1. 02 Nov, 2013 1 commit
  2. 31 Oct, 2013 1 commit
    • Alexandre Rames's avatar
      sfc: Fix DMA unmapping issue with firmware assisted TSO · 2acdb92e
      Alexandre Rames authored
      When using firmware assisted TSO, we use a single DMA mapping for
      the linear area of a TSO skb.
      
      We still have to segment the super-packet and insert a descriptor
      containing the original headers before each segment of payload, so we
      can unmap the linear area only after the last segment is completed.
      The unmapping information for the linear area is therefore associated
      with the last header descriptor.
      
      We calculate the DMA address to unmap from using the map length and
      the invariant that the end of the DMA mapping matches the end of
      the data referenced by the last descriptor.  But this invariant is
      broken when there is TCP payload in the linear area.
      
      Fix this by adding and using an explicit dma_offset field.
      Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
      2acdb92e
  3. 30 Oct, 2013 13 commits
  4. 29 Oct, 2013 25 commits