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 | |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame^] | 55 | struct videobuf_buffer *videobuf_alloc_vb(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 | |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame^] | 61 | if (!q->int_ops || !q->int_ops->alloc_vb) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 62 | printk(KERN_ERR "No specific ops defined!\n"); |
| 63 | BUG(); |
| 64 | } |
| 65 | |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame^] | 66 | vb = q->int_ops->alloc_vb(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 | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame^] | 74 | EXPORT_SYMBOL_GPL(videobuf_alloc_vb); |
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 | |
Hans Verkuil | f4fce60 | 2010-03-28 08:33:23 -0300 | [diff] [blame] | 108 | void *videobuf_queue_to_vaddr(struct videobuf_queue *q, |
| 109 | struct videobuf_buffer *buf) |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 110 | { |
Hans Verkuil | 037c75e | 2010-03-28 08:18:37 -0300 | [diff] [blame] | 111 | if (q->int_ops->vaddr) |
| 112 | return q->int_ops->vaddr(buf); |
Hans Verkuil | f4fce60 | 2010-03-28 08:33:23 -0300 | [diff] [blame] | 113 | return NULL; |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 114 | } |
Hans Verkuil | f4fce60 | 2010-03-28 08:33:23 -0300 | [diff] [blame] | 115 | EXPORT_SYMBOL_GPL(videobuf_queue_to_vaddr); |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 116 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 117 | /* --------------------------------------------------------------------- */ |
| 118 | |
| 119 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 120 | void videobuf_queue_core_init(struct videobuf_queue *q, |
Jonathan Corbet | 38a54f3 | 2009-11-17 19:43:41 -0300 | [diff] [blame] | 121 | const struct videobuf_queue_ops *ops, |
Guennadi Liakhovetski | e9bcf66 | 2008-04-22 14:46:02 -0300 | [diff] [blame] | 122 | struct device *dev, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 123 | spinlock_t *irqlock, |
| 124 | enum v4l2_buf_type type, |
| 125 | enum v4l2_field field, |
| 126 | unsigned int msize, |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 127 | void *priv, |
| 128 | struct videobuf_qtype_ops *int_ops) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 129 | { |
Figo.zhang | 96ceea2 | 2009-06-02 23:01:04 -0300 | [diff] [blame] | 130 | BUG_ON(!q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 131 | memset(q, 0, sizeof(*q)); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 132 | q->irqlock = irqlock; |
| 133 | q->dev = dev; |
| 134 | q->type = type; |
| 135 | q->field = field; |
| 136 | q->msize = msize; |
| 137 | q->ops = ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 138 | q->priv_data = priv; |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 139 | q->int_ops = int_ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 140 | |
| 141 | /* All buffer operations are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 142 | BUG_ON(!q->ops->buf_setup); |
| 143 | BUG_ON(!q->ops->buf_prepare); |
| 144 | BUG_ON(!q->ops->buf_queue); |
| 145 | BUG_ON(!q->ops->buf_release); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 146 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 147 | /* Lock is mandatory for queue_cancel to work */ |
| 148 | BUG_ON(!irqlock); |
| 149 | |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 150 | /* Having implementations for abstract methods are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 151 | BUG_ON(!q->int_ops); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 152 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 153 | mutex_init(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 154 | init_waitqueue_head(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 155 | INIT_LIST_HEAD(&q->stream); |
| 156 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 157 | EXPORT_SYMBOL_GPL(videobuf_queue_core_init); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 158 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 159 | /* Locking: Only usage in bttv unsafe find way to remove */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 160 | int videobuf_queue_is_busy(struct videobuf_queue *q) |
| 161 | { |
| 162 | int i; |
| 163 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 164 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 165 | |
| 166 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 167 | dprintk(1, "busy: streaming active\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 168 | return 1; |
| 169 | } |
| 170 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 171 | dprintk(1, "busy: pending read #1\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 172 | return 1; |
| 173 | } |
| 174 | if (q->read_buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 175 | dprintk(1, "busy: pending read #2\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 176 | return 1; |
| 177 | } |
| 178 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 179 | if (NULL == q->bufs[i]) |
| 180 | continue; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 181 | if (q->bufs[i]->map) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 182 | dprintk(1, "busy: buffer #%d mapped\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 183 | return 1; |
| 184 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 185 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 186 | dprintk(1, "busy: buffer #%d queued\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 187 | return 1; |
| 188 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 189 | if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 190 | dprintk(1, "busy: buffer #%d avtive\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 191 | return 1; |
| 192 | } |
| 193 | } |
| 194 | return 0; |
| 195 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 196 | EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 197 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 198 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 199 | void videobuf_queue_cancel(struct videobuf_queue *q) |
| 200 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 201 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 202 | int i; |
| 203 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 204 | q->streaming = 0; |
| 205 | q->reading = 0; |
| 206 | wake_up_interruptible_sync(&q->wait); |
| 207 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 208 | /* remove queued buffers from list */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 209 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 210 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 211 | if (NULL == q->bufs[i]) |
