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[213.36.7.13]) by smtp.gmail.com with ESMTPSA id g15-20020a05600c4ecf00b00414659ba8c2sm4800181wmq.37.2024.04.12.00.38.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 12 Apr 2024 00:38:51 -0700 (PDT) Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Fri, 12 Apr 2024 09:38:50 +0200 Message-Id: To: "Vasanthakumar Thiagarajan" , , "Jeff Johnson" , "Ben Greear" , "Johannes Berg" , "Karthikeyan Periyasamy" , Cc: Subject: Re: [PATCH 01/13] wifi: cfg80211: Add provision to advertise multiple radio in one wiphy From: "Nicolas Escande" X-Mailer: aerc 0.17.0 References: <20240328072916.1164195-1-quic_periyasa@quicinc.com> <20240328072916.1164195-2-quic_periyasa@quicinc.com> <033185b0-f878-a50b-d0d9-57fa79439bdf@quicinc.com> <80fe5786-f764-455d-ac44-22adf7aeaf94@candelatech.com> <31f30c0e318904f3a082c7f213576ceb1f407141.camel@sipsolutions.net> <20b56e52-a5e2-70cd-a62a-8c4a3526c2cf@candelatech.com> <614bb8a8f1d9174ad7d87cf7636f657cda7b1ef9.camel@sipsolutions.net> <0cfe990b-182b-4ceb-b5b4-2989fefedb2f@quicinc.com> <29f7ecb6d7c208c3614f37616943d5f97bb134d3.camel@freebox.fr> <5fc2f2d2-7403-79d2-8909-ddda918ff8d5@quicinc.com> <6ff353e2-785a-f2ce-8d3b-acc8e79a64cf@quicinc.com> In-Reply-To: <6ff353e2-785a-f2ce-8d3b-acc8e79a64cf@quicinc.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240412_003903_379475_C443C357 X-CRM114-Status: GOOD ( 20.82 ) X-BeenThere: ath12k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "ath12k" Errors-To: ath12k-bounces+ath12k=archiver.kernel.org@lists.infradead.org On Fri Apr 12, 2024 at 5:50 AM CEST, Vasanthakumar Thiagarajan wrote: > > > On 4/11/2024 10:09 PM, Maxime Bizon wrote: > >=20 > > On Thu, 2024-04-11 at 21:56 +0530, Vasanthakumar Thiagarajan wrote: > >=20 > > Hello, > >=20 > > Thanks for making it clear, > >=20 > >=20 > >>> For example, starting a 5Ghz AP in ax-only mode, and at the same > >>> time > >>> creating a STA interface on 2.4GHz ? > >=20 > >> Yes, such use cases continue to be supported in single wiphy mode. > >=20 > > Understood, but I see some corner cases. > >=20 > >=20 > > For example, assume two bands AP hardware, 2.4GHz and 5GHz. > >=20 > > Previously: > > - phy0 is 2.4Ghz > > - phy1 is 5Ghz > > - iw phy phy0 interface create wlan0 type managed > > - iw dev wlan0 scan > >=20 > > =3D> will only scan 2.4Ghz > >=20 > >=20 > > With single phy approach: > > - phy0 is 2.4Ghz + 5Ghz concurrent > > - # iw phy phy0 interface create wlan0 type managed > > - # iw dev wlan0 scan > >=20 > > =3D> will scan both bands ? > >=20 > > Yes, both the bands will be scanned if freq list is not given > > > - > > - # iw phy phy0 interface create wlan1 type __ap > > - # hostapd -i wlan1 > > - # iw dev wlan0 scan > >=20 > > =3D> what will happen then ? > > > > Scan will be carried out on all the radios including the one on which AP = interface is=20 > running. Scan with freq list can be used not to disturb the radio of AP i= nterface. > > > > Same goes for hostapd ACS, I assume specifying freqlist becomes > > mandatory or we can't predict which band the AP will be on ? > >=20 > > If no freq list is given, ACS will run through all the bands and select a= channel from any=20 > of the bands. But this can be optimized to do ACS and channels selection = on a particular=20 > band using channellist/freqlist hostapd configurations. Hello, And in a (very unlikely) case that there are two underlying radios that can operate on the same frequencies, how would freqlist enable us to really sel= ect the underlying radio ? =20 Thanks > > Vasanth