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authorRobin Murphy <robin.murphy@arm.com>2015-01-12 17:51:14 +0000
committerJoerg Roedel <jroedel@suse.de>2015-01-19 14:55:22 +0100
commit85b4545629663486b7f71047ce3b54fa0ad3eb28 (patch)
tree00c5840d2ca44a0e5c75aa54e05e866d1f28d612 /drivers/iommu/iova.c
parent114150d8f4fc9e7a003be2bdb0efd31796d241ff (diff)
downloadop-kernel-dev-85b4545629663486b7f71047ce3b54fa0ad3eb28.zip
op-kernel-dev-85b4545629663486b7f71047ce3b54fa0ad3eb28.tar.gz
iommu: Consolidate IOVA allocator code
In order to share the IOVA allocator with other architectures, break the unnecssary dependency on the Intel IOMMU driver and move the remaining IOVA internals to iova.c Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iova.c')
-rw-r--r--drivers/iommu/iova.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index f6b17e6..520b8c8 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -18,6 +18,41 @@
*/
#include <linux/iova.h>
+#include <linux/slab.h>
+
+static struct kmem_cache *iommu_iova_cache;
+
+int iommu_iova_cache_init(void)
+{
+ int ret = 0;
+
+ iommu_iova_cache = kmem_cache_create("iommu_iova",
+ sizeof(struct iova),
+ 0,
+ SLAB_HWCACHE_ALIGN,
+ NULL);
+ if (!iommu_iova_cache) {
+ pr_err("Couldn't create iova cache\n");
+ ret = -ENOMEM;
+ }
+
+ return ret;
+}
+
+void iommu_iova_cache_destroy(void)
+{
+ kmem_cache_destroy(iommu_iova_cache);
+}
+
+struct iova *alloc_iova_mem(void)
+{
+ return kmem_cache_alloc(iommu_iova_cache, GFP_ATOMIC);
+}
+
+void free_iova_mem(struct iova *iova)
+{
+ kmem_cache_free(iommu_iova_cache, iova);
+}
void
init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit)
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