unable to change read and write timeout

[lukasnagel98]

Hi, since the driver is now build in the petalinux kernel, i was unable to run

insmod /lib/modules/4.9.0-xilinx-v2017.4/extra/axis-fifo.ko read_timeout=-1 write_timeout=-1

because the axis-fifo.ko is not found. Where can i change these values?

[jacobfeder]

I'm not sure of the exact path, but I think the driver should still be somewhere in /lib/modules. Maybe run a search there?

[lukasnagel98]

I've found the path where the parameters are stored: in

/sys/module/axis_fifo/parameters

there are two files called read_timeout and write_timeout. They contain the value '1000'. Petalinx however doesn't allow changes Searching returns no file named axis-fifo.ko or even axis-fifo.o. The later can be found in build directorry from petalinux

The startup dialog shows this:

[    5.068438] axis-fifo driver loaded with parameters read_timeout = 1000, write_timeout = 1000
[    5.076954] axis_fifo a0000000.axi_fifo_mm_s: axis-fifo created at 0x00000000a0000000 mapped to 0x0xffff800012b50000, irq=48, major=243, minor=0

[jacobfeder]

Sorry, not sure then. If you could find the driver location maybe you could rmmod then re-add it with insmod

[lukasnagel98]

Okay, i've made some progress. Changing the Kernal Configuration from "*" to "M" modularizes the features. Now i have the right file at

/lib/modules/5.4.0/kernel/drivers/staging/axis-fifo/axis-fifo.ko

I tried to run the insmod command, but it gives me an error since the driver is runnig since startup. Running rmod and re-adding it works.

I'm serching for the startup script where linux loads this driver, so i can modify it to allways launch with -1.