Messages in this thread | | | Date | Sat, 20 Aug 2022 23:17:44 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH] mmc: sdhci-xenon: Fix 2G limitation on AC5 SoC |
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On Thu, Aug 18, 2022 at 03:07:40PM +0300, Vadym Kochan wrote: > It works with the following changes: > > #1 dma-ranges = <0x0 0x0 0x2 0x0 0x0 0x80000000>; > > #3 swiotlb="force" > > Is it OK to force the memory allocation from the start for the swiotlb ?
It should be ok, but isn't really optimal.
I wonder if we should just allow DT to specify the swiotlb buffer location. Basically have yet another RESERVEDMEM_OF_DECLARE variant for it, which shouldn't be all that much work except for figuring out the interaction with the various kernel command line options.
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