how to use the xdma_event_intr0 in linux-4.4.12

user4052087

In the 3.2 kernel I use

edma_alloc_channel(dma_channel, dma_callback, fpga, EVENTQ_0);

to apply for the dma ch.

but How do I use in 4.4.12 kernel?

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

This has been forwarded to the software team. They will reply here.

0 Cvetolin Shulev-XID over 9 years ago

TI__Guru 65405 points

Hi user4052087,

The edma_alloc_channel() function in 4.4.12 kernel takes only 2 arguments as opposed to 3.2 kernel where the same function takes 4 arguments.
You can find definition of edma_alloc_channel() function and also you can find how it is used in ../linux-4.4.12/drivers/dma/edma.c file.

BR
Tsvetolin Shulev

0 user4052087 over 9 years ago

Prodigy 220 points

I'm using Linux - rt 4.4.12 to read FPGA GPMC bus data information, I want to use to trigger the DMA interrupt XDMA_EVENT_INTR0 pin

I have realized such functions in 3.2.0 kernel, but 4.4.12 in how to implement?

dmas = <&edma 20 21>;
/*dmas = <&edma_xbar 28 0 1>;*/
dma-names = "fpga_dma";

Because the new kernel is not very understanding, i am very confused, thank you for your help!

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

You have already posted the same question here: e2e.ti.com/.../542894 This thread will be merged to your original one.

Processors

Processors forum

how to use the xdma_event_intr0 in linux-4.4.12