Change intel iommu APIs of virtual machine domain

These APIs are used by KVM to use VT-d

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 59 insertions, 70 deletions

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 8a204d5bb427..f1380269cabd 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2944,96 +2944,87 @@ static void vm_domain_exit(struct dmar_domain *domain)
         free_domain_mem(domain);
 }
 
-void intel_iommu_domain_exit(struct dmar_domain *domain)
+struct dmar_domain *intel_iommu_alloc_domain(void)
 {
-        u64 end;
-
-        /* Domain 0 is reserved, so dont process it */
-        if (!domain)
-                return;
-
-        end = DOMAIN_MAX_ADDR(domain->gaw);
-        end = end & (~VTD_PAGE_MASK);
-
-        /* clear ptes */
-        dma_pte_clear_range(domain, 0, end);
-
-        /* free page tables */
-        dma_pte_free_pagetable(domain, 0, end);
-
-        iommu_free_domain(domain);
-        free_domain_mem(domain);
-}
-EXPORT_SYMBOL_GPL(intel_iommu_domain_exit);
-
-struct dmar_domain *intel_iommu_domain_alloc(struct pci_dev *pdev)
-{
-        struct dmar_drhd_unit *drhd;
         struct dmar_domain *domain;
-        struct intel_iommu *iommu;
 
-        drhd = dmar_find_matched_drhd_unit(pdev);
-        if (!drhd) {
-                printk(KERN_ERR "intel_iommu_domain_alloc: drhd == NULL\n");
-                return NULL;
-        }
-
-        iommu = drhd->iommu;
-        if (!iommu) {
-                printk(KERN_ERR
-                        "intel_iommu_domain_alloc: iommu == NULL\n");
-                return NULL;
-        }
-        domain = iommu_alloc_domain(iommu);
+        domain = iommu_alloc_vm_domain();
         if (!domain) {
                 printk(KERN_ERR
                         "intel_iommu_domain_alloc: domain == NULL\n");
                 return NULL;
         }
-        if (domain_init(domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
+        if (vm_domain_init(domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
                 printk(KERN_ERR
                         "intel_iommu_domain_alloc: domain_init() failed\n");
-                intel_iommu_domain_exit(domain);
+                vm_domain_exit(domain);
                 return NULL;
         }
+
         return domain;
 }
-EXPORT_SYMBOL_GPL(intel_iommu_domain_alloc);
+EXPORT_SYMBOL_GPL(intel_iommu_alloc_domain);
 
-int intel_iommu_context_mapping(
-        struct dmar_domain *domain, struct pci_dev *pdev)
+void intel_iommu_free_domain(struct dmar_domain *domain)
 {
-        int rc;
-        rc = domain_context_mapping(domain, pdev);
-        return rc;
+        vm_domain_exit(domain);
 }
-EXPORT_SYMBOL_GPL(intel_iommu_context_mapping);
+EXPORT_SYMBOL_GPL(intel_iommu_free_domain);
 
-int intel_iommu_page_mapping(
-        struct dmar_domain *domain, dma_addr_t iova,
-        u64 hpa, size_t size, int prot)
+int intel_iommu_attach_device(struct dmar_domain *domain,
+                              struct pci_dev *pdev)
 {
-        int rc;
-        rc = domain_page_mapping(domain, iova, hpa, size, prot);
-        return rc;
+        int ret;
+
+        /* normally pdev is not mapped */
+        if (unlikely(domain_context_mapped(pdev))) {
+                struct dmar_domain *old_domain;
+
+                old_domain = find_domain(pdev);
+                if (old_domain) {
+                        if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE)
+                                vm_domain_remove_one_dev_info(old_domain, pdev);
+                        else
+                                domain_remove_dev_info(old_domain);
+                }
+        }
+
+        ret = domain_context_mapping(domain, pdev);
+        if (ret)
+                return ret;
+
+        ret = vm_domain_add_dev_info(domain, pdev);
+        return ret;
 }
-EXPORT_SYMBOL_GPL(intel_iommu_page_mapping);
+EXPORT_SYMBOL_GPL(intel_iommu_attach_device);
 
-void intel_iommu_detach_dev(struct dmar_domain *domain, u8 bus, u8 devfn)
+void intel_iommu_detach_device(struct dmar_domain *domain,
+                               struct pci_dev *pdev)
 {
-        struct intel_iommu *iommu;
+        vm_domain_remove_one_dev_info(domain, pdev);
+}
+EXPORT_SYMBOL_GPL(intel_iommu_detach_device);
 
-        iommu = device_to_iommu(bus, devfn);
-        iommu_detach_dev(iommu, bus, devfn);
+int intel_iommu_map_address(struct dmar_domain *domain, dma_addr_t iova,
+                            u64 hpa, size_t size, int prot)
+{
+        int ret;
+        ret = domain_page_mapping(domain, iova, hpa, size, prot);
+        return ret;
 }
-EXPORT_SYMBOL_GPL(intel_iommu_detach_dev);
+EXPORT_SYMBOL_GPL(intel_iommu_map_address);
 
-struct dmar_domain *
-intel_iommu_find_domain(struct pci_dev *pdev)
+void intel_iommu_unmap_address(struct dmar_domain *domain,
+                               dma_addr_t iova, size_t size)
 {
-        return find_domain(pdev);
+        dma_addr_t base;
+
+        /* The address might not be aligned */
+        base = iova & VTD_PAGE_MASK;
+        size = VTD_PAGE_ALIGN(size);
+        dma_pte_clear_range(domain, base, base + size);
 }
-EXPORT_SYMBOL_GPL(intel_iommu_find_domain);
+EXPORT_SYMBOL_GPL(intel_iommu_unmap_address);
 
 int intel_iommu_found(void)
 {
@@ -3041,17 +3032,15 @@ int intel_iommu_found(void)
 }
 EXPORT_SYMBOL_GPL(intel_iommu_found);
 
-u64 intel_iommu_iova_to_pfn(struct dmar_domain *domain, u64 iova)
+u64 intel_iommu_iova_to_phys(struct dmar_domain *domain, u64 iova)
 {
         struct dma_pte *pte;
-        u64 pfn;
+        u64 phys = 0;
 
-        pfn = 0;
         pte = addr_to_dma_pte(domain, iova);
-
         if (pte)
-                pfn = dma_pte_addr(pte);
+                phys = dma_pte_addr(pte);
 
-        return pfn >> VTD_PAGE_SHIFT;
+        return phys;
 }
-EXPORT_SYMBOL_GPL(intel_iommu_iova_to_pfn);
+EXPORT_SYMBOL_GPL(intel_iommu_iova_to_phys);