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[0/5] drm/tegra: Fix IOVA space on Tegra186 and later

Message ID 20190123093951.24908-1-thierry.reding@gmail.com (mailing list archive)
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Series drm/tegra: Fix IOVA space on Tegra186 and later | expand

Message

Thierry Reding Jan. 23, 2019, 9:39 a.m. UTC 
From: Thierry Reding <treding@nvidia.com>

Tegra186 and later are different than earlier generations in that they
use an ARM SMMU rather than the Tegra SMMU. The ARM SMMU driver behaves
slightly differently in that the geometry for IOMMU domains is set only
after a device was attached to it. This is to make sure that the SMMU
instance that the domain belongs to is known, because each instance can
have a different input address space (i.e. geometry).

Work around this by moving all IOVA allocations to a point where the
geometry of the domain is properly initialized.

This supersedes the following patch:

    https://patchwork.kernel.org/patch/10775579/

Thierry

Thierry Reding (5):
  drm/tegra: Store parent pointer in Tegra DRM clients
  drm/tegra: vic: Load firmware on demand
  drm/tegra: Setup shared IOMMU domain after initialization
  drm/tegra: Restrict IOVA space to DMA mask
  gpu: host1x: Supports 40-bit addressing on Tegra186

 drivers/gpu/drm/tegra/drm.c | 57 +++++++++++++++++++++----------------
 drivers/gpu/drm/tegra/drm.h |  1 +
 drivers/gpu/drm/tegra/vic.c | 17 ++++++-----
 drivers/gpu/host1x/dev.c    |  2 +-
 4 files changed, 44 insertions(+), 33 deletions(-)