[v7,06/13] coresight-tpdm: Add reset node to TPDM node

  TPDM device need a node to reset the configurations and status of
it. This change provides a node to reset the configurations and
disable the TPDM if it has been enabled.

Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
---
 .../ABI/testing/sysfs-bus-coresight-devices-tpdm   | 10 ++++++++++
 drivers/hwtracing/coresight/coresight-tpdm.c       | 22 ++++++++++++++++++++++
 2 files changed, 32 insertions(+)
  

On 25/07/2023 08:15, Tao Zhang wrote:
> TPDM device need a node to reset the configurations and status of
> it. This change provides a node to reset the configurations and
> disable the TPDM if it has been enabled.
> 
> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
> ---
>   .../ABI/testing/sysfs-bus-coresight-devices-tpdm   | 10 ++++++++++
>   drivers/hwtracing/coresight/coresight-tpdm.c       | 22 ++++++++++++++++++++++
>   2 files changed, 32 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
> index 4a58e64..dbc2fbd0 100644
> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
> @@ -11,3 +11,13 @@ Description:
>   		Accepts only one of the 2 values -  1 or 2.
>   		1 : Generate 64 bits data
>   		2 : Generate 32 bits data
> +
> +What:		/sys/bus/coresight/devices/<tpdm-name>/reset
> +Date:		March 2023
> +KernelVersion	6.5


> +Contact:	Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
> +Description:
> +		(Write) Reset the dataset of the tpdm, and disable the tpdm.

Please fix this, we don't disable TPDM. If it only ever resets the 
datasets, please could we rename this as such ?

  i.e., reset_dataset or reset_dsb_data ?

> +
> +		Accepts only one value -  1.
> +		1 : Reset the dataset of the tpdm
> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
> index 52aa48a6..acc3eea 100644
> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
> @@ -159,6 +159,27 @@ static int tpdm_datasets_setup(struct tpdm_drvdata *drvdata)
>   	return 0;
>   }
>   
> +static ssize_t reset_store(struct device *dev,
> +					  struct device_attribute *attr,
> +					  const char *buf,
> +					  size_t size)

Minor nit: alignment ? Could we have something like :

static ssize_t reset_store(struct device *dev,
			   struct device_attribute *attr,
			   const char *buf,
			   size_t size)


> +{
> +	int ret = 0;
> +	unsigned long val;
> +	struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret || val != 1)
> +		return -EINVAL;
> +
> +	spin_lock(&drvdata->spinlock);
> +	tpdm_reset_datasets(drvdata);
> +	spin_unlock(&drvdata->spinlock);
> +
> +	return size;
> +}
> +static DEVICE_ATTR_WO(reset);
> +
>   /*
>    * value 1: 64 bits test data
>    * value 2: 32 bits test data
> @@ -199,6 +220,7 @@ static ssize_t integration_test_store(struct device *dev,
>   static DEVICE_ATTR_WO(integration_test);
>   
>   static struct attribute *tpdm_attrs[] = {
> +	&dev_attr_reset.attr,
>   	&dev_attr_integration_test.attr,
>   	NULL,
>   };

