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iommu/vt-d: Add access functions for iommu->domains 

This makes it easier to change the layout of the data
structure later.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-07-21 10:00:56 +02:00
parent c0e8a6c803
commit 9452d5bfe5
1 changed files with 17 additions and 5 deletions
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22
drivers/iommu/intel-iommu.c
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@ -569,6 +569,17 @@ __setup("intel_iommu=", intel_iommu_setup);
static struct kmem_cache *iommu_domain_cache;
static struct kmem_cache *iommu_devinfo_cache;
static struct dmar_domain* get_iommu_domain(struct intel_iommu *iommu, u16 did)
{
return iommu->domains[did];
}
static void set_iommu_domain(struct intel_iommu *iommu, u16 did,
struct dmar_domain *domain)
{
iommu->domains[did] = domain;
}
static inline void *alloc_pgtable_page(int node)
{
struct page *page;
@ -1463,7 +1474,8 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did,
* flush. However, device IOTLB doesn't need to be flushed in this case.
*/
if (!cap_caching_mode(iommu->cap) || !map)
iommu_flush_dev_iotlb(iommu->domains[did], addr, mask);
iommu_flush_dev_iotlb(get_iommu_domain(iommu, did),
addr, mask);
}
static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu)
@ -1573,7 +1585,7 @@ static void disable_dmar_iommu(struct intel_iommu *iommu)
if (i == 0)
continue;
domain = iommu->domains[i];
domain = get_iommu_domain(iommu, i);
clear_bit(i, iommu->domain_ids);
if (domain_detach_iommu(domain, iommu) == 0 &&
!domain_type_is_vm(domain))
@ -1631,7 +1643,7 @@ static int __iommu_attach_domain(struct dmar_domain *domain,
num = find_first_zero_bit(iommu->domain_ids, ndomains);
if (num < ndomains) {
set_bit(num, iommu->domain_ids);
iommu->domains[num] = domain;
set_iommu_domain(iommu, num, domain);
domain->iommu_did[iommu->seq_id] = num;
} else {
num = -ENOSPC;
@ -1681,7 +1693,7 @@ static void iommu_detach_domain(struct dmar_domain *domain,
return;
clear_bit(num, iommu->domain_ids);
iommu->domains[num] = NULL;
set_iommu_domain(iommu, num, NULL);
spin_unlock_irqrestore(&iommu->lock, flags);
}
@ -4852,7 +4864,7 @@ static size_t intel_iommu_unmap(struct iommu_domain *domain,
*/
ndomains = cap_ndoms(iommu->cap);
for_each_set_bit(num, iommu->domain_ids, ndomains) {
if (iommu->domains[num] == dmar_domain)
if (get_iommu_domain(iommu, num) == dmar_domain)
iommu_flush_iotlb_psi(iommu, num, start_pfn,
npages, !freelist, 0);
}