IMX6Q-PCIE problem

[raoxd]

   i use IMX6q pcie as RC to connect FPGA direcly.

   in L3.0.35_4.1.0(linux 3.0.35),sytem run succeed, i can use FPGA driver to control FPGA device。

   now, when L3.0.101_4.1.1 release, i try to update.but FGPA can not run success when i load driver. when i try to read or write FPGA reg, i prompt fail.

   the wrong log is below:

[  710.741196] PCI: enabling device 0000:02:04.0 (0140 -> 0142)

[  710.746926] AudioCardProbe!

[  710.754666] PCI Driver mem space Bar0:start at 0x1000000, end at 0x13fffff, Flag is 0x42208, len is 4194304,     Bar1: start at 0x1500000, end at 0x1503fff, Flag is 0x40200, len is 16384, irq is 155

[  710.777415] alloc virtural addr is Bar0:0xc9800000, Bar1:0xc0c10000

[  710.907366] Unable to handle kernel NULL pointer dereference at virtual address 00000000

[  710.915462] pgd = bc830000

[  710.918171] [00000000] *pgd=4c4b1831, *pte=00000000, *ppte=00000000

[  710.924486] Internal error: Oops: 17 [#1] PREEMPT SMP

[  710.929542] Modules linked in: audiocard(+)

[  710.933760] CPU: 0    Not tainted  (3.0.101-2790-gc248ed7 #8)

[  710.939517] PC is at vsnprintf+0x38/0x3ec

[  710.943533] LR is at vscnprintf+0xc/0x24

[  710.947462] pc : [<8029a7cc>]    lr : [<8029ac00>]    psr: 20000093

[  710.947467] sp : bc4e7bdc  ip : c097e000  fp : 00000020

[  710.958958] r10: 80b3d700  r9 : bc4e7cd8  r8 : bc4e7cd8

[  710.964187] r7 : 00000400  r6 : 80b3d700  r5 : 00000000  r4 : 00000000

[  710.970718] r3 : bc4e7cd8  r2 : 00000000  r1 : 00000400  r0 : 80b3d700

[  710.977253] Flags: nzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user

[  710.984481] Control: 10c53c7d  Table: 4c83004a  DAC: 00000015

[  710.990231] Process insmod (pid: 1547, stack limit = 0xbc4e62f0)

[  710.996243] Stack: (0xbc4e7bdc to 0xbc4e8000)

[  711.000605] 7bc0:                                                                00005e48

[  711.008792] 7be0: 00005e86 80b069dc 00005e86 800f3998 80b3d700 00000400 00005e86 00000000

[  711.016978] 7c00: 00000000 00205b3e 00000400 80b0699c 80b3d700 00000400 00000000 bc4e7cd8

[  711.025164] 7c20: 00000000 00000000 8029ac00 00000000 800d57ac bc4e7c5e dcdc1c8e 00000058

[  711.033350] 7c40: 850daa1c 000000a5 80b3d648 80b3d648 00000000 bc4e6000 60000013 205b00a5

[  711.041536] 7c60: 30313720 3130392e 5d393638 60000020 bc4e7cbd 0000040f 00000406 c9800000

[  711.049722] 7c80: c9840004 8009e910 7f0079b0 00000000 80b069fc 00000004 00000000 000000c8

[  711.057908] 7ca0: 00000000 000000c8 c9800000 c9840004 bc36d300 00000001 bc36d300 bc4e7d6c

[  711.066094] 7cc0: 80579180 8057916c bc4e7cd8 ffffffff 7f0079b0 00000000 80b069fc 00000000

[  711.074279] 7ce0: 00000000 c9800000 00000000 0000007a 00000000 7f000568 00000000 00000000

[  711.082464] 7d00: 00000000 7f008b4c c9800000 7f002e7c 7f00c528 004e7d24 00000001 00000000

[  711.090650] 7d20: bc3adc00 c9800000 7f008b4c 7f0037f0 00000000 bc3adc00 7f008b30 7f00c528

[  711.098836] 7d40: bc36d300 7f007498 00000000 01500000 01503fff 00040200 00004000 0000009b

[  711.107022] 7d60: 00000000 bc36d390 00000000 69647541 7261436f 80003064 000000d0 801a0324

