[PATCH v6 0/8] drm/xe/guc: Add GuC based register capture for error capture

[Souza, Jose]

On Fri, 2024-03-22 at 09:57 -0700, José Roberto de Souza wrote:
> On Tue, 2024-03-19 at 07:36 -0700, Zhanjun Dong wrote:
> > Port GuC based register capture for error capture from i915 to Xe.
> > 
> > There are 3 parts inside:
> > . Prepare for capture registers
> >     There is a bo create at guc ads init time, that is very early
> >     and engi  ne map is not ready, make it hard to calculate the
> >     capture buffer size, new function created for worst case size
> >     caluation. Other than that, this part basically follows the i915
> >     design.
> > . Process capture notification message
> >     Basically follows i915 design
> > . Sysfs command process.
> >     Xe switched to devcoredump, adopted command line process with
> >     captured node list.
> 
> Just some notes after trying this to debug a issue with this series:
> 
> - CONFIG_DRM_XE_CAPTURE_ERROR is not a good name for a config to enable GuC based capture.
> 	- in my opinion this should not even exist, always capture with GuC if xe_device_uc_enabled() is true. 
> 
> - coredump don't have some registers like SAMPLER_INSTDONE, ROW_INSTDONE, XEHPG_INSTDONE_GEOM_SVG...
> Here the output in LNL:

ah this could explain...

[  152.189386] xe 0000:00:02.0: [drm:xe_hw_engine_snapshot_from_capture [xe]] GT0: GuC error capture is empty, take snapshot from engine.
[  152.190215] xe 0000:00:02.0: [drm] Xe device coredump has been created

but both code paths needs to dump the same registers

> 
> **** HW Engines ****
> rcs0 (physical), logical instance=0
> 	Forcewake: domain 0x2, ref 1
> 	HWSTAM: 0xffffffff
> 	RING_HWS_PGA: 0x01693000
> 	RING_START: 0x029d5000
> 	RING_HEAD: 0x00001914
> 	RING_TAIL: 0x00001968
> 	RING_CTL: 0x00003001
> 	RING_MI_MODE: 0x00001000
> 	RING_MODE: 0x00000008
> 	RING_IMR: 0x00000000
> 	RING_ESR: 0x00000000
> 	RING_EMR: 0xffffffff
> 	RING_EIR: 0x00000000
> 	IPEHR: 0x7a000004
> 	ACTHD: 0x0000effeffff9208
> 	RING_BBADDR: 0x0000effeffff9209
> 	RING_DMA_FADD: 0x00000000029d6968
> 	RING_EXECLIST_STATUS: 0x000000004000279c
> 	RING_EXECLIST_SQ_CONTENTS: 0x00000000029d9719
> 
> - a lot of style issues, see 'CI.checkpatch'
> 
> > 
> > Signed-off-by: Zhanjun Dong <zhanjun.dong at intel.com>
> > Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
> > 
> > Changes from prior revs:
> >   v6:-  Change hardcoded register snapshot fill to follow mapping tables
> >         When capture is empty, take snapshot from engine
> >   v5:-  Split dss helper code out as an standalone patch
> >         Remove old platform registers definition.
> >         Split register map table to 32 and 64bit each
> >   v4:-  Move register map table to xe_hw_engine.c
> >   v3:-  Remove condition compilation in code
> >   v2:-  Split into multiple chunks
> > 
> > Zhanjun Dong (8):
> >   drm/xe/guc: Add kconfig for GuC based register capture
> >   drm/xe/guc: Update GuC ADS size for error capture
> >   drm/xe/guc: Add XE_LP steered register lists
> >   drm/xe/guc: Add capture size check in GuC log buffer
> >   drm/xe/guc: Check sizing of guc_capture output
> >   drm/xe/guc: Extract GuC error capture lists on G2H notification
> >   drm/xe/guc: Pre-allocate output nodes for extraction
> >   drm/xe/guc: Plumb GuC-capture into dev coredump
> > 
> >  drivers/gpu/drm/xe/Kconfig               |   11 +
> >  drivers/gpu/drm/xe/Makefile              |    1 +
> >  drivers/gpu/drm/xe/abi/guc_actions_abi.h |    7 +
> >  drivers/gpu/drm/xe/regs/xe_gt_regs.h     |    5 +
> >  drivers/gpu/drm/xe/xe_gt_printk.h        |    3 +
> >  drivers/gpu/drm/xe/xe_guc.c              |    6 +
> >  drivers/gpu/drm/xe/xe_guc_ads.c          |  229 +++-
> >  drivers/gpu/drm/xe/xe_guc_ads_types.h    |    2 +
> >  drivers/gpu/drm/xe/xe_guc_capture.c      | 1332 ++++++++++++++++++++++
> >  drivers/gpu/drm/xe/xe_guc_capture.h      |   21 +
> >  drivers/gpu/drm/xe/xe_guc_capture_fwif.h |  221 ++++
> >  drivers/gpu/drm/xe/xe_guc_ct.c           |    2 +
> >  drivers/gpu/drm/xe/xe_guc_fwif.h         |   68 ++
> >  drivers/gpu/drm/xe/xe_guc_log.c          |  179 +++
> >  drivers/gpu/drm/xe/xe_guc_log.h          |   15 +
> >  drivers/gpu/drm/xe/xe_guc_log_types.h    |   26 +
> >  drivers/gpu/drm/xe/xe_guc_submit.c       |   21 +-
> >  drivers/gpu/drm/xe/xe_guc_submit.h       |    3 +
> >  drivers/gpu/drm/xe/xe_guc_types.h        |    2 +
> >  drivers/gpu/drm/xe/xe_hw_engine.c        |  261 ++++-
> >  drivers/gpu/drm/xe/xe_hw_engine.h        |    4 +
> >  drivers/gpu/drm/xe/xe_hw_engine_types.h  |  117 +-
> >  22 files changed, 2421 insertions(+), 115 deletions(-)
> >  create mode 100644 drivers/gpu/drm/xe/xe_guc_capture.c
> >  create mode 100644 drivers/gpu/drm/xe/xe_guc_capture.h
> >  create mode 100644 drivers/gpu/drm/xe/xe_guc_capture_fwif.h
> > 
>