#include <asm/mtrr.h>
#include <asm/pgtable.h>
#include <asm/proto.h>
+#include <asm/iommu.h>
#include <asm/gart.h>
#include <asm/cacheflush.h>
#include <asm/swiotlb.h>
(((x) & 0xfffff000) | (((x) >> 32) << 4) | GPTE_VALID | GPTE_COHERENT)
#define GPTE_DECODE(x) (((x) & 0xfffff000) | (((u64)(x) & 0xff0) << 28))
-#define to_pages(addr, size) \
- (round_up(((addr) & ~PAGE_MASK) + (size), PAGE_SIZE) >> PAGE_SHIFT)
-
#define EMERGENCY_PAGES 32 /* = 128KB */
#ifdef CONFIG_AGP
static unsigned long next_bit; /* protected by iommu_bitmap_lock */
static int need_flush; /* global flush state. set for each gart wrap */
-static unsigned long alloc_iommu(struct device *dev, int size)
+static unsigned long alloc_iommu(struct device *dev, int size,
+ unsigned long align_mask)
{
unsigned long offset, flags;
unsigned long boundary_size;
base_index = ALIGN(iommu_bus_base & dma_get_seg_boundary(dev),
PAGE_SIZE) >> PAGE_SHIFT;
- boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1,
+ boundary_size = ALIGN((unsigned long long)dma_get_seg_boundary(dev) + 1,
PAGE_SIZE) >> PAGE_SHIFT;
spin_lock_irqsave(&iommu_bitmap_lock, flags);
offset = iommu_area_alloc(iommu_gart_bitmap, iommu_pages, next_bit,
- size, base_index, boundary_size, 0);
+ size, base_index, boundary_size, align_mask);
if (offset == -1) {
need_flush = 1;
offset = iommu_area_alloc(iommu_gart_bitmap, iommu_pages, 0,
- size, base_index, boundary_size, 0);
+ size, base_index, boundary_size,
+ align_mask);
}
if (offset != -1) {
next_bit = offset+size;
* out. Hopefully no network devices use single mappings that big.
*/
- printk(KERN_ERR
- "PCI-DMA: Out of IOMMU space for %lu bytes at device %s\n",
- size, dev->bus_id);
+ dev_err(dev, "PCI-DMA: Out of IOMMU space for %lu bytes\n", size);
if (size > PAGE_SIZE*EMERGENCY_PAGES) {
if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL)
static inline int
need_iommu(struct device *dev, unsigned long addr, size_t size)
{
- u64 mask = *dev->dma_mask;
- int high = addr + size > mask;
- int mmu = high;
-
- if (force_iommu)
- mmu = 1;
-
- return mmu;
+ return force_iommu ||
+ !is_buffer_dma_capable(*dev->dma_mask, addr, size);
}
static inline int
nonforced_iommu(struct device *dev, unsigned long addr, size_t size)
{
- u64 mask = *dev->dma_mask;
- int high = addr + size > mask;
- int mmu = high;
-
- return mmu;
+ return !is_buffer_dma_capable(*dev->dma_mask, addr, size);
}
/* Map a single continuous physical area into the IOMMU.
* Caller needs to check if the iommu is needed and flush.
