Linux-libre 4.8.2-gnupck-4.8.2-gnu

1 files changed, 407 insertions, 607 deletions

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 2511c8b6a..96de97a46 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -21,6 +21,7 @@
 #include <linux/pci.h>
 #include <linux/acpi.h>
 #include <linux/amba/bus.h>
+#include <linux/platform_device.h>
 #include <linux/pci-ats.h>
 #include <linux/bitmap.h>
 #include <linux/slab.h>
@@ -38,6 +39,7 @@
 #include <linux/dma-contiguous.h>
 #include <linux/irqdomain.h>
 #include <linux/percpu.h>
+#include <linux/iova.h>
 #include <asm/irq_remapping.h>
 #include <asm/io_apic.h>
 #include <asm/apic.h>
@@ -56,6 +58,17 @@
 
 #define LOOP_TIMEOUT	100000
 
+/* IO virtual address start page frame number */
+#define IOVA_START_PFN		(1)
+#define IOVA_PFN(addr)		((addr) >> PAGE_SHIFT)
+#define DMA_32BIT_PFN		IOVA_PFN(DMA_BIT_MASK(32))
+
+/* Reserved IOVA ranges */
+#define MSI_RANGE_START		(0xfee00000)
+#define MSI_RANGE_END		(0xfeefffff)
+#define HT_RANGE_START		(0xfd00000000ULL)
+#define HT_RANGE_END		(0xffffffffffULL)
+
 /*
  * This bitmap is used to advertise the page sizes our hardware support
  * to the IOMMU core, which will then use this information to split
@@ -76,6 +89,25 @@ LIST_HEAD(ioapic_map);
 LIST_HEAD(hpet_map);
 LIST_HEAD(acpihid_map);
 
+#define FLUSH_QUEUE_SIZE 256
+
+struct flush_queue_entry {
+	unsigned long iova_pfn;
+	unsigned long pages;
+	struct dma_ops_domain *dma_dom;
+};
+
+struct flush_queue {
+	spinlock_t lock;
+	unsigned next;
+	struct flush_queue_entry *entries;
+};
+
+DEFINE_PER_CPU(struct flush_queue, flush_queue);
+
+static atomic_t queue_timer_on;
+static struct timer_list queue_timer;
+
 /*
  * Domain for untranslated devices - only allocated
  * if iommu=pt passed on kernel cmd line.
@@ -121,44 +153,19 @@ static int protection_domain_init(struct protection_domain *domain);
 static void detach_device(struct device *dev);
 
 /*
- * For dynamic growth the aperture size is split into ranges of 128MB of
- * DMA address space each. This struct represents one such range.
- */
-struct aperture_range {
-
-	spinlock_t bitmap_lock;
-
-	/* address allocation bitmap */
-	unsigned long *bitmap;
-	unsigned long offset;
-	unsigned long next_bit;
-
-	/*
-	 * Array of PTE pages for the aperture. In this array we save all the
-	 * leaf pages of the domain page table used for the aperture. This way
-	 * we don't need to walk the page table to find a specific PTE. We can
-	 * just calculate its address in constant time.
-	 */
-	u64 *pte_pages[64];
-};
-
-/*
  * Data container for a dma_ops specific protection domain
  */
 struct dma_ops_domain {
 	/* generic protection domain information */
 	struct protection_domain domain;
 
-	/* size of the aperture for the mappings */
-	unsigned long aperture_size;
-
-	/* aperture index we start searching for free addresses */
-	u32 __percpu *next_index;
-
-	/* address space relevant data */
-	struct aperture_range *aperture[APERTURE_MAX_RANGES];
+	/* IOVA RB-Tree */
+	struct iova_domain iovad;
 };
 
+static struct iova_domain reserved_iova_ranges;
+static struct lock_class_key reserved_rbtree_key;
+
 /****************************************************************************
  *
  * Helper functions
@@ -224,6 +231,12 @@ static struct protection_domain *to_pdomain(struct iommu_domain *dom)
 	return container_of(dom, struct protection_domain, domain);
 }
 
+static struct dma_ops_domain* to_dma_ops_domain(struct protection_domain *domain)
+{
+	BUG_ON(domain->flags != PD_DMA_OPS_MASK);
+	return container_of(domain, struct dma_ops_domain, domain);
+}
+
 static struct iommu_dev_data *alloc_dev_data(u16 devid)
 {
 	struct iommu_dev_data *dev_data;
@@ -391,43 +404,6 @@ static bool pdev_pri_erratum(struct pci_dev *pdev, u32 erratum)
 }
 
 /*
- * This function actually applies the mapping to the page table of the
- * dma_ops domain.
- */
-static void alloc_unity_mapping(struct dma_ops_domain *dma_dom,
-				struct unity_map_entry *e)
-{
-	u64 addr;
-
-	for (addr = e->address_start; addr < e->address_end;
-	     addr += PAGE_SIZE) {
-		if (addr < dma_dom->aperture_size)
-			__set_bit(addr >> PAGE_SHIFT,
-				  dma_dom->aperture[0]->bitmap);
-	}
-}
-
-/*
- * Inits the unity mappings required for a specific device
- */
-static void init_unity_mappings_for_device(struct device *dev,
-					   struct dma_ops_domain *dma_dom)
-{
-	struct unity_map_entry *e;
-	int devid;
-
-	devid = get_device_id(dev);
-	if (devid < 0)
-		return;
-
-	list_for_each_entry(e, &amd_iommu_unity_map, list) {
-		if (!(devid >= e->devid_start && devid <= e->devid_end))
-			continue;
-		alloc_unity_mapping(dma_dom, e);
-	}
-}
-
-/*
  * This function checks if the driver got a valid device from the caller to
  * avoid dereferencing invalid pointers.
  */
@@ -454,24 +430,12 @@ static bool check_device(struct device *dev)
 
 static void init_iommu_group(struct device *dev)
 {
-	struct dma_ops_domain *dma_domain;
-	struct iommu_domain *domain;
 	struct iommu_group *group;
 
 	group = iommu_group_get_for_dev(dev);
 	if (IS_ERR(group))
 		return;
 
