linux-kernel - Re: [PATCH v4 2/2] drm/xe: Remove devcoredump during driver release

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Date: Tue, 9 Apr 2024 18:21:45 -0400
From: Rodrigo Vivi <rodrigo.vivi@...el.com>
To: José Roberto de Souza <jose.souza@...el.com>
CC: <linux-kernel@...r.kernel.org>, <intel-xe@...ts.freedesktop.org>, Jonathan
 Cavitt <jonathan.cavitt@...el.com>
Subject: Re: [PATCH v4 2/2] drm/xe: Remove devcoredump during driver release

On Tue, Apr 09, 2024 at 01:02:06PM -0700, José Roberto de Souza wrote:
> This will remove devcoredump from file system and free its resources
> during driver unload.
> 
> This fix the driver unload after gpu hang happened, otherwise this
> it would report that Xe KMD is still in use and it would leave the
> kernel in a state that Xe KMD can't be unload without a reboot.
> 
> Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
> Cc: Jonathan Cavitt <jonathan.cavitt@...el.com>
> Acked-by: Jonathan Cavitt <jonathan.cavitt@...el.com>
> Signed-off-by: José Roberto de Souza <jose.souza@...el.com>

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>

> ---
>  drivers/gpu/drm/xe/xe_devcoredump.c | 13 ++++++++++++-
>  drivers/gpu/drm/xe/xe_devcoredump.h |  6 ++++++
>  drivers/gpu/drm/xe/xe_device.c      |  4 ++++
>  3 files changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_devcoredump.c b/drivers/gpu/drm/xe/xe_devcoredump.c
> index 283ca7518aff2..3d7980232be1c 100644
> --- a/drivers/gpu/drm/xe/xe_devcoredump.c
> +++ b/drivers/gpu/drm/xe/xe_devcoredump.c
> @@ -9,6 +9,8 @@
>  #include <linux/devcoredump.h>
>  #include <generated/utsrelease.h>
>  
> +#include <drm/drm_managed.h>
> +
>  #include "xe_device.h"
>  #include "xe_exec_queue.h"
>  #include "xe_force_wake.h"
> @@ -235,5 +237,14 @@ void xe_devcoredump(struct xe_sched_job *job)
>  	dev_coredumpm(xe->drm.dev, THIS_MODULE, coredump, 0, GFP_KERNEL,
>  		      xe_devcoredump_read, xe_devcoredump_free);
>  }
> -#endif
>  
> +static void xe_driver_devcoredump_fini(struct drm_device *drm, void *arg)
> +{
> +	dev_coredump_put(drm->dev);
> +}
> +
> +int xe_devcoredump_init(struct xe_device *xe)
> +{
> +	return drmm_add_action_or_reset(&xe->drm, xe_driver_devcoredump_fini, xe);
> +}
> +#endif
> diff --git a/drivers/gpu/drm/xe/xe_devcoredump.h b/drivers/gpu/drm/xe/xe_devcoredump.h
> index df8671f0b5eb2..e2fa65ce09322 100644
> --- a/drivers/gpu/drm/xe/xe_devcoredump.h
> +++ b/drivers/gpu/drm/xe/xe_devcoredump.h
> @@ -11,10 +11,16 @@ struct xe_sched_job;
>  
>  #ifdef CONFIG_DEV_COREDUMP
>  void xe_devcoredump(struct xe_sched_job *job);
> +int xe_devcoredump_init(struct xe_device *xe);
>  #else
>  static inline void xe_devcoredump(struct xe_sched_job *job)
>  {
>  }
> +
> +static inline int xe_devcoredump_init(struct xe_device *xe)
> +{
> +	return 0;
> +}
>  #endif
>  
>  #endif
> diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
> index 9083f5e02dd9e..ce27d0d1bdb34 100644
> --- a/drivers/gpu/drm/xe/xe_device.c
> +++ b/drivers/gpu/drm/xe/xe_device.c
> @@ -20,6 +20,7 @@
>  #include "regs/xe_regs.h"
>  #include "xe_bo.h"
>  #include "xe_debugfs.h"
> +#include "xe_devcoredump.h"
>  #include "xe_dma_buf.h"
>  #include "xe_drm_client.h"
>  #include "xe_drv.h"
> @@ -513,6 +514,9 @@ int xe_device_probe(struct xe_device *xe)
>  			return err;
>  	}
>  
> +	err = xe_devcoredump_init(xe);
> +	if (err)
> +		return err;
>  	err = drmm_add_action_or_reset(&xe->drm, xe_driver_flr_fini, xe);
>  	if (err)
>  		return err;
> -- 
> 2.44.0
>