Serial RapidIO Maintaintance read causes lock up

[Bastiaan Nijkamp]

Hi,

We are currently evaluating Serial RapidIO on two WindRiver SBC8548 boards
that use a Freescale Powerquicc III processor (MPC8548E rev. 2). We are
running U-Boot version 2010.09 as bootloader and are using kernel version
2.6.35.6 stable.

We have consulted multiple resources to collect al the requirements for
a successful RapidIO connection (LAW, TLB, Registers) and we seem to have
configured everything correctly. However, as soon as the board that is
configured as the host starts the enumeration process, the system locks up.
It locks in such a manner that we cannot use a JTAG interface to read any of
the registers.  We have also added a breakpoint just before the command that
causes the lock up, to make sure the registers are correctly set at that
point, and it seems they are.

We have tripple checked everything that we could possibly think of and
everything seems to be configured as required but the system keeps
locking-up so there must be something that we are missing. I really hope
that someone could point us in the right direction. The lock-up occurs when
__fsl_read_rio_config is called by fsl_rio_config_read in fsl-rio.c.

The LAW and TLB entries we have added to U-Boot are as follows:

#define CONFIG_RIO 1
#define CONFIG_SYS_RIO_MEM_VIRT 0xc0000000 /* base address */
#define CONFIG_SYS_RIO_MEM_BUS 0xc0000000 /* base address */
#define CONFIG_SYS_RIO_MEM_PHYS 0xc0000000
#define CONFIG_SYS_RIO_MEM_SIZE 0x20000000 /* 512M */

SET_LAW(CONFIG_SYS_RIO_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_RIO),

-------------

Here is the kernel log:

Using SBC8548 machine description
Memory CAM mapping: 256 Mb, residual: 0Mb
Linux version 2.6.35.6 (dl704 at lxws006) (gcc version 4.1.2 (Wind River Linux
Sourcery G++ 4.1-91)) #7 We
d Sep 29 13:27:18 CEST 2010
bootconsole [udbg0] enabled
setup_arch: bootmem
sbc8548_setup_arch()
arch: exit
Zone PFN ranges:
 DMA      0x00000000 -> 0x00010000
 Normal   empty
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
   0: 0x00000000 -> 0x00010000
MMU: Allocated 1088 bytes of context maps for 255 contexts
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 65024
Kernel command line: root=/dev/nfs rw
nfsroot=192.168.100.21:/thales/target/rfs/sbc8548_wrlinux4
ip=192
.168.100.151:192.168.100.21:192.168.100.21:255.255.255.0:sbc8548_1:eth0:off
console=ttyS0,115200 riohdid=1
PID hash table entries: 1024 (order: 0, 4096 bytes)
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 256884k/262144k available (2712k kernel code, 5260k reserved, 112k
data, 77k bss, 144k init)
Kernel virtual memory layout:
 * 0xfffdf000..0xfffff000  : fixmap
 * 0xfc7f9000..0xfe000000  : early ioremap
 * 0xd1000000..0xfc7f9000  : vmalloc & ioremap
Hierarchical RCU implementation.
       RCU-based detection of stalled CPUs is disabled.
       Verbose stalled-CPUs detection is disabled.
NR_IRQS:512 nr_irqs:512
mpic: Setting up MPIC " OpenPIC  " version 1.2 at e0040000, max 1 CPUs
mpic: ISU size: 80, shift: 7, mask: 7f
mpic: Initializing for 80 sources
clocksource: timebase mult[50cede6] shift[22] registered
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
NET: Registered protocol family 16

PCI: Probing PCI hardware
bio: create slab <bio-0> at 0
vgaarb: loaded
Switching to clocksource timebase
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Setting up RapidIO peer-to-peer network /soc8548 at e0000000/rapidio at c0000
fsl-of-rio e00c0000.rapidio: Of-device full name /soc8548 at e0000000
/rapidio at c0000
fsl-of-rio e00c0000.rapidio: Regs: [mem 0xe00c0000-0xe00dffff]
fsl-of-rio e00c0000.rapidio: LAW start 0x00000000c0000000, size
0x0000000020000000.
fsl-of-rio e00c0000.rapidio: pwirq: 48, bellirq: 50, txirq: 53, rxirq 54
fsl-of-rio e00c0000.rapidio: DeviceID is 0x1
fsl-of-rio e00c0000.rapidio: Configured as HOST
fsl-of-rio e00c0000.rapidio: RapidIO PHY type: serial
fsl-of-rio e00c0000.rapidio: Hardware port width: 4
fsl-of-rio e00c0000.rapidio: Training connection status: Four-lane
fsl-of-rio e00c0000.rapidio: RapidIO Common Transport System size: 256
RIO: enumerate master port 0, RIO0 mport
fsl_rio_config_read: index 0 destid 255 hopcount 0 offset 00000068 len 4
fsl_rio_config_read: Passed IS_ALIGNED.
fsl_rio_config_read: Passed 'out_be32_1'
fsl_rio_config_read: Passed 'out_be32_2'
fsl_rio_config_read: len is 4
fsl_rio_config_read: about to trigger '__fsl_read_rio_config'

Regards,
Bastiaan Nijkamp
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20101002/68385a53/attachment.html>