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drm/nouveau/bo: consider DMA buffers on x86 only

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The DMA API has different semantics on different architectures.
Currently on arm64, it can only provide memory from a small pool which
dries up quickly if we attempt to allocate big buffers from it.

Do not consider that option when running on non-x86, since regular TTM
buffers are the (current) best-fit for ARM platforms.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Alexandre Courbot
2016-03-02 19:12:27 +09:00
committed by Ben Skeggs
parent ab08f38cac
commit 9bcd38de5b
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/nouveau/nouveau_bo.c
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@@ -1502,7 +1502,7 @@ nouveau_ttm_tt_populate(struct ttm_tt *ttm)
}
#endif
#ifdef CONFIG_SWIOTLB
#if IS_ENABLED(CONFIG_SWIOTLB) && IS_ENABLED(CONFIG_X86)
if (swiotlb_nr_tbl()) {
return ttm_dma_populate((void *)ttm, dev->dev);
}
@@ -1570,7 +1570,7 @@ nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
}
#endif
#ifdef CONFIG_SWIOTLB
#if IS_ENABLED(CONFIG_SWIOTLB) && IS_ENABLED(CONFIG_X86)
if (swiotlb_nr_tbl()) {
ttm_dma_unpopulate((void *)ttm, dev->dev);
return;