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From 5ac3603bc0d1351418307d4247d7609a685ebf1f Mon Sep 17 00:00:00 2001
From: Trigger Huang <Trigger.Huang@amd.com>
Date: Tue, 30 Apr 2019 22:38:51 +0800
Subject: [PATCH 1860/2940] drm/amdgpu: Rearm IRQ in Vega10 SR-IOV if IRQ lost
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In Multi-VFs stress test, sometimes we see IRQ lost when running
benchmark, just rearm it.
Signed-off-by: Trigger Huang <Trigger.Huang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/amd/amdgpu/vega10_ih.c | 37 +++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
index 1b2f69a9a24e..8d89ab7f0ae8 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
@@ -31,7 +31,7 @@
#include "soc15_common.h"
#include "vega10_ih.h"
-
+#define MAX_REARM_RETRY 10
static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev);
@@ -381,6 +381,38 @@ static void vega10_ih_decode_iv(struct amdgpu_device *adev,
ih->rptr += 32;
}
+/**
+ * vega10_ih_irq_rearm - rearm IRQ if lost
+ *
+ * @adev: amdgpu_device pointer
+ *
+ */
+static void vega10_ih_irq_rearm(struct amdgpu_device *adev,
+ struct amdgpu_ih_ring *ih)
+{
+ uint32_t reg_rptr = 0;
+ uint32_t v = 0;
+ uint32_t i = 0;
+
+ if (ih == &adev->irq.ih)
+ reg_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
+ else if (ih == &adev->irq.ih1)
+ reg_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
+ else if (ih == &adev->irq.ih2)
+ reg_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
+ else
+ return;
+
+ /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
+ for (i = 0; i < MAX_REARM_RETRY; i++) {
+ v = RREG32_NO_KIQ(reg_rptr);
+ if ((v < ih->ring_size) && (v != ih->rptr))
+ WDOORBELL32(ih->doorbell_index, ih->rptr);
+ else
+ break;
+ }
+}
+
/**
* vega10_ih_set_rptr - set the IH ring buffer rptr
*
@@ -395,6 +427,9 @@ static void vega10_ih_set_rptr(struct amdgpu_device *adev,
/* XXX check if swapping is necessary on BE */
*ih->rptr_cpu = ih->rptr;
WDOORBELL32(ih->doorbell_index, ih->rptr);
+
+ if (amdgpu_sriov_vf(adev))
+ vega10_ih_irq_rearm(adev, ih);
} else if (ih == &adev->irq.ih) {
WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, ih->rptr);
} else if (ih == &adev->irq.ih1) {
--
2.17.1
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