drm/amdkfd: multiple gpu migrate vram to vram

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If prefetch range to gpu with acutal location is another gpu, or GPU
retry fault restore pages to migrate the range with acutal location is
gpu, then migrate from one gpu to another gpu.

Use system memory as bridge because sdma engine may not able to access
another gpu vram, use sdma of source gpu to migrate to system memory,
then use sdma of destination gpu to migrate from system memory to gpu.

Print out gpuid or gpuidx in debug messages.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Felix Kuehling 2021-02-24 23:57:33 -05:00 • committed by Alex Deucher

parent 564d2b92c7

commit 1a3b2b5dca

3 changed files with 87 additions and 15 deletions

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47

drivers/gpu/drm/amd/amdkfd/kfd_migrate.c

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4

drivers/gpu/drm/amd/amdkfd/kfd_migrate.h

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55

drivers/gpu/drm/amd/amdkfd/kfd_svm.c

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