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> |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 20 | #include <linux/slab.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | |
| 23 | #include <media/videobuf-core.h> |
| 24 | |
| 25 | #define MAGIC_BUFFER 0x20070728 |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 26 | #define MAGIC_CHECK(is, should) do { \ |
| 27 | if (unlikely((is) != (should))) { \ |
| 28 | printk(KERN_ERR "magic mismatch: %x (expected %x)\n", is, should); \ |
| 29 | BUG(); } } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 30 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 31 | static int debug; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 32 | module_param(debug, int, 0644); |
| 33 | |
| 34 | MODULE_DESCRIPTION("helper module to manage video4linux buffers"); |
| 35 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 38 | #define dprintk(level, fmt, arg...) do { \ |
| 39 | if (debug >= level) \ |
| 40 | printk(KERN_DEBUG "vbuf: " fmt , ## arg); } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 41 | |
| 42 | /* --------------------------------------------------------------------- */ |
| 43 | |
| 44 | #define CALL(q, f, arg...) \ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 45 | ((q->int_ops->f) ? q->int_ops->f(arg) : 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 46 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 47 | void *videobuf_alloc(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 48 | { |
| 49 | struct videobuf_buffer *vb; |
| 50 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 51 | BUG_ON(q->msize < sizeof(*vb)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 52 | |
| 53 | if (!q->int_ops || !q->int_ops->alloc) { |
| 54 | printk(KERN_ERR "No specific ops defined!\n"); |
| 55 | BUG(); |
| 56 | } |
| 57 | |
| 58 | vb = q->int_ops->alloc(q->msize); |
| 59 | |
| 60 | if (NULL != vb) { |
| 61 | init_waitqueue_head(&vb->done); |
| 62 | vb->magic = MAGIC_BUFFER; |
| 63 | } |
| 64 | |
| 65 | return vb; |
| 66 | } |
| 67 | |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 68 | #define WAITON_CONDITION (vb->state != VIDEOBUF_ACTIVE &&\ |
| 69 | vb->state != VIDEOBUF_QUEUED) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 70 | int videobuf_waiton(struct videobuf_buffer *vb, int non_blocking, int intr) |
| 71 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 72 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 73 | |
| 74 | if (non_blocking) { |
| 75 | if (WAITON_CONDITION) |
| 76 | return 0; |
| 77 | else |
| 78 | return -EAGAIN; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 79 | } |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 80 | |
| 81 | if (intr) |
| 82 | return wait_event_interruptible(vb->done, WAITON_CONDITION); |
| 83 | else |
| 84 | wait_event(vb->done, WAITON_CONDITION); |
| 85 | |
| 86 | return 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 87 | } |
| 88 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 89 | int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 90 | struct v4l2_framebuffer *fbuf) |
| 91 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 92 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 93 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 94 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 95 | return CALL(q, iolock, q, vb, fbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 96 | } |
| 97 | |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 98 | void *videobuf_queue_to_vmalloc (struct videobuf_queue *q, |
| 99 | struct videobuf_buffer *buf) |
| 100 | { |
Harvey Harrison | a6a3a17 | 2008-04-28 16:50:03 -0700 | [diff] [blame] | 101 | if (q->int_ops->vmalloc) |
| 102 | return q->int_ops->vmalloc(buf); |
| 103 | else |
| 104 | return NULL; |
Mauro Carvalho Chehab | 59d3448 | 2008-04-13 15:10:00 -0300 | [diff] [blame] | 105 | } |
| 106 | EXPORT_SYMBOL_GPL(videobuf_queue_to_vmalloc); |
| 107 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 108 | /* --------------------------------------------------------------------- */ |
| 109 | |
| 110 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 111 | void videobuf_queue_core_init(struct videobuf_queue *q, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 112 | struct videobuf_queue_ops *ops, |
Guennadi Liakhovetski | e9bcf66 | 2008-04-22 14:46:02 -0300 | [diff] [blame] | 113 | struct device *dev, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 114 | spinlock_t *irqlock, |
| 115 | enum v4l2_buf_type type, |
| 116 | enum v4l2_field field, |
| 117 | unsigned int msize, |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 118 | void *priv, |
| 119 | struct videobuf_qtype_ops *int_ops) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 120 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 121 | memset(q, 0, sizeof(*q)); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 122 | q->irqlock = irqlock; |
| 123 | q->dev = dev; |
| 124 | q->type = type; |
| 125 | q->field = field; |
| 126 | q->msize = msize; |
| 127 | q->ops = ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 128 | q->priv_data = priv; |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 129 | q->int_ops = int_ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 130 | |
| 131 | /* All buffer operations are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 132 | BUG_ON(!q->ops->buf_setup); |
| 133 | BUG_ON(!q->ops->buf_prepare); |
| 134 | BUG_ON(!q->ops->buf_queue); |
| 135 | BUG_ON(!q->ops->buf_release); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 136 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 137 | /* Lock is mandatory for queue_cancel to work */ |
| 138 | BUG_ON(!irqlock); |
| 139 | |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 140 | /* Having implementations for abstract methods are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 141 | BUG_ON(!q->int_ops); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 142 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 143 | mutex_init(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 144 | init_waitqueue_head(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 145 | INIT_LIST_HEAD(&q->stream); |
| 146 | } |
