From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail2.candelatech.com ([208.74.158.173] helo=mail3.candelatech.com) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iAZXp-0004bw-D8 for ath10k@lists.infradead.org; Wed, 18 Sep 2019 12:58:55 +0000 Subject: Re: [PATCH] cfg80211: Add cumulative channel survey dump support. References: <1526980556-26707-1-git-send-email-vnaralas@codeaurora.org> <2083094.mFhUXK7yzB@bentobox> <18458963.ukFM9YuvQx@bentobox> From: Ben Greear Message-ID: Date: Wed, 18 Sep 2019 05:58:46 -0700 MIME-Version: 1.0 In-Reply-To: <18458963.ukFM9YuvQx@bentobox> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: Sven Eckelmann , ath10k@lists.infradead.org, sw@simonwunderlich.de Cc: vnaralas@codeaurora.org, linux-wireless@vger.kernel.org, Johannes Berg , slakkavalli@datto.com On 09/18/2019 01:46 AM, Sven Eckelmann wrote: > On Tuesday, 17 September 2019 19:27:50 CEST Sven Eckelmann wrote: > [...] >> So whatever the firmware does when it gets a >> WMI_BSS_SURVEY_REQ_TYPE_READ_CLEAR - it is not a CLEAR after read. And they >> also don't simply wrap around but there all values have to get some kind of >> "fix" like the active time one shown in ath10k_hw_fill_survey_time. >> Just that the actual "fixes" for them are unknown. To me it looks like >> firmware ATH10K_HW_CC_WRAP_SHIFTED_ALL have busy and rx interlinked with >> the overflow of total. But the tx and rx_bss are actually cleared. >> >> Other than that, the counters are wrapping every ~14-30 seconds. So we >> also need also some worker for ath10k which every couple of seconds >> requests new values for all the channel from the firmware. Which already >> sounds problematic because I get >> "ath10k_pci 0000:00:00.0: bss channelsurvey timed out" all the time >> when requesting surveys manually. > > I've just tested it on 10.4 (wave-2) cards and it seems like it is cleared as > expected on them. So the change I posted earlier (with a minor fix for > ath10k_hw_fill_survey_time) returns now useful (accumulated) values. This can > be seen in > https://stats.freifunk-vogtland.net/d/ffv_node/nodeinfo?orgId=1&var-node=ac86749f4d60&fullscreen&panelId=5&from=1568782046974&to=1568807068706 > (after the reboot at 10:15 UTC+2) > > So as Ben Greear said, the 10.4 firmware version is fixed and 10.2.* (for > the wave-1 cards) is still broken and we need a QCA firmware engineer to > fix it. Or to work around it by polling every couple of seconds and > manually do the cleanup of the values from the firmware. Have you tried probing very fast, like every 100ms, to see if returned values look sane? I seem to recall that there was some firmware issue with this, like it only updates internal counters every second or so. Polling slow would have the same off-by-a-second's-worth-of-data, but you would not easily notice it at slower polling intervals. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k