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powerpc: use iommu_num_pages function in IOMMU code 

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joerg Roedel 2008-10-15 22:02:13 -07:00 committed by Linus Torvalds
parent 036b4c50fe
commit 2994a3b265
1 changed files with 7 additions and 16 deletions
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23
arch/powerpc/kernel/iommu.c
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@ -51,17 +51,6 @@ static int protect4gb = 1;
static void __iommu_free(struct iommu_table *, dma_addr_t, unsigned int); static void __iommu_free(struct iommu_table *, dma_addr_t, unsigned int);
static inline unsigned long iommu_nr_pages(unsigned long vaddr,
unsigned long slen)
{
unsigned long npages;
npages = IOMMU_PAGE_ALIGN(vaddr + slen) - (vaddr & IOMMU_PAGE_MASK);
npages >>= IOMMU_PAGE_SHIFT;
return npages;
}
static int __init setup_protect4gb(char *str) static int __init setup_protect4gb(char *str)
{ {
if (strcmp(str, "on") == 0) if (strcmp(str, "on") == 0)
@ -325,7 +314,7 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
} }
/* Allocate iommu entries for that segment */ /* Allocate iommu entries for that segment */
vaddr = (unsigned long) sg_virt(s); vaddr = (unsigned long) sg_virt(s);
npages = iommu_nr_pages(vaddr, slen); npages = iommu_num_pages(vaddr, slen, IOMMU_PAGE_SIZE);
align = 0; align = 0;
if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && slen >= PAGE_SIZE && if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && slen >= PAGE_SIZE &&
(vaddr & ~PAGE_MASK) == 0) (vaddr & ~PAGE_MASK) == 0)
@ -418,7 +407,8 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
unsigned long vaddr, npages; unsigned long vaddr, npages;
vaddr = s->dma_address & IOMMU_PAGE_MASK; vaddr = s->dma_address & IOMMU_PAGE_MASK;
npages = iommu_nr_pages(s->dma_address, s->dma_length); npages = iommu_num_pages(s->dma_address, s->dma_length,
IOMMU_PAGE_SIZE);
__iommu_free(tbl, vaddr, npages); __iommu_free(tbl, vaddr, npages);
s->dma_address = DMA_ERROR_CODE; s->dma_address = DMA_ERROR_CODE;
s->dma_length = 0; s->dma_length = 0;
@ -452,7 +442,8 @@ void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
if (sg->dma_length == 0) if (sg->dma_length == 0)
break; break;
npages = iommu_nr_pages(dma_handle, sg->dma_length); npages = iommu_num_pages(dma_handle, sg->dma_length,
IOMMU_PAGE_SIZE);
__iommu_free(tbl, dma_handle, npages); __iommu_free(tbl, dma_handle, npages);
sg = sg_next(sg); sg = sg_next(sg);
} }
@ -584,7 +575,7 @@ dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl,
BUG_ON(direction == DMA_NONE); BUG_ON(direction == DMA_NONE);
uaddr = (unsigned long)vaddr; uaddr = (unsigned long)vaddr;
npages = iommu_nr_pages(uaddr, size); npages = iommu_num_pages(uaddr, size, IOMMU_PAGE_SIZE);
if (tbl) { if (tbl) {
align = 0; align = 0;
@ -617,7 +608,7 @@ void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle,
BUG_ON(direction == DMA_NONE); BUG_ON(direction == DMA_NONE);
if (tbl) { if (tbl) {
npages = iommu_nr_pages(dma_handle, size); npages = iommu_num_pages(dma_handle, size, IOMMU_PAGE_SIZE);
iommu_free(tbl, dma_handle, npages); iommu_free(tbl, dma_handle, npages);
} }
} }