From: Daniel Smith <viscous.liquid@gmail.com>
To: 李刚 <gang.li@watchdata.com>
Cc: linux-wireless@vger.kernel.org,
Ath9k Devel List <ath9k-devel@lists.ath9k.org>
Subject: Re: Question about IEEE80211_TX_CTL_NO_ACK in ath_9k
Date: Mon, 19 Dec 2011 08:43:17 -0500 [thread overview]
Message-ID: <CADGLRPmkbTp-azGJ2=CJum=Y8Mrf7fTbaE9Oi8Om+DQyu7d9uA@mail.gmail.com> (raw)
In-Reply-To: <20111219125052.3B5A42005C@mail.watchdata.com.cn>
2011/12/19 李刚 <gang.li@watchdata.com>:
>
> Hi, Daniel, Thanks you !
>
> Sorry, I didn't make it clear! My 9280 is an USB card, so the related code
> is htc_drv_*.c.
No worries, I just was not aware of any USB devices with the 9280 in
it and the ath9k_htc "supported chips" are the 9271 and 7010.
> I have seen these codes in tx.c, and at first I thought it should work, but
> does not.
So will assume you dealt with this then.
I have not done a lot of delving into the ath9k_htc code myself and I
am not familiar with interfacing with the chips via USB. Normally with
a 9280 where the tx ctrl descriptors are DMA'ed in I just need to make
sure that bit 24 of the third tx ctrl descriptor is set to 1. I did a
cursory look at how a frame is handed from kernel down to hardware and
the hardware control is done through flags set on a struct
tx_frame_hdr. I looked at the flags defined for ath9k_htc and I see no
sign of a flag to control ACK's. So I think this has to be punted to
one of the Atheros guys or someone with the spec sheets that can say
if there is a bit in the flags field to turn off ACK.
Sorry I couldn't be much more help.
Daniel
WARNING: multiple messages have this Message-ID (diff)
From: Daniel Smith <viscous.liquid@gmail.com>
To: ath9k-devel@lists.ath9k.org
Subject: [ath9k-devel] Question about IEEE80211_TX_CTL_NO_ACK in ath_9k
Date: Mon, 19 Dec 2011 08:43:17 -0500 [thread overview]
Message-ID: <CADGLRPmkbTp-azGJ2=CJum=Y8Mrf7fTbaE9Oi8Om+DQyu7d9uA@mail.gmail.com> (raw)
In-Reply-To: <20111219125052.3B5A42005C@mail.watchdata.com.cn>
2011/12/19 ?? <gang.li@watchdata.com>:
>
> Hi, Daniel, Thanks you !
>
> Sorry, I didn't make it clear! My 9280 is an USB card, so the related code
> is htc_drv_*.c.
No worries, I just was not aware of any USB devices with the 9280 in
it and the ath9k_htc "supported chips" are the 9271 and 7010.
> I have seen these codes in tx.c, and at first I thought it should work, but
> does not.
So will assume you dealt with this then.
I have not done a lot of delving into the ath9k_htc code myself and I
am not familiar with interfacing with the chips via USB. Normally with
a 9280 where the tx ctrl descriptors are DMA'ed in I just need to make
sure that bit 24 of the third tx ctrl descriptor is set to 1. I did a
cursory look at how a frame is handed from kernel down to hardware and
the hardware control is done through flags set on a struct
tx_frame_hdr. I looked at the flags defined for ath9k_htc and I see no
sign of a flag to control ACK's. So I think this has to be punted to
one of the Atheros guys or someone with the spec sheets that can say
if there is a bit in the flags field to turn off ACK.
Sorry I couldn't be much more help.
Daniel
next prev parent reply other threads:[~2011-12-19 13:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-17 23:18 Question about TCP Checksum errors Larry Finger
2011-12-17 23:43 ` Eric Dumazet
2011-12-19 11:38 ` Question about IEEE80211_TX_CTL_NO_ACK in ath_9k 李刚
2011-12-19 12:33 ` Mohammed Shafi
2011-12-19 13:03 ` 李刚
2011-12-19 12:33 ` Daniel Smith
2011-12-19 13:00 ` 李刚
2011-12-19 13:43 ` Daniel Smith [this message]
2011-12-19 13:43 ` [ath9k-devel] " Daniel Smith
2011-12-30 8:15 ` Question: ieee80211_rx called twice after one ieee80211_subif_start_xmit call 李刚
2011-12-30 8:15 ` [ath9k-devel] " 李刚
2011-12-30 9:30 ` Adrian Chadd
2011-12-30 9:30 ` [ath9k-devel] " Adrian Chadd
2011-12-30 11:13 ` [ath9k-devel] 答复: " 李刚
2012-01-07 2:11 ` Question about duration of data frame in ath9k_htc 李刚
2012-01-07 2:11 ` [ath9k-devel] " 李刚
2012-01-07 5:31 ` Sujith Manoharan
2012-01-07 5:31 ` [ath9k-devel] " Sujith Manoharan
2011-12-19 13:07 ` Question about IEEE80211_TX_CTL_NO_ACK in ath_9k Helmut Schaa
2011-12-19 14:42 ` Sujith
2011-12-20 5:39 ` 李刚
2011-12-20 15:24 ` Sujith
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