Re: [PATCH v3 1/6] drm/i915/guc: distinguish HAS_GUC() from HAS_GUC_UCODE/HAS_GUC_SCHED

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

On 06/05/16 20:31, Dave Gordon wrote:
> For now, anything with a GuC requires uCode loading, and then supports
> command submission once loaded. But these are logically distinct from
> simply "having a GuC", so we need a separate macro for the latter. Then,
> the test in intel_guc_reset() should depend only on whether the GuC
> exists, not whether we're trying to use it for submission.
>
> Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
> ---
>   drivers/gpu/drm/i915/i915_drv.h     | 10 ++++++++--
>   drivers/gpu/drm/i915/intel_uncore.c |  2 +-
>   2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index d5496ab..1142cb3 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2704,8 +2704,14 @@ struct drm_i915_cmd_table {
>
>   #define HAS_CSR(dev)	(IS_GEN9(dev))
>
> -#define HAS_GUC_UCODE(dev)	(IS_GEN9(dev) && !IS_KABYLAKE(dev))
> -#define HAS_GUC_SCHED(dev)	(IS_GEN9(dev) && !IS_KABYLAKE(dev))
> +/*
> + * For now, anything with a GuC requires uCode loading, and then supports
> + * command submission once loaded. But these are logically independent
> + * properties, so we have separate macros to test them.
> + */
> +#define HAS_GUC(dev)		(IS_GEN9(dev) && !IS_KABYLAKE(dev))
> +#define HAS_GUC_UCODE(dev)	(HAS_GUC(dev))
> +#define HAS_GUC_SCHED(dev)	(HAS_GUC(dev))
>
>   #define HAS_RESOURCE_STREAMER(dev) (IS_HASWELL(dev) || \
>   				    INTEL_INFO(dev)->gen >= 8)
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index 4f1dfe6..cdd6397 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -1758,7 +1758,7 @@ int intel_guc_reset(struct drm_i915_private *dev_priv)
>   	int ret;
>   	unsigned long irqflags;
>
> -	if (!i915.enable_guc_submission)
> +	if (!HAS_GUC(dev_priv))
>   		return -EINVAL;
>
>   	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
>

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Regards,

Tvrtko
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