Hi Vaibhav,
I think there's value in there, as I'm hearing Mellanox would prefer to
start from a "clean" state, as in pci mode, when they load their driver
after a card FW update.
However, I'm pretty reluctant to make it the default behaviour. It's not
like we haven't had our share of problems on reset before :-)
Furthermore, for non-mlx5 case, we don't really have a reason for this.
I'm thinking we could activate it through a per-adapter property, on
/sys. See comment in one of the patches.
Fred
Le 25/01/2019 à 06:11, Vaibhav Jain a écrit :
Recent updates to OPAL have implemented necessary infrastructure [1] to disable
CAPP and switch PHB back to PCIE mode during fast reset. This small patch-set
uses the same OPAL infrastructure to force disable of CAPP when CXL module is
unloaded via rmmod.
References:
[1]: https://lists.ozlabs.org/pipermail/skiboot/2019-January/013063.html
Vaibhav Jain (2):
powerpc/powernv: Add support for CXL mode switch that need PHB reset
cxl: Force a CAPP reset when unloading CXL module
arch/powerpc/platforms/powernv/pci-cxl.c | 71 +++++++++++++++++++++---
drivers/misc/cxl/cxl.h | 1 +
drivers/misc/cxl/main.c | 3 +
drivers/misc/cxl/pci.c | 25 ++++++++-
4 files changed, 91 insertions(+), 9 deletions(-)
