1 files changed, 267 insertions, 263 deletions

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 3f7b81c065d2..a2692724b68f 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -18,6 +18,7 @@
  * Author: Ashok Raj <ashok.raj@intel.com>
  * Author: Shaohua Li <shaohua.li@intel.com>
  * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
+ * Author: Fenghua Yu <fenghua.yu@intel.com>
  */
 
 #include <linux/init.h>
@@ -33,13 +34,15 @@
 #include <linux/dma-mapping.h>
 #include <linux/mempool.h>
 #include <linux/timer.h>
-#include "iova.h"
-#include "intel-iommu.h"
-#include <asm/proto.h> /* force_iommu in this header in x86-64*/
+#include <linux/iova.h>
+#include <linux/intel-iommu.h>
 #include <asm/cacheflush.h>
-#include <asm/gart.h>
+#include <asm/iommu.h>
 #include "pci.h"
 
+#define ROOT_SIZE               VTD_PAGE_SIZE
+#define CONTEXT_SIZE            VTD_PAGE_SIZE
+
 #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
 #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA)
 
@@ -49,8 +52,6 @@
 
 #define DEFAULT_DOMAIN_ADDRESS_WIDTH 48
 
-#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) /* 10sec */
-
 #define DOMAIN_MAX_ADDR(gaw) ((((u64)1) << gaw) - 1)
 
 
@@ -58,8 +59,6 @@ static void flush_unmaps_timeout(unsigned long data);
 
 DEFINE_TIMER(unmap_timer,  flush_unmaps_timeout, 0, 0);
 
-static struct intel_iommu *g_iommus;
-
 #define HIGH_WATER_MARK 250
 struct deferred_flush_tables {
         int next;
@@ -80,7 +79,7 @@ static long list_size;
 
 static void domain_remove_dev_info(struct dmar_domain *domain);
 
-static int dmar_disabled;
+int dmar_disabled;
 static int __initdata dmar_map_gfx = 1;
 static int dmar_forcedac;
 static int intel_iommu_strict;
@@ -160,7 +159,7 @@ static inline void *alloc_domain_mem(void)
         return iommu_kmem_cache_alloc(iommu_domain_cache);
 }
 
-static inline void free_domain_mem(void *vaddr)
+static void free_domain_mem(void *vaddr)
 {
         kmem_cache_free(iommu_domain_cache, vaddr);
 }
@@ -185,13 +184,6 @@ void free_iova_mem(struct iova *iova)
         kmem_cache_free(iommu_iova_cache, iova);
 }
 
-static inline void __iommu_flush_cache(
-        struct intel_iommu *iommu, void *addr, int size)
-{
-        if (!ecap_coherent(iommu->ecap))
-                clflush_cache_range(addr, size);
-}
-
 /* Gets context entry for a given bus and devfn */
 static struct context_entry * device_to_context_entry(struct intel_iommu *iommu,
                 u8 bus, u8 devfn)
@@ -210,7 +202,7 @@ static struct context_entry * device_to_context_entry(struct intel_iommu *iommu,
                         spin_unlock_irqrestore(&iommu->lock, flags);
                         return NULL;
                 }
-                __iommu_flush_cache(iommu, (void *)context, PAGE_SIZE_4K);
+                __iommu_flush_cache(iommu, (void *)context, CONTEXT_SIZE);
                 phy_addr = virt_to_phys((void *)context);
                 set_root_value(root, phy_addr);
                 set_root_present(root);
@@ -356,7 +348,7 @@ static struct dma_pte * addr_to_dma_pte(struct dmar_domain *domain, u64 addr)
                                 return NULL;
                         }
                         __iommu_flush_cache(domain->iommu, tmp_page,
-                                        PAGE_SIZE_4K);
+                                        PAGE_SIZE);
                         dma_set_pte_addr(*pte, virt_to_phys(tmp_page));
                         /*
                          * high level table always sets r/w, last level page
@@ -419,13 +411,13 @@ static void dma_pte_clear_range(struct dmar_domain *domain, u64 start, u64 end)
         start &= (((u64)1) << addr_width) - 1;
         end &= (((u64)1) << addr_width) - 1;
         /* in case it's partial page */
-        start = PAGE_ALIGN_4K(start);
-        end &= PAGE_MASK_4K;
+        start = PAGE_ALIGN(start);
+        end &= PAGE_MASK;
 
         /* we don't need lock here, nobody else touches the iova range */
         while (start < end) {
                 dma_pte_clear_one(domain, start);
-                start += PAGE_SIZE_4K;
+                start += VTD_PAGE_SIZE;
         }
 }
 
@@ -479,7 +471,7 @@ static int iommu_alloc_root_entry(struct intel_iommu *iommu)
         if (!root)
                 return -ENOMEM;
 
-        __iommu_flush_cache(iommu, root, PAGE_SIZE_4K);
+        __iommu_flush_cache(iommu, root, ROOT_SIZE);
 
         spin_lock_irqsave(&iommu->lock, flags);
         iommu->root_entry = root;
@@ -488,19 +480,6 @@ static int iommu_alloc_root_entry(struct intel_iommu *iommu)
         return 0;
 }
 
