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iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master

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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>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Magnus Damm 2017-10-16 21:30:07 +09:00 committed by Alex Williamson
parent cda52fcd99
commit 1c894225bf
1 changed files with 1 additions and 0 deletions
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drivers/iommu/ipmmu-vmsa.c
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@ -903,6 +903,7 @@ static int ipmmu_probe(struct platform_device *pdev)
spin_lock_init(&mmu->lock); spin_lock_init(&mmu->lock);
bitmap_zero(mmu->ctx, IPMMU_CTX_MAX); bitmap_zero(mmu->ctx, IPMMU_CTX_MAX);
mmu->features = of_device_get_match_data(&pdev->dev); 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. */ /* Map I/O memory and request IRQ. */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);