-	domain = iommu_group_default_domain(group);
-	if (!domain)
-		goto out;
-
-	if (to_pdomain(domain)->flags == PD_DMA_OPS_MASK) {
-		dma_domain = to_pdomain(domain)->priv;
-		init_unity_mappings_for_device(dev, dma_domain);
-	}
-
-out:
 	iommu_group_put(group);
 }
 
@@ -1222,7 +1186,7 @@ static void domain_flush_complete(struct protection_domain *domain)
 	int i;
 
 	for (i = 0; i < amd_iommus_present; ++i) {
-		if (!domain->dev_iommu[i])
+		if (domain && !domain->dev_iommu[i])
 			continue;
 
 		/*
@@ -1399,8 +1363,9 @@ static u64 *fetch_pte(struct protection_domain *domain,
 static int iommu_map_page(struct protection_domain *dom,
 			  unsigned long bus_addr,
 			  unsigned long phys_addr,
+			  unsigned long page_size,
 			  int prot,
-			  unsigned long page_size)
+			  gfp_t gfp)
 {
 	u64 __pte, *pte;
 	int i, count;
@@ -1412,7 +1377,7 @@ static int iommu_map_page(struct protection_domain *dom,
 		return -EINVAL;
 
 	count = PAGE_SIZE_PTE_COUNT(page_size);
-	pte   = alloc_pte(dom, bus_addr, page_size, NULL, GFP_KERNEL);
+	pte   = alloc_pte(dom, bus_addr, page_size, NULL, gfp);
 
 	if (!pte)
 		return -ENOMEM;
@@ -1476,320 +1441,37 @@ static unsigned long iommu_unmap_page(struct protection_domain *dom,
 /****************************************************************************
  *
  * The next functions belong to the address allocator for the dma_ops
- * interface functions. They work like the allocators in the other IOMMU
- * drivers. Its basically a bitmap which marks the allocated pages in
- * the aperture. Maybe it could be enhanced in the future to a more
- * efficient allocator.
+ * interface functions.
  *
  ****************************************************************************/
 
-/*
- * The address allocator core functions.
- *
- * called with domain->lock held
- */
-
-/*
- * 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);
-	}
-}
-
-/*
- * This function is used to add a new aperture range to an existing
- * aperture in case of dma_ops domain allocation or address allocation
- * failure.
- */
-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;
-	unsigned long i, old_size, pte_pgsize;
-	struct aperture_range *range;
-	struct amd_iommu *iommu;
-	unsigned long flags;
-
-#ifdef CONFIG_IOMMU_STRESS
-	populate = false;
-#endif
-
-	if (index >= APERTURE_MAX_RANGES)
-		return -ENOMEM;
-
-	range = kzalloc(sizeof(struct aperture_range), gfp);
-	if (!range)
-		return -ENOMEM;
-
-	range->bitmap = (void *)get_zeroed_page(gfp);
-	if (!range->bitmap)
-		goto out_free;
-
-	range->offset = dma_dom->aperture_size;
-
-	spin_lock_init(&range->bitmap_lock);
-
-	if (populate) {
-		unsigned long address = dma_dom->aperture_size;
-		int i, num_ptes = APERTURE_RANGE_PAGES / 512;
-		u64 *pte, *pte_page;
-
-		for (i = 0; i < num_ptes; ++i) {
-			pte = alloc_pte(&dma_dom->domain, address, PAGE_SIZE,
-					&pte_page, gfp);
-			if (!pte)
-				goto out_free;
-
-			range->pte_pages[i] = pte_page;
-
-			address += APERTURE_RANGE_SIZE / 64;
-		}
-	}
-
-	spin_lock_irqsave(&dma_dom->domain.lock, flags);
-
-	/* First take the bitmap_lock and then publish the range */
-	spin_lock(&range->bitmap_lock);
-
-	old_size                 = dma_dom->aperture_size;
-	dma_dom->aperture[index] = range;
-	dma_dom->aperture_size  += APERTURE_RANGE_SIZE;
-
-	/* Reserve address range used for MSI messages */
-	if (old_size < MSI_ADDR_BASE_LO &&
-	    dma_dom->aperture_size > MSI_ADDR_BASE_LO) {
-		unsigned long spage;
-		int pages;
-
-		pages = iommu_num_pages(MSI_ADDR_BASE_LO, 0x10000, PAGE_SIZE);
-		spage = MSI_ADDR_BASE_LO >> PAGE_SHIFT;
-
-		dma_ops_reserve_addresses(dma_dom, spage, pages);
-	}
-
-	/* Initialize the exclusion range if necessary */
-	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);
-		}
-	}
-
-	/*
-	 * Check for areas already mapped as present in the new aperture
-	 * range and mark those pages as reserved in the allocator. Such
-	 * mappings may already exist as a result of requested unity
-	 * mappings for devices.
-	 */
-	for (i = dma_dom->aperture[index]->offset;
-	     i < dma_dom->aperture_size;
-	     i += pte_pgsize) {
-		u64 *pte = fetch_pte(&dma_dom->domain, i, &pte_pgsize);
-		if (!pte || !IOMMU_PTE_PRESENT(*pte))
-			continue;
-
-		dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT,
-					  pte_pgsize >> 12);
-	}
-
-	update_domain(&dma_dom->domain);
-
-	spin_unlock(&range->bitmap_lock);
-
-	spin_unlock_irqrestore(&dma_dom->domain.lock, flags);
-
-	return 0;
-
-out_free:
-	update_domain(&dma_dom->domain);
-
-	free_page((unsigned long)range->bitmap);
-
-	kfree(range);
-
-	return -ENOMEM;
-}
-
-static dma_addr_t dma_ops_aperture_alloc(struct dma_ops_domain *dom,
-					 struct aperture_range *range,
-					 unsigned long pages,
-					 unsigned long dma_mask,
-					 unsigned long boundary_size,
-					 unsigned long align_mask,
-					 bool trylock)
-{
-	unsigned long offset, limit, flags;
-	dma_addr_t address;
-	bool flush = false;
-
-	offset = range->offset >> PAGE_SHIFT;
-	limit  = iommu_device_max_index(APERTURE_RANGE_PAGES, offset,
-					dma_mask >> PAGE_SHIFT);
-
-	if (trylock) {
-		if (!spin_trylock_irqsave(&range->bitmap_lock, flags))
-			return -1;
-	} else {
-		spin_lock_irqsave(&range->bitmap_lock, flags);
-	}
-
-	address = iommu_area_alloc(range->bitmap, limit, range->next_bit,
-				   pages, offset, boundary_size, align_mask);
-	if (address == -1) {
-		/* Nothing found, retry one time */
-		address = iommu_area_alloc(range->bitmap, limit,
-					   0, pages, offset, boundary_size,
-					   align_mask);
-		flush = true;
-	}
-
-	if (address != -1)
-		range->next_bit = address + pages;
-
-	spin_unlock_irqrestore(&range->bitmap_lock, flags);
-
-	if (flush) {
-		domain_flush_tlb(&dom->domain);
-		domain_flush_complete(&dom->domain);
-	}
-
-	return address;
-}
-
-static unsigned long dma_ops_area_alloc(struct device *dev,
-					struct dma_ops_domain *dom,
-					unsigned int pages,
-					unsigned long align_mask,
-					u64 dma_mask)
-{
-	unsigned long boundary_size, mask;
-	unsigned long address = -1;
-	bool first = true;
-	u32 start, i;
-
-	preempt_disable();
-
-	mask = dma_get_seg_boundary(dev);
-
-again:
-	start = this_cpu_read(*dom->next_index);
-
-	/* Sanity check - is it really necessary? */
-	if (unlikely(start > APERTURE_MAX_RANGES)) {
-		start = 0;
-		this_cpu_write(*dom->next_index, 0);
-	}
-
-	boundary_size = mask + 1 ? ALIGN(mask + 1, PAGE_SIZE) >> PAGE_SHIFT :
-				   1UL << (BITS_PER_LONG - PAGE_SHIFT);
-
-	for (i = 0; i < APERTURE_MAX_RANGES; ++i) {
-		struct aperture_range *range;
-		int index;
-
-		index = (start + i) % APERTURE_MAX_RANGES;
-
-		range = dom->aperture[index];
-
-		if (!range || range->offset >= dma_mask)
-			continue;
-
-		address = dma_ops_aperture_alloc(dom, range, pages,
-						 dma_mask, boundary_size,
-						 align_mask, first);
-		if (address != -1) {
-			address = range->offset + (address << PAGE_SHIFT);
-			this_cpu_write(*dom->next_index, index);
-			break;
-		}
-	}
-
-	if (address == -1 && first) {
-		first = false;
-		goto again;
-	}
 
