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buffer: refine write-back and invalidate logic for produce/consume #87

Merged
merged 1 commit into from
Jul 12, 2018
Merged

buffer: refine write-back and invalidate logic for produce/consume #87

merged 1 commit into from
Jul 12, 2018

Commits on Jul 12, 2018

  1. buffer: refine write-back and invalidate logic for produce/consume 

    We only need to handle data consistency for buffer and cache when
new data produced:
1. source(DMA) --> buffer --> sink(non-DMA): invalidate cache.
2. source(non-DMA) --> buffer --> sink(DMA): write back to memory.
3. source(DMA) --> buffer --> sink(DMA): do nothing.
4. source(non-DMA) --> buffer --> sink(non-DMA): do nothing.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
    @keyonjie
    keyonjie committed Jul 12, 2018
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