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AMD IOMMU: add domain init function for IOMMU API

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Impact: add a generic function for allocation protection domains

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-02 18:13:27 +01:00
parent 6d98cd8043
commit c156e347d6
1 changed files with 30 additions and 0 deletions
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30
arch/x86/kernel/amd_iommu.c
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@ -22,6 +22,9 @@
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/iommu-helper.h> #include <linux/iommu-helper.h>
#ifdef CONFIG_IOMMU_API
#include <linux/iommu.h>
#endif
#include <asm/proto.h> #include <asm/proto.h>
#include <asm/iommu.h> #include <asm/iommu.h>
#include <asm/gart.h> #include <asm/gart.h>
@ -1606,4 +1609,31 @@ static void cleanup_domain(struct protection_domain *domain)
write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
} }
static int amd_iommu_domain_init(struct iommu_domain *dom)
{
struct protection_domain *domain;
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
if (!domain)
return -ENOMEM;
spin_lock_init(&domain->lock);
domain->mode = PAGE_MODE_3_LEVEL;
domain->id = domain_id_alloc();
if (!domain->id)
goto out_free;
domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL);
if (!domain->pt_root)
goto out_free;
dom->priv = domain;
return 0;
out_free:
kfree(domain);
return -ENOMEM;
}
#endif #endif