[  711.115208] 7d80: 80a47a7c bc783cc0 00000008 bc000ae0 bc6fbba0 bc783cc0 0000001f 801a07e0

[  711.123394] 7da0: 801041e4 801a0344 bc783cc0 bc4e7de0 bc4e7de0 801a0844 bc079d00 bc783cc0

[  711.131580] 7dc0: bc783cc0 00000000 bc4e7de0 bc3ad860 bc3ad8c0 bc3add28 bc3adc60 bc3adc00

[  711.139766] 7de0: 7f008e88 00000000 7f008df4 7f008e24 801041e4 802afff0 bc3adc60 80b5860c

[  711.147953] 7e00: bc3adc94 00000000 7f008e24 7f008ec0 7f00f000 80307210 bc3adc60 7f008e24

[  711.156138] 7e20: bc3adc94 00000000 00000001 803073a8 7f008e24 00000000 8030731c 80306428

[  711.164324] 7e40: bc030540 bc1508d8 7f008e24 80b15eb8 bc09b420 80306be4 7f007d0c 7f008e24

[  711.172510] 7e60: 7f008e24 7f008e24 7f008e24 80b15eb8 00000000 00000001 7f00f000 80307854

[  711.180695] 7e80: 7f008df4 7f008e24 80b15eb8 00000000 00000001 802b0b18 00000000 80b3bf00

[  711.188881] 7ea0: bc4e6000 00000001 00000000 80099458 00000010 8bf99c40 00000010 7f00f000

[  711.197067] 7ec0: 40000000 00000010 bc000ce0 00000000 00000001 80106cc4 7f008ec0 7f008ec0

[  711.205253] 7ee0: 7f008f08 00000001 bc4a2340 00000001 7f008ec0 801040fc 801041e4 80106464

[  711.213438] 7f00: 7f008ecc 00000000 00000000 00000124 00000000 00011008 7f008fec 7f008ecc

[  711.221624] 7f20: 00000000 c0bf8000 0000f5e4 c0c02388 c0c021a8 c0c066e8 bc7a0c00 0000c83c

[  711.229810] 7f40: 0000d71c 00000000 00000000 00000029 0000002a 0000001e 00000022 0000001a

[  711.237995] 7f60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 80a93ac4

[  711.246180] 7f80: 00000003 00000002 0000f5e4 00011018 00000080 8009f084 bc4e6000 00000000

[  711.254366] 7fa0: 00000000 8009ef00 00000002 0000f5e4 00011018 0000f5e4 00011008 2ad8c248

[  711.262552] 7fc0: 00000002 0000f5e4 00011018 00000080 00000003 00000000 00010000 00000000

[  711.270739] 7fe0: 00011008 7eecdc4c 00008834 2ad2bfc4 60000010 00011018 00000000 00000000

[  711.278933] [<8029a7cc>] (vsnprintf+0x38/0x3ec) from [<8029ac00>] (vscnprintf+0xc/0x24)

[  711.286954] [<8029ac00>] (vscnprintf+0xc/0x24) from [<800d57ac>] (vprintk+0xf4/0x4c8)

[  711.294806] [<800d57ac>] (vprintk+0xf4/0x4c8) from [<80579180>] (printk+0x1c/0x2c)

[  711.302417] [<80579180>] (printk+0x1c/0x2c) from [<7f0079b0>] (g_pStrVoiceCardDeviceInfoTbl+0x40/0xfffffd58 [audiocard])

[  711.313297] Code: ba0000e0 e59da014 e3a0b020 e59d1018 (e5d23000)

[  711.319604] ---[ end trace c78ae217b17be00b ]---

[  711.324247] note: insmod[1547] exited with preempt_count 2

[  711.329764] BUG: scheduling while atomic: insmod/1547/0x40000003

[  711.335788] Modules linked in: audiocard(+)

[  711.340031] [<800a5b0c>] (unwind_backtrace+0x0/0xf8) from [<8057d4bc>] (__schedule+0x4c0/0x704)

[  711.348760] [<8057d4bc>] (__schedule+0x4c0/0x704) from [<800cff30>] (__cond_resched+0x24/0x34)

[  711.357399] [<800cff30>] (__cond_resched+0x24/0x34) from [<8057d798>] (_cond_resched+0x34/0x44)