| 147 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 148 | /* Locking: Only usage in bttv unsafe find way to remove */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 149 | int videobuf_queue_is_busy(struct videobuf_queue *q) |
| 150 | { |
| 151 | int i; |
| 152 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 153 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 154 | |
| 155 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 156 | dprintk(1, "busy: streaming active\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 157 | return 1; |
| 158 | } |
| 159 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 160 | dprintk(1, "busy: pending read #1\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 161 | return 1; |
| 162 | } |
| 163 | if (q->read_buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 164 | dprintk(1, "busy: pending read #2\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 165 | return 1; |
| 166 | } |
| 167 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 168 | if (NULL == q->bufs[i]) |
| 169 | continue; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 170 | if (q->bufs[i]->map) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 171 | dprintk(1, "busy: buffer #%d mapped\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 172 | return 1; |
| 173 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 174 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 175 | dprintk(1, "busy: buffer #%d queued\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 176 | return 1; |
| 177 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 178 | if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 179 | dprintk(1, "busy: buffer #%d avtive\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 180 | return 1; |
| 181 | } |
| 182 | } |
| 183 | return 0; |
| 184 | } |
| 185 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 186 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 187 | void videobuf_queue_cancel(struct videobuf_queue *q) |
| 188 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 189 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 190 | int i; |
| 191 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 192 | q->streaming = 0; |
| 193 | q->reading = 0; |
| 194 | wake_up_interruptible_sync(&q->wait); |
| 195 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 196 | /* remove queued buffers from list */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 197 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 198 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 199 | if (NULL == q->bufs[i]) |
| 200 | continue; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 201 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 202 | list_del(&q->bufs[i]->queue); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 203 | q->bufs[i]->state = VIDEOBUF_ERROR; |
Brandon Philips | b608f43 | 2008-04-02 18:10:57 -0300 | [diff] [blame] | 204 | wake_up_all(&q->bufs[i]->done); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 205 | } |
| 206 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 207 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 208 | |
| 209 | /* free all buffers + clear queue */ |
| 210 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 211 | if (NULL == q->bufs[i]) |
| 212 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 213 | q->ops->buf_release(q, q->bufs[i]); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 214 | } |
| 215 | INIT_LIST_HEAD(&q->stream); |
| 216 | } |
| 217 | |
| 218 | /* --------------------------------------------------------------------- */ |
| 219 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 220 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 221 | enum v4l2_field videobuf_next_field(struct videobuf_queue *q) |
| 222 | { |
| 223 | enum v4l2_field field = q->field; |
| 224 | |
| 225 | BUG_ON(V4L2_FIELD_ANY == field); |
| 226 | |
| 227 | if (V4L2_FIELD_ALTERNATE == field) { |
| 228 | if (V4L2_FIELD_TOP == q->last) { |
| 229 | field = V4L2_FIELD_BOTTOM; |
| 230 | q->last = V4L2_FIELD_BOTTOM; |
| 231 | } else { |
| 232 | field = V4L2_FIELD_TOP; |
| 233 | q->last = V4L2_FIELD_TOP; |
| 234 | } |
| 235 | } |
| 236 | return field; |
| 237 | } |
| 238 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 239 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 240 | static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, |
| 241 | struct videobuf_buffer *vb, enum v4l2_buf_type type) |
| 242 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 243 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 244 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 245 | |
| 246 | b->index = vb->i; |
| 247 | b->type = type; |
| 248 | |
| 249 | b->memory = vb->memory; |
| 250 | switch (b->memory) { |
| 251 | case V4L2_MEMORY_MMAP: |
| 252 | b->m.offset = vb->boff; |
| 253 | b->length = vb->bsize; |
| 254 | break; |
| 255 | case V4L2_MEMORY_USERPTR: |
| 256 | b->m.userptr = vb->baddr; |
| 257 | b->length = vb->bsize; |
| 258 | break; |
| 259 | case V4L2_MEMORY_OVERLAY: |
| 260 | b->m.offset = vb->boff; |
| 261 | break; |
| 262 | } |
| 263 | |
| 264 | b->flags = 0; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 265 | if (vb->map) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 266 | b->flags |= V4L2_BUF_FLAG_MAPPED; |
| 267 | |
| 268 | switch (vb->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 269 | case VIDEOBUF_PREPARED: |
| 270 | case VIDEOBUF_QUEUED: |
| 271 | case VIDEOBUF_ACTIVE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 272 | b->flags |= V4L2_BUF_FLAG_QUEUED; |
| 273 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 274 | case VIDEOBUF_DONE: |
| 275 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 276 | b->flags |= V4L2_BUF_FLAG_DONE; |
| 277 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 278 | case VIDEOBUF_NEEDS_INIT: |
| 279 | case VIDEOBUF_IDLE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 280 | /* nothing */ |
| 281 | break; |
| 282 | } |
| 283 | |
| 284 | if (vb->input != UNSET) { |
| 285 | b->flags |= V4L2_BUF_FLAG_INPUT; |
| 286 | b->input = vb->input; |
| 287 | } |
| 288 | |
| 289 | b->field = vb->field; |
| 290 | b->timestamp = vb->ts; |
| 291 | b->bytesused = vb->size; |
| 292 | b->sequence = vb->field_count >> 1; |
| 293 | } |
| 294 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 295 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 296 | static int __videobuf_mmap_free(struct videobuf_queue *q) |
