diff options
| author | Michael Ellerman <michael@ellerman.id.au> | 2008-01-29 15:14:01 +0100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-01-31 02:11:11 +0100 |
| commit | 41347917280bcd96619441dae20507711608b4b8 (patch) | |
| tree | 61d9f6fbfef4453ec72f7ff04cec4e5c3f0cf40a /arch | |
| parent | [POWERPC] Split out the IOMMU logic from cell_dma_dev_setup() (diff) | |
| download | linux-41347917280bcd96619441dae20507711608b4b8.tar.xz linux-41347917280bcd96619441dae20507711608b4b8.zip | |
[POWERPC] Add support to cell_iommu_setup_page_tables() for multiple windows
Add support to cell_iommu_setup_page_tables() for handling two windows,
the dynamic window and the fixed window. A fixed window size of 0
indicates that there is no fixed window at all.
Currently there are no callers who pass a non-zero fixed window, but the
upcoming fixed IOMMU mapping patch will change that.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index a6e6bc1b020f..950d4327b41e 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -307,14 +307,19 @@ static int cell_iommu_find_ioc(int nid, unsigned long *base) } static void cell_iommu_setup_page_tables(struct cbe_iommu *iommu, - unsigned long base, unsigned long size) + unsigned long dbase, unsigned long dsize, + unsigned long fbase, unsigned long fsize) { struct page *page; int i; unsigned long reg, segments, pages_per_segment, ptab_size, stab_size, - n_pte_pages; + n_pte_pages, base; - segments = size >> IO_SEGMENT_SHIFT; + base = dbase; + if (fsize != 0) + base = min(fbase, dbase); + + segments = max(dbase + dsize, fbase + fsize) >> IO_SEGMENT_SHIFT; pages_per_segment = 1ull << IO_PAGENO_BITS; pr_debug("%s: iommu[%d]: segments: %lu, pages per segment: %lu\n", @@ -366,7 +371,7 @@ static void cell_iommu_setup_page_tables(struct cbe_iommu *iommu, } pr_debug("Setting up IOMMU stab:\n"); - for (i = 0; i * (1ul << IO_SEGMENT_SHIFT) < size; i++) { + for (i = base >> IO_SEGMENT_SHIFT; i < segments; i++) { iommu->stab[i] = reg | (__pa(iommu->ptab) + n_pte_pages * IOMMU_PAGE_SIZE * i); pr_debug("\t[%d] 0x%016lx\n", i, iommu->stab[i]); @@ -417,7 +422,7 @@ static void cell_iommu_enable_hardware(struct cbe_iommu *iommu) static void cell_iommu_setup_hardware(struct cbe_iommu *iommu, unsigned long base, unsigned long size) { - cell_iommu_setup_page_tables(iommu, base, size); + cell_iommu_setup_page_tables(iommu, base, size, 0, 0); cell_iommu_enable_hardware(iommu); } |