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Message-ID: <20211105082625.GE25738@jinlmao-gv.ap.qualcomm.com>
Date: Fri, 5 Nov 2021 16:26:30 +0800
From: Jinlong <quic_jinlmao@...cinc.com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>
CC: Tao Zhang <quic_taozha@...cinc.com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
<coresight@...ts.linaro.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
Tingwei Zhang <quic_tingweiz@...cinc.com>,
Yuanfang Zhang <quic_yuanfang@...cinc.com>,
Trilok Soni <quic_tsoni@...cinc.com>
Subject: Re: [PATCH 05/10] Coresight: Add interface for TPDM BC subunit
On Thu, Nov 04, 2021 at 12:01:06PM -0600, Mathieu Poirier wrote:
> On Thu, Oct 21, 2021 at 03:38:51PM +0800, Tao Zhang wrote:
> > The BC(Basic Counters) interface has RW, WO and RO fields for
> > controlling BC dataset elements transmitted on ATB flush.
> > The BC data set subunit supports from 1-32 counter instances
> > allowing for collection of BC data sets.
> >
> > Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
> > ---
> > drivers/hwtracing/coresight/coresight-tpdm.c | 873 +++++++++++++++++++
> > 1 file changed, 873 insertions(+)
> >
> > diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
> > index c0a01979e42f..0970c69ac8e2 100644
> > --- a/drivers/hwtracing/coresight/coresight-tpdm.c
> > +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
> > @@ -668,6 +668,878 @@ static ssize_t gp_regs_store(struct device *dev,
> > }
> > static DEVICE_ATTR_RW(gp_regs);
> >
> > +static ssize_t bc_capture_mode_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
>
> Indentation. I won't repeat this comment but please make sure it is fixed for
> the entire patchset.
>
We will fix it for entire patchset.
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%s\n",
> > + drvdata->bc->capture_mode == TPDM_MODE_ATB ?
> > + "ATB" : "APB");
> > +}
> > +
> > +static ssize_t bc_capture_mode_store(struct device *dev,
> > + struct device_attribute *attr,
> > + const char *buf,
> > + size_t size)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + char str[20] = "";
>
> char str[4];
>
> > + uint32_t val;
> > +
> > + if (size >= 20)
> > + return -EINVAL;
> > + if (sscanf(buf, "%s", str) != 1)
>
> if (sscanf(buf, "%3s", str) != 1)
>
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
>
> return -EINVAL;
>
> Please make sure this is fixed everywhere, except when -EINVAL is really
> the right error code.
>
We will check and update.
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
>
> Why does the device need to be enabled for this operation? Again no comments...
>
We will add comments for this.
> > + }
> > +
> > + if (!strcmp(str, "ATB")) {
> > + drvdata->bc->capture_mode = TPDM_MODE_ATB;
> > + } else if (!strcmp(str, "APB") &&
> > + drvdata->bc->retrieval_mode == TPDM_MODE_APB) {
> > +
> > + TPDM_UNLOCK(drvdata);
> > + val = tpdm_readl(drvdata, TPDM_BC_CR);
> > + val = val | BIT(3);
> > + tpdm_writel(drvdata, val, TPDM_BC_CR);
> > + TPDM_LOCK(drvdata);
> > +
> > + drvdata->bc->capture_mode = TPDM_MODE_APB;
> > + } else {
> > + mutex_unlock(&drvdata->lock);
> > + return -EINVAL;
> > + }
> > +
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_capture_mode);
> > +
> > +static ssize_t bc_retrieval_mode_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%s\n",
> > + drvdata->bc->retrieval_mode == TPDM_MODE_ATB ?
> > + "ATB" : "APB");
> > +}
> > +
> > +static ssize_t bc_retrieval_mode_store(struct device *dev,
> > + struct device_attribute *attr,
> > + const char *buf,
> > + size_t size)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + char str[20] = "";
> > +
> > + if (size >= 20)
> > + return -EINVAL;
> > + if (sscanf(buf, "%s", str) != 1)
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
>
> Same here, I don't know why the device needs to be enabled for this to success.
> Please fix everywhere.
