1 files changed, 713 insertions, 582 deletions

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 98f230f6a28d..23824fef789c 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
+ * Copyright (C) 2007-2009 Advanced Micro Devices, Inc.
  * Author: Joerg Roedel <joerg.roedel@amd.com>
  *         Leo Duran <leo.duran@amd.com>
  *
@@ -19,7 +19,7 @@
 
 #include <linux/pci.h>
 #include <linux/gfp.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
 #include <linux/debugfs.h>
 #include <linux/scatterlist.h>
 #include <linux/dma-mapping.h>
@@ -28,6 +28,7 @@
 #include <asm/proto.h>
 #include <asm/iommu.h>
 #include <asm/gart.h>
+#include <asm/amd_iommu_proto.h>
 #include <asm/amd_iommu_types.h>
 #include <asm/amd_iommu.h>
 
@@ -56,20 +57,152 @@ struct iommu_cmd {
         u32 data[4];
 };
 
-static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
-                             struct unity_map_entry *e);
-static struct dma_ops_domain *find_protection_domain(u16 devid);
-static u64 *alloc_pte(struct protection_domain *domain,
-                      unsigned long address, int end_lvl,
-                      u64 **pte_page, gfp_t gfp);
-static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
-                                      unsigned long start_page,
-                                      unsigned int pages);
 static void reset_iommu_command_buffer(struct amd_iommu *iommu);
-static u64 *fetch_pte(struct protection_domain *domain,
-                      unsigned long address, int map_size);
 static void update_domain(struct protection_domain *domain);
 
+/****************************************************************************
+ *
+ * Helper functions
+ *
+ ****************************************************************************/
+
+static inline u16 get_device_id(struct device *dev)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+
+        return calc_devid(pdev->bus->number, pdev->devfn);
+}
+
+static struct iommu_dev_data *get_dev_data(struct device *dev)
+{
+        return dev->archdata.iommu;
+}
+
+/*
+ * In this function the list of preallocated protection domains is traversed to
+ * find the domain for a specific device
+ */
+static struct dma_ops_domain *find_protection_domain(u16 devid)
+{
+        struct dma_ops_domain *entry, *ret = NULL;
+        unsigned long flags;
+        u16 alias = amd_iommu_alias_table[devid];
+
+        if (list_empty(&iommu_pd_list))
+                return NULL;
+
+        spin_lock_irqsave(&iommu_pd_list_lock, flags);
+
+        list_for_each_entry(entry, &iommu_pd_list, list) {
+                if (entry->target_dev == devid ||
+                    entry->target_dev == alias) {
+                        ret = entry;
+                        break;
+                }
+        }
+
+        spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
+
+        return ret;
+}
+
+/*
+ * This function checks if the driver got a valid device from the caller to
+ * avoid dereferencing invalid pointers.
+ */
+static bool check_device(struct device *dev)
+{
+        u16 devid;
+
+        if (!dev || !dev->dma_mask)
+                return false;
+
+        /* No device or no PCI device */
+        if (!dev || dev->bus != &pci_bus_type)
+                return false;
+
+        devid = get_device_id(dev);
+
+        /* Out of our scope? */
+        if (devid > amd_iommu_last_bdf)
+                return false;
+
+        if (amd_iommu_rlookup_table[devid] == NULL)
+                return false;
+
+        return true;
+}
+
+static int iommu_init_device(struct device *dev)
+{
+        struct iommu_dev_data *dev_data;
+        struct pci_dev *pdev;
+        u16 devid, alias;
+
+        if (dev->archdata.iommu)
+                return 0;
+
+        dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL);
+        if (!dev_data)
+                return -ENOMEM;
+
+        dev_data->dev = dev;
+
+        devid = get_device_id(dev);
+        alias = amd_iommu_alias_table[devid];
+        pdev = pci_get_bus_and_slot(PCI_BUS(alias), alias & 0xff);
+        if (pdev)
+                dev_data->alias = &pdev->dev;
+
+        atomic_set(&dev_data->bind, 0);
+
+        dev->archdata.iommu = dev_data;
+
+
+        return 0;
+}
+
+static void iommu_uninit_device(struct device *dev)
+{
+        kfree(dev->archdata.iommu);
+}
+
+void __init amd_iommu_uninit_devices(void)
+{
+        struct pci_dev *pdev = NULL;
+
+        for_each_pci_dev(pdev) {
+
+                if (!check_device(&pdev->dev))
+                        continue;
+
+                iommu_uninit_device(&pdev->dev);
+        }
+}
+
+int __init amd_iommu_init_devices(void)
+{
+        struct pci_dev *pdev = NULL;
+        int ret = 0;
+
+        for_each_pci_dev(pdev) {
+
+                if (!check_device(&pdev->dev))
+                        continue;
+
+                ret = iommu_init_device(&pdev->dev);
+                if (ret)
+                        goto out_free;
+        }
+
+        return 0;
+
+out_free:
+
+        amd_iommu_uninit_devices();
+
+        return ret;
+}
 #ifdef CONFIG_AMD_IOMMU_STATS
 
 /*
@@ -90,7 +223,6 @@ DECLARE_STATS_COUNTER(alloced_io_mem);
 DECLARE_STATS_COUNTER(total_map_requests);
 
 static struct dentry *stats_dir;
-static struct dentry *de_isolate;
 static struct dentry *de_fflush;
 
 static void amd_iommu_stats_add(struct __iommu_counter *cnt)
@@ -108,9 +240,6 @@ static void amd_iommu_stats_init(void)
         if (stats_dir == NULL)
                 return;
 
-        de_isolate = debugfs_create_bool("isolation", 0444, stats_dir,
-                                         (u32 *)&amd_iommu_isolate);
-
         de_fflush  = debugfs_create_bool("fullflush", 0444, stats_dir,
                                          (u32 *)&amd_iommu_unmap_flush);
 
@@ -130,12 +259,6 @@ static void amd_iommu_stats_init(void)
 
 #endif
 
-/* returns !0 if the IOMMU is caching non-present entries in its TLB */
-static int iommu_has_npcache(struct amd_iommu *iommu)
-{
-        return iommu->cap & (1UL << IOMMU_CAP_NPCACHE);
-}
-
 /****************************************************************************
  *
  * Interrupt handling functions
@@ -199,6 +322,7 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
                 break;
         case EVENT_TYPE_ILL_CMD:
                 printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address);
+                iommu->reset_in_progress = true;
                 reset_iommu_command_buffer(iommu);
                 dump_command(address);
                 break;
@@ -321,11 +445,8 @@ static void __iommu_wait_for_completion(struct amd_iommu *iommu)
         status &= ~MMIO_STATUS_COM_WAIT_INT_MASK;
         writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET);
 
-        if (unlikely(i == EXIT_LOOP_COUNT)) {
-                spin_unlock(&iommu->lock);
-                reset_iommu_command_buffer(iommu);
-                spin_lock(&iommu->lock);
-        }
+        if (unlikely(i == EXIT_LOOP_COUNT))
+                iommu->reset_in_progress = true;
 }
 
 /*
@@ -372,26 +493,46 @@ static int iommu_completion_wait(struct amd_iommu *iommu)
 out:
         spin_unlock_irqrestore(&iommu->lock, flags);
 
+        if (iommu->reset_in_progress)
+                reset_iommu_command_buffer(iommu);
+
         return 0;
 }
 
+static void iommu_flush_complete(struct protection_domain *domain)
+{
+        int i;
+
+        for (i = 0; i < amd_iommus_present; ++i) {
+                if (!domain->dev_iommu[i])
+                        continue;
+
+                /*
+                 * Devices of this domain are behind this IOMMU
+                 * We need to wait for completion of all commands.
+                 */
+                iommu_completion_wait(amd_iommus[i]);
+        }
+}
+
 /*
  * Command send function for invalidating a device table entry
  */
-static int iommu_queue_inv_dev_entry(struct amd_iommu *iommu, u16 devid)
+static int iommu_flush_device(struct device *dev)
 {
+        struct amd_iommu *iommu;
         struct iommu_cmd cmd;
-        int ret;
+        u16 devid;
 
-        BUG_ON(iommu == NULL);
+        devid = get_device_id(dev);
+        iommu = amd_iommu_rlookup_table[devid];
 
+        /* Build command */
         memset(&cmd, 0, sizeof(cmd));
         CMD_SET_TYPE(&cmd, CMD_INV_DEV_ENTRY);
         cmd.data[0] = devid;
 
