1 files changed, 24 insertions, 12 deletions

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index c5ef1af8e79d..8467ec2320f1 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -7,6 +7,7 @@
 #include <asm/dma.h>
 #include <asm/gart.h>
 #include <asm/calgary.h>
+#include <asm/amd_iommu.h>
 
 int forbid_dac __read_mostly;
 EXPORT_SYMBOL(forbid_dac);
@@ -74,13 +75,17 @@ early_param("dma32_size", parse_dma32_size_opt);
 void __init dma32_reserve_bootmem(void)
 {
         unsigned long size, align;
-        if (end_pfn <= MAX_DMA32_PFN)
+        if (max_pfn <= MAX_DMA32_PFN)
                 return;
 
+        /*
+         * check aperture_64.c allocate_aperture() for reason about
+         * using 512M as goal
+         */
         align = 64ULL<<20;
         size = round_up(dma32_bootmem_size, align);
         dma32_bootmem_ptr = __alloc_bootmem_nopanic(size, align,
-                                 __pa(MAX_DMA_ADDRESS));
+                                 512ULL<<20);
         if (dma32_bootmem_ptr)
                 dma32_bootmem_size = size;
         else
@@ -88,17 +93,14 @@ void __init dma32_reserve_bootmem(void)
 }
 static void __init dma32_free_bootmem(void)
 {
-        int node;
 
-        if (end_pfn <= MAX_DMA32_PFN)
+        if (max_pfn <= MAX_DMA32_PFN)
                 return;
 
         if (!dma32_bootmem_ptr)
                 return;
 
-        for_each_online_node(node)
-                free_bootmem_node(NODE_DATA(node), __pa(dma32_bootmem_ptr),
-                                  dma32_bootmem_size);
+        free_bootmem(__pa(dma32_bootmem_ptr), dma32_bootmem_size);
 
         dma32_bootmem_ptr = NULL;
         dma32_bootmem_size = 0;
@@ -122,6 +124,8 @@ void __init pci_iommu_alloc(void)
 
         detect_intel_iommu();
 
+        amd_iommu_detect();
+
 #ifdef CONFIG_SWIOTLB
         pci_swiotlb_init();
 #endif
@@ -357,7 +361,7 @@ int dma_supported(struct device *dev, u64 mask)
 EXPORT_SYMBOL(dma_supported);
 
 /* Allocate DMA memory on node near device */
-noinline struct page *
+static noinline struct page *
 dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order)
 {
         int node;
@@ -378,6 +382,7 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
         struct page *page;
         unsigned long dma_mask = 0;
         dma_addr_t bus;
+        int noretry = 0;
 
         /* ignore region specifiers */
         gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
@@ -397,20 +402,25 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
         if (dev->dma_mask == NULL)
                 return NULL;
 
-        /* Don't invoke OOM killer */
-        gfp |= __GFP_NORETRY;
+        /* Don't invoke OOM killer or retry in lower 16MB DMA zone */
+        if (gfp & __GFP_DMA)
+                noretry = 1;
 
 #ifdef CONFIG_X86_64
         /* Why <=? Even when the mask is smaller than 4GB it is often
            larger than 16MB and in this case we have a chance of
            finding fitting memory in the next higher zone first. If
            not retry with true GFP_DMA. -AK */
-        if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA))
+        if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) {
                 gfp |= GFP_DMA32;
+                if (dma_mask < DMA_32BIT_MASK)
+                        noretry = 1;
+        }
 #endif
 
  again:
-        page = dma_alloc_pages(dev, gfp, get_order(size));
+        page = dma_alloc_pages(dev,
+                noretry ? gfp | __GFP_NORETRY : gfp, get_order(size));
         if (page == NULL)
                 return NULL;
 
@@ -496,6 +506,8 @@ static int __init pci_iommu_init(void)
 
         intel_iommu_init();
 
+        amd_iommu_init();
+
 #ifdef CONFIG_GART_IOMMU
         gart_iommu_init();
 #endif