Details of the 64k pagesize support added as part of DG2 enabling and its
implicit impact on the uAPI.
v2: improvised the Flat-CCS documentation [Danvet & CQ]
v3: made only for 64k pagesize support
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
cc: Matthew Auld <matthew.auld@xxxxxxxxx>
cc: Simon Ser <contact@xxxxxxxxxxx>
cc: Pekka Paalanen <ppaalanen@xxxxxxxxx>
Cc: Jordan Justen <jordan.l.justen@xxxxxxxxx>
Cc: Kenneth Graunke <kenneth@xxxxxxxxxxxxx>
Cc: mesa-dev@xxxxxxxxxxxxxxxxxxxxx
Cc: Tony Ye <tony.ye@xxxxxxxxx>
Cc: Slawomir Milczarek <slawomir.milczarek@xxxxxxxxx>
---
Documentation/gpu/rfc/i915_dg2.rst | 25 +++++++++++++++++++++++++
Documentation/gpu/rfc/index.rst | 3 +++
2 files changed, 28 insertions(+)
create mode 100644 Documentation/gpu/rfc/i915_dg2.rst
diff --git a/Documentation/gpu/rfc/i915_dg2.rst b/Documentation/gpu/rfc/i915_dg2.rst
new file mode 100644
index 000000000000..f4eb5a219897
--- /dev/null
+++ b/Documentation/gpu/rfc/i915_dg2.rst
@@ -0,0 +1,25 @@
+====================
+I915 DG2 RFC Section
+====================
+
+Upstream plan
+=============
+Plan to upstream the DG2 enabling is:
+
+* Merge basic HW enabling for DG2 (Still without pciid)
+* Merge the 64k support for lmem
+* Merge the flat CCS enabling patches
+* Add the pciid for DG2 and enable the DG2 in CI
+
+
+64K page support for lmem
+=========================
+On DG2 hw, local-memory supports minimum GTT page size of 64k only. 4k is not
+supported anymore.
+
+DG2 hw doesn't support the 64k (lmem) and 4k (smem) pages in the same ppgtt
+Page table. Refer the struct drm_i915_gem_create_ext for the implication of
+handling the 64k page size.
+
+.. kernel-doc:: include/uapi/drm/i915_drm.h
+ :functions: drm_i915_gem_create_ext
diff --git a/Documentation/gpu/rfc/index.rst b/Documentation/gpu/rfc/index.rst
index 91e93a705230..afb320ed4028 100644
--- a/Documentation/gpu/rfc/index.rst
+++ b/Documentation/gpu/rfc/index.rst
@@ -20,6 +20,9 @@ host such documentation:
i915_gem_lmem.rst
+.. toctree::
+ i915_dg2.rst
+
.. toctree::
i915_scheduler.rst
--
2.20.1
