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Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-core.c')
-rw-r--r--drivers/media/v4l2-core/videobuf2-core.c730
1 files changed, 506 insertions, 224 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index f9059bb73840..7c4489c42365 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -6,6 +6,9 @@
* Author: Pawel Osciak <pawel@osciak.com>
* Marek Szyprowski <m.szyprowski@samsung.com>
*
+ * The vb2_thread implementation was based on code from videobuf-dvb.c:
+ * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
@@ -18,76 +21,154 @@
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/sched.h>
+#include <linux/freezer.h>
+#include <linux/kthread.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
+#include <media/v4l2-common.h>
#include <media/videobuf2-core.h>
static int debug;
module_param(debug, int, 0644);
-#define dprintk(level, fmt, arg...) \
- do { \
- if (debug >= level) \
- printk(KERN_DEBUG "vb2: " fmt, ## arg); \
+#define dprintk(level, fmt, arg...) \
+ do { \
+ if (debug >= level) \
+ pr_debug("vb2: %s: " fmt, __func__, ## arg); \
} while (0)
#ifdef CONFIG_VIDEO_ADV_DEBUG
/*
- * If advanced debugging is on, then count how often each op is called,
- * which can either be per-buffer or per-queue.
+ * If advanced debugging is on, then count how often each op is called
+ * successfully, which can either be per-buffer or per-queue.
*
- * If the op failed then the 'fail_' variant is called to decrease the
- * counter. That makes it easy to check that the 'init' and 'cleanup'
+ * This makes it easy to check that the 'init' and 'cleanup'
* (and variations thereof) stay balanced.
*/
+#define log_memop(vb, op) \
+ dprintk(2, "call_memop(%p, %d, %s)%s\n", \
+ (vb)->vb2_queue, (vb)->v4l2_buf.index, #op, \
+ (vb)->vb2_queue->mem_ops->op ? "" : " (nop)")
+
#define call_memop(vb, op, args...) \
({ \
struct vb2_queue *_q = (vb)->vb2_queue; \
- dprintk(2, "call_memop(%p, %d, %s)%s\n", \
- _q, (vb)->v4l2_buf.index, #op, \
- _q->mem_ops->op ? "" : " (nop)"); \
+ int err; \
+ \
+ log_memop(vb, op); \
+ err = _q->mem_ops->op ? _q->mem_ops->op(args) : 0; \
+ if (!err) \
+ (vb)->cnt_mem_ ## op++; \
+ err; \
+})
+
+#define call_ptr_memop(vb, op, args...) \
+({ \
+ struct vb2_queue *_q = (vb)->vb2_queue; \
+ void *ptr; \
+ \
+ log_memop(vb, op); \
+ ptr = _q->mem_ops->op ? _q->mem_ops->op(args) : NULL; \
+ if (!IS_ERR_OR_NULL(ptr)) \
+ (vb)->cnt_mem_ ## op++; \
+ ptr; \
+})
+
+#define call_void_memop(vb, op, args...) \
+({ \
+ struct vb2_queue *_q = (vb)->vb2_queue; \
+ \
+ log_memop(vb, op); \
+ if (_q->mem_ops->op) \
+ _q->mem_ops->op(args); \
(vb)->cnt_mem_ ## op++; \
- _q->mem_ops->op ? _q->mem_ops->op(args) : 0; \
})
-#define fail_memop(vb, op) ((vb)->cnt_mem_ ## op--)
+
+#define log_qop(q, op) \
+ dprintk(2, "call_qop(%p, %s)%s\n", q, #op, \
+ (q)->ops->op ? "" : " (nop)")
#define call_qop(q, op, args...) \
({ \
- dprintk(2, "call_qop(%p, %s)%s\n", q, #op, \
- (q)->ops->op ? "" : " (nop)"); \
+ int err; \
+ \
+ log_qop(q, op); \
+ err = (q)->ops->op ? (q)->ops->op(args) : 0; \
+ if (!err) \
+ (q)->cnt_ ## op++; \
+ err; \
+})
+
+#define call_void_qop(q, op, args...) \
+({ \
+ log_qop(q, op); \
+ if ((q)->ops->op) \
+ (q)->ops->op(args); \
(q)->cnt_ ## op++; \
- (q)->ops->op ? (q)->ops->op(args) : 0; \
})
-#define fail_qop(q, op) ((q)->cnt_ ## op--)
+
+#define log_vb_qop(vb, op, args...) \
+ dprintk(2, "call_vb_qop(%p, %d, %s)%s\n", \
+ (vb)->vb2_queue, (vb)->v4l2_buf.index, #op, \
+ (vb)->vb2_queue->ops->op ? "" : " (nop)")
#define call_vb_qop(vb, op, args...) \
({ \
- struct vb2_queue *_q = (vb)->vb2_queue; \
- dprintk(2, "call_vb_qop(%p, %d, %s)%s\n", \
- _q, (vb)->v4l2_buf.index, #op, \
- _q->ops->op ? "" : " (nop)"); \
+ int err; \
+ \
+ log_vb_qop(vb, op); \
+ err = (vb)->vb2_queue->ops->op ? \
+ (vb)->vb2_queue->ops->op(args) : 0; \
+ if (!err) \
+ (vb)->cnt_ ## op++; \
+ err; \
+})
+
+#define call_void_vb_qop(vb, op, args...) \
+({ \
+ log_vb_qop(vb, op); \
+ if ((vb)->vb2_queue->ops->op) \
+ (vb)->vb2_queue->ops->op(args); \
(vb)->cnt_ ## op++; \
- _q->ops->op ? _q->ops->op(args) : 0; \
})
-#define fail_vb_qop(vb, op) ((vb)->cnt_ ## op--)
#else
#define call_memop(vb, op, args...) \
- ((vb)->vb2_queue->mem_ops->op ? (vb)->vb2_queue->mem_ops->op(args) : 0)
-#define fail_memop(vb, op)
+ ((vb)->vb2_queue->mem_ops->op ? \
+ (vb)->vb2_queue->mem_ops->op(args) : 0)
+
+#define call_ptr_memop(vb, op, args...) \
+ ((vb)->vb2_queue->mem_ops->op ? \
+ (vb)->vb2_queue->mem_ops->op(args) : NULL)
+
+#define call_void_memop(vb, op, args...) \
+ do { \
+ if ((vb)->vb2_queue->mem_ops->op) \
+ (vb)->vb2_queue->mem_ops->op(args); \
+ } while (0)
#define call_qop(q, op, args...) \
((q)->ops->op ? (q)->ops->op(args) : 0)
-#define fail_qop(q, op)
+
+#define call_void_qop(q, op, args...) \
+ do { \
+ if ((q)->ops->op) \
+ (q)->ops->op(args); \
+ } while (0)
#define call_vb_qop(vb, op, args...) \
((vb)->vb2_queue->ops->op ? (vb)->vb2_queue->ops->op(args) : 0)
-#define fail_vb_qop(vb, op)
+
+#define call_void_vb_qop(vb, op, args...) \
+ do { \
+ if ((vb)->vb2_queue->ops->op) \
+ (vb)->vb2_queue->ops->op(args); \
+ } while (0)
#endif
@@ -118,7 +199,7 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
for (plane = 0; plane < vb->num_planes; ++plane) {
unsigned long size = PAGE_ALIGN(q->plane_sizes[plane]);
- mem_priv = call_memop(vb, alloc, q->alloc_ctx[plane],
+ mem_priv = call_ptr_memop(vb, alloc, q->alloc_ctx[plane],
size, q->gfp_flags);
if (IS_ERR_OR_NULL(mem_priv))
goto free;
@@ -130,10 +211,9 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
return 0;
free:
- fail_memop(vb, alloc);
/* Free already allocated memory if one of the allocations failed */
for (; plane > 0; --plane) {
- call_memop(vb, put, vb->planes[plane - 1].mem_priv);
+ call_void_memop(vb, put, vb->planes[plane - 1].mem_priv);
vb->planes[plane - 1].mem_priv = NULL;
}
@@ -148,9 +228,9 @@ static void __vb2_buf_mem_free(struct vb2_buffer *vb)
unsigned int plane;
for (plane = 0; plane < vb->num_planes; ++plane) {
- call_memop(vb, put, vb->planes[plane].mem_priv);
+ call_void_memop(vb, put, vb->planes[plane].mem_priv);
vb->planes[plane].mem_priv = NULL;
- dprintk(3, "Freed plane %d of buffer %d\n", plane,
+ dprintk(3, "freed plane %d of buffer %d\n", plane,
vb->v4l2_buf.index);
}
}
@@ -165,7 +245,7 @@ static void __vb2_buf_userptr_put(struct vb2_buffer *vb)
for (plane = 0; plane < vb->num_planes; ++plane) {
if (vb->planes[plane].mem_priv)
- call_memop(vb, put_userptr, vb->planes[plane].mem_priv);
+ call_void_memop(vb, put_userptr, vb->planes[plane].mem_priv);
vb->planes[plane].mem_priv = NULL;
}
}
@@ -180,9 +260,9 @@ static void __vb2_plane_dmabuf_put(struct vb2_buffer *vb, struct vb2_plane *p)
return;
if (p->dbuf_mapped)
- call_memop(vb, unmap_dmabuf, p->mem_priv);
+ call_void_memop(vb, unmap_dmabuf, p->mem_priv);
- call_memop(vb, detach_dmabuf, p->mem_priv);
+ call_void_memop(vb, detach_dmabuf, p->mem_priv);
dma_buf_put(p->dbuf);
memset(p, 0, sizeof(*p));
}
@@ -245,7 +325,7 @@ static void __setup_offsets(struct vb2_queue *q, unsigned int n)
for (plane = 0; plane < vb->num_planes; ++plane) {
vb->v4l2_planes[plane].m.mem_offset = off;
- dprintk(3, "Buffer %d, plane %d offset 0x%08lx\n",
+ dprintk(3, "buffer %d, plane %d offset 0x%08lx\n",
buffer, plane, off);
off += vb->v4l2_planes[plane].length;
@@ -272,7 +352,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
/* Allocate videobuf buffer structures */
vb = kzalloc(q->buf_struct_size, GFP_KERNEL);
if (!vb) {
- dprintk(1, "Memory alloc for buffer struct failed\n");
+ dprintk(1, "memory alloc for buffer struct failed\n");
break;
}
@@ -291,7 +371,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
if (memory == V4L2_MEMORY_MMAP) {
ret = __vb2_buf_mem_alloc(vb);
if (ret) {
- dprintk(1, "Failed allocating memory for "
+ dprintk(1, "failed allocating memory for "
"buffer %d\n", buffer);
kfree(vb);
break;
@@ -303,9 +383,8 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
*/
ret = call_vb_qop(vb, buf_init, vb);
if (ret) {
- dprintk(1, "Buffer %d %p initialization"
+ dprintk(1, "buffer %d %p initialization"
" failed\n", buffer, vb);
- fail_vb_qop(vb, buf_init);
__vb2_buf_mem_free(vb);
kfree(vb);
break;
@@ -319,7 +398,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
if (memory == V4L2_MEMORY_MMAP)
__setup_offsets(q, buffer);
- dprintk(1, "Allocated %d buffers, %d plane(s) each\n",
+ dprintk(1, "allocated %d buffers, %d plane(s) each\n",
buffer, num_planes);
return buffer;
@@ -371,7 +450,7 @@ static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
if (q->bufs[buffer] == NULL)
continue;
if (q->bufs[buffer]->state == VB2_BUF_STATE_PREPARING) {
- dprintk(1, "reqbufs: preparing buffers, cannot free\n");
+ dprintk(1, "preparing buffers, cannot free\n");
return -EAGAIN;
}
}
@@ -382,7 +461,7 @@ static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
struct vb2_buffer *vb = q->bufs[buffer];
if (vb && vb->planes[0].mem_priv)
- call_vb_qop(vb, buf_cleanup, vb);
+ call_void_vb_qop(vb, buf_cleanup, vb);
}
/* Release video buffer memory */
@@ -476,13 +555,13 @@ static int __verify_planes_array(struct vb2_buffer *vb, const struct v4l2_buffer
/* Is memory for copying plane information present? */
if (NULL == b->m.planes) {
- dprintk(1, "Multi-planar buffer passed but "
+ dprintk(1, "multi-planar buffer passed but "
"planes array not provided\n");
return -EINVAL;
}
if (b->length < vb->num_planes || b->length > VIDEO_MAX_PLANES) {
- dprintk(1, "Incorrect planes array length, "
+ dprintk(1, "incorrect planes array length, "
"expected %d, got %d\n", vb->num_planes, b->length);
return -EINVAL;
}
@@ -656,12 +735,12 @@ int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b)
int ret;
if (b->type != q->type) {
- dprintk(1, "querybuf: wrong buffer type\n");
+ dprintk(1, "wrong buffer type\n");
return -EINVAL;
}
if (b->index >= q->num_buffers) {
- dprintk(1, "querybuf: buffer index out of range\n");
+ dprintk(1, "buffer index out of range\n");
return -EINVAL;
}
vb = q->bufs[b->index];
@@ -721,12 +800,12 @@ static int __verify_memory_type(struct vb2_queue *q,
{
if (memory != V4L2_MEMORY_MMAP && memory != V4L2_MEMORY_USERPTR &&
memory != V4L2_MEMORY_DMABUF) {
- dprintk(1, "reqbufs: unsupported memory type\n");
+ dprintk(1, "unsupported memory type\n");
return -EINVAL;
}
if (type != q->type) {
- dprintk(1, "reqbufs: requested type is incorrect\n");
+ dprintk(1, "requested type is incorrect\n");
return -EINVAL;
}
@@ -735,17 +814,17 @@ static int __verify_memory_type(struct vb2_queue *q,
* are available.
*/
if (memory == V4L2_MEMORY_MMAP && __verify_mmap_ops(q)) {
- dprintk(1, "reqbufs: MMAP for current setup unsupported\n");
+ dprintk(1, "MMAP for current setup unsupported\n");
return -EINVAL;
}
if (memory == V4L2_MEMORY_USERPTR && __verify_userptr_ops(q)) {
- dprintk(1, "reqbufs: USERPTR for current setup unsupported\n");
+ dprintk(1, "USERPTR for current setup unsupported\n");
return -EINVAL;
}
if (memory == V4L2_MEMORY_DMABUF && __verify_dmabuf_ops(q)) {
- dprintk(1, "reqbufs: DMABUF for current setup unsupported\n");
+ dprintk(1, "DMABUF for current setup unsupported\n");
return -EINVAL;
}
@@ -754,8 +833,8 @@ static int __verify_memory_type(struct vb2_queue *q,
* create_bufs is called with count == 0, but count == 0 should still
* do the memory and type validation.