Suzuki
  

On 8/7/2023 5:36 PM, Suzuki K Poulose wrote:
> On 25/07/2023 08:15, Tao Zhang wrote:
>> TPDM device need a node to reset the configurations and status of
>> it. This change provides a node to reset the configurations and
>> disable the TPDM if it has been enabled.
>>
>> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
>> ---
>>   .../ABI/testing/sysfs-bus-coresight-devices-tpdm   | 10 ++++++++++
>>   drivers/hwtracing/coresight/coresight-tpdm.c       | 22 
>> ++++++++++++++++++++++
>>   2 files changed, 32 insertions(+)
>>
>> diff --git 
>> a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm 
>> b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> index 4a58e64..dbc2fbd0 100644
>> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> @@ -11,3 +11,13 @@ Description:
>>           Accepts only one of the 2 values -  1 or 2.
>>           1 : Generate 64 bits data
>>           2 : Generate 32 bits data
>> +
>> +What:        /sys/bus/coresight/devices/<tpdm-name>/reset
>> +Date:        March 2023
>> +KernelVersion    6.5
>
>
>> +Contact:    Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang 
>> (QUIC) <quic_taozha@quicinc.com>
>> +Description:
>> +        (Write) Reset the dataset of the tpdm, and disable the tpdm.
>
> Please fix this, we don't disable TPDM. If it only ever resets the 
> datasets, please could we rename this as such ?
>
>  i.e., reset_dataset or reset_dsb_data ?
Sure, I will update this in the next patch series.
>
>> +
>> +        Accepts only one value -  1.
>> +        1 : Reset the dataset of the tpdm
>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c 
>> b/drivers/hwtracing/coresight/coresight-tpdm.c
>> index 52aa48a6..acc3eea 100644
>> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
>> @@ -159,6 +159,27 @@ static int tpdm_datasets_setup(struct 
>> tpdm_drvdata *drvdata)
>>       return 0;
>>   }
>>   +static ssize_t reset_store(struct device *dev,
>> +                      struct device_attribute *attr,
>> +                      const char *buf,
>> +                      size_t size)
>
> Minor nit: alignment ? Could we have something like :
>
> static ssize_t reset_store(struct device *dev,
>                struct device_attribute *attr,
>                const char *buf,
>                size_t size)
>
I will update this in the next patch series.


Best,

Tao

>
>> +{
>> +    int ret = 0;
>> +    unsigned long val;
>> +    struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
>> +
>> +    ret = kstrtoul(buf, 10, &val);
>> +    if (ret || val != 1)
>> +        return -EINVAL;
>> +
>> +    spin_lock(&drvdata->spinlock);
>> +    tpdm_reset_datasets(drvdata);
>> +    spin_unlock(&drvdata->spinlock);
>> +
>> +    return size;
>> +}
>> +static DEVICE_ATTR_WO(reset);
>> +
>>   /*
>>    * value 1: 64 bits test data
>>    * value 2: 32 bits test data
>> @@ -199,6 +220,7 @@ static ssize_t integration_test_store(struct 
>> device *dev,
>>   static DEVICE_ATTR_WO(integration_test);
>>     static struct attribute *tpdm_attrs[] = {
>> +    &dev_attr_reset.attr,
>>       &dev_attr_integration_test.attr,
>>       NULL,
>>   };
>
> Suzuki
>
  

On 8/9/2023 2:35 PM, Tao Zhang wrote:
>
> On 8/7/2023 5:36 PM, Suzuki K Poulose wrote:
>> On 25/07/2023 08:15, Tao Zhang wrote:
>>> TPDM device need a node to reset the configurations and status of
>>> it. This change provides a node to reset the configurations and
>>> disable the TPDM if it has been enabled.
>>>
>>> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
>>> ---
>>>   .../ABI/testing/sysfs-bus-coresight-devices-tpdm   | 10 ++++++++++
>>>   drivers/hwtracing/coresight/coresight-tpdm.c       | 22 
>>> ++++++++++++++++++++++
>>>   2 files changed, 32 insertions(+)
>>>
>>> diff --git 
>>> a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm 
>>> b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>>> index 4a58e64..dbc2fbd0 100644
>>> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>>> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>>> @@ -11,3 +11,13 @@ Description:
>>>           Accepts only one of the 2 values -  1 or 2.
>>>           1 : Generate 64 bits data
>>>           2 : Generate 32 bits data
>>> +
>>> +What: /sys/bus/coresight/devices/<tpdm-name>/reset
>>> +Date:        March 2023
>>> +KernelVersion    6.5
>>
>>
>>> +Contact:    Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao 
>>> Zhang (QUIC) <quic_taozha@quicinc.com>
>>> +Description:
>>> +        (Write) Reset the dataset of the tpdm, and disable the tpdm.
>>
>> Please fix this, we don't disable TPDM. If it only ever resets the 
>> datasets, please could we rename this as such ?
>>
>>  i.e., reset_dataset or reset_dsb_data ?
> Sure, I will update this in the next patch series.
>>
>>> +
>>> +        Accepts only one value -  1.
>>> +        1 : Reset the dataset of the tpdm
>>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c 
>>> b/drivers/hwtracing/coresight/coresight-tpdm.c
>>> index 52aa48a6..acc3eea 100644
>>> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
>>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
>>> @@ -159,6 +159,27 @@ static int tpdm_datasets_setup(struct 
>>> tpdm_drvdata *drvdata)
>>>       return 0;
>>>   }
>>>   +static ssize_t reset_store(struct device *dev,
>>> +                      struct device_attribute *attr,
>>> +                      const char *buf,
>>> +                      size_t size)
>>
>> Minor nit: alignment ? Could we have something like :
>>
>> static ssize_t reset_store(struct device *dev,
>>                struct device_attribute *attr,
>>                const char *buf,
>>                size_t size)
>>
> I will update this in the next patch series.
>
>
> Best,
>
> Tao

