mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-07 00:59:06 +00:00
[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>
This commit is contained in:
parent
86865771ea
commit
4134791728
1 changed files with 10 additions and 5 deletions
|
@ -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,
|
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;
|
struct page *page;
|
||||||
int i;
|
int i;
|
||||||
unsigned long reg, segments, pages_per_segment, ptab_size, stab_size,
|
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;
|
pages_per_segment = 1ull << IO_PAGENO_BITS;
|
||||||
|
|
||||||
pr_debug("%s: iommu[%d]: segments: %lu, pages per segment: %lu\n",
|
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");
|
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 |
|
iommu->stab[i] = reg |
|
||||||
(__pa(iommu->ptab) + n_pte_pages * IOMMU_PAGE_SIZE * i);
|
(__pa(iommu->ptab) + n_pte_pages * IOMMU_PAGE_SIZE * i);
|
||||||
pr_debug("\t[%d] 0x%016lx\n", i, iommu->stab[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,
|
static void cell_iommu_setup_hardware(struct cbe_iommu *iommu,
|
||||||
unsigned long base, unsigned long size)
|
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);
|
cell_iommu_enable_hardware(iommu);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue