In message <3670F30A.3A05F46A@sharada.ncore.soft.net>  Eshanye wrote:
> Hi,
> 
> I'm using syscall ioctl() to download parameters to EPLD. So as a ' in'
> parameter i'm sending a structure which contains the EPLD file along
> with some other information. The size of the structure is 65560
> (0x10018). But  the cmd of  ioctl() has only at most 13 bits to encode
> the size of the parameter. So i'm not able to send the structure without
> which my card wont work at all. How do you solve this problem ?

1) 	You pass in the pointer to the download-data instead of
        the download data. Than you do a copy{in|out} from that pointer.
	There is no size-limit in that (besides size_t :-)).
2)	You use IOC_VOID (use _IO instead of _IO{R|W|WR}. You get than
        a pointer to that structure in userspace and have to do copy{in|out}.

Stefan


> 
> Thanx
> Esha
> 

--
Stefan Grefen                                Tandem Computers Europe Inc.
grefen@hprc.tandem.com                       High Performance Research Center
 --- Hacking's just another word for nothing left to kludge. ---