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* [PATCH v2 0/4] Introduce PF-mem VRAM regions
@ 2026-08-21  9:45 Piórkowski, Piotr
  2026-08-21  9:45 ` [PATCH v2 1/4] drm/xe/vram: Add binding information to " Piórkowski, Piotr
                   ` (8 more replies)
  0 siblings, 9 replies; 12+ messages in thread
From: Piórkowski, Piotr @ 2026-08-21  9:45 UTC (permalink / raw)
  To: intel-xe; +Cc: Piotr Piórkowski

From: Piotr Piórkowski <piotr.piorkowski@intel.com>

This series lays the groundwork for PF-mem regions: VRAM regions
dedicated to kernel-only allocations, where buffers are allocated
exclusively by the kernel driver and are never exposed to userspace
workloads.

Today a tile exposes a single VRAM region shared by both kernel and
userspace allocations. Some use cases need a separate VRAM region
carved out of a tile and reserved for the kernel driver only. For
example, on an SR-IOV PF most of the tile VRAM is provisioned to VFs;
the kernel driver still needs its own allocations, which must come from
a region reserved for the kernel and kept apart from the VRAM handed
out to VFs. That reserved kernel region is what PF-mem provides.

To support this, the VRAM region abstraction needs a way to distinguish
regions by purpose, dedicated TTM placements so the BO paths can route
and evict such buffers correctly, and helpers to create a region from a
caller-provided parent, offset, and size.

v1 -> v2:
 - Add comments explaining why PF-mem is excluded from user BO eviction
   (Sashiko).
 - Resolve xe_ttm_vram_mgr_alloc_sgt() physical address via
   xe_map_resource_to_region() instead of the tile's
   VRAM region (Sashiko).
 - Enforce page alignment on offset/size and guard against a NULL
   parent BAR mapping (Sashiko)

Piotr Piórkowski (4):
  drm/xe/vram: Add binding information to VRAM regions
  drm/xe/ttm: Add PF-mem VRAM placement types for TTM
  drm/xe/vram: Add initial support for PF-mem regions
  drm/xe/kunit: Add tests for PF-mem regions

 drivers/gpu/drm/xe/tests/xe_vram.c   | 115 +++++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_bo.c           |  16 +++-
 drivers/gpu/drm/xe/xe_bo.h           |  17 ++++
 drivers/gpu/drm/xe/xe_bo_evict.c     |   7 +-
 drivers/gpu/drm/xe/xe_pm.c           |   4 +-
 drivers/gpu/drm/xe/xe_res_cursor.h   |   9 ++-
 drivers/gpu/drm/xe/xe_tile.c         |  10 ++-
 drivers/gpu/drm/xe/xe_ttm_vram_mgr.c |   9 +--
 drivers/gpu/drm/xe/xe_vram.c         |  90 +++++++++++++++++++--
 drivers/gpu/drm/xe/xe_vram.h         |  10 ++-
 drivers/gpu/drm/xe/xe_vram_types.h   |  14 +++-
 11 files changed, 275 insertions(+), 26 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/tests/xe_vram.c

-- 
2.34.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2026-08-21 11:43 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-08-21  9:45 [PATCH v2 0/4] Introduce PF-mem VRAM regions Piórkowski, Piotr
2026-08-21  9:45 ` [PATCH v2 1/4] drm/xe/vram: Add binding information to " Piórkowski, Piotr
2026-08-21  9:54   ` sashiko-bot
2026-08-21  9:45 ` [PATCH v2 2/4] drm/xe/ttm: Add PF-mem VRAM placement types for TTM Piórkowski, Piotr
2026-08-21  9:46 ` [PATCH v2 3/4] drm/xe/vram: Add initial support for PF-mem regions Piórkowski, Piotr
2026-08-21  9:46 ` [PATCH v2 4/4] drm/xe/kunit: Add tests " Piórkowski, Piotr
2026-08-21  9:54   ` sashiko-bot
2026-08-21  9:52 ` ✗ CI.checkpatch: warning for Introduce PF-mem VRAM regions (rev2) Patchwork
2026-08-21  9:53 ` ✓ CI.KUnit: success " Patchwork
2026-08-21 10:16 ` [PATCH v2 0/4] Introduce PF-mem VRAM regions Matthew Auld
2026-08-21 10:33 ` ✓ Xe.CI.BAT: success for Introduce PF-mem VRAM regions (rev2) Patchwork
2026-08-21 11:43 ` ✓ Xe.CI.FULL: " Patchwork

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