#include <asm/proto.h>
#include <asm/dma.h>
-#include <asm/gart.h>
+#include <asm/iommu.h>
#include <asm/calgary.h>
+#include <asm/amd_iommu.h>
-int forbid_dac __read_mostly;
-EXPORT_SYMBOL(forbid_dac);
-
-const struct dma_mapping_ops *dma_ops;
+struct dma_mapping_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
static int iommu_sac_force __read_mostly;
/* Dummy device used for NULL arguments (normally ISA). Better would
be probably a smaller DMA mask, but this is bug-to-bug compatible
to older i386. */
-struct device fallback_dev = {
+struct device x86_dma_fallback_dev = {
.bus_id = "fallback device",
.coherent_dma_mask = DMA_32BIT_MASK,
- .dma_mask = &fallback_dev.coherent_dma_mask,
+ .dma_mask = &x86_dma_fallback_dev.coherent_dma_mask,
};
+EXPORT_SYMBOL(x86_dma_fallback_dev);
int dma_set_mask(struct device *dev, u64 mask)
{
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);
+ size = roundup(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
}
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;
* The order of these functions is important for
* fall-back/fail-over reasons
*/
-#ifdef CONFIG_GART_IOMMU
gart_iommu_hole_init();
-#endif
-#ifdef CONFIG_CALGARY_IOMMU
detect_calgary();
-#endif
detect_intel_iommu();
-#ifdef CONFIG_SWIOTLB
+ amd_iommu_detect();
+
pci_swiotlb_init();
-#endif
}
+
+unsigned long iommu_nr_pages(unsigned long addr, unsigned long len)
+{
+ unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE);
+
+ return size >> PAGE_SHIFT;
+}
+EXPORT_SYMBOL(iommu_nr_pages);
#endif
+void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_addr, gfp_t flag)
+{
+ unsigned long dma_mask;
+ struct page *page;
+ dma_addr_t addr;
+
+ dma_mask = dma_alloc_coherent_mask(dev, flag);
+
+ flag |= __GFP_ZERO;
+again:
+ page = alloc_pages_node(dev_to_node(dev), flag, get_order(size));
+ if (!page)
+ return NULL;
+
+ addr = page_to_phys(page);
+ if (!is_buffer_dma_capable(dma_mask, addr, size)) {
+ __free_pages(page, get_order(size));
+
+ if (dma_mask < DMA_32BIT_MASK && !(flag & GFP_DMA)) {
+ flag = (flag & ~GFP_DMA32) | GFP_DMA;
+ goto again;
+ }
+
+ return NULL;
+ }
+
+ *dma_addr = addr;
+ return page_address(page);
+}
+
/*
* See <Documentation/x86_64/boot-options.txt> for the iommu kernel parameter
* documentation.
swiotlb = 1;
#endif
-#ifdef CONFIG_GART_IOMMU
gart_parse_options(p);
-#endif
#ifdef CONFIG_CALGARY_IOMMU
if (!strncmp(p, "calgary", 7))
int dma_supported(struct device *dev, u64 mask)
{
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+
#ifdef CONFIG_PCI
if (mask > 0xffffffff && forbid_dac > 0) {
- printk(KERN_INFO "PCI: Disallowing DAC for device %s\n",
- dev->bus_id);
+ dev_info(dev, "PCI: Disallowing DAC for device\n");
return 0;
}
#endif
- if (dma_ops->dma_supported)
- return dma_ops->dma_supported(dev, mask);
+ if (ops->dma_supported)
+ return ops->dma_supported(dev, mask);
/* Copied from i386. Doesn't make much sense, because it will
only work for pci_alloc_coherent.
type. Normally this doesn't make any difference, but gives
more gentle handling of IOMMU overflow. */
if (iommu_sac_force && (mask >= DMA_40BIT_MASK)) {
- printk(KERN_INFO "%s: Force SAC with mask %Lx\n",
- dev->bus_id, mask);
+ dev_info(dev, "Force SAC with mask %Lx\n", mask);
return 0;
}
}
EXPORT_SYMBOL(dma_supported);
-/* Allocate DMA memory on node near device */
-noinline struct page *
-dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order)
-{
- int node;
-
- node = dev_to_node(dev);
-
- return alloc_pages_node(node, gfp, order);
-}
-
-/*
- * Allocate memory for a coherent mapping.