*/
- if (q->fileio) {
- dprintk(1, "reqbufs: file io in progress\n");
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "file io in progress\n");
return -EBUSY;
}
return 0;
@@ -790,7 +869,7 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
int ret;
if (q->streaming) {
- dprintk(1, "reqbufs: streaming active\n");
+ dprintk(1, "streaming active\n");
return -EBUSY;
}
@@ -800,7 +879,7 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
* are not in use and can be freed.
*/
if (q->memory == V4L2_MEMORY_MMAP && __buffers_in_use(q)) {
- dprintk(1, "reqbufs: memory in use, cannot free\n");
+ dprintk(1, "memory in use, cannot free\n");
return -EBUSY;
}
@@ -826,7 +905,7 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
* Make sure the requested values and current defaults are sane.
*/
num_buffers = min_t(unsigned int, req->count, VIDEO_MAX_FRAME);
- num_buffers = max_t(unsigned int, req->count, q->min_buffers_needed);
+ num_buffers = max_t(unsigned int, num_buffers, q->min_buffers_needed);
memset(q->plane_sizes, 0, sizeof(q->plane_sizes));
memset(q->alloc_ctx, 0, sizeof(q->alloc_ctx));
q->memory = req->memory;
@@ -837,15 +916,13 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
*/
ret = call_qop(q, queue_setup, q, NULL, &num_buffers, &num_planes,
q->plane_sizes, q->alloc_ctx);
- if (ret) {
- fail_qop(q, queue_setup);
+ if (ret)
return ret;
- }
/* Finally, allocate buffers and video memory */
allocated_buffers = __vb2_queue_alloc(q, req->memory, num_buffers, num_planes);
if (allocated_buffers == 0) {
- dprintk(1, "Memory allocation failed\n");
+ dprintk(1, "memory allocation failed\n");
return -ENOMEM;
}
@@ -864,8 +941,6 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
ret = call_qop(q, queue_setup, q, NULL, &num_buffers,
&num_planes, q->plane_sizes, q->alloc_ctx);
- if (ret)
- fail_qop(q, queue_setup);
if (!ret && allocated_buffers < num_buffers)
ret = -ENOMEM;
@@ -931,8 +1006,7 @@ static int __create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create
int ret;
if (q->num_buffers == VIDEO_MAX_FRAME) {
- dprintk(1, "%s(): maximum number of buffers already allocated\n",
- __func__);
+ dprintk(1, "maximum number of buffers already allocated\n");
return -ENOBUFS;
}
@@ -950,16 +1024,14 @@ static int __create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create
*/
ret = call_qop(q, queue_setup, q, &create->format, &num_buffers,
&num_planes, q->plane_sizes, q->alloc_ctx);
- if (ret) {
- fail_qop(q, queue_setup);
+ if (ret)
return ret;
- }
/* Finally, allocate buffers and video memory */
allocated_buffers = __vb2_queue_alloc(q, create->memory, num_buffers,
num_planes);
if (allocated_buffers == 0) {
- dprintk(1, "Memory allocation failed\n");
+ dprintk(1, "memory allocation failed\n");
return -ENOMEM;
}
@@ -975,8 +1047,6 @@ static int __create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create
*/
ret = call_qop(q, queue_setup, q, &create->format, &num_buffers,
&num_planes, q->plane_sizes, q->alloc_ctx);
- if (ret)
- fail_qop(q, queue_setup);
if (!ret && allocated_buffers < num_buffers)
ret = -ENOMEM;
@@ -1038,7 +1108,7 @@ void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no)
if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)
return NULL;
- return call_memop(vb, vaddr, vb->planes[plane_no].mem_priv);
+ return call_ptr_memop(vb, vaddr, vb->planes[plane_no].mem_priv);
}
EXPORT_SYMBOL_GPL(vb2_plane_vaddr);
@@ -1059,7 +1129,7 @@ void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no)
if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)
return NULL;
- return call_memop(vb, cookie, vb->planes[plane_no].mem_priv);
+ return call_ptr_memop(vb, cookie, vb->planes[plane_no].mem_priv);
}
EXPORT_SYMBOL_GPL(vb2_plane_cookie);
@@ -1094,9 +1164,8 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
if (!q->start_streaming_called) {
if (WARN_ON(state != VB2_BUF_STATE_QUEUED))
state = VB2_BUF_STATE_QUEUED;
- } else if (!WARN_ON(!q->start_streaming_called)) {
- if (WARN_ON(state != VB2_BUF_STATE_DONE &&
- state != VB2_BUF_STATE_ERROR))
+ } else if (WARN_ON(state != VB2_BUF_STATE_DONE &&
+ state != VB2_BUF_STATE_ERROR)) {
state = VB2_BUF_STATE_ERROR;
}
@@ -1107,12 +1176,12 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
*/
vb->cnt_buf_done++;
#endif
- dprintk(4, "Done processing on buffer %d, state: %d\n",
+ dprintk(4, "done processing on buffer %d, state: %d\n",
vb->v4l2_buf.index, state);
/* sync buffers */
for (plane = 0; plane < vb->num_planes; ++plane)
- call_memop(vb, finish, vb->planes[plane].mem_priv);
+ call_void_memop(vb, finish, vb->planes[plane].mem_priv);
/* Add the buffer to the done buffers list */
spin_lock_irqsave(&q->done_lock, flags);
@@ -1131,6 +1200,30 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
EXPORT_SYMBOL_GPL(vb2_buffer_done);
/**
+ * vb2_discard_done() - discard all buffers marked as DONE
+ * @q: videobuf2 queue
+ *
+ * This function is intended to be used with suspend/resume operations. It
+ * discards all 'done' buffers as they would be too old to be requested after
+ * resume.
+ *
+ * Drivers must stop the hardware and synchronize with interrupt handlers and/or
+ * delayed works before calling this function to make sure no buffer will be
+ * touched by the driver and/or hardware.
+ */
+void vb2_discard_done(struct vb2_queue *q)
+{
+ struct vb2_buffer *vb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&q->done_lock, flags);
+ list_for_each_entry(vb, &q->done_list, done_entry)
+ vb->state = VB2_BUF_STATE_ERROR;
+ spin_unlock_irqrestore(&q->done_lock, flags);
+}
+EXPORT_SYMBOL_GPL(vb2_discard_done);
+
+/**
* __fill_vb2_buffer() - fill a vb2_buffer with information provided in a
* v4l2_buffer by the userspace. The caller has already verified that struct
* v4l2_buffer has a valid number of planes.
@@ -1143,15 +1236,30 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) {
/* Fill in driver-provided information for OUTPUT types */
if (V4L2_TYPE_IS_OUTPUT(b->type)) {
+ bool bytesused_is_used;
+
+ /* Check if bytesused == 0 for all planes */
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ if (b->m.planes[plane].bytesused)
+ break;
+ bytesused_is_used = plane < vb->num_planes;
+
/*
* Will have to go up to b->length when API starts
* accepting variable number of planes.
+ *
+ * If bytesused_is_used is false, then fall back to the
+ * full buffer size. In that case userspace clearly
+ * never bothered to set it and it's a safe assumption
+ * that they really meant to use the full plane sizes.
*/
for (plane = 0; plane < vb->num_planes; ++plane) {
- v4l2_planes[plane].bytesused =
- b->m.planes[plane].bytesused;
- v4l2_planes[plane].data_offset =
- b->m.planes[plane].data_offset;
+ struct v4l2_plane *pdst = &v4l2_planes[plane];
+ struct v4l2_plane *psrc = &b->m.planes[plane];
+
+ pdst->bytesused = bytesused_is_used ?