-#define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \
-{\
-        cycles_t start_time = get_cycles();\
-        while (1) {\
-                sts = op (iommu->reg + offset);\
-                if (cond)\
-                        break;\
-                if (DMAR_OPERATION_TIMEOUT < (get_cycles() - start_time))\
-                        panic("DMAR hardware is malfunctioning\n");\
-                cpu_relax();\
-        }\
-}
-
 static void iommu_set_root_entry(struct intel_iommu *iommu)
 {
         void *addr;
@@ -587,31 +566,10 @@ static int __iommu_flush_context(struct intel_iommu *iommu,
 
         spin_unlock_irqrestore(&iommu->register_lock, flag);
 
-        /* flush context entry will implictly flush write buffer */
+        /* flush context entry will implicitly flush write buffer */
         return 0;
 }
 
-static int inline iommu_flush_context_global(struct intel_iommu *iommu,
-        int non_present_entry_flush)
-{
-        return __iommu_flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL,
-                non_present_entry_flush);
-}
-
-static int inline iommu_flush_context_domain(struct intel_iommu *iommu, u16 did,
-        int non_present_entry_flush)
-{
-        return __iommu_flush_context(iommu, did, 0, 0, DMA_CCMD_DOMAIN_INVL,
-                non_present_entry_flush);
-}
-
-static int inline iommu_flush_context_device(struct intel_iommu *iommu,
-        u16 did, u16 source_id, u8 function_mask, int non_present_entry_flush)
-{
-        return __iommu_flush_context(iommu, did, source_id, function_mask,
-                DMA_CCMD_DEVICE_INVL, non_present_entry_flush);
-}
-
 /* return value determine if we need a write buffer flush */
 static int __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did,
         u64 addr, unsigned int size_order, u64 type,
@@ -679,37 +637,25 @@ static int __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did,
                 printk(KERN_ERR"IOMMU: flush IOTLB failed\n");
         if (DMA_TLB_IAIG(val) != DMA_TLB_IIRG(type))
                 pr_debug("IOMMU: tlb flush request %Lx, actual %Lx\n",
-                        DMA_TLB_IIRG(type), DMA_TLB_IAIG(val));
-        /* flush context entry will implictly flush write buffer */
+                        (unsigned long long)DMA_TLB_IIRG(type),
+                        (unsigned long long)DMA_TLB_IAIG(val));
+        /* flush iotlb entry will implicitly flush write buffer */
         return 0;
 }
 
-static int inline iommu_flush_iotlb_global(struct intel_iommu *iommu,
-        int non_present_entry_flush)
-{
-        return __iommu_flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH,
-                non_present_entry_flush);
-}
-
-static int inline iommu_flush_iotlb_dsi(struct intel_iommu *iommu, u16 did,
-        int non_present_entry_flush)
-{
-        return __iommu_flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH,
-                non_present_entry_flush);
-}
-
 static int iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did,
         u64 addr, unsigned int pages, int non_present_entry_flush)
 {
         unsigned int mask;
 
-        BUG_ON(addr & (~PAGE_MASK_4K));
+        BUG_ON(addr & (~VTD_PAGE_MASK));
         BUG_ON(pages == 0);
 
         /* Fallback to domain selective flush if no PSI support */
         if (!cap_pgsel_inv(iommu->cap))
-                return iommu_flush_iotlb_dsi(iommu, did,
-                        non_present_entry_flush);
+                return iommu->flush.flush_iotlb(iommu, did, 0, 0,
+                                                DMA_TLB_DSI_FLUSH,
+                                                non_present_entry_flush);
 
         /*
          * PSI requires page size to be 2 ^ x, and the base address is naturally
@@ -718,11 +664,12 @@ static int iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did,
         mask = ilog2(__roundup_pow_of_two(pages));
         /* Fallback to domain selective flush if size is too big */
         if (mask > cap_max_amask_val(iommu->cap))
-                return iommu_flush_iotlb_dsi(iommu, did,
-                        non_present_entry_flush);
+                return iommu->flush.flush_iotlb(iommu, did, 0, 0,
+                        DMA_TLB_DSI_FLUSH, non_present_entry_flush);
 
-        return __iommu_flush_iotlb(iommu, did, addr, mask,
-                DMA_TLB_PSI_FLUSH, non_present_entry_flush);
+        return iommu->flush.flush_iotlb(iommu, did, addr, mask,
+                                        DMA_TLB_PSI_FLUSH,
+                                        non_present_entry_flush);
 }
 
 static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu)
@@ -855,7 +802,7 @@ void dmar_msi_read(int irq, struct msi_msg *msg)
 }
 
 static int iommu_page_fault_do_one(struct intel_iommu *iommu, int type,
-                u8 fault_reason, u16 source_id, u64 addr)
+                u8 fault_reason, u16 source_id, unsigned long long addr)
 {
         const char *reason;
 