-	preempt_enable();
-
-	return address;
-}
-
-static unsigned long dma_ops_alloc_addresses(struct device *dev,
-					     struct dma_ops_domain *dom,
-					     unsigned int pages,
-					     unsigned long align_mask,
-					     u64 dma_mask)
+static unsigned long dma_ops_alloc_iova(struct device *dev,
+					struct dma_ops_domain *dma_dom,
+					unsigned int pages, u64 dma_mask)
 {
-	unsigned long address = -1;
+	unsigned long pfn = 0;
 
-	while (address == -1) {
-		address = dma_ops_area_alloc(dev, dom, pages,
-					     align_mask, dma_mask);
-
-		if (address == -1 && alloc_new_range(dom, false, GFP_ATOMIC))
-			break;
-	}
+	pages = __roundup_pow_of_two(pages);
 
-	if (unlikely(address == -1))
-		address = DMA_ERROR_CODE;
+	if (dma_mask > DMA_BIT_MASK(32))
+		pfn = alloc_iova_fast(&dma_dom->iovad, pages,
+				      IOVA_PFN(DMA_BIT_MASK(32)));
 
-	WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size);
+	if (!pfn)
+		pfn = alloc_iova_fast(&dma_dom->iovad, pages, IOVA_PFN(dma_mask));
 
-	return address;
+	return (pfn << PAGE_SHIFT);
 }
 
-/*
- * The address free function.
- *
- * called with domain->lock held
- */
-static void dma_ops_free_addresses(struct dma_ops_domain *dom,
-				   unsigned long address,
-				   unsigned int pages)
+static void dma_ops_free_iova(struct dma_ops_domain *dma_dom,
+			      unsigned long address,
+			      unsigned int pages)
 {
-	unsigned i = address >> APERTURE_RANGE_SHIFT;
-	struct aperture_range *range = dom->aperture[i];
-	unsigned long flags;
-
-	BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL);
-
-#ifdef CONFIG_IOMMU_STRESS
-	if (i < 4)
-		return;
-#endif
-
-	if (amd_iommu_unmap_flush) {
-		domain_flush_tlb(&dom->domain);
-		domain_flush_complete(&dom->domain);
-	}
-
-	address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT;
-
-	spin_lock_irqsave(&range->bitmap_lock, flags);
-	if (address + pages > range->next_bit)
-		range->next_bit = address + pages;
-	bitmap_clear(range->bitmap, address, pages);
-	spin_unlock_irqrestore(&range->bitmap_lock, flags);
+	pages = __roundup_pow_of_two(pages);
+	address >>= PAGE_SHIFT;
 
+	free_iova_fast(&dma_dom->iovad, address, pages);
 }
 
 /****************************************************************************
@@ -1963,44 +1645,18 @@ static void free_gcr3_table(struct protection_domain *domain)
  */
 static void dma_ops_domain_free(struct dma_ops_domain *dom)
 {
-	int i;
-
 	if (!dom)
 		return;
 
