; |
| 507 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 508 | dprintk(1, "qbuf: Reading running...\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 509 | goto done; |
| 510 | } |
| 511 | retval = -EINVAL; |
| 512 | if (b->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 513 | dprintk(1, "qbuf: Wrong type.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 514 | goto done; |
| 515 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 516 | if (b->index >= VIDEO_MAX_FRAME) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 517 | dprintk(1, "qbuf: index out of range.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 518 | goto done; |
| 519 | } |
| 520 | buf = q->bufs[b->index]; |
| 521 | if (NULL == buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 522 | dprintk(1, "qbuf: buffer is null.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 523 | goto done; |
| 524 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 525 | MAGIC_CHECK(buf->magic, MAGIC_BUFFER); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 526 | if (buf->memory != b->memory) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 527 | dprintk(1, "qbuf: memory type is wrong.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 528 | goto done; |
| 529 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 530 | if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 531 | dprintk(1, "qbuf: buffer is already queued or active.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 532 | goto done; |
| 533 | } |
| 534 | |
| 535 | if (b->flags & V4L2_BUF_FLAG_INPUT) { |
| 536 | if (b->input >= q->inputs) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 537 | dprintk(1, "qbuf: wrong input.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 538 | goto done; |
| 539 | } |
| 540 | buf->input = b->input; |
| 541 | } else { |
| 542 | buf->input = UNSET; |
| 543 | } |
| 544 | |
| 545 | switch (b->memory) { |
| 546 | case V4L2_MEMORY_MMAP: |
| 547 | if (0 == buf->baddr) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 548 | dprintk(1, "qbuf: mmap requested " |
| 549 | "but buffer addr is zero!\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 550 | goto done; |
| 551 | } |
| 552 | break; |
| 553 | case V4L2_MEMORY_USERPTR: |
| 554 | if (b->length < buf->bsize) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 555 | dprintk(1, "qbuf: buffer length is not enough\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 556 | goto done; |
| 557 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 558 | if (VIDEOBUF_NEEDS_INIT != buf->state && |
| 559 | buf->baddr != b->m.userptr) |
| 560 | q->ops->buf_release(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 561 | buf->baddr = b->m.userptr; |
| 562 | break; |
| 563 | case V4L2_MEMORY_OVERLAY: |
| 564 | buf->boff = b->m.offset; |
| 565 | break; |
| 566 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 567 | dprintk(1, "qbuf: wrong memory type\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 568 | goto done; |
| 569 | } |
| 570 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 571 | dprintk(1, "qbuf: requesting next field\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 572 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 573 | retval = q->ops->buf_prepare(q, buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 574 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 575 | dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 576 | goto done; |
| 577 | } |
| 578 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 579 | list_add_tail(&buf->stream, &q->stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 580 | if (q->streaming) { |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 581 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 582 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 583 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 584 | } |
Hans Verkuil | 771075b | 2010-03-13 11:47:06 -0300 | [diff] [blame] | 585 | dprintk(1, "qbuf: succeeded\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 586 | retval = 0; |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 587 | wake_up_interruptible_sync(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 588 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 589 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 590 | mutex_unlock(&q->vb_lock); |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 591 | |
| 592 | if (b->memory == V4L2_MEMORY_MMAP) |
| 593 | up_read(¤t->mm->mmap_sem); |
| 594 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 595 | return retval; |
| 596 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 597 | EXPORT_SYMBOL_GPL(videobuf_qbuf); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 598 | |
| 599 | /* Locking: Caller holds q->vb_lock */ |
| 600 | static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock) |
| 601 | { |
| 602 | int retval; |
| 603 | |
| 604 | checks: |
| 605 | if (!q->streaming) { |
| 606 | dprintk(1, "next_buffer: Not streaming\n"); |
| 607 | retval = -EINVAL; |
| 608 | goto done; |
| 609 | } |
| 610 | |
| 611 | if (list_empty(&q->stream)) { |
| 612 | if (noblock) { |
| 613 | retval = -EAGAIN; |
| 614 | dprintk(2, "next_buffer: no buffers to dequeue\n"); |
| 615 | goto done; |
| 616 | } else { |
| 617 | dprintk(2, "next_buffer: waiting on buffer\n"); |
| 618 | |
| 619 | /* Drop lock to avoid deadlock with qbuf */ |
| 620 | mutex_unlock(&q->vb_lock); |
| 621 | |
| 622 | /* Checking list_empty and streaming is safe without |
| 623 | * locks because we goto checks to validate while |
| 624 | * holding locks before proceeding */ |
| 625 | retval = wait_event_interruptible(q->wait, |
| 626 | !list_empty(&q->stream) || !q->streaming); |
| 627 | mutex_lock(&q->vb_lock); |
| 628 | |
| 629 | if (retval) |