@@ -990,6 +937,8 @@ static int iommu_init_domains(struct intel_iommu *iommu)
                 return -ENOMEM;
         }
 
+        spin_lock_init(&iommu->lock);
+
         /*
          * if Caching mode is set, then invalid translations are tagged
          * with domainid 0. Hence we need to pre-allocate it.
@@ -998,62 +947,15 @@ static int iommu_init_domains(struct intel_iommu *iommu)
                 set_bit(0, iommu->domain_ids);
         return 0;
 }
-static struct intel_iommu *alloc_iommu(struct intel_iommu *iommu,
-                                        struct dmar_drhd_unit *drhd)
-{
-        int ret;
-        int map_size;
-        u32 ver;
 
-        iommu->reg = ioremap(drhd->reg_base_addr, PAGE_SIZE_4K);
-        if (!iommu->reg) {
-                printk(KERN_ERR "IOMMU: can't map the region\n");
-                goto error;
-        }
-        iommu->cap = dmar_readq(iommu->reg + DMAR_CAP_REG);
-        iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG);
-
-        /* the registers might be more than one page */
-        map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap),
-                cap_max_fault_reg_offset(iommu->cap));
-        map_size = PAGE_ALIGN_4K(map_size);
-        if (map_size > PAGE_SIZE_4K) {
-                iounmap(iommu->reg);
-                iommu->reg = ioremap(drhd->reg_base_addr, map_size);
-                if (!iommu->reg) {
-                        printk(KERN_ERR "IOMMU: can't map the region\n");
-                        goto error;
-                }
-        }
-
-        ver = readl(iommu->reg + DMAR_VER_REG);
-        pr_debug("IOMMU %llx: ver %d:%d cap %llx ecap %llx\n",
-                drhd->reg_base_addr, DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver),
-                iommu->cap, iommu->ecap);
-        ret = iommu_init_domains(iommu);
-        if (ret)
-                goto error_unmap;
-        spin_lock_init(&iommu->lock);
-        spin_lock_init(&iommu->register_lock);
-
-        drhd->iommu = iommu;
-        return iommu;
-error_unmap:
-        iounmap(iommu->reg);
-error:
-        kfree(iommu);
-        return NULL;
-}
 
 static void domain_exit(struct dmar_domain *domain);
-static void free_iommu(struct intel_iommu *iommu)
+
+void free_dmar_iommu(struct intel_iommu *iommu)
 {
         struct dmar_domain *domain;
         int i;
 
-        if (!iommu)
-                return;
-
         i = find_first_bit(iommu->domain_ids, cap_ndoms(iommu->cap));
         for (; i < cap_ndoms(iommu->cap); ) {
                 domain = iommu->domains[i];
@@ -1078,10 +980,6 @@ static void free_iommu(struct intel_iommu *iommu)
 
         /* free context mapping */
         free_context_table(iommu);
-
-        if (iommu->reg)
-                iounmap(iommu->reg);
-        kfree(iommu);
 }
 
 static struct dmar_domain * iommu_alloc_domain(struct intel_iommu *iommu)
@@ -1157,9 +1055,9 @@ static void dmar_init_reserved_ranges(void)
                         if (!r->flags || !(r->flags & IORESOURCE_MEM))
                                 continue;
                         addr = r->start;
-                        addr &= PAGE_MASK_4K;
+                        addr &= PAGE_MASK;
                         size = r->end - addr;
-                        size = PAGE_ALIGN_4K(size);
+                        size = PAGE_ALIGN(size);
                         iova = reserve_iova(&reserved_iova_list, IOVA_PFN(addr),
                                 IOVA_PFN(size + addr) - 1);
                         if (!iova)
@@ -1221,7 +1119,7 @@ static int domain_init(struct dmar_domain *domain, int guest_width)
         domain->pgd = (struct dma_pte *)alloc_pgtable_page();
         if (!domain->pgd)
                 return -ENOMEM;
-        __iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE_4K);
+        __iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE);
         return 0;
 }
 
@@ -1237,7 +1135,7 @@ static void domain_exit(struct dmar_domain *domain)
         /* destroy iovas */
         put_iova_domain(&domain->iovad);
         end = DOMAIN_MAX_ADDR(domain->gaw);
-        end = end & (~PAGE_MASK_4K);
+        end = end & (~PAGE_MASK);
 
         /* clear ptes */
         dma_pte_clear_range(domain, 0, end);
@@ -1277,11 +1175,13 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
         __iommu_flush_cache(iommu, context, sizeof(*context));
 