| 297 | { |
| 298 | int i; |
| 299 | int rc; |
| 300 | |
| 301 | if (!q) |
| 302 | return 0; |
| 303 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 304 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 305 | |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 306 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 307 | rc = CALL(q, mmap_free, q); |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 308 | |
| 309 | q->is_mmapped = 0; |
| 310 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 311 | if (rc < 0) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 312 | return rc; |
| 313 | |
| 314 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 315 | if (NULL == q->bufs[i]) |
| 316 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 317 | q->ops->buf_release(q, q->bufs[i]); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 318 | kfree(q->bufs[i]); |
| 319 | q->bufs[i] = NULL; |
| 320 | } |
| 321 | |
| 322 | return rc; |
| 323 | } |
| 324 | |
| 325 | int videobuf_mmap_free(struct videobuf_queue *q) |
| 326 | { |
| 327 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 328 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 329 | ret = __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 330 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 331 | return ret; |
| 332 | } |
| 333 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 334 | /* Locking: Caller holds q->vb_lock */ |
Arjan van de Ven | 81b2dbc | 2008-05-20 09:53:52 -0700 | [diff] [blame] | 335 | int __videobuf_mmap_setup(struct videobuf_queue *q, |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 336 | unsigned int bcount, unsigned int bsize, |
| 337 | enum v4l2_memory memory) |
| 338 | { |
| 339 | unsigned int i; |
| 340 | int err; |
| 341 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 342 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 343 | |
| 344 | err = __videobuf_mmap_free(q); |
| 345 | if (0 != err) |
| 346 | return err; |
| 347 | |
| 348 | /* Allocate and initialize buffers */ |
| 349 | for (i = 0; i < bcount; i++) { |
| 350 | q->bufs[i] = videobuf_alloc(q); |
| 351 | |
| 352 | if (q->bufs[i] == NULL) |
| 353 | break; |
| 354 | |
| 355 | q->bufs[i]->i = i; |
| 356 | q->bufs[i]->input = UNSET; |
| 357 | q->bufs[i]->memory = memory; |
| 358 | q->bufs[i]->bsize = bsize; |
| 359 | switch (memory) { |
| 360 | case V4L2_MEMORY_MMAP: |
| 361 | q->bufs[i]->boff = bsize * i; |
| 362 | break; |
| 363 | case V4L2_MEMORY_USERPTR: |
| 364 | case V4L2_MEMORY_OVERLAY: |
| 365 | /* nothing */ |
| 366 | break; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | if (!i) |
| 371 | return -ENOMEM; |
| 372 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 373 | dprintk(1, "mmap setup: %d buffers, %d bytes each\n", |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 374 | i, bsize); |
| 375 | |
| 376 | return i; |
| 377 | } |
| 378 | |
| 379 | int videobuf_mmap_setup(struct videobuf_queue *q, |
| 380 | unsigned int bcount, unsigned int bsize, |
| 381 | enum v4l2_memory memory) |
| 382 | { |
| 383 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 384 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 385 | ret = __videobuf_mmap_setup(q, bcount, bsize, memory); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 386 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 387 | return ret; |
| 388 | } |
| 389 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 390 | int videobuf_reqbufs(struct videobuf_queue *q, |
| 391 | struct v4l2_requestbuffers *req) |
| 392 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 393 | unsigned int size, count; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 394 | int retval; |
| 395 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 396 | if (req->count < 1) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 397 | dprintk(1, "reqbufs: count invalid (%d)\n", req->count); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 398 | return -EINVAL; |
| 399 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 400 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 401 | if (req->memory != V4L2_MEMORY_MMAP && |
| 402 | req->memory != V4L2_MEMORY_USERPTR && |
| 403 | req->memory != V4L2_MEMORY_OVERLAY) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 404 | dprintk(1, "reqbufs: memory type invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 405 | return -EINVAL; |
| 406 | } |
| 407 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 408 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 409 | if (req->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 410 | dprintk(1, "reqbufs: queue type invalid\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 411 | retval = -EINVAL; |
| 412 | goto done; |
| 413 | } |
| 414 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 415 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 416 | dprintk(1, "reqbufs: streaming already exists\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 417 | retval = -EBUSY; |
| 418 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 419 | } |
| 420 | if (!list_empty(&q->stream)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 421 | dprintk(1, "reqbufs: stream running\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 422 | retval = -EBUSY; |
| 423 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 424 | } |
| 425 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 426 | count = req->count; |
| 427 | if (count > VIDEO_MAX_FRAME) |
| 428 | count = VIDEO_MAX_FRAME; |
| 429 | size = 0; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 430 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 431 | size = PAGE_ALIGN(size); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 432 | dprintk(1, "reqbufs: bufs=%d, size=0x%x [%d pages total]\n", |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 433 | count, size, (count*size)>>PAGE_SHIFT); |
| 434 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 435 | retval = __videobuf_mmap_setup(q, count, size, req->memory); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 436 | if (retval < 0) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 437 | dprintk(1, "reqbufs: mmap setup returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 438 | goto done; |
| 439 | } |