-	free_percpu(dom->next_index);
-
 	del_domain_from_list(&dom->domain);
 
-	free_pagetable(&dom->domain);
+	put_iova_domain(&dom->iovad);
 
-	for (i = 0; i < APERTURE_MAX_RANGES; ++i) {
-		if (!dom->aperture[i])
-			continue;
-		free_page((unsigned long)dom->aperture[i]->bitmap);
-		kfree(dom->aperture[i]);
-	}
+	free_pagetable(&dom->domain);
 
 	kfree(dom);
 }
 
-static int dma_ops_domain_alloc_apertures(struct dma_ops_domain *dma_dom,
-					  int max_apertures)
-{
-	int ret, i, apertures;
-
-	apertures = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
-	ret       = 0;
-
-	for (i = apertures; i < max_apertures; ++i) {
-		ret = alloc_new_range(dma_dom, false, GFP_KERNEL);
-		if (ret)
-			break;
-	}
-
-	return ret;
-}
-
 /*
  * Allocates a new protection domain usable for the dma_ops functions.
  * It also initializes the page table and the address allocator data
@@ -2009,7 +1665,6 @@ static int dma_ops_domain_alloc_apertures(struct dma_ops_domain *dma_dom,
 static struct dma_ops_domain *dma_ops_domain_alloc(void)
 {
 	struct dma_ops_domain *dma_dom;
-	int cpu;
 
 	dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL);
 	if (!dma_dom)
@@ -2018,30 +1673,19 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void)
 	if (protection_domain_init(&dma_dom->domain))
 		goto free_dma_dom;
 
-	dma_dom->next_index = alloc_percpu(u32);
-	if (!dma_dom->next_index)
-		goto free_dma_dom;
-
-	dma_dom->domain.mode = PAGE_MODE_2_LEVEL;
+	dma_dom->domain.mode = PAGE_MODE_3_LEVEL;
 	dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL);
 	dma_dom->domain.flags = PD_DMA_OPS_MASK;
-	dma_dom->domain.priv = dma_dom;
 	if (!dma_dom->domain.pt_root)
 		goto free_dma_dom;
 
-	add_domain_to_list(&dma_dom->domain);
-
-	if (alloc_new_range(dma_dom, true, GFP_KERNEL))
-		goto free_dma_dom;
+	init_iova_domain(&dma_dom->iovad, PAGE_SIZE,
+			 IOVA_START_PFN, DMA_32BIT_PFN);
 
-	/*
-	 * mark the first page as allocated so we never return 0 as
-	 * a valid dma-address. So we can use 0 as error value
-	 */
-	dma_dom->aperture[0]->bitmap[0] = 1;
+	/* Initialize reserved ranges */
+	copy_reserved_iova(&reserved_iova_ranges, &dma_dom->iovad);
 
-	for_each_possible_cpu(cpu)
-		*per_cpu_ptr(dma_dom->next_index, cpu) = 0;
+	add_domain_to_list(&dma_dom->domain);
 
 	return dma_dom;
 
@@ -2484,6 +2128,92 @@ static struct iommu_group *amd_iommu_device_group(struct device *dev)
  *
  *****************************************************************************/
 
+static void __queue_flush(struct flush_queue *queue)
+{
+	struct protection_domain *domain;
+	unsigned long flags;
+	int idx;
+
+	/* First flush TLB of all known domains */
+	spin_lock_irqsave(&amd_iommu_pd_lock, flags);
+	list_for_each_entry(domain, &amd_iommu_pd_list, list)
+		domain_flush_tlb(domain);
+	spin_unlock_irqrestore(&amd_iommu_pd_lock, flags);
+
+	/* Wait until flushes have completed */
+	domain_flush_complete(NULL);
+
+	for (idx = 0; idx < queue->next; ++idx) {
+		struct flush_queue_entry *entry;
+
+		entry = queue->entries + idx;
+
+		free_iova_fast(&entry->dma_dom->iovad,
+				entry->iova_pfn,
+				entry->pages);
+
+		/* Not really necessary, just to make sure we catch any bugs */
+		entry->dma_dom = NULL;
+	}
+
+	queue->next = 0;
+}
+
+static void queue_flush_all(void)
+{
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		struct flush_queue *queue;
+		unsigned long flags;
+
+		queue = per_cpu_ptr(&flush_queue, cpu);
+		spin_lock_irqsave(&queue->lock, flags);
+		if (queue->next > 0)
+			__queue_flush(queue);
+		spin_unlock_irqrestore(&queue->lock, flags);
+	}
+}
+
+static void queue_flush_timeout(unsigned long unsused)
+{
+	atomic_set(&queue_timer_on, 0);
+	queue_flush_all();
+}
+
+static void queue_add(struct dma_ops_domain *dma_dom,
+		      unsigned long address, unsigned long pages)
+{
+	struct flush_queue_entry *entry;
+	struct flush_queue *queue;
+	unsigned long flags;
+	int idx;
+
+	pages     = __roundup_pow_of_two(pages);
+	address >>= PAGE_SHIFT;
+
+	queue = get_cpu_ptr(&flush_queue);
+	spin_lock_irqsave(&queue->lock, flags);
+
+	if (queue->next == FLUSH_QUEUE_SIZE)
+		__queue_flush(queue);
+
+	idx   = queue->next++;
+	entry = queue->entries + idx;
+
+	entry->iova_pfn = address;
+	entry->pages    = pages;
+	entry->dma_dom  = dma_dom;
+
+	spin_unlock_irqrestore(&queue->lock, flags);
+
+	if (atomic_cmpxchg(&queue_timer_on, 0, 1) == 0)
+		mod_timer(&queue_timer, jiffies + msecs_to_jiffies(10));
+
+	put_cpu_ptr(&flush_queue);
+}
+
+
 /*
  * In the dma_ops path we only have the struct device. This function
  * finds the corresponding IOMMU, the protection domain and the
@@ -2494,16 +2224,11 @@ static struct iommu_group *amd_iommu_device_group(struct device *dev)
 static struct protection_domain *get_domain(struct device *dev)
 {
 	struct protection_domain *domain;
-	struct iommu_domain *io_domain;
 
 	if (!check_device(dev))
 		return ERR_PTR(-EINVAL);
 