- */
-void *
-dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
- gfp_t gfp)
-{
- void *memory = NULL;
- 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);
-
- if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
- return memory;
-
- if (!dev) {
- dev = &fallback_dev;
- gfp |= GFP_DMA;
- }
- dma_mask = dev->coherent_dma_mask;
- if (dma_mask == 0)
- dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK;
-
- /* Device not DMA able */
- if (dev->dma_mask == NULL)
- return NULL;
-
- /* 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)) {
- gfp |= GFP_DMA32;
- if (dma_mask < DMA_32BIT_MASK)
- noretry = 1;
- }
-#endif
-
- again:
- page = dma_alloc_pages(dev,
- noretry ? gfp | __GFP_NORETRY : gfp, get_order(size));
- if (page == NULL)
- return NULL;
-
- {
- int high, mmu;
- bus = page_to_phys(page);
- memory = page_address(page);
- high = (bus + size) >= dma_mask;
- mmu = high;
- if (force_iommu && !(gfp & GFP_DMA))
- mmu = 1;
- else if (high) {
- free_pages((unsigned long)memory,
- get_order(size));
-
- /* Don't use the 16MB ZONE_DMA unless absolutely
- needed. It's better to use remapping first. */
- if (dma_mask < DMA_32BIT_MASK && !(gfp & GFP_DMA)) {
- gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
- goto again;
- }
-
- /* Let low level make its own zone decisions */
- gfp &= ~(GFP_DMA32|GFP_DMA);
-
- if (dma_ops->alloc_coherent)
- return dma_ops->alloc_coherent(dev, size,
- dma_handle, gfp);
- return NULL;
- }
-
- memset(memory, 0, size);
- if (!mmu) {
- *dma_handle = bus;
- return memory;
- }
- }
-
- if (dma_ops->alloc_coherent) {
- free_pages((unsigned long)memory, get_order(size));
- gfp &= ~(GFP_DMA|GFP_DMA32);
- return dma_ops->alloc_coherent(dev, size, dma_handle, gfp);
- }
-
- if (dma_ops->map_simple) {
- *dma_handle = dma_ops->map_simple(dev, virt_to_phys(memory),
- size,
- PCI_DMA_BIDIRECTIONAL);
- if (*dma_handle != bad_dma_address)
- return memory;
- }
-
- if (panic_on_overflow)
- panic("dma_alloc_coherent: IOMMU overflow by %lu bytes\n",
- (unsigned long)size);
- free_pages((unsigned long)memory, get_order(size));
- return NULL;
-}
-EXPORT_SYMBOL(dma_alloc_coherent);
-
-/*
- * Unmap coherent memory.
- * The caller must ensure that the device has finished accessing the mapping.
- */
-void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t bus)
-{
- int order = get_order(size);
- WARN_ON(irqs_disabled()); /* for portability */
- if (dma_release_from_coherent(dev, order, vaddr))
- return;
- if (dma_ops->unmap_single)
- dma_ops->unmap_single(dev, bus, size, 0);
- free_pages((unsigned long)vaddr, order);
-}
-EXPORT_SYMBOL(dma_free_coherent);
-
static int __init pci_iommu_init(void)
{
-#ifdef CONFIG_CALGARY_IOMMU
calgary_iommu_init();
-#endif
intel_iommu_init();
-#ifdef CONFIG_GART_IOMMU
+ amd_iommu_init();
+
gart_iommu_init();
-#endif
no_iommu_init();
return 0;
}
/* Must execute after PCI subsystem */
fs_initcall(pci_iommu_init);
-
-#ifdef CONFIG_PCI
-/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
-
-static __devinit void via_no_dac(struct pci_dev *dev)
-{
- if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
- printk(KERN_INFO "PCI: VIA PCI bridge detected."
- "Disabling DAC.\n");
- forbid_dac = 1;
- }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
-#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff