GPMI-NAND Status?

Tue Aug 9 03:58:23 EDT 2011

Hi,

On Tue, Aug 9, 2011 at 8:36 AM, Huang Shijie <b32955 at freescale.com> wrote:
> Hi Koen:
>>
>> Hi,
>>
>> On Mon, Aug 8, 2011 at 12:37 PM, Huang Shijie<b32955 at freescale.com>
>>  wrote:
>>>
>>> Hi,
>>>>
>>>> On my target, the mxs-dma is working for sdio until the gpmi-nand
>>>> gives a timeout. After that the dma for sdio is *not fully* working
>>>> anymore.
>>>>
>>> We need more log in following aspects:
>>> [1] apbh-dma registers
>>> [2] clk registers
>>> [3] gpmi registers
>>>
>>> Please git-apply the patch in the attachment.
>>> It will print out more DMA information WHEN dma-timeout occur.
>>
>> Don't get it. What exactly are you trying to dump?
>> This patch dumps CTRL0, CTRL1, CTRL2, DEVSEL but also some registers
>> of APBH channel0 which is reserved....
>
> sorry, I intended to print out the channel 4(NAND_DEVICE0).
>
> I want to know that:
>  When the dma timeout occurs, whether it caused by the GPMI or by the DMA
> itself.

Ok, I was a little confused about the addresses, but it seems like you
are using mx28 (and corresponding addresses). APBH dma for mx23 has
different address according to the datasheet.
So I adjusted the patch a little for mx23, see attachment.

Here is the log with some comments added on the dma.

# ubiformat /dev/mtd1
ubiformat: mtd1 (nand), size 20971520 bytes (20.0 MiB), 40 eraseblocks
of 524288 bytes (512.0 KiB), min. I/O size 4096 bytes
libscan: scanning eraseblock 0 --  2 % complete  [   86.720000] [
start_dma_without_bch_irq : 393 ] DMA timeout, last DMA :1
[   86.720000] ------------------------DMA DUMP BEGIN ----------
[   86.730000] APBH REG :0 : 30000000   // -> HW_APBH_CTRL0:
AHB_BURST8_EN, APB_BURST4_EN
[   86.730000] APBH REG :10 : 00FF0000   // -> HW_APBH_CTRL1:
CHX_CMDCMPLT_IRQ_EN, no cmdcmplt_irq
[   86.740000] APBH REG :20 : 00000000   // -> HW_APBH_CTRL2: no error_irq
[   86.740000] APBH REG :30 : 00000000   // -> HW_APBH_DEVSEL: "N/A
for apbh bridge dma."
[   86.750000] APBH CH4 REG :200 : 418D7098 // executing last dma
command of command chain (see below)
[   86.750000] APBH CH4 REG :210 : 00000000 // no next command, ok
[   86.750000] APBH CH4 REG :220 : 000001C8 // HW_APBH_CH4_CMD:
COMMAND = NO DMA TRANSFER, IRQONCMPLT, WAIT4ENDCMD, SEMAPHORE,
HALTONTERMINATE
[   86.760000] APBH CH4 REG :230 : 00000000 // HW_APBH_CH4_BAR:
"Address of system memory buffer to be read or written over the AHB
bus." -> strange value ...
[   86.760000] APBH CH4 REG :240 : 00010000 // HW_APBH_CH4_SEMA:
semaphore counter is 1
[   86.770000] APBH CH4 REG :250 : 03A00015 // HW_APBH_CH4_DEBUG1:
LOCK, NEXTCMDADDRVALID, RD_FIFO_EMPTY, WR_FIFO_EMPTY,  STATEMACHINE =
"WAIT_END = 0x15 When the Wait for Command End bit is set, the state
machine enters this state until the DMA device indicates that the
command is complete."
[   86.770000] APBH CH4 REG :260 : 00000000 // -> HW_APBH_CH4_DEBUG2:
no apb of ahb bytes remaining for transfer
[   86.780000] [ 0 ] : ME : 418d7000, next : 418d704c, bits :
00002304, bytes : 00000000, buf : 00000000
[   86.790000] [ 0 ] PIO[0] : 03800000
[   86.790000] [ 0 ] PIO[1] : 00000000
[   86.800000] [ 0 ] PIO[2] : 00000000
[   86.800000] [ 1 ] : ME : 418d704c, next : 418d7098, bits :
00006304, bytes : 00000001, buf : 4181b000
[   86.810000] [ 1 ] PIO[0] : 018010da
[   86.810000] [ 1 ] PIO[1] : 00000000
[   86.820000] [ 1 ] PIO[2] : 000011ff
[   86.820000] [ 2 ] : ME : 418d7098, next : 00000000, bits :
000023c8, bytes : 00000000, buf : 00000000
[   86.830000] [ 2 ] PIO[0] : 038010da
[   86.840000] [ 2 ] PIO[1] : 00000000
[   86.840000] [ 2 ] PIO[2] : 00000000
[   86.840000] ------------------------DMA DUMP END ------------
[   86.850000] [ gpmi_show_regs : 076 ] -------------- Show GPMI
registers ----------
[   86.860000] [ gpmi_show_regs : 079 ] offset 0x000 : 0x238010da
[   86.870000] [ gpmi_show_regs : 079 ] offset 0x010 : 0x00000000
[   86.870000] [ gpmi_show_regs : 079 ] offset 0x020 : 0x000011ff
[   86.880000] [ gpmi_show_regs : 079 ] offset 0x030 : 0x000010da
[   86.890000] [ gpmi_show_regs : 079 ] offset 0x040 : 0x40f0c480
[   86.890000] [ gpmi_show_regs : 079 ] offset 0x050 : 0x40f09000
[   86.900000] [ gpmi_show_regs : 079 ] offset 0x060 : 0x0004000c
[   86.910000] [ gpmi_show_regs : 079 ] offset 0x070 : 0x00010203
[   86.910000] [ gpmi_show_regs : 079 ] offset 0x080 : 0x05000000
[   86.920000] [ gpmi_show_regs : 079 ] offset 0x090 : 0x09020101
[   86.920000] [ gpmi_show_regs : 079 ] offset 0x0a0 : 0x00000030
[   86.930000] [ gpmi_show_regs : 079 ] offset 0x0b0 : 0x80000010
[   86.940000] [ gpmi_show_regs : 079 ] offset 0x0c0 : 0x100000ba
[   86.940000] [ gpmi_show_regs : 079 ] offset 0x0d0 : 0x03000000
[   86.950000] [ gpmi_show_regs : 081 ] -------------- Show GPMI
registers end ----------
[   86.960000] Kernel panic - not syncing: -----------DMA
FAILED------------------

Br,
Koen

>
>
> Please try the new patch.
>
> Best Regards
> Huang Shijie
>>
>> Then it prints some debug info on channel 1 (ssp1) and then alle
>> channel 2 register except the debug register (ssp2 = not used here).
>>
>> What info do you need?
>>
>> Br,
>> Koen
>>
>>> Best Regards
>>> Huang Shijie
>>>
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>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>
>
>
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