Hi Suzuki,


With regards to the parameters alignment for the function, could you

kindly remind me the rule of alignment?  I'm using the thunderbird

mail client and I'm not sure if the alignment I see is what you expect.

If the rule can be specified, I can align all the function parameters in

this patch series according to this rule.


Best,

Tao

>
>>
>>> +{
>>> +    int ret = 0;
>>> +    unsigned long val;
>>> +    struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
>>> +
>>> +    ret = kstrtoul(buf, 10, &val);
>>> +    if (ret || val != 1)
>>> +        return -EINVAL;
>>> +
>>> +    spin_lock(&drvdata->spinlock);
>>> +    tpdm_reset_datasets(drvdata);
>>> +    spin_unlock(&drvdata->spinlock);
>>> +
>>> +    return size;
>>> +}
>>> +static DEVICE_ATTR_WO(reset);
>>> +
>>>   /*
>>>    * value 1: 64 bits test data
>>>    * value 2: 32 bits test data
>>> @@ -199,6 +220,7 @@ static ssize_t integration_test_store(struct 
>>> device *dev,
>>>   static DEVICE_ATTR_WO(integration_test);
>>>     static struct attribute *tpdm_attrs[] = {
>>> +    &dev_attr_reset.attr,
>>>       &dev_attr_integration_test.attr,
>>>       NULL,
>>>   };
>>
>> Suzuki
>>
> _______________________________________________
> CoreSight mailing list -- coresight@lists.linaro.org
> To unsubscribe send an email to coresight-leave@lists.linaro.org
  

