drm/amdgpu: introduce a new parameter to configure how many KCQ we want(v5)

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what:
the MQD's save and restore of KCQ (kernel compute queue)
cost lots of clocks during world switch which impacts a lot
to multi-VF performance

how:
introduce a paramter to control the number of KCQ to avoid
performance drop if there is no kernel compute queue needed

notes:
this paramter only affects gfx 8/9/10

v2:
refine namings

v3:
choose queues for each ring to that try best to cross pipes evenly.

v4:
fix indentation
some cleanupsin the gfx_compute_queue_acquire()

v5:
further fix on indentations
more cleanupsin gfx_compute_queue_acquire()

TODO:
in the future we will let hypervisor driver to set this paramter
automatically thus no need for user to configure it through
modprobe in virtual machine

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Monk Liu 2020-07-27 15:20:12 +08:00 • committed by Alex Deucher

parent 9b856defbe

commit a300de40f6

7 changed files with 76 additions and 73 deletions

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1

drivers/gpu/drm/amd/amdgpu/amdgpu.h

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5

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

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4

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

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45

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c

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32

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

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29

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

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31

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

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