| 440 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 441 | req->count = retval; |
Németh Márton | 925d74a | 2009-04-29 15:57:24 -0300 | [diff] [blame] | 442 | retval = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 443 | |
| 444 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 445 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 446 | return retval; |
| 447 | } |
| 448 | |
| 449 | int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
| 450 | { |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 451 | int ret = -EINVAL; |
| 452 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 453 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 454 | if (unlikely(b->type != q->type)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 455 | dprintk(1, "querybuf: Wrong type.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 456 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 457 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame^] | 458 | if (unlikely(b->index >= VIDEO_MAX_FRAME)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 459 | dprintk(1, "querybuf: index out of range.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 460 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 461 | } |
| 462 | if (unlikely(NULL == q->bufs[b->index])) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 463 | dprintk(1, "querybuf: buffer is null.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 464 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 465 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 466 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 467 | videobuf_status(q, b, q->bufs[b->index], q->type); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 468 | |
| 469 | ret = 0; |
| 470 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 471 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 472 | return ret; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | int videobuf_qbuf(struct videobuf_queue *q, |
| 476 | struct v4l2_buffer *b) |
| 477 | { |
| 478 | struct videobuf_buffer *buf; |
| 479 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 480 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 481 | int retval; |
| 482 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 483 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 484 | |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 485 | if (b->memory == V4L2_MEMORY_MMAP) |
| 486 | down_read(¤t->mm->mmap_sem); |
| 487 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 488 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 489 | retval = -EBUSY; |
| 490 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 491 | dprintk(1, "qbuf: Reading running...\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 492 | goto done; |
| 493 | } |
| 494 | retval = -EINVAL; |
| 495 | if (b->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 496 | dprintk(1, "qbuf: Wrong type.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 497 | goto done; |
| 498 | } |
Roel Kluin | 223ffe5 | 2009-05-02 16:38:47 -0300 | [diff] [blame^] | 499 | if (b->index >= VIDEO_MAX_FRAME) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 500 | dprintk(1, "qbuf: index out of range.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 501 | goto done; |
| 502 | } |
| 503 | buf = q->bufs[b->index]; |
| 504 | if (NULL == buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 505 | dprintk(1, "qbuf: buffer is null.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 506 | goto done; |
| 507 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 508 | MAGIC_CHECK(buf->magic, MAGIC_BUFFER); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 509 | if (buf->memory != b->memory) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 510 | dprintk(1, "qbuf: memory type is wrong.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 511 | goto done; |
| 512 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 513 | if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 514 | dprintk(1, "qbuf: buffer is already queued or active.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 515 | goto done; |
| 516 | } |
| 517 | |
| 518 | if (b->flags & V4L2_BUF_FLAG_INPUT) { |
| 519 | if (b->input >= q->inputs) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 520 | dprintk(1, "qbuf: wrong input.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 521 | goto done; |
| 522 | } |
| 523 | buf->input = b->input; |
| 524 | } else { |
| 525 | buf->input = UNSET; |
| 526 | } |
| 527 | |
| 528 | switch (b->memory) { |
| 529 | case V4L2_MEMORY_MMAP: |
| 530 | if (0 == buf->baddr) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 531 | dprintk(1, "qbuf: mmap requested " |
| 532 | "but buffer addr is zero!\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 533 | goto done; |
| 534 | } |
| 535 | break; |
| 536 | case V4L2_MEMORY_USERPTR: |
| 537 | if (b->length < buf->bsize) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 538 | dprintk(1, "qbuf: buffer length is not enough\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 539 | goto done; |
| 540 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 541 | if (VIDEOBUF_NEEDS_INIT != buf->state && |
| 542 | buf->baddr != b->m.userptr) |
| 543 | q->ops->buf_release(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 544 | buf->baddr = b->m.userptr; |
| 545 | break; |
| 546 | case V4L2_MEMORY_OVERLAY: |
| 547 | buf->boff = b->m.offset; |
| 548 | break; |
| 549 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 550 | dprintk(1, "qbuf: wrong memory type\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 551 | goto done; |
| 552 | } |
| 553 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 554 | dprintk(1, "qbuf: requesting next field\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 555 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 556 | retval = q->ops->buf_prepare(q, buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 557 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 558 | dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 559 | goto done; |
| 560 | } |
