Comments (2)
Now I guess this phenomenon is relevant to cache of DMA, but I don't konw how to solve it .
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I have the same issue with zynq-7000. Do you know how to solve it?
It seems to be relevant to a cache issue as you said
What I did:
- add dma-coherent: it led to some errors in the data.
- try to use a zero-copy method moving dam buffer data directly used by the socket: I failed.
However, even the idea succeed. The problem is still not solved, because Eventually, I need the data process in the user space before sending data out.
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Related Issues (20)
- Driver asserting (or expecting in the case for Rx channel) Tlast twice ? Is this expected behavior and this is what it was intended ? HOT 1
- When to start oneway transfer in PS? HOT 1
- Can't build driver on petalinux 2020.2 HOT 2
- No tx_channel and rx_channel devices in /dev. Petalinux 2020.2 HOT 2
- problem about "axidma_oneway_transfer "
- Does the driver support single channel DMA? HOT 8
- 一个小bug及解决办法,应用层程序多次调用问题 HOT 13
- Question about asynchronous transfer return value
- Howto setup continuous DMA transfers? HOT 1
- Using xilinx_axidma driver in Petalinux 2022 and Linux Kernel Version 5.15.19 HOT 1
- One-way transfer from PL to PS
- One-way transfer from PL to PS HOT 2
- axidma: axidma_chrdev.c: axidma_mmap: 294: Unable to allocate contiguous DMA memory region of size 8294400. HOT 3
- axidma_oneway_transfer() transfer issue HOT 5
- Petalinux wont build - Error at axidma_chrdev node in system-user.dtsi HOT 2
- segmentation fault on insmod HOT 2
- how can i use the dma with the interrupt HOT 1
- Unable to handle kernel NULL pointer dereference at virtual address 00000000 HOT 4
- Can axidma_video_transfer work? Kernel stack is corrupted in: axidma_prep_transfer+0x2b8/0x308 HOT 2
- the axidma_transfer.c can't recieve data HOT 3
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