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Message-ID: <c9493c5f-ccf8-4e21-b00c-5fbc2a5f2edb@quicinc.com>
Date: Fri, 15 Dec 2023 17:50:52 +0530
From: Bibek Kumar Patro <quic_bibekkum@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: <will@...nel.org>, <robin.murphy@....com>, <joro@...tes.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>, <qipl.kernel.upstream@...cinc.com>
Subject: Re: [PATCH v4 3/5] iommu/arm-smmu: add ACTLR data and support for
SM8550
On 12/15/2023 4:14 PM, Dmitry Baryshkov wrote:
> On Fri, 15 Dec 2023 at 12:19, 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 | 89 ++++++++++++++++++++++
>> 1 file changed, 89 insertions(+)
>>
>> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> index cb49291f5233..d2006f610243 100644
>> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> @@ -20,6 +20,85 @@ struct actlr_config {
>> u32 actlr;
>> };
>>
>> +/*
>> + * SMMU-500 TRM defines BIT(0) as CMTLB (Enable context caching in the
>> + * macro TLB) and BIT(1) as CPRE (Enable context caching in the prefetch
>> + * buffer). The remaining bits are implementation defined and vary across
>> + * SoCs.
>> + */
>> +
>> +#define PREFETCH_DEFAULT 0
>> +#define PREFETCH_SHALLOW BIT(8)
>> +#define PREFETCH_MODERATE BIT(9)
>> +#define PREFETCH_DEEP (BIT(9) | BIT(8))
>
> I thin the following might be more correct:
>
> #include <linux/bitfield.h>
>
> #define PREFETCH_MASK GENMASK(9, 8)
> #define PREFETCH_DEFAULT FIELD_PREP(PREFETCH_MASK, 0)
> #define PREFETCH_SHALLOW FIELD_PREP(PREFETCH_MASK, 1)
> #define PREFETCH_MODERATE FIELD_PREP(PREFETCH_MASK, 2)
> #define PREFETCH_DEEP FIELD_PREP(PREFETCH_MASK, 3)
>
Ack, thanks for this suggestion. Let me try this out using
GENMASK. Once tested, will take care of this in next version.
Thanks,
Bibek
>> +#define PREFETCH_SWITCH_GFX (BIT(5) | BIT(3))
>> +#define CPRE BIT(1)
>> +#define CMTLB BIT(0)
>> +
>> +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 struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu)
>> {
>> return container_of(smmu, struct qcom_smmu, smmu);
>> @@ -549,6 +628,15 @@ 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,
>> + .actlrcfg = sm8550_apps_actlr_cfg,
>> + .actlrcfg_gfx = sm8550_gfx_actlr_cfg,
>> +};
>> +
>> static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
>> .impl = &qcom_smmu_500_impl,
>> .adreno_impl = &qcom_adreno_smmu_500_impl,
>> @@ -583,6 +671,7 @@ 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
>>
>
>
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