-        ret = iommu_queue_command(iommu, &cmd);
-
-        return ret;
+        return iommu_queue_command(iommu, &cmd);
 }
 
 static void __iommu_build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address,
@@ -430,11 +571,11 @@ static int iommu_queue_inv_iommu_pages(struct amd_iommu *iommu,
  * It invalidates a single PTE if the range to flush is within a single
  * page. Otherwise it flushes the whole TLB of the IOMMU.
  */
-static int iommu_flush_pages(struct amd_iommu *iommu, u16 domid,
-                u64 address, size_t size)
+static void __iommu_flush_pages(struct protection_domain *domain,
+                                u64 address, size_t size, int pde)
 {
-        int s = 0;
-        unsigned pages = iommu_num_pages(address, size, PAGE_SIZE);
+        int s = 0, i;
+        unsigned long pages = iommu_num_pages(address, size, PAGE_SIZE);
 
         address &= PAGE_MASK;
 
@@ -447,142 +588,212 @@ static int iommu_flush_pages(struct amd_iommu *iommu, u16 domid,
                 s = 1;
         }
 
-        iommu_queue_inv_iommu_pages(iommu, address, domid, 0, s);
 
-        return 0;
+        for (i = 0; i < amd_iommus_present; ++i) {
+                if (!domain->dev_iommu[i])
+                        continue;
+
+                /*
+                 * Devices of this domain are behind this IOMMU
+                 * We need a TLB flush
+                 */
+                iommu_queue_inv_iommu_pages(amd_iommus[i], address,
+                                            domain->id, pde, s);
+        }
+
+        return;
 }
 
-/* Flush the whole IO/TLB for a given protection domain */
-static void iommu_flush_tlb(struct amd_iommu *iommu, u16 domid)
+static void iommu_flush_pages(struct protection_domain *domain,
+                             u64 address, size_t size)
 {
-        u64 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;
-
-        INC_STATS_COUNTER(domain_flush_single);
+        __iommu_flush_pages(domain, address, size, 0);
+}
 
-        iommu_queue_inv_iommu_pages(iommu, address, domid, 0, 1);
+/* Flush the whole IO/TLB for a given protection domain */
+static void iommu_flush_tlb(struct protection_domain *domain)
+{
+        __iommu_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0);
 }
 
 /* Flush the whole IO/TLB for a given protection domain - including PDE */
-static void iommu_flush_tlb_pde(struct amd_iommu *iommu, u16 domid)
+static void iommu_flush_tlb_pde(struct protection_domain *domain)
 {
-       u64 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;
-
-       INC_STATS_COUNTER(domain_flush_single);
-
-       iommu_queue_inv_iommu_pages(iommu, address, domid, 1, 1);
+        __iommu_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1);
 }
 
+
 /*
- * This function flushes one domain on one IOMMU
+ * This function flushes the DTEs for all devices in domain
  */
-static void flush_domain_on_iommu(struct amd_iommu *iommu, u16 domid)
+static void iommu_flush_domain_devices(struct protection_domain *domain)
 {
-        struct iommu_cmd cmd;
+        struct iommu_dev_data *dev_data;
         unsigned long flags;
 
-        __iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
-                                      domid, 1, 1);
+        spin_lock_irqsave(&domain->lock, flags);
 
-        spin_lock_irqsave(&iommu->lock, flags);
-        __iommu_queue_command(iommu, &cmd);
-        __iommu_completion_wait(iommu);
-        __iommu_wait_for_completion(iommu);
-        spin_unlock_irqrestore(&iommu->lock, flags);
+        list_for_each_entry(dev_data, &domain->dev_list, list)
+                iommu_flush_device(dev_data->dev);
+
+        spin_unlock_irqrestore(&domain->lock, flags);
 }
 
-static void flush_all_domains_on_iommu(struct amd_iommu *iommu)
+static void iommu_flush_all_domain_devices(void)
 {
-        int i;
+        struct protection_domain *domain;
+        unsigned long flags;
 
-        for (i = 1; i < MAX_DOMAIN_ID; ++i) {
-                if (!test_bit(i, amd_iommu_pd_alloc_bitmap))
-                        continue;
-                flush_domain_on_iommu(iommu, i);
+        spin_lock_irqsave(&amd_iommu_pd_lock, flags);
+
+        list_for_each_entry(domain, &amd_iommu_pd_list, list) {
+                iommu_flush_domain_devices(domain);
+                iommu_flush_complete(domain);
         }
 
+        spin_unlock_irqrestore(&amd_iommu_pd_lock, flags);
+}
+
+void amd_iommu_flush_all_devices(void)
+{
+        iommu_flush_all_domain_devices();
 }
 
 /*
- * This function is used to flush the IO/TLB for a given protection domain
- * on every IOMMU in the system
+ * This function uses heavy locking and may disable irqs for some time. But
+ * this is no issue because it is only called during resume.
  */
-static void iommu_flush_domain(u16 domid)
+void amd_iommu_flush_all_domains(void)
 {
-        struct amd_iommu *iommu;
+        struct protection_domain *domain;
+        unsigned long flags;
 
-        INC_STATS_COUNTER(domain_flush_all);
+        spin_lock_irqsave(&amd_iommu_pd_lock, flags);
 
-        for_each_iommu(iommu)
-                flush_domain_on_iommu(iommu, domid);
+        list_for_each_entry(domain, &amd_iommu_pd_list, list) {
+                spin_lock(&domain->lock);
+                iommu_flush_tlb_pde(domain);
+                iommu_flush_complete(domain);
+                spin_unlock(&domain->lock);
+        }
+
+        spin_unlock_irqrestore(&amd_iommu_pd_lock, flags);
 }
 
-void amd_iommu_flush_all_domains(void)
+static void reset_iommu_command_buffer(struct amd_iommu *iommu)
 {
-        struct amd_iommu *iommu;
+        pr_err("AMD-Vi: Resetting IOMMU command buffer\n");
 
-        for_each_iommu(iommu)
-                flush_all_domains_on_iommu(iommu);
+        if (iommu->reset_in_progress)
+                panic("AMD-Vi: ILLEGAL_COMMAND_ERROR while resetting command buffer\n");
+
+        amd_iommu_reset_cmd_buffer(iommu);
+        amd_iommu_flush_all_devices();
+        amd_iommu_flush_all_domains();
+
+        iommu->reset_in_progress = false;
 }
 
-static void flush_all_devices_for_iommu(struct amd_iommu *iommu)
+/****************************************************************************
+ *
+ * The functions below are used the create the page table mappings for
+ * unity mapped regions.
+ *
+ ****************************************************************************/
+
+/*
+ * This function is used to add another level to an IO page table. Adding
+ * another level increases the size of the address space by 9 bits to a size up
+ * to 64 bits.
+ */
+static bool increase_address_space(struct protection_domain *domain,
+                                   gfp_t gfp)
 {
-        int i;
+        u64 *pte;
 
-        for (i = 0; i <= amd_iommu_last_bdf; ++i) {
-                if (iommu != amd_iommu_rlookup_table[i])
-                        continue;
+        if (domain->mode == PAGE_MODE_6_LEVEL)
+                /* address space already 64 bit large */
+                return false;
 
-                iommu_queue_inv_dev_entry(iommu, i);
-                iommu_completion_wait(iommu);
-        }
+        pte = (void *)get_zeroed_page(gfp);
+        if (!pte)
+                return false;
+
+        *pte             = PM_LEVEL_PDE(domain->mode,
+                                        virt_to_phys(domain->pt_root));
+        domain->pt_root  = pte;
+        domain->mode    += 1;
+        domain->updated  = true;
+
+        return true;
 }
 
-static void flush_devices_by_domain(struct protection_domain *domain)
+static u64 *alloc_pte(struct protection_domain *domain,
+                      unsigned long address,
+                      int end_lvl,
+                      u64 **pte_page,
+                      gfp_t gfp)
 {
-        struct amd_iommu *iommu;
-        int i;
+        u64 *pte, *page;
+        int level;
 
-        for (i = 0; i <= amd_iommu_last_bdf; ++i) {
-                if ((domain == NULL && amd_iommu_pd_table[i] == NULL) ||
-                    (amd_iommu_pd_table[i] != domain))
-                        continue;
+        while (address > PM_LEVEL_SIZE(domain->mode))
+                increase_address_space(domain, gfp);
 
