On 8/7/2023 5:42 PM, Suzuki K Poulose wrote:
On 25/07/2023 08:15, Tao Zhang wrote:
The nodes are needed to set or show the trigger timestamp and trigger type. This change is to add these nodes to achieve these function.
Signed-off-by: Tao Zhang quic_taozha@quicinc.com
.../ABI/testing/sysfs-bus-coresight-devices-tpdm | 24 ++++++ drivers/hwtracing/coresight/coresight-tpdm.c | 94 ++++++++++++++++++++++ 2 files changed, 118 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm index dbc2fbd0..0b7b4ad 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm @@ -21,3 +21,27 @@ Description: Accepts only one value - 1. 1 : Reset the dataset of the tpdm
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_trig_type +Date: March 2023 +KernelVersion 6.5 +Contact: Jinlong Mao (QUIC) quic_jinlmao@quicinc.com, Tao Zhang (QUIC) quic_taozha@quicinc.com +Description: + (Write) Set the trigger type of DSB tpdm. Read the trigger + type of DSB tpdm.
Please use: (RW) instead of (Write).
(RW) Set/Get the trigger type of the DSB for TPDM. Similarly for the items below.
I will update this in the next patch series.
+ Accepts only one of the 2 values - 0 or 1. + 0 : Set the DSB trigger type to false + 1 : Set the DSB trigger type to true
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_trig_ts +Date: March 2023 +KernelVersion 6.5 +Contact: Jinlong Mao (QUIC) quic_jinlmao@quicinc.com, Tao Zhang (QUIC) quic_taozha@quicinc.com +Description: + (Write) Set the trigger timestamp of DSB tpdm. Read the + trigger timestamp of DSB tpdm.
+ Accepts only one of the 2 values - 0 or 1. + 0 : Set the DSB trigger type to false + 1 : Set the DSB trigger type to true diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index acc3eea..62efc18 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -20,6 +20,18 @@ DEFINE_CORESIGHT_DEVLIST(tpdm_devs, "tpdm"); +static umode_t tpdm_dsb_is_visible(struct kobject *kobj, + struct attribute *attr, int n)
Please keep the alignment.
I will update this in the next patch series.
+{ + struct device *dev = kobj_to_dev(kobj); + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ if (drvdata && (drvdata->datasets & TPDM_PIDR0_DS_DSB))
As suggested earlier, add a wrapper for the above check.
I will update this in the next patch series.
+ return attr->mode;
+ return 0; +}
static void tpdm_reset_datasets(struct tpdm_drvdata *drvdata) { if (drvdata->datasets & TPDM_PIDR0_DS_DSB) { @@ -229,8 +241,90 @@ static struct attribute_group tpdm_attr_grp = { .attrs = tpdm_attrs, }; +static ssize_t dsb_trig_type_show(struct device *dev, + struct device_attribute *attr, char *buf)
Please follow the above alignment for all functions throughout the series. There are unaligned parameter lists scattered around the series.
I will update this in the next patch series.
Best,
Tao
+{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->dsb->trig_type); +}
+/*
- Trigger type (boolean):
- false - Disable trigger type.
- true - Enable trigger type.
- */
+static ssize_t dsb_trig_type_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val;
+ if ((kstrtoul(buf, 0, &val)) || (val & ~1UL)) + return -EINVAL;
+ spin_lock(&drvdata->spinlock); + if (val) + drvdata->dsb->trig_type = true; + else + drvdata->dsb->trig_type = false; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(dsb_trig_type);
+static ssize_t dsb_trig_ts_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->dsb->trig_ts); +}
+/*
- Trigger timestamp (boolean):
- false - Disable trigger timestamp.
- true - Enable trigger timestamp.
- */
+static ssize_t dsb_trig_ts_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val;
+ if ((kstrtoul(buf, 0, &val)) || (val & ~1UL)) + return -EINVAL;
+ spin_lock(&drvdata->spinlock); + if (val) + drvdata->dsb->trig_ts = true; + else + drvdata->dsb->trig_ts = false; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(dsb_trig_ts);
+static struct attribute *tpdm_dsb_attrs[] = { + &dev_attr_dsb_trig_ts.attr, + &dev_attr_dsb_trig_type.attr, + NULL, +};
+static struct attribute_group tpdm_dsb_attr_grp = { + .attrs = tpdm_dsb_attrs, + .is_visible = tpdm_dsb_is_visible, +};
static const struct attribute_group *tpdm_attr_grps[] = { &tpdm_attr_grp, + &tpdm_dsb_attr_grp, NULL, };
Rest looks fine.
Suzuk