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| author |   Christian König <christian.koenig@amd.com> | 2019-03-05 15:13:52 +0100 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2019-03-19 15:36:58 -0500 |
| commit | 8c65fe5fc81c37c98269389759bb1d90c4658953 (patch) | |
| tree | 5a035d343cd25b005df4abb8543297e7e3cb6222 /drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | |
| parent | drm/amdgpu: enable IH ring 1&2 for Vega20 as well (diff) | |
| download | wireguard-linux-8c65fe5fc81c37c98269389759bb1d90c4658953.tar.xz wireguard-linux-8c65fe5fc81c37c98269389759bb1d90c4658953.zip | |
drm/amdgpu: limit the number of IVs processed at once
Only process a maximum of 32 IVs before writing back the RPTR. This improves
hw handling when we get close to an overflow in the ring buffer.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c index 1c50be3ab8a9..934dfdcb4e73 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c @@ -142,6 +142,7 @@ void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) */ int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) { + unsigned int count = AMDGPU_IH_MAX_NUM_IVS; u32 wptr; if (!ih->enabled || adev->shutdown) @@ -159,7 +160,7 @@ restart_ih: /* Order reading of wptr vs. reading of IH ring data */ rmb(); - while (ih->rptr != wptr) { + while (ih->rptr != wptr && --count) { amdgpu_irq_dispatch(adev, ih); ih->rptr &= ih->ptr_mask; } |