-                iommu = amd_iommu_rlookup_table[i];
-                if (!iommu)
-                        continue;
+        level =  domain->mode - 1;
+        pte   = &domain->pt_root[PM_LEVEL_INDEX(level, address)];
+
+        while (level > end_lvl) {
+                if (!IOMMU_PTE_PRESENT(*pte)) {
+                        page = (u64 *)get_zeroed_page(gfp);
+                        if (!page)
+                                return NULL;
+                        *pte = PM_LEVEL_PDE(level, virt_to_phys(page));
+                }
+
+                level -= 1;
+
+                pte = IOMMU_PTE_PAGE(*pte);
+
+                if (pte_page && level == end_lvl)
+                        *pte_page = pte;
 
-                iommu_queue_inv_dev_entry(iommu, i);
-                iommu_completion_wait(iommu);
+                pte = &pte[PM_LEVEL_INDEX(level, address)];
         }
+
+        return pte;
 }
 
-static void reset_iommu_command_buffer(struct amd_iommu *iommu)
+/*
+ * This function checks if there is a PTE for a given dma address. If
+ * there is one, it returns the pointer to it.
+ */
+static u64 *fetch_pte(struct protection_domain *domain,
+                      unsigned long address, int map_size)
 {
-        pr_err("AMD-Vi: Resetting IOMMU command buffer\n");
+        int level;
+        u64 *pte;
 
-        if (iommu->reset_in_progress)
-                panic("AMD-Vi: ILLEGAL_COMMAND_ERROR while resetting command buffer\n");
+        level =  domain->mode - 1;
+        pte   = &domain->pt_root[PM_LEVEL_INDEX(level, address)];
 
-        iommu->reset_in_progress = true;
+        while (level > map_size) {
+                if (!IOMMU_PTE_PRESENT(*pte))
+                        return NULL;
 
-        amd_iommu_reset_cmd_buffer(iommu);
-        flush_all_devices_for_iommu(iommu);
-        flush_all_domains_on_iommu(iommu);
+                level -= 1;
 
-        iommu->reset_in_progress = false;
-}
+                pte = IOMMU_PTE_PAGE(*pte);
+                pte = &pte[PM_LEVEL_INDEX(level, address)];
 
-void amd_iommu_flush_all_devices(void)
-{
-        flush_devices_by_domain(NULL);
-}
+                if ((PM_PTE_LEVEL(*pte) == 0) && level != map_size) {
+                        pte = NULL;
+                        break;
+                }
+        }
 
-/****************************************************************************
- *
- * The functions below are used the create the page table mappings for
- * unity mapped regions.
- *
- ****************************************************************************/
+        return pte;
+}
 
 /*
  * Generic mapping functions. It maps a physical address into a DMA
@@ -654,28 +865,6 @@ static int iommu_for_unity_map(struct amd_iommu *iommu,
 }
 
 /*
- * Init the unity mappings for a specific IOMMU in the system
- *
- * Basically iterates over all unity mapping entries and applies them to
- * the default domain DMA of that IOMMU if necessary.
- */
-static int iommu_init_unity_mappings(struct amd_iommu *iommu)
-{
-        struct unity_map_entry *entry;
-        int ret;
-
-        list_for_each_entry(entry, &amd_iommu_unity_map, list) {
-                if (!iommu_for_unity_map(iommu, entry))
-                        continue;
-                ret = dma_ops_unity_map(iommu->default_dom, entry);
-                if (ret)
-                        return ret;
-        }
-
-        return 0;
-}
-
-/*
  * This function actually applies the mapping to the page table of the
  * dma_ops domain.
  */
@@ -704,6 +893,28 @@ static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
 }
 
 /*
+ * Init the unity mappings for a specific IOMMU in the system
+ *
+ * Basically iterates over all unity mapping entries and applies them to
+ * the default domain DMA of that IOMMU if necessary.
+ */
+static int iommu_init_unity_mappings(struct amd_iommu *iommu)
+{
+        struct unity_map_entry *entry;
+        int ret;
+
+        list_for_each_entry(entry, &amd_iommu_unity_map, list) {
+                if (!iommu_for_unity_map(iommu, entry))
+                        continue;
+                ret = dma_ops_unity_map(iommu->default_dom, entry);
+                if (ret)
+                        return ret;
+        }
+
+        return 0;
+}
+
+/*
  * Inits the unity mappings required for a specific device
  */
 static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom,
@@ -740,34 +951,23 @@ static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom,
  */
 
 /*
- * This function checks if there is a PTE for a given dma address. If
- * there is one, it returns the pointer to it.
+ * Used to reserve address ranges in the aperture (e.g. for exclusion
+ * ranges.
  */
-static u64 *fetch_pte(struct protection_domain *domain,
-                      unsigned long address, int map_size)
+static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
+                                      unsigned long start_page,
+                                      unsigned int pages)
 {
-        int level;
-        u64 *pte;
-
-        level =  domain->mode - 1;
-        pte   = &domain->pt_root[PM_LEVEL_INDEX(level, address)];
-
-        while (level > map_size) {
-                if (!IOMMU_PTE_PRESENT(*pte))
-                        return NULL;
-
-                level -= 1;
+        unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT;
 
-                pte = IOMMU_PTE_PAGE(*pte);
-                pte = &pte[PM_LEVEL_INDEX(level, address)];
+        if (start_page + pages > last_page)
+                pages = last_page - start_page;
 
-                if ((PM_PTE_LEVEL(*pte) == 0) && level != map_size) {
-                        pte = NULL;
-                        break;
-                }
+        for (i = start_page; i < start_page + pages; ++i) {
+                int index = i / APERTURE_RANGE_PAGES;
+                int page  = i % APERTURE_RANGE_PAGES;
+                __set_bit(page, dom->aperture[index]->bitmap);
         }
-
-        return pte;
 }
 
 /*
@@ -775,11 +975,11 @@ static u64 *fetch_pte(struct protection_domain *domain,
  * aperture in case of dma_ops domain allocation or address allocation
  * failure.
  */
-static int alloc_new_range(struct amd_iommu *iommu,
-                           struct dma_ops_domain *dma_dom,
+static int alloc_new_range(struct dma_ops_domain *dma_dom,
                            bool populate, gfp_t gfp)
 {
         int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
+        struct amd_iommu *iommu;
         int i;
 
 #ifdef CONFIG_IOMMU_STRESS
@@ -819,14 +1019,17 @@ static int alloc_new_range(struct amd_iommu *iommu,
         dma_dom->aperture_size += APERTURE_RANGE_SIZE;
 
         /* Intialize the exclusion range if necessary */
-        if (iommu->exclusion_start &&
-            iommu->exclusion_start >= dma_dom->aperture[index]->offset &&
-            iommu->exclusion_start < dma_dom->aperture_size) {
-                unsigned long startpage = iommu->exclusion_start >> PAGE_SHIFT;
-                int pages = iommu_num_pages(iommu->exclusion_start,
-                                            iommu->exclusion_length,
-                                            PAGE_SIZE);
-                dma_ops_reserve_addresses(dma_dom, startpage, pages);
+        for_each_iommu(iommu) {
+                if (iommu->exclusion_start &&
+                    iommu->exclusion_start >= dma_dom->aperture[index]->offset
+                    && iommu->exclusion_start < dma_dom->aperture_size) {
+                        unsigned long startpage;
+                        int pages = iommu_num_pages(iommu->exclusion_start,
+                                                    iommu->exclusion_length,
+                                                    PAGE_SIZE);
+                        startpage = iommu->exclusion_start >> PAGE_SHIFT;
+                        dma_ops_reserve_addresses(dma_dom, startpage, pages);
+                }
         }
 
         /*
@@ -928,7 +1131,7 @@ static unsigned long dma_ops_alloc_addresses(struct device *dev,
         }
 
         if (unlikely(address == -1))
-                address = bad_dma_address;
+                address = DMA_ERROR_CODE;
 
         WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size);
 
@@ -959,7 +1162,7 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom,
 
         address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT;
 
-        iommu_area_free(range->bitmap, address, pages);
+        bitmap_clear(range->bitmap, address, pages);
 
 }
 
@@ -973,6 +1176,31 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom,
  *
  ****************************************************************************/
 
+/*
+ * This function adds a protection domain to the global protection domain list
+ */
+static void add_domain_to_list(struct protection_domain *domain)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&amd_iommu_pd_lock, flags);
+        list_add(&domain->list, &amd_iommu_pd_list);
+        spin_unlock_irqrestore(&amd_iommu_pd_lock, flags);
+}
+
+/*
+ * This function removes a protection domain to the global
+ * protection domain list
+ */
+static void del_domain_from_list(struct protection_domain *domain)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&amd_iommu_pd_lock, flags);
+        list_del(&domain->list);
+        spin_unlock_irqrestore(&amd_iommu_pd_lock, flags);
+}
+
 static u16 domain_id_alloc(void)
 {
         unsigned long flags;
@@ -1000,26 +1228,6 @@ static void domain_id_free(int id)
         write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
 }
 