-	io_domain = iommu_get_domain_for_dev(dev);
-	if (!io_domain)
-		return NULL;
-
-	domain = to_pdomain(io_domain);
+	domain = get_dev_data(dev)->domain;
 	if (!dma_ops_domain(domain))
 		return ERR_PTR(-EBUSY);
 
@@ -2538,94 +2263,17 @@ static void update_domain(struct protection_domain *domain)
 	domain->updated = false;
 }
 
-/*
- * This function fetches the PTE for a given address in the aperture
- */
-static u64* dma_ops_get_pte(struct dma_ops_domain *dom,
-			    unsigned long address)
+static int dir2prot(enum dma_data_direction direction)
 {
-	struct aperture_range *aperture;
-	u64 *pte, *pte_page;
-
-	aperture = dom->aperture[APERTURE_RANGE_INDEX(address)];
-	if (!aperture)
-		return NULL;
-
-	pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)];
-	if (!pte) {
-		pte = alloc_pte(&dom->domain, address, PAGE_SIZE, &pte_page,
-				GFP_ATOMIC);
-		aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page;
-	} else
-		pte += PM_LEVEL_INDEX(0, address);
-
-	update_domain(&dom->domain);
-
-	return pte;
-}
-
-/*
- * 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 dma_ops_domain *dom,
-				     unsigned long address,
-				     phys_addr_t paddr,
-				     int direction)
-{
-	u64 *pte, __pte;
-
-	WARN_ON(address > dom->aperture_size);
-
-	paddr &= PAGE_MASK;
-
-	pte  = dma_ops_get_pte(dom, address);
-	if (!pte)
-		return DMA_ERROR_CODE;
-
-	__pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC;
-
 	if (direction == DMA_TO_DEVICE)
-		__pte |= IOMMU_PTE_IR;
+		return IOMMU_PROT_IR;
 	else if (direction == DMA_FROM_DEVICE)
-		__pte |= IOMMU_PTE_IW;
+		return IOMMU_PROT_IW;
 	else if (direction == DMA_BIDIRECTIONAL)
-		__pte |= IOMMU_PTE_IR | IOMMU_PTE_IW;
-
-	WARN_ON_ONCE(*pte);
-
-	*pte = __pte;
-
-	return (dma_addr_t)address;
-}
-
-/*
- * The generic unmapping function for on page in the DMA address space.
- */
-static void dma_ops_domain_unmap(struct dma_ops_domain *dom,
-				 unsigned long address)
-{
-	struct aperture_range *aperture;
-	u64 *pte;
-
-	if (address >= dom->aperture_size)
-		return;
-
-	aperture = dom->aperture[APERTURE_RANGE_INDEX(address)];
-	if (!aperture)
-		return;
-
-	pte  = aperture->pte_pages[APERTURE_PAGE_INDEX(address)];
-	if (!pte)
-		return;
-
-	pte += PM_LEVEL_INDEX(0, address);
-
-	WARN_ON_ONCE(!*pte);
-
-	*pte = 0ULL;
+		return IOMMU_PROT_IW | IOMMU_PROT_IR;
+	else
+		return 0;
 }
-
 /*
  * This function contains common code for mapping of a physically
  * contiguous memory region into DMA address space. It is used by all
@@ -2636,32 +2284,29 @@ static dma_addr_t __map_single(struct device *dev,
 			       struct dma_ops_domain *dma_dom,
 			       phys_addr_t paddr,
 			       size_t size,
-			       int dir,
-			       bool align,
+			       enum dma_data_direction direction,
 			       u64 dma_mask)
 {
 	dma_addr_t offset = paddr & ~PAGE_MASK;
 	dma_addr_t address, start, ret;
 	unsigned int pages;
-	unsigned long align_mask = 0;
+	int prot = 0;
 	int i;
 
 	pages = iommu_num_pages(paddr, size, PAGE_SIZE);
 	paddr &= PAGE_MASK;
 
-	if (align)
-		align_mask = (1UL << get_order(size)) - 1;
-
-	address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask,
-					  dma_mask);
-
+	address = dma_ops_alloc_iova(dev, dma_dom, pages, dma_mask);
 	if (address == DMA_ERROR_CODE)
 		goto out;
 
+	prot = dir2prot(direction);
+
 	start = address;
 	for (i = 0; i < pages; ++i) {
-		ret = dma_ops_domain_map(dma_dom, start, paddr, dir);
-		if (ret == DMA_ERROR_CODE)
+		ret = iommu_map_page(&dma_dom->domain, start, paddr,
+				     PAGE_SIZE, prot, GFP_ATOMIC);
+		if (ret)
 			goto out_unmap;
 
 		paddr += PAGE_SIZE;
@@ -2681,10 +2326,13 @@ out_unmap:
 
 	for (--i; i >= 0; --i) {
 		start -= PAGE_SIZE;
-		dma_ops_domain_unmap(dma_dom, start);
+		iommu_unmap_page(&dma_dom->domain, start, PAGE_SIZE);
 	}
 
-	dma_ops_free_addresses(dma_dom, address, pages);
+	domain_flush_tlb(&dma_dom->domain);
+	domain_flush_complete(&dma_dom->domain);
+
+	dma_ops_free_iova(dma_dom, address, pages);
 
 	return DMA_ERROR_CODE;
 }
@@ -2702,21 +2350,23 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
 	dma_addr_t i, start;
 	unsigned int pages;
 
