linux-kernel - RE: [RFC 00/10] Adds pcitest tool support for MSI-X

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Message-ID: <SN6PR07MB4512656ED4FA817D3276665CD8880@SN6PR07MB4512.namprd07.prod.outlook.com>
Date:   Tue, 24 Apr 2018 09:28:33 +0000
From:   Alan Douglas <adouglas@...ence.com>
To:     Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "Joao.Pinto@...opsys.com" <Joao.Pinto@...opsys.com>,
        "jingoohan1@...il.com" <jingoohan1@...il.com>,
        "kishon@...com" <kishon@...com>,
        "jesper.nilsson@...s.com" <jesper.nilsson@...s.com>
CC:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC 00/10] Adds pcitest tool support for MSI-X

On 24 April 2018 09:50, Gustavo Pimentel wrote:
> Hi Alan,
> 
> On 24/04/2018 07:48, Alan Douglas wrote:
> > Hi Gustavo,
> >
> > On 10 April 2018 18:15 Gustavo Pimentel wrote:
> >>  https://lkml.org/lkml/2018/4/10/421
> >>  This series aims to add pcitest tool support for MSI-X.
> >> Includes new callbacks methods and handlers to trigger the MSI-X
> >> interruptions on the EP Designware IP driver.
> >>
> >> Provides new methods on pci_epf_test driver that allows to set/get EP
> >> maximum number of MSI-X entries (similar to set/get MSI methods).
> >>
> >> Reworks on MSI set/get and triggering methods on EP Designware IP
> >> driver to be more generic and flexible.
> >>
> >> Adds a new input parameter (msix) and replicates the whole MSI
> >> mechanism applied to the MSI-X feature on pcitest tool. Also updates
> >> the pcitest script with the new test set applied to this new feature.
> >>
> >> Gustavo Pimentel (10):
> >>   PCI: dwc: Add MSI-X callbacks handler
> >>   PCI: cadence: Update cdns_pcie_ep_raise_irq function signature
> >>   PCI: endpoint: Add MSI-X interfaces
> >>   PCI: dwc: MSI callbacks handler rework
> >>   PCI: dwc: Add legacy interrupt callback handler
> >>   misc: pci_endpoint_test: Add MSI-X support
> >>   misc: pci_endpoint_test: Replace lower into upper case characters
> >>   PCI: endpoint: functions/pci-epf-test: Add MSI-X support
> >>   PCI: endpoint: functions/pci-epf-test: Replace lower into upper case
> >>     characters
> >>   tools: PCI: Add MSI-X support
> >>
> >>  Documentation/misc-devices/pci-endpoint-test.txt |   3 +
> >>  drivers/misc/pci_endpoint_test.c                 | 120 ++++++++++----
> >>  drivers/pci/cadence/pcie-cadence-ep.c            |   2 +-
> >>  drivers/pci/dwc/pci-dra7xx.c                     |   2 +-
> >>  drivers/pci/dwc/pcie-artpec6.c                   |   2 +-
> >>  drivers/pci/dwc/pcie-designware-ep.c             | 201
> >> +++++++++++++++++++++--
> >>  drivers/pci/dwc/pcie-designware-plat.c           |   9 +-
> >>  drivers/pci/dwc/pcie-designware.h                |  40 +++--
> >>  drivers/pci/endpoint/functions/pci-epf-test.c    | 113 +++++++++----
> >>  drivers/pci/endpoint/pci-ep-cfs.c                |  24 +++
> >>  drivers/pci/endpoint/pci-epc-core.c              |  60 ++++++-
> >>  include/linux/pci-epc.h                          |  11 +-
> >>  include/linux/pci-epf.h                          |   1 +
> >>  include/uapi/linux/pcitest.h                     |   1 +
> >>  tools/pci/pcitest.c                              |  18 +-
> >>  tools/pci/pcitest.sh                             |  25 +++
> >>  16 files changed, 528 insertions(+), 104 deletions(-)
> >>
> >> --
> >> 2.7.4
> >>
> > Nice set of patches.  I have tested this with the Cadence EP driver after
> adding MSI-X support, and found a few changes required.
> > I will send you comments.
> 
> Ok, great news!
> 
> Maybe after this patch series submission we could start a new thread about
> new features that could be tested/verified using pcitest. I think this could be
> helpful for everybody.
> 
Great, I think that would definitely be of benefit.
> >
> > Thanks,
> > Alan
> >
> 
> Thanks,
> Gustavo
Thanks,
Alan