[PATCH v10 0/3] CCS save restore for IGPU

[Satyanarayana K V P]

Prior IGPU design had compression supported in GPU VA domain. For
Virtualization, this makes compression Meta data save/restore for VF as
not necessary (i.e. Compression Meta data space is automatically
save/restore with normal guest/VM memory).

With latest Xe2 architecture, compression is supported by Flat, physical
domain. Meta data/compression control surface (Aka CCS) and association
is in physical domain and data is located in BIOS/firmware-reserved CCS
pool. In virtualization/SRIOV when VF save/restore now have to account for
save/restore VF associated CCS. Without this feature any restore of
compressed resource in IGPU VF domain will have corruption as Meta data
will not be restore correctly as a part of VF save/restore flow. Making it
must have/functional feature if we are supporting compression and
Save/restore of VF on IGPU platform.

This is the first in series which adds support for CCS save/restore for
IGPU.

V9 -> V10:
- Fixed review comments (atthew Brost).

V8 -> V9:
- Fixed review comments (atthew Brost).
- Removed MI_INVALIDATE_TLB after emitting PTEs (Matthew Brost).
- Initialized CCS read write contexts for only root tile (Matthew Brost).

V7 -> V8:
- Fixed review comments (atthew Brost).
- Removed xe_bb_ccs_realloc() and allocated a single BB by calculating BB
size first and then commands are emitted to BB.

V6 -> V7:
- Fixed review comments (Michal Wajdeczko & Matthew Brost).
- Created xe_bb_ccs_realloc() to create a single BB instead of maintaining
a list. (Matthew Brost)
- Replaced xe_tile_migrate_exec_queue() with xe_migrate_exec_queue() as per
review comments (Matthew Brost).

V5 -> V6:
- Removed dead code from xe_migrate_ccs_rw_copy() function (Matthew Brost)
- Added id field in the xe_tile_vf_ccs structure for self identification.

V4 -> V5:
- Modified read/write contexts to enums from #defines (Matthew Brost).
- The CCS BB pool size is calculated based on the system memory size
(Michal Wajdeczko & Matthew Brost).
- Fixed review comments (Matthew Brost & Matthew Auld)
- Create a list of BBs for the given BO and fixed memory leak while
detaching BOs. (Matthew Brost).
- Yet to cleanup xe_migrate_ccs_rw_copy() function.

V3 -> V4:
- Fixed issues reported by patchworks.

V2 -> V3:
- Added new variable which denotes the initialization of contexts.
- Attach and detach functions check for IS_VF_CCS_READY().
- Made xe_migrate structure private as per review comments.
- Created new xe_migrate functions to get lrc and exec_queue.

V1 -> V2:
- Fixed review comments.


Satyanarayana K V P (3):
  drm/xe/vf: Create contexts for CCS read write
  drm/xe/vf: Attach and detach CCS copy commands with BO
  drm/xe/vf: Register CCS read/write contexts with Guc

 drivers/gpu/drm/xe/Makefile                |   1 +
 drivers/gpu/drm/xe/xe_bb.c                 |  35 ++
 drivers/gpu/drm/xe/xe_bb.h                 |   3 +
 drivers/gpu/drm/xe/xe_bo.c                 |  23 ++
 drivers/gpu/drm/xe/xe_bo_types.h           |   3 +
 drivers/gpu/drm/xe/xe_device.c             |   4 +
 drivers/gpu/drm/xe/xe_device_types.h       |   4 +
 drivers/gpu/drm/xe/xe_gt_debugfs.c         |  39 +++
 drivers/gpu/drm/xe/xe_guc_fwif.h           |   5 +
 drivers/gpu/drm/xe/xe_guc_submit.c         |  34 +-
 drivers/gpu/drm/xe/xe_guc_submit.h         |   1 +
 drivers/gpu/drm/xe/xe_migrate.c            | 164 ++++++++-
 drivers/gpu/drm/xe/xe_migrate.h            |  10 +-
 drivers/gpu/drm/xe/xe_pm.c                 |   4 +
 drivers/gpu/drm/xe/xe_sriov.c              |  19 ++
 drivers/gpu/drm/xe/xe_sriov.h              |   1 +
 drivers/gpu/drm/xe/xe_sriov_types.h        |   5 +
 drivers/gpu/drm/xe/xe_sriov_vf_ccs.c       | 366 +++++++++++++++++++++
 drivers/gpu/drm/xe/xe_sriov_vf_ccs.h       |  17 +
 drivers/gpu/drm/xe/xe_sriov_vf_ccs_types.h |  53 +++
 drivers/gpu/drm/xe/xe_vm.c                 |   6 +-
 21 files changed, 777 insertions(+), 20 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_sriov_vf_ccs.c
 create mode 100644 drivers/gpu/drm/xe/xe_sriov_vf_ccs.h
 create mode 100644 drivers/gpu/drm/xe/xe_sriov_vf_ccs_types.h

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2.43.0