+ psrc->bytesused : psrc->length;
+ pdst->data_offset = psrc->data_offset;
}
}
@@ -1169,8 +1277,6 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
b->m.planes[plane].m.fd;
v4l2_planes[plane].length =
b->m.planes[plane].length;
- v4l2_planes[plane].data_offset =
- b->m.planes[plane].data_offset;
}
}
} else {
@@ -1179,11 +1285,15 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
* so fill in relevant v4l2_buffer struct fields instead.
* In videobuf we use our internal V4l2_planes struct for
* single-planar buffers as well, for simplicity.
+ *
+ * If bytesused == 0, then fall back to the full buffer size
+ * as that's a sensible default.
*/
- if (V4L2_TYPE_IS_OUTPUT(b->type)) {
- v4l2_planes[0].bytesused = b->bytesused;
- v4l2_planes[0].data_offset = 0;
- }
+ if (V4L2_TYPE_IS_OUTPUT(b->type))
+ v4l2_planes[0].bytesused =
+ b->bytesused ? b->bytesused : b->length;
+ else
+ v4l2_planes[0].bytesused = 0;
if (b->memory == V4L2_MEMORY_USERPTR) {
v4l2_planes[0].m.userptr = b->m.userptr;
@@ -1193,9 +1303,7 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
if (b->memory == V4L2_MEMORY_DMABUF) {
v4l2_planes[0].m.fd = b->m.fd;
v4l2_planes[0].length = b->length;
- v4l2_planes[0].data_offset = 0;
}
-
}
/* Zero flags that the vb2 core handles */
@@ -1226,6 +1334,15 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
}
/**
+ * __qbuf_mmap() - handle qbuf of an MMAP buffer
+ */
+static int __qbuf_mmap(struct vb2_buffer *vb, const struct v4l2_buffer *b)
+{
+ __fill_vb2_buffer(vb, b, vb->v4l2_planes);
+ return call_vb_qop(vb, buf_prepare, vb);
+}
+
+/**
* __qbuf_userptr() - handle qbuf of a USERPTR buffer
*/
static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
@@ -1238,6 +1355,7 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
int write = !V4L2_TYPE_IS_OUTPUT(q->type);
bool reacquired = vb->planes[0].mem_priv == NULL;
+ memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
__fill_vb2_buffer(vb, b, planes);
@@ -1248,12 +1366,12 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
&& vb->v4l2_planes[plane].length == planes[plane].length)
continue;
- dprintk(3, "qbuf: userspace address for plane %d changed, "
+ dprintk(3, "userspace address for plane %d changed, "
"reacquiring memory\n", plane);
/* Check if the provided plane buffer is large enough */
if (planes[plane].length < q->plane_sizes[plane]) {
- dprintk(1, "qbuf: provided buffer size %u is less than "
+ dprintk(1, "provided buffer size %u is less than "
"setup size %u for plane %d\n",
planes[plane].length,
q->plane_sizes[plane], plane);
@@ -1265,22 +1383,21 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
if (vb->planes[plane].mem_priv) {
if (!reacquired) {
reacquired = true;
- call_vb_qop(vb, buf_cleanup, vb);
+ call_void_vb_qop(vb, buf_cleanup, vb);
}
- call_memop(vb, put_userptr, vb->planes[plane].mem_priv);
+ call_void_memop(vb, put_userptr, vb->planes[plane].mem_priv);
}
vb->planes[plane].mem_priv = NULL;
memset(&vb->v4l2_planes[plane], 0, sizeof(struct v4l2_plane));
/* Acquire each plane's memory */
- mem_priv = call_memop(vb, get_userptr, q->alloc_ctx[plane],
+ mem_priv = call_ptr_memop(vb, get_userptr, q->alloc_ctx[plane],
planes[plane].m.userptr,
planes[plane].length, write);
if (IS_ERR_OR_NULL(mem_priv)) {
- dprintk(1, "qbuf: failed acquiring userspace "
+ dprintk(1, "failed acquiring userspace "
"memory for plane %d\n", plane);
- fail_memop(vb, get_userptr);
ret = mem_priv ? PTR_ERR(mem_priv) : -EINVAL;
goto err;
}
@@ -1302,17 +1419,15 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
*/
ret = call_vb_qop(vb, buf_init, vb);
if (ret) {
- dprintk(1, "qbuf: buffer initialization failed\n");
- fail_vb_qop(vb, buf_init);
+ dprintk(1, "buffer initialization failed\n");
goto err;
}
}
ret = call_vb_qop(vb, buf_prepare, vb);
if (ret) {
- dprintk(1, "qbuf: buffer preparation failed\n");
- fail_vb_qop(vb, buf_prepare);
- call_vb_qop(vb, buf_cleanup, vb);
+ dprintk(1, "buffer preparation failed\n");
+ call_void_vb_qop(vb, buf_cleanup, vb);
goto err;
}
@@ -1321,7 +1436,7 @@ err:
/* In case of errors, release planes that were already acquired */
for (plane = 0; plane < vb->num_planes; ++plane) {
if (vb->planes[plane].mem_priv)
- call_memop(vb, put_userptr, vb->planes[plane].mem_priv);
+ call_void_memop(vb, put_userptr, vb->planes[plane].mem_priv);
vb->planes[plane].mem_priv = NULL;
vb->v4l2_planes[plane].m.userptr = 0;
vb->v4l2_planes[plane].length = 0;
@@ -1331,20 +1446,6 @@ err:
}
/**
- * __qbuf_mmap() - handle qbuf of an MMAP buffer
- */
-static int __qbuf_mmap(struct vb2_buffer *vb, const struct v4l2_buffer *b)
-{
- int ret;
-
- __fill_vb2_buffer(vb, b, vb->v4l2_planes);
- ret = call_vb_qop(vb, buf_prepare, vb);
- if (ret)
- fail_vb_qop(vb, buf_prepare);
- return ret;
-}
-
-/**
* __qbuf_dmabuf() - handle qbuf of a DMABUF buffer
*/
static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
@@ -1357,6 +1458,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
int write = !V4L2_TYPE_IS_OUTPUT(q->type);
bool reacquired = vb->planes[0].mem_priv == NULL;
+ memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
__fill_vb2_buffer(vb, b, planes);
@@ -1364,7 +1466,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
struct dma_buf *dbuf = dma_buf_get(planes[plane].m.fd);
if (IS_ERR_OR_NULL(dbuf)) {
- dprintk(1, "qbuf: invalid dmabuf fd for plane %d\n",
+ dprintk(1, "invalid dmabuf fd for plane %d\n",
plane);
ret = -EINVAL;
goto err;
@@ -1374,9 +1476,8 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
if (planes[plane].length == 0)
planes[plane].length = dbuf->size;
- if (planes[plane].length < planes[plane].data_offset +
- q->plane_sizes[plane]) {
- dprintk(1, "qbuf: invalid dmabuf length for plane %d\n",
+ if (planes[plane].length < q->plane_sizes[plane]) {
+ dprintk(1, "invalid dmabuf length for plane %d\n",
plane);
ret = -EINVAL;
goto err;
@@ -1389,11 +1490,11 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
continue;
}
- dprintk(1, "qbuf: buffer for plane %d changed\n", plane);
+ dprintk(1, "buffer for plane %d changed\n", plane);
if (!reacquired) {
reacquired = true;
- call_vb_qop(vb, buf_cleanup, vb);
+ call_void_vb_qop(vb, buf_cleanup, vb);
}
/* Release previously acquired memory if present */
@@ -1401,11 +1502,10 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
memset(&vb->v4l2_planes[plane], 0, sizeof(struct v4l2_plane));
/* Acquire each plane's memory */
- mem_priv = call_memop(vb, attach_dmabuf, q->alloc_ctx[plane],
+ mem_priv = call_ptr_memop(vb, attach_dmabuf, q->alloc_ctx[plane],
dbuf, planes[plane].length, write);
if (IS_ERR(mem_priv)) {
- dprintk(1, "qbuf: failed to attach dmabuf\n");
