On 10/24/2011 05:32 AM, Shashidhar Hiremath wrote:
Hi Arnd,
As explained in previous mail, the IOCTL is actually an inteface to
block layer and it is only expecting read/write commands to be sent
through the interface.The prrof of it can be seen in write_flag
present in the IOCTL structure which indicates the either the command
can be read or a write command.
So, can I submit a linux module to the kernel which uses the same
mmc_ioc_cmd structure and do all the required processing in my module.
To be clear on my requirement:
it is To test ALL SD/MMC Commands and NOT just the Read/Write Commands.
or should I extend the mmc_test module present in kernel to support
testing of individual commands as well ?
I would think the mmc_test module would be a good vehicle to extend to
have it test individual commands.
Of course if there is no documentation or HOWTO use mmc_test module to
test an individual MMC command then the work is kind-of for naught.
Can I get some suggestions on what approach to take ?
On Thu, Oct 20, 2011 at 12:48 PM, Arnd Bergmann<arnd@xxxxxxxx> wrote:
On Thursday 20 October 2011 10:39:00 Shashidhar Hiremath wrote:
I am planning to use the existing IOCTL interface for SD/MMC present
in the kernel.
Since, the IOCTL interface expects a read/write flag , and the MMC
IOCTL is actually an interface to block layer I feel without modifying
the block layer for the support of non-read write commands ,I may not
be able to test the non-read/write commands through the IOCTL
interface .
Is there a way of doing this without modifying block layer ?
Hi Shashidhar,
I think there is actually no problem here at all. The block layer simply
passes the ioctl command number and argument to the driver, which can
do anything with it.
What functionality are you actually looking for?
Arnd
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regards,
Shashidhar Hiremath
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J (James/Jay) Freyensee
Storage Technology Group
Intel Corporation
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