m8260_cpm_dpfree( )

m8260_cpm_dpfree( )

[Sanjay Kumar]

Hi !

I have few questions regarding MPC8260 ATM device driver.

1. where can I get m8260_cpm_dpfree() function implementation ?
2. For using the m8260_cpm_dpalloc(uint size, uint align) function I have
included
   #include <asm/cpm_8260.h> and having CC_OPTION
 -D__KERNEL__ -DMODULE  -DCONFIG_8260
    in my Makefile. But when I tried to load this driver on
motorola-mtx-ppc_7xx target
    it gives unresolved symbol for m8260_cpm_dpalloc(). I have kernel
Monatavista 2.4.17
    Anything I am missing in this case ?
3. I am including file #include <asm/mpc8260.h> for using define
request_8xxirq.But I am not
   able to include this define.
4. I am including file  <asm/irq.h> for using define SIU_INT_FCC1. But I
am not able
   to include this define.
  Do I am missing something ? I have same CC_OPTION as mentioned above.
Does anything matter
  with kernel version?

 Any idea will be highly appreciated.

regards,
sanjay

 ==============================================================
 Sanjay Kumar                        skumar@giga-stream.de
 GIGA-STREAM UMTS Technologies GmbH  Tel: +49 (07243) 94976-119
 Im Ermlisgrund 8                    Fax: +49 (07243) 94976-100
 76337 Waldbronn
 ==============================================================

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Re: m8260_cpm_dpfree( )

[Alex Zeffertt]

Sanjay,


> 1. where can I get m8260_cpm_dpfree() function implementation ?

You could try porting the dpfree function in
arch/ppc/8xx_io/commproc.c.  However, this function should only really
be necessary if you wish to rmmod the driver.

> 2. For using the m8260_cpm_dpalloc(uint size, uint align) function I have
> included
>    #include <asm/cpm_8260.h> and having CC_OPTION
>  -D__KERNEL__ -DMODULE  -DCONFIG_8260
>     in my Makefile. But when I tried to load this driver on
> motorola-mtx-ppc_7xx target
>     it gives unresolved symbol for m8260_cpm_dpalloc(). I have kernel
> Monatavista 2.4.17
>     Anything I am missing in this case ?

Try adding

#ifdef	CONFIG_8260
EXPORT_SYMBOL(m8260_cpm_dpalloc);
#endif

to arch/ppc/kernel/ppc_ksyms.c

> 3. I am including file #include <asm/mpc8260.h> for using define
> request_8xxirq.But I am not
>    able to include this define.
> 4. I am including file  <asm/irq.h> for using define SIU_INT_FCC1. But I
> am not able
>    to include this define.
>   Do I am missing something ? I have same CC_OPTION as mentioned above.
> Does anything matter
>   with kernel version?
>


Not sure about these problems, but it sounds like you are trying to
build the module standalone, instead of as part of the kernel's "make
modules".  I would recommend the latter as it makes it easier to pick up
the correct gcc flags.

Alex


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Re: m8260_cpm_dpfree( )

[Adam Kaczynski]

Alex Zeffertt wrote:
> Sanjay,
>>1. where can I get m8260_cpm_dpfree() function implementation ?
> You could try porting the dpfree function in
> arch/ppc/8xx_io/commproc.c.  However, this function should only really
> be necessary if you wish to rmmod the driver.
>

I had the same problem last year when I was working with the simple ATM
driver
(http://www.dgt-lab.com.pl/Serwis/ATMdrv8260.tar.gz )
and I decided to make a kind of not very nice looking work-around -
simply to grab and later free the block of memory I needed from the top.

This feature was important for us to debug the driver since I was able
to load, test and later rmmod the driver. However this work-around would
work only if the driver is loaded as the last one (from the drivers
using dp_mem).

I think that there is no reason to implement any more robust allocator
for dp memory since it is used only for very special purposes, allocated
  only during drivers initialization and because this resource is so
limited that any normal allocation mechanism (with a pool of memory
blocks) would be inefficient.

Regards,
Adam


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Re: m8260_cpm_dpfree( )

[Pantelis Antoniou]

Adam Kaczynski wrote:

>
> Alex Zeffertt wrote:
>
>> Sanjay,
>>
>>> 1. where can I get m8260_cpm_dpfree() function implementation ?
>>
>> You could try porting the dpfree function in
>> arch/ppc/8xx_io/commproc.c.  However, this function should only really
>> be necessary if you wish to rmmod the driver.
>>
>
> I had the same problem last year when I was working with the simple ATM
> driver
> (http://www.dgt-lab.com.pl/Serwis/ATMdrv8260.tar.gz )
> and I decided to make a kind of not very nice looking work-around -
> simply to grab and later free the block of memory I needed from the top.
>
> This feature was important for us to debug the driver since I was able
> to load, test and later rmmod the driver. However this work-around would
> work only if the driver is loaded as the last one (from the drivers
> using dp_mem).
>
> I think that there is no reason to implement any more robust allocator
> for dp memory since it is used only for very special purposes, allocated
>  only during drivers initialization and because this resource is so
> limited that any normal allocation mechanism (with a pool of memory
> blocks) would be inefficient.
>
> Regards,
> Adam
>
>
>
>
>
Hi

I just want to point out that I have posted a solution to that problem
some time
ago for the 8xx.

Try searching the list for the patches, they implement a proper
dpalloc/dpfree
with storage management.

Regards

Pantelis


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