linux-next.git/drivers/gpu/drm/xe/xe_debugfs.h, branch master

drm/xe: Add fault-inject based VRAM page offline injection

2026-09-04T05:30:16+00:00

Add a fault-inject based debugfs interface for testing VRAM page offlining. This replaces the previous standalone debugfs approach with the standard kernel fault-inject infrastructure. Two debugfs entries are created under the xe debugfs root for CRI platforms: - inject_mempage_offline/: Standard fault-inject knobs (probability, times, interval, etc.) created by fault_create_debugfs_attr(). Without CONFIG_FAULT_INJECTION_DEBUG_FS, the stub returns ERR_PTR(-ENODEV) and no knobs are created, making the trigger effectively a no-op. - inject_mempage_offline_trigger: Write a PFN value to inject a specific page, or write "0" to auto-pick the last unallocated VRAM page The trigger accepts: - "0" : auto-pick last unallocated page - "0xPFN" : inject fault at a specific PFN address Usage: echo 100 > inject_mempage_offline/probability echo 1 > inject_mempage_offline/times echo 0 > inject_mempage_offline_trigger probability: likelihood of should_fail() returning true (0-100) times: number of times injection is allowed (-1 for unlimited) v7: - Use PAGE_SIZE v6(Himal): - Add warning to rebind driver post test run v5(Sashiko): - exclude SRIOV and remove dpa_base addition, already absolute dpa v4(Himal): - Use xe_fault_mempage_offline() instead of IS_ENABLED() + direct should_fail(). CONFIG_FAULT_INJECTION_DEBUG_FS is now an implicit requirement for the trigger to function. v3(Himal): - Use FAULT_ACTION v2(sashiko): - use cond_resched() - validate input first and fix addr < 0 case - validate vr, move block, found var as local to scope_guard Reviewed-by: Himal Prasad Ghimiray Signed-off-by: Tejas Upadhyay Signed-off-by: Matthew Brost Link: https://patch.msgid.link/20260903161553.528932-32-tejas.upadhyay@intel.com

drm/xe/ras: Use fault-inject to trigger cold-reset wedge

2026-08-13T13:42:26+00:00

Use the fault-inject framework to trigger the cold-reset wedge path (punit_error_handler()) for testing the wedge/recovery flow. Usage: echo 100 > .../wedge_cold_reset/probability echo 1 > .../wedge_cold_reset/times Signed-off-by: Mallesh Koujalagi Reviewed-by: Raag Jadav Link: https://patch.msgid.link/20260805071152.1225416-10-mallesh.koujalagi@intel.com Signed-off-by: Rodrigo Vivi

drm/xe: Consolidate debugfs fault injection functions

2026-07-16T04:45:25+00:00

The fault injection code was scattered: the GT reset hook lived in xe_gt.h as an inline function with its own global variable, the CSC hook had a separate global in xe_hw_error.c with an extern declaration, and each was individually registered in xe_debugfs.c. Adding a new error type meant editing many files and copy-pasting the same boilerplate. Debugfs interface (under /sys/kernel/debug/dri/0/): - fail_gt_reset - GT reset failure - inject_csc_hw_error - CSC firmware error Signed-off-by: Mallesh Koujalagi Reviewed-by: Riana Tauro Link: https://patch.msgid.link/20260715085159.424040-2-mallesh.koujalagi@intel.com Signed-off-by: Riana Tauro

drm/xe: Allow to compile out debugfs

2024-08-10T04:15:14+00:00

Use a dummy xe_debugfs_register() if debugfs is not enabled and move all debugfs-related files under `ifeq ($(CONFIG_DEBUG_FS),y)` in the Makefile. This is similar to what was done for display in commit 439987f6f471 ("drm/xe: don't build debugfs files when CONFIG_DEBUG_FS=n"). This removes the following warning while loading xe with CONFIG_DEUBG_FS=n: xe 0000:03:00.0: [drm] Create GT directory failed Reviewed-by: Nirmoy Das Reviewed-by: Matthew Brost Link: https://patchwork.freedesktop.org/patch/msgid/20240808171121.2484237-1-lucas.demarchi@intel.com Signed-off-by: Lucas De Marchi

drm/xe: Introduce a new DRM driver for Intel GPUs

2023-12-12T19:05:48+00:00

Xe, is a new driver for Intel GPUs that supports both integrated and discrete platforms starting with Tiger Lake (first Intel Xe Architecture). The code is at a stage where it is already functional and has experimental support for multiple platforms starting from Tiger Lake, with initial support implemented in Mesa (for Iris and Anv, our OpenGL and Vulkan drivers), as well as in NEO (for OpenCL and Level0). The new Xe driver leverages a lot from i915. As for display, the intent is to share the display code with the i915 driver so that there is maximum reuse there. But it is not added in this patch. This initial work is a collaboration of many people and unfortunately the big squashed patch won't fully honor the proper credits. But let's get some git quick stats so we can at least try to preserve some of the credits: Co-developed-by: Matthew Brost Co-developed-by: Matthew Auld Co-developed-by: Matt Roper Co-developed-by: Thomas Hellström Co-developed-by: Francois Dugast Co-developed-by: Lucas De Marchi Co-developed-by: Maarten Lankhorst Co-developed-by: Philippe Lecluse Co-developed-by: Nirmoy Das Co-developed-by: Jani Nikula Co-developed-by: José Roberto de Souza Co-developed-by: Rodrigo Vivi Co-developed-by: Dave Airlie Co-developed-by: Faith Ekstrand Co-developed-by: Daniel Vetter Co-developed-by: Mauro Carvalho Chehab Signed-off-by: Rodrigo Vivi Signed-off-by: Matthew Brost