Subject: SoCFPGA ethernet broken

From: Dinh Nguyen <[email-masked]>
Date: Thu, 15 Oct 2015 14:09:22 -0500

Hi,

commit "8b63ec1837fa phylib: Make PHYs children of their MDIO bus, not
the bus' parent." seems to have broken ethernet support for the SoCFPGA
platform which is using the stmmac ethernet driver.

It appears that during DHCP, it cannot get an IP address. This only
happens if ethernet was not used by the bootloader to tftp an kernel
image. If I use the bootloader to tftp an image then ethernet is working
fine. So I think the PHY is not getting enabled properly.

If I revert this patch, then ethernet is back to working on the platform.

I just tested this in the v4.3-rc5.

Will continue to debug, but was wondering if anyone has seen this issue.

Thanks for any help/comments.

Dinh

Bootlog below.
----
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Linux version 4.3.0-rc5-00037-g5b5f145
(dinguyen@linux-builds1) (gcc version 4.7.3 20130226 (prerelease) (crosstool
-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #1 SMP
Thu Oct 15 13:55:48 CDT 2015
[    0.000000] CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7),
cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[    0.000000] Machine model: Altera SOCFPGA Cyclone V SoC Development Kit
[    0.000000] Truncating RAM at 0x00000000-0x40000000 to -0x2f800000
[    0.000000] Consider using a HIGHMEM enabled kernel.
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] On node 0 totalpages: 194560
[    0.000000] free_area_init_node: node 0, pgdat c067c080, node_mem_map
ef20b000
[    0.000000]   Normal zone: 1520 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 194560 pages, LIFO batch:31
[    0.000000] PERCPU: Embedded 13 pages/cpu @ef1df000 s21760 r8192
d23296 u53248
[    0.000000] pcpu-alloc: s21760 r8192 d23296 u53248 alloc=13*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 193040
[    0.000000] Kernel command line: console=ttyS0,115200 root=/dev/nfs
rw nfsroot=137.57.160.210:/home/dinguyen/rootfs_yocto ip=dh
cp debug
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288
bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144
bytes)
[    0.000000] Memory: 764368K/778240K available (4696K kernel code,
274K rwdata, 1328K rodata, 324K init, 131K bss, 13872K reserv
ed, 0K cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xf0000000 - 0xff000000   ( 240 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xef800000   ( 760 MB)
[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)
[    0.000000]       .text : 0xc0008000 - 0xc05ea5f4   (6026 kB)
[    0.000000]       .init : 0xc05eb000 - 0xc063c000   ( 324 kB)
[    0.000000]       .data : 0xc063c000 - 0xc0680b30   ( 275 kB)
[    0.000000]        .bss : 0xc0680b30 - 0xc06a1a38   ( 132 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  Build-time adjustment of leaf fanout to 32.
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] L2C-310 enabling early BRESP for Cortex-A9
[    0.000000] L2C-310 full line of zeros enabled for Cortex-A9
[    0.000000] L2C-310 ID prefetch enabled, offset 1 lines
[    0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000] L2C-310 cache controller enabled, 8 ways, 512 kB
[    0.000000] L2C-310: CACHE_ID 0x410030c9, AUX_CTRL 0x76060001
[    0.000000] clocksource: timer1: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604467 ns
[    0.000005] sched_clock: 32 bits at 100MHz, resolution 10ns, wraps
every 21474836475ns
[    0.000134] Console: colour dummy device 80x30
[    0.000151] Calibrating delay loop... 1836.64 BogoMIPS (lpj=9183232)
[    0.059867] pid_max: default: 32768 minimum: 301
[    0.059938] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.059947] Mountpoint-cache hash table entries: 2048 (order: 1, 8192
bytes)
[    0.060411] CPU: Testing write buffer coherency: ok
[    0.060586] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.060735] Setting up static identity map for 0x8280 - 0x82d8
[    0.119895] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.119954] Brought up 2 CPUs
[    0.119968] SMP: Total of 2 processors activated (3679.84 BogoMIPS).
[    0.119974] CPU: All CPU(s) started in SVC mode.
[    0.120594] devtmpfs: initialized
[    0.124057] VFP support v0.3: implementor 41 architecture 3 part 30
variant 9 rev 4
[    0.124296] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.125249] NET: Registered protocol family 16
[    0.125991] DMA: preallocated 256 KiB pool for atomic coherent
allocations
[    0.129791] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1
watchpoint registers.
[    0.129803] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    0.163465] SCSI subsystem initialized
[    0.163736] usbcore: registered new interface driver usbfs
[    0.163793] usbcore: registered new interface driver hub
[    0.163848] usbcore: registered new device driver usb
