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author | Varun Sethi <Varun.Sethi@freescale.com> | 2013-07-15 10:20:56 +0530 |
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committer | Joerg Roedel <joro@8bytes.org> | 2013-08-14 11:38:34 +0200 |
commit | 7cabf491eb6d52ea7f166b287702890cae0c803d (patch) | |
tree | 30842eae9e0e2f77e02ba0ead4d2c705e081cd4a /include/linux/iommu.h | |
parent | bb9175051aedb33dcf44741c6f145107ab132a87 (diff) | |
download | op-kernel-dev-7cabf491eb6d52ea7f166b287702890cae0c803d.zip op-kernel-dev-7cabf491eb6d52ea7f166b287702890cae0c803d.tar.gz |
iommu/fsl: Add additional iommu attributes required by the PAMU driver.
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.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r-- | 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 3aeb730..7ea319e 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -58,10 +58,26 @@ struct iommu_domain { #define IOMMU_CAP_CACHE_COHERENCY 0x1 #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ +/* + * Following constraints are specifc to FSL_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_FSL_PAMU_STASH, + DOMAIN_ATTR_FSL_PAMU_ENABLE, + DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_MAX, }; |