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@xxxxxxxxxx>
Reviewed-by: chris hyser <chris.hyser@xxxxxxxxxx>
Reviewed-by: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
---
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 a1c4d5e..5404b33 100644
--- a/arch/sparc/kernel/pci_sun4v.c
+++ b/arch/sparc/kernel/pci_sun4v.c
@@ -643,6 +643,8 @@ 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;
@@ -681,6 +683,23 @@ 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
--
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