Commit 120a264f authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Inki Dae

drm/exynos: gem: Drop NONCONTIG flag for buffers allocated without IOMMU

When no IOMMU is available, all GEM buffers allocated by Exynos DRM driver
are contiguous, because of the underlying dma_alloc_attrs() function
provides only such buffers. In such case it makes no sense to keep
BO_NONCONTIG flag for the allocated GEM buffers. This allows to avoid
failures for buffer contiguity checks in the subsequent operations on GEM
objects.
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
CC: stable@vger.kernel.org # v4.4+
parent 89452d4a
...@@ -247,6 +247,15 @@ struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev, ...@@ -247,6 +247,15 @@ struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev,
if (IS_ERR(exynos_gem)) if (IS_ERR(exynos_gem))
return exynos_gem; return exynos_gem;
if (!is_drm_iommu_supported(dev) && (flags & EXYNOS_BO_NONCONTIG)) {
/*
* when no IOMMU is available, all allocated buffers are
* contiguous anyway, so drop EXYNOS_BO_NONCONTIG flag
*/
flags &= ~EXYNOS_BO_NONCONTIG;
DRM_WARN("Non-contiguous allocation is not supported without IOMMU, falling back to contiguous buffer\n");
}
/* set memory type and cache attribute from user side. */ /* set memory type and cache attribute from user side. */
exynos_gem->flags = flags; exynos_gem->flags = flags;
......
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