Linux w/ML403 PLB TEMAC

Tue Feb 13 03:12:59 EST 2007

I am trying to get Linux up on my ML403 board with the PLB TEMAC with
SGDMA.  I am almost there and am not sure where to go now.  I have seen
many posts on this from Robert, Ming, and Rick.  Hopefully somebody know
the answer.  Since I am going to detail how I got to where I am it can be
somewhat of a guide for others (unless I am doing something really wrong).

1.  I started with Linux 2.6.19 from kernel.org.  I copied over the
xparameters_ml40x.h file to xparameters_ml403.h in
arch/ppc/platforms/4xx/xparameters.  Setting up my kernel configuration and
downloading to the board everything worked OK.  ** I did not have the TEMAC
configured or as part of my PPC project.

2.  Next I created a new PPC with the PLB TEMAC and applied all four kernel
patches from PAULUS
(http://source.mvista.com/~ank/paulus-powerpc/20060309/).  A couple of the
files did not patch completely, so I had to do it by hand.  Recompiling the
kernel (with the TEMAC configured to on) I now had network support.

3.  The speed of the network was very poor.  I wanted to implement DMA for
the TEMAC.  I created a new PPC with BSB using DMA on the TEMAC.  Kernel
recompilied without a problem, but upon starting the kernel I got:
[    3.813223] Oops: machine check, sig: 7 [#1]
[    3.864368] NIP: C00E7B08 LR: C00E1640 CTR: 00000000
[    3.923854] REGS: c01c4f50 TRAP: 0202   Not tainted  (2.6.19)
[    3.992778] MSR: 00029030 <EE,ME,IR,DR>  CR: 88000028  XER: 20000000
[    4.069670] TASK = c052ab70[1] 'swapper' THREAD: c052e000
[    4.132247] GPR00: C00E1640 C052FE10 C052AB70 00000000 00000068 C5002200
C04A242C 00000001
[    4.233281] GPR08: 00000000 C04A2304 C5002010 11111111 28000028 FFFFCD64
FFFF0000 FFFF0000
[    4.334318] GPR16: 0B6654D8 FFFF0000 FFFF0000 FFFF0000 FFFF0000 FFFF0000
FFFF0000 FFFF0000
[    4.435353] GPR24: C017E890 00000000 C04A22D8 C017EA00 C017E9C8 C017E888
C04A2260 C04A22D8
[    4.538579] NIP [C00E7B08] XPacketFifoV200a_Initialize+0x74/0x7c
[    4.610762] LR [C00E1640] XTemac_ConfigureFifoAccess+0x28/0x9c
[    4.680752] Call Trace:
[    4.710037] [C052FE10] [C000ADD8] __ioremap+0xe8/0x14c (unreliable)
[    4.785448] [C052FE20] [C00E1640] XTemac_ConfigureFifoAccess+0x28/0x9c
[    4.863880] [C052FE30] [C00DFCF8] Initialize+0x3c/0xd0
[    4.925647] [C052FE40] [C00DF354] xtenet_probe+0x14c/0x5fc
[    4.991581] [C052FEB0] [C00D6B38] really_probe+0x84/0x154
[    5.056472] [C052FED0] [C00D6D04] driver_probe_device+0xdc/0xfc
[    5.127613] [C052FEF0] [C00D6E68] __driver_attach+0x88/0xf4
[    5.194588] [C052FF10] [C00D5CC0] bus_for_each_dev+0x54/0x94
[    5.262604] [C052FF40] [C00D6EF8] driver_attach+0x24/0x34
[    5.327496] [C052FF50] [C00D63E8] bus_add_driver+0x68/0x1b8
[    5.394471] [C052FF70] [C00D744C] driver_register+0x98/0xac
[    5.461446] [C052FF80] [C01BBC00] xtenet_init+0x18/0x28
[    5.524358] [C052FF90] [C0002454] init+0xb0/0x288
[    5.580917] [C052FFF0] [C0004EA0] kernel_thread+0x44/0x60
[    5.645794] Instruction dump:
[    5.681427] 38000000 901f3694 91690004 90a90008 91490000 3800000a
7c0004ac 900a0000
[    5.775062] 80010014 38600000 83e1000c 7c0803a6 <38210010> 4e800020
2c030000 7c0802a6
[    5.875957] Kernel panic - not syncing: Attempted to kill init!

Going back through previous posts I found that I need to upgrade the kernel
driver for the DMA and TEMAC to V3.

4.  From EDK 8.2.02i  SP2.4+0 I copied the files from the BSP to the kernel
using the following steps.
      a.  Copied the files from linux\drivers\net\xilinx_temac of the BSP
to drivers/net/xilinx_temac of the kernel preserving the Makefile from the
kernel.
      b.  To adapter.c I remove the #include xilinx_devices.h and added
#include linux/platform_devices.h and #include platforms/4xx/virtex.h
      c.  To adapter.c I changed all instances of CHECKSUM_HW to
CHECKSUM_PARTIAL
      d.  To the Makefile in linux/drivers/net/xilinux_temac I added
xtemac_stats.o
      e.  I removed the #include xparameters.h from xtemac.h

      f.  Copied the files from linux\drivers\xilinx_common of the BSP to
drivers/xilinx_edk of the kernel.
      g.  In the drivers/xililnx_edk Makefile I removed the line containing
xdma_channel.o xdma_channel_sg.o
      h.  In the drivers/xililnx_edk Makefile I commented out the line with
xlinx_syms.o

5.  Recompiled the kernel I everything was OK.  Starting the kernel
everything looked OK:
[    3.758994] XTemac: using sgDMA mode.
[    3.803211] XTemac: using TxDRE mode
[    3.846160] XTemac: using RxDRE mode
[    3.889186] XTemac: buffer descriptor size: 32768 (0x8000)
[    3.956476] XTemac: (buffer_descriptor_init) phy: 0x4a8000, virt:
0xff100000, size: 0x8000
[    4.069678] eth0: Xilinx TEMAC #0 at 0x81200000 mapped to 0xC5000000,
irq=0
[    4.153560] eth0: XTemac id 1.0f, block id 5, type 8

6.  I am using busybox 1.2.1 which worked fine previously configuring the
network.  Now when I execute ifconfig I get the following problem:
[   12.228721] eth0: XTemac: Options: 0xb8f2
[   24.197749] eth0: XTemac: Not able to set the speed to 1000 (status:
0x148)
[   34.215593] eth0: XTemac: Not able to set the speed to 100 (status:
0x148)
[   44.232349] eth0: XTemac: Not able to set the speed to 10 (status:
0x148)
[   44.313727] eth0: XTemac: could not negotiate speed
[   44.372226] eth0: XTemac: Send Threshold = 16, Receive Threshold = 2
[   44.448421] eth0: XTemac: Send Wait bound = 1, Receive Wait bound = 1
# [   57.180152] eth0: XTemac: PHY Link carrier lost.

Anybody have an suggestions?

Thanks,
Glenn