Re: [PATCH 1/1] amdgpu fix for gfx1103 queue evict/restore crash

["Christian König" <christian.koenig@amd.com>]

Am 27.11.24 um 12:46 schrieb Mika Laitio:
> AMD gfx1103 / M780 iGPU will crash eventually when used for
> pytorch ML/AI operations on rocm sdk stack. After kernel error
> the application exits on error and linux desktop can itself
> sometimes either freeze or reset back to login screen.
>
> Error will happen randomly when kernel calls evict_process_queues_cpsch and
> restore_process_queues_cpsch methods to remove and restore the queues
> that has been created earlier.
>
> The fix is to remove the evict and restore calls when device used is
> iGPU. The queues that has been added during the user space application execution
> time will still be removed when the application exits

As far as I can see that is absolutely not a fix but rather a obviously 
broken workaround.

Evicting and restoring queues is usually mandatory for correct operation.

So just ignore that this doesn't work will just is not something you can do.

Regards,
Christian.

>
> On evety test attempts the crash has always happened on the
> same location while removing the 2nd queue of 3 with doorbell id 0x1002.
>
> Below is the trace captured by adding more printouts to problem
> location to print message also when the queue is evicted or resrored
> succesfully.
>
> [  948.324174] amdgpu 0000:c4:00.0: amdgpu: add_queue_mes added hardware queue to MES, doorbell=0x1202, queue: 2, caller: restore_process_queues_cpsch
> [  948.334344] amdgpu 0000:c4:00.0: amdgpu: add_queue_mes added hardware queue to MES, doorbell=0x1002, queue: 1, caller: restore_process_queues_cpsch
> [  948.344499] amdgpu 0000:c4:00.0: amdgpu: add_queue_mes added hardware queue to MES, doorbell=0x1000, queue: 0, caller: restore_process_queues_cpsch
> [  952.380614] amdgpu 0000:c4:00.0: amdgpu: remove_queue_mes removed hardware queue from MES, doorbell=0x1202, queue: 2, caller: evict_process_queues_cpsch
> [  952.391330] amdgpu 0000:c4:00.0: amdgpu: remove_queue_mes removed hardware queue from MES, doorbell=0x1002, queue: 1, caller: evict_process_queues_cpsch
> [  952.401634] amdgpu 0000:c4:00.0: amdgpu: remove_queue_mes removed hardware queue from MES, doorbell=0x1000, queue: 0, caller: evict_process_queues_cpsch
> [  952.414507] amdgpu 0000:c4:00.0: amdgpu: add_queue_mes added hardware queue to MES, doorbell=0x1202, queue: 2, caller: restore_process_queues_cpsch
> [  952.424618] amdgpu 0000:c4:00.0: amdgpu: add_queue_mes added hardware queue to MES, doorbell=0x1002, queue: 1, caller: restore_process_queues_cpsch
> [  952.434922] amdgpu 0000:c4:00.0: amdgpu: add_queue_mes added hardware queue to MES, doorbell=0x1000, queue: 0, caller: restore_process_queues_cpsch
> [  952.446272] amdgpu 0000:c4:00.0: amdgpu: remove_queue_mes removed hardware queue from MES, doorbell=0x1202, queue: 2, caller: evict_process_queues_cpsch
> [  954.460341] amdgpu 0000:c4:00.0: amdgpu: MES failed to respond to msg=REMOVE_QUEUE
> [  954.460356] amdgpu 0000:c4:00.0: amdgpu: remove_queue_mes failed to remove hardware queue from MES, doorbell=0x1002, queue: 1, caller: evict_process_queues_cpsch
> [  954.460360] amdgpu 0000:c4:00.0: amdgpu: MES might be in unrecoverable state, issue a GPU reset
> [  954.460366] amdgpu 0000:c4:00.0: amdgpu: Failed to evict queue 1
> [  954.460368] amdgpu 0000:c4:00.0: amdgpu: Failed to evict process queues
> [  954.460439] amdgpu 0000:c4:00.0: amdgpu: GPU reset begin!
> [  954.460464] amdgpu 0000:c4:00.0: amdgpu: remove_all_queues_mes: Failed to remove queue 0 for dev 5257
> [  954.460515] amdgpu 0000:c4:00.0: amdgpu: Dumping IP State
