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6bea40fc4c
Introduce xe_page_size_alloc_ctrl_mode and add page_size_alloc_ctrl state to struct xe_device along with mutex lock. The new control supports forcing user BO allocations to 2M pages, forcing them to 1G pages, or using a mixed round-robin mode across 4K, 64K, 2M, and 1G page sizes. Track the current mixed-mode index in xe_device so allocation policy can be applied consistently. v2 - make cur_index to atomic as update need in later patch to avoid race/concurency (sashiko) v3 - reworded comments - protect mode/index updates with a mutex for proper concurrency handling v4(sashiko) - move xe_debug_page_size_alloc_ctrl_init() before drm_dev_register(), so mutex and control states are initialized before any userspace visibility v5(Himal) - Guard all the debug page size policy code under CONFIG - Squash Kconfig patch to have Kconfig entry for DEBUG_PAGE_SIZE - Add inline to check debug page size support and exact mode configured if it is supported. v6 (fix CI build) v8 (Himal) - use drmm_mutex_init to avoid leak with mutex_init - call xe_debug_page_size_alloc_ctrl_init unconditionally - Add missed mixed mode check on xe_debug_page_size_mode_not_none check - Add xe_debug_page_size_mode_is_mixed() function v9 - make xe_debug_page_size_alloc_ctrl_init() return int - fail probe if drmm_mutex_init() for page_size_alloc_ctrl.lock fails Signed-off-by: Nareshkumar Gollakoti <naresh.kumar.g@intel.com> Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> Link: https://patch.msgid.link/20260729121843.1255891-2-naresh.kumar.g@intel.com Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>