On Wed, Nov 16, 2016 at 03:29:24PM +0000, Lorenzo Pieralisi wrote:

The of_iommu_{set/get}_ops() API is used to associate a device
tree node with a specific set of IOMMU operations. The same
kernel interface is required on systems booting with ACPI, where
devices are not associated with a device tree node, therefore
the interface requires generalization.

The struct device fwnode member represents the fwnode token associated
with the device and the struct it points at is firmware specific;
regardless, it is initialized on both ACPI and DT systems and makes an
ideal candidate to use it to associate a set of IOMMU operations to a
given device, through its struct device.fwnode member pointer, paving
the way for representing per-device iommu_ops (ie an iommu instance
associated with a device).

Convert the DT specific of_iommu_{set/get}_ops() interface to
use struct device.fwnode as a look-up token, making the interface
usable on ACPI systems and rename the data structures and the
registration API so that they are made to represent their usage
more clearly.

Signed-off-by: Lorenzo Pieralisi <redacted>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Tomasz Nowicki <redacted>
Tested-by: Hanjun Guo <redacted>
Tested-by: Tomasz Nowicki <redacted>
Cc: Will Deacon <redacted>
Cc: Hanjun Guo <redacted>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
---
 drivers/iommu/iommu.c    | 40 ++++++++++++++++++++++++++++++++++++++++
 drivers/iommu/of_iommu.c | 39 ---------------------------------------
 include/linux/iommu.h    | 14 ++++++++++++++
 include/linux/of_iommu.h | 12 ++++++++++--
 4 files changed, 64 insertions(+), 41 deletions(-)

Acked-by: Will Deacon <redacted>

Will