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P2041 issue accessing dma thru pcie

Question asked by Daniel Martins on Jun 5, 2013
Latest reply on Jun 26, 2013 by Scott Wood

My board wich was derived from the p2041rdb, has a broadcom trident+ switch attached to p2040 pci.

U-boot is a 36 bit version of the sdk1.3.2 and Kernel hás the phys_64bit on.

When the broadcom switch tryes to allocate memmory to run his threads, the Kernel crash.

It worked on a previous mpc8544 board with a 32 bit adressing.

Is there any possibility to have a 32 bit dts and u-boot for p2040?

What do you  think the problem may be?


here is the dump :

[ 1131.322055] linux-kernel-bde (738): LTX: Enabled pci device : vendor_id = 14e4, device_id = b846

[ 1131.330886] linux-kernel-bde (738): LTX: Adjusted _pci_mem_start

[ 1131.336910] linux-kernel-bde (738): LTX: Adjusted _pci_mem_end

[ 1131.342774] linux-kernel-bde (738): LTX: Will parse PCI_CAPABILITY_LIST

[ 1131.349438] linux-kernel-bde (738): LTX: BCM: Mapped the device

[ 1131.355380] linux-kernel-bde (738): LTX: BCM: Reached end of _probe

[ 1131.361924] ------------[ cut here ]------------

[ 1131.366548] kernel BUG at mm/slab.c:2978!

[ 1131.370565] Oops: Exception in kernel mode, sig: 5 [#1]

[ 1131.375794] SMP NR_CPUS=8 P2041 RDB

[ 1131.379287] Modules linked in: linux_kernel_bde(+)

[ 1131.384091] NIP: c0508ae0 LR: c05088fc CTR: c00bf364

[ 1131.389064] REGS: e9931be0 TRAP: 0700   Not tainted  (3.0.51-rt75)

[ 1131.395251] MSR: 00021002 <ME,CE>  CR: 24022442  XER: 20000000

[ 1131.401112] TASK = e90f2ab0[738] 'insmod' THREAD: e9930000 CPU: 3

[ 1131.407043] GPR00: 00000000 e9931c90 e90f2ab0 e90025c8 00100100 00200200 e97a6568 00000000

[ 1131.415441] GPR08: c06f7a08 00000000 c06f7a14 00000000 24002442 100fe6bc 7fe3f560 00000000

[ 1131.423839] GPR16: c0000a00 00000014 100f0000 00000000 00000004 00000001 e90025d0 e90025c0

[ 1131.432237] GPR24: 00000004 c0720000 00000020 c0717d80 e9930000 c0718b80 e905b340 e9000ac0

[ 1131.440822] NIP [c0508ae0] cache_alloc_refill+0x28c/0x580

[ 1131.446229] LR [c05088fc] cache_alloc_refill+0xa8/0x580

[ 1131.451459] Call Trace:

[ 1131.453915] [e9931c90] [c01f99ec] ida_get_new_above+0x74/0x238 (unreliable)

[ 1131.460899] [e9931cd0] [c00bf474] __kmalloc+0x110/0x120

[ 1131.466151] [e9931cf0] [f1273b5c] _pgalloc+0xec/0x530 [linux_kernel_bde]

[ 1131.472873] [e9931d60] [f12740f4] _alloc_mpool+0xa4/0x110 [linux_kernel_bde]

[ 1131.479943] [e9931d80] [f1274fac] _init+0xdbc/0x1020 [linux_kernel_bde]

[ 1131.486577] [e9931e60] [f12580c4] init_module+0xc4/0x160 [linux_kernel_bde]

[ 1131.493558] [e9931e70] [c0002078] do_one_initcall+0x148/0x1a8

[ 1131.499318] [e9931ea0] [c006c428] sys_init_module+0xf40/0x1c40

[ 1131.505169] [e9931f40] [c000ebf8] ret_from_syscall+0x0/0x3c

 


Regards


Daniel

 

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