1. 22 Feb, 2010 1 commit
    • Pauli Nieminen's avatar
      drm: Add generic multipart buffer. · 7a9f0dd9
      Pauli Nieminen authored
      Allocating multiple pages of memory for data that is coming
      from user space may fail. To fix memory allocation failures
      the buffer object should be split to multiple independ pages.
      
      drm buffer provides generic interface to copy and process
      large data arrays from user space.
      
      Interface includes allocation and free functions to allocate
      the buffer object and data storage pages.
      
      All access operations are performed relative to a internal
      pointer which is advanced with drm_buffer_advance function.
      
      The buffer can be accessed using drm_buffer_pointer_to_XXX
      functions if it is known that requested object doesn't split
      over a page boundary. These functions don't do any error
      checking to maximize performance.
      
      If there is large object which could be split there is special
      drm_buffer_read_object function. drm_buffer_read_object takes
      a pointer as argument which is used as temporary store for
      data if it is split over boundary in the buffer.
      Signed-off-by: default avatarPauli Nieminen <suokkos@gmail.com>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      7a9f0dd9
  2. 18 Feb, 2010 10 commits
  3. 15 Feb, 2010 3 commits
  4. 11 Feb, 2010 9 commits
  5. 08 Feb, 2010 17 commits