[PATCH v4 0/6] lib/xe/xe_query: implement few query helpers

[Andrzej Hajda <andrzej.hajda@intel.com>]

This patchset adds following helpers to xe_query library:
- xe_hwconfig_get_u32 - to get single value from hwconfig,
  similar helper exists in kernel,
- xe_query_device - encapsulates common code around DRM_IOCTL_XE_DEVICE_QUERY,
- xe_for_each_topology_mask - iterator for blob returned by DRM_XE_DEVICE_QUERY_GT_TOPOLOGY
Beside adding helpers patchset also shows their usefullness.

Cleaner code and diffstat of 85 insertions vs 282 deletions hopefuly
proves usability of these helpers.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
---
Changes in v4:
- removed can_fail arg from xe_query_device and add xe_query_device_may_fail,
- squashed last three patches into one,
- added tags,
- Link to v3: https://lore.kernel.org/r/20251117-xe_query_helpers-v3-0-25d984ae58cb@intel.com

Changes in v3:
- added sanity check for len > 0 in xe_hwconfig_get_u32 (Priyanka),
- in xe_query_device treat returned query.size == 0 as unsupported query,
- with above change allow query for HWCONFIG to fail - case of old platforms (ADL-S),
- added R-B tag for patch 2,
- Link to v2: https://lore.kernel.org/r/20251107-xe_query_helpers-v2-0-ec66ba6af1c1@intel.com

Changes in v2:
- add xe_query_device arg to allow fail without assert,
  because EU_STALL and OA_UNITS are not implemented on old platforms,
- also return NULL if data size is 0 - case of hwconfig on old platforms,
- split first patch to implementation and conversion,
- Link to v1: https://lore.kernel.org/r/20251106-xe_query_helpers-v1-0-d761a944c237@intel.com

---
Andrzej Hajda (6):
      lib/xe_query: add helper to get first value of hwconfig
      tests/intel/xe_eudebug_online: use helper to get hwconfig value
      lib/xe/xe_query: introduce helpers for device query
      lib/xe/xe_query: use recently introduced helper to query device
      lib/xe/xe_query: introduce iterator for GT topology masks
      xe/treewide: use xe_query helpers for query GT topology

 lib/xe/xe_oa.c                  |  37 ++-----
 lib/xe/xe_query.c               | 220 ++++++++++------------------------------
 lib/xe/xe_query.h               |  27 +++++
 tests/intel/xe_eudebug_online.c |  41 +-------
 tests/intel/xe_query.c          |  69 ++++---------
 5 files changed, 111 insertions(+), 283 deletions(-)
---
base-commit: 5aeea13f553d4c5882cf4af9c83c8609265200f1
change-id: 20251106-xe_query_helpers-9a49432d828d

Best regards,
-- 
Andrzej Hajda <andrzej.hajda@intel.com>