[PATCH v2] drm/amdgpu:no gpu scheduler for KIQ

[PATCH v2] drm/amdgpu:no gpu scheduler for KIQ

[Trigger Huang]

KIQ is used for interaction between driver and
CP, and not exposed to outside client, as such it
doesn't need to be handled by GPU scheduler.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Trigger Huang <trigger.huang@amd.com>

Changes in v2:
 - According to Alex's suggestion, wrapping the scheduler setup
   conditionally instead of returning early.
 - Use another simple method to check if is a KIQ ring.

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 39 +++++++++++++++++--------------
 1 file changed, 21 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index 77b34ec..5772ef2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
@@ -382,24 +382,27 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
 	if (!ring->fence_drv.fences)
 		return -ENOMEM;
 
-	timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
-	if (timeout == 0) {
-		/*
-		 * FIXME:
-		 * Delayed workqueue cannot use it directly,
-		 * so the scheduler will not use delayed workqueue if
-		 * MAX_SCHEDULE_TIMEOUT is set.
-		 * Currently keep it simple and silly.
-		 */
-		timeout = MAX_SCHEDULE_TIMEOUT;
-	}
-	r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
-			   num_hw_submission,
-			   timeout, ring->name);
-	if (r) {
-		DRM_ERROR("Failed to create scheduler on ring %s.\n",
-			  ring->name);
-		return r;
+	/* No need to setup the GPU scheduler for KIQ ring */
+	if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ) {
+		timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
+		if (timeout == 0) {
+			/*
+			 * FIXME:
+			 * Delayed workqueue cannot use it directly,
+			 * so the scheduler will not use delayed workqueue if
+			 * MAX_SCHEDULE_TIMEOUT is set.
+			 * Currently keep it simple and silly.
+			 */
+			timeout = MAX_SCHEDULE_TIMEOUT;
+		}
+		r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
+				   num_hw_submission,
+				   timeout, ring->name);
+		if (r) {
+			DRM_ERROR("Failed to create scheduler on ring %s.\n",
+				  ring->name);
+			return r;
+		}
 	}
 
 	return 0;
-- 
2.7.4

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Re: [PATCH v2] drm/amdgpu:no gpu scheduler for KIQ

[Christian König]

Am 02.11.2016 um 12:48 schrieb Trigger Huang:
> KIQ is used for interaction between driver and
> CP, and not exposed to outside client, as such it
> doesn't need to be handled by GPU scheduler.
>
> Signed-off-by: Monk Liu <Monk.Liu@amd.com>
> Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
> Signed-off-by: Trigger Huang <trigger.huang@amd.com>

Even if you only fix a small mistake it is usually good practice to 
increase the version number of the patch, e.g. you would use v3 in this 
case and write a one liner what was wrong in the commit message.

But that's only a nit pick, so patch is Reviewed-by: Christian König 
<christian.koenig@amd.com> anyway.

Regards,
Christian.

>
> Changes in v2:
>   - According to Alex's suggestion, wrapping the scheduler setup
>     conditionally instead of returning early.
>   - Use another simple method to check if is a KIQ ring.
>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 39 +++++++++++++++++--------------
>   1 file changed, 21 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> index 77b34ec..5772ef2 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> @@ -382,24 +382,27 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
>   	if (!ring->fence_drv.fences)
>   		return -ENOMEM;
>   
> -	timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
> -	if (timeout == 0) {
> -		/*
> -		 * FIXME:
> -		 * Delayed workqueue cannot use it directly,
> -		 * so the scheduler will not use delayed workqueue if
> -		 * MAX_SCHEDULE_TIMEOUT is set.
> -		 * Currently keep it simple and silly.
> -		 */
> -		timeout = MAX_SCHEDULE_TIMEOUT;
> -	}
> -	r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
> -			   num_hw_submission,
> -			   timeout, ring->name);
> -	if (r) {
> -		DRM_ERROR("Failed to create scheduler on ring %s.\n",
> -			  ring->name);
> -		return r;
> +	/* No need to setup the GPU scheduler for KIQ ring */
> +	if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ) {
> +		timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
> +		if (timeout == 0) {
> +			/*
> +			 * FIXME:
> +			 * Delayed workqueue cannot use it directly,
> +			 * so the scheduler will not use delayed workqueue if
> +			 * MAX_SCHEDULE_TIMEOUT is set.
> +			 * Currently keep it simple and silly.
> +			 */
> +			timeout = MAX_SCHEDULE_TIMEOUT;
> +		}
> +		r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
> +				   num_hw_submission,
> +				   timeout, ring->name);
> +		if (r) {
> +			DRM_ERROR("Failed to create scheduler on ring %s.\n",
> +				  ring->name);
> +			return r;
> +		}
>   	}
>   
>   	return 0;


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RE: [PATCH v2] drm/amdgpu:no gpu scheduler for KIQ

[Deucher, Alexander]

> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces@lists.freedesktop.org] On Behalf
> Of Trigger Huang
> Sent: Wednesday, November 02, 2016 7:48 AM
> To: amd-gfx@lists.freedesktop.org
> Cc: Yu, Xiangliang; Liu, Monk; Huang, Trigger
> Subject: [PATCH v2] drm/amdgpu:no gpu scheduler for KIQ
> 
> KIQ is used for interaction between driver and
> CP, and not exposed to outside client, as such it
> doesn't need to be handled by GPU scheduler.
> 
> Signed-off-by: Monk Liu <Monk.Liu@amd.com>
> Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
> Signed-off-by: Trigger Huang <trigger.huang@amd.com>

