[PATCH v3 3/6] sparc64: Initialize iommu_map_table and iommu_pool

[Tushar Dave]

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.d...@oracle.com>
Reviewed-by: chris hyser <chris.hy...@oracle.com>
Reviewed-by: Sowmini Varadhan <sowmini.varad...@oracle.com>
---
 arch/sparc/include/asm/iommu_64.h |  2 ++
 arch/sparc/kernel/pci_sun4v.c     | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/arch/sparc/include/asm/iommu_64.h 
b/arch/sparc/include/asm/iommu_64.h
index 93daa59..f24f356 100644
--- a/arch/sparc/include/asm/iommu_64.h
+++ b/arch/sparc/include/asm/iommu_64.h
@@ -45,8 +45,10 @@ struct atu_ranges {
 struct atu {
        struct  atu_ranges      *ranges;
        struct  atu_iotsb       *iotsb;
+       struct  iommu_map_table tbl;
        u64                     base;
        u64                     size;
+       u64                     dma_addr_mask;
 };
 
 struct iommu {
diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c
index 2afb86c..242477c 100644
--- a/arch/sparc/kernel/pci_sun4v.c
+++ b/arch/sparc/kernel/pci_sun4v.c
@@ -644,6 +644,8 @@ static int pci_sun4v_atu_init(struct pci_pbm_info *pbm)
        struct atu *atu = pbm->iommu->atu;
        unsigned long err;
        const u64 *ranges;
+       u64 map_size, num_iotte;
+       u64 dma_mask;
        const u32 *page_size;
        int len;
 
@@ -682,6 +684,23 @@ static int pci_sun4v_atu_init(struct pci_pbm_info *pbm)
                return err;
        }
 
+       /* Create ATU iommu map.
+        * One bit represents one iotte in IOTSB table.
+        */
+       dma_mask = (roundup_pow_of_two(atu->size) - 1UL);
+       num_iotte = atu->size / IO_PAGE_SIZE;
+       map_size = num_iotte / 8;
+       atu->tbl.table_map_base = atu->base;
+       atu->dma_addr_mask = dma_mask;
+       atu->tbl.map = kzalloc(map_size, GFP_KERNEL);
+       if (!atu->tbl.map)
+               return -ENOMEM;
+
+       iommu_tbl_pool_init(&atu->tbl, num_iotte, IO_PAGE_SHIFT,
+                           NULL, false /* no large_pool */,
+                           0 /* default npools */,
+                           false /* want span boundary checking */);
+
        return 0;
 }
 
-- 
1.9.1