>
> > + }
> > +
> > + if (!strcmp(str, "ATB")) {
> > + drvdata->bc->retrieval_mode = TPDM_MODE_ATB;
> > + } else if (!strcmp(str, "APB")) {
> > + drvdata->bc->retrieval_mode = TPDM_MODE_APB;
> > + } else {
> > + mutex_unlock(&drvdata->lock);
> > + return -EINVAL;
> > + }
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_retrieval_mode);
> > +
> > +static ssize_t bc_reset_counters_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + if (val) {
> > + TPDM_UNLOCK(drvdata);
> > + val = tpdm_readl(drvdata, TPDM_BC_CR);
> > + val = val | BIT(1);
> > + tpdm_writel(drvdata, val, TPDM_BC_CR);
> > + TPDM_LOCK(drvdata);
> > + }
> > +
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_WO(bc_reset_counters);
> > +
> > +static ssize_t bc_sat_mode_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n",
> > + (unsigned long)drvdata->bc->sat_mode);
>
> return scnprintf(buf, PAGE_SIZE, "%#x\n", drvdata->bc->sat_mode);
>
> And everywhere casting in used...
>
>
We will upadte it.
> > +}
> > +
> > +static ssize_t bc_sat_mode_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->sat_mode = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_sat_mode);
> > +
> > +static ssize_t bc_enable_counters_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n",
> > + (unsigned long)drvdata->bc->enable_counters);
> > +}
> > +
> > +static ssize_t bc_enable_counters_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->enable_counters = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_enable_counters);
> > +
> > +static ssize_t bc_clear_counters_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n",
> > + (unsigned long)drvdata->bc->clear_counters);
> > +}
> > +
> > +static ssize_t bc_clear_counters_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->clear_counters = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_clear_counters);
> > +
> > +static ssize_t bc_enable_irq_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n",
> > + (unsigned long)drvdata->bc->enable_irq);
> > +}
> > +
> > +static ssize_t bc_enable_irq_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->enable_irq = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_enable_irq);
> > +
> > +static ssize_t bc_clear_irq_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n",
> > + (unsigned long)drvdata->bc->clear_irq);
> > +}
> > +
> > +static ssize_t bc_clear_irq_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->clear_irq = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_clear_irq);
> > +
> > +static ssize_t bc_trig_val_lo_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + ssize_t size = 0;
> > + int i = 0;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + for (i = 0; i < TPDM_BC_MAX_COUNTERS; i++)
> > + size += scnprintf(buf + size, PAGE_SIZE - size,
> > + "Index: 0x%x Value: 0x%x\n", i,
> > + drvdata->bc->trig_val_lo[i]);
>
> As previously stated, the sysfs interface should output single line and single
> values. I won't comment on this again, please fix everywhere.
>
We will fix it.
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +
> > +static ssize_t bc_trig_val_lo_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 index, val;
> > +
> > + if (sscanf(buf, "%lx %lx", &index, &val) != 2)
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets) ||
> > + index >= drvdata->bc_counters_avail ||
> > + drvdata->bc_trig_type == TPDM_SUPPORT_TYPE_NO ||
> > + (drvdata->bc_trig_type == TPDM_SUPPORT_TYPE_PARTIAL && index > 0))
> > + return -EPERM;
> >
>
> This is hard to read and maintain. Please break it up in multiple if()
> statements.
>
We will address your comments.
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->trig_val_lo[index] = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_trig_val_lo);
> > +
> > +static ssize_t bc_trig_val_hi_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + ssize_t size = 0;
> > + int i = 0;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + for (i = 0; i < TPDM_BC_MAX_COUNTERS; i++)
> > + size += scnprintf(buf + size, PAGE_SIZE - size,
> > + "Index: 0x%x Value: 0x%x\n", i,
> > + drvdata->bc->trig_val_hi[i]);
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +
> > +static ssize_t bc_trig_val_hi_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 index, val;
> > +
> > + if (sscanf(buf, "%lx %lx", &index, &val) != 2)
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets) ||
> > + index >= drvdata->bc_counters_avail ||
> > + drvdata->bc_trig_type == TPDM_SUPPORT_TYPE_NO ||
> > + (drvdata->bc_trig_type == TPDM_SUPPORT_TYPE_PARTIAL && index > 0))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->trig_val_hi[index] = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_trig_val_hi);