| 212 | continue; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 213 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 214 | list_del(&q->bufs[i]->queue); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 215 | q->bufs[i]->state = VIDEOBUF_ERROR; |
Brandon Philips | b608f43 | 2008-04-02 18:10:57 -0300 | [diff] [blame] | 216 | wake_up_all(&q->bufs[i]->done); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 217 | } |
| 218 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 219 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 220 | |
| 221 | /* free all buffers + clear queue */ |
| 222 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 223 | if (NULL == q->bufs[i]) |
| 224 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 225 | q->ops->buf_release(q, q->bufs[i]); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 226 | } |
| 227 | INIT_LIST_HEAD(&q->stream); |
| 228 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 229 | EXPORT_SYMBOL_GPL(videobuf_queue_cancel); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 230 | |
| 231 | /* --------------------------------------------------------------------- */ |
| 232 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 233 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 234 | enum v4l2_field videobuf_next_field(struct videobuf_queue *q) |
| 235 | { |
| 236 | enum v4l2_field field = q->field; |
| 237 | |
| 238 | BUG_ON(V4L2_FIELD_ANY == field); |
| 239 | |
| 240 | if (V4L2_FIELD_ALTERNATE == field) { |
| 241 | if (V4L2_FIELD_TOP == q->last) { |
| 242 | field = V4L2_FIELD_BOTTOM; |
| 243 | q->last = V4L2_FIELD_BOTTOM; |
| 244 | } else { |
| 245 | field = V4L2_FIELD_TOP; |
| 246 | q->last = V4L2_FIELD_TOP; |
| 247 | } |
| 248 | } |
| 249 | return field; |
| 250 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 251 | EXPORT_SYMBOL_GPL(videobuf_next_field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 252 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 253 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 254 | static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, |
| 255 | struct videobuf_buffer *vb, enum v4l2_buf_type type) |
| 256 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 257 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 258 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 259 | |
| 260 | b->index = vb->i; |
| 261 | b->type = type; |
| 262 | |
| 263 | b->memory = vb->memory; |
| 264 | switch (b->memory) { |
| 265 | case V4L2_MEMORY_MMAP: |
| 266 | b->m.offset = vb->boff; |
| 267 | b->length = vb->bsize; |
| 268 | break; |
| 269 | case V4L2_MEMORY_USERPTR: |
| 270 | b->m.userptr = vb->baddr; |
| 271 | b->length = vb->bsize; |
| 272 | break; |
| 273 | case V4L2_MEMORY_OVERLAY: |
| 274 | b->m.offset = vb->boff; |
| 275 | break; |
| 276 | } |
| 277 | |
| 278 | b->flags = 0; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 279 | if (vb->map) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 280 | b->flags |= V4L2_BUF_FLAG_MAPPED; |
| 281 | |
| 282 | switch (vb->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 283 | case VIDEOBUF_PREPARED: |
| 284 | case VIDEOBUF_QUEUED: |
| 285 | case VIDEOBUF_ACTIVE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 286 | b->flags |= V4L2_BUF_FLAG_QUEUED; |
| 287 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 288 | case VIDEOBUF_ERROR: |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 289 | b->flags |= V4L2_BUF_FLAG_ERROR; |
| 290 | /* fall through */ |
| 291 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 292 | b->flags |= V4L2_BUF_FLAG_DONE; |
| 293 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 294 | case VIDEOBUF_NEEDS_INIT: |
| 295 | case VIDEOBUF_IDLE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 296 | /* nothing */ |
| 297 | break; |
| 298 | } |
| 299 | |
| 300 | if (vb->input != UNSET) { |
| 301 | b->flags |= V4L2_BUF_FLAG_INPUT; |
| 302 | b->input = vb->input; |
| 303 | } |
| 304 | |
| 305 | b->field = vb->field; |
| 306 | b->timestamp = vb->ts; |
| 307 | b->bytesused = vb->size; |
| 308 | b->sequence = vb->field_count >> 1; |
| 309 | } |
| 310 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 311 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 312 | static int __videobuf_mmap_free(struct videobuf_queue *q) |
| 313 | { |
| 314 | int i; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 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 | |
Hans Verkuil | 53aaf07 | 2010-03-28 07:54:29 -0300 | [diff] [blame] | 321 | for (i = 0; i < VIDEO_MAX_FRAME; i++) |
| 322 | if (q->bufs[i] && q->bufs[i]->map) |
| 323 | return -EBUSY; |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 324 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 325 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 326 | if (NULL == q->bufs[i]) |
| 327 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 328 | q->ops->buf_release(q, q->bufs[i]); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 329 | kfree(q->bufs[i]); |
| 330 | q->bufs[i] = NULL; |
| 331 | } |
| 332 | |
Hans Verkuil | 53aaf07 | 2010-03-28 07:54:29 -0300 | [diff] [blame] | 333 | return 0; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | int videobuf_mmap_free(struct videobuf_queue *q) |
| 337 | { |
| 338 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 339 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 340 | ret = __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 341 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 342 | return ret; |
| 343 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 344 | EXPORT_SYMBOL_GPL(videobuf_mmap_free); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 345 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 346 | /* Locking: Caller holds q->vb_lock */ |
Arjan van de Ven | 81b2dbc | 2008-05-20 09:53:52 -0700 | [diff] [blame] | 347 | int __videobuf_mmap_setup(struct videobuf_queue *q, |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 348 | unsigned int bcount, unsigned int bsize, |
| 349 | enum v4l2_memory memory) |
| 350 | { |
| 351 | unsigned int i; |
| 352 | int err; |
| 353 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 354 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 355 | |
| 356 | err = __videobuf_mmap_free(q); |
| 357 | if (0 != err) |
| 358 | return err; |
| 359 | |
| 360 | /* Allocate and initialize buffers */ |
