From 1c894225bf5b1cdffac0c6ef935b61273203d7d5 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Mon, 16 Oct 2017 21:30:07 +0900 Subject: [PATCH] iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master The r8a7795 IPMMU supports 40-bit bus mastering. Both the coherent DMA mask and the streaming DMA mask are set to unlock the 40-bit address space for coherent allocations and streaming operations. Signed-off-by: Magnus Damm Signed-off-by: Alex Williamson --- drivers/iommu/ipmmu-vmsa.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 9cde619..6b74ec6 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -903,6 +903,7 @@ static int ipmmu_probe(struct platform_device *pdev) spin_lock_init(&mmu->lock); bitmap_zero(mmu->ctx, IPMMU_CTX_MAX); mmu->features = of_device_get_match_data(&pdev->dev); + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)); /* Map I/O memory and request IRQ. */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); -- 2.7.4