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List: mesa3d-dev
Subject: [Mesa-dev] [PATCH v3 17/17] Doc/gpu/rfc/i915: i915 DG2 uAPI
From: Ramalingam C <ramalingam.c () intel ! com>
Date: 2021-10-27 21:35:39
Message-ID: 20211027212339.29259-18-ramalingam.c () intel ! com
[Download RAW message or body]
Details of the new features getting added as part of DG2 enabling and their
implicit impact on the uAPI.
v2: improvised the Flat-CCS documentation [Danvet & CQ]
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
cc: Daniel Vetter <daniel.vetter@ffwll.ch>
cc: Matthew Auld <matthew.auld@intel.com>
cc: Simon Ser <contact@emersion.fr>
cc: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Kenneth Graunke <kenneth@whitecape.org>
Cc: mesa-dev@lists.freedesktop.org
Cc: Tony Ye <tony.ye@intel.com>
Cc: Slawomir Milczarek <slawomir.milczarek@intel.com>
---
Documentation/gpu/rfc/i915_dg2.rst | 32 ++++++++++++++++++++++++++++++
Documentation/gpu/rfc/index.rst | 3 +++
2 files changed, 35 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..9d28b1812bc7
--- /dev/null
+++ b/Documentation/gpu/rfc/i915_dg2.rst
@@ -0,0 +1,32 @@
+====================
+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
+
+
+Flat CCS support for lmem
+=========================
+
+.. kernel-doc:: drivers/gpu/drm/i915/gt/intel_migrate.c
+ :doc: Flat-CCS - Memory compression for Local memory
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
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