RE: [PATCH] PCI Express Advanced Error Reporting Driver

[Nguyen, Tom L]

On Thursday, March 10, 2005 9:23 PM Greg KH wrote:
>> On Thu, Mar 10, 2005 at 03:04:18PM -0800, long wrote:
>> PCI Express error signaling can occur on the PCI Express link itself
>> or on behalf of transactions initiated on the link. PCI Express
>> defines the Advanced Error Reporting capability, which is implemented

>> with a PCI Express advanced error reporting extended capability
>> structure, to provide more robust error reporting. With the Advanced
>> Error Reporting capability a PCI Express component, which detects an
>> error, can send an error message to the Root Port associated with
>> its hierarchy.  

>This patch was too big for lkml, and should also be sent to the
>linux-pci list.  Care to split it up and resend it?

Will split it up and resend.

> Also, how does this tie into the recent discussion about pci error
> recovery?

The standard PCI Specification calls out SERR and PERR. I am not sure
about the recent discussion of PCI error of recovery. It is perhaps
regarding the possibility of recovering from a PERR or SERR. However,
PCI Express error occurs on the PCI Express link or on behalf of
transactions occurred on the PCI Express link. PCI Express component,
which implements PCI Express Advanced Error Reporting Capability, sends
error message to the Root Port to indicate error occurred on the PCI
Express link where it is connected. The PCI Express error recovery is on
behalf of attempting to do a PCI Express link recovery, not PCI error
recovery. It appears that PCI Express AER is disjoint from PCI error
recovery.

Thanks,
Long
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