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[SPARC64]: Consolidate common PCI IOMMU init code.

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All the PCI controller drivers were doing the same thing
setting up the IOMMU software state, put it all in one spot.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2005-10-13 21:10:08 -07:00
parent c931488cc4
commit 51e8513615
5 changed files with 63 additions and 133 deletions
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54
arch/sparc64/kernel/pci_iommu.c
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@@ -80,13 +80,59 @@ static void inline iopte_make_dummy(struct pci_iommu *iommu, iopte_t *iopte)
iopte_val(*iopte) = val;
}
void pci_iommu_table_init(struct pci_iommu *iommu, int tsbsize)
void pci_iommu_table_init(struct pci_iommu *iommu, int tsbsize, u32 dma_offset, u32 dma_addr_mask)
{
int i;
unsigned long i, tsbbase, order;
tsbsize /= sizeof(iopte_t);
/* Setup initial software IOMMU state. */
spin_lock_init(&iommu->lock);
iommu->ctx_lowest_free = 1;
iommu->page_table_map_base = dma_offset;
iommu->dma_addr_mask = dma_addr_mask;
for (i = 0; i < tsbsize; i++)
switch (tsbsize / (8 * 1024)) {
case 64:
iommu->page_table_sz_bits = 16;
break;
case 128:
iommu->page_table_sz_bits = 17;
break;
default:
prom_printf("PCI_IOMMU: Illegal TSB size %d\n",
tsbsize / (8 * 1024));
prom_halt();
break;
};
iommu->lowest_consistent_map =
1 << (iommu->page_table_sz_bits - PBM_LOGCLUSTERS);
for (i = 0; i < PBM_NCLUSTERS; i++) {
iommu->alloc_info[i].flush = 0;
iommu->alloc_info[i].next = 0;
}
/* Allocate and initialize the dummy page which we
* set inactive IO PTEs to point to.
*/
iommu->dummy_page = __get_free_pages(GFP_KERNEL, 0);
if (!iommu->dummy_page) {
prom_printf("PCI_IOMMU: Error, gfp(dummy_page) failed.\n");
prom_halt();
}
memset((void *)iommu->dummy_page, 0, PAGE_SIZE);
iommu->dummy_page_pa = (unsigned long) __pa(iommu->dummy_page);
/* Now allocate and setup the IOMMU page table itself. */
order = get_order(tsbsize);
tsbbase = __get_free_pages(GFP_KERNEL, order);
if (!tsbbase) {
prom_printf("PCI_IOMMU: Error, gfp(tsb) failed.\n");
prom_halt();
}
iommu->page_table = (iopte_t *)tsbbase;
for (i = 0; i < tsbsize / sizeof(iopte_t); i++)
iopte_make_dummy(iommu, &iommu->page_table[i]);
}