> > +
> > +static ssize_t bc_enable_ganging_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n",
> > + (unsigned long)drvdata->bc->enable_ganging);
> > +}
> > +
> > +static ssize_t bc_enable_ganging_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->enable_ganging = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_enable_ganging);
> > +
> > +static ssize_t bc_overflow_val_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + ssize_t size = 0;
> > + int i = 0;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + for (i = 0; i < TPDM_BC_MAX_OVERFLOW; i++)
> > + size += scnprintf(buf + size, PAGE_SIZE - size,
> > + "Index: 0x%x Value: 0x%x\n", i,
> > + drvdata->bc->overflow_val[i]);
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +
> > +static ssize_t bc_overflow_val_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 index, val;
> > +
> > + if (sscanf(buf, "%lx %lx", &index, &val) != 2)
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets) ||
> > + index >= TPDM_BC_MAX_OVERFLOW)
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->overflow_val[index] = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_overflow_val);
> > +
> > +static ssize_t bc_ovsr_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + unsigned long val;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + val = tpdm_readl(drvdata, TPDM_BC_OVSR);
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n", val);
> > +}
> > +
> > +static ssize_t bc_ovsr_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + if (val) {
> > + TPDM_UNLOCK(drvdata);
> > + tpdm_writel(drvdata, val, TPDM_BC_OVSR);
> > + TPDM_LOCK(drvdata);
> > + }
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_ovsr);
> > +
> > +static ssize_t bc_counter_sel_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + unsigned long val;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + val = tpdm_readl(drvdata, TPDM_BC_SELR);
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n", val);
> > +}
> > +
> > +static ssize_t bc_counter_sel_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable || val >= drvdata->bc_counters_avail) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + tpdm_writel(drvdata, val, TPDM_BC_SELR);
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_counter_sel);
> > +
> > +static ssize_t bc_count_val_lo_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + unsigned long val;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + val = tpdm_readl(drvdata, TPDM_BC_CNTR_LO);
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n", val);
> > +}
> > +
> > +static ssize_t bc_count_val_lo_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, select;
> > +
> > + if (kstrtoul(buf, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + if (val) {
>
> if (!val) {
> mutex_unlock(&drvdata->lock);
> return -EINVAL;
> }
>
We will update it.
> > + TPDM_UNLOCK(drvdata);
> > + select = tpdm_readl(drvdata, TPDM_BC_SELR);
> > +
> > + /* Check if selected counter is disabled */
> > + if (BMVAL(tpdm_readl(drvdata, TPDM_BC_CNTENSET), select, select)) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + tpdm_writel(drvdata, val, TPDM_BC_CNTR_LO);
> > + TPDM_LOCK(drvdata);
> > + }
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_count_val_lo);
> > +
> > +static ssize_t bc_count_val_hi_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + unsigned long val;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + val = tpdm_readl(drvdata, TPDM_BC_CNTR_HI);
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n", val);
> > +}
> > +
> > +static ssize_t bc_count_val_hi_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, select;
> > +
> > + if (kstrtoul(buf, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + if (val) {
>
> Same
>
We will update it.
> > + TPDM_UNLOCK(drvdata);
> > + select = tpdm_readl(drvdata, TPDM_BC_SELR);
> > +
> > + /* Check if selected counter is disabled */
> > + if (BMVAL(tpdm_readl(drvdata, TPDM_BC_CNTENSET), select, select)) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + tpdm_writel(drvdata, val, TPDM_BC_CNTR_HI);
> > + TPDM_LOCK(drvdata);
> > + }
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_count_val_hi);
> > +
> > +static ssize_t bc_shadow_val_lo_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + ssize_t size = 0;
> > + int i = 0;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + for (i = 0; i < drvdata->bc_counters_avail; i++) {
> > + size += scnprintf(buf + size, PAGE_SIZE - size,
> > + "Index: 0x%x Value: 0x%x\n", i,
