Hi All, Looks like there is a pcie issue on R-Car M3-W WS1.1 Salvator-XS board with upstream kernel. As we know M3-W board has 2 memory banks Bank #0: 0x048000000 - 0x0bfffffff, 1.9 GiB Bank #1: 0x600000000 - 0x67fffffff, 2 GiB I am using PCIE-ethernet card(Ethernet controller: Intel Corporation 82574L Gigabit Network Connection) for pcie testing. With default configuration, it detects the ethernet card root@salvator-x:~# lspci 00:00.0 PCI bridge: Renesas Technology Corp. Device 0028 01:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection However, if we enable kernel configuration for PCIE-ethernet card(CONFIG_E1000E=y)then i get below crash during boot [ 11.999119] ------------[ cut here ]------------ [ 12.004979] NETDEV WATCHDOG: eth0 (e1000e): transmit queue 0 timed out [ 12.012734] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:443 dev_watchdog+0x3e8/0x420 [ 12.022206] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.2.0-rc3-arm64-renesas-00004-g2e3a083-dirty #25 [ 12.032728] Hardware name: Renesas Salvator-X 2nd version board based on r8a7796 (DT) [ 12.041772] pstate: 60000005 (nZCv daif -PAN -UAO) [ 12.047756] pc : dev_watchdog+0x3e8/0x420 [ 12.052948] lr : dev_watchdog+0x3e8/0x420 [ 12.058111] sp : ffff000010003d00 [ 12.062557] x29: ffff000010003d00 x28: 0000000000000002 [ 12.069000] x27: 00000000ffffffff x26: ffff000010f1c000 [ 12.075426] x25: ffff800639324430 x24: ffff000010f4f740 [ 12.081829] x23: ffff8006393243e0 x22: ffff00001104c000 [ 12.088207] x21: ffff000010f4a000 x20: ffff800639324000 [ 12.094564] x19: 0000000000000000 x18: ffffffffffffffff [ 12.100903] x17: 00000000000040f8 x16: 000000000000403c [ 12.107222] x15: 0000000000000001 x14: ffff000010baef68 [ 12.113520] x13: 0000000000000000 x12: 0000000000000000 [ 12.119809] x11: 0000000000000002 x10: 0000000000000002 [ 12.126077] x9 : 0000000000000000 x8 : ffff000010f4f708 [ 12.132331] x7 : ffff00001015d06c x6 : ffff000010f52000 [ 12.138574] x5 : 0000000000000000 x4 : 0000000000000002 [ 12.144798] x3 : ffffffffffffff50 x2 : ffff000010f6f7d8 [ 12.151022] x1 : 6610066f85848800 x0 : 0000000000000000 [ 12.157235] Call trace: [ 12.160547] dev_watchdog+0x3e8/0x420 [ 12.165081] call_timer_fn+0xbc/0x400 [ 12.169596] expire_timers+0x110/0x230 [ 12.174194] run_timer_softirq+0xe4/0x1a0 [ 12.179047] __do_softirq+0x114/0x578 [ 12.183542] irq_exit+0x144/0x150 [ 12.187665] __handle_domain_irq+0x60/0xb8 [ 12.192558] gic_handle_irq+0x58/0xa8 [ 12.197014] el1_irq+0xbc/0x180 [ 12.200913] arch_cpu_idle+0x34/0x238 [ 12.205308] default_idle_call+0x1c/0x40 [ 12.209961] do_idle+0x1fc/0x2f0 [ 12.213895] cpu_startup_entry+0x24/0x28 [ 12.218540] rest_init+0x1a0/0x270 [ 12.222671] arch_call_rest_init+0xc/0x14 [ 12.227417] start_kernel+0x4a8/0x4d4 [ 12.231818] irq event stamp: 40197 [ 12.235962] hardirqs last enabled at (40196): [<ffff00001015d12c>] console_unlock+0x3ec/0x5c0 [ 12.245376] hardirqs last disabled at (40197): [<ffff0000100817a4>] do_debug_exception+0xbc/0x178 [ 12.255042] softirqs last enabled at (40174): [<ffff0000100f13a8>] _local_bh_enable+0x20/0x40 [ 12.264434] softirqs last disabled at (40175): [<ffff0000100f17e4>] irq_exit+0x144/0x150 [ 12.273278] ---[ end trace cfa1ae1709343a35 ]--- [ 12.278880] e1000e 0000:01:00.0 eth0: Reset adapter unexpectedly Q1) Has any one observed this issue? It works without any issues for the following cases with upstream kernel. Case1: Use the below commit[1] from renesas-bsp [1]. https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas-bsp.git/commit/?id=561e15db1ed8c5cc2fc340796e2d1c643111d27a Case 2: Disable the bank#1 from device tree +++ b/arch/arm64/boot/dts/renesas/r8a7796-salvator-xs.dts +#if 0 memory@600000000 { device_type = "memory"; reg = <0x6 0x00000000 0x0 0x80000000>; }; +#endif + }; Q2) Could please share your thought on this issue? regards, Biju
