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> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | |
| 22 | #include <media/videobuf-core.h> |
| 23 | |
| 24 | #define MAGIC_BUFFER 0x20070728 |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 25 | #define MAGIC_CHECK(is, should) do { \ |
| 26 | if (unlikely((is) != (should))) { \ |
| 27 | printk(KERN_ERR "magic mismatch: %x (expected %x)\n", is, should); \ |
| 28 | BUG(); } } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 29 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 30 | static int debug; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 31 | module_param(debug, int, 0644); |
| 32 | |
| 33 | MODULE_DESCRIPTION("helper module to manage video4linux buffers"); |
| 34 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); |
| 35 | MODULE_LICENSE("GPL"); |
| 36 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 37 | #define dprintk(level, fmt, arg...) do { \ |
| 38 | if (debug >= level) \ |
| 39 | printk(KERN_DEBUG "vbuf: " fmt , ## arg); } while (0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 40 | |
| 41 | /* --------------------------------------------------------------------- */ |
| 42 | |
| 43 | #define CALL(q, f, arg...) \ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 44 | ((q->int_ops->f) ? q->int_ops->f(arg) : 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 45 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 46 | void *videobuf_alloc(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 47 | { |
| 48 | struct videobuf_buffer *vb; |
| 49 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 50 | BUG_ON(q->msize < sizeof(*vb)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 51 | |
| 52 | if (!q->int_ops || !q->int_ops->alloc) { |
| 53 | printk(KERN_ERR "No specific ops defined!\n"); |
| 54 | BUG(); |
| 55 | } |
| 56 | |
| 57 | vb = q->int_ops->alloc(q->msize); |
| 58 | |
| 59 | if (NULL != vb) { |
| 60 | init_waitqueue_head(&vb->done); |
| 61 | vb->magic = MAGIC_BUFFER; |
| 62 | } |
| 63 | |
| 64 | return vb; |
| 65 | } |
| 66 | |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame^] | 67 | #define WAITON_CONDITION (vb->state != VIDEOBUF_ACTIVE &&\ |
| 68 | vb->state != VIDEOBUF_QUEUED) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 69 | int videobuf_waiton(struct videobuf_buffer *vb, int non_blocking, int intr) |
| 70 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 71 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame^] | 72 | |
| 73 | if (non_blocking) { |
| 74 | if (WAITON_CONDITION) |
| 75 | return 0; |
| 76 | else |
| 77 | return -EAGAIN; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 78 | } |
Brandon Philips | 009a905 | 2008-04-02 18:10:59 -0300 | [diff] [blame^] | 79 | |
| 80 | if (intr) |
| 81 | return wait_event_interruptible(vb->done, WAITON_CONDITION); |
| 82 | else |
| 83 | wait_event(vb->done, WAITON_CONDITION); |
| 84 | |
| 85 | return 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 86 | } |
| 87 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 88 | int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 89 | struct v4l2_framebuffer *fbuf) |
| 90 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 91 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 92 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 93 | |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 94 | /* This is required to avoid OOPS on some cases, |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 95 | since mmap_mapper() method should be called before _iolock. |
Mauro Carvalho Chehab | d5f1b01 | 2007-10-08 11:48:57 -0300 | [diff] [blame] | 96 | On some cases, the mmap_mapper() is called only after scheduling. |
Mauro Carvalho Chehab | d5f1b01 | 2007-10-08 11:48:57 -0300 | [diff] [blame] | 97 | */ |
Mauro Carvalho Chehab | 1f8d300 | 2008-01-13 19:40:30 -0300 | [diff] [blame] | 98 | if (vb->memory == V4L2_MEMORY_MMAP) { |
| 99 | wait_event_timeout(vb->done, q->is_mmapped, |
| 100 | msecs_to_jiffies(100)); |
| 101 | if (!q->is_mmapped) { |
| 102 | printk(KERN_ERR |
| 103 | "Error: mmap_mapper() never called!\n"); |
| 104 | return -EINVAL; |
| 105 | } |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 106 | } |
Mauro Carvalho Chehab | d5f1b01 | 2007-10-08 11:48:57 -0300 | [diff] [blame] | 107 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 108 | return CALL(q, iolock, q, vb, fbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | /* --------------------------------------------------------------------- */ |
| 112 | |
| 113 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 114 | void videobuf_queue_core_init(struct videobuf_queue *q, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 115 | struct videobuf_queue_ops *ops, |
Guennadi Liakhovetski | e9bcf66 | 2008-04-22 14:46:02 -0300 | [diff] [blame] | 116 | struct device *dev, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 117 | spinlock_t *irqlock, |
| 118 | enum v4l2_buf_type type, |
| 119 | enum v4l2_field field, |
| 120 | unsigned int msize, |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 121 | void *priv, |
| 122 | struct videobuf_qtype_ops *int_ops) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 123 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 124 | memset(q, 0, sizeof(*q)); |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 125 | q->irqlock = irqlock; |
| 126 | q->dev = dev; |
| 127 | q->type = type; |
| 128 | q->field = field; |
| 129 | q->msize = msize; |
| 130 | q->ops = ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 131 | q->priv_data = priv; |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 132 | q->int_ops = int_ops; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 133 | |
| 134 | /* All buffer operations are mandatory */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 135 | BUG_ON(!q->ops->buf_setup); |
| 136 | BUG_ON(!q->ops->buf_prepare); |
| 137 | BUG_ON(!q->ops->buf_queue); |
| 138 | BUG_ON(!q->ops->buf_release); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 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); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 144 | INIT_LIST_HEAD(&q->stream); |
| 145 | } |