- fail_memop(vb, attach_dmabuf);
+ dprintk(1, "failed to attach dmabuf\n");
ret = PTR_ERR(mem_priv);
dma_buf_put(dbuf);
goto err;
@@ -1422,9 +1522,8 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
for (plane = 0; plane < vb->num_planes; ++plane) {
ret = call_memop(vb, map_dmabuf, vb->planes[plane].mem_priv);
if (ret) {
- dprintk(1, "qbuf: failed to map dmabuf for plane %d\n",
+ dprintk(1, "failed to map dmabuf for plane %d\n",
plane);
- fail_memop(vb, map_dmabuf);
goto err;
}
vb->planes[plane].dbuf_mapped = 1;
@@ -1444,17 +1543,15 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
*/
ret = call_vb_qop(vb, buf_init, vb);
if (ret) {
- dprintk(1, "qbuf: buffer initialization failed\n");
- fail_vb_qop(vb, buf_init);
+ dprintk(1, "buffer initialization failed\n");
goto err;
}
}
ret = call_vb_qop(vb, buf_prepare, vb);
if (ret) {
- dprintk(1, "qbuf: buffer preparation failed\n");
- fail_vb_qop(vb, buf_prepare);
- call_vb_qop(vb, buf_cleanup, vb);
+ dprintk(1, "buffer preparation failed\n");
+ call_void_vb_qop(vb, buf_cleanup, vb);
goto err;
}
@@ -1479,9 +1576,9 @@ static void __enqueue_in_driver(struct vb2_buffer *vb)
/* sync buffers */
for (plane = 0; plane < vb->num_planes; ++plane)
- call_memop(vb, prepare, vb->planes[plane].mem_priv);
+ call_void_memop(vb, prepare, vb->planes[plane].mem_priv);
- call_vb_qop(vb, buf_queue, vb);
+ call_void_vb_qop(vb, buf_queue, vb);
}
static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
@@ -1492,10 +1589,22 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
ret = __verify_length(vb, b);
if (ret < 0) {
- dprintk(1, "%s(): plane parameters verification failed: %d\n",
- __func__, ret);
+ dprintk(1, "plane parameters verification failed: %d\n", ret);
return ret;
}
+ if (b->field == V4L2_FIELD_ALTERNATE && V4L2_TYPE_IS_OUTPUT(q->type)) {
+ /*
+ * If the format's field is ALTERNATE, then the buffer's field
+ * should be either TOP or BOTTOM, not ALTERNATE since that
+ * makes no sense. The driver has to know whether the
+ * buffer represents a top or a bottom field in order to
+ * program any DMA correctly. Using ALTERNATE is wrong, since
+ * that just says that it is either a top or a bottom field,
+ * but not which of the two it is.
+ */
+ dprintk(1, "the field is incorrectly set to ALTERNATE for an output buffer\n");
+ return -EINVAL;
+ }
vb->state = VB2_BUF_STATE_PREPARING;
vb->v4l2_buf.timestamp.tv_sec = 0;
@@ -1520,9 +1629,9 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
* mmap_sem and then takes the driver's lock again.
*/
mmap_sem = &current->mm->mmap_sem;
- call_qop(q, wait_prepare, q);
+ call_void_qop(q, wait_prepare, q);
down_read(mmap_sem);
- call_qop(q, wait_finish, q);
+ call_void_qop(q, wait_finish, q);
ret = __qbuf_userptr(vb, b);
@@ -1537,7 +1646,7 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
}
if (ret)
- dprintk(1, "qbuf: buffer preparation failed: %d\n", ret);
+ dprintk(1, "buffer preparation failed: %d\n", ret);
vb->state = ret ? VB2_BUF_STATE_DEQUEUED : VB2_BUF_STATE_PREPARED;
return ret;
@@ -1547,23 +1656,23 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b,
const char *opname)
{
if (b->type != q->type) {
- dprintk(1, "%s(): invalid buffer type\n", opname);
+ dprintk(1, "%s: invalid buffer type\n", opname);
return -EINVAL;
}
if (b->index >= q->num_buffers) {
- dprintk(1, "%s(): buffer index out of range\n", opname);
+ dprintk(1, "%s: buffer index out of range\n", opname);
return -EINVAL;
}
if (q->bufs[b->index] == NULL) {
/* Should never happen */
- dprintk(1, "%s(): buffer is NULL\n", opname);
+ dprintk(1, "%s: buffer is NULL\n", opname);
return -EINVAL;
}
if (b->memory != q->memory) {
- dprintk(1, "%s(): invalid memory type\n", opname);
+ dprintk(1, "%s: invalid memory type\n", opname);
return -EINVAL;
}
@@ -1590,8 +1699,8 @@ int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b)
struct vb2_buffer *vb;
int ret;
- if (q->fileio) {
- dprintk(1, "%s(): file io in progress\n", __func__);
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "file io in progress\n");
return -EBUSY;
}
@@ -1601,7 +1710,7 @@ int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b)
vb = q->bufs[b->index];
if (vb->state != VB2_BUF_STATE_DEQUEUED) {
- dprintk(1, "%s(): invalid buffer state %d\n", __func__,
+ dprintk(1, "invalid buffer state %d\n",
vb->state);
return -EINVAL;
}
@@ -1611,7 +1720,7 @@ int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b)
/* Fill buffer information for the userspace */
__fill_v4l2_buffer(vb, b);
- dprintk(1, "%s() of buffer %d succeeded\n", __func__, vb->v4l2_buf.index);
+ dprintk(1, "prepare of buffer %d succeeded\n", vb->v4l2_buf.index);
}
return ret;
}
@@ -1647,8 +1756,7 @@ static int vb2_start_streaming(struct vb2_queue *q)
if (!ret)
return 0;
- fail_qop(q, start_streaming);
- dprintk(1, "qbuf: driver refused to start streaming\n");
+ dprintk(1, "driver refused to start streaming\n");
if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
unsigned i;
@@ -1686,11 +1794,10 @@ static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
case VB2_BUF_STATE_PREPARED:
break;
case VB2_BUF_STATE_PREPARING:
- dprintk(1, "qbuf: buffer still being prepared\n");
+ dprintk(1, "buffer still being prepared\n");
return -EINVAL;
default:
- dprintk(1, "%s(): invalid buffer state %d\n", __func__,
- vb->state);
+ dprintk(1, "invalid buffer state %d\n", vb->state);
return -EINVAL;
}
@@ -1737,7 +1844,7 @@ static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
return ret;
}
- dprintk(1, "%s() of buffer %d succeeded\n", __func__, vb->v4l2_buf.index);
+ dprintk(1, "qbuf of buffer %d succeeded\n", vb->v4l2_buf.index);
return 0;
}
@@ -1760,8 +1867,8 @@ static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
*/
int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
{
- if (q->fileio) {
- dprintk(1, "%s(): file io in progress\n", __func__);
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "file io in progress\n");
return -EBUSY;
}
@@ -1790,7 +1897,7 @@ static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
int ret;
if (!q->streaming) {
- dprintk(1, "Streaming off, will not wait for buffers\n");
+ dprintk(1, "streaming off, will not wait for buffers\n");
return -EINVAL;
}
@@ -1802,7 +1909,7 @@ static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
}
if (nonblocking) {
- dprintk(1, "Nonblocking and no buffers to dequeue, "
+ dprintk(1, "nonblocking and no buffers to dequeue, "
"will not wait\n");
return -EAGAIN;
}
@@ -1812,12 +1919,12 @@ static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
* become ready or for streamoff. Driver's lock is released to
* allow streamoff or qbuf to be called while waiting.
