[PATCH v8 0/2] Fix dma mapping when the cache is coherent
gregory.clement at free-electrons.com
Wed Apr 20 16:02:29 PDT 2016
On sam., avril 16 2016, Marcin Wojtas <mw at semihalf.com> wrote:
> Hi Gregory,
> You can re-add my tested-by. Hang is no longer a problem with your
> patch during my test of neta.
The patch was already submitted in the Russell King's Patch Tracking
System, so I can't add the tested-by on them, but I am sure it will help
these pacthes to be merged.
> Best regards,
> 2016-04-12 17:31 GMT+02:00 Gregory CLEMENT <gregory.clement at free-electrons.com>:
>> These two patches fixes the dma mapping functions when the system is
>> cache coherent. The first one allows to fix an issue we have on Armada
>> 375/38x with the PL310 that's why it is tagged for stable too.
>> PS: the mailing list was missing in the recipient list of the v7. It
>> was a mistake and I realized it only now. If needed I can repost it
>> with the few exchange we had with Russell King.
>> v7 -> v8:
>> - Use a flag instead of a boolean for checking the coherency. It
>> improve the readability of the code. Suggested by Russell King.
>> - Consider that when coherency is set, it's for both L1 and L2 caches
>> - Use the arm_dma_alloc_args struct to pass the coherency status when
>> possible. Suggested by Rabin Vincent
>> - Remove the Tested-by flag from Marcin because of the modifications
>> around the L1 cache management in this series.
>> v6 -> v7:
>> - Renamed is coherent by l2_coherent as suggested by Russell
>> v5 -> v6:
>> - Rebased on v4.6-rc1
>> v4 -> v5
>> - Keep the dmac_* function outside the !is_coherent case.
>> v3 -> v4:
>> - Rebased on v4.3-rc1
>> - Fix conflict with commit "21caf3a765b0 ARM: 8398/1: arm DMA: Fix
>> allocation from CMA for coherent DMA"
>> v2 -> v3:
>> - Fix comments in patch 1 as suggested by Catalin.
>> - Fix build issues in patch 2 (by using the multi_v7_defconfig +
>> - Add the arm_coherent_iommu_mmap_attrs function.
>> Gregory CLEMENT (2):
>> ARM: dma-mapping: Don't use outer_flush_range when the L2C is coherent
>> ARM: dma-mapping: Fix the coherent case when iommu is used
>> arch/arm/mm/dma-mapping.c | 144 +++++++++++++++++++++++++++++++++-------------
>> 1 file changed, 105 insertions(+), 39 deletions(-)
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
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