| 146 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 147 | /* Locking: Only usage in bttv unsafe find way to remove */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 148 | int videobuf_queue_is_busy(struct videobuf_queue *q) |
| 149 | { |
| 150 | int i; |
| 151 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 152 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 153 | |
| 154 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 155 | dprintk(1, "busy: streaming active\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 156 | return 1; |
| 157 | } |
| 158 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 159 | dprintk(1, "busy: pending read #1\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 160 | return 1; |
| 161 | } |
| 162 | if (q->read_buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 163 | dprintk(1, "busy: pending read #2\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 164 | return 1; |
| 165 | } |
| 166 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 167 | if (NULL == q->bufs[i]) |
| 168 | continue; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 169 | if (q->bufs[i]->map) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 170 | dprintk(1, "busy: buffer #%d mapped\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 171 | return 1; |
| 172 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 173 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 174 | dprintk(1, "busy: buffer #%d queued\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 175 | return 1; |
| 176 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 177 | if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 178 | dprintk(1, "busy: buffer #%d avtive\n", i); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 179 | return 1; |
| 180 | } |
| 181 | } |
| 182 | return 0; |
| 183 | } |
| 184 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 185 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 186 | void videobuf_queue_cancel(struct videobuf_queue *q) |
| 187 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 188 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 189 | int i; |
| 190 | |
| 191 | /* remove queued buffers from list */ |
| 192 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 193 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 194 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 195 | if (NULL == q->bufs[i]) |
| 196 | continue; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 197 | if (q->bufs[i]->state == VIDEOBUF_QUEUED) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 198 | list_del(&q->bufs[i]->queue); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 199 | q->bufs[i]->state = VIDEOBUF_ERROR; |
Brandon Philips | b608f43 | 2008-04-02 18:10:57 -0300 | [diff] [blame] | 200 | wake_up_all(&q->bufs[i]->done); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 201 | } |
| 202 | } |
| 203 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 204 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 205 | |
| 206 | /* free all buffers + clear queue */ |
| 207 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 208 | if (NULL == q->bufs[i]) |
| 209 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 210 | q->ops->buf_release(q, q->bufs[i]); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 211 | } |
| 212 | INIT_LIST_HEAD(&q->stream); |
| 213 | } |
| 214 | |
| 215 | /* --------------------------------------------------------------------- */ |
| 216 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 217 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 218 | enum v4l2_field videobuf_next_field(struct videobuf_queue *q) |
| 219 | { |
| 220 | enum v4l2_field field = q->field; |
| 221 | |
| 222 | BUG_ON(V4L2_FIELD_ANY == field); |
| 223 | |
| 224 | if (V4L2_FIELD_ALTERNATE == field) { |
| 225 | if (V4L2_FIELD_TOP == q->last) { |
| 226 | field = V4L2_FIELD_BOTTOM; |
| 227 | q->last = V4L2_FIELD_BOTTOM; |
| 228 | } else { |
| 229 | field = V4L2_FIELD_TOP; |
| 230 | q->last = V4L2_FIELD_TOP; |
| 231 | } |
| 232 | } |
| 233 | return field; |
| 234 | } |
| 235 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 236 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 237 | static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, |
| 238 | struct videobuf_buffer *vb, enum v4l2_buf_type type) |
| 239 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 240 | MAGIC_CHECK(vb->magic, MAGIC_BUFFER); |
| 241 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 242 | |
| 243 | b->index = vb->i; |
| 244 | b->type = type; |
| 245 | |
| 246 | b->memory = vb->memory; |
| 247 | switch (b->memory) { |
| 248 | case V4L2_MEMORY_MMAP: |
| 249 | b->m.offset = vb->boff; |
| 250 | b->length = vb->bsize; |
| 251 | break; |
| 252 | case V4L2_MEMORY_USERPTR: |
| 253 | b->m.userptr = vb->baddr; |
| 254 | b->length = vb->bsize; |
| 255 | break; |
| 256 | case V4L2_MEMORY_OVERLAY: |
| 257 | b->m.offset = vb->boff; |
| 258 | break; |
| 259 | } |
| 260 | |
| 261 | b->flags = 0; |
Mauro Carvalho Chehab | 851c0c9 | 2007-09-27 18:25:44 -0300 | [diff] [blame] | 262 | if (vb->map) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 263 | b->flags |= V4L2_BUF_FLAG_MAPPED; |
| 264 | |
| 265 | switch (vb->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 266 | case VIDEOBUF_PREPARED: |
| 267 | case VIDEOBUF_QUEUED: |
| 268 | case VIDEOBUF_ACTIVE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 269 | b->flags |= V4L2_BUF_FLAG_QUEUED; |
| 270 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 271 | case VIDEOBUF_DONE: |
| 272 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 273 | b->flags |= V4L2_BUF_FLAG_DONE; |
| 274 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 275 | case VIDEOBUF_NEEDS_INIT: |
| 276 | case VIDEOBUF_IDLE: |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 277 | /* nothing */ |
| 278 | break; |
| 279 | } |
| 280 | |
| 281 | if (vb->input != UNSET) { |
| 282 | b->flags |= V4L2_BUF_FLAG_INPUT; |
| 283 | b->input = vb->input; |
| 284 | } |
| 285 | |
| 286 | b->field = vb->field; |
| 287 | b->timestamp = vb->ts; |
| 288 | b->bytesused = vb->size; |
| 289 | b->sequence = vb->field_count >> 1; |
| 290 | } |
| 291 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 292 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 293 | static int __videobuf_mmap_free(struct videobuf_queue *q) |
| 294 | { |
| 295 | int i; |
| 296 | int rc; |
| 297 | |
| 298 | if (!q) |
| 299 | return 0; |
| 300 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 301 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 302 | |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 303 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 304 | rc = CALL(q, mmap_free, q); |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 305 | |
| 306 | q->is_mmapped = 0; |
| 307 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 308 | if (rc < 0) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 309 | return rc; |
| 310 | |
| 311 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 312 | if (NULL == q->bufs[i]) |
| 313 | continue; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 314 | q->ops->buf_release(q, q->bufs[i]); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 315 | kfree(q->bufs[i]); |
| 316 | q->bufs[i] = NULL; |
| 317 | } |
| 318 | |
| 319 | return rc; |
| 320 | } |
| 321 | |
| 322 | int videobuf_mmap_free(struct videobuf_queue *q) |
| 323 | { |
| 324 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 325 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 326 | ret = __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 327 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 328 | return ret; |
| 329 | } |
| 330 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 331 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 332 | static int __videobuf_mmap_setup(struct videobuf_queue *q, |
| 333 | unsigned int bcount, unsigned int bsize, |
| 334 | enum v4l2_memory memory) |
| 335 | { |
| 336 | unsigned int i; |
| 337 | int err; |
| 338 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 339 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 340 | |
| 341 | err = __videobuf_mmap_free(q); |
| 342 | if (0 != err) |
| 343 | return err; |
| 344 | |
| 345 | /* Allocate and initialize buffers */ |
| 346 | for (i = 0; i < bcount; i++) { |
| 347 | q->bufs[i] = videobuf_alloc(q); |
| 348 | |
| 349 | if (q->bufs[i] == NULL) |
| 350 | break; |
| 351 | |
| 352 | q->bufs[i]->i = i; |
| 353 | q->bufs[i]->input = UNSET; |
| 354 | q->bufs[i]->memory = memory; |
| 355 | q->bufs[i]->bsize = bsize; |
| 356 | switch (memory) { |
| 357 | case V4L2_MEMORY_MMAP: |
| 358 | q->bufs[i]->boff = bsize * i; |
| 359 | break; |
| 360 | case V4L2_MEMORY_USERPTR: |
| 361 | case V4L2_MEMORY_OVERLAY: |
| 362 | /* nothing */ |
| 363 | break; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | if (!i) |
| 368 | return -ENOMEM; |
| 369 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 370 | dprintk(1, "mmap setup: %d buffers, %d bytes each\n", |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 371 | i, bsize); |
| 372 | |
| 373 | return i; |
| 374 | } |
| 375 | |
| 376 | int videobuf_mmap_setup(struct videobuf_queue *q, |
| 377 | unsigned int bcount, unsigned int bsize, |
| 378 | enum v4l2_memory memory) |
| 379 | { |
| 380 | int ret; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 381 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 382 | ret = __videobuf_mmap_setup(q, bcount, bsize, memory); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 383 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 384 | return ret; |
| 385 | } |
| 386 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 387 | int videobuf_reqbufs(struct videobuf_queue *q, |
| 388 | struct v4l2_requestbuffers *req) |
| 389 | { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 390 | unsigned int size, count; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 391 | int retval; |
| 392 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 393 | if (req->count < 1) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 394 | dprintk(1, "reqbufs: count invalid (%d)\n", req->count); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 395 | return -EINVAL; |
| 396 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 397 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 398 | if (req->memory != V4L2_MEMORY_MMAP && |
| 399 | req->memory != V4L2_MEMORY_USERPTR && |
| 400 | req->memory != V4L2_MEMORY_OVERLAY) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 401 | dprintk(1, "reqbufs: memory type invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 402 | return -EINVAL; |
| 403 | } |
| 404 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 405 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 406 | if (req->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 407 | dprintk(1, "reqbufs: queue type invalid\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 408 | retval = -EINVAL; |
| 409 | goto done; |
| 410 | } |
| 411 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 412 | if (q->streaming) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 413 | dprintk(1, "reqbufs: streaming already exists\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 414 | retval = -EBUSY; |
| 415 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 416 | } |
| 417 | if (!list_empty(&q->stream)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 418 | dprintk(1, "reqbufs: stream running\n"); |
Brandon Philips | 00f98d0 | 2007-09-27 20:55:28 -0300 | [diff] [blame] | 419 | retval = -EBUSY; |
| 420 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 421 | } |
| 422 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 423 | count = req->count; |
| 424 | if (count > VIDEO_MAX_FRAME) |
| 425 | count = VIDEO_MAX_FRAME; |
| 426 | size = 0; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 427 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 428 | size = PAGE_ALIGN(size); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 429 | 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] | 430 | count, size, (count*size)>>PAGE_SHIFT); |
| 431 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 432 | retval = __videobuf_mmap_setup(q, count, size, req->memory); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 433 | if (retval < 0) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 434 | dprintk(1, "reqbufs: mmap setup returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 435 | goto done; |
