Commit 162d1b10 authored by Jiang Liu's avatar Jiang Liu Committed by Joerg Roedel

iommu/vt-d: Introduce helper domain_pfn_within_range() to simplify code

Introduce helper function domain_pfn_within_range() to simplify code
and improve readability.
Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent d41a4adb
...@@ -549,6 +549,14 @@ static inline int domain_type_is_vm_or_si(struct dmar_domain *domain) ...@@ -549,6 +549,14 @@ static inline int domain_type_is_vm_or_si(struct dmar_domain *domain)
DOMAIN_FLAG_STATIC_IDENTITY); DOMAIN_FLAG_STATIC_IDENTITY);
} }
static inline int domain_pfn_supported(struct dmar_domain *domain,
unsigned long pfn)
{
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
return !(addr_width < BITS_PER_LONG && pfn >> addr_width);
}
static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw)
{ {
unsigned long sagaw; unsigned long sagaw;
...@@ -822,14 +830,13 @@ static void free_context_table(struct intel_iommu *iommu) ...@@ -822,14 +830,13 @@ static void free_context_table(struct intel_iommu *iommu)
static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
unsigned long pfn, int *target_level) unsigned long pfn, int *target_level)
{ {
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
struct dma_pte *parent, *pte = NULL; struct dma_pte *parent, *pte = NULL;
int level = agaw_to_level(domain->agaw); int level = agaw_to_level(domain->agaw);
int offset; int offset;
BUG_ON(!domain->pgd); BUG_ON(!domain->pgd);
if (addr_width < BITS_PER_LONG && pfn >> addr_width) if (!domain_pfn_supported(domain, pfn))
/* Address beyond IOMMU's addressing capabilities. */ /* Address beyond IOMMU's addressing capabilities. */
return NULL; return NULL;
...@@ -912,12 +919,11 @@ static void dma_pte_clear_range(struct dmar_domain *domain, ...@@ -912,12 +919,11 @@ static void dma_pte_clear_range(struct dmar_domain *domain,
unsigned long start_pfn, unsigned long start_pfn,
unsigned long last_pfn) unsigned long last_pfn)
{ {
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
unsigned int large_page = 1; unsigned int large_page = 1;
struct dma_pte *first_pte, *pte; struct dma_pte *first_pte, *pte;
BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); BUG_ON(!domain_pfn_supported(domain, start_pfn));
BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); BUG_ON(!domain_pfn_supported(domain, last_pfn));
BUG_ON(start_pfn > last_pfn); BUG_ON(start_pfn > last_pfn);
/* we don't need lock here; nobody else touches the iova range */ /* we don't need lock here; nobody else touches the iova range */
...@@ -978,10 +984,8 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain, ...@@ -978,10 +984,8 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain,
unsigned long start_pfn, unsigned long start_pfn,
unsigned long last_pfn) unsigned long last_pfn)
{ {
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; BUG_ON(!domain_pfn_supported(domain, start_pfn));
BUG_ON(!domain_pfn_supported(domain, last_pfn));
BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width);
BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width);
BUG_ON(start_pfn > last_pfn); BUG_ON(start_pfn > last_pfn);
dma_pte_clear_range(domain, start_pfn, last_pfn); dma_pte_clear_range(domain, start_pfn, last_pfn);
...@@ -1083,11 +1087,10 @@ struct page *domain_unmap(struct dmar_domain *domain, ...@@ -1083,11 +1087,10 @@ struct page *domain_unmap(struct dmar_domain *domain,
unsigned long start_pfn, unsigned long start_pfn,
unsigned long last_pfn) unsigned long last_pfn)
{ {
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
struct page *freelist = NULL; struct page *freelist = NULL;
BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); BUG_ON(!domain_pfn_supported(domain, start_pfn));
BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); BUG_ON(!domain_pfn_supported(domain, last_pfn));
BUG_ON(start_pfn > last_pfn); BUG_ON(start_pfn > last_pfn);
/* we don't need lock here; nobody else touches the iova range */ /* we don't need lock here; nobody else touches the iova range */
...@@ -1974,12 +1977,11 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, ...@@ -1974,12 +1977,11 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
{ {
struct dma_pte *first_pte = NULL, *pte = NULL; struct dma_pte *first_pte = NULL, *pte = NULL;
phys_addr_t uninitialized_var(pteval); phys_addr_t uninitialized_var(pteval);
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
unsigned long sg_res; unsigned long sg_res;
unsigned int largepage_lvl = 0; unsigned int largepage_lvl = 0;
unsigned long lvl_pages = 0; unsigned long lvl_pages = 0;
BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); BUG_ON(!domain_pfn_supported(domain, iov_pfn + nr_pages - 1));
if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0)
return -EINVAL; return -EINVAL;
......
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