drm/nouveau/instmem/gk20a: set DMA mask early
DMA mask is typically set in nouveau_ttm_init(), but this function is called late during initialization and GK20A's instmem will have called DMA functions before this happens. Having a wrongly set DMA mask can result in the use of unneeded bounce buffers. Set it early to avoid this. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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@ -280,6 +280,15 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
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goto free;
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}
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/**
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* The IOMMU bit defines the upper limit of the GPU-addressable space.
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* This will be refined in nouveau_ttm_init but we need to do it early
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* for instmem to behave properly
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*/
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ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(tdev->func->iommu_bit));
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if (ret)
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goto free;
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nvkm_device_tegra_probe_iommu(tdev);
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ret = nvkm_device_tegra_power_up(tdev);
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