| 630 | goto done; |
| 631 | |
| 632 | goto checks; |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | retval = 0; |
| 637 | |
| 638 | done: |
| 639 | return retval; |
| 640 | } |
| 641 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 642 | /* Locking: Caller holds q->vb_lock */ |
| 643 | static int stream_next_buffer(struct videobuf_queue *q, |
| 644 | struct videobuf_buffer **vb, int nonblocking) |
| 645 | { |
| 646 | int retval; |
| 647 | struct videobuf_buffer *buf = NULL; |
| 648 | |
| 649 | retval = stream_next_buffer_check_queue(q, nonblocking); |
| 650 | if (retval) |
| 651 | goto done; |
| 652 | |
| 653 | buf = list_entry(q->stream.next, struct videobuf_buffer, stream); |
| 654 | retval = videobuf_waiton(buf, nonblocking, 1); |
| 655 | if (retval < 0) |
| 656 | goto done; |
| 657 | |
| 658 | *vb = buf; |
| 659 | done: |
| 660 | return retval; |
| 661 | } |
| 662 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 663 | int videobuf_dqbuf(struct videobuf_queue *q, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 664 | struct v4l2_buffer *b, int nonblocking) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 665 | { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 666 | struct videobuf_buffer *buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 667 | int retval; |
| 668 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 669 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 670 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 671 | mutex_lock(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 672 | |
| 673 | retval = stream_next_buffer(q, &buf, nonblocking); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 674 | if (retval < 0) { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 675 | dprintk(1, "dqbuf: next_buffer error: %i\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 676 | goto done; |
| 677 | } |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 678 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 679 | switch (buf->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 680 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 681 | dprintk(1, "dqbuf: state is error\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 682 | retval = -EIO; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 683 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 684 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 685 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 686 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 687 | dprintk(1, "dqbuf: state is done\n"); |
| 688 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 689 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 690 | break; |
| 691 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 692 | dprintk(1, "dqbuf: state invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 693 | retval = -EINVAL; |
| 694 | goto done; |
| 695 | } |
| 696 | list_del(&buf->stream); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 697 | memset(b, 0, sizeof(*b)); |
| 698 | videobuf_status(q, b, buf, q->type); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 699 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 700 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 701 | return retval; |
| 702 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 703 | EXPORT_SYMBOL_GPL(videobuf_dqbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 704 | |
| 705 | int videobuf_streamon(struct videobuf_queue *q) |
| 706 | { |
| 707 | struct videobuf_buffer *buf; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 708 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 709 | int retval; |
| 710 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 711 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 712 | retval = -EBUSY; |
| 713 | if (q->reading) |
| 714 | goto done; |
| 715 | retval = 0; |
| 716 | if (q->streaming) |
| 717 | goto done; |
| 718 | q->streaming = 1; |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 719 | spin_lock_irqsave(q->irqlock, flags); |
Trent Piepho | a991f44 | 2007-10-10 05:37:43 -0300 | [diff] [blame] | 720 | list_for_each_entry(buf, &q->stream, stream) |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 721 | if (buf->state == VIDEOBUF_PREPARED) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 722 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 723 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 724 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 725 | wake_up_interruptible_sync(&q->wait); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 726 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 727 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 728 | return retval; |
| 729 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 730 | EXPORT_SYMBOL_GPL(videobuf_streamon); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 731 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 732 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 733 | static int __videobuf_streamoff(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 734 | { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 735 | if (!q->streaming) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 736 | return -EINVAL; |
| 737 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 738 | videobuf_queue_cancel(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 739 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 740 | return 0; |
| 741 | } |
| 742 | |
| 743 | int videobuf_streamoff(struct videobuf_queue *q) |
| 744 | { |
| 745 | int retval; |
| 746 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 747 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 748 | retval = __videobuf_streamoff(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 749 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 750 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 751 | return retval; |
