Re: [PATCH v2 2/2] ath10k: allow user to toggle ani_enable via debugfs

[Ashok Raj Nagarajan <arnagara@qti.qualcomm.com>]

On Fri, Mar 20, 2015 at 10:28:06AM +0100, Jose Antonio Delgado Alfonso wrote:
> Hi Ashok,
> 
> Just a quick question, is it supported by all firmware versions?
> 
Yes Jose. It is supported by all firmware versions.

Thanks,
Ashok
> Thanks,
> Jose A. Delgado
> 
> On 19/03/15 12:08, Ashok Raj Nagarajan wrote:
> > Now that ANI is enabled by default, allow user to disable or enable ANI feature
> > from debugfs
> >
> > echo 0|1 > /sys/kernel/debug/ieee80211/phyX/ath10k/ani_enable
> >
> > Signed-off-by: Ashok Raj Nagarajan <arnagara@qti.qualcomm.com>
> > ---
> > v2:
> > Updated commit log
> > Lock ar->ani_enabled (Kalle Valo)
> > remove reduntant debug message (Kalle Valo)
> >
> >  drivers/net/wireless/ath/ath10k/core.h  |  2 ++
> >  drivers/net/wireless/ath/ath10k/debug.c | 58 +++++++++++++++++++++++++++++++++
> >  drivers/net/wireless/ath/ath10k/mac.c   |  2 ++
> >  3 files changed, 62 insertions(+)
> >
> > diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
> > index 7cba781..29e0a8b 100644
> > --- a/drivers/net/wireless/ath/ath10k/core.h
> > +++ b/drivers/net/wireless/ath/ath10k/core.h
> > @@ -510,6 +510,8 @@ struct ath10k {
> >  	u32 ht_cap_info;
> >  	u32 vht_cap_info;
> >  	u32 num_rf_chains;
> > +	/* protected by conf_mutex */
> > +	bool ani_enabled;
> >  
> >  	DECLARE_BITMAP(fw_features, ATH10K_FW_FEATURE_COUNT);
> >  
> > diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
> > index 301081d..481e1cc 100644
> > --- a/drivers/net/wireless/ath/ath10k/debug.c
> > +++ b/drivers/net/wireless/ath/ath10k/debug.c
> > @@ -1708,6 +1708,61 @@ static int ath10k_debug_cal_data_release(struct inode *inode,
> >  	return 0;
> >  }
> >  
> > +static ssize_t ath10k_write_ani_enable(struct file *file,
> > +				       const char __user *user_buf,
> > +				       size_t count, loff_t *ppos)
> > +{
> > +	struct ath10k *ar = file->private_data;
> > +	int ret;
> > +	u8 enable;
> > +
> > +	if (kstrtou8_from_user(user_buf, count, 0, &enable))
> > +		return -EINVAL;
> > +
> > +	mutex_lock(&ar->conf_mutex);
> > +
> > +	if (ar->ani_enabled == enable) {
> > +		ret = count;
> > +		goto exit;
> > +	}
> > +
> > +	ret = ath10k_wmi_pdev_set_param(ar, ar->wmi.pdev_param->ani_enable,
> > +					enable);
> > +	if (ret) {
> > +		ath10k_warn(ar, "ani_enable failed from debugfs: %d\n", ret);
> > +		goto exit;
> > +	}
> > +	ar->ani_enabled = enable;
> > +
> > +	ret = count;
> > +
> > +exit:
> > +	mutex_unlock(&ar->conf_mutex);
> > +
> > +	return ret;
> > +}
> > +
> > +static ssize_t ath10k_read_ani_enable(struct file *file, char __user *user_buf,
> > +				      size_t count, loff_t *ppos)
> > +{
> > +	struct ath10k *ar = file->private_data;
> > +	int len = 0;
> > +	char buf[32];
> > +
> > +	len = scnprintf(buf, sizeof(buf) - len, "%d\n",
> > +			ar->ani_enabled);
> > +
> > +	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
> > +}
> > +
> > +static const struct file_operations fops_ani_enable = {
> > +	.read = ath10k_read_ani_enable,
> > +	.write = ath10k_write_ani_enable,
> > +	.open = simple_open,
> > +	.owner = THIS_MODULE,
> > +	.llseek = default_llseek,
> > +};
> > +
> >  static const struct file_operations fops_cal_data = {
> >  	.open = ath10k_debug_cal_data_open,
> >  	.read = ath10k_debug_cal_data_read,
> > @@ -2068,6 +2123,9 @@ int ath10k_debug_register(struct ath10k *ar)
> >  	debugfs_create_file("cal_data", S_IRUSR, ar->debug.debugfs_phy,
> >  			    ar, &fops_cal_data);
> >  
> > +	debugfs_create_file("ani_enable", S_IRUSR | S_IWUSR,
> > +			    ar->debug.debugfs_phy, ar, &fops_ani_enable);
> > +
> >  	debugfs_create_file("nf_cal_period", S_IRUSR | S_IWUSR,
> >  			    ar->debug.debugfs_phy, ar, &fops_nf_cal_period);
> >  
> > diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
> > index 380d4b1..366c96f 100644
> > --- a/drivers/net/wireless/ath/ath10k/mac.c
> > +++ b/drivers/net/wireless/ath/ath10k/mac.c
> > @@ -2904,6 +2904,8 @@ static int ath10k_start(struct ieee80211_hw *hw)
> >  		goto err_core_stop;
> >  	}
> >  
> > +	ar->ani_enabled = true;
> > +
> >  	ar->num_started_vdevs = 0;
> >  	ath10k_regd_update(ar);
> >  
> 
> 
> -- 
> 
> ------------------------------------------------------------------------
> Jose Antonio Delgado Alfonso
> Chief Technology Officer
> 
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