Re: 2.6.0-test8 scsi logging not working

Re: 2.6.0-test8 scsi logging not working

[jtholmesjr]

I dont take the mail list dist just answer here in and i will see the
answer.

The problem:

I thought
echo "scsi log all" >/proc/scsi/scsi 
with
scsi_logging=y  in .config
would turn on kernel scsi logging and put some notification line
in /var/log/messages
indicating scsi logging was now active at such and such a level

that is not happening and I have a external drive connected via
usb talking scsi that cannot be unmounted and i need to trace
scsi action so I can post here.

lsscsi output is
[0:0:0:0]    disk    USB 2.0  Storage Device   0100  /dev/sda
[1:0:0:0]    disk    Linux    scsi_debug       0004  /dev/sdb



any help would be appreciated.
thanks
jt
--
Please respond to 
jtholmes@jtholmes.com
Not to  jtholmesjr@comcast.net

mmap to Access PCI space?

[Randall Hyde]

Hi All,
I need to access a couple of SATA chips from a user-mode
program (yep, running as root). I know for a fact that my
chip resides at address 0xfc300000 (/proc/iomem and /proc/ide/siimage
tells me this).  Can I do a mmap like the following to access the registers
on ths chip?

fdDevMem = open( "/dev/mem", O_RDWR );
ptr =
    mmap
    (
        NULL,
        4096,
        PROT_READ | PROT_WRITE,
        MAP_SHARED,
        fdDevMem,
        0xfc300000
    );

When I try this, I get a valid pointer back, but it doesn't seem to
be mapped to my si3112 chip register bank.

I've also used code like the following:
ptr =
    mmap
    (
        0xfc300000,
        4096,
        PROT_READ | PROT_WRITE,
        MAP_SHARED | MAP_ANONYMOUS,
        -1,
        0
    );

Same story.
If I use MAP_FIXED and/or MAP_PRIVATE, the mmap call fails.

What am I doing wrong here?
Thanks,
Randy Hyde

Re: 2.6.0-test8 scsi logging not working

[Mike Anderson]

jtholmesjr@comcast.net [jtholmesjr@comcast.net] wrote:
> The problem:
> 
> I thought
> echo "scsi log all" >/proc/scsi/scsi 
> with
> scsi_logging=y  in .config
> would turn on kernel scsi logging and put some notification line
> in /var/log/messages
> indicating scsi logging was now active at such and such a level
> 
> that is not happening and I have a external drive connected via
> usb talking scsi that cannot be unmounted and i need to trace
> scsi action so I can post here.
> 
> lsscsi output is
> [0:0:0:0]    disk    USB 2.0  Storage Device   0100  /dev/sda
> [1:0:0:0]    disk    Linux    scsi_debug       0004  /dev/sdb
> 

The scsi logging interface switched control from proc to sysctl. 

sysctl -w dev.scsi.logging_level=0xffffffff

Will result in a scsi log all. You need to use caution if syslogd is
running and you have other scsi devices.

-andmike
--
Michael Anderson
andmike@us.ibm.com

Re: mmap to Access PCI space?

[David S. Miller]

On Thu, 23 Oct 2003 20:36:12 -0700
"Randall Hyde" <randyhyde@earthlink.net> wrote:

> I need to access a couple of SATA chips from a user-mode
> program (yep, running as root). I know for a fact that my
> chip resides at address 0xfc300000 (/proc/iomem and /proc/ide/siimage
> tells me this).  Can I do a mmap like the following to access the registers
> on ths chip?
> 
> fdDevMem = open( "/dev/mem", O_RDWR );
> ptr =
>     mmap
>     (
>         NULL,
>         4096,
>         PROT_READ | PROT_WRITE,
>         MAP_SHARED,
>         fdDevMem,
>         0xfc300000
>     );

That's not portable and will only work on a few platforms.
Please use mmap() and ioctl() operations on /proc/bus/pci/*
nodes to accomplish your task.