[Freedreno] [PATCH 05/12] drm/msm/adreno: Use quirk to identify cached-coherent support

[Rob Clark]

On Thu, Jul 13, 2023 at 1:06 PM Akhil P Oommen <quic_akhilpo at quicinc.com> wrote:
>
> On Thu, Jul 06, 2023 at 02:10:38PM -0700, Rob Clark wrote:
> >
> > From: Rob Clark <robdclark at chromium.org>
> >
> > It is better to explicitly list it.  With the move to opaque chip-id's
> > for future devices, we should avoid trying to infer things like
> > generation from the numerical value.
> >
> > Signed-off-by: Rob Clark <robdclark at chromium.org>
> > ---
> >  drivers/gpu/drm/msm/adreno/adreno_device.c | 23 +++++++++++++++-------
> >  drivers/gpu/drm/msm/adreno/adreno_gpu.h    |  1 +
> >  2 files changed, 17 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
> > index f469f951a907..3c531da417b9 100644
> > --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> > +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> > @@ -256,6 +256,7 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_512K,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT,
> >               .init = a6xx_gpu_init,
> >       }, {
> >               .rev = ADRENO_REV(6, 1, 9, ANY_ID),
> > @@ -266,6 +267,7 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_512K,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT,
> >               .init = a6xx_gpu_init,
> >               .zapfw = "a615_zap.mdt",
> >               .hwcg = a615_hwcg,
> > @@ -278,6 +280,7 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_1M,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT,
> >               .init = a6xx_gpu_init,
> >               .zapfw = "a630_zap.mdt",
> >               .hwcg = a630_hwcg,
> > @@ -290,6 +293,7 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_1M,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT,
> >               .init = a6xx_gpu_init,
> >               .zapfw = "a640_zap.mdt",
> >               .hwcg = a640_hwcg,
> > @@ -302,7 +306,8 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_1M + SZ_128K,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > -             .quirks = ADRENO_QUIRK_HAS_HW_APRIV,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT |
> > +                     ADRENO_QUIRK_HAS_HW_APRIV,
> >               .init = a6xx_gpu_init,
> >               .zapfw = "a650_zap.mdt",
> >               .hwcg = a650_hwcg,
> > @@ -316,7 +321,8 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_1M + SZ_512K,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > -             .quirks = ADRENO_QUIRK_HAS_HW_APRIV,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT |
> > +                     ADRENO_QUIRK_HAS_HW_APRIV,
> >               .init = a6xx_gpu_init,
> >               .zapfw = "a660_zap.mdt",
> >               .hwcg = a660_hwcg,
> > @@ -329,7 +335,8 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_512K,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > -             .quirks = ADRENO_QUIRK_HAS_HW_APRIV,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT |
> > +                     ADRENO_QUIRK_HAS_HW_APRIV,
> >               .init = a6xx_gpu_init,
> >               .hwcg = a660_hwcg,
> >               .address_space_size = SZ_16G,
> > @@ -342,6 +349,7 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_2M,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT,
> >               .init = a6xx_gpu_init,
> >               .zapfw = "a640_zap.mdt",
> >               .hwcg = a640_hwcg,
> > @@ -353,7 +361,8 @@ static const struct adreno_info gpulist[] = {
> >               },
> >               .gmem = SZ_4M,
> >               .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> > -             .quirks = ADRENO_QUIRK_HAS_HW_APRIV,
> > +             .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT |
> > +                     ADRENO_QUIRK_HAS_HW_APRIV,
> >               .init = a6xx_gpu_init,
> >               .zapfw = "a690_zap.mdt",
> >               .hwcg = a690_hwcg,
> > @@ -565,9 +574,9 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
> >       if (ret)
> >               return ret;
> >
> > -     if (config.rev.core >= 6)
> > -             if (!adreno_has_gmu_wrapper(to_adreno_gpu(gpu)))
> > -                     priv->has_cached_coherent = true;
> > +     priv->has_cached_coherent =
> > +             !!(info->quirks & ADRENO_QUIRK_HAS_CACHED_COHERENT) &&
> > +             !adreno_has_gmu_wrapper(to_adreno_gpu(gpu));
> >
> >       return 0;
> >  }
> > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> > index a7c4a2c536e3..e08d41337169 100644
> > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> > @@ -33,6 +33,7 @@ enum {
> >  #define ADRENO_QUIRK_FAULT_DETECT_MASK               BIT(1)
> >  #define ADRENO_QUIRK_LMLOADKILL_DISABLE              BIT(2)
> >  #define ADRENO_QUIRK_HAS_HW_APRIV            BIT(3)
> > +#define ADRENO_QUIRK_HAS_CACHED_COHERENT     BIT(4)
> a shorter ADRENO_IS_IOCOHERENT?

I prefer "HAS" to "IS".. maybe it is just me but "IS" sounds to me
like all dma is coherent, while in fact gpu mappings can be either
coherent or not.

I suppose it could be "HAS_IOCOHERENT" but we do use "CACHED_COHERENT"
elsewhere.

BR,
-R

>
> -Akhil
>
> >
> >  struct adreno_rev {
> >       uint8_t  core;
> > --
> > 2.41.0
> >