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drm/ttm, drm/vmwgfx: Use a configuration option for the TTM dma page pool

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Drivers like vmwgfx may want to test whether the dma page pool is present
or not. Since it's activated by default by TTM if compiled-in, define a
hidden configuration option that the driver can test for.

Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Thomas Hellstrom
2019-11-13 19:02:42 +01:00
parent 3ca3a9eab7
commit e2e966636a
5 changed files with 11 additions and 8 deletions
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3
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
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@@ -576,8 +576,7 @@ static int vmw_dma_select_mode(struct vmw_private *dev_priv)
else
dev_priv->map_mode = vmw_dma_map_populate;
/* No TTM coherent page pool? FIXME: Ask TTM instead! */
if (!(IS_ENABLED(CONFIG_SWIOTLB) || IS_ENABLED(CONFIG_INTEL_IOMMU)) &&
if (!IS_ENABLED(CONFIG_DRM_TTM_DMA_PAGE_POOL) &&
(dev_priv->map_mode == vmw_dma_alloc_coherent))
return -EINVAL;