-	if ((dma_addr == DMA_ERROR_CODE) ||
-	    (dma_addr + size > dma_dom->aperture_size))
-		return;
-
 	flush_addr = dma_addr;
 	pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
 	dma_addr &= PAGE_MASK;
 	start = dma_addr;
 
 	for (i = 0; i < pages; ++i) {
-		dma_ops_domain_unmap(dma_dom, start);
+		iommu_unmap_page(&dma_dom->domain, start, PAGE_SIZE);
 		start += PAGE_SIZE;
 	}
 
-	dma_ops_free_addresses(dma_dom, dma_addr, pages);
+	if (amd_iommu_unmap_flush) {
+		dma_ops_free_iova(dma_dom, dma_addr, pages);
+		domain_flush_tlb(&dma_dom->domain);
+		domain_flush_complete(&dma_dom->domain);
+	} else {
+		queue_add(dma_dom, dma_addr, pages);
+	}
 }
 
 /*
@@ -2725,10 +2375,11 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
 static dma_addr_t map_page(struct device *dev, struct page *page,
 			   unsigned long offset, size_t size,
 			   enum dma_data_direction dir,
-			   struct dma_attrs *attrs)
+			   unsigned long attrs)
 {
 	phys_addr_t paddr = page_to_phys(page) + offset;
 	struct protection_domain *domain;
+	struct dma_ops_domain *dma_dom;
 	u64 dma_mask;
 
 	domain = get_domain(dev);
@@ -2738,24 +2389,53 @@ static dma_addr_t map_page(struct device *dev, struct page *page,
 		return DMA_ERROR_CODE;
 
 	dma_mask = *dev->dma_mask;
+	dma_dom = to_dma_ops_domain(domain);
 
-	return __map_single(dev, domain->priv, paddr, size, dir, false,
-			    dma_mask);
+	return __map_single(dev, dma_dom, paddr, size, dir, dma_mask);
 }
 
 /*
  * The exported unmap_single function for dma_ops.
  */
 static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
-		       enum dma_data_direction dir, struct dma_attrs *attrs)
+		       enum dma_data_direction dir, unsigned long attrs)
 {
 	struct protection_domain *domain;
+	struct dma_ops_domain *dma_dom;
 
 	domain = get_domain(dev);
 	if (IS_ERR(domain))
 		return;
 
-	__unmap_single(domain->priv, dma_addr, size, dir);
+	dma_dom = to_dma_ops_domain(domain);
+
+	__unmap_single(dma_dom, dma_addr, size, dir);
+}
+
+static int sg_num_pages(struct device *dev,
+			struct scatterlist *sglist,
+			int nelems)
+{
+	unsigned long mask, boundary_size;
+	struct scatterlist *s;
+	int i, npages = 0;
+
+	mask          = dma_get_seg_boundary(dev);
+	boundary_size = mask + 1 ? ALIGN(mask + 1, PAGE_SIZE) >> PAGE_SHIFT :
+				   1UL << (BITS_PER_LONG - PAGE_SHIFT);
+
+	for_each_sg(sglist, s, nelems, i) {
+		int p, n;
+
+		s->dma_address = npages << PAGE_SHIFT;
+		p = npages % boundary_size;
+		n = iommu_num_pages(sg_phys(s), s->length, PAGE_SIZE);
+		if (p + n > boundary_size)
+			npages += boundary_size - p;
+		npages += n;
+	}
+
+	return npages;
 }
 
 /*
@@ -2763,46 +2443,79 @@ static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
  * lists).
  */
 static int map_sg(struct device *dev, struct scatterlist *sglist,
-		  int nelems, enum dma_data_direction dir,
-		  struct dma_attrs *attrs)
+		  int nelems, enum dma_data_direction direction,
+		  unsigned long attrs)
 {
+	int mapped_pages = 0, npages = 0, prot = 0, i;
 	struct protection_domain *domain;
-	int i;
+	struct dma_ops_domain *dma_dom;
 	struct scatterlist *s;
-	phys_addr_t paddr;
-	int mapped_elems = 0;
+	unsigned long address;
 	u64 dma_mask;
 
 	domain = get_domain(dev);
 	if (IS_ERR(domain))
 		return 0;
 
+	dma_dom  = to_dma_ops_domain(domain);
 	dma_mask = *dev->dma_mask;
 
+	npages = sg_num_pages(dev, sglist, nelems);
+
+	address = dma_ops_alloc_iova(dev, dma_dom, npages, dma_mask);
+	if (address == DMA_ERROR_CODE)
+		goto out_err;
+
+	prot = dir2prot(direction);
+
+	/* Map all sg entries */
 	for_each_sg(sglist, s, nelems, i) {
-		paddr = sg_phys(s);
+		int j, pages = iommu_num_pages(sg_phys(s), s->length, PAGE_SIZE);
 
-		s->dma_address = __map_single(dev, domain->priv,
-					      paddr, s->length, dir, false,
-					      dma_mask);
+		for (j = 0; j < pages; ++j) {
+			unsigned long bus_addr, phys_addr;
+			int ret;
 
-		if (s->dma_address) {
-			s->dma_length = s->length;
-			mapped_elems++;
-		} else
-			goto unmap;
+			bus_addr  = address + s->dma_address + (j << PAGE_SHIFT);
+			phys_addr = (sg_phys(s) & PAGE_MASK) + (j << PAGE_SHIFT);
+			ret = iommu_map_page(domain, bus_addr, phys_addr, PAGE_SIZE, prot, GFP_ATOMIC);
+			if (ret)
+				goto out_unmap;
+
+			mapped_pages += 1;
+		}
+	}
+
+	/* Everything is mapped - write the right values into s->dma_address */
+	for_each_sg(sglist, s, nelems, i) {
+		s->dma_address += address + s->offset;
+		s->dma_length   = s->length;
 	}
 
