diff options
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index aa9009fd2377..2c394e41b0c8 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -1567,6 +1567,146 @@ static ssize_t seq_reset_event_store(struct device *dev, } static DEVICE_ATTR_RW(seq_reset_event); +static ssize_t cntr_idx_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + val = drvdata->cntr_idx; + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t cntr_idx_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if (val >= drvdata->nr_cntr) + return -EINVAL; + + /* + * Use spinlock to ensure index doesn't change while it gets + * dereferenced multiple times within a spinlock block elsewhere. + */ + spin_lock(&drvdata->spinlock); + drvdata->cntr_idx = val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(cntr_idx); + +static ssize_t cntrldvr_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->cntr_idx; + val = drvdata->cntrldvr[idx]; + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t cntrldvr_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if (val > ETM_CNTR_MAX_VAL) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->cntr_idx; + drvdata->cntrldvr[idx] = val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(cntrldvr); + +static ssize_t cntr_val_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->cntr_idx; + val = drvdata->cntr_val[idx]; + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t cntr_val_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + if (val > ETM_CNTR_MAX_VAL) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->cntr_idx; + drvdata->cntr_val[idx] = val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(cntr_val); + +static ssize_t cntr_ctrl_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + spin_lock(&drvdata->spinlock); + idx = drvdata->cntr_idx; + val = drvdata->cntr_ctrl[idx]; + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t cntr_ctrl_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (kstrtoul(buf, 16, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = drvdata->cntr_idx; + drvdata->cntr_ctrl[idx] = val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(cntr_ctrl); + static ssize_t cpu_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1613,6 +1753,10 @@ static struct attribute *coresight_etmv4_attrs[] = { &dev_attr_seq_state.attr, &dev_attr_seq_event.attr, &dev_attr_seq_reset_event.attr, + &dev_attr_cntr_idx.attr, + &dev_attr_cntrldvr.attr, + &dev_attr_cntr_val.attr, + &dev_attr_cntr_ctrl.attr, &dev_attr_cpu.attr, NULL, }; |