Add stall and pasid properties to iommu_fwspec, and fill them when dma-can-stall and pasid-bits properties are present in the device tree.
Signed-off-by: Jean-Philippe Brucker <[email protected]> --- drivers/iommu/of_iommu.c | 12 ++++++++++++ include/linux/iommu.h | 2 ++ 2 files changed, 14 insertions(+) diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 5c36a8b7656a..9b6b55f3cccd 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -204,6 +204,18 @@ const struct iommu_ops *of_iommu_configure(struct device *dev, if (err) break; } + + fwspec = dev->iommu_fwspec; + if (!err && fwspec) { + const __be32 *prop; + + if (of_get_property(master_np, "dma-can-stall", NULL)) + fwspec->can_stall = true; + + prop = of_get_property(master_np, "pasid-num-bits", NULL); + if (prop) + fwspec->num_pasid_bits = be32_to_cpu(*prop); + } } /* diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 933100678f64..bcce44455117 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -656,6 +656,8 @@ struct iommu_fwspec { struct fwnode_handle *iommu_fwnode; void *iommu_priv; unsigned int num_ids; + unsigned int num_pasid_bits; + bool can_stall; u32 ids[1]; }; -- 2.17.0 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
