Add a new function to identifiy whether the byte-cntr function is
enabled or not in helper_ops.
The byte-cntr's read_ops is expected if the byte-cntr is enabled when
the user try to read trace data via sysfs node.
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
---
.../hwtracing/coresight/coresight-ctcu-core.c | 35 +++++++++++++++++++
include/linux/coresight.h | 3 ++
2 files changed, 38 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-ctcu-core.c b/drivers/hwtracing/coresight/coresight-ctcu-core.c
index 8fc08e42187e..dec911980939 100644
--- a/drivers/hwtracing/coresight/coresight-ctcu-core.c
+++ b/drivers/hwtracing/coresight/coresight-ctcu-core.c
@@ -234,9 +234,44 @@ static int ctcu_disable(struct coresight_device *csdev, void *data)
return ctcu_set_etr_traceid(csdev, path, false);
}
+static bool ctcu_qcom_byte_cntr_in_use(struct coresight_device *csdev,
+ void **data)
+{
+ struct ctcu_byte_cntr *byte_cntr_data;
+ struct coresight_device *helper;
+ struct ctcu_drvdata *drvdata;
+ int port;
+
+ if (!csdev)
+ return false;
+
+ helper = coresight_get_helper(csdev, CORESIGHT_DEV_SUBTYPE_HELPER_CTCU);
+ if (!helper)
+ return false;
+
+ port = coresight_get_in_port_dest(csdev, helper);
+ if (port < 0)
+ return false;
+
+ drvdata = dev_get_drvdata(helper->dev.parent);
+ /* Something wrong when initialize byte_cntr_read_ops */
+ if (!drvdata->byte_cntr_read_ops)
+ return false;
+
+ byte_cntr_data = &drvdata->byte_cntr_data[port];
+ /* Return the pointer of the ctcu_drvdata if byte-cntr has enabled */
+ if (byte_cntr_data && byte_cntr_data->thresh_val) {
+ *data = (void *)drvdata->byte_cntr_read_ops;
+ return true;
+ }
+
+ return false;
+}
+
static const struct coresight_ops_helper ctcu_helper_ops = {
.enable = ctcu_enable,
.disable = ctcu_disable,
+ .qcom_byte_cntr_in_use = ctcu_qcom_byte_cntr_in_use,
};
static const struct coresight_ops ctcu_ops = {
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 4ac65c68bbf4..b5f052854b08 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -419,11 +419,14 @@ struct coresight_ops_source {
*
* @enable : Enable the device
* @disable : Disable the device
+ * @qcom_byte_cntr_in_use: check whether the byte-cntr is enabled.
*/
struct coresight_ops_helper {
int (*enable)(struct coresight_device *csdev, enum cs_mode mode,
void *data);
int (*disable)(struct coresight_device *csdev, void *data);
+ bool (*qcom_byte_cntr_in_use)(struct coresight_device *csdev,
+ void **data);
};
--
2.34.1Hi,
On Fri, 25 Jul 2025 at 11:08, Jie Gan <jie.gan@oss.qualcomm.com> wrote:
>
> Add a new function to identifiy whether the byte-cntr function is
> enabled or not in helper_ops.
>
> The byte-cntr's read_ops is expected if the byte-cntr is enabled when
> the user try to read trace data via sysfs node.
