Hi there, It turns out that a fence object will be one of the next things added to the dma-buf framework. You can check here for an in-progress status page:
https://wiki.linaro.org/WorkingGroups/Middleware/Graphics/UMM/Status And, the best thing for you to do is join the linaro-mm-sig list for these and other discussions. cheers, jesse On Mon, Feb 27, 2012 at 3:52 PM, Westermann Fu <westerman...@gmail.com> wrote: > Hi, guys: > > As I know linaro is working on a unified memory manager for soc world like a > similar one already exists in PC world (gem/ttm). > But I'm curious about how this manager handle the different sync notify > between various different IP vendor? > As we know, on PC the vsp+capture+graphic+display always done by one > unit--the GPU, if a piece of hardware memory buffer wanted to be zero-copied > between vsp/graphic/display there must be some sync/notify mechanism > otherwise the race condition will occur. On gpu always an interrupt driven > object fence can handle it. But in soc, there is no integrated > vsp/graphic/display, they all may come from various independent ip vendor, > so there may no unified interrupt source can be collected by memory manager > to know whether one buffer hasn't be completed by the previous engine and > the next engine should block wait but without cpu blocked too. Thanks > > Regards > > > _______________________________________________ > linaro-dev mailing list > linaro-dev@lists.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-dev > _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
