linux-kernel - Re: [PATCH v9 00/12] Add MSI-X support on pcitest tool

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Message-ID: <77bb1aa0-da1f-be70-b0fe-beeceb544e8e@synopsys.com>
Date:   Mon, 16 Jul 2018 15:49:45 +0100
From:   Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
CC:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "Joao.Pinto@...opsys.com" <Joao.Pinto@...opsys.com>,
        "jingoohan1@...il.com" <jingoohan1@...il.com>,
        "adouglas@...ence.com" <adouglas@...ence.com>,
        "jesper.nilsson@...s.com" <jesper.nilsson@...s.com>,
        "shawn.lin@...k-chips.com" <shawn.lin@...k-chips.com>,
        "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: [PATCH v9 00/12] Add MSI-X support on pcitest tool

Hi Kishon,

On 16/07/2018 05:07, Kishon Vijay Abraham I wrote:
> Hi,
> 
> On Friday 13 July 2018 09:29 PM, Gustavo Pimentel wrote:
>> Hi Lorenzo,
>>
>> On 13/07/2018 14:25, Lorenzo Pieralisi wrote:
>>> On Mon, Jul 09, 2018 at 06:42:38PM +0100, Gustavo Pimentel wrote:
>>>> Patch series made against Lorenzo's master branch.
>>>>
>>>> Fix EP link notification implementation.
>>>>
>>>> Add MSI-X support on pcitest tool.
>>>>
>>>> Add new callbacks methods and handlers to trigger the MSI-X interrupts
>>>> on the EP DesignWare IP driver.
>>>>
>>>> Allow to set/get MSI-X EP maximum capability number.
>>>>
>>>> Rework on set/get and triggering MSI methods on EP DesignWare IP driver.
>>>>
>>>> Add a new input parameter (msix) to pcitest tool to test MSI-X feature.
>>>>
>>>> Update the pcitest.sh script to support MSI-X feature tests.
>>>>
>>>> Gustavo Pimentel (12):
>>>>   PCI: dwc: Fix EP link notification implementation
>>>>   PCI: endpoint: Add MSI-X interfaces
>>>>   PCI: Update xxx_pcie_ep_raise_irq() and pci_epc_raise_irq() signatures
>>>>   PCI: dwc: Add MSI-X callbacks handler
>>>>   PCI: dwc: Rework MSI callbacks handler
>>>>   PCI: dwc: Add legacy interrupt callback handler
>>>>   pci-epf-test/pci_endpoint_test: Cleanup PCI_ENDPOINT_TEST memspace
>>>>   pci-epf-test/pci_endpoint_test: Use irq_type module parameter
>>>>   pci-epf-test/pci_endpoint_test: Add MSI-X support
>>>>   pci_endpoint_test: Add 2 ioctl commands
>>>>   tools: PCI: Add MSI-X support
>>>>   PCI: endpoint: Add MSI set maximum restriction
>>>>
>>>>  Documentation/PCI/endpoint/pci-test-function.txt  |   8 +-
>>>>  Documentation/ioctl/ioctl-number.txt              |   1 +
>>>>  Documentation/misc-devices/pci-endpoint-test.txt  |   6 +
>>>>  drivers/misc/pci_endpoint_test.c                  | 260 ++++++++++++++++------
>>>>  drivers/pci/controller/dwc/pci-dra7xx.c           |   2 +-
>>>>  drivers/pci/controller/dwc/pcie-artpec6.c         |   2 +-
>>>>  drivers/pci/controller/dwc/pcie-designware-ep.c   | 217 ++++++++++++++++--
>>>>  drivers/pci/controller/dwc/pcie-designware-plat.c |  11 +-
>>>>  drivers/pci/controller/dwc/pcie-designware.h      |  31 ++-
>>>>  drivers/pci/controller/pcie-cadence-ep.c          |   3 +-
>>>>  drivers/pci/controller/pcie-rockchip-ep.c         |   2 +-
>>>>  drivers/pci/endpoint/functions/pci-epf-test.c     |  86 +++++--
>>>>  drivers/pci/endpoint/pci-ep-cfs.c                 |  24 ++
>>>>  drivers/pci/endpoint/pci-epc-core.c               |  68 +++++-
>>>>  include/linux/pci-epc.h                           |  16 +-
>>>>  include/linux/pci-epf.h                           |   1 +
>>>>  include/uapi/linux/pcitest.h                      |   3 +
>>>>  tools/pci/pcitest.c                               |  51 ++++-
>>>>  tools/pci/pcitest.sh                              |  15 ++
>>>>  19 files changed, 664 insertions(+), 143 deletions(-)
>>>
>>> Gustavo, Kishon,
>>>
>>> it seems like this series has been thoroughly reviewed and it is
>>> ready to go, please let me know if there is any pending change.
>>
>> I just sent the patch # 10 based on Kishon's latest review.
>> For me it's nearly perfect. :)
> 
> I got to test this series today and I found one issue.
> 
> use this sequence:
> 1) pcitest -i 2 /* change to MSIX irq type */
>    For platforms that doesn't support MSIX, get the following message
>    pci-endpoint-test 0000:01:00.0: Failed to get MSI-X interrupts
>    SET IRQ TYPE TO MSI-X:          NOT OKAY
> 
>    However after this, pci_endpoint_test_set_irq() will invoke
>    pci_endpoint_test_free_irq_vectors() and pci_endpoint_test_release_irq().
>    This will free previously allocated MSI irq vectors.
> 
> 2) pcitest -i 1 /* change to MSI irq type */
> 
>    This will not invoke pci_endpoint_test_alloc_irq_vectors() and
>    pci_endpoint_test_request_irq() since now "if (irq_type == req_irq_type)"
>    will return true.
> 
>    After this MSI tests will fail.
> 
> Other than this failing sequence, the series looks good to me.

It's fixed on the patch series v11 (see patch
#10-pci_endpoint_test-Add-2-ioctl-commands.patch file).
Thanks!

> 
> Thanks
> Kishon
> 

Regards,
Gustavo