>
> Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
> ---
> .../hwtracing/coresight/coresight-ctcu-core.c | 35 +++++++++++++++++++
> include/linux/coresight.h | 3 ++
> 2 files changed, 38 insertions(+)
>
> diff --git a/drivers/hwtracing/coresight/coresight-ctcu-core.c b/drivers/hwtracing/coresight/coresight-ctcu-core.c
> index 8fc08e42187e..dec911980939 100644
> --- a/drivers/hwtracing/coresight/coresight-ctcu-core.c
> +++ b/drivers/hwtracing/coresight/coresight-ctcu-core.c
> @@ -234,9 +234,44 @@ static int ctcu_disable(struct coresight_device *csdev, void *data)
> return ctcu_set_etr_traceid(csdev, path, false);
> }
>
> +static bool ctcu_qcom_byte_cntr_in_use(struct coresight_device *csdev,
> + void **data)
> +{
> + struct ctcu_byte_cntr *byte_cntr_data;
> + struct coresight_device *helper;
> + struct ctcu_drvdata *drvdata;
> + int port;
> +
> + if (!csdev)
> + return false;
> +
> + helper = coresight_get_helper(csdev, CORESIGHT_DEV_SUBTYPE_HELPER_CTCU);
> + if (!helper)
> + return false;
> +
> + port = coresight_get_in_port_dest(csdev, helper);
> + if (port < 0)
> + return false;
> +
> + drvdata = dev_get_drvdata(helper->dev.parent);
> + /* Something wrong when initialize byte_cntr_read_ops */
> + if (!drvdata->byte_cntr_read_ops)
> + return false;
> +
> + byte_cntr_data = &drvdata->byte_cntr_data[port];
> + /* Return the pointer of the ctcu_drvdata if byte-cntr has enabled */
> + if (byte_cntr_data && byte_cntr_data->thresh_val) {
> + *data = (void *)drvdata->byte_cntr_read_ops;
> + return true;
> + }
> +
> + return false;
> +}
> +
> static const struct coresight_ops_helper ctcu_helper_ops = {
> .enable = ctcu_enable,
> .disable = ctcu_disable,
> + .qcom_byte_cntr_in_use = ctcu_qcom_byte_cntr_in_use,
> };
>
> static const struct coresight_ops ctcu_ops = {
> diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> index 4ac65c68bbf4..b5f052854b08 100644
> --- a/include/linux/coresight.h
> +++ b/include/linux/coresight.h
> @@ -419,11 +419,14 @@ struct coresight_ops_source {
> *
> * @enable : Enable the device
> * @disable : Disable the device
> + * @qcom_byte_cntr_in_use: check whether the byte-cntr is enabled.
> */
> struct coresight_ops_helper {
> int (*enable)(struct coresight_device *csdev, enum cs_mode mode,
> void *data);
> int (*disable)(struct coresight_device *csdev, void *data);
> + bool (*qcom_byte_cntr_in_use)(struct coresight_device *csdev,
> + void **data);
> };
>
>
> --
> 2.34.1
>
--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK
Hi,
On Fri, 25 Jul 2025 at 11:08, Jie Gan <jie.gan@oss.qualcomm.com> wrote:
>
> Add a new function to identifiy whether the byte-cntr function is
> enabled or not in helper_ops.
>
> The byte-cntr's read_ops is expected if the byte-cntr is enabled when
> the user try to read trace data via sysfs node.
>
> Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
> ---
> .../hwtracing/coresight/coresight-ctcu-core.c | 35 +++++++++++++++++++
> include/linux/coresight.h | 3 ++
> 2 files changed, 38 insertions(+)
>
> diff --git a/drivers/hwtracing/coresight/coresight-ctcu-core.c b/drivers/hwtracing/coresight/coresight-ctcu-core.c
> index 8fc08e42187e..dec911980939 100644
> --- a/drivers/hwtracing/coresight/coresight-ctcu-core.c
> +++ b/drivers/hwtracing/coresight/coresight-ctcu-core.c
> @@ -234,9 +234,44 @@ static int ctcu_disable(struct coresight_device *csdev, void *data)
> return ctcu_set_etr_traceid(csdev, path, false);
> }
>
> +static bool ctcu_qcom_byte_cntr_in_use(struct coresight_device *csdev,
> + void **data)
> +{
> + struct ctcu_byte_cntr *byte_cntr_data;
> + struct coresight_device *helper;
> + struct ctcu_drvdata *drvdata;
> + int port;
> +
> + if (!csdev)
> + return false;
> +
> + helper = coresight_get_helper(csdev, CORESIGHT_DEV_SUBTYPE_HELPER_CTCU);
> + if (!helper)
> + return false;
> +
> + port = coresight_get_in_port_dest(csdev, helper);
> + if (port < 0)
> + return false;
> +
> + drvdata = dev_get_drvdata(helper->dev.parent);
> + /* Something wrong when initialize byte_cntr_read_ops */
> + if (!drvdata->byte_cntr_read_ops)
> + return false;
> +
> + byte_cntr_data = &drvdata->byte_cntr_data[port];
> + /* Return the pointer of the ctcu_drvdata if byte-cntr has enabled */
> + if (byte_cntr_data && byte_cntr_data->thresh_val) {
> + *data = (void *)drvdata->byte_cntr_read_ops;
> + return true;
> + }
> +
> + return false;
> +}
> +
> static const struct coresight_ops_helper ctcu_helper_ops = {
> .enable = ctcu_enable,
> .disable = ctcu_disable,
> + .qcom_byte_cntr_in_use = ctcu_qcom_byte_cntr_in_use,
These ops structures are for generic functions used throughout the
devices. Do not put this function here.
