[RFC PATCH] drm/i915: Add GETPARAM for GuC submission version

[Tvrtko Ursulin]

On 24/01/2024 08:19, Joonas Lahtinen wrote:
> Add reporting of the GuC submissio/VF interface version via GETPARAM
> properties. Mesa intends to use this information to check for old
> firmware versions with known bugs before enabling features like async
> compute.

There was 
https://patchwork.freedesktop.org/patch/560704/?series=124592&rev=1 
which does everything in one go so would be my preference.

During the time of that patch there was discussion whether firmware 
version or submission version was better. I vaguely remember someone 
raised an issue with the latter. Adding John in case he remembers.

> Signed-off-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Kenneth Graunke <kenneth at whitecape.org>
> Cc: Jose Souza <jose.souza at intel.com>
> Cc: Sagar Ghuge <sagar.ghuge at intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Cc: John Harrison <John.C.Harrison at Intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> ---
>   drivers/gpu/drm/i915/i915_getparam.c | 12 ++++++++++++
>   include/uapi/drm/i915_drm.h          | 13 +++++++++++++
>   2 files changed, 25 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_getparam.c b/drivers/gpu/drm/i915/i915_getparam.c
> index 5c3fec63cb4c1..f176372debc54 100644
> --- a/drivers/gpu/drm/i915/i915_getparam.c
> +++ b/drivers/gpu/drm/i915/i915_getparam.c
> @@ -113,6 +113,18 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
>   		if (value < 0)
>   			return value;
>   		break;
> +	case I915_PARAM_GUC_SUBMISSION_VERSION_MAJOR:
> +	case I915_PARAM_GUC_SUBMISSION_VERSION_MINOR:
> +	case I915_PARAM_GUC_SUBMISSION_VERSION_PATCH:
> +		if (!intel_uc_uses_guc_submission(&to_gt(i915)->uc))
> +			return -ENODEV;
> +		if (param->param == I915_PARAM_GUC_SUBMISSION_VERSION_MAJOR)
> +			value = to_gt(i915)->uc.guc.submission_version.major;
> +		else if (param->param == I915_PARAM_GUC_SUBMISSION_VERSION_MINOR)
> +			value = to_gt(i915)->uc.guc.submission_version.minor;
> +		else
> +			value = to_gt(i915)->uc.guc.submission_version.patch;
> +		break;
>   	case I915_PARAM_MMAP_GTT_VERSION:
>   		/* Though we've started our numbering from 1, and so class all
>   		 * earlier versions as 0, in effect their value is undefined as
> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> index fd4f9574d177a..7d5a47f182542 100644
> --- a/include/uapi/drm/i915_drm.h
> +++ b/include/uapi/drm/i915_drm.h
> @@ -806,6 +806,19 @@ typedef struct drm_i915_irq_wait {
>    */
>   #define I915_PARAM_PXP_STATUS		 58
>   
> +/*
> + * Query for the GuC submission/VF interface version number

What is this VF you speak of? :/

Regards,

Tvrtko

> + *
> + * -ENODEV is returned if GuC submission is not used
> + *
> + * On success, returns the respective GuC submission/VF interface major,
> + * minor or patch version as per the requested parameter.
> + *
> + */
> +#define I915_PARAM_GUC_SUBMISSION_VERSION_MAJOR 59
> +#define I915_PARAM_GUC_SUBMISSION_VERSION_MINOR 60
> +#define I915_PARAM_GUC_SUBMISSION_VERSION_PATCH 61
> +
>   /* Must be kept compact -- no holes and well documented */
>   
>   /**