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author | Robin Murphy <robin.murphy@arm.com> | 2015-01-12 17:51:14 +0000 |
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committer | Joerg Roedel <jroedel@suse.de> | 2015-01-19 14:55:22 +0100 |
commit | 85b4545629663486b7f71047ce3b54fa0ad3eb28 (patch) | |
tree | 00c5840d2ca44a0e5c75aa54e05e866d1f28d612 /drivers/iommu/iova.c | |
parent | 114150d8f4fc9e7a003be2bdb0efd31796d241ff (diff) | |
download | linux-stable-85b4545629663486b7f71047ce3b54fa0ad3eb28.tar.gz linux-stable-85b4545629663486b7f71047ce3b54fa0ad3eb28.tar.bz2 linux-stable-85b4545629663486b7f71047ce3b54fa0ad3eb28.zip |
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.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index f6b17e6af2fb..520b8c8ae0c4 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) |