-/*
- * Used to reserve address ranges in the aperture (e.g. for exclusion
- * ranges.
- */
-static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
-                                      unsigned long start_page,
-                                      unsigned int pages)
-{
-        unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT;
-
-        if (start_page + pages > last_page)
-                pages = last_page - start_page;
-
-        for (i = start_page; i < start_page + pages; ++i) {
-                int index = i / APERTURE_RANGE_PAGES;
-                int page  = i % APERTURE_RANGE_PAGES;
-                __set_bit(page, dom->aperture[index]->bitmap);
-        }
-}
-
 static void free_pagetable(struct protection_domain *domain)
 {
         int i, j;
@@ -1061,6 +1269,8 @@ static void dma_ops_domain_free(struct dma_ops_domain *dom)
         if (!dom)
                 return;
 
+        del_domain_from_list(&dom->domain);
+
         free_pagetable(&dom->domain);
 
         for (i = 0; i < APERTURE_MAX_RANGES; ++i) {
@@ -1078,7 +1288,7 @@ static void dma_ops_domain_free(struct dma_ops_domain *dom)
  * It also intializes the page table and the address allocator data
  * structures required for the dma_ops interface
  */
-static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu)
+static struct dma_ops_domain *dma_ops_domain_alloc(void)
 {
         struct dma_ops_domain *dma_dom;
 
@@ -1091,6 +1301,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu)
         dma_dom->domain.id = domain_id_alloc();
         if (dma_dom->domain.id == 0)
                 goto free_dma_dom;
+        INIT_LIST_HEAD(&dma_dom->domain.dev_list);
         dma_dom->domain.mode = PAGE_MODE_2_LEVEL;
         dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL);
         dma_dom->domain.flags = PD_DMA_OPS_MASK;
@@ -1101,7 +1312,9 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu)
         dma_dom->need_flush = false;
         dma_dom->target_dev = 0xffff;
 
-        if (alloc_new_range(iommu, dma_dom, true, GFP_KERNEL))
+        add_domain_to_list(&dma_dom->domain);
+
+        if (alloc_new_range(dma_dom, true, GFP_KERNEL))
                 goto free_dma_dom;
 
         /*
@@ -1129,22 +1342,6 @@ static bool dma_ops_domain(struct protection_domain *domain)
         return domain->flags & PD_DMA_OPS_MASK;
 }
 
-/*
- * Find out the protection domain structure for a given PCI device. This
- * will give us the pointer to the page table root for example.
- */
-static struct protection_domain *domain_for_device(u16 devid)
-{
-        struct protection_domain *dom;
-        unsigned long flags;
-
-        read_lock_irqsave(&amd_iommu_devtable_lock, flags);
-        dom = amd_iommu_pd_table[devid];
-        read_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
-
-        return dom;
-}
-
 static void set_dte_entry(u16 devid, struct protection_domain *domain)
 {
         u64 pte_root = virt_to_phys(domain->pt_root);
@@ -1156,42 +1353,123 @@ static void set_dte_entry(u16 devid, struct protection_domain *domain)
         amd_iommu_dev_table[devid].data[2] = domain->id;
         amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root);
         amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root);
+}
 
-        amd_iommu_pd_table[devid] = domain;
+static void clear_dte_entry(u16 devid)
+{
+        /* remove entry from the device table seen by the hardware */
+        amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV;
+        amd_iommu_dev_table[devid].data[1] = 0;
+        amd_iommu_dev_table[devid].data[2] = 0;
+
+        amd_iommu_apply_erratum_63(devid);
+}
+
+static void do_attach(struct device *dev, struct protection_domain *domain)
+{
+        struct iommu_dev_data *dev_data;
+        struct amd_iommu *iommu;
+        u16 devid;
+
+        devid    = get_device_id(dev);
+        iommu    = amd_iommu_rlookup_table[devid];
+        dev_data = get_dev_data(dev);
+
+        /* Update data structures */
+        dev_data->domain = domain;
+        list_add(&dev_data->list, &domain->dev_list);
+        set_dte_entry(devid, domain);
+
+        /* Do reference counting */
+        domain->dev_iommu[iommu->index] += 1;
+        domain->dev_cnt                 += 1;
+
+        /* Flush the DTE entry */
+        iommu_flush_device(dev);
+}
+
+static void do_detach(struct device *dev)
+{
+        struct iommu_dev_data *dev_data;
+        struct amd_iommu *iommu;
+        u16 devid;
+
+        devid    = get_device_id(dev);
+        iommu    = amd_iommu_rlookup_table[devid];
+        dev_data = get_dev_data(dev);
+
+        /* decrease reference counters */
+        dev_data->domain->dev_iommu[iommu->index] -= 1;
+        dev_data->domain->dev_cnt                 -= 1;
+
+        /* Update data structures */
+        dev_data->domain = NULL;
+        list_del(&dev_data->list);
+        clear_dte_entry(devid);
+
+        /* Flush the DTE entry */
+        iommu_flush_device(dev);
 }
 
 /*
  * If a device is not yet associated with a domain, this function does
  * assigns it visible for the hardware
  */
-static void __attach_device(struct amd_iommu *iommu,
-                            struct protection_domain *domain,
-                            u16 devid)
+static int __attach_device(struct device *dev,
+                           struct protection_domain *domain)
 {
+        struct iommu_dev_data *dev_data, *alias_data;
+
+        dev_data   = get_dev_data(dev);
+        alias_data = get_dev_data(dev_data->alias);
+
+        if (!alias_data)
+                return -EINVAL;
+
         /* lock domain */
         spin_lock(&domain->lock);
 
-        /* update DTE entry */
-        set_dte_entry(devid, domain);
+        /* Some sanity checks */
+        if (alias_data->domain != NULL &&
+            alias_data->domain != domain)
+                return -EBUSY;
+
+        if (dev_data->domain != NULL &&
+            dev_data->domain != domain)
+                return -EBUSY;
 
-        domain->dev_cnt += 1;
+        /* Do real assignment */
+        if (dev_data->alias != dev) {
+                alias_data = get_dev_data(dev_data->alias);
+                if (alias_data->domain == NULL)
+                        do_attach(dev_data->alias, domain);
+
+                atomic_inc(&alias_data->bind);
+        }
+
+        if (dev_data->domain == NULL)
+                do_attach(dev, domain);
+
+        atomic_inc(&dev_data->bind);
 
         /* ready */
         spin_unlock(&domain->lock);
+
+        return 0;
 }
 
 /*
  * If a device is not yet associated with a domain, this function does
  * assigns it visible for the hardware
  */
-static void attach_device(struct amd_iommu *iommu,
-                          struct protection_domain *domain,
-                          u16 devid)
+static int attach_device(struct device *dev,
+                         struct protection_domain *domain)
 {
         unsigned long flags;
+        int ret;
 
         write_lock_irqsave(&amd_iommu_devtable_lock, flags);
-        __attach_device(iommu, domain, devid);
+        ret = __attach_device(dev, domain);
         write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
 
         /*
@@ -1199,96 +1477,125 @@ static void attach_device(struct amd_iommu *iommu,
          * left the caches in the IOMMU dirty. So we have to flush
          * here to evict all dirty stuff.
          */
-        iommu_queue_inv_dev_entry(iommu, devid);
-        iommu_flush_tlb_pde(iommu, domain->id);
+        iommu_flush_tlb_pde(domain);
+
+        return ret;
 }
 
 /*
  * Removes a device from a protection domain (unlocked)
  */
-static void __detach_device(struct protection_domain *domain, u16 devid)
+static void __detach_device(struct device *dev)
 {
+        struct iommu_dev_data *dev_data = get_dev_data(dev);
+        struct iommu_dev_data *alias_data;
+        unsigned long flags;
 
-        /* lock domain */
-        spin_lock(&domain->lock);
+        BUG_ON(!dev_data->domain);
 
-        /* remove domain from the lookup table */
-        amd_iommu_pd_table[devid] = NULL;
+        spin_lock_irqsave(&dev_data->domain->lock, flags);
 
-        /* remove entry from the device table seen by the hardware */
-        amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV;
-        amd_iommu_dev_table[devid].data[1] = 0;
-        amd_iommu_dev_table[devid].data[2] = 0;
+        if (dev_data->alias != dev) {
+                alias_data = get_dev_data(dev_data->alias);
+                if (atomic_dec_and_test(&alias_data->bind))
+                        do_detach(dev_data->alias);
+        }
 
