Added the following domain attributes for the FSL PAMU driver:
1. Added new iommu stash attribute, which allows setting of the
LIODN specific stash id parameter through IOMMU API.
2. Added an attribute for enabling/disabling DMA to a particular
memory window.
3. Added domain attribute to check for PAMUV1 specific constraints.
Signed-off-by: Varun Sethi <varun.se...@freescale.com>
---
-v12 changes:
- Moved PAMU specifc stash ids and structures to PAMU header file.
- no change in v11.
- no change in v10.
include/linux/iommu.h | 16 ++++++++++++++++
1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 2727810..c5dc2b9 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -57,10 +57,26 @@ struct iommu_domain {
#define IOMMU_CAP_CACHE_COHERENCY 0x1
#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */
+/*
+ * Following constraints are specifc to PAMUV1:
+ * -aperture must be power of 2, and naturally aligned
+ * -number of windows must be power of 2, and address space size
+ * of each window is determined by aperture size / # of windows
+ * -the actual size of the mapped region of a window must be power
+ * of 2 starting with 4KB and physical address must be naturally
+ * aligned.
+ * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
+ * The caller can invoke iommu_domain_get_attr to check if the underlying
+ * iommu implementation supports these constraints.
+ */
+
enum iommu_attr {
DOMAIN_ATTR_GEOMETRY,
DOMAIN_ATTR_PAGING,
DOMAIN_ATTR_WINDOWS,
+ DOMAIN_ATTR_PAMU_STASH,
+ DOMAIN_ATTR_PAMU_ENABLE,
+ DOMAIN_ATTR_FSL_PAMUV1,
DOMAIN_ATTR_MAX,
};
--
1.7.4.1
--
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