66AK2G12: PCIe example

Koichiro Tashiro

Part Number: 66AK2G12

Hi,

This is additional questions for original thread above. My customer is evaluating PCIe.

OS used are below:
ARM Cortex A15(CPU): Linux-RT(ti-processor-sdk-linux-rt-k2g-evm-06.03.00.106)

Customer wants to use ARM(Linux-RT) as Root Complex and read/write data to End Point.
Q1) Is there sample code using EDMA?
Q2) Any sample code available using PIO(Programmed Input/Output), such as using User Space I/O driver ?

Thanks and regards,
Koichiro Tashiro

over 4 years ago

0 Bin Liu over 4 years ago

TI__Guru**** 168101 points

Hi Tashiro-san,

Koichiro Tashiro said:
Q1) Is there sample code using EDMA?

Is the usage in Linux kernel or user space?

Koichiro Tashiro said:
Q2) Any sample code available using PIO(Programmed Input/Output), such as using User Space I/O driver ?

Linux kernel provides a PCIe test tool, please check if it can be a reference.

git.ti.com/.../pcitest.c

0 Koichiro Tashiro over 4 years ago in reply to Bin Liu

TI__Mastermind 22935 points

Hi Bin,

Thanks for your quick reply!

Bin Liu said:
Is the usage in Linux kernel or user space?

Customer wants both kernel and user space.

Bin Liu said:
Linux kernel provides a PCIe test tool, please check if it can be a reference.

Customer checked it, but it seems the code is EP side.
Do you have RC side code, too?

Thanks and regards,
Koichiro Tashiro

+1 Bin Liu over 4 years ago in reply to Koichiro Tashiro

TI__Guru**** 168101 points

Hi Tashiro-san,

Koichiro Tashiro said:
Customer wants both kernel and user space.

I don't think user space program can use DMA. In kernel, EDMA service is provided via DMA Engine API. Please refer to the DMA Engine API documentation in kernel source code for how to use DMA.

Koichiro Tashiro said:
Customer checked it, but it seems the code is EP side.
Do you have RC side code, too?

This is PCIe RC side code to test attached PCIe EP. Please refer to the following document on how to use it.

software-dl.ti.com/.../PCIe_End_Point.html

0 Koichiro Tashiro over 4 years ago in reply to Bin Liu

TI__Mastermind 22935 points

Hi Bin,

Thanks!

Bin Liu said:
This is PCIe RC side code to test attached PCIe EP. Please refer to the following document on how to use it.

Now customer understood it is RC side sample.
Do you have EP side code, too?
Customer wants both side.

Thanks and regards,
Koichiro Tashiro

+1 Bin Liu over 4 years ago in reply to Koichiro Tashiro

TI__Guru**** 168101 points

Hi Tashiro-san,

The EP side code is the kernel pci_epf_test driver mentioned in the document referred in my previous post.

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66AK2G12: PCIe example