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| author | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2016-11-21 10:01:48 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-11-29 15:57:48 +0000 |
| commit | 643b8e4d86f8b1a62cf5cd9ea221e9bc0d531d18 (patch) | |
| tree | 6711969d45ce0d326661f023074db753657f472d /include/linux/acpi_iort.h | |
| parent | 618f535a60623c9e7c596b208a57bf094766b9f6 (diff) | |
| download | lwn-643b8e4d86f8b1a62cf5cd9ea221e9bc0d531d18.tar.gz lwn-643b8e4d86f8b1a62cf5cd9ea221e9bc0d531d18.zip | |
ACPI/IORT: Introduce iort_iommu_configure
DT based systems have a generic kernel API to configure IOMMUs
for devices (ie of_iommu_configure()).
On ARM based ACPI systems, the of_iommu_configure() equivalent can
be implemented atop ACPI IORT kernel API, with the corresponding
functions to map device identifiers to IOMMUs and retrieve the
corresponding IOMMU operations necessary for DMA operations set-up.
By relying on the iommu_fwspec generic kernel infrastructure,
implement the IORT based IOMMU configuration for ARM ACPI systems
and hook it up in the ACPI kernel layer that implements DMA
configuration for a device.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [ACPI core]
Reviewed-by: Tomasz Nowicki <tn@semihalf.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Tested-by: Tomasz Nowicki <tn@semihalf.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Tomasz Nowicki <tn@semihalf.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/acpi_iort.h')
| -rw-r--r-- | include/linux/acpi_iort.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 79ba1bb50950..dcb2b601e152 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -34,6 +34,8 @@ void acpi_iort_init(void); bool iort_node_match(u8 type); u32 iort_msi_map_rid(struct device *dev, u32 req_id); struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id); +/* IOMMU interface */ +const struct iommu_ops *iort_iommu_configure(struct device *dev); #else static inline void acpi_iort_init(void) { } static inline bool iort_node_match(u8 type) { return false; } @@ -42,6 +44,10 @@ static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id) static inline struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id) { return NULL; } +/* IOMMU interface */ +static inline +const struct iommu_ops *iort_iommu_configure(struct device *dev) +{ return NULL; } #endif #define IORT_ACPI_DECLARE(name, table_id, fn) \ |