diff mbox

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

Message ID 1504167642-14922-3-git-send-email-xieyisheng1@huawei.com (mailing list archive)
State New, archived
Headers show

Commit Message

Xie Yisheng Aug. 31, 2017, 8:20 a.m. UTC 
From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>

Add stall and pasid properties to iommu_fwspec.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
---
 drivers/iommu/of_iommu.c | 11 +++++++++++
 include/linux/iommu.h    |  2 ++
 2 files changed, 12 insertions(+)

Comments

Jean-Philippe Brucker Sept. 5, 2017, 12:52 p.m. UTC | #1 
On 31/08/17 09:20, Yisheng Xie wrote:
> From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
> 
> Add stall and pasid properties to iommu_fwspec.
> 
> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>

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

Thanks,
Jean
diff mbox

Patch

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];
 };