[PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi

[PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi

[HaiJun Chang]

Cp wptr in wb buffer is outdated after VF FLR.
The outdated wptr may cause cp to execute unexpected packets.
Reset cp wptr in wb buffer.

Signed-off-by: HaiJun Chang <HaiJun.Chang@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index d126d66..13363f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3107,6 +3107,7 @@ static int gfx_v10_0_gfx_init_queue(struct amdgpu_ring *ring)
 			memcpy(mqd, adev->gfx.me.mqd_backup[AMDGPU_MAX_GFX_RINGS], sizeof(*mqd));
 		/* reset the ring */
 		ring->wptr = 0;
+		adev->wb.wb[ring->wptr_offs] = 0;
 		amdgpu_ring_clear_ring(ring);
 #ifdef BRING_UP_DEBUG
 		mutex_lock(&adev->srbm_mutex);
-- 
2.7.4

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[PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi

[HaiJun Chang]

Cp wptr in wb buffer is outdated after VF FLR.
The outdated wptr may cause cp to execute unexpected packets.
Reset cp wptr in wb buffer.

Signed-off-by: HaiJun Chang <HaiJun.Chang@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index d126d66..13363f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3107,6 +3107,7 @@ static int gfx_v10_0_gfx_init_queue(struct amdgpu_ring *ring)
 			memcpy(mqd, adev->gfx.me.mqd_backup[AMDGPU_MAX_GFX_RINGS], sizeof(*mqd));
 		/* reset the ring */
 		ring->wptr = 0;
+		adev->wb.wb[ring->wptr_offs] = 0;
 		amdgpu_ring_clear_ring(ring);
 #ifdef BRING_UP_DEBUG
 		mutex_lock(&adev->srbm_mutex);
-- 
2.7.4

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Re: [PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi

[Deucher, Alexander]

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Acked-by: Alex Deucher <alexander.deucher-5C7GfCeVMHo@public.gmane.org>
________________________________
From: amd-gfx <amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org> on behalf of HaiJun Chang <HaiJun.Chang-5C7GfCeVMHo@public.gmane.org>
Sent: Tuesday, October 29, 2019 5:18 AM
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org <amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
Cc: Chang, HaiJun <HaiJun.Chang-5C7GfCeVMHo@public.gmane.org>
Subject: [PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi

Cp wptr in wb buffer is outdated after VF FLR.
The outdated wptr may cause cp to execute unexpected packets.
Reset cp wptr in wb buffer.

Signed-off-by: HaiJun Chang <HaiJun.Chang-5C7GfCeVMHo@public.gmane.org>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index d126d66..13363f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3107,6 +3107,7 @@ static int gfx_v10_0_gfx_init_queue(struct amdgpu_ring *ring)
                         memcpy(mqd, adev->gfx.me.mqd_backup[AMDGPU_MAX_GFX_RINGS], sizeof(*mqd));
                 /* reset the ring */
                 ring->wptr = 0;
+               adev->wb.wb[ring->wptr_offs] = 0;
                 amdgpu_ring_clear_ring(ring);
 #ifdef BRING_UP_DEBUG
                 mutex_lock(&adev->srbm_mutex);
--
2.7.4

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Re: [PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi

[Deucher, Alexander]

[-- Attachment #1.1: Type: text/plain, Size: 1504 bytes --]

Acked-by: Alex Deucher <alexander.deucher@amd.com>
________________________________
From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of HaiJun Chang <HaiJun.Chang@amd.com>
Sent: Tuesday, October 29, 2019 5:18 AM
To: amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org>
Cc: Chang, HaiJun <HaiJun.Chang@amd.com>
Subject: [PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi

Cp wptr in wb buffer is outdated after VF FLR.
The outdated wptr may cause cp to execute unexpected packets.
Reset cp wptr in wb buffer.

Signed-off-by: HaiJun Chang <HaiJun.Chang@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index d126d66..13363f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3107,6 +3107,7 @@ static int gfx_v10_0_gfx_init_queue(struct amdgpu_ring *ring)
                         memcpy(mqd, adev->gfx.me.mqd_backup[AMDGPU_MAX_GFX_RINGS], sizeof(*mqd));
                 /* reset the ring */
                 ring->wptr = 0;
+               adev->wb.wb[ring->wptr_offs] = 0;
                 amdgpu_ring_clear_ring(ring);
 #ifdef BRING_UP_DEBUG
                 mutex_lock(&adev->srbm_mutex);
--
2.7.4

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