Re: [PATCHv3 14/19] iommu/tegra: smmu: Get "nvidia,memory-clients" from DT

On Thu, Oct 31, 2013 at 07:25:25PM +0000, Stephen Warren wrote:

On 10/31/2013 01:16 PM, Stephen Warren wrote:

quoted

Hmm. That's interesting. I see that the ARM SMMU has a list of the
clients it affects, whereas this Tegra series puts information into each
client device about the SMMU(s) that affect it. Is it better to flip the
Tegra binding around to match the style of the ARM SMMU?

One question here: How do you ensure that the SMMU driver probe()s
before probe() runs for devices affected by the SMMU?

I think we get away with this by virtue of nobody actually creating IOMMU
mappings from within drivers, so the ordering is already handled. However, I
also have a patch queued to move the SMMU initialisation to a
subsys_initcall. I'm not particularly fond of that, but it seems to be the
done thing (even for other architectures).

Will