On Thu, Jun 26, 2014 at 12:43:19AM -0300, Fabio Estevam wrote: > On Thu, Jun 26, 2014 at 12:12 AM, Shawn Guo <shawn.guo@xxxxxxxxxxxxx> wrote: > > On Tue, Jun 24, 2014 at 04:18:27PM -0300, Fabio Estevam wrote: > >> From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx> > >> > >> When the mx6 PCI conctroller is initialized in the bootloader we see a kernel > >> hang inside imx6_add_pcie_port(). > >> > >> Adding a 30ms delay allows the kernel to boot. > > > > We may not want to add a random delay into the driver before we > > understand the root cause of the issue. > > Yes, that's why I sent this as RFC and also explained it below the --- > line that I am actually trying to get some help with this issue. > > > > > Do you see this issue with FSL kernel? > > Yes, it also hangs. > > It is reproducible in 100% of the boots. Just need to use mainline > U-boot (which has PCI driver enabled by default). > I am using an Intel Wifi 7260 PCI card. This was also reported by > other folks in the U-boot list. Richard, Can you schedule some time to look at this issue? I think it will come to us sooner or later if any our customer enables PCIe before launching kernel? Shawn > > Below is the log with linux-next kernel and earlyprintk enabled: > > U-Boot 2014.07-rc1-15766-g5f46552 (Jun 24 2014 - 17:41:55) > > CPU: Freescale i.MX6Q rev1.2 at 792 MHz > Reset cause: POR > Board: MX6-SabreSD > I2C: ready > DRAM: 1 GiB > MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2 > 00:01.0 - 16c3:abcd - Bridge device > 01:00.0 - 8086:08b1 - Network controller > No panel detected: default to Hannstar-XGA > Display: Hannstar-XGA (1024x768) > In: serial > Out: serial > Err: serial > PMIC: PFUZE100 ID=0x10 > Net: FEC [PRIME] > Hit any key to stop autoboot: 0 > Booting from net ... > FEC Waiting for PHY auto negotiation to complete.. done > Using FEC device > TFTP from server 192.168.0.2; our IP address is 192.168.0.8 > Filename 'zImage'. > Load address: 0x12000000 > Loading: ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ############################################################# > 1.7 MiB/s > done > Bytes transferred = 5302272 (50e800 hex) > Using FEC device > TFTP from server 192.168.0.2; our IP address is 192.168.0.8 > Filename 'imx6q-sabresd.dtb'. > Load address: 0x18000000 > Loading: ####### > 1.5 MiB/s > done > Bytes transferred = 33744 (83d0 hex) > Kernel image @ 0x12000000 [ 0x000000 - 0x50e800 ] > ## Flattened Device Tree blob at 18000000 > Booting using the fdt blob at 0x18000000 > Using Device Tree in place at 18000000, end 1800b3cf > > Starting kernel ... > > Uncompressing Linux... done, booting the kernel. > Booting Linux on physical CPU 0x0 > Linux version 3.16.0-rc2-next-20140625 (fabio@fabio-Latitude-E6410) > (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #1440 SMP Thu > Jun 26 00:38:33 BRT 2014 > CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d > CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache > Machine model: Freescale i.MX6 Quad SABRE Smart Device Board > bootconsole [earlycon0] enabled > cma: Reserved 16 MiB at 4f000000 > Memory policy: Data cache writealloc > PERCPU: Embedded 8 pages/cpu @be7a6000 s8896 r8192 d15680 u32768 > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 260096 > Kernel command line: console=ttymxc0,115200 root=/dev/nfs ip=dhcp > nfsroot=192.168.0.2:/tftpboot/rfs,v3,tcp earlyprintk > PID hash table entries: 4096 (order: 2, 16384 bytes) > Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) > Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) > Memory: 1004880K/1048576K available (6579K kernel code, 406K rwdata, > 2264K rodata, 340K init, 8331K bss, 43696K reserved, 0K highmem) > Virtual kernel memory layout: > vector : 