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    Subject[PATCH -mm 0/11] fix iommu sg merging problem
    IOMMUs merges scatter/gather segments without considering a low level
    driver's restrictions. The problem is that IOMMUs can't access to the
    limitations because they are in request_queue.

    This patchset introduces a new structure, device_dma_parameters,
    including dma information. A pointer to device_dma_parameters is added
    to struct device. The bus specific structures (like pci_dev) includes
    device_dma_parameters. Low level drivers can use dma_set_max_seg_size
    to tell IOMMUs about the restrictions.

    We can move more dma stuff in struct device (like dma_mask) to struct
    device_dma_parameters later (needs some cleanups before that).

    This includes patches for all the IOMMUs that could merge sg (x86_64,
    ppc, IA64, alpha, sparc64, and parisc) though only the ppc patch was
    tested. The patches for other IOMMUs are only compile tested.

    Thanks to everyone for the comments on the previous submission
    to linux-scsi.

    This is against 2.6.24-rc1. The same patchset is also available:

    git:// iommu-sg-fixes
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      Last update: 2007-10-24 12:53    [W:0.041 / U:97.516 seconds]
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