Re: From: Gavin Shan <shangw@linux.vnet.ibm.com>

On Thu, Jun 27, 2013 at 01:46:41PM +0800, Gavin Shan wrote:

The subject went wrong. I didn't make the format correct and here's
the makeup:

[PATCH v4 00/8] Follow-up fixes for EEH on PowerNV

The series of patches are follow-up in order to make EEH workable for PowerNV
platform on Juno-IOC-L machine. Couple of issues have been fixed with help of
Ben:

- Check PCIe link after PHB complete reset
- Restore config space for bridges
- The EEH address cache wasn't built successfully
- Misc cleanup on output messages
- Misc cleanup on EEH flags maintained by "struct pnv_phb"
- Misc cleanup on properties of functions to avoid build warnings
- Let PCI config accessors rely on device node
- Do hotplug during reset for those devices whose drivers can't
  support EEH

---

Trigger frozen PE:

       echo 0x0000000002000000 > /sys/kernel/debug/powerpc/PCI0000/err_injct
       sleep 1
       echo 0x0 > /sys/kernel/debug/powerpc/PCI0000/err_injct

Trigger fenced PHB:

echo 0x8000000000000000 > /sys/kernel/debug/powerpc/PCI0000/err_injct


---

Changelog:
==========
v3 -> v4:
* Add more output messages in EEH core to let users know what the EEH
  core is doing.
* Add one patch to use device node in the PCI config accessors since
  the accessors used by EEH and it's not safe enough to refer PCI device
  and bus. We instead fully utilize the information from PCI_DN.
* Add one patch to remove those deivces whose drivers can't support EEH
  before reset, and add them to the system after reset. 
v2 -> v3:
* Fix overwritten buffer while collecting data from PCI config space.
v1 -> v2:
* Remove the mechanism to block PCI-CFG and MMIO.
* Add one patch to do cleanup on output messages.
* Add one patch to avoid build warnings.
* Split functions to restore BARs for PCI devices and bridges separately.

---

arch/powerpc/include/asm/eeh.h               |    8 +-
arch/powerpc/include/asm/pci.h               |    1 +
arch/powerpc/kernel/eeh.c                    |   43 +++++--
arch/powerpc/kernel/eeh_cache.c              |    4 +-
arch/powerpc/kernel/eeh_driver.c             |  157 +++++++++++++++++++++++-
arch/powerpc/kernel/eeh_pe.c                 |  166 ++++++++++++++++++++++++--
arch/powerpc/kernel/pci_hotplug.c            |    8 +-
arch/powerpc/platforms/powernv/eeh-ioda.c    |   33 +++--
arch/powerpc/platforms/powernv/eeh-powernv.c |   44 +-------
arch/powerpc/platforms/powernv/pci-ioda.c    |    1 +
arch/powerpc/platforms/powernv/pci.c         |  124 ++++++++++++--------
arch/powerpc/platforms/powernv/pci.h         |   11 ++-
drivers/pci/probe.c                          |    6 +-
13 files changed, 462 insertions(+), 144 deletions(-)

Thanks,
Gavin

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