         /* it's a non-present to present mapping */
-        if (iommu_flush_context_device(iommu, domain->id,
-                        (((u16)bus) << 8) | devfn, DMA_CCMD_MASK_NOBIT, 1))
+        if (iommu->flush.flush_context(iommu, domain->id,
+                (((u16)bus) << 8) | devfn, DMA_CCMD_MASK_NOBIT,
+                DMA_CCMD_DEVICE_INVL, 1))
                 iommu_flush_write_buffer(iommu);
         else
-                iommu_flush_iotlb_dsi(iommu, 0, 0);
+                iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_DSI_FLUSH, 0);
+
         spin_unlock_irqrestore(&iommu->lock, flags);
         return 0;
 }
@@ -1356,22 +1256,25 @@ domain_page_mapping(struct dmar_domain *domain, dma_addr_t iova,
         u64 start_pfn, end_pfn;
         struct dma_pte *pte;
         int index;
+        int addr_width = agaw_to_width(domain->agaw);
+
+        hpa &= (((u64)1) << addr_width) - 1;
 
         if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0)
                 return -EINVAL;
-        iova &= PAGE_MASK_4K;
-        start_pfn = ((u64)hpa) >> PAGE_SHIFT_4K;
-        end_pfn = (PAGE_ALIGN_4K(((u64)hpa) + size)) >> PAGE_SHIFT_4K;
+        iova &= PAGE_MASK;
+        start_pfn = ((u64)hpa) >> VTD_PAGE_SHIFT;
+        end_pfn = (VTD_PAGE_ALIGN(((u64)hpa) + size)) >> VTD_PAGE_SHIFT;
         index = 0;
         while (start_pfn < end_pfn) {
-                pte = addr_to_dma_pte(domain, iova + PAGE_SIZE_4K * index);
+                pte = addr_to_dma_pte(domain, iova + VTD_PAGE_SIZE * index);
                 if (!pte)
                         return -ENOMEM;
                 /* We don't need lock here, nobody else
                  * touches the iova range
                  */
                 BUG_ON(dma_pte_addr(*pte));
-                dma_set_pte_addr(*pte, start_pfn << PAGE_SHIFT_4K);
+                dma_set_pte_addr(*pte, start_pfn << VTD_PAGE_SHIFT);
                 dma_set_pte_prot(*pte, prot);
                 __iommu_flush_cache(domain->iommu, pte, sizeof(*pte));
                 start_pfn++;
@@ -1383,8 +1286,10 @@ domain_page_mapping(struct dmar_domain *domain, dma_addr_t iova,
 static void detach_domain_for_dev(struct dmar_domain *domain, u8 bus, u8 devfn)
 {
         clear_context_table(domain->iommu, bus, devfn);
-        iommu_flush_context_global(domain->iommu, 0);
-        iommu_flush_iotlb_global(domain->iommu, 0);
+        domain->iommu->flush.flush_context(domain->iommu, 0, 0, 0,
+                                           DMA_CCMD_GLOBAL_INVL, 0);
+        domain->iommu->flush.flush_iotlb(domain->iommu, 0, 0, 0,
+                                         DMA_TLB_GLOBAL_FLUSH, 0);
 }
 
 static void domain_remove_dev_info(struct dmar_domain *domain)
@@ -1414,7 +1319,7 @@ static void domain_remove_dev_info(struct dmar_domain *domain)
  * find_domain
  * Note: we use struct pci_dev->dev.archdata.iommu stores the info
  */
-struct dmar_domain *
+static struct dmar_domain *
 find_domain(struct pci_dev *pdev)
 {
         struct device_domain_info *info;
@@ -1426,37 +1331,6 @@ find_domain(struct pci_dev *pdev)
         return NULL;
 }
 
-static int dmar_pci_device_match(struct pci_dev *devices[], int cnt,
-     struct pci_dev *dev)
-{
-        int index;
-
-        while (dev) {
-                for (index = 0; index < cnt; index++)
-                        if (dev == devices[index])
-                                return 1;
-
-                /* Check our parent */
-                dev = dev->bus->self;
-        }
-
-        return 0;
-}
-
-static struct dmar_drhd_unit *
-dmar_find_matched_drhd_unit(struct pci_dev *dev)
-{
-        struct dmar_drhd_unit *drhd = NULL;
-
-        list_for_each_entry(drhd, &dmar_drhd_units, list) {
-                if (drhd->include_all || dmar_pci_device_match(drhd->devices,
-                                                drhd->devices_cnt, dev))
-                        return drhd;
-        }
-
-        return NULL;
-}
-
 /* domain is initialized */
 static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw)
 {
@@ -1578,11 +1452,13 @@ error:
         return find_domain(pdev);
 }
 
-static int iommu_prepare_identity_map(struct pci_dev *pdev, u64 start, u64 end)
+static int iommu_prepare_identity_map(struct pci_dev *pdev,
+                                      unsigned long long start,
+                                      unsigned long long end)
 {
         struct dmar_domain *domain;
         unsigned long size;
-        u64 base;
+        unsigned long long base;
         int ret;
 
         printk(KERN_INFO
@@ -1594,9 +1470,9 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev, u64 start, u64 end)
                 return -ENOMEM;
 
         /* The address might not be aligned */
-        base = start & PAGE_MASK_4K;
+        base = start & PAGE_MASK;
         size = end - base;
-        size = PAGE_ALIGN_4K(size);
+        size = PAGE_ALIGN(size);
         if (!reserve_iova(&domain->iovad, IOVA_PFN(base),
                         IOVA_PFN(base + size) - 1)) {
                 printk(KERN_ERR "IOMMU: reserve iova failed\n");
@@ -1729,8 +1605,6 @@ int __init init_dmars(void)
          * endfor
          */
         for_each_drhd_unit(drhd) {
-                if (drhd->ignored)
-                        continue;
                 g_num_of_iommus++;
                 /*
                  * lock not needed as this is only incremented in the single
@@ -1739,12 +1613,6 @@ int __init init_dmars(void)
                  */
         }
 
