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authorMichael Ellerman <michael@ellerman.id.au>2008-01-30 01:14:01 +1100
committerPaul Mackerras <paulus@samba.org>2008-01-31 12:11:11 +1100
commit41347917280bcd96619441dae20507711608b4b8 (patch)
tree61d9f6fbfef4453ec72f7ff04cec4e5c3f0cf40a /arch
parent86865771ea213d756b03e1f2ff44d3f811672762 (diff)
[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.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index a6e6bc1b020..950d4327b41 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);
}