*/
static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
- size_t size, int dir)
+ size_t size, int dir, unsigned long align_mask)
{
- unsigned long npages = to_pages(phys_mem, size);
- unsigned long iommu_page = alloc_iommu(dev, npages);
+ unsigned long npages = iommu_num_pages(phys_mem, size);
+ unsigned long iommu_page = alloc_iommu(dev, npages, align_mask);
int i;
if (iommu_page == -1) {
return iommu_bus_base + iommu_page*PAGE_SIZE + (phys_mem & ~PAGE_MASK);
}
-static dma_addr_t
-gart_map_simple(struct device *dev, phys_addr_t paddr, size_t size, int dir)
-{
- dma_addr_t map = dma_map_area(dev, paddr, size, dir);
-
- flush_gart();
-
- return map;
-}
-
/* Map a single area into the IOMMU */
static dma_addr_t
gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
unsigned long bus;
if (!dev)
- dev = &fallback_dev;
+ dev = &x86_dma_fallback_dev;
if (!need_iommu(dev, paddr, size))
return paddr;
- bus = gart_map_simple(dev, paddr, size, dir);
+ bus = dma_map_area(dev, paddr, size, dir, 0);
+ flush_gart();
return bus;
}
return;
iommu_page = (dma_addr - iommu_bus_base)>>PAGE_SHIFT;
- npages = to_pages(dma_addr, size);
+ npages = iommu_num_pages(dma_addr, size);
for (i = 0; i < npages; i++) {
iommu_gatt_base[iommu_page + i] = gart_unmapped_entry;
CLEAR_LEAK(iommu_page + i);
unsigned long addr = sg_phys(s);
if (nonforced_iommu(dev, addr, s->length)) {
- addr = dma_map_area(dev, addr, s->length, dir);
+ addr = dma_map_area(dev, addr, s->length, dir, 0);
if (addr == bad_dma_address) {
if (i > 0)
gart_unmap_sg(dev, sg, i, dir);
int nelems, struct scatterlist *sout,
unsigned long pages)
{
- unsigned long iommu_start = alloc_iommu(dev, pages);
+ unsigned long iommu_start = alloc_iommu(dev, pages, 0);
unsigned long iommu_page = iommu_start;
struct scatterlist *s;
int i;
}
addr = phys_addr;
- pages = to_pages(s->offset, s->length);
+ pages = iommu_num_pages(s->offset, s->length);
while (pages--) {
iommu_gatt_base[iommu_page] = GPTE_ENCODE(addr);
SET_LEAK(iommu_page);
return 0;
if (!dev)
- dev = &fallback_dev;
+ dev = &x86_dma_fallback_dev;
out = 0;
start = 0;
seg_size += s->length;
need = nextneed;
- pages += to_pages(s->offset, s->length);
+ pages += iommu_num_pages(s->offset, s->length);
ps = s;
}
if (dma_map_cont(dev, start_sg, i - start, sgmap, pages, need) < 0)
return 0;
}
+/* allocate and map a coherent mapping */
+static void *
+gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
+ gfp_t flag)
+{
+ void *vaddr;
+ dma_addr_t paddr;
+ unsigned long align_mask;
+ u64 dma_mask = dma_alloc_coherent_mask(dev, flag);
+
+ vaddr = (void *)__get_free_pages(flag | __GFP_ZERO, get_order(size));
+ if (!vaddr)
+ return NULL;
+
+ paddr = virt_to_phys(vaddr);
+ if (is_buffer_dma_capable(dma_mask, paddr, size)) {
+ *dma_addr = paddr;
+ return vaddr;
+ }
+
+ align_mask = (1UL << get_order(size)) - 1;
+
+ *dma_addr = dma_map_area(dev, paddr, size, DMA_BIDIRECTIONAL,
+ align_mask);
+ flush_gart();
+
+ if (*dma_addr != bad_dma_address)
+ return vaddr;
+
+ free_pages((unsigned long)vaddr, get_order(size));
+
+ return NULL;
+}
+
+/* free a coherent mapping */
+static void
+gart_free_coherent(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_addr)
+{
+ gart_unmap_single(dev, dma_addr, size, DMA_BIDIRECTIONAL);
+ free_pages((unsigned long)vaddr, get_order(size));
+}
+
static int no_agp;
static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)
extern int agp_amd64_init(void);
-static const struct dma_mapping_ops gart_dma_ops = {
- .mapping_error = NULL,
+static struct dma_mapping_ops gart_dma_ops = {
.map_single = gart_map_single,
- .map_simple = gart_map_simple,
.unmap_single = gart_unmap_single,
.sync_single_for_cpu = NULL,
.sync_single_for_device = NULL,
.sync_sg_for_device = NULL,
.map_sg = gart_map_sg,
.unmap_sg = gart_unmap_sg,
+ .alloc_coherent = gart_alloc_coherent,
+ .free_coherent = gart_free_coherent,
};
void gart_iommu_shutdown(void)
* Out of IOMMU space handling.
* Reserve some invalid pages at the beginning of the GART.
*/
- set_bit_string(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
+ iommu_area_reserve(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
agp_memory_reserved = iommu_size;
printk(KERN_INFO
projects / linux-2.6-omap-h63xx.git / blobdiff