-        /* decrease reference counter */
-        domain->dev_cnt -= 1;
+        if (atomic_dec_and_test(&dev_data->bind))
+                do_detach(dev);
 
-        /* ready */
-        spin_unlock(&domain->lock);
+        spin_unlock_irqrestore(&dev_data->domain->lock, flags);
 
         /*
          * If we run in passthrough mode the device must be assigned to the
          * passthrough domain if it is detached from any other domain
          */
-        if (iommu_pass_through) {
-                struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
-                __attach_device(iommu, pt_domain, devid);
-        }
+        if (iommu_pass_through && dev_data->domain == NULL)
+                __attach_device(dev, pt_domain);
 }
 
 /*
  * Removes a device from a protection domain (with devtable_lock held)
  */
-static void detach_device(struct protection_domain *domain, u16 devid)
+static void detach_device(struct device *dev)
 {
         unsigned long flags;
 
         /* lock device table */
         write_lock_irqsave(&amd_iommu_devtable_lock, flags);
-        __detach_device(domain, devid);
+        __detach_device(dev);
         write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
 }
 
+/*
+ * Find out the protection domain structure for a given PCI device. This
+ * will give us the pointer to the page table root for example.
+ */
+static struct protection_domain *domain_for_device(struct device *dev)
+{
+        struct protection_domain *dom;
+        struct iommu_dev_data *dev_data, *alias_data;
+        unsigned long flags;
+        u16 devid, alias;
+
+        devid      = get_device_id(dev);
+        alias      = amd_iommu_alias_table[devid];
+        dev_data   = get_dev_data(dev);
+        alias_data = get_dev_data(dev_data->alias);
+        if (!alias_data)
+                return NULL;
+
+        read_lock_irqsave(&amd_iommu_devtable_lock, flags);
+        dom = dev_data->domain;
+        if (dom == NULL &&
+            alias_data->domain != NULL) {
+                __attach_device(dev, alias_data->domain);
+                dom = alias_data->domain;
+        }
+
+        read_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
+
+        return dom;
+}
+
 static int device_change_notifier(struct notifier_block *nb,
                                   unsigned long action, void *data)
 {
         struct device *dev = data;
-        struct pci_dev *pdev = to_pci_dev(dev);
-        u16 devid = calc_devid(pdev->bus->number, pdev->devfn);
+        u16 devid;
         struct protection_domain *domain;
         struct dma_ops_domain *dma_domain;
         struct amd_iommu *iommu;
         unsigned long flags;
 
-        if (devid > amd_iommu_last_bdf)
-                goto out;
-
-        devid = amd_iommu_alias_table[devid];
-
-        iommu = amd_iommu_rlookup_table[devid];
-        if (iommu == NULL)
-                goto out;
-
-        domain = domain_for_device(devid);
+        if (!check_device(dev))
+                return 0;
 
-        if (domain && !dma_ops_domain(domain))
-                WARN_ONCE(1, "AMD IOMMU WARNING: device %s already bound "
-                          "to a non-dma-ops domain\n", dev_name(dev));
+        devid  = get_device_id(dev);
+        iommu  = amd_iommu_rlookup_table[devid];
 
         switch (action) {
         case BUS_NOTIFY_UNBOUND_DRIVER:
+
+                domain = domain_for_device(dev);
+
                 if (!domain)
                         goto out;
                 if (iommu_pass_through)
                         break;
-                detach_device(domain, devid);
+                detach_device(dev);
                 break;
         case BUS_NOTIFY_ADD_DEVICE:
+
+                iommu_init_device(dev);
+
+                domain = domain_for_device(dev);
+
                 /* allocate a protection domain if a device is added */
                 dma_domain = find_protection_domain(devid);
                 if (dma_domain)
                         goto out;
-                dma_domain = dma_ops_domain_alloc(iommu);
+                dma_domain = dma_ops_domain_alloc();
                 if (!dma_domain)
                         goto out;
                 dma_domain->target_dev = devid;
@@ -1298,11 +1605,15 @@ static int device_change_notifier(struct notifier_block *nb,
                 spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
 
                 break;
+        case BUS_NOTIFY_DEL_DEVICE:
+
+                iommu_uninit_device(dev);
+
         default:
                 goto out;
         }
 
-        iommu_queue_inv_dev_entry(iommu, devid);
+        iommu_flush_device(dev);
         iommu_completion_wait(iommu);
 
 out:
@@ -1313,6 +1624,11 @@ static struct notifier_block device_nb = {
         .notifier_call = device_change_notifier,
 };
 
+void amd_iommu_init_notifier(void)
+{
+        bus_register_notifier(&pci_bus_type, &device_nb);
+}
+
 /*****************************************************************************
  *
  * The next functions belong to the dma_ops mapping/unmapping code.
@@ -1320,106 +1636,46 @@ static struct notifier_block device_nb = {
  *****************************************************************************/
 
 /*
- * This function checks if the driver got a valid device from the caller to
- * avoid dereferencing invalid pointers.
- */
-static bool check_device(struct device *dev)
-{
-        if (!dev || !dev->dma_mask)
-                return false;
-
-        return true;
-}
-
-/*
- * In this function the list of preallocated protection domains is traversed to
- * find the domain for a specific device
- */
-static struct dma_ops_domain *find_protection_domain(u16 devid)
-{
-        struct dma_ops_domain *entry, *ret = NULL;
-        unsigned long flags;
-
-        if (list_empty(&iommu_pd_list))
-                return NULL;
-
-        spin_lock_irqsave(&iommu_pd_list_lock, flags);
-
-        list_for_each_entry(entry, &iommu_pd_list, list) {
-                if (entry->target_dev == devid) {
-                        ret = entry;
-                        break;
-                }
-        }
-
-        spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
-
-        return ret;
-}
-
-/*
  * In the dma_ops path we only have the struct device. This function
  * finds the corresponding IOMMU, the protection domain and the
  * requestor id for a given device.
  * If the device is not yet associated with a domain this is also done
  * in this function.
  */
-static int get_device_resources(struct device *dev,
-                                struct amd_iommu **iommu,
-                                struct protection_domain **domain,
-                                u16 *bdf)
+static struct protection_domain *get_domain(struct device *dev)
 {
+        struct protection_domain *domain;
         struct dma_ops_domain *dma_dom;
-        struct pci_dev *pcidev;
-        u16 _bdf;
-
-        *iommu = NULL;
-        *domain = NULL;
-        *bdf = 0xffff;
-
-        if (dev->bus != &pci_bus_type)
-                return 0;
-
-        pcidev = to_pci_dev(dev);
-        _bdf = calc_devid(pcidev->bus->number, pcidev->devfn);
+        u16 devid = get_device_id(dev);
 
-        /* device not translated by any IOMMU in the system? */
-        if (_bdf > amd_iommu_last_bdf)
-                return 0;
+        if (!check_device(dev))
+                return ERR_PTR(-EINVAL);
 
-        *bdf = amd_iommu_alias_table[_bdf];
+        domain = domain_for_device(dev);
+        if (domain != NULL && !dma_ops_domain(domain))
+                return ERR_PTR(-EBUSY);
 
-        *iommu = amd_iommu_rlookup_table[*bdf];
-        if (*iommu == NULL)
-                return 0;
-        *domain = domain_for_device(*bdf);
-        if (*domain == NULL) {
-                dma_dom = find_protection_domain(*bdf);
-                if (!dma_dom)
-                        dma_dom = (*iommu)->default_dom;
-                *domain = &dma_dom->domain;
-                attach_device(*iommu, *domain, *bdf);
-                DUMP_printk("Using protection domain %d for device %s\n",
-                            (*domain)->id, dev_name(dev));
-        }
+        if (domain != NULL)
+                return domain;
 
-        if (domain_for_device(_bdf) == NULL)
-                attach_device(*iommu, *domain, _bdf);
+        /* Device not bount yet - bind it */
+        dma_dom = find_protection_domain(devid);
+        if (!dma_dom)
+                dma_dom = amd_iommu_rlookup_table[devid]->default_dom;
+        attach_device(dev, &dma_dom->domain);
+        DUMP_printk("Using protection domain %d for device %s\n",
+                    dma_dom->domain.id, dev_name(dev));
 
-        return 1;
+        return &dma_dom->domain;
 }
 
 static void update_device_table(struct protection_domain *domain)
 {
-        unsigned long flags;
-        int i;
+        struct iommu_dev_data *dev_data;
 
