[v3,0/4] NVIDIA Tegra Video Decoder driver improvements

Message

Dmitry Osipenko June 23, 2019, 5:07 p.m. UTC

Hello,

This series cleans up some of minor shortcomings that are caused by
checkpatch recommendations that are not very applicable for the driver.
Then IOMMU support is added to the driver and now it can handle sparse
memory buffers that GPU hands to VDE in a default kernel configuration
on Tegra30+.

Changelog:

v3: - Fixed memory leak on driver's module reload. For some reason I
      erroneously assumed that IOVA reservations are released on IOVA
      destruction themselves.

    - Corrected PFN's for the last-page's IOVA reservation. We want to
      reserve the last page, but a page before the last was reserved.

v2: - Fixed use-after-free bug and uninitialized-variable warning that
      were reported by smatch and pointed out by Hans Verkuil in the
      review comment to v1.

    - Fixed build failure when CONFIG_ARM_DMA_USE_IOMMU=y and tested this
      case properly (multi-platform kernel config).

    - Made some extra minor changes, prettifying code a tad more.

Dmitry Osipenko (4):
  staging: media: tegra-vde: Remove BIT() macro from UAPI header
  staging: media: tegra-vde: Manually pack UAPI structures
  staging: media: tegra-vde: Add IOMMU support
  staging: media: tegra-vde: Defer dmabuf's unmapping

 drivers/staging/media/tegra-vde/Kconfig       |   1 +
 drivers/staging/media/tegra-vde/Makefile      |   1 +
 .../staging/media/tegra-vde/dmabuf-cache.c    | 226 ++++++++++++++++++
 drivers/staging/media/tegra-vde/iommu.c       | 157 ++++++++++++
 drivers/staging/media/tegra-vde/trace.h       |   2 +
 drivers/staging/media/tegra-vde/uapi.h        |  48 ++--
 .../media/tegra-vde/{tegra-vde.c => vde.c}    | 212 ++++++----------
 drivers/staging/media/tegra-vde/vde.h         | 107 +++++++++
 8 files changed, 591 insertions(+), 163 deletions(-)
 create mode 100644 drivers/staging/media/tegra-vde/dmabuf-cache.c
 create mode 100644 drivers/staging/media/tegra-vde/iommu.c
 rename drivers/staging/media/tegra-vde/{tegra-vde.c => vde.c} (88%)
 create mode 100644 drivers/staging/media/tegra-vde/vde.h