Hi
I am currently on a arm-v7a platform (Intel/Altera DE0_NANO_SOC) and i have
connected a st95hf chip via spi to the board. When using nfctool with 4.15-rc9
or 4.14.12 kernel the kernel crashes. I have seen that there is a patchset which
at least works for tags but crashes if i put a x-nucleo-nfc04a1 nfc eeprom against
the reader: https://www.spinics.net/lists/linux-wireless/msg161940.html
I have verified with this patchset that my st95hf board seems to be properly
connected to my board. I would also test a st25r3911b chip. Unfortunatly it
seems there is no driver to this board.
The coresponding messages on startup
look like this:
spi_altera ff250000.spif0: registered master spi0
spi spi0.0: setup mode 0, 8 bits/w, 1000000 Hz max --> 0
spi_altera ff250000.spif0: registered child spi0.0
spi_altera ff250000.spif0: base 21935e98, irq 42
nfc: nfc_init: NFC Core ver 0.1
NET: Registered protocol family 39
st95hf spi0.0: NFC: ST95HF driver probe called.
I have neard 0.16 running on the device:
nfctool -d nfc0 -p initator
st95hf spi0.0: st95hf error from st95hf_spi_recv_response(), err = 0xe
nfc nfc0: type a demogain cmd, err = 0xfffffffb
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
Unhandled fault: page domain fault (0x01b) at 0x76d97a38
INFO: rcu_preempt detected stalls on CPUs/tasks:
0-...!: (0 ticks this GP) idle=9c6/140000000000000/0 softirq=1488/1488 fqs=0
(detected by 1, t=2130 jiffies, g=-24, c=-25, q=24)
Sending NMI from CPU 1 to CPUs 0:
Unhandled fault: page domain fault (0x01b) at 0x0001437c
Unable to handle kernel paging request at virtual address 7f00c000
rcu_preempt kthread starved for 2130 jiffies! g4294967272 c4294967271 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0
rcu_preempt I 0 8 2 0x00001000
[<8079add4>] (__schedule) from [<8079b2d0>] (schedule+0x58/0xb8)
[<8079b2d0>] (schedule) from [<8079f19c>] (schedule_timeout+0x1dc/0x458)
[<8079f19c>] (schedule_timeout) from [<8017f530>] (rcu_gp_kthread+0x6e0/0xaf8)
[<8017f530>] (rcu_gp_kthread) from [<801424ac>] (kthread+0x138/0x168)
[<801424ac>] (kthread) from [<801082b4>] (ret_from_fork+0x14/0x20)
The output of the 4.14.12-rt10 kernel looks like this:
nfctool -d nfc0 -p Initiate
------------[ cut here ]------------
WARNING: CPU: 0 PID: 129 at drivers/nfc/st95hf/core.c:809 st95hf_irq_thread_handler+0x108/0x3b8 [st95hf]
** 142 printk messages dropped ** Control: 10c5387d Table: 1dd5404a DAC: 00000051
** 979 printk messages dropped ** [<8010cde4>] (die) from [<801163a8>] (__do_kernel_fault.part.0+0x74/0x84)
[<801163a8>] (__do_kernel_fault.part.0) from [<80116188>] (do_page_fault+0x390/0x3a0)
[<80116188>] (do_page_fault) from [<80101288>] (do_DataAbort+0x48/0xc8)
[<80101288>] (do_DataAbort) from [<8010d7b8>] (__dabt_svc+0x58/0x80)
Exception stack(0xff7f1f80 to 0xff7f1fc8)
1f80: 80b7e58c 00000000 00000000 9e87ba00 00000000 00000000 00000000 00000000
1fa0: 00000000 80b73674 9f6e2205 00000000 9eae3cb8 ff7f1fd4 80797274 8010d76c
1fc0: 600f0193 ffffffff
[<8010d7b8>] (__dabt_svc) from [<8010d76c>] (__dabt_svc+0xc/0x80)
Code: e1a002a0 e0811100 f591f000 e1a03312 (e1912f9f)
---[ end trace 000000000000000e ]---
Kernel panic - not syncing: Fatal exception in interrupt
Unable to handle kernel paging request at virtual address 136d5cc4
pgd = 80004000
[136d5cc4] *pgd=00000000
Internal error: Oops: 5 [#13] PREEMPT SMP ARM
Modules linked in: st95hf nfc_digital crc_itu_t crc_ccitt nfc spi_altera gpio_altera
CPU: -1619872384 PID: -1619855404 Comm: ��r� Tainted: G D W 4.14.12-rt10 #1