> > + tpdm_readl(drvdata, TPDM_BC_SHADOW_LO(i)));
> > + }
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RO(bc_shadow_val_lo);
> > +
> > +static ssize_t bc_shadow_val_hi_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + ssize_t size = 0;
> > + int i = 0;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + for (i = 0; i < drvdata->bc_counters_avail; i++)
> > + size += scnprintf(buf + size, PAGE_SIZE - size,
> > + "Index: 0x%x Value: 0x%x\n", i,
> > + tpdm_readl(drvdata, TPDM_BC_SHADOW_HI(i)));
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RO(bc_shadow_val_hi);
> > +
> > +static ssize_t bc_sw_inc_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + unsigned long val;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + TPDM_UNLOCK(drvdata);
> > + val = tpdm_readl(drvdata, TPDM_BC_SWINC);
> > + TPDM_LOCK(drvdata);
> > + mutex_unlock(&drvdata->lock);
> > + return scnprintf(buf, PAGE_SIZE, "%lx\n", val);
> > +}
> > +
> > +static ssize_t bc_sw_inc_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, 16, &val))
> > + return -EINVAL;
> > + if (!test_bit(TPDM_DS_BC, drvdata->enable_ds))
> > + return -EPERM;
> > +
> > + mutex_lock(&drvdata->lock);
> > + if (!drvdata->enable) {
> > + mutex_unlock(&drvdata->lock);
> > + return -EPERM;
> > + }
> > +
> > + if (val) {
> > + TPDM_UNLOCK(drvdata);
> > + tpdm_writel(drvdata, val, TPDM_BC_SWINC);
> > + TPDM_LOCK(drvdata);
> > + }
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_sw_inc);
> > +
> > +static ssize_t bc_msr_show(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + unsigned int i;
> > + ssize_t len = 0;
> > +
> > + if (!drvdata->msr_support)
> > + return -EINVAL;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + for (i = 0; i < TPDM_BC_MAX_MSR; i++)
> > + len += scnprintf(buf + len, PAGE_SIZE - len, "%u 0x%x\n",
> > + i, drvdata->bc->msr[i]);
> > +
> > + return len;
> > +}
> > +
> > +static ssize_t bc_msr_store(struct device *dev,
> > + struct device_attribute *attr,
> > + const char *buf,
> > + size_t size)
> > +{
> > + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
> > + unsigned int num, val;
> > + int nval;
> > +
> > + if (!drvdata->msr_support)
> > + return -EINVAL;
> > +
> > + if (!test_bit(TPDM_DS_BC, drvdata->datasets))
> > + return -EPERM;
> > +
> > + nval = sscanf(buf, "%u %x", &num, &val);
> > + if (nval != 2)
> > + return -EINVAL;
> > +
> > + if (num >= TPDM_BC_MAX_MSR)
> > + return -EINVAL;
> > +
> > + mutex_lock(&drvdata->lock);
> > + drvdata->bc->msr[num] = val;
> > + mutex_unlock(&drvdata->lock);
> > + return size;
> > +}
> > +static DEVICE_ATTR_RW(bc_msr);
> > +
> > +static struct attribute *tpdm_bc_attrs[] = {
> > + &dev_attr_bc_capture_mode.attr,
> > + &dev_attr_bc_retrieval_mode.attr,
> > + &dev_attr_bc_reset_counters.attr,
> > + &dev_attr_bc_sat_mode.attr,
> > + &dev_attr_bc_enable_counters.attr,
> > + &dev_attr_bc_clear_counters.attr,
> > + &dev_attr_bc_enable_irq.attr,
> > + &dev_attr_bc_clear_irq.attr,
> > + &dev_attr_bc_trig_val_lo.attr,
> > + &dev_attr_bc_trig_val_hi.attr,
> > + &dev_attr_bc_enable_ganging.attr,
> > + &dev_attr_bc_overflow_val.attr,
> > + &dev_attr_bc_ovsr.attr,
> > + &dev_attr_bc_counter_sel.attr,
> > + &dev_attr_bc_count_val_lo.attr,
> > + &dev_attr_bc_count_val_hi.attr,
> > + &dev_attr_bc_shadow_val_lo.attr,
> > + &dev_attr_bc_shadow_val_hi.attr,
> > + &dev_attr_bc_sw_inc.attr,
> > + &dev_attr_bc_msr.attr,
> > + NULL,
>
> This will result in a very crowded directory. Please move under a "bc"
> subdirectory. And as I commented before, all sysfs entries need to be
> documented under Documentation/ABI/testing.
>
We will check and update.
> > +};
> > +
> > +static struct attribute_group tpdm_bc_attr_grp = {
> > + .attrs = tpdm_bc_attrs,
> > +};
> > +
> > static struct attribute *tpdm_attrs[] = {
> > &dev_attr_available_datasets.attr,
> > &dev_attr_enable_datasets.attr,
> > @@ -682,6 +1554,7 @@ static struct attribute_group tpdm_attr_grp = {
> > };
> > static const struct attribute_group *tpdm_attr_grps[] = {
> > &tpdm_attr_grp,
> > + &tpdm_bc_attr_grp,
>
> It is quite tedious to review all these options at the same time as the core
> drivers. I suggest to concentrate on the base functionality for now. When that
> is merged we can add configuration options such as these.
>
> I am out of time for this patchset and as such will not review the remaining
> patches - those will have to wait for another iteration.
>
> Thanks,
> Mathieu
Thank your for all the comments.
We will update the patches.
Thanks
Jinlong Mao
>
> > NULL,
> > };
> >
> > --
> > 2.17.1
> >
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