linux-kernel - Re: Questions on PCI express AER support in HBA driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Fri, 19 Jan 2007 10:30:49 +0800
From:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
To:	Allexio Ju <allexio.ju@...il.com>
Cc:	linux-pci@...ey.karlin.mff.cuni.cz, linas@...tin.ibm.com,
	yanmin.zhang@...el.com, linux-kernel@...r.kernel.org
Subject: Re: Questions on PCI express AER support in HBA driver

On Thu, 2007-01-18 at 12:46 -0800, Allexio Ju wrote:
> > What are the expected changes on SCSI LLD driver in regards to PCIE
> > AER supporting? I understood that the driver need to call following
> > APIs during probing to enable AER support for the device,
> > ---
> > if (pci_find_aer_capability(dev)) {
> >    pci_enable_pcie_error_reporting(dev);
> > }
This is just to enable the error reporting of the device. One of the important
parts of AER is error recovery.

When an AER error happens, device will send an error message to root port. Then,
root port will notify kernel by interrupt. Kernel will print out error message,
and do error recovery to recover the related devices. Such recovery need device
drivers to provide a couple of callbacks. Documentation/pci-error-recovery.txt
has the detailed callback definitions and the recovery steps.


> > ---
> > What else does SCSI LLD driver need to changed?
Usually, 3 callbacks are enough while error_detected is must.
        int (*error_detected)(struct pci_dev *dev, enum pci_channel_state);
        int (*slot_reset)(struct pci_dev *dev);
        void (*resume)(struct pci_dev *dev);

You could refer to the patches of e1000 drivers written by Linas, or just read
the source codes of the 3 callbacks of e1000 drivers in the latest kernel.

Yanmin

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/