[PATCH v3 00/16] drm/tegra: Fix IOVA space on Tegra186 and later

Thierry Reding
2019-02-01T13:28:21Z

Tegra186 and later are different from 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 second version of the series addresses all review comments and adds
a number of patches that will actually allow host1x to work with an SMMU
enabled on Tegra186. The patches also add programming required to
address the full 40 bits of address space.

The third version of the series fixes the 40-bit addressing code by
making sure that wide opcodes are always written atomically to the push
buffer. Another pair of patches are introduced to fix a long-standing
bug where the HOST1X_CHANNEL_DMAEND register wasn't properly programmed
and one push buffer memory optimization that avoid wasting almost one
full memory page per push buffer.

This supersedes the following patch:

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

Thierry

Thierry Reding (16):
gpu: host1x: Set up stream ID table
gpu: host1x: Program the channel stream ID
gpu: host1x: Introduce support for wide opcodes
gpu: host1x: Support 40-bit addressing
gpu: host1x: Use direct DMA with IOMMU API usage
gpu: host1x: Restrict IOVA space to DMA mask
gpu: host1x: Support 40-bit addressing on Tegra186
gpu: host1x: Use correct semantics for HOST1X_CHANNEL_DMAEND
gpu: host1x: Optimize CDMA push buffer memory usage
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
drm/tegra: vic: Do not clear driver data
drm/tegra: vic: Support stream ID register programming
arm64: tegra: Enable SMMU for VIC on Tegra186

arch/arm64/boot/dts/nvidia/tegra186.dtsi | 1 +
drivers/gpu/drm/tegra/drm.c | 57 +++++----
drivers/gpu/drm/tegra/drm.h | 1 +
drivers/gpu/drm/tegra/vic.c | 75 ++++++++---
drivers/gpu/drm/tegra/vic.h | 9 ++
drivers/gpu/host1x/cdma.c | 132 ++++++++++++++++++--
drivers/gpu/host1x/cdma.h | 2 +
drivers/gpu/host1x/dev.c | 49 +++++++-
drivers/gpu/host1x/dev.h | 8 ++
drivers/gpu/host1x/hw/cdma_hw.c | 32 ++++-
drivers/gpu/host1x/hw/channel_hw.c | 42 ++++++-
drivers/gpu/host1x/hw/host1x06_hardware.h | 6 +
drivers/gpu/host1x/hw/host1x07_hardware.h | 6 +
drivers/gpu/host1x/hw/hw_host1x06_channel.h | 11 ++
drivers/gpu/host1x/hw/hw_host1x07_channel.h | 11 ++
include/trace/events/host1x.h | 26 ++++
16 files changed, 404 insertions(+), 64 deletions(-)
create mode 100644 drivers/gpu/host1x/hw/hw_host1x06_channel.h
create mode 100644 drivers/gpu/host1x/hw/hw_host1x07_channel.h