x86: rename iommu_num_pages function to iommu_nr_pages
This series of patches re-introduces the iommu_num_pages function so that
it can be used by each architecture specific IOMMU implementations. The
series also changes IOMMU implementations for X86, Alpha, PowerPC and
UltraSparc. The other implementations are not yet changed because the
modifications required are not obvious and I can't test them on real
hardware.
This patch:
This is a preparation patch for introducing a generic iommu_num_pages function.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 34e4d11..10646ac 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -295,7 +295,7 @@
u64 address, size_t size)
{
int s = 0;
- unsigned pages = iommu_num_pages(address, size);
+ unsigned pages = iommu_nr_pages(address, size);
address &= PAGE_MASK;
@@ -679,7 +679,7 @@
if (iommu->exclusion_start &&
iommu->exclusion_start < dma_dom->aperture_size) {
unsigned long startpage = iommu->exclusion_start >> PAGE_SHIFT;
- int pages = iommu_num_pages(iommu->exclusion_start,
+ int pages = iommu_nr_pages(iommu->exclusion_start,
iommu->exclusion_length);
dma_ops_reserve_addresses(dma_dom, startpage, pages);
}
@@ -935,7 +935,7 @@
unsigned long align_mask = 0;
int i;
- pages = iommu_num_pages(paddr, size);
+ pages = iommu_nr_pages(paddr, size);
paddr &= PAGE_MASK;
if (align)
@@ -980,7 +980,7 @@
if ((dma_addr == 0) || (dma_addr + size > dma_dom->aperture_size))
return;
- pages = iommu_num_pages(dma_addr, size);
+ pages = iommu_nr_pages(dma_addr, size);
dma_addr &= PAGE_MASK;
start = dma_addr;
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 0a3824e..1926248 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -125,13 +125,13 @@
pci_swiotlb_init();
}
-unsigned long iommu_num_pages(unsigned long addr, unsigned long len)
+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_num_pages);
+EXPORT_SYMBOL(iommu_nr_pages);
#endif
void *dma_generic_alloc_coherent(struct device *dev, size_t size,
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index 145f1c8..14f1b41 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -231,7 +231,7 @@
static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
size_t size, int dir, unsigned long align_mask)
{
- unsigned long npages = iommu_num_pages(phys_mem, size);
+ unsigned long npages = iommu_nr_pages(phys_mem, size);
unsigned long iommu_page = alloc_iommu(dev, npages, align_mask);
int i;
@@ -285,7 +285,7 @@
return;
iommu_page = (dma_addr - iommu_bus_base)>>PAGE_SHIFT;
- npages = iommu_num_pages(dma_addr, size);
+ npages = iommu_nr_pages(dma_addr, size);
for (i = 0; i < npages; i++) {
iommu_gatt_base[iommu_page + i] = gart_unmapped_entry;
CLEAR_LEAK(iommu_page + i);
@@ -368,7 +368,7 @@
}
addr = phys_addr;
- pages = iommu_num_pages(s->offset, s->length);
+ pages = iommu_nr_pages(s->offset, s->length);
while (pages--) {
iommu_gatt_base[iommu_page] = GPTE_ENCODE(addr);
SET_LEAK(iommu_page);
@@ -451,7 +451,7 @@
seg_size += s->length;
need = nextneed;
- pages += iommu_num_pages(s->offset, s->length);
+ pages += iommu_nr_pages(s->offset, s->length);
ps = s;
}
if (dma_map_cont(dev, start_sg, i - start, sgmap, pages, need) < 0)
diff --git a/include/asm-x86/iommu.h b/include/asm-x86/iommu.h
index 546ad31..961e746 100644
--- a/include/asm-x86/iommu.h
+++ b/include/asm-x86/iommu.h
@@ -8,7 +8,7 @@
extern int iommu_detected;
extern int dmar_disabled;
-extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len);
+extern unsigned long iommu_nr_pages(unsigned long addr, unsigned long len);
#ifdef CONFIG_GART_IOMMU
extern int gart_iommu_aperture;