| 436 | } |
| 437 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 438 | req->count = retval; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 439 | |
| 440 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 441 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 442 | return retval; |
| 443 | } |
| 444 | |
| 445 | int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) |
| 446 | { |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 447 | int ret = -EINVAL; |
| 448 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 449 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 450 | if (unlikely(b->type != q->type)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 451 | dprintk(1, "querybuf: Wrong type.\n"); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 452 | goto done; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 453 | } |
| 454 | if (unlikely(b->index < 0 || b->index >= VIDEO_MAX_FRAME)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 455 | dprintk(1, "querybuf: index out of range.\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 | } |
| 458 | if (unlikely(NULL == q->bufs[b->index])) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 459 | dprintk(1, "querybuf: buffer is null.\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 | } |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 462 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 463 | videobuf_status(q, b, q->bufs[b->index], q->type); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 464 | |
| 465 | ret = 0; |
| 466 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 467 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 468 | return ret; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | int videobuf_qbuf(struct videobuf_queue *q, |
| 472 | struct v4l2_buffer *b) |
| 473 | { |
| 474 | struct videobuf_buffer *buf; |
| 475 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 476 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 477 | int retval; |
| 478 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 479 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 480 | |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 481 | if (b->memory == V4L2_MEMORY_MMAP) |
| 482 | down_read(¤t->mm->mmap_sem); |
| 483 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 484 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 485 | retval = -EBUSY; |
| 486 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 487 | dprintk(1, "qbuf: Reading running...\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 488 | goto done; |
| 489 | } |
| 490 | retval = -EINVAL; |
| 491 | if (b->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 492 | dprintk(1, "qbuf: Wrong type.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 493 | goto done; |
| 494 | } |
| 495 | if (b->index < 0 || b->index >= VIDEO_MAX_FRAME) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 496 | dprintk(1, "qbuf: index out of range.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 497 | goto done; |
| 498 | } |
| 499 | buf = q->bufs[b->index]; |
| 500 | if (NULL == buf) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 501 | dprintk(1, "qbuf: buffer is null.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 502 | goto done; |
| 503 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 504 | MAGIC_CHECK(buf->magic, MAGIC_BUFFER); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 505 | if (buf->memory != b->memory) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 506 | dprintk(1, "qbuf: memory type is wrong.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 507 | goto done; |
| 508 | } |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 509 | if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 510 | dprintk(1, "qbuf: buffer is already queued or active.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 511 | goto done; |
| 512 | } |
| 513 | |
| 514 | if (b->flags & V4L2_BUF_FLAG_INPUT) { |
| 515 | if (b->input >= q->inputs) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 516 | dprintk(1, "qbuf: wrong input.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 517 | goto done; |
| 518 | } |
| 519 | buf->input = b->input; |
| 520 | } else { |
| 521 | buf->input = UNSET; |
| 522 | } |
| 523 | |
| 524 | switch (b->memory) { |
| 525 | case V4L2_MEMORY_MMAP: |
| 526 | if (0 == buf->baddr) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 527 | dprintk(1, "qbuf: mmap requested " |
| 528 | "but buffer addr is zero!\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 529 | goto done; |
| 530 | } |
| 531 | break; |
| 532 | case V4L2_MEMORY_USERPTR: |
| 533 | if (b->length < buf->bsize) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 534 | dprintk(1, "qbuf: buffer length is not enough\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 535 | goto done; |
| 536 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 537 | if (VIDEOBUF_NEEDS_INIT != buf->state && |
| 538 | buf->baddr != b->m.userptr) |
| 539 | q->ops->buf_release(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 540 | buf->baddr = b->m.userptr; |
| 541 | break; |
| 542 | case V4L2_MEMORY_OVERLAY: |
| 543 | buf->boff = b->m.offset; |
| 544 | break; |
| 545 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 546 | dprintk(1, "qbuf: wrong memory type\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 547 | goto done; |
| 548 | } |
| 549 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 550 | dprintk(1, "qbuf: requesting next field\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 551 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 552 | retval = q->ops->buf_prepare(q, buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 553 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 554 | dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 555 | goto done; |
| 556 | } |
| 557 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 558 | list_add_tail(&buf->stream, &q->stream); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 559 | if (q->streaming) { |
| 560 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 561 | spin_lock_irqsave(q->irqlock, flags); |
