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[media] omap3isp: queue: Map PFNMAP buffers to device 

Userspace PFNMAP buffers need to be mapped to the device like the
userspace non-PFNMAP buffers in order for the DMA mapping implementation
to create IOMMU mappings when we'll switch to the IOMMU-aware DMA
mapping backend.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Laurent Pinchart 2014-03-08 09:29:15 -03:00 committed by Mauro Carvalho Chehab
parent b8d642826d
commit 49ac3695d0
2 changed files with 23 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/media/platform/omap3isp/ispqueue.c
View File

@ -173,6 +173,7 @@ static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
struct isp_video *video = vfh->video;
enum dma_data_direction direction;
DEFINE_DMA_ATTRS(attrs);
unsigned int i;
if (buf->dma) {
@ -181,11 +182,14 @@ static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
buf->dma = 0;
}
if (!(buf->vm_flags & VM_PFNMAP)) {
if (buf->vbuf.memory == V4L2_MEMORY_USERPTR) {
if (buf->skip_cache)
dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
direction = buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE
? DMA_FROM_DEVICE : DMA_TO_DEVICE;
dma_unmap_sg(buf->queue->dev, buf->sgt.sgl, buf->sgt.orig_nents,
direction);
dma_unmap_sg_attrs(buf->queue->dev, buf->sgt.sgl,
buf->sgt.orig_nents, direction, &attrs);
}
sg_free_table(&buf->sgt);
@ -345,10 +349,6 @@ unlock:
for (sg = buf->sgt.sgl, i = 0; i < buf->npages; ++i, ++pfn) {
sg_set_page(sg, pfn_to_page(pfn), PAGE_SIZE - offset, offset);
/* PFNMAP buffers will not get DMA-mapped, set the DMA address
* manually.
*/
sg_dma_address(sg) = (pfn << PAGE_SHIFT) + offset;
sg = sg_next(sg);
offset = 0;
}
@ -434,12 +434,15 @@ static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
struct isp_video *video = vfh->video;
enum dma_data_direction direction;
DEFINE_DMA_ATTRS(attrs);
unsigned long addr;
int ret;
switch (buf->vbuf.memory) {
case V4L2_MEMORY_MMAP:
ret = isp_video_buffer_prepare_kernel(buf);
if (ret < 0)
goto done;
break;
case V4L2_MEMORY_USERPTR:
@ -451,24 +454,26 @@ static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
ret = isp_video_buffer_prepare_pfnmap(buf);
else
ret = isp_video_buffer_prepare_user(buf);
break;
default:
return -EINVAL;
}
if (ret < 0)
goto done;
if (ret < 0)
goto done;
if (buf->skip_cache)
dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
if (!(buf->vm_flags & VM_PFNMAP)) {
direction = buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE
? DMA_FROM_DEVICE : DMA_TO_DEVICE;
ret = dma_map_sg(buf->queue->dev, buf->sgt.sgl,
buf->sgt.orig_nents, direction);
ret = dma_map_sg_attrs(buf->queue->dev, buf->sgt.sgl,
buf->sgt.orig_nents, direction, &attrs);
if (ret <= 0) {
ret = -EFAULT;
goto done;
}
break;
default:
return -EINVAL;
}
addr = omap_iommu_vmap(video->isp->domain, video->isp->dev, 0,

4
drivers/media/platform/omap3isp/ispqueue.h
View File

@ -72,7 +72,7 @@ enum isp_video_buffer_state {
* @vm_flags: Buffer VMA flags (for userspace buffers)
* @npages: Number of pages (for userspace buffers)
* @pages: Pages table (for userspace non-VM_PFNMAP buffers)
* @sgt: Scatter gather table (for non-VM_PFNMAP buffers)
* @sgt: Scatter gather table
* @vbuf: V4L2 buffer
* @irqlist: List head for insertion into IRQ queue
* @state: Current buffer state
@ -94,7 +94,7 @@ struct isp_video_buffer {
unsigned int npages;
struct page **pages;
/* For all buffers except VM_PFNMAP. */
/* For all buffers. */
struct sg_table sgt;
/* Touched by the interrupt handler. */