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Subject[PATCH v5 05/09] iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master
From: Magnus Damm <damm+renesas@opensource.se>

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 <damm+renesas@opensource.se>
---

Changes since V4:
- None

Changes since V3:
- None

Changes since V2:
- Updated the code and commit message to use 40 bits instead of 64 bits

Changes since V1:
- Updated the commit message

drivers/iommu/ipmmu-vmsa.c | 1 +
1 file changed, 1 insertion(+)

--- 0012/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c 2017-10-16 20:37:31.480607110 +0900
@@ -996,6 +996,7 @@ static int ipmmu_probe(struct platform_d
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);
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