[Intel-xe] [PATCH V3 1/2] drm/xe: Indroduce low level driver error counting APIs

[Ghimiray, Himal Prasad]

On 25-09-2023 20:13, Tejas Upadhyay wrote:
> Low level driver error that might have power or performance
> impact on the system, we are adding a new error counter to GT
> and tile and increment on each occurrance. Lets introduce APIs
> to define and increment each error type counter.
fix typo in commit message.
> V3:
>    - correct #define max value
> V2:
>    - Move some code to its related patch - Michal
>    - Renaming if API and enum - Michal
>    - GUC errors are moved per GT - Michal
>    - Some nits - Michal
>
> Signed-off-by: Tejas Upadhyay <tejas.upadhyay at intel.com>
> ---
>   drivers/gpu/drm/xe/xe_device.h       |  2 ++
>   drivers/gpu/drm/xe/xe_device_types.h |  9 +++++++++
>   drivers/gpu/drm/xe/xe_gt.c           | 18 ++++++++++++++++++
>   drivers/gpu/drm/xe/xe_gt.h           |  3 +++
>   drivers/gpu/drm/xe/xe_gt_types.h     | 10 ++++++++++
>   drivers/gpu/drm/xe/xe_tile.c         | 18 ++++++++++++++++++
>   6 files changed, 60 insertions(+)
>
> diff --git a/drivers/gpu/drm/xe/xe_device.h b/drivers/gpu/drm/xe/xe_device.h
> index c4232de40ae0..b44c91d1cec9 100644
> --- a/drivers/gpu/drm/xe/xe_device.h
> +++ b/drivers/gpu/drm/xe/xe_device.h
> @@ -159,5 +159,7 @@ static inline bool xe_device_has_flat_ccs(struct xe_device *xe)
>   }
>   
>   u32 xe_device_ccs_bytes(struct xe_device *xe, u64 size);
> +void xe_tile_report_driver_error(struct xe_tile *tile,
> +				 const enum xe_tile_drv_err_type err);
>   
>   #endif
> diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
> index 32ab0fea04ee..a28e140f9e64 100644
> --- a/drivers/gpu/drm/xe/xe_device_types.h
> +++ b/drivers/gpu/drm/xe/xe_device_types.h
> @@ -57,6 +57,12 @@ struct xe_ggtt;
>   		 const struct xe_tile * : (const struct xe_device *)((tile__)->xe),	\
>   		 struct xe_tile * : (tile__)->xe)
>   
> +#define XE_TILE_DRV_ERR_MAX	2
> +enum xe_tile_drv_err_type {
> +	XE_TILE_DRV_ERR_GGTT,
> +	XE_TILE_DRV_ERR_INTR
> +};
> +
>   /**
>    * struct xe_mem_region - memory region structure
>    * This is used to describe a memory region in xe
> @@ -173,6 +179,9 @@ struct xe_tile {
>   
>   	/** @sysfs: sysfs' kobj used by xe_tile_sysfs */
>   	struct kobject *sysfs;
> +
> +	/** @drv_err_cnt: driver error counter for this tile */
> +	u32 drv_err_cnt[XE_TILE_DRV_ERR_MAX];
>   };
>   
>   /**
> diff --git a/drivers/gpu/drm/xe/xe_gt.c b/drivers/gpu/drm/xe/xe_gt.c
> index 1aa44d4f9ac1..a1a0eb59ecc5 100644
> --- a/drivers/gpu/drm/xe/xe_gt.c
> +++ b/drivers/gpu/drm/xe/xe_gt.c
> @@ -47,6 +47,24 @@
>   #include "xe_wa.h"
>   #include "xe_wopcm.h"
>   
> +/**
> + * xe_gt_report_driver_error - Count driver err for gt
> + * @gt: GT to count error for
> + * @err: enum error type
> + *
> + * Increment the driver error counter in respective error
> + * category for this GT.
> + *
> + * Returns void.
> + */
> +void xe_gt_report_driver_error(struct xe_gt *gt,
> +			       const enum xe_gt_drv_err_type err)

Actually the api is not reporting the error. xe_gt_update_error_counter 
will be more logical.

