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iommu/rockchip: add max segment size for device

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The default max segment size is 64Kb, if memory that device
want to map larger than default then it will break to several times
mapping which may result in non-contiguous IOVA. So set to 4Gb

Change-Id: I22eb7f30a3f741689c8c32734509c34f99fd8100
Signed-off-by: Simon Xue <xxm@rock-chips.com>
This commit is contained in:
Simon Xue
2021-04-06 16:54:17 +08:00
committed by Tao Huang
parent 85959f645b
commit 3fc0486fdf
1 changed files with 8 additions and 0 deletions
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8
drivers/iommu/rockchip-iommu.c
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@@ -1107,6 +1107,14 @@ static struct iommu_device *rk_iommu_probe_device(struct device *dev)
data->defer_attach = false;
/* set max segment size for dev, needed for single chunk map */
if (!dev->dma_parms)
dev->dma_parms = kzalloc(sizeof(*dev->dma_parms), GFP_KERNEL);
if (!dev->dma_parms)
return ERR_PTR(-ENOMEM);
dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
return &iommu->iommu;
}