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

> 
> Changes in v2:
>  - According to Alex's suggestion, wrapping the scheduler setup
>    conditionally instead of returning early.
>  - Use another simple method to check if is a KIQ ring.
> 
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 39
> +++++++++++++++++--------------
>  1 file changed, 21 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> index 77b34ec..5772ef2 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> @@ -382,24 +382,27 @@ int amdgpu_fence_driver_init_ring(struct
> amdgpu_ring *ring,
>  	if (!ring->fence_drv.fences)
>  		return -ENOMEM;
> 
> -	timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
> -	if (timeout == 0) {
> -		/*
> -		 * FIXME:
> -		 * Delayed workqueue cannot use it directly,
> -		 * so the scheduler will not use delayed workqueue if
> -		 * MAX_SCHEDULE_TIMEOUT is set.
> -		 * Currently keep it simple and silly.
> -		 */
> -		timeout = MAX_SCHEDULE_TIMEOUT;
> -	}
> -	r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
> -			   num_hw_submission,
> -			   timeout, ring->name);
> -	if (r) {
> -		DRM_ERROR("Failed to create scheduler on ring %s.\n",
> -			  ring->name);
> -		return r;
> +	/* No need to setup the GPU scheduler for KIQ ring */
> +	if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ) {
> +		timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
> +		if (timeout == 0) {
> +			/*
> +			 * FIXME:
> +			 * Delayed workqueue cannot use it directly,
> +			 * so the scheduler will not use delayed workqueue if
> +			 * MAX_SCHEDULE_TIMEOUT is set.
> +			 * Currently keep it simple and silly.
> +			 */
> +			timeout = MAX_SCHEDULE_TIMEOUT;
> +		}
> +		r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
> +				   num_hw_submission,
> +				   timeout, ring->name);
> +		if (r) {
> +			DRM_ERROR("Failed to create scheduler on ring
> %s.\n",
> +				  ring->name);
> +			return r;
> +		}
>  	}
> 
>  	return 0;
> --
> 2.7.4
> 
> _______________________________________________
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> amd-gfx@lists.freedesktop.org
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RE: [PATCH v2] drm/amdgpu:no gpu scheduler for KIQ

[Huang, Trigger]

Hi Christian,
OK, I got it, thanks for your detailed suggestion.

Thanks & Best Wishes,
Trigger Huang


-----Original Message-----
From: Christian König [mailto:deathsimple@vodafone.de] 
Sent: Wednesday, November 02, 2016 8:24 PM
To: Huang, Trigger <Trigger.Huang@amd.com>; amd-gfx@lists.freedesktop.org
Cc: Yu, Xiangliang <Xiangliang.Yu@amd.com>; Liu, Monk <Monk.Liu@amd.com>
Subject: Re: [PATCH v2] drm/amdgpu:no gpu scheduler for KIQ

Am 02.11.2016 um 12:48 schrieb Trigger Huang:
> KIQ is used for interaction between driver and CP, and not exposed to 
> outside client, as such it doesn't need to be handled by GPU 
> scheduler.
>
> Signed-off-by: Monk Liu <Monk.Liu@amd.com>
> Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
> Signed-off-by: Trigger Huang <trigger.huang@amd.com>

Even if you only fix a small mistake it is usually good practice to increase the version number of the patch, e.g. you would use v3 in this case and write a one liner what was wrong in the commit message.

But that's only a nit pick, so patch is Reviewed-by: Christian König <christian.koenig@amd.com> anyway.

Regards,
Christian.

>
> Changes in v2:
>   - According to Alex's suggestion, wrapping the scheduler setup
>     conditionally instead of returning early.
>   - Use another simple method to check if is a KIQ ring.
>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 39 +++++++++++++++++--------------
>   1 file changed, 21 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c 
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> index 77b34ec..5772ef2 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> @@ -382,24 +382,27 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
>   	if (!ring->fence_drv.fences)
>   		return -ENOMEM;
>   
> -	timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
> -	if (timeout == 0) {
> -		/*
> -		 * FIXME:
> -		 * Delayed workqueue cannot use it directly,
> -		 * so the scheduler will not use delayed workqueue if
> -		 * MAX_SCHEDULE_TIMEOUT is set.
> -		 * Currently keep it simple and silly.
> -		 */
> -		timeout = MAX_SCHEDULE_TIMEOUT;
> -	}
> -	r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
> -			   num_hw_submission,
> -			   timeout, ring->name);
> -	if (r) {
> -		DRM_ERROR("Failed to create scheduler on ring %s.\n",
> -			  ring->name);
> -		return r;
> +	/* No need to setup the GPU scheduler for KIQ ring */
> +	if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ) {
> +		timeout = msecs_to_jiffies(amdgpu_lockup_timeout);
> +		if (timeout == 0) {
> +			/*
> +			 * FIXME:
> +			 * Delayed workqueue cannot use it directly,
> +			 * so the scheduler will not use delayed workqueue if
> +			 * MAX_SCHEDULE_TIMEOUT is set.
> +			 * Currently keep it simple and silly.
> +			 */
> +			timeout = MAX_SCHEDULE_TIMEOUT;
> +		}
> +		r = amd_sched_init(&ring->sched, &amdgpu_sched_ops,
> +				   num_hw_submission,
> +				   timeout, ring->name);
> +		if (r) {
> +			DRM_ERROR("Failed to create scheduler on ring %s.\n",
> +				  ring->name);
> +			return r;
> +		}
>   	}
>   
>   	return 0;


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