-        for (i = 0; i <= amd_iommu_last_bdf; ++i) {
-                if (amd_iommu_pd_table[i] != domain)
-                        continue;
-                write_lock_irqsave(&amd_iommu_devtable_lock, flags);
-                set_dte_entry(i, domain);
-                write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
+        list_for_each_entry(dev_data, &domain->dev_list, list) {
+                u16 devid = get_device_id(dev_data->dev);
+                set_dte_entry(devid, domain);
         }
 }
 
@@ -1429,76 +1685,13 @@ static void update_domain(struct protection_domain *domain)
                 return;
 
         update_device_table(domain);
-        flush_devices_by_domain(domain);
-        iommu_flush_domain(domain->id);
+        iommu_flush_domain_devices(domain);
+        iommu_flush_tlb_pde(domain);
 
         domain->updated = false;
 }
 
 /*
- * This function is used to add another level to an IO page table. Adding
- * another level increases the size of the address space by 9 bits to a size up
- * to 64 bits.
- */
-static bool increase_address_space(struct protection_domain *domain,
-                                   gfp_t gfp)
-{
-        u64 *pte;
-
-        if (domain->mode == PAGE_MODE_6_LEVEL)
-                /* address space already 64 bit large */
-                return false;
-
-        pte = (void *)get_zeroed_page(gfp);
-        if (!pte)
-                return false;
-
-        *pte             = PM_LEVEL_PDE(domain->mode,
-                                        virt_to_phys(domain->pt_root));
-        domain->pt_root  = pte;
-        domain->mode    += 1;
-        domain->updated  = true;
-
-        return true;
-}
-
-static u64 *alloc_pte(struct protection_domain *domain,
-                      unsigned long address,
-                      int end_lvl,
-                      u64 **pte_page,
-                      gfp_t gfp)
-{
-        u64 *pte, *page;
-        int level;
-
-        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)];
-
-        while (level > end_lvl) {
-                if (!IOMMU_PTE_PRESENT(*pte)) {
-                        page = (u64 *)get_zeroed_page(gfp);
-                        if (!page)
-                                return NULL;
-                        *pte = PM_LEVEL_PDE(level, virt_to_phys(page));
-                }
-
-                level -= 1;
-
-                pte = IOMMU_PTE_PAGE(*pte);
-
-                if (pte_page && level == end_lvl)
-                        *pte_page = pte;
-
-                pte = &pte[PM_LEVEL_INDEX(level, address)];
-        }
-
-        return pte;
-}
-
-/*
  * This function fetches the PTE for a given address in the aperture
  */
 static u64* dma_ops_get_pte(struct dma_ops_domain *dom,
@@ -1528,8 +1721,7 @@ static u64* dma_ops_get_pte(struct dma_ops_domain *dom,
  * This is the generic map function. It maps one 4kb page at paddr to
  * the given address in the DMA address space for the domain.
  */
-static dma_addr_t dma_ops_domain_map(struct amd_iommu *iommu,
-                                     struct dma_ops_domain *dom,
+static dma_addr_t dma_ops_domain_map(struct dma_ops_domain *dom,
                                      unsigned long address,
                                      phys_addr_t paddr,
                                      int direction)
@@ -1542,7 +1734,7 @@ static dma_addr_t dma_ops_domain_map(struct amd_iommu *iommu,
 
         pte  = dma_ops_get_pte(dom, address);
         if (!pte)
-                return bad_dma_address;
+                return DMA_ERROR_CODE;
 
         __pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC;
 
@@ -1563,8 +1755,7 @@ static dma_addr_t dma_ops_domain_map(struct amd_iommu *iommu,
 /*
  * The generic unmapping function for on page in the DMA address space.
  */
-static void dma_ops_domain_unmap(struct amd_iommu *iommu,
-                                 struct dma_ops_domain *dom,
+static void dma_ops_domain_unmap(struct dma_ops_domain *dom,
                                  unsigned long address)
 {
         struct aperture_range *aperture;
@@ -1595,7 +1786,6 @@ static void dma_ops_domain_unmap(struct amd_iommu *iommu,
  * Must be called with the domain lock held.
  */
 static dma_addr_t __map_single(struct device *dev,
-                               struct amd_iommu *iommu,
                                struct dma_ops_domain *dma_dom,
                                phys_addr_t paddr,
                                size_t size,
@@ -1623,7 +1813,7 @@ static dma_addr_t __map_single(struct device *dev,
 retry:
         address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask,
                                           dma_mask);
-        if (unlikely(address == bad_dma_address)) {
+        if (unlikely(address == DMA_ERROR_CODE)) {
                 /*
                  * setting next_address here will let the address
                  * allocator only scan the new allocated range in the
@@ -1631,11 +1821,11 @@ retry:
                  */
                 dma_dom->next_address = dma_dom->aperture_size;
 
-                if (alloc_new_range(iommu, dma_dom, false, GFP_ATOMIC))
+                if (alloc_new_range(dma_dom, false, GFP_ATOMIC))
                         goto out;
 
                 /*
-                 * aperture was sucessfully enlarged by 128 MB, try
+                 * aperture was successfully enlarged by 128 MB, try
                  * allocation again
                  */
                 goto retry;
@@ -1643,8 +1833,8 @@ retry:
 
         start = address;
         for (i = 0; i < pages; ++i) {
-                ret = dma_ops_domain_map(iommu, dma_dom, start, paddr, dir);
-                if (ret == bad_dma_address)
+                ret = dma_ops_domain_map(dma_dom, start, paddr, dir);
+                if (ret == DMA_ERROR_CODE)
                         goto out_unmap;
 
                 paddr += PAGE_SIZE;
@@ -1655,10 +1845,10 @@ retry:
         ADD_STATS_COUNTER(alloced_io_mem, size);
 
         if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) {
-                iommu_flush_tlb(iommu, dma_dom->domain.id);
+                iommu_flush_tlb(&dma_dom->domain);
                 dma_dom->need_flush = false;
-        } else if (unlikely(iommu_has_npcache(iommu)))
-                iommu_flush_pages(iommu, dma_dom->domain.id, address, size);
+        } else if (unlikely(amd_iommu_np_cache))
+                iommu_flush_pages(&dma_dom->domain, address, size);
 
 out:
         return address;
@@ -1667,20 +1857,19 @@ out_unmap:
 
         for (--i; i >= 0; --i) {
                 start -= PAGE_SIZE;
-                dma_ops_domain_unmap(iommu, dma_dom, start);
+                dma_ops_domain_unmap(dma_dom, start);
         }
 
         dma_ops_free_addresses(dma_dom, address, pages);
 
-        return bad_dma_address;
+        return DMA_ERROR_CODE;
 }
 
 /*
  * Does the reverse of the __map_single function. Must be called with
  * the domain lock held too
  */
-static void __unmap_single(struct amd_iommu *iommu,
-                           struct dma_ops_domain *dma_dom,
+static void __unmap_single(struct dma_ops_domain *dma_dom,
                            dma_addr_t dma_addr,
                            size_t size,
                            int dir)
@@ -1688,7 +1877,7 @@ static void __unmap_single(struct amd_iommu *iommu,
         dma_addr_t i, start;
         unsigned int pages;
 
-        if ((dma_addr == bad_dma_address) ||
+        if ((dma_addr == DMA_ERROR_CODE) ||
             (dma_addr + size > dma_dom->aperture_size))
                 return;
 
@@ -1697,7 +1886,7 @@ static void __unmap_single(struct amd_iommu *iommu,
         start = dma_addr;
 
         for (i = 0; i < pages; ++i) {
-                dma_ops_domain_unmap(iommu, dma_dom, start);
+                dma_ops_domain_unmap(dma_dom, start);
                 start += PAGE_SIZE;
         }
 
@@ -1706,7 +1895,7 @@ static void __unmap_single(struct amd_iommu *iommu,
         dma_ops_free_addresses(dma_dom, dma_addr, pages);
 
         if (amd_iommu_unmap_flush || dma_dom->need_flush) {
-                iommu_flush_pages(iommu, dma_dom->domain.id, dma_addr, size);
+                iommu_flush_pages(&dma_dom->domain, dma_addr, size);
                 dma_dom->need_flush = false;
         }
 }
@@ -1720,36 +1909,29 @@ static dma_addr_t map_page(struct device *dev, struct page *page,
                            struct dma_attrs *attrs)
 {
         unsigned long flags;
-        struct amd_iommu *iommu;
         struct protection_domain *domain;
-        u16 devid;
         dma_addr_t addr;
         u64 dma_mask;
         phys_addr_t paddr = page_to_phys(page) + offset;
 
