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authorJoerg Roedel <joerg.roedel@amd.com>2010-01-15 14:41:15 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2010-03-07 18:01:11 +0100
commitcbb9d729f3433c9c2660b01dc52e6deb89488886 (patch)
treee0384945ce9d235d5d3ae4e151728ce3faeb2cdf /arch/x86/kernel/amd_iommu.c
parentfcd95807fb61e67d602610e7ff7129ed769e9fee (diff)
x86/amd-iommu: Make iommu_map_page and alloc_pte aware of page sizes
This patch changes the old map_size parameter of alloc_pte to a page_size parameter which can be used more easily to alloc a pte for intermediate page sizes. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
-rw-r--r--arch/x86/kernel/amd_iommu.c53
1 files changed, 33 insertions, 20 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 59cae7c4df54..41700314f3e0 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -730,18 +730,22 @@ static bool increase_address_space(struct protection_domain *domain,
static u64 *alloc_pte(struct protection_domain *domain,
unsigned long address,
- int end_lvl,
+ unsigned long page_size,
u64 **pte_page,
gfp_t gfp)
{
+ int level, end_lvl;
u64 *pte, *page;
- int level;
+
+ BUG_ON(!is_power_of_2(page_size));
while (address > PM_LEVEL_SIZE(domain->mode))
increase_address_space(domain, gfp);
- level = domain->mode - 1;
- pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)];
+ level = domain->mode - 1;
+ pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)];
+ address = PAGE_SIZE_ALIGN(address, page_size);
+ end_lvl = PAGE_SIZE_LEVEL(page_size);
while (level > end_lvl) {
if (!IOMMU_PTE_PRESENT(*pte)) {
@@ -751,6 +755,10 @@ static u64 *alloc_pte(struct protection_domain *domain,
*pte = PM_LEVEL_PDE(level, virt_to_phys(page));
}
+ /* No level skipping support yet */
+ if (PM_PTE_LEVEL(*pte) != level)
+ return NULL;
+
level -= 1;
pte = IOMMU_PTE_PAGE(*pte);
@@ -806,31 +814,36 @@ static int iommu_map_page(struct protection_domain *dom,
unsigned long bus_addr,
unsigned long phys_addr,
int prot,
- int map_size)
+ unsigned long page_size)
{
u64 __pte, *pte;
-
- bus_addr = PAGE_ALIGN(bus_addr);
- phys_addr = PAGE_ALIGN(phys_addr);
-
- BUG_ON(!PM_ALIGNED(map_size, bus_addr));
- BUG_ON(!PM_ALIGNED(map_size, phys_addr));
+ int i, count;
if (!(prot & IOMMU_PROT_MASK))
return -EINVAL;
- pte = alloc_pte(dom, bus_addr, map_size, NULL, GFP_KERNEL);
+ bus_addr = PAGE_ALIGN(bus_addr);
+ phys_addr = PAGE_ALIGN(phys_addr);
+ count = PAGE_SIZE_PTE_COUNT(page_size);
+ pte = alloc_pte(dom, bus_addr, page_size, NULL, GFP_KERNEL);
+
+ for (i = 0; i < count; ++i)
+ if (IOMMU_PTE_PRESENT(pte[i]))
+ return -EBUSY;
- if (IOMMU_PTE_PRESENT(*pte))
- return -EBUSY;
+ if (page_size > PAGE_SIZE) {
+ __pte = PAGE_SIZE_PTE(phys_addr, page_size);
+ __pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_P | IOMMU_PTE_FC;
+ } else
+ __pte = phys_addr | IOMMU_PTE_P | IOMMU_PTE_FC;
- __pte = phys_addr | IOMMU_PTE_P;
if (prot & IOMMU_PROT_IR)
__pte |= IOMMU_PTE_IR;
if (prot & IOMMU_PROT_IW)
__pte |= IOMMU_PTE_IW;
- *pte = __pte;
+ for (i = 0; i < count; ++i)
+ pte[i] = __pte;
update_domain(dom);
@@ -877,7 +890,7 @@ static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
for (addr = e->address_start; addr < e->address_end;
addr += PAGE_SIZE) {
ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot,
- PM_MAP_4k);
+ PAGE_SIZE);
if (ret)
return ret;
/*
@@ -1005,7 +1018,7 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom,
u64 *pte, *pte_page;
for (i = 0; i < num_ptes; ++i) {
- pte = alloc_pte(&dma_dom->domain, address, PM_MAP_4k,
+ pte = alloc_pte(&dma_dom->domain, address, PAGE_SIZE,
&pte_page, gfp);
if (!pte)
goto out_free;
@@ -1711,7 +1724,7 @@ static u64* dma_ops_get_pte(struct dma_ops_domain *dom,
pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)];
if (!pte) {
- pte = alloc_pte(&dom->domain, address, PM_MAP_4k, &pte_page,
+ pte = alloc_pte(&dom->domain, address, PAGE_SIZE, &pte_page,
GFP_ATOMIC);
aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page;
} else
@@ -2457,7 +2470,7 @@ static int amd_iommu_map_range(struct iommu_domain *dom,
paddr &= PAGE_MASK;
for (i = 0; i < npages; ++i) {
- ret = iommu_map_page(domain, iova, paddr, prot, PM_MAP_4k);
+ ret = iommu_map_page(domain, iova, paddr, prot, PAGE_SIZE);
if (ret)
return ret;