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iommu: Consolidate IOVA allocator code

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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>
This commit is contained in:
Robin Murphy 2015-01-12 17:51:14 +00:00 committed by Joerg Roedel
parent 114150d8f4
commit 85b4545629
3 changed files with 40 additions and 31 deletions
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33
drivers/iommu/intel-iommu.c
View File

@ -485,7 +485,6 @@ __setup("intel_iommu=", intel_iommu_setup);
static struct kmem_cache *iommu_domain_cache;
static struct kmem_cache *iommu_devinfo_cache;
static struct kmem_cache *iommu_iova_cache;
static inline void *alloc_pgtable_page(int node)
{
@ -523,16 +522,6 @@ static inline void free_devinfo_mem(void *vaddr)
kmem_cache_free(iommu_devinfo_cache, vaddr);
}
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);
}
static inline int domain_type_is_vm(struct dmar_domain *domain)
{
return domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE;
@ -3427,23 +3416,6 @@ static inline int iommu_devinfo_cache_init(void)
return ret;
}
static inline 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) {
printk(KERN_ERR "Couldn't create iova cache\n");
ret = -ENOMEM;
}
return ret;
}
static int __init iommu_init_mempool(void)
{
int ret;
@ -3461,7 +3433,7 @@ static int __init iommu_init_mempool(void)
kmem_cache_destroy(iommu_domain_cache);
domain_error:
kmem_cache_destroy(iommu_iova_cache);
iommu_iova_cache_destroy();
return -ENOMEM;
}
@ -3470,8 +3442,7 @@ static void __init iommu_exit_mempool(void)
{
kmem_cache_destroy(iommu_devinfo_cache);
kmem_cache_destroy(iommu_domain_cache);
kmem_cache_destroy(iommu_iova_cache);
iommu_iova_cache_destroy();
}
static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev)

35
drivers/iommu/iova.c
View File

@ -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)

3
include/linux/iova.h
View File

@ -39,6 +39,9 @@ static inline unsigned long iova_size(struct iova *iova)
return iova->pfn_hi - iova->pfn_lo + 1;
}
int iommu_iova_cache_init(void);
void iommu_iova_cache_destroy(void);
struct iova *alloc_iova_mem(void);
void free_iova_mem(struct iova *iova);
void free_iova(struct iova_domain *iovad, unsigned long pfn);