Will leave it up to you to decide.

> +{
> +	xe_gt_assert(gt, err >= ARRAY_SIZE(gt->drv_err_cnt));
> +	WRITE_ONCE(gt->drv_err_cnt[err],
> +		   READ_ONCE(gt->drv_err_cnt[err]) + 1);
> +}
> +
>   struct xe_gt *xe_gt_alloc(struct xe_tile *tile)
>   {
>   	struct xe_gt *gt;
> diff --git a/drivers/gpu/drm/xe/xe_gt.h b/drivers/gpu/drm/xe/xe_gt.h
> index caded203a8a0..9442d615042f 100644
> --- a/drivers/gpu/drm/xe/xe_gt.h
> +++ b/drivers/gpu/drm/xe/xe_gt.h
> @@ -67,4 +67,7 @@ static inline bool xe_gt_is_usm_hwe(struct xe_gt *gt, struct xe_hw_engine *hwe)
>   		hwe->instance == gt->usm.reserved_bcs_instance;
>   }
>   
> +void xe_gt_report_driver_error(struct xe_gt *gt,
> +			       const enum xe_gt_drv_err_type err);
> +
>   #endif
> diff --git a/drivers/gpu/drm/xe/xe_gt_types.h b/drivers/gpu/drm/xe/xe_gt_types.h
> index d4310be3e1e7..4645ea9b7893 100644
> --- a/drivers/gpu/drm/xe/xe_gt_types.h
> +++ b/drivers/gpu/drm/xe/xe_gt_types.h
> @@ -24,6 +24,13 @@ enum xe_gt_type {
>   	XE_GT_TYPE_MEDIA,
>   };
>   
> +#define XE_GT_DRV_ERR_MAX	3
> +enum xe_gt_drv_err_type {
> +	XE_GT_DRV_ERR_GUC_COMM,
> +	XE_GT_DRV_ERR_ENGINE,
> +	XE_GT_DRV_ERR_OTHERS
> +};
> +
>   #define XE_MAX_DSS_FUSE_REGS	3
>   #define XE_MAX_EU_FUSE_REGS	1
>   
> @@ -347,6 +354,9 @@ struct xe_gt {
>   		/** @oob: bitmap with active OOB workaroudns */
>   		unsigned long *oob;
>   	} wa_active;
> +
> +	/** @drv_err_cnt: driver error counter for this GT */
> +	u32 drv_err_cnt[XE_GT_DRV_ERR_MAX];
>   };
>   
>   #endif
> diff --git a/drivers/gpu/drm/xe/xe_tile.c b/drivers/gpu/drm/xe/xe_tile.c
> index 131752a57f65..4090798aff4c 100644
> --- a/drivers/gpu/drm/xe/xe_tile.c
> +++ b/drivers/gpu/drm/xe/xe_tile.c
> @@ -71,6 +71,24 @@
>    *  - MOCS and PAT programming
>    */
>   
> +/**
> + * xe_tile_report_driver_error - Count driver err for tile
> + * @tile: Tile to count error for
> + * @err: enum error type
> + *
> + * Increment the driver error counter in respective error
> + * category for this tile.
> + *
> + * Returns void.
> + */
> +void xe_tile_report_driver_error(struct xe_tile *tile,
> +				 const enum xe_tile_drv_err_type err)
> +{
> +	xe_assert(tile_to_xe(tile), err >= ARRAY_SIZE(tile->drv_err_cnt));
> +	WRITE_ONCE(tile->drv_err_cnt[err],
> +		   READ_ONCE(tile->drv_err_cnt[err]) + 1);
> +}
> +
>   /**
>    * xe_tile_alloc - Perform per-tile memory allocation
>    * @tile: Tile to perform allocations for