[    0.164469] pps_core: LinuxPPS API ver. 1 registered
[    0.164478] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
Rodolfo Giometti <[email-masked]>
[    0.164508] PTP clock support registered
[    0.165340] clocksource: Switched to clocksource timer1
[    0.188264] NET: Registered protocol family 2
[    0.188761] TCP established hash table entries: 8192 (order: 3, 32768
bytes)
[    0.188839] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[    0.188961] TCP: Hash tables configured (established 8192 bind 8192)
[    0.189040] UDP hash table entries: 512 (order: 2, 16384 bytes)
[    0.189083] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[    0.189250] NET: Registered protocol family 1
[    0.189570] RPC: Registered named UNIX socket transport module.
[    0.189579] RPC: Registered udp transport module.
[    0.189584] RPC: Registered tcp transport module.
[    0.189589] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.190622] futex hash table entries: 512 (order: 3, 32768 bytes)
[    0.199426] ntfs: driver 2.1.32 [Flags: R/W].
[    0.200257] io scheduler noop registered (default)
[    0.204012] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
[    0.204920] console [ttyS0] disabled
[    0.204954] ffc02000.serial0: ttyS0 at MMIO 0xffc02000 (irq = 34,
base_baud = 6250000) is a 16550A
[    0.740840] console [ttyS0] enabled
[    0.744835] ffc03000.serial1: ttyS1 at MMIO 0xffc03000 (irq = 35,
base_baud = 6250000) is a 16550A
[    0.755333] brd: module loaded
[    0.758903] CAN device driver interface
[    0.763108] stmmac - user ID: 0x10, Synopsys ID: 0x37
[    0.768216]  Ring mode enabled
[    0.771259]  DMA HW capability register supported
[    0.775776]  Enhanced/Alternate descriptors
[    0.780122]  Enabled extended descriptors
[    0.784112]  RX Checksum Offload Engine supported (type 2)
[    0.789585]  TX Checksum insertion supported
[    0.793835]  Enable RX Mitigation via HW Watchdog Timer
[    0.804992] libphy: stmmac: probed
[    0.808410] eth0: PHY ID 00221611 at 4 IRQ POLL (stmmac-0:04) active
[    1.665377] dwc2 ffb40000.usb: DWC OTG Controller
[    1.670086] dwc2 ffb40000.usb: new USB bus registered, assigned bus
number 1
[    1.677138] dwc2 ffb40000.usb: irq 36, io mem 0x00000000
[    1.683139] hub 1-0:1.0: USB hub found
[    1.686917] hub 1-0:1.0: 1 port detected
[    1.691477] mousedev: PS/2 mouse device common for all mice
[    1.697271] i2c /dev entries driver
[    1.701325] Synopsys Designware Multimedia Card Interface Driver
[    1.707550] dw_mmc ff704000.dwmmc0: IDMAC supports 32-bit address mode.
[    1.714163] dw_mmc ff704000.dwmmc0: Using PIO mode.
[    1.719035] dw_mmc ff704000.dwmmc0: Version ID is 240a
[    1.724185] dw_mmc ff704000.dwmmc0: DW MMC controller at irq 30,32
bit host data width,1024 deep fifo
[    1.733502] dw_mmc ff704000.dwmmc0: Got CD GPIO
[    1.775329] dw_mmc ff704000.dwmmc0: 1 slots initialized
[    1.780769] usbcore: registered new interface driver usbhid
[    1.786338] usbhid: USB HID core driver
[    1.790327] oprofile: no performance counters
[    1.794750] oprofile: using timer interrupt.
[    1.799920] NET: Registered protocol family 10
[    1.805084] sit: IPv6 over IPv4 tunneling driver
[    1.810277] NET: Registered protocol family 17
[    1.814726] NET: Registered protocol family 15
[    1.819173] can: controller area network core (rev 20120528 abi 9)
[    1.825384] NET: Registered protocol family 29
[    1.829817] can: raw protocol (rev 20120528)
[    1.834073] can: broadcast manager protocol (rev 20120528 t)
[    1.839727] can: netlink gateway (rev 20130117) max_hops=1
[    1.845361] 8021q: 802.1Q VLAN Support v1.8
[    1.849630] ThumbEE CPU extension supported.
[    1.853900] Registering SWP/SWPB emulation handler
[    1.854029] mmc_host mmc0: Bus speed (slot 0) = 50000000Hz (slot req
50000000Hz, actual 50000000HZ div = 0)
[    1.854079] mmc0: new high speed SDHC card at address aaaa
[    1.854496] mmcblk0: mmc0:aaaa SU32G 29.7 GiB
[    1.855953]  mmcblk0: p1 p2 p3
[    1.985343] Sending DHCP requests ..
[    5.955860] socfpga-dwmac ff702000.ethernet eth0: Link is Up -
1Gbps/Full - flow control rx/tx
[    9.105279] .... timed out!
[   85.166664] IP-Config: Retrying forever (NFS root)...
[   85.256666] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   89.245860] socfpga-dwmac ff702000.ethernet eth0: Link is Up -
1Gbps/Full - flow control rx/tx
[   89.255301] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   89.275329] Sending DHCP requests ...... timed out!
[  161.306641] IP-Config: Retrying forever (NFS root)...
[  161.396643] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[  165.385861] socfpga-dwmac ff702000.ethernet eth0: Link is Up -
1Gbps/Full - flow control rx/tx
[  165.395301] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready