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[149.6.153.186]) by smtp.gmail.com with ESMTPSA id 204sm7681684wmc.1.2019.04.11.03.26.34 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 11 Apr 2019 03:26:34 -0700 (PDT) From: Matteo Croce To: netdev@vger.kernel.org Subject: [PATCH v3 0/2] Fix thunderx MTU with XDP Date: Thu, 11 Apr 2019 12:26:31 +0200 Message-Id: <20190411102633.3685-1-mcroce@redhat.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190411_032638_068206_1E15FD34 X-CRM114-Status: UNSURE ( 7.94 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Robert Richter , Ilias Apalodimas , Jesper Dangaard Brouer , Sunil Goutham , David Miller , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The thunderx driver can't use XDP with all MTU values. This patches sets the right MTU values, and add a check to avoid setting a wrong value which will not function. v3: Fix a copy-paste from two functions, tested on proper hardware: # ip link show dev enP2p1s0v0 2: enP2p1s0v0: mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 1c:1b:0d:0d:52:a4 brd ff:ff:ff:ff:ff:ff # ip link set enP2p1s0v0 mtu 1800 # ip link set dev enP2p1s0v0 xdpdrv object mtu.o [ 787.019730] nicvf 0002:01:00.1 enP2p1s0v0: Jumbo frames not yet supported with XDP, current MTU 1800. RTNETLINK answers: Operation not supported # ip link set enP2p1s0v0 mtu 1500 # ip link set dev enP2p1s0v0 xdpdrv object mtu.o [ 800.574568] nicvf 0002:01:00.1 enP2p1s0v0: Link is Up 10000 Mbps Full duplex # ip link set enP2p1s0v0 mtu 1600 [ 807.248321] nicvf 0002:01:00.1 enP2p1s0v0: Jumbo frames not yet supported with XDP, current MTU 1500. RTNETLINK answers: Invalid argument Matteo Croce (2): net: thunderx: raise XDP MTU to 1508 net: thunderx: don't allow jumbo frames with XDP .../net/ethernet/cavium/thunder/nicvf_main.c | 22 +++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel