Loading bitstream inside linux #45

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fsagbuya · 2024-03-06T17:16:07+08:00

fsagbuya commented

2024-03-06 17:16:07 +08:00

To load the bitstream inside linux we can use

Device Tree Overlays or
The sysfs interface

Also the we can utilize the command fpgautil from https://github.com/elhep/Fast-Servo-Firmware/blob/master/README.md?plain=1#L132 (.

However, the user-space interface to run those commands is only available when enabling CONFIG_OF_CONFIGFS or the DT overlay ConfigFS interface, which is not available in the mainline Linux for now. There are some proposals about it here.

Proposed approaches are:

(1) Use the linux-xilinx fork
(2) Patch the mainline linux (against the xilinx fork) to have the drivers available
(3) Try to program using the generic FPGA Manager from the mainline linux

Current sysfs interface of the fpga manager from mainline linux:

-bash-5.2# cd ../sys/class/fpga_manager/fpga0 && ls
device	name  of_node  power  state  status  subsystem	uevent

@sb10q Would like to know your thoughts.

To load the bitstream inside linux we can use - [Device Tree Overlays](https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841645/Solution+Zynq+PL+Programming+With+FPGA+Manager#SolutionZynqPLProgrammingWithFPGAManager-UsingDeviceTreeOverlay:) or - The [sysfs interface](https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841645/Solution+Zynq+PL+Programming+With+FPGA+Manager#SolutionZynqPLProgrammingWithFPGAManager-Usingsysfsinterface) Also the we can utilize the command `fpgautil` from https://github.com/elhep/Fast-Servo-Firmware/blob/master/README.md?plain=1#L132 (. However, the user-space interface to run those commands is only available when enabling `CONFIG_OF_CONFIGFS` or the [DT overlay ConfigFS interface](https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841645/Solution+Zynq+PL+Programming+With+FPGA+Manager#SolutionZynqPLProgrammingWithFPGAManager-KernelConfiguration), which is not available in the mainline Linux for now. There are some proposals about it [here](https://lore.kernel.org/lkml/DM6PR12MB3993D5ECA50B27682AEBE19FCD67A@DM6PR12MB3993.namprd12.prod.outlook.com/). Proposed approaches are: - (1) Use the [linux-xilinx](https://github.com/Xilinx/linux-xlnx) fork - (2) Patch the mainline linux (against the xilinx fork) to have the drivers available - (3) Try to program using the [generic FPGA Manager](https://www.kernel.org/doc/html/v5.1/driver-api/fpga/fpga-mgr.html) from the mainline linux Current sysfs interface of the fpga manager from mainline linux: ``` -bash-5.2# cd ../sys/class/fpga_manager/fpga0 && ls device name of_node power state status subsystem uevent ``` @sb10q Would like to know your thoughts.

sb10q commented

2024-03-06 17:57:52 +08:00

Try the mainline solution with the generic FPGA manager. The Linux kernel is developed to a higher standard of quality than most Xilinx software.

👍 1

fsagbuya referenced a pull request that will close this issue

2024-03-14 13:18:11 +08:00

Add FPGA programming support #47

sb10q closed this issue

2024-03-14 14:50:05 +08:00

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