From: Janusz Dziedzic <janusz.dziedzic@tieto.com> To: Simon Wunderlich <sw@simonwunderlich.de> Cc: "ath10k@lists.infradead.org" <ath10k@lists.infradead.org>, ath9k-devel <ath9k-devel@qca.qualcomm.com>, Mathias Kretschmer <mathias.kretschmer@fit.fraunhofer.de>, linux-wireless@vger.kernel.org Subject: Re: [PATCH 3/3] ath9k: add noise floor override option Date: Fri, 17 Mar 2017 09:48:07 +0100 [thread overview] Message-ID: <CALhHN=qNXW6FVr_Q4B7pmLN2UVywa2dWdZtnhwV+9AAqUO=EAQ@mail.gmail.com> (raw) In-Reply-To: <20170316151337.24163-4-sw@simonwunderlich.de> On 16 March 2017 at 16:13, Simon Wunderlich <sw@simonwunderlich.de> wrote: > Introduce a debugfs option to manually override the noise floor, > ignoring the automatically tuned noise floor of the driver/hw. > > In my tests with a AR9580 based module and a tx99 5 MHz interferer, > I could tune the noisefloor to -95 dBm or above to allow communication > again. The automatic noise floor calibration sometimes could adapt to > the situation as well, but not reliably and permanently. > > I would consider this "feature" experimental and interesting for people > debugging the noise floor calibration or other effects of the hardware. > > Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> > Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fit.fraunhofer.de> > --- > drivers/net/wireless/ath/ath9k/calib.c | 5 ++- > drivers/net/wireless/ath/ath9k/debug.c | 62 ++++++++++++++++++++++++++++++++++ > drivers/net/wireless/ath/ath9k/hw.h | 1 + > 3 files changed, 67 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c > index 0f71146b781d..13ab6bc46775 100644 > --- a/drivers/net/wireless/ath/ath9k/calib.c > +++ b/drivers/net/wireless/ath/ath9k/calib.c > @@ -254,7 +254,9 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) > if ((i >= AR5416_MAX_CHAINS) && !IS_CHAN_HT40(chan)) > continue; > > - if (h) > + if (ah->nf_override) > + nfval = ah->nf_override; > + else if (h) > nfval = h[i].privNF; > else > nfval = default_nf; > @@ -348,6 +350,7 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) > > return 0; > } > +EXPORT_SYMBOL(ath9k_hw_loadnf); > > > static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf) > diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c > index 43930c336987..2e64977a8ab6 100644 > --- a/drivers/net/wireless/ath/ath9k/debug.c > +++ b/drivers/net/wireless/ath/ath9k/debug.c > @@ -1191,6 +1191,65 @@ static const struct file_operations fops_tpc = { > .llseek = default_llseek, > }; > > +static ssize_t read_file_nf_override(struct file *file, > + char __user *user_buf, > + size_t count, loff_t *ppos) > +{ > + struct ath_softc *sc = file->private_data; > + struct ath_hw *ah = sc->sc_ah; > + char buf[32]; > + unsigned int len; > + > + if (ah->nf_override == 0) > + len = sprintf(buf, "off\n"); > + else > + len = sprintf(buf, "%d\n", ah->nf_override); > + > + return simple_read_from_buffer(user_buf, count, ppos, buf, len); > +} > + > +static ssize_t write_file_nf_override(struct file *file, > + const char __user *user_buf, > + size_t count, loff_t *ppos) > +{ > + struct ath_softc *sc = file->private_data; > + struct ath_hw *ah = sc->sc_ah; > + long val; > + char buf[32]; > + ssize_t len; > + > + len = min(count, sizeof(buf) - 1); > + if (copy_from_user(buf, user_buf, len)) > + return -EFAULT; > + > + buf[len] = '\0'; > + if (strncmp("off", buf, 3) == 0) > + val = 0; > + else if (kstrtol(buf, 0, &val)) > + return -EINVAL; > + > + if (val > 0) > + return -EINVAL; > + > + if (val < -120) > + return -EINVAL; > + > + ah->nf_override = val; > + > + if (ah->curchan) > + ath9k_hw_loadnf(ah, ah->curchan); > + > + return count; > +} > + > +static const struct file_operations fops_nf_override = { > + .read = read_file_nf_override, > + .write = write_file_nf_override, > + .open = simple_open, > + .owner = THIS_MODULE, > + .llseek = default_llseek, > +}; > + > /* Ethtool support for get-stats */ > > #define AMKSTR(nm) #nm "_BE", #nm "_BK", #nm "_VI", #nm "_VO" > @@ -1402,5 +1461,8 @@ int ath9k_init_debug(struct ath_hw *ah) > debugfs_create_u16("airtime_flags", S_IRUSR | S_IWUSR, > sc->debug.debugfs_phy, &sc->airtime_flags); > > + debugfs_create_file("nf_override", S_IRUSR | S_IWUSR, > + sc->debug.debugfs_phy, sc, &fops_nf_override); > + Why not simply: debugfs_create_u32("nf_override", S_IRUSR|S_IWUSR , sc->debug.debugfs_phy, &ah->nf_override); One line patch :) > return 0; > } > diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h > index 496e3cd1b509..eba478f052b9 100644 > --- a/drivers/net/wireless/ath/ath9k/hw.h > +++ b/drivers/net/wireless/ath/ath9k/hw.h > @@ -803,6 +803,7 @@ struct ath_hw { > u32 rfkill_gpio; > u32 rfkill_polarity; > u32 ah_flags; > + s16 nf_override; > > bool reset_power_on; > bool htc_reset_init; > -- > 2.11.0 > > > _______________________________________________ > ath10k mailing list > ath10k@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/ath10k
WARNING: multiple messages have this Message-ID (diff)
From: Janusz Dziedzic <janusz.dziedzic@tieto.com> To: Simon Wunderlich <sw@simonwunderlich.de> Cc: Mathias Kretschmer <mathias.kretschmer@fit.fraunhofer.de>, linux-wireless@vger.kernel.org, ath9k-devel <ath9k-devel@qca.qualcomm.com>, "ath10k@lists.infradead.org" <ath10k@lists.infradead.org> Subject: Re: [PATCH 3/3] ath9k: add noise floor override option Date: Fri, 17 Mar 2017 09:48:07 +0100 [thread overview] Message-ID: <CALhHN=qNXW6FVr_Q4B7pmLN2UVywa2dWdZtnhwV+9AAqUO=EAQ@mail.gmail.com> (raw) In-Reply-To: <20170316151337.24163-4-sw@simonwunderlich.de> On 16 March 2017 at 16:13, Simon Wunderlich <sw@simonwunderlich.de> wrote: > Introduce a debugfs option to manually override the noise floor, > ignoring the automatically tuned noise floor of the driver/hw. > > In my tests with a AR9580 based module and a tx99 5 MHz interferer, > I could tune the noisefloor to -95 dBm or above to allow communication > again. The automatic noise floor calibration sometimes could adapt to > the situation as well, but not reliably and permanently. > > I would consider this "feature" experimental and interesting for people > debugging the noise floor calibration or other effects of the hardware. > > Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> > Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fit.fraunhofer.de> > --- > drivers/net/wireless/ath/ath9k/calib.c | 5 ++- > drivers/net/wireless/ath/ath9k/debug.c | 62 ++++++++++++++++++++++++++++++++++ > drivers/net/wireless/ath/ath9k/hw.h | 1 + > 3 files changed, 67 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c > index 0f71146b781d..13ab6bc46775 100644 > --- a/drivers/net/wireless/ath/ath9k/calib.c > +++ b/drivers/net/wireless/ath/ath9k/calib.c > @@ -254,7 +254,9 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) > if ((i >= AR5416_MAX_CHAINS) && !IS_CHAN_HT40(chan)) > continue; > > - if (h) > + if (ah->nf_override) > + nfval = ah->nf_override; > + else if (h) > nfval = h[i].privNF; > else > nfval = default_nf; > @@ -348,6 +350,7 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) > > return 0; > } > +EXPORT_SYMBOL(ath9k_hw_loadnf); > > > static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf) > diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c > index 43930c336987..2e64977a8ab6 100644 > --- a/drivers/net/wireless/ath/ath9k/debug.c > +++ b/drivers/net/wireless/ath/ath9k/debug.c > @@ -1191,6 +1191,65 @@ static const struct file_operations fops_tpc = { > .llseek = default_llseek, > }; > > +static