Re: [PATCH 2/3 v3] iommu/fsl: Add iommu domain attributes required by fsl PAMU driver.

Added the following domain attributes required by FSL PAMU driver:
1. Subwindows field added to the iommu domain geometry attribute.
2. Added new iommu stash attribute, which allows setting of the
   LIODN specific stash id parameter through IOMMU API.
3. Added an attribute for enabling/disabling DMA to a particular
   memory window.
=20
Signed-off-by: Varun Sethi <redacted>
---
change in v3:
-renamed the stash attribute targets
=20
 include/linux/iommu.h |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)
=20

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index f3b99e1..c3b9d73 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h

@@ -44,6 +44,33 @@ struct iommu_domain_geometry {
 	dma_addr_t aperture_start; /* First address that can be =20

mapped    */
 	dma_addr_t aperture_end;   /* Last address that can be =20
mapped     */
 	bool force_aperture;       /* DMA only allowed in mappable =20
range? */
+
+	/* The subwindows field indicates number of DMA subwindows =20
supported
+	 * by the geometry. Following is the interpretation of
+	 * values for this field:
+	 * 0 : This implies that the supported geometry size is 1 MB
+         * with each subwindow size being 4KB. Thus number of =20
subwindows

@@ -60,6 +87,14 @@ struct iommu_domain {
 enum iommu_attr {
 	DOMAIN_ATTR_MAX,
 	DOMAIN_ATTR_GEOMETRY,
+	/* Set the IOMMU hardware stashing
+	 * parameters.
+	 */
+	DOMAIN_ATTR_STASH,
+	/* Explicity enable/disable DMA for a
+         * particular memory window.
+         */
+	DOMAIN_ATTR_ENABLE,
 };