This is necessary to store a pointer to the bus-specific
iommu_ops in the iommu-domain structure. It will be used
later to call into bus-specific iommu-ops.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This is the starting point to make the iommu_ops used for
the iommu-api a per-bus-type structure. It is required to
easily implement bus-specific setup in the iommu-layer.
The first user will be the iommu-group attribute in sysfs.
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This makes it impossible to compile an iommu driver into the
kernel without selecting CONFIG_IOMMU_API.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

If CONFIG_IOMMU_API is not defined some functions will just
return -ENODEV. Add errno.h for the definition of ENODEV.
Signed-off-by: NLaura Abbott <lauraa@codeaurora.org>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This patch allows IOMMU users to determine whether the
hardware and software support safe, isolated interrupt
remapping.  Not all Intel IOMMUs have the hardware, and the
software for AMD is not there yet.
Signed-off-by: NTom Lyon <pugs@cisco.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

These functions are not longer used and can be removed
savely. There functionality is now provided by the
iommu_{un}map functions which are also capable of multiple
page sizes.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This patch adds new callbacks for mapping and unmapping
pages to the iommu_ops structure. These callbacks are aware
of page sizes which makes them different to the
->{un}map_range callbacks.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

These two functions provide support for mapping and
unmapping physical addresses to io virtual addresses. The
difference to the iommu_(un)map_range() is that the new
functions take a gfp_order parameter instead of a size. This
allows the IOMMU backend implementations to detect easier if
a given range can be mapped by larger page sizes.
These new functions should replace the old ones in the long
term.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The new function pointer names match better with the
top-level functions of the iommu-api which are using them.
Main intention of this change is to make the ->{un}map
pointer names free for two new mapping functions.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The user can request to enable snooping control through VT-d page table.
Signed-off-by: NSheng Yang <sheng@linux.intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This iommu_op can tell if domain have a specific capability, like snooping
control for Intel IOMMU, which can be used by other components of kernel to
adjust the behaviour.
Signed-off-by: NSheng Yang <sheng@linux.intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This patch introduces the API to abstract the exported VT-d functions
for KVM into a generic API. This way the AMD IOMMU implementation can
plug into this API later.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>