| 562 | q->ops->buf_queue(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 563 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 564 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 565 | } |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 566 | dprintk(1, "qbuf: succeded\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 567 | retval = 0; |
| 568 | |
| 569 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 570 | mutex_unlock(&q->vb_lock); |
Maxim Levitsky | 9900132 | 2007-09-27 20:34:09 -0300 | [diff] [blame] | 571 | |
| 572 | if (b->memory == V4L2_MEMORY_MMAP) |
| 573 | up_read(¤t->mm->mmap_sem); |
| 574 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 575 | return retval; |
| 576 | } |
| 577 | |
| 578 | int videobuf_dqbuf(struct videobuf_queue *q, |
| 579 | struct v4l2_buffer *b, int nonblocking) |
| 580 | { |
| 581 | struct videobuf_buffer *buf; |
| 582 | int retval; |
| 583 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 584 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 585 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 586 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 587 | retval = -EBUSY; |
| 588 | if (q->reading) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 589 | dprintk(1, "dqbuf: Reading running...\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 590 | goto done; |
| 591 | } |
| 592 | retval = -EINVAL; |
| 593 | if (b->type != q->type) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 594 | dprintk(1, "dqbuf: Wrong type.\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 595 | goto done; |
| 596 | } |
| 597 | if (list_empty(&q->stream)) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 598 | dprintk(1, "dqbuf: stream running\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 599 | goto done; |
| 600 | } |
| 601 | buf = list_entry(q->stream.next, struct videobuf_buffer, stream); |
Brandon Philips | e43d76b | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 602 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 603 | retval = videobuf_waiton(buf, nonblocking, 1); |
Brandon Philips | e43d76b | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 604 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 605 | if (retval < 0) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 606 | dprintk(1, "dqbuf: waiton returned %d\n", retval); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 607 | goto done; |
| 608 | } |
| 609 | switch (buf->state) { |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 610 | case VIDEOBUF_ERROR: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 611 | dprintk(1, "dqbuf: state is error\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 612 | retval = -EIO; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 613 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 614 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 615 | break; |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 616 | case VIDEOBUF_DONE: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 617 | dprintk(1, "dqbuf: state is done\n"); |
| 618 | CALL(q, sync, q, buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 619 | buf->state = VIDEOBUF_IDLE; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 620 | break; |
| 621 | default: |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 622 | dprintk(1, "dqbuf: state invalid\n"); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 623 | retval = -EINVAL; |
| 624 | goto done; |
| 625 | } |
| 626 | list_del(&buf->stream); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 627 | memset(b, 0, sizeof(*b)); |
| 628 | videobuf_status(q, b, buf, q->type); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 629 | |
| 630 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 631 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 632 | return retval; |
| 633 | } |
| 634 | |
| 635 | int videobuf_streamon(struct videobuf_queue *q) |
| 636 | { |
| 637 | struct videobuf_buffer *buf; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 638 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 639 | int retval; |
| 640 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 641 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 642 | retval = -EBUSY; |
| 643 | if (q->reading) |
| 644 | goto done; |
| 645 | retval = 0; |
| 646 | if (q->streaming) |
| 647 | goto done; |
| 648 | q->streaming = 1; |
| 649 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 650 | spin_lock_irqsave(q->irqlock, flags); |
Trent Piepho | a991f44 | 2007-10-10 05:37:43 -0300 | [diff] [blame] | 651 | list_for_each_entry(buf, &q->stream, stream) |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 652 | if (buf->state == VIDEOBUF_PREPARED) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 653 | q->ops->buf_queue(q, buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 654 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 655 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 656 | |
| 657 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 658 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 659 | return retval; |
| 660 | } |
| 661 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 662 | /* Locking: Caller holds q->vb_lock */ |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 663 | static int __videobuf_streamoff(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 664 | { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 665 | if (!q->streaming) |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 666 | return -EINVAL; |
| 667 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 668 | videobuf_queue_cancel(q); |
| 669 | q->streaming = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 670 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | int videobuf_streamoff(struct videobuf_queue *q) |
| 675 | { |
| 676 | int retval; |
| 677 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 678 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 679 | retval = __videobuf_streamoff(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 680 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 681 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 682 | return retval; |
| 683 | } |