| 361 | for (i = 0; i < bcount; i++) { |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame^] | 362 | q->bufs[i] = videobuf_alloc_vb(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 363 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 364 | if (NULL == q->bufs[i]) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 365 | break; |
| 366 | |
| 367 | q->bufs[i]->i = i; |
| 368 | q->bufs[i]->input = UNSET; |
| 369 | q->bufs[i]->memory = memory; |
| 370 | q->bufs[i]->bsize = bsize; |
| 371 | switch (memory) { |
| 372 | case V4L2_MEMORY_MMAP: |
Tuukka Toivonen | 7cbefad | 2009-07-23 10:56:25 -0300 | [diff] [blame] | 373 | q->bufs[i]->boff = PAGE_ALIGN(bsize) * i; |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 374 | break; |
| 375 | case V4L2_MEMORY_USERPTR: |
| 376 | case V4L2_MEMORY_OVERLAY: |
| 377 | /* nothing */ |
| 378 | break; |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | if (!i) |
| 383 | return -ENOMEM; |
| 384 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 385 | dprintk(1, "mmap setup: %d buffers, %d bytes each\n", i, bsize); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 386 | |
| 387 | return i; |
| 388 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 389 | EXPORT_SYMBOL_GPL(__videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 390 | |
| 391 | int videobuf_mmap_setup(struct videobuf_queue *q, |
| 392 | unsigned int bcount, unsigned int bsize, |
| 393 | enum v4l2_memory memory) |
| 394 | { |
| 395 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 396 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 397 | ret = __videobuf_mmap_setup(q, bcount, bsize, memory); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 398 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 399 | return ret; |
| 400 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 401 | EXPORT_SYMBOL_GPL(videobuf_mmap_setup); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 402 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 403 | int videobuf_reqbufs(struct videobuf_queue *q, |
| 404 | struct v4l2_requestbuffers *req) |
| 405 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 406 | unsigned int size, count; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 407 | int retval; |
| 408 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 409 | if (req->count < 1) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 410 | dprintk(1, "reqbufs: count invalid (%d)\n", req->count); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 411 | return -EINVAL; |
| 412 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 413 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 414 | if (req->memory != V4L2_MEMORY_MMAP && |
| 415 | req->memory != V4L2_MEMORY_USERPTR && |
| 416 | req->memory != V4L2_MEMORY_OVERLAY) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 417 | dprintk(1, "reqbufs: memory type invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 418 | return -EINVAL; |
| 419 | } |
| 420 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 421 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 422 | if (req->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 423 | dprintk(1, "reqbufs: queue type invalid\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 424 | retval = -EINVAL; |
| 425 | goto done; |
| 426 | } |
| 427 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 428 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 429 | dprintk(1, "reqbufs: streaming already exists\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 430 | retval = -EBUSY; |
| 431 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 432 | } |
| 433 | if (!list_empty(&q->stream)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 434 | dprintk(1, "reqbufs: stream running\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 435 | retval = -EBUSY; |
| 436 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 437 | } |
| 438 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 439 | count = req->count; |
| 440 | if (count > VIDEO_MAX_FRAME) |
| 441 | count = VIDEO_MAX_FRAME; |
| 442 | size = 0; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 443 | q->ops->buf_setup(q, &count, &size); |
Márton Németh | 296372e | 2009-11-22 18:03:05 -0300 | [diff] [blame] | 444 | dprintk(1, "reqbufs: bufs=%d, size=0x%x [%u pages total]\n", |
| 445 | count, size, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 446 | (unsigned int)((count * PAGE_ALIGN(size)) >> PAGE_SHIFT)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 447 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 448 | retval = __videobuf_mmap_setup(q, count, size, req->memory); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 449 | if (retval < 0) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 450 | dprintk(1, "reqbufs: mmap setup returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 451 | goto done; |
| 452 | } |
| 453 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 454 | req->count = retval; |
Németh Márton | 925d74a | 2009-04-29 15:57:24 -0300 | [diff] [blame] | 455 | retval = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 456 | |
| 457 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 458 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 459 | return retval; |
| 460 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 461 | EXPORT_SYMBOL_GPL(videobuf_reqbufs); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 462 | |
| 463 | int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
| 464 | { |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 465 | int ret = -EINVAL; |
| 466 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 467 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 468 | if (unlikely(b->type != q->type)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 469 | dprintk(1, "querybuf: Wrong type.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 470 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 471 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 472 | if (unlikely(b->index >= VIDEO_MAX_FRAME)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 473 | dprintk(1, "querybuf: index out of range.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 474 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 475 | } |
| 476 | if (unlikely(NULL == q->bufs[b->index])) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 477 | dprintk(1, "querybuf: buffer is null.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 478 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 479 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 480 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 481 | videobuf_status(q, b, q->bufs[b->index], q->type); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 482 | |
