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ACPI/IORT: Fix CONFIG_IOMMU_API dependency 

The IOMMU probe deferral IORT rework had to add code in
iort_iommu_configure() and iort_iommu_xlate() that requires
the IOMMU_API to be selected in order to compile and work.

Stub out the pieces of code that depend on CONFIG_IOMMU_API
to be selected to prevent compilation failures such as:

drivers/acpi/arm64/iort.c: In function 'iort_iommu_xlate':
drivers/acpi/arm64/iort.c:647:22: error: 'struct iommu_fwspec' has no
member named 'ops'

by wrapping the code in static inline functions that provide a NOP
implementation when CONFIG_IOMMU_API is not selected.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lorenzo Pieralisi 2017-04-28 16:59:49 +01:00 committed by Joerg Roedel
parent 316ca8804e
commit d49f2dedf3
1 changed files with 34 additions and 10 deletions
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44
drivers/acpi/arm64/iort.c
View File

@ -536,6 +536,33 @@ static inline bool iort_iommu_driver_enabled(u8 type)
}
}
#ifdef CONFIG_IOMMU_API
static inline
const struct iommu_ops *iort_fwspec_iommu_ops(struct iommu_fwspec *fwspec)
{
return (fwspec && fwspec->ops) ? fwspec->ops : NULL;
}
static inline
int iort_add_device_replay(const struct iommu_ops *ops, struct device *dev)
{
int err = 0;
if (!IS_ERR_OR_NULL(ops) && ops->add_device && dev->bus &&
!dev->iommu_group)
err = ops->add_device(dev);
return err;
}
#else
static inline
const struct iommu_ops *iort_fwspec_iommu_ops(struct iommu_fwspec *fwspec)
{ return NULL; }
static inline
int iort_add_device_replay(const struct iommu_ops *ops, struct device *dev)
{ return 0; }
#endif
static const struct iommu_ops *iort_iommu_xlate(struct device *dev,
struct acpi_iort_node *node,
u32 streamid)
@ -543,14 +570,14 @@ static const struct iommu_ops *iort_iommu_xlate(struct device *dev,
const struct iommu_ops *ops = NULL;
int ret = -ENODEV;
struct fwnode_handle *iort_fwnode;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
/*
* If we already translated the fwspec there
* is nothing left to do, return the iommu_ops.
*/
if (fwspec && fwspec->ops)
return fwspec->ops;
ops = iort_fwspec_iommu_ops(dev->iommu_fwspec);
if (ops)
return ops;
if (node) {
iort_fwnode = iort_get_fwnode(node);
@ -611,6 +638,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
struct acpi_iort_node *node, *parent;
const struct iommu_ops *ops = NULL;
u32 streamid = 0;
int err;
if (dev_is_pci(dev)) {
struct pci_bus *bus = to_pci_dev(dev)->bus;
@ -654,13 +682,9 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
* If we have reason to believe the IOMMU driver missed the initial
* add_device callback for dev, replay it to get things in order.
*/
if (!IS_ERR_OR_NULL(ops) && ops->add_device &&
dev->bus && !dev->iommu_group) {
int err = ops->add_device(dev);
if (err)
ops = ERR_PTR(err);
}
err = iort_add_device_replay(ops, dev);
if (err)
ops = ERR_PTR(err);
return ops;
}