)]}'
{
  "commit": "17a941d854a3f7b0bb916fdeee4c9ffdcc19d8d3",
  "tree": "b6b3b55318336adf769bf57141a01a9defbbb202",
  "parents": [
    "8a6fdd3e912e0ce6f723431d66baf704bf8a1d26"
  ],
  "author": {
    "name": "Muli Ben-Yehuda",
    "email": "mulix@mulix.org",
    "time": "Wed Jan 11 22:44:42 2006 +0100"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@g5.osdl.org",
    "time": "Wed Jan 11 19:04:55 2006 -0800"
  },
  "message": "[PATCH] x86_64: Use function pointers to call DMA mapping functions\n\nAK: I hacked Muli\u0027s original patch a lot and there were a lot\nof changes - all bugs are probably to blame on me now.\nThere were also some changes in the fall back behaviour\nfor swiotlb - in particular it doesn\u0027t try to use GFP_DMA\nnow anymore. Also all DMA mapping operations use the\nsame core dma_alloc_coherent code with proper fallbacks now.\nAnd various other changes and cleanups.\n\nKnown problems: iommu\u003dforce swiotlb\u003dforce together breaks\n                needs more testing.\n\nThis patch cleans up x86_64\u0027s DMA mapping dispatching code. Right now\nwe have three possible IOMMU types: AGP GART, swiotlb and nommu, and\nin the future we will also have Xen\u0027s x86_64 swiotlb and other HW\nIOMMUs for x86_64. In order to support all of them cleanly, this\npatch:\n\n- introduces a struct dma_mapping_ops with function pointers for each\n  of the DMA mapping operations of gart (AMD HW IOMMU), swiotlb\n  (software IOMMU) and nommu (no IOMMU).\n\n- gets rid of:\n\n  if (swiotlb)\n      return swiotlb_xxx();\n\n- PCI_DMA_BUS_IS_PHYS is now checked against the dma_ops being set\nThis makes swiotlb faster by avoiding double copying in some cases.\n\nSigned-Off-By: Muli Ben-Yehuda \u003cmulix@mulix.org\u003e\nSigned-Off-By: Jon D. Mason \u003cjdmason@us.ibm.com\u003e\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n",
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