-        g_iommus = kzalloc(g_num_of_iommus * sizeof(*iommu), GFP_KERNEL);
-        if (!g_iommus) {
-                ret = -ENOMEM;
-                goto error;
-        }
-
         deferred_flush = kzalloc(g_num_of_iommus *
                 sizeof(struct deferred_flush_tables), GFP_KERNEL);
         if (!deferred_flush) {
@@ -1752,16 +1620,15 @@ int __init init_dmars(void)
                 goto error;
         }
 
-        i = 0;
         for_each_drhd_unit(drhd) {
                 if (drhd->ignored)
                         continue;
-                iommu = alloc_iommu(&g_iommus[i], drhd);
-                i++;
-                if (!iommu) {
-                        ret = -ENOMEM;
+
+                iommu = drhd->iommu;
+
+                ret = iommu_init_domains(iommu);
+                if (ret)
                         goto error;
-                }
 
                 /*
                  * TBD:
@@ -1775,6 +1642,28 @@ int __init init_dmars(void)
                 }
         }
 
+        for_each_drhd_unit(drhd) {
+                if (drhd->ignored)
+                        continue;
+
+                iommu = drhd->iommu;
+                if (dmar_enable_qi(iommu)) {
+                        /*
+                         * Queued Invalidate not enabled, use Register Based
+                         * Invalidate
+                         */
+                        iommu->flush.flush_context = __iommu_flush_context;
+                        iommu->flush.flush_iotlb = __iommu_flush_iotlb;
+                        printk(KERN_INFO "IOMMU 0x%Lx: using Register based "
+                               "invalidation\n", drhd->reg_base_addr);
+                } else {
+                        iommu->flush.flush_context = qi_flush_context;
+                        iommu->flush.flush_iotlb = qi_flush_iotlb;
+                        printk(KERN_INFO "IOMMU 0x%Lx: using Queued "
+                               "invalidation\n", drhd->reg_base_addr);
+                }
+        }
+
         /*
          * For each rmrr
          *   for each dev attached to rmrr
@@ -1827,9 +1716,10 @@ int __init init_dmars(void)
 
                 iommu_set_root_entry(iommu);
 
-                iommu_flush_context_global(iommu, 0);
-                iommu_flush_iotlb_global(iommu, 0);
-
+                iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL,
+                                           0);
+                iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH,
+                                         0);
                 iommu_disable_protect_mem_regions(iommu);
 
                 ret = iommu_enable_translation(iommu);
@@ -1845,15 +1735,14 @@ error:
                 iommu = drhd->iommu;
                 free_iommu(iommu);
         }
-        kfree(g_iommus);
         return ret;
 }
 
 static inline u64 aligned_size(u64 host_addr, size_t size)
 {
         u64 addr;
-        addr = (host_addr & (~PAGE_MASK_4K)) + size;
-        return PAGE_ALIGN_4K(addr);
+        addr = (host_addr & (~PAGE_MASK)) + size;
+        return PAGE_ALIGN(addr);
 }
 
 struct iova *
@@ -1867,20 +1756,20 @@ iommu_alloc_iova(struct dmar_domain *domain, size_t size, u64 end)
                 return NULL;
 
         piova = alloc_iova(&domain->iovad,
-                        size >> PAGE_SHIFT_4K, IOVA_PFN(end), 1);
+                        size >> PAGE_SHIFT, IOVA_PFN(end), 1);
         return piova;
 }
 
 static struct iova *
 __intel_alloc_iova(struct device *dev, struct dmar_domain *domain,
-                size_t size)
+                   size_t size, u64 dma_mask)
 {
         struct pci_dev *pdev = to_pci_dev(dev);
         struct iova *iova = NULL;
 
-        if ((pdev->dma_mask <= DMA_32BIT_MASK) || (dmar_forcedac)) {
-                iova = iommu_alloc_iova(domain, size, pdev->dma_mask);
-        } else  {
+        if (dma_mask <= DMA_32BIT_MASK || dmar_forcedac)
+                iova = iommu_alloc_iova(domain, size, dma_mask);
+        else {
                 /*
                  * First try to allocate an io virtual address in
                  * DMA_32BIT_MASK and if that fails then try allocating
@@ -1888,7 +1777,7 @@ __intel_alloc_iova(struct device *dev, struct dmar_domain *domain,
                  */
                 iova = iommu_alloc_iova(domain, size, DMA_32BIT_MASK);
                 if (!iova)
-                        iova = iommu_alloc_iova(domain, size, pdev->dma_mask);
+                        iova = iommu_alloc_iova(domain, size, dma_mask);
         }
 
         if (!iova) {
@@ -1927,12 +1816,12 @@ get_valid_domain_for_dev(struct pci_dev *pdev)
         return domain;
 }
 
