summaryrefslogtreecommitdiff
path: root/include/linux/iommu.h
diff options
context:
space:
mode:
authorEric Auger <eric.auger@redhat.com>2017-01-19 23:57:48 +0300
committerWill Deacon <will.deacon@arm.com>2017-01-23 14:48:16 +0300
commitd30ddcaa7b028049cdfee3a40248002d07b2bbf3 (patch)
tree698f8d39db575c8e703c1ac41f72dd091eb59293 /include/linux/iommu.h
parente5b5234a36ca283158721d3d2e0cddfa324abdf9 (diff)
downloadlinux-d30ddcaa7b028049cdfee3a40248002d07b2bbf3.tar.xz
iommu: Add a new type field in iommu_resv_region
We introduce a new field to differentiate the reserved region types and specialize the apply_resv_region implementation. Legacy direct mapped regions have IOMMU_RESV_DIRECT type. We introduce 2 new reserved memory types: - IOMMU_RESV_MSI will characterize MSI regions that are mapped - IOMMU_RESV_RESERVED characterize regions that cannot by mapped. Signed-off-by: Eric Auger <eric.auger@redhat.com> Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com> Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r--include/linux/iommu.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index bfecb8b74078..233a6bf093bf 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -117,18 +117,25 @@ enum iommu_attr {
DOMAIN_ATTR_MAX,
};
+/* These are the possible reserved region types */
+#define IOMMU_RESV_DIRECT (1 << 0)
+#define IOMMU_RESV_RESERVED (1 << 1)
+#define IOMMU_RESV_MSI (1 << 2)
+
/**
* struct iommu_resv_region - descriptor for a reserved memory region
* @list: Linked list pointers
* @start: System physical start address of the region
* @length: Length of the region in bytes
* @prot: IOMMU Protection flags (READ/WRITE/...)
+ * @type: Type of the reserved region
*/
struct iommu_resv_region {
struct list_head list;
phys_addr_t start;
size_t length;
int prot;
+ int type;
};
#ifdef CONFIG_IOMMU_API