*/
- call_qop(q, wait_prepare, q);
+ call_void_qop(q, wait_prepare, q);
/*
* All locks have been released, it is safe to sleep now.
*/
- dprintk(3, "Will sleep waiting for buffers\n");
+ dprintk(3, "will sleep waiting for buffers\n");
ret = wait_event_interruptible(q->done_wq,
!list_empty(&q->done_list) || !q->streaming);
@@ -1825,9 +1932,9 @@ static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
* We need to reevaluate both conditions again after reacquiring
* the locks or return an error if one occurred.
*/
- call_qop(q, wait_finish, q);
+ call_void_qop(q, wait_finish, q);
if (ret) {
- dprintk(1, "Sleep was interrupted\n");
+ dprintk(1, "sleep was interrupted\n");
return ret;
}
}
@@ -1882,7 +1989,7 @@ static int __vb2_get_done_vb(struct vb2_queue *q, struct vb2_buffer **vb,
int vb2_wait_for_all_buffers(struct vb2_queue *q)
{
if (!q->streaming) {
- dprintk(1, "Streaming off, will not wait for buffers\n");
+ dprintk(1, "streaming off, will not wait for buffers\n");
return -EINVAL;
}
@@ -1911,7 +2018,7 @@ static void __vb2_dqbuf(struct vb2_buffer *vb)
for (i = 0; i < vb->num_planes; ++i) {
if (!vb->planes[i].dbuf_mapped)
continue;
- call_memop(vb, unmap_dmabuf, vb->planes[i].mem_priv);
+ call_void_memop(vb, unmap_dmabuf, vb->planes[i].mem_priv);
vb->planes[i].dbuf_mapped = 0;
}
}
@@ -1922,7 +2029,7 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
int ret;
if (b->type != q->type) {
- dprintk(1, "dqbuf: invalid buffer type\n");
+ dprintk(1, "invalid buffer type\n");
return -EINVAL;
}
ret = __vb2_get_done_vb(q, &vb, b, nonblocking);
@@ -1931,17 +2038,17 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
switch (vb->state) {
case VB2_BUF_STATE_DONE:
- dprintk(3, "dqbuf: Returning done buffer\n");
+ dprintk(3, "returning done buffer\n");
break;
case VB2_BUF_STATE_ERROR:
- dprintk(3, "dqbuf: Returning done buffer with errors\n");
+ dprintk(3, "returning done buffer with errors\n");
break;
default:
- dprintk(1, "dqbuf: Invalid buffer state\n");
+ dprintk(1, "invalid buffer state\n");
return -EINVAL;
}
- call_vb_qop(vb, buf_finish, vb);
+ call_void_vb_qop(vb, buf_finish, vb);
/* Fill buffer information for the userspace */
__fill_v4l2_buffer(vb, b);
@@ -1980,8 +2087,8 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
*/
int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking)
{
- if (q->fileio) {
- dprintk(1, "dqbuf: file io in progress\n");
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "file io in progress\n");
return -EBUSY;
}
return vb2_internal_dqbuf(q, b, nonblocking);
@@ -2003,10 +2110,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q)
* buffers.
*/
if (q->start_streaming_called)
- call_qop(q, stop_streaming, q);
- q->streaming = 0;
- q->start_streaming_called = 0;
- q->queued_count = 0;
+ call_void_qop(q, stop_streaming, q);
if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
for (i = 0; i < q->num_buffers; ++i)
@@ -2016,6 +2120,10 @@ static void __vb2_queue_cancel(struct vb2_queue *q)
WARN_ON(atomic_read(&q->owned_by_drv_count));
}
+ q->streaming = 0;
+ q->start_streaming_called = 0;
+ q->queued_count = 0;
+
/*
* Remove all buffers from videobuf's list...
*/
@@ -2042,7 +2150,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q)
if (vb->state != VB2_BUF_STATE_DEQUEUED) {
vb->state = VB2_BUF_STATE_PREPARED;
- call_vb_qop(vb, buf_finish, vb);
+ call_void_vb_qop(vb, buf_finish, vb);
}
__vb2_dqbuf(vb);
}
@@ -2053,26 +2161,22 @@ static int vb2_internal_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
int ret;
if (type != q->type) {
- dprintk(1, "streamon: invalid stream type\n");
+ dprintk(1, "invalid stream type\n");
return -EINVAL;
}
if (q->streaming) {
- dprintk(3, "streamon successful: already streaming\n");
+ dprintk(3, "already streaming\n");
return 0;
}
if (!q->num_buffers) {
- dprintk(1, "streamon: no buffers have been allocated\n");
+ dprintk(1, "no buffers have been allocated\n");
return -EINVAL;
}
- if (!q->num_buffers) {
- dprintk(1, "streamon: no buffers have been allocated\n");
- return -EINVAL;
- }
if (q->num_buffers < q->min_buffers_needed) {
- dprintk(1, "streamon: need at least %u allocated buffers\n",
+ dprintk(1, "need at least %u allocated buffers\n",
q->min_buffers_needed);
return -EINVAL;
}
@@ -2091,7 +2195,7 @@ static int vb2_internal_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
q->streaming = 1;
- dprintk(3, "Streamon successful\n");
+ dprintk(3, "successful\n");
return 0;
}
@@ -2110,8 +2214,8 @@ static int vb2_internal_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
*/
int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
{
- if (q->fileio) {
- dprintk(1, "streamon: file io in progress\n");
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "file io in progress\n");
return -EBUSY;
}
return vb2_internal_streamon(q, type);
@@ -2121,7 +2225,7 @@ EXPORT_SYMBOL_GPL(vb2_streamon);
static int vb2_internal_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
{
if (type != q->type) {
- dprintk(1, "streamoff: invalid stream type\n");
+ dprintk(1, "invalid stream type\n");
return -EINVAL;
}
@@ -2136,7 +2240,7 @@ static int vb2_internal_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
*/
__vb2_queue_cancel(q);
- dprintk(3, "Streamoff successful\n");
+ dprintk(3, "successful\n");
return 0;
}
@@ -2157,8 +2261,8 @@ static int vb2_internal_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
*/
int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
{
- if (q->fileio) {
- dprintk(1, "streamoff: file io in progress\n");
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "file io in progress\n");
return -EBUSY;
}
return vb2_internal_streamoff(q, type);
@@ -2211,22 +2315,22 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
struct dma_buf *dbuf;
if (q->memory != V4L2_MEMORY_MMAP) {
- dprintk(1, "Queue is not currently set up for mmap\n");
+ dprintk(1, "queue is not currently set up for mmap\n");
return -EINVAL;
}
if (!q->mem_ops->get_dmabuf) {
- dprintk(1, "Queue does not support DMA buffer exporting\n");
+ dprintk(1, "queue does not support DMA buffer exporting\n");
return -EINVAL;
}
if (eb->flags & ~(O_CLOEXEC | O_ACCMODE)) {
- dprintk(1, "Queue does support only O_CLOEXEC and access mode flags\n");
+ dprintk(1, "queue does support only O_CLOEXEC and access mode flags\n");
return -EINVAL;
}
if (eb->type != q->type) {
- dprintk(1, "qbuf: invalid buffer type\n");
+ dprintk(1, "invalid buffer type\n");
return -EINVAL;
}
@@ -2242,13 +2346,17 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
return -EINVAL;
}
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "expbuf: file io in progress\n");
+ return -EBUSY;
+ }
+
vb_plane = &vb->planes[eb->plane];
- dbuf = call_memop(vb, get_dmabuf, vb_plane->mem_priv, eb->flags & O_ACCMODE);
+ dbuf = call_ptr_memop(vb, get_dmabuf, vb_plane->mem_priv, eb->flags & O_ACCMODE);
if (IS_ERR_OR_NULL(dbuf)) {
- dprintk(1, "Failed to export buffer %d, plane %d\n",
+ dprintk(1, "failed to export buffer %d, plane %d\n",
eb->index, eb->plane);
- fail_memop(vb, get_dmabuf);
return -EINVAL;
}
@@ -2291,12 +2399,12 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
{
unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
struct vb2_buffer *vb;
- unsigned int buffer, plane;
+ unsigned int buffer = 0, plane = 0;
int ret;
unsigned long length;
if (q->memory != V4L2_MEMORY_MMAP) {
- dprintk(1, "Queue is not currently set up for mmap\n");
+ dprintk(1, "queue is not currently set up for mmap\n");
return -EINVAL;
}
@@ -2304,20 +2412,24 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
* Check memory area access mode.
*/
if (!(vma->vm_flags & VM_SHARED)) {
- dprintk(1, "Invalid vma flags, VM_SHARED needed\n");
+ dprintk(1, "invalid vma flags, VM_SHARED needed\n");
return -EINVAL;
}
if (V4L2_TYPE_IS_OUTPUT(q->type)) {
if (!(vma->vm_flags & VM_WRITE)) {
- dprintk(1, "Invalid vma flags, VM_WRITE needed\n");
+ dprintk(1, "invalid vma flags, VM_WRITE needed\n");
return -EINVAL;
}
} else {
if (!(vma->vm_flags & VM_READ)) {
- dprintk(1, "Invalid vma flags, VM_READ needed\n");
+ dprintk(1, "invalid vma flags, VM_READ needed\n");
return -EINVAL;
}
}
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "mmap: file io in progress\n");
+ return -EBUSY;
+ }
/*
* Find the plane corresponding to the offset passed by userspace.
@@ -2341,12 +2453,10 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
}
ret = call_memop(vb, mmap, vb->planes[plane].mem_priv, vma);
- if (ret) {
- fail_memop(vb, mmap);
+ if (ret)
return ret;
- }
- dprintk(3, "Buffer %d, plane %d successfully mapped\n", buffer, plane);
+ dprintk(3, "buffer %d, plane %d successfully mapped\n", buffer, plane);
return 0;
}
EXPORT_SYMBOL_GPL(vb2_mmap);
@@ -2364,7 +2474,7 @@ unsigned long vb2_get_unmapped_area(struct vb2_queue *q,
int ret;
if (q->memory != V4L2_MEMORY_MMAP) {
- dprintk(1, "Queue is not currently set up for mmap\n");
+ dprintk(1, "queue is not currently set up for mmap\n");
return -EINVAL;
}
@@ -2429,7 +2539,7 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait)
/*
* Start file I/O emulator only if streaming API has not been used yet.
*/
- if (q->num_buffers == 0 && q->fileio == NULL) {
+ if (q->num_buffers == 0 && !vb2_fileio_is_active(q)) {
if (!V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_READ) &&
(req_events & (POLLIN | POLLRDNORM))) {
if (__vb2_init_fileio(q, 1))
@@ -2574,6 +2684,7 @@ struct vb2_fileio_buf {
*/
struct vb2_fileio_data {
struct v4l2_requestbuffers req;
+ struct v4l2_plane p;
struct v4l2_buffer b;
struct vb2_fileio_buf bufs[VIDEO_MAX_FRAME];
unsigned int cur_index;
@@ -2634,7 +2745,8 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
fileio->req.count = count;
fileio->req.memory = V4L2_MEMORY_MMAP;
fileio->req.type = q->type;
- ret = vb2_reqbufs(q, &fileio->req);
+ q->fileio = fileio;
+ ret = __reqbufs(q, &fileio->req);
if (ret)
goto err_kfree;
@@ -2663,16 +2775,24 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
* Read mode requires pre queuing of all buffers.
*/
if (read) {
+ bool is_multiplanar = V4L2_TYPE_IS_MULTIPLANAR(q->type);
+
/*
* Queue all buffers.
*/
for (i = 0; i < q->num_buffers; i++) {
struct v4l2_buffer *b = &fileio->b;
+
memset(b, 0, sizeof(*b));
b->type = q->type;
+ if (is_multiplanar) {
+ memset(&fileio->p, 0, sizeof(fileio->p));
+ b->m.planes = &fileio->p;
+ b->length = 1;
+ }
b->memory = q->memory;
b->index = i;
- ret = vb2_qbuf(q, b);
+ ret = vb2_internal_qbuf(q, b);
if (ret)
goto err_reqbufs;
fileio->bufs[i].queued = 1;
@@ -2688,19 +2808,18 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
/*
* Start streaming.
*/
- ret = vb2_streamon(q, q->type);
+ ret = vb2_internal_streamon(q, q->type);
if (ret)
goto err_reqbufs;
- q->fileio = fileio;
-
return ret;
err_reqbufs:
fileio->req.count = 0;
- vb2_reqbufs(q, &fileio->req);
+ __reqbufs(q, &fileio->req);
err_kfree:
+ q->fileio = NULL;
kfree(fileio);
return ret;
}
@@ -2738,9 +2857,18 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
{
struct vb2_fileio_data *fileio;
struct vb2_fileio_buf *buf;
+ bool is_multiplanar = V4L2_TYPE_IS_MULTIPLANAR(q->type);
+ /*
+ * When using write() to write data to an output video node the vb2 core
+ * should set timestamps if V4L2_BUF_FLAG_TIMESTAMP_COPY is set. Nobody
+ * else is able to provide this information with the write() operation.
+ */
+ bool set_timestamp = !read &&
+ (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
+ V4L2_BUF_FLAG_TIMESTAMP_COPY;
int ret, index;
- dprintk(3, "file io: mode %s, offset %ld, count %zd, %sblocking\n",
+ dprintk(3, "mode %s, offset %ld, count %zd, %sblocking\n",
read ? "read" : "write", (long)*ppos, count,
nonblock ? "non" : "");
@@ -2750,9 +2878,9 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
/*
* Initialize emulator on first call.