0xffff0000 - 0xffff1000 ( 4 kB) > fixmap : 0xffc00000 - 0xffe00000 (2048 kB) > vmalloc : 0xc0800000 - 0xff000000 (1000 MB) > lowmem : 0x80000000 - 0xc0000000 (1024 MB) > pkmap : 0x7fe00000 - 0x80000000 ( 2 MB) > modules : 0x7f000000 - 0x7fe00000 ( 14 MB) > .text : 0x80008000 - 0x808aafbc (8844 kB) > .init : 0x808ab000 - 0x809002c0 ( 341 kB) > .data : 0x80902000 - 0x80967a40 ( 407 kB) > .bss : 0x80967a48 - 0x8118aa10 (8332 kB) > SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 > Hierarchical RCU implementation. > NR_IRQS:16 nr_irqs:16 16 > L2C-310 erratum 769419 enabled > L2C-310 enabling early BRESP for Cortex-A9 > L2C-310 full line of zeros enabled for Cortex-A9 > L2C-310 ID prefetch enabled, offset 1 lines > L2C-310 dynamic clock gating enabled, standby mode enabled > L2C-310 cache controller enabled, 16 ways, 1024 kB > L2C-310: CACHE_ID 0x410000c7, AUX_CTRL 0x76070001 > Switching to timer-based delay loop, resolution 15ns > sched_clock: 32 bits at 66MHz, resolution 15ns, wraps every 65075262448ns > Console: colour dummy device 80x30 > Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar > ... MAX_LOCKDEP_SUBCLASSES: 8 > ... MAX_LOCK_DEPTH: 48 > ... MAX_LOCKDEP_KEYS: 8191 > ... CLASSHASH_SIZE: 4096 > ... MAX_LOCKDEP_ENTRIES: 32768 > ... MAX_LOCKDEP_CHAINS: 65536 > ... CHAINHASH_SIZE: 32768 > memory used by lock dependency info: 5167 kB > per task-struct memory footprint: 1152 bytes > Calibrating delay loop (skipped), value calculated using timer > frequency.. 132.00 BogoMIPS (lpj=660000) > pid_max: default: 32768 minimum: 301 > Mount-cache hash table entries: 2048 (order: 1, 8192 bytes) > Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes) > CPU: Testing write buffer coherency: ok > CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 > Setting up static identity map for 0x10672328 - 0x10672398 > CPU1: Booted secondary processor > CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 > CPU2: Booted secondary processor > CPU2: thread -1, cpu 2, socket 0, mpidr 80000002 > CPU3: Booted secondary processor > CPU3: thread -1, cpu 3, socket 0, mpidr 80000003 > Brought up 4 CPUs > SMP: Total of 4 processors activated. > CPU: All CPU(s) started in SVC mode. > devtmpfs: initialized > VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4 > pinctrl core: initialized pinctrl subsystem > regulator-dummy: no parameters > NET: Registered protocol family 16 > DMA: preallocated 256 KiB pool for atomic coherent allocations > CPU identified as i.MX6Q, silicon rev 1.2 > vdd1p1: 800 <--> 1375 mV at 1100 mV > vdd3p0: 2800 <--> 3150 mV at 3000 mV > vdd2p5: 2000 <--> 2750 mV at 2400 mV > vddarm: 725 <--> 1450 mV at 1100 mV > vddpu: 725 <--> 1450 mV at 1100 mV > vddsoc: 725 <--> 1450 mV at 1175 mV > hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers. > hw-breakpoint: maximum watchpoint size is 4 bytes. > imx6q-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver > mxs-dma 110000.dma-apbh: initialized > usb_otg_vbus: 5000 mV > usb_h1_vbus: 5000 mV > wm8962-supply: no parameters > vgaarb: loaded > SCSI subsystem initialized > usbcore: registered new interface driver usbfs > usbcore: registered new interface driver hub > usbcore: registered new device driver usb > i2c i2c-0: IMX I2C adapter registered > i2c i2c-1: IMX I2C adapter registered > i2c i2c-2: IMX I2C adapter registered > Linux video capture interface: v2.00 > pps_core: LinuxPPS API ver. 1 registered > pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti > <giometti@xxxxxxxx> > PTP clock support registered > Advanced Linux Sound Architecture Driver Initialized. > cfg80211: Calling CRDA to update world regulatory domain > Switched to clocksource mxc_timer1 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