| 752 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 753 | EXPORT_SYMBOL_GPL(videobuf_streamoff); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 754 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 755 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 756 | static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, |
| 757 | char __user *data, |
| 758 | size_t count, loff_t *ppos) |
| 759 | { |
| 760 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 761 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 762 | int retval; |
| 763 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 764 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 765 | |
| 766 | /* setup stuff */ |
| 767 | q->read_buf = videobuf_alloc(q); |
| 768 | if (NULL == q->read_buf) |
| 769 | return -ENOMEM; |
| 770 | |
| 771 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 772 | q->read_buf->baddr = (unsigned long)data; |
| 773 | q->read_buf->bsize = count; |
| 774 | |
| 775 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 776 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 777 | if (0 != retval) |
| 778 | goto done; |
| 779 | |
| 780 | /* start capture & wait */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 781 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 782 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 783 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 784 | retval = videobuf_waiton(q->read_buf, 0, 0); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 785 | if (0 == retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 786 | CALL(q, sync, q, q->read_buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 787 | if (VIDEOBUF_ERROR == q->read_buf->state) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 788 | retval = -EIO; |
| 789 | else |
| 790 | retval = q->read_buf->size; |
| 791 | } |
| 792 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 793 | done: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 794 | /* cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 795 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 796 | kfree(q->read_buf); |
| 797 | q->read_buf = NULL; |
| 798 | return retval; |
| 799 | } |
| 800 | |
| 801 | ssize_t videobuf_read_one(struct videobuf_queue *q, |
| 802 | char __user *data, size_t count, loff_t *ppos, |
| 803 | int nonblocking) |
| 804 | { |
| 805 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 806 | unsigned long flags = 0; |
Guennadi Liakhovetski | 7daa4a8 | 2008-04-22 14:46:03 -0300 | [diff] [blame] | 807 | unsigned size = 0, nbufs = 1; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 808 | int retval; |
| 809 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 810 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 811 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 812 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 813 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 814 | q->ops->buf_setup(q, &nbufs, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 815 | |
| 816 | if (NULL == q->read_buf && |
| 817 | count >= size && |
| 818 | !nonblocking) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 819 | retval = videobuf_read_zerocopy(q, data, count, ppos); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 820 | if (retval >= 0 || retval == -EIO) |
| 821 | /* ok, all done */ |
| 822 | goto done; |
| 823 | /* fallback to kernel bounce buffer on failures */ |
| 824 | } |
| 825 | |
| 826 | if (NULL == q->read_buf) { |
| 827 | /* need to capture a new frame */ |
| 828 | retval = -ENOMEM; |
| 829 | q->read_buf = videobuf_alloc(q); |
| 830 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 831 | dprintk(1, "video alloc=0x%p\n", q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 832 | if (NULL == q->read_buf) |
| 833 | goto done; |
| 834 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 835 | q->read_buf->bsize = count; /* preferred size */ |
| 836 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 837 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 838 | |
| 839 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 840 | kfree(q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 841 | q->read_buf = NULL; |
| 842 | goto done; |
| 843 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 844 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 845 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 846 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 847 | spin_unlock_irqrestore(q->irqlock, flags); |
| 848 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 849 | q->read_off = 0; |
| 850 | } |
| 851 | |
| 852 | /* wait until capture is done */ |
| 853 | retval = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 854 | if (0 != retval) |
| 855 | goto done; |
| 856 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 857 | CALL(q, sync, q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 858 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 859 | if (VIDEOBUF_ERROR == q->read_buf->state) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 860 | /* catch I/O errors */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 861 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 862 | kfree(q->read_buf); |
| 863 | q->read_buf = NULL; |
| 864 | retval = -EIO; |
| 865 | goto done; |
| 866 | } |
| 867 | |
| 868 | /* Copy to userspace */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 869 | retval = CALL(q, video_copy_to_user, q, data, count, nonblocking); |
| 870 | if (retval < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 871 | goto done; |
| 872 | |
| 873 | q->read_off += retval; |
| 874 | if (q->read_off == q->read_buf->size) { |