-static dma_addr_t
-intel_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int dir)
+static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
+                                     size_t size, int dir, u64 dma_mask)
 {
         struct pci_dev *pdev = to_pci_dev(hwdev);
         struct dmar_domain *domain;
-        unsigned long start_paddr;
+        phys_addr_t start_paddr;
         struct iova *iova;
         int prot = 0;
         int ret;
@@ -1947,11 +1836,11 @@ intel_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int dir)
 
         size = aligned_size((u64)paddr, size);
 
-        iova = __intel_alloc_iova(hwdev, domain, size);
+        iova = __intel_alloc_iova(hwdev, domain, size, pdev->dma_mask);
         if (!iova)
                 goto error;
 
-        start_paddr = iova->pfn_lo << PAGE_SHIFT_4K;
+        start_paddr = (phys_addr_t)iova->pfn_lo << PAGE_SHIFT;
 
         /*
          * Check if DMAR supports zero-length reads on write only
@@ -1969,30 +1858,33 @@ intel_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int dir)
          * is not a big problem
          */
         ret = domain_page_mapping(domain, start_paddr,
-                ((u64)paddr) & PAGE_MASK_4K, size, prot);
+                ((u64)paddr) & PAGE_MASK, size, prot);
         if (ret)
                 goto error;
 
-        pr_debug("Device %s request: %lx@%llx mapping: %lx@%llx, dir %d\n",
-                pci_name(pdev), size, (u64)paddr,
-                size, (u64)start_paddr, dir);
-
         /* it's a non-present to present mapping */
         ret = iommu_flush_iotlb_psi(domain->iommu, domain->id,
-                        start_paddr, size >> PAGE_SHIFT_4K, 1);
+                        start_paddr, size >> VTD_PAGE_SHIFT, 1);
         if (ret)
                 iommu_flush_write_buffer(domain->iommu);
 
-        return (start_paddr + ((u64)paddr & (~PAGE_MASK_4K)));
+        return start_paddr + ((u64)paddr & (~PAGE_MASK));
 
 error:
         if (iova)
                 __free_iova(&domain->iovad, iova);
         printk(KERN_ERR"Device %s request: %lx@%llx dir %d --- failed\n",
-                pci_name(pdev), size, (u64)paddr, dir);
+                pci_name(pdev), size, (unsigned long long)paddr, dir);
         return 0;
 }
 
+dma_addr_t intel_map_single(struct device *hwdev, phys_addr_t paddr,
+                            size_t size, int dir)
+{
+        return __intel_map_single(hwdev, paddr, size, dir,
+                                  to_pci_dev(hwdev)->dma_mask);
+}
+
 static void flush_unmaps(void)
 {
         int i, j;
@@ -2002,7 +1894,11 @@ static void flush_unmaps(void)
         /* just flush them all */
         for (i = 0; i < g_num_of_iommus; i++) {
                 if (deferred_flush[i].next) {
-                        iommu_flush_iotlb_global(&g_iommus[i], 0);
+                        struct intel_iommu *iommu =
+                                deferred_flush[i].domain[0]->iommu;
+
+                        iommu->flush.flush_iotlb(iommu, 0, 0, 0,
+                                                 DMA_TLB_GLOBAL_FLUSH, 0);
                         for (j = 0; j < deferred_flush[i].next; j++) {
                                 __free_iova(&deferred_flush[i].domain[j]->iovad,
                                                 deferred_flush[i].iova[j]);
@@ -2032,7 +1928,8 @@ static void add_unmap(struct dmar_domain *dom, struct iova *iova)
         if (list_size == HIGH_WATER_MARK)
                 flush_unmaps();
 
-        iommu_id = dom->iommu - g_iommus;
+        iommu_id = dom->iommu->seq_id;
+
         next = deferred_flush[iommu_id].next;
         deferred_flush[iommu_id].domain[next] = dom;
         deferred_flush[iommu_id].iova[next] = iova;
@@ -2046,8 +1943,8 @@ static void add_unmap(struct dmar_domain *dom, struct iova *iova)
         spin_unlock_irqrestore(&async_umap_flush_lock, flags);
 }
 
-static void intel_unmap_single(struct device *dev, dma_addr_t dev_addr,
-        size_t size, int dir)
+void intel_unmap_single(struct device *dev, dma_addr_t dev_addr, size_t size,
+                        int dir)
 {
         struct pci_dev *pdev = to_pci_dev(dev);
         struct dmar_domain *domain;
@@ -2063,11 +1960,11 @@ static void intel_unmap_single(struct device *dev, dma_addr_t dev_addr,
         if (!iova)
                 return;
 
-        start_addr = iova->pfn_lo << PAGE_SHIFT_4K;
+        start_addr = iova->pfn_lo << PAGE_SHIFT;
         size = aligned_size((u64)dev_addr, size);
 
         pr_debug("Device %s unmapping: %lx@%llx\n",
-                pci_name(pdev), size, (u64)start_addr);
+                pci_name(pdev), size, (unsigned long long)start_addr);
 