| 684 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 685 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 686 | static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, |
| 687 | char __user *data, |
| 688 | size_t count, loff_t *ppos) |
| 689 | { |
| 690 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 691 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 692 | int retval; |
| 693 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 694 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 695 | |
| 696 | /* setup stuff */ |
| 697 | q->read_buf = videobuf_alloc(q); |
| 698 | if (NULL == q->read_buf) |
| 699 | return -ENOMEM; |
| 700 | |
| 701 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 702 | q->read_buf->baddr = (unsigned long)data; |
| 703 | q->read_buf->bsize = count; |
| 704 | |
| 705 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 706 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 707 | if (0 != retval) |
| 708 | goto done; |
| 709 | |
| 710 | /* start capture & wait */ |
| 711 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 712 | spin_lock_irqsave(q->irqlock, flags); |
| 713 | q->ops->buf_queue(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 714 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 715 | spin_unlock_irqrestore(q->irqlock, flags); |
| 716 | retval = videobuf_waiton(q->read_buf, 0, 0); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 717 | if (0 == retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 718 | CALL(q, sync, q, q->read_buf); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 719 | if (VIDEOBUF_ERROR == q->read_buf->state) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 720 | retval = -EIO; |
| 721 | else |
| 722 | retval = q->read_buf->size; |
| 723 | } |
| 724 | |
| 725 | done: |
| 726 | /* cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 727 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 728 | kfree(q->read_buf); |
| 729 | q->read_buf = NULL; |
| 730 | return retval; |
| 731 | } |
| 732 | |
| 733 | ssize_t videobuf_read_one(struct videobuf_queue *q, |
| 734 | char __user *data, size_t count, loff_t *ppos, |
| 735 | int nonblocking) |
| 736 | { |
| 737 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 738 | unsigned long flags = 0; |
Guennadi Liakhovetski | 7daa4a8 | 2008-04-22 14:46:03 -0300 | [diff] [blame] | 739 | unsigned size = 0, nbufs = 1; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 740 | int retval; |
| 741 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 742 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 743 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 744 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 745 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 746 | q->ops->buf_setup(q, &nbufs, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 747 | |
| 748 | if (NULL == q->read_buf && |
| 749 | count >= size && |
| 750 | !nonblocking) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 751 | retval = videobuf_read_zerocopy(q, data, count, ppos); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 752 | if (retval >= 0 || retval == -EIO) |
| 753 | /* ok, all done */ |
| 754 | goto done; |
| 755 | /* fallback to kernel bounce buffer on failures */ |
| 756 | } |
| 757 | |
| 758 | if (NULL == q->read_buf) { |
| 759 | /* need to capture a new frame */ |
| 760 | retval = -ENOMEM; |
| 761 | q->read_buf = videobuf_alloc(q); |
| 762 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 763 | dprintk(1, "video alloc=0x%p\n", q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 764 | if (NULL == q->read_buf) |
| 765 | goto done; |
| 766 | q->read_buf->memory = V4L2_MEMORY_USERPTR; |
| 767 | q->read_buf->bsize = count; /* preferred size */ |
| 768 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 769 | retval = q->ops->buf_prepare(q, q->read_buf, field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 770 | |
| 771 | if (0 != retval) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 772 | kfree(q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 773 | q->read_buf = NULL; |
| 774 | goto done; |
| 775 | } |
| 776 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 777 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 778 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 779 | q->ops->buf_queue(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 780 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 781 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 782 | q->read_off = 0; |
| 783 | } |
| 784 | |
| 785 | /* wait until capture is done */ |
| 786 | retval = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 787 | if (0 != retval) |
| 788 | goto done; |
| 789 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 790 | CALL(q, sync, q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 791 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 792 | if (VIDEOBUF_ERROR == q->read_buf->state) { |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 793 | /* catch I/O errors */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 794 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 795 | kfree(q->read_buf); |
| 796 | q->read_buf = NULL; |
| 797 | retval = -EIO; |
| 798 | goto done; |
| 799 | } |
| 800 | |
| 801 | /* Copy to userspace */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 802 | retval = CALL(q, video_copy_to_user, q, data, count, nonblocking); |
| 803 | if (retval < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 804 | goto done; |
| 805 | |
| 806 | q->read_off += retval; |
| 807 | if (q->read_off == q->read_buf->size) { |
| 808 | /* all data copied, cleanup */ |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 809 | q->ops->buf_release(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 810 | kfree(q->read_buf); |
| 811 | q->read_buf = NULL; |
| 812 | } |
| 813 | |
| 814 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 815 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 816 | return retval; |
| 817 | } |
| 818 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 819 | /* Locking: Caller holds q->vb_lock */ |
Mauro Carvalho Chehab | 225ba90 | 2007-12-12 21:46:26 -0300 | [diff] [blame] | 820 | static int __videobuf_read_start(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 821 | { |
