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| author |   Jean-Philippe Brucker <jean-philippe.brucker@arm.com> | 2019-04-17 19:24:42 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2019-04-23 12:23:03 +0100 |
| commit | 5702ee24182f9b3e33476b74b5c92a4f913ad9bd (patch) | |
| tree | 0a12593d1c1fa1979364e43bba53bc383a298840 /include/linux/iommu.h | |
| parent | PCI: Add a stub for pci_ats_disabled() (diff) | |
| download | wireguard-linux-5702ee24182f9b3e33476b74b5c92a4f913ad9bd.tar.xz wireguard-linux-5702ee24182f9b3e33476b74b5c92a4f913ad9bd.zip | |
ACPI/IORT: Check ATS capability in root complex nodes
Root complex node in IORT has a bit telling whether it supports ATS or
not. Store this bit in the IOMMU fwspec when setting up a device, so it
can be accessed later by an IOMMU driver. In the future we'll probably
want to store this bit at the host bridge or SMMU rather than in each
endpoint.
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index ffbbc7e39cee..6c1b4c900191 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -392,10 +392,14 @@ struct iommu_fwspec { const struct iommu_ops *ops; struct fwnode_handle *iommu_fwnode; void *iommu_priv; + u32 flags; unsigned int num_ids; u32 ids[1]; }; +/* ATS is supported */ +#define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0) + int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, const struct iommu_ops *ops); void iommu_fwspec_free(struct device *dev); |