Re: Questions on PCI express AER support in HBA driver

[linas@austin.ibm.com (Linas Vepstas)]

On Thu, Jan 18, 2007 at 11:46:21AM -0800, Allexio Ju wrote:
> Hi,
> 
> I've got some questions on supporting PCI Express AER in Linux HBA drivers.
> BTW, I'm developing SCSI HBA driver.
[...]

> What else does SCSI LLD driver need to changed?

There are several scsi controllers that handle pci error recovery.
For example, look at drivers/scsi/ipr.c, search for 
struct pci_error_handlers. The callback routines there deal
with reseting the driver after an error has been found.

I've posted patches in the past for the symbios driver;
I suppose it is time to clean them up and resubmit them
again; they are not in the kernel yet.

I recently posted patches for the Emulex lpfc fibre channel 
scsi card, google for the subject line
  "[PATCH] lpfc: add PCI error recovery support"

to see what the patch looks like.

All of this work was done on powerpc systems. I have only
a vague idea of how this works on PC-class Intel platforms.

--linas