Messages in this thread | | | Date | Fri, 1 Sep 2023 14:17:31 +0100 | From | Jonathan Cameron <> | Subject | Re: [RFC 12/12] arm_mpam: Program Downstream priority value |
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On Tue, 15 Aug 2023 20:57:12 +0530 Amit Singh Tomar <amitsinght@marvell.com> wrote:
> Now that Downstream priorities values can be passed from resource control > schemata file, let's program it into memory mapped Priority Partition > Configuration Register. > > Signed-off-by: Amit Singh Tomar <amitsinght@marvell.com> > --- > TODO: > * Invert Priority value based on DSPRI_0_IS_LOW, suggested > by James.
Ah. In testing I just hit this as well as I was expecting the default to change depending on 0_IS_LOW.
> --- > drivers/platform/mpam/mpam_devices.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c > index 59022e42920c..8af6424bb27b 100644 > --- a/drivers/platform/mpam/mpam_devices.c > +++ b/drivers/platform/mpam/mpam_devices.c > @@ -1153,8 +1153,12 @@ static void mpam_reprogram_ris_partid(struct mpam_msc_ris *ris, u16 partid, > > if (mpam_has_feature(mpam_feat_intpri_part, rprops)) > pri_val |= FIELD_PREP(MPAMCFG_PRI_INTPRI, intpri); > - if (mpam_has_feature(mpam_feat_dspri_part, rprops)) > - pri_val |= FIELD_PREP(MPAMCFG_PRI_DSPRI, dspri); > + if (mpam_has_feature(mpam_feat_dspri_part, rprops)) { > + if (mpam_has_feature(mpam_feat_dspri_part, cfg)) { > + pri_val |= FIELD_PREP(MPAMCFG_PRI_DSPRI, cfg->dspri & dspri);
Note that it's not as simple as inverting the value for DSPRI_0_IS_LOW setting being the opposite as in that case dspri is st to 0 a few lines up... So this always ends up 0.
> + } else > + pri_val |= FIELD_PREP(MPAMCFG_PRI_DSPRI, dspri); > + } > > mpam_write_partsel_reg(msc, PRI, pri_val); > }
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