[SPARC64]: Consolidate common PCI IOMMU init code.

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>

1 files changed, 50 insertions, 4 deletions

diff --git a/arch/sparc64/kernel/pci_iommu.c b/arch/sparc64/kernel/pci_iommu.c
index 425c60cfea19..cdee7d9fed72 100644
--- a/arch/sparc64/kernel/pci_iommu.c
+++ b/arch/sparc64/kernel/pci_iommu.c
@@ -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;
+
+        /* 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;
+
+        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;
+        }
 
-        tsbsize /= sizeof(iopte_t);
+        /* 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; i++)
+        for (i = 0; i < tsbsize / sizeof(iopte_t); i++)
                 iopte_make_dummy(iommu, &iommu->page_table[i]);
 }