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Message-ID: <825a2955-d585-49f8-9f55-7461c5586141@quicinc.com>
Date: Wed, 31 Jan 2024 09:12:25 +0800
From: Tao Zhang <quic_taozha@...cinc.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
Mathieu Poirier
<mathieu.poirier@...aro.org>,
Alexander Shishkin
<alexander.shishkin@...ux.intel.com>,
Konrad Dybcio <konradybcio@...il.com>,
Mike Leach <mike.leach@...aro.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: Jinlong Mao <quic_jinlmao@...cinc.com>, Leo Yan <leo.yan@...aro.org>,
"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
<coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
Tingwei Zhang
<quic_tingweiz@...cinc.com>,
Yuanfang Zhang <quic_yuanfang@...cinc.com>,
Trilok Soni <quic_tsoni@...cinc.com>,
Song Chai <quic_songchai@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
<andersson@...nel.org>
Subject: Re: [PATCH v5 07/10] coresight-tpdm: Add pattern registers support
for CMB
On 1/30/2024 8:40 PM, Suzuki K Poulose wrote:
> On 30/01/2024 09:02, Tao Zhang wrote:
>> Timestamps are requested if the monitor’s CMB data set unit input
>> data matches the value in the Monitor CMB timestamp pattern and mask
>> registers (M_CMB_TPR and M_CMB_TPMR) when CMB timestamp enabled
>> via the timestamp insertion enable register bit(CMB_TIER.PATT_TSENAB).
>> The pattern match trigger output is achieved via setting values into
>> the CMB trigger pattern and mask registers (CMB_XPR and CMB_XPMR).
>> After configuring a pattern through these registers, the TPDM subunit
>> will assert an output trigger every time it receives new input data
>> that matches the configured pattern value. Values in a given bit
>> number of the mask register correspond to the same bit number in
>> the corresponding pattern register.
>>
>> Reviewed-by: James Clark <james.clark@....com>
>> Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
>> Signed-off-by: Jinlong Mao <quic_jinlmao@...cinc.com>
>> ---
>> .../testing/sysfs-bus-coresight-devices-tpdm | 30 ++++++
>> drivers/hwtracing/coresight/coresight-tpdm.c | 96 ++++++++++++++++++-
>> drivers/hwtracing/coresight/coresight-tpdm.h | 39 ++++++++
>> 3 files changed, 164 insertions(+), 1 deletion(-)
>>
>> diff --git
>> a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> index 6dfb18d6d64a..b6cf050861ed 100644
>> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> @@ -184,3 +184,33 @@ Description: (Write) Set the data collection
>> mode of CMB tpdm. Continuous
>> Accepts only one of the 2 values - 0 or 1.
>> 0 : Continuous CMB collection mode.
>> 1 : Trace-on-change CMB collection mode.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@...cinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@...cinc.com>
>> +Description:
>> + (RW) Set/Get the value of the trigger pattern for the CMB
>> + subunit TPDM.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpmr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@...cinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@...cinc.com>
>> +Description:
>> + (RW) Set/Get the mask of the trigger pattern for the CMB
>> + subunit TPDM.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@...cinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@...cinc.com>
>> +Description:
>> + (RW) Set/Get the value of the pattern for the CMB subunit TPDM.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpmr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@...cinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@...cinc.com>
>> +Description:
>> + (RW) Set/Get the mask of the pattern for the CMB subunit TPDM.
>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c
>> b/drivers/hwtracing/coresight/coresight-tpdm.c
>> index b20071460375..07587287d9fa 100644
>> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
>> @@ -66,6 +66,26 @@ static ssize_t tpdm_simple_dataset_show(struct
>> device *dev,
>> return -EINVAL;
>> return sysfs_emit(buf, "0x%x\n",
>> drvdata->dsb->msr[tpdm_attr->idx]);
>> + case CMB_TRIG_PATT:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->trig_patt[tpdm_attr->idx]);
>> + case CMB_TRIG_PATT_MASK:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->trig_patt_mask[tpdm_attr->idx]);
>> + case CMB_PATT:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->patt_val[tpdm_attr->idx]);
>> + case CMB_PATT_MASK:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->patt_mask[tpdm_attr->idx]);
>> }
>> return -EINVAL;
>> }
>> @@ -118,6 +138,30 @@ static ssize_t tpdm_simple_dataset_store(struct
>> device *dev,
>> ret = size;
>> }
>> break;
>> + case CMB_TRIG_PATT:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->trig_patt[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> + case CMB_TRIG_PATT_MASK:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->trig_patt_mask[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> + case CMB_PATT:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->patt_val[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> + case CMB_PATT_MASK:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->patt_mask[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> default:
>> break;
>> }
>> @@ -280,12 +324,32 @@ static void tpdm_enable_dsb(struct tpdm_drvdata
>> *drvdata)
>> static void tpdm_enable_cmb(struct tpdm_drvdata *drvdata)
>> {
>> - u32 val;
>> + u32 val, i;
>> if (!tpdm_has_cmb_dataset(drvdata))
>> return;
>> + /* Configure pattern registers */
>> + for (i = 0; i < TPDM_CMB_MAX_PATT; i++) {
>> + writel_relaxed(drvdata->cmb->patt_val[i],
>> + drvdata->base + TPDM_CMB_TPR(i));
>> + writel_relaxed(drvdata->cmb->patt_mask[i],
>> + drvdata->base + TPDM_CMB_TPMR(i));
>> + writel_relaxed(drvdata->cmb->trig_patt[i],
>> + drvdata->base + TPDM_CMB_XPR(i));
>> + writel_relaxed(drvdata->cmb->trig_patt_mask[i],
>> + drvdata->base + TPDM_CMB_XPMR(i));
>> + }
>> +
>> val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
>> + /*
>> + * Set to 0 for continuous CMB collection mode,
>> + * 1 for trace-on-change CMB collection mode.
