Re: [RFC v4 04/11] drm/amd/virt: For SRIOV send GPU reset directly to TDR queue.

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Am 09.02.22 um 01:23 schrieb Andrey Grodzovsky:
No need to to trigger another work queue inside the work queue.

v3:

Problem:
Extra reset caused by host side FLR notification
following guest side triggered reset.
Fix: Preven qeuing flr_work from mailbox irq if guest
already executing a reset.

Suggested-by: Liu Shaoyun <Shaoyun.Liu@xxxxxxx>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>

Feel free to add an Acked-by: Christian König <christian.koenig@xxxxxxx>, but an rb from somebody more familiar with the code would be better.

Regards,
Christian.

---
  drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c | 9 ++++++---
  drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c | 9 ++++++---
  drivers/gpu/drm/amd/amdgpu/mxgpu_vi.c | 9 ++++++---
  3 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
index 56da5ab82987..5869d51d8bee 100644
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
@@ -282,7 +282,7 @@ static void xgpu_ai_mailbox_flr_work(struct work_struct *work)
  	if (amdgpu_device_should_recover_gpu(adev)
  		&& (!amdgpu_device_has_job_running(adev) ||
  		adev->sdma_timeout == MAX_SCHEDULE_TIMEOUT))
-		amdgpu_device_gpu_recover(adev, NULL);
+		amdgpu_device_gpu_recover_imp(adev, NULL);
  }
static int xgpu_ai_set_mailbox_rcv_irq(struct amdgpu_device *adev,
@@ -307,8 +307,11 @@ static int xgpu_ai_mailbox_rcv_irq(struct amdgpu_device *adev,
switch (event) {
  		case IDH_FLR_NOTIFICATION:
-		if (amdgpu_sriov_runtime(adev))
-			schedule_work(&adev->virt.flr_work);
+		if (amdgpu_sriov_runtime(adev) && !amdgpu_in_reset(adev))
+			WARN_ONCE(!queue_work(adev->reset_domain.wq,
+					      &adev->virt.flr_work),
+				  "Failed to queue work! at %s",
+				  __func__);
  		break;
  		case IDH_QUERY_ALIVE:
  			xgpu_ai_mailbox_send_ack(adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
index 477d0dde19c5..5728a6401d73 100644
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
@@ -309,7 +309,7 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
  		adev->gfx_timeout == MAX_SCHEDULE_TIMEOUT ||
  		adev->compute_timeout == MAX_SCHEDULE_TIMEOUT ||
  		adev->video_timeout == MAX_SCHEDULE_TIMEOUT))
-		amdgpu_device_gpu_recover(adev, NULL);
+		amdgpu_device_gpu_recover_imp(adev, NULL);
  }
static int xgpu_nv_set_mailbox_rcv_irq(struct amdgpu_device *adev,
@@ -337,8 +337,11 @@ static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
switch (event) {
  	case IDH_FLR_NOTIFICATION:
-		if (amdgpu_sriov_runtime(adev))
-			schedule_work(&adev->virt.flr_work);
+		if (amdgpu_sriov_runtime(adev) && !amdgpu_in_reset(adev))
+			WARN_ONCE(!queue_work(adev->reset_domain.wq,
+					      &adev->virt.flr_work),
+				  "Failed to queue work! at %s",
+				  __func__);
  		break;
  		/* READY_TO_ACCESS_GPU is fetched by kernel polling, IRQ can ignore
  		 * it byfar since that polling thread will handle it,
diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_vi.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_vi.c
index aef9d059ae52..02290febfcf4 100644
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_vi.c
@@ -521,7 +521,7 @@ static void xgpu_vi_mailbox_flr_work(struct work_struct *work)
/* Trigger recovery due to world switch failure */
  	if (amdgpu_device_should_recover_gpu(adev))
-		amdgpu_device_gpu_recover(adev, NULL);
+		amdgpu_device_gpu_recover_imp(adev, NULL);
  }
static int xgpu_vi_set_mailbox_rcv_irq(struct amdgpu_device *adev,
@@ -550,8 +550,11 @@ static int xgpu_vi_mailbox_rcv_irq(struct amdgpu_device *adev,
  		r = xgpu_vi_mailbox_rcv_msg(adev, IDH_FLR_NOTIFICATION);
/* only handle FLR_NOTIFY now */
-		if (!r)
-			schedule_work(&adev->virt.flr_work);
+		if (!r && !amdgpu_in_reset(adev))
+			WARN_ONCE(!queue_work(adev->reset_domain.wq,
+					      &adev->virt.flr_work),
+				  "Failed to queue work! at %s",
+				  __func__);
  	}
return 0;




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