On 14/08/2023 08:08, Tao Zhang wrote:
> 
> On 8/13/2023 11:38 PM, Tao Zhang wrote:
>>
>> On 8/9/2023 2:35 PM, Tao Zhang wrote:
>>>
>>> On 8/7/2023 5:36 PM, Suzuki K Poulose wrote:
>>>> On 25/07/2023 08:15, Tao Zhang wrote:
>>>>> TPDM device need a node to reset the configurations and status of
>>>>> it. This change provides a node to reset the configurations and
>>>>> disable the TPDM if it has been enabled.
>>>>>
>>>>> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
>>>>> ---
>>>>>   .../ABI/testing/sysfs-bus-coresight-devices-tpdm   | 10 ++++++++++
>>>>>   drivers/hwtracing/coresight/coresight-tpdm.c       | 22 
>>>>> ++++++++++++++++++++++
>>>>>   2 files changed, 32 insertions(+)
>>>>>
>>>>> diff --git 
>>>>> a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm 
>>>>> b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>>>>> index 4a58e64..dbc2fbd0 100644
>>>>> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>>>>> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>>>>> @@ -11,3 +11,13 @@ Description:
>>>>>           Accepts only one of the 2 values -  1 or 2.
>>>>>           1 : Generate 64 bits data
>>>>>           2 : Generate 32 bits data
>>>>> +
>>>>> +What: /sys/bus/coresight/devices/<tpdm-name>/reset
>>>>> +Date:        March 2023
>>>>> +KernelVersion    6.5
>>>>
>>>>
>>>>> +Contact:    Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao 
>>>>> Zhang (QUIC) <quic_taozha@quicinc.com>
>>>>> +Description:
>>>>> +        (Write) Reset the dataset of the tpdm, and disable the tpdm.
>>>>
>>>> Please fix this, we don't disable TPDM. If it only ever resets the 
>>>> datasets, please could we rename this as such ?
>>>>
>>>>  i.e., reset_dataset or reset_dsb_data ?
>>> Sure, I will update this in the next patch series.
>>>>
>>>>> +
>>>>> +        Accepts only one value -  1.
>>>>> +        1 : Reset the dataset of the tpdm
>>>>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c 
>>>>> b/drivers/hwtracing/coresight/coresight-tpdm.c
>>>>> index 52aa48a6..acc3eea 100644
>>>>> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
>>>>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
>>>>> @@ -159,6 +159,27 @@ static int tpdm_datasets_setup(struct 
>>>>> tpdm_drvdata *drvdata)
>>>>>       return 0;
>>>>>   }
>>>>>   +static ssize_t reset_store(struct device *dev,
>>>>> +                      struct device_attribute *attr,
>>>>> +                      const char *buf,
>>>>> +                      size_t size)
>>>>
>>>> Minor nit: alignment ? Could we have something like :
>>>>
>>>> static ssize_t reset_store(struct device *dev,
>>>>                struct device_attribute *attr,
>>>>                const char *buf,
>>>>                size_t size)
>>>>
>>> I will update this in the next patch series.
>>>
>>>
>>> Best,
>>>
>>> Tao
>>
>> Hi Suzuki,
>>
>>
>> With regards to the parameters alignment for the function, could you
>>
>> kindly remind me the rule of alignment?  I'm using the thunderbird
>>
>> mail client and I'm not sure if the alignment I see is what you expect.

It is not about the mail client, I am looking at the code with this 
series applied to the code.

>>
>> If the rule can be specified, I can align all the function parameters in
>>
>> this patch series according to this rule.
>>
>>
>> Best,
>>
>> Tao
> 
> Hi Suzuki,
> 
> 
> Can I follow the following rules to handle the similar case?
> 
> "Descendants are always substantially shorter than the parent and are 
> placed substantially to the right.
> 


> A very commonly used style is to align descendants to a function open 
> parenthesis."

Yes, this is what I expect.

Suzuki


> 
> 
> Best,
> 
> Tao
> 
>>
>>>
>>>>
>>>>> +{
>>>>> +    int ret = 0;
>>>>> +    unsigned long val;
>>>>> +    struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
>>>>> +
>>>>> +    ret = kstrtoul(buf, 10, &val);
>>>>> +    if (ret || val != 1)
>>>>> +        return -EINVAL;
>>>>> +
>>>>> +    spin_lock(&drvdata->spinlock);
>>>>> +    tpdm_reset_datasets(drvdata);
>>>>> +    spin_unlock(&drvdata->spinlock);
>>>>> +
>>>>> +    return size;
>>>>> +}
>>>>> +static DEVICE_ATTR_WO(reset);
>>>>> +
>>>>>   /*
>>>>>    * value 1: 64 bits test data
>>>>>    * value 2: 32 bits test data
>>>>> @@ -199,6 +220,7 @@ static ssize_t integration_test_store(struct 
>>>>> device *dev,
>>>>>   static DEVICE_ATTR_WO(integration_test);
>>>>>     static struct attribute *tpdm_attrs[] = {
>>>>> +    &dev_attr_reset.attr,
>>>>>       &dev_attr_integration_test.attr,
>>>>>       NULL,
>>>>>   };
>>>>
>>>> Suzuki
>>>>
>>> _______________________________________________
>>> CoreSight mailing list -- coresight@lists.linaro.org
>>> To unsubscribe send an email to coresight-leave@lists.linaro.org
>> _______________________________________________
>> CoreSight mailing list -- coresight@lists.linaro.org
>> To unsubscribe send an email to coresight-leave@lists.linaro.org