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sparc32: Kill iounit_map_dma_*().

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2008-08-26 21:14:05 -07:00
parent 47a2d72885
commit 0ad626a2a4
3 changed files with 0 additions and 55 deletions
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48
arch/sparc/mm/io-unit.c
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@@ -267,51 +267,3 @@ void __init ld_mmu_iounit(void)
BTFIXUPSET_CALL(mmu_unmap_dma_area, iounit_unmap_dma_area, BTFIXUPCALL_NORM);
#endif
}
__u32 iounit_map_dma_init(struct sbus_bus *sbus, int size)
{
int i, j, k, npages;
unsigned long rotor, scan, limit;
unsigned long flags;
__u32 ret;
struct iounit_struct *iounit = sbus->ofdev.dev.archdata.iommu;
npages = (size + (PAGE_SIZE-1)) >> PAGE_SHIFT;
i = 0x0213;
spin_lock_irqsave(&iounit->lock, flags);
next: j = (i & 15);
rotor = iounit->rotor[j - 1];
limit = iounit->limit[j];
scan = rotor;
nexti: scan = find_next_zero_bit(iounit->bmap, limit, scan);
if (scan + npages > limit) {
if (limit != rotor) {
limit = rotor;
scan = iounit->limit[j - 1];
goto nexti;
}
i >>= 4;
if (!(i & 15))
panic("iounit_map_dma_init: Couldn't find free iopte slots for %d bytes\n", size);
goto next;
}
for (k = 1, scan++; k < npages; k++)
if (test_bit(scan++, iounit->bmap))
goto nexti;
iounit->rotor[j - 1] = (scan < limit) ? scan : iounit->limit[j - 1];
scan -= npages;
ret = IOUNIT_DMA_BASE + (scan << PAGE_SHIFT);
for (k = 0; k < npages; k++, scan++)
set_bit(scan, iounit->bmap);
spin_unlock_irqrestore(&iounit->lock, flags);
return ret;
}
__u32 iounit_map_dma_page(__u32 vaddr, void *addr, struct sbus_bus *sbus)
{
int scan = (vaddr - IOUNIT_DMA_BASE) >> PAGE_SHIFT;
struct iounit_struct *iounit = sbus->ofdev.dev.archdata.iommu;
iounit->page_table[scan] = MKIOPTE(__pa(((unsigned long)addr) & PAGE_MASK));
return vaddr + (((unsigned long)addr) & ~PAGE_MASK);
}