[PATCHv2,0/8] videobuf2: support new noncontiguous DMA API

Message

Sergey Senozhatsky April 27, 2021, 1:13 p.m. UTC

Hello,

	The series adds support for noncontiguous DMA API and adds
V4L2_MEMORY_FLAG_NON_COHERENT UAPI.

v2:
-- addressed review feedback [0] (Hans, Tomasz)
-- inverted and renamed vb2_queue.non_coherent_mem member. It's easier
   when we have vb2_queue.coherent_mem instead
-- inverted and renamed the corresponding vb2_dc_buf.non_coherent_mem
   member, for pretty much same reason.

   IOW some semi-intrusive changes.

[0] https://lore.kernel.org/lkml/[e-mail]/

Sergey Senozhatsky (8):
  videobuf2: rework vb2_mem_ops API
  videobuf2: inverse buffer cache_hints flags
  videobuf2: split buffer cache_hints initialisation
  videobuf2: move cache_hints handling to allocators
  videobuf2: add V4L2_MEMORY_FLAG_NON_COHERENT flag
  videobuf2: add queue memory coherency parameter
  videobuf2: handle V4L2_MEMORY_FLAG_NON_COHERENT flag
  videobuf2: handle non-contiguous DMA allocations

 .../userspace-api/media/v4l/buffer.rst        |  40 +++-
 .../media/v4l/vidioc-create-bufs.rst          |   7 +-
 .../media/v4l/vidioc-reqbufs.rst              |  17 +-
 .../media/common/videobuf2/videobuf2-core.c   | 127 ++++++++-----
 .../common/videobuf2/videobuf2-dma-contig.c   | 174 ++++++++++++++----
 .../media/common/videobuf2/videobuf2-dma-sg.c |  39 ++--
 .../media/common/videobuf2/videobuf2-v4l2.c   |  56 +++---
 .../common/videobuf2/videobuf2-vmalloc.c      |  30 +--
 drivers/media/dvb-core/dvb_vb2.c              |   2 +-
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   9 +-
 drivers/media/v4l2-core/v4l2-ioctl.c          |   5 +-
 include/media/videobuf2-core.h                |  59 +++---
 include/uapi/linux/videodev2.h                |  11 +-
 13 files changed, 395 insertions(+), 181 deletions(-)