[RFC PATCH 2/6] iommu/of: Add stall and pasid properties to iommu_fwspec
From: Yisheng Xie <hidden>
Date: 2017-08-31 08:30:25
Also in:
linux-acpi, linux-devicetree, linux-iommu, lkml
Subsystem:
iommu subsystem, the rest · Maintainers:
Joerg Roedel, Will Deacon, Linus Torvalds
From: Jean-Philippe Brucker <redacted> Add stall and pasid properties to iommu_fwspec. Signed-off-by: Jean-Philippe Brucker <redacted> --- drivers/iommu/of_iommu.c | 11 +++++++++++ include/linux/iommu.h | 2 ++ 2 files changed, 12 insertions(+)
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 84fa6b4..b926276 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c@@ -209,6 +209,16 @@ static bool of_pci_rc_supports_ats(struct device_node *rc_node) break; } + if (dev->iommu_fwspec) { + const __be32 *prop; + + if (of_get_property(np, "dma-can-stall", NULL)) + dev->iommu_fwspec->can_stall = true; + + prop = of_get_property(np, "pasid-bits", NULL); + if (prop) + dev->iommu_fwspec->num_pasid_bits = be32_to_cpu(*prop); + } + return ops; }
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 1c5a216..5f580de 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h@@ -387,6 +387,8 @@ struct iommu_fwspec { void *iommu_priv; u32 flags; unsigned int num_ids; + unsigned long num_pasid_bits; + bool can_stall; u32 ids[1]; };
--
1.7.12.4