| 822 | enum v4l2_field field; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 823 | unsigned long flags = 0; |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 824 | unsigned int count = 0, size = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 825 | int err, i; |
| 826 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 827 | q->ops->buf_setup(q, &count, &size); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 828 | if (count < 2) |
| 829 | count = 2; |
| 830 | if (count > VIDEO_MAX_FRAME) |
| 831 | count = VIDEO_MAX_FRAME; |
| 832 | size = PAGE_ALIGN(size); |
| 833 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 834 | err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 835 | if (err < 0) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 836 | return err; |
| 837 | |
Brandon Philips | 49ee718 | 2007-10-05 16:26:27 -0300 | [diff] [blame] | 838 | count = err; |
| 839 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 840 | for (i = 0; i < count; i++) { |
| 841 | field = videobuf_next_field(q); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 842 | err = q->ops->buf_prepare(q, q->bufs[i], field); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 843 | if (err) |
| 844 | return err; |
| 845 | list_add_tail(&q->bufs[i]->stream, &q->stream); |
| 846 | } |
| 847 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 848 | spin_lock_irqsave(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 849 | for (i = 0; i < count; i++) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 850 | q->ops->buf_queue(q, q->bufs[i]); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 851 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 852 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 853 | q->reading = 1; |
| 854 | return 0; |
| 855 | } |
| 856 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 857 | static void __videobuf_read_stop(struct videobuf_queue *q) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 858 | { |
| 859 | int i; |
| 860 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 861 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 862 | videobuf_queue_cancel(q); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 863 | __videobuf_mmap_free(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 864 | INIT_LIST_HEAD(&q->stream); |
| 865 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 866 | if (NULL == q->bufs[i]) |
| 867 | continue; |
| 868 | kfree(q->bufs[i]); |
| 869 | q->bufs[i] = NULL; |
| 870 | } |
| 871 | q->read_buf = NULL; |
| 872 | q->reading = 0; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 873 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 874 | } |
| 875 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 876 | int videobuf_read_start(struct videobuf_queue *q) |
| 877 | { |
| 878 | int rc; |
| 879 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 880 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 881 | rc = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 882 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 883 | |
| 884 | return rc; |
| 885 | } |
| 886 | |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 887 | void videobuf_read_stop(struct videobuf_queue *q) |
| 888 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 889 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 890 | __videobuf_read_stop(q); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 891 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 892 | } |
| 893 | |
| 894 | void videobuf_stop(struct videobuf_queue *q) |
| 895 | { |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 896 | mutex_lock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 897 | |
| 898 | if (q->streaming) |
| 899 | __videobuf_streamoff(q); |
| 900 | |
| 901 | if (q->reading) |
| 902 | __videobuf_read_stop(q); |
| 903 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 904 | mutex_unlock(&q->vb_lock); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 905 | } |
| 906 | |
| 907 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 908 | ssize_t videobuf_read_stream(struct videobuf_queue *q, |
| 909 | char __user *data, size_t count, loff_t *ppos, |
| 910 | int vbihack, int nonblocking) |
| 911 | { |
| 912 | int rc, retval; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 913 | unsigned long flags = 0; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 914 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 915 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 916 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 917 | dprintk(2, "%s\n", __FUNCTION__); |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 918 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 919 | retval = -EBUSY; |
| 920 | if (q->streaming) |
| 921 | goto done; |
| 922 | if (!q->reading) { |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 923 | retval = __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 924 | if (retval < 0) |
| 925 | goto done; |
| 926 | } |
| 927 | |
| 928 | retval = 0; |
| 929 | while (count > 0) { |
| 930 | /* get / wait for data */ |
| 931 | if (NULL == q->read_buf) { |
| 932 | q->read_buf = list_entry(q->stream.next, |
| 933 | struct videobuf_buffer, |
| 934 | stream); |
| 935 | list_del(&q->read_buf->stream); |
| 936 | q->read_off = 0; |
| 937 | } |
| 938 | rc = videobuf_waiton(q->read_buf, nonblocking, 1); |
| 939 | if (rc < 0) { |
| 940 | if (0 == retval) |
| 941 | retval = rc; |
| 942 | break; |
| 943 | } |
| 944 | |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 945 | if (q->read_buf->state == VIDEOBUF_DONE) { |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 946 | rc = CALL(q, copy_stream, q, data + retval, count, |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 947 | retval, vbihack, nonblocking); |
| 948 | if (rc < 0) { |
| 949 | retval = rc; |
| 950 | break; |
| 951 | } |
| 952 | retval += rc; |
| 953 | count -= rc; |
| 954 | q->read_off += rc; |
| 955 | } else { |
| 956 | /* some error */ |
| 957 | q->read_off = q->read_buf->size; |
| 958 | if (0 == retval) |
| 959 | retval = -EIO; |
| 960 | } |
| 961 | |
| 962 | /* requeue buffer when done with copying */ |
