2.6.19 merge plans for InfiniBand/RDMA

Here’s a short summary of what I plan to merge for 2.6.19. I sent this out via email to all the relevant lists, but I figured it can’t hurt to blog it too. Some of this is already in infiniband.git (git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband.git), while some still needs to be merged up. Highlights:

  • iWARP core support. This updates drivers/infiniband to work with devices that do RDMA over IP/ethernet in addition to InfiniBand devices. As a first user of this support, I also plan to merge the amso1100 driver for Ammasso RNICs.I will post this for review one more time after I pull it into my git tree for last minute cleanups. But if you feel this iWARP support should not be merged, please let me know why now.
  • IBM eHCA driver, which supports IBM pSeries-specific InfiniBand hardware. This is in the ehca branch of infiniband.git, and I will post it for review one more time. My feeling is that more cleanups are certainly possible, but this driver is “good enough to merge” now and has languished out of tree for long enough. I’m certainly happy to merge cleanup patches, though.
  • mmap()ed userspace work queues for ipath. This is a performance enhancement for QLogic/PathScale HCAs but it does touch core stuff in minor ways. Should not be controversial.
  • I also have the following minor changes queued in the for-2.6.19 branch of infiniband.git:
       Ishai Rabinovitz:
             IB/srp: Add port/device attributes

       James Lentini:
             IB/mthca: Include the header we really want

       Michael S. Tsirkin:
             IB/mthca: Don't use privileged UAR for kernel access
             IB/ipoib: Fix flush/start xmit race (from code review)

       Roland Dreier:
             IB/uverbs: Use idr_read_cq() where appropriate
             IB/uverbs: Fix lockdep warning when QP is created with 2 CQs

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