[PATCH 00/11] opencapi: enable card reset and link retraining

[Alexey Kardashevskiy]

Hi Fred,

what is this made against of? It does not apply on the master. Thanks,


On 10/09/2019 01:45, Frederic Barrat wrote:
> This is the linux part of the work to use the PCI hotplug framework to
> control an opencapi card so that it can be reset and re-read after
> flashing a new FPGA image. I had posted it earlier as an RFC and this
> version is mostly similar, with just some minor editing.
> 
> It needs support in skiboot:
> http://patchwork.ozlabs.org/project/skiboot/list/?series=129724
> On an old skiboot, it will do nothing.
> 
> A virtual PCI slot is created for the opencapi adapter, and its state
> can be controlled through the pnv-php hotplug driver:
> 
>   echo 0|1 > /sys/bus/pci/slots/OPENCAPI-<...>/power
> 
> Note that the power to the card is not really turned off, as the card
> needs to stay on to be flashed with a new image. Instead the card is
> in reset.
> 
> The first part of the series mostly deals with the pci/ioda state, as
> the opencapi devices can now go away and the state needs to be cleaned
> up.
> 
> The second part is modifications to the PCI hotplug driver on powernv,
> so that a virtual slot is created for the opencapi adapters found in
> the device tree.
> 
> 
> 
> Frederic Barrat (11):
>   powerpc/powernv/ioda: Fix ref count for devices with their own PE
>   powerpc/powernv/ioda: Protect PE list
>   powerpc/powernv/ioda: set up PE on opencapi device when enabling
>   powerpc/powernv/ioda: Release opencapi device
>   powerpc/powernv/ioda: Find opencapi slot for a device node
>   pci/hotplug/pnv-php: Remove erroneous warning
>   pci/hotplug/pnv-php: Improve error msg on power state change failure
>   pci/hotplug/pnv-php: Register opencapi slots
>   pci/hotplug/pnv-php: Relax check when disabling slot
>   pci/hotplug/pnv-php: Wrap warnings in macro
>   ocxl: Add PCI hotplug dependency to Kconfig
> 
>  arch/powerpc/include/asm/pnv-pci.h        |   1 +
>  arch/powerpc/platforms/powernv/pci-ioda.c | 107 ++++++++++++++--------
>  arch/powerpc/platforms/powernv/pci.c      |  10 +-
>  drivers/misc/ocxl/Kconfig                 |   1 +
>  drivers/pci/hotplug/pnv_php.c             |  82 ++++++++++-------
>  5 files changed, 125 insertions(+), 76 deletions(-)
> 

-- 
Alexey