[PATCH v6 0/9] Update AUX invalidation sequence

[Andi Shyti]

Ops... sorry... I am realizing that I sent again V6... please
ignore this series!

Andi

On Thu, Jul 20, 2023 at 06:44:45PM +0200, Andi Shyti wrote:
> Hi,
> 
> as there are new hardware directives, we need a little adaptation
> for the AUX invalidation sequence.
> 
> In this version we support all the engines affected by this
> change.
> 
> The stable backport has some challenges because the original
> patch that this series fixes has had more changes in between.
> 
> This patch is slowly exploding with code refactorings and
> features added and fixed.
> 
> Thanks a lot Nirmoy, Andrzej and Matt for your review and for the
> fruitful discussions!
> 
> Thanks,
> Andi
> 
> Changelog:
> =========
> v5 -> v6
>  - Fixed ccs flush in the engines VE and BCS. They are sent as a
>    separate command instead of added in the pipe control.
>  - Separated the CCS flusing in the pipe control patch with the
>    quiescing of the memory. They were meant to be on separate
>    patch already in the previous verision, but apparently I
>    squashed them by mistake.
> 
> v4 -> v5
>  - The AUX CCS is added as a device property instead of checking
>    against FLAT CCS. This adds the new HAS_AUX_CCS check
>    (Patch 2, new).
>  - little and trivial refactoring here and there.
>  - extended the flags{0,1}/bit_group_{0,1} renaming to other
>    functions.
>  - Created an intel_emit_pipe_control_cs() wrapper for submitting
>    the pipe control.
>  - Quiesce memory for all the engines, not just RCS (Patch 6,
>    new).
>  - The PIPE_CONTROL_CCS_FLUSH is added to all the engines.
>  - Remove redundant EMIT_FLUSH_CCS mode flag.
>  - Remove unnecessary NOOPs from the command streamer for
>    invalidating the CCS table.
>  - Use INVALID_MMIO_REG and gen12_get_aux_inv_reg() instad of
>    __MMIO(0) and reg.reg.
>  - Remove useless wrapper and just use gen12_get_aux_inv_reg().
> 
> v3 -> v4
>  - A trivial patch 3 is added to rename the flags with
>    bit_group_{0,1} to align with the datasheet naming.
>  - Patch 4 fixes a confusion I made where the CCS flag was
>    applied to the wrong bit group.
> 
> v2 -> v3
>  - added r-b from Nirmoy in patch 1 and 4.
>  - added patch 3 which enables the ccs_flush in the control pipe
>    for mtl+ compute and render engines.
>  - added redundant checks in patch 2 for enabling the EMIT_FLUSH
>    flag.
> 
> v1 -> v2
>  - add a clean up preliminary patch for the existing registers
>  - add support for more engines
>  - add the Fixes tag
> 
> Andi Shyti (7):
>   drm/i915/gt: Cleanup aux invalidation registers
>   drm/i915: Add the has_aux_ccs device property
>   drm/i915/gt: Rename flags with bit_group_X according to the datasheet
>   drm/i915/gt: Refactor intel_emit_pipe_control_cs() in a single
>     function
>   drm/i915/gt: Ensure memory quiesced before invalidation for all
>     engines
>   drm/i915/gt: Enable the CCS_FLUSH bit in the pipe control
>   drm/i915/gt: Support aux invalidation on all engines
> 
> Jonathan Cavitt (2):
>   drm/i915/gt: Ensure memory quiesced before invalidation
>   drm/i915/gt: Poll aux invalidation register bit on invalidation
> 
>  drivers/gpu/drm/i915/gt/gen8_engine_cs.c     | 222 +++++++++++++------
>  drivers/gpu/drm/i915/gt/gen8_engine_cs.h     |  21 +-
>  drivers/gpu/drm/i915/gt/intel_gpu_commands.h |   2 +
>  drivers/gpu/drm/i915/gt/intel_gt_regs.h      |  16 +-
>  drivers/gpu/drm/i915/gt/intel_lrc.c          |  17 +-
>  drivers/gpu/drm/i915/i915_drv.h              |   1 +
>  drivers/gpu/drm/i915/i915_pci.c              |   5 +-
>  drivers/gpu/drm/i915/intel_device_info.h     |   1 +
>  8 files changed, 186 insertions(+), 99 deletions(-)
> 
> -- 
> 2.40.1