         /*  clear the whole page */
         dma_pte_clear_range(domain, start_addr, start_addr + size);
@@ -2075,7 +1972,7 @@ static void intel_unmap_single(struct device *dev, dma_addr_t dev_addr,
         dma_pte_free_pagetable(domain, start_addr, start_addr + size);
         if (intel_iommu_strict) {
                 if (iommu_flush_iotlb_psi(domain->iommu,
-                        domain->id, start_addr, size >> PAGE_SHIFT_4K, 0))
+                        domain->id, start_addr, size >> VTD_PAGE_SHIFT, 0))
                         iommu_flush_write_buffer(domain->iommu);
                 /* free iova */
                 __free_iova(&domain->iovad, iova);
@@ -2088,13 +1985,13 @@ static void intel_unmap_single(struct device *dev, dma_addr_t dev_addr,
         }
 }
 
-static void * intel_alloc_coherent(struct device *hwdev, size_t size,
-                       dma_addr_t *dma_handle, gfp_t flags)
+void *intel_alloc_coherent(struct device *hwdev, size_t size,
+                           dma_addr_t *dma_handle, gfp_t flags)
 {
         void *vaddr;
         int order;
 
-        size = PAGE_ALIGN_4K(size);
+        size = PAGE_ALIGN(size);
         order = get_order(size);
         flags &= ~(GFP_DMA | GFP_DMA32);
 
@@ -2103,19 +2000,21 @@ static void * intel_alloc_coherent(struct device *hwdev, size_t size,
                 return NULL;
         memset(vaddr, 0, size);
 
-        *dma_handle = intel_map_single(hwdev, virt_to_bus(vaddr), size, DMA_BIDIRECTIONAL);
+        *dma_handle = __intel_map_single(hwdev, virt_to_bus(vaddr), size,
+                                         DMA_BIDIRECTIONAL,
+                                         hwdev->coherent_dma_mask);
         if (*dma_handle)
                 return vaddr;
         free_pages((unsigned long)vaddr, order);
         return NULL;
 }
 
-static void intel_free_coherent(struct device *hwdev, size_t size,
-        void *vaddr, dma_addr_t dma_handle)
+void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr,
+                         dma_addr_t dma_handle)
 {
         int order;
 
-        size = PAGE_ALIGN_4K(size);
+        size = PAGE_ALIGN(size);
         order = get_order(size);
 
         intel_unmap_single(hwdev, dma_handle, size, DMA_BIDIRECTIONAL);
@@ -2123,8 +2022,9 @@ static void intel_free_coherent(struct device *hwdev, size_t size,
 }
 
 #define SG_ENT_VIRT_ADDRESS(sg) (sg_virt((sg)))
-static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
-        int nelems, int dir)
+
+void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
+                    int nelems, int dir)
 {
         int i;
         struct pci_dev *pdev = to_pci_dev(hwdev);
@@ -2148,7 +2048,7 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
                 size += aligned_size((u64)addr, sg->length);
         }
 
-        start_addr = iova->pfn_lo << PAGE_SHIFT_4K;
+        start_addr = iova->pfn_lo << PAGE_SHIFT;
 
         /*  clear the whole page */
         dma_pte_clear_range(domain, start_addr, start_addr + size);
@@ -2156,7 +2056,7 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
         dma_pte_free_pagetable(domain, start_addr, start_addr + size);
 
         if (iommu_flush_iotlb_psi(domain->iommu, domain->id, start_addr,
-                        size >> PAGE_SHIFT_4K, 0))
+                        size >> VTD_PAGE_SHIFT, 0))
                 iommu_flush_write_buffer(domain->iommu);
 
         /* free iova */
@@ -2177,8 +2077,8 @@ static int intel_nontranslate_map_sg(struct device *hddev,
         return nelems;
 }
 
-static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist,
-                                int nelems, int dir)
+int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems,
+                 int dir)
 {
         void *addr;
         int i;
@@ -2206,7 +2106,7 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist,
                 size += aligned_size((u64)addr, sg->length);
         }
 
-        iova = __intel_alloc_iova(hwdev, domain, size);
+        iova = __intel_alloc_iova(hwdev, domain, size, pdev->dma_mask);
         if (!iova) {
                 sglist->dma_length = 0;
                 return 0;
@@ -2222,14 +2122,14 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist,
         if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
                 prot |= DMA_PTE_WRITE;
 
-        start_addr = iova->pfn_lo << PAGE_SHIFT_4K;
+        start_addr = iova->pfn_lo << PAGE_SHIFT;
         offset = 0;
         for_each_sg(sglist, sg, nelems, i) {
                 addr = SG_ENT_VIRT_ADDRESS(sg);
                 addr = (void *)virt_to_phys(addr);
                 size = aligned_size((u64)addr, sg->length);
                 ret = domain_page_mapping(domain, start_addr + offset,
-                        ((u64)addr) & PAGE_MASK_4K,
+                        ((u64)addr) & PAGE_MASK,
                         size, prot);
                 if (ret) {
                         /*  clear the page */
@@ -2243,14 +2143,14 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist,
                         return 0;
                 }
                 sg->dma_address = start_addr + offset +
-                                ((u64)addr & (~PAGE_MASK_4K));
+                                ((u64)addr & (~PAGE_MASK));
                 sg->dma_length = sg->length;
                 offset += size;
         }
 
