Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

x86/amd-iommu: Make alloc_new_range aware of multiple IOMMUs

Browse source 
Since the assumption that an dma_ops domain is only bound to
one IOMMU was given up we need to make alloc_new_range aware
of it.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-11-23 19:08:46 +01:00
parent 680525e06d
commit 576175c250
1 changed files with 15 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

27
arch/x86/kernel/amd_iommu.c
View file

@ -788,11 +788,11 @@ static u64 *fetch_pte(struct protection_domain *domain,
* aperture in case of dma_ops domain allocation or address allocation
* failure.
*/
static int alloc_new_range(struct amd_iommu *iommu,
struct dma_ops_domain *dma_dom,
static int alloc_new_range(struct dma_ops_domain *dma_dom,
bool populate, gfp_t gfp)
{
int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
struct amd_iommu *iommu;
int i;
#ifdef CONFIG_IOMMU_STRESS
@ -832,14 +832,17 @@ static int alloc_new_range(struct amd_iommu *iommu,
dma_dom->aperture_size += APERTURE_RANGE_SIZE;
/* Intialize the exclusion range if necessary */
if (iommu->exclusion_start &&
iommu->exclusion_start >= dma_dom->aperture[index]->offset &&
iommu->exclusion_start < dma_dom->aperture_size) {
unsigned long startpage = iommu->exclusion_start >> PAGE_SHIFT;
int pages = iommu_num_pages(iommu->exclusion_start,
iommu->exclusion_length,
PAGE_SIZE);
dma_ops_reserve_addresses(dma_dom, startpage, pages);
for_each_iommu(iommu) {
if (iommu->exclusion_start &&
iommu->exclusion_start >= dma_dom->aperture[index]->offset
&& iommu->exclusion_start < dma_dom->aperture_size) {
unsigned long startpage;
int pages = iommu_num_pages(iommu->exclusion_start,
iommu->exclusion_length,
PAGE_SIZE);
startpage = iommu->exclusion_start >> PAGE_SHIFT;
dma_ops_reserve_addresses(dma_dom, startpage, pages);
}
}
/*
@ -1143,7 +1146,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu)
add_domain_to_list(&dma_dom->domain);
if (alloc_new_range(iommu, dma_dom, true, GFP_KERNEL))
if (alloc_new_range(dma_dom, true, GFP_KERNEL))
goto free_dma_dom;
/*
@ -1686,7 +1689,7 @@ static dma_addr_t __map_single(struct device *dev,
*/
dma_dom->next_address = dma_dom->aperture_size;
if (alloc_new_range(iommu, dma_dom, false, GFP_ATOMIC))
if (alloc_new_range(dma_dom, false, GFP_ATOMIC))
goto out;
/*