| 483 | ret = 0; |
| 484 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 485 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 486 | return ret; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 487 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 488 | EXPORT_SYMBOL_GPL(videobuf_querybuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 489 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 490 | int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 491 | { |
| 492 | struct videobuf_buffer *buf; |
| 493 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 494 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 495 | int retval; |
| 496 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 497 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 498 | |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 499 | if (b->memory == V4L2_MEMORY_MMAP) |
| 500 | down_read(¤t->mm->mmap_sem); |
| 501 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 502 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 503 | retval = -EBUSY; |
| 504 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 505 | dprintk(1, "qbuf: Reading running...\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 506 | goto done; |
| 507 | } |
| 508 | retval = -EINVAL; |
| 509 | if (b->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 510 | dprintk(1, "qbuf: Wrong type.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 511 | goto done; |
| 512 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame] | 513 | if (b->index >= VIDEO_MAX_FRAME) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 514 | dprintk(1, "qbuf: index out of range.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 515 | goto done; |
| 516 | } |
| 517 | buf = q->bufs[b->index]; |
| 518 | if (NULL == buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 519 | dprintk(1, "qbuf: buffer is null.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 520 | goto done; |
| 521 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 522 | MAGIC_CHECK(buf->magic, MAGIC_BUFFER); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 523 | if (buf->memory != b->memory) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 524 | dprintk(1, "qbuf: memory type is wrong.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 525 | goto done; |
| 526 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 527 | if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 528 | dprintk(1, "qbuf: buffer is already queued or active.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 529 | goto done; |
| 530 | } |
| 531 | |
| 532 | if (b->flags & V4L2_BUF_FLAG_INPUT) { |
| 533 | if (b->input >= q->inputs) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 534 | dprintk(1, "qbuf: wrong input.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 535 | goto done; |
| 536 | } |
| 537 | buf->input = b->input; |
| 538 | } else { |
| 539 | buf->input = UNSET; |
| 540 | } |
| 541 | |
| 542 | switch (b->memory) { |
| 543 | case V4L2_MEMORY_MMAP: |
| 544 | if (0 == buf->baddr) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 545 | dprintk(1, "qbuf: mmap requested " |
| 546 | "but buffer addr is zero!\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 547 | goto done; |
| 548 | } |
Pawel Osciak | 96f2ec6 | 2010-04-21 06:44:27 -0300 | [diff] [blame] | 549 | if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT |
| 550 | || q->type == V4L2_BUF_TYPE_VBI_OUTPUT |
| 551 | || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) { |
| 552 | buf->size = b->bytesused; |
| 553 | buf->field = b->field; |
| 554 | buf->ts = b->timestamp; |
| 555 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 556 | break; |
| 557 | case V4L2_MEMORY_USERPTR: |
| 558 | if (b->length < buf->bsize) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 559 | dprintk(1, "qbuf: buffer length is not enough\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 560 | goto done; |
| 561 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 562 | if (VIDEOBUF_NEEDS_INIT != buf->state && |
| 563 | buf->baddr != b->m.userptr) |
| 564 | q->ops->buf_release(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 565 | buf->baddr = b->m.userptr; |
| 566 | break; |
| 567 | case V4L2_MEMORY_OVERLAY: |
| 568 | buf->boff = b->m.offset; |
| 569 | break; |
| 570 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 571 | dprintk(1, "qbuf: wrong memory type\n"); |
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 | dprintk(1, "qbuf: requesting next field\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 576 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 577 | retval = q->ops->buf_prepare(q, buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 578 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 579 | dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 580 | goto done; |
| 581 | } |
| 582 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 583 | list_add_tail(&buf->stream, &q->stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 584 | if (q->streaming) { |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 585 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 586 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 587 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 588 | } |
Hans Verkuil | 771075b | 2010-03-13 11:47:06 -0300 | [diff] [blame] | 589 | dprintk(1, "qbuf: succeeded\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 590 | retval = 0; |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 591 | wake_up_interruptible_sync(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 592 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 593 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 594 | mutex_unlock(&q->vb_lock); |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 595 | |
| 596 | if (b->memory == V4L2_MEMORY_MMAP) |
| 597 | up_read(¤t->mm->mmap_sem); |
| 598 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 599 | return retval; |
| 600 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 601 | EXPORT_SYMBOL_GPL(videobuf_qbuf); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 602 | |
| 603 | /* Locking: Caller holds q->vb_lock */ |
| 604 | static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock) |
| 605 | { |
| 606 | int retval; |
| 607 | |
| 608 | checks: |
| 609 | if (!q->streaming) { |
| 610 | dprintk(1, "next_buffer: Not streaming\n"); |
| 611 | retval = -EINVAL; |
| 612 | goto done; |
| 613 | } |
| 614 | |
| 615 | if (list_empty(&q->stream)) { |
| 616 | if (noblock) { |
| 617 | retval = -EAGAIN; |
| 618 | dprintk(2, "next_buffer: no buffers to dequeue\n"); |