| 963 | if (q->read_off == q->read_buf->size) { |
| 964 | list_add_tail(&q->read_buf->stream, |
| 965 | &q->stream); |
| 966 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 967 | spin_lock_irqsave(q->irqlock, flags); |
| 968 | q->ops->buf_queue(q, q->read_buf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 969 | if (q->irqlock) |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 970 | spin_unlock_irqrestore(q->irqlock, flags); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 971 | q->read_buf = NULL; |
| 972 | } |
| 973 | if (retval < 0) |
| 974 | break; |
| 975 | } |
| 976 | |
| 977 | done: |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 978 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 979 | return retval; |
| 980 | } |
| 981 | |
| 982 | unsigned int videobuf_poll_stream(struct file *file, |
| 983 | struct videobuf_queue *q, |
| 984 | poll_table *wait) |
| 985 | { |
| 986 | struct videobuf_buffer *buf = NULL; |
| 987 | unsigned int rc = 0; |
| 988 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 989 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 990 | if (q->streaming) { |
| 991 | if (!list_empty(&q->stream)) |
| 992 | buf = list_entry(q->stream.next, |
| 993 | struct videobuf_buffer, stream); |
| 994 | } else { |
| 995 | if (!q->reading) |
Adrian Bunk | 3f84307 | 2007-12-12 16:44:54 -0300 | [diff] [blame] | 996 | __videobuf_read_start(q); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 997 | if (!q->reading) { |
| 998 | rc = POLLERR; |
| 999 | } else if (NULL == q->read_buf) { |
| 1000 | q->read_buf = list_entry(q->stream.next, |
| 1001 | struct videobuf_buffer, |
| 1002 | stream); |
| 1003 | list_del(&q->read_buf->stream); |
| 1004 | q->read_off = 0; |
| 1005 | } |
| 1006 | buf = q->read_buf; |
| 1007 | } |
| 1008 | if (!buf) |
| 1009 | rc = POLLERR; |
| 1010 | |
| 1011 | if (0 == rc) { |
| 1012 | poll_wait(file, &buf->done, wait); |
Brandon Philips | 0fc0686 | 2007-11-06 20:02:36 -0300 | [diff] [blame] | 1013 | if (buf->state == VIDEOBUF_DONE || |
| 1014 | buf->state == VIDEOBUF_ERROR) |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1015 | rc = POLLIN|POLLRDNORM; |
| 1016 | } |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1017 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1018 | return rc; |
| 1019 | } |
| 1020 | |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1021 | int videobuf_mmap_mapper(struct videobuf_queue *q, |
| 1022 | struct vm_area_struct *vma) |
| 1023 | { |
| 1024 | int retval; |
| 1025 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1026 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1027 | |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1028 | mutex_lock(&q->vb_lock); |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1029 | retval = CALL(q, mmap_mapper, q, vma); |
Mauro Carvalho Chehab | d05051c | 2008-01-10 07:33:03 -0300 | [diff] [blame] | 1030 | q->is_mmapped = 1; |
Mauro Carvalho Chehab | 64f9477 | 2008-01-31 13:57:53 -0300 | [diff] [blame] | 1031 | mutex_unlock(&q->vb_lock); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1032 | |
| 1033 | return retval; |
| 1034 | } |
| 1035 | |
| 1036 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
| 1037 | int videobuf_cgmbuf(struct videobuf_queue *q, |
| 1038 | struct video_mbuf *mbuf, int count) |
| 1039 | { |
| 1040 | struct v4l2_requestbuffers req; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1041 | int rc, i; |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1042 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1043 | MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1044 | |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1045 | memset(&req, 0, sizeof(req)); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1046 | req.type = q->type; |
| 1047 | req.count = count; |
| 1048 | req.memory = V4L2_MEMORY_MMAP; |
Mauro Carvalho Chehab | e2c7731 | 2007-12-10 10:53:20 -0300 | [diff] [blame] | 1049 | rc = videobuf_reqbufs(q, &req); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1050 | if (rc < 0) |
| 1051 | return rc; |
| 1052 | |
| 1053 | mbuf->frames = req.count; |
| 1054 | mbuf->size = 0; |
| 1055 | for (i = 0; i < mbuf->frames; i++) { |
| 1056 | mbuf->offsets[i] = q->bufs[i]->boff; |
| 1057 | mbuf->size += q->bufs[i]->bsize; |
| 1058 | } |
| 1059 | |
| 1060 | return 0; |
| 1061 | } |
Pekka Enberg | a13625c | 2007-10-13 05:54:54 -0300 | [diff] [blame] | 1062 | EXPORT_SYMBOL_GPL(videobuf_cgmbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1063 | #endif |
| 1064 | |
| 1065 | /* --------------------------------------------------------------------- */ |
| 1066 | |
| 1067 | EXPORT_SYMBOL_GPL(videobuf_waiton); |
| 1068 | EXPORT_SYMBOL_GPL(videobuf_iolock); |
| 1069 | |
| 1070 | EXPORT_SYMBOL_GPL(videobuf_alloc); |
| 1071 | |
Mauro Carvalho Chehab | d4cae5a | 2007-10-08 12:20:02 -0300 | [diff] [blame] | 1072 | EXPORT_SYMBOL_GPL(videobuf_queue_core_init); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1073 | EXPORT_SYMBOL_GPL(videobuf_queue_cancel); |
| 1074 | EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); |
| 1075 | |
| 1076 | EXPORT_SYMBOL_GPL(videobuf_next_field); |
| 1077 | EXPORT_SYMBOL_GPL(videobuf_reqbufs); |
| 1078 | EXPORT_SYMBOL_GPL(videobuf_querybuf); |
| 1079 | EXPORT_SYMBOL_GPL(videobuf_qbuf); |
| 1080 | EXPORT_SYMBOL_GPL(videobuf_dqbuf); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1081 | EXPORT_SYMBOL_GPL(videobuf_streamon); |
| 1082 | EXPORT_SYMBOL_GPL(videobuf_streamoff); |
| 1083 | |
Mauro Carvalho Chehab | 19fb145 | 2007-11-15 23:09:30 -0300 | [diff] [blame] | 1084 | EXPORT_SYMBOL_GPL(videobuf_read_start); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1085 | EXPORT_SYMBOL_GPL(videobuf_read_stop); |
Brandon Philips | 19bc513 | 2007-11-13 20:05:38 -0300 | [diff] [blame] | 1086 | EXPORT_SYMBOL_GPL(videobuf_stop); |
Mauro Carvalho Chehab | 7a7d9a8 | 2007-08-23 16:26:14 -0300 | [diff] [blame] | 1087 | EXPORT_SYMBOL_GPL(videobuf_read_stream); |
| 1088 | EXPORT_SYMBOL_GPL(videobuf_read_one); |
| 1089 | EXPORT_SYMBOL_GPL(videobuf_poll_stream); |
| 1090 | |
| 1091 | EXPORT_SYMBOL_GPL(videobuf_mmap_setup); |
| 1092 | EXPORT_SYMBOL_GPL(videobuf_mmap_free); |
| 1093 | EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); |