[PATCH v3 7/7] drm/xe/uapi: Add a query flag for has_device_atomics_on_smem

[Zeng, Oak]

Reviewed-by: Oak Zeng <oak.zeng at intel.com>

> -----Original Message-----
> From: Intel-xe <intel-xe-bounces at lists.freedesktop.org> On Behalf Of
> Nirmoy Das
> Sent: Monday, April 15, 2024 10:52 AM
> To: intel-xe at lists.freedesktop.org
> Cc: Das, Nirmoy <nirmoy.das at intel.com>
> Subject: [PATCH v3 7/7] drm/xe/uapi: Add a query flag for
> has_device_atomics_on_smem
> 
> Add a query flag for xe->info.has_device_atomics_on_smem
> as this is platform dependent. This flag can be use to inform
> whether DRM_XE_VM_BIND_FLAG_DEVICE_ATOMICS can be effectively
> applied for a given platform.
> 
> Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
> ---
>  drivers/gpu/drm/xe/xe_query.c | 3 +++
>  include/uapi/drm/xe_drm.h     | 5 ++++-
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_query.c
> b/drivers/gpu/drm/xe/xe_query.c
> index df407d73e5f5..43272fdd5442 100644
> --- a/drivers/gpu/drm/xe/xe_query.c
> +++ b/drivers/gpu/drm/xe/xe_query.c
> @@ -336,6 +336,9 @@ static int query_config(struct xe_device *xe, struct
> drm_xe_device_query *query)
>  	if (xe_device_get_root_tile(xe)->mem.vram.usable_size)
>  		config->info[DRM_XE_QUERY_CONFIG_FLAGS] =
>  			DRM_XE_QUERY_CONFIG_FLAG_HAS_VRAM;
> +	if (xe->info.has_device_atomics_on_smem)
> +		config->info[DRM_XE_QUERY_CONFIG_FLAGS] |=
> +
> 	DRM_XE_QUERY_CONFIG_FLAG_HAS_DEV_ATOMIC_ON_SMEM;
>  	config->info[DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT] =
>  		xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K ? SZ_64K :
> SZ_4K;
>  	config->info[DRM_XE_QUERY_CONFIG_VA_BITS] = xe->info.va_bits;
> diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h
> index ca4447e10ac9..80fff6fe3199 100644
> --- a/include/uapi/drm/xe_drm.h
> +++ b/include/uapi/drm/xe_drm.h
> @@ -389,6 +389,8 @@ struct drm_xe_query_mem_regions {
>   *
>   *    - %DRM_XE_QUERY_CONFIG_FLAG_HAS_VRAM - Flag is set if the
> device
>   *      has usable VRAM
> + *    - %DRM_XE_QUERY_CONFIG_FLAG_HAS_DEV_ATOMIC_ON_SMEM -
> Flag is set if the device
> + *      supports device atomics on system memory
>   *  - %DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT - Minimal memory
> alignment
>   *    required by this device, typically SZ_4K or SZ_64K
>   *  - %DRM_XE_QUERY_CONFIG_VA_BITS - Maximum bits of a virtual
> address
> @@ -404,7 +406,8 @@ struct drm_xe_query_config {
> 
>  #define DRM_XE_QUERY_CONFIG_REV_AND_DEVICE_ID	0
>  #define DRM_XE_QUERY_CONFIG_FLAGS			1
> -	#define DRM_XE_QUERY_CONFIG_FLAG_HAS_VRAM	(1 << 0)
> +	#define DRM_XE_QUERY_CONFIG_FLAG_HAS_VRAM		(1 <<
> 0)
> +	#define
> DRM_XE_QUERY_CONFIG_FLAG_HAS_DEV_ATOMIC_ON_SMEM	(1 <<
> 1)
>  #define DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT		2
>  #define DRM_XE_QUERY_CONFIG_VA_BITS			3
>  #define DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY	4
> --
> 2.42.0