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| author | Jonathan Kim <jonathan.kim@amd.com> | 2021-02-23 23:10:33 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-03-24 06:10:57 +0300 |
| commit | 3f1d1eb2a2561383c84b4400352e721876c565e4 (patch) | |
| tree | 068ef61abfde07846ccac1408231bcc5aab1927d /drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h | |
| parent | 0dd795323405680f68cc16a471d19bc3369cc519 (diff) | |
| download | linux-3f1d1eb2a2561383c84b4400352e721876c565e4.tar.xz | |
drm/amdgpu: add ih waiter on process until checkpoint
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h index 6ed4a85fc7c3..87ec6d20dbe0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h @@ -66,6 +66,9 @@ struct amdgpu_ih_ring { unsigned rptr; atomic_t lock; struct amdgpu_ih_regs ih_regs; + + /* For waiting on IH processing at checkpoint. */ + wait_queue_head_t wait_process; }; /* provided by the ih block */ @@ -87,6 +90,8 @@ int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih, void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih); void amdgpu_ih_ring_write(struct amdgpu_ih_ring *ih, const uint32_t *iv, unsigned int num_dw); +int amdgpu_ih_wait_on_checkpoint_process(struct amdgpu_device *adev, + struct amdgpu_ih_ring *ih); int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih); void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih, |