| 875 | /* all data copied, cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 876 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 877 | kfree(q->read_buf); |
| 878 | q->read_buf = NULL; |
| 879 | } |
| 880 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 881 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 882 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 883 | return retval; |
| 884 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 885 | EXPORT_SYMBOL_GPL(videobuf_read_one); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 886 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 887 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 225ba90 | 2007-12-12 21:46:26 -0300 | [diff] [blame] | 888 | static int __videobuf_read_start(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 889 | { |
| 890 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 891 | unsigned long flags = 0; |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 892 | unsigned int count = 0, size = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 893 | int err, i; |
| 894 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 895 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 896 | if (count < 2) |
| 897 | count = 2; |
| 898 | if (count > VIDEO_MAX_FRAME) |
| 899 | count = VIDEO_MAX_FRAME; |
| 900 | size = PAGE_ALIGN(size); |
| 901 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 902 | err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 903 | if (err < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 904 | return err; |
| 905 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 906 | count = err; |
| 907 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 908 | for (i = 0; i < count; i++) { |
| 909 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 910 | err = q->ops->buf_prepare(q, q->bufs[i], field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 911 | if (err) |
| 912 | return err; |
| 913 | list_add_tail(&q->bufs[i]->stream, &q->stream); |
| 914 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 915 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 916 | for (i = 0; i < count; i++) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 917 | q->ops->buf_queue(q, q->bufs[i]); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 918 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 919 | q->reading = 1; |
| 920 | return 0; |
| 921 | } |
| 922 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 923 | static void __videobuf_read_stop(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 924 | { |
| 925 | int i; |
| 926 | |
| 927 | videobuf_queue_cancel(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 928 | __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 929 | INIT_LIST_HEAD(&q->stream); |
| 930 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 931 | if (NULL == q->bufs[i]) |
| 932 | continue; |
| 933 | kfree(q->bufs[i]); |
| 934 | q->bufs[i] = NULL; |
| 935 | } |
| 936 | q->read_buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 937 | } |
| 938 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 939 | int videobuf_read_start(struct videobuf_queue *q) |
| 940 | { |
| 941 | int rc; |
| 942 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 943 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 944 | rc = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 945 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 946 | |
| 947 | return rc; |
| 948 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 949 | EXPORT_SYMBOL_GPL(videobuf_read_start); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 950 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 951 | void videobuf_read_stop(struct videobuf_queue *q) |
| 952 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 953 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 954 | __videobuf_read_stop(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 955 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 956 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 957 | EXPORT_SYMBOL_GPL(videobuf_read_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 958 | |
| 959 | void videobuf_stop(struct videobuf_queue *q) |
| 960 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 961 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 962 | |
| 963 | if (q->streaming) |
| 964 | __videobuf_streamoff(q); |
| 965 | |
| 966 | if (q->reading) |
| 967 | __videobuf_read_stop(q); |
| 968 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 969 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 970 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 971 | EXPORT_SYMBOL_GPL(videobuf_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 972 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 973 | ssize_t videobuf_read_stream(struct videobuf_queue *q, |
| 974 | char __user *data, size_t count, loff_t *ppos, |
| 975 | int vbihack, int nonblocking) |
| 976 | { |
| 977 | int rc, retval; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 978 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 979 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 980 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 981 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 982 | dprintk(2, "%s\n", __func__); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 983 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 984 | retval = -EBUSY; |
| 985 | if (q->streaming) |
| 986 | goto done; |
| 987 | if (!q->reading) { |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 988 | retval = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 989 | if (retval < 0) |
| 990 | goto done; |
| 991 | } |
| 992 | |
| 993 | retval = 0; |
| 994 | while (count > 0) { |
