[Intel-gfx] [PATCH v2 0/5] Perma-pin uC firmware and re-enable global reset

[Fernando Pacheco]

On 4/18/19 4:31 PM, Fernando Pacheco wrote:
> The intent is to move the GuC and HuC firmware images to the
> top of the address space. This portion is inaccessible during
> normal GuC operations and should be relatively safe to house
> both firmware images. By making the move we can re-enable the
> full gpu reset with GuC enabled.
>
> Placing the firmware images above GUC_GGTT_TOP was discussed
> previously here:
> 	https://patchwork.freedesktop.org/patch/273616/
>
> v2:
> The decision to rename both the uc_fw init and fini functions
> made it easier to pull the bind/unbind operations out of
> intel_guc_fw.* and intel_huc_fw.*. The bind/unbind will now
> take place within the newly repurposed intel_uc_fw_init/fini.
> All other changes should be called out in their respective patches
> and should be the direct result of a review comment.

Chris, I didn't address two of your earlier review comments, so I'll try
to do so here:

1. You are correct about the inline function in the first patch, but I felt that
     could be fixed separate from this series.
2. Your comment on not needing to pin the fw pages made sense to me, but I found that the
    explicit pin/unpin was necessary for the binding. Please let me know if I'm missing
    something here!

Thanks,
Fernando

>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
>
> Fernando Pacheco (5):
>   drm/i915/uc: Rename uC firmware init/fini functions
>   drm/i915/uc: Reserve upper range of GGTT
>   drm/i915/uc: Place uC firmware in upper range of GGTT
>   Revert "drm/i915/guc: Disable global reset"
>   drm/i915/selftests: Check that gpu reset is usable from atomic context
>
>  drivers/gpu/drm/i915/i915_gem.c               |   2 +
>  drivers/gpu/drm/i915/i915_gem_gtt.c           |  25 ++--
>  drivers/gpu/drm/i915/i915_gem_gtt.h           |   1 +
>  drivers/gpu/drm/i915/i915_reset.c             |   3 -
>  drivers/gpu/drm/i915/intel_guc.c              |  58 ++++++++-
>  drivers/gpu/drm/i915/intel_guc.h              |   2 +
>  drivers/gpu/drm/i915/intel_guc_fw.c           |  20 +--
>  drivers/gpu/drm/i915/intel_huc.c              |  74 ++++++++---
>  drivers/gpu/drm/i915/intel_huc.h              |   6 +-
>  drivers/gpu/drm/i915/intel_huc_fw.c           |  49 +++++--
>  drivers/gpu/drm/i915/intel_uc.c               |  39 +++++-
>  drivers/gpu/drm/i915/intel_uc.h               |   1 +
>  drivers/gpu/drm/i915/intel_uc_fw.c            | 122 +++++++++++++-----
>  drivers/gpu/drm/i915/intel_uc_fw.h            |  12 +-
>  .../gpu/drm/i915/selftests/intel_hangcheck.c  |   6 +-
>  15 files changed, 319 insertions(+), 101 deletions(-)
>