*/
- if (!q->fileio) {
+ if (!vb2_fileio_is_active(q)) {
ret = __vb2_init_fileio(q, read);
- dprintk(3, "file io: vb2_init_fileio result: %d\n", ret);
+ dprintk(3, "vb2_init_fileio result: %d\n", ret);
if (ret)
return ret;
}
@@ -2769,8 +2897,13 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
memset(&fileio->b, 0, sizeof(fileio->b));
fileio->b.type = q->type;
fileio->b.memory = q->memory;
+ if (is_multiplanar) {
+ memset(&fileio->p, 0, sizeof(fileio->p));
+ fileio->b.m.planes = &fileio->p;
+ fileio->b.length = 1;
+ }
ret = vb2_internal_dqbuf(q, &fileio->b, nonblock);
- dprintk(5, "file io: vb2_dqbuf result: %d\n", ret);
+ dprintk(5, "vb2_dqbuf result: %d\n", ret);
if (ret)
return ret;
fileio->dq_count += 1;
@@ -2800,14 +2933,14 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
/*
* Transfer data to userspace.
*/
- dprintk(3, "file io: copying %zd bytes - buffer %d, offset %u\n",
+ dprintk(3, "copying %zd bytes - buffer %d, offset %u\n",
count, index, buf->pos);
if (read)
ret = copy_to_user(data, buf->vaddr + buf->pos, count);
else
ret = copy_from_user(buf->vaddr + buf->pos, data, count);
if (ret) {
- dprintk(3, "file io: error copying data\n");
+ dprintk(3, "error copying data\n");
return -EFAULT;
}
@@ -2827,7 +2960,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
*/
if (read && (fileio->flags & VB2_FILEIO_READ_ONCE) &&
fileio->dq_count == 1) {
- dprintk(3, "file io: read limit reached\n");
+ dprintk(3, "read limit reached\n");
return __vb2_cleanup_fileio(q);
}
@@ -2839,8 +2972,16 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
fileio->b.memory = q->memory;
fileio->b.index = index;
fileio->b.bytesused = buf->pos;
+ if (is_multiplanar) {
+ memset(&fileio->p, 0, sizeof(fileio->p));
+ fileio->p.bytesused = buf->pos;
+ fileio->b.m.planes = &fileio->p;
+ fileio->b.length = 1;
+ }
+ if (set_timestamp)
+ v4l2_get_timestamp(&fileio->b.timestamp);
ret = vb2_internal_qbuf(q, &fileio->b);
- dprintk(5, "file io: vb2_dbuf result: %d\n", ret);
+ dprintk(5, "vb2_dbuf result: %d\n", ret);
if (ret)
return ret;
@@ -2890,6 +3031,147 @@ size_t vb2_write(struct vb2_queue *q, const char __user *data, size_t count,
}
EXPORT_SYMBOL_GPL(vb2_write);
+struct vb2_threadio_data {
+ struct task_struct *thread;
+ vb2_thread_fnc fnc;
+ void *priv;
+ bool stop;
+};
+
+static int vb2_thread(void *data)
+{
+ struct vb2_queue *q = data;
+ struct vb2_threadio_data *threadio = q->threadio;
+ struct vb2_fileio_data *fileio = q->fileio;
+ bool set_timestamp = false;
+ int prequeue = 0;
+ int index = 0;
+ int ret = 0;
+
+ if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+ prequeue = q->num_buffers;
+ set_timestamp =
+ (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
+ V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ }
+
+ set_freezable();
+
+ for (;;) {
+ struct vb2_buffer *vb;
+
+ /*
+ * Call vb2_dqbuf to get buffer back.
+ */
+ memset(&fileio->b, 0, sizeof(fileio->b));
+ fileio->b.type = q->type;
+ fileio->b.memory = q->memory;
+ if (prequeue) {
+ fileio->b.index = index++;
+ prequeue--;
+ } else {
+ call_void_qop(q, wait_finish, q);
+ ret = vb2_internal_dqbuf(q, &fileio->b, 0);
+ call_void_qop(q, wait_prepare, q);
+ dprintk(5, "file io: vb2_dqbuf result: %d\n", ret);
+ }
+ if (threadio->stop)
+ break;
+ if (ret)
+ break;
+ try_to_freeze();
+
+ vb = q->bufs[fileio->b.index];
+ if (!(fileio->b.flags & V4L2_BUF_FLAG_ERROR))
+ ret = threadio->fnc(vb, threadio->priv);
+ if (ret)
+ break;
+ call_void_qop(q, wait_finish, q);
+ if (set_timestamp)
+ v4l2_get_timestamp(&fileio->b.timestamp);
+ ret = vb2_internal_qbuf(q, &fileio->b);
+ call_void_qop(q, wait_prepare, q);
+ if (ret)
+ break;
+ }
+
+ /* Hmm, linux becomes *very* unhappy without this ... */
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ return 0;
+}
+
+/*
+ * This function should not be used for anything else but the videobuf2-dvb
+ * support. If you think you have another good use-case for this, then please
+ * contact the linux-media mailinglist first.
+ */
+int vb2_thread_start(struct vb2_queue *q, vb2_thread_fnc fnc, void *priv,
+ const char *thread_name)
+{
+ struct vb2_threadio_data *threadio;
+ int ret = 0;
+
+ if (q->threadio)
+ return -EBUSY;
+ if (vb2_is_busy(q))
+ return -EBUSY;
+ if (WARN_ON(q->fileio))
+ return -EBUSY;
+
+ threadio = kzalloc(sizeof(*threadio), GFP_KERNEL);
+ if (threadio == NULL)
+ return -ENOMEM;
+ threadio->fnc = fnc;
+ threadio->priv = priv;
+
+ ret = __vb2_init_fileio(q, !V4L2_TYPE_IS_OUTPUT(q->type));
+ dprintk(3, "file io: vb2_init_fileio result: %d\n", ret);
+ if (ret)
+ goto nomem;
+ q->threadio = threadio;
+ threadio->thread = kthread_run(vb2_thread, q, "vb2-%s", thread_name);
+ if (IS_ERR(threadio->thread)) {
+ ret = PTR_ERR(threadio->thread);
+ threadio->thread = NULL;
+ goto nothread;
+ }
+ return 0;
+
+nothread:
+ __vb2_cleanup_fileio(q);
+nomem:
+ kfree(threadio);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(vb2_thread_start);
+
+int vb2_thread_stop(struct vb2_queue *q)
+{
+ struct vb2_threadio_data *threadio = q->threadio;
+ struct vb2_fileio_data *fileio = q->fileio;
+ int err;
+
+ if (threadio == NULL)
+ return 0;
+ call_void_qop(q, wait_finish, q);
+ threadio->stop = true;
+ vb2_internal_streamoff(q, q->type);
+ call_void_qop(q, wait_prepare, q);
+ q->fileio = NULL;
+ fileio->req.count = 0;
+ vb2_reqbufs(q, &fileio->req);
+ kfree(fileio);
+ err = kthread_stop(threadio->thread);
+ threadio->thread = NULL;
+ kfree(threadio);
+ q->fileio = NULL;
+ q->threadio = NULL;
+ return err;
+}
+EXPORT_SYMBOL_GPL(vb2_thread_stop);
/*
* The following functions are not part of the vb2 core API, but are helper
@@ -3116,7 +3398,7 @@ unsigned int vb2_fop_poll(struct file *file, poll_table *wait)
/* Try to be smart: only lock if polling might start fileio,
otherwise locking will only introduce unwanted delays. */
- if (q->num_buffers == 0 && q->fileio == NULL) {
+ if (q->num_buffers == 0 && !vb2_fileio_is_active(q)) {
if (!V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_READ) &&
(req_events & (POLLIN | POLLRDNORM)))
must_lock = true;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.