This is a specific ctcu helper. Make it external to the file and
declare it in coresight-ctcu.h
Mike
> };
>
> static const struct coresight_ops ctcu_ops = {
> diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> index 4ac65c68bbf4..b5f052854b08 100644
> --- a/include/linux/coresight.h
> +++ b/include/linux/coresight.h
> @@ -419,11 +419,14 @@ struct coresight_ops_source {
> *
> * @enable : Enable the device
> * @disable : Disable the device
> + * @qcom_byte_cntr_in_use: check whether the byte-cntr is enabled.
> */
> struct coresight_ops_helper {
> int (*enable)(struct coresight_device *csdev, enum cs_mode mode,
> void *data);
> int (*disable)(struct coresight_device *csdev, void *data);
> + bool (*qcom_byte_cntr_in_use)(struct coresight_device *csdev,
> + void **data);
> };
>
>
> --
> 2.34.1
>
--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK
On 8/5/2025 8:30 PM, Mike Leach wrote:
> Hi,
>
> On Fri, 25 Jul 2025 at 11:08, Jie Gan <jie.gan@oss.qualcomm.com> wrote:
>>
>> Add a new function to identifiy whether the byte-cntr function is
>> enabled or not in helper_ops.
>>
>> The byte-cntr's read_ops is expected if the byte-cntr is enabled when
>> the user try to read trace data via sysfs node.
>>
>> Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
>> ---
>> .../hwtracing/coresight/coresight-ctcu-core.c | 35 +++++++++++++++++++
>> include/linux/coresight.h | 3 ++
>> 2 files changed, 38 insertions(+)
>>
>> diff --git a/drivers/hwtracing/coresight/coresight-ctcu-core.c b/drivers/hwtracing/coresight/coresight-ctcu-core.c
>> index 8fc08e42187e..dec911980939 100644
>> --- a/drivers/hwtracing/coresight/coresight-ctcu-core.c
>> +++ b/drivers/hwtracing/coresight/coresight-ctcu-core.c
>> @@ -234,9 +234,44 @@ static int ctcu_disable(struct coresight_device *csdev, void *data)
>> return ctcu_set_etr_traceid(csdev, path, false);
>> }
>>
>> +static bool ctcu_qcom_byte_cntr_in_use(struct coresight_device *csdev,
>> + void **data)
>> +{
>> + struct ctcu_byte_cntr *byte_cntr_data;
>> + struct coresight_device *helper;
>> + struct ctcu_drvdata *drvdata;
>> + int port;
>> +
>> + if (!csdev)
>> + return false;
>> +
>> + helper = coresight_get_helper(csdev, CORESIGHT_DEV_SUBTYPE_HELPER_CTCU);
>> + if (!helper)
>> + return false;
>> +
>> + port = coresight_get_in_port_dest(csdev, helper);
>> + if (port < 0)
>> + return false;
>> +
>> + drvdata = dev_get_drvdata(helper->dev.parent);
>> + /* Something wrong when initialize byte_cntr_read_ops */
>> + if (!drvdata->byte_cntr_read_ops)
>> + return false;
>> +
>> + byte_cntr_data = &drvdata->byte_cntr_data[port];
>> + /* Return the pointer of the ctcu_drvdata if byte-cntr has enabled */
>> + if (byte_cntr_data && byte_cntr_data->thresh_val) {
>> + *data = (void *)drvdata->byte_cntr_read_ops;
>> + return true;
>> + }
>> +
>> + return false;
>> +}
>> +
>> static const struct coresight_ops_helper ctcu_helper_ops = {
>> .enable = ctcu_enable,
>> .disable = ctcu_disable,
>> + .qcom_byte_cntr_in_use = ctcu_qcom_byte_cntr_in_use,
>
> These ops structures are for generic functions used throughout the
> devices. Do not put this function here.
