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[POWERPC] Split out the ioid fetching/checking logic

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Split out the ioid fetching and checking logic so we can use it elsewhere
in a subsequent patch.

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:
Michael Ellerman 2008-01-30 01:14:02 +11:00 committed by Paul Mackerras
parent 4134791728
commit c96b51265a
1 changed files with 17 additions and 6 deletions
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23
arch/powerpc/platforms/cell/iommu.c
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@ -443,25 +443,36 @@ static struct iommu_window *find_window(struct cbe_iommu *iommu,
}
#endif
static inline u32 cell_iommu_get_ioid(struct device_node *np)
{
const u32 *ioid;
ioid = of_get_property(np, "ioid", NULL);
if (ioid == NULL) {
printk(KERN_WARNING "iommu: missing ioid for %s using 0\n",
np->full_name);
return 0;
}
return *ioid;
}
static struct iommu_window * __init
cell_iommu_setup_window(struct cbe_iommu *iommu, struct device_node *np,
unsigned long offset, unsigned long size,
unsigned long pte_offset)
{
struct iommu_window *window;
const unsigned int *ioid;
u32 ioid;
ioid = of_get_property(np, "ioid", NULL);
if (ioid == NULL)
printk(KERN_WARNING "iommu: missing ioid for %s using 0\n",
np->full_name);
ioid = cell_iommu_get_ioid(np);
window = kmalloc_node(sizeof(*window), GFP_KERNEL, iommu->nid);
BUG_ON(window == NULL);
window->offset = offset;
window->size = size;
window->ioid = ioid ? *ioid : 0;
window->ioid = ioid;
window->iommu = iommu;
window->pte_offset = pte_offset;