Skip to content

L
linux
Switch branch/tag
  1. 31 Aug, 2011 2 commits
    • Marek Olšák's avatar
      drm/radeon/kms: add a new gem_wait ioctl with read/write flags · d3ed7402
      Marek Olšák authored 
      The new DRM_RADEON_GEM_WAIT ioctl combines GEM_WAIT_IDLE and GEM_BUSY (there
is a NO_WAIT flag to get the latter) with USAGE_READ and USAGE_WRITE flags
to take advantage of the new ttm_bo_wait changes.

Also bump the DRM version.
Signed-off-by: default avatarMarek Olšák <maraeo@gmail.com>
Reviewed-by: default avatarJerome Glisse <jglisse@redhat.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      d3ed7402
    • Marek Olšák's avatar
      drm/ttm: add a way to bo_wait for either the last read or last write · dfadbbdb
      Marek Olšák authored 
      Sometimes we want to know whether a buffer is busy and wait for it (bo_wait).
However, sometimes it would be more useful to be able to query whether
a buffer is busy and being either read or written, and wait until it's stopped
being either read or written. The point of this is to be able to avoid
unnecessary waiting, e.g. if a GPU has written something to a buffer and is now
reading that buffer, and a CPU wants to map that buffer for read, it needs to
only wait for the last write. If there were no write, there wouldn't be any
waiting needed.

This, or course, requires user space drivers to send read/write flags
with each relocation (like we have read/write domains in radeon, so we can
actually use those for something useful now).

Now how this patch works:

The read/write flags should passed to ttm_validate_buffer. TTM maintains
separate sync objects of the last read and write for each buffer, in addition
to the sync object of the last use of a buffer. ttm_bo_wait then operates
with one the sync objects.
Signed-off-by: default avatarMarek Olšák <maraeo@gmail.com>
Reviewed-by: default avatarJerome Glisse <jglisse@redhat.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      dfadbbdb
  3. 30 Aug, 2011 4 commits
  5. 29 Aug, 2011 2 commits
  7. 28 Aug, 2011 1 commit
  9. 27 Aug, 2011 2 commits
  11. 26 Aug, 2011 13 commits
  13. 25 Aug, 2011 16 commits
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7