)]}'
{
  "log": [
    {
      "commit": "fc13020e086bfedf2afb95c91c026d5af1f80107",
      "tree": "a06be5c3eff6865a42046b51270e4d60e30609f4",
      "parents": [
        "6b607e3a658fee490bdabfdeb739a3eb498b1bff"
      ],
      "author": {
        "name": "Daniel Vetter",
        "email": "daniel.vetter@ffwll.ch",
        "time": "Tue Mar 20 00:02:37 2012 +0100"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 26 11:33:02 2012 +0530"
      },
      "message": "dma-buf: add support for kernel cpu access\n\nBig differences to other contenders in the field (like ion) is\nthat this also supports highmem, so we have to split up the cpu\naccess from the kernel side into a prepare and a kmap step.\n\nPrepare is allowed to fail and should do everything required so that\nthe kmap calls can succeed (like swapin/backing storage allocation,\nflushing, ...).\n\nMore in-depth explanations will follow in the follow-up documentation\npatch.\n\nChanges in v2:\n\n- Clear up begin_cpu_access confusion noticed by Sumit Semwal.\n- Don\u0027t automatically fallback from the _atomic variants to the\n  non-atomic variants. The _atomic callbacks are not allowed to\n  sleep, so we want exporters to make this decision explicit. The\n  function signatures are explicit, so simpler exporters can still\n  use the same function for both.\n- Make the unmap functions optional. Simpler exporters with permanent\n  mappings don\u0027t need to do anything at unmap time.\n\nChanges in v3:\n\n- Adjust the WARN_ON checks for the new -\u003eops functions as suggested\n  by Rob Clark and Sumit Semwal.\n- Rebased on top of latest dma-buf-next git.\n\nChanges in v4:\n\n- Fixup a missing - in a return -EINVAL; statement.\n\nSigned-Off-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nSigned-off-by: Rob Clark \u003crob@ti.com\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "6b607e3a658fee490bdabfdeb739a3eb498b1bff",
      "tree": "a10ad6f713586f9dc7584fe54110d1c44f87b1d5",
      "parents": [
        "f9a24d1ac9cb82baf5ec5efdb6580a9ce0bd5bfc"
      ],
      "author": {
        "name": "Daniel Vetter",
        "email": "daniel.vetter@ffwll.ch",
        "time": "Mon Mar 19 00:34:25 2012 +0100"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 26 11:32:50 2012 +0530"
      },
      "message": "dma-buf: don\u0027t hold the mutex around map/unmap calls\n\nThe mutex protects the attachment list and hence needs to be held\naround the callbakc to the exporters (optional) attach/detach\nfunctions.\n\nHolding the mutex around the map/unmap calls doesn\u0027t protect any\ndma_buf state. Exporters need to properly protect any of their own\nstate anyway (to protect against calls from their own interfaces).\nSo this only makes the locking messier (and lockdep easier to anger).\n\nTherefore let\u0027s just drop this.\n\nv2: Rebased on top of latest dma-buf-next git.\n\nSigned-off-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nReviewed-by: Rob Clark \u003crob.clark@linaro.org\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "55c1c4ca23d0f2736ef7c219d0fb005323ff8ee0",
      "tree": "52c2ae868121e09df3d77fc998f233549cf8ae34",
      "parents": [
        "33ea2dcb39ba50b0b69d1b1dc24702f084b46411"
      ],
      "author": {
        "name": "Dave Airlie",
        "email": "airlied@redhat.com",
        "time": "Fri Mar 16 10:34:02 2012 +0000"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 26 11:32:26 2012 +0530"
      },
      "message": "dma-buf: pass flags into dma_buf_fd.\n\nWe need to pass the flags into dma_buf_fd at this point,\nso the flags end up doing the right thing for O_CLOEXEC.\n\nSigned-off-by: Dave Airlie \u003cairlied@redhat.com\u003e\nSigned-off-by: Rob Clark \u003crob@ti.com\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "33ea2dcb39ba50b0b69d1b1dc24702f084b46411",
      "tree": "ec1e1b0c223e09861341f82d2aa0b13ec841be95",
      "parents": [
        "2ed9201bdd9a8e462d768a838fb2bc944c6887a4"
      ],
      "author": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Fri Jan 27 15:09:27 2012 +0530"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 26 11:31:58 2012 +0530"
      },
      "message": "dma-buf: add dma_data_direction to unmap dma_buf_op\n\nSome exporters may use DMA map/unmap APIs in dma-buf ops, which require\nenum dma_data_direction for both map and unmap operations.\n\nThus, the unmap dma_buf_op also needs to have enum dma_data_direction as\na parameter.\n\nReported-by: Tomasz Stanislawski \u003ct.stanislaws@samsung.com\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@ti.com\u003e\nReviewed-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "2ed9201bdd9a8e462d768a838fb2bc944c6887a4",
      "tree": "b205a540211ba7461c82c641c0131e39b11818e3",
      "parents": [
        "a9fbc3b73127efba9276e172daa8d122f0fac1a8"
      ],
      "author": {
        "name": "Laurent Pinchart",
        "email": "laurent.pinchart@ideasonboard.com",
        "time": "Thu Jan 26 12:27:25 2012 +0100"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 19 15:42:15 2012 +0530"
      },
      "message": "dma-buf: Move code out of mutex-protected section in dma_buf_attach()\n\nSome fields can be set without mutex protection. Initialize them before\nlocking the mutex.\n\nSigned-off-by: Laurent Pinchart \u003claurent.pinchart@ideasonboard.com\u003e\nReviewed-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "a9fbc3b73127efba9276e172daa8d122f0fac1a8",