         INC_STATS_COUNTER(cnt_map_single);
 
-        if (!check_device(dev))
-                return bad_dma_address;
-
-        dma_mask = *dev->dma_mask;
-
-        get_device_resources(dev, &iommu, &domain, &devid);
-
-        if (iommu == NULL || domain == NULL)
-                /* device not handled by any AMD IOMMU */
+        domain = get_domain(dev);
+        if (PTR_ERR(domain) == -EINVAL)
                 return (dma_addr_t)paddr;
+        else if (IS_ERR(domain))
+                return DMA_ERROR_CODE;
 
-        if (!dma_ops_domain(domain))
-                return bad_dma_address;
+        dma_mask = *dev->dma_mask;
 
         spin_lock_irqsave(&domain->lock, flags);
-        addr = __map_single(dev, iommu, domain->priv, paddr, size, dir, false,
+
+        addr = __map_single(dev, domain->priv, paddr, size, dir, false,
                             dma_mask);
-        if (addr == bad_dma_address)
+        if (addr == DMA_ERROR_CODE)
                 goto out;
 
-        iommu_completion_wait(iommu);
+        iommu_flush_complete(domain);
 
 out:
         spin_unlock_irqrestore(&domain->lock, flags);
@@ -1764,25 +1946,19 @@ static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
                        enum dma_data_direction dir, struct dma_attrs *attrs)
 {
         unsigned long flags;
-        struct amd_iommu *iommu;
         struct protection_domain *domain;
-        u16 devid;
 
         INC_STATS_COUNTER(cnt_unmap_single);
 
-        if (!check_device(dev) ||
-            !get_device_resources(dev, &iommu, &domain, &devid))
-                /* device not handled by any AMD IOMMU */
-                return;
-
-        if (!dma_ops_domain(domain))
+        domain = get_domain(dev);
+        if (IS_ERR(domain))
                 return;
 
         spin_lock_irqsave(&domain->lock, flags);
 
-        __unmap_single(iommu, domain->priv, dma_addr, size, dir);
+        __unmap_single(domain->priv, dma_addr, size, dir);
 
-        iommu_completion_wait(iommu);
+        iommu_flush_complete(domain);
 
         spin_unlock_irqrestore(&domain->lock, flags);
 }
@@ -1814,9 +1990,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
                   struct dma_attrs *attrs)
 {
         unsigned long flags;
-        struct amd_iommu *iommu;
         struct protection_domain *domain;
-        u16 devid;
         int i;
         struct scatterlist *s;
         phys_addr_t paddr;
@@ -1825,25 +1999,20 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
 
         INC_STATS_COUNTER(cnt_map_sg);
 
-        if (!check_device(dev))
+        domain = get_domain(dev);
+        if (PTR_ERR(domain) == -EINVAL)
+                return map_sg_no_iommu(dev, sglist, nelems, dir);
+        else if (IS_ERR(domain))
                 return 0;
 
         dma_mask = *dev->dma_mask;
 
-        get_device_resources(dev, &iommu, &domain, &devid);
-
-        if (!iommu || !domain)
-                return map_sg_no_iommu(dev, sglist, nelems, dir);
-
-        if (!dma_ops_domain(domain))
-                return 0;
-
         spin_lock_irqsave(&domain->lock, flags);
 
         for_each_sg(sglist, s, nelems, i) {
                 paddr = sg_phys(s);
 
-                s->dma_address = __map_single(dev, iommu, domain->priv,
+                s->dma_address = __map_single(dev, domain->priv,
                                               paddr, s->length, dir, false,
                                               dma_mask);
 
@@ -1854,7 +2023,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
                         goto unmap;
         }
 
-        iommu_completion_wait(iommu);
+        iommu_flush_complete(domain);
 
 out:
         spin_unlock_irqrestore(&domain->lock, flags);
@@ -1863,7 +2032,7 @@ out:
 unmap:
         for_each_sg(sglist, s, mapped_elems, i) {
                 if (s->dma_address)
-                        __unmap_single(iommu, domain->priv, s->dma_address,
+                        __unmap_single(domain->priv, s->dma_address,
                                        s->dma_length, dir);
                 s->dma_address = s->dma_length = 0;
         }
@@ -1882,30 +2051,25 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist,
                      struct dma_attrs *attrs)
 {
         unsigned long flags;
-        struct amd_iommu *iommu;
         struct protection_domain *domain;
         struct scatterlist *s;
-        u16 devid;
         int i;
 
         INC_STATS_COUNTER(cnt_unmap_sg);
 
-        if (!check_device(dev) ||
-            !get_device_resources(dev, &iommu, &domain, &devid))
-                return;
-
-        if (!dma_ops_domain(domain))
+        domain = get_domain(dev);
+        if (IS_ERR(domain))
                 return;
 
         spin_lock_irqsave(&domain->lock, flags);
 
         for_each_sg(sglist, s, nelems, i) {
-                __unmap_single(iommu, domain->priv, s->dma_address,
+                __unmap_single(domain->priv, s->dma_address,
                                s->dma_length, dir);
                 s->dma_address = s->dma_length = 0;
         }
 
-        iommu_completion_wait(iommu);
+        iommu_flush_complete(domain);
 
         spin_unlock_irqrestore(&domain->lock, flags);
 }
@@ -1918,49 +2082,44 @@ static void *alloc_coherent(struct device *dev, size_t size,
 {
         unsigned long flags;
         void *virt_addr;
-        struct amd_iommu *iommu;
         struct protection_domain *domain;
-        u16 devid;
         phys_addr_t paddr;
         u64 dma_mask = dev->coherent_dma_mask;
 
         INC_STATS_COUNTER(cnt_alloc_coherent);
 
-        if (!check_device(dev))
+        domain = get_domain(dev);
+        if (PTR_ERR(domain) == -EINVAL) {
+                virt_addr = (void *)__get_free_pages(flag, get_order(size));
+                *dma_addr = __pa(virt_addr);
+                return virt_addr;
+        } else if (IS_ERR(domain))
                 return NULL;
 
-        if (!get_device_resources(dev, &iommu, &domain, &devid))
-                flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
+        dma_mask  = dev->coherent_dma_mask;
+        flag     &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
+        flag     |= __GFP_ZERO;
 
-        flag |= __GFP_ZERO;
         virt_addr = (void *)__get_free_pages(flag, get_order(size));
         if (!virt_addr)
                 return NULL;
 
         paddr = virt_to_phys(virt_addr);
 
-        if (!iommu || !domain) {
-                *dma_addr = (dma_addr_t)paddr;
-                return virt_addr;
-        }
-
-        if (!dma_ops_domain(domain))
-                goto out_free;
-
         if (!dma_mask)
                 dma_mask = *dev->dma_mask;
 
         spin_lock_irqsave(&domain->lock, flags);
 
-        *dma_addr = __map_single(dev, iommu, domain->priv, paddr,
+        *dma_addr = __map_single(dev, domain->priv, paddr,
                                  size, DMA_BIDIRECTIONAL, true, dma_mask);
 
-        if (*dma_addr == bad_dma_address) {
+        if (*dma_addr == DMA_ERROR_CODE) {
                 spin_unlock_irqrestore(&domain->lock, flags);
                 goto out_free;
         }
 
-        iommu_completion_wait(iommu);
+        iommu_flush_complete(domain);
 
         spin_unlock_irqrestore(&domain->lock, flags);
 
@@ -1980,28 +2139,19 @@ static void free_coherent(struct device *dev, size_t size,
                           void *virt_addr, dma_addr_t dma_addr)
 {
         unsigned long flags;
-        struct amd_iommu *iommu;
         struct protection_domain *domain;
-        u16 devid;
 
         INC_STATS_COUNTER(cnt_free_coherent);
 
-        if (!check_device(dev))
-                return;
-
-        get_device_resources(dev, &iommu, &domain, &devid);
-
-        if (!iommu || !domain)
-                goto free_mem;
-
-        if (!dma_ops_domain(domain))
+        domain = get_domain(dev);
+        if (IS_ERR(domain))
                 goto free_mem;
 
         spin_lock_irqsave(&domain->lock, flags);
 
-        __unmap_single(iommu, domain->priv, dma_addr, size, DMA_BIDIRECTIONAL);
+        __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL);
 
-        iommu_completion_wait(iommu);
+        iommu_flush_complete(domain);
 
         spin_unlock_irqrestore(&domain->lock, flags);
 