| 619 | goto done; |
| 620 | } else { |
| 621 | dprintk(2, "next_buffer: waiting on buffer\n"); |
| 622 | |
| 623 | /* Drop lock to avoid deadlock with qbuf */ |
| 624 | mutex_unlock(&q->vb_lock); |
| 625 | |
| 626 | /* Checking list_empty and streaming is safe without |
| 627 | * locks because we goto checks to validate while |
| 628 | * holding locks before proceeding */ |
| 629 | retval = wait_event_interruptible(q->wait, |
| 630 | !list_empty(&q->stream) || !q->streaming); |
| 631 | mutex_lock(&q->vb_lock); |
| 632 | |
| 633 | if (retval) |
| 634 | goto done; |
| 635 | |
| 636 | goto checks; |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | retval = 0; |
| 641 | |
| 642 | done: |
| 643 | return retval; |
| 644 | } |
| 645 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 646 | /* Locking: Caller holds q->vb_lock */ |
| 647 | static int stream_next_buffer(struct videobuf_queue *q, |
| 648 | struct videobuf_buffer **vb, int nonblocking) |
| 649 | { |
| 650 | int retval; |
| 651 | struct videobuf_buffer *buf = NULL; |
| 652 | |
| 653 | retval = stream_next_buffer_check_queue(q, nonblocking); |
| 654 | if (retval) |
| 655 | goto done; |
| 656 | |
| 657 | buf = list_entry(q->stream.next, struct videobuf_buffer, stream); |
| 658 | retval = videobuf_waiton(buf, nonblocking, 1); |
| 659 | if (retval < 0) |
| 660 | goto done; |
| 661 | |
| 662 | *vb = buf; |
| 663 | done: |
| 664 | return retval; |
| 665 | } |
| 666 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 667 | int videobuf_dqbuf(struct videobuf_queue *q, |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 668 | struct v4l2_buffer *b, int nonblocking) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 669 | { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 670 | struct videobuf_buffer *buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 671 | int retval; |
| 672 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 673 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 674 | |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 675 | memset(b, 0, sizeof(*b)); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 676 | mutex_lock(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 677 | |
| 678 | retval = stream_next_buffer(q, &buf, nonblocking); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 679 | if (retval < 0) { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 680 | dprintk(1, "dqbuf: next_buffer error: %i\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 681 | goto done; |
| 682 | } |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 683 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 684 | switch (buf->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 685 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 686 | dprintk(1, "dqbuf: state is error\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 687 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 688 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 689 | dprintk(1, "dqbuf: state is done\n"); |
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 | } |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 696 | CALL(q, sync, q, buf); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 697 | videobuf_status(q, b, buf, q->type); |
Hans Verkuil | b2dfd1a | 2010-04-28 04:05:22 -0300 | [diff] [blame] | 698 | list_del(&buf->stream); |
| 699 | buf->state = VIDEOBUF_IDLE; |
| 700 | b->flags &= ~V4L2_BUF_FLAG_DONE; |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 701 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 702 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 703 | return retval; |
| 704 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 705 | EXPORT_SYMBOL_GPL(videobuf_dqbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 706 | |
| 707 | int videobuf_streamon(struct videobuf_queue *q) |
| 708 | { |
| 709 | struct videobuf_buffer *buf; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 710 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 711 | int retval; |
| 712 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 713 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 714 | retval = -EBUSY; |
| 715 | if (q->reading) |
| 716 | goto done; |
| 717 | retval = 0; |
| 718 | if (q->streaming) |
| 719 | goto done; |
| 720 | q->streaming = 1; |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 721 | spin_lock_irqsave(q->irqlock, flags); |
Trent Piepho | a991f44 | 2007-10-10 05:37:43 -0300 | [diff] [blame] | 722 | list_for_each_entry(buf, &q->stream, stream) |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 723 | if (buf->state == VIDEOBUF_PREPARED) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 724 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 725 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 726 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 727 | wake_up_interruptible_sync(&q->wait); |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 728 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 729 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 730 | return retval; |
| 731 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 732 | EXPORT_SYMBOL_GPL(videobuf_streamon); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 733 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 734 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 735 | static int __videobuf_streamoff(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 736 | { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 737 | if (!q->streaming) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 738 | return -EINVAL; |
| 739 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 740 | videobuf_queue_cancel(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 741 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 742 | return 0; |
| 743 | } |
| 744 | |
| 745 | int videobuf_streamoff(struct videobuf_queue *q) |
| 746 | { |
| 747 | int retval; |
| 748 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 749 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 750 | retval = __videobuf_streamoff(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 751 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 752 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 753 | return retval; |
| 754 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 755 | EXPORT_SYMBOL_GPL(videobuf_streamoff); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 756 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 757 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 758 | static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, |
