drm/amdgpu: add ih waiter on process until checkpoint

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Add IH function to allow caller to wait until ring entries are processed
until the checkpoint write pointer.

This will be primarily used by HMM to drain pending page fault interrupts
before memory unmap to prevent HMM from handling stale interrupts.

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jonathan Kim <jonathan.kim@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Jonathan Kim 2021-02-23 15:10:33 -05:00 • committed by Alex Deucher

parent 0dd7953234

commit 3f1d1eb2a2

2 changed files with 54 additions and 0 deletions

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49

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

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5

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

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