Hardware name: Altera SOCFPGA
task: 9f72f500 task.stack: 0000002c
PC is at _clear_bit+0x20/0x38
LR is at smp_send_stop+0x38/0xc0
pc : [<807791b0>] lr : [<8010fb8c>] psr: 600f0193
sp : ff7f0610 ip : 00000000 fp : ff7f0634
r10: 9f72f500 r9 : 80b0b08c r8 : 80b7e5dc
r7 : 600f0193 r6 : 00000005 r5 : 80b064a8 r4 : ff7f0614
r3 : 00000001 r2 : 00000001 r1 : 136d5cc4 r0 : 04fb95ac
Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none
Control: 10c5387d Table: 1dd5404a DAC: 00000051
Process ��r� (pid: -1619855404, stack limit = 0x00000244)
Stack: (0xff7f0610 to 0x0000202c)
[<807791b0>] (_clear_bit) from [<8010fb8c>] (smp_send_stop+0x38/0xc0)
[<8010fb8c>] (smp_send_stop) from [<80121088>] (panic+0xfc/0x278)
[<80121088>] (panic) from [<8010cde4>] (die+0x2fc/0x300)
[<8010cde4>] (die) from [<801163a8>] (__do_kernel_fault.part.0+0x74/0x84)
[<801163a8>] (__do_kernel_fault.part.0) from [<80116188>] (do_page_fault+0x390/0x3a0)
[<80116188>] (do_page_fault) from [<80116330>] (do_translation_fault+0xd0/0xd4)
[<80116330>] (do_translation_fault) from [<80101288>] (do_DataAbort+0x48/0xc8)
[<80101288>] (do_DataAbort) from [<8010d7b8>] (__dabt_svc+0x58/0x80)
Exception stack(0xff7f07e8 to 0xff7f0830)
07e0: 04fb95ac 136d5eec 00000001 00000001 ff7f083c 80b064a8
0800: 00000005 600f0193 80b7e5dc 80b0b08c 9f72f500 ff7f085c 00000000 ff7f0838
0820: 8010fb8c 807791b0 600f0193 ffffffff
[<8010d7b8>] (__dabt_svc) from [<807791b0>] (_clear_bit+0x20/0x38)
[<807791b0>] (_clear_bit) from [<8010fb8c>] (smp_send_stop+0x38/0xc0)
[<8010fb8c>] (smp_send_stop) from [<80121088>] (panic+0xfc/0x278)
[<80121088>] (panic) from [<8010cde4>] (die+0x2fc/0x300)
[<8010cde4>] (die) from [<801163a8>] (__do_kernel_fault.part.0+0x74/0x84)
[<801163a8>] (__do_kernel_fault.part.0) from [<80116188>] (do_page_fault+0x390/0x3a0)
[<80116188>] (do_page_fault) from [<80116330>] (do_translation_fault+0xd0/0xd4)
[<80116330>] (do_translation_fault) from [<80101288>] (do_DataAbort+0x48/0xc8)
[<80101288>] (do_DataAbort) from [<8010d7b8>] (__dabt_svc+0x58/0x80)
Exception stack(0xff7f0a10 to 0xff7f0a58)
When using the st,stnfc driver linked at the beginning it works with tags:
nfctool -d nfc0 -p initiate
Start polling on nfc0 as initiator
Targets found for nfc0
Tags: [ tag3 ]
Devices: [ ]
But as soon as i put a X-NUCLEO-NFC04A1 board on the st95hf reader i get the following
output:
skbuff: skb_over_panic: text:7f05c48c len:514 put:514 head:9dd26e00 data:9dd26e01 tail:0x9dd27003 end:0x9dd26f40 dev:<NULL>
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:106!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in: nfcst_spi nfcst nfc_digital crc_itu_t crc_ccitt nfc gpio_altera spi_altera
CPU: 1 PID: 120 Comm: irq/43-nfcst Not tainted 4.14.12-rt10-gc8ea1c21435e #1
Hardware name: Altera SOCFPGA
task: 9e8e4880 task.stack: 9dcfc000
PC is at skb_panic+0x70/0x74
LR is at preempt_count_sub+0xcc/0x13c
pc : [<805e889c>] lr : [<8014c288>] psr: 60000013
sp : 9dcfdd00 ip : 9dcfdba8 fp : 9dcfdd2c
r10: 9e803000 r9 : 00000202 r8 : 00000202
r7 : 8084a770 r6 : 9dd26e00 r5 : 9dd26e01 r4 : 9dd27003
r3 : 00001000 r2 : 00001000 r1 : 80170408 r0 : 0000007b
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 10c5387d Table: 1eb6804a DAC: 00000051
Process irq/43-nfcst (pid: 120, stack limit = 0x9dcfc218)
Stack: (0x9dcfdd00 to 0x9dcfe000)
dd00: 00000202 9dd26e00 9dd26e01 9dd27003 9dd26f40 80922488 9dcfdd34 9dd26f40
dd20: 9dcfdd4c 9dcfdd30 805e9d98 805e8838 9dcfdd5c 9dd26e03 9eba99c0 9dcfdd8c
dd40: 9dcfdeec 9dcfdd50 7f05c48c 805e9d44 79f1878c 00000002 021a1584 9dcfddc8