@@ -2015,22 +2165,7 @@ free_mem:
  */
 static int amd_iommu_dma_supported(struct device *dev, u64 mask)
 {
-        u16 bdf;
-        struct pci_dev *pcidev;
-
-        /* No device or no PCI device */
-        if (!dev || dev->bus != &pci_bus_type)
-                return 0;
-
-        pcidev = to_pci_dev(dev);
-
-        bdf = calc_devid(pcidev->bus->number, pcidev->devfn);
-
-        /* Out of our scope? */
-        if (bdf > amd_iommu_last_bdf)
-                return 0;
-
-        return 1;
+        return check_device(dev);
 }
 
 /*
@@ -2044,25 +2179,28 @@ static void prealloc_protection_domains(void)
 {
         struct pci_dev *dev = NULL;
         struct dma_ops_domain *dma_dom;
-        struct amd_iommu *iommu;
         u16 devid;
 
         while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
-                devid = calc_devid(dev->bus->number, dev->devfn);
-                if (devid > amd_iommu_last_bdf)
-                        continue;
-                devid = amd_iommu_alias_table[devid];
-                if (domain_for_device(devid))
+
+                /* Do we handle this device? */
+                if (!check_device(&dev->dev))
                         continue;
-                iommu = amd_iommu_rlookup_table[devid];
-                if (!iommu)
+
+                /* Is there already any domain for it? */
+                if (domain_for_device(&dev->dev))
                         continue;
-                dma_dom = dma_ops_domain_alloc(iommu);
+
+                devid = get_device_id(&dev->dev);
+
+                dma_dom = dma_ops_domain_alloc();
                 if (!dma_dom)
                         continue;
                 init_unity_mappings_for_device(dma_dom, devid);
                 dma_dom->target_dev = devid;
 
+                attach_device(&dev->dev, &dma_dom->domain);
+
                 list_add_tail(&dma_dom->list, &iommu_pd_list);
         }
 }
@@ -2091,7 +2229,7 @@ int __init amd_iommu_init_dma_ops(void)
          * protection domain will be assigned to the default one.
          */
         for_each_iommu(iommu) {
-                iommu->default_dom = dma_ops_domain_alloc(iommu);
+                iommu->default_dom = dma_ops_domain_alloc();
                 if (iommu->default_dom == NULL)
                         return -ENOMEM;
                 iommu->default_dom->domain.flags |= PD_DEFAULT_MASK;
@@ -2101,15 +2239,12 @@ int __init amd_iommu_init_dma_ops(void)
         }
 
         /*
-         * If device isolation is enabled, pre-allocate the protection
-         * domains for each device.
+         * Pre-allocate the protection domains for each device.
          */
-        if (amd_iommu_isolate)
-                prealloc_protection_domains();
+        prealloc_protection_domains();
 
         iommu_detected = 1;
-        force_iommu = 1;
-        bad_dma_address = 0;
+        swiotlb = 0;
 #ifdef CONFIG_GART_IOMMU
         gart_iommu_aperture_disabled = 1;
         gart_iommu_aperture = 0;
@@ -2120,8 +2255,6 @@ int __init amd_iommu_init_dma_ops(void)
 
         register_iommu(&amd_iommu_ops);
 
-        bus_register_notifier(&pci_bus_type, &device_nb);
-
         amd_iommu_stats_init();
 
         return 0;
@@ -2148,14 +2281,17 @@ free_domains:
 
 static void cleanup_domain(struct protection_domain *domain)
 {
+        struct iommu_dev_data *dev_data, *next;
         unsigned long flags;
-        u16 devid;
 
         write_lock_irqsave(&amd_iommu_devtable_lock, flags);
 
-        for (devid = 0; devid <= amd_iommu_last_bdf; ++devid)
-                if (amd_iommu_pd_table[devid] == domain)
-                        __detach_device(domain, devid);
+        list_for_each_entry_safe(dev_data, next, &domain->dev_list, list) {
+                struct device *dev = dev_data->dev;
+
+                do_detach(dev);
+                atomic_set(&dev_data->bind, 0);
+        }
 
         write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
 }
@@ -2165,6 +2301,8 @@ static void protection_domain_free(struct protection_domain *domain)
         if (!domain)
                 return;
 
+        del_domain_from_list(domain);
+
         if (domain->id)
                 domain_id_free(domain->id);
 
@@ -2183,6 +2321,9 @@ static struct protection_domain *protection_domain_alloc(void)
         domain->id = domain_id_alloc();
         if (!domain->id)
                 goto out_err;
+        INIT_LIST_HEAD(&domain->dev_list);
+
+        add_domain_to_list(domain);
 
         return domain;
 
@@ -2239,26 +2380,23 @@ static void amd_iommu_domain_destroy(struct iommu_domain *dom)
 static void amd_iommu_detach_device(struct iommu_domain *dom,
                                     struct device *dev)
 {
-        struct protection_domain *domain = dom->priv;
+        struct iommu_dev_data *dev_data = dev->archdata.iommu;
         struct amd_iommu *iommu;
-        struct pci_dev *pdev;
         u16 devid;
 
-        if (dev->bus != &pci_bus_type)
+        if (!check_device(dev))
                 return;
 
-        pdev = to_pci_dev(dev);
+        devid = get_device_id(dev);
 
-        devid = calc_devid(pdev->bus->number, pdev->devfn);
-
-        if (devid > 0)
-                detach_device(domain, devid);
+        if (dev_data->domain != NULL)
+                detach_device(dev);
 
         iommu = amd_iommu_rlookup_table[devid];
         if (!iommu)
                 return;
 
-        iommu_queue_inv_dev_entry(iommu, devid);
+        iommu_flush_device(dev);
         iommu_completion_wait(iommu);
 }
 
@@ -2266,35 +2404,30 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
                                    struct device *dev)
 {
         struct protection_domain *domain = dom->priv;
-        struct protection_domain *old_domain;
+        struct iommu_dev_data *dev_data;
         struct amd_iommu *iommu;
-        struct pci_dev *pdev;
+        int ret;
         u16 devid;
 
-        if (dev->bus != &pci_bus_type)
+        if (!check_device(dev))
                 return -EINVAL;
 
-        pdev = to_pci_dev(dev);
-
-        devid = calc_devid(pdev->bus->number, pdev->devfn);
+        dev_data = dev->archdata.iommu;
 
-        if (devid >= amd_iommu_last_bdf ||
-                        devid != amd_iommu_alias_table[devid])
-                return -EINVAL;
+        devid = get_device_id(dev);
 
         iommu = amd_iommu_rlookup_table[devid];
         if (!iommu)
                 return -EINVAL;
 
-        old_domain = domain_for_device(devid);
-        if (old_domain)
-                detach_device(old_domain, devid);
+        if (dev_data->domain)
+                detach_device(dev);
 
-        attach_device(iommu, domain, devid);
+        ret = attach_device(dev, domain);
 
         iommu_completion_wait(iommu);
 
-        return 0;
+        return ret;
 }
 
 static int amd_iommu_map_range(struct iommu_domain *dom,
@@ -2340,7 +2473,7 @@ static void amd_iommu_unmap_range(struct iommu_domain *dom,
                 iova  += PAGE_SIZE;
         }
 
-        iommu_flush_domain(domain->id);
+        iommu_flush_tlb_pde(domain);
 }
 
 static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
@@ -2391,10 +2524,11 @@ static struct iommu_ops amd_iommu_ops = {
 
 int __init amd_iommu_init_passthrough(void)
 {
+        struct amd_iommu *iommu;
         struct pci_dev *dev = NULL;
-        u16 devid, devid2;
+        u16 devid;
 
-        /* allocate passthroug domain */
+        /* allocate passthrough domain */
         pt_domain = protection_domain_alloc();
         if (!pt_domain)
                 return -ENOMEM;
@@ -2402,20 +2536,17 @@ int __init amd_iommu_init_passthrough(void)
         pt_domain->mode |= PAGE_MODE_NONE;
 
         while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
-                struct amd_iommu *iommu;
 
-                devid = calc_devid(dev->bus->number, dev->devfn);
-                if (devid > amd_iommu_last_bdf)
+                if (!check_device(&dev->dev))
                         continue;
 
-                devid2 = amd_iommu_alias_table[devid];
+                devid = get_device_id(&dev->dev);
 
-                iommu = amd_iommu_rlookup_table[devid2];
+                iommu = amd_iommu_rlookup_table[devid];
                 if (!iommu)
                         continue;
 
-                __attach_device(iommu, pt_domain, devid);
-                __attach_device(iommu, pt_domain, devid2);
+                attach_device(&dev->dev, pt_domain);
         }
 
         pr_info("AMD-Vi: Initialized for Passthrough Mode\n");