| Message ID | 1512982342-10343-1-git-send-email-loic.poulain@linaro.org |
|---|---|
| State | Accepted |
| Commit | 0856655a25476d4431005e39d606e349050066b0 |
| Headers | show |
| Series | [v2] wcn36xx: Fix dynamic power saving | expand |
On Mon, Dec 11, 2017 at 10:52:22AM +0200, Loic Poulain wrote: > Since driver does not report hardware dynamic power saving cap, > this is up to the mac80211 to manage power saving timeout and > state machine, using the ieee80211 config callback to report > PS changes. This patch enables/disables PS mode according to > the new configuration. > > Remove old behaviour enabling PS mode in a static way, this make > the device unusable when power save is enabled since device is > forced to PS regardless RX/TX traffic. > Hi. I tried to see if this patch solves the ping delay once power save is turned on and it appears it doesn't (log below). I do see some change in the delay though in comparison to testing without the patch. Bjorn, How did you test it ? Thanks, Ramon. root@dragonboard-410c:~# ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1): 56 data bytes 64 bytes from 192.168.0.1: seq=0 ttl=64 time=2.688 ms 64 bytes from 192.168.0.1: seq=1 ttl=64 time=1.593 ms 64 bytes from 192.168.0.1: seq=2 ttl=64 time=1.581 ms 64 bytes from 192.168.0.1: seq=3 ttl=64 time=1.466 ms 64 bytes from 192.168.0.1: seq=4 ttl=64 time=1.625 ms 64 bytes from 192.168.0.1: seq=5 ttl=64 time=1.620 ms 64 bytes from 192.168.0.1: seq=6 ttl=64 time=2.907 ms 64 bytes from 192.168.0.1: seq=7 ttl=64 time=1.426 ms 64 bytes from 192.168.0.1: seq=8 ttl=64 time=1.521 ms 64 bytes from 192.168.0.1: seq=9 ttl=64 time=1.543 ms 64 bytes from 192.168.0.1: seq=10 ttl=64 time=6.804 ms 64 bytes from 192.168.0.1: seq=11 ttl=64 time=1.562 ms 64 bytes from 192.168.0.1: seq=12 ttl=64 time=3.148 ms 64 bytes from 192.168.0.1: seq=13 ttl=64 time=1.568 ms 64 bytes from 192.168.0.1: seq=14 ttl=64 time=1.491 ms 64 bytes from 192.168.0.1: seq=15 ttl=64 time=2.884 ms 64 bytes from 192.168.0.1: seq=16 ttl=64 time=1.669 ms 64 bytes from 192.168.0.1: seq=17 ttl=64 time=1.556 ms 64 bytes from 192.168.0.1: seq=18 ttl=64 time=1.487 ms 64 bytes from 192.168.0.1: seq=19 ttl=64 time=1.377 ms 64 bytes from 192.168.0.1: seq=20 ttl=64 time=1.534 ms ^C --- 192.168.0.1 ping statistics --- 21 packets transmitted, 21 packets received, 0% packet loss round-trip min/avg/max = 1.377/2.050/6.804 ms root@dragonboard-410c:~# iw dev wlan0 set power_save on root@dragonboard-410c:~# ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1): 56 data bytes 64 bytes from 192.168.0.1: seq=0 ttl=64 time=4.849 ms 64 bytes from 192.168.0.1: seq=1 ttl=64 time=11.250 ms 64 bytes from 192.168.0.1: seq=2 ttl=64 time=11.402 ms 64 bytes from 192.168.0.1: seq=3 ttl=64 time=11.732 ms 64 bytes from 192.168.0.1: seq=4 ttl=64 time=10.076 ms 64 bytes from 192.168.0.1: seq=5 ttl=64 time=11.532 ms 64 bytes from 192.168.0.1: seq=6 ttl=64 time=15.479 ms 64 bytes from 192.168.0.1: seq=7 ttl=64 time=11.318 ms 64 bytes from 192.168.0.1: seq=8 ttl=64 time=13.299 ms 64 bytes from 192.168.0.1: seq=9 ttl=64 time=11.068 ms 64 bytes from 192.168.0.1: seq=10 ttl=64 time=11.087 ms 64 bytes from 192.168.0.1: seq=11 ttl=64 time=11.362 ms 64 bytes from 192.168.0.1: seq=12 ttl=64 time=11.341 ms 64 bytes from 192.168.0.1: seq=13 ttl=64 time=15.945 ms 64 bytes from 192.168.0.1: seq=14 ttl=64 time=11.318 ms 64 bytes from 192.168.0.1: seq=15 ttl=64 time=11.343 ms 64 bytes from 192.168.0.1: seq=16 ttl=64 time=11.378 ms 64 bytes from 192.168.0.1: seq=17 ttl=64 time=7.693 ms 64 bytes from 192.168.0.1: seq=18 ttl=64 time=11.703 ms 64 bytes from 192.168.0.1: seq=19 ttl=64 time=11.528 ms 64 bytes from 192.168.0.1: seq=20 ttl=64 time=12.008 ms 64 bytes from 192.168.0.1: seq=21 ttl=64 time=11.522 ms 64 bytes from 192.168.0.1: seq=22 ttl=64 time=12.949 ms 64 bytes from 192.168.0.1: seq=23 ttl=64 time=12.056 ms 64 bytes from 192.168.0.1: seq=24 ttl=64 time=13.097 ms 64 bytes from 192.168.0.1: seq=25 ttl=64 time=11.638 ms ^C --- 192.168.0.1 ping statistics --- > Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> > Signed-off-by: Loic Poulain <loic.poulain@linaro.org> > --- > v2: remove error msg on unbalanced bmps exit > return -EALREADY if not in bmps mode > > drivers/net/wireless/ath/wcn36xx/main.c | 23 ++++++++++++----------- > drivers/net/wireless/ath/wcn36xx/pmc.c | 6 ++++-- > 2 files changed, 16 insertions(+), 13 deletions(-) > > diff --git a/drivers/net/wireless/ath/wcn36xx/main.c > b/drivers/net/wireless/ath/wcn36xx/main.c > index f0b4d43..436b8ea 100644 > --- a/drivers/net/wireless/ath/wcn36xx/main.c > +++ b/drivers/net/wireless/ath/wcn36xx/main.c > @@ -384,6 +384,18 @@ static int wcn36xx_config(struct ieee80211_hw *hw, > u32 changed) > } > } > > + if (changed & IEEE80211_CONF_CHANGE_PS) { > + list_for_each_entry(tmp, &wcn->vif_list, list) { > + vif = wcn36xx_priv_to_vif(tmp); > + if (hw->conf.flags & IEEE80211_CONF_PS) { > + if (vif->bss_conf.ps) /* ps allowed ? */ > + wcn36xx_pmc_enter_bmps_state(wcn, > vif); > + } else { > + wcn36xx_pmc_exit_bmps_state(wcn, vif); > + } > + } > + } > + > mutex_unlock(&wcn->conf_mutex); > > return 0; > @@ -747,17 +759,6 @@ static void wcn36xx_bss_info_changed(struct > ieee80211_hw *hw, > vif_priv->dtim_period = bss_conf->dtim_period; > } > > - if (changed & BSS_CHANGED_PS) { > - wcn36xx_dbg(WCN36XX_DBG_MAC, > - "mac bss PS set %d\n", > - bss_conf->ps); > - if (bss_conf->ps) { > - wcn36xx_pmc_enter_bmps_state(wcn, vif); > - } else { > - wcn36xx_pmc_exit_bmps_state(wcn, vif); > - } > - } > - > if (changed & BSS_CHANGED_BSSID) { > wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed_bssid > %pM\n", > bss_conf->bssid); > diff --git a/drivers/net/wireless/ath/wcn36xx/pmc.c > b/drivers/net/wireless/ath/wcn36xx/pmc.c > index 589fe5f..1976b80 100644 > --- a/drivers/net/wireless/ath/wcn36xx/pmc.c > +++ b/drivers/net/wireless/ath/wcn36xx/pmc.c > @@ -45,8 +45,10 @@ int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn, > struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif); > > if (WCN36XX_BMPS != vif_priv->pw_state) { > - wcn36xx_err("Not in BMPS mode, no need to exit from BMPS > mode!\n"); > - return -EINVAL; > + /* Unbalanced call or last BMPS enter failed */ > + wcn36xx_dbg(WCN36XX_DBG_PMC, > + "Not in BMPS mode, no need to exit\n"); > + return -EALREADY; > } > wcn36xx_smd_exit_bmps(wcn, vif); > vif_priv->pw_state = WCN36XX_FULL_POWER; > -- > 2.7.4 > > > _______________________________________________ > wcn36xx mailing list > wcn36xx@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/wcn36xx -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Ramon, On 11 December 2017 at 16:41, Bjorn Andersson <bjorn.andersson@linaro.org> wrote: > On Mon 11 Dec 07:34 PST 2017, Ramon Fried wrote: > >> On Mon, Dec 11, 2017 at 10:52:22AM +0200, Loic Poulain wrote: >> > Since driver does not report hardware dynamic power saving cap, >> > this is up to the mac80211 to manage power saving timeout and >> > state machine, using the ieee80211 config callback to report >> > PS changes. This patch enables/disables PS mode according to >> > the new configuration. >> > >> > Remove old behaviour enabling PS mode in a static way, this make >> > the device unusable when power save is enabled since device is >> > forced to PS regardless RX/TX traffic. >> > >> >> Hi. >> I tried to see if this patch solves the ping delay once power save is >> turned on and it appears it doesn't (log below). >> I do see some change in the delay though in comparison to testing without the patch. >> Bjorn, How did you test it ? For me this is the expected behavior, when station is in PS mode, some time is required to leave PS, this is the cost for saving power. Since ping is every second, station goes back to PS between each ping due to dynamic PS timeout, this indeed leads to some latency... I obtain same kind of results pinging my mobile phone. Note that the PS timeout can be changed (100ms by default). >> > > Without this patch I get ping times around a second and SSH is not > usable, with this patch I see similar ping times as you, but SSH is > usable. > > I have not been able to run iperf, because I keep hitting > https://bugs.96boards.org/show_bug.cgi?id=663 Yes, improvement can be mainly observed with high traffic. Regards, Loic -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Loic Poulain <loic.poulain@linaro.org> writes: > Since driver does not report hardware dynamic power saving cap, > this is up to the