-	return mapped_elems;
+	return nelems;
+
+out_unmap:
+	pr_err("%s: IOMMU mapping error in map_sg (io-pages: %d)\n",
+	       dev_name(dev), npages);
+
+	for_each_sg(sglist, s, nelems, i) {
+		int j, pages = iommu_num_pages(sg_phys(s), s->length, PAGE_SIZE);
+
+		for (j = 0; j < pages; ++j) {
+			unsigned long bus_addr;
+
+			bus_addr  = address + s->dma_address + (j << PAGE_SHIFT);
+			iommu_unmap_page(domain, bus_addr, PAGE_SIZE);
 
-unmap:
-	for_each_sg(sglist, s, mapped_elems, i) {
-		if (s->dma_address)
-			__unmap_single(domain->priv, s->dma_address,
-				       s->dma_length, dir);
-		s->dma_address = s->dma_length = 0;
+			if (--mapped_pages)
+				goto out_free_iova;
+		}
 	}
 
+out_free_iova:
+	free_iova_fast(&dma_dom->iovad, address, npages);
+
+out_err:
 	return 0;
 }
 
@@ -2812,21 +2525,22 @@ unmap:
  */
 static void unmap_sg(struct device *dev, struct scatterlist *sglist,
 		     int nelems, enum dma_data_direction dir,
-		     struct dma_attrs *attrs)
+		     unsigned long attrs)
 {
 	struct protection_domain *domain;
-	struct scatterlist *s;
-	int i;
+	struct dma_ops_domain *dma_dom;
+	unsigned long startaddr;
+	int npages = 2;
 
 	domain = get_domain(dev);
 	if (IS_ERR(domain))
 		return;
 
-	for_each_sg(sglist, s, nelems, i) {
-		__unmap_single(domain->priv, s->dma_address,
-			       s->dma_length, dir);
-		s->dma_address = s->dma_length = 0;
-	}
+	startaddr = sg_dma_address(sglist) & PAGE_MASK;
+	dma_dom   = to_dma_ops_domain(domain);
+	npages    = sg_num_pages(dev, sglist, nelems);
+
+	__unmap_single(dma_dom, startaddr, npages << PAGE_SHIFT, dir);
 }
 
 /*
@@ -2834,10 +2548,11 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist,
  */
 static void *alloc_coherent(struct device *dev, size_t size,
 			    dma_addr_t *dma_addr, gfp_t flag,
-			    struct dma_attrs *attrs)
+			    unsigned long attrs)
 {
 	u64 dma_mask = dev->coherent_dma_mask;
 	struct protection_domain *domain;
+	struct dma_ops_domain *dma_dom;
 	struct page *page;
 
 	domain = get_domain(dev);
@@ -2848,6 +2563,7 @@ static void *alloc_coherent(struct device *dev, size_t size,
 	} else if (IS_ERR(domain))
 		return NULL;
 
+	dma_dom   = to_dma_ops_domain(domain);
 	size	  = PAGE_ALIGN(size);
 	dma_mask  = dev->coherent_dma_mask;
 	flag     &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
@@ -2867,8 +2583,8 @@ static void *alloc_coherent(struct device *dev, size_t size,
 	if (!dma_mask)
 		dma_mask = *dev->dma_mask;
 
-	*dma_addr = __map_single(dev, domain->priv, page_to_phys(page),
-				 size, DMA_BIDIRECTIONAL, true, dma_mask);
+	*dma_addr = __map_single(dev, dma_dom, page_to_phys(page),
+				 size, DMA_BIDIRECTIONAL, dma_mask);
 
 	if (*dma_addr == DMA_ERROR_CODE)
 		goto out_free;
@@ -2888,9 +2604,10 @@ out_free:
  */
 static void free_coherent(struct device *dev, size_t size,
 			  void *virt_addr, dma_addr_t dma_addr,
-			  struct dma_attrs *attrs)
+			  unsigned long attrs)
 {
 	struct protection_domain *domain;
+	struct dma_ops_domain *dma_dom;
 	struct page *page;
 
 	page = virt_to_page(virt_addr);
@@ -2900,7 +2617,9 @@ static void free_coherent(struct device *dev, size_t size,
 	if (IS_ERR(domain))
 		goto free_mem;
 
-	__unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL);
+	dma_dom = to_dma_ops_domain(domain);
+
+	__unmap_single(dma_dom, dma_addr, size, DMA_BIDIRECTIONAL);
 
 free_mem:
 	if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT))
@@ -2916,48 +2635,92 @@ static int amd_iommu_dma_supported(struct device *dev, u64 mask)
 	return check_device(dev);
 }
 
-static int set_dma_mask(struct device *dev, u64 mask)
+static struct dma_map_ops amd_iommu_dma_ops = {
+	.alloc		= alloc_coherent,
+	.free		= free_coherent,
+	.map_page	= map_page,
+	.unmap_page	= unmap_page,
+	.map_sg		= map_sg,
+	.unmap_sg	= unmap_sg,
+	.dma_supported	= amd_iommu_dma_supported,
+};
+
+static int init_reserved_iova_ranges(void)
 {
-	struct protection_domain *domain;
-	int max_apertures = 1;
+	struct pci_dev *pdev = NULL;
+	struct iova *val;
 
-	domain = get_domain(dev);
-	if (IS_ERR(domain))
-		return PTR_ERR(domain);
+	init_iova_domain(&reserved_iova_ranges, PAGE_SIZE,
+			 IOVA_START_PFN, DMA_32BIT_PFN);
 
-	if (mask == DMA_BIT_MASK(64))
-		max_apertures = 8;
-	else if (mask > DMA_BIT_MASK(32))
-		max_apertures = 4;
+	lockdep_set_class(&reserved_iova_ranges.iova_rbtree_lock,
+			  &reserved_rbtree_key);
+
+	/* MSI memory range */
+	val = reserve_iova(&reserved_iova_ranges,
+			   IOVA_PFN(MSI_RANGE_START), IOVA_PFN(MSI_RANGE_END));
+	if (!val) {
+		pr_err("Reserving MSI range failed\n");
+		return -ENOMEM;
+	}
+
+	/* HT memory range */
+	val = reserve_iova(&reserved_iova_ranges,
+			   IOVA_PFN(HT_RANGE_START), IOVA_PFN(HT_RANGE_END));
+	if (!val) {
+		pr_err("Reserving HT range failed\n");
+		return -ENOMEM;
+	}
 
