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drm/amdgpu: Rearm IRQ in Vega10 SR-IOV if IRQ lost

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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>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Trigger Huang 2019-04-30 22:38:51 +08:00 committed by Alex Deucher
parent bdb1ccb080
commit 74dcfe74b4
1 changed files with 36 additions and 1 deletions
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37
drivers/gpu/drm/amd/amdgpu/vega10_ih.c
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@ -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) {