| 995 | /* get / wait for data */ |
| 996 | if (NULL == q->read_buf) { |
| 997 | q->read_buf = list_entry(q->stream.next, |
| 998 | struct videobuf_buffer, |
| 999 | stream); |
| 1000 | list_del(&q->read_buf->stream); |
| 1001 | q->read_off = 0; |
| 1002 | } |
| 1003 | rc = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 1004 | if (rc < 0) { |
| 1005 | if (0 == retval) |
| 1006 | retval = rc; |
| 1007 | break; |
| 1008 | } |
| 1009 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1010 | if (q->read_buf->state == VIDEOBUF_DONE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1011 | rc = CALL(q, copy_stream, q, data + retval, count, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1012 | retval, vbihack, nonblocking); |
| 1013 | if (rc < 0) { |
| 1014 | retval = rc; |
| 1015 | break; |
| 1016 | } |
| 1017 | retval += rc; |
| 1018 | count -= rc; |
| 1019 | q->read_off += rc; |
| 1020 | } else { |
| 1021 | /* some error */ |
| 1022 | q->read_off = q->read_buf->size; |
| 1023 | if (0 == retval) |
| 1024 | retval = -EIO; |
| 1025 | } |
| 1026 | |
| 1027 | /* requeue buffer when done with copying */ |
| 1028 | if (q->read_off == q->read_buf->size) { |
| 1029 | list_add_tail(&q->read_buf->stream, |
| 1030 | &q->stream); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1031 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1032 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1033 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1034 | q->read_buf = NULL; |
| 1035 | } |
| 1036 | if (retval < 0) |
| 1037 | break; |
| 1038 | } |
| 1039 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1040 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1041 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1042 | return retval; |
| 1043 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1044 | EXPORT_SYMBOL_GPL(videobuf_read_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1045 | |
| 1046 | unsigned int videobuf_poll_stream(struct file *file, |
| 1047 | struct videobuf_queue *q, |
| 1048 | poll_table *wait) |
| 1049 | { |
| 1050 | struct videobuf_buffer *buf = NULL; |
| 1051 | unsigned int rc = 0; |
| 1052 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1053 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1054 | if (q->streaming) { |
| 1055 | if (!list_empty(&q->stream)) |
| 1056 | buf = list_entry(q->stream.next, |
| 1057 | struct videobuf_buffer, stream); |
| 1058 | } else { |
| 1059 | if (!q->reading) |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 1060 | __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1061 | if (!q->reading) { |
| 1062 | rc = POLLERR; |
| 1063 | } else if (NULL == q->read_buf) { |
| 1064 | q->read_buf = list_entry(q->stream.next, |
| 1065 | struct videobuf_buffer, |
| 1066 | stream); |
| 1067 | list_del(&q->read_buf->stream); |
| 1068 | q->read_off = 0; |
| 1069 | } |
| 1070 | buf = q->read_buf; |
| 1071 | } |
| 1072 | if (!buf) |
| 1073 | rc = POLLERR; |
| 1074 | |
| 1075 | if (0 == rc) { |
| 1076 | poll_wait(file, &buf->done, wait); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1077 | if (buf->state == VIDEOBUF_DONE || |
| 1078 | buf->state == VIDEOBUF_ERROR) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1079 | rc = POLLIN|POLLRDNORM; |
| 1080 | } |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1081 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1082 | return rc; |
| 1083 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1084 | EXPORT_SYMBOL_GPL(videobuf_poll_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1085 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1086 | 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] | 1087 | { |
| 1088 | int retval; |
| 1089 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1090 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1091 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1092 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1093 | retval = CALL(q, mmap_mapper, q, vma); |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 1094 | q->is_mmapped = 1; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1095 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1096 | |
| 1097 | return retval; |
| 1098 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1099 | EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1100 | |
| 1101 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
| 1102 | int videobuf_cgmbuf(struct videobuf_queue *q, |
| 1103 | struct video_mbuf *mbuf, int count) |
| 1104 | { |
| 1105 | struct v4l2_requestbuffers req; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1106 | int rc, i; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1107 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1108 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1109 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1110 | memset(&req, 0, sizeof(req)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1111 | req.type = q->type; |
| 1112 | req.count = count; |
| 1113 | req.memory = V4L2_MEMORY_MMAP; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1114 | rc = videobuf_reqbufs(q, &req); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1115 | if (rc < 0) |
| 1116 | return rc; |
| 1117 | |
| 1118 | mbuf->frames = req.count; |
| 1119 | mbuf->size = 0; |
| 1120 | for (i = 0; i < mbuf->frames; i++) { |
| 1121 | mbuf->offsets[i] = q->bufs[i]->boff; |
Tuukka Toivonen | 7cbefad | 2009-07-23 10:56:25 -0300 | [diff] [blame] | 1122 | mbuf->size += PAGE_ALIGN(q->bufs[i]->bsize); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1123 | } |
| 1124 | |
| 1125 | return 0; |
| 1126 | } |
Pekka Enberg | a13625c | 2007-10-13 05:54:54 -0300 | [diff] [blame] | 1127 | EXPORT_SYMBOL_GPL(videobuf_cgmbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1128 | #endif |
| 1129 | |