         /* it's a non-present to present mapping */
         if (iommu_flush_iotlb_psi(domain->iommu, domain->id,
-                        start_addr, offset >> PAGE_SHIFT_4K, 1))
+                        start_addr, offset >> VTD_PAGE_SHIFT, 1))
                 iommu_flush_write_buffer(domain->iommu);
         return nelems;
 }
@@ -2290,7 +2190,6 @@ static inline int iommu_devinfo_cache_init(void)
                                          sizeof(struct device_domain_info),
                                          0,
                                          SLAB_HWCACHE_ALIGN,
-
                                          NULL);
         if (!iommu_devinfo_cache) {
                 printk(KERN_ERR "Couldn't create devinfo cache\n");
@@ -2308,7 +2207,6 @@ static inline int iommu_iova_cache_init(void)
                                          sizeof(struct iova),
                                          0,
                                          SLAB_HWCACHE_ALIGN,
-
                                          NULL);
         if (!iommu_iova_cache) {
                 printk(KERN_ERR "Couldn't create iova cache\n");
@@ -2348,15 +2246,6 @@ static void __init iommu_exit_mempool(void)
 
 }
 
-void __init detect_intel_iommu(void)
-{
-        if (swiotlb || no_iommu || iommu_detected || dmar_disabled)
-                return;
-        if (early_dmar_detect()) {
-                iommu_detected = 1;
-        }
-}
-
 static void __init init_no_remapping_devices(void)
 {
         struct dmar_drhd_unit *drhd;
@@ -2403,12 +2292,19 @@ int __init intel_iommu_init(void)
 {
         int ret = 0;
 
-        if (no_iommu || swiotlb || dmar_disabled)
-                return -ENODEV;
-
         if (dmar_table_init())
                 return  -ENODEV;
 
+        if (dmar_dev_scope_init())
+                return  -ENODEV;
+
+        /*
+         * Check the need for DMA-remapping initialization now.
+         * Above initialization will also be used by Interrupt-remapping.
+         */
+        if (no_iommu || swiotlb || dmar_disabled)
+                return -ENODEV;
+
         iommu_init_mempool();
         dmar_init_reserved_ranges();
 
@@ -2430,3 +2326,111 @@ int __init intel_iommu_init(void)
         return 0;
 }
 
+void intel_iommu_domain_exit(struct dmar_domain *domain)
+{
+        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);
+        if (!domain) {
+                printk(KERN_ERR
+                        "intel_iommu_domain_alloc: domain == NULL\n");
+                return NULL;
+        }
+        if (domain_init(domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
+                printk(KERN_ERR
+                        "intel_iommu_domain_alloc: domain_init() failed\n");
+                intel_iommu_domain_exit(domain);
+                return NULL;
+        }
+        return domain;
+}
+EXPORT_SYMBOL_GPL(intel_iommu_domain_alloc);
+
+int intel_iommu_context_mapping(
+        struct dmar_domain *domain, struct pci_dev *pdev)
+{
+        int rc;
+        rc = domain_context_mapping(domain, pdev);
+        return rc;
+}
+EXPORT_SYMBOL_GPL(intel_iommu_context_mapping);
+
+int intel_iommu_page_mapping(
+        struct dmar_domain *domain, dma_addr_t iova,
+        u64 hpa, size_t size, int prot)
+{
+        int rc;
+        rc = domain_page_mapping(domain, iova, hpa, size, prot);
+        return rc;
+}
+EXPORT_SYMBOL_GPL(intel_iommu_page_mapping);
+
+void intel_iommu_detach_dev(struct dmar_domain *domain, u8 bus, u8 devfn)
+{
+        detach_domain_for_dev(domain, bus, devfn);
+}
+EXPORT_SYMBOL_GPL(intel_iommu_detach_dev);
+
+struct dmar_domain *
+intel_iommu_find_domain(struct pci_dev *pdev)
+{
+        return find_domain(pdev);
+}
+EXPORT_SYMBOL_GPL(intel_iommu_find_domain);
+
+int intel_iommu_found(void)
+{
+        return g_num_of_iommus;
+}
+EXPORT_SYMBOL_GPL(intel_iommu_found);
+
+u64 intel_iommu_iova_to_pfn(struct dmar_domain *domain, u64 iova)
+{
+        struct dma_pte *pte;
+        u64 pfn;
+
+        pfn = 0;
+        pte = addr_to_dma_pte(domain, iova);
+
+        if (pte)
+                pfn = dma_pte_addr(*pte);
+
+        return pfn >> VTD_PAGE_SHIFT;
+}
+EXPORT_SYMBOL_GPL(intel_iommu_iova_to_pfn);