Re: [PATCH v7 04/16] drivers: iommu: make of_iommu_set/get_ops() DT agnostic

[Joerg Roedel]

On Fri, Nov 11, 2016 at 04:17:37PM +0000, Robin Murphy wrote:
> In the original of_iommu_configure design, the thought was that an ops
> structure could be IOMMU-instance-specific (hence the later-removed
> "priv" member), so I suppose right now it is mostly a hangover from
> that. However, it's also what we initialise a device's fwspec with, so
> becomes important again if we're ever going to get past the limitations
> of buses-which-are-not-actually-buses[1].

Yeah, I discussed this with a few others at LPC. My current idea is to
tell the iommu-core which hardware-iommus exist in the system and a
seperate iommu_ops ptr for each of them. Then every struct device can
link to the iommu-instance it is translated by.

We are not there yet, but this will give you the same per-device
iommu-ops as implemented here.



	Joerg