| 561 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 562 | list_add_tail(&buf->stream, &q->stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 563 | if (q->streaming) { |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 564 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 565 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 566 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 567 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 568 | dprintk(1, "qbuf: succeded\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 569 | retval = 0; |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 570 | wake_up_interruptible_sync(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 571 | |
| 572 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 573 | mutex_unlock(&q->vb_lock); |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 574 | |
| 575 | if (b->memory == V4L2_MEMORY_MMAP) |
| 576 | up_read(¤t->mm->mmap_sem); |
| 577 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 578 | return retval; |
| 579 | } |
| 580 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 581 | |
| 582 | /* Locking: Caller holds q->vb_lock */ |
| 583 | static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock) |
| 584 | { |
| 585 | int retval; |
| 586 | |
| 587 | checks: |
| 588 | if (!q->streaming) { |
| 589 | dprintk(1, "next_buffer: Not streaming\n"); |
| 590 | retval = -EINVAL; |
| 591 | goto done; |
| 592 | } |
| 593 | |
| 594 | if (list_empty(&q->stream)) { |
| 595 | if (noblock) { |
| 596 | retval = -EAGAIN; |
| 597 | dprintk(2, "next_buffer: no buffers to dequeue\n"); |
| 598 | goto done; |
| 599 | } else { |
| 600 | dprintk(2, "next_buffer: waiting on buffer\n"); |
| 601 | |
| 602 | /* Drop lock to avoid deadlock with qbuf */ |
| 603 | mutex_unlock(&q->vb_lock); |
| 604 | |
| 605 | /* Checking list_empty and streaming is safe without |
| 606 | * locks because we goto checks to validate while |
| 607 | * holding locks before proceeding */ |
| 608 | retval = wait_event_interruptible(q->wait, |
| 609 | !list_empty(&q->stream) || !q->streaming); |
| 610 | mutex_lock(&q->vb_lock); |
| 611 | |
| 612 | if (retval) |
| 613 | goto done; |
| 614 | |
| 615 | goto checks; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | retval = 0; |
| 620 | |
| 621 | done: |
| 622 | return retval; |
| 623 | } |
| 624 | |
| 625 | |
| 626 | /* Locking: Caller holds q->vb_lock */ |
| 627 | static int stream_next_buffer(struct videobuf_queue *q, |
| 628 | struct videobuf_buffer **vb, int nonblocking) |
| 629 | { |
| 630 | int retval; |
| 631 | struct videobuf_buffer *buf = NULL; |
| 632 | |
| 633 | retval = stream_next_buffer_check_queue(q, nonblocking); |
| 634 | if (retval) |
| 635 | goto done; |
| 636 | |
| 637 | buf = list_entry(q->stream.next, struct videobuf_buffer, stream); |
| 638 | retval = videobuf_waiton(buf, nonblocking, 1); |
| 639 | if (retval < 0) |
| 640 | goto done; |
| 641 | |
| 642 | *vb = buf; |
| 643 | done: |
| 644 | return retval; |
| 645 | } |
| 646 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 647 | int videobuf_dqbuf(struct videobuf_queue *q, |
| 648 | struct v4l2_buffer *b, int nonblocking) |
| 649 | { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 650 | struct videobuf_buffer *buf = NULL; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 651 | int retval; |
| 652 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 653 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 654 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 655 | mutex_lock(&q->vb_lock); |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 656 | |
| 657 | retval = stream_next_buffer(q, &buf, nonblocking); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 658 | if (retval < 0) { |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 659 | dprintk(1, "dqbuf: next_buffer error: %i\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 660 | goto done; |
| 661 | } |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 662 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 663 | switch (buf->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 664 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 665 | dprintk(1, "dqbuf: state is error\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 666 | retval = -EIO; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 667 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 668 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 669 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 670 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 671 | dprintk(1, "dqbuf: state is done\n"); |
| 672 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 673 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 674 | break; |
| 675 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 676 | dprintk(1, "dqbuf: state invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 677 | retval = -EINVAL; |
| 678 | goto done; |
| 679 | } |
| 680 | list_del(&buf->stream); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 681 | memset(b, 0, sizeof(*b)); |
| 682 | videobuf_status(q, b, buf, q->type); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 683 | |
| 684 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 685 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 686 | return retval; |
| 687 | } |
| 688 | |
| 689 | int videobuf_streamon(struct videobuf_queue *q) |
| 690 | { |
| 691 | struct videobuf_buffer *buf; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 692 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 693 | int retval; |
| 694 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 695 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 696 | retval = -EBUSY; |
| 697 | if (q->reading) |
| 698 | goto done; |
| 699 | retval = 0; |
| 700 | if (q->streaming) |
| 701 | goto done; |
| 702 | q->streaming = 1; |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 703 | spin_lock_irqsave(q->irqlock, flags); |
Trent Piepho | a991f44 | 2007-10-10 05:37:43 -0300 | [diff] [blame] | 704 | list_for_each_entry(buf, &q->stream, stream) |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 705 | if (buf->state == VIDEOBUF_PREPARED) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 706 | q->ops->buf_queue(q, buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 707 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 708 | |
Brandon Philips | 137d1cb | 2008-04-02 18:10:59 -0300 | [diff] [blame] | 709 | wake_up_interruptible_sync(&q->wait); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 710 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 711 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 712 | return retval; |