| 759 | char __user *data, |
| 760 | size_t count, loff_t *ppos) |
| 761 | { |
| 762 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 763 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 764 | int retval; |
| 765 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 766 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 767 | |
| 768 | /* setup stuff */ |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame^] | 769 | q->read_buf = videobuf_alloc_vb(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 770 | if (NULL == q->read_buf) |
| 771 | return -ENOMEM; |
| 772 | |
| 773 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 774 | q->read_buf->baddr = (unsigned long)data; |
| 775 | q->read_buf->bsize = count; |
| 776 | |
| 777 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 778 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 779 | if (0 != retval) |
| 780 | goto done; |
| 781 | |
| 782 | /* start capture & wait */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 783 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 784 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 785 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 786 | retval = videobuf_waiton(q->read_buf, 0, 0); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 787 | if (0 == retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 788 | CALL(q, sync, q, q->read_buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 789 | if (VIDEOBUF_ERROR == q->read_buf->state) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 790 | retval = -EIO; |
| 791 | else |
| 792 | retval = q->read_buf->size; |
| 793 | } |
| 794 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 795 | done: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 796 | /* cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 797 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 798 | kfree(q->read_buf); |
| 799 | q->read_buf = NULL; |
| 800 | return retval; |
| 801 | } |
| 802 | |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 803 | static int __videobuf_copy_to_user(struct videobuf_queue *q, |
| 804 | struct videobuf_buffer *buf, |
| 805 | char __user *data, size_t count, |
| 806 | int nonblocking) |
| 807 | { |
| 808 | void *vaddr = CALL(q, vaddr, buf); |
| 809 | |
| 810 | /* copy to userspace */ |
| 811 | if (count > buf->size - q->read_off) |
| 812 | count = buf->size - q->read_off; |
| 813 | |
| 814 | if (copy_to_user(data, vaddr + q->read_off, count)) |
| 815 | return -EFAULT; |
| 816 | |
| 817 | return count; |
| 818 | } |
| 819 | |
| 820 | static int __videobuf_copy_stream(struct videobuf_queue *q, |
| 821 | struct videobuf_buffer *buf, |
| 822 | char __user *data, size_t count, size_t pos, |
| 823 | int vbihack, int nonblocking) |
| 824 | { |
| 825 | unsigned int *fc = CALL(q, vaddr, buf); |
| 826 | |
| 827 | if (vbihack) { |
| 828 | /* dirty, undocumented hack -- pass the frame counter |
| 829 | * within the last four bytes of each vbi data block. |
| 830 | * We need that one to maintain backward compatibility |
| 831 | * to all vbi decoding software out there ... */ |
| 832 | fc += (buf->size >> 2) - 1; |
| 833 | *fc = buf->field_count >> 1; |
| 834 | dprintk(1, "vbihack: %d\n", *fc); |
| 835 | } |
| 836 | |
| 837 | /* copy stuff using the common method */ |
| 838 | count = __videobuf_copy_to_user(q, buf, data, count, nonblocking); |
| 839 | |
| 840 | if ((count == -EFAULT) && (pos == 0)) |
| 841 | return -EFAULT; |
| 842 | |
| 843 | return count; |
| 844 | } |
| 845 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 846 | ssize_t videobuf_read_one(struct videobuf_queue *q, |
| 847 | char __user *data, size_t count, loff_t *ppos, |
| 848 | int nonblocking) |
| 849 | { |
| 850 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 851 | unsigned long flags = 0; |
Guennadi Liakhovetski | 7daa4a8 | 2008-04-22 14:46:03 -0300 | [diff] [blame] | 852 | unsigned size = 0, nbufs = 1; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 853 | int retval; |
| 854 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 855 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 856 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 857 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 858 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 859 | q->ops->buf_setup(q, &nbufs, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 860 | |
| 861 | if (NULL == q->read_buf && |
| 862 | count >= size && |
| 863 | !nonblocking) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 864 | retval = videobuf_read_zerocopy(q, data, count, ppos); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 865 | if (retval >= 0 || retval == -EIO) |
| 866 | /* ok, all done */ |
| 867 | goto done; |
| 868 | /* fallback to kernel bounce buffer on failures */ |
| 869 | } |
| 870 | |
| 871 | if (NULL == q->read_buf) { |
| 872 | /* need to capture a new frame */ |
| 873 | retval = -ENOMEM; |
Pawel Osciak | 33c3828 | 2010-05-11 10:36:28 -0300 | [diff] [blame^] | 874 | q->read_buf = videobuf_alloc_vb(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 875 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 876 | dprintk(1, "video alloc=0x%p\n", q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 877 | if (NULL == q->read_buf) |
| 878 | goto done; |
| 879 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 880 | q->read_buf->bsize = count; /* preferred size */ |
| 881 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 882 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 883 | |
| 884 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 885 | kfree(q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 886 | q->read_buf = NULL; |
| 887 | goto done; |
| 888 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 889 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 890 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 891 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 892 | spin_unlock_irqrestore(q->irqlock, flags); |
| 893 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 894 | q->read_off = 0; |
| 895 | } |
| 896 | |
| 897 | /* wait until capture is done */ |
| 898 | retval = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 899 | if (0 != retval) |
| 900 | goto done; |
| 901 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 902 | CALL(q, sync, q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 903 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 904 | if (VIDEOBUF_ERROR == q->read_buf->state) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 905 | /* catch I/O errors */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 906 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 907 | kfree(q->read_buf); |
