linux-kernel - Re: [PATCH v5 09/11] pci_endpoint

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Date:   Thu, 21 Jun 2018 09:49:02 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
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>,
        "adouglas@...ence.com" <adouglas@...ence.com>,
        "jesper.nilsson@...s.com" <jesper.nilsson@...s.com>,
        "sboyd@...eaurora.org" <sboyd@...eaurora.org>
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: [PATCH v5 09/11] pci_endpoint_test: Add 2 ioctl commands

On 06/21/2018 03:23 AM, Gustavo Pimentel wrote:
> On 20/06/2018 19:12, Randy Dunlap wrote:
>> On 06/20/2018 09:28 AM, Gustavo Pimentel wrote:
>>> Add MSI-X support and update driver documentation accordingly.
>>>
>>> Add 2 new IOCTL commands:
>>>  - Allow to reconfigure driver IRQ type in runtime.
>>>  - Allow to retrieve current driver IRQ type configured.
>>>
>>> Signed-off-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
>>> ---
>>> Change v2->v3:                                                                              |  --------------------------------------------------------------------------------------------
>>>  - New patch file created base on the previous patch                                        |  --------------------------------------------------------------------------------------------
>>> "misc: pci_endpoint_test: Add MSI-X support" patch file following                           |  --------------------------------------------------------------------------------------------
>>> Kishon's suggestion.                                                                        |  --------------------------------------------------------------------------------------------
>>> Change v3->v4:                                                                              |  --------------------------------------------------------------------------------------------
>>>  - Rebased to Lorenzo's master branch v4.18-rc1.
>>> Change v4->v5:
>>>  - Nothing changed, just to follow the patch set version.
>>>
>>>  Documentation/misc-devices/pci-endpoint-test.txt |   3 +
>>>  drivers/misc/pci_endpoint_test.c                 | 177 +++++++++++++++++------
>>>  2 files changed, 132 insertions(+), 48 deletions(-)
>>>
>>> diff --git a/Documentation/misc-devices/pci-endpoint-test.txt b/Documentation/misc-devices/pci-endpoint-test.txt
>>> index fdfa0f6..58ccca4 100644
>>> --- a/Documentation/misc-devices/pci-endpoint-test.txt
>>> +++ b/Documentation/misc-devices/pci-endpoint-test.txt
>>> @@ -28,6 +28,9 @@ ioctl
>>>  	      to be tested should be passed as argument.
>>>   PCITEST_MSIX: Tests message signalled interrupts. The MSI-X number
>>>  	      to be tested should be passed as argument.
>>> + PCITEST_SET_IRQTYPE: Changes driver IRQ type configuration. The IRQ type
>>> +	      should be passed as argument (0: Legacy, 1:MSI, 2:MSI-X).
>>> + PCITEST_GET_IRQTYPE: Gets driver IRQ type configuration.
>>>   PCITEST_WRITE: Perform write tests. The size of the buffer should be passed
>>>  		as argument.
>>>   PCITEST_READ: Perform read tests. The size of the buffer should be passed
>>> diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
>>> index 2b58887..82fa0c2 100644
>>> --- a/drivers/misc/pci_endpoint_test.c
>>> +++ b/drivers/misc/pci_endpoint_test.c
>>
>> Hi,
>>
>> The ioctl "type" (as "type" is used in <uapi/asm-generic/ioctl.h>),
>> value of 'P' in this case, should be documented in
>> Documentation/ioctl/ioctl-number.txt.
> 
> Hi Randy,
> 
> I wasn't aware of this file. Adding the entry bellow would be suitable?
> 
> 'P'    01-09   drivers/misc/pci_endpoint_test.c        conflict!

Yes.  Thanks.

-- 
~Randy