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r196sm10935189wmf.22.2019.04.12.04.13.53 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 12 Apr 2019 04:13:56 -0700 (PDT) Date: Fri, 12 Apr 2019 14:13:52 +0300 From: "Leonidas P. Papadakos" Subject: RE: [PATCH 1/2] stmmac: introduce flag to dynamically disable TX offload for rockchip devices To: Jose Abreu Cc: Robin Murphy , Philipp Tomsich , Heiko =?iso-8859-1?q?St=FCbner?= , Christoph =?iso-8859-1?q?M=FCllner?= , Maxime Coquelin , Alexandre Torgue , netdev@vger.kernel.org, LKML , Linux ARM , Klaus Goger Message-Id: <1555067632.1216.0@gmail.com> In-Reply-To: <78EB27739596EE489E55E81C33FEC33A0B4566A9@DE02WEMBXB.internal.synopsys.com> References: <20190401181840.31255-1-papadakospan@gmail.com> <9d65a22a-2288-dc53-0059-ec4a31424dd8@arm.com> <2312344.mOsv7YkeBG@diego> <9EC67532-2D43-4AAD-BFA7-8B6797067427@theobroma-systems.com> <78EB27739596EE489E55E81C33FEC33A0B421348@de02wembxa.internal.synopsys.com> <4a9839d6-3d90-4354-7b64-78d5c1126e99@arm.com> <78EB27739596EE489E55E81C33FEC33A0B423811@de02wembxa.internal.synopsys.com> <1554245296.1271.0@gmail.com> <78EB27739596EE489E55E81C33FEC33A0B4254A0@de02wembxa.internal.synopsys.com> <1554305721.1328.0@gmail.com> <1554306954.1328.1@gmail.com> <78EB27739596EE489E55E81C33FEC33A0B44985F@DE02WEMBXB.internal.synopsys.com> <1554488052.1193.1@gmail.com> <85c1d945-d49b-3350-6ff4-a058c5a8c1d7@arm.com> <1554489537.1199.0@gmail.com> <1555016970.28872.0@gmail.com> <78EB27739596EE489E55E81C33FEC33A0B4566A9@DE02WEMBXB.internal.synopsys.com> X-Mailer: geary/3.32.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Can you please share the stacktrace here ? I can't access pastebin=20 > due to > corporate policy. This happens seconds after I change the MTU. I remember it used to=20 happen with 1500 as well, before the gmac tweaks. It makes sense [ 111.111639] NETDEV WATCHDOG: eth0 (rk_gmac-dwmac): transmit queue 0=20 timed out [ 111.112374] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:461=20 dev_watchdog+0x2b8/0x2c0 [ 111.113112] Modules linked in: lz4 lz4_compress zram rockchipdrm=20 realtek analogix_dp dw_mipi_dsi dw_hdmi cec rc_core dwmac_rk=20 stmmac_platform drm_kms_helper stmmac rtc_rk808 drm rockchip_thermal=20 drm_panel_orientation_quirks dw_wdt syscopyarea sysfillrect sysimgblt=20 fb_sys_fops ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt ipt_REJECT=20 xt_recent xt_multiport xt_comment xt_limit xt_addrtype xt_conntrack=20 ip6table_filter ip6_tables nf_conntrack_netbios_ns=20 nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack=20 nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bpfilter tcp_bbr tcp_lp=20 nfsd [ 111.117725] CPU: 0 PID: 0 Comm: swapper/0 Not tainted=20 5.1.0-rc4-1-ARCH #1 [ 111.118326] Hardware name: Firefly roc-rk3328-cc (DT) [ 111.118778] pstate: 20000005 (nzCv daif -PAN -UAO) [ 111.119204] pc : dev_watchdog+0x2b8/0x2c0 [ 111.119568] lr : dev_watchdog+0x2b8/0x2c0 [ 111.119928] sp : ffff000010003d50 [ 111.120223] x29: ffff000010003d50 x28: ffff00001166a000 [ 111.120695] x27: 0000000000000140 x26: 00000000ffffffff [ 111.121166] x25: 0000000000000000 x24: 0000000000000000 [ 111.121635] x23: ffff8000383c4480 x22: 0000000000000001 [ 111.122104] x21: ffff000011687000 x20: ffff8000383c4000 [ 111.122579] x19: 0000000000000000 x18: 0000000000000010 [ 111.123052] x17: 0000000000000000 x16: 0000000000000000 [ 111.123520] x15: ffffffffffffffff x14: ffff00001168d6c8 [ 111.123995] x13: ffff000090003a67 x12: ffff000010003a6f [ 111.124470] x11: ffff0000116b7000 x10: ffff0000100039f0 [ 111.124938] x9 : 00000000ffffffd0 x8 : ffff0000108395d0 [ 111.125411] x7 : 0000000000000179 x6 : 0000000000000001 [ 111.125885] x5 : 0000000000000000 x4 : 0000000000000001 [ 111.126359] x3 : 0000000000000000 x2 : ffff00001168ea58 [ 111.126828] x1 : 576938cacdaf1700 x0 : 0000000000000000 [ 111.127309] Call trace: [ 111.127533] dev_watchdog+0x2b8/0x2c0 [ 111.127864] call_timer_fn+0x34/0x170 [ 111.128195] expire_timers.part.5+0xc8/0x158 [ 111.128578] run_timer_softirq+0xd4/0x218 [ 111.128940] __do_softirq+0x130/0x330 [ 111.129273] irq_exit+0xc0/0xd0 [ 111.129560] __handle_domain_irq+0x70/0xc0 [ 111.129924] gic_handle_irq+0x58/0xa8 [ 111.130255] el1_irq+0xb8/0x140 [ 111.130542] arch_cpu_idle+0x3c/0x1c8 [ 111.130874] default_idle_call+0x38/0x40 [ 111.131226] do_idle+0x23c/0x2b8 [ 111.131513] cpu_startup_entry+0x2c/0x30 [ 111.131868] rest_init+0xb8/0xc4 [ 111.132161] arch_call_rest_init+0x14/0x1c [ 111.132529] start_kernel+0x484/0x4b0 [ 111.132862] ---[ end trace 7efe323f823d5938 ]--- [ 111.133352] rk_gmac-dwmac ff540000.ethernet eth0: Reset adapter. [ 111.134637] rk_gmac-dwmac ff540000.ethernet eth0: Link is Down [ 111.138412] RTL8211E Gigabit Ethernet stmmac-0:00: attached PHY=20 driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=3Dstmmac-0:00,=20 irq=3DPOLL) [ 111.151252] rk_gmac-dwmac ff540000.ethernet eth0: No Safety Features=20 support found [ 111.151962] rk_gmac-dwmac ff540000.ethernet eth0: PTP not supported=20 by HW [ 115.352150] rk_gmac-dwmac ff540000.ethernet eth0: Link is Up -=20 1Gbps/Full - flow control rx/tx [ 115.352965] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready I also have another one that happened while wireguard was loaded: I brought down eth0. changed the mtu, and brought ot up again. =CE=91=CF=80=CF=81 11 16:06:11.411210 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Down =CE=91=CF=80=CF=81 11 16:06:38.621145 renegade kernel: RTL8211E Gigabit Eth= ernet=20 stmmac-0:00: attached PHY driver [RTL8211E Gigabit Ethernet]=20 (mii_bus:phy_addr=3Dstmmac-0:00, irq=3DPOLL) =CE=91=CF=80=CF=81 11 16:06:38.641228 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: No Safety Features support found =CE=91=CF=80=CF=81 11 16:06:38.642602 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: PTP not supported by HW =CE=91=CF=80=CF=81 11 16:06:45.901192 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx =CE=91=CF=80=CF=81 11 16:06:45.902237 renegade kernel: IPv6:=20 ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready =CE=91=CF=80=CF=81 11 16:08:41.781166 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Down =CE=91=CF=80=CF=81 11 16:08:54.791163 renegade kernel: RTL8211E Gigabit Eth= ernet=20 stmmac-0:00: attached PHY driver [RTL8211E Gigabit Ethernet]=20 (mii_bus:phy_addr=3Dstmmac-0:00, irq=3DPOLL) =CE=91=CF=80=CF=81 11 16:08:54.801388 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: No Safety Features support found =CE=91=CF=80=CF=81 11 16:08:54.802780 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: PTP not supported by HW =CE=91=CF=80=CF=81 11 16:09:02.061182 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx =CE=91=CF=80=CF=81 11 16:09:02.062327 renegade kernel: IPv6:=20 ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready =CE=91=CF=80=CF=81 11 16:09:03.214823 renegade kernel: ------------[ cut he= re=20 ]------------ =CE=91=CF=80=CF=81 11 16:09:03.215300 renegade kernel: refcount_t: underflo= w;=20 use-after-free. =CE=91=CF=80=CF=81 11 16:09:03.215472 renegade kernel: WARNING: CPU: 2 PID:= 0 at=20 lib/refcount.c:190 refcount_sub_and_test_checked+0xc8/0xd8 =CE=91=CF=80=CF=81 11 16:03:25.240754 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet: TX Checksum insertion supported =CE=91=CF=80=CF=81 11 16:03:25.242650 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet: Wake-Up On Lan supported =CE=91=CF=80=CF=81 11 16:03:25.244155 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet: Normal descriptors =CE=91=CF=80=CF=81 11 16:03:25.247336 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet: Ring mode enabled =CE=91=CF=80=CF=81 11 16:03:25.248837 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet: Enable RX Mitigation via HW Watchdog Timer =CE=91=CF=80=CF=81 11 16:03:25.351198 renegade kernel: rockchip-drm=20 display-subsystem: [drm:rockchip_drm_platform_probe [rockchipdrm]]=20 *ERROR* No available vop found for display-subsy> =CE=91=CF=80=CF=81 11 16:03:25.391228 renegade kernel: libphy: stmmac: prob= ed =CE=91=CF=80=CF=81 11 16:03:25.391708 renegade kernel: RTL8211E Gigabit Eth= ernet=20 stmmac-0:00: attached PHY driver [RTL8211E Gigabit Ethernet]=20 (mii_bus:phy_addr=3Dstmmac-0:00, irq=3DPOLL) =CE=91=CF=80=CF=81 11 16:03:25.393255 renegade kernel: RTL8211E Gigabit Eth= ernet=20 stmmac-0:01: attached PHY driver [RTL8211E Gigabit Ethernet]=20 (mii_bus:phy_addr=3Dstmmac-0:01, irq=3DPOLL) =CE=91=CF=80=CF=81 11 16:03:25.541243 renegade kernel: RTL8211E Gigabit Eth= ernet=20 stmmac-0:00: attached PHY driver [RTL8211E Gigabit Ethernet]=20 (mii_bus:phy_addr=3Dstmmac-0:00, irq=3DPOLL) =CE=91=CF=80=CF=81 11 16:03:25.561202 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: No Safety Features support found =CE=91=CF=80=CF=81 11 16:03:25.562458 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: PTP not supported by HW =CE=91=CF=80=CF=81 11 16:03:25.563674 renegade kernel: A link change reques= t failed=20 with some changes committed already. Interface eth0 may have been left=20 with an inconsistent configu> =CE=91=CF=80=CF=81 11 16:03:26.841235 renegade kernel: zram: Added device: = zram0 =CE=91=CF=80=CF=81 11 16:03:26.941263 renegade kernel: random: crng init do= ne =CE=91=CF=80=CF=81 11 16:03:26.941801 renegade kernel: random: 7 urandom wa= rning(s)=20 missed due to ratelimiting =CE=91=CF=80=CF=81 11 16:03:27.571191 renegade kernel: phy=20 phy-ff450000.syscon:usb2-phy@100.0: charger =3D USB_DCP_CHARGER =CE=91=CF=80=CF=81 11 16:03:27.921230 renegade kernel: zram0: detected capa= city=20 change from 0 to 1025568768 =CE=91=CF=80=CF=81 11 16:03:28.813838 renegade kernel: Adding 1001528k swap= on=20 /dev/zram0. Priority:32767 extents:1 across:1001528k SSDscFS =CE=91=CF=80=CF=81 11 16:03:32.861210 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx =CE=91=CF=80=CF=81 11 16:03:32.862527 renegade kernel: IPv6:=20 ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready =CE=91=CF=80=CF=81 11 16:05:25.932408 renegade kernel: wireguard: loading=20 out-of-tree module taints kernel. =CE=91=CF=80=CF=81 11 16:05:25.936144 renegade kernel: wireguard: WireGuard= =20 0.0.20190406 loaded. See www.wireguard.com for information. =CE=91=CF=80=CF=81 11 16:05:25.936467 renegade kernel: wireguard: Copyright= (C)=20 2015-2019 Jason A. Donenfeld . All Rights Reserved. =CE=91=CF=80=CF=81 11 16:05:26.451886 renegade kernel: NFSD: starting 90-se= cond=20 grace period (net f0000041) =CE=91=CF=80=CF=81 11 16:05:27.252030 renegade kernel: nf_conntrack: defaul= t=20 automatic helper assignment has been turned off for security reasons=20 and CT-based firewall rule not found> =CE=91=CF=80=CF=81 11 16:06:11.411210 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Down =CE=91=CF=80=CF=81 11 16:06:38.621145 renegade kernel: RTL8211E Gigabit Eth= ernet=20 stmmac-0:00: attached PHY driver [RTL8211E Gigabit Ethernet]=20 (mii_bus:phy_addr=3Dstmmac-0:00, irq=3DPOLL) =CE=91=CF=80=CF=81 11 16:06:38.641228 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: No Safety Features support found =CE=91=CF=80=CF=81 11 16:06:38.642602 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: PTP not supported by HW =CE=91=CF=80=CF=81 11 16:06:45.901192 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx =CE=91=CF=80=CF=81 11 16:06:45.902237 renegade kernel: IPv6:=20 ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready =CE=91=CF=80=CF=81 11 16:08:41.781166 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Down =CE=91=CF=80=CF=81 11 16:08:54.791163 renegade kernel: RTL8211E Gigabit Eth= ernet=20 stmmac-0:00: attached PHY driver [RTL8211E Gigabit Ethernet]=20 (mii_bus:phy_addr=3Dstmmac-0:00, irq=3DPOLL) =CE=91=CF=80=CF=81 11 16:08:54.801388 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: No Safety Features support found =CE=91=CF=80=CF=81 11 16:08:54.802780 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: PTP not supported by HW =CE=91=CF=80=CF=81 11 16:09:02.061182 renegade kernel: rk_gmac-dwmac=20 ff540000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx =CE=91=CF=80=CF=81 11 16:09:02.062327 renegade kernel: IPv6:=20 ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready =CE=91=CF=80=CF=81 11 16:09:03.214823 renegade kernel: ------------[ cut he= re=20 ]------------ =CE=91=CF=80=CF=81 11 16:09:03.215300 renegade kernel: refcount_t: underflo= w;=20 use-after-free. =CE=91=CF=80=CF=81 11 16:09:03.215472 renegade kernel: WARNING: CPU: 2 PID:= 0 at=20 lib/refcount.c:190 refcount_sub_and_test_checked+0xc8/0xd8 =CE=91=CF=80=CF=81 11 16:09:03.215603 renegade kernel: Modules linked in:=20 iptable_nat ipt_MASQUERADE wireguard(O) ip6_udp_tunnel udp_tunnel lz4=20 lz4_compress zram realtek rockchipdrm a> =CE=91=CF=80=CF=81 11 16:09:03.215845 renegade kernel: CPU: 2 PID: 0 Comm:=20 swapper/2 Tainted: G O 5.1.0-rc4-1-ARCH #1 =CE=91=CF=80=CF=81 11 16:09:03.215959 renegade kernel: Hardware name: Firef= ly=20 roc-rk3328-cc (DT) =CE=91=CF=80=CF=81 11 16:09:03.216060 renegade kernel: pstate: 80000005 (Nz= cv daif=20 -PAN -UAO) =CE=91=CF=80=CF=81 11 16:09:03.216160 renegade kernel: pc :=20 refcount_sub_and_test_checked+0xc8/0xd8 =CE=91=CF=80=CF=81 11 16:09:03.216256 renegade kernel: lr :=20 refcount_sub_and_test_checked+0xc8/0xd8 =CE=91=CF=80=CF=81 11 16:09:03.216344 renegade kernel: sp : ffff000010013ca= 0 =CE=91=CF=80=CF=81 11 16:09:03.216434 renegade kernel: x29: ffff000010013ca= 0 x28:=20 ffff80003406c8c0 =CE=91=CF=80=CF=81 11 16:09:03.216550 renegade kernel: x27: ffff80002792d10= 0 x26:=20 ffff80003406c8c0 =CE=91=CF=80=CF=81 11 16:09:03.216648 renegade kernel: x25: 000000000000006= 0 x24:=20 0000000000000000 =CE=91=CF=80=CF=81 11 16:09:03.216734 renegade kernel: x23: 000000000000014= b x22:=20 0000000000000001 =CE=91=CF=80=CF=81 11 16:09:03.216826 renegade kernel: x21: 000000000000000= 4 x20:=20 0000000000000000 =CE=91=CF=80=CF=81 11 16:09:03.216922 renegade kernel: x19: ffff80002792d10= 0 x18:=20 0000000000000010 =CE=91=CF=80=CF=81 11 16:09:03.217014 renegade kernel: x17: 000000000000000= 0 x16:=20 0000000000000000 =CE=91=CF=80=CF=81 11 16:09:03.217109 renegade kernel: x15: fffffffffffffff= f x14:=20 0720072007200720 =CE=91=CF=80=CF=81 11 16:09:03.217197 renegade kernel: x13: 072007200720072= 0 x12:=20 0720072007200720 =CE=91=CF=80=CF=81 11 16:09:03.217283 renegade kernel: x11: 072007200720072= 0 x10:=20 0720072007200720 =CE=91=CF=80=CF=81 11 16:09:03.217427 renegade kernel: x9 : 072007200720072= 0 x8 :=20 072007200720072e =CE=91=CF=80=CF=81 11 16:09:03.217537 renegade kernel: x7 : 000000000000018= 4 x6 :=20 0000000000000001 =CE=91=CF=80=CF=81 11 16:09:03.217637 renegade kernel: x5 : 000000000000000= 0 x4 :=20 0000000000000001 =CE=91=CF=80=CF=81 11 16:09:03.217740 renegade kernel: x3 : 000000000000000= 7 x2 :=20 0000000000000007 =CE=91=CF=80=CF=81 11 16:09:03.217833 renegade kernel: x1 : 576938cacdaf170= 0 x0 :=20 0000000000000000 =CE=91=CF=80=CF=81 11 16:09:03.217928 renegade kernel: Call trace: =CE=91=CF=80=CF=81 11 16:09:03.218016 renegade kernel: =20 refcount_sub_and_test_checked+0xc8/0xd8 > If it's a queue timeout then please share your "dmesg | grep -i=20 > stmmac" > since boot. The only time I see it mentioned is basically when the link is brought=20 up $ dmesg | grep -i stmmac [ +0,134955] libphy: stmmac: probed [ +0,000352] RTL8211E Gigabit Ethernet stmmac-0:00: attached PHY=20 driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=3Dstmmac-0:00,=20 irq=3DPOLL) [ +0,001253] RTL8211E Gigabit Ethernet stmmac-0:01: attached PHY=20 driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=3Dstmmac-0:01,=20 irq=3DPOLL) [ +0,256702] RTL8211E Gigabit Ethernet stmmac-0:00: attached PHY=20 driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=3Dstmmac-0:00,=20 irq=3DPOLL) > This is not a workaround neither an issue. It's well stablished that=20 > PBL > setting interferes with COE so one must choose a setting that depends=20 > on > FIFO size. I would like to make it automatic in the driver but I=20 > didn't > have the time to submit a patch yet, sorry. >=20 > Thanks, > Jose Miguel Abreu When you say FIFO size, is that related to the tx/rx_delay? =