> [  954.462637] amdgpu 0000:c4:00.0: amdgpu: Dumping IP State Completed
> [  955.865591] amdgpu: process_termination_cpsch started
> [  955.866432] amdgpu: process_termination_cpsch started
> [  955.866445] amdgpu 0000:c4:00.0: amdgpu: Failed to remove queue 0
> [  956.503043] amdgpu 0000:c4:00.0: amdgpu: MES failed to respond to msg=REMOVE_QUEUE
> [  956.503059] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
> [  958.507491] amdgpu 0000:c4:00.0: amdgpu: MES failed to respond to msg=REMOVE_QUEUE
> [  958.507507] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
> [  960.512077] amdgpu 0000:c4:00.0: amdgpu: MES failed to respond to msg=REMOVE_QUEUE
> [  960.512093] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
> [  960.785816] [drm:gfx_v11_0_hw_fini [amdgpu]] *ERROR* failed to halt cp gfx
>
> Signed-off-by: Mika Laitio <lamikr@gmail.com>
> ---
>   .../drm/amd/amdkfd/kfd_device_queue_manager.c | 24 ++++++++++++-------
>   1 file changed, 16 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> index c79fe9069e22..96088d480e09 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> @@ -1187,9 +1187,12 @@ static int evict_process_queues_cpsch(struct device_queue_manager *dqm,
>   	struct kfd_process_device *pdd;
>   	int retval = 0;
>   
> +	// gfx1103 APU can fail to remove queue on evict/restore cycle
> +	if (dqm->dev->adev->flags & AMD_IS_APU)
> +		goto out;
>   	dqm_lock(dqm);
>   	if (qpd->evicted++ > 0) /* already evicted, do nothing */
> -		goto out;
> +		goto out_unlock;
>   
>   	pdd = qpd_to_pdd(qpd);
>   
> @@ -1198,7 +1201,7 @@ static int evict_process_queues_cpsch(struct device_queue_manager *dqm,
>   	 * Skip queue eviction on process eviction.
>   	 */
>   	if (!pdd->drm_priv)
> -		goto out;
> +		goto out_unlock;
>   
>   	pr_debug_ratelimited("Evicting PASID 0x%x queues\n",
>   			    pdd->process->pasid);
> @@ -1219,7 +1222,7 @@ static int evict_process_queues_cpsch(struct device_queue_manager *dqm,
>   			if (retval) {
>   				dev_err(dev, "Failed to evict queue %d\n",
>   					q->properties.queue_id);
> -				goto out;
> +				goto out_unlock;
>   			}
>   		}
>   	}
> @@ -1231,8 +1234,9 @@ static int evict_process_queues_cpsch(struct device_queue_manager *dqm,
>   					      KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0,
>   					      USE_DEFAULT_GRACE_PERIOD);
>   
> -out:
> +out_unlock:
>   	dqm_unlock(dqm);
> +out:
>   	return retval;
>   }
>   
> @@ -1326,14 +1330,17 @@ static int restore_process_queues_cpsch(struct device_queue_manager *dqm,
>   	uint64_t eviction_duration;
>   	int retval = 0;
>   
> +	// gfx1103 APU can fail to remove queue on evict/restore cycle
> +	if (dqm->dev->adev->flags & AMD_IS_APU)
> +		goto out;
>   	pdd = qpd_to_pdd(qpd);
>   
>   	dqm_lock(dqm);
>   	if (WARN_ON_ONCE(!qpd->evicted)) /* already restored, do nothing */
> -		goto out;
> +		goto out_unlock;
>   	if (qpd->evicted > 1) { /* ref count still > 0, decrement & quit */
>   		qpd->evicted--;
> -		goto out;
> +		goto out_unlock;
>   	}
>   
>   	/* The debugger creates processes that temporarily have not acquired
> @@ -1364,7 +1371,7 @@ static int restore_process_queues_cpsch(struct device_queue_manager *dqm,
>   			if (retval) {
>   				dev_err(dev, "Failed to restore queue %d\n",
>   					q->properties.queue_id);
> -				goto out;
> +				goto out_unlock;
>   			}
>   		}
>   	}
> @@ -1375,8 +1382,9 @@ static int restore_process_queues_cpsch(struct device_queue_manager *dqm,
>   	atomic64_add(eviction_duration, &pdd->evict_duration_counter);
>   vm_not_acquired:
>   	qpd->evicted = 0;
> -out:
> +out_unlock:
>   	dqm_unlock(dqm);
> +out:
>   	return retval;
>   }
>