| 713 | } |
| 714 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 715 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 716 | static int __videobuf_streamoff(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 717 | { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 718 | if (!q->streaming) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 719 | return -EINVAL; |
| 720 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 721 | videobuf_queue_cancel(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 722 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 723 | return 0; |
| 724 | } |
| 725 | |
| 726 | int videobuf_streamoff(struct videobuf_queue *q) |
| 727 | { |
| 728 | int retval; |
| 729 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 730 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 731 | retval = __videobuf_streamoff(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 732 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 733 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 734 | return retval; |
| 735 | } |
| 736 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 737 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 738 | static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, |
| 739 | char __user *data, |
| 740 | size_t count, loff_t *ppos) |
| 741 | { |
| 742 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 743 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 744 | int retval; |
| 745 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 746 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 747 | |
| 748 | /* setup stuff */ |
| 749 | q->read_buf = videobuf_alloc(q); |
| 750 | if (NULL == q->read_buf) |
| 751 | return -ENOMEM; |
| 752 | |
| 753 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 754 | q->read_buf->baddr = (unsigned long)data; |
| 755 | q->read_buf->bsize = count; |
| 756 | |
| 757 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 758 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 759 | if (0 != retval) |
| 760 | goto done; |
| 761 | |
| 762 | /* start capture & wait */ |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 763 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 764 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 765 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 766 | retval = videobuf_waiton(q->read_buf, 0, 0); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 767 | if (0 == retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 768 | CALL(q, sync, q, q->read_buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 769 | if (VIDEOBUF_ERROR == q->read_buf->state) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 770 | retval = -EIO; |
| 771 | else |
| 772 | retval = q->read_buf->size; |
| 773 | } |
| 774 | |
| 775 | done: |
| 776 | /* cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 777 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 778 | kfree(q->read_buf); |
| 779 | q->read_buf = NULL; |
| 780 | return retval; |
| 781 | } |
| 782 | |
| 783 | ssize_t videobuf_read_one(struct videobuf_queue *q, |
| 784 | char __user *data, size_t count, loff_t *ppos, |
| 785 | int nonblocking) |
| 786 | { |
| 787 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 788 | unsigned long flags = 0; |
Guennadi Liakhovetski | 7daa4a8 | 2008-04-22 14:46:03 -0300 | [diff] [blame] | 789 | unsigned size = 0, nbufs = 1; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 790 | int retval; |
| 791 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 792 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 793 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 794 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 795 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 796 | q->ops->buf_setup(q, &nbufs, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 797 | |
| 798 | if (NULL == q->read_buf && |
| 799 | count >= size && |
| 800 | !nonblocking) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 801 | retval = videobuf_read_zerocopy(q, data, count, ppos); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 802 | if (retval >= 0 || retval == -EIO) |
| 803 | /* ok, all done */ |
| 804 | goto done; |
| 805 | /* fallback to kernel bounce buffer on failures */ |
| 806 | } |
| 807 | |
| 808 | if (NULL == q->read_buf) { |
| 809 | /* need to capture a new frame */ |
| 810 | retval = -ENOMEM; |
| 811 | q->read_buf = videobuf_alloc(q); |
| 812 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 813 | dprintk(1, "video alloc=0x%p\n", q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 814 | if (NULL == q->read_buf) |
| 815 | goto done; |
| 816 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 817 | q->read_buf->bsize = count; /* preferred size */ |
| 818 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 819 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 820 | |
| 821 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 822 | kfree(q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 823 | q->read_buf = NULL; |
| 824 | goto done; |
| 825 | } |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 826 | |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 827 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 828 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 829 | spin_unlock_irqrestore(q->irqlock, flags); |
| 830 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 831 | q->read_off = 0; |
| 832 | } |
| 833 | |
| 834 | /* wait until capture is done */ |
| 835 | retval = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 836 | if (0 != retval) |
| 837 | goto done; |
| 838 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 839 | CALL(q, sync, q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 840 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 841 | if (VIDEOBUF_ERROR == q->read_buf->state) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 842 | /* catch I/O errors */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 843 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 844 | kfree(q->read_buf); |
| 845 | q->read_buf = NULL; |
| 846 | retval = -EIO; |
| 847 | goto done; |
| 848 | } |
| 849 | |