      "tree": "09eb3b471a631217de8c533293571c2d7968981d",
      "parents": [
        "d1aa06a1eaf5f751c9913703031d611599d8d3d7"
      ],
      "author": {
        "name": "Laurent Pinchart",
        "email": "laurent.pinchart@ideasonboard.com",
        "time": "Thu Jan 26 12:27:24 2012 +0100"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 19 15:42:15 2012 +0530"
      },
      "message": "dma-buf: Return error instead of using a goto statement when possible\n\nRemove an error label in dma_buf_attach() that just returns an error\ncode.\n\nSigned-off-by: Laurent Pinchart \u003claurent.pinchart@ideasonboard.com\u003e\nReviewed-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "d1aa06a1eaf5f751c9913703031d611599d8d3d7",
      "tree": "dce298d9d1f7bdb95e8c259c3e304f9322c5d31a",
      "parents": [
        "5375764f9408b8ef1fb8d6cd1ed0efd97dce4824"
      ],
      "author": {
        "name": "Laurent Pinchart",
        "email": "laurent.pinchart@ideasonboard.com",
        "time": "Thu Jan 26 12:27:23 2012 +0100"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 19 15:42:15 2012 +0530"
      },
      "message": "dma-buf: Remove unneeded sanity checks\n\nops, ops-\u003emap_dma_buf and ops-\u003eunmap_dma_buf are guaranteed to be\nnon-NULL by a check in dma_buf_export(). Remove NULL checks on those\nvariables in the other API functions.\n\nSigned-off-by: Laurent Pinchart \u003claurent.pinchart@ideasonboard.com\u003e\nReviewed-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "5375764f9408b8ef1fb8d6cd1ed0efd97dce4824",
      "tree": "05a88e01997b609418de73d53e9f6fbf06add73e",
      "parents": [
        "c16fa4f2ad19908a47c63d8fa436a1178438c7e7"
      ],
      "author": {
        "name": "Laurent Pinchart",
        "email": "laurent.pinchart@ideasonboard.com",
        "time": "Thu Jan 26 12:27:22 2012 +0100"
      },
      "committer": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Mar 19 15:42:14 2012 +0530"
      },
      "message": "dma-buf: Constify ops argument to dma_buf_export()\n\nThis allows drivers to make the dma buf operations structure constant.\n\nSigned-off-by: Laurent Pinchart \u003claurent.pinchart@ideasonboard.com\u003e\nReviewed-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\n"
    },
    {
      "commit": "d15bd7ee445d0702ad801fdaece348fdb79e6581",
      "tree": "6f18212787e77b9615c955506adda516206ecbac",
      "parents": [
        "805a6af8dba5dfdd35ec35dc52ec0122400b2610"
      ],
      "author": {
        "name": "Sumit Semwal",
        "email": "sumit.semwal@ti.com",
        "time": "Mon Dec 26 14:53:15 2011 +0530"
      },
      "committer": {
        "name": "Dave Airlie",
        "email": "airlied@redhat.com",
        "time": "Fri Jan 06 10:20:21 2012 +0000"
      },
      "message": "dma-buf: Introduce dma buffer sharing mechanism\n\nThis is the first step in defining a dma buffer sharing mechanism.\n\nA new buffer object dma_buf is added, with operations and API to allow easy\nsharing of this buffer object across devices.\n\nThe framework allows:\n- creation of a buffer object, its association with a file pointer, and\n   associated allocator-defined operations on that buffer. This operation is\n   called the \u0027export\u0027 operation.\n- different devices to \u0027attach\u0027 themselves to this exported buffer object, to\n  facilitate backing storage negotiation, using dma_buf_attach() API.\n- the exported buffer object to be shared with the other entity by asking for\n   its \u0027file-descriptor (fd)\u0027, and sharing the fd across.\n- a received fd to get the buffer object back, where it can be accessed using\n   the associated exporter-defined operations.\n- the exporter and user to share the scatterlist associated with this buffer\n   object using map_dma_buf and unmap_dma_buf operations.\n\nAtleast one \u0027attach()\u0027 call is required to be made prior to calling the\nmap_dma_buf() operation.\n\nCouple of building blocks in map_dma_buf() are added to ease introduction\nof sync\u0027ing across exporter and users, and late allocation by the exporter.\n\nFor this first version, this framework will work with certain conditions:\n- *ONLY* exporter will be allowed to mmap to userspace (outside of this\n   framework - mmap is not a buffer object operation),\n- currently, *ONLY* users that do not need CPU access to the buffer are\n   allowed.\n\nMore details are there in the documentation patch.\n\nThis is based on design suggestions from many people at the mini-summits[1],\nmost notably from Arnd Bergmann \u003carnd@arndb.de\u003e, Rob Clark \u003crob@ti.com\u003e and\nDaniel Vetter \u003cdaniel@ffwll.ch\u003e.\n\nThe implementation is inspired from proof-of-concept patch-set from\nTomasz Stanislawski \u003ct.stanislaws@samsung.com\u003e, who demonstrated buffer sharing\nbetween two v4l2 devices. [2]\n\n[1]: https://wiki.linaro.org/OfficeofCTO/MemoryManagement\n[2]: http://lwn.net/Articles/454389\n\nSigned-off-by: Sumit Semwal \u003csumit.semwal@linaro.org\u003e\nSigned-off-by: Sumit Semwal \u003csumit.semwal@ti.com\u003e\nReviewed-by: Daniel Vetter \u003cdaniel.vetter@ffwll.ch\u003e\nReviewed-by: Dave Airlie \u003cairlied@redhat.com\u003e\nReviewed-and-Tested-by: Rob Clark \u003crob.clark@linaro.org\u003e\nSigned-off-by: Dave Airlie \u003cairlied@redhat.com\u003e\n"
    }
  ]
}