linux-kernel - Re: [PATCH v8 4/5] iommu/arm-smmu: add ACTLR data and support for SM8550

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Date: Tue, 4 Jun 2024 10:13:33 -0700
From: Rob Clark <robdclark@...il.com>
To: Bibek Kumar Patro <quic_bibekkum@...cinc.com>
Cc: will@...nel.org, robin.murphy@....com, joro@...tes.org, 
	dmitry.baryshkov@...aro.org, konrad.dybcio@...aro.org, jsnitsel@...hat.com, 
	quic_bjorande@...cinc.com, mani@...nel.org, quic_eberman@...cinc.com, 
	robdclark@...omium.org, u.kleine-koenig@...gutronix.de, robh@...nel.org, 
	vladimir.oltean@....com, quic_pkondeti@...cinc.com, quic_molvera@...cinc.com, 
	linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 4/5] iommu/arm-smmu: add ACTLR data and support for SM8550

On Tue, Jan 16, 2024 at 7:06 AM Bibek Kumar Patro
<quic_bibekkum@...cinc.com> wrote:
>
> Add ACTLR data table for SM8550 along with support for
> same including SM8550 specific implementation operations.
>
> Signed-off-by: Bibek Kumar Patro <quic_bibekkum@...cinc.com>
> ---
>  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 85 ++++++++++++++++++++++
>  1 file changed, 85 insertions(+)
>
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> index e6fad02aae92..26acfbdafd0f 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> @@ -23,6 +23,12 @@
>
>  #define CPRE                   (1 << 1)
>  #define CMTLB                  (1 << 0)
> +#define PREFETCH_SHIFT         8
> +#define PREFETCH_DEFAULT       0
> +#define PREFETCH_SHALLOW       (1 << PREFETCH_SHIFT)
> +#define PREFETCH_MODERATE      (2 << PREFETCH_SHIFT)
> +#define PREFETCH_DEEP          (3 << PREFETCH_SHIFT)
> +#define PREFETCH_SWITCH_GFX    (5 << 3)

so, PREFETCH_SWITCH_GFX seems to actually be two things, b5 is
actually PRR_ENABLE and b3 is ??

Probably you should drop the PRR_ENABLE, and perhaps give b3 a better name

BR,
-R

>
>  struct actlr_config {
>         u16 sid;
> @@ -30,6 +36,75 @@ struct actlr_config {
>         u32 actlr;
>  };
>
> +static const struct actlr_config sm8550_apps_actlr_cfg[] = {
> +       { 0x18a0, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x18e0, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x0800, 0x0020, PREFETCH_DEFAULT | CMTLB },
> +       { 0x1800, 0x00c0, PREFETCH_DEFAULT | CMTLB },
> +       { 0x1820, 0x0000, PREFETCH_DEFAULT | CMTLB },
> +       { 0x1860, 0x0000, PREFETCH_DEFAULT | CMTLB },
> +       { 0x0c01, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c02, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c03, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c04, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c05, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c06, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c07, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c08, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c09, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c0c, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c0d, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c0e, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x0c0f, 0x0020, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1961, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1962, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1963, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1964, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1965, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1966, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1967, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1968, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1969, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x196c, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x196d, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x196e, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x196f, 0x0000, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c1, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c2, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c3, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c4, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c5, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c6, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c7, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c8, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19c9, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19cc, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19cd, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19ce, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x19cf, 0x0010, PREFETCH_DEEP | CPRE | CMTLB },
> +       { 0x1c00, 0x0002, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1c01, 0x0000, PREFETCH_DEFAULT | CMTLB },
> +       { 0x1920, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1923, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1924, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1940, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1941, 0x0004, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1943, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1944, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +       { 0x1947, 0x0000, PREFETCH_SHALLOW | CPRE | CMTLB },
> +};
> +
> +static const struct actlr_config sm8550_gfx_actlr_cfg[] = {
> +       { 0x0000, 0x03ff, PREFETCH_SWITCH_GFX | PREFETCH_DEEP | CPRE | CMTLB },
> +};
> +
> +static const struct actlr_variant sm8550_actlr[] = {
> +       { .io_start = 0x15000000, .actlrcfg = sm8550_apps_actlr_cfg,
> +                       .num_actlrcfg = ARRAY_SIZE(sm8550_apps_actlr_cfg) },
> +       { .io_start = 0x03da0000, .actlrcfg = sm8550_gfx_actlr_cfg,
> +                       .num_actlrcfg = ARRAY_SIZE(sm8550_gfx_actlr_cfg) },
> +};
> +
>  static struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu)
>  {
>         return container_of(smmu, struct qcom_smmu, smmu);
> @@ -601,6 +676,15 @@ static const struct qcom_smmu_match_data sdm845_smmu_500_data = {
>         /* Also no debug configuration. */
>  };
>
> +
> +static const struct qcom_smmu_match_data sm8550_smmu_500_impl0_data = {
> +       .impl = &qcom_smmu_500_impl,
> +       .adreno_impl = &qcom_adreno_smmu_500_impl,
> +       .cfg = &qcom_smmu_impl0_cfg,
> +       .actlrvar = sm8550_actlr,
> +       .num_smmu = ARRAY_SIZE(sm8550_actlr),
> +};
> +
>  static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
>         .impl = &qcom_smmu_500_impl,
>         .adreno_impl = &qcom_adreno_smmu_500_impl,
> @@ -635,6 +719,7 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
>         { .compatible = "qcom,sm8250-smmu-500", .data = &qcom_smmu_500_impl0_data },
>         { .compatible = "qcom,sm8350-smmu-500", .data = &qcom_smmu_500_impl0_data },
>         { .compatible = "qcom,sm8450-smmu-500", .data = &qcom_smmu_500_impl0_data },
> +       { .compatible = "qcom,sm8550-smmu-500", .data = &sm8550_smmu_500_impl0_data },
>         { .compatible = "qcom,smmu-500", .data = &qcom_smmu_500_impl0_data },
>         { }
>  };
> --
> 2.17.1
>
>