| 908 | q->read_buf = NULL; |
| 909 | retval = -EIO; |
| 910 | goto done; |
| 911 | } |
| 912 | |
| 913 | /* Copy to userspace */ |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 914 | retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 915 | if (retval < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 916 | goto done; |
| 917 | |
| 918 | q->read_off += retval; |
| 919 | if (q->read_off == q->read_buf->size) { |
| 920 | /* all data copied, cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 921 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 922 | kfree(q->read_buf); |
| 923 | q->read_buf = NULL; |
| 924 | } |
| 925 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 926 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 927 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 928 | return retval; |
| 929 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 930 | EXPORT_SYMBOL_GPL(videobuf_read_one); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 931 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 932 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 225ba90 | 2007-12-12 21:46:26 -0300 | [diff] [blame] | 933 | static int __videobuf_read_start(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 934 | { |
| 935 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 936 | unsigned long flags = 0; |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 937 | unsigned int count = 0, size = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 938 | int err, i; |
| 939 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 940 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 941 | if (count < 2) |
| 942 | count = 2; |
| 943 | if (count > VIDEO_MAX_FRAME) |
| 944 | count = VIDEO_MAX_FRAME; |
| 945 | size = PAGE_ALIGN(size); |
| 946 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 947 | err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 948 | if (err < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 949 | return err; |
| 950 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 951 | count = err; |
| 952 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 953 | for (i = 0; i < count; i++) { |
| 954 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 955 | err = q->ops->buf_prepare(q, q->bufs[i], field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 956 | if (err) |
| 957 | return err; |
| 958 | list_add_tail(&q->bufs[i]->stream, &q->stream); |
| 959 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 960 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 961 | for (i = 0; i < count; i++) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 962 | q->ops->buf_queue(q, q->bufs[i]); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 963 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 964 | q->reading = 1; |
| 965 | return 0; |
| 966 | } |
| 967 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 968 | static void __videobuf_read_stop(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 969 | { |
| 970 | int i; |
| 971 | |
| 972 | videobuf_queue_cancel(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 973 | __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 974 | INIT_LIST_HEAD(&q->stream); |
| 975 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 976 | if (NULL == q->bufs[i]) |
| 977 | continue; |
| 978 | kfree(q->bufs[i]); |
| 979 | q->bufs[i] = NULL; |
| 980 | } |
| 981 | q->read_buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 982 | } |
| 983 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 984 | int videobuf_read_start(struct videobuf_queue *q) |
| 985 | { |
| 986 | int rc; |
| 987 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 988 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 989 | rc = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 990 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 991 | |
| 992 | return rc; |
| 993 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 994 | EXPORT_SYMBOL_GPL(videobuf_read_start); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 995 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 996 | void videobuf_read_stop(struct videobuf_queue *q) |
| 997 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 998 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 999 | __videobuf_read_stop(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1000 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1001 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1002 | EXPORT_SYMBOL_GPL(videobuf_read_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1003 | |
| 1004 | void videobuf_stop(struct videobuf_queue *q) |
| 1005 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1006 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1007 | |
| 1008 | if (q->streaming) |
| 1009 | __videobuf_streamoff(q); |
| 1010 | |
| 1011 | if (q->reading) |
| 1012 | __videobuf_read_stop(q); |
| 1013 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1014 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1015 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1016 | EXPORT_SYMBOL_GPL(videobuf_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1017 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1018 | ssize_t videobuf_read_stream(struct videobuf_queue *q, |
| 1019 | char __user *data, size_t count, loff_t *ppos, |
| 1020 | int vbihack, int nonblocking) |
| 1021 | { |
| 1022 | int rc, retval; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1023 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1024 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1025 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1026 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1027 | dprintk(2, "%s\n", __func__); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1028 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1029 | retval = -EBUSY; |
| 1030 | if (q->streaming) |
| 1031 | goto done; |
| 1032 | if (!q->reading) { |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 1033 | retval = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1034 | if (retval < 0) |
| 1035 | goto done; |
| 1036 | } |
| 1037 | |
| 1038 | retval = 0; |
| 1039 | while (count > 0) { |
| 1040 | /* get / wait for data */ |
| 1041 | if (NULL == q->read_buf) { |
| 1042 | q->read_buf = list_entry(q->stream.next, |
| 1043 | struct videobuf_buffer, |
| 1044 | stream); |
| 1045 | list_del(&q->read_buf->stream); |
| 1046 | q->read_off = 0; |
| 1047 | } |