>
> This is a specific ctcu helper. Make it external to the file and
> declare it in coresight-ctcu.h
Will address the comment in next version.
Thanks,
Jie
>
> Mike
>
>> };
>>
>> static const struct coresight_ops ctcu_ops = {
>> diff --git a/include/linux/coresight.h b/include/linux/coresight.h
>> index 4ac65c68bbf4..b5f052854b08 100644
>> --- a/include/linux/coresight.h
>> +++ b/include/linux/coresight.h
>> @@ -419,11 +419,14 @@ struct coresight_ops_source {
>> *
>> * @enable : Enable the device
>> * @disable : Disable the device
>> + * @qcom_byte_cntr_in_use: check whether the byte-cntr is enabled.
>> */
>> struct coresight_ops_helper {
>> int (*enable)(struct coresight_device *csdev, enum cs_mode mode,
>> void *data);
>> int (*disable)(struct coresight_device *csdev, void *data);
>> + bool (*qcom_byte_cntr_in_use)(struct coresight_device *csdev,
>> + void **data);
>> };
>>
>>
>> --
>> 2.34.1
>>
>
>
On 8/6/2025 8:35 AM, Jie Gan wrote:
>
>
> On 8/5/2025 8:30 PM, Mike Leach wrote:
>> Hi,
>>
>> On Fri, 25 Jul 2025 at 11:08, Jie Gan <jie.gan@oss.qualcomm.com> wrote:
>>>
>>> Add a new function to identifiy whether the byte-cntr function is
>>> enabled or not in helper_ops.
>>>
>>> The byte-cntr's read_ops is expected if the byte-cntr is enabled when
>>> the user try to read trace data via sysfs node.
>>>
>>> Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
>>> ---
>>> .../hwtracing/coresight/coresight-ctcu-core.c | 35 +++++++++++++++++++
>>> include/linux/coresight.h | 3 ++
>>> 2 files changed, 38 insertions(+)
>>>
>>> diff --git a/drivers/hwtracing/coresight/coresight-ctcu-core.c b/
>>> drivers/hwtracing/coresight/coresight-ctcu-core.c
>>> index 8fc08e42187e..dec911980939 100644
>>> --- a/drivers/hwtracing/coresight/coresight-ctcu-core.c
>>> +++ b/drivers/hwtracing/coresight/coresight-ctcu-core.c
>>> @@ -234,9 +234,44 @@ static int ctcu_disable(struct coresight_device
>>> *csdev, void *data)
>>> return ctcu_set_etr_traceid(csdev, path, false);
>>> }
>>>
>>> +static bool ctcu_qcom_byte_cntr_in_use(struct coresight_device *csdev,
>>> + void **data)
>>> +{
>>> + struct ctcu_byte_cntr *byte_cntr_data;
>>> + struct coresight_device *helper;
>>> + struct ctcu_drvdata *drvdata;
>>> + int port;
>>> +
>>> + if (!csdev)
>>> + return false;
>>> +
>>> + helper = coresight_get_helper(csdev,
>>> CORESIGHT_DEV_SUBTYPE_HELPER_CTCU);
>>> + if (!helper)
>>> + return false;
>>> +
>>> + port = coresight_get_in_port_dest(csdev, helper);
>>> + if (port < 0)
>>> + return false;
>>> +
>>> + drvdata = dev_get_drvdata(helper->dev.parent);
>>> + /* Something wrong when initialize byte_cntr_read_ops */
>>> + if (!drvdata->byte_cntr_read_ops)
>>> + return false;
>>> +
>>> + byte_cntr_data = &drvdata->byte_cntr_data[port];
>>> + /* Return the pointer of the ctcu_drvdata if byte-cntr has
>>> enabled */
>>> + if (byte_cntr_data && byte_cntr_data->thresh_val) {
>>> + *data = (void *)drvdata->byte_cntr_read_ops;
>>> + return true;
>>> + }
>>> +
>>> + return false;
>>> +}
>>> +
>>> static const struct coresight_ops_helper ctcu_helper_ops = {
>>> .enable = ctcu_enable,
>>> .disable = ctcu_disable,
>>> + .qcom_byte_cntr_in_use = ctcu_qcom_byte_cntr_in_use,
>>
>> These ops structures are for generic functions used throughout the
>> devices. Do not put this function here.
>>
>> This is a specific ctcu helper. Make it external to the file and
>> declare it in coresight-ctcu.h
>
> Will address the comment in next version.
Hi Mike
Cant add an external function in ctcu-core.c and called in tmc-core.c
because there is a cycle dependency error:
depmod: ERROR: Cycle detected: coresight_tmc -> coresight_ctcu ->
coresight_tmc
depmod: ERROR: Found 2 modules in dependency cycles!
How about I add a function in tmc-core.c to directly retrieving the
sysfs_read_ops of the byte-cntr?
like below:
/* Return the byte-cntr's sysfs_read_ops if in use */
static const struct sysfs_read_ops *tmc_qcom_byte_cntr_in_use(struct
tmc_drvdata *drvdata)
{
struct ctcu_byte_cntr *byte_cntr_data;
struct ctcu_drvdata *ctcu_drvdata;
struct coresight_device *helper;
int port;
helper = coresight_get_helper(drvdata->csdev,
CORESIGHT_DEV_SUBTYPE_HELPER_CTCU);
if (!helper)
return NULL;
port = coresight_get_in_port_dest(drvdata->csdev, helper);
if (port < 0)
return NULL;
ctcu_drvdata = dev_get_drvdata(helper->dev.parent);
byte_cntr_data = &ctcu_drvdata->byte_cntr_data[port];
if (byte_cntr_data && byte_cntr_data->thresh_val)
return ctcu_drvdata->byte_cntr_sysfs_read_ops;
return NULL;
}
Thanks,
Jie
>
> Thanks,
> Jie
>
>>
>> Mike
>>
>>> };
>>>
>>> static const struct coresight_ops ctcu_ops = {
>>> diff --git a/include/linux/coresight.h b/include/linux/coresight.h
>>> index 4ac65c68bbf4..b5f052854b08 100644
>>> --- a/include/linux/coresight.h
>>> +++ b/include/linux/coresight.h
>>> @@ -419,11 +419,14 @@ struct coresight_ops_source {
>>> *
>>> * @enable : Enable the device
>>> * @disable : Disable the device
>>> + * @qcom_byte_cntr_in_use: check whether the byte-cntr is enabled.
>>> */
>>> struct coresight_ops_helper {
>>> int (*enable)(struct coresight_device *csdev, enum cs_mode
>>> mode,
>>> void *data);
>>> int (*disable)(struct coresight_device *csdev, void *data);
>>> + bool (*qcom_byte_cntr_in_use)(struct coresight_device *csdev,
>>> + void **data);
>>> };
>>>
>>>
>>> --
>>> 2.34.1
>>>
>>
>>
>
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