| 850 | /* Copy to userspace */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 851 | retval = CALL(q, video_copy_to_user, q, data, count, nonblocking); |
| 852 | if (retval < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 853 | goto done; |
| 854 | |
| 855 | q->read_off += retval; |
| 856 | if (q->read_off == q->read_buf->size) { |
| 857 | /* all data copied, cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 858 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 859 | kfree(q->read_buf); |
| 860 | q->read_buf = NULL; |
| 861 | } |
| 862 | |
| 863 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 864 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 865 | return retval; |
| 866 | } |
| 867 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 868 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 225ba90 | 2007-12-12 21:46:26 -0300 | [diff] [blame] | 869 | static int __videobuf_read_start(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 870 | { |
| 871 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 872 | unsigned long flags = 0; |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 873 | unsigned int count = 0, size = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 874 | int err, i; |
| 875 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 876 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 877 | if (count < 2) |
| 878 | count = 2; |
| 879 | if (count > VIDEO_MAX_FRAME) |
| 880 | count = VIDEO_MAX_FRAME; |
| 881 | size = PAGE_ALIGN(size); |
| 882 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 883 | err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 884 | if (err < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 885 | return err; |
| 886 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 887 | count = err; |
| 888 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 889 | for (i = 0; i < count; i++) { |
| 890 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 891 | err = q->ops->buf_prepare(q, q->bufs[i], field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 892 | if (err) |
| 893 | return err; |
| 894 | list_add_tail(&q->bufs[i]->stream, &q->stream); |
| 895 | } |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 896 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 897 | for (i = 0; i < count; i++) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 898 | q->ops->buf_queue(q, q->bufs[i]); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 899 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 900 | q->reading = 1; |
| 901 | return 0; |
| 902 | } |
| 903 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 904 | static void __videobuf_read_stop(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 905 | { |
| 906 | int i; |
| 907 | |
| 908 | videobuf_queue_cancel(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 909 | __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 910 | INIT_LIST_HEAD(&q->stream); |
| 911 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 912 | if (NULL == q->bufs[i]) |
| 913 | continue; |
| 914 | kfree(q->bufs[i]); |
| 915 | q->bufs[i] = NULL; |
| 916 | } |
| 917 | q->read_buf = NULL; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 918 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 919 | } |
| 920 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 921 | int videobuf_read_start(struct videobuf_queue *q) |
| 922 | { |
| 923 | int rc; |
| 924 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 925 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 926 | rc = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 927 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 928 | |
| 929 | return rc; |
| 930 | } |
| 931 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 932 | void videobuf_read_stop(struct videobuf_queue *q) |
| 933 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 934 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 935 | __videobuf_read_stop(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 936 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | void videobuf_stop(struct videobuf_queue *q) |
| 940 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 941 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 942 | |
| 943 | if (q->streaming) |
| 944 | __videobuf_streamoff(q); |
| 945 | |
| 946 | if (q->reading) |
| 947 | __videobuf_read_stop(q); |
| 948 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 949 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 950 | } |
| 951 | |
| 952 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 953 | ssize_t videobuf_read_stream(struct videobuf_queue *q, |
| 954 | char __user *data, size_t count, loff_t *ppos, |
| 955 | int vbihack, int nonblocking) |
| 956 | { |
| 957 | int rc, retval; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 958 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 959 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 960 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 961 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 962 | dprintk(2, "%s\n", __func__); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 963 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 964 | retval = -EBUSY; |
| 965 | if (q->streaming) |
| 966 | goto done; |
| 967 | if (!q->reading) { |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 968 | retval = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 969 | if (retval < 0) |
| 970 | goto done; |
| 971 | } |
| 972 | |
| 973 | retval = 0; |
| 974 | while (count > 0) { |
| 975 | /* get / wait for data */ |
| 976 | if (NULL == q->read_buf) { |
| 977 | q->read_buf = list_entry(q->stream.next, |
| 978 | struct videobuf_buffer, |
| 979 | stream); |
| 980 | list_del(&q->read_buf->stream); |
| 981 | q->read_off = 0; |
| 982 | } |
| 983 | rc = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 984 | if (rc < 0) { |
| 985 | if (0 == retval) |
| 986 | retval = rc; |
| 987 | break; |
| 988 | } |
| 989 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 990 | if (q->read_buf->state == VIDEOBUF_DONE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 991 | rc = CALL(q, copy_stream, q, data + retval, count, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 992 | retval, vbihack, nonblocking); |
| 993 | if (rc < 0) { |
| 994 | retval = rc; |