| 1048 | rc = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 1049 | if (rc < 0) { |
| 1050 | if (0 == retval) |
| 1051 | retval = rc; |
| 1052 | break; |
| 1053 | } |
| 1054 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1055 | if (q->read_buf->state == VIDEOBUF_DONE) { |
Hans Verkuil | 3711103 | 2010-03-28 09:22:53 -0300 | [diff] [blame] | 1056 | rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1057 | retval, vbihack, nonblocking); |
| 1058 | if (rc < 0) { |
| 1059 | retval = rc; |
| 1060 | break; |
| 1061 | } |
| 1062 | retval += rc; |
| 1063 | count -= rc; |
| 1064 | q->read_off += rc; |
| 1065 | } else { |
| 1066 | /* some error */ |
| 1067 | q->read_off = q->read_buf->size; |
| 1068 | if (0 == retval) |
| 1069 | retval = -EIO; |
| 1070 | } |
| 1071 | |
| 1072 | /* requeue buffer when done with copying */ |
| 1073 | if (q->read_off == q->read_buf->size) { |
| 1074 | list_add_tail(&q->read_buf->stream, |
| 1075 | &q->stream); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1076 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1077 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1078 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1079 | q->read_buf = NULL; |
| 1080 | } |
| 1081 | if (retval < 0) |
| 1082 | break; |
| 1083 | } |
| 1084 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1085 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1086 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1087 | return retval; |
| 1088 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1089 | EXPORT_SYMBOL_GPL(videobuf_read_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1090 | |
| 1091 | unsigned int videobuf_poll_stream(struct file *file, |
| 1092 | struct videobuf_queue *q, |
| 1093 | poll_table *wait) |
| 1094 | { |
| 1095 | struct videobuf_buffer *buf = NULL; |
| 1096 | unsigned int rc = 0; |
| 1097 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1098 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1099 | if (q->streaming) { |
| 1100 | if (!list_empty(&q->stream)) |
| 1101 | buf = list_entry(q->stream.next, |
| 1102 | struct videobuf_buffer, stream); |
| 1103 | } else { |
| 1104 | if (!q->reading) |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 1105 | __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1106 | if (!q->reading) { |
| 1107 | rc = POLLERR; |
| 1108 | } else if (NULL == q->read_buf) { |
| 1109 | q->read_buf = list_entry(q->stream.next, |
| 1110 | struct videobuf_buffer, |
| 1111 | stream); |
| 1112 | list_del(&q->read_buf->stream); |
| 1113 | q->read_off = 0; |
| 1114 | } |
| 1115 | buf = q->read_buf; |
| 1116 | } |
| 1117 | if (!buf) |
| 1118 | rc = POLLERR; |
| 1119 | |
| 1120 | if (0 == rc) { |
| 1121 | poll_wait(file, &buf->done, wait); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1122 | if (buf->state == VIDEOBUF_DONE || |
Pawel Osciak | 9b55843 | 2010-03-29 05:16:31 -0300 | [diff] [blame] | 1123 | buf->state == VIDEOBUF_ERROR) { |
| 1124 | switch (q->type) { |
| 1125 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| 1126 | case V4L2_BUF_TYPE_VBI_OUTPUT: |
| 1127 | case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: |
| 1128 | rc = POLLOUT | POLLWRNORM; |
| 1129 | break; |
| 1130 | default: |
| 1131 | rc = POLLIN | POLLRDNORM; |
| 1132 | break; |
| 1133 | } |
| 1134 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1135 | } |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1136 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1137 | return rc; |
| 1138 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1139 | EXPORT_SYMBOL_GPL(videobuf_poll_stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1140 | |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1141 | 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] | 1142 | { |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1143 | int rc = -EINVAL; |
| 1144 | int i; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1145 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1146 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1147 | |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1148 | if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) { |
| 1149 | dprintk(1, "mmap appl bug: PROT_WRITE and MAP_SHARED are required\n"); |
| 1150 | return -EINVAL; |
| 1151 | } |
| 1152 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1153 | mutex_lock(&q->vb_lock); |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1154 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 1155 | struct videobuf_buffer *buf = q->bufs[i]; |
| 1156 | |
| 1157 | if (buf && buf->memory == V4L2_MEMORY_MMAP && |
| 1158 | buf->boff == (vma->vm_pgoff << PAGE_SHIFT)) { |
| 1159 | rc = CALL(q, mmap_mapper, q, buf, vma); |
| 1160 | break; |
| 1161 | } |
| 1162 | } |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1163 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1164 | |
Hans Verkuil | 0b62b73 | 2010-03-28 09:09:05 -0300 | [diff] [blame] | 1165 | return rc; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1166 | } |
Pawel Osciak | 7a02264 | 2010-03-17 04:01:04 -0300 | [diff] [blame] | 1167 | EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1168 | |
| 1169 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
| 1170 | int videobuf_cgmbuf(struct videobuf_queue *q, |
| 1171 | struct video_mbuf *mbuf, int count) |
| 1172 | { |
| 1173 | struct v4l2_requestbuffers req; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1174 | int rc, i; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1175 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1176 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1177 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1178 | memset(&req, 0, sizeof(req)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1179 | req.type = q->type; |
| 1180 | req.count = count; |
| 1181 | req.memory = V4L2_MEMORY_MMAP; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1182 | rc = videobuf_reqbufs(q, &req); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1183 | if (rc < 0) |
| 1184 | return rc; |
| 1185 | |
| 1186 | mbuf->frames = req.count; |
| 1187 | mbuf->size = 0; |
| 1188 | for (i = 0; i < mbuf->frames; i++) { |
| 1189 | mbuf->offsets[i] = q->bufs[i]->boff; |
Tuukka Toivonen | 7cbefad | 2009-07-23 10:56:25 -0300 | [diff] [blame] | 1190 | mbuf->size += PAGE_ALIGN(q->bufs[i]->bsize); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1191 | } |
| 1192 | |
| 1193 | return 0; |
| 1194 | } |
Pekka Enberg | a13625c | 2007-10-13 05:54:54 -0300 | [diff] [blame] | 1195 | EXPORT_SYMBOL_GPL(videobuf_cgmbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1196 | #endif |
| 1197 | |