[PATCH v6 00/11] use DYNAMIC_DEBUG to implement DRM.debug

[Jim Cromie]

This patchset does 3 main things.

Adds DEFINE_DYNAMIC_DEBUG_CATEGORIES to define bitmap => category
control of pr_debugs, and to create their sysfs entries.

Uses it in amdgpu, i915 to control existing pr_debugs according to
their ad-hoc categorizations.

Plugs dyndbg into drm-debug framework, in a configurable manner.

v6: cleans up per v5 feedback, and adds RFC stuff:

- test_dynamic_debug.ko: uses tracer facility added in v5:8/9
- prototype print-once & rate-limiting

Hopefully adding RFC stuff doesnt distract too much.

Jim Cromie (11):
  moduleparam: add data member to struct kernel_param
  dyndbg: add DEFINE_DYNAMIC_DEBUG_CATEGORIES and callbacks
  i915/gvt: remove spaces in pr_debug "gvt: core:" etc prefixes
  i915/gvt: use DEFINE_DYNAMIC_DEBUG_CATEGORIES to create "gvt:core:"
    etc categories
  amdgpu: use DEFINE_DYNAMIC_DEBUG_CATEGORIES to control categorized
    pr_debugs
  drm_print: add choice to use dynamic debug in drm-debug
  drm_print: instrument drm_debug_enabled
  amdgpu_ucode: reduce number of pr_debug calls
  nouveau: fold multiple DRM_DEBUG_DRIVERs together
  dyndbg: RFC add debug-trace callback, selftest with it. RFC
  dyndbg: RFC add print-once and print-ratelimited features. RFC.

 drivers/gpu/drm/Kconfig                       |  13 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c     | 293 ++++++++-------
 .../gpu/drm/amd/display/dc/core/dc_debug.c    |  44 ++-
 drivers/gpu/drm/drm_print.c                   |  49 ++-
 drivers/gpu/drm/i915/gvt/Makefile             |   4 +
 drivers/gpu/drm/i915/gvt/debug.h              |  18 +-
 drivers/gpu/drm/i915/i915_params.c            |  35 ++
 drivers/gpu/drm/nouveau/nouveau_drm.c         |  36 +-
 include/drm/drm_print.h                       | 148 ++++++--
 include/linux/dynamic_debug.h                 |  81 ++++-
 include/linux/moduleparam.h                   |  11 +-
 lib/Kconfig.debug                             |  11 +
 lib/Makefile                                  |   1 +
 lib/dynamic_debug.c                           | 336 ++++++++++++++++--
 lib/test_dynamic_debug.c                      | 279 +++++++++++++++
 15 files changed, 1117 insertions(+), 242 deletions(-)
 create mode 100644 lib/test_dynamic_debug.c

-- 
2.31.1