From a505798efc9c0c67974e6b3c0bbd7ee8b0d65784 Mon Sep 17 00:00:00 2001 From: Weidong Han Date: Tue, 2 Dec 2008 20:18:15 +0800 Subject: [PATCH] change intel iommu APIs These APIs will be used by kvm VT-d. The domain used by these APIs is virtual machine domain (domain flag is DOMAIN_FLAG_VIRTUAL_MACHINE). Signed-off-by: Weidong Han --- drivers/pci/intel-iommu.c | 128 ++++++++++++++++++++----------------------- include/linux/intel-iommu.h | 20 ++++--- 2 files changed, 71 insertions(+), 77 deletions(-) diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 3f987d7..0db77e2 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -2645,93 +2645,87 @@ 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) { - iommu_detach_dev(bus, devfn); + vm_domain_remove_one_dev_info(domain, pdev); } -EXPORT_SYMBOL_GPL(intel_iommu_detach_dev); +EXPORT_SYMBOL_GPL(intel_iommu_detach_device); -struct dmar_domain * -intel_iommu_find_domain(struct pci_dev *pdev) +int intel_iommu_map_address(struct dmar_domain *domain, dma_addr_t iova, + u64 hpa, size_t size, int prot) { - return find_domain(pdev); + int ret; + ret = domain_page_mapping(domain, iova, hpa, size, prot); + return ret; } -EXPORT_SYMBOL_GPL(intel_iommu_find_domain); +EXPORT_SYMBOL_GPL(intel_iommu_map_address); + +void intel_iommu_unmap_address(struct dmar_domain *domain, + dma_addr_t iova, size_t size) +{ + 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_unmap_address); int intel_iommu_found(void) { @@ -2739,17 +2733,15 @@ 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); diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 24a2945..39a68b3 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -335,15 +335,17 @@ extern int qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr, extern void qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu); -void intel_iommu_domain_exit(struct dmar_domain *domain); -struct dmar_domain *intel_iommu_domain_alloc(struct pci_dev *pdev); -int intel_iommu_context_mapping(struct dmar_domain *domain, - struct pci_dev *pdev); -int intel_iommu_page_mapping(struct dmar_domain *domain, dma_addr_t iova, - u64 hpa, size_t size, int prot); -void intel_iommu_detach_dev(struct dmar_domain *domain, u8 bus, u8 devfn); -struct dmar_domain *intel_iommu_find_domain(struct pci_dev *pdev); -u64 intel_iommu_iova_to_pfn(struct dmar_domain *domain, u64 iova); +struct dmar_domain *intel_iommu_alloc_domain(void); +void intel_iommu_free_domain(struct dmar_domain *domain); +int intel_iommu_attach_device(struct dmar_domain *domain, + struct pci_dev *pdev); +void intel_iommu_detach_device(struct dmar_domain *domain, + struct pci_dev *pdev); +int intel_iommu_map_address(struct dmar_domain *domain, dma_addr_t iova, + u64 hpa, size_t size, int prot); +void intel_iommu_unmap_address(struct dmar_domain *domain, + dma_addr_t iova, size_t size); +u64 intel_iommu_iova_to_phys(struct dmar_domain *domain, u64 iova); #ifdef CONFIG_DMAR int intel_iommu_found(void); -- 1.5.1