dd60: 9dcfddc8 9e803000 00000000 80507834 00000000 00000200 00000200 00000000
dd80: 9dcfdd80 9dcfdd80 00000000 9dcfdd8c 9dcfdd8c 00000000 9dd26e03 00000200
dda0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
ddc0: 00000810 000f4240 9dcfdd5c 9dcfdd5c 00000000 9dd26e02 00000001 00000000
dde0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000811
de00: 000f4240 9dcfdd5c 9dcfdd5c 00000000 00000000 00000000 00000000 00000000
de20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
de40: 00000000 00000000 9dcfdd5b 00000000 00000001 00000000 00000000 00000000
de60: 00000000 00000000 00000000 00000000 00000000 00000802 000f4240 9dcfdeb8
de80: 9dcfdd5c 00000000 9dd26e01 00000001 00000000 00000000 00000000 00000000
dea0: 00000000 00000000 00000000 00000000 00000811 000f4240 9dcfdd5c 9dcfde7c
dec0: 00000001 9ea2ec10 9ea2ec2c 9eba99c0 00000001 9e8fb800 9eb5ebc0 80174abc
dee0: 9dcfdf0c 9dcfdef0 7f05c5c0 7f05c294 9eb5ebc0 9e8fb800 00000000 00000001
df00: 9dcfdf2c 9dcfdf10 80174ae8 7f05c570 9eb5ebe4 9dcfc000 00000000 00000001
df20: 9dcfdf7c 9dcfdf30 80174e10 80174ac8 80b7323f 9eb5ebc0 9eb5ebc0 00000000
df40: 9dcfc000 9eb5ebe4 00000000 80174bd0 9dcfc000 9eb5ec40 00000000 9eb5eb80
df60: 9eb5ebc0 80174cb4 9ea77b58 9eb5ec5c 9dcfdfac 9dcfdf80 801437cc 80174cc0
df80: 9dcfc000 9eb5eb80 80143690 00000000 00000000 00000000 00000000 00000000
dfa0: 00000000 9dcfdfb0 80107f1c 8014369c 00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 10090002 1000400c
[<805e889c>] (skb_panic) from [<805e9d98>] (skb_put+0x60/0x64)
[<805e9d98>] (skb_put) from [<7f05c48c>] (nfcst_spi_recv_resp+0x204/0x2dc [nfcst_spi])
[<7f05c48c>] (nfcst_spi_recv_resp [nfcst_spi]) from [<7f05c5c0>] (nfcst_spi_irq_thread_handler+0x5c/0xb0 [nfcst_spi])
[<7f05c5c0>] (nfcst_spi_irq_thread_handler [nfcst_spi]) from [<80174ae8>] (irq_thread_fn+0x2c/0x64)
[<80174ae8>] (irq_thread_fn) from [<80174e10>] (irq_thread+0x15c/0x240)
[<80174e10>] (irq_thread) from [<801437cc>] (kthread+0x13c/0x16c)
[<801437cc>] (kthread) from [<80107f1c>] (ret_from_fork+0x14/0x38)
Code: e58d5008 e58d400c e58de010 ebee254f (e7f001f2)
---[ end trace 0000000000000002 ]---
Please CC as i am not subscribed. This is my first encounter with the nfc framework!
Best regards
Tim
Hi
Am Montag, 22. Januar 2018, 17:51:51 CET schrieb Tim Sander:
<snip>
> When using the st,stnfc driver linked at the beginning it works with tags:
> nfctool -d nfc0 -p initiate
> Start polling on nfc0 as initiator
>
> Targets found for nfc0
> Tags: [ tag3 ]
> Devices: [ ]
>
> But as soon as i put a X-NUCLEO-NFC04A1 board on the st95hf reader i get the
> following output:
> skbuff: skb_over_panic: text:7f05c48c len:514 put:514 head:9dd26e00
> data:9dd26e01 tail:0x9dd27003 end:0x9dd26f40 dev:<NULL> ------------[ cut
> here ]------------
At least for the out of tree nfcst driver there i was able to fix the error.
The bugsplat shows that the needed space for the buffer is 514 byte,
so by increasing the buffer size to that, the error went away.
---
drivers/nfc/nfcst/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nfc/nfcst/core.c b/drivers/nfc/nfcst/core.c
index 1dba0aae5a97..732d7fd61929 100644
--- a/drivers/nfc/nfcst/core.c
+++ b/drivers/nfc/nfcst/core.c
@@ -63,7 +63,7 @@
#define DEVICE_TAILROOM_LEN 1
/* Command Response interface */
-#define MAX_RESPONSE_BUFFER_SIZE 280
+#define MAX_RESPONSE_BUFFER_SIZE 514
#define ECHORESPONSE 0x55
#define DEVICE_ERR_MASK 0xF
#define DEVICE_TIMEOUT_ERROR 0x87
--
2.7.4
Best regards
Tim