>> + */
>> + if (drvdata->cmb->trace_mode)
>> + val |= TPDM_CMB_CR_MODE;
>> + else
>> + val &= ~TPDM_CMB_CR_MODE;
>> /* Set the enable bit of CMB control register to 1 */
>> val |= TPDM_CMB_CR_ENA;
>> writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
>> @@ -887,6 +951,22 @@ static struct attribute *tpdm_dsb_msr_attrs[] = {
>> NULL,
>> };
>> +static struct attribute *tpdm_cmb_trig_patt_attrs[] = {
>> + CMB_TRIG_PATT_ATTR(0),
>> + CMB_TRIG_PATT_ATTR(1),
>> + CMB_TRIG_PATT_MASK_ATTR(0),
>> + CMB_TRIG_PATT_MASK_ATTR(1),
>> + NULL,
>> +};
>> +
>> +static struct attribute *tpdm_cmb_patt_attrs[] = {
>> + CMB_PATT_ATTR(0),
>> + CMB_PATT_ATTR(1),
>> + CMB_PATT_MASK_ATTR(0),
>> + CMB_PATT_MASK_ATTR(1),
>> + NULL,
>> +};
>> +
>> static struct attribute *tpdm_dsb_attrs[] = {
>> &dev_attr_dsb_mode.attr,
>> &dev_attr_dsb_trig_ts.attr,
>> @@ -933,6 +1013,18 @@ static struct attribute_group tpdm_cmb_attr_grp
>> = {
>> .is_visible = tpdm_cmb_is_visible,
>> };
>> +static struct attribute_group tpdm_cmb_trig_patt_grp = {
>> + .attrs = tpdm_cmb_trig_patt_attrs,
>> + .is_visible = tpdm_cmb_is_visible,
>> + .name = "cmb_trig_patt",
>> +};
>> +
>> +static struct attribute_group tpdm_cmb_patt_grp = {
>> + .attrs = tpdm_cmb_patt_attrs,
>> + .is_visible = tpdm_cmb_is_visible,
>> + .name = "cmb_patt",
>> +};
>> +
>> static const struct attribute_group *tpdm_attr_grps[] = {
>> &tpdm_attr_grp,
>> &tpdm_dsb_attr_grp,
>> @@ -941,6 +1033,8 @@ static const struct attribute_group
>> *tpdm_attr_grps[] = {
>> &tpdm_dsb_patt_grp,
>> &tpdm_dsb_msr_grp,
>> &tpdm_cmb_attr_grp,
>> + &tpdm_cmb_trig_patt_grp,
>> + &tpdm_cmb_patt_grp,
>> NULL,
>> };
>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h
>> b/drivers/hwtracing/coresight/coresight-tpdm.h
>> index 2af92c270ed1..8cb8a9b35384 100644
>> --- a/drivers/hwtracing/coresight/coresight-tpdm.h
>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.h
>> @@ -11,12 +11,23 @@
>> /* CMB Subunit Registers */
>> #define TPDM_CMB_CR (0xA00)
>> +/*CMB subunit timestamp pattern registers*/
>> +#define TPDM_CMB_TPR(n) (0xA08 + (n * 4))
>> +/*CMB subunit timestamp pattern mask registers*/
>> +#define TPDM_CMB_TPMR(n) (0xA10 + (n * 4))
>> +/*CMB subunit trigger pattern registers*/
>> +#define TPDM_CMB_XPR(n) (0xA18 + (n * 4))
>> +/*CMB subunit trigger pattern mask registers*/
>
> minor nit: Leave a space after/before '/*' & '*/'
Sure, I will update this to the next patch series.
Best,
Tao
>
> Suzuki
>
>
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