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[RFC,0/2] Add Qualcomm PCIe ECAM root complex driver

Message ID 1712257884-23841-1-git-send-email-quic_mrana@quicinc.com (mailing list archive)
Headers show
Series Add Qualcomm PCIe ECAM root complex driver | expand

Message

Mayank Rana April 4, 2024, 7:11 p.m. UTC
On some of Qualcomm platform, firmware takes care of system resources
related to PCIe PHY and controller as well bringing up PCIe link and
having static iATU configuration for PCIe controller to work into
ECAM compliant mode. Hence add Qualcomm PCIe ECAM root complex driver.

Tested:
- Validated NVME functionality with PCIe0 and PCIe1 on SA877p-ride platform

Mayank Rana (2):
  dt-bindings: pcie: Document QCOM PCIE ECAM compatible root complex
  PCI: Add Qualcomm PCIe ECAM root complex driver

 .../devicetree/bindings/pci/qcom,pcie-ecam.yaml    |  94 ++++
 drivers/pci/controller/Kconfig                     |  12 +
 drivers/pci/controller/Makefile                    |   1 +
 drivers/pci/controller/pcie-qcom-ecam.c            | 575 +++++++++++++++++++++
 4 files changed, 682 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/qcom,pcie-ecam.yaml
 create mode 100644 drivers/pci/controller/pcie-qcom-ecam.c

Comments

Krzysztof Kozlowski April 4, 2024, 7:33 p.m. UTC | #1
On 04/04/2024 21:11, Mayank Rana wrote:
> On some of Qualcomm platform, firmware takes care of system resources
> related to PCIe PHY and controller as well bringing up PCIe link and
> having static iATU configuration for PCIe controller to work into
> ECAM compliant mode. Hence add Qualcomm PCIe ECAM root complex driver.
> 
> Tested:
> - Validated NVME functionality with PCIe0 and PCIe1 on SA877p-ride platform
> 

RFC means code is not ready, right? Please get internal review done and
send it when it is ready. I am not sure if you expect any reviews. Some
people send RFC and do not expect reviews. Some expect. I have no clue
and I do not want to waste my time. Please clarify what you expect from
maintainers regarding this contribution.

Best regards,
Krzysztof
Mayank Rana April 4, 2024, 11:02 p.m. UTC | #2
Hi Krzysztof

On 4/4/2024 12:33 PM, Krzysztof Kozlowski wrote:
> On 04/04/2024 21:11, Mayank Rana wrote:
>> On some of Qualcomm platform, firmware takes care of system resources
>> related to PCIe PHY and controller as well bringing up PCIe link and
>> having static iATU configuration for PCIe controller to work into
>> ECAM compliant mode. Hence add Qualcomm PCIe ECAM root complex driver.
>>
>> Tested:
>> - Validated NVME functionality with PCIe0 and PCIe1 on SA877p-ride platform
>>
> 
> RFC means code is not ready, right? Please get internal review done and
> send it when it is ready. I am not sure if you expect any reviews. Some
> people send RFC and do not expect reviews. Some expect. I have no clue
> and I do not want to waste my time. Please clarify what you expect from
> maintainers regarding this contribution.
> 
> Best regards,
> Krzysztof
> 
Thanks for initial comments.
yes, this is work in progress. There are still more functionalities 
planned to be added as part of this driver. Although purpose of sending 
initial change here to get feedback and review comments in terms of 
usage of generic Qualcomm PCIe ECAM driver, and usage of MSI 
functionality with it. I missed mentioning this as part of cover letter. 
So please help to review and provide feedback.

Regards,
Mayank
Krzysztof Kozlowski April 5, 2024, 6:50 a.m. UTC | #3
On 05/04/2024 01:02, Mayank Rana wrote:
> Hi Krzysztof
> 
> On 4/4/2024 12:33 PM, Krzysztof Kozlowski wrote:
>> On 04/04/2024 21:11, Mayank Rana wrote:
>>> On some of Qualcomm platform, firmware takes care of system resources
>>> related to PCIe PHY and controller as well bringing up PCIe link and
>>> having static iATU configuration for PCIe controller to work into
>>> ECAM compliant mode. Hence add Qualcomm PCIe ECAM root complex driver.
>>>
>>> Tested:
>>> - Validated NVME functionality with PCIe0 and PCIe1 on SA877p-ride platform
>>>
>>
>> RFC means code is not ready, right? Please get internal review done and
>> send it when it is ready. I am not sure if you expect any reviews. Some
>> people send RFC and do not expect reviews. Some expect. I have no clue
>> and I do not want to waste my time. Please clarify what you expect from
>> maintainers regarding this contribution.
>>
>> Best regards,
>> Krzysztof
>>
> Thanks for initial comments.
> yes, this is work in progress. There are still more functionalities 
> planned to be added as part of this driver. Although purpose of sending 
> initial change here to get feedback and review comments in terms of 
> usage of generic Qualcomm PCIe ECAM driver, and usage of MSI 
> functionality with it. I missed mentioning this as part of cover letter. 
> So please help to review and provide feedback.

Thanks for explanation. Work in progress as not ready to be merged? Then
I am sorry, I am not going to provide review of unfinished work. I have
many more *finished* patches to review first. You can help with these
too....

Best regards,
Krzysztof
Mayank Rana April 5, 2024, 5:45 p.m. UTC | #4
Hi Krzysztof

On 4/4/2024 11:50 PM, Krzysztof Kozlowski wrote:
> On 05/04/2024 01:02, Mayank Rana wrote:
>> Hi Krzysztof
>>
>> On 4/4/2024 12:33 PM, Krzysztof Kozlowski wrote:
>>> On 04/04/2024 21:11, Mayank Rana wrote:
>>>> On some of Qualcomm platform, firmware takes care of system resources
>>>> related to PCIe PHY and controller as well bringing up PCIe link and
>>>> having static iATU configuration for PCIe controller to work into
>>>> ECAM compliant mode. Hence add Qualcomm PCIe ECAM root complex driver.
>>>>
>>>> Tested:
>>>> - Validated NVME functionality with PCIe0 and PCIe1 on SA877p-ride platform
>>>>
>>>
>>> RFC means code is not ready, right? Please get internal review done and
>>> send it when it is ready. I am not sure if you expect any reviews. Some
>>> people send RFC and do not expect reviews. Some expect. I have no clue
>>> and I do not want to waste my time. Please clarify what you expect from
>>> maintainers regarding this contribution.
>>>
>>> Best regards,
>>> Krzysztof
>>>
>> Thanks for initial comments.
>> yes, this is work in progress. There are still more functionalities
>> planned to be added as part of this driver. Although purpose of sending
>> initial change here to get feedback and review comments in terms of
>> usage of generic Qualcomm PCIe ECAM driver, and usage of MSI
>> functionality with it. I missed mentioning this as part of cover letter.
>> So please help to review and provide feedback.
> 
> Thanks for explanation. Work in progress as not ready to be merged? Then
> I am sorry, I am not going to provide review of unfinished work. I have
> many more *finished* patches to review first. You can help with these
> too....
> 
> Best regards,
> Krzysztof
Ok. I am looking forward to send finished work on this once ready.
Thank you.

Regards,
Mayank