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| author | Michael Ellerman <michael@ellerman.id.au> | 2008-02-29 10:33:23 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2008-03-03 10:03:15 +0300 |
| commit | 0d7386ebffd8506b28c37a7d5541132a576f64e2 (patch) | |
| tree | 11787b0cc75354af5fe44187cb36840f8dfac18c /arch | |
| parent | f9660e8a6c16e17935777cdee5194842904c2d72 (diff) | |
| download | linux-0d7386ebffd8506b28c37a7d5541132a576f64e2.tar.xz | |
[POWERPC] Use it_offset not pte_offset in cell IOMMU code
The cell IOMMU tce build and free routines use pte_offset to convert
the index passed from the generic IOMMU code into a page table offset.
This takes into account the SPIDER_DMA_OFFSET which sets the top bit
of every DMA address.
However it doesn't cater for the IOMMU window starting at a non-zero
address, as the base of the window is not incorporated into pte_offset
at all.
As it turns out tbl->it_offset already contains the value we need, it
takes into account the base of the window and also pte_offset. So use
it instead!
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index bbe838996470..4e75919bf6b9 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -200,7 +200,7 @@ static void tce_build_cell(struct iommu_table *tbl, long index, long npages, (window->ioid & IOPTE_IOID_Mask); #endif - io_pte = (unsigned long *)tbl->it_base + (index - window->pte_offset); + io_pte = (unsigned long *)tbl->it_base + (index - tbl->it_offset); for (i = 0; i < npages; i++, uaddr += IOMMU_PAGE_SIZE) io_pte[i] = base_pte | (__pa(uaddr) & IOPTE_RPN_Mask); @@ -232,7 +232,7 @@ static void tce_free_cell(struct iommu_table *tbl, long index, long npages) | (window->ioid & IOPTE_IOID_Mask); #endif - io_pte = (unsigned long *)tbl->it_base + (index - window->pte_offset); + io_pte = (unsigned long *)tbl->it_base + (index - tbl->it_offset); for (i = 0; i < npages; i++) io_pte[i] = pte; |