From 00ecd8a27c03b6dd463ab8755dd6d58751d76297 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Sat, 26 Aug 2017 02:40:45 -0400
Subject: drm/amdgpu: Add prescreening stage in IH processing (v2)
To filter out high-frequency interrupts that can be safely ignored.
v2: squash in trivial typo fix for si (Alex)
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 6 ++++++
1 file changed, 6 insertions(+)
(limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c')
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
index 3ab4c65ecc8b..c834a40cfad6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
@@ -169,6 +169,12 @@ restart_ih:
while (adev->irq.ih.rptr != wptr) {
u32 ring_index = adev->irq.ih.rptr >> 2;
+ /* Prescreening of high-frequency interrupts */
+ if (!amdgpu_ih_prescreen_iv(adev)) {
+ adev->irq.ih.rptr &= adev->irq.ih.ptr_mask;
+ continue;
+ }
+
/* Before dispatching irq to IP blocks, send it to amdkfd */
amdgpu_amdkfd_interrupt(adev,
(const void *) &adev->irq.ih.ring[ring_index]);
--
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