| 995 | break; |
| 996 | } |
| 997 | retval += rc; |
| 998 | count -= rc; |
| 999 | q->read_off += rc; |
| 1000 | } else { |
| 1001 | /* some error */ |
| 1002 | q->read_off = q->read_buf->size; |
| 1003 | if (0 == retval) |
| 1004 | retval = -EIO; |
| 1005 | } |
| 1006 | |
| 1007 | /* requeue buffer when done with copying */ |
| 1008 | if (q->read_off == q->read_buf->size) { |
| 1009 | list_add_tail(&q->read_buf->stream, |
| 1010 | &q->stream); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1011 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1012 | q->ops->buf_queue(q, q->read_buf); |
Brandon Philips | 0cf4dae | 2008-03-28 10:18:33 -0700 | [diff] [blame] | 1013 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1014 | q->read_buf = NULL; |
| 1015 | } |
| 1016 | if (retval < 0) |
| 1017 | break; |
| 1018 | } |
| 1019 | |
| 1020 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1021 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1022 | return retval; |
| 1023 | } |
| 1024 | |
| 1025 | unsigned int videobuf_poll_stream(struct file *file, |
| 1026 | struct videobuf_queue *q, |
| 1027 | poll_table *wait) |
| 1028 | { |
| 1029 | struct videobuf_buffer *buf = NULL; |
| 1030 | unsigned int rc = 0; |
| 1031 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1032 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1033 | if (q->streaming) { |
| 1034 | if (!list_empty(&q->stream)) |
| 1035 | buf = list_entry(q->stream.next, |
| 1036 | struct videobuf_buffer, stream); |
| 1037 | } else { |
| 1038 | if (!q->reading) |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 1039 | __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1040 | if (!q->reading) { |
| 1041 | rc = POLLERR; |
| 1042 | } else if (NULL == q->read_buf) { |
| 1043 | q->read_buf = list_entry(q->stream.next, |
| 1044 | struct videobuf_buffer, |
| 1045 | stream); |
| 1046 | list_del(&q->read_buf->stream); |
| 1047 | q->read_off = 0; |
| 1048 | } |
| 1049 | buf = q->read_buf; |
| 1050 | } |
| 1051 | if (!buf) |
| 1052 | rc = POLLERR; |
| 1053 | |
| 1054 | if (0 == rc) { |
| 1055 | poll_wait(file, &buf->done, wait); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1056 | if (buf->state == VIDEOBUF_DONE || |
| 1057 | buf->state == VIDEOBUF_ERROR) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1058 | rc = POLLIN|POLLRDNORM; |
| 1059 | } |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1060 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1061 | return rc; |
| 1062 | } |
| 1063 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1064 | int videobuf_mmap_mapper(struct videobuf_queue *q, |
| 1065 | struct vm_area_struct *vma) |
| 1066 | { |
| 1067 | int retval; |
| 1068 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1069 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1070 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1071 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1072 | retval = CALL(q, mmap_mapper, q, vma); |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 1073 | q->is_mmapped = 1; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1074 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1075 | |
| 1076 | return retval; |
| 1077 | } |
| 1078 | |
| 1079 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
| 1080 | int videobuf_cgmbuf(struct videobuf_queue *q, |
| 1081 | struct video_mbuf *mbuf, int count) |
| 1082 | { |
| 1083 | struct v4l2_requestbuffers req; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1084 | int rc, i; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1085 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1086 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1087 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1088 | memset(&req, 0, sizeof(req)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1089 | req.type = q->type; |
| 1090 | req.count = count; |
| 1091 | req.memory = V4L2_MEMORY_MMAP; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1092 | rc = videobuf_reqbufs(q, &req); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1093 | if (rc < 0) |
| 1094 | return rc; |
| 1095 | |
| 1096 | mbuf->frames = req.count; |
| 1097 | mbuf->size = 0; |
| 1098 | for (i = 0; i < mbuf->frames; i++) { |
| 1099 | mbuf->offsets[i] = q->bufs[i]->boff; |
| 1100 | mbuf->size += q->bufs[i]->bsize; |
| 1101 | } |
| 1102 | |
| 1103 | return 0; |
| 1104 | } |
Pekka Enberg | a13625c | 2007-10-13 05:54:54 -0300 | [diff] [blame] | 1105 | EXPORT_SYMBOL_GPL(videobuf_cgmbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1106 | #endif |
| 1107 | |
| 1108 | /* --------------------------------------------------------------------- */ |
| 1109 | |
| 1110 | EXPORT_SYMBOL_GPL(videobuf_waiton); |
| 1111 | EXPORT_SYMBOL_GPL(videobuf_iolock); |
| 1112 | |
| 1113 | EXPORT_SYMBOL_GPL(videobuf_alloc); |
| 1114 | |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 1115 | EXPORT_SYMBOL_GPL(videobuf_queue_core_init); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1116 | EXPORT_SYMBOL_GPL(videobuf_queue_cancel); |
| 1117 | EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); |
| 1118 | |
| 1119 | EXPORT_SYMBOL_GPL(videobuf_next_field); |
| 1120 | EXPORT_SYMBOL_GPL(videobuf_reqbufs); |
| 1121 | EXPORT_SYMBOL_GPL(videobuf_querybuf); |
| 1122 | EXPORT_SYMBOL_GPL(videobuf_qbuf); |
| 1123 | EXPORT_SYMBOL_GPL(videobuf_dqbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1124 | EXPORT_SYMBOL_GPL(videobuf_streamon); |
| 1125 | EXPORT_SYMBOL_GPL(videobuf_streamoff); |
| 1126 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 1127 | EXPORT_SYMBOL_GPL(videobuf_read_start); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1128 | EXPORT_SYMBOL_GPL(videobuf_read_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1129 | EXPORT_SYMBOL_GPL(videobuf_stop); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1130 | EXPORT_SYMBOL_GPL(videobuf_read_stream); |
| 1131 | EXPORT_SYMBOL_GPL(videobuf_read_one); |
| 1132 | EXPORT_SYMBOL_GPL(videobuf_poll_stream); |
| 1133 | |
Arjan van de Ven | 81b2dbc | 2008-05-20 09:53:52 -0700 | [diff] [blame] | 1134 | EXPORT_SYMBOL_GPL(__videobuf_mmap_setup); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1135 | EXPORT_SYMBOL_GPL(videobuf_mmap_setup); |
| 1136 | EXPORT_SYMBOL_GPL(videobuf_mmap_free); |
| 1137 | EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); |