Re: [PATCH 4/6] drm/i915: Move sseu helper functions to intel_sseu.h

Daniele Ceraolo Spurio
2019-05-01T18:48:35Z

On 5/1/19 8:34 AM, Stuart Summers wrote:
> v2: fix spacing from checkpatch warning
>
> Signed-off-by: Stuart Summers <stuart.summers@intel.com>
> ---
> drivers/gpu/drm/i915/gt/intel_sseu.h | 47 ++++++++++++++++++++++++
> drivers/gpu/drm/i915/intel_device_info.h | 47 ------------------------
> 2 files changed, 47 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h b/drivers/gpu/drm/i915/gt/intel_sseu.h
> index f5ff6b7a756a..029e71d8f140 100644
> --- a/drivers/gpu/drm/i915/gt/intel_sseu.h
> +++ b/drivers/gpu/drm/i915/gt/intel_sseu.h
> @@ -63,12 +63,59 @@ intel_sseu_from_device_info(const struct sseu_dev_info *sseu)
> return value;
> }
>
> +static inline unsigned int sseu_subslice_total(const struct sseu_dev_info *sseu)
> +{
> + unsigned int i, total = 0;
> +
> + for (i = 0; i < ARRAY_SIZE(sseu->subslice_mask); i++)
> + total += hweight8(sseu->subslice_mask[i]);
> +
> + return total;
> +}
> +
> static inline unsigned int
> sseu_subslices_per_slice(const struct sseu_dev_info *sseu, u8 slice)
> {
> return hweight8(sseu->subslice_mask[slice]);
> }
>
> +static inline int sseu_eu_idx(const struct sseu_dev_info *sseu,
> + int slice, int subslice)
> +{
> + int subslice_stride = DIV_ROUND_UP(sseu->max_eus_per_subslice,
> + BITS_PER_BYTE);
> + int slice_stride = sseu->max_subslices * subslice_stride;
> +
> + return slice * slice_stride + subslice * subslice_stride;
> +}
> +
> +static inline u16 sseu_get_eus(const struct sseu_dev_info *sseu,
> + int slice, int subslice)
> +{
> + int i, offset = sseu_eu_idx(sseu, slice, subslice);
> + u16 eu_mask = 0;
> +
> + for (i = 0;
> + i < DIV_ROUND_UP(sseu->max_eus_per_subslice, BITS_PER_BYTE); i++) {
> + eu_mask |= ((u16)sseu->eu_mask[offset + i]) <<
> + (i * BITS_PER_BYTE);
> + }
> +
> + return eu_mask;
> +}
> +
> +static inline void sseu_set_eus(struct sseu_dev_info *sseu,
> + int slice, int subslice, u16 eu_mask)
> +{
> + int i, offset = sseu_eu_idx(sseu, slice, subslice);
> +
> + for (i = 0;
> + i < DIV_ROUND_UP(sseu->max_eus_per_subslice, BITS_PER_BYTE); i++) {
> + sseu->eu_mask[offset + i] =
> + (eu_mask >> (BITS_PER_BYTE * i)) & 0xff;
> + }
> +}
> +

AFAICS sseu_get_eus() and sseu_set_eus() are only used by sseu-related
functions in device_info.c and sseu_eu_idx() is only used by those 2, so
we can make all 3 of them static in that file. We should also migrate
all of the sseu code from device_info.c to intel_sseu.c for consistency;
I'm ok with that being done as a follow up if you prefer to avoid it in
this series.

I was also about to mention adding the intel_* prefix to the remaining
functions but then I realized you add it in the next patch. My personal
preference would be to do that in this patch, but I'm not going to block
on it.

Daniele

> u32 intel_sseu_make_rpcs(struct drm_i915_private *i915,
> const struct intel_sseu *req_sseu);
>
> diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
> index 5a2e17d6146b..6412a9c72898 100644
> --- a/drivers/gpu/drm/i915/intel_device_info.h
> +++ b/drivers/gpu/drm/i915/intel_device_info.h
> @@ -218,53 +218,6 @@ struct intel_driver_caps {
> bool has_logical_contexts:1;
> };
>
> -static inline unsigned int sseu_subslice_total(const struct sseu_dev_info *sseu)
> -{
> - unsigned int i, total = 0;
> -
> - for (i = 0; i < ARRAY_SIZE(sseu->subslice_mask); i++)
> - total += hweight8(sseu->subslice_mask[i]);
> -
> - return total;
> -}
> -
> -static inline int sseu_eu_idx(const struct sseu_dev_info *sseu,
> - int slice, int subslice)
> -{
> - int subslice_stride = DIV_ROUND_UP(sseu->max_eus_per_subslice,
> - BITS_PER_BYTE);
> - int slice_stride = sseu->max_subslices * subslice_stride;
> -
> - return slice * slice_stride + subslice * subslice_stride;
> -}
> -
> -static inline u16 sseu_get_eus(const struct sseu_dev_info *sseu,
> - int slice, int subslice)
> -{
> - int i, offset = sseu_eu_idx(sseu, slice, subslice);
> - u16 eu_mask = 0;
> -
> - for (i = 0;
> - i < DIV_ROUND_UP(sseu->max_eus_per_subslice, BITS_PER_BYTE); i++) {
> - eu_mask |= ((u16) sseu->eu_mask[offset + i]) <<
> - (i * BITS_PER_BYTE);
> - }
> -
> - return eu_mask;
> -}
> -
> -static inline void sseu_set_eus(struct sseu_dev_info *sseu,
> - int slice, int subslice, u16 eu_mask)
> -{
> - int i, offset = sseu_eu_idx(sseu, slice, subslice);
> -
> - for (i = 0;
> - i < DIV_ROUND_UP(sseu->max_eus_per_subslice, BITS_PER_BYTE); i++) {
> - sseu->eu_mask[offset + i] =
> - (eu_mask >> (BITS_PER_BYTE * i)) & 0xff;
> - }
> -}
> -
> const char *intel_platform_name(enum intel_platform platform);
>
> void intel_device_info_subplatform_init(struct drm_i915_private *dev_priv);