Hi, This patch series introduces static load balancing for GPUs with multiple compute engines. It's a lengthy series, and some challenging aspects still need to be resolved. I have tried to split the work as much as possible to facilitate the review process. To summarize, in patches 1 to 10, no functional changes occur except for the addition of the num_cslices interface. The significant changes happen in patch 11, which is the core part of the CCS mode setting, utilizing the groundwork laid in the earlier patches. Compared to the first version I've taken a completely different approach to adding and removing engines. in v1 physical engines were directly added and removed, along with the memory allocated to them, each time the user changed the CCS mode. In this updated approach, the focus is now on managing the UABI engine list, which controls the engines exposed to userspace. Instead of manipulating phuscal engines and their memory, we now handle engine exposure through this list. I would greatly appreciate further input from all reviewers who have already assisted with the previous work. IGT tests have also been developed, but I haven't sent them yet. Thank you Chris for the offline reviews. Thanks, Andi Changelog ========= v1 -> v2: - Changed engine dynamic creation and removal as described above. Andi Shyti (11): drm/i915/gt: Move the CCS mode variable to a global position drm/i915/gt: Allow the creation of multi-mode CCS masks drm/i915/gt: Refactor uabi engine class/instance list creation drm/i915/gt: Manage CCS engine creation within UABI exposure drm/i915/gt: Remove cslices mask value from the CCS structure drm/i915/gt: Expose the number of total CCS slices drm/i915/gt: Store engine-related sysfs kobjects drm/i915/gt: Store active CCS mask drm/i915/gt: Isolate single sysfs engine file creation drm/i915/gt: Implement creation and removal routines for CCS engines drm/i915/gt: Allow the user to change the CCS mode through sysfs drivers/gpu/drm/i915/gt/intel_engine_cs.c | 23 -- drivers/gpu/drm/i915/gt/intel_engine_types.h | 3 + drivers/gpu/drm/i915/gt/intel_engine_user.c | 49 +++- drivers/gpu/drm/i915/gt/intel_gt.c | 3 + drivers/gpu/drm/i915/gt/intel_gt_ccs_mode.c | 287 +++++++++++++++++-- drivers/gpu/drm/i915/gt/intel_gt_ccs_mode.h | 6 +- drivers/gpu/drm/i915/gt/intel_gt_sysfs.c | 2 + drivers/gpu/drm/i915/gt/intel_gt_types.h | 18 +- drivers/gpu/drm/i915/gt/intel_workarounds.c | 7 +- drivers/gpu/drm/i915/gt/sysfs_engines.c | 75 +++-- drivers/gpu/drm/i915/gt/sysfs_engines.h | 2 + drivers/gpu/drm/i915/i915_drv.h | 1 + 12 files changed, 385 insertions(+), 91 deletions(-) -- 2.45.2