mac80211 to manage power saving timeout and > state machine, using the ieee80211 config callback to report > PS changes. This patch enables/disables PS mode according to > the new configuration. > > Remove old behaviour enabling PS mode in a static way, this make > the device unusable when power save is enabled since device is > forced to PS regardless RX/TX traffic. > > Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> > Signed-off-by: Loic Poulain <loic.poulain@linaro.org> A fixes line would be nice for backporters. I can add that but need the commit id. -- Kalle Valo-- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Kalle Valo <kvalo@qca.qualcomm.com> writes: > Loic Poulain <loic.poulain@linaro.org> writes: > >> Since driver does not report hardware dynamic power saving cap, >> this is up to the mac80211 to manage power saving timeout and >> state machine, using the ieee80211 config callback to report >> PS changes. This patch enables/disables PS mode according to >> the new configuration. >> >> Remove old behaviour enabling PS mode in a static way, this make >> the device unusable when power save is enabled since device is >> forced to PS regardless RX/TX traffic. >> >> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> >> Signed-off-by: Loic Poulain <loic.poulain@linaro.org> > > A fixes line would be nice for backporters. I can add that but need the > commit id. Or maybe this actually isn't a regression? Then of course a fixes line is not needed. Should I push this to v4.15 or v4.16, any preference? -- Kalle Valo-- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Loic Poulain <loic.poulain@linaro.org> wrote: > Since driver does not report hardware dynamic power saving cap, > this is up to the mac80211 to manage power saving timeout and > state machine, using the ieee80211 config callback to report > PS changes. This patch enables/disables PS mode according to > the new configuration. > > Remove old behaviour enabling PS mode in a static way, this make > the device unusable when power save is enabled since device is > forced to PS regardless RX/TX traffic. > > Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> > Signed-off-by: Loic Poulain <loic.poulain@linaro.org> > Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Patch applied to ath-current branch of ath.git, thanks. 0856655a2547 wcn36xx: Fix dynamic power saving -- https://patchwork.kernel.org/patch/10104441/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c index f0b4d43..436b8ea 100644 --- a/drivers/net/wireless/ath/wcn36xx/main.c +++ b/drivers/net/wireless/ath/wcn36xx/main.c @@ -384,6 +384,18 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed) } } + if (changed & IEEE80211_CONF_CHANGE_PS) { + list_for_each_entry(tmp, &wcn->vif_list, list) { + vif = wcn36xx_priv_to_vif(tmp); + if (hw->conf.flags & IEEE80211_CONF_PS) { + if (vif->bss_conf.ps) /* ps allowed ? */ + wcn36xx_pmc_enter_bmps_state(wcn, vif); + } else { + wcn36xx_pmc_exit_bmps_state(wcn, vif); + } + } + } + mutex_unlock(&wcn->conf_mutex); return 0; @@ -747,17 +759,6 @@ static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw, vif_priv->dtim_period = bss_conf->dtim_period; } - if (changed & BSS_CHANGED_PS) { - wcn36xx_dbg(WCN36XX_DBG_MAC, - "mac bss PS set %d\n", - bss_conf->ps); - if (bss_conf->ps) { - wcn36xx_pmc_enter_bmps_state(wcn, vif); - } else { - wcn36xx_pmc_exit_bmps_state(wcn, vif); - } - } - if (changed & BSS_CHANGED_BSSID) { wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed_bssid %pM\n", bss_conf->bssid); diff --git a/drivers/net/wireless/ath/wcn36xx/pmc.c b/drivers/net/wireless/ath/wcn36xx/pmc.c index 589fe5f..1976b80 100644 --- a/drivers/net/wireless/ath/wcn36xx/pmc.c +++ b/drivers/net/wireless/ath/wcn36xx/pmc.c @@ -45,8 +45,10 @@ int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn, struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif); if (WCN36XX_BMPS != vif_priv->pw_state) { - wcn36xx_err("Not in BMPS mode, no need to exit from BMPS mode!\n"); - return -EINVAL; + /* Unbalanced call or last BMPS enter failed */ + wcn36xx_dbg(WCN36XX_DBG_PMC, + "Not in BMPS mode, no need to exit\n"); + return -EALREADY; } wcn36xx_smd_exit_bmps(wcn, vif); vif_priv->pw_state = WCN36XX_FULL_POWER;