From 31f077dc7dffd4a444932a9fe7fe84d9c7b90b73 Mon Sep 17 00:00:00 2001 From: Tushar Dave Date: Fri, 28 Oct 2016 10:12:42 -0700 Subject: 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 Reviewed-by: chris hyser Reviewed-by: Sowmini Varadhan Signed-off-by: David S. Miller --- arch/sparc/kernel/pci_sun4v.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'arch/sparc/kernel/pci_sun4v.c') diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 2afb86c73da9..242477cbfdf2 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; } -- cgit v1.2.3