Re: AIX 4.3 SCSI ioctl command with IBM 6228
From: Nicholas Dronen (ndronen_at_io.frii.com)
Date: 09/30/03
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Date: 29 Sep 2003 23:03:14 GMT
Joseph Krauze <jkrauze@ccs.neu.edu> wrote:
JK> Hello,
JK> I have a small utility that sends inquiry command to a fiber channel card
JK> using an ioctl call. I open succeeding rhdisk files with openx in
JK> diagnostic mode. I then continue to call ioctl(fd, DKIOCMD, mystruct),
JK> where mystruct is of type struct sc_iocmd, and DKIOCMD implies a
JK> diagnostic inquiry.
JK> The problem is that I am getting an invalid return value, EINVAL, which
JK> tells me that either one of my parameters is wrong and/or the combination
JK> of the arguments is wrong. This could mean that my structure is not filled in
JK> correctly which I have already considered but does not seem to be the
JK> case.
JK> The thing is that this utility has worked in the past with other cards.
JK> With the IBM 6228 it ceases to work. I understand that the IBM 6228 is 64
JK> bit and the sc_iocmd struct is 32 bit but I wouldn't think it should cause
JK> a problem. I also tried using ioctlx() instead and no progress has been
JK> made. The 64-bit sc_cmd struct is resevred for the kernel domain only.
JK> Any ideas or comments?
I don't know exactly what you mean about struct so_iocmd being
32-bit, but it does make me wonder whether the driver expects the
struct so_iocmd argument to be aligned on a 64-bit word.
Regards,
Nicholas
-- "Why shouldn't I top-post?" http://www.aglami.com/tpfaq.html "Meanings are another story." http://www.ifas.org/wa/glossolalia.html
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