ssize_t read_file_nf_override(struct file *file, > + char __user *user_buf, > + size_t count, loff_t *ppos) > +{ > + struct ath_softc *sc = file->private_data; > + struct ath_hw *ah = sc->sc_ah; > + char buf[32]; > + unsigned int len; > + > + if (ah->nf_override == 0) > + len = sprintf(buf, "off\n"); > + else > + len = sprintf(buf, "%d\n", ah->nf_override); > + > + return simple_read_from_buffer(user_buf, count, ppos, buf, len); > +} > + > +static ssize_t write_file_nf_override(struct file *file, > + const char __user *user_buf, > + size_t count, loff_t *ppos) > +{ > + struct ath_softc *sc = file->private_data; > + struct ath_hw *ah = sc->sc_ah; > + long val; > + char buf[32]; > + ssize_t len; > + > + len = min(count, sizeof(buf) - 1); > + if (copy_from_user(buf, user_buf, len)) > + return -EFAULT; > + > + buf[len] = '\0'; > + if (strncmp("off", buf, 3) == 0) > + val = 0; > + else if (kstrtol(buf, 0, &val)) > + return -EINVAL; > + > + if (val > 0) > + return -EINVAL; > + > + if (val < -120) > + return -EINVAL; > + > + ah->nf_override = val; > + > + if (ah->curchan) > + ath9k_hw_loadnf(ah, ah->curchan); > + > + return count; > +} > + > +static const struct file_operations fops_nf_override = { > + .read = read_file_nf_override, > + .write = write_file_nf_override, > + .open = simple_open, > + .owner = THIS_MODULE, > + .llseek = default_llseek, > +}; > + > /* Ethtool support for get-stats */ > > #define AMKSTR(nm) #nm "_BE", #nm "_BK", #nm "_VI", #nm "_VO" > @@ -1402,5 +1461,8 @@ int ath9k_init_debug(struct ath_hw *ah) > debugfs_create_u16("airtime_flags", S_IRUSR | S_IWUSR, > sc->debug.debugfs_phy, &sc->airtime_flags); > > + debugfs_create_file("nf_override", S_IRUSR | S_IWUSR, > + sc->debug.debugfs_phy, sc, &fops_nf_override); > + Why not simply: debugfs_create_u32("nf_override", S_IRUSR|S_IWUSR , sc->debug.debugfs_phy, &ah->nf_override); One line patch :) > return 0; > } > diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h > index 496e3cd1b509..eba478f052b9 100644 > --- a/drivers/net/wireless/ath/ath9k/hw.h > +++ b/drivers/net/wireless/ath/ath9k/hw.h > @@ -803,6 +803,7 @@ struct ath_hw { > u32 rfkill_gpio; > u32 rfkill_polarity; > u32 ah_flags; > + s16 nf_override; > > bool reset_power_on; > bool htc_reset_init; > -- > 2.11.0 > > > _______________________________________________ > ath10k mailing list > ath10k@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/ath10k _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k
next prev parent reply other threads:[~2017-03-17 8:48 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-03-16 15:13 [PATCH 0/3] Channels in licensed bands, noise floor override Simon Wunderlich 2017-03-16 15:13 ` Simon Wunderlich 2017-03-16 15:13 ` [PATCH 1/3] ath9k: Support channels in licensed bands Simon Wunderlich 2017-03-16 15:13 ` Simon Wunderlich 2017-03-17 13:40 ` Zefir Kurtisi 2017-03-17 13:40 ` Zefir Kurtisi 2017-03-17 14:02 ` Simon Wunderlich 2017-03-17 14:02 ` Simon Wunderlich 2017-03-17 16:00 ` [PATCHv2 " Simon Wunderlich 2017-03-17 16:00 ` Simon Wunderlich 2017-03-16 15:13 ` [PATCH 2/3] ath10k: add support for " Simon Wunderlich 2017-03-16 15:13 ` Simon Wunderlich 2017-03-17 18:49 ` Sebastian Gottschall 2017-03-17 18:49 ` Sebastian Gottschall 2017-03-23 9:00 ` Simon Wunderlich 2017-03-23 9:00 ` Simon Wunderlich 2017-03-16 15:13 ` [PATCH 3/3] ath9k: add noise floor override option Simon Wunderlich 2017-03-16 15:13 ` Simon Wunderlich 2017-03-17 8:48 ` Janusz Dziedzic [this message] 2017-03-17 8:48 ` Janusz Dziedzic 2017-03-17 8:55 ` Simon Wunderlich 2017-03-17 8:55 ` Simon Wunderlich 2017-03-17 12:44 ` Janusz Dziedzic 2017-03-17 12:44 ` Janusz Dziedzic
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