Re: bug report: 3.1.0-rc4 doesn't discover my FC drives

[Heinz Mauelshagen <heinzm@redhat.com>]

On Sun, 2011-11-20 at 17:29 -0500, David Miller wrote:
> From: Heinz Mauelshagen <heinzm@redhat.com>
> Date: Fri, 18 Nov 2011 12:20:02 +0100
> 
> > I'm not able to discover any FC-drives on my E6500
> > (same drives get discovered on an Intel box) with 3.1.0-rc4.
> > 
> > Is this a known issue?
> > Wrong driver?
> > Any hints to analyze further?
> 
> The common problem with hardware as old as these SBUS scsi controllers
> is that the SCSI protocol sequence is done by firmware and this firmware
> is 15 years old and hasn't been updated since.
> 
> So the more recent the devices are which you try to hook up to them,
> the less likely they'll be usable with such an old controller.
> 
> There's a patch below for the qlogicpti driver that will add some
> tracing to the SCSI bus probe, so you can try it out to see what might
> be happening.

Will try.

> 
> But, I wonder, are you sure the drives are attached to the qlogicpti
> card?  You say FC disks, but qlogicpti is SCSI.

If so, my wrong driver point from above applies.

> 
> The SBUS fibre-channel controllers Sun made aren't supported, we had
> to rip the old drivers we had out of the tree nearly 10 years ago
> because 1) the drivers were unmaintained and rapidly rotting and 2) we
> never were able to secure the right to distribute the firmware for
> those cards in any way so people had to extract the firmware from the
> Solaris drivers in a cumbersome way to even to try and use these
> cards.

They were in Aurora 2 still, which got released in 2006, because I could
access the drives with it IIRC. I don't remember to have been forced to
do FW tricks like that with it. Are the drivers floating around
somewhere still?

Thanks,
Heinz

> 
> diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
> index e40dc1c..8d01193 100644
> --- a/drivers/scsi/qlogicpti.c
> +++ b/drivers/scsi/qlogicpti.c
> @@ -48,6 +48,7 @@
>  #include <scsi/scsi_eh.h>
>  #include <scsi/scsi_tcq.h>
>  #include <scsi/scsi_host.h>
> +#include <scsi/scsi_dbg.h>
>  
>  #define MAX_TARGETS	16
>  #define MAX_LUNS	8	/* 32 for 1.31 F/W */
> @@ -1011,6 +1012,8 @@ static int qlogicpti_queuecommand_lck(struct scsi_cmnd *Cmnd, void (*done)(struc
>  	u_int out_ptr;
>  	int in_ptr;
>  
> +	pr_info("qlogicpti: Queueing command %p\n", Cmnd);
> +	scsi_print_command(Cmnd);
>  	Cmnd->scsi_done = done;
>  
>  	in_ptr = qpti->req_in_ptr;
> @@ -1169,12 +1172,19 @@ static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
>  			memcpy(Cmnd->sense_buffer, sts->req_sense_data,
>  			       SCSI_SENSE_BUFFERSIZE);
>  
> +		pr_info("qlogicpti: Completing command %p, entry_type[0x%02x]\n",
> +			Cmnd, sts->hdr.entry_type);
> +		pr_info("qlogicpti: sts->completion_status[0x%016x]\n",
> +			sts->completion_status);
> +
>  		if (sts->hdr.entry_type = ENTRY_STATUS)
>  			Cmnd->result >  			    qlogicpti_return_status(sts, qpti->qpti_id);
>  		else
>  			Cmnd->result = DID_ERROR << 16;
>  
> +		scsi_print_result(Cmnd);
> +
>  		if (scsi_bufflen(Cmnd))
>  			dma_unmap_sg(&qpti->op->dev,
>  				     scsi_sglist(Cmnd), scsi_sg_count(Cmnd),
> --
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