 	/*
-	 * To prevent lock contention it doesn't make sense to allocate more
-	 * apertures than online cpus
+	 * Memory used for PCI resources
+	 * FIXME: Check whether we can reserve the PCI-hole completly
 	 */
-	if (max_apertures > num_online_cpus())
-		max_apertures = num_online_cpus();
+	for_each_pci_dev(pdev) {
+		int i;
 
-	if (dma_ops_domain_alloc_apertures(domain->priv, max_apertures))
-		dev_err(dev, "Can't allocate %d iommu apertures\n",
-			max_apertures);
+		for (i = 0; i < PCI_NUM_RESOURCES; ++i) {
+			struct resource *r = &pdev->resource[i];
+
+			if (!(r->flags & IORESOURCE_MEM))
+				continue;
+
+			val = reserve_iova(&reserved_iova_ranges,
+					   IOVA_PFN(r->start),
+					   IOVA_PFN(r->end));
+			if (!val) {
+				pr_err("Reserve pci-resource range failed\n");
+				return -ENOMEM;
+			}
+		}
+	}
 
 	return 0;
 }
 
-static struct dma_map_ops amd_iommu_dma_ops = {
-	.alloc		= alloc_coherent,
-	.free		= free_coherent,
-	.map_page	= map_page,
-	.unmap_page	= unmap_page,
-	.map_sg		= map_sg,
-	.unmap_sg	= unmap_sg,
-	.dma_supported	= amd_iommu_dma_supported,
-	.set_dma_mask	= set_dma_mask,
-};
-
 int __init amd_iommu_init_api(void)
 {
-	int err = 0;
+	int ret, cpu, err = 0;
+
+	ret = iova_cache_get();
+	if (ret)
+		return ret;
+
+	ret = init_reserved_iova_ranges();
+	if (ret)
+		return ret;
+
+	for_each_possible_cpu(cpu) {
+		struct flush_queue *queue = per_cpu_ptr(&flush_queue, cpu);
+
+		queue->entries = kzalloc(FLUSH_QUEUE_SIZE *
+					 sizeof(*queue->entries),
+					 GFP_KERNEL);
+		if (!queue->entries)
+			goto out_put_iova;
+
+		spin_lock_init(&queue->lock);
+	}
 
 	err = bus_set_iommu(&pci_bus_type, &amd_iommu_ops);
 	if (err)
@@ -2967,11 +2730,26 @@ int __init amd_iommu_init_api(void)
 	if (err)
 		return err;
 #endif
+	err = bus_set_iommu(&platform_bus_type, &amd_iommu_ops);
+	if (err)
+		return err;
 	return 0;
+
+out_put_iova:
+	for_each_possible_cpu(cpu) {
+		struct flush_queue *queue = per_cpu_ptr(&flush_queue, cpu);
+
+		kfree(queue->entries);
+	}
+
+	return -ENOMEM;
 }
 
 int __init amd_iommu_init_dma_ops(void)
 {
+	setup_timer(&queue_timer, queue_flush_timeout, 0);
+	atomic_set(&queue_timer_on, 0);
+
 	swiotlb        = iommu_pass_through ? 1 : 0;
 	iommu_detected = 1;
 
@@ -2990,6 +2768,7 @@ int __init amd_iommu_init_dma_ops(void)
 		pr_info("AMD-Vi: Lazy IO/TLB flushing enabled\n");
 
 	return 0;
+
 }
 
 /*****************************************************************************
@@ -3126,7 +2905,14 @@ static void amd_iommu_domain_free(struct iommu_domain *dom)
 
 	switch (dom->type) {
 	case IOMMU_DOMAIN_DMA:
-		dma_dom = domain->priv;
+		/*
+		 * First make sure the domain is no longer referenced from the
+		 * flush queue
+		 */
+		queue_flush_all();
+
+		/* Now release the domain */
+		dma_dom = to_dma_ops_domain(domain);
 		dma_ops_domain_free(dma_dom);
 		break;
 	default:
@@ -3208,7 +2994,7 @@ static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
 		prot |= IOMMU_PROT_IW;
 
 	mutex_lock(&domain->api_lock);
-	ret = iommu_map_page(domain, iova, paddr, prot, page_size);
+	ret = iommu_map_page(domain, iova, paddr, page_size, prot, GFP_KERNEL);
 	mutex_unlock(&domain->api_lock);
 
 	return ret;
@@ -3310,6 +3096,19 @@ static void amd_iommu_put_dm_regions(struct device *dev,
 		kfree(entry);
 }
 
+static void amd_iommu_apply_dm_region(struct device *dev,
+				      struct iommu_domain *domain,
+				      struct iommu_dm_region *region)
+{
+	struct dma_ops_domain *dma_dom = to_dma_ops_domain(to_pdomain(domain));
+	unsigned long start, end;
+
+	start = IOVA_PFN(region->start);
+	end   = IOVA_PFN(region->start + region->length);
+
+	WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL);
+}
+
 static const struct iommu_ops amd_iommu_ops = {
 	.capable = amd_iommu_capable,
 	.domain_alloc = amd_iommu_domain_alloc,
@@ -3325,6 +3124,7 @@ static const struct iommu_ops amd_iommu_ops = {
 	.device_group = amd_iommu_device_group,
 	.get_dm_regions = amd_iommu_get_dm_regions,
 	.put_dm_regions = amd_iommu_put_dm_regions,
+	.apply_dm_region = amd_iommu_apply_dm_region,
 	.pgsize_bitmap	= AMD_IOMMU_PGSIZES,
 };