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sparc64: Initialize iommu_map_table and iommu_pool
Like legacy IOMMU, use common iommu_map_table and iommu_pool for ATU. This change initializes iommu_map_table and iommu_pool for ATU. Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com> Reviewed-by: chris hyser <chris.hyser@oracle.com> Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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f0248c1524
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2 changed files with 21 additions and 0 deletions
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@ -45,8 +45,10 @@ struct atu_ranges {
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struct atu {
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struct atu_ranges *ranges;
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struct atu_iotsb *iotsb;
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struct iommu_map_table tbl;
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u64 base;
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u64 size;
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u64 dma_addr_mask;
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};
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struct iommu {
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@ -644,6 +644,8 @@ static int pci_sun4v_atu_init(struct pci_pbm_info *pbm)
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struct atu *atu = pbm->iommu->atu;
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unsigned long err;
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const u64 *ranges;
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u64 map_size, num_iotte;
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u64 dma_mask;
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const u32 *page_size;
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int len;
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@ -682,6 +684,23 @@ static int pci_sun4v_atu_init(struct pci_pbm_info *pbm)
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return err;
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}
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/* Create ATU iommu map.
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* One bit represents one iotte in IOTSB table.
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*/
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dma_mask = (roundup_pow_of_two(atu->size) - 1UL);
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num_iotte = atu->size / IO_PAGE_SIZE;
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map_size = num_iotte / 8;
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atu->tbl.table_map_base = atu->base;
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atu->dma_addr_mask = dma_mask;
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atu->tbl.map = kzalloc(map_size, GFP_KERNEL);
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if (!atu->tbl.map)
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return -ENOMEM;
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iommu_tbl_pool_init(&atu->tbl, num_iotte, IO_PAGE_SHIFT,
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NULL, false /* no large_pool */,
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0 /* default npools */,
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false /* want span boundary checking */);
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return 0;
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}
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