linux-kernel - Re: [PATCH v2 09/13] drm/msm/adreno: Add adreno family

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Date:   Fri, 28 Jul 2023 01:15:38 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Clark <robdclark@...omium.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Johan Hovold <johan+linaro@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Elliot Berman <quic_eberman@...cinc.com>,
        Rob Herring <robh@...nel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 09/13] drm/msm/adreno: Add adreno family

On Fri, 28 Jul 2023 at 00:23, Rob Clark <robdclark@...il.com> wrote:
>
> From: Rob Clark <robdclark@...omium.org>
>
> Sometimes it is useful to know the sub-generation (or "family").  And in
> any case, this helps us get away from infering the generation from the

Nit: inferring

> numerical chip-id.
>
> v2: Fix is_a2xx() typo
>
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> ---
>  drivers/gpu/drm/msm/adreno/adreno_device.c | 31 ++++++++++++++-
>  drivers/gpu/drm/msm/adreno/adreno_gpu.c    | 11 +++---
>  drivers/gpu/drm/msm/adreno/adreno_gpu.h    | 46 ++++++++++++++++------
>  3 files changed, 70 insertions(+), 18 deletions(-)

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

>

[skipped]


> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index fe7afac5b059..14af16080bd0 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -29,6 +29,25 @@ enum {
>         ADRENO_FW_MAX,
>  };
>
> +/**
> + * @enum adreno_family: identify generation and possibly sub-generation
> + *
> + * In some cases there are distinct sub-generations within a major revision
> + * so it helps to be able to group the GPU devices by generation and if
> + * necessary sub-generation.
> + */
> +enum adreno_family {
> +       ADRENO_2XX_GEN1,  /* a20x */
> +       ADRENO_2XX_GEN2,  /* a22x */
> +       ADRENO_3XX,
> +       ADRENO_4XX,
> +       ADRENO_5XX,

reserves himself a right to glance at splitting 3xx and 5xx later on.

> +       ADRENO_6XX_GEN1,  /* a630 family */
> +       ADRENO_6XX_GEN2,  /* a640 family */
> +       ADRENO_6XX_GEN3,  /* a650 family */
> +       ADRENO_6XX_GEN4,  /* a660 family */
> +};
> +
>  #define ADRENO_QUIRK_TWO_PASS_USE_WFI          BIT(0)
>  #define ADRENO_QUIRK_FAULT_DETECT_MASK         BIT(1)
>  #define ADRENO_QUIRK_LMLOADKILL_DISABLE                BIT(2)
> @@ -68,6 +87,7 @@ struct adreno_speedbin {
>  struct adreno_info {
>         const char *machine;
>         struct adreno_rev rev;
> +       enum adreno_family family;
>         uint32_t revn;
>         const char *fw[ADRENO_FW_MAX];
>         uint32_t gmem;
> @@ -193,14 +213,14 @@ static inline bool adreno_is_a2xx(const struct adreno_gpu *gpu)
>  {
>         if (WARN_ON_ONCE(!gpu->info))
>                 return false;
> -       return (gpu->info->revn < 300);
> +       return gpu->info->family <= ADRENO_2XX_GEN2;
>  }
>
>  static inline bool adreno_is_a20x(const struct adreno_gpu *gpu)
>  {
>         if (WARN_ON_ONCE(!gpu->info))
>                 return false;
> -       return (gpu->info->revn < 210);
> +       return gpu->info->family == ADRENO_2XX_GEN1;
>  }
>
>  static inline bool adreno_is_a225(const struct adreno_gpu *gpu)
> @@ -343,29 +363,31 @@ static inline int adreno_is_a690(const struct adreno_gpu *gpu)
>  /* check for a615, a616, a618, a619 or any a630 derivatives */
>  static inline int adreno_is_a630_family(const struct adreno_gpu *gpu)
>  {
> -       return adreno_is_revn(gpu, 630) ||
> -               adreno_is_revn(gpu, 615) ||
> -               adreno_is_revn(gpu, 616) ||
> -               adreno_is_revn(gpu, 618) ||
> -               adreno_is_revn(gpu, 619);
> +       if (WARN_ON_ONCE(!gpu->info))
> +               return false;
> +       return gpu->info->family == ADRENO_6XX_GEN1;
>  }
>
>  static inline int adreno_is_a660_family(const struct adreno_gpu *gpu)
>  {
> -       return adreno_is_a660(gpu) || adreno_is_a690(gpu) || adreno_is_7c3(gpu);
> +       if (WARN_ON_ONCE(!gpu->info))
> +               return false;
> +       return gpu->info->family == ADRENO_6XX_GEN4;
>  }
>
>  /* check for a650, a660, or any derivatives */
>  static inline int adreno_is_a650_family(const struct adreno_gpu *gpu)
>  {
> -       return adreno_is_revn(gpu, 650) ||
> -               adreno_is_revn(gpu, 620) ||
> -               adreno_is_a660_family(gpu);
> +       if (WARN_ON_ONCE(!gpu->info))
> +               return false;
> +       return gpu->info->family >= ADRENO_6XX_GEN3;
>  }
>
>  static inline int adreno_is_a640_family(const struct adreno_gpu *gpu)
>  {
> -       return adreno_is_a640(gpu) || adreno_is_a680(gpu);
> +       if (WARN_ON_ONCE(!gpu->info))
> +               return false;
> +       return gpu->info->family == ADRENO_6XX_GEN2;
>  }
>
>  u64 adreno_private_address_space_size(struct msm_gpu *gpu);
> --
> 2.41.0
>


-- 
With best wishes
Dmitry