[  711.366146] [<8057d798>] (_cond_resched+0x34/0x44) from [<801359d0>] (unmap_vmas+0x41c/0x648)

[  711.374701] [<801359d0>] (unmap_vmas+0x41c/0x648) from [<8013b150>] (exit_mmap+0x108/0x244)

[  711.383080] [<8013b150>] (exit_mmap+0x108/0x244) from [<800d2b1c>] (mmput+0x48/0x114)

[  711.390924] [<800d2b1c>] (mmput+0x48/0x114) from [<800d6bb0>] (exit_mm+0x128/0x168)

[  711.398606] [<800d6bb0>] (exit_mm+0x128/0x168) from [<800d8534>] (do_exit+0x58c/0x704)

[  711.406548] [<800d8534>] (do_exit+0x58c/0x704) from [<800a2674>] (die+0x228/0x284)

[  711.414145] [<800a2674>] (die+0x228/0x284) from [<805783d0>] (__do_kernel_fault.part.4+0x54/0x74)

[  711.423043] [<805783d0>] (__do_kernel_fault.part.4+0x54/0x74) from [<800a979c>] (do_page_fault+0x2b4/0x31c)

[  711.432816] [<800a979c>] (do_page_fault+0x2b4/0x31c) from [<800992f4>] (do_DataAbort+0x34/0x9c)

[  711.441544] [<800992f4>] (do_DataAbort+0x34/0x9c) from [<8009e910>] (__dabt_svc+0x70/0xa0)

[  711.449814] Exception stack(0xbc4e7b90 to 0xbc4e7bd8)

[  711.454916] 7b80:                                     80b3d700 00000400 00000000 bc4e7cd8

[  711.463116] 7ba0: 00000000 00000000 80b3d700 00000400 bc4e7cd8 bc4e7cd8 80b3d700 00000020

[  711.471312] 7bc0: c097e000 bc4e7bdc 8029ac00 8029a7cc 20000093 ffffffff

[  711.477943] [<8009e910>] (__dabt_svc+0x70/0xa0) from [<8029a7cc>] (vsnprintf+0x38/0x3ec)

[  711.486056] [<8029a7cc>] (vsnprintf+0x38/0x3ec) from [<8029ac00>] (vscnprintf+0xc/0x24)

[  711.494083] [<8029ac00>] (vscnprintf+0xc/0x24) from [<800d57ac>] (vprintk+0xf4/0x4c8)

[  711.501974] [<800d57ac>] (vprintk+0xf4/0x4c8) from [<80579180>] (printk+0x1c/0x2c)

[  711.509579] [<80579180>] (printk+0x1c/0x2c) from [<7f0079b0>] (g_pStrVoiceCardDeviceInfoTbl+0x40/0xfffffd58 [audiocard])

Segmentation fault

system log is in the attachment

Original Attachment has been moved to: system.log.zip

[igorpadykov]

Hi rao

I would suggest to rebuild all image from scratch, including fpga

and audiocard.ko drivers for new 3.0.101 kernel.

Clean up all the configure files and objects :

./ltib –m distclean

then run the ./ltib –config command, choose the kernel version as

linux 3.0.101-imx

Best regards

igor

[raoxd]

i create new environment to build 3.0.101 according to document" i.MX 6 Linux 3.0.101_4.1.1 Patch Release Notes".

i can also try to use pcie connect network card（intel 82574）directly. the network driver(e1000e.ko) also crash just like fpga driver.

but network card and fpga device can work fine in 3.0.35.

[igorpadykov]

Hi rao

you can also check if PCIe is enabled both in Uboot and Linux

as described below

uboot-imx.git - Freescale i.MX u-boot Tree

~igor

[raoxd]

Hi igorpadykov

the u-boot version that you provide is 2014.04,but 4.1.1 u-boot version is 2009.

we cannot find pcie enable in u-boot 2009.

do you mean we must update u-boot to 2014？

i just wonder why pcie can run succeed in L4.1.0.but fail in L4.1.1.

i trying to run L4.1.1 in freescale SDB broad, to found whether can run correctly when enable PCIE。

[igorpadykov]

Hi rao

you can check IOMUXC_GPR8 in

L4.1.0.and make the same in L4.1.1

~igor