On Thu, Aug 10, 2023 at 10:13 PM Andrew Halaney <ahalaney@xxxxxxxxxx> wrote: > > On Thu, Aug 10, 2023 at 10:09:00AM +0200, Bartosz Golaszewski wrote: > > From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx> > > > > This series contains changes required to enable EMAC1 on sa8775p-ride. > > This iteration no longer depends on any changes to the stmmac driver to > > be functional. It turns out I was mistaken in thinking that the two > > MACs' MDIO masters share the MDIO clock and data lines. In reality, only > > one MAC is connected to an MDIO bus and it controlls PHYs for both MAC0 > > and MAC1. The MDIO master on MAC1 is not connected to anything. > > > > I've taken this for a quick (disconnected from network) spin, and things > work as expected without having anything plugged in. > > I'm trying to get someone to plug it in so I can test that networking > actually works, but the interesting bit is the phy/mdio bit here, and > that's at least working ok I can tell. The rest is boilerplate similar > to the other MAC instance which works fine. > > Removing the driver results in the following oops, but that's already > discussed[0] and is independent of the devicetree description: > > I'd add a test tag but I want to wait for some network traffic tests > before I do such. I wouldn't wait on picking it up just because of > that though. > > [0] https://lore.kernel.org/netdev/ZNKLjuxnR2+V3g1D@xxxxxxxxxxxxxxxxxxxxx/ > > [root@dhcp19-243-28 ~]# modprobe -r dwmac_qcom_ethqos > [ 1260.620402] qcom-ethqos 23040000.ethernet eth1: stmmac_dvr_remove: removing driver > [ 1260.655724] qcom-ethqos 23040000.ethernet eth1: FPE workqueue stop > [ 1261.034265] qcom-ethqos 23000000.ethernet eth0: stmmac_dvr_remove: removing driver > [ 1261.042108] Unable to handle kernel paging request at virtual address dead000000000122 > [ 1261.050379] Mem abort info: > [ 1261.053251] ESR = 0x0000000096000044 > [ 1261.057113] EC = 0x25: DABT (current EL), IL = 32 bits > [ 1261.062573] SET = 0, FnV = 0 > [ 1261.065712] EA = 0, S1PTW = 0 > [ 1261.068946] FSC = 0x04: level 0 translation fault > [ 1261.073956] Data abort info: > [ 1261.076916] ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000 > [ 1261.082552] CM = 0, WnR = 1, TnD = 0, TagAccess = 0 > [ 1261.087882] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 > [ 1261.093338] [dead000000000122] address between user and kernel address ranges > [ 1261.100667] Internal error: Oops: 0000000096000044 [#1] PREEMPT SMP > [ 1261.107096] Modules linked in: r8152 rfkill marvell dwmac_qcom_ethqos(-) qcom_pon stmmac_platform crct10dif_ce stmmac spi_geni_qcom i2c_qcom_geni phy_qcom_qmp_usb phy_qcom_sgmii_eth phy_qcom_snps_femto_v2 pcs_xpcs qcom_wdt socinfo phy_qcom_qmp_pcie fuse ufs_qcom phy_qcom_qmp_ufs > [ 1261.132407] CPU: 2 PID: 610 Comm: modprobe Not tainted 6.5.0-rc4-next-20230731-00008-g18ccccee8230 #7 > [ 1261.141860] Hardware name: Qualcomm SA8775P Ride (DT) > [ 1261.147042] pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > [ 1261.154185] pc : device_link_put_kref+0x44/0x110 > [ 1261.158926] lr : device_link_put_kref+0xf4/0x110 > [ 1261.163662] sp : ffff800082a938e0 > [ 1261.167066] x29: ffff800082a938e0 x28: ffff6ec68bdc9d80 x27: 0000000000000000 > [ 1261.174390] x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 > [ 1261.181714] x23: ffff800082a93b38 x22: ffff6ec68690f2d8 x21: ffff6ec6896aed30 > [ 1261.189031] x20: ffff6ec68246b830 x19: ffff6ec68246b800 x18: 0000000000000006 > [ 1261.196355] x17: ffff9259b7856000 x16: ffffdc7b42e3eaec x15: 725f7276645f6361 > [ 1261.203679] x14: 0000000000000000 x13: 0000000000000002 x12: 0000000000000000 > [ 1261.210996] x11: 0000000000000040 x10: ffffdc7b447de0b0 x9 : ffffdc7b447de0a8 > [ 1261.218321] x8 : ffff6ec680400028 x7 : 0000000000000000 x6 : 0000000000000000 > [ 1261.225645] x5 : ffff6ec680400000 x4 : 00000000c0000000 x3 : ffff6ec6896ae8b0 > [ 1261.232963] x2 : dead000000000122 x1 : dead000000000122 x0 : ffff6ec68246b830 > [ 1261.240287] Call trace: > [ 1261.242806] device_link_put_kref+0x44/0x110 > [ 1261.247190] device_link_del+0x30/0x48 > [ 1261.251040] phy_detach+0x24/0x15c > [ 1261.254530] phy_disconnect+0x44/0x5c > [ 1261.258295] phylink_disconnect_phy+0x64/0xb0 > [ 1261.262764] stmmac_release+0x58/0x2d4 [stmmac] > [ 1261.267425] __dev_close_many+0xac/0x14c > [ 1261.271458] dev_close_many+0x88/0x134 > [ 1261.275308] unregister_netdevice_many_notify+0x130/0x7d0 > [ 1261.280852] unregister_netdevice_queue+0xd4/0xdc > [ 1261.285682] unregister_netdev+0x24/0x38 > [ 1261.289715] stmmac_dvr_remove+0x80/0x150 [stmmac] > [ 1261.294636] devm_stmmac_pltfr_remove+0x24/0x48 [stmmac_platform] > [ 1261.300887] devm_action_release+0x14/0x20 > [ 1261.305090] devres_release_all+0xa0/0x100 > [ 1261.309293] device_unbind_cleanup+0x18/0x68 > [ 1261.313676] device_release_driver_internal+0x1f4/0x228 > [ 1261.319039] driver_detach+0x4c/0x98 > [ 1261.322708] bus_remove_driver+0x6c/0xbc > [ 1261.326739] driver_unregister+0x30/0x60 > [ 1261.330772] platform_driver_unregister+0x14/0x20 > [ 1261.335603] qcom_ethqos_driver_exit+0x18/0x1a8 [dwmac_qcom_ethqos] > [ 1261.342035] __arm64_sys_delete_module+0x19c/0x288 > [ 1261.346952] invoke_syscall+0x48/0x110 > [ 1261.350804] el0_svc_common.constprop.0+0xc4/0xe4 > [ 1261.355636] do_el0_svc+0x38/0x94 > [ 1261.359040] el0_svc+0x2c/0x84 > [ 1261.362178] el0t_64_sync_handler+0x120/0x12c > [ 1261.366646] el0t_64_sync+0x190/0x194 > [ 1261.370413] Code: d2802441 aa1403e0 f2fbd5a1 f9000462 (f9000043) > [ 1261.376661] ---[ end trace 0000000000000000 ]--- > Segmentation fault > Yep. This is a very deep problem and will be the same for any MAC reaching into another MAC's node to get its PHY's phandle. :( Bart
