| Message ID | 1674114105-16651-5-git-send-email-quic_taozha@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support to configure TPDM DSB subunit | expand |
On 19/01/2023 07:41, Tao Zhang wrote: > TPDM device need a node to reset the configurations and status of > it. So as to avoid the previous configurations affecting the > current use, the configurations need to be reset first. And in > some scenarios, it may be necessary to reset the TPDM > configurations to complete the verification of certain function. > 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> > Signed-off-by: Tao Zhang <taozha@qti.qualcomm.com> > --- > drivers/hwtracing/coresight/coresight-tpdm.c | 32 ++++++++++++++++++++++++++++ > 1 file changed, 32 insertions(+) > > diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c > index 6befc87..c29d667d 100644 > --- a/drivers/hwtracing/coresight/coresight-tpdm.c > +++ b/drivers/hwtracing/coresight/coresight-tpdm.c > @@ -161,6 +161,37 @@ static void tpdm_init_default_data(struct tpdm_drvdata *drvdata) > } > } > > +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, 0, &val); > + if (ret || (val != 1)) > + return -EINVAL; > + > + spin_lock(&drvdata->spinlock); > + /* Reset all datasets to ZERO */ > + if (drvdata->dsb != NULL) > + memset(drvdata->dsb, 0, sizeof(struct dsb_dataset)); > + > + /* Init the default data */ Code is self explanatory, don't need a comment here. > + tpdm_init_default_data(drvdata); Could this be helper be renamed to tpdm_reset_dsb_data() ? Because, that is what it does now. > + > + spin_unlock(&drvdata->spinlock); > + > + /* Disable tpdm if enabled */ > + if (drvdata->enable) > + coresight_disable(drvdata->csdev); Woh, where did that come from ? Don't you have a disable handle ? > + > + return size; > +} > +static DEVICE_ATTR_WO(reset); > + This looks a bit pointless to me, given we have separate controls for all that is being achieved above. Suzuki > /* > * value 1: 64 bits test data > * value 2: 32 bits test data > @@ -201,6 +232,7 @@ 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, > };
在 2/28/2023 7:22 PM, Suzuki K Poulose 写道: > On 19/01/2023 07:41, Tao Zhang wrote: >> TPDM device need a node to reset the configurations and status of >> it. So as to avoid the previous configurations affecting the >> current use, the configurations need to be reset first. And in >> some scenarios, it may be necessary to reset the TPDM >> configurations to complete the verification of certain function. >> 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> >> Signed-off-by: Tao Zhang <taozha@qti.qualcomm.com> >> --- >> drivers/hwtracing/coresight/coresight-tpdm.c | 32 >> ++++++++++++++++++++++++++++ >> 1 file changed, 32 insertions(+) >> >> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c >> b/drivers/hwtracing/coresight/coresight-tpdm.c >> index 6befc87..c29d667d 100644 >> --- a/drivers/hwtracing/coresight/coresight-tpdm.c >> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c >> @@ -161,6 +161,37 @@ static void tpdm_init_default_data(struct >> tpdm_drvdata *drvdata) >> } >> } >> +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, 0, &val); >> + if (ret || (val != 1)) >> + return -EINVAL; >> + >> + spin_lock(&drvdata->spinlock); >> + /* Reset all datasets to ZERO */ >> + if (drvdata->dsb != NULL) >> + memset(drvdata->dsb, 0, sizeof(struct dsb_dataset)); >> + >> + /* Init the default data */ > > Code is self explanatory, don't need a comment here. OK, got it. > >> + tpdm_init_default_data(drvdata); > > Could this be helper be renamed to > > tpdm_reset_dsb_data() ? > > Because, that is what it does now. Sure, I will change its name as "tpdm_reset_data()" since DSB is only one of the data type which TPDM supports. > >> + >> + spin_unlock(&drvdata->spinlock); >> + >> + /* Disable tpdm if enabled */ >> + if (drvdata->enable) >> + coresight_disable(drvdata->csdev); > > Woh, where did that come from ? Don't you have a disable handle ? The function "coresight_disable" is defined in the file "coresight-core.c". This is a generic disablement handle. > >> + >> + return size; >> +} >> +static DEVICE_ATTR_WO(reset); >> + > > This looks a bit pointless to me, given we have separate controls for > all that is being achieved above. I will move the function of resetting all datasets to zero to "tpdm_disable". Thanks for your advice. > > Suzuki > >> /* >> * value 1: 64 bits test data >> * value 2: 32 bits test data >> @@ -201,6 +232,7 @@ 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, >> }; > Best, Tao
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index 6befc87..c29d667d 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -161,6 +161,37 @@ static void tpdm_init_default_data(struct tpdm_drvdata *drvdata) } } +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, 0, &val); + if (ret || (val != 1)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + /* Reset all datasets to ZERO */ + if (drvdata->dsb != NULL) + memset(drvdata->dsb, 0, sizeof(struct dsb_dataset)); + + /* Init the default data */ + tpdm_init_default_data(drvdata); + + spin_unlock(&drvdata->spinlock); + + /* Disable tpdm if enabled */ + if (drvdata->enable) + coresight_disable(drvdata->csdev); + + return size; +} +static DEVICE_ATTR_WO(reset); + /* * value 1: 64 bits test data * value 2: 32 bits test data @@ -201,6 +232,7 @@ 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, };