Re: [RFC PATCH 2/6] iommu/of: Add stall and pasid properties to iommu_fwspec

[Jean-Philippe Brucker]

On 31/08/17 09:20, Yisheng Xie wrote:
> From: Jean-Philippe Brucker 
> 
> Add stall and pasid properties to iommu_fwspec.
> 
> Signed-off-by: Jean-Philippe Brucker 

No. This is a draft, I didn't sign it off.

Thanks,
Jean
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[RFC PATCH 2/6] iommu/of: Add stall and pasid properties to iommu_fwspec

[Yisheng Xie]

From: Jean-Philippe Brucker 

Add stall and pasid properties to iommu_fwspec.

Signed-off-by: Jean-Philippe Brucker 
---
 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 intnum_ids;
+   unsigned long   num